* [PATCH qom-cpu v2 4/7] cpus: Pass CPUState to qemu_cpu_is_self() [not found] <1350005203-15405-1-git-send-email-afaerber@suse.de> @ 2012-10-12 1:26 ` Andreas Färber 2012-10-16 0:49 ` [Qemu-devel] " Igor Mammedov 0 siblings, 1 reply; 3+ messages in thread From: Andreas Färber @ 2012-10-12 1:26 UTC (permalink / raw) To: qemu-devel Cc: Andreas Färber, Avi Kivity, Marcelo Tosatti, open list:Overall Change return type to bool, move to include/qemu/cpu.h and add documentation. Signed-off-by: Andreas Färber <afaerber@suse.de> --- cpus.c | 10 ++++------ exec.c | 3 ++- hw/apic.c | 6 ++++-- include/qemu/cpu.h | 10 ++++++++++ kvm-all.c | 4 +++- qemu-common.h | 1 - target-i386/kvm.c | 6 ++++-- 7 Dateien geändert, 27 Zeilen hinzugefügt(+), 13 Zeilen entfernt(-) diff --git a/cpus.c b/cpus.c index 750a76f..849ea8a 100644 --- a/cpus.c +++ b/cpus.c @@ -638,9 +638,10 @@ void qemu_init_cpu_loop(void) void run_on_cpu(CPUArchState *env, void (*func)(void *data), void *data) { + CPUState *cpu = ENV_GET_CPU(env); struct qemu_work_item wi; - if (qemu_cpu_is_self(env)) { + if (qemu_cpu_is_self(cpu)) { func(data); return; } @@ -855,7 +856,7 @@ static void qemu_cpu_kick_thread(CPUArchState *env) exit(1); } #else /* _WIN32 */ - if (!qemu_cpu_is_self(env)) { + if (!qemu_cpu_is_self(cpu)) { SuspendThread(cpu->hThread); cpu_signal(0); ResumeThread(cpu->hThread); @@ -890,11 +891,8 @@ void qemu_cpu_kick_self(void) #endif } -int qemu_cpu_is_self(void *_env) +bool qemu_cpu_is_self(CPUState *cpu) { - CPUArchState *env = _env; - CPUState *cpu = ENV_GET_CPU(env); - return qemu_thread_is_self(cpu->thread); } diff --git a/exec.c b/exec.c index 7899042..e21be32 100644 --- a/exec.c +++ b/exec.c @@ -1685,6 +1685,7 @@ static void cpu_unlink_tb(CPUArchState *env) /* mask must never be zero, except for A20 change call */ static void tcg_handle_interrupt(CPUArchState *env, int mask) { + CPUState *cpu = ENV_GET_CPU(env); int old_mask; old_mask = env->interrupt_request; @@ -1694,7 +1695,7 @@ static void tcg_handle_interrupt(CPUArchState *env, int mask) * If called from iothread context, wake the target cpu in * case its halted. */ - if (!qemu_cpu_is_self(env)) { + if (!qemu_cpu_is_self(cpu)) { qemu_cpu_kick(env); return; } diff --git a/hw/apic.c b/hw/apic.c index ccf2819..1b4cd2f 100644 --- a/hw/apic.c +++ b/hw/apic.c @@ -107,7 +107,7 @@ static void apic_sync_vapic(APICCommonState *s, int sync_type) length = offsetof(VAPICState, enabled) - offsetof(VAPICState, isr); if (sync_type & SYNC_TO_VAPIC) { - assert(qemu_cpu_is_self(&s->cpu->env)); + assert(qemu_cpu_is_self(CPU(s->cpu))); vapic_state.tpr = s->tpr; vapic_state.enabled = 1; @@ -363,10 +363,12 @@ static int apic_irq_pending(APICCommonState *s) /* signal the CPU if an irq is pending */ static void apic_update_irq(APICCommonState *s) { + CPUState *cpu = CPU(s->cpu); + if (!