From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from zen.linaroharston ([185.81.254.11]) by smtp.gmail.com with ESMTPSA id m10-20020a05600c3b0a00b003b47b913901sm25520688wms.1.2022.09.26.06.39.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Sep 2022 06:39:12 -0700 (PDT) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 1E5BE1FFC3; Mon, 26 Sep 2022 14:39:06 +0100 (BST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: f4bug@amsat.org, mads@ynddal.dk, qemu-arm@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , Paolo Bonzini , Richard Henderson , kvm@vger.kernel.org (open list:Overall KVM CPUs) Subject: [PATCH v2 11/11] gdbstub: move guest debug support check to ops Date: Mon, 26 Sep 2022 14:39:04 +0100 Message-Id: <20220926133904.3297263-12-alex.bennee@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220926133904.3297263-1-alex.bennee@linaro.org> References: <20220926133904.3297263-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TUID: Z1TfmbPdHZv9 This removes the final hard coding of kvm_enabled() in gdbstub and moves the check to an AccelOps. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Alex Bennée Cc: Mads Ynddal --- accel/kvm/kvm-cpus.h | 1 + gdbstub/internals.h | 1 + include/sysemu/accel-ops.h | 1 + include/sysemu/kvm.h | 7 ------- accel/kvm/kvm-accel-ops.c | 1 + accel/kvm/kvm-all.c | 6 ++++++ accel/tcg/tcg-accel-ops.c | 6 ++++++ gdbstub/gdbstub.c | 5 ++--- gdbstub/softmmu.c | 9 +++++++++ gdbstub/user.c | 6 ++++++ 10 files changed, 33 insertions(+), 10 deletions(-) diff --git a/accel/kvm/kvm-cpus.h b/accel/kvm/kvm-cpus.h index 33e435d62b..fd63fe6a59 100644 --- a/accel/kvm/kvm-cpus.h +++ b/accel/kvm/kvm-cpus.h @@ -18,6 +18,7 @@ void kvm_destroy_vcpu(CPUState *cpu); void kvm_cpu_synchronize_post_reset(CPUState *cpu); void kvm_cpu_synchronize_post_init(CPUState *cpu); void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu); +bool kvm_supports_guest_debug(void); int kvm_insert_breakpoint(CPUState *cpu, int type, hwaddr addr, hwaddr len); int kvm_remove_breakpoint(CPUState *cpu, int type, hwaddr addr, hwaddr len); void kvm_remove_all_breakpoints(CPUState *cpu); diff --git a/gdbstub/internals.h b/gdbstub/internals.h index 41e2e72dbf..eabb0341d1 100644 --- a/gdbstub/internals.h +++ b/gdbstub/internals.h @@ -9,6 +9,7 @@ #ifndef _INTERNALS_H_ #define _INTERNALS_H_ +bool gdb_supports_guest_debug(void); int gdb_breakpoint_insert(CPUState *cs, int type, hwaddr addr, hwaddr len); int gdb_breakpoint_remove(CPUState *cs, int type, hwaddr addr, hwaddr len); void gdb_breakpoint_remove_all(CPUState *cs); diff --git a/include/sysemu/accel-ops.h b/include/sysemu/accel-ops.h index 86794ac273..8cc7996def 100644 --- a/include/sysemu/accel-ops.h +++ b/include/sysemu/accel-ops.h @@ -47,6 +47,7 @@ struct AccelOpsClass { int64_t (*get_elapsed_ticks)(void); /* gdbstub hooks */ + bool (*supports_guest_debug)(void); int (*insert_breakpoint)(CPUState *cpu, int type, hwaddr addr, hwaddr len); int (*remove_breakpoint)(CPUState *cpu, int type, hwaddr addr, hwaddr len); void (*remove_all_breakpoints)(CPUState *cpu); diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index 21d3f1d01e..6e1bd01725 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -46,7 +46,6 @@ extern bool kvm_readonly_mem_allowed; extern bool kvm_direct_msi_allowed; extern bool kvm_ioeventfd_any_length_allowed; extern bool kvm_msi_use_devid; -extern bool kvm_has_guest_debug; #define kvm_enabled() (kvm_allowed) /** @@ -168,11 +167,6 @@ extern bool kvm_has_guest_debug; */ #define kvm_msi_devid_required() (kvm_msi_use_devid) -/* - * Does KVM support guest debugging - */ -#define