* [PATCH v2 0/5] Make Big QEMU Lock naming consistent
@ 2023-12-12 15:38 Stefan Hajnoczi
2023-12-12 15:39 ` [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() Stefan Hajnoczi
` (4 more replies)
0 siblings, 5 replies; 10+ messages in thread
From: Stefan Hajnoczi @ 2023-12-12 15:38 UTC (permalink / raw)
To: qemu-devel
Cc: Daniel P. Berrangé, Marcel Apfelbaum, Akihiko Odaki,
Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza,
Cédric Le Goater, Paolo Bonzini, BALATON Zoltan,
Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson,
Stefan Hajnoczi, Aleksandar Rikalo, Alexander Graf,
Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen,
Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang,
Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau,
Stefano Stabellini, David Woodhouse, Christian Borntraeger,
Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby,
Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand,
Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani,
qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz,
qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin,
Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov,
Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy,
Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne,
Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm,
Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois,
Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel,
Philippe Mathieu-Daudé
v2:
- Rename APIs bql_*() [PeterX]
- Spell out "Big QEMU Lock (BQL)" in doc comments [PeterX]
- Rename "iolock" variables in hw/remote/mpqemu-link.c [Harsh]
- Fix bql_auto_lock() indentation in Patch 2 [Ilya]
- "with BQL taken" -> "with the BQL taken" [Philippe]
- "under BQL" -> "under the BQL" [Philippe]
The Big QEMU Lock ("BQL") has two other names: "iothread lock" and "QEMU global
mutex". The term "iothread lock" is easily confused with the unrelated --object
iothread (iothread.c).
This series updates the code and documentation to consistently use "BQL". This
makes the code easier to understand.
Stefan Hajnoczi (5):
system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()
qemu/main-loop: rename QEMU_IOTHREAD_LOCK_GUARD to BQL_LOCK_GUARD
qemu/main-loop: rename qemu_cond_wait_iothread() to
qemu_cond_wait_bql()
Replace "iothread lock" with "BQL" in comments
Rename "QEMU global mutex" to "BQL" in comments and docs
docs/devel/multi-thread-tcg.rst | 7 +-
docs/devel/qapi-code-gen.rst | 2 +-
docs/devel/replay.rst | 2 +-
docs/devel/reset.rst | 2 +-
docs/devel/multiple-iothreads.txt | 16 ++--
hw/display/qxl.h | 2 +-
include/block/aio-wait.h | 2 +-
include/block/blockjob.h | 6 +-
include/exec/cpu-common.h | 2 +-
include/exec/memory.h | 4 +-
include/exec/ramblock.h | 2 +-
include/io/task.h | 2 +-
include/migration/register.h | 8 +-
include/qemu/coroutine-core.h | 2 +-
include/qemu/coroutine.h | 2 +-
include/qemu/main-loop.h | 69 ++++++++--------
include/qemu/thread.h | 2 +-
target/arm/internals.h | 4 +-
accel/accel-blocker.c | 10 +--
accel/dummy-cpus.c | 8 +-
accel/hvf/hvf-accel-ops.c | 4 +-
accel/kvm/kvm-accel-ops.c | 4 +-
accel/kvm/kvm-all.c | 22 ++---
accel/tcg/cpu-exec.c | 26 +++---
accel/tcg/cputlb.c | 20 ++---
accel/tcg/tcg-accel-ops-icount.c | 6 +-
accel/tcg/tcg-accel-ops-mttcg.c | 12 +--
accel/tcg/tcg-accel-ops-rr.c | 18 ++--
accel/tcg/tcg-accel-ops.c | 2 +-
accel/tcg/translate-all.c | 2 +-
cpu-common.c | 4 +-
dump/dump.c | 4 +-
hw/block/dataplane/virtio-blk.c | 8 +-
hw/block/virtio-blk.c | 2 +-
hw/core/cpu-common.c | 6 +-
hw/display/virtio-gpu.c | 2 +-
hw/i386/intel_iommu.c | 6 +-
hw/i386/kvm/xen_evtchn.c | 30 +++----
hw/i386/kvm/xen_gnttab.c | 2 +-
hw/i386/kvm/xen_overlay.c | 2 +-
hw/i386/kvm/xen_xenstore.c | 2 +-
hw/intc/arm_gicv3_cpuif.c | 2 +-
hw/intc/s390_flic.c | 18 ++--
hw/mips/mips_int.c | 2 +-
hw/misc/edu.c | 4 +-
hw/misc/imx6_src.c | 2 +-
hw/misc/imx7_src.c | 2 +-
hw/net/xen_nic.c | 8 +-
hw/ppc/pegasos2.c | 2 +-
hw/ppc/ppc.c | 6 +-
hw/ppc/spapr.c | 2 +-
hw/ppc/spapr_events.c | 2 +-
hw/ppc/spapr_rng.c | 4 +-
hw/ppc/spapr_softmmu.c | 4 +-
hw/remote/mpqemu-link.c | 22 ++---
hw/remote/vfio-user-obj.c | 2 +-
hw/s390x/s390-skeys.c | 2 +-
hw/scsi/virtio-scsi-dataplane.c | 6 +-
migration/block-dirty-bitmap.c | 14 ++--
migration/block.c | 40 ++++-----
migration/colo.c | 62 +++++++-------
migration/dirtyrate.c | 12 +--
migration/migration.c | 54 ++++++------
migration/ram.c | 16 ++--
net/tap.c | 2 +-
replay/replay-internal.c | 2 +-
semihosting/console.c | 8 +-
stubs/iothread-lock.c | 6 +-
system/cpu-throttle.c | 6 +-
system/cpus.c | 55 +++++++------
system/dirtylimit.c | 4 +-
system/memory.c | 2 +-
system/physmem.c | 14 ++--
system/runstate.c | 2 +-
system/watchpoint.c | 4 +-
target/arm/arm-powerctl.c | 14 ++--
target/arm/helper.c | 6 +-
target/arm/hvf/hvf.c | 8 +-
target/arm/kvm.c | 4 +-
target/arm/kvm64.c | 4 +-
target/arm/ptw.c | 6 +-
target/arm/tcg/helper-a64.c | 8 +-
target/arm/tcg/m_helper.c | 6 +-
target/arm/tcg/op_helper.c | 24 +++---
target/arm/tcg/psci.c | 2 +-
target/hppa/int_helper.c | 8 +-
target/i386/hvf/hvf.c | 6 +-
target/i386/kvm/hyperv.c | 4 +-
target/i386/kvm/kvm.c | 28 +++----
target/i386/kvm/xen-emu.c | 16 ++--
target/i386/nvmm/nvmm-accel-ops.c | 6 +-
target/i386/nvmm/nvmm-all.c | 20 ++---
target/i386/tcg/sysemu/fpu_helper.c | 6 +-
target/i386/tcg/sysemu/misc_helper.c | 4 +-
target/i386/whpx/whpx-accel-ops.c | 6 +-
target/i386/whpx/whpx-all.c | 24 +++---
target/loongarch/csr_helper.c | 4 +-
target/mips/kvm.c | 4 +-
target/mips/tcg/sysemu/cp0_helper.c | 4 +-
target/openrisc/sys_helper.c | 16 ++--
target/ppc/excp_helper.c | 14 ++--
target/ppc/helper_regs.c | 2 +-
target/ppc/kvm.c | 4 +-
target/ppc/misc_helper.c | 8 +-
target/ppc/timebase_helper.c | 8 +-
target/riscv/cpu_helper.c | 4 +-
target/s390x/kvm/kvm.c | 4 +-
target/s390x/tcg/misc_helper.c | 118 +++++++++++++--------------
target/sparc/int32_helper.c | 2 +-
target/sparc/int64_helper.c | 6 +-
target/sparc/win_helper.c | 20 ++---
target/xtensa/exc_helper.c | 8 +-
ui/spice-core.c | 6 +-
util/async.c | 2 +-
util/main-loop.c | 8 +-
util/qsp.c | 6 +-
util/rcu.c | 16 ++--
audio/coreaudio.m | 8 +-
memory_ldst.c.inc | 18 ++--
target/i386/hvf/README.md | 2 +-
ui/cocoa.m | 56 ++++++-------
121 files changed, 644 insertions(+), 645 deletions(-)
--
2.43.0
^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2023-12-12 15:38 [PATCH v2 0/5] Make Big QEMU Lock naming consistent Stefan Hajnoczi @ 2023-12-12 15:39 ` Stefan Hajnoczi 2023-12-13 1:34 ` Yong Huang ` (2 more replies) 2023-12-12 15:39 ` [PATCH v2 2/5] qemu/main-loop: rename QEMU_IOTHREAD_LOCK_GUARD to BQL_LOCK_GUARD Stefan Hajnoczi ` (3 subsequent siblings) 4 siblings, 3 replies; 10+ messages in thread From: Stefan Hajnoczi @ 2023-12-12 15:39 UTC (permalink / raw) To: qemu-devel Cc: Daniel P. Berrangé, Marcel Apfelbaum, Akihiko Odaki, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Stefan Hajnoczi, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé, David Woodhouse The Big QEMU Lock (BQL) has many names and they are confusing. The actual QemuMutex variable is called qemu_global_mutex but it's commonly referred to as the BQL in discussions and some code comments. The locking APIs, however, are called qemu_mutex_lock_iothread() and qemu_mutex_unlock_iothread(). The "iothread" name is historic and comes from when the main thread was split into into KVM vcpu threads and the "iothread" (now called the main loop thread). I have contributed to the confusion myself by introducing a separate --object iothread, a separate concept unrelated to the BQL. The "iothread" name is no longer appropriate for the BQL. Rename the locking APIs to: - void bql_lock(void) - void bql_unlock(void) - bool bql_locked(void) There are more APIs with "iothread" in their names. Subsequent patches will rename them. There are also comments and documentation that will be updated in later patches. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paul Durrant <paul@xen.org> Acked-by: Fabiano Rosas <farosas@suse.de> Acked-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Cédric Le Goater <clg@kaod.org> Acked-by: Peter Xu <peterx@redhat.com> Acked-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> --- include/block/aio-wait.h | 2 +- include/qemu/main-loop.h | 40 ++++----- include/qemu/thread.h | 2 +- accel/accel-blocker.c | 10 +-- accel/dummy-cpus.c | 8 +- accel/hvf/hvf-accel-ops.c | 4 +- accel/kvm/kvm-accel-ops.c | 4 +- accel/kvm/kvm-all.c | 22 ++--- accel/tcg/cpu-exec.c | 26 +++--- accel/tcg/cputlb.c | 16 ++-- accel/tcg/tcg-accel-ops-icount.c | 4 +- accel/tcg/tcg-accel-ops-mttcg.c | 12 +-- accel/tcg/tcg-accel-ops-rr.c | 14 ++-- accel/tcg/tcg-accel-ops.c | 2 +- accel/tcg/translate-all.c | 2 +- cpu-common.c | 4 +- dump/dump.c | 4 +- hw/core/cpu-common.c | 6 +- hw/i386/intel_iommu.c | 6 +- hw/i386/kvm/xen_evtchn.c | 16 ++-- hw/i386/kvm/xen_overlay.c | 2 +- hw/i386/kvm/xen_xenstore.c | 2 +- hw/intc/arm_gicv3_cpuif.c | 2 +- hw/intc/s390_flic.c | 18 ++-- hw/misc/edu.c | 4 +- hw/misc/imx6_src.c | 2 +- hw/misc/imx7_src.c | 2 +- hw/net/xen_nic.c | 8 +- hw/ppc/pegasos2.c | 2 +- hw/ppc/ppc.c | 4 +- hw/ppc/spapr.c | 2 +- hw/ppc/spapr_rng.c | 4 +- hw/ppc/spapr_softmmu.c | 4 +- hw/remote/mpqemu-link.c | 20 ++--- hw/remote/vfio-user-obj.c | 2 +- hw/s390x/s390-skeys.c | 2 +- migration/block-dirty-bitmap.c | 4 +- migration/block.c | 16 ++-- migration/colo.c | 60 +++++++------- migration/dirtyrate.c | 12 +-- migration/migration.c | 52 ++++++------ migration/ram.c | 12 +-- replay/replay-internal.c | 2 +- semihosting/console.c | 8 +- stubs/iothread-lock.c | 6 +- system/cpu-throttle.c | 4 +- system/cpus.c | 51 ++++++------ system/dirtylimit.c | 4 +- system/memory.c | 2 +- system/physmem.c | 8 +- system/runstate.c | 2 +- system/watchpoint.c | 4 +- target/arm/arm-powerctl.c | 14 ++-- target/arm/helper.c | 4 +- target/arm/hvf/hvf.c | 8 +- target/arm/kvm.c | 4 +- target/arm/kvm64.c | 4 +- target/arm/ptw.c | 6 +- target/arm/tcg/helper-a64.c | 8 +- target/arm/tcg/m_helper.c | 6 +- target/arm/tcg/op_helper.c | 24 +++--- target/arm/tcg/psci.c | 2 +- target/hppa/int_helper.c | 8 +- target/i386/hvf/hvf.c | 6 +- target/i386/kvm/hyperv.c | 4 +- target/i386/kvm/kvm.c | 28 +++---- target/i386/kvm/xen-emu.c | 14 ++-- target/i386/nvmm/nvmm-accel-ops.c | 4 +- target/i386/nvmm/nvmm-all.c | 20 ++--- target/i386/tcg/sysemu/fpu_helper.c | 6 +- target/i386/tcg/sysemu/misc_helper.c | 4 +- target/i386/whpx/whpx-accel-ops.c | 4 +- target/i386/whpx/whpx-all.c | 24 +++--- target/loongarch/csr_helper.c | 4 +- target/mips/kvm.c | 4 +- target/mips/tcg/sysemu/cp0_helper.c | 4 +- target/openrisc/sys_helper.c | 16 ++-- target/ppc/excp_helper.c | 12 +-- target/ppc/kvm.c | 4 +- target/ppc/misc_helper.c | 8 +- target/ppc/timebase_helper.c | 8 +- target/s390x/kvm/kvm.c | 4 +- target/s390x/tcg/misc_helper.c | 118 +++++++++++++-------------- target/sparc/int32_helper.c | 2 +- target/sparc/int64_helper.c | 6 +- target/sparc/win_helper.c | 20 ++--- target/xtensa/exc_helper.c | 8 +- ui/spice-core.c | 4 +- util/async.c | 2 +- util/main-loop.c | 8 +- util/qsp.c | 6 +- util/rcu.c | 14 ++-- audio/coreaudio.m | 4 +- memory_ldst.c.inc | 18 ++-- target/i386/hvf/README.md | 2 +- ui/cocoa.m | 50 ++++++------ 96 files changed, 530 insertions(+), 529 deletions(-) diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h index 5449b6d742..d22ca24329 100644 --- a/include/block/aio-wait.h +++ b/include/block/aio-wait.h @@ -151,7 +151,7 @@ static inline bool in_aio_context_home_thread(AioContext *ctx) } if (ctx == qemu_get_aio_context()) { - return qemu_mutex_iothread_locked(); + return bql_locked(); } else { return false; } diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h index 68e70e61aa..596a206acd 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -248,19 +248,19 @@ GSource *iohandler_get_g_source(void); AioContext *iohandler_get_aio_context(void); /** - * qemu_mutex_iothread_locked: Return lock status of the main loop mutex. + * bql_locked: Return lock status of the Big QEMU Lock (BQL) * - * The main loop mutex is the coarsest lock in QEMU, and as such it + * The Big QEMU Lock (BQL) is the coarsest lock in QEMU, and as such it * must always be taken outside other locks. This function helps * functions take different paths depending on whether the current - * thread is running within the main loop mutex. + * thread is running within the BQL. * * This function should never be used in the block layer, because * unit tests, block layer tools and qemu-storage-daemon do not * have a BQL. * Please instead refer to qemu_in_main_thread(). */ -bool qemu_mutex_iothread_locked(void); +bool bql_locked(void); /** * qemu_in_main_thread: return whether it's possible to safely access @@ -312,58 +312,58 @@ bool qemu_in_main_thread(void); } while (0) /** - * qemu_mutex_lock_iothread: Lock the main loop mutex. + * bql_lock: Lock the Big QEMU Lock (BQL). * - * This function locks the main loop mutex. The mutex is taken by + * This function locks the Big QEMU Lock (BQL). The lock is taken by * main() in vl.c and always taken except while waiting on - * external events (such as with select). The mutex should be taken + * external events (such as with select). The lock should be taken * by threads other than the main loop thread when calling * qemu_bh_new(), qemu_set_fd_handler() and basically all other * functions documented in this file. * - * NOTE: tools currently are single-threaded and qemu_mutex_lock_iothread + * NOTE: tools currently are single-threaded and bql_lock * is a no-op there. */ -#define qemu_mutex_lock_iothread() \ - qemu_mutex_lock_iothread_impl(__FILE__, __LINE__) -void qemu_mutex_lock_iothread_impl(const char *file, int line); +#define bql_lock() \ + bql_lock_impl(__FILE__, __LINE__) +void bql_lock_impl(const char *file, int line); /** - * qemu_mutex_unlock_iothread: Unlock the main loop mutex. + * bql_unlock: Unlock the Big QEMU Lock (BQL). * - * This function unlocks the main loop mutex. The mutex is taken by + * This function unlocks the Big QEMU Lock. The lock is taken by * main() in vl.c and always taken except while waiting on - * external events (such as with select). The mutex should be unlocked + * external events (such as with select). The lock should be unlocked * as soon as possible by threads other than the main loop thread, * because it prevents the main loop from processing callbacks, * including timers and bottom halves. * - * NOTE: tools currently are single-threaded and qemu_mutex_unlock_iothread + * NOTE: tools currently are single-threaded and bql_unlock * is a no-op there. */ -void qemu_mutex_unlock_iothread(void); +void bql_unlock(void); /** * QEMU_IOTHREAD_LOCK_GUARD * - * Wrap a block of code in a conditional qemu_mutex_{lock,unlock}_iothread. + * Wrap a block of code in a conditional bql_{lock,unlock}. */ typedef struct IOThreadLockAuto IOThreadLockAuto; static inline IOThreadLockAuto *qemu_iothread_auto_lock(const char *file, int line) { - if (qemu_mutex_iothread_locked()) { + if (bql_locked()) { return NULL; } - qemu_mutex_lock_iothread_impl(file, line); + bql_lock_impl(file, line); /* Anything non-NULL causes the cleanup function to be called */ return (IOThreadLockAuto *)(uintptr_t)1; } static inline void qemu_iothread_auto_unlock(IOThreadLockAuto *l) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } G_DEFINE_AUTOPTR_CLEANUP_FUNC(IOThreadLockAuto, qemu_iothread_auto_unlock) diff --git a/include/qemu/thread.h b/include/qemu/thread.h index dd3822d7ce..fb74e21c08 100644 --- a/include/qemu/thread.h +++ b/include/qemu/thread.h @@ -47,7 +47,7 @@ typedef void (*QemuCondWaitFunc)(QemuCond *c, QemuMutex *m, const char *f, typedef bool (*QemuCondTimedWaitFunc)(QemuCond *c, QemuMutex *m, int ms, const char *f, int l); -extern QemuMutexLockFunc qemu_bql_mutex_lock_func; +extern QemuMutexLockFunc bql_mutex_lock_func; extern QemuMutexLockFunc qemu_mutex_lock_func; extern QemuMutexTrylockFunc qemu_mutex_trylock_func; extern QemuRecMutexLockFunc qemu_rec_mutex_lock_func; diff --git a/accel/accel-blocker.c b/accel/accel-blocker.c index 1e7f423462..e083f24aa8 100644 --- a/accel/accel-blocker.c +++ b/accel/accel-blocker.c @@ -41,7 +41,7 @@ void accel_blocker_init(void) void accel_ioctl_begin(void) { - if (likely(qemu_mutex_iothread_locked())) { + if (likely(bql_locked())) { return; } @@ -51,7 +51,7 @@ void accel_ioctl_begin(void) void accel_ioctl_end(void) { - if (likely(qemu_mutex_iothread_locked())) { + if (likely(bql_locked())) { return; } @@ -62,7 +62,7 @@ void accel_ioctl_end(void) void accel_cpu_ioctl_begin(CPUState *cpu) { - if (unlikely(qemu_mutex_iothread_locked())) { + if (unlikely(bql_locked())) { return; } @@ -72,7 +72,7 @@ void accel_cpu_ioctl_begin(CPUState *cpu) void accel_cpu_ioctl_end(CPUState *cpu) { - if (unlikely(qemu_mutex_iothread_locked())) { + if (unlikely(bql_locked())) { return; } @@ -105,7 +105,7 @@ void accel_ioctl_inhibit_begin(void) * We allow to inhibit only when holding the BQL, so we can identify * when an inhibitor wants to issue an ioctl easily. */ - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); /* Block further invocations of the ioctls outside the BQL. */ CPU_FOREACH(cpu) { diff --git a/accel/dummy-cpus.c b/accel/dummy-cpus.c index b75c919ac3..f4b0ec5890 100644 --- a/accel/dummy-cpus.c +++ b/accel/dummy-cpus.c @@ -24,7 +24,7 @@ static void *dummy_cpu_thread_fn(void *arg) rcu_register_thread(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_thread_get_self(cpu->thread); cpu->thread_id = qemu_get_thread_id(); cpu->neg.can_do_io = true; @@ -43,7 +43,7 @@ static void *dummy_cpu_thread_fn(void *arg) qemu_guest_random_seed_thread_part2(cpu->random_seed); do { - qemu_mutex_unlock_iothread(); + bql_unlock(); #ifndef _WIN32 do { int sig; @@ -56,11 +56,11 @@ static void *dummy_cpu_thread_fn(void *arg) #else qemu_sem_wait(&cpu->sem); #endif - qemu_mutex_lock_iothread(); + bql_lock(); qemu_wait_io_event(cpu); } while (!cpu->unplug); - qemu_mutex_unlock_iothread(); + bql_unlock(); rcu_unregister_thread(); return NULL; } diff --git a/accel/hvf/hvf-accel-ops.c b/accel/hvf/hvf-accel-ops.c index abe7adf7ee..8eabb696fa 100644 --- a/accel/hvf/hvf-accel-ops.c +++ b/accel/hvf/hvf-accel-ops.c @@ -424,7 +424,7 @@ static void *hvf_cpu_thread_fn(void *arg) rcu_register_thread(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_thread_get_self(cpu->thread); cpu->thread_id = qemu_get_thread_id(); @@ -449,7 +449,7 @@ static void *hvf_cpu_thread_fn(void *arg) hvf_vcpu_destroy(cpu); cpu_thread_signal_destroyed(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); rcu_unregister_thread(); return NULL; } diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c index 6195150a0b..45ff06e953 100644 --- a/accel/kvm/kvm-accel-ops.c +++ b/accel/kvm/kvm-accel-ops.c @@ -33,7 +33,7 @@ static void *kvm_vcpu_thread_fn(void *arg) rcu_register_thread(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_thread_get_self(cpu->thread); cpu->thread_id = qemu_get_thread_id(); cpu->neg.can_do_io = true; @@ -58,7 +58,7 @@ static void *kvm_vcpu_thread_fn(void *arg) kvm_destroy_vcpu(cpu); cpu_thread_signal_destroyed(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); rcu_unregister_thread(); return NULL; } diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index e39a810a4e..09404b897f 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -817,7 +817,7 @@ static void kvm_dirty_ring_flush(void) * should always be with BQL held, serialization is guaranteed. * However, let's be sure of it. */ - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); /* * First make sure to flush the hardware buffers by kicking all * vcpus out in a synchronous way. @@ -1402,9 +1402,9 @@ static void *kvm_dirty_ring_reaper_thread(void *data) trace_kvm_dirty_ring_reaper("wakeup"); r->reaper_state = KVM_DIRTY_RING_REAPER_REAPING; - qemu_mutex_lock_iothread(); + bql_lock(); kvm_dirty_ring_reap(s, NULL); - qemu_mutex_unlock_iothread(); + bql_unlock(); r->reaper_iteration++; } @@ -2828,7 +2828,7 @@ int kvm_cpu_exec(CPUState *cpu) return EXCP_HLT; } - qemu_mutex_unlock_iothread(); + bql_unlock(); cpu_exec_start(cpu); do { @@ -2868,11 +2868,11 @@ int kvm_cpu_exec(CPUState *cpu) #ifdef KVM_HAVE_MCE_INJECTION if (unlikely(have_sigbus_pending)) { - qemu_mutex_lock_iothread(); + bql_lock(); kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, pending_sigbus_addr); have_sigbus_pending = false; - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif @@ -2942,7 +2942,7 @@ int kvm_cpu_exec(CPUState *cpu) * still full. Got kicked by KVM_RESET_DIRTY_RINGS. */ trace_kvm_dirty_ring_full(cpu->cpu_index); - qemu_mutex_lock_iothread(); + bql_lock(); /* * We throttle vCPU by making it sleep once it exit from kernel * due to dirty ring full. In the dirtylimit scenario, reaping @@ -2954,7 +2954,7 @@ int kvm_cpu_exec(CPUState *cpu) } else { kvm_dirty_ring_reap(kvm_state, NULL); } - qemu_mutex_unlock_iothread(); + bql_unlock(); dirtylimit_vcpu_execute(cpu); ret = 0; break; @@ -2970,9 +2970,9 @@ int kvm_cpu_exec(CPUState *cpu) break; case KVM_SYSTEM_EVENT_CRASH: kvm_cpu_synchronize_state(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_system_guest_panicked(cpu_get_crash_info(cpu)); - qemu_mutex_unlock_iothread(); + bql_unlock(); ret = 0; break; default: @@ -2989,7 +2989,7 @@ int kvm_cpu_exec(CPUState *cpu) } while (ret == 0); cpu_exec_end(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); if (ret < 0) { cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index c938eb96f8..67eda9865e 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -558,8 +558,8 @@ static void cpu_exec_longjmp_cleanup(CPUState *cpu) tcg_ctx->gen_tb = NULL; } #endif - if (qemu_mutex_iothread_locked()) { - qemu_mutex_unlock_iothread(); + if (bql_locked()) { + bql_unlock(); } assert_no_pages_locked(); } @@ -680,10 +680,10 @@ static inline bool cpu_handle_halt(CPUState *cpu) #if defined(TARGET_I386) if (cpu->interrupt_request & CPU_INTERRUPT_POLL) { X86CPU *x86_cpu = X86_CPU(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); apic_poll_irq(x86_cpu->apic_state); cpu_reset_interrupt(cpu, CPU_INTERRUPT_POLL); - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif /* TARGET_I386 */ if (!cpu_has_work(cpu)) { @@ -749,9 +749,9 @@ static inline bool cpu_handle_exception(CPUState *cpu, int *ret) #else if (replay_exception()) { CPUClass *cc = CPU_GET_CLASS(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); cc->tcg_ops->do_interrupt(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); cpu->exception_index = -1; if (unlikely(cpu->singlestep_enabled)) { @@ -812,7 +812,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, if (unlikely(qatomic_read(&cpu->interrupt_request))) { int interrupt_request; - qemu_mutex_lock_iothread(); + bql_lock(); interrupt_request = cpu->interrupt_request; if (unlikely(cpu->singlestep_enabled & SSTEP_NOIRQ)) { /* Mask out external interrupts for this step. */ @@ -821,7 +821,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, if (interrupt_request & CPU_INTERRUPT_DEBUG) { cpu->interrupt_request &= ~CPU_INTERRUPT_DEBUG; cpu->exception_index = EXCP_DEBUG; - qemu_mutex_unlock_iothread(); + bql_unlock(); return true; } #if !defined(CONFIG_USER_ONLY) @@ -832,7 +832,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, cpu->interrupt_request &= ~CPU_INTERRUPT_HALT; cpu->halted = 1; cpu->exception_index = EXCP_HLT; - qemu_mutex_unlock_iothread(); + bql_unlock(); return true; } #if defined(TARGET_I386) @@ -843,14 +843,14 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, cpu_svm_check_intercept_param(env, SVM_EXIT_INIT, 0, 0); do_cpu_init(x86_cpu); cpu->exception_index = EXCP_HALTED; - qemu_mutex_unlock_iothread(); + bql_unlock(); return true; } #else else if (interrupt_request & CPU_INTERRUPT_RESET) { replay_interrupt(); cpu_reset(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); return true; } #endif /* !TARGET_I386 */ @@ -873,7 +873,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, */ if (unlikely(cpu->singlestep_enabled)) { cpu->exception_index = EXCP_DEBUG; - qemu_mutex_unlock_iothread(); + bql_unlock(); return true; } cpu->exception_index = -1; @@ -892,7 +892,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, } /* If we exit via cpu_loop_exit/longjmp it is reset in cpu_exec */ - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* Finally, check if we need to exit to the main loop. */ diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index db3f93fda9..5698a9fd8e 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -2030,10 +2030,10 @@ static uint64_t do_ld_mmio_beN(CPUState *cpu, CPUTLBEntryFull *full, section = io_prepare(&mr_offset, cpu, full->xlat_section, attrs, addr, ra); mr = section->mr; - qemu_mutex_lock_iothread(); + bql_lock(); ret = int_ld_mmio_beN(cpu, full, ret_be, addr, size, mmu_idx, type, ra, mr, mr_offset); - qemu_mutex_unlock_iothread(); + bql_unlock(); return ret; } @@ -2054,12 +2054,12 @@ static Int128 do_ld16_mmio_beN(CPUState *cpu, CPUTLBEntryFull *full, section = io_prepare(&mr_offset, cpu, full->xlat_section, attrs, addr, ra); mr = section->mr; - qemu_mutex_lock_iothread(); + bql_lock(); a = int_ld_mmio_beN(cpu, full, ret_be, addr, size - 8, mmu_idx, MMU_DATA_LOAD, ra, mr, mr_offset); b = int_ld_mmio_beN(cpu, full, ret_be, addr + size - 8, 8, mmu_idx, MMU_DATA_LOAD, ra, mr, mr_offset + size - 8); - qemu_mutex_unlock_iothread(); + bql_unlock(); return int128_make128(b, a); } @@ -2577,10 +2577,10 @@ static uint64_t do_st_mmio_leN(CPUState *cpu, CPUTLBEntryFull *full, section = io_prepare(&mr_offset, cpu, full->xlat_section, attrs, addr, ra); mr = section->mr; - qemu_mutex_lock_iothread(); + bql_lock(); ret = int_st_mmio_leN(cpu, full, val_le, addr, size, mmu_idx, ra, mr, mr_offset); - qemu_mutex_unlock_iothread(); + bql_unlock(); return ret; } @@ -2601,12 +2601,12 @@ static uint64_t do_st16_mmio_leN(CPUState *cpu, CPUTLBEntryFull *full, section = io_prepare(&mr_offset, cpu, full->xlat_section, attrs, addr, ra); mr = section->mr; - qemu_mutex_lock_iothread(); + bql_lock(); int_st_mmio_leN(cpu, full, int128_getlo(val_le), addr, 8, mmu_idx, ra, mr, mr_offset); ret = int_st_mmio_leN(cpu, full, int128_gethi(val_le), addr + 8, size - 8, mmu_idx, ra, mr, mr_offset + 8); - qemu_mutex_unlock_iothread(); + bql_unlock(); return ret; } diff --git a/accel/tcg/tcg-accel-ops-icount.c b/accel/tcg/tcg-accel-ops-icount.c index b25685fb71..5824d92580 100644 --- a/accel/tcg/tcg-accel-ops-icount.c +++ b/accel/tcg/tcg-accel-ops-icount.c @@ -126,9 +126,9 @@ void icount_prepare_for_run(CPUState *cpu, int64_t cpu_budget) * We're called without the iothread lock, so must take it while * we're calling timer handlers. */ - qemu_mutex_lock_iothread(); + bql_lock(); icount_notify_aio_contexts(); - qemu_mutex_unlock_iothread(); + bql_unlock(); } } diff --git a/accel/tcg/tcg-accel-ops-mttcg.c b/accel/tcg/tcg-accel-ops-mttcg.c index fac80095bb..af7307013a 100644 --- a/accel/tcg/tcg-accel-ops-mttcg.c +++ b/accel/tcg/tcg-accel-ops-mttcg.c @@ -76,7 +76,7 @@ static void *mttcg_cpu_thread_fn(void *arg) rcu_add_force_rcu_notifier(&force_rcu.notifier); tcg_register_thread(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_thread_get_self(cpu->thread); cpu->thread_id = qemu_get_thread_id(); @@ -91,9 +91,9 @@ static void *mttcg_cpu_thread_fn(void *arg) do { if (cpu_can_run(cpu)) { int r; - qemu_mutex_unlock_iothread(); + bql_unlock(); r = tcg_cpus_exec(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); switch (r) { case EXCP_DEBUG: cpu_handle_guest_debug(cpu); @@ -105,9 +105,9 @@ static void *mttcg_cpu_thread_fn(void *arg) */ break; case EXCP_ATOMIC: - qemu_mutex_unlock_iothread(); + bql_unlock(); cpu_exec_step_atomic(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); default: /* Ignore everything else? */ break; @@ -119,7 +119,7 @@ static void *mttcg_cpu_thread_fn(void *arg) } while (!cpu->unplug || cpu_can_run(cpu)); tcg_cpus_destroy(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); rcu_remove_force_rcu_notifier(&force_rcu.notifier); rcu_unregister_thread(); return NULL; diff --git a/accel/tcg/tcg-accel-ops-rr.c b/accel/tcg/tcg-accel-ops-rr.c index 611932f3c3..c4ea372a3f 100644 --- a/accel/tcg/tcg-accel-ops-rr.c +++ b/accel/tcg/tcg-accel-ops-rr.c @@ -188,7 +188,7 @@ static void *rr_cpu_thread_fn(void *arg) rcu_add_force_rcu_notifier(&force_rcu); tcg_register_thread(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_thread_get_self(cpu->thread); cpu->thread_id = qemu_get_thread_id(); @@ -218,9 +218,9 @@ static void *rr_cpu_thread_fn(void *arg) /* Only used for icount_enabled() */ int64_t cpu_budget = 0; - qemu_mutex_unlock_iothread(); + bql_unlock(); replay_mutex_lock(); - qemu_mutex_lock_iothread(); + bql_lock(); if (icount_enabled()) { int cpu_count = rr_cpu_count(); @@ -254,7 +254,7 @@ static void *rr_cpu_thread_fn(void *arg) if (cpu_can_run(cpu)) { int r; - qemu_mutex_unlock_iothread(); + bql_unlock(); if (icount_enabled()) { icount_prepare_for_run(cpu, cpu_budget); } @@ -262,15 +262,15 @@ static void *rr_cpu_thread_fn(void *arg) if (icount_enabled()) { icount_process_data(cpu); } - qemu_mutex_lock_iothread(); + bql_lock(); if (r == EXCP_DEBUG) { cpu_handle_guest_debug(cpu); break; } else if (r == EXCP_ATOMIC) { - qemu_mutex_unlock_iothread(); + bql_unlock(); cpu_exec_step_atomic(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); break; } } else if (cpu->stop) { diff --git a/accel/tcg/tcg-accel-ops.c b/accel/tcg/tcg-accel-ops.c index 1b57290682..813065c0ec 100644 --- a/accel/tcg/tcg-accel-ops.c +++ b/accel/tcg/tcg-accel-ops.c @@ -88,7 +88,7 @@ static void tcg_cpu_reset_hold(CPUState *cpu) /* mask must never be zero, except for A20 change call */ void tcg_handle_interrupt(CPUState *cpu, int mask) { - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); cpu->interrupt_request |= mask; diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 79a88f5fb7..1737bb3da5 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -649,7 +649,7 @@ void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr) void cpu_interrupt(CPUState *cpu, int mask) { - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); cpu->interrupt_request |= mask; qatomic_set(&cpu->neg.icount_decr.u16.high, -1); } diff --git a/cpu-common.c b/cpu-common.c index c81fd72d16..ce78273af5 100644 --- a/cpu-common.c +++ b/cpu-common.c @@ -351,11 +351,11 @@ void process_queued_cpu_work(CPUState *cpu) * BQL, so it goes to sleep; start_exclusive() is sleeping too, so * neither CPU can proceed. */ - qemu_mutex_unlock_iothread(); + bql_unlock(); start_exclusive(); wi->func(cpu, wi->data); end_exclusive(); - qemu_mutex_lock_iothread(); + bql_lock(); } else { wi->func(cpu, wi->data); } diff --git a/dump/dump.c b/dump/dump.c index 4819050764..84064d890d 100644 --- a/dump/dump.c +++ b/dump/dump.c @@ -108,11 +108,11 @@ static int dump_cleanup(DumpState *s) s->guest_note = NULL; if (s->resume) { if (s->detached) { - qemu_mutex_lock_iothread(); + bql_lock(); } vm_start(); if (s->detached) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } } migrate_del_blocker(&dump_migration_blocker); diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c index 82dae51a55..a59e2ce645 100644 --- a/hw/core/cpu-common.c +++ b/hw/core/cpu-common.c @@ -70,14 +70,14 @@ CPUState *cpu_create(const char *typename) * BQL here if we need to. cpu_interrupt assumes it is held.*/ void cpu_reset_interrupt(CPUState *cpu, int mask) { - bool need_lock = !qemu_mutex_iothread_locked(); + bool need_lock = !bql_locked(); if (need_lock) { - qemu_mutex_lock_iothread(); + bql_lock(); } cpu->interrupt_request &= ~mask; if (need_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } } diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 5085a6fee3..7e310109cf 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -1665,7 +1665,7 @@ static bool vtd_switch_address_space(VTDAddressSpace *as) { bool use_iommu, pt; /* Whether we need to take the BQL on our own */ - bool take_bql = !qemu_mutex_iothread_locked(); + bool take_bql = !bql_locked(); assert(as); @@ -1683,7 +1683,7 @@ static bool vtd_switch_address_space(VTDAddressSpace *as) * it. We'd better make sure we have had it already, or, take it. */ if (take_bql) { - qemu_mutex_lock_iothread(); + bql_lock(); } /* Turn off first then on the other */ @@ -1738,7 +1738,7 @@ static bool vtd_switch_address_space(VTDAddressSpace *as) } if (take_bql) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } return use_iommu; diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c index 02b8cbf8df..d7d15cfaf7 100644 --- a/hw/i386/kvm/xen_evtchn.c +++ b/hw/i386/kvm/xen_evtchn.c @@ -425,7 +425,7 @@ void xen_evtchn_set_callback_level(int level) * effect immediately. That just leaves interdomain loopback as the case * which uses the BH. */ - if (!qemu_mutex_iothread_locked()) { + if (!bql_locked()) { qemu_bh_schedule(s->gsi_bh); return; } @@ -459,7 +459,7 @@ int xen_evtchn_set_callback_param(uint64_t param) * We need the BQL because set_callback_pci_intx() may call into PCI code, * and because we may need to manipulate the old and new GSI levels. */ - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); qemu_mutex_lock(&s->port_lock); switch (type) { @@ -1037,7 +1037,7 @@ static int close_port(XenEvtchnState *s, evtchn_port_t port, XenEvtchnPort *p = &s->port_table[port]; /* Because it *might* be a PIRQ port */ - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); switch (p->type) { case EVTCHNSTAT_closed: @@ -1104,7 +1104,7 @@ int xen_evtchn_soft_reset(void) return -ENOTSUP; } - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); qemu_mutex_lock(&s->port_lock); @@ -1601,7 +1601,7 @@ bool xen_evtchn_set_gsi(int gsi, int level) XenEvtchnState *s = xen_evtchn_singleton; int pirq; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); if (!s || gsi < 0 || gsi >= IOAPIC_NUM_PINS) { return false; @@ -1712,7 +1712,7 @@ void xen_evtchn_snoop_msi(PCIDevice *dev, bool is_msix, unsigned int vector, return; } - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); pirq = msi_pirq_target(addr, data); @@ -1749,7 +1749,7 @@ int xen_evtchn_translate_pirq_msi(struct kvm_irq_routing_entry *route, return 1; /* Not a PIRQ */ } - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); pirq = msi_pirq_target(address, data); if (!pirq || pirq >= s->nr_pirqs) { @@ -1796,7 +1796,7 @@ bool xen_evtchn_deliver_pirq_msi(uint64_t address, uint32_t data) return false; } - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); pirq = msi_pirq_target(address, data); if (!pirq || pirq >= s->nr_pirqs) { diff --git a/hw/i386/kvm/xen_overlay.c b/hw/i386/kvm/xen_overlay.c index 39fda1b72c..1722294638 100644 --- a/hw/i386/kvm/xen_overlay.c +++ b/hw/i386/kvm/xen_overlay.c @@ -194,7 +194,7 @@ int xen_overlay_map_shinfo_page(uint64_t gpa) return -ENOENT; } - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); if (s->shinfo_gpa) { /* If removing shinfo page, turn the kernel magic off first */ diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c index 6e651960b3..ae27889a3f 100644 --- a/hw/i386/kvm/xen_xenstore.c +++ b/hw/i386/kvm/xen_xenstore.c @@ -1341,7 +1341,7 @@ static void fire_watch_cb(void *opaque, const char *path, const char *token) { XenXenstoreState *s = opaque; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); /* * If there's a response pending, we obviously can't scribble over diff --git a/hw/intc/arm_gicv3_cpuif.c b/hw/intc/arm_gicv3_cpuif.c index ab1a00508e..77c2a6dd3b 100644 --- a/hw/intc/arm_gicv3_cpuif.c +++ b/hw/intc/arm_gicv3_cpuif.c @@ -934,7 +934,7 @@ void gicv3_cpuif_update(GICv3CPUState *cs) ARMCPU *cpu = ARM_CPU(cs->cpu); CPUARMState *env = &cpu->env; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); trace_gicv3_cpuif_update(gicv3_redist_affid(cs), cs->hppi.irq, cs->hppi.grp, cs->hppi.prio); diff --git a/hw/intc/s390_flic.c b/hw/intc/s390_flic.c index 74e02858d4..93b8531ad0 100644 --- a/hw/intc/s390_flic.c +++ b/hw/intc/s390_flic.c @@ -106,7 +106,7 @@ static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id, QEMUS390FlicIO *cur, *next; uint8_t isc; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); if (!(flic->pending & FLIC_PENDING_IO)) { return 0; } @@ -223,7 +223,7 @@ uint32_t qemu_s390_flic_dequeue_service(QEMUS390FLICState *flic) { uint32_t tmp; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); g_assert(flic->pending & FLIC_PENDING_SERVICE); tmp = flic->service_param; flic->service_param = 0; @@ -238,7 +238,7 @@ QEMUS390FlicIO *qemu_s390_flic_dequeue_io(QEMUS390FLICState *flic, uint64_t cr6) QEMUS390FlicIO *io; uint8_t isc; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); if (!