(s->spurious_vec & APIC_SV_ENABLE)) { return; } - if (!qemu_cpu_is_self(&s->cpu->env)) { + if (!qemu_cpu_is_self(cpu)) { cpu_interrupt(&s->cpu->env, CPU_INTERRUPT_POLL); } else if (apic_irq_pending(s) > 0) { cpu_interrupt(&s->cpu->env, CPU_INTERRUPT_HARD); diff --git a/include/qemu/cpu.h b/include/qemu/cpu.h index ad706a6..7be983d 100644 --- a/include/qemu/cpu.h +++ b/include/qemu/cpu.h @@ -78,5 +78,15 @@ struct CPUState { */ void cpu_reset(CPUState *cpu); +/** + * qemu_cpu_is_self: + * @cpu: The vCPU to check against. + * + * Checks whether the caller is executing on the vCPU thread. + * + * Returns: %true if called from @cpu's thread, %false otherwise. + */ +bool qemu_cpu_is_self(CPUState *cpu); + #endif diff --git a/kvm-all.c b/kvm-all.c index 92a7137..db01aeb 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -854,9 +854,11 @@ static MemoryListener kvm_memory_listener = { static void kvm_handle_interrupt(CPUArchState *env, int mask) { + CPUState *cpu = ENV_GET_CPU(env); + env->interrupt_request |= mask; - if (!qemu_cpu_is_self(env)) { + if (!qemu_cpu_is_self(cpu)) { qemu_cpu_kick(env); } } diff --git a/qemu-common.h b/qemu-common.h index b54612b..2094742 100644 --- a/qemu-common.h +++ b/qemu-common.h @@ -326,7 +326,6 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id); /* Unblock cpu */ void qemu_cpu_kick(void *env); void qemu_cpu_kick_self(void); -int qemu_cpu_is_self(void *env); /* work queue */ struct qemu_work_item { diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 5b18383..cf3d2f1 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -1552,9 +1552,10 @@ static int kvm_get_debugregs(CPUX86State *env) int kvm_arch_put_registers(CPUX86State *env, int level) { + CPUState *cpu = ENV_GET_CPU(env); int ret; - assert(cpu_is_stopped(env) || qemu_cpu_is_self(env)); + assert(cpu_is_stopped(env) || qemu_cpu_is_self(cpu)); ret = kvm_getput_regs(env, 1); if (ret < 0) { @@ -1609,9 +1610,10 @@ int kvm_arch_put_registers(CPUX86State *env, int level) int kvm_arch_get_registers(CPUX86State *env) { + CPUState *cpu = ENV_GET_CPU(env); int ret; - assert(cpu_is_stopped(env) || qemu_cpu_is_self(env)); + assert(cpu_is_stopped(env) || qemu_cpu_is_self(cpu)); ret = kvm_getput_regs(env, 0); if (ret < 0) { -- 1.7.10.4 ^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH qom-cpu v2 4/7] cpus: Pass CPUState to qemu_cpu_is_self() 2012-10-12 1:26 ` [PATCH qom-cpu v2 4/7] cpus: Pass CPUState to qemu_cpu_is_self() Andreas Färber @ 2012-10-16 0:49 ` Igor Mammedov 2012-10-30 20:08 ` Andreas Färber 0 siblings, 1 reply; 3+ messages in thread From: Igor Mammedov @ 2012-10-16 0:49 UTC (permalink / raw) To: Andreas Färber Cc: qemu-devel, Marcelo Tosatti, open list:Overall, Avi Kivity On Fri, 12 Oct 2012 03:26:40 +0200 Andreas Färber <afaerber@suse.de> wrote: > Change return type to bool, move to include/qemu/cpu.h and > add documentation. > > Signed-off-by: Andreas Färber <afaerber@suse.de> > --- > cpus.c | 10 ++++------ > exec.c | 3 ++- > hw/apic.c | 6 ++++-- > include/qemu/cpu.h | 10 ++++++++++ > kvm-all.c | 4 +++- > qemu-common.h | 1 - > target-i386/kvm.c | 6 ++++-- > 7 Dateien geändert, 27 Zeilen hinzugefügt(+), 13 Zeilen entfernt(-) > > diff --git a/cpus.c b/cpus.c > index 750a76f..849ea8a 100644 > --- a/cpus.c > +++ b/cpus.c > @@ -638,9 +638,10 @@ void qemu_init_cpu_loop(void) > > void run_on_cpu(CPUArchState *env, void (*func)(void *data), void *data) > { > + CPUState *cpu = ENV_GET_CPU(env); > struct qemu_work_item wi; > > - if (qemu_cpu_is_self(env)) { > + if (qemu_cpu_is_self(cpu)) { > func(data); > return; > } > @@ -855,7 +856,7 @@ static void qemu_cpu_kick_thread(CPUArchState *env) > exit(1); > } > #else /* _WIN32 */ > - if (!qemu_cpu_is_self(env)) { > + if (!qemu_cpu_is_self(cpu)) { > SuspendThread(cpu->hThread); > cpu_signal(0); > ResumeThread(cpu->hThread); > @@ -890,11 +891,8 @@ void qemu_cpu_kick_self(void) > #endif > } > > -int qemu_cpu_is_self(void *_env) > +bool qemu_cpu_is_self(CPUState *cpu) > { > - CPUArchState *env = _env; > - CPUState *cpu = ENV_GET_CPU(env); > - > return qemu_thread_is_self(cpu->thread); > } > > diff --git a/exec.c b/exec.c > index 7899042..e21be32 100644 > --- a/exec.c > +++ b/exec.c > @@ -1685,6 +1685,7 @@ static void cpu_unlink_tb(CPUArchState *env) > /* mask must never be zero, except for A20 change call */ > static void tcg_handle_interrupt(CPUArchState *env, int mask) > { > + CPUState *cpu = ENV_GET_CPU(env); Is there any chance to get rid of expensive cast on this call path? > int old_mask; > > old_mask = env->interrupt_request; > @@ -1694,7 +1695,7 @@ static void tcg_handle_interrupt(CPUArchState *env, int mask) > * If called from iothread context, wake the target cpu in > * case its halted. > */ > - if (!qemu_cpu_is_self(env)) { > + if (!qemu_cpu_is_self(cpu)) { > qemu_cpu_kick(env); > return; > } > diff --git a/hw/apic.c b/hw/apic.c > index ccf2819..1b4cd2f 100644 > --- a/hw/apic.c > +++ b/hw/apic.c > @@ -107,7 +107,7 @@ static void apic_sync_vapic(APICCommonState *s, int sync_type) > length = offsetof(VAPICState, enabled) - offsetof(VAPICState, isr); > > if (sync_type & SYNC_TO_VAPIC) { > - assert(qemu_cpu_is_self(&s->cpu->env)); > + assert(qemu_cpu_is_self(CPU(s->cpu))); > > vapic_state.tpr = s->tpr; > vapic_state.enabled = 1; > @@ -363,10 +363,12 @@ static int apic_irq_pending(APICCommonState *s) > /* signal the CPU if an irq is pending */ > static void apic_update_irq(APICCommonState *s) > { > + CPUState *cpu = CPU(s->cpu); > + > if (!(s->spurious_vec & APIC_SV_ENABLE)) { > return; > } > - if (!qemu_cpu_is_self(&s->cpu->env)) { > + if (!qemu_cpu_is_self(cpu)) { > cpu_interrupt(&s->cpu->env, CPU_INTERRUPT_POLL); > } else if (apic_irq_pending(s) > 0) { > cpu_interrupt(&s->cpu->env, CPU_INTERRUPT_HARD); > diff --git a/include/qemu/cpu.h b/include/qemu/cpu.h > index ad706a6..7be983d 100644 > --- a/include/qemu/cpu.h > +++ b/include/qemu/cpu.h > @@ -78,5 +78,15 @@ struct CPUState { > */ > void cpu_reset(CPUState *cpu); > > +/** > + * qemu_cpu_is_self: > + * @cpu: The vCPU to check against. > + * > + * Checks whether the caller is executing on the vCPU thread. > + * > + * Returns: %true if called from @cpu's thread, %false otherwise. > + */ > +bool qemu_cpu_is_self(CPUState *cpu); > + > > #endif > diff --git a/kvm-all.c b/kvm-all.c > index 92a7137..db01aeb 100644 > --- a/kvm-all.c > +++ b/kvm-all.c > @@ -854,9 +854,11 @@ static MemoryListener kvm_memory_listener = { > > static void kvm_handle_interrupt(CPUArchState *env, int mask) > { > + CPUState *cpu = ENV_GET_CPU(env); > + > env->interrupt_request |= mask; > > - if (!qemu_cpu_is_self(env)) { > + if (!qemu_cpu_is_self(cpu)) { > qemu_cpu_kick(env); > } > } > diff --git a/qemu-common.h b/qemu-common.h > index b54612b..2094742 100644 > --- a/qemu-common.h > +++ b/qemu-common.h > @@ -326,7 +326,6 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id); > /* Unblock cpu */ > void qemu_cpu_kick(void *env); > void qemu_cpu_kick_self(void); > -int qemu_cpu_is_self(void *env); > > /* work queue */ > struct qemu_work_item { > diff --git a/target-i386/kvm.c b/target-i386/kvm.c > index 5b18383..cf3d2f1 100644 > --- a/target-i386/kvm.c > +++ b/target-i386/kvm.c > @@ -1552,9 +1552,10 @@ static int kvm_get_debugregs(CPUX86State *env) > > int kvm_arch_put_registers(CPUX86State *env, int level) > { > + CPUState *cpu = ENV_GET_CPU(env); > int ret; > > - assert(cpu_is_stopped(env) || qemu_cpu_is_self(env)); > + assert(cpu_is_stopped(env) || qemu_cpu_is_self(cpu)); > > ret = kvm_getput_regs(env, 1); > if (ret < 0) { > @@ -1609,9 +1610,10 @@ int kvm_arch_put_registers(CPUX86State *env, int level) > > int kvm_arch_get_registers(CPUX86State *env) > { > + CPUState *cpu = ENV_GET_CPU(env); > int ret; > > - assert(cpu_is_stopped(env) || qemu_cpu_is_self(env)); > + assert(cpu_is_stopped(env) || qemu_cpu_is_self(cpu)); > > ret = kvm_getput_regs(env, 0); > if (ret < 0) { > -- > 1.7.10.4 > > Reviewed-by: Igor Mammedov <imammedo@redhat.com> -- Regards, Igor ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH qom-cpu v2 4/7] cpus: Pass CPUState to qemu_cpu_is_self() 2012-10-16 0:49 ` [Qemu-devel] " Igor Mammedov @ 2012-10-30 20:08 ` Andreas Färber 0 siblings, 0 replies; 3+ messages in thread From: Andreas Färber @ 2012-10-30 20:08 UTC (permalink / raw) To: Igor Mammedov Cc: Marcelo Tosatti, qemu-devel, kvm, Avi Kivity, Alexander Graf Am 16.10.2012 02:49, schrieb Igor Mammedov: > On Fri, 12 Oct 2012 03:26:40 +0200 > Andreas Färber <afaerber@suse.de> wrote: > >> Change return type to bool, move to include/qemu/cpu.h and >> add documentation. >> >> Signed-off-by: Andreas Färber <afaerber@suse.de> >> --- >> cpus.c | 10 ++++------ >> exec.c | 3 ++- >> hw/apic.c | 6 ++++-- >> include/qemu/cpu.h | 10 ++++++++++ >> kvm-all.c | 4 +++- >> qemu-common.h | 1 - >> target-i386/kvm.c | 6 ++++-- >> 7 Dateien geändert, 27 Zeilen hinzugefügt(+), 13 Zeilen entfernt(-) >> >> diff --git a/cpus.c b/cpus.c >> index 750a76f..849ea8a 100644 >> --- a/cpus.c >> +++ b/cpus.c >> @@ -638,9 +638,10 @@ void qemu_init_cpu_loop(void) >> >> void run_on_cpu(CPUArchState *env, void (*func)(void *data), void *data) >> { >> + CPUState *cpu = ENV_GET_CPU(env); >> struct qemu_work_item wi; >> >> - if (qemu_cpu_is_self(env)) { >> + if (qemu_cpu_is_self(cpu)) { >> func(data); >> return; >> } >> @@ -855,7 +856,7 @@ static void qemu_cpu_kick_thread(CPUArchState *env) >> exit(1); >> } >> #else /* _WIN32 */ >> - if (!qemu_cpu_is_self(env)) { >> + if (!qemu_cpu_is_self(cpu)) { >> SuspendThread(cpu->hThread); >> cpu_signal(0); >> ResumeThread(cpu->hThread); >> @@ -890,11 +891,8 @@ void qemu_cpu_kick_self(void) >> #endif >> } >> >> -int qemu_cpu_is_self(void *_env) >> +bool qemu_cpu_is_self(CPUState *cpu) >> { >> - CPUArchState *env = _env; >> - CPUState *cpu = ENV_GET_CPU(env); >> - >> return qemu_thread_is_self(cpu->thread); >> } >> >> diff --git a/exec.c b/exec.c >> index 7899042..e21be32 100644 >> --- a/exec.c >> +++ b/exec.c >> @@ -1685,6 +1685,7 @@ static void cpu_unlink_tb(CPUArchState *env) >> /* mask must never be zero, except for A20 change call */ >> static void tcg_handle_interrupt(CPUArchState *env, int mask) >> { >> + CPUState *cpu = ENV_GET_CPU(env); > Is there any chance to get rid of expensive cast on this call path? I've spent some time investigating this and it would be rather complicated: * We can't change the argument to CPUState yet (pushing the responsibility to the caller) since interrupt_request is being accessed til the not-yet-committable end of original part 4 series, the TB is being flushed, icount being handled, and it is being used for the first if, so not movable to a deeper block. * A pointer to this function (or the KVM version below) is stored as cpu_interrupt_handler and accessed through cpu_interrupt(), which for softmmu calls the handler and for *-user does something similar to the TCG version. This function is being used in a lot of places, so adding a CPUState argument in addition to the CPUArchState would touch a lot of places for an interim solution. * QOM makes no guarantees about subclass layout (.env placement), so going from CPUState to CPUArchState involves quite some ugly #ifdef'fery that I am trying to avoid, going only the I-know-my-type direction. I'll therefore accept your Reviewed-by to apply this and will keep working during the Soft Freeze on the follow-ups that allow changing this and others completely over to CPUState. Alex has just given green light for the ppc prerequisites so I can apply them together with xtensa to qom-cpu and post the next batch if I haven't already. Regards, Andreas > >> int old_mask; >> >> old_mask = env->interrupt_request; >> @@ -1694,7 +1695,7 @@ static void tcg_handle_interrupt(CPUArchState *env, int mask) >> * If called from iothread context, wake the target cpu in >> * case its halted. >> */ >> - if (!qemu_cpu_is_self(env)) { >> + if (!qemu_cpu_is_self(cpu)) { >> qemu_cpu_kick(env); >> return; >> } >> diff --git a/hw/apic.c b/hw/apic.c >> index ccf2819..1b4cd2f 100644 >> --- a/hw/apic.c >> +++ b/hw/apic.c >> @@ -107,7 +107,7 @@ static void apic_sync_vapic(APICCommonState *s, int sync_type) >> length = offsetof(VAPICState, enabled) - offsetof(VAPICState, isr); >> >> if (sync_type & SYNC_TO_VAPIC) { >> - assert(qemu_cpu_is_self(&s->cpu->env)); >> + assert(qemu_cpu_is_self(CPU(s->cpu))); >> >> vapic_state.tpr = s->tpr; >> vapic_state.enabled = 1; >> @@ -363,10 +363,12 @@ static int apic_irq_pending(APICCommonState *s) >> /* signal the CPU if an irq is pending */ >> static void apic_update_irq(APICCommonState *s) >> { >> + CPUState *cpu = CPU(s->cpu); >> + >> if (!