kvm_supports_guest_debug() (kvm_has_guest_debug) - #else #define kvm_enabled() (0) @@ -190,7 +184,6 @@ extern bool kvm_has_guest_debug; #define kvm_direct_msi_enabled() (false) #define kvm_ioeventfd_any_length_enabled() (false) #define kvm_msi_devid_required() (false) -#define kvm_supports_guest_debug() (false) #endif /* CONFIG_KVM_IS_POSSIBLE */ diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c index 5c0e37514c..fbf4fe3497 100644 --- a/accel/kvm/kvm-accel-ops.c +++ b/accel/kvm/kvm-accel-ops.c @@ -99,6 +99,7 @@ static void kvm_accel_ops_class_init(ObjectClass *oc, void *data) ops->synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm; #ifdef KVM_CAP_SET_GUEST_DEBUG + ops->supports_guest_debug = kvm_supports_guest_debug; ops->insert_breakpoint = kvm_insert_breakpoint; ops->remove_breakpoint = kvm_remove_breakpoint; ops->remove_all_breakpoints = kvm_remove_all_breakpoints; diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index b8c734fe3a..6ebff6e5a6 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -3287,6 +3287,12 @@ int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) return data.err; } +bool kvm_supports_guest_debug(void) +{ + /* probed during kvm_init() */ + return kvm_has_guest_debug; +} + int kvm_insert_breakpoint(CPUState *cpu, int type, hwaddr addr, hwaddr len) { struct kvm_sw_breakpoint *bp; diff --git a/accel/tcg/tcg-accel-ops.c b/accel/tcg/tcg-accel-ops.c index 965c2ad581..19cbf1db3a 100644 --- a/accel/tcg/tcg-accel-ops.c +++ b/accel/tcg/tcg-accel-ops.c @@ -93,6 +93,11 @@ void tcg_handle_interrupt(CPUState *cpu, int mask) } } +static bool tcg_supports_guest_debug(void) +{ + return true; +} + /* Translate GDB watchpoint type to a flags value for cpu_watchpoint_* */ static inline int xlat_gdb_type(CPUState *cpu, int gdbtype) { @@ -198,6 +203,7 @@ static void tcg_accel_ops_init(AccelOpsClass *ops) } } + ops->supports_guest_debug = tcg_supports_guest_debug; ops->insert_breakpoint = tcg_insert_breakpoint; ops->remove_breakpoint = tcg_remove_breakpoint; ops->remove_all_breakpoints = tcg_remove_all_breakpoints; diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c index ff9f3f9586..be88ca0d71 100644 --- a/gdbstub/gdbstub.c +++ b/gdbstub/gdbstub.c @@ -45,7 +45,6 @@ #include "qemu/sockets.h" #include "sysemu/hw_accel.h" -#include "sysemu/kvm.h" #include "sysemu/runstate.h" #include "semihosting/semihost.h" #include "exec/exec-all.h" @@ -3447,8 +3446,8 @@ int gdbserver_start(const char *device) return -1; } - if (kvm_enabled() && !kvm_supports_guest_debug()) { - error_report("gdbstub: KVM doesn't support guest debugging"); + if (!gdb_supports_guest_debug()) { + error_report("gdbstub: current accelerator doesn't support guest debugging"); return -1; } diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c index 4e73890379..f208c6cf15 100644 --- a/gdbstub/softmmu.c +++ b/gdbstub/softmmu.c @@ -15,6 +15,15 @@ #include "sysemu/cpus.h" #include "internals.h" +bool gdb_supports_guest_debug(void) +{ + const AccelOpsClass *ops = cpus_get_accel(); + if (ops->supports_guest_debug) { + return ops->supports_guest_debug(); + } + return false; +} + int gdb_breakpoint_insert(CPUState *cs, int type, hwaddr addr, hwaddr len) { const AccelOpsClass *ops = cpus_get_accel(); diff --git a/gdbstub/user.c b/gdbstub/user.c index 42652b28a7..033e5fdd71 100644 --- a/gdbstub/user.c +++ b/gdbstub/user.c @@ -14,6 +14,12 @@ #include "hw/core/cpu.h" #include "internals.h" +bool gdb_supports_guest_debug(void) +{ + /* user-mode == TCG == supported */ + return true; +} + int gdb_breakpoint_insert(CPUState *cs, int type, hwaddr addr, hwaddr len) { CPUState *cpu; -- 2.34.1