(flic->pending & CR6_TO_PENDING_IO(cr6))) { return NULL; } @@ -262,7 +262,7 @@ QEMUS390FlicIO *qemu_s390_flic_dequeue_io(QEMUS390FLICState *flic, uint64_t cr6) void qemu_s390_flic_dequeue_crw_mchk(QEMUS390FLICState *flic) { - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); g_assert(flic->pending & FLIC_PENDING_MCHK_CR); flic->pending &= ~FLIC_PENDING_MCHK_CR; } @@ -271,7 +271,7 @@ static void qemu_s390_inject_service(S390FLICState *fs, uint32_t parm) { QEMUS390FLICState *flic = s390_get_qemu_flic(fs); - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); /* multiplexing is good enough for sclp - kvm does it internally as well */ flic->service_param |= parm; flic->pending |= FLIC_PENDING_SERVICE; @@ -287,7 +287,7 @@ static void qemu_s390_inject_io(S390FLICState *fs, uint16_t subchannel_id, QEMUS390FLICState *flic = s390_get_qemu_flic(fs); QEMUS390FlicIO *io; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); io = g_new0(QEMUS390FlicIO, 1); io->id = subchannel_id; io->nr = subchannel_nr; @@ -304,7 +304,7 @@ static void qemu_s390_inject_crw_mchk(S390FLICState *fs) { QEMUS390FLICState *flic = s390_get_qemu_flic(fs); - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); flic->pending |= FLIC_PENDING_MCHK_CR; qemu_s390_flic_notify(FLIC_PENDING_MCHK_CR); @@ -330,7 +330,7 @@ bool qemu_s390_flic_has_crw_mchk(QEMUS390FLICState *flic) bool qemu_s390_flic_has_any(QEMUS390FLICState *flic) { - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); return !!flic->pending; } @@ -340,7 +340,7 @@ static void qemu_s390_flic_reset(DeviceState *dev) QEMUS390FlicIO *cur, *next; int isc; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); flic->simm = 0; flic->nimm = 0; flic->pending = 0; diff --git a/hw/misc/edu.c b/hw/misc/edu.c index a1f8bc77e7..fa05bdd4f3 100644 --- a/hw/misc/edu.c +++ b/hw/misc/edu.c @@ -355,9 +355,9 @@ static void *edu_fact_thread(void *opaque) smp_mb__after_rmw(); if (qatomic_read(&edu->status) & EDU_STATUS_IRQFACT) { - qemu_mutex_lock_iothread(); + bql_lock(); edu_raise_irq(edu, FACT_IRQ); - qemu_mutex_unlock_iothread(); + bql_unlock(); } } diff --git a/hw/misc/imx6_src.c b/hw/misc/imx6_src.c index a9c64d06eb..2b9bb07540 100644 --- a/hw/misc/imx6_src.c +++ b/hw/misc/imx6_src.c @@ -131,7 +131,7 @@ static void imx6_clear_reset_bit(CPUState *cpu, run_on_cpu_data data) struct SRCSCRResetInfo *ri = data.host_ptr; IMX6SRCState *s = ri->s; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); s->regs[SRC_SCR] = deposit32(s->regs[SRC_SCR], ri->reset_bit, 1, 0); DPRINTF("reg[%s] <= 0x%" PRIx32 "\n", diff --git a/hw/misc/imx7_src.c b/hw/misc/imx7_src.c index 983251e86f..77ad7a7eef 100644 --- a/hw/misc/imx7_src.c +++ b/hw/misc/imx7_src.c @@ -136,7 +136,7 @@ static void imx7_clear_reset_bit(CPUState *cpu, run_on_cpu_data data) struct SRCSCRResetInfo *ri = data.host_ptr; IMX7SRCState *s = ri->s; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); s->regs[SRC_A7RCR0] = deposit32(s->regs[SRC_A7RCR0], ri->reset_bit, 1, 0); diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c index 1e2b3baeb1..453fdb9819 100644 --- a/hw/net/xen_nic.c +++ b/hw/net/xen_nic.c @@ -133,7 +133,7 @@ static bool net_tx_packets(struct XenNetDev *netdev) void *page; void *tmpbuf = NULL; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); for (;;) { rc = netdev->tx_ring.req_cons; @@ -260,7 +260,7 @@ static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t size RING_IDX rc, rp; void *page; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); if (xen_device_backend_get_state(&netdev->xendev) != XenbusStateConnected) { return -1; @@ -354,7 +354,7 @@ static bool xen_netdev_connect(XenDevice *xendev, Error **errp) XenNetDev *netdev = XEN_NET_DEVICE(xendev); unsigned int port, rx_copy; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); if (xen_device_frontend_scanf(xendev, "tx-ring-ref", "%u", &netdev->tx_ring_ref) != 1) { @@ -425,7 +425,7 @@ static void xen_netdev_disconnect(XenDevice *xendev, Error **errp) trace_xen_netdev_disconnect(netdev->dev); - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); netdev->tx_ring.sring = NULL; netdev->rx_ring.sring = NULL; diff --git a/hw/ppc/pegasos2.c b/hw/ppc/pegasos2.c index 3203a4a728..d84f3f977d 100644 --- a/hw/ppc/pegasos2.c +++ b/hw/ppc/pegasos2.c @@ -515,7 +515,7 @@ static void pegasos2_hypercall(PPCVirtualHypervisor *vhyp, PowerPCCPU *cpu) CPUPPCState *env = &cpu->env; /* The TCG path should also be holding the BQL at this point */ - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); if (FIELD_EX64(env->msr, MSR, PR)) { qemu_log_mask(LOG_GUEST_ERROR, "Hypercall made with MSR[PR]=1\n"); diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c index be167710a3..b6581c16fc 100644 --- a/hw/ppc/ppc.c +++ b/hw/ppc/ppc.c @@ -314,7 +314,7 @@ void store_40x_dbcr0(CPUPPCState *env, uint32_t val) { PowerPCCPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); switch ((val >> 28) & 0x3) { case 0x0: @@ -334,7 +334,7 @@ void store_40x_dbcr0(CPUPPCState *env, uint32_t val) break; } - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* PowerPC 40x internal IRQ controller */ diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index df09aa9d6a..0620912f9c 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1304,7 +1304,7 @@ static void emulate_spapr_hypercall(PPCVirtualHypervisor *vhyp, CPUPPCState *env = &cpu->env; /* The TCG path should also be holding the BQL at this point */ - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); g_assert(!vhyp_cpu_in_nested(cpu)); diff --git a/hw/ppc/spapr_rng.c b/hw/ppc/spapr_rng.c index df5c4b9687..c2fda7ad20 100644 --- a/hw/ppc/spapr_rng.c +++ b/hw/ppc/spapr_rng.c @@ -82,9 +82,9 @@ static target_ulong h_random(PowerPCCPU *cpu, SpaprMachineState *spapr, while (hrdata.received < 8) { rng_backend_request_entropy(rngstate->backend, 8 - hrdata.received, random_recv, &hrdata); - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_sem_wait(&hrdata.sem); - qemu_mutex_lock_iothread(); + bql_lock(); } qemu_sem_destroy(&hrdata.sem); diff --git a/hw/ppc/spapr_softmmu.c b/hw/ppc/spapr_softmmu.c index 278666317e..fc1bbc0b61 100644 --- a/hw/ppc/spapr_softmmu.c +++ b/hw/ppc/spapr_softmmu.c @@ -334,7 +334,7 @@ static void *hpt_prepare_thread(void *opaque) pending->ret = H_NO_MEM; } - qemu_mutex_lock_iothread(); + bql_lock(); if (SPAPR_MACHINE(qdev_get_machine())->pending_hpt == pending) { /* Ready to go */ @@ -344,7 +344,7 @@ static void *hpt_prepare_thread(void *opaque) free_pending_hpt(pending); } - qemu_mutex_unlock_iothread(); + bql_unlock(); return NULL; } diff --git a/hw/remote/mpqemu-link.c b/hw/remote/mpqemu-link.c index 9bd98e8219..d04ac93621 100644 --- a/hw/remote/mpqemu-link.c +++ b/hw/remote/mpqemu-link.c @@ -33,7 +33,7 @@ */ bool mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, Error **errp) { - bool iolock = qemu_mutex_iothread_locked(); + bool drop_bql = bql_locked(); bool iothread = qemu_in_iothread(); struct iovec send[2] = {}; int *fds = NULL; @@ -63,8 +63,8 @@ bool mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, Error **errp) * for IOThread case. * Also skip lock handling while in a co-routine in the main context. */ - if (iolock && !iothread && !qemu_in_coroutine()) { - qemu_mutex_unlock_iothread(); + if (drop_bql && !iothread && !qemu_in_coroutine()) { + bql_unlock(); } if (!qio_channel_writev_full_all(ioc, send, G_N_ELEMENTS(send), @@ -74,9 +74,9 @@ bool mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, Error **errp) trace_mpqemu_send_io_error(msg->cmd, msg->size, nfds); } - if (iolock && !iothread && !qemu_in_coroutine()) { + if (drop_bql && !iothread && !qemu_in_coroutine()) { /* See above comment why skip locking here. */ - qemu_mutex_lock_iothread(); + bql_lock(); } return ret; @@ -96,7 +96,7 @@ static ssize_t mpqemu_read(QIOChannel *ioc, void *buf, size_t len, int **fds, size_t *nfds, Error **errp) { struct iovec iov = { .iov_base = buf, .iov_len = len }; - bool iolock = qemu_mutex_iothread_locked(); + bool drop_bql = bql_locked(); bool iothread = qemu_in_iothread(); int ret = -1; @@ -106,14 +106,14 @@ static ssize_t mpqemu_read(QIOChannel *ioc, void *buf, size_t len, int **fds, */ assert(qemu_in_coroutine() || !iothread); - if (iolock && !iothread && !qemu_in_coroutine()) { - qemu_mutex_unlock_iothread(); + if (drop_bql && !iothread && !qemu_in_coroutine()) { + bql_unlock(); } ret = qio_channel_readv_full_all_eof(ioc, &iov, 1, fds, nfds, errp); - if (iolock && !iothread && !qemu_in_coroutine()) { - qemu_mutex_lock_iothread(); + if (drop_bql && !iothread && !qemu_in_coroutine()) { + bql_lock(); } return (ret <= 0) ? ret : iov.iov_len; diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index 8b10c32a3c..d9b879e056 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -400,7 +400,7 @@ static int vfu_object_mr_rw(MemoryRegion *mr, uint8_t *buf, hwaddr offset, } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); release_lock = false; } diff --git a/hw/s390x/s390-skeys.c b/hw/s390x/s390-skeys.c index 8f5159d85d..5c535d483e 100644 --- a/hw/s390x/s390-skeys.c +++ b/hw/s390x/s390-skeys.c @@ -153,7 +153,7 @@ void qmp_dump_skeys(const char *filename, Error **errp) goto out; } - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); guest_phys_blocks_init(&guest_phys_blocks); guest_phys_blocks_append(&guest_phys_blocks); diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 24347ab0f7..92e031b6fa 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -774,7 +774,7 @@ static void dirty_bitmap_state_pending(void *opaque, SaveBitmapState *dbms; uint64_t pending = 0; - qemu_mutex_lock_iothread(); + bql_lock(); QSIMPLEQ_FOREACH(dbms, &s->dbms_list, entry) { uint64_t gran = bdrv_dirty_bitmap_granularity(dbms->bitmap); @@ -784,7 +784,7 @@ static void dirty_bitmap_state_pending(void *opaque, pending += DIV_ROUND_UP(sectors * BDRV_SECTOR_SIZE, gran); } - qemu_mutex_unlock_iothread(); + bql_unlock(); trace_dirty_bitmap_state_pending(pending); diff --git a/migration/block.c b/migration/block.c index a15f9bddcb..4a675b92bc 100644 --- a/migration/block.c +++ b/migration/block.c @@ -269,7 +269,7 @@ static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds) int64_t count; if (bmds->shared_base) { - qemu_mutex_lock_iothread(); + bql_lock(); aio_context_acquire(blk_get_aio_context(bb)); /* Skip unallocated sectors; intentionally treats failure or * partial sector as an allocated sector */ @@ -282,7 +282,7 @@ static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds) cur_sector += count >> BDRV_SECTOR_BITS; } aio_context_release(blk_get_aio_context(bb)); - qemu_mutex_unlock_iothread(); + bql_unlock(); } if (cur_sector >= total_sectors) { @@ -321,14 +321,14 @@ static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds) * This is ugly and will disappear when we make bdrv_* thread-safe, * without the need to acquire the AioContext. */ - qemu_mutex_lock_iothread(); + bql_lock(); aio_context_acquire(blk_get_aio_context(bmds->blk)); bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, cur_sector * BDRV_SECTOR_SIZE, nr_sectors * BDRV_SECTOR_SIZE); blk->aiocb = blk_aio_preadv(bb, cur_sector * BDRV_SECTOR_SIZE, &blk->qiov, 0, blk_mig_read_cb, blk); aio_context_release(blk_get_aio_context(bmds->blk)); - qemu_mutex_unlock_iothread(); + bql_unlock(); bmds->cur_sector = cur_sector + nr_sectors; return (bmds->cur_sector >= total_sectors); @@ -786,9 +786,9 @@ static int block_save_iterate(QEMUFile *f, void *opaque) /* Always called with iothread lock taken for * simplicity, block_save_complete also calls it. */ - qemu_mutex_lock_iothread(); + bql_lock(); ret = blk_mig_save_dirty_block(f, 1); - qemu_mutex_unlock_iothread(); + bql_unlock(); } if (ret < 0) { return ret; @@ -860,9 +860,9 @@ static void block_state_pending(void *opaque, uint64_t *must_precopy, /* Estimate pending number of bytes to send */ uint64_t pending; - qemu_mutex_lock_iothread(); + bql_lock(); pending = get_remaining_dirty(); - qemu_mutex_unlock_iothread(); + bql_unlock(); blk_mig_lock(); pending += block_mig_state.submitted * BLK_MIG_BLOCK_SIZE + diff --git a/migration/colo.c b/migration/colo.c index 4447e34914..2a74efdd77 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -420,13 +420,13 @@ static int colo_do_checkpoint_transaction(MigrationState *s, qio_channel_io_seek(QIO_CHANNEL(bioc), 0, 0, NULL); bioc->usage = 0; - qemu_mutex_lock_iothread(); + bql_lock(); if (failover_get_state() != FAILOVER_STATUS_NONE) { - qemu_mutex_unlock_iothread(); + bql_unlock(); goto out; } vm_stop_force_state(RUN_STATE_COLO); - qemu_mutex_unlock_iothread(); + bql_unlock(); trace_colo_vm_state_change("run", "stop"); /* * Failover request bh could be called after vm_stop_force_state(), @@ -435,23 +435,23 @@ static int colo_do_checkpoint_transaction(MigrationState *s, if (failover_get_state() != FAILOVER_STATUS_NONE) { goto out; } - qemu_mutex_lock_iothread(); + bql_lock(); replication_do_checkpoint_all(&local_err); if (local_err) { - qemu_mutex_unlock_iothread(); + bql_unlock(); goto out; } colo_send_message(s->to_dst_file, COLO_MESSAGE_VMSTATE_SEND, &local_err); if (local_err) { - qemu_mutex_unlock_iothread(); + bql_unlock(); goto out; } /* Note: device state is saved into buffer */ ret = qemu_save_device_state(fb); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (ret < 0) { goto out; } @@ -504,9 +504,9 @@ static int colo_do_checkpoint_transaction(MigrationState *s, ret = 0; - qemu_mutex_lock_iothread(); + bql_lock(); vm_start(); - qemu_mutex_unlock_iothread(); + bql_unlock(); trace_colo_vm_state_change("stop", "run"); out: @@ -557,15 +557,15 @@ static void colo_process_checkpoint(MigrationState *s) fb = qemu_file_new_output(QIO_CHANNEL(bioc)); object_unref(OBJECT(bioc)); - qemu_mutex_lock_iothread(); + bql_lock(); replication_start_all(REPLICATION_MODE_PRIMARY, &local_err); if (local_err) { - qemu_mutex_unlock_iothread(); + bql_unlock(); goto out; } vm_start(); - qemu_mutex_unlock_iothread(); + bql_unlock(); trace_colo_vm_state_change("stop", "run"); timer_mod(s->colo_delay_timer, qemu_clock_get_ms(QEMU_CLOCK_HOST) + @@ -639,14 +639,14 @@ out: void migrate_start_colo_process(MigrationState *s) { - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_event_init(&s->colo_checkpoint_event, false); s->colo_delay_timer = timer_new_ms(QEMU_CLOCK_HOST, colo_checkpoint_notify, s); qemu_sem_init(&s->colo_exit_sem, 0); colo_process_checkpoint(s); - qemu_mutex_lock_iothread(); + bql_lock(); } static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, @@ -657,9 +657,9 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, Error *local_err = NULL; int ret; - qemu_mutex_lock_iothread(); + bql_lock(); vm_stop_force_state(RUN_STATE_COLO); - qemu_mutex_unlock_iothread(); + bql_unlock(); trace_colo_vm_state_change("run", "stop"); /* FIXME: This is unnecessary for periodic checkpoint mode */ @@ -677,10 +677,10 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, return; } - qemu_mutex_lock_iothread(); + bql_lock(); cpu_synchronize_all_states(); ret = qemu_loadvm_state_main(mis->from_src_file, mis); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (ret < 0) { error_setg(errp, "Load VM's live state (ram) error"); @@ -719,14 +719,14 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, return; } - qemu_mutex_lock_iothread(); + bql_lock(); vmstate_loading = true; colo_flush_ram_cache(); ret = qemu_load_device_state(fb); if (ret < 0) { error_setg(errp, "COLO: load device state failed"); vmstate_loading = false; - qemu_mutex_unlock_iothread(); + bql_unlock(); return; } @@ -734,7 +734,7 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, if (local_err) { error_propagate(errp, local_err); vmstate_loading = false; - qemu_mutex_unlock_iothread(); + bql_unlock(); return; } @@ -743,7 +743,7 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, if (local_err) { error_propagate(errp, local_err); vmstate_loading = false; - qemu_mutex_unlock_iothread(); + bql_unlock(); return; } /* Notify all filters of all NIC to do checkpoint */ @@ -752,13 +752,13 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, if (local_err) { error_propagate(errp, local_err); vmstate_loading = false; - qemu_mutex_unlock_iothread(); + bql_unlock(); return; } vmstate_loading = false; vm_start(); - qemu_mutex_unlock_iothread(); + bql_unlock(); trace_colo_vm_state_change("stop", "run"); if (failover_get_state() == FAILOVER_STATUS_RELAUNCH) { @@ -851,14 +851,14 @@ static void *colo_process_incoming_thread(void *opaque) fb = qemu_file_new_input(QIO_CHANNEL(bioc)); object_unref(OBJECT(bioc)); - qemu_mutex_lock_iothread(); + bql_lock(); replication_start_all(REPLICATION_MODE_SECONDARY, &local_err); if (local_err) { - qemu_mutex_unlock_iothread(); + bql_unlock(); goto out; } vm_start(); - qemu_mutex_unlock_iothread(); + bql_unlock(); trace_colo_vm_state_change("stop", "run"); colo_send_message(mis->to_src_file, COLO_MESSAGE_CHECKPOINT_READY, @@ -920,7 +920,7 @@ int coroutine_fn colo_incoming_co(void) Error *local_err = NULL; QemuThread th; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); if (!migration_incoming_colo_enabled()) { return 0; @@ -940,10 +940,10 @@ int coroutine_fn colo_incoming_co(void) qemu_coroutine_yield(); mis->colo_incoming_co = NULL; - qemu_mutex_unlock_iothread(); + bql_unlock(); /* Wait checkpoint incoming thread exit before free resource */ qemu_thread_join(&th); - qemu_mutex_lock_iothread(); + bql_lock(); /* We hold the global iothread lock, so it is safe here */ colo_release_ram_cache(); diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index 036ac017fc..429d10c4d9 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -90,13 +90,13 @@ static int64_t do_calculate_dirtyrate(DirtyPageRecord dirty_pages, void global_dirty_log_change(unsigned int flag, bool start) { - qemu_mutex_lock_iothread(); + bql_lock(); if (start) { memory_global_dirty_log_start(flag); } else { memory_global_dirty_log_stop(flag); } - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* @@ -106,12 +106,12 @@ void global_dirty_log_change(unsigned int flag, bool start) */ static void global_dirty_log_sync(unsigned int flag, bool one_shot) { - qemu_mutex_lock_iothread(); + bql_lock(); memory_global_dirty_log_sync(false); if (one_shot) { memory_global_dirty_log_stop(flag); } - qemu_mutex_unlock_iothread(); + bql_unlock(); } static DirtyPageRecord *vcpu_dirty_stat_alloc(VcpuStat *stat) @@ -610,7 +610,7 @@ static void calculate_dirtyrate_dirty_bitmap(struct DirtyRateConfig config) int64_t start_time; DirtyPageRecord dirty_pages; - qemu_mutex_lock_iothread(); + bql_lock(); memory_global_dirty_log_start(GLOBAL_DIRTY_DIRTY_RATE); /* @@ -627,7 +627,7 @@ static void calculate_dirtyrate_dirty_bitmap(struct DirtyRateConfig config) * KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE cap is enabled. */ dirtyrate_manual_reset_protect(); - qemu_mutex_unlock_iothread(); + bql_unlock(); record_dirtypages_bitmap(&dirty_pages, true); diff --git a/migration/migration.c b/migration/migration.c index 3ce04b2aaf..be74c714d6 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -1294,12 +1294,12 @@ static void migrate_fd_cleanup(MigrationState *s) QEMUFile *tmp; trace_migrate_fd_cleanup(); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (s->migration_thread_running) { qemu_thread_join(&s->thread); s->migration_thread_running = false; } - qemu_mutex_lock_iothread(); + bql_lock(); multifd_save_cleanup(); qemu_mutex_lock(&s->qemu_file_lock); @@ -2411,7 +2411,7 @@ static int postcopy_start(MigrationState *ms, Error **errp) } trace_postcopy_start(); - qemu_mutex_lock_iothread(); + bql_lock(); trace_postcopy_start_set_run(); migration_downtime_start(ms); @@ -2520,7 +2520,7 @@ static int postcopy_start(MigrationState *ms, Error **errp) migration_downtime_end(ms); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (migrate_postcopy_ram()) { /* @@ -2561,7 +2561,7 @@ fail: error_report_err(local_err); } } - qemu_mutex_unlock_iothread(); + bql_unlock(); return -1; } @@ -2595,14 +2595,14 @@ static int migration_maybe_pause(MigrationState *s, * wait for the 'pause_sem' semaphore. */ if (s->state != MIGRATION_STATUS_CANCELLING) { - qemu_mutex_unlock_iothread(); + bql_unlock(); migrate_set_state(&s->state, *current_active_state, MIGRATION_STATUS_PRE_SWITCHOVER); qemu_sem_wait(&s->pause_sem); migrate_set_state(&s->state, MIGRATION_STATUS_PRE_SWITCHOVER, new_state); *current_active_state = new_state; - qemu_mutex_lock_iothread(); + bql_lock(); } return s->state == new_state ? 0 : -EINVAL; @@ -2613,7 +2613,7 @@ static int migration_completion_precopy(MigrationState *s, { int ret; - qemu_mutex_lock_iothread(); + bql_lock(); migration_downtime_start(s); qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); @@ -2641,7 +2641,7 @@ static int migration_completion_precopy(MigrationState *s, ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, s->block_inactive); out_unlock: - qemu_mutex_unlock_iothread(); + bql_unlock(); return ret; } @@ -2649,9 +2649,9 @@ static void migration_completion_postcopy(MigrationState *s) { trace_migration_completion_postcopy_end(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_savevm_state_complete_postcopy(s->to_dst_file); - qemu_mutex_unlock_iothread(); + bql_unlock(); /* * Shutdown the postcopy fast path thread. This is only needed when dest @@ -2675,14 +2675,14 @@ static void migration_completion_failed(MigrationState *s, */ Error *local_err = NULL; - qemu_mutex_lock_iothread(); + bql_lock(); bdrv_activate_all(&local_err); if (local_err) { error_report_err(local_err); } else { s->block_inactive = false; } - qemu_mutex_unlock_iothread(); + bql_unlock(); } migrate_set_state(&s->state, current_active_state, @@ -3122,7 +3122,7 @@ static void migration_iteration_finish(MigrationState *s) /* If we enabled cpu throttling for auto-converge, turn it off. */ cpu_throttle_stop(); - qemu_mutex_lock_iothread(); + bql_lock(); switch (s->state) { case MIGRATION_STATUS_COMPLETED: migration_calculate_complete(s); @@ -3153,7 +3153,7 @@ static void migration_iteration_finish(MigrationState *s) break; } migrate_fd_cleanup_schedule(s); - qemu_mutex_unlock_iothread(); + bql_unlock(); } static void bg_migration_iteration_finish(MigrationState *s) @@ -3165,7 +3165,7 @@ static void bg_migration_iteration_finish(MigrationState *s) */ ram_write_tracking_stop(); - qemu_mutex_lock_iothread(); + bql_lock(); switch (s->state) { case MIGRATION_STATUS_COMPLETED: migration_calculate_complete(s); @@ -3184,7 +3184,7 @@ static void bg_migration_iteration_finish(MigrationState *s) } migrate_fd_cleanup_schedule(s); - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* @@ -3306,9 +3306,9 @@ static void *migration_thread(void *opaque) object_ref(OBJECT(s)); update_iteration_initial_status(s); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_savevm_state_header(s->to_dst_file); - qemu_mutex_unlock_iothread(); + bql_unlock(); /* * If we opened the return path, we need to make sure dst has it @@ -3336,9 +3336,9 @@ static void *migration_thread(void *opaque) qemu_savevm_send_colo_enable(s->to_dst_file); } - qemu_mutex_lock_iothread(); + bql_lock(); qemu_savevm_state_setup(s->to_dst_file); - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); @@ -3449,10 +3449,10 @@ static void *bg_migration_thread(void *opaque) ram_write_tracking_prepare(); #endif - qemu_mutex_lock_iothread(); + bql_lock(); qemu_savevm_state_header(s->to_dst_file); qemu_savevm_state_setup(s->to_dst_file); - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); @@ -3462,7 +3462,7 @@ static void *bg_migration_thread(void *opaque) trace_migration_thread_setup_complete(); migration_downtime_start(s); - qemu_mutex_lock_iothread(); + bql_lock(); /* * If VM is currently in suspended state, then, to make a valid runstate @@ -3505,7 +3505,7 @@ static void *bg_migration_thread(void *opaque) s->vm_start_bh = qemu_bh_new(bg_migration_vm_start_bh, s); qemu_bh_schedule(s->vm_start_bh); - qemu_mutex_unlock_iothread(); + bql_unlock(); while (migration_is_active(s)) { MigIterateState iter_state = bg_migration_iteration_run(s); @@ -3534,7 +3534,7 @@ fail: if (early_fail) { migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_FAILED); - qemu_mutex_unlock_iothread(); + bql_unlock(); } bg_migration_iteration_finish(s); diff --git a/migration/ram.c b/migration/ram.c index 8c7886ab79..08dc7e2909 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2984,9 +2984,9 @@ static int ram_save_setup(QEMUFile *f, void *opaque) migration_ops = g_malloc0(sizeof(MigrationOps)); migration_ops->ram_save_target_page = ram_save_target_page_legacy; - qemu_mutex_unlock_iothread(); + bql_unlock(); ret = multifd_send_sync_main(f); - qemu_mutex_lock_iothread(); + bql_lock(); if (ret < 0) { return ret; } @@ -3221,11 +3221,11 @@ static void ram_state_pending_exact(void *opaque, uint64_t *must_precopy, uint64_t remaining_size = rs->migration_dirty_pages * TARGET_PAGE_SIZE; if (!migration_in_postcopy() && remaining_size < s->threshold_size) { - qemu_mutex_lock_iothread(); + bql_lock(); WITH_RCU_READ_LOCK_GUARD() { migration_bitmap_sync_precopy(rs, false); } - qemu_mutex_unlock_iothread(); + bql_unlock(); remaining_size = rs->migration_dirty_pages * TARGET_PAGE_SIZE; } @@ -3453,7 +3453,7 @@ void colo_incoming_start_dirty_log(void) { RAMBlock *block = NULL; /* For memory_global_dirty_log_start below. */ - qemu_mutex_lock_iothread(); + bql_lock(); qemu_mutex_lock_ramlist(); memory_global_dirty_log_sync(false); @@ -3467,7 +3467,7 @@ void colo_incoming_start_dirty_log(void) } ram_state->migration_dirty_pages = 0; qemu_mutex_unlock_ramlist(); - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* It is need to hold the global lock to call this helper */ diff --git a/replay/replay-internal.c b/replay/replay-internal.c index 77d0c82327..3e08e381cb 100644 --- a/replay/replay-internal.c +++ b/replay/replay-internal.c @@ -216,7 +216,7 @@ void replay_mutex_lock(void) { if (replay_mode != REPLAY_MODE_NONE) { unsigned long id; - g_assert(!qemu_mutex_iothread_locked()); + g_assert(!bql_locked()); g_assert(!replay_mutex_locked()); qemu_mutex_lock(&lock); id = mutex_tail++; diff --git a/semihosting/console.c b/semihosting/console.c index 5d61e8207e..60102bbab6 100644 --- a/semihosting/console.c +++ b/semihosting/console.c @@ -43,7 +43,7 @@ static SemihostingConsole console; static int console_can_read(void *opaque) { SemihostingConsole *c = opaque; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); return (int)fifo8_num_free(&c->fifo); } @@ -58,7 +58,7 @@ static void console_wake_up(gpointer data, gpointer user_data) static void console_read(void *opaque, const uint8_t *buf, int size) { SemihostingConsole *c = opaque; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); while (size-- && !fifo8_is_full(&c->fifo)) { fifo8_push(&c->fifo, *buf++); } @@ -70,7 +70,7 @@ bool qemu_semihosting_console_ready(void) { SemihostingConsole *c = &console; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); return !fifo8_is_empty(&c->fifo); } @@ -78,7 +78,7 @@ void qemu_semihosting_console_block_until_ready(CPUState *cs) { SemihostingConsole *c = &console; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); /* Block if the fifo is completely empty. */ if (fifo8_is_empty(&c->fifo)) { diff --git a/stubs/iothread-lock.c b/stubs/iothread-lock.c index 5b45b7fc8b..d7890e5581 100644 --- a/stubs/iothread-lock.c +++ b/stubs/iothread-lock.c @@ -1,15 +1,15 @@ #include "qemu/osdep.h" #include "qemu/main-loop.h" -bool qemu_mutex_iothread_locked(void) +bool bql_locked(void) { return false; } -void qemu_mutex_lock_iothread_impl(const char *file, int line) +void bql_lock_impl(const char *file, int line) { } -void qemu_mutex_unlock_iothread(void) +void bql_unlock(void) { } diff --git a/system/cpu-throttle.c b/system/cpu-throttle.c index d9bb30a223..786a9a5639 100644 --- a/system/cpu-throttle.c +++ b/system/cpu-throttle.c @@ -57,9 +57,9 @@ static void cpu_throttle_thread(CPUState *cpu, run_on_cpu_data opaque) qemu_cond_timedwait_iothread(cpu->halt_cond, sleeptime_ns / SCALE_MS); } else { - qemu_mutex_unlock_iothread(); + bql_unlock(); g_usleep(sleeptime_ns / SCALE_US); - qemu_mutex_lock_iothread(); + bql_lock(); } sleeptime_ns = endtime_ns - qemu_clock_get_ns(QEMU_CLOCK_REALTIME); } diff --git a/system/cpus.c b/system/cpus.c index a444a747f0..9b68dc9c7c 100644 --- a/system/cpus.c +++ b/system/cpus.c @@ -65,7 +65,8 @@ #endif /* CONFIG_LINUX */ -static QemuMutex qemu_global_mutex; +/* The Big QEMU Lock (BQL) */ +static QemuMutex bql; /* * The chosen accelerator is supposed to register this. @@ -389,14 +390,14 @@ void qemu_init_cpu_loop(void) qemu_init_sigbus(); qemu_cond_init(&qemu_cpu_cond); qemu_cond_init(&qemu_pause_cond); - qemu_mutex_init(&qemu_global_mutex); + qemu_mutex_init(&bql); qemu_thread_get_self(&io_thread); } void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data) { - do_run_on_cpu(cpu, func, data, &qemu_global_mutex); + do_run_on_cpu(cpu, func, data, &bql); } static void qemu_cpu_stop(CPUState *cpu, bool exit) @@ -428,7 +429,7 @@ void qemu_wait_io_event(CPUState *cpu) slept = true; qemu_plugin_vcpu_idle_cb(cpu); } - qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); + qemu_cond_wait(cpu->halt_cond, &bql); } if (slept) { qemu_plugin_vcpu_resume_cb(cpu); @@ -481,46 +482,46 @@ bool qemu_in_vcpu_thread(void) return current_cpu && qemu_cpu_is_self(current_cpu); } -QEMU_DEFINE_STATIC_CO_TLS(bool, iothread_locked) +QEMU_DEFINE_STATIC_CO_TLS(bool, bql_locked) -bool qemu_mutex_iothread_locked(void) +bool bql_locked(void) { - return get_iothread_locked(); + return get_bql_locked(); } bool qemu_in_main_thread(void) { - return qemu_mutex_iothread_locked(); + return bql_locked(); } /* * The BQL is taken from so many places that it is worth profiling the * callers directly, instead of funneling them all through a single function. */ -void qemu_mutex_lock_iothread_impl(const char *file, int line) +void bql_lock_impl(const char *file, int line) { - QemuMutexLockFunc bql_lock = qatomic_read(&qemu_bql_mutex_lock_func); + QemuMutexLockFunc bql_lock_fn = qatomic_read(&bql_mutex_lock_func); - g_assert(!qemu_mutex_iothread_locked()); - bql_lock(&qemu_global_mutex, file, line); - set_iothread_locked(true); + g_assert(!bql_locked()); + bql_lock_fn(&bql, file, line); + set_bql_locked(true); } -void qemu_mutex_unlock_iothread(void) +void bql_unlock(void) { - g_assert(qemu_mutex_iothread_locked()); - set_iothread_locked(false); - qemu_mutex_unlock(&qemu_global_mutex); + g_assert(bql_locked()); + set_bql_locked(false); + qemu_mutex_unlock(&bql); } void qemu_cond_wait_iothread(QemuCond *cond) { - qemu_cond_wait(cond, &qemu_global_mutex); + qemu_cond_wait(cond, &bql); } void qemu_cond_timedwait_iothread(QemuCond *cond, int ms) { - qemu_cond_timedwait(cond, &qemu_global_mutex, ms); + qemu_cond_timedwait(cond, &bql, ms); } /* signal CPU creation */ @@ -571,15 +572,15 @@ void pause_all_vcpus(void) replay_mutex_unlock(); while (!all_vcpus_paused()) { - qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); + qemu_cond_wait(&qemu_pause_cond, &bql); CPU_FOREACH(cpu) { qemu_cpu_kick(cpu); } } - qemu_mutex_unlock_iothread(); + bql_unlock(); replay_mutex_lock(); - qemu_mutex_lock_iothread(); + bql_lock(); } void cpu_resume(CPUState *cpu) @@ -608,9 +609,9 @@ void cpu_remove_sync(CPUState *cpu) cpu->stop = true; cpu->unplug = true; qemu_cpu_kick(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_thread_join(cpu->thread); - qemu_mutex_lock_iothread(); + bql_lock(); } void cpus_register_accel(const AccelOpsClass *ops) @@ -649,7 +650,7 @@ void qemu_init_vcpu(CPUState *cpu) cpus_accel->create_vcpu_thread(cpu); while (!cpu->created) { - qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); + qemu_cond_wait(&qemu_cpu_cond, &bql); } } diff --git a/system/dirtylimit.c b/system/dirtylimit.c index 495c7a7082..b5607eb8c2 100644 --- a/system/dirtylimit.c +++ b/system/dirtylimit.c @@ -148,9 +148,9 @@ void vcpu_dirty_rate_stat_stop(void) { qatomic_set(&vcpu_dirty_rate_stat->running, 0); dirtylimit_state_unlock(); - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_thread_join(&vcpu_dirty_rate_stat->thread); - qemu_mutex_lock_iothread(); + bql_lock(); dirtylimit_state_lock(); } diff --git a/system/memory.c b/system/memory.c index 798b6c0a17..7a9dc43c2d 100644 --- a/system/memory.c +++ b/system/memory.c @@ -1119,7 +1119,7 @@ void memory_region_transaction_commit(void) AddressSpace *as; assert(memory_region_transaction_depth); - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); --memory_region_transaction_depth; if (!memory_region_transaction_depth) { diff --git a/system/physmem.c b/system/physmem.c index a63853a7bc..4937e67bad 100644 --- a/system/physmem.c +++ b/system/physmem.c @@ -2639,8 +2639,8 @@ bool prepare_mmio_access(MemoryRegion *mr) { bool release_lock = false; - if (!qemu_mutex_iothread_locked()) { - qemu_mutex_lock_iothread(); + if (!bql_locked()) { + bql_lock(); release_lock = true; } if (mr->flush_coalesced_mmio) { @@ -2721,7 +2721,7 @@ static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr, } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); release_lock = false; } @@ -2799,7 +2799,7 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr, } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); release_lock = false; } diff --git a/system/runstate.c b/system/runstate.c index ea9d6c2a32..5833ba0675 100644 --- a/system/runstate.c +++ b/system/runstate.c @@ -810,7 +810,7 @@ void qemu_init_subsystems(void) qemu_init_cpu_list(); qemu_init_cpu_loop(); - qemu_mutex_lock_iothread(); + bql_lock(); atexit(qemu_run_exit_notifiers); diff --git a/system/watchpoint.c b/system/watchpoint.c index ba5ad13352..b76007ebf6 100644 --- a/system/watchpoint.c +++ b/system/watchpoint.c @@ -155,9 +155,9 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len, * Now raise the debug interrupt so that it will * trigger after the current instruction. */ - qemu_mutex_lock_iothread(); + bql_lock(); cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG); - qemu_mutex_unlock_iothread(); + bql_unlock(); return; } diff --git a/target/arm/arm-powerctl.c b/target/arm/arm-powerctl.c index c078849403..8850381565 100644 --- a/target/arm/arm-powerctl.c +++ b/target/arm/arm-powerctl.c @@ -88,7 +88,7 @@ static void arm_set_cpu_on_async_work(CPUState *target_cpu_state, g_free(info); /* Finally set the power status */ - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); target_cpu->power_state = PSCI_ON; } @@ -99,7 +99,7 @@ int arm_set_cpu_on(uint64_t cpuid, uint64_t entry, uint64_t context_id, ARMCPU *target_cpu; struct CpuOnInfo *info; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); DPRINTF("cpu %" PRId64 " (EL %d, %s) @ 0x%" PRIx64 " with R0 = 0x%" PRIx64 "\n", cpuid, target_el, target_aa64 ? "aarch64" : "aarch32", entry, @@ -196,7 +196,7 @@ static void arm_set_cpu_on_and_reset_async_work(CPUState *target_cpu_state, target_cpu_state->halted = 0; /* Finally set the power status */ - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); target_cpu->power_state = PSCI_ON; } @@ -205,7 +205,7 @@ int arm_set_cpu_on_and_reset(uint64_t cpuid) CPUState *target_cpu_state; ARMCPU *target_cpu; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); /* Retrieve the cpu we are powering up */ target_cpu_state = arm_get_cpu_by_id(cpuid); @@ -247,7 +247,7 @@ static void arm_set_cpu_off_async_work(CPUState *target_cpu_state, { ARMCPU *target_cpu = ARM_CPU(target_cpu_state); - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); target_cpu->power_state = PSCI_OFF; target_cpu_state->halted = 1; target_cpu_state->exception_index = EXCP_HLT; @@ -258,7 +258,7 @@ int arm_set_cpu_off(uint64_t cpuid) CPUState *target_cpu_state; ARMCPU *target_cpu; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); DPRINTF("cpu %" PRId64 "\n", cpuid); @@ -294,7 +294,7 @@ int arm_reset_cpu(uint64_t cpuid) CPUState *target_cpu_state; ARMCPU *target_cpu; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); DPRINTF("cpu %" PRId64 "\n", cpuid); diff --git a/target/arm/helper.c b/target/arm/helper.c index 2746d3fdac..4a978d1102 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -5831,7 +5831,7 @@ static void do_hcr_write(CPUARMState *env, uint64_t value, uint64_t valid_mask) * VFIQ are masked unless running at EL0 or EL1, and HCR * can only be written at EL2. */ - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); arm_cpu_update_virq(cpu); arm_cpu_update_vfiq(cpu); arm_cpu_update_vserr(cpu); @@ -11344,7 +11344,7 @@ void arm_cpu_do_interrupt(CPUState *cs) * BQL needs to be held for any modification of * cs->interrupt_request. */ - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); arm_call_pre_el_change_hook(cpu); diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index 757e13b0f9..f8dffb815f 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -1718,9 +1718,9 @@ static void hvf_wait_for_ipi(CPUState *cpu, struct timespec *ts) * sleeping. */ qatomic_set_mb(&cpu->thread_kicked, false); - qemu_mutex_unlock_iothread(); + bql_unlock(); pselect(0, 0, 0, 0, ts, &cpu->accel->unblock_ipi_mask); - qemu_mutex_lock_iothread(); + bql_lock(); } static void hvf_wfi(CPUState *cpu) @@ -1821,7 +1821,7 @@ int hvf_vcpu_exec(CPUState *cpu) flush_cpu_state(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); assert_hvf_ok(hv_vcpu_run(cpu->accel->fd)); /* handle VMEXIT */ @@ -1830,7 +1830,7 @@ int hvf_vcpu_exec(CPUState *cpu) uint32_t ec = syn_get_ec(syndrome); ret = 0; - qemu_mutex_lock_iothread(); + bql_lock(); switch (exit_reason) { case HV_EXIT_REASON_EXCEPTION: /* This is the main one, handle below. */ diff --git a/target/arm/kvm.c b/target/arm/kvm.c index 7903e2ddde..dcfe3d48ab 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -833,7 +833,7 @@ MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) if (run->s.regs.device_irq_level != cpu->device_irq_level) { switched_level = cpu->device_irq_level ^ run->s.regs.device_irq_level; - qemu_mutex_lock_iothread(); + bql_lock(); if (switched_level & KVM_ARM_DEV_EL1_VTIMER) { qemu_set_irq(cpu->gt_timer_outputs[GTIMER_VIRT], @@ -862,7 +862,7 @@ MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) /* We also mark unknown levels as processed to not waste cycles */ cpu->device_irq_level = run->s.regs.device_irq_level; - qemu_mutex_unlock_iothread(); + bql_unlock(); } return MEMTXATTRS_UNSPECIFIED; diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c index 3c175c93a7..498d77b8cf 100644 --- a/target/arm/kvm64.c +++ b/target/arm/kvm64.c @@ -1233,9 +1233,9 @@ bool kvm_arm_handle_debug(CPUState *cs, struct kvm_debug_exit_arch *debug_exit) env->exception.syndrome = debug_exit->hsr; env->exception.vaddress = debug_exit->far; env->exception.target_el = 1; - qemu_mutex_lock_iothread(); + bql_lock(); arm_cpu_do_interrupt(cs); - qemu_mutex_unlock_iothread(); + bql_unlock(); return false; } diff --git a/target/arm/ptw.c b/target/arm/ptw.c index 1762b058ae..0ecd3a36da 100644 --- a/target/arm/ptw.c +++ b/target/arm/ptw.c @@ -772,9 +772,9 @@ static uint64_t arm_casq_ptw(CPUARMState *env, uint64_t old_val, #if !TCG_OVERSIZED_GUEST # error "Unexpected configuration" #endif - bool locked = qemu_mutex_iothread_locked(); + bool locked = bql_locked(); if (!locked) { - qemu_mutex_lock_iothread(); + bql_lock(); } if (ptw->out_be) { cur_val = ldq_be_p(host); @@ -788,7 +788,7 @@ static uint64_t arm_casq_ptw(CPUARMState *env, uint64_t old_val, } } if (!locked) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif diff --git a/target/arm/tcg/helper-a64.c b/target/arm/tcg/helper-a64.c index 8ad84623d3..198b975f20 100644 --- a/target/arm/tcg/helper-a64.c +++ b/target/arm/tcg/helper-a64.c @@ -809,9 +809,9 @@ void HELPER(exception_return)(CPUARMState *env, uint64_t new_pc) goto