(s->spurious_vec & APIC_SV_ENABLE)) { >> return; >> } >> - if (!qemu_cpu_is_self(&s->cpu->env)) { >> + if (!qemu_cpu_is_self(cpu)) { >> cpu_interrupt(&s->cpu->env, CPU_INTERRUPT_POLL); >> } else if (apic_irq_pending(s) > 0) { >> cpu_interrupt(&s->cpu->env, CPU_INTERRUPT_HARD); >> diff --git a/include/qemu/cpu.h b/include/qemu/cpu.h >> index ad706a6..7be983d 100644 >> --- a/include/qemu/cpu.h >> +++ b/include/qemu/cpu.h >> @@ -78,5 +78,15 @@ struct CPUState { >> */ >> void cpu_reset(CPUState *cpu); >> >> +/** >> + * qemu_cpu_is_self: >> + * @cpu: The vCPU to check against. >> + * >> + * Checks whether the caller is executing on the vCPU thread. >> + * >> + * Returns: %true if called from @cpu's thread, %false otherwise. >> + */ >> +bool qemu_cpu_is_self(CPUState *cpu); >> + >> >> #endif >> diff --git a/kvm-all.c b/kvm-all.c >> index 92a7137..db01aeb 100644 >> --- a/kvm-all.c >> +++ b/kvm-all.c >> @@ -854,9 +854,11 @@ static MemoryListener kvm_memory_listener = { >> >> static void kvm_handle_interrupt(CPUArchState *env, int mask) >> { >> + CPUState *cpu = ENV_GET_CPU(env); >> + >> env->interrupt_request |= mask; >> >> - if (!qemu_cpu_is_self(env)) { >> + if (!qemu_cpu_is_self(cpu)) { >> qemu_cpu_kick(env); >> } >> } >> diff --git a/qemu-common.h b/qemu-common.h >> index b54612b..2094742 100644 >> --- a/qemu-common.h >> +++ b/qemu-common.h >> @@ -326,7 +326,6 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id); >> /* Unblock cpu */ >> void qemu_cpu_kick(void *env); >> void qemu_cpu_kick_self(void); >> -int qemu_cpu_is_self(void *env); >> >> /* work queue */ >> struct qemu_work_item { >> diff --git a/target-i386/kvm.c b/target-i386/kvm.c >> index 5b18383..cf3d2f1 100644 >> --- a/target-i386/kvm.c >> +++ b/target-i386/kvm.c >> @@ -1552,9 +1552,10 @@ static int kvm_get_debugregs(CPUX86State *env) >> >> int kvm_arch_put_registers(CPUX86State *env, int level) >> { >> + CPUState *cpu = ENV_GET_CPU(env); >> int ret; >> >> - assert(cpu_is_stopped(env) || qemu_cpu_is_self(env)); >> + assert(cpu_is_stopped(env) || qemu_cpu_is_self(cpu)); >> >> ret = kvm_getput_regs(env, 1); >> if (ret < 0) { >> @@ -1609,9 +1610,10 @@ int kvm_arch_put_registers(CPUX86State *env, int level) >> >> int kvm_arch_get_registers(CPUX86State *env) >> { >> + CPUState *cpu = ENV_GET_CPU(env); >> int ret; >> >> - assert(cpu_is_stopped(env) || qemu_cpu_is_self(env)); >> + assert(cpu_is_stopped(env) || qemu_cpu_is_self(cpu)); >> >> ret = kvm_getput_regs(env, 0); >> if (ret < 0) { >> -- >> 1.7.10.4 >> >> > Reviewed-by: Igor Mammedov <imammedo@redhat.com> > -- SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg ^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <1350005203-15405-1-git-send-email-afaerber@suse.de>
2012-10-12 1:26 ` [PATCH qom-cpu v2 4/7] cpus: Pass CPUState to qemu_cpu_is_self() Andreas Färber
2012-10-16 0:49 ` [Qemu-devel] " Igor Mammedov
2012-10-30 20:08 ` Andreas Färber
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