diff options
| author | Philippe Mathieu-Daudé <f4bug@amsat.org> | 2022-02-03 01:58:55 +0100 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <f4bug@amsat.org> | 2022-03-06 13:15:42 +0100 |
| commit | ad7d684dfde391de6fe5c0680f73097072fbf03a (patch) | |
| tree | 4438c3a4296761b37187a6eff152f9a10441e916 | |
| parent | 5f74af8bab3978b766bdf78255079da3b8a1a888 (diff) | |
accel: Introduce AccelOpsClass::cpu_thread_is_idle()
Add cpu_thread_is_idle() to AccelOps, and implement it for the
KVM / WHPX accelerators.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220207075426.81934-11-f4bug@amsat.org>
| -rw-r--r-- | accel/kvm/kvm-accel-ops.c | 6 | ||||
| -rw-r--r-- | include/sysemu/accel-ops.h | 1 | ||||
| -rw-r--r-- | softmmu/cpus.c | 6 | ||||
| -rw-r--r-- | target/i386/whpx/whpx-accel-ops.c | 6 |
4 files changed, 17 insertions, 2 deletions
diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c index 7516c67a3f..95b7b08020 100644 --- a/accel/kvm/kvm-accel-ops.c +++ b/accel/kvm/kvm-accel-ops.c @@ -74,11 +74,17 @@ static void kvm_start_vcpu_thread(CPUState *cpu) cpu, QEMU_THREAD_JOINABLE); } +static bool kvm_vcpu_thread_is_idle(CPUState *cpu) +{ + return !kvm_halt_in_kernel(); +} + static void kvm_accel_ops_class_init(ObjectClass *oc, void *data) { AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); ops->create_vcpu_thread = kvm_start_vcpu_thread; + ops->cpu_thread_is_idle = kvm_vcpu_thread_is_idle; ops->synchronize_post_reset = kvm_cpu_synchronize_post_reset; ops->synchronize_post_init = kvm_cpu_synchronize_post_init; ops->synchronize_state = kvm_cpu_synchronize_state; diff --git a/include/sysemu/accel-ops.h b/include/sysemu/accel-ops.h index 032f6979d7..50c72540c7 100644 --- a/include/sysemu/accel-ops.h +++ b/include/sysemu/accel-ops.h @@ -30,6 +30,7 @@ struct AccelOpsClass { void (*create_vcpu_thread)(CPUState *cpu); /* MANDATORY NON-NULL */ void (*kick_vcpu_thread)(CPUState *cpu); + bool (*cpu_thread_is_idle)(CPUState *cpu); void (*synchronize_post_reset)(CPUState *cpu); void (*synchronize_post_init)(CPUState *cpu); diff --git a/softmmu/cpus.c b/softmmu/cpus.c index ac6bec5603..b17033d3bc 100644 --- a/softmmu/cpus.c +++ b/softmmu/cpus.c @@ -90,10 +90,12 @@ bool cpu_thread_is_idle(CPUState *cpu) if (cpu_is_stopped(cpu)) { return true; } - if (!cpu->halted || cpu_has_work(cpu) || - kvm_halt_in_kernel() || whpx_apic_in_platform()) { + if (!cpu->halted || cpu_has_work(cpu)) { return false; } + if (cpus_accel->cpu_thread_is_idle) { + return cpus_accel->cpu_thread_is_idle(cpu); + } return true; } diff --git a/target/i386/whpx/whpx-accel-ops.c b/target/i386/whpx/whpx-accel-ops.c index 6bc47c5309..1d30e4e2ed 100644 --- a/target/i386/whpx/whpx-accel-ops.c +++ b/target/i386/whpx/whpx-accel-ops.c @@ -83,12 +83,18 @@ static void whpx_kick_vcpu_thread(CPUState *cpu) } } +static bool whpx_vcpu_thread_is_idle(CPUState *cpu) +{ + return !whpx_apic_in_platform(); +} + static void whpx_accel_ops_class_init(ObjectClass *oc, void *data) { AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); ops->create_vcpu_thread = whpx_start_vcpu_thread; ops->kick_vcpu_thread = whpx_kick_vcpu_thread; + ops->cpu_thread_is_idle = whpx_vcpu_thread_is_idle; ops->synchronize_post_reset = whpx_cpu_synchronize_post_reset; ops->synchronize_post_init = whpx_cpu_synchronize_post_init; |