illegal_return; } - qemu_mutex_lock_iothread(); + bql_lock(); arm_call_pre_el_change_hook(env_archcpu(env)); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (!return_to_aa64) { env->aarch64 = false; @@ -876,9 +876,9 @@ void HELPER(exception_return)(CPUARMState *env, uint64_t new_pc) */ aarch64_sve_change_el(env, cur_el, new_el, return_to_aa64); - qemu_mutex_lock_iothread(); + bql_lock(); arm_call_el_change_hook(env_archcpu(env)); - qemu_mutex_unlock_iothread(); + bql_unlock(); return; diff --git a/target/arm/tcg/m_helper.c b/target/arm/tcg/m_helper.c index a26adb75aa..d1f1e02acc 100644 --- a/target/arm/tcg/m_helper.c +++ b/target/arm/tcg/m_helper.c @@ -373,8 +373,8 @@ void HELPER(v7m_preserve_fp_state)(CPUARMState *env) bool ts = is_secure && (env->v7m.fpccr[M_REG_S] & R_V7M_FPCCR_TS_MASK); bool take_exception; - /* Take the iothread lock as we are going to touch the NVIC */ - qemu_mutex_lock_iothread(); + /* Take the BQL as we are going to touch the NVIC */ + bql_lock(); /* Check the background context had access to the FPU */ if (!v7m_cpacr_pass(env, is_secure, is_priv)) { @@ -428,7 +428,7 @@ void HELPER(v7m_preserve_fp_state)(CPUARMState *env) take_exception = !stacked_ok && armv7m_nvic_can_take_pending_exception(env->nvic); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (take_exception) { raise_exception_ra(env, EXCP_LAZYFP, 0, 1, GETPC()); diff --git a/target/arm/tcg/op_helper.c b/target/arm/tcg/op_helper.c index ea08936a85..34e706e0fd 100644 --- a/target/arm/tcg/op_helper.c +++ b/target/arm/tcg/op_helper.c @@ -427,9 +427,9 @@ void HELPER(cpsr_write_eret)(CPUARMState *env, uint32_t val) { uint32_t mask; - qemu_mutex_lock_iothread(); + bql_lock(); arm_call_pre_el_change_hook(env_archcpu(env)); - qemu_mutex_unlock_iothread(); + bql_unlock(); mask = aarch32_cpsr_valid_mask(env->features, &env_archcpu(env)->isar); cpsr_write(env, val, mask, CPSRWriteExceptionReturn); @@ -442,9 +442,9 @@ void HELPER(cpsr_write_eret)(CPUARMState *env, uint32_t val) env->regs[15] &= (env->thumb ? ~1 : ~3); arm_rebuild_hflags(env); - qemu_mutex_lock_iothread(); + bql_lock(); arm_call_el_change_hook(env_archcpu(env)); - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* Access to user mode registers from privileged modes. */ @@ -803,9 +803,9 @@ void HELPER(set_cp_reg)(CPUARMState *env, const void *rip, uint32_t value) const ARMCPRegInfo *ri = rip; if (ri->type & ARM_CP_IO) { - qemu_mutex_lock_iothread(); + bql_lock(); ri->writefn(env, ri, value); - qemu_mutex_unlock_iothread(); + bql_unlock(); } else { ri->writefn(env, ri, value); } @@ -817,9 +817,9 @@ uint32_t HELPER(get_cp_reg)(CPUARMState *env, const void *rip) uint32_t res; if (ri->type & ARM_CP_IO) { - qemu_mutex_lock_iothread(); + bql_lock(); res = ri->readfn(env, ri); - qemu_mutex_unlock_iothread(); + bql_unlock(); } else { res = ri->readfn(env, ri); } @@ -832,9 +832,9 @@ void HELPER(set_cp_reg64)(CPUARMState *env, const void *rip, uint64_t value) const ARMCPRegInfo *ri = rip; if (ri->type & ARM_CP_IO) { - qemu_mutex_lock_iothread(); + bql_lock(); ri->writefn(env, ri, value); - qemu_mutex_unlock_iothread(); + bql_unlock(); } else { ri->writefn(env, ri, value); } @@ -846,9 +846,9 @@ uint64_t HELPER(get_cp_reg64)(CPUARMState *env, const void *rip) uint64_t res; if (ri->type & ARM_CP_IO) { - qemu_mutex_lock_iothread(); + bql_lock(); res = ri->readfn(env, ri); - qemu_mutex_unlock_iothread(); + bql_unlock(); } else { res = ri->readfn(env, ri); } diff --git a/target/arm/tcg/psci.c b/target/arm/tcg/psci.c index 6c1239bb96..9080a91d9c 100644 --- a/target/arm/tcg/psci.c +++ b/target/arm/tcg/psci.c @@ -107,7 +107,7 @@ void arm_handle_psci_call(ARMCPU *cpu) } target_cpu = ARM_CPU(target_cpu_state); - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); ret = target_cpu->power_state; break; default: diff --git a/target/hppa/int_helper.c b/target/hppa/int_helper.c index 98e9d688f6..efe638b36e 100644 --- a/target/hppa/int_helper.c +++ b/target/hppa/int_helper.c @@ -84,17 +84,17 @@ void hppa_cpu_alarm_timer(void *opaque) void HELPER(write_eirr)(CPUHPPAState *env, target_ulong val) { env->cr[CR_EIRR] &= ~val; - qemu_mutex_lock_iothread(); + bql_lock(); eval_interrupt(env_archcpu(env)); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(write_eiem)(CPUHPPAState *env, target_ulong val) { env->cr[CR_EIEM] = val; - qemu_mutex_lock_iothread(); + bql_lock(); eval_interrupt(env_archcpu(env)); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void hppa_cpu_do_interrupt(CPUState *cs) diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c index 20b9ca3ef5..11ffdd4c69 100644 --- a/target/i386/hvf/hvf.c +++ b/target/i386/hvf/hvf.c @@ -429,9 +429,9 @@ int hvf_vcpu_exec(CPUState *cpu) } vmx_update_tpr(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (!cpu_is_bsp(X86_CPU(cpu)) && cpu->halted) { - qemu_mutex_lock_iothread(); + bql_lock(); return EXCP_HLT; } @@ -450,7 +450,7 @@ int hvf_vcpu_exec(CPUState *cpu) rip = rreg(cpu->accel->fd, HV_X86_RIP); env->eflags = rreg(cpu->accel->fd, HV_X86_RFLAGS); - qemu_mutex_lock_iothread(); + bql_lock(); update_apic_tpr(cpu); current_cpu = cpu; diff --git a/target/i386/kvm/hyperv.c b/target/i386/kvm/hyperv.c index e3ac978648..6825c89af3 100644 --- a/target/i386/kvm/hyperv.c +++ b/target/i386/kvm/hyperv.c @@ -45,9 +45,9 @@ void hyperv_x86_synic_update(X86CPU *cpu) static void async_synic_update(CPUState *cs, run_on_cpu_data data) { - qemu_mutex_lock_iothread(); + bql_lock(); hyperv_x86_synic_update(X86_CPU(cs)); - qemu_mutex_unlock_iothread(); + bql_unlock(); } int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 4ce80555b4..76a66246eb 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -4713,9 +4713,9 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) /* Inject NMI */ if (cpu->interrupt_request & (CPU_INTERRUPT_NMI | CPU_INTERRUPT_SMI)) { if (cpu->interrupt_request & CPU_INTERRUPT_NMI) { - qemu_mutex_lock_iothread(); + bql_lock(); cpu->interrupt_request &= ~CPU_INTERRUPT_NMI; - qemu_mutex_unlock_iothread(); + bql_unlock(); DPRINTF("injected NMI\n"); ret = kvm_vcpu_ioctl(cpu, KVM_NMI); if (ret < 0) { @@ -4724,9 +4724,9 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) } } if (cpu->interrupt_request & CPU_INTERRUPT_SMI) { - qemu_mutex_lock_iothread(); + bql_lock(); cpu->interrupt_request &= ~CPU_INTERRUPT_SMI; - qemu_mutex_unlock_iothread(); + bql_unlock(); DPRINTF("injected SMI\n"); ret = kvm_vcpu_ioctl(cpu, KVM_SMI); if (ret < 0) { @@ -4737,7 +4737,7 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) } if (!kvm_pic_in_kernel()) { - qemu_mutex_lock_iothread(); + bql_lock(); } /* Force the VCPU out of its inner loop to process any INIT requests @@ -4790,7 +4790,7 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) DPRINTF("setting tpr\n"); run->cr8 = cpu_get_apic_tpr(x86_cpu->apic_state); - qemu_mutex_unlock_iothread(); + bql_unlock(); } } @@ -4838,12 +4838,12 @@ MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) /* We need to protect the apic state against concurrent accesses from * different threads in case the userspace irqchip is used. */ if (!kvm_irqchip_in_kernel()) { - qemu_mutex_lock_iothread(); + bql_lock(); } cpu_set_apic_tpr(x86_cpu->apic_state, run->cr8); cpu_set_apic_base(x86_cpu->apic_state, run->apic_base); if (!kvm_irqchip_in_kernel()) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } return cpu_get_mem_attrs(env); } @@ -5277,17 +5277,17 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) switch (run->exit_reason) { case KVM_EXIT_HLT: DPRINTF("handle_hlt\n"); - qemu_mutex_lock_iothread(); + bql_lock(); ret = kvm_handle_halt(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); break; case KVM_EXIT_SET_TPR: ret = 0; break; case KVM_EXIT_TPR_ACCESS: - qemu_mutex_lock_iothread(); + bql_lock(); ret = kvm_handle_tpr_access(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); break; case KVM_EXIT_FAIL_ENTRY: code = run->fail_entry.hardware_entry_failure_reason; @@ -5313,9 +5313,9 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) break; case KVM_EXIT_DEBUG: DPRINTF("kvm_exit_debug\n"); - qemu_mutex_lock_iothread(); + bql_lock(); ret = kvm_handle_debug(cpu, &run->debug.arch); - qemu_mutex_unlock_iothread(); + bql_unlock(); break; case KVM_EXIT_HYPERV: ret = kvm_hv_handle_exit(cpu, &run->hyperv); diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index c0631f9cf4..b0ed2e6aeb 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -403,7 +403,7 @@ void kvm_xen_maybe_deassert_callback(CPUState *cs) /* If the evtchn_upcall_pending flag is cleared, turn the GSI off. */ if (!vi->evtchn_upcall_pending) { - qemu_mutex_lock_iothread(); + bql_lock(); /* * Check again now we have the lock, because it may have been * asserted in the interim. And we don't want to take the lock @@ -413,7 +413,7 @@ void kvm_xen_maybe_deassert_callback(CPUState *cs) X86_CPU(cs)->env.xen_callback_asserted = false; xen_evtchn_set_callback_level(0); } - qemu_mutex_unlock_iothread(); + bql_unlock(); } } @@ -773,9 +773,9 @@ static bool handle_set_param(struct kvm_xen_exit *exit, X86CPU *cpu, switch (hp.index) { case HVM_PARAM_CALLBACK_IRQ: - qemu_mutex_lock_iothread(); + bql_lock(); err = xen_evtchn_set_callback_param(hp.value); - qemu_mutex_unlock_iothread(); + bql_unlock(); xen_set_long_mode(exit->u.hcall.longmode); break; default: @@ -1408,7 +1408,7 @@ int kvm_xen_soft_reset(void) CPUState *cpu; int err; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); trace_kvm_xen_soft_reset(); @@ -1481,9 +1481,9 @@ static int schedop_shutdown(CPUState *cs, uint64_t arg) break; case SHUTDOWN_soft_reset: - qemu_mutex_lock_iothread(); + bql_lock(); ret = kvm_xen_soft_reset(); - qemu_mutex_unlock_iothread(); + bql_unlock(); break; default: diff --git a/target/i386/nvmm/nvmm-accel-ops.c b/target/i386/nvmm/nvmm-accel-ops.c index 6c46101ac1..f9d5e9a37a 100644 --- a/target/i386/nvmm/nvmm-accel-ops.c +++ b/target/i386/nvmm/nvmm-accel-ops.c @@ -25,7 +25,7 @@ static void *qemu_nvmm_cpu_thread_fn(void *arg) rcu_register_thread(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_thread_get_self(cpu->thread); cpu->thread_id = qemu_get_thread_id(); current_cpu = cpu; @@ -55,7 +55,7 @@ static void *qemu_nvmm_cpu_thread_fn(void *arg) nvmm_destroy_vcpu(cpu); cpu_thread_signal_destroyed(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); rcu_unregister_thread(); return NULL; } diff --git a/target/i386/nvmm/nvmm-all.c b/target/i386/nvmm/nvmm-all.c index 7d752bc5e0..cfdca91123 100644 --- a/target/i386/nvmm/nvmm-all.c +++ b/target/i386/nvmm/nvmm-all.c @@ -399,7 +399,7 @@ nvmm_vcpu_pre_run(CPUState *cpu) uint8_t tpr; int ret; - qemu_mutex_lock_iothread(); + bql_lock(); tpr = cpu_get_apic_tpr(x86_cpu->apic_state); if (tpr != qcpu->tpr) { @@ -462,7 +462,7 @@ nvmm_vcpu_pre_run(CPUState *cpu) } } - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* @@ -485,9 +485,9 @@ nvmm_vcpu_post_run(CPUState *cpu, struct nvmm_vcpu_exit *exit) tpr = exit->exitstate.cr8; if (qcpu->tpr != tpr) { qcpu->tpr = tpr; - qemu_mutex_lock_iothread(); + bql_lock(); cpu_set_apic_tpr(x86_cpu->apic_state, qcpu->tpr); - qemu_mutex_unlock_iothread(); + bql_unlock(); } } @@ -648,7 +648,7 @@ nvmm_handle_halted(struct nvmm_machine *mach, CPUState *cpu, CPUX86State *env = cpu_env(cpu); int ret = 0; - qemu_mutex_lock_iothread(); + bql_lock(); if (!((cpu->interrupt_request & CPU_INTERRUPT_HARD) && (env->eflags & IF_MASK)) && @@ -658,7 +658,7 @@ nvmm_handle_halted(struct nvmm_machine *mach, CPUState *cpu, ret = 1; } - qemu_mutex_unlock_iothread(); + bql_unlock(); return ret; } @@ -721,7 +721,7 @@ nvmm_vcpu_loop(CPUState *cpu) return 0; } - qemu_mutex_unlock_iothread(); + bql_unlock(); cpu_exec_start(cpu); /* @@ -806,16 +806,16 @@ nvmm_vcpu_loop(CPUState *cpu) error_report("NVMM: Unexpected VM exit code 0x%lx [hw=0x%lx]", exit->reason, exit->u.inv.hwcode); nvmm_get_registers(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_system_guest_panicked(cpu_get_crash_info(cpu)); - qemu_mutex_unlock_iothread(); + bql_unlock(); ret = -1; break; } } while (ret == 0); cpu_exec_end(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); qatomic_set(&cpu->exit_request, false); diff --git a/target/i386/tcg/sysemu/fpu_helper.c b/target/i386/tcg/sysemu/fpu_helper.c index 93506cdd94..e0305ba234 100644 --- a/target/i386/tcg/sysemu/fpu_helper.c +++ b/target/i386/tcg/sysemu/fpu_helper.c @@ -32,9 +32,9 @@ void x86_register_ferr_irq(qemu_irq irq) void fpu_check_raise_ferr_irq(CPUX86State *env) { if (ferr_irq && !(env->hflags2 & HF2_IGNNE_MASK)) { - qemu_mutex_lock_iothread(); + bql_lock(); qemu_irq_raise(ferr_irq); - qemu_mutex_unlock_iothread(); + bql_unlock(); return; } } @@ -49,7 +49,7 @@ void cpu_set_ignne(void) { CPUX86State *env = &X86_CPU(first_cpu)->env; - assert(qemu_mutex_iothread_locked()); + assert(bql_locked()); env->hflags2 |= HF2_IGNNE_MASK; /* diff --git a/target/i386/tcg/sysemu/misc_helper.c b/target/i386/tcg/sysemu/misc_helper.c index e1528b7f80..1ddfc9fe09 100644 --- a/target/i386/tcg/sysemu/misc_helper.c +++ b/target/i386/tcg/sysemu/misc_helper.c @@ -118,9 +118,9 @@ void helper_write_crN(CPUX86State *env, int reg, target_ulong t0) break; case 8: if (!(env->hflags2 & HF2_VINTR_MASK)) { - qemu_mutex_lock_iothread(); + bql_lock(); cpu_set_apic_tpr(env_archcpu(env)->apic_state, t0); - qemu_mutex_unlock_iothread(); + bql_unlock(); } env->int_ctl = (env->int_ctl & ~V_TPR_MASK) | (t0 & V_TPR_MASK); diff --git a/target/i386/whpx/whpx-accel-ops.c b/target/i386/whpx/whpx-accel-ops.c index 67cad86720..e783a760a7 100644 --- a/target/i386/whpx/whpx-accel-ops.c +++ b/target/i386/whpx/whpx-accel-ops.c @@ -25,7 +25,7 @@ static void *whpx_cpu_thread_fn(void *arg) rcu_register_thread(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_thread_get_self(cpu->thread); cpu->thread_id = qemu_get_thread_id(); current_cpu = cpu; @@ -55,7 +55,7 @@ static void *whpx_cpu_thread_fn(void *arg) whpx_destroy_vcpu(cpu); cpu_thread_signal_destroyed(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); rcu_unregister_thread(); return NULL; } diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c index d29ba916a0..a7262654ac 100644 --- a/target/i386/whpx/whpx-all.c +++ b/target/i386/whpx/whpx-all.c @@ -1324,7 +1324,7 @@ static int whpx_first_vcpu_starting(CPUState *cpu) struct whpx_state *whpx = &whpx_global; HRESULT hr; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); if (!QTAILQ_EMPTY(&cpu->breakpoints) || (whpx->breakpoints.breakpoints && @@ -1442,7 +1442,7 @@ static int whpx_handle_halt(CPUState *cpu) CPUX86State *env = cpu_env(cpu); int ret = 0; - qemu_mutex_lock_iothread(); + bql_lock(); if (!((cpu->interrupt_request & CPU_INTERRUPT_HARD) && (env->eflags & IF_MASK)) && !(cpu->interrupt_request & CPU_INTERRUPT_NMI)) { @@ -1450,7 +1450,7 @@ static int whpx_handle_halt(CPUState *cpu) cpu->halted = true; ret = 1; } - qemu_mutex_unlock_iothread(); + bql_unlock(); return ret; } @@ -1472,7 +1472,7 @@ static void whpx_vcpu_pre_run(CPUState *cpu) memset(&new_int, 0, sizeof(new_int)); memset(reg_values, 0, sizeof(reg_values)); - qemu_mutex_lock_iothread(); + bql_lock(); /* Inject NMI */ if (!vcpu->interruption_pending && @@ -1563,7 +1563,7 @@ static void whpx_vcpu_pre_run(CPUState *cpu) reg_count += 1; } - qemu_mutex_unlock_iothread(); + bql_unlock(); vcpu->ready_for_pic_interrupt = false; if (reg_count) { @@ -1590,9 +1590,9 @@ static void whpx_vcpu_post_run(CPUState *cpu) uint64_t tpr = vcpu->exit_ctx.VpContext.Cr8; if (vcpu->tpr != tpr) { vcpu->tpr = tpr; - qemu_mutex_lock_iothread(); + bql_lock(); cpu_set_apic_tpr(x86_cpu->apic_state, whpx_cr8_to_apic_tpr(vcpu->tpr)); - qemu_mutex_unlock_iothread(); + bql_unlock(); } vcpu->interruption_pending = @@ -1652,7 +1652,7 @@ static int whpx_vcpu_run(CPUState *cpu) WhpxStepMode exclusive_step_mode = WHPX_STEP_NONE; int ret; - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); if (whpx->running_cpus++ == 0) { /* Insert breakpoints into memory, update exception exit bitmap. */ @@ -1690,7 +1690,7 @@ static int whpx_vcpu_run(CPUState *cpu) } } - qemu_mutex_unlock_iothread(); + bql_unlock(); if (exclusive_step_mode != WHPX_STEP_NONE) { start_exclusive(); @@ -2028,9 +2028,9 @@ static int whpx_vcpu_run(CPUState *cpu) error_report("WHPX: Unexpected VP exit code %d", vcpu->exit_ctx.ExitReason); whpx_get_registers(cpu); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_system_guest_panicked(cpu_get_crash_info(cpu)); - qemu_mutex_unlock_iothread(); + bql_unlock(); break; } @@ -2055,7 +2055,7 @@ static int whpx_vcpu_run(CPUState *cpu) cpu_exec_end(cpu); } - qemu_mutex_lock_iothread(); + bql_lock(); current_cpu = cpu; if (--whpx->running_cpus == 0) { diff --git a/target/loongarch/csr_helper.c b/target/loongarch/csr_helper.c index 55341551a5..15f94caefa 100644 --- a/target/loongarch/csr_helper.c +++ b/target/loongarch/csr_helper.c @@ -89,9 +89,9 @@ target_ulong helper_csrwr_ticlr(CPULoongArchState *env, target_ulong val) int64_t old_v = 0; if (val & 0x1) { - qemu_mutex_lock_iothread(); + bql_lock(); loongarch_cpu_set_irq(cpu, IRQ_TIMER, 0); - qemu_mutex_unlock_iothread(); + bql_unlock(); } return old_v; } diff --git a/target/mips/kvm.c b/target/mips/kvm.c index e22e24ed97..15d0cf9adb 100644 --- a/target/mips/kvm.c +++ b/target/mips/kvm.c @@ -138,7 +138,7 @@ void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run) int r; struct kvm_mips_interrupt intr; - qemu_mutex_lock_iothread(); + bql_lock(); if ((cs->interrupt_request & CPU_INTERRUPT_HARD) && cpu_mips_io_interrupts_pending(cpu)) { @@ -151,7 +151,7 @@ void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run) } } - qemu_mutex_unlock_iothread(); + bql_unlock(); } MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) diff --git a/target/mips/tcg/sysemu/cp0_helper.c b/target/mips/tcg/sysemu/cp0_helper.c index d349548743..cc545aed9c 100644 --- a/target/mips/tcg/sysemu/cp0_helper.c +++ b/target/mips/tcg/sysemu/cp0_helper.c @@ -59,9 +59,9 @@ static inline void mips_vpe_wake(MIPSCPU *c) * because there might be other conditions that state that c should * be sleeping. */ - qemu_mutex_lock_iothread(); + bql_lock(); cpu_interrupt(CPU(c), CPU_INTERRUPT_WAKE); - qemu_mutex_unlock_iothread(); + bql_unlock(); } static inline void mips_vpe_sleep(MIPSCPU *cpu) diff --git a/target/openrisc/sys_helper.c b/target/openrisc/sys_helper.c index 782a5751b7..77567afba4 100644 --- a/target/openrisc/sys_helper.c +++ b/target/openrisc/sys_helper.c @@ -160,20 +160,20 @@ void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb) break; case TO_SPR(9, 0): /* PICMR */ env->picmr = rb; - qemu_mutex_lock_iothread(); + bql_lock(); if (env->picsr & env->picmr) { cpu_interrupt(cs, CPU_INTERRUPT_HARD); } else { cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); } - qemu_mutex_unlock_iothread(); + bql_unlock(); break; case TO_SPR(9, 2): /* PICSR */ env->picsr &= ~rb; break; case TO_SPR(10, 0): /* TTMR */ { - qemu_mutex_lock_iothread(); + bql_lock(); if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) { switch (rb & TTMR_M) { case TIMER_NONE: @@ -198,15 +198,15 @@ void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb) cs->interrupt_request &= ~CPU_INTERRUPT_TIMER; } cpu_openrisc_timer_update(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); } break; case TO_SPR(10, 1): /* TTCR */ - qemu_mutex_lock_iothread(); + bql_lock(); cpu_openrisc_count_set(cpu, rb); cpu_openrisc_timer_update(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); break; } #endif @@ -347,9 +347,9 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd, return env->ttmr; case TO_SPR(10, 1): /* TTCR */ - qemu_mutex_lock_iothread(); + bql_lock(); cpu_openrisc_count_update(cpu); - qemu_mutex_unlock_iothread(); + bql_unlock(); return cpu_openrisc_count_get(cpu); } #endif diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index a42743a3e0..8a2bfb5aa2 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -3056,7 +3056,7 @@ void helper_msgsnd(target_ulong rb) return; } - qemu_mutex_lock_iothread(); + bql_lock(); CPU_FOREACH(cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); CPUPPCState *cenv = &cpu->env; @@ -3065,7 +3065,7 @@ void helper_msgsnd(target_ulong rb) ppc_set_irq(cpu, irq, 1); } } - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* Server Processor Control */ @@ -3093,7 +3093,7 @@ static void book3s_msgsnd_common(int pir, int irq) { CPUState *cs; - qemu_mutex_lock_iothread(); + bql_lock(); CPU_FOREACH(cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); CPUPPCState *cenv = &cpu->env; @@ -3103,7 +3103,7 @@ static void book3s_msgsnd_common(int pir, int irq) ppc_set_irq(cpu, irq, 1); } } - qemu_mutex_unlock_iothread(); + bql_unlock(); } void helper_book3s_msgsnd(target_ulong rb) @@ -3157,14 +3157,14 @@ void helper_book3s_msgsndp(CPUPPCState *env, target_ulong rb) } /* Does iothread need to be locked for walking CPU list? */ - qemu_mutex_lock_iothread(); + bql_lock(); THREAD_SIBLING_FOREACH(cs, ccs) { PowerPCCPU *ccpu = POWERPC_CPU(ccs); uint32_t thread_id = ppc_cpu_tir(ccpu); if (ttir == thread_id) { ppc_set_irq(ccpu, PPC_INTERRUPT_DOORBELL, 1); - qemu_mutex_unlock_iothread(); + bql_unlock(); return; } } diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c index 9b1abe2fc4..26fa9d0575 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -1656,7 +1656,7 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) CPUPPCState *env = &cpu->env; int ret; - qemu_mutex_lock_iothread(); + bql_lock(); switch (run->exit_reason) { case KVM_EXIT_DCR: @@ -1715,7 +1715,7 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) break; } - qemu_mutex_unlock_iothread(); + bql_unlock(); return ret; } diff --git a/target/ppc/misc_helper.c b/target/ppc/misc_helper.c index a05bdf78c9..a9d41d2802 100644 --- a/target/ppc/misc_helper.c +++ b/target/ppc/misc_helper.c @@ -238,7 +238,7 @@ target_ulong helper_load_dpdes(CPUPPCState *env) return dpdes; } - qemu_mutex_lock_iothread(); + bql_lock(); THREAD_SIBLING_FOREACH(cs, ccs) { PowerPCCPU *ccpu = POWERPC_CPU(ccs); CPUPPCState *cenv = &ccpu->env; @@ -248,7 +248,7 @@ target_ulong helper_load_dpdes(CPUPPCState *env) dpdes |= (0x1 << thread_id); } } - qemu_mutex_unlock_iothread(); + bql_unlock(); return dpdes; } @@ -278,14 +278,14 @@ void helper_store_dpdes(CPUPPCState *env, target_ulong val) } /* Does iothread need to be locked for walking CPU list? */ - qemu_mutex_lock_iothread(); + bql_lock(); THREAD_SIBLING_FOREACH(cs, ccs) { PowerPCCPU *ccpu = POWERPC_CPU(ccs); uint32_t thread_id = ppc_cpu_tir(ccpu); ppc_set_irq(cpu, PPC_INTERRUPT_DOORBELL, val & (0x1 << thread_id)); } - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif /* defined(TARGET_PPC64) */ diff --git a/target/ppc/timebase_helper.c b/target/ppc/timebase_helper.c index 08a6b47ee0..f618ed2922 100644 --- a/target/ppc/timebase_helper.c +++ b/target/ppc/timebase_helper.c @@ -173,9 +173,9 @@ target_ulong helper_load_dcr(CPUPPCState *env, target_ulong dcrn) } else { int ret; - qemu_mutex_lock_iothread(); + bql_lock(); ret = ppc_dcr_read(env->dcr_env, (uint32_t)dcrn, &val); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (unlikely(ret != 0)) { qemu_log_mask(LOG_GUEST_ERROR, "DCR read error %d %03x\n", (uint32_t)dcrn, (uint32_t)dcrn); @@ -196,9 +196,9 @@ void helper_store_dcr(CPUPPCState *env, target_ulong dcrn, target_ulong val) POWERPC_EXCP_INVAL_INVAL, GETPC()); } else { int ret; - qemu_mutex_lock_iothread(); + bql_lock(); ret = ppc_dcr_write(env->dcr_env, (uint32_t)dcrn, (uint32_t)val); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (unlikely(ret != 0)) { qemu_log_mask(LOG_GUEST_ERROR, "DCR write error %d %03x\n", (uint32_t)dcrn, (uint32_t)dcrn); diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 33ab3551f4..888d6c1a1c 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -1923,7 +1923,7 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) S390CPU *cpu = S390_CPU(cs); int ret = 0; - qemu_mutex_lock_iothread(); + bql_lock(); kvm_cpu_synchronize_state(cs); @@ -1947,7 +1947,7 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason); break; } - qemu_mutex_unlock_iothread(); + bql_unlock(); if (ret == 0) { ret = EXCP_INTERRUPT; diff --git a/target/s390x/tcg/misc_helper.c b/target/s390x/tcg/misc_helper.c index 6aa7907438..89b5268fd4 100644 --- a/target/s390x/tcg/misc_helper.c +++ b/target/s390x/tcg/misc_helper.c @@ -101,9 +101,9 @@ uint64_t HELPER(stck)(CPUS390XState *env) /* SCLP service call */ uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2) { - qemu_mutex_lock_iothread(); + bql_lock(); int r = sclp_service_call(env_archcpu(env), r1, r2); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (r < 0) { tcg_s390_program_interrupt(env, -r, GETPC()); } @@ -117,9 +117,9 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num) switch (num) { case 0x500: /* KVM hypercall */ - qemu_mutex_lock_iothread(); + bql_lock(); r = s390_virtio_hypercall(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); break; case 0x44: /* yield */ @@ -127,9 +127,9 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num) break; case 0x308: /* ipl */ - qemu_mutex_lock_iothread(); + bql_lock(); handle_diag_308(env, r1, r3, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); r = 0; break; case 0x288: @@ -185,7 +185,7 @@ static void update_ckc_timer(CPUS390XState *env) /* stop the timer and remove pending CKC IRQs */ timer_del(env->tod_timer); - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); env->pending_int &= ~INTERRUPT_EXT_CLOCK_COMPARATOR; /* the tod has to exceed the ckc, this can never happen if ckc is all 1's */ @@ -207,9 +207,9 @@ void HELPER(sckc)(CPUS390XState *env, uint64_t ckc) { env->ckc = ckc; - qemu_mutex_lock_iothread(); + bql_lock(); update_ckc_timer(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void tcg_s390_tod_updated(CPUState *cs, run_on_cpu_data opaque) @@ -229,9 +229,9 @@ uint32_t HELPER(sck)(CPUS390XState *env, uint64_t tod_low) .low = tod_low, }; - qemu_mutex_lock_iothread(); + bql_lock(); tdc->set(td, &tod, &error_abort); - qemu_mutex_unlock_iothread(); + bql_unlock(); return 0; } @@ -421,9 +421,9 @@ uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1, int cc; /* TODO: needed to inject interrupts - push further down */ - qemu_mutex_lock_iothread(); + bql_lock(); cc = handle_sigp(env, order_code & SIGP_ORDER_MASK, r1, r3); - qemu_mutex_unlock_iothread(); + bql_unlock(); return cc; } @@ -433,92 +433,92 @@ uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1, void HELPER(xsch)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_xsch(cpu, r1, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(csch)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_csch(cpu, r1, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(hsch)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_hsch(cpu, r1, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(msch)(CPUS390XState *env, uint64_t r1, uint64_t inst) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_msch(cpu, r1, inst >> 16, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(rchp)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_rchp(cpu, r1, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(rsch)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_rsch(cpu, r1, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(sal)(CPUS390XState *env, uint64_t r1) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_sal(cpu, r1, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(schm)(CPUS390XState *env, uint64_t r1, uint64_t r2, uint64_t inst) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_schm(cpu, r1, r2, inst >> 16, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(ssch)(CPUS390XState *env, uint64_t r1, uint64_t inst) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_ssch(cpu, r1, inst >> 16, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(stcrw)(CPUS390XState *env, uint64_t inst) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_stcrw(cpu, inst >> 16, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(stsch)(CPUS390XState *env, uint64_t r1, uint64_t inst) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_stsch(cpu, r1, inst >> 16, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t addr) @@ -533,10 +533,10 @@ uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t addr) tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra); } - qemu_mutex_lock_iothread(); + bql_lock(); io = qemu_s390_flic_dequeue_io(flic, env->cregs[6]); if (!io) { - qemu_mutex_unlock_iothread(); + bql_unlock(); return 0; } @@ -554,7 +554,7 @@ uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t addr) if (s390_cpu_virt_mem_write(cpu, addr, 0, &intc, sizeof(intc))) { /* writing failed, reinject and properly clean up */ s390_io_interrupt(io->id, io->nr, io->parm, io->word); - qemu_mutex_unlock_iothread(); + bql_unlock(); g_free(io); s390_cpu_virt_mem_handle_exc(cpu, ra); return 0; @@ -570,24 +570,24 @@ uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t addr) } g_free(io); - qemu_mutex_unlock_iothread(); + bql_unlock(); return 1; } void HELPER(tsch)(CPUS390XState *env, uint64_t r1, uint64_t inst) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_tsch(cpu, r1, inst >> 16, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(chsc)(CPUS390XState *env, uint64_t inst) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); ioinst_handle_chsc(cpu, inst >> 16, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif @@ -726,27 +726,27 @@ void HELPER(clp)(CPUS390XState *env, uint32_t r2) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); clp_service_call(cpu, r2, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(pcilg)(CPUS390XState *env, uint32_t r1, uint32_t r2) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); pcilg_service_call(cpu, r1, r2, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(pcistg)(CPUS390XState *env, uint32_t r1, uint32_t r2) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); pcistg_service_call(cpu, r1, r2, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(stpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba, @@ -754,9 +754,9 @@ void HELPER(stpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba, { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); stpcifc_service_call(cpu, r1, fiba, ar, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(sic)(CPUS390XState *env, uint64_t r1, uint64_t r3) @@ -764,9 +764,9 @@ void HELPER(sic)(CPUS390XState *env, uint64_t r1, uint64_t r3) S390CPU *cpu = env_archcpu(env); int r; - qemu_mutex_lock_iothread(); + bql_lock(); r = css_do_sic(cpu, (r3 >> 27) & 0x7, r1 & 0xffff); - qemu_mutex_unlock_iothread(); + bql_unlock(); /* css_do_sic() may actually return a PGM_xxx value to inject */ if (r) { tcg_s390_program_interrupt(env, -r, GETPC()); @@ -777,9 +777,9 @@ void HELPER(rpcit)(CPUS390XState *env, uint32_t r1, uint32_t r2) { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); rpcit_service_call(cpu, r1, r2, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(pcistb)(CPUS390XState *env, uint32_t r1, uint32_t r3, @@ -787,9 +787,9 @@ void HELPER(pcistb)(CPUS390XState *env, uint32_t r1, uint32_t r3, { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); pcistb_service_call(cpu, r1, r3, gaddr, ar, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(mpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba, @@ -797,8 +797,8 @@ void HELPER(mpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba, { S390CPU *cpu = env_archcpu(env); - qemu_mutex_lock_iothread(); + bql_lock(); mpcifc_service_call(cpu, r1, fiba, ar, GETPC()); - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif diff --git a/target/sparc/int32_helper.c b/target/sparc/int32_helper.c index 1563613582..49a9149263 100644 --- a/target/sparc/int32_helper.c +++ b/target/sparc/int32_helper.c @@ -70,7 +70,7 @@ void cpu_check_irqs(CPUSPARCState *env) CPUState *cs; /* We should be holding the BQL before we mess with IRQs */ - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); if (env->pil_in && (env->interrupt_index == 0 || (env->interrupt_index & ~15) == TT_EXTINT)) { diff --git a/target/sparc/int64_helper.c b/target/sparc/int64_helper.c index 1b4155f5f3..27df9dba89 100644 --- a/target/sparc/int64_helper.c +++ b/target/sparc/int64_helper.c @@ -69,7 +69,7 @@ void cpu_check_irqs(CPUSPARCState *env) (env->softint & ~(SOFTINT_TIMER | SOFTINT_STIMER)); /* We should be holding the BQL before we mess with IRQs */ - g_assert(qemu_mutex_iothread_locked()); + g_assert(bql_locked()); /* TT_IVEC has a higher priority (16) than TT_EXTINT (31..17) */ if (env->ivec_status & 0x20) { @@ -267,9 +267,9 @@ static bool do_modify_softint(CPUSPARCState *env, uint32_t value) env->softint = value; #if !defined(CONFIG_USER_ONLY) if (cpu_interrupts_enabled(env)) { - qemu_mutex_lock_iothread(); + bql_lock(); cpu_check_irqs(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif return true; diff --git a/target/sparc/win_helper.c b/target/sparc/win_helper.c index 16d1c70fe7..b53fc9ce94 100644 --- a/target/sparc/win_helper.c +++ b/target/sparc/win_helper.c @@ -179,9 +179,9 @@ void helper_wrpsr(CPUSPARCState *env, target_ulong new_psr) cpu_raise_exception_ra(env, TT_ILL_INSN, GETPC()); } else { /* cpu_put_psr may trigger interrupts, hence BQL */ - qemu_mutex_lock_iothread(); + bql_lock(); cpu_put_psr(env, new_psr); - qemu_mutex_unlock_iothread(); + bql_unlock(); } } @@ -407,9 +407,9 @@ void helper_wrpstate(CPUSPARCState *env, target_ulong new_state) #if !defined(CONFIG_USER_ONLY) if (cpu_interrupts_enabled(env)) { - qemu_mutex_lock_iothread(); + bql_lock(); cpu_check_irqs(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif } @@ -422,9 +422,9 @@ void helper_wrpil(CPUSPARCState *env, target_ulong new_pil) env->psrpil = new_pil; if (cpu_interrupts_enabled(env)) { - qemu_mutex_lock_iothread(); + bql_lock(); cpu_check_irqs(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif } @@ -451,9 +451,9 @@ void helper_done(CPUSPARCState *env) #if !defined(CONFIG_USER_ONLY) if (cpu_interrupts_enabled(env)) { - qemu_mutex_lock_iothread(); + bql_lock(); cpu_check_irqs(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif } @@ -480,9 +480,9 @@ void helper_retry(CPUSPARCState *env) #if !defined(CONFIG_USER_ONLY) if (cpu_interrupts_enabled(env)) { - qemu_mutex_lock_iothread(); + bql_lock(); cpu_check_irqs(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); } #endif } diff --git a/target/xtensa/exc_helper.c b/target/xtensa/exc_helper.c index 91354884f7..168419a505 100644 --- a/target/xtensa/exc_helper.c +++ b/target/xtensa/exc_helper.c @@ -105,9 +105,9 @@ void HELPER(waiti)(CPUXtensaState *env, uint32_t pc, uint32_t intlevel) env->sregs[PS] = (env->sregs[PS] & ~PS_INTLEVEL) | (intlevel << PS_INTLEVEL_SHIFT); - qemu_mutex_lock_iothread(); + bql_lock(); check_interrupts(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (env->pending_irq_level) { cpu_loop_exit(cpu); @@ -120,9 +120,9 @@ void HELPER(waiti)(CPUXtensaState *env, uint32_t pc, uint32_t intlevel) void HELPER(check_interrupts)(CPUXtensaState *env) { - qemu_mutex_lock_iothread(); + bql_lock(); check_interrupts(env); - qemu_mutex_unlock_iothread(); + bql_unlock(); } void HELPER(intset)(CPUXtensaState *env, uint32_t v) diff --git a/ui/spice-core.c b/ui/spice-core.c index db21db2c94..b6ee495a8f 100644 --- a/ui/spice-core.c +++ b/ui/spice-core.c @@ -222,7 +222,7 @@ static void channel_event(int event, SpiceChannelEventInfo *info) */ bool need_lock = !qemu_thread_is_self(&me); if (need_lock) { - qemu_mutex_lock_iothread(); + bql_lock(); } if (info->flags & SPICE_CHANNEL_EVENT_FLAG_ADDR_EXT) { @@ -260,7 +260,7 @@ static void channel_event(int event, SpiceChannelEventInfo *info) } if (need_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } qapi_free_SpiceServerInfo(server); diff --git a/util/async.c b/util/async.c index 8f90ddc304..def720045b 100644 --- a/util/async.c +++ b/util/async.c @@ -741,7 +741,7 @@ AioContext *qemu_get_current_aio_context(void) if (ctx) { return ctx; } - if (qemu_mutex_iothread_locked()) { + if (bql_locked()) { /* Possibly in a vCPU thread. */ return qemu_get_aio_context(); } diff --git a/util/main-loop.c b/util/main-loop.c index 797b640c41..bfbff4f246 100644 --- a/util/main-loop.c +++ b/util/main-loop.c @@ -302,13 +302,13 @@ static int os_host_main_loop_wait(int64_t timeout) glib_pollfds_fill(&timeout); - qemu_mutex_unlock_iothread(); + bql_unlock(); replay_mutex_unlock(); ret = qemu_poll_ns((GPollFD *)gpollfds->data, gpollfds->len, timeout); replay_mutex_lock(); - qemu_mutex_lock_iothread(); + bql_lock(); glib_pollfds_poll(); @@ -517,7 +517,7 @@ static int os_host_main_loop_wait(int64_t timeout) poll_timeout_ns = qemu_soonest_timeout(poll_timeout_ns, timeout); - qemu_mutex_unlock_iothread(); + bql_unlock(); replay_mutex_unlock(); @@ -525,7 +525,7 @@ static int os_host_main_loop_wait(int64_t timeout) replay_mutex_lock(); - qemu_mutex_lock_iothread(); + bql_lock(); if (g_poll_ret > 0) { for (i = 0; i < w->num; i++) { w->revents[i] = poll_fds[n_poll_fds + i].revents; diff --git a/util/qsp.c b/util/qsp.c index 2fe3764906..6b783e2e7f 100644 --- a/util/qsp.c +++ b/util/qsp.c @@ -124,7 +124,7 @@ static const char * const qsp_typenames[] = { [QSP_CONDVAR] = "condvar", }; -QemuMutexLockFunc qemu_bql_mutex_lock_func = qemu_mutex_lock_impl; +QemuMutexLockFunc bql_mutex_lock_func = qemu_mutex_lock_impl; QemuMutexLockFunc qemu_mutex_lock_func = qemu_mutex_lock_impl; QemuMutexTrylockFunc qemu_mutex_trylock_func = qemu_mutex_trylock_impl; QemuRecMutexLockFunc qemu_rec_mutex_lock_func = qemu_rec_mutex_lock_impl; @@ -439,7 +439,7 @@ void qsp_enable(void) { qatomic_set(&qemu_mutex_lock_func, qsp_mutex_lock); qatomic_set(&qemu_mutex_trylock_func, qsp_mutex_trylock); - qatomic_set(&qemu_bql_mutex_lock_func, qsp_bql_mutex_lock); + qatomic_set(&bql_mutex_lock_func, qsp_bql_mutex_lock); qatomic_set(&qemu_rec_mutex_lock_func, qsp_rec_mutex_lock); qatomic_set(&qemu_rec_mutex_trylock_func, qsp_rec_mutex_trylock); qatomic_set(&qemu_cond_wait_func, qsp_cond_wait); @@ -450,7 +450,7 @@ void qsp_disable(void) { qatomic_set(&qemu_mutex_lock_func, qemu_mutex_lock_impl); qatomic_set(&qemu_mutex_trylock_func, qemu_mutex_trylock_impl); - qatomic_set(&qemu_bql_mutex_lock_func, qemu_mutex_lock_impl); + qatomic_set(&bql_mutex_lock_func, qemu_mutex_lock_impl); qatomic_set(&qemu_rec_mutex_lock_func, qemu_rec_mutex_lock_impl); qatomic_set(&qemu_rec_mutex_trylock_func, qemu_rec_mutex_trylock_impl); qatomic_set(&qemu_cond_wait_func, qemu_cond_wait_impl); diff --git a/util/rcu.c b/util/rcu.c index e587bcc483..bb7f633b5c 100644 --- a/util/rcu.c +++ b/util/rcu.c @@ -283,24 +283,24 @@ static void *call_rcu_thread(void *opaque) qatomic_sub(&rcu_call_count, n); synchronize_rcu(); - qemu_mutex_lock_iothread(); + bql_lock(); while (n > 0) { node = try_dequeue(); while (!node) { - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_event_reset(&rcu_call_ready_event); node = try_dequeue(); if (!node) { qemu_event_wait(&rcu_call_ready_event); node = try_dequeue(); } - qemu_mutex_lock_iothread(); + bql_lock(); } n--; node->func(node); } - qemu_mutex_unlock_iothread(); + bql_unlock(); } abort(); } @@ -337,13 +337,13 @@ static void drain_rcu_callback(struct rcu_head *node) void drain_call_rcu(void) { struct rcu_drain rcu_drain; - bool locked = qemu_mutex_iothread_locked(); + bool locked = bql_locked(); memset(&rcu_drain, 0, sizeof(struct rcu_drain)); qemu_event_init(&rcu_drain.drain_complete_event, false); if (locked) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } @@ -365,7 +365,7 @@ void drain_call_rcu(void) qatomic_dec(&in_drain_call_rcu); if (locked) { - qemu_mutex_lock_iothread(); + bql_lock(); } } diff --git a/audio/coreaudio.m b/audio/coreaudio.m index 8cd129a27d..9d2db9883c 100644 --- a/audio/coreaudio.m +++ b/audio/coreaudio.m @@ -547,7 +547,7 @@ static OSStatus handle_voice_change( { coreaudioVoiceOut *core = in_client_data; - qemu_mutex_lock_iothread(); + bql_lock(); if (core->outputDeviceID) { fini_out_device(core); @@ -557,7 +557,7 @@ static OSStatus handle_voice_change( update_device_playback_state(core); } - qemu_mutex_unlock_iothread(); + bql_unlock(); return 0; } diff --git a/memory_ldst.c.inc b/memory_ldst.c.inc index 84b868f294..0e6f3940a9 100644 --- a/memory_ldst.c.inc +++ b/memory_ldst.c.inc @@ -61,7 +61,7 @@ static inline uint32_t glue(address_space_ldl_internal, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); return val; @@ -130,7 +130,7 @@ static inline uint64_t glue(address_space_ldq_internal, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); return val; @@ -186,7 +186,7 @@ uint8_t glue(address_space_ldub, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); return val; @@ -234,7 +234,7 @@ static inline uint16_t glue(address_space_lduw_internal, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); return val; @@ -295,7 +295,7 @@ void glue(address_space_stl_notdirty, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); } @@ -339,7 +339,7 @@ static inline void glue(address_space_stl_internal, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); } @@ -391,7 +391,7 @@ void glue(address_space_stb, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); } @@ -435,7 +435,7 @@ static inline void glue(address_space_stw_internal, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); } @@ -499,7 +499,7 @@ static void glue(address_space_stq_internal, SUFFIX)(ARG1_DECL, *result = r; } if (release_lock) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } RCU_READ_UNLOCK(); } diff --git a/target/i386/hvf/README.md b/target/i386/hvf/README.md index 2d33477aca..64a8935237 100644 --- a/target/i386/hvf/README.md +++ b/target/i386/hvf/README.md @@ -4,4 +4,4 @@ These sources (and ../hvf-all.c) are adapted from Veertu Inc's vdhh (Veertu Desk 1. Adapt to our current QEMU's `CPUState` structure and `address_space_rw` API; many struct members have been moved around (emulated x86 state, xsave_buf) due to historical differences + QEMU needing to handle more emulation targets. 2. Removal of `apic_page` and hyperv-related functionality. -3. More relaxed use of `qemu_mutex_lock_iothread`. +3. More relaxed use of `bql_lock`. diff --git a/ui/cocoa.m b/ui/cocoa.m index cd069da696..5ebb535070 100644 --- a/ui/cocoa.m +++ b/ui/cocoa.m @@ -117,29 +117,29 @@ static void cocoa_switch(DisplayChangeListener *dcl, typedef void (^CodeBlock)(void); typedef bool (^BoolCodeBlock)(void); -static void with_iothread_lock(CodeBlock block) +static void with_bql(CodeBlock block) { - bool locked = qemu_mutex_iothread_locked(); + bool locked = bql_locked(); if (!locked) { - qemu_mutex_lock_iothread(); + bql_lock(); } block(); if (!locked) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } } -static bool bool_with_iothread_lock(BoolCodeBlock block) +static bool bool_with_bql(BoolCodeBlock block) { - bool locked = qemu_mutex_iothread_locked(); + bool locked = bql_locked(); bool val; if (!locked) { - qemu_mutex_lock_iothread(); + bql_lock(); } val = block(); if (!locked) { - qemu_mutex_unlock_iothread(); + bql_unlock(); } return val; } @@ -605,7 +605,7 @@ - (void) updateUIInfo return; } - with_iothread_lock(^{ + with_bql(^{ [self updateUIInfoLocked]; }); } @@ -790,7 +790,7 @@ - (void) handleMonitorInput:(NSEvent *)event - (bool) handleEvent:(NSEvent *)event { - return bool_with_iothread_lock(^{ + return bool_with_bql(^{ return [self handleEventLocked:event]; }); } @@ -1182,7 +1182,7 @@ - (QEMUScreen) gscreen {return screen;} */ - (void) raiseAllKeys { - with_iothread_lock(^{ + with_bql(^{ qkbd_state_lift_all_keys(kbd); }); } @@ -1282,7 +1282,7 @@ - (void)applicationWillTerminate:(NSNotification *)aNotification { COCOA_DEBUG("QemuCocoaAppController: applicationWillTerminate\n"); - with_iothread_lock(^{ + with_bql(^{ shutdown_action = SHUTDOWN_ACTION_POWEROFF; qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI); }); @@ -1420,7 +1420,7 @@ - (void)displayConsole:(id)sender /* Pause the guest */ - (void)pauseQEMU:(id)sender { - with_iothread_lock(^{ + with_bql(^{ qmp_stop(NULL); }); [sender setEnabled: NO]; @@ -1431,7 +1431,7 @@ - (void)pauseQEMU:(id)sender /* Resume running the guest operating system */ - (void)resumeQEMU:(id) sender { - with_iothread_lock(^{ + with_bql(^{ qmp_cont(NULL); }); [sender setEnabled: NO]; @@ -1461,7 +1461,7 @@ - (void)removePause /* Restarts QEMU */ - (void)restartQEMU:(id)sender { - with_iothread_lock(^{ + with_bql(^{ qmp_system_reset(NULL); }); } @@ -1469,7 +1469,7 @@ - (void)restartQEMU:(id)sender /* Powers down QEMU */ - (void)powerDownQEMU:(id)sender { - with_iothread_lock(^{ + with_bql(^{ qmp_system_powerdown(NULL); }); } @@ -1488,7 +1488,7 @@ - (void)ejectDeviceMedia:(id)sender } __block Error *err = NULL; - with_iothread_lock(^{ + with_bql(^{ qmp_eject([drive cStringUsingEncoding: NSASCIIStringEncoding], NULL, false, false, &err); }); @@ -1523,7 +1523,7 @@ - (void)changeDeviceMedia:(id)sender } __block Error *err = NULL; - with_iothread_lock(^{ + with_bql(^{ qmp_blockdev_change_medium([drive cStringUsingEncoding: NSASCIIStringEncoding], NULL, @@ -1605,7 +1605,7 @@ - (void)adjustSpeed:(id)sender // get the throttle percentage throttle_pct = [sender tag]; - with_iothread_lock(^{ + with_bql(^{ cpu_throttle_set(throttle_pct); }); COCOA_DEBUG("cpu throttling at %d%c\n", cpu_throttle_get_percentage(), '%'); @@ -1819,7 +1819,7 @@ - (void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSPasteboardType)t return; } - with_iothread_lock(^{ + with_bql(^{ QemuClipboardInfo *info = qemu_clipboard_info_ref(cbinfo); qemu_event_reset(&cbevent); qemu_clipboard_request(info, QEMU_CLIPBOARD_TYPE_TEXT); @@ -1827,9 +1827,9 @@ - (void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSPasteboardType)t while (info == cbinfo && info->types[QEMU_CLIPBOARD_TYPE_TEXT].available && info->types[QEMU_CLIPBOARD_TYPE_TEXT].data == NULL) { - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_event_wait(&cbevent); - qemu_mutex_lock_iothread(); + bql_lock(); } if (info == cbinfo) { @@ -1927,9 +1927,9 @@ static void cocoa_clipboard_request(QemuClipboardInfo *info, int status; COCOA_DEBUG("Second thread: calling qemu_default_main()\n"); - qemu_mutex_lock_iothread(); + bql_lock(); status = qemu_default_main(); - qemu_mutex_unlock_iothread(); + bql_unlock(); COCOA_DEBUG("Second thread: qemu_default_main() returned, exiting\n"); [cbowner release]; exit(status); @@ -1941,7 +1941,7 @@ static int cocoa_main(void) COCOA_DEBUG("Entered %s()\n", __func__); - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_thread_create(&thread, "qemu_main", call_qemu_main, NULL, QEMU_THREAD_DETACHED); -- 2.43.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* Re: [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2023-12-12 15:39 ` [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() Stefan Hajnoczi @ 2023-12-13 1:34 ` Yong Huang 2023-12-13 6:37 ` Akihiko Odaki 2024-01-02 21:37 ` Bernhard Beschow 2 siblings, 0 replies; 10+ messages in thread From: Yong Huang @ 2023-12-13 1:34 UTC (permalink / raw) To: Stefan Hajnoczi Cc: qemu-devel, Daniel P. Berrangé, Marcel Apfelbaum, Akihiko Odaki, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé, David Woodhouse [-- Attachment #1: Type: text/plain, Size: 151431 bytes --] On Tue, Dec 12, 2023 at 11:39 PM Stefan Hajnoczi <stefanha@redhat.com> wrote: > The Big QEMU Lock (BQL) has many names and they are confusing. The > actual QemuMutex variable is called qemu_global_mutex but it's commonly > referred to as the BQL in discussions and some code comments. The > locking APIs, however, are called qemu_mutex_lock_iothread() and > qemu_mutex_unlock_iothread(). > > The "iothread" name is historic and comes from when the main thread was > split into into KVM vcpu threads and the "iothread" (now called the main > loop thread). I have contributed to the confusion myself by introducing > a separate --object iothread, a separate concept unrelated to the BQL. > > The "iothread" name is no longer appropriate for the BQL. Rename the > locking APIs to: > - void bql_lock(void) > - void bql_unlock(void) > - bool bql_locked(void) > > There are more APIs with "iothread" in their names. Subsequent patches > will rename them. There are also comments and documentation that will be > updated in later patches. > > Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> > Reviewed-by: Paul Durrant <paul@xen.org> > Acked-by: Fabiano Rosas <farosas@suse.de> > Acked-by: David Woodhouse <dwmw@amazon.co.uk> > Reviewed-by: Cédric Le Goater <clg@kaod.org> > Acked-by: Peter Xu <peterx@redhat.com> > Acked-by: Eric Farman <farman@linux.ibm.com> > Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> > --- > include/block/aio-wait.h | 2 +- > include/qemu/main-loop.h | 40 ++++----- > include/qemu/thread.h | 2 +- > accel/accel-blocker.c | 10 +-- > accel/dummy-cpus.c | 8 +- > accel/hvf/hvf-accel-ops.c | 4 +- > accel/kvm/kvm-accel-ops.c | 4 +- > accel/kvm/kvm-all.c | 22 ++--- > accel/tcg/cpu-exec.c | 26 +++--- > accel/tcg/cputlb.c | 16 ++-- > accel/tcg/tcg-accel-ops-icount.c | 4 +- > accel/tcg/tcg-accel-ops-mttcg.c | 12 +-- > accel/tcg/tcg-accel-ops-rr.c | 14 ++-- > accel/tcg/tcg-accel-ops.c | 2 +- > accel/tcg/translate-all.c | 2 +- > cpu-common.c | 4 +- > dump/dump.c | 4 +- > hw/core/cpu-common.c | 6 +- > hw/i386/intel_iommu.c | 6 +- > hw/i386/kvm/xen_evtchn.c | 16 ++-- > hw/i386/kvm/xen_overlay.c | 2 +- > hw/i386/kvm/xen_xenstore.c | 2 +- > hw/intc/arm_gicv3_cpuif.c | 2 +- > hw/intc/s390_flic.c | 18 ++-- > hw/misc/edu.c | 4 +- > hw/misc/imx6_src.c | 2 +- > hw/misc/imx7_src.c | 2 +- > hw/net/xen_nic.c | 8 +- > hw/ppc/pegasos2.c | 2 +- > hw/ppc/ppc.c | 4 +- > hw/ppc/spapr.c | 2 +- > hw/ppc/spapr_rng.c | 4 +- > hw/ppc/spapr_softmmu.c | 4 +- > hw/remote/mpqemu-link.c | 20 ++--- > hw/remote/vfio-user-obj.c | 2 +- > hw/s390x/s390-skeys.c | 2 +- > migration/block-dirty-bitmap.c | 4 +- > migration/block.c | 16 ++-- > migration/colo.c | 60 +++++++------- > migration/dirtyrate.c | 12 +-- > migration/migration.c | 52 ++++++------ > migration/ram.c | 12 +-- > replay/replay-internal.c | 2 +- > semihosting/console.c | 8 +- > stubs/iothread-lock.c | 6 +- > system/cpu-throttle.c | 4 +- > system/cpus.c | 51 ++++++------ > system/dirtylimit.c | 4 +- > system/memory.c | 2 +- > system/physmem.c | 8 +- > system/runstate.c | 2 +- > system/watchpoint.c | 4 +- > target/arm/arm-powerctl.c | 14 ++-- > target/arm/helper.c | 4 +- > target/arm/hvf/hvf.c | 8 +- > target/arm/kvm.c | 4 +- > target/arm/kvm64.c | 4 +- > target/arm/ptw.c | 6 +- > target/arm/tcg/helper-a64.c | 8 +- > target/arm/tcg/m_helper.c | 6 +- > target/arm/tcg/op_helper.c | 24 +++--- > target/arm/tcg/psci.c | 2 +- > target/hppa/int_helper.c | 8 +- > target/i386/hvf/hvf.c | 6 +- > target/i386/kvm/hyperv.c | 4 +- > target/i386/kvm/kvm.c | 28 +++---- > target/i386/kvm/xen-emu.c | 14 ++-- > target/i386/nvmm/nvmm-accel-ops.c | 4 +- > target/i386/nvmm/nvmm-all.c | 20 ++--- > target/i386/tcg/sysemu/fpu_helper.c | 6 +- > target/i386/tcg/sysemu/misc_helper.c | 4 +- > target/i386/whpx/whpx-accel-ops.c | 4 +- > target/i386/whpx/whpx-all.c | 24 +++--- > target/loongarch/csr_helper.c | 4 +- > target/mips/kvm.c | 4 +- > target/mips/tcg/sysemu/cp0_helper.c | 4 +- > target/openrisc/sys_helper.c | 16 ++-- > target/ppc/excp_helper.c | 12 +-- > target/ppc/kvm.c | 4 +- > target/ppc/misc_helper.c | 8 +- > target/ppc/timebase_helper.c | 8 +- > target/s390x/kvm/kvm.c | 4 +- > target/s390x/tcg/misc_helper.c | 118 +++++++++++++-------------- > target/sparc/int32_helper.c | 2 +- > target/sparc/int64_helper.c | 6 +- > target/sparc/win_helper.c | 20 ++--- > target/xtensa/exc_helper.c | 8 +- > ui/spice-core.c | 4 +- > util/async.c | 2 +- > util/main-loop.c | 8 +- > util/qsp.c | 6 +- > util/rcu.c | 14 ++-- > audio/coreaudio.m | 4 +- > memory_ldst.c.inc | 18 ++-- > target/i386/hvf/README.md | 2 +- > ui/cocoa.m | 50 ++++++------ > 96 files changed, 530 insertions(+), 529 deletions(-) > > diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h > index 5449b6d742..d22ca24329 100644 > --- a/include/block/aio-wait.h > +++ b/include/block/aio-wait.h > @@ -151,7 +151,7 @@ static inline bool > in_aio_context_home_thread(AioContext *ctx) > } > > if (ctx == qemu_get_aio_context()) { > - return qemu_mutex_iothread_locked(); > + return bql_locked(); > } else { > return false; > } > diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h > index 68e70e61aa..596a206acd 100644 > --- a/include/qemu/main-loop.h > +++ b/include/qemu/main-loop.h > @@ -248,19 +248,19 @@ GSource *iohandler_get_g_source(void); > AioContext *iohandler_get_aio_context(void); > > /** > - * qemu_mutex_iothread_locked: Return lock status of the main loop mutex. > + * bql_locked: Return lock status of the Big QEMU Lock (BQL) > * > - * The main loop mutex is the coarsest lock in QEMU, and as such it > + * The Big QEMU Lock (BQL) is the coarsest lock in QEMU, and as such it > * must always be taken outside other locks. This function helps > * functions take different paths depending on whether the current > - * thread is running within the main loop mutex. > + * thread is running within the BQL. > * > * This function should never be used in the block layer, because > * unit tests, block layer tools and qemu-storage-daemon do not > * have a BQL. > * Please instead refer to qemu_in_main_thread(). > */ > -bool qemu_mutex_iothread_locked(void); > +bool bql_locked(void); > > /** > * qemu_in_main_thread: return whether it's possible to safely access > @@ -312,58 +312,58 @@ bool qemu_in_main_thread(void); > } while (0) > > /** > - * qemu_mutex_lock_iothread: Lock the main loop mutex. > + * bql_lock: Lock the Big QEMU Lock (BQL). > * > - * This function locks the main loop mutex. The mutex is taken by > + * This function locks the Big QEMU Lock (BQL). The lock is taken by > * main() in vl.c and always taken except while waiting on > - * external events (such as with select). The mutex should be taken > + * external events (such as with select). The lock should be taken > * by threads other than the main loop thread when calling > * qemu_bh_new(), qemu_set_fd_handler() and basically all other > * functions documented in this file. > * > - * NOTE: tools currently are single-threaded and qemu_mutex_lock_iothread > + * NOTE: tools currently are single-threaded and bql_lock > * is a no-op there. > */ > -#define qemu_mutex_lock_iothread() \ > - qemu_mutex_lock_iothread_impl(__FILE__, __LINE__) > -void qemu_mutex_lock_iothread_impl(const char *file, int line); > +#define bql_lock() \ > + bql_lock_impl(__FILE__, __LINE__) > +void bql_lock_impl(const char *file, int line); > > /** > - * qemu_mutex_unlock_iothread: Unlock the main loop mutex. > + * bql_unlock: Unlock the Big QEMU Lock (BQL). > * > - * This function unlocks the main loop mutex. The mutex is taken by > + * This function unlocks the Big QEMU Lock. The lock is taken by > * main() in vl.c and always taken except while waiting on > - * external events (such as with select). The mutex should be unlocked > + * external events (such as with select). The lock should be unlocked > * as soon as possible by threads other than the main loop thread, > * because it prevents the main loop from processing callbacks, > * including timers and bottom halves. > * > - * NOTE: tools currently are single-threaded and > qemu_mutex_unlock_iothread > + * NOTE: tools currently are single-threaded and bql_unlock > * is a no-op there. > */ > -void qemu_mutex_unlock_iothread(void); > +void bql_unlock(void); > > /** > * QEMU_IOTHREAD_LOCK_GUARD > * > - * Wrap a block of code in a conditional > qemu_mutex_{lock,unlock}_iothread. > + * Wrap a block of code in a conditional bql_{lock,unlock}. > */ > typedef struct IOThreadLockAuto IOThreadLockAuto; > > static inline IOThreadLockAuto *qemu_iothread_auto_lock(const char *file, > int line) > { > - if (qemu_mutex_iothread_locked()) { > + if (bql_locked()) { > return NULL; > } > - qemu_mutex_lock_iothread_impl(file, line); > + bql_lock_impl(file, line); > /* Anything non-NULL causes the cleanup function to be called */ > return (IOThreadLockAuto *)(uintptr_t)1; > } > > static inline void qemu_iothread_auto_unlock(IOThreadLockAuto *l) > { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > G_DEFINE_AUTOPTR_CLEANUP_FUNC(IOThreadLockAuto, qemu_iothread_auto_unlock) > diff --git a/include/qemu/thread.h b/include/qemu/thread.h > index dd3822d7ce..fb74e21c08 100644 > --- a/include/qemu/thread.h > +++ b/include/qemu/thread.h > @@ -47,7 +47,7 @@ typedef void (*QemuCondWaitFunc)(QemuCond *c, QemuMutex > *m, const char *f, > typedef bool (*QemuCondTimedWaitFunc)(QemuCond *c, QemuMutex *m, int ms, > const char *f, int l); > > -extern QemuMutexLockFunc qemu_bql_mutex_lock_func; > +extern QemuMutexLockFunc bql_mutex_lock_func; > extern QemuMutexLockFunc qemu_mutex_lock_func; > extern QemuMutexTrylockFunc qemu_mutex_trylock_func; > extern QemuRecMutexLockFunc qemu_rec_mutex_lock_func; > diff --git a/accel/accel-blocker.c b/accel/accel-blocker.c > index 1e7f423462..e083f24aa8 100644 > --- a/accel/accel-blocker.c > +++ b/accel/accel-blocker.c > @@ -41,7 +41,7 @@ void accel_blocker_init(void) > > void accel_ioctl_begin(void) > { > - if (likely(qemu_mutex_iothread_locked())) { > + if (likely(bql_locked())) { > return; > } > > @@ -51,7 +51,7 @@ void accel_ioctl_begin(void) > > void accel_ioctl_end(void) > { > - if (likely(qemu_mutex_iothread_locked())) { > + if (likely(bql_locked())) { > return; > } > > @@ -62,7 +62,7 @@ void accel_ioctl_end(void) > > void accel_cpu_ioctl_begin(CPUState *cpu) > { > - if (unlikely(qemu_mutex_iothread_locked())) { > + if (unlikely(bql_locked())) { > return; > } > > @@ -72,7 +72,7 @@ void accel_cpu_ioctl_begin(CPUState *cpu) > > void accel_cpu_ioctl_end(CPUState *cpu) > { > - if (unlikely(qemu_mutex_iothread_locked())) { > + if (unlikely(bql_locked())) { > return; > } > > @@ -105,7 +105,7 @@ void accel_ioctl_inhibit_begin(void) > * We allow to inhibit only when holding the BQL, so we can identify > * when an inhibitor wants to issue an ioctl easily. > */ > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > /* Block further invocations of the ioctls outside the BQL. */ > CPU_FOREACH(cpu) { > diff --git a/accel/dummy-cpus.c b/accel/dummy-cpus.c > index b75c919ac3..f4b0ec5890 100644 > --- a/accel/dummy-cpus.c > +++ b/accel/dummy-cpus.c > @@ -24,7 +24,7 @@ static void *dummy_cpu_thread_fn(void *arg) > > rcu_register_thread(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_thread_get_self(cpu->thread); > cpu->thread_id = qemu_get_thread_id(); > cpu->neg.can_do_io = true; > @@ -43,7 +43,7 @@ static void *dummy_cpu_thread_fn(void *arg) > qemu_guest_random_seed_thread_part2(cpu->random_seed); > > do { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > #ifndef _WIN32 > do { > int sig; > @@ -56,11 +56,11 @@ static void *dummy_cpu_thread_fn(void *arg) > #else > qemu_sem_wait(&cpu->sem); > #endif > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_wait_io_event(cpu); > } while (!cpu->unplug); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > rcu_unregister_thread(); > return NULL; > } > diff --git a/accel/hvf/hvf-accel-ops.c b/accel/hvf/hvf-accel-ops.c > index abe7adf7ee..8eabb696fa 100644 > --- a/accel/hvf/hvf-accel-ops.c > +++ b/accel/hvf/hvf-accel-ops.c > @@ -424,7 +424,7 @@ static void *hvf_cpu_thread_fn(void *arg) > > rcu_register_thread(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_thread_get_self(cpu->thread); > > cpu->thread_id = qemu_get_thread_id(); > @@ -449,7 +449,7 @@ static void *hvf_cpu_thread_fn(void *arg) > > hvf_vcpu_destroy(cpu); > cpu_thread_signal_destroyed(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > rcu_unregister_thread(); > return NULL; > } > diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c > index 6195150a0b..45ff06e953 100644 > --- a/accel/kvm/kvm-accel-ops.c > +++ b/accel/kvm/kvm-accel-ops.c > @@ -33,7 +33,7 @@ static void *kvm_vcpu_thread_fn(void *arg) > > rcu_register_thread(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_thread_get_self(cpu->thread); > cpu->thread_id = qemu_get_thread_id(); > cpu->neg.can_do_io = true; > @@ -58,7 +58,7 @@ static void *kvm_vcpu_thread_fn(void *arg) > > kvm_destroy_vcpu(cpu); > cpu_thread_signal_destroyed(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > rcu_unregister_thread(); > return NULL; > } > diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c > index e39a810a4e..09404b897f 100644 > --- a/accel/kvm/kvm-all.c > +++ b/accel/kvm/kvm-all.c > @@ -817,7 +817,7 @@ static void kvm_dirty_ring_flush(void) > * should always be with BQL held, serialization is guaranteed. > * However, let's be sure of it. > */ > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > /* > * First make sure to flush the hardware buffers by kicking all > * vcpus out in a synchronous way. > @@ -1402,9 +1402,9 @@ static void *kvm_dirty_ring_reaper_thread(void *data) > trace_kvm_dirty_ring_reaper("wakeup"); > r->reaper_state = KVM_DIRTY_RING_REAPER_REAPING; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > kvm_dirty_ring_reap(s, NULL); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > r->reaper_iteration++; > } > @@ -2828,7 +2828,7 @@ int kvm_cpu_exec(CPUState *cpu) > return EXCP_HLT; > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > cpu_exec_start(cpu); > > do { > @@ -2868,11 +2868,11 @@ int kvm_cpu_exec(CPUState *cpu) > > #ifdef KVM_HAVE_MCE_INJECTION > if (unlikely(have_sigbus_pending)) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code, > pending_sigbus_addr); > have_sigbus_pending = false; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > > @@ -2942,7 +2942,7 @@ int kvm_cpu_exec(CPUState *cpu) > * still full. Got kicked by KVM_RESET_DIRTY_RINGS. > */ > trace_kvm_dirty_ring_full(cpu->cpu_index); > - qemu_mutex_lock_iothread(); > + bql_lock(); > /* > * We throttle vCPU by making it sleep once it exit from > kernel > * due to dirty ring full. In the dirtylimit scenario, reaping > @@ -2954,7 +2954,7 @@ int kvm_cpu_exec(CPUState *cpu) > } else { > kvm_dirty_ring_reap(kvm_state, NULL); > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > dirtylimit_vcpu_execute(cpu); > ret = 0; > break; > @@ -2970,9 +2970,9 @@ int kvm_cpu_exec(CPUState *cpu) > break; > case KVM_SYSTEM_EVENT_CRASH: > kvm_cpu_synchronize_state(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_system_guest_panicked(cpu_get_crash_info(cpu)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > ret = 0; > break; > default: > @@ -2989,7 +2989,7 @@ int kvm_cpu_exec(CPUState *cpu) > } while (ret == 0); > > cpu_exec_end(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > > if (ret < 0) { > cpu_dump_state(cpu, stderr, CPU_DUMP_CODE); > diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c > index c938eb96f8..67eda9865e 100644 > --- a/accel/tcg/cpu-exec.c > +++ b/accel/tcg/cpu-exec.c > @@ -558,8 +558,8 @@ static void cpu_exec_longjmp_cleanup(CPUState *cpu) > tcg_ctx->gen_tb = NULL; > } > #endif > - if (qemu_mutex_iothread_locked()) { > - qemu_mutex_unlock_iothread(); > + if (bql_locked()) { > + bql_unlock(); > } > assert_no_pages_locked(); > } > @@ -680,10 +680,10 @@ static inline bool cpu_handle_halt(CPUState *cpu) > #if defined(TARGET_I386) > if (cpu->interrupt_request & CPU_INTERRUPT_POLL) { > X86CPU *x86_cpu = X86_CPU(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > apic_poll_irq(x86_cpu->apic_state); > cpu_reset_interrupt(cpu, CPU_INTERRUPT_POLL); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif /* TARGET_I386 */ > if (!cpu_has_work(cpu)) { > @@ -749,9 +749,9 @@ static inline bool cpu_handle_exception(CPUState *cpu, > int *ret) > #else > if (replay_exception()) { > CPUClass *cc = CPU_GET_CLASS(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > cc->tcg_ops->do_interrupt(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > cpu->exception_index = -1; > > if (unlikely(cpu->singlestep_enabled)) { > @@ -812,7 +812,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, > > if (unlikely(qatomic_read(&cpu->interrupt_request))) { > int interrupt_request; > - qemu_mutex_lock_iothread(); > + bql_lock(); > interrupt_request = cpu->interrupt_request; > if (unlikely(cpu->singlestep_enabled & SSTEP_NOIRQ)) { > /* Mask out external interrupts for this step. */ > @@ -821,7 +821,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, > if (interrupt_request & CPU_INTERRUPT_DEBUG) { > cpu->interrupt_request &= ~CPU_INTERRUPT_DEBUG; > cpu->exception_index = EXCP_DEBUG; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return true; > } > #if !defined(CONFIG_USER_ONLY) > @@ -832,7 +832,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, > cpu->interrupt_request &= ~CPU_INTERRUPT_HALT; > cpu->halted = 1; > cpu->exception_index = EXCP_HLT; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return true; > } > #if defined(TARGET_I386) > @@ -843,14 +843,14 @@ static inline bool cpu_handle_interrupt(CPUState > *cpu, > cpu_svm_check_intercept_param(env, SVM_EXIT_INIT, 0, 0); > do_cpu_init(x86_cpu); > cpu->exception_index = EXCP_HALTED; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return true; > } > #else > else if (interrupt_request & CPU_INTERRUPT_RESET) { > replay_interrupt(); > cpu_reset(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return true; > } > #endif /* !TARGET_I386 */ > @@ -873,7 +873,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, > */ > if (unlikely(cpu->singlestep_enabled)) { > cpu->exception_index = EXCP_DEBUG; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return true; > } > cpu->exception_index = -1; > @@ -892,7 +892,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, > } > > /* If we exit via cpu_loop_exit/longjmp it is reset in cpu_exec */ > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > /* Finally, check if we need to exit to the main loop. */ > diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c > index db3f93fda9..5698a9fd8e 100644 > --- a/accel/tcg/cputlb.c > +++ b/accel/tcg/cputlb.c > @@ -2030,10 +2030,10 @@ static uint64_t do_ld_mmio_beN(CPUState *cpu, > CPUTLBEntryFull *full, > section = io_prepare(&mr_offset, cpu, full->xlat_section, attrs, > addr, ra); > mr = section->mr; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = int_ld_mmio_beN(cpu, full, ret_be, addr, size, mmu_idx, > type, ra, mr, mr_offset); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return ret; > } > @@ -2054,12 +2054,12 @@ static Int128 do_ld16_mmio_beN(CPUState *cpu, > CPUTLBEntryFull *full, > section = io_prepare(&mr_offset, cpu, full->xlat_section, attrs, > addr, ra); > mr = section->mr; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > a = int_ld_mmio_beN(cpu, full, ret_be, addr, size - 8, mmu_idx, > MMU_DATA_LOAD, ra, mr, mr_offset); > b = int_ld_mmio_beN(cpu, full, ret_be, addr + size - 8, 8, mmu_idx, > MMU_DATA_LOAD, ra, mr, mr_offset + size - 8); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return int128_make128(b, a); > } > @@ -2577,10 +2577,10 @@ static uint64_t do_st_mmio_leN(CPUState *cpu, > CPUTLBEntryFull *full, > section = io_prepare(&mr_offset, cpu, full->xlat_section, attrs, > addr, ra); > mr = section->mr; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = int_st_mmio_leN(cpu, full, val_le, addr, size, mmu_idx, > ra, mr, mr_offset); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return ret; > } > @@ -2601,12 +2601,12 @@ static uint64_t do_st16_mmio_leN(CPUState *cpu, > CPUTLBEntryFull *full, > section = io_prepare(&mr_offset, cpu, full->xlat_section, attrs, > addr, ra); > mr = section->mr; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > int_st_mmio_leN(cpu, full, int128_getlo(val_le), addr, 8, > mmu_idx, ra, mr, mr_offset); > ret = int_st_mmio_leN(cpu, full, int128_gethi(val_le), addr + 8, > size - 8, mmu_idx, ra, mr, mr_offset + 8); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return ret; > } > diff --git a/accel/tcg/tcg-accel-ops-icount.c > b/accel/tcg/tcg-accel-ops-icount.c > index b25685fb71..5824d92580 100644 > --- a/accel/tcg/tcg-accel-ops-icount.c > +++ b/accel/tcg/tcg-accel-ops-icount.c > @@ -126,9 +126,9 @@ void icount_prepare_for_run(CPUState *cpu, int64_t > cpu_budget) > * We're called without the iothread lock, so must take it while > * we're calling timer handlers. > */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > icount_notify_aio_contexts(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > > diff --git a/accel/tcg/tcg-accel-ops-mttcg.c > b/accel/tcg/tcg-accel-ops-mttcg.c > index fac80095bb..af7307013a 100644 > --- a/accel/tcg/tcg-accel-ops-mttcg.c > +++ b/accel/tcg/tcg-accel-ops-mttcg.c > @@ -76,7 +76,7 @@ static void *mttcg_cpu_thread_fn(void *arg) > rcu_add_force_rcu_notifier(&force_rcu.notifier); > tcg_register_thread(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_thread_get_self(cpu->thread); > > cpu->thread_id = qemu_get_thread_id(); > @@ -91,9 +91,9 @@ static void *mttcg_cpu_thread_fn(void *arg) > do { > if (cpu_can_run(cpu)) { > int r; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > r = tcg_cpus_exec(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > switch (r) { > case EXCP_DEBUG: > cpu_handle_guest_debug(cpu); > @@ -105,9 +105,9 @@ static void *mttcg_cpu_thread_fn(void *arg) > */ > break; > case EXCP_ATOMIC: > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > cpu_exec_step_atomic(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > default: > /* Ignore everything else? */ > break; > @@ -119,7 +119,7 @@ static void *mttcg_cpu_thread_fn(void *arg) > } while (!cpu->unplug || cpu_can_run(cpu)); > > tcg_cpus_destroy(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > rcu_remove_force_rcu_notifier(&force_rcu.notifier); > rcu_unregister_thread(); > return NULL; > diff --git a/accel/tcg/tcg-accel-ops-rr.c b/accel/tcg/tcg-accel-ops-rr.c > index 611932f3c3..c4ea372a3f 100644 > --- a/accel/tcg/tcg-accel-ops-rr.c > +++ b/accel/tcg/tcg-accel-ops-rr.c > @@ -188,7 +188,7 @@ static void *rr_cpu_thread_fn(void *arg) > rcu_add_force_rcu_notifier(&force_rcu); > tcg_register_thread(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_thread_get_self(cpu->thread); > > cpu->thread_id = qemu_get_thread_id(); > @@ -218,9 +218,9 @@ static void *rr_cpu_thread_fn(void *arg) > /* Only used for icount_enabled() */ > int64_t cpu_budget = 0; > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > replay_mutex_lock(); > - qemu_mutex_lock_iothread(); > + bql_lock(); > > if (icount_enabled()) { > int cpu_count = rr_cpu_count(); > @@ -254,7 +254,7 @@ static void *rr_cpu_thread_fn(void *arg) > if (cpu_can_run(cpu)) { > int r; > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > if (icount_enabled()) { > icount_prepare_for_run(cpu, cpu_budget); > } > @@ -262,15 +262,15 @@ static void *rr_cpu_thread_fn(void *arg) > if (icount_enabled()) { > icount_process_data(cpu); > } > - qemu_mutex_lock_iothread(); > + bql_lock(); > > if (r == EXCP_DEBUG) { > cpu_handle_guest_debug(cpu); > break; > } else if (r == EXCP_ATOMIC) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > cpu_exec_step_atomic(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > break; > } > } else if (cpu->stop) { > diff --git a/accel/tcg/tcg-accel-ops.c b/accel/tcg/tcg-accel-ops.c > index 1b57290682..813065c0ec 100644 > --- a/accel/tcg/tcg-accel-ops.c > +++ b/accel/tcg/tcg-accel-ops.c > @@ -88,7 +88,7 @@ static void tcg_cpu_reset_hold(CPUState *cpu) > /* mask must never be zero, except for A20 change call */ > void tcg_handle_interrupt(CPUState *cpu, int mask) > { > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > cpu->interrupt_request |= mask; > > diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c > index 79a88f5fb7..1737bb3da5 100644 > --- a/accel/tcg/translate-all.c > +++ b/accel/tcg/translate-all.c > @@ -649,7 +649,7 @@ void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr) > > void cpu_interrupt(CPUState *cpu, int mask) > { > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > cpu->interrupt_request |= mask; > qatomic_set(&cpu->neg.icount_decr.u16.high, -1); > } > diff --git a/cpu-common.c b/cpu-common.c > index c81fd72d16..ce78273af5 100644 > --- a/cpu-common.c > +++ b/cpu-common.c > @@ -351,11 +351,11 @@ void process_queued_cpu_work(CPUState *cpu) > * BQL, so it goes to sleep; start_exclusive() is sleeping > too, so > * neither CPU can proceed. > */ > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > start_exclusive(); > wi->func(cpu, wi->data); > end_exclusive(); > - qemu_mutex_lock_iothread(); > + bql_lock(); > } else { > wi->func(cpu, wi->data); > } > diff --git a/dump/dump.c b/dump/dump.c > index 4819050764..84064d890d 100644 > --- a/dump/dump.c > +++ b/dump/dump.c > @@ -108,11 +108,11 @@ static int dump_cleanup(DumpState *s) > s->guest_note = NULL; > if (s->resume) { > if (s->detached) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > vm_start(); > if (s->detached) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > migrate_del_blocker(&dump_migration_blocker); > diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c > index 82dae51a55..a59e2ce645 100644 > --- a/hw/core/cpu-common.c > +++ b/hw/core/cpu-common.c > @@ -70,14 +70,14 @@ CPUState *cpu_create(const char *typename) > * BQL here if we need to. cpu_interrupt assumes it is held.*/ > void cpu_reset_interrupt(CPUState *cpu, int mask) > { > - bool need_lock = !qemu_mutex_iothread_locked(); > + bool need_lock = !bql_locked(); > > if (need_lock) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > cpu->interrupt_request &= ~mask; > if (need_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > > diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c > index 5085a6fee3..7e310109cf 100644 > --- a/hw/i386/intel_iommu.c > +++ b/hw/i386/intel_iommu.c > @@ -1665,7 +1665,7 @@ static bool vtd_switch_address_space(VTDAddressSpace > *as) > { > bool use_iommu, pt; > /* Whether we need to take the BQL on our own */ > - bool take_bql = !qemu_mutex_iothread_locked(); > + bool take_bql = !bql_locked(); > > assert(as); > > @@ -1683,7 +1683,7 @@ static bool vtd_switch_address_space(VTDAddressSpace > *as) > * it. We'd better make sure we have had it already, or, take it. > */ > if (take_bql) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > /* Turn off first then on the other */ > @@ -1738,7 +1738,7 @@ static bool vtd_switch_address_space(VTDAddressSpace > *as) > } > > if (take_bql) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > return use_iommu; > diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c > index 02b8cbf8df..d7d15cfaf7 100644 > --- a/hw/i386/kvm/xen_evtchn.c > +++ b/hw/i386/kvm/xen_evtchn.c > @@ -425,7 +425,7 @@ void xen_evtchn_set_callback_level(int level) > * effect immediately. That just leaves interdomain loopback as the > case > * which uses the BH. > */ > - if (!qemu_mutex_iothread_locked()) { > + if (!bql_locked()) { > qemu_bh_schedule(s->gsi_bh); > return; > } > @@ -459,7 +459,7 @@ int xen_evtchn_set_callback_param(uint64_t param) > * We need the BQL because set_callback_pci_intx() may call into PCI > code, > * and because we may need to manipulate the old and new GSI levels. > */ > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > qemu_mutex_lock(&s->port_lock); > > switch (type) { > @@ -1037,7 +1037,7 @@ static int close_port(XenEvtchnState *s, > evtchn_port_t port, > XenEvtchnPort *p = &s->port_table[port]; > > /* Because it *might* be a PIRQ port */ > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > switch (p->type) { > case EVTCHNSTAT_closed: > @@ -1104,7 +1104,7 @@ int xen_evtchn_soft_reset(void) > return -ENOTSUP; > } > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > qemu_mutex_lock(&s->port_lock); > > @@ -1601,7 +1601,7 @@ bool xen_evtchn_set_gsi(int gsi, int level) > XenEvtchnState *s = xen_evtchn_singleton; > int pirq; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > if (!s || gsi < 0 || gsi >= IOAPIC_NUM_PINS) { > return false; > @@ -1712,7 +1712,7 @@ void xen_evtchn_snoop_msi(PCIDevice *dev, bool > is_msix, unsigned int vector, > return; > } > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > pirq = msi_pirq_target(addr, data); > > @@ -1749,7 +1749,7 @@ int xen_evtchn_translate_pirq_msi(struct > kvm_irq_routing_entry *route, > return 1; /* Not a PIRQ */ > } > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > pirq = msi_pirq_target(address, data); > if (!pirq || pirq >= s->nr_pirqs) { > @@ -1796,7 +1796,7 @@ bool xen_evtchn_deliver_pirq_msi(uint64_t address, > uint32_t data) > return false; > } > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > pirq = msi_pirq_target(address, data); > if (!pirq || pirq >= s->nr_pirqs) { > diff --git a/hw/i386/kvm/xen_overlay.c b/hw/i386/kvm/xen_overlay.c > index 39fda1b72c..1722294638 100644 > --- a/hw/i386/kvm/xen_overlay.c > +++ b/hw/i386/kvm/xen_overlay.c > @@ -194,7 +194,7 @@ int xen_overlay_map_shinfo_page(uint64_t gpa) > return -ENOENT; > } > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > if (s->shinfo_gpa) { > /* If removing shinfo page, turn the kernel magic off first */ > diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c > index 6e651960b3..ae27889a3f 100644 > --- a/hw/i386/kvm/xen_xenstore.c > +++ b/hw/i386/kvm/xen_xenstore.c > @@ -1341,7 +1341,7 @@ static void fire_watch_cb(void *opaque, const char > *path, const char *token) > { > XenXenstoreState *s = opaque; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > /* > * If there's a response pending, we obviously can't scribble over > diff --git a/hw/intc/arm_gicv3_cpuif.c b/hw/intc/arm_gicv3_cpuif.c > index ab1a00508e..77c2a6dd3b 100644 > --- a/hw/intc/arm_gicv3_cpuif.c > +++ b/hw/intc/arm_gicv3_cpuif.c > @@ -934,7 +934,7 @@ void gicv3_cpuif_update(GICv3CPUState *cs) > ARMCPU *cpu = ARM_CPU(cs->cpu); > CPUARMState *env = &cpu->env; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > trace_gicv3_cpuif_update(gicv3_redist_affid(cs), cs->hppi.irq, > cs->hppi.grp, cs->hppi.prio); > diff --git a/hw/intc/s390_flic.c b/hw/intc/s390_flic.c > index 74e02858d4..93b8531ad0 100644 > --- a/hw/intc/s390_flic.c > +++ b/hw/intc/s390_flic.c > @@ -106,7 +106,7 @@ static int qemu_s390_clear_io_flic(S390FLICState *fs, > uint16_t subchannel_id, > QEMUS390FlicIO *cur, *next; > uint8_t isc; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > if (!(flic->pending & FLIC_PENDING_IO)) { > return 0; > } > @@ -223,7 +223,7 @@ uint32_t > qemu_s390_flic_dequeue_service(QEMUS390FLICState *flic) > { > uint32_t tmp; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > g_assert(flic->pending & FLIC_PENDING_SERVICE); > tmp = flic->service_param; > flic->service_param = 0; > @@ -238,7 +238,7 @@ QEMUS390FlicIO > *qemu_s390_flic_dequeue_io(QEMUS390FLICState *flic, uint64_t cr6) > QEMUS390FlicIO *io; > uint8_t isc; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > if (!(flic->pending & CR6_TO_PENDING_IO(cr6))) { > return NULL; > } > @@ -262,7 +262,7 @@ QEMUS390FlicIO > *qemu_s390_flic_dequeue_io(QEMUS390FLICState *flic, uint64_t cr6) > > void qemu_s390_flic_dequeue_crw_mchk(QEMUS390FLICState *flic) > { > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > g_assert(flic->pending & FLIC_PENDING_MCHK_CR); > flic->pending &= ~FLIC_PENDING_MCHK_CR; > } > @@ -271,7 +271,7 @@ static void qemu_s390_inject_service(S390FLICState > *fs, uint32_t parm) > { > QEMUS390FLICState *flic = s390_get_qemu_flic(fs); > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > /* multiplexing is good enough for sclp - kvm does it internally as > well */ > flic->service_param |= parm; > flic->pending |= FLIC_PENDING_SERVICE; > @@ -287,7 +287,7 @@ static void qemu_s390_inject_io(S390FLICState *fs, > uint16_t subchannel_id, > QEMUS390FLICState *flic = s390_get_qemu_flic(fs); > QEMUS390FlicIO *io; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > io = g_new0(QEMUS390FlicIO, 1); > io->id = subchannel_id; > io->nr = subchannel_nr; > @@ -304,7 +304,7 @@ static void qemu_s390_inject_crw_mchk(S390FLICState > *fs) > { > QEMUS390FLICState *flic = s390_get_qemu_flic(fs); > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > flic->pending |= FLIC_PENDING_MCHK_CR; > > qemu_s390_flic_notify(FLIC_PENDING_MCHK_CR); > @@ -330,7 +330,7 @@ bool qemu_s390_flic_has_crw_mchk(QEMUS390FLICState > *flic) > > bool qemu_s390_flic_has_any(QEMUS390FLICState *flic) > { > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > return !!flic->pending; > } > > @@ -340,7 +340,7 @@ static void qemu_s390_flic_reset(DeviceState *dev) > QEMUS390FlicIO *cur, *next; > int isc; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > flic->simm = 0; > flic->nimm = 0; > flic->pending = 0; > diff --git a/hw/misc/edu.c b/hw/misc/edu.c > index a1f8bc77e7..fa05bdd4f3 100644 > --- a/hw/misc/edu.c > +++ b/hw/misc/edu.c > @@ -355,9 +355,9 @@ static void *edu_fact_thread(void *opaque) > smp_mb__after_rmw(); > > if (qatomic_read(&edu->status) & EDU_STATUS_IRQFACT) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > edu_raise_irq(edu, FACT_IRQ); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > > diff --git a/hw/misc/imx6_src.c b/hw/misc/imx6_src.c > index a9c64d06eb..2b9bb07540 100644 > --- a/hw/misc/imx6_src.c > +++ b/hw/misc/imx6_src.c > @@ -131,7 +131,7 @@ static void imx6_clear_reset_bit(CPUState *cpu, > run_on_cpu_data data) > struct SRCSCRResetInfo *ri = data.host_ptr; > IMX6SRCState *s = ri->s; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > s->regs[SRC_SCR] = deposit32(s->regs[SRC_SCR], ri->reset_bit, 1, 0); > DPRINTF("reg[%s] <= 0x%" PRIx32 "\n", > diff --git a/hw/misc/imx7_src.c b/hw/misc/imx7_src.c > index 983251e86f..77ad7a7eef 100644 > --- a/hw/misc/imx7_src.c > +++ b/hw/misc/imx7_src.c > @@ -136,7 +136,7 @@ static void imx7_clear_reset_bit(CPUState *cpu, > run_on_cpu_data data) > struct SRCSCRResetInfo *ri = data.host_ptr; > IMX7SRCState *s = ri->s; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > s->regs[SRC_A7RCR0] = deposit32(s->regs[SRC_A7RCR0], ri->reset_bit, > 1, 0); > > diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c > index 1e2b3baeb1..453fdb9819 100644 > --- a/hw/net/xen_nic.c > +++ b/hw/net/xen_nic.c > @@ -133,7 +133,7 @@ static bool net_tx_packets(struct XenNetDev *netdev) > void *page; > void *tmpbuf = NULL; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > for (;;) { > rc = netdev->tx_ring.req_cons; > @@ -260,7 +260,7 @@ static ssize_t net_rx_packet(NetClientState *nc, const > uint8_t *buf, size_t size > RING_IDX rc, rp; > void *page; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > if (xen_device_backend_get_state(&netdev->xendev) != > XenbusStateConnected) { > return -1; > @@ -354,7 +354,7 @@ static bool xen_netdev_connect(XenDevice *xendev, > Error **errp) > XenNetDev *netdev = XEN_NET_DEVICE(xendev); > unsigned int port, rx_copy; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > if (xen_device_frontend_scanf(xendev, "tx-ring-ref", "%u", > &netdev->tx_ring_ref) != 1) { > @@ -425,7 +425,7 @@ static void xen_netdev_disconnect(XenDevice *xendev, > Error **errp) > > trace_xen_netdev_disconnect(netdev->dev); > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > netdev->tx_ring.sring = NULL; > netdev->rx_ring.sring = NULL; > diff --git a/hw/ppc/pegasos2.c b/hw/ppc/pegasos2.c > index 3203a4a728..d84f3f977d 100644 > --- a/hw/ppc/pegasos2.c > +++ b/hw/ppc/pegasos2.c > @@ -515,7 +515,7 @@ static void pegasos2_hypercall(PPCVirtualHypervisor > *vhyp, PowerPCCPU *cpu) > CPUPPCState *env = &cpu->env; > > /* The TCG path should also be holding the BQL at this point */ > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > if (FIELD_EX64(env->msr, MSR, PR)) { > qemu_log_mask(LOG_GUEST_ERROR, "Hypercall made with MSR[PR]=1\n"); > diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c > index be167710a3..b6581c16fc 100644 > --- a/hw/ppc/ppc.c > +++ b/hw/ppc/ppc.c > @@ -314,7 +314,7 @@ void store_40x_dbcr0(CPUPPCState *env, uint32_t val) > { > PowerPCCPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > switch ((val >> 28) & 0x3) { > case 0x0: > @@ -334,7 +334,7 @@ void store_40x_dbcr0(CPUPPCState *env, uint32_t val) > break; > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > /* PowerPC 40x internal IRQ controller */ > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c > index df09aa9d6a..0620912f9c 100644 > --- a/hw/ppc/spapr.c > +++ b/hw/ppc/spapr.c > @@ -1304,7 +1304,7 @@ static void > emulate_spapr_hypercall(PPCVirtualHypervisor *vhyp, > CPUPPCState *env = &cpu->env; > > /* The TCG path should also be holding the BQL at this point */ > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > g_assert(!vhyp_cpu_in_nested(cpu)); > > diff --git a/hw/ppc/spapr_rng.c b/hw/ppc/spapr_rng.c > index df5c4b9687..c2fda7ad20 100644 > --- a/hw/ppc/spapr_rng.c > +++ b/hw/ppc/spapr_rng.c > @@ -82,9 +82,9 @@ static target_ulong h_random(PowerPCCPU *cpu, > SpaprMachineState *spapr, > while (hrdata.received < 8) { > rng_backend_request_entropy(rngstate->backend, 8 - > hrdata.received, > random_recv, &hrdata); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > qemu_sem_wait(&hrdata.sem); > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > qemu_sem_destroy(&hrdata.sem); > diff --git a/hw/ppc/spapr_softmmu.c b/hw/ppc/spapr_softmmu.c > index 278666317e..fc1bbc0b61 100644 > --- a/hw/ppc/spapr_softmmu.c > +++ b/hw/ppc/spapr_softmmu.c > @@ -334,7 +334,7 @@ static void *hpt_prepare_thread(void *opaque) > pending->ret = H_NO_MEM; > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > if (SPAPR_MACHINE(qdev_get_machine())->pending_hpt == pending) { > /* Ready to go */ > @@ -344,7 +344,7 @@ static void *hpt_prepare_thread(void *opaque) > free_pending_hpt(pending); > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return NULL; > } > > diff --git a/hw/remote/mpqemu-link.c b/hw/remote/mpqemu-link.c > index 9bd98e8219..d04ac93621 100644 > --- a/hw/remote/mpqemu-link.c > +++ b/hw/remote/mpqemu-link.c > @@ -33,7 +33,7 @@ > */ > bool mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, Error **errp) > { > - bool iolock = qemu_mutex_iothread_locked(); > + bool drop_bql = bql_locked(); > bool iothread = qemu_in_iothread(); > struct iovec send[2] = {}; > int *fds = NULL; > @@ -63,8 +63,8 @@ bool mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, > Error **errp) > * for IOThread case. > * Also skip lock handling while in a co-routine in the main context. > */ > - if (iolock && !iothread && !qemu_in_coroutine()) { > - qemu_mutex_unlock_iothread(); > + if (drop_bql && !iothread && !qemu_in_coroutine()) { > + bql_unlock(); > } > > if (!qio_channel_writev_full_all(ioc, send, G_N_ELEMENTS(send), > @@ -74,9 +74,9 @@ bool mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, > Error **errp) > trace_mpqemu_send_io_error(msg->cmd, msg->size, nfds); > } > > - if (iolock && !iothread && !qemu_in_coroutine()) { > + if (drop_bql && !iothread && !qemu_in_coroutine()) { > /* See above comment why skip locking here. */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > return ret; > @@ -96,7 +96,7 @@ static ssize_t mpqemu_read(QIOChannel *ioc, void *buf, > size_t len, int **fds, > size_t *nfds, Error **errp) > { > struct iovec iov = { .iov_base = buf, .iov_len = len }; > - bool iolock = qemu_mutex_iothread_locked(); > + bool drop_bql = bql_locked(); > bool iothread = qemu_in_iothread(); > int ret = -1; > > @@ -106,14 +106,14 @@ static ssize_t mpqemu_read(QIOChannel *ioc, void > *buf, size_t len, int **fds, > */ > assert(qemu_in_coroutine() || !iothread); > > - if (iolock && !iothread && !qemu_in_coroutine()) { > - qemu_mutex_unlock_iothread(); > + if (drop_bql && !iothread && !qemu_in_coroutine()) { > + bql_unlock(); > } > > ret = qio_channel_readv_full_all_eof(ioc, &iov, 1, fds, nfds, errp); > > - if (iolock && !iothread && !qemu_in_coroutine()) { > - qemu_mutex_lock_iothread(); > + if (drop_bql && !iothread && !qemu_in_coroutine()) { > + bql_lock(); > } > > return (ret <= 0) ? ret : iov.iov_len; > diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c > index 8b10c32a3c..d9b879e056 100644 > --- a/hw/remote/vfio-user-obj.c > +++ b/hw/remote/vfio-user-obj.c > @@ -400,7 +400,7 @@ static int vfu_object_mr_rw(MemoryRegion *mr, uint8_t > *buf, hwaddr offset, > } > > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > release_lock = false; > } > > diff --git a/hw/s390x/s390-skeys.c b/hw/s390x/s390-skeys.c > index 8f5159d85d..5c535d483e 100644 > --- a/hw/s390x/s390-skeys.c > +++ b/hw/s390x/s390-skeys.c > @@ -153,7 +153,7 @@ void qmp_dump_skeys(const char *filename, Error **errp) > goto out; > } > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > guest_phys_blocks_init(&guest_phys_blocks); > guest_phys_blocks_append(&guest_phys_blocks); > > diff --git a/migration/block-dirty-bitmap.c > b/migration/block-dirty-bitmap.c > index 24347ab0f7..92e031b6fa 100644 > --- a/migration/block-dirty-bitmap.c > +++ b/migration/block-dirty-bitmap.c > @@ -774,7 +774,7 @@ static void dirty_bitmap_state_pending(void *opaque, > SaveBitmapState *dbms; > uint64_t pending = 0; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > QSIMPLEQ_FOREACH(dbms, &s->dbms_list, entry) { > uint64_t gran = bdrv_dirty_bitmap_granularity(dbms->bitmap); > @@ -784,7 +784,7 @@ static void dirty_bitmap_state_pending(void *opaque, > pending += DIV_ROUND_UP(sectors * BDRV_SECTOR_SIZE, gran); > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > trace_dirty_bitmap_state_pending(pending); > > diff --git a/migration/block.c b/migration/block.c > index a15f9bddcb..4a675b92bc 100644 > --- a/migration/block.c > +++ b/migration/block.c > @@ -269,7 +269,7 @@ static int mig_save_device_bulk(QEMUFile *f, > BlkMigDevState *bmds) > int64_t count; > > if (bmds->shared_base) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > aio_context_acquire(blk_get_aio_context(bb)); > /* Skip unallocated sectors; intentionally treats failure or > * partial sector as an allocated sector */ > @@ -282,7 +282,7 @@ static int mig_save_device_bulk(QEMUFile *f, > BlkMigDevState *bmds) > cur_sector += count >> BDRV_SECTOR_BITS; > } > aio_context_release(blk_get_aio_context(bb)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > if (cur_sector >= total_sectors) { > @@ -321,14 +321,14 @@ static int mig_save_device_bulk(QEMUFile *f, > BlkMigDevState *bmds) > * This is ugly and will disappear when we make bdrv_* thread-safe, > * without the need to acquire the AioContext. > */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > aio_context_acquire(blk_get_aio_context(bmds->blk)); > bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, cur_sector * > BDRV_SECTOR_SIZE, > nr_sectors * BDRV_SECTOR_SIZE); > blk->aiocb = blk_aio_preadv(bb, cur_sector * BDRV_SECTOR_SIZE, > &blk->qiov, > 0, blk_mig_read_cb, blk); > aio_context_release(blk_get_aio_context(bmds->blk)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > bmds->cur_sector = cur_sector + nr_sectors; > return (bmds->cur_sector >= total_sectors); > @@ -786,9 +786,9 @@ static int block_save_iterate(QEMUFile *f, void > *opaque) > /* Always called with iothread lock taken for > * simplicity, block_save_complete also calls it. > */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = blk_mig_save_dirty_block(f, 1); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > if (ret < 0) { > return ret; > @@ -860,9 +860,9 @@ static void block_state_pending(void *opaque, uint64_t > *must_precopy, > /* Estimate pending number of bytes to send */ > uint64_t pending; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > pending = get_remaining_dirty(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > blk_mig_lock(); > pending += block_mig_state.submitted * BLK_MIG_BLOCK_SIZE + > diff --git a/migration/colo.c b/migration/colo.c > index 4447e34914..2a74efdd77 100644 > --- a/migration/colo.c > +++ b/migration/colo.c > @@ -420,13 +420,13 @@ static int > colo_do_checkpoint_transaction(MigrationState *s, > qio_channel_io_seek(QIO_CHANNEL(bioc), 0, 0, NULL); > bioc->usage = 0; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > if (failover_get_state() != FAILOVER_STATUS_NONE) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > goto out; > } > vm_stop_force_state(RUN_STATE_COLO); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > trace_colo_vm_state_change("run", "stop"); > /* > * Failover request bh could be called after vm_stop_force_state(), > @@ -435,23 +435,23 @@ static int > colo_do_checkpoint_transaction(MigrationState *s, > if (failover_get_state() != FAILOVER_STATUS_NONE) { > goto out; > } > - qemu_mutex_lock_iothread(); > + bql_lock(); > > replication_do_checkpoint_all(&local_err); > if (local_err) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > goto out; > } > > colo_send_message(s->to_dst_file, COLO_MESSAGE_VMSTATE_SEND, > &local_err); > if (local_err) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > goto out; > } > /* Note: device state is saved into buffer */ > ret = qemu_save_device_state(fb); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > if (ret < 0) { > goto out; > } > @@ -504,9 +504,9 @@ static int > colo_do_checkpoint_transaction(MigrationState *s, > > ret = 0; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > vm_start(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > trace_colo_vm_state_change("stop", "run"); > > out: > @@ -557,15 +557,15 @@ static void colo_process_checkpoint(MigrationState > *s) > fb = qemu_file_new_output(QIO_CHANNEL(bioc)); > object_unref(OBJECT(bioc)); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > replication_start_all(REPLICATION_MODE_PRIMARY, &local_err); > if (local_err) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > goto out; > } > > vm_start(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > trace_colo_vm_state_change("stop", "run"); > > timer_mod(s->colo_delay_timer, qemu_clock_get_ms(QEMU_CLOCK_HOST) + > @@ -639,14 +639,14 @@ out: > > void migrate_start_colo_process(MigrationState *s) > { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > qemu_event_init(&s->colo_checkpoint_event, false); > s->colo_delay_timer = timer_new_ms(QEMU_CLOCK_HOST, > colo_checkpoint_notify, s); > > qemu_sem_init(&s->colo_exit_sem, 0); > colo_process_checkpoint(s); > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, > @@ -657,9 +657,9 @@ static void > colo_incoming_process_checkpoint(MigrationIncomingState *mis, > Error *local_err = NULL; > int ret; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > vm_stop_force_state(RUN_STATE_COLO); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > trace_colo_vm_state_change("run", "stop"); > > /* FIXME: This is unnecessary for periodic checkpoint mode */ > @@ -677,10 +677,10 @@ static void > colo_incoming_process_checkpoint(MigrationIncomingState *mis, > return; > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_synchronize_all_states(); > ret = qemu_loadvm_state_main(mis->from_src_file, mis); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > if (ret < 0) { > error_setg(errp, "Load VM's live state (ram) error"); > @@ -719,14 +719,14 @@ static void > colo_incoming_process_checkpoint(MigrationIncomingState *mis, > return; > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > vmstate_loading = true; > colo_flush_ram_cache(); > ret = qemu_load_device_state(fb); > if (ret < 0) { > error_setg(errp, "COLO: load device state failed"); > vmstate_loading = false; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return; > } > > @@ -734,7 +734,7 @@ static void > colo_incoming_process_checkpoint(MigrationIncomingState *mis, > if (local_err) { > error_propagate(errp, local_err); > vmstate_loading = false; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return; > } > > @@ -743,7 +743,7 @@ static void > colo_incoming_process_checkpoint(MigrationIncomingState *mis, > if (local_err) { > error_propagate(errp, local_err); > vmstate_loading = false; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return; > } > /* Notify all filters of all NIC to do checkpoint */ > @@ -752,13 +752,13 @@ static void > colo_incoming_process_checkpoint(MigrationIncomingState *mis, > if (local_err) { > error_propagate(errp, local_err); > vmstate_loading = false; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return; > } > > vmstate_loading = false; > vm_start(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > trace_colo_vm_state_change("stop", "run"); > > if (failover_get_state() == FAILOVER_STATUS_RELAUNCH) { > @@ -851,14 +851,14 @@ static void *colo_process_incoming_thread(void > *opaque) > fb = qemu_file_new_input(QIO_CHANNEL(bioc)); > object_unref(OBJECT(bioc)); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > replication_start_all(REPLICATION_MODE_SECONDARY, &local_err); > if (local_err) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > goto out; > } > vm_start(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > trace_colo_vm_state_change("stop", "run"); > > colo_send_message(mis->to_src_file, COLO_MESSAGE_CHECKPOINT_READY, > @@ -920,7 +920,7 @@ int coroutine_fn colo_incoming_co(void) > Error *local_err = NULL; > QemuThread th; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > if (!migration_incoming_colo_enabled()) { > return 0; > @@ -940,10 +940,10 @@ int coroutine_fn colo_incoming_co(void) > qemu_coroutine_yield(); > mis->colo_incoming_co = NULL; > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > /* Wait checkpoint incoming thread exit before free resource */ > qemu_thread_join(&th); > - qemu_mutex_lock_iothread(); > + bql_lock(); > > /* We hold the global iothread lock, so it is safe here */ > colo_release_ram_cache(); > diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c > index 036ac017fc..429d10c4d9 100644 > --- a/migration/dirtyrate.c > +++ b/migration/dirtyrate.c > @@ -90,13 +90,13 @@ static int64_t do_calculate_dirtyrate(DirtyPageRecord > dirty_pages, > > void global_dirty_log_change(unsigned int flag, bool start) > { > - qemu_mutex_lock_iothread(); > + bql_lock(); > if (start) { > memory_global_dirty_log_start(flag); > } else { > memory_global_dirty_log_stop(flag); > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > /* > @@ -106,12 +106,12 @@ void global_dirty_log_change(unsigned int flag, bool > start) > */ > static void global_dirty_log_sync(unsigned int flag, bool one_shot) > { > - qemu_mutex_lock_iothread(); > + bql_lock(); > memory_global_dirty_log_sync(false); > if (one_shot) { > memory_global_dirty_log_stop(flag); > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > static DirtyPageRecord *vcpu_dirty_stat_alloc(VcpuStat *stat) > @@ -610,7 +610,7 @@ static void calculate_dirtyrate_dirty_bitmap(struct > DirtyRateConfig config) > int64_t start_time; > DirtyPageRecord dirty_pages; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > memory_global_dirty_log_start(GLOBAL_DIRTY_DIRTY_RATE); > > /* > @@ -627,7 +627,7 @@ static void calculate_dirtyrate_dirty_bitmap(struct > DirtyRateConfig config) > * KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE cap is enabled. > */ > dirtyrate_manual_reset_protect(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > record_dirtypages_bitmap(&dirty_pages, true); > > diff --git a/migration/migration.c b/migration/migration.c > index 3ce04b2aaf..be74c714d6 100644 > --- a/migration/migration.c > +++ b/migration/migration.c > @@ -1294,12 +1294,12 @@ static void migrate_fd_cleanup(MigrationState *s) > QEMUFile *tmp; > > trace_migrate_fd_cleanup(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > if (s->migration_thread_running) { > qemu_thread_join(&s->thread); > s->migration_thread_running = false; > } > - qemu_mutex_lock_iothread(); > + bql_lock(); > > multifd_save_cleanup(); > qemu_mutex_lock(&s->qemu_file_lock); > @@ -2411,7 +2411,7 @@ static int postcopy_start(MigrationState *ms, Error > **errp) > } > > trace_postcopy_start(); > - qemu_mutex_lock_iothread(); > + bql_lock(); > trace_postcopy_start_set_run(); > > migration_downtime_start(ms); > @@ -2520,7 +2520,7 @@ static int postcopy_start(MigrationState *ms, Error > **errp) > > migration_downtime_end(ms); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > if (migrate_postcopy_ram()) { > /* > @@ -2561,7 +2561,7 @@ fail: > error_report_err(local_err); > } > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return -1; > } > > @@ -2595,14 +2595,14 @@ static int migration_maybe_pause(MigrationState *s, > * wait for the 'pause_sem' semaphore. > */ > if (s->state != MIGRATION_STATUS_CANCELLING) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > migrate_set_state(&s->state, *current_active_state, > MIGRATION_STATUS_PRE_SWITCHOVER); > qemu_sem_wait(&s->pause_sem); > migrate_set_state(&s->state, MIGRATION_STATUS_PRE_SWITCHOVER, > new_state); > *current_active_state = new_state; > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > return s->state == new_state ? 0 : -EINVAL; > @@ -2613,7 +2613,7 @@ static int > migration_completion_precopy(MigrationState *s, > { > int ret; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > migration_downtime_start(s); > qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); > > @@ -2641,7 +2641,7 @@ static int > migration_completion_precopy(MigrationState *s, > ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, > s->block_inactive); > out_unlock: > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return ret; > } > > @@ -2649,9 +2649,9 @@ static void > migration_completion_postcopy(MigrationState *s) > { > trace_migration_completion_postcopy_end(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_savevm_state_complete_postcopy(s->to_dst_file); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > /* > * Shutdown the postcopy fast path thread. This is only needed when > dest > @@ -2675,14 +2675,14 @@ static void > migration_completion_failed(MigrationState *s, > */ > Error *local_err = NULL; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > bdrv_activate_all(&local_err); > if (local_err) { > error_report_err(local_err); > } else { > s->block_inactive = false; > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > migrate_set_state(&s->state, current_active_state, > @@ -3122,7 +3122,7 @@ static void > migration_iteration_finish(MigrationState *s) > /* If we enabled cpu throttling for auto-converge, turn it off. */ > cpu_throttle_stop(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > switch (s->state) { > case MIGRATION_STATUS_COMPLETED: > migration_calculate_complete(s); > @@ -3153,7 +3153,7 @@ static void > migration_iteration_finish(MigrationState *s) > break; > } > migrate_fd_cleanup_schedule(s); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > static void bg_migration_iteration_finish(MigrationState *s) > @@ -3165,7 +3165,7 @@ static void > bg_migration_iteration_finish(MigrationState *s) > */ > ram_write_tracking_stop(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > switch (s->state) { > case MIGRATION_STATUS_COMPLETED: > migration_calculate_complete(s); > @@ -3184,7 +3184,7 @@ static void > bg_migration_iteration_finish(MigrationState *s) > } > > migrate_fd_cleanup_schedule(s); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > /* > @@ -3306,9 +3306,9 @@ static void *migration_thread(void *opaque) > object_ref(OBJECT(s)); > update_iteration_initial_status(s); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_savevm_state_header(s->to_dst_file); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > /* > * If we opened the return path, we need to make sure dst has it > @@ -3336,9 +3336,9 @@ static void *migration_thread(void *opaque) > qemu_savevm_send_colo_enable(s->to_dst_file); > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_savevm_state_setup(s->to_dst_file); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP, > MIGRATION_STATUS_ACTIVE); > @@ -3449,10 +3449,10 @@ static void *bg_migration_thread(void *opaque) > ram_write_tracking_prepare(); > #endif > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_savevm_state_header(s->to_dst_file); > qemu_savevm_state_setup(s->to_dst_file); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP, > MIGRATION_STATUS_ACTIVE); > @@ -3462,7 +3462,7 @@ static void *bg_migration_thread(void *opaque) > trace_migration_thread_setup_complete(); > migration_downtime_start(s); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > /* > * If VM is currently in suspended state, then, to make a valid > runstate > @@ -3505,7 +3505,7 @@ static void *bg_migration_thread(void *opaque) > s->vm_start_bh = qemu_bh_new(bg_migration_vm_start_bh, s); > qemu_bh_schedule(s->vm_start_bh); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > while (migration_is_active(s)) { > MigIterateState iter_state = bg_migration_iteration_run(s); > @@ -3534,7 +3534,7 @@ fail: > if (early_fail) { > migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE, > MIGRATION_STATUS_FAILED); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > bg_migration_iteration_finish(s); > diff --git a/migration/ram.c b/migration/ram.c > index 8c7886ab79..08dc7e2909 100644 > --- a/migration/ram.c > +++ b/migration/ram.c > @@ -2984,9 +2984,9 @@ static int ram_save_setup(QEMUFile *f, void *opaque) > migration_ops = g_malloc0(sizeof(MigrationOps)); > migration_ops->ram_save_target_page = ram_save_target_page_legacy; > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > ret = multifd_send_sync_main(f); > - qemu_mutex_lock_iothread(); > + bql_lock(); > if (ret < 0) { > return ret; > } > @@ -3221,11 +3221,11 @@ static void ram_state_pending_exact(void *opaque, > uint64_t *must_precopy, > uint64_t remaining_size = rs->migration_dirty_pages * > TARGET_PAGE_SIZE; > > if (!migration_in_postcopy() && remaining_size < s->threshold_size) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > WITH_RCU_READ_LOCK_GUARD() { > migration_bitmap_sync_precopy(rs, false); > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > remaining_size = rs->migration_dirty_pages * TARGET_PAGE_SIZE; > } > > @@ -3453,7 +3453,7 @@ void colo_incoming_start_dirty_log(void) > { > RAMBlock *block = NULL; > /* For memory_global_dirty_log_start below. */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_mutex_lock_ramlist(); > > memory_global_dirty_log_sync(false); > @@ -3467,7 +3467,7 @@ void colo_incoming_start_dirty_log(void) > } > ram_state->migration_dirty_pages = 0; > qemu_mutex_unlock_ramlist(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > /* It is need to hold the global lock to call this helper */ > diff --git a/replay/replay-internal.c b/replay/replay-internal.c > index 77d0c82327..3e08e381cb 100644 > --- a/replay/replay-internal.c > +++ b/replay/replay-internal.c > @@ -216,7 +216,7 @@ void replay_mutex_lock(void) > { > if (replay_mode != REPLAY_MODE_NONE) { > unsigned long id; > - g_assert(!qemu_mutex_iothread_locked()); > + g_assert(!bql_locked()); > g_assert(!replay_mutex_locked()); > qemu_mutex_lock(&lock); > id = mutex_tail++; > diff --git a/semihosting/console.c b/semihosting/console.c > index 5d61e8207e..60102bbab6 100644 > --- a/semihosting/console.c > +++ b/semihosting/console.c > @@ -43,7 +43,7 @@ static SemihostingConsole console; > static int console_can_read(void *opaque) > { > SemihostingConsole *c = opaque; > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > return (int)fifo8_num_free(&c->fifo); > } > > @@ -58,7 +58,7 @@ static void console_wake_up(gpointer data, gpointer > user_data) > static void console_read(void *opaque, const uint8_t *buf, int size) > { > SemihostingConsole *c = opaque; > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > while (size-- && !fifo8_is_full(&c->fifo)) { > fifo8_push(&c->fifo, *buf++); > } > @@ -70,7 +70,7 @@ bool qemu_semihosting_console_ready(void) > { > SemihostingConsole *c = &console; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > return !fifo8_is_empty(&c->fifo); > } > > @@ -78,7 +78,7 @@ void qemu_semihosting_console_block_until_ready(CPUState > *cs) > { > SemihostingConsole *c = &console; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > /* Block if the fifo is completely empty. */ > if (fifo8_is_empty(&c->fifo)) { > diff --git a/stubs/iothread-lock.c b/stubs/iothread-lock.c > index 5b45b7fc8b..d7890e5581 100644 > --- a/stubs/iothread-lock.c > +++ b/stubs/iothread-lock.c > @@ -1,15 +1,15 @@ > #include "qemu/osdep.h" > #include "qemu/main-loop.h" > > -bool qemu_mutex_iothread_locked(void) > +bool bql_locked(void) > { > return false; > } > > -void qemu_mutex_lock_iothread_impl(const char *file, int line) > +void bql_lock_impl(const char *file, int line) > { > } > > -void qemu_mutex_unlock_iothread(void) > +void bql_unlock(void) > { > } > diff --git a/system/cpu-throttle.c b/system/cpu-throttle.c > index d9bb30a223..786a9a5639 100644 > --- a/system/cpu-throttle.c > +++ b/system/cpu-throttle.c > @@ -57,9 +57,9 @@ static void cpu_throttle_thread(CPUState *cpu, > run_on_cpu_data opaque) > qemu_cond_timedwait_iothread(cpu->halt_cond, > sleeptime_ns / SCALE_MS); > } else { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > g_usleep(sleeptime_ns / SCALE_US); > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > sleeptime_ns = endtime_ns - > qemu_clock_get_ns(QEMU_CLOCK_REALTIME); > } > diff --git a/system/cpus.c b/system/cpus.c > index a444a747f0..9b68dc9c7c 100644 > --- a/system/cpus.c > +++ b/system/cpus.c > @@ -65,7 +65,8 @@ > > #endif /* CONFIG_LINUX */ > > -static QemuMutex qemu_global_mutex; > +/* The Big QEMU Lock (BQL) */ > +static QemuMutex bql; > > /* > * The chosen accelerator is supposed to register this. > @@ -389,14 +390,14 @@ void qemu_init_cpu_loop(void) > qemu_init_sigbus(); > qemu_cond_init(&qemu_cpu_cond); > qemu_cond_init(&qemu_pause_cond); > - qemu_mutex_init(&qemu_global_mutex); > + qemu_mutex_init(&bql); > > qemu_thread_get_self(&io_thread); > } > > void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data) > { > - do_run_on_cpu(cpu, func, data, &qemu_global_mutex); > + do_run_on_cpu(cpu, func, data, &bql); > } > > static void qemu_cpu_stop(CPUState *cpu, bool exit) > @@ -428,7 +429,7 @@ void qemu_wait_io_event(CPUState *cpu) > slept = true; > qemu_plugin_vcpu_idle_cb(cpu); > } > - qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); > + qemu_cond_wait(cpu->halt_cond, &bql); > } > if (slept) { > qemu_plugin_vcpu_resume_cb(cpu); > @@ -481,46 +482,46 @@ bool qemu_in_vcpu_thread(void) > return current_cpu && qemu_cpu_is_self(current_cpu); > } > > -QEMU_DEFINE_STATIC_CO_TLS(bool, iothread_locked) > +QEMU_DEFINE_STATIC_CO_TLS(bool, bql_locked) > > -bool qemu_mutex_iothread_locked(void) > +bool bql_locked(void) > { > - return get_iothread_locked(); > + return get_bql_locked(); > } > > bool qemu_in_main_thread(void) > { > - return qemu_mutex_iothread_locked(); > + return bql_locked(); > } > > /* > * The BQL is taken from so many places that it is worth profiling the > * callers directly, instead of funneling them all through a single > function. > */ > -void qemu_mutex_lock_iothread_impl(const char *file, int line) > +void bql_lock_impl(const char *file, int line) > { > - QemuMutexLockFunc bql_lock = qatomic_read(&qemu_bql_mutex_lock_func); > + QemuMutexLockFunc bql_lock_fn = qatomic_read(&bql_mutex_lock_func); > > - g_assert(!qemu_mutex_iothread_locked()); > - bql_lock(&qemu_global_mutex, file, line); > - set_iothread_locked(true); > + g_assert(!bql_locked()); > + bql_lock_fn(&bql, file, line); > + set_bql_locked(true); > } > > -void qemu_mutex_unlock_iothread(void) > +void bql_unlock(void) > { > - g_assert(qemu_mutex_iothread_locked()); > - set_iothread_locked(false); > - qemu_mutex_unlock(&qemu_global_mutex); > + g_assert(bql_locked()); > + set_bql_locked(false); > + qemu_mutex_unlock(&bql); > } > > void qemu_cond_wait_iothread(QemuCond *cond) > { > - qemu_cond_wait(cond, &qemu_global_mutex); > + qemu_cond_wait(cond, &bql); > } > > void qemu_cond_timedwait_iothread(QemuCond *cond, int ms) > { > - qemu_cond_timedwait(cond, &qemu_global_mutex, ms); > + qemu_cond_timedwait(cond, &bql, ms); > } > > /* signal CPU creation */ > @@ -571,15 +572,15 @@ void pause_all_vcpus(void) > replay_mutex_unlock(); > > while (!all_vcpus_paused()) { > - qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex); > + qemu_cond_wait(&qemu_pause_cond, &bql); > CPU_FOREACH(cpu) { > qemu_cpu_kick(cpu); > } > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > replay_mutex_lock(); > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > void cpu_resume(CPUState *cpu) > @@ -608,9 +609,9 @@ void cpu_remove_sync(CPUState *cpu) > cpu->stop = true; > cpu->unplug = true; > qemu_cpu_kick(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > qemu_thread_join(cpu->thread); > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > void cpus_register_accel(const AccelOpsClass *ops) > @@ -649,7 +650,7 @@ void qemu_init_vcpu(CPUState *cpu) > cpus_accel->create_vcpu_thread(cpu); > > while (!cpu->created) { > - qemu_cond_wait(&qemu_cpu_cond, &qemu_global_mutex); > + qemu_cond_wait(&qemu_cpu_cond, &bql); > } > } > > diff --git a/system/dirtylimit.c b/system/dirtylimit.c > index 495c7a7082..b5607eb8c2 100644 > --- a/system/dirtylimit.c > +++ b/system/dirtylimit.c > @@ -148,9 +148,9 @@ void vcpu_dirty_rate_stat_stop(void) > { > qatomic_set(&vcpu_dirty_rate_stat->running, 0); > dirtylimit_state_unlock(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > qemu_thread_join(&vcpu_dirty_rate_stat->thread); > - qemu_mutex_lock_iothread(); > + bql_lock(); > dirtylimit_state_lock(); > } > > diff --git a/system/memory.c b/system/memory.c > index 798b6c0a17..7a9dc43c2d 100644 > --- a/system/memory.c > +++ b/system/memory.c > @@ -1119,7 +1119,7 @@ void memory_region_transaction_commit(void) > AddressSpace *as; > > assert(memory_region_transaction_depth); > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > --memory_region_transaction_depth; > if (!memory_region_transaction_depth) { > diff --git a/system/physmem.c b/system/physmem.c > index a63853a7bc..4937e67bad 100644 > --- a/system/physmem.c > +++ b/system/physmem.c > @@ -2639,8 +2639,8 @@ bool prepare_mmio_access(MemoryRegion *mr) > { > bool release_lock = false; > > - if (!qemu_mutex_iothread_locked()) { > - qemu_mutex_lock_iothread(); > + if (!bql_locked()) { > + bql_lock(); > release_lock = true; > } > if (mr->flush_coalesced_mmio) { > @@ -2721,7 +2721,7 @@ static MemTxResult flatview_write_continue(FlatView > *fv, hwaddr addr, > } > > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > release_lock = false; > } > > @@ -2799,7 +2799,7 @@ MemTxResult flatview_read_continue(FlatView *fv, > hwaddr addr, > } > > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > release_lock = false; > } > > diff --git a/system/runstate.c b/system/runstate.c > index ea9d6c2a32..5833ba0675 100644 > --- a/system/runstate.c > +++ b/system/runstate.c > @@ -810,7 +810,7 @@ void qemu_init_subsystems(void) > > qemu_init_cpu_list(); > qemu_init_cpu_loop(); > - qemu_mutex_lock_iothread(); > + bql_lock(); > > atexit(qemu_run_exit_notifiers); > > diff --git a/system/watchpoint.c b/system/watchpoint.c > index ba5ad13352..b76007ebf6 100644 > --- a/system/watchpoint.c > +++ b/system/watchpoint.c > @@ -155,9 +155,9 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, > vaddr len, > * Now raise the debug interrupt so that it will > * trigger after the current instruction. > */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return; > } > > diff --git a/target/arm/arm-powerctl.c b/target/arm/arm-powerctl.c > index c078849403..8850381565 100644 > --- a/target/arm/arm-powerctl.c > +++ b/target/arm/arm-powerctl.c > @@ -88,7 +88,7 @@ static void arm_set_cpu_on_async_work(CPUState > *target_cpu_state, > g_free(info); > > /* Finally set the power status */ > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > target_cpu->power_state = PSCI_ON; > } > > @@ -99,7 +99,7 @@ int arm_set_cpu_on(uint64_t cpuid, uint64_t entry, > uint64_t context_id, > ARMCPU *target_cpu; > struct CpuOnInfo *info; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > DPRINTF("cpu %" PRId64 " (EL %d, %s) @ 0x%" PRIx64 " with R0 = 0x%" > PRIx64 > "\n", cpuid, target_el, target_aa64 ? "aarch64" : "aarch32", > entry, > @@ -196,7 +196,7 @@ static void > arm_set_cpu_on_and_reset_async_work(CPUState *target_cpu_state, > target_cpu_state->halted = 0; > > /* Finally set the power status */ > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > target_cpu->power_state = PSCI_ON; > } > > @@ -205,7 +205,7 @@ int arm_set_cpu_on_and_reset(uint64_t cpuid) > CPUState *target_cpu_state; > ARMCPU *target_cpu; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > /* Retrieve the cpu we are powering up */ > target_cpu_state = arm_get_cpu_by_id(cpuid); > @@ -247,7 +247,7 @@ static void arm_set_cpu_off_async_work(CPUState > *target_cpu_state, > { > ARMCPU *target_cpu = ARM_CPU(target_cpu_state); > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > target_cpu->power_state = PSCI_OFF; > target_cpu_state->halted = 1; > target_cpu_state->exception_index = EXCP_HLT; > @@ -258,7 +258,7 @@ int arm_set_cpu_off(uint64_t cpuid) > CPUState *target_cpu_state; > ARMCPU *target_cpu; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > DPRINTF("cpu %" PRId64 "\n", cpuid); > > @@ -294,7 +294,7 @@ int arm_reset_cpu(uint64_t cpuid) > CPUState *target_cpu_state; > ARMCPU *target_cpu; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > DPRINTF("cpu %" PRId64 "\n", cpuid); > > diff --git a/target/arm/helper.c b/target/arm/helper.c > index 2746d3fdac..4a978d1102 100644 > --- a/target/arm/helper.c > +++ b/target/arm/helper.c > @@ -5831,7 +5831,7 @@ static void do_hcr_write(CPUARMState *env, uint64_t > value, uint64_t valid_mask) > * VFIQ are masked unless running at EL0 or EL1, and HCR > * can only be written at EL2. > */ > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > arm_cpu_update_virq(cpu); > arm_cpu_update_vfiq(cpu); > arm_cpu_update_vserr(cpu); > @@ -11344,7 +11344,7 @@ void arm_cpu_do_interrupt(CPUState *cs) > * BQL needs to be held for any modification of > * cs->interrupt_request. > */ > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > arm_call_pre_el_change_hook(cpu); > > diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c > index 757e13b0f9..f8dffb815f 100644 > --- a/target/arm/hvf/hvf.c > +++ b/target/arm/hvf/hvf.c > @@ -1718,9 +1718,9 @@ static void hvf_wait_for_ipi(CPUState *cpu, struct > timespec *ts) > * sleeping. > */ > qatomic_set_mb(&cpu->thread_kicked, false); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > pselect(0, 0, 0, 0, ts, &cpu->accel->unblock_ipi_mask); > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > static void hvf_wfi(CPUState *cpu) > @@ -1821,7 +1821,7 @@ int hvf_vcpu_exec(CPUState *cpu) > > flush_cpu_state(cpu); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > assert_hvf_ok(hv_vcpu_run(cpu->accel->fd)); > > /* handle VMEXIT */ > @@ -1830,7 +1830,7 @@ int hvf_vcpu_exec(CPUState *cpu) > uint32_t ec = syn_get_ec(syndrome); > > ret = 0; > - qemu_mutex_lock_iothread(); > + bql_lock(); > switch (exit_reason) { > case HV_EXIT_REASON_EXCEPTION: > /* This is the main one, handle below. */ > diff --git a/target/arm/kvm.c b/target/arm/kvm.c > index 7903e2ddde..dcfe3d48ab 100644 > --- a/target/arm/kvm.c > +++ b/target/arm/kvm.c > @@ -833,7 +833,7 @@ MemTxAttrs kvm_arch_post_run(CPUState *cs, struct > kvm_run *run) > if (run->s.regs.device_irq_level != cpu->device_irq_level) { > switched_level = cpu->device_irq_level ^ > run->s.regs.device_irq_level; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > if (switched_level & KVM_ARM_DEV_EL1_VTIMER) { > qemu_set_irq(cpu->gt_timer_outputs[GTIMER_VIRT], > @@ -862,7 +862,7 @@ MemTxAttrs kvm_arch_post_run(CPUState *cs, struct > kvm_run *run) > > /* We also mark unknown levels as processed to not waste cycles */ > cpu->device_irq_level = run->s.regs.device_irq_level; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > return MEMTXATTRS_UNSPECIFIED; > diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c > index 3c175c93a7..498d77b8cf 100644 > --- a/target/arm/kvm64.c > +++ b/target/arm/kvm64.c > @@ -1233,9 +1233,9 @@ bool kvm_arm_handle_debug(CPUState *cs, struct > kvm_debug_exit_arch *debug_exit) > env->exception.syndrome = debug_exit->hsr; > env->exception.vaddress = debug_exit->far; > env->exception.target_el = 1; > - qemu_mutex_lock_iothread(); > + bql_lock(); > arm_cpu_do_interrupt(cs); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return false; > } > diff --git a/target/arm/ptw.c b/target/arm/ptw.c > index 1762b058ae..0ecd3a36da 100644 > --- a/target/arm/ptw.c > +++ b/target/arm/ptw.c > @@ -772,9 +772,9 @@ static uint64_t arm_casq_ptw(CPUARMState *env, > uint64_t old_val, > #if !TCG_OVERSIZED_GUEST > # error "Unexpected configuration" > #endif > - bool locked = qemu_mutex_iothread_locked(); > + bool locked = bql_locked(); > if (!locked) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > if (ptw->out_be) { > cur_val = ldq_be_p(host); > @@ -788,7 +788,7 @@ static uint64_t arm_casq_ptw(CPUARMState *env, > uint64_t old_val, > } > } > if (!locked) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > > diff --git a/target/arm/tcg/helper-a64.c b/target/arm/tcg/helper-a64.c > index 8ad84623d3..198b975f20 100644 > --- a/target/arm/tcg/helper-a64.c > +++ b/target/arm/tcg/helper-a64.c > @@ -809,9 +809,9 @@ void HELPER(exception_return)(CPUARMState *env, > uint64_t new_pc) > goto illegal_return; > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > arm_call_pre_el_change_hook(env_archcpu(env)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > if (!return_to_aa64) { > env->aarch64 = false; > @@ -876,9 +876,9 @@ void HELPER(exception_return)(CPUARMState *env, > uint64_t new_pc) > */ > aarch64_sve_change_el(env, cur_el, new_el, return_to_aa64); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > arm_call_el_change_hook(env_archcpu(env)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return; > > diff --git a/target/arm/tcg/m_helper.c b/target/arm/tcg/m_helper.c > index a26adb75aa..d1f1e02acc 100644 > --- a/target/arm/tcg/m_helper.c > +++ b/target/arm/tcg/m_helper.c > @@ -373,8 +373,8 @@ void HELPER(v7m_preserve_fp_state)(CPUARMState *env) > bool ts = is_secure && (env->v7m.fpccr[M_REG_S] & > R_V7M_FPCCR_TS_MASK); > bool take_exception; > > - /* Take the iothread lock as we are going to touch the NVIC */ > - qemu_mutex_lock_iothread(); > + /* Take the BQL as we are going to touch the NVIC */ > + bql_lock(); > > /* Check the background context had access to the FPU */ > if (!v7m_cpacr_pass(env, is_secure, is_priv)) { > @@ -428,7 +428,7 @@ void HELPER(v7m_preserve_fp_state)(CPUARMState *env) > take_exception = !stacked_ok && > armv7m_nvic_can_take_pending_exception(env->nvic); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > if (take_exception) { > raise_exception_ra(env, EXCP_LAZYFP, 0, 1, GETPC()); > diff --git a/target/arm/tcg/op_helper.c b/target/arm/tcg/op_helper.c > index ea08936a85..34e706e0fd 100644 > --- a/target/arm/tcg/op_helper.c > +++ b/target/arm/tcg/op_helper.c > @@ -427,9 +427,9 @@ void HELPER(cpsr_write_eret)(CPUARMState *env, > uint32_t val) > { > uint32_t mask; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > arm_call_pre_el_change_hook(env_archcpu(env)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > mask = aarch32_cpsr_valid_mask(env->features, > &env_archcpu(env)->isar); > cpsr_write(env, val, mask, CPSRWriteExceptionReturn); > @@ -442,9 +442,9 @@ void HELPER(cpsr_write_eret)(CPUARMState *env, > uint32_t val) > env->regs[15] &= (env->thumb ? ~1 : ~3); > arm_rebuild_hflags(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > arm_call_el_change_hook(env_archcpu(env)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > /* Access to user mode registers from privileged modes. */ > @@ -803,9 +803,9 @@ void HELPER(set_cp_reg)(CPUARMState *env, const void > *rip, uint32_t value) > const ARMCPRegInfo *ri = rip; > > if (ri->type & ARM_CP_IO) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > ri->writefn(env, ri, value); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } else { > ri->writefn(env, ri, value); > } > @@ -817,9 +817,9 @@ uint32_t HELPER(get_cp_reg)(CPUARMState *env, const > void *rip) > uint32_t res; > > if (ri->type & ARM_CP_IO) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > res = ri->readfn(env, ri); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } else { > res = ri->readfn(env, ri); > } > @@ -832,9 +832,9 @@ void HELPER(set_cp_reg64)(CPUARMState *env, const void > *rip, uint64_t value) > const ARMCPRegInfo *ri = rip; > > if (ri->type & ARM_CP_IO) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > ri->writefn(env, ri, value); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } else { > ri->writefn(env, ri, value); > } > @@ -846,9 +846,9 @@ uint64_t HELPER(get_cp_reg64)(CPUARMState *env, const > void *rip) > uint64_t res; > > if (ri->type & ARM_CP_IO) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > res = ri->readfn(env, ri); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } else { > res = ri->readfn(env, ri); > } > diff --git a/target/arm/tcg/psci.c b/target/arm/tcg/psci.c > index 6c1239bb96..9080a91d9c 100644 > --- a/target/arm/tcg/psci.c > +++ b/target/arm/tcg/psci.c > @@ -107,7 +107,7 @@ void arm_handle_psci_call(ARMCPU *cpu) > } > target_cpu = ARM_CPU(target_cpu_state); > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > ret = target_cpu->power_state; > break; > default: > diff --git a/target/hppa/int_helper.c b/target/hppa/int_helper.c > index 98e9d688f6..efe638b36e 100644 > --- a/target/hppa/int_helper.c > +++ b/target/hppa/int_helper.c > @@ -84,17 +84,17 @@ void hppa_cpu_alarm_timer(void *opaque) > void HELPER(write_eirr)(CPUHPPAState *env, target_ulong val) > { > env->cr[CR_EIRR] &= ~val; > - qemu_mutex_lock_iothread(); > + bql_lock(); > eval_interrupt(env_archcpu(env)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(write_eiem)(CPUHPPAState *env, target_ulong val) > { > env->cr[CR_EIEM] = val; > - qemu_mutex_lock_iothread(); > + bql_lock(); > eval_interrupt(env_archcpu(env)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void hppa_cpu_do_interrupt(CPUState *cs) > diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c > index 20b9ca3ef5..11ffdd4c69 100644 > --- a/target/i386/hvf/hvf.c > +++ b/target/i386/hvf/hvf.c > @@ -429,9 +429,9 @@ int hvf_vcpu_exec(CPUState *cpu) > } > vmx_update_tpr(cpu); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > if (!cpu_is_bsp(X86_CPU(cpu)) && cpu->halted) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > return EXCP_HLT; > } > > @@ -450,7 +450,7 @@ int hvf_vcpu_exec(CPUState *cpu) > rip = rreg(cpu->accel->fd, HV_X86_RIP); > env->eflags = rreg(cpu->accel->fd, HV_X86_RFLAGS); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > update_apic_tpr(cpu); > current_cpu = cpu; > diff --git a/target/i386/kvm/hyperv.c b/target/i386/kvm/hyperv.c > index e3ac978648..6825c89af3 100644 > --- a/target/i386/kvm/hyperv.c > +++ b/target/i386/kvm/hyperv.c > @@ -45,9 +45,9 @@ void hyperv_x86_synic_update(X86CPU *cpu) > > static void async_synic_update(CPUState *cs, run_on_cpu_data data) > { > - qemu_mutex_lock_iothread(); > + bql_lock(); > hyperv_x86_synic_update(X86_CPU(cs)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit) > diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c > index 4ce80555b4..76a66246eb 100644 > --- a/target/i386/kvm/kvm.c > +++ b/target/i386/kvm/kvm.c > @@ -4713,9 +4713,9 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run > *run) > /* Inject NMI */ > if (cpu->interrupt_request & (CPU_INTERRUPT_NMI | CPU_INTERRUPT_SMI)) > { > if (cpu->interrupt_request & CPU_INTERRUPT_NMI) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu->interrupt_request &= ~CPU_INTERRUPT_NMI; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > DPRINTF("injected NMI\n"); > ret = kvm_vcpu_ioctl(cpu, KVM_NMI); > if (ret < 0) { > @@ -4724,9 +4724,9 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run > *run) > } > } > if (cpu->interrupt_request & CPU_INTERRUPT_SMI) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu->interrupt_request &= ~CPU_INTERRUPT_SMI; > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > DPRINTF("injected SMI\n"); > ret = kvm_vcpu_ioctl(cpu, KVM_SMI); > if (ret < 0) { > @@ -4737,7 +4737,7 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run > *run) > } > > if (!kvm_pic_in_kernel()) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > /* Force the VCPU out of its inner loop to process any INIT requests > @@ -4790,7 +4790,7 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run > *run) > DPRINTF("setting tpr\n"); > run->cr8 = cpu_get_apic_tpr(x86_cpu->apic_state); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > > @@ -4838,12 +4838,12 @@ MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct > kvm_run *run) > /* We need to protect the apic state against concurrent accesses from > * different threads in case the userspace irqchip is used. */ > if (!kvm_irqchip_in_kernel()) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > cpu_set_apic_tpr(x86_cpu->apic_state, run->cr8); > cpu_set_apic_base(x86_cpu->apic_state, run->apic_base); > if (!kvm_irqchip_in_kernel()) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > return cpu_get_mem_attrs(env); > } > @@ -5277,17 +5277,17 @@ int kvm_arch_handle_exit(CPUState *cs, struct > kvm_run *run) > switch (run->exit_reason) { > case KVM_EXIT_HLT: > DPRINTF("handle_hlt\n"); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = kvm_handle_halt(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > break; > case KVM_EXIT_SET_TPR: > ret = 0; > break; > case KVM_EXIT_TPR_ACCESS: > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = kvm_handle_tpr_access(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > break; > case KVM_EXIT_FAIL_ENTRY: > code = run->fail_entry.hardware_entry_failure_reason; > @@ -5313,9 +5313,9 @@ int kvm_arch_handle_exit(CPUState *cs, struct > kvm_run *run) > break; > case KVM_EXIT_DEBUG: > DPRINTF("kvm_exit_debug\n"); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = kvm_handle_debug(cpu, &run->debug.arch); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > break; > case KVM_EXIT_HYPERV: > ret = kvm_hv_handle_exit(cpu, &run->hyperv); > diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c > index c0631f9cf4..b0ed2e6aeb 100644 > --- a/target/i386/kvm/xen-emu.c > +++ b/target/i386/kvm/xen-emu.c > @@ -403,7 +403,7 @@ void kvm_xen_maybe_deassert_callback(CPUState *cs) > > /* If the evtchn_upcall_pending flag is cleared, turn the GSI off. */ > if (!vi->evtchn_upcall_pending) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > /* > * Check again now we have the lock, because it may have been > * asserted in the interim. And we don't want to take the lock > @@ -413,7 +413,7 @@ void kvm_xen_maybe_deassert_callback(CPUState *cs) > X86_CPU(cs)->env.xen_callback_asserted = false; > xen_evtchn_set_callback_level(0); > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > > @@ -773,9 +773,9 @@ static bool handle_set_param(struct kvm_xen_exit > *exit, X86CPU *cpu, > > switch (hp.index) { > case HVM_PARAM_CALLBACK_IRQ: > - qemu_mutex_lock_iothread(); > + bql_lock(); > err = xen_evtchn_set_callback_param(hp.value); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > xen_set_long_mode(exit->u.hcall.longmode); > break; > default: > @@ -1408,7 +1408,7 @@ int kvm_xen_soft_reset(void) > CPUState *cpu; > int err; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > trace_kvm_xen_soft_reset(); > > @@ -1481,9 +1481,9 @@ static int schedop_shutdown(CPUState *cs, uint64_t > arg) > break; > > case SHUTDOWN_soft_reset: > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = kvm_xen_soft_reset(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > break; > > default: > diff --git a/target/i386/nvmm/nvmm-accel-ops.c > b/target/i386/nvmm/nvmm-accel-ops.c > index 6c46101ac1..f9d5e9a37a 100644 > --- a/target/i386/nvmm/nvmm-accel-ops.c > +++ b/target/i386/nvmm/nvmm-accel-ops.c > @@ -25,7 +25,7 @@ static void *qemu_nvmm_cpu_thread_fn(void *arg) > > rcu_register_thread(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_thread_get_self(cpu->thread); > cpu->thread_id = qemu_get_thread_id(); > current_cpu = cpu; > @@ -55,7 +55,7 @@ static void *qemu_nvmm_cpu_thread_fn(void *arg) > > nvmm_destroy_vcpu(cpu); > cpu_thread_signal_destroyed(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > rcu_unregister_thread(); > return NULL; > } > diff --git a/target/i386/nvmm/nvmm-all.c b/target/i386/nvmm/nvmm-all.c > index 7d752bc5e0..cfdca91123 100644 > --- a/target/i386/nvmm/nvmm-all.c > +++ b/target/i386/nvmm/nvmm-all.c > @@ -399,7 +399,7 @@ nvmm_vcpu_pre_run(CPUState *cpu) > uint8_t tpr; > int ret; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > tpr = cpu_get_apic_tpr(x86_cpu->apic_state); > if (tpr != qcpu->tpr) { > @@ -462,7 +462,7 @@ nvmm_vcpu_pre_run(CPUState *cpu) > } > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > /* > @@ -485,9 +485,9 @@ nvmm_vcpu_post_run(CPUState *cpu, struct > nvmm_vcpu_exit *exit) > tpr = exit->exitstate.cr8; > if (qcpu->tpr != tpr) { > qcpu->tpr = tpr; > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_set_apic_tpr(x86_cpu->apic_state, qcpu->tpr); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > > @@ -648,7 +648,7 @@ nvmm_handle_halted(struct nvmm_machine *mach, CPUState > *cpu, > CPUX86State *env = cpu_env(cpu); > int ret = 0; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > if (!((cpu->interrupt_request & CPU_INTERRUPT_HARD) && > (env->eflags & IF_MASK)) && > @@ -658,7 +658,7 @@ nvmm_handle_halted(struct nvmm_machine *mach, CPUState > *cpu, > ret = 1; > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return ret; > } > @@ -721,7 +721,7 @@ nvmm_vcpu_loop(CPUState *cpu) > return 0; > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > cpu_exec_start(cpu); > > /* > @@ -806,16 +806,16 @@ nvmm_vcpu_loop(CPUState *cpu) > error_report("NVMM: Unexpected VM exit code 0x%lx [hw=0x%lx]", > exit->reason, exit->u.inv.hwcode); > nvmm_get_registers(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_system_guest_panicked(cpu_get_crash_info(cpu)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > ret = -1; > break; > } > } while (ret == 0); > > cpu_exec_end(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > > qatomic_set(&cpu->exit_request, false); > > diff --git a/target/i386/tcg/sysemu/fpu_helper.c > b/target/i386/tcg/sysemu/fpu_helper.c > index 93506cdd94..e0305ba234 100644 > --- a/target/i386/tcg/sysemu/fpu_helper.c > +++ b/target/i386/tcg/sysemu/fpu_helper.c > @@ -32,9 +32,9 @@ void x86_register_ferr_irq(qemu_irq irq) > void fpu_check_raise_ferr_irq(CPUX86State *env) > { > if (ferr_irq && !(env->hflags2 & HF2_IGNNE_MASK)) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_irq_raise(ferr_irq); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return; > } > } > @@ -49,7 +49,7 @@ void cpu_set_ignne(void) > { > CPUX86State *env = &X86_CPU(first_cpu)->env; > > - assert(qemu_mutex_iothread_locked()); > + assert(bql_locked()); > > env->hflags2 |= HF2_IGNNE_MASK; > /* > diff --git a/target/i386/tcg/sysemu/misc_helper.c > b/target/i386/tcg/sysemu/misc_helper.c > index e1528b7f80..1ddfc9fe09 100644 > --- a/target/i386/tcg/sysemu/misc_helper.c > +++ b/target/i386/tcg/sysemu/misc_helper.c > @@ -118,9 +118,9 @@ void helper_write_crN(CPUX86State *env, int reg, > target_ulong t0) > break; > case 8: > if (!(env->hflags2 & HF2_VINTR_MASK)) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_set_apic_tpr(env_archcpu(env)->apic_state, t0); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > env->int_ctl = (env->int_ctl & ~V_TPR_MASK) | (t0 & V_TPR_MASK); > > diff --git a/target/i386/whpx/whpx-accel-ops.c > b/target/i386/whpx/whpx-accel-ops.c > index 67cad86720..e783a760a7 100644 > --- a/target/i386/whpx/whpx-accel-ops.c > +++ b/target/i386/whpx/whpx-accel-ops.c > @@ -25,7 +25,7 @@ static void *whpx_cpu_thread_fn(void *arg) > > rcu_register_thread(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_thread_get_self(cpu->thread); > cpu->thread_id = qemu_get_thread_id(); > current_cpu = cpu; > @@ -55,7 +55,7 @@ static void *whpx_cpu_thread_fn(void *arg) > > whpx_destroy_vcpu(cpu); > cpu_thread_signal_destroyed(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > rcu_unregister_thread(); > return NULL; > } > diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c > index d29ba916a0..a7262654ac 100644 > --- a/target/i386/whpx/whpx-all.c > +++ b/target/i386/whpx/whpx-all.c > @@ -1324,7 +1324,7 @@ static int whpx_first_vcpu_starting(CPUState *cpu) > struct whpx_state *whpx = &whpx_global; > HRESULT hr; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > if (!QTAILQ_EMPTY(&cpu->breakpoints) || > (whpx->breakpoints.breakpoints && > @@ -1442,7 +1442,7 @@ static int whpx_handle_halt(CPUState *cpu) > CPUX86State *env = cpu_env(cpu); > int ret = 0; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > if (!((cpu->interrupt_request & CPU_INTERRUPT_HARD) && > (env->eflags & IF_MASK)) && > !(cpu->interrupt_request & CPU_INTERRUPT_NMI)) { > @@ -1450,7 +1450,7 @@ static int whpx_handle_halt(CPUState *cpu) > cpu->halted = true; > ret = 1; > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return ret; > } > @@ -1472,7 +1472,7 @@ static void whpx_vcpu_pre_run(CPUState *cpu) > memset(&new_int, 0, sizeof(new_int)); > memset(reg_values, 0, sizeof(reg_values)); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > /* Inject NMI */ > if (!vcpu->interruption_pending && > @@ -1563,7 +1563,7 @@ static void whpx_vcpu_pre_run(CPUState *cpu) > reg_count += 1; > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > vcpu->ready_for_pic_interrupt = false; > > if (reg_count) { > @@ -1590,9 +1590,9 @@ static void whpx_vcpu_post_run(CPUState *cpu) > uint64_t tpr = vcpu->exit_ctx.VpContext.Cr8; > if (vcpu->tpr != tpr) { > vcpu->tpr = tpr; > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_set_apic_tpr(x86_cpu->apic_state, > whpx_cr8_to_apic_tpr(vcpu->tpr)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > vcpu->interruption_pending = > @@ -1652,7 +1652,7 @@ static int whpx_vcpu_run(CPUState *cpu) > WhpxStepMode exclusive_step_mode = WHPX_STEP_NONE; > int ret; > > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > if (whpx->running_cpus++ == 0) { > /* Insert breakpoints into memory, update exception exit bitmap. > */ > @@ -1690,7 +1690,7 @@ static int whpx_vcpu_run(CPUState *cpu) > } > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > if (exclusive_step_mode != WHPX_STEP_NONE) { > start_exclusive(); > @@ -2028,9 +2028,9 @@ static int whpx_vcpu_run(CPUState *cpu) > error_report("WHPX: Unexpected VP exit code %d", > vcpu->exit_ctx.ExitReason); > whpx_get_registers(cpu); > - qemu_mutex_lock_iothread(); > + bql_lock(); > qemu_system_guest_panicked(cpu_get_crash_info(cpu)); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > break; > } > > @@ -2055,7 +2055,7 @@ static int whpx_vcpu_run(CPUState *cpu) > cpu_exec_end(cpu); > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > current_cpu = cpu; > > if (--whpx->running_cpus == 0) { > diff --git a/target/loongarch/csr_helper.c b/target/loongarch/csr_helper.c > index 55341551a5..15f94caefa 100644 > --- a/target/loongarch/csr_helper.c > +++ b/target/loongarch/csr_helper.c > @@ -89,9 +89,9 @@ target_ulong helper_csrwr_ticlr(CPULoongArchState *env, > target_ulong val) > int64_t old_v = 0; > > if (val & 0x1) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > loongarch_cpu_set_irq(cpu, IRQ_TIMER, 0); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > return old_v; > } > diff --git a/target/mips/kvm.c b/target/mips/kvm.c > index e22e24ed97..15d0cf9adb 100644 > --- a/target/mips/kvm.c > +++ b/target/mips/kvm.c > @@ -138,7 +138,7 @@ void kvm_arch_pre_run(CPUState *cs, struct kvm_run > *run) > int r; > struct kvm_mips_interrupt intr; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > if ((cs->interrupt_request & CPU_INTERRUPT_HARD) && > cpu_mips_io_interrupts_pending(cpu)) { > @@ -151,7 +151,7 @@ void kvm_arch_pre_run(CPUState *cs, struct kvm_run > *run) > } > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run) > diff --git a/target/mips/tcg/sysemu/cp0_helper.c > b/target/mips/tcg/sysemu/cp0_helper.c > index d349548743..cc545aed9c 100644 > --- a/target/mips/tcg/sysemu/cp0_helper.c > +++ b/target/mips/tcg/sysemu/cp0_helper.c > @@ -59,9 +59,9 @@ static inline void mips_vpe_wake(MIPSCPU *c) > * because there might be other conditions that state that c should > * be sleeping. > */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_interrupt(CPU(c), CPU_INTERRUPT_WAKE); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > static inline void mips_vpe_sleep(MIPSCPU *cpu) > diff --git a/target/openrisc/sys_helper.c b/target/openrisc/sys_helper.c > index 782a5751b7..77567afba4 100644 > --- a/target/openrisc/sys_helper.c > +++ b/target/openrisc/sys_helper.c > @@ -160,20 +160,20 @@ void HELPER(mtspr)(CPUOpenRISCState *env, > target_ulong spr, target_ulong rb) > break; > case TO_SPR(9, 0): /* PICMR */ > env->picmr = rb; > - qemu_mutex_lock_iothread(); > + bql_lock(); > if (env->picsr & env->picmr) { > cpu_interrupt(cs, CPU_INTERRUPT_HARD); > } else { > cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > break; > case TO_SPR(9, 2): /* PICSR */ > env->picsr &= ~rb; > break; > case TO_SPR(10, 0): /* TTMR */ > { > - qemu_mutex_lock_iothread(); > + bql_lock(); > if ((env->ttmr & TTMR_M) ^ (rb & TTMR_M)) { > switch (rb & TTMR_M) { > case TIMER_NONE: > @@ -198,15 +198,15 @@ void HELPER(mtspr)(CPUOpenRISCState *env, > target_ulong spr, target_ulong rb) > cs->interrupt_request &= ~CPU_INTERRUPT_TIMER; > } > cpu_openrisc_timer_update(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > break; > > case TO_SPR(10, 1): /* TTCR */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_openrisc_count_set(cpu, rb); > cpu_openrisc_timer_update(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > break; > } > #endif > @@ -347,9 +347,9 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, > target_ulong rd, > return env->ttmr; > > case TO_SPR(10, 1): /* TTCR */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_openrisc_count_update(cpu); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return cpu_openrisc_count_get(cpu); > } > #endif > diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c > index a42743a3e0..8a2bfb5aa2 100644 > --- a/target/ppc/excp_helper.c > +++ b/target/ppc/excp_helper.c > @@ -3056,7 +3056,7 @@ void helper_msgsnd(target_ulong rb) > return; > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > CPU_FOREACH(cs) { > PowerPCCPU *cpu = POWERPC_CPU(cs); > CPUPPCState *cenv = &cpu->env; > @@ -3065,7 +3065,7 @@ void helper_msgsnd(target_ulong rb) > ppc_set_irq(cpu, irq, 1); > } > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > /* Server Processor Control */ > @@ -3093,7 +3093,7 @@ static void book3s_msgsnd_common(int pir, int irq) > { > CPUState *cs; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > CPU_FOREACH(cs) { > PowerPCCPU *cpu = POWERPC_CPU(cs); > CPUPPCState *cenv = &cpu->env; > @@ -3103,7 +3103,7 @@ static void book3s_msgsnd_common(int pir, int irq) > ppc_set_irq(cpu, irq, 1); > } > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void helper_book3s_msgsnd(target_ulong rb) > @@ -3157,14 +3157,14 @@ void helper_book3s_msgsndp(CPUPPCState *env, > target_ulong rb) > } > > /* Does iothread need to be locked for walking CPU list? */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > THREAD_SIBLING_FOREACH(cs, ccs) { > PowerPCCPU *ccpu = POWERPC_CPU(ccs); > uint32_t thread_id = ppc_cpu_tir(ccpu); > > if (ttir == thread_id) { > ppc_set_irq(ccpu, PPC_INTERRUPT_DOORBELL, 1); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return; > } > } > diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c > index 9b1abe2fc4..26fa9d0575 100644 > --- a/target/ppc/kvm.c > +++ b/target/ppc/kvm.c > @@ -1656,7 +1656,7 @@ int kvm_arch_handle_exit(CPUState *cs, struct > kvm_run *run) > CPUPPCState *env = &cpu->env; > int ret; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > switch (run->exit_reason) { > case KVM_EXIT_DCR: > @@ -1715,7 +1715,7 @@ int kvm_arch_handle_exit(CPUState *cs, struct > kvm_run *run) > break; > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return ret; > } > > diff --git a/target/ppc/misc_helper.c b/target/ppc/misc_helper.c > index a05bdf78c9..a9d41d2802 100644 > --- a/target/ppc/misc_helper.c > +++ b/target/ppc/misc_helper.c > @@ -238,7 +238,7 @@ target_ulong helper_load_dpdes(CPUPPCState *env) > return dpdes; > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > THREAD_SIBLING_FOREACH(cs, ccs) { > PowerPCCPU *ccpu = POWERPC_CPU(ccs); > CPUPPCState *cenv = &ccpu->env; > @@ -248,7 +248,7 @@ target_ulong helper_load_dpdes(CPUPPCState *env) > dpdes |= (0x1 << thread_id); > } > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return dpdes; > } > @@ -278,14 +278,14 @@ void helper_store_dpdes(CPUPPCState *env, > target_ulong val) > } > > /* Does iothread need to be locked for walking CPU list? */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > THREAD_SIBLING_FOREACH(cs, ccs) { > PowerPCCPU *ccpu = POWERPC_CPU(ccs); > uint32_t thread_id = ppc_cpu_tir(ccpu); > > ppc_set_irq(cpu, PPC_INTERRUPT_DOORBELL, val & (0x1 << > thread_id)); > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif /* defined(TARGET_PPC64) */ > > diff --git a/target/ppc/timebase_helper.c b/target/ppc/timebase_helper.c > index 08a6b47ee0..f618ed2922 100644 > --- a/target/ppc/timebase_helper.c > +++ b/target/ppc/timebase_helper.c > @@ -173,9 +173,9 @@ target_ulong helper_load_dcr(CPUPPCState *env, > target_ulong dcrn) > } else { > int ret; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = ppc_dcr_read(env->dcr_env, (uint32_t)dcrn, &val); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > if (unlikely(ret != 0)) { > qemu_log_mask(LOG_GUEST_ERROR, "DCR read error %d %03x\n", > (uint32_t)dcrn, (uint32_t)dcrn); > @@ -196,9 +196,9 @@ void helper_store_dcr(CPUPPCState *env, target_ulong > dcrn, target_ulong val) > POWERPC_EXCP_INVAL_INVAL, GETPC()); > } else { > int ret; > - qemu_mutex_lock_iothread(); > + bql_lock(); > ret = ppc_dcr_write(env->dcr_env, (uint32_t)dcrn, (uint32_t)val); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > if (unlikely(ret != 0)) { > qemu_log_mask(LOG_GUEST_ERROR, "DCR write error %d %03x\n", > (uint32_t)dcrn, (uint32_t)dcrn); > diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c > index 33ab3551f4..888d6c1a1c 100644 > --- a/target/s390x/kvm/kvm.c > +++ b/target/s390x/kvm/kvm.c > @@ -1923,7 +1923,7 @@ int kvm_arch_handle_exit(CPUState *cs, struct > kvm_run *run) > S390CPU *cpu = S390_CPU(cs); > int ret = 0; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > kvm_cpu_synchronize_state(cs); > > @@ -1947,7 +1947,7 @@ int kvm_arch_handle_exit(CPUState *cs, struct > kvm_run *run) > fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason); > break; > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > if (ret == 0) { > ret = EXCP_INTERRUPT; > diff --git a/target/s390x/tcg/misc_helper.c > b/target/s390x/tcg/misc_helper.c > index 6aa7907438..89b5268fd4 100644 > --- a/target/s390x/tcg/misc_helper.c > +++ b/target/s390x/tcg/misc_helper.c > @@ -101,9 +101,9 @@ uint64_t HELPER(stck)(CPUS390XState *env) > /* SCLP service call */ > uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2) > { > - qemu_mutex_lock_iothread(); > + bql_lock(); > int r = sclp_service_call(env_archcpu(env), r1, r2); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > if (r < 0) { > tcg_s390_program_interrupt(env, -r, GETPC()); > } > @@ -117,9 +117,9 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, > uint32_t r3, uint32_t num) > switch (num) { > case 0x500: > /* KVM hypercall */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > r = s390_virtio_hypercall(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > break; > case 0x44: > /* yield */ > @@ -127,9 +127,9 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, > uint32_t r3, uint32_t num) > break; > case 0x308: > /* ipl */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > handle_diag_308(env, r1, r3, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > r = 0; > break; > case 0x288: > @@ -185,7 +185,7 @@ static void update_ckc_timer(CPUS390XState *env) > > /* stop the timer and remove pending CKC IRQs */ > timer_del(env->tod_timer); > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > env->pending_int &= ~INTERRUPT_EXT_CLOCK_COMPARATOR; > > /* the tod has to exceed the ckc, this can never happen if ckc is all > 1's */ > @@ -207,9 +207,9 @@ void HELPER(sckc)(CPUS390XState *env, uint64_t ckc) > { > env->ckc = ckc; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > update_ckc_timer(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void tcg_s390_tod_updated(CPUState *cs, run_on_cpu_data opaque) > @@ -229,9 +229,9 @@ uint32_t HELPER(sck)(CPUS390XState *env, uint64_t > tod_low) > .low = tod_low, > }; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > tdc->set(td, &tod, &error_abort); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return 0; > } > > @@ -421,9 +421,9 @@ uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t > order_code, uint32_t r1, > int cc; > > /* TODO: needed to inject interrupts - push further down */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > cc = handle_sigp(env, order_code & SIGP_ORDER_MASK, r1, r3); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > return cc; > } > @@ -433,92 +433,92 @@ uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t > order_code, uint32_t r1, > void HELPER(xsch)(CPUS390XState *env, uint64_t r1) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_xsch(cpu, r1, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(csch)(CPUS390XState *env, uint64_t r1) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_csch(cpu, r1, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(hsch)(CPUS390XState *env, uint64_t r1) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_hsch(cpu, r1, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(msch)(CPUS390XState *env, uint64_t r1, uint64_t inst) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_msch(cpu, r1, inst >> 16, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(rchp)(CPUS390XState *env, uint64_t r1) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_rchp(cpu, r1, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(rsch)(CPUS390XState *env, uint64_t r1) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_rsch(cpu, r1, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(sal)(CPUS390XState *env, uint64_t r1) > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_sal(cpu, r1, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(schm)(CPUS390XState *env, uint64_t r1, uint64_t r2, uint64_t > inst) > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_schm(cpu, r1, r2, inst >> 16, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(ssch)(CPUS390XState *env, uint64_t r1, uint64_t inst) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_ssch(cpu, r1, inst >> 16, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(stcrw)(CPUS390XState *env, uint64_t inst) > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_stcrw(cpu, inst >> 16, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(stsch)(CPUS390XState *env, uint64_t r1, uint64_t inst) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_stsch(cpu, r1, inst >> 16, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t addr) > @@ -533,10 +533,10 @@ uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t > addr) > tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra); > } > > - qemu_mutex_lock_iothread(); > + bql_lock(); > io = qemu_s390_flic_dequeue_io(flic, env->cregs[6]); > if (!io) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return 0; > } > > @@ -554,7 +554,7 @@ uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t addr) > if (s390_cpu_virt_mem_write(cpu, addr, 0, &intc, sizeof(intc))) { > /* writing failed, reinject and properly clean up */ > s390_io_interrupt(io->id, io->nr, io->parm, io->word); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > g_free(io); > s390_cpu_virt_mem_handle_exc(cpu, ra); > return 0; > @@ -570,24 +570,24 @@ uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t > addr) > } > > g_free(io); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return 1; > } > > void HELPER(tsch)(CPUS390XState *env, uint64_t r1, uint64_t inst) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_tsch(cpu, r1, inst >> 16, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(chsc)(CPUS390XState *env, uint64_t inst) > { > S390CPU *cpu = env_archcpu(env); > - qemu_mutex_lock_iothread(); > + bql_lock(); > ioinst_handle_chsc(cpu, inst >> 16, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > > @@ -726,27 +726,27 @@ void HELPER(clp)(CPUS390XState *env, uint32_t r2) > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > clp_service_call(cpu, r2, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(pcilg)(CPUS390XState *env, uint32_t r1, uint32_t r2) > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > pcilg_service_call(cpu, r1, r2, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(pcistg)(CPUS390XState *env, uint32_t r1, uint32_t r2) > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > pcistg_service_call(cpu, r1, r2, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(stpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba, > @@ -754,9 +754,9 @@ void HELPER(stpcifc)(CPUS390XState *env, uint32_t r1, > uint64_t fiba, > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > stpcifc_service_call(cpu, r1, fiba, ar, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(sic)(CPUS390XState *env, uint64_t r1, uint64_t r3) > @@ -764,9 +764,9 @@ void HELPER(sic)(CPUS390XState *env, uint64_t r1, > uint64_t r3) > S390CPU *cpu = env_archcpu(env); > int r; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > r = css_do_sic(cpu, (r3 >> 27) & 0x7, r1 & 0xffff); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > /* css_do_sic() may actually return a PGM_xxx value to inject */ > if (r) { > tcg_s390_program_interrupt(env, -r, GETPC()); > @@ -777,9 +777,9 @@ void HELPER(rpcit)(CPUS390XState *env, uint32_t r1, > uint32_t r2) > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > rpcit_service_call(cpu, r1, r2, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(pcistb)(CPUS390XState *env, uint32_t r1, uint32_t r3, > @@ -787,9 +787,9 @@ void HELPER(pcistb)(CPUS390XState *env, uint32_t r1, > uint32_t r3, > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > pcistb_service_call(cpu, r1, r3, gaddr, ar, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(mpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba, > @@ -797,8 +797,8 @@ void HELPER(mpcifc)(CPUS390XState *env, uint32_t r1, > uint64_t fiba, > { > S390CPU *cpu = env_archcpu(env); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > mpcifc_service_call(cpu, r1, fiba, ar, GETPC()); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > diff --git a/target/sparc/int32_helper.c b/target/sparc/int32_helper.c > index 1563613582..49a9149263 100644 > --- a/target/sparc/int32_helper.c > +++ b/target/sparc/int32_helper.c > @@ -70,7 +70,7 @@ void cpu_check_irqs(CPUSPARCState *env) > CPUState *cs; > > /* We should be holding the BQL before we mess with IRQs */ > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > if (env->pil_in && (env->interrupt_index == 0 || > (env->interrupt_index & ~15) == TT_EXTINT)) { > diff --git a/target/sparc/int64_helper.c b/target/sparc/int64_helper.c > index 1b4155f5f3..27df9dba89 100644 > --- a/target/sparc/int64_helper.c > +++ b/target/sparc/int64_helper.c > @@ -69,7 +69,7 @@ void cpu_check_irqs(CPUSPARCState *env) > (env->softint & ~(SOFTINT_TIMER | SOFTINT_STIMER)); > > /* We should be holding the BQL before we mess with IRQs */ > - g_assert(qemu_mutex_iothread_locked()); > + g_assert(bql_locked()); > > /* TT_IVEC has a higher priority (16) than TT_EXTINT (31..17) */ > if (env->ivec_status & 0x20) { > @@ -267,9 +267,9 @@ static bool do_modify_softint(CPUSPARCState *env, > uint32_t value) > env->softint = value; > #if !defined(CONFIG_USER_ONLY) > if (cpu_interrupts_enabled(env)) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_check_irqs(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > return true; > diff --git a/target/sparc/win_helper.c b/target/sparc/win_helper.c > index 16d1c70fe7..b53fc9ce94 100644 > --- a/target/sparc/win_helper.c > +++ b/target/sparc/win_helper.c > @@ -179,9 +179,9 @@ void helper_wrpsr(CPUSPARCState *env, target_ulong > new_psr) > cpu_raise_exception_ra(env, TT_ILL_INSN, GETPC()); > } else { > /* cpu_put_psr may trigger interrupts, hence BQL */ > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_put_psr(env, new_psr); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > > @@ -407,9 +407,9 @@ void helper_wrpstate(CPUSPARCState *env, target_ulong > new_state) > > #if !defined(CONFIG_USER_ONLY) > if (cpu_interrupts_enabled(env)) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_check_irqs(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > } > @@ -422,9 +422,9 @@ void helper_wrpil(CPUSPARCState *env, target_ulong > new_pil) > env->psrpil = new_pil; > > if (cpu_interrupts_enabled(env)) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_check_irqs(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > } > @@ -451,9 +451,9 @@ void helper_done(CPUSPARCState *env) > > #if !defined(CONFIG_USER_ONLY) > if (cpu_interrupts_enabled(env)) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_check_irqs(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > } > @@ -480,9 +480,9 @@ void helper_retry(CPUSPARCState *env) > > #if !defined(CONFIG_USER_ONLY) > if (cpu_interrupts_enabled(env)) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > cpu_check_irqs(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > #endif > } > diff --git a/target/xtensa/exc_helper.c b/target/xtensa/exc_helper.c > index 91354884f7..168419a505 100644 > --- a/target/xtensa/exc_helper.c > +++ b/target/xtensa/exc_helper.c > @@ -105,9 +105,9 @@ void HELPER(waiti)(CPUXtensaState *env, uint32_t pc, > uint32_t intlevel) > env->sregs[PS] = (env->sregs[PS] & ~PS_INTLEVEL) | > (intlevel << PS_INTLEVEL_SHIFT); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > check_interrupts(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > if (env->pending_irq_level) { > cpu_loop_exit(cpu); > @@ -120,9 +120,9 @@ void HELPER(waiti)(CPUXtensaState *env, uint32_t pc, > uint32_t intlevel) > > void HELPER(check_interrupts)(CPUXtensaState *env) > { > - qemu_mutex_lock_iothread(); > + bql_lock(); > check_interrupts(env); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > void HELPER(intset)(CPUXtensaState *env, uint32_t v) > diff --git a/ui/spice-core.c b/ui/spice-core.c > index db21db2c94..b6ee495a8f 100644 > --- a/ui/spice-core.c > +++ b/ui/spice-core.c > @@ -222,7 +222,7 @@ static void channel_event(int event, > SpiceChannelEventInfo *info) > */ > bool need_lock = !qemu_thread_is_self(&me); > if (need_lock) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > if (info->flags & SPICE_CHANNEL_EVENT_FLAG_ADDR_EXT) { > @@ -260,7 +260,7 @@ static void channel_event(int event, > SpiceChannelEventInfo *info) > } > > if (need_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > qapi_free_SpiceServerInfo(server); > diff --git a/util/async.c b/util/async.c > index 8f90ddc304..def720045b 100644 > --- a/util/async.c > +++ b/util/async.c > @@ -741,7 +741,7 @@ AioContext *qemu_get_current_aio_context(void) > if (ctx) { > return ctx; > } > - if (qemu_mutex_iothread_locked()) { > + if (bql_locked()) { > /* Possibly in a vCPU thread. */ > return qemu_get_aio_context(); > } > diff --git a/util/main-loop.c b/util/main-loop.c > index 797b640c41..bfbff4f246 100644 > --- a/util/main-loop.c > +++ b/util/main-loop.c > @@ -302,13 +302,13 @@ static int os_host_main_loop_wait(int64_t timeout) > > glib_pollfds_fill(&timeout); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > replay_mutex_unlock(); > > ret = qemu_poll_ns((GPollFD *)gpollfds->data, gpollfds->len, timeout); > > replay_mutex_lock(); > - qemu_mutex_lock_iothread(); > + bql_lock(); > > glib_pollfds_poll(); > > @@ -517,7 +517,7 @@ static int os_host_main_loop_wait(int64_t timeout) > > poll_timeout_ns = qemu_soonest_timeout(poll_timeout_ns, timeout); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > > replay_mutex_unlock(); > > @@ -525,7 +525,7 @@ static int os_host_main_loop_wait(int64_t timeout) > > replay_mutex_lock(); > > - qemu_mutex_lock_iothread(); > + bql_lock(); > if (g_poll_ret > 0) { > for (i = 0; i < w->num; i++) { > w->revents[i] = poll_fds[n_poll_fds + i].revents; > diff --git a/util/qsp.c b/util/qsp.c > index 2fe3764906..6b783e2e7f 100644 > --- a/util/qsp.c > +++ b/util/qsp.c > @@ -124,7 +124,7 @@ static const char * const qsp_typenames[] = { > [QSP_CONDVAR] = "condvar", > }; > > -QemuMutexLockFunc qemu_bql_mutex_lock_func = qemu_mutex_lock_impl; > +QemuMutexLockFunc bql_mutex_lock_func = qemu_mutex_lock_impl; > QemuMutexLockFunc qemu_mutex_lock_func = qemu_mutex_lock_impl; > QemuMutexTrylockFunc qemu_mutex_trylock_func = qemu_mutex_trylock_impl; > QemuRecMutexLockFunc qemu_rec_mutex_lock_func = qemu_rec_mutex_lock_impl; > @@ -439,7 +439,7 @@ void qsp_enable(void) > { > qatomic_set(&qemu_mutex_lock_func, qsp_mutex_lock); > qatomic_set(&qemu_mutex_trylock_func, qsp_mutex_trylock); > - qatomic_set(&qemu_bql_mutex_lock_func, qsp_bql_mutex_lock); > + qatomic_set(&bql_mutex_lock_func, qsp_bql_mutex_lock); > qatomic_set(&qemu_rec_mutex_lock_func, qsp_rec_mutex_lock); > qatomic_set(&qemu_rec_mutex_trylock_func, qsp_rec_mutex_trylock); > qatomic_set(&qemu_cond_wait_func, qsp_cond_wait); > @@ -450,7 +450,7 @@ void qsp_disable(void) > { > qatomic_set(&qemu_mutex_lock_func, qemu_mutex_lock_impl); > qatomic_set(&qemu_mutex_trylock_func, qemu_mutex_trylock_impl); > - qatomic_set(&qemu_bql_mutex_lock_func, qemu_mutex_lock_impl); > + qatomic_set(&bql_mutex_lock_func, qemu_mutex_lock_impl); > qatomic_set(&qemu_rec_mutex_lock_func, qemu_rec_mutex_lock_impl); > qatomic_set(&qemu_rec_mutex_trylock_func, > qemu_rec_mutex_trylock_impl); > qatomic_set(&qemu_cond_wait_func, qemu_cond_wait_impl); > diff --git a/util/rcu.c b/util/rcu.c > index e587bcc483..bb7f633b5c 100644 > --- a/util/rcu.c > +++ b/util/rcu.c > @@ -283,24 +283,24 @@ static void *call_rcu_thread(void *opaque) > > qatomic_sub(&rcu_call_count, n); > synchronize_rcu(); > - qemu_mutex_lock_iothread(); > + bql_lock(); > while (n > 0) { > node = try_dequeue(); > while (!node) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > qemu_event_reset(&rcu_call_ready_event); > node = try_dequeue(); > if (!node) { > qemu_event_wait(&rcu_call_ready_event); > node = try_dequeue(); > } > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > n--; > node->func(node); > } > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > abort(); > } > @@ -337,13 +337,13 @@ static void drain_rcu_callback(struct rcu_head *node) > void drain_call_rcu(void) > { > struct rcu_drain rcu_drain; > - bool locked = qemu_mutex_iothread_locked(); > + bool locked = bql_locked(); > > memset(&rcu_drain, 0, sizeof(struct rcu_drain)); > qemu_event_init(&rcu_drain.drain_complete_event, false); > > if (locked) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > > > @@ -365,7 +365,7 @@ void drain_call_rcu(void) > qatomic_dec(&in_drain_call_rcu); > > if (locked) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > } > diff --git a/audio/coreaudio.m b/audio/coreaudio.m > index 8cd129a27d..9d2db9883c 100644 > --- a/audio/coreaudio.m > +++ b/audio/coreaudio.m > @@ -547,7 +547,7 @@ static OSStatus handle_voice_change( > { > coreaudioVoiceOut *core = in_client_data; > > - qemu_mutex_lock_iothread(); > + bql_lock(); > > if (core->outputDeviceID) { > fini_out_device(core); > @@ -557,7 +557,7 @@ static OSStatus handle_voice_change( > update_device_playback_state(core); > } > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > return 0; > } > > diff --git a/memory_ldst.c.inc b/memory_ldst.c.inc > index 84b868f294..0e6f3940a9 100644 > --- a/memory_ldst.c.inc > +++ b/memory_ldst.c.inc > @@ -61,7 +61,7 @@ static inline uint32_t glue(address_space_ldl_internal, > SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > return val; > @@ -130,7 +130,7 @@ static inline uint64_t > glue(address_space_ldq_internal, SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > return val; > @@ -186,7 +186,7 @@ uint8_t glue(address_space_ldub, SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > return val; > @@ -234,7 +234,7 @@ static inline uint16_t > glue(address_space_lduw_internal, SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > return val; > @@ -295,7 +295,7 @@ void glue(address_space_stl_notdirty, > SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > } > @@ -339,7 +339,7 @@ static inline void glue(address_space_stl_internal, > SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > } > @@ -391,7 +391,7 @@ void glue(address_space_stb, SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > } > @@ -435,7 +435,7 @@ static inline void glue(address_space_stw_internal, > SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > } > @@ -499,7 +499,7 @@ static void glue(address_space_stq_internal, > SUFFIX)(ARG1_DECL, > *result = r; > } > if (release_lock) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > RCU_READ_UNLOCK(); > } > diff --git a/target/i386/hvf/README.md b/target/i386/hvf/README.md > index 2d33477aca..64a8935237 100644 > --- a/target/i386/hvf/README.md > +++ b/target/i386/hvf/README.md > @@ -4,4 +4,4 @@ These sources (and ../hvf-all.c) are adapted from Veertu > Inc's vdhh (Veertu Desk > > 1. Adapt to our current QEMU's `CPUState` structure and > `address_space_rw` API; many struct members have been moved around > (emulated x86 state, xsave_buf) due to historical differences + QEMU > needing to handle more emulation targets. > 2. Removal of `apic_page` and hyperv-related functionality. > -3. More relaxed use of `qemu_mutex_lock_iothread`. > +3. More relaxed use of `bql_lock`. > diff --git a/ui/cocoa.m b/ui/cocoa.m > index cd069da696..5ebb535070 100644 > --- a/ui/cocoa.m > +++ b/ui/cocoa.m > @@ -117,29 +117,29 @@ static void cocoa_switch(DisplayChangeListener *dcl, > typedef void (^CodeBlock)(void); > typedef bool (^BoolCodeBlock)(void); > > -static void with_iothread_lock(CodeBlock block) > +static void with_bql(CodeBlock block) > { > - bool locked = qemu_mutex_iothread_locked(); > + bool locked = bql_locked(); > if (!locked) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > block(); > if (!locked) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > } > > -static bool bool_with_iothread_lock(BoolCodeBlock block) > +static bool bool_with_bql(BoolCodeBlock block) > { > - bool locked = qemu_mutex_iothread_locked(); > + bool locked = bql_locked(); > bool val; > > if (!locked) { > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > val = block(); > if (!locked) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > } > return val; > } > @@ -605,7 +605,7 @@ - (void) updateUIInfo > return; > } > > - with_iothread_lock(^{ > + with_bql(^{ > [self updateUIInfoLocked]; > }); > } > @@ -790,7 +790,7 @@ - (void) handleMonitorInput:(NSEvent *)event > > - (bool) handleEvent:(NSEvent *)event > { > - return bool_with_iothread_lock(^{ > + return bool_with_bql(^{ > return [self handleEventLocked:event]; > }); > } > @@ -1182,7 +1182,7 @@ - (QEMUScreen) gscreen {return screen;} > */ > - (void) raiseAllKeys > { > - with_iothread_lock(^{ > + with_bql(^{ > qkbd_state_lift_all_keys(kbd); > }); > } > @@ -1282,7 +1282,7 @@ - (void)applicationWillTerminate:(NSNotification > *)aNotification > { > COCOA_DEBUG("QemuCocoaAppController: applicationWillTerminate\n"); > > - with_iothread_lock(^{ > + with_bql(^{ > shutdown_action = SHUTDOWN_ACTION_POWEROFF; > qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI); > }); > @@ -1420,7 +1420,7 @@ - (void)displayConsole:(id)sender > /* Pause the guest */ > - (void)pauseQEMU:(id)sender > { > - with_iothread_lock(^{ > + with_bql(^{ > qmp_stop(NULL); > }); > [sender setEnabled: NO]; > @@ -1431,7 +1431,7 @@ - (void)pauseQEMU:(id)sender > /* Resume running the guest operating system */ > - (void)resumeQEMU:(id) sender > { > - with_iothread_lock(^{ > + with_bql(^{ > qmp_cont(NULL); > }); > [sender setEnabled: NO]; > @@ -1461,7 +1461,7 @@ - (void)removePause > /* Restarts QEMU */ > - (void)restartQEMU:(id)sender > { > - with_iothread_lock(^{ > + with_bql(^{ > qmp_system_reset(NULL); > }); > } > @@ -1469,7 +1469,7 @@ - (void)restartQEMU:(id)sender > /* Powers down QEMU */ > - (void)powerDownQEMU:(id)sender > { > - with_iothread_lock(^{ > + with_bql(^{ > qmp_system_powerdown(NULL); > }); > } > @@ -1488,7 +1488,7 @@ - (void)ejectDeviceMedia:(id)sender > } > > __block Error *err = NULL; > - with_iothread_lock(^{ > + with_bql(^{ > qmp_eject([drive cStringUsingEncoding: NSASCIIStringEncoding], > NULL, false, false, &err); > }); > @@ -1523,7 +1523,7 @@ - (void)changeDeviceMedia:(id)sender > } > > __block Error *err = NULL; > - with_iothread_lock(^{ > + with_bql(^{ > qmp_blockdev_change_medium([drive cStringUsingEncoding: > NSASCIIStringEncoding], > NULL, > @@ -1605,7 +1605,7 @@ - (void)adjustSpeed:(id)sender > // get the throttle percentage > throttle_pct = [sender tag]; > > - with_iothread_lock(^{ > + with_bql(^{ > cpu_throttle_set(throttle_pct); > }); > COCOA_DEBUG("cpu throttling at %d%c\n", > cpu_throttle_get_percentage(), '%'); > @@ -1819,7 +1819,7 @@ - (void)pasteboard:(NSPasteboard *)sender > provideDataForType:(NSPasteboardType)t > return; > } > > - with_iothread_lock(^{ > + with_bql(^{ > QemuClipboardInfo *info = qemu_clipboard_info_ref(cbinfo); > qemu_event_reset(&cbevent); > qemu_clipboard_request(info, QEMU_CLIPBOARD_TYPE_TEXT); > @@ -1827,9 +1827,9 @@ - (void)pasteboard:(NSPasteboard *)sender > provideDataForType:(NSPasteboardType)t > while (info == cbinfo && > info->types[QEMU_CLIPBOARD_TYPE_TEXT].available && > info->types[QEMU_CLIPBOARD_TYPE_TEXT].data == NULL) { > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > qemu_event_wait(&cbevent); > - qemu_mutex_lock_iothread(); > + bql_lock(); > } > > if (info == cbinfo) { > @@ -1927,9 +1927,9 @@ static void > cocoa_clipboard_request(QemuClipboardInfo *info, > int status; > > COCOA_DEBUG("Second thread: calling qemu_default_main()\n"); > - qemu_mutex_lock_iothread(); > + bql_lock(); > status = qemu_default_main(); > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > COCOA_DEBUG("Second thread: qemu_default_main() returned, exiting\n"); > [cbowner release]; > exit(status); > @@ -1941,7 +1941,7 @@ static int cocoa_main(void) > > COCOA_DEBUG("Entered %s()\n", __func__); > > - qemu_mutex_unlock_iothread(); > + bql_unlock(); > qemu_thread_create(&thread, "qemu_main", call_qemu_main, > NULL, QEMU_THREAD_DETACHED); > > -- > 2.43.0 > > Thanks, Acked-by: Hyman Huang <yong.huang@smartx.com> -- Best regards [-- Attachment #2: Type: text/html, Size: 175162 bytes --] ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2023-12-12 15:39 ` [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() Stefan Hajnoczi 2023-12-13 1:34 ` Yong Huang @ 2023-12-13 6:37 ` Akihiko Odaki 2024-01-02 15:33 ` Stefan Hajnoczi 2024-01-02 21:37 ` Bernhard Beschow 2 siblings, 1 reply; 10+ messages in thread From: Akihiko Odaki @ 2023-12-13 6:37 UTC (permalink / raw) To: Stefan Hajnoczi, qemu-devel Cc: Daniel P. Berrangé, Marcel Apfelbaum, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé, David Woodhouse On 2023/12/13 0:39, Stefan Hajnoczi wrote: > The Big QEMU Lock (BQL) has many names and they are confusing. The > actual QemuMutex variable is called qemu_global_mutex but it's commonly > referred to as the BQL in discussions and some code comments. The > locking APIs, however, are called qemu_mutex_lock_iothread() and > qemu_mutex_unlock_iothread(). > > The "iothread" name is historic and comes from when the main thread was > split into into KVM vcpu threads and the "iothread" (now called the main > loop thread). I have contributed to the confusion myself by introducing > a separate --object iothread, a separate concept unrelated to the BQL. > > The "iothread" name is no longer appropriate for the BQL. Rename the > locking APIs to: > - void bql_lock(void) > - void bql_unlock(void) > - bool bql_locked(void) > > There are more APIs with "iothread" in their names. Subsequent patches > will rename them. There are also comments and documentation that will be > updated in later patches. > > Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> > Reviewed-by: Paul Durrant <paul@xen.org> > Acked-by: Fabiano Rosas <farosas@suse.de> > Acked-by: David Woodhouse <dwmw@amazon.co.uk> > Reviewed-by: Cédric Le Goater <clg@kaod.org> > Acked-by: Peter Xu <peterx@redhat.com> > Acked-by: Eric Farman <farman@linux.ibm.com> > Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> > --- > include/block/aio-wait.h | 2 +- > include/qemu/main-loop.h | 40 ++++----- > include/qemu/thread.h | 2 +- > accel/accel-blocker.c | 10 +-- > accel/dummy-cpus.c | 8 +- > accel/hvf/hvf-accel-ops.c | 4 +- > accel/kvm/kvm-accel-ops.c | 4 +- > accel/kvm/kvm-all.c | 22 ++--- > accel/tcg/cpu-exec.c | 26 +++--- > accel/tcg/cputlb.c | 16 ++-- > accel/tcg/tcg-accel-ops-icount.c | 4 +- > accel/tcg/tcg-accel-ops-mttcg.c | 12 +-- > accel/tcg/tcg-accel-ops-rr.c | 14 ++-- > accel/tcg/tcg-accel-ops.c | 2 +- > accel/tcg/translate-all.c | 2 +- > cpu-common.c | 4 +- > dump/dump.c | 4 +- > hw/core/cpu-common.c | 6 +- > hw/i386/intel_iommu.c | 6 +- > hw/i386/kvm/xen_evtchn.c | 16 ++-- > hw/i386/kvm/xen_overlay.c | 2 +- > hw/i386/kvm/xen_xenstore.c | 2 +- > hw/intc/arm_gicv3_cpuif.c | 2 +- > hw/intc/s390_flic.c | 18 ++-- > hw/misc/edu.c | 4 +- > hw/misc/imx6_src.c | 2 +- > hw/misc/imx7_src.c | 2 +- > hw/net/xen_nic.c | 8 +- > hw/ppc/pegasos2.c | 2 +- > hw/ppc/ppc.c | 4 +- > hw/ppc/spapr.c | 2 +- > hw/ppc/spapr_rng.c | 4 +- > hw/ppc/spapr_softmmu.c | 4 +- > hw/remote/mpqemu-link.c | 20 ++--- > hw/remote/vfio-user-obj.c | 2 +- > hw/s390x/s390-skeys.c | 2 +- > migration/block-dirty-bitmap.c | 4 +- > migration/block.c | 16 ++-- > migration/colo.c | 60 +++++++------- > migration/dirtyrate.c | 12 +-- > migration/migration.c | 52 ++++++------ > migration/ram.c | 12 +-- > replay/replay-internal.c | 2 +- > semihosting/console.c | 8 +- > stubs/iothread-lock.c | 6 +- > system/cpu-throttle.c | 4 +- > system/cpus.c | 51 ++++++------ > system/dirtylimit.c | 4 +- > system/memory.c | 2 +- > system/physmem.c | 8 +- > system/runstate.c | 2 +- > system/watchpoint.c | 4 +- > target/arm/arm-powerctl.c | 14 ++-- > target/arm/helper.c | 4 +- > target/arm/hvf/hvf.c | 8 +- > target/arm/kvm.c | 4 +- > target/arm/kvm64.c | 4 +- > target/arm/ptw.c | 6 +- > target/arm/tcg/helper-a64.c | 8 +- > target/arm/tcg/m_helper.c | 6 +- > target/arm/tcg/op_helper.c | 24 +++--- > target/arm/tcg/psci.c | 2 +- > target/hppa/int_helper.c | 8 +- > target/i386/hvf/hvf.c | 6 +- > target/i386/kvm/hyperv.c | 4 +- > target/i386/kvm/kvm.c | 28 +++---- > target/i386/kvm/xen-emu.c | 14 ++-- > target/i386/nvmm/nvmm-accel-ops.c | 4 +- > target/i386/nvmm/nvmm-all.c | 20 ++--- > target/i386/tcg/sysemu/fpu_helper.c | 6 +- > target/i386/tcg/sysemu/misc_helper.c | 4 +- > target/i386/whpx/whpx-accel-ops.c | 4 +- > target/i386/whpx/whpx-all.c | 24 +++--- > target/loongarch/csr_helper.c | 4 +- > target/mips/kvm.c | 4 +- > target/mips/tcg/sysemu/cp0_helper.c | 4 +- > target/openrisc/sys_helper.c | 16 ++-- > target/ppc/excp_helper.c | 12 +-- > target/ppc/kvm.c | 4 +- > target/ppc/misc_helper.c | 8 +- > target/ppc/timebase_helper.c | 8 +- > target/s390x/kvm/kvm.c | 4 +- > target/s390x/tcg/misc_helper.c | 118 +++++++++++++-------------- > target/sparc/int32_helper.c | 2 +- > target/sparc/int64_helper.c | 6 +- > target/sparc/win_helper.c | 20 ++--- > target/xtensa/exc_helper.c | 8 +- > ui/spice-core.c | 4 +- > util/async.c | 2 +- > util/main-loop.c | 8 +- > util/qsp.c | 6 +- > util/rcu.c | 14 ++-- > audio/coreaudio.m | 4 +- > memory_ldst.c.inc | 18 ++-- > target/i386/hvf/README.md | 2 +- > ui/cocoa.m | 50 ++++++------ > 96 files changed, 530 insertions(+), 529 deletions(-) > > diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h > index 5449b6d742..d22ca24329 100644 > --- a/include/block/aio-wait.h > +++ b/include/block/aio-wait.h > @@ -151,7 +151,7 @@ static inline bool in_aio_context_home_thread(AioContext *ctx) > } > > if (ctx == qemu_get_aio_context()) { > - return qemu_mutex_iothread_locked(); > + return bql_locked(); > } else { > return false; > } > diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h > index 68e70e61aa..596a206acd 100644 > --- a/include/qemu/main-loop.h > +++ b/include/qemu/main-loop.h > @@ -248,19 +248,19 @@ GSource *iohandler_get_g_source(void); > AioContext *iohandler_get_aio_context(void); > > /** > - * qemu_mutex_iothread_locked: Return lock status of the main loop mutex. > + * bql_locked: Return lock status of the Big QEMU Lock (BQL) > * > - * The main loop mutex is the coarsest lock in QEMU, and as such it > + * The Big QEMU Lock (BQL) is the coarsest lock in QEMU, and as such it > * must always be taken outside other locks. This function helps > * functions take different paths depending on whether the current > - * thread is running within the main loop mutex. > + * thread is running within the BQL. > * > * This function should never be used in the block layer, because > * unit tests, block layer tools and qemu-storage-daemon do not > * have a BQL. > * Please instead refer to qemu_in_main_thread(). > */ > -bool qemu_mutex_iothread_locked(void); > +bool bql_locked(void); > > /** > * qemu_in_main_thread: return whether it's possible to safely access > @@ -312,58 +312,58 @@ bool qemu_in_main_thread(void); > } while (0) > > /** > - * qemu_mutex_lock_iothread: Lock the main loop mutex. > + * bql_lock: Lock the Big QEMU Lock (BQL). > * > - * This function locks the main loop mutex. The mutex is taken by > + * This function locks the Big QEMU Lock (BQL). The lock is taken by > * main() in vl.c and always taken except while waiting on > - * external events (such as with select). The mutex should be taken > + * external events (such as with select). The lock should be taken > * by threads other than the main loop thread when calling > * qemu_bh_new(), qemu_set_fd_handler() and basically all other > * functions documented in this file. > * > - * NOTE: tools currently are single-threaded and qemu_mutex_lock_iothread > + * NOTE: tools currently are single-threaded and bql_lock > * is a no-op there. > */ > -#define qemu_mutex_lock_iothread() \ > - qemu_mutex_lock_iothread_impl(__FILE__, __LINE__) > -void qemu_mutex_lock_iothread_impl(const char *file, int line); > +#define bql_lock() \ > + bql_lock_impl(__FILE__, __LINE__) This line break is no longer necessary. ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2023-12-13 6:37 ` Akihiko Odaki @ 2024-01-02 15:33 ` Stefan Hajnoczi 0 siblings, 0 replies; 10+ messages in thread From: Stefan Hajnoczi @ 2024-01-02 15:33 UTC (permalink / raw) To: Akihiko Odaki Cc: qemu-devel, Daniel P. Berrangé, Marcel Apfelbaum, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé, David Woodhouse [-- Attachment #1: Type: text/plain, Size: 1424 bytes --] On Wed, Dec 13, 2023 at 03:37:00PM +0900, Akihiko Odaki wrote: > On 2023/12/13 0:39, Stefan Hajnoczi wrote: > > @@ -312,58 +312,58 @@ bool qemu_in_main_thread(void); > > } while (0) > > /** > > - * qemu_mutex_lock_iothread: Lock the main loop mutex. > > + * bql_lock: Lock the Big QEMU Lock (BQL). > > * > > - * This function locks the main loop mutex. The mutex is taken by > > + * This function locks the Big QEMU Lock (BQL). The lock is taken by > > * main() in vl.c and always taken except while waiting on > > - * external events (such as with select). The mutex should be taken > > + * external events (such as with select). The lock should be taken > > * by threads other than the main loop thread when calling > > * qemu_bh_new(), qemu_set_fd_handler() and basically all other > > * functions documented in this file. > > * > > - * NOTE: tools currently are single-threaded and qemu_mutex_lock_iothread > > + * NOTE: tools currently are single-threaded and bql_lock > > * is a no-op there. > > */ > > -#define qemu_mutex_lock_iothread() \ > > - qemu_mutex_lock_iothread_impl(__FILE__, __LINE__) > > -void qemu_mutex_lock_iothread_impl(const char *file, int line); > > +#define bql_lock() \ > > + bql_lock_impl(__FILE__, __LINE__) > > This line break is no longer necessary. Will fix in v3. Stefan [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 488 bytes --] ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2023-12-12 15:39 ` [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() Stefan Hajnoczi 2023-12-13 1:34 ` Yong Huang 2023-12-13 6:37 ` Akihiko Odaki @ 2024-01-02 21:37 ` Bernhard Beschow 2 siblings, 0 replies; 10+ messages in thread From: Bernhard Beschow @ 2024-01-02 21:37 UTC (permalink / raw) To: Stefan Hajnoczi, qemu-devel Cc: Daniel P. Berrangé, Marcel Apfelbaum, Akihiko Odaki, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé, David Woodhouse Am 12. Dezember 2023 15:39:00 UTC schrieb Stefan Hajnoczi <stefanha@redhat.com>: >The Big QEMU Lock (BQL) has many names and they are confusing. The >actual QemuMutex variable is called qemu_global_mutex but it's commonly >referred to as the BQL in discussions and some code comments. The >locking APIs, however, are called qemu_mutex_lock_iothread() and >qemu_mutex_unlock_iothread(). > >The "iothread" name is historic and comes from when the main thread was >split into into KVM vcpu threads and the "iothread" (now called the main Duplicate "into" here. >loop thread). I have contributed to the confusion myself by introducing >a separate --object iothread, a separate concept unrelated to the BQL. > >The "iothread" name is no longer appropriate for the BQL. Rename the >locking APIs to: >- void bql_lock(void) >- void bql_unlock(void) >- bool bql_locked(void) > >There are more APIs with "iothread" in their names. Subsequent patches >will rename them. There are also comments and documentation that will be >updated in later patches. > >Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> >Reviewed-by: Paul Durrant <paul@xen.org> >Acked-by: Fabiano Rosas <farosas@suse.de> >Acked-by: David Woodhouse <dwmw@amazon.co.uk> >Reviewed-by: Cédric Le Goater <clg@kaod.org> >Acked-by: Peter Xu <peterx@redhat.com> >Acked-by: Eric Farman <farman@linux.ibm.com> >Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> ^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH v2 2/5] qemu/main-loop: rename QEMU_IOTHREAD_LOCK_GUARD to BQL_LOCK_GUARD 2023-12-12 15:38 [PATCH v2 0/5] Make Big QEMU Lock naming consistent Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() Stefan Hajnoczi @ 2023-12-12 15:39 ` Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 3/5] qemu/main-loop: rename qemu_cond_wait_iothread() to qemu_cond_wait_bql() Stefan Hajnoczi ` (2 subsequent siblings) 4 siblings, 0 replies; 10+ messages in thread From: Stefan Hajnoczi @ 2023-12-12 15:39 UTC (permalink / raw) To: qemu-devel Cc: Daniel P. Berrangé, Marcel Apfelbaum, Akihiko Odaki, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Stefan Hajnoczi, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé, David Woodhouse The name "iothread" is overloaded. Use the term Big QEMU Lock (BQL) instead, it is already widely used and unambiguous. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paul Durrant <paul@xen.org> Acked-by: David Woodhouse <dwmw@amazon.co.uk> Reviewed-by: Cédric Le Goater <clg@kaod.org> Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> --- include/qemu/main-loop.h | 19 +++++++++---------- hw/i386/kvm/xen_evtchn.c | 14 +++++++------- hw/i386/kvm/xen_gnttab.c | 2 +- hw/mips/mips_int.c | 2 +- hw/ppc/ppc.c | 2 +- target/i386/kvm/xen-emu.c | 2 +- target/ppc/excp_helper.c | 2 +- target/ppc/helper_regs.c | 2 +- target/riscv/cpu_helper.c | 4 ++-- 9 files changed, 24 insertions(+), 25 deletions(-) diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h index 596a206acd..1da0fb186e 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -344,33 +344,32 @@ void bql_lock_impl(const char *file, int line); void bql_unlock(void); /** - * QEMU_IOTHREAD_LOCK_GUARD + * BQL_LOCK_GUARD * * Wrap a block of code in a conditional bql_{lock,unlock}. */ -typedef struct IOThreadLockAuto IOThreadLockAuto; +typedef struct BQLLockAuto BQLLockAuto; -static inline IOThreadLockAuto *qemu_iothread_auto_lock(const char *file, - int line) +static inline BQLLockAuto *bql_auto_lock(const char *file, int line) { if (bql_locked()) { return NULL; } bql_lock_impl(file, line); /* Anything non-NULL causes the cleanup function to be called */ - return (IOThreadLockAuto *)(uintptr_t)1; + return (BQLLockAuto *)(uintptr_t)1; } -static inline void qemu_iothread_auto_unlock(IOThreadLockAuto *l) +static inline void bql_auto_unlock(BQLLockAuto *l) { bql_unlock(); } -G_DEFINE_AUTOPTR_CLEANUP_FUNC(IOThreadLockAuto, qemu_iothread_auto_unlock) +G_DEFINE_AUTOPTR_CLEANUP_FUNC(BQLLockAuto, bql_auto_unlock) -#define QEMU_IOTHREAD_LOCK_GUARD() \ - g_autoptr(IOThreadLockAuto) _iothread_lock_auto __attribute__((unused)) \ - = qemu_iothread_auto_lock(__FILE__, __LINE__) +#define BQL_LOCK_GUARD() \ + g_autoptr(BQLLockAuto) _bql_lock_auto __attribute__((unused)) \ + = bql_auto_lock(__FILE__, __LINE__) /* * qemu_cond_wait_iothread: Wait on condition for the main loop mutex diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c index d7d15cfaf7..bd077eda6d 100644 --- a/hw/i386/kvm/xen_evtchn.c +++ b/hw/i386/kvm/xen_evtchn.c @@ -1127,7 +1127,7 @@ int xen_evtchn_reset_op(struct evtchn_reset *reset) return -ESRCH; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); return xen_evtchn_soft_reset(); } @@ -1145,7 +1145,7 @@ int xen_evtchn_close_op(struct evtchn_close *close) return -EINVAL; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); qemu_mutex_lock(&s->port_lock); ret = close_port(s, close->port, &flush_kvm_routes); @@ -1272,7 +1272,7 @@ int xen_evtchn_bind_pirq_op(struct evtchn_bind_pirq *pirq) return -EINVAL; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); if (s->pirq[pirq->pirq].port) { return -EBUSY; @@ -1824,7 +1824,7 @@ int xen_physdev_map_pirq(struct physdev_map_pirq *map) return -ENOTSUP; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); QEMU_LOCK_GUARD(&s->port_lock); if (map->domid != DOMID_SELF && map->domid != xen_domid) { @@ -1884,7 +1884,7 @@ int xen_physdev_unmap_pirq(struct physdev_unmap_pirq *unmap) return -EINVAL; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); qemu_mutex_lock(&s->port_lock); if (!pirq_inuse(s, pirq)) { @@ -1924,7 +1924,7 @@ int xen_physdev_eoi_pirq(struct physdev_eoi *eoi) return -ENOTSUP; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); QEMU_LOCK_GUARD(&s->port_lock); if (!pirq_inuse(s, pirq)) { @@ -1956,7 +1956,7 @@ int xen_physdev_query_pirq(struct physdev_irq_status_query *query) return -ENOTSUP; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); QEMU_LOCK_GUARD(&s->port_lock); if (!pirq_inuse(s, pirq)) { diff --git a/hw/i386/kvm/xen_gnttab.c b/hw/i386/kvm/xen_gnttab.c index 0a24f53f20..d9477ae927 100644 --- a/hw/i386/kvm/xen_gnttab.c +++ b/hw/i386/kvm/xen_gnttab.c @@ -176,7 +176,7 @@ int xen_gnttab_map_page(uint64_t idx, uint64_t gfn) return -EINVAL; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); QEMU_LOCK_GUARD(&s->gnt_lock); xen_overlay_do_map_page(&s->gnt_aliases[idx], gpa); diff --git a/hw/mips/mips_int.c b/hw/mips/mips_int.c index 6c32e466a3..eef2fd2cd1 100644 --- a/hw/mips/mips_int.c +++ b/hw/mips/mips_int.c @@ -36,7 +36,7 @@ static void cpu_mips_irq_request(void *opaque, int irq, int level) return; } - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); if (level) { env->CP0_Cause |= 1 << (irq + CP0Ca_IP); diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c index b6581c16fc..7387b5b677 100644 --- a/hw/ppc/ppc.c +++ b/hw/ppc/ppc.c @@ -47,7 +47,7 @@ void ppc_set_irq(PowerPCCPU *cpu, int irq, int level) unsigned int old_pending; /* We may already have the BQL if coming from the reset path */ - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); old_pending = env->pending_interrupts; diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index b0ed2e6aeb..fc2c2321ac 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -581,7 +581,7 @@ static int xen_set_shared_info(uint64_t gfn) uint64_t gpa = gfn << TARGET_PAGE_BITS; int i, err; - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); /* * The xen_overlay device tells KVM about it too, since it had to diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index 8a2bfb5aa2..2ec6429e36 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -2222,7 +2222,7 @@ static int ppc_next_unmasked_interrupt(CPUPPCState *env) void ppc_maybe_interrupt(CPUPPCState *env) { CPUState *cs = env_cpu(env); - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); if (ppc_next_unmasked_interrupt(env)) { cpu_interrupt(cs, CPU_INTERRUPT_HARD); diff --git a/target/ppc/helper_regs.c b/target/ppc/helper_regs.c index f380342d4d..e0b2dcd02e 100644 --- a/target/ppc/helper_regs.c +++ b/target/ppc/helper_regs.c @@ -244,7 +244,7 @@ void cpu_interrupt_exittb(CPUState *cs) * unless running with TCG. */ if (tcg_enabled()) { - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); cpu_interrupt(cs, CPU_INTERRUPT_EXITTB); } } diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index e7e23b34f4..99d1275729 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -655,7 +655,7 @@ void riscv_cpu_interrupt(CPURISCVState *env) uint64_t gein, vsgein = 0, vstip = 0, irqf = 0; CPUState *cs = env_cpu(env); - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); if (env->virt_enabled) { gein = get_field(env->hstatus, HSTATUS_VGEIN); @@ -681,7 +681,7 @@ uint64_t riscv_cpu_update_mip(CPURISCVState *env, uint64_t mask, uint64_t value) /* No need to update mip for VSTIP */ mask = ((mask == MIP_VSTIP) && env->vstime_irq) ? 0 : mask; - QEMU_IOTHREAD_LOCK_GUARD(); + BQL_LOCK_GUARD(); env->mip = (env->mip & ~mask) | (value & mask); -- 2.43.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 3/5] qemu/main-loop: rename qemu_cond_wait_iothread() to qemu_cond_wait_bql() 2023-12-12 15:38 [PATCH v2 0/5] Make Big QEMU Lock naming consistent Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 2/5] qemu/main-loop: rename QEMU_IOTHREAD_LOCK_GUARD to BQL_LOCK_GUARD Stefan Hajnoczi @ 2023-12-12 15:39 ` Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 4/5] Replace "iothread lock" with "BQL" in comments Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 5/5] Rename "QEMU global mutex" to "BQL" in comments and docs Stefan Hajnoczi 4 siblings, 0 replies; 10+ messages in thread From: Stefan Hajnoczi @ 2023-12-12 15:39 UTC (permalink / raw) To: qemu-devel Cc: Daniel P. Berrangé, Marcel Apfelbaum, Akihiko Odaki, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Stefan Hajnoczi, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé The name "iothread" is overloaded. Use the term Big QEMU Lock (BQL) instead, it is already widely used and unambiguous. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> --- include/qemu/main-loop.h | 10 +++++----- accel/tcg/tcg-accel-ops-rr.c | 4 ++-- hw/display/virtio-gpu.c | 2 +- hw/ppc/spapr_events.c | 2 +- system/cpu-throttle.c | 2 +- system/cpus.c | 4 ++-- target/i386/nvmm/nvmm-accel-ops.c | 2 +- target/i386/whpx/whpx-accel-ops.c | 2 +- 8 files changed, 14 insertions(+), 14 deletions(-) diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h index 1da0fb186e..662fdca566 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -372,17 +372,17 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(BQLLockAuto, bql_auto_unlock) = bql_auto_lock(__FILE__, __LINE__) /* - * qemu_cond_wait_iothread: Wait on condition for the main loop mutex + * qemu_cond_wait_bql: Wait on condition for the Big QEMU Lock (BQL) * - * This function atomically releases the main loop mutex and causes + * This function atomically releases the Big QEMU Lock (BQL) and causes * the calling thread to block on the condition. */ -void qemu_cond_wait_iothread(QemuCond *cond); +void qemu_cond_wait_bql(QemuCond *cond); /* - * qemu_cond_timedwait_iothread: like the previous, but with timeout + * qemu_cond_timedwait_bql: like the previous, but with timeout */ -void qemu_cond_timedwait_iothread(QemuCond *cond, int ms); +void qemu_cond_timedwait_bql(QemuCond *cond, int ms); /* internal interfaces */ diff --git a/accel/tcg/tcg-accel-ops-rr.c b/accel/tcg/tcg-accel-ops-rr.c index c4ea372a3f..5794e5a9ce 100644 --- a/accel/tcg/tcg-accel-ops-rr.c +++ b/accel/tcg/tcg-accel-ops-rr.c @@ -111,7 +111,7 @@ static void rr_wait_io_event(void) while (all_cpu_threads_idle()) { rr_stop_kick_timer(); - qemu_cond_wait_iothread(first_cpu->halt_cond); + qemu_cond_wait_bql(first_cpu->halt_cond); } rr_start_kick_timer(); @@ -198,7 +198,7 @@ static void *rr_cpu_thread_fn(void *arg) /* wait for initial kick-off after machine start */ while (first_cpu->stopped) { - qemu_cond_wait_iothread(first_cpu->halt_cond); + qemu_cond_wait_bql(first_cpu->halt_cond); /* process any pending work */ CPU_FOREACH(cpu) { diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index b016d3bac8..67c5be1a4e 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -1512,7 +1512,7 @@ void virtio_gpu_reset(VirtIODevice *vdev) g->reset_finished = false; qemu_bh_schedule(g->reset_bh); while (!g->reset_finished) { - qemu_cond_wait_iothread(&g->reset_cond); + qemu_cond_wait_bql(&g->reset_cond); } } else { virtio_gpu_reset_bh(g); diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c index deb4641505..cb0eeee587 100644 --- a/hw/ppc/spapr_events.c +++ b/hw/ppc/spapr_events.c @@ -899,7 +899,7 @@ void spapr_mce_req_event(PowerPCCPU *cpu, bool recovered) } return; } - qemu_cond_wait_iothread(&spapr->fwnmi_machine_check_interlock_cond); + qemu_cond_wait_bql(&spapr->fwnmi_machine_check_interlock_cond); if (spapr->fwnmi_machine_check_addr == -1) { /* * If the machine was reset while waiting for the interlock, diff --git a/system/cpu-throttle.c b/system/cpu-throttle.c index 786a9a5639..c951a6c65e 100644 --- a/system/cpu-throttle.c +++ b/system/cpu-throttle.c @@ -54,7 +54,7 @@ static void cpu_throttle_thread(CPUState *cpu, run_on_cpu_data opaque) endtime_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + sleeptime_ns; while (sleeptime_ns > 0 && !cpu->stop) { if (sleeptime_ns > SCALE_MS) { - qemu_cond_timedwait_iothread(cpu->halt_cond, + qemu_cond_timedwait_bql(cpu->halt_cond, sleeptime_ns / SCALE_MS); } else { bql_unlock(); diff --git a/system/cpus.c b/system/cpus.c index 9b68dc9c7c..c8e2772b5f 100644 --- a/system/cpus.c +++ b/system/cpus.c @@ -514,12 +514,12 @@ void bql_unlock(void) qemu_mutex_unlock(&bql); } -void qemu_cond_wait_iothread(QemuCond *cond) +void qemu_cond_wait_bql(QemuCond *cond) { qemu_cond_wait(cond, &bql); } -void qemu_cond_timedwait_iothread(QemuCond *cond, int ms) +void qemu_cond_timedwait_bql(QemuCond *cond, int ms) { qemu_cond_timedwait(cond, &bql, ms); } diff --git a/target/i386/nvmm/nvmm-accel-ops.c b/target/i386/nvmm/nvmm-accel-ops.c index f9d5e9a37a..6b2bfd9b9c 100644 --- a/target/i386/nvmm/nvmm-accel-ops.c +++ b/target/i386/nvmm/nvmm-accel-ops.c @@ -48,7 +48,7 @@ static void *qemu_nvmm_cpu_thread_fn(void *arg) } } while (cpu_thread_is_idle(cpu)) { - qemu_cond_wait_iothread(cpu->halt_cond); + qemu_cond_wait_bql(cpu->halt_cond); } qemu_wait_io_event_common(cpu); } while (!cpu->unplug || cpu_can_run(cpu)); diff --git a/target/i386/whpx/whpx-accel-ops.c b/target/i386/whpx/whpx-accel-ops.c index e783a760a7..189ae0f140 100644 --- a/target/i386/whpx/whpx-accel-ops.c +++ b/target/i386/whpx/whpx-accel-ops.c @@ -48,7 +48,7 @@ static void *whpx_cpu_thread_fn(void *arg) } } while (cpu_thread_is_idle(cpu)) { - qemu_cond_wait_iothread(cpu->halt_cond); + qemu_cond_wait_bql(cpu->halt_cond); } qemu_wait_io_event_common(cpu); } while (!cpu->unplug || cpu_can_run(cpu)); -- 2.43.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 4/5] Replace "iothread lock" with "BQL" in comments 2023-12-12 15:38 [PATCH v2 0/5] Make Big QEMU Lock naming consistent Stefan Hajnoczi ` (2 preceding siblings ...) 2023-12-12 15:39 ` [PATCH v2 3/5] qemu/main-loop: rename qemu_cond_wait_iothread() to qemu_cond_wait_bql() Stefan Hajnoczi @ 2023-12-12 15:39 ` Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 5/5] Rename "QEMU global mutex" to "BQL" in comments and docs Stefan Hajnoczi 4 siblings, 0 replies; 10+ messages in thread From: Stefan Hajnoczi @ 2023-12-12 15:39 UTC (permalink / raw) To: qemu-devel Cc: Daniel P. Berrangé, Marcel Apfelbaum, Akihiko Odaki, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Stefan Hajnoczi, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé The term "iothread lock" is obsolete. The APIs use Big QEMU Lock (BQL) in their names. Update the code comments to use "BQL" instead of "iothread lock". Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> --- docs/devel/reset.rst | 2 +- hw/display/qxl.h | 2 +- include/exec/cpu-common.h | 2 +- include/exec/memory.h | 4 ++-- include/exec/ramblock.h | 2 +- include/migration/register.h | 8 ++++---- target/arm/internals.h | 4 ++-- accel/tcg/cputlb.c | 4 ++-- accel/tcg/tcg-accel-ops-icount.c | 2 +- hw/remote/mpqemu-link.c | 2 +- migration/block-dirty-bitmap.c | 10 +++++----- migration/block.c | 24 ++++++++++++------------ migration/colo.c | 2 +- migration/migration.c | 2 +- migration/ram.c | 4 ++-- system/physmem.c | 6 +++--- target/arm/helper.c | 2 +- ui/spice-core.c | 2 +- util/rcu.c | 2 +- audio/coreaudio.m | 4 ++-- ui/cocoa.m | 6 +++--- 21 files changed, 48 insertions(+), 48 deletions(-) diff --git a/docs/devel/reset.rst b/docs/devel/reset.rst index 38ed1790f7..d4e79718ba 100644 --- a/docs/devel/reset.rst +++ b/docs/devel/reset.rst @@ -19,7 +19,7 @@ Triggering reset This section documents the APIs which "users" of a resettable object should use to control it. All resettable control functions must be called while holding -the iothread lock. +the BQL. You can apply a reset to an object using ``resettable_assert_reset()``. You need to call ``resettable_release_reset()`` to release the object from reset. To diff --git a/hw/display/qxl.h b/hw/display/qxl.h index fdac14edad..e0a85a5ca4 100644 --- a/hw/display/qxl.h +++ b/hw/display/qxl.h @@ -159,7 +159,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(PCIQXLDevice, PCI_QXL) * * Use with care; by the time this function returns, the returned pointer is * not protected by RCU anymore. If the caller is not within an RCU critical - * section and does not hold the iothread lock, it must have other means of + * section and does not hold the BQL, it must have other means of * protecting the pointer, such as a reference to the region that includes * the incoming ram_addr_t. * diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 41115d8919..fef3138d29 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -92,7 +92,7 @@ RAMBlock *qemu_ram_block_by_name(const char *name); * * By the time this function returns, the returned pointer is not protected * by RCU anymore. If the caller is not within an RCU critical section and - * does not hold the iothread lock, it must have other means of protecting the + * does not hold the BQL, it must have other means of protecting the * pointer, such as a reference to the memory region that owns the RAMBlock. */ RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, diff --git a/include/exec/memory.h b/include/exec/memory.h index 831f7c996d..ad6466b07e 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -1962,7 +1962,7 @@ int memory_region_get_fd(MemoryRegion *mr); * * Use with care; by the time this function returns, the returned pointer is * not protected by RCU anymore. If the caller is not within an RCU critical - * section and does not hold the iothread lock, it must have other means of + * section and does not hold the BQL, it must have other means of * protecting the pointer, such as a reference to the region that includes * the incoming ram_addr_t. * @@ -1979,7 +1979,7 @@ MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset); * * Use with care; by the time this function returns, the returned pointer is * not protected by RCU anymore. If the caller is not within an RCU critical - * section and does not hold the iothread lock, it must have other means of + * section and does not hold the BQL, it must have other means of * protecting the pointer, such as a reference to the region that includes * the incoming ram_addr_t. * diff --git a/include/exec/ramblock.h b/include/exec/ramblock.h index 69c6a53902..3eb79723c6 100644 --- a/include/exec/ramblock.h +++ b/include/exec/ramblock.h @@ -34,7 +34,7 @@ struct RAMBlock { ram_addr_t max_length; void (*resized)(const char*, uint64_t length, void *host); uint32_t flags; - /* Protected by iothread lock. */ + /* Protected by the BQL. */ char idstr[256]; /* RCU-enabled, writes protected by the ramlist lock */ QLIST_ENTRY(RAMBlock) next; diff --git a/include/migration/register.h b/include/migration/register.h index fed1d04a3c..9ab1f79512 100644 --- a/include/migration/register.h +++ b/include/migration/register.h @@ -17,7 +17,7 @@ #include "hw/vmstate-if.h" typedef struct SaveVMHandlers { - /* This runs inside the iothread lock. */ + /* This runs inside the BQL. */ SaveStateHandler *save_state; /* @@ -30,7 +30,7 @@ typedef struct SaveVMHandlers { int (*save_live_complete_postcopy)(QEMUFile *f, void *opaque); int (*save_live_complete_precopy)(QEMUFile *f, void *opaque); - /* This runs both outside and inside the iothread lock. */ + /* This runs both outside and inside the BQL. */ bool (*is_active)(void *opaque); bool (*has_postcopy)(void *opaque); @@ -43,14 +43,14 @@ typedef struct SaveVMHandlers { */ bool (*is_active_iterate)(void *opaque); - /* This runs outside the iothread lock in the migration case, and + /* This runs outside the BQL in the migration case, and * within the lock in the savevm case. The callback had better only * use data that is local to the migration thread or protected * by other locks. */ int (*save_live_iterate)(QEMUFile *f, void *opaque); - /* This runs outside the iothread lock! */ + /* This runs outside the BQL! */ /* Note for save_live_pending: * must_precopy: * - must be migrated in precopy or in stopped state diff --git a/target/arm/internals.h b/target/arm/internals.h index 143d57c0fe..71d6c70bf3 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -940,7 +940,7 @@ static inline const char *aarch32_mode_name(uint32_t psr) * * Update the CPU_INTERRUPT_VIRQ bit in cs->interrupt_request, following * a change to either the input VIRQ line from the GIC or the HCR_EL2.VI bit. - * Must be called with the iothread lock held. + * Must be called with the BQL held. */ void arm_cpu_update_virq(ARMCPU *cpu); @@ -949,7 +949,7 @@ void arm_cpu_update_virq(ARMCPU *cpu); * * Update the CPU_INTERRUPT_VFIQ bit in cs->interrupt_request, following * a change to either the input VFIQ line from the GIC or the HCR_EL2.VF bit. - * Must be called with the iothread lock held. + * Must be called with the BQL held. */ void arm_cpu_update_vfiq(ARMCPU *cpu); diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index 5698a9fd8e..3facfcbb24 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1975,7 +1975,7 @@ static void *atomic_mmu_lookup(CPUState *cpu, vaddr addr, MemOpIdx oi, * @size: number of bytes * @mmu_idx: virtual address context * @ra: return address into tcg generated code, or 0 - * Context: iothread lock held + * Context: BQL held * * Load @size bytes from @addr, which is memory-mapped i/o. * The bytes are concatenated in big-endian order with @ret_be. @@ -2521,7 +2521,7 @@ static Int128 do_ld16_mmu(CPUState *cpu, vaddr addr, * @size: number of bytes * @mmu_idx: virtual address context * @ra: return address into tcg generated code, or 0 - * Context: iothread lock held + * Context: BQL held * * Store @size bytes at @addr, which is memory-mapped i/o. * The bytes to store are extracted in little-endian order from @val_le; diff --git a/accel/tcg/tcg-accel-ops-icount.c b/accel/tcg/tcg-accel-ops-icount.c index 5824d92580..9e1ae66f65 100644 --- a/accel/tcg/tcg-accel-ops-icount.c +++ b/accel/tcg/tcg-accel-ops-icount.c @@ -123,7 +123,7 @@ void icount_prepare_for_run(CPUState *cpu, int64_t cpu_budget) if (cpu->icount_budget == 0) { /* - * We're called without the iothread lock, so must take it while + * We're called without the BQL, so must take it while * we're calling timer handlers. */ bql_lock(); diff --git a/hw/remote/mpqemu-link.c b/hw/remote/mpqemu-link.c index d04ac93621..4394dc4d82 100644 --- a/hw/remote/mpqemu-link.c +++ b/hw/remote/mpqemu-link.c @@ -58,7 +58,7 @@ bool mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, Error **errp) assert(qemu_in_coroutine() || !iothread); /* - * Skip unlocking/locking iothread lock when the IOThread is running + * Skip unlocking/locking BQL when the IOThread is running * in co-routine context. Co-routine context is asserted above * for IOThread case. * Also skip lock handling while in a co-routine in the main context. diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 92e031b6fa..2708abf3d7 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -464,7 +464,7 @@ static void send_bitmap_bits(QEMUFile *f, DBMSaveState *s, g_free(buf); } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static void dirty_bitmap_do_save_cleanup(DBMSaveState *s) { SaveBitmapState *dbms; @@ -479,7 +479,7 @@ static void dirty_bitmap_do_save_cleanup(DBMSaveState *s) } } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static int add_bitmaps_to_list(DBMSaveState *s, BlockDriverState *bs, const char *bs_name, GHashTable *alias_map) { @@ -598,7 +598,7 @@ static int add_bitmaps_to_list(DBMSaveState *s, BlockDriverState *bs, return 0; } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static int init_dirty_bitmap_migration(DBMSaveState *s) { BlockDriverState *bs; @@ -607,7 +607,7 @@ static int init_dirty_bitmap_migration(DBMSaveState *s) BlockBackend *blk; GHashTable *alias_map = NULL; - /* Runs in the migration thread, but holds the iothread lock */ + /* Runs in the migration thread, but holds the BQL */ GLOBAL_STATE_CODE(); GRAPH_RDLOCK_GUARD_MAINLOOP(); @@ -742,7 +742,7 @@ static int dirty_bitmap_save_iterate(QEMUFile *f, void *opaque) return s->bulk_completed; } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static int dirty_bitmap_save_complete(QEMUFile *f, void *opaque) { diff --git a/migration/block.c b/migration/block.c index 4a675b92bc..61d4daf022 100644 --- a/migration/block.c +++ b/migration/block.c @@ -66,7 +66,7 @@ typedef struct BlkMigDevState { /* Protected by block migration lock. */ int64_t completed_sectors; - /* During migration this is protected by iothread lock / AioContext. + /* During migration this is protected by BQL / AioContext. * Allocation and free happen during setup and cleanup respectively. */ BdrvDirtyBitmap *dirty_bitmap; @@ -101,7 +101,7 @@ typedef struct BlkMigState { int prev_progress; int bulk_completed; - /* Lock must be taken _inside_ the iothread lock and any AioContexts. */ + /* Lock must be taken _inside_ the BQL and any AioContexts. */ QemuMutex lock; } BlkMigState; @@ -117,7 +117,7 @@ static void blk_mig_unlock(void) qemu_mutex_unlock(&block_mig_state.lock); } -/* Must run outside of the iothread lock during the bulk phase, +/* Must run outside of the BQL during the bulk phase, * or the VM will stall. */ @@ -334,7 +334,7 @@ static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds) return (bmds->cur_sector >= total_sectors); } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static int set_dirty_tracking(void) { @@ -361,7 +361,7 @@ fail: return ret; } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static void unset_dirty_tracking(void) { @@ -512,7 +512,7 @@ static void blk_mig_reset_dirty_cursor(void) } } -/* Called with iothread lock and AioContext taken. */ +/* Called with the BQL and AioContext taken. */ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds, int is_async) @@ -594,7 +594,7 @@ error: return ret; } -/* Called with iothread lock taken. +/* Called with the BQL taken. * * return value: * 0: too much data for max_downtime @@ -658,7 +658,7 @@ static int flush_blks(QEMUFile *f) return ret; } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static int64_t get_remaining_dirty(void) { @@ -676,7 +676,7 @@ static int64_t get_remaining_dirty(void) -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static void block_migration_cleanup_bmds(void) { BlkMigDevState *bmds; @@ -706,7 +706,7 @@ static void block_migration_cleanup_bmds(void) } } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static void block_migration_cleanup(void *opaque) { BlkMigBlock *blk; @@ -783,7 +783,7 @@ static int block_save_iterate(QEMUFile *f, void *opaque) } ret = 0; } else { - /* Always called with iothread lock taken for + /* Always called with the BQL taken for * simplicity, block_save_complete also calls it. */ bql_lock(); @@ -811,7 +811,7 @@ static int block_save_iterate(QEMUFile *f, void *opaque) return (delta_bytes > 0); } -/* Called with iothread lock taken. */ +/* Called with the BQL taken. */ static int block_save_complete(QEMUFile *f, void *opaque) { diff --git a/migration/colo.c b/migration/colo.c index 2a74efdd77..315e31fe32 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -945,7 +945,7 @@ int coroutine_fn colo_incoming_co(void) qemu_thread_join(&th); bql_lock(); - /* We hold the global iothread lock, so it is safe here */ + /* We hold the global BQL, so it is safe here */ colo_release_ram_cache(); return 0; diff --git a/migration/migration.c b/migration/migration.c index be74c714d6..fb0a1a766f 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -2567,7 +2567,7 @@ fail: /** * migration_maybe_pause: Pause if required to by - * migrate_pause_before_switchover called with the iothread locked + * migrate_pause_before_switchover called with the BQL locked * Returns: 0 on success */ static int migration_maybe_pause(MigrationState *s, diff --git a/migration/ram.c b/migration/ram.c index 08dc7e2909..890f31cf66 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2395,7 +2395,7 @@ static void ram_save_cleanup(void *opaque) /* We don't use dirty log with background snapshots */ if (!migrate_background_snapshot()) { - /* caller have hold iothread lock or is in a bh, so there is + /* caller have hold BQL or is in a bh, so there is * no writing race against the migration bitmap */ if (global_dirty_tracking & GLOBAL_DIRTY_MIGRATION) { @@ -3131,7 +3131,7 @@ out: * * Returns zero to indicate success or negative on error * - * Called with iothread lock + * Called with the BQL * * @f: QEMUFile where to send the data * @opaque: RAMState pointer diff --git a/system/physmem.c b/system/physmem.c index 4937e67bad..cc68a79763 100644 --- a/system/physmem.c +++ b/system/physmem.c @@ -799,7 +799,7 @@ static RAMBlock *qemu_get_ram_block(ram_addr_t addr) abort(); found: - /* It is safe to write mru_block outside the iothread lock. This + /* It is safe to write mru_block outside the BQL. This * is what happens: * * mru_block = xxx @@ -1597,7 +1597,7 @@ int qemu_ram_get_fd(RAMBlock *rb) return rb->fd; } -/* Called with iothread lock held. */ +/* Called with the BQL held. */ void qemu_ram_set_idstr(RAMBlock *new_block, const char *name, DeviceState *dev) { RAMBlock *block; @@ -1625,7 +1625,7 @@ void qemu_ram_set_idstr(RAMBlock *new_block, const char *name, DeviceState *dev) } } -/* Called with iothread lock held. */ +/* Called with the BQL held. */ void qemu_ram_unset_idstr(RAMBlock *block) { /* FIXME: arch_init.c assumes that this is not called throughout diff --git a/target/arm/helper.c b/target/arm/helper.c index 4a978d1102..16ec643337 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -5824,7 +5824,7 @@ static void do_hcr_write(CPUARMState *env, uint64_t value, uint64_t valid_mask) * Updates to VI and VF require us to update the status of * virtual interrupts, which are the logical OR of these bits * and the state of the input lines from the GIC. (This requires - * that we have the iothread lock, which is done by marking the + * that we have the BQL, which is done by marking the * reginfo structs as ARM_CP_IO.) * Note that if a write to HCR pends a VIRQ or VFIQ it is never * possible for it to be taken immediately, because VIRQ and diff --git a/ui/spice-core.c b/ui/spice-core.c index b6ee495a8f..37b277fd09 100644 --- a/ui/spice-core.c +++ b/ui/spice-core.c @@ -217,7 +217,7 @@ static void channel_event(int event, SpiceChannelEventInfo *info) * not do that. It isn't that easy to fix it in spice and even * when it is fixed we still should cover the already released * spice versions. So detect that we've been called from another - * thread and grab the iothread lock if so before calling qemu + * thread and grab the BQL if so before calling qemu * functions. */ bool need_lock = !qemu_thread_is_self(&me); diff --git a/util/rcu.c b/util/rcu.c index bb7f633b5c..fa32c942e4 100644 --- a/util/rcu.c +++ b/util/rcu.c @@ -409,7 +409,7 @@ static void rcu_init_complete(void) qemu_event_init(&rcu_call_ready_event, false); - /* The caller is assumed to have iothread lock, so the call_rcu thread + /* The caller is assumed to have BQL, so the call_rcu thread * must have been quiescent even after forking, just recreate it. */ qemu_thread_create(&thread, "call_rcu", call_rcu_thread, diff --git a/audio/coreaudio.m b/audio/coreaudio.m index 9d2db9883c..ab632b9bbb 100644 --- a/audio/coreaudio.m +++ b/audio/coreaudio.m @@ -299,7 +299,7 @@ static ret_type glue(coreaudio_, name)args_decl \ #undef COREAUDIO_WRAPPER_FUNC /* - * callback to feed audiooutput buffer. called without iothread lock. + * callback to feed audiooutput buffer. called without BQL. * allowed to lock "buf_mutex", but disallowed to have any other locks. */ static OSStatus audioDeviceIOProc( @@ -538,7 +538,7 @@ static void update_device_playback_state(coreaudioVoiceOut *core) } } -/* called without iothread lock. */ +/* called without BQL. */ static OSStatus handle_voice_change( AudioObjectID in_object_id, UInt32 in_number_addresses, diff --git a/ui/cocoa.m b/ui/cocoa.m index 5ebb535070..eb99064bee 100644 --- a/ui/cocoa.m +++ b/ui/cocoa.m @@ -113,7 +113,7 @@ static void cocoa_switch(DisplayChangeListener *dcl, static QemuClipboardInfo *cbinfo; static QemuEvent cbevent; -// Utility functions to run specified code block with iothread lock held +// Utility functions to run specified code block with the BQL held typedef void (^CodeBlock)(void); typedef bool (^BoolCodeBlock)(void); @@ -548,7 +548,7 @@ - (void) setContentDimensions - (void) updateUIInfoLocked { - /* Must be called with the iothread lock, i.e. via updateUIInfo */ + /* Must be called with the BQL, i.e. via updateUIInfo */ NSSize frameSize; QemuUIInfo info; @@ -2075,7 +2075,7 @@ static void cocoa_display_init(DisplayState *ds, DisplayOptions *opts) * Create the menu entries which depend on QEMU state (for consoles * and removable devices). These make calls back into QEMU functions, * which is OK because at this point we know that the second thread - * holds the iothread lock and is synchronously waiting for us to + * holds the BQL and is synchronously waiting for us to * finish. */ add_console_menu_entries(); -- 2.43.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 5/5] Rename "QEMU global mutex" to "BQL" in comments and docs 2023-12-12 15:38 [PATCH v2 0/5] Make Big QEMU Lock naming consistent Stefan Hajnoczi ` (3 preceding siblings ...) 2023-12-12 15:39 ` [PATCH v2 4/5] Replace "iothread lock" with "BQL" in comments Stefan Hajnoczi @ 2023-12-12 15:39 ` Stefan Hajnoczi 4 siblings, 0 replies; 10+ messages in thread From: Stefan Hajnoczi @ 2023-12-12 15:39 UTC (permalink / raw) To: qemu-devel Cc: Daniel P. Berrangé, Marcel Apfelbaum, Akihiko Odaki, Artyom Tarasenko, Paul Durrant, Daniel Henrique Barboza, Cédric Le Goater, Paolo Bonzini, BALATON Zoltan, Jagannathan Raman, Anthony Perard, Nicholas Piggin, David Gibson, Stefan Hajnoczi, Aleksandar Rikalo, Alexander Graf, Hailiang Zhang, Marcelo Tosatti, Jiaxun Yang, Huacai Chen, Harsh Prateek Bora, Ilya Leoshkevich, Peter Xu, Hyman Huang, Fam Zheng, Song Gao, Alistair Francis, Marc-André Lureau, Stefano Stabellini, David Woodhouse, Christian Borntraeger, Palmer Dabbelt, Aurelien Jarno, Leonardo Bras, Jiri Slaby, Eric Farman, Thomas Huth, Richard Henderson, David Hildenbrand, Michael Roth, Elena Ufimtseva, Gerd Hoffmann, Cameron Esfahani, qemu-ppc, John Snow, Mark Cave-Ayland, Weiwei Li, Hanna Reitz, qemu-s390x, qemu-block, Alex Bennée, kvm, Michael S. Tsirkin, Pavel Dovgalyuk, Vladimir Sementsov-Ogievskiy, Andrey Smirnov, Reinoud Zandijk, Kevin Wolf, Bin Meng, Sunil Muthuswamy, Peter Maydell, qemu-riscv, Liu Zhiwei, Stafford Horne, Fabiano Rosas, Juan Quintela, Markus Armbruster, qemu-arm, Jason Wang, Eduardo Habkost, Max Filippov, Jean-Christophe Dubois, Eric Blake, Roman Bolshakov, Halil Pasic, xen-devel, Philippe Mathieu-Daudé The term "QEMU global mutex" is identical to the more widely used Big QEMU Lock ("BQL"). Update the code comments and documentation to use "BQL" instead of "QEMU global mutex". Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> --- docs/devel/multi-thread-tcg.rst | 7 +++---- docs/devel/qapi-code-gen.rst | 2 +- docs/devel/replay.rst | 2 +- docs/devel/multiple-iothreads.txt | 16 ++++++++-------- include/block/blockjob.h | 6 +++--- include/io/task.h | 2 +- include/qemu/coroutine-core.h | 2 +- include/qemu/coroutine.h | 2 +- hw/block/dataplane/virtio-blk.c | 8 ++++---- hw/block/virtio-blk.c | 2 +- hw/scsi/virtio-scsi-dataplane.c | 6 +++--- net/tap.c | 2 +- 12 files changed, 28 insertions(+), 29 deletions(-) diff --git a/docs/devel/multi-thread-tcg.rst b/docs/devel/multi-thread-tcg.rst index c9541a7b20..7302c3bf53 100644 --- a/docs/devel/multi-thread-tcg.rst +++ b/docs/devel/multi-thread-tcg.rst @@ -226,10 +226,9 @@ instruction. This could be a future optimisation. Emulated hardware state ----------------------- -Currently thanks to KVM work any access to IO memory is automatically -protected by the global iothread mutex, also known as the BQL (Big -QEMU Lock). Any IO region that doesn't use global mutex is expected to -do its own locking. +Currently thanks to KVM work any access to IO memory is automatically protected +by the BQL (Big QEMU Lock). Any IO region that doesn't use the BQL is expected +to do its own locking. However IO memory isn't the only way emulated hardware state can be modified. Some architectures have model specific registers that diff --git a/docs/devel/qapi-code-gen.rst b/docs/devel/qapi-code-gen.rst index 7f78183cd4..ea8228518c 100644 --- a/docs/devel/qapi-code-gen.rst +++ b/docs/devel/qapi-code-gen.rst @@ -594,7 +594,7 @@ blocking the guest and other background operations. Coroutine safety can be hard to prove, similar to thread safety. Common pitfalls are: -- The global mutex isn't held across ``qemu_coroutine_yield()``, so +- The BQL isn't held across ``qemu_coroutine_yield()``, so operations that used to assume that they execute atomically may have to be more careful to protect against changes in the global state. diff --git a/docs/devel/replay.rst b/docs/devel/replay.rst index 0244be8b9c..effd856f0c 100644 --- a/docs/devel/replay.rst +++ b/docs/devel/replay.rst @@ -184,7 +184,7 @@ modes. Reading and writing requests are created by CPU thread of QEMU. Later these requests proceed to block layer which creates "bottom halves". Bottom halves consist of callback and its parameters. They are processed when -main loop locks the global mutex. These locks are not synchronized with +main loop locks the BQL. These locks are not synchronized with replaying process because main loop also processes the events that do not affect the virtual machine state (like user interaction with monitor). diff --git a/docs/devel/multiple-iothreads.txt b/docs/devel/multiple-iothreads.txt index a3e949f6b3..828e5527a3 100644 --- a/docs/devel/multiple-iothreads.txt +++ b/docs/devel/multiple-iothreads.txt @@ -5,7 +5,7 @@ the COPYING file in the top-level directory. This document explains the IOThread feature and how to write code that runs -outside the QEMU global mutex. +outside the BQL. The main loop and IOThreads --------------------------- @@ -29,13 +29,13 @@ scalability bottleneck on hosts with many CPUs. Work can be spread across several IOThreads instead of just one main loop. When set up correctly this can improve I/O latency and reduce jitter seen by the guest. -The main loop is also deeply associated with the QEMU global mutex, which is a -scalability bottleneck in itself. vCPU threads and the main loop use the QEMU -global mutex to serialize execution of QEMU code. This mutex is necessary -because a lot of QEMU's code historically was not thread-safe. +The main loop is also deeply associated with the BQL, which is a +scalability bottleneck in itself. vCPU threads and the main loop use the BQL +to serialize execution of QEMU code. This mutex is necessary because a lot of +QEMU's code historically was not thread-safe. The fact that all I/O processing is done in a single main loop and that the -QEMU global mutex is contended by all vCPU threads and the main loop explain +BQL is contended by all vCPU threads and the main loop explain why it is desirable to place work into IOThreads. The experimental virtio-blk data-plane implementation has been benchmarked and @@ -66,7 +66,7 @@ There are several old APIs that use the main loop AioContext: Since they implicitly work on the main loop they cannot be used in code that runs in an IOThread. They might cause a crash or deadlock if called from an -IOThread since the QEMU global mutex is not held. +IOThread since the BQL is not held. Instead, use the AioContext functions directly (see include/block/aio.h): * aio_set_fd_handler() - monitor a file descriptor @@ -105,7 +105,7 @@ used in the block layer and can lead to hangs. There is currently no lock ordering rule if a thread needs to acquire multiple AioContexts simultaneously. Therefore, it is only safe for code holding the -QEMU global mutex to acquire other AioContexts. +BQL to acquire other AioContexts. Side note: the best way to schedule a function call across threads is to call aio_bh_schedule_oneshot(). No acquire/release or locking is needed. diff --git a/include/block/blockjob.h b/include/block/blockjob.h index e594c10d23..7061ab7201 100644 --- a/include/block/blockjob.h +++ b/include/block/blockjob.h @@ -54,7 +54,7 @@ typedef struct BlockJob { /** * Speed that was set with @block_job_set_speed. - * Always modified and read under QEMU global mutex (GLOBAL_STATE_CODE). + * Always modified and read under the BQL (GLOBAL_STATE_CODE). */ int64_t speed; @@ -66,7 +66,7 @@ typedef struct BlockJob { /** * Block other operations when block job is running. - * Always modified and read under QEMU global mutex (GLOBAL_STATE_CODE). + * Always modified and read under the BQL (GLOBAL_STATE_CODE). */ Error *blocker; @@ -89,7 +89,7 @@ typedef struct BlockJob { /** * BlockDriverStates that are involved in this block job. - * Always modified and read under QEMU global mutex (GLOBAL_STATE_CODE). + * Always modified and read under the BQL (GLOBAL_STATE_CODE). */ GSList *nodes; } BlockJob; diff --git a/include/io/task.h b/include/io/task.h index dc7d32ebd0..0b5342ee84 100644 --- a/include/io/task.h +++ b/include/io/task.h @@ -149,7 +149,7 @@ typedef void (*QIOTaskWorker)(QIOTask *task, * lookups) to be easily run non-blocking. Reporting the * results in the main thread context means that the caller * typically does not need to be concerned about thread - * safety wrt the QEMU global mutex. + * safety wrt the BQL. * * For example, the socket_listen() method will block the caller * while DNS lookups take place if given a name, instead of IP diff --git a/include/qemu/coroutine-core.h b/include/qemu/coroutine-core.h index 230bb56517..503bad6e0e 100644 --- a/include/qemu/coroutine-core.h +++ b/include/qemu/coroutine-core.h @@ -22,7 +22,7 @@ * rather than callbacks, for operations that need to give up control while * waiting for events to complete. * - * These functions are re-entrant and may be used outside the global mutex. + * These functions are re-entrant and may be used outside the BQL. * * Functions that execute in coroutine context cannot be called * directly from normal functions. Use @coroutine_fn to mark such diff --git a/include/qemu/coroutine.h b/include/qemu/coroutine.h index a65be6697f..e6aff45301 100644 --- a/include/qemu/coroutine.h +++ b/include/qemu/coroutine.h @@ -26,7 +26,7 @@ * rather than callbacks, for operations that need to give up control while * waiting for events to complete. * - * These functions are re-entrant and may be used outside the global mutex. + * These functions are re-entrant and may be used outside the BQL. * * Functions that execute in coroutine context cannot be called * directly from normal functions. Use @coroutine_fn to mark such diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c index f83bb0f116..eafc573407 100644 --- a/hw/block/dataplane/virtio-blk.c +++ b/hw/block/dataplane/virtio-blk.c @@ -47,7 +47,7 @@ void virtio_blk_data_plane_notify(VirtIOBlockDataPlane *s, VirtQueue *vq) virtio_notify_irqfd(s->vdev, vq); } -/* Context: QEMU global mutex held */ +/* Context: BQL held */ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *conf, VirtIOBlockDataPlane **dataplane, Error **errp) @@ -100,7 +100,7 @@ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *conf, return true; } -/* Context: QEMU global mutex held */ +/* Context: BQL held */ void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s) { VirtIOBlock *vblk; @@ -117,7 +117,7 @@ void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s) g_free(s); } -/* Context: QEMU global mutex held */ +/* Context: BQL held */ int virtio_blk_data_plane_start(VirtIODevice *vdev) { VirtIOBlock *vblk = VIRTIO_BLK(vdev); @@ -261,7 +261,7 @@ static void virtio_blk_data_plane_stop_bh(void *opaque) } } -/* Context: QEMU global mutex held */ +/* Context: BQL held */ void virtio_blk_data_plane_stop(VirtIODevice *vdev) { VirtIOBlock *vblk = VIRTIO_BLK(vdev); diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index a1f8e15522..2a5f6544cc 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -1500,7 +1500,7 @@ static void virtio_blk_resize(void *opaque) VirtIODevice *vdev = VIRTIO_DEVICE(opaque); /* - * virtio_notify_config() needs to acquire the global mutex, + * virtio_notify_config() needs to acquire the BQL, * so it can't be called from an iothread. Instead, schedule * it to be run in the main context BH. */ diff --git a/hw/scsi/virtio-scsi-dataplane.c b/hw/scsi/virtio-scsi-dataplane.c index 1e684beebe..56ecc5b12e 100644 --- a/hw/scsi/virtio-scsi-dataplane.c +++ b/hw/scsi/virtio-scsi-dataplane.c @@ -20,7 +20,7 @@ #include "scsi/constants.h" #include "hw/virtio/virtio-bus.h" -/* Context: QEMU global mutex held */ +/* Context: BQL held */ void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp) { VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); @@ -93,7 +93,7 @@ static void virtio_scsi_dataplane_stop_bh(void *opaque) } } -/* Context: QEMU global mutex held */ +/* Context: BQL held */ int virtio_scsi_dataplane_start(VirtIODevice *vdev) { int i; @@ -191,7 +191,7 @@ fail_guest_notifiers: return -ENOSYS; } -/* Context: QEMU global mutex held */ +/* Context: BQL held */ void virtio_scsi_dataplane_stop(VirtIODevice *vdev) { BusState *qbus = qdev_get_parent_bus(DEVICE(vdev)); diff --git a/net/tap.c b/net/tap.c index c23d0323c2..c698b70475 100644 --- a/net/tap.c +++ b/net/tap.c @@ -219,7 +219,7 @@ static void tap_send(void *opaque) /* * When the host keeps receiving more packets while tap_send() is - * running we can hog the QEMU global mutex. Limit the number of + * running we can hog the BQL. Limit the number of * packets that are processed per tap_send() callback to prevent * stalling the guest. */ -- 2.43.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
end of thread, other threads:[~2024-01-02 21:38 UTC | newest] Thread overview: 10+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2023-12-12 15:38 [PATCH v2 0/5] Make Big QEMU Lock naming consistent Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 1/5] system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() Stefan Hajnoczi 2023-12-13 1:34 ` Yong Huang 2023-12-13 6:37 ` Akihiko Odaki 2024-01-02 15:33 ` Stefan Hajnoczi 2024-01-02 21:37 ` Bernhard Beschow 2023-12-12 15:39 ` [PATCH v2 2/5] qemu/main-loop: rename QEMU_IOTHREAD_LOCK_GUARD to BQL_LOCK_GUARD Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 3/5] qemu/main-loop: rename qemu_cond_wait_iothread() to qemu_cond_wait_bql() Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 4/5] Replace "iothread lock" with "BQL" in comments Stefan Hajnoczi 2023-12-12 15:39 ` [PATCH v2 5/5] Rename "QEMU global mutex" to "BQL" in comments and docs Stefan Hajnoczi
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