search for: kvm_arch_vcpu_put

...->arch.st.steal.preempted = 1; > + > + kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime, > + &vcpu->arch.st.steal.preempted, > + offsetof(struct kvm_steal_time, preempted), > + sizeof(vcpu->arch.st.steal.preempted)); > +} > + > void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) > { > + kvm_steal_time_set_preempted(vcpu); > kvm_x86_ops->vcpu_put(vcpu); > kvm_put_guest_fpu(vcpu); > vcpu->arch.last_host_tsc = rdtsc(); You can't call kvm_steal_time_set_preempted in atomic context (neither in sched_out notifier nor in vcp...

...->arch.st.steal.preempted = 1; > + > + kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime, > + &vcpu->arch.st.steal.preempted, > + offsetof(struct kvm_steal_time, preempted), > + sizeof(vcpu->arch.st.steal.preempted)); > +} > + > void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) > { > + kvm_steal_time_set_preempted(vcpu); > kvm_x86_ops->vcpu_put(vcpu); > kvm_put_guest_fpu(vcpu); > vcpu->arch.last_host_tsc = rdtsc(); You can't call kvm_steal_time_set_preempted in atomic context (neither in sched_out notifier nor in vcp...

...; >> + >> + kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime, >> + &vcpu->arch.st.steal.preempted, >> + offsetof(struct kvm_steal_time, preempted), >> + sizeof(vcpu->arch.st.steal.preempted)); >> +} >> + >> void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) >> { >> + kvm_steal_time_set_preempted(vcpu); >> kvm_x86_ops->vcpu_put(vcpu); >> kvm_put_guest_fpu(vcpu); >> vcpu->arch.last_host_tsc = rdtsc(); > > You can't call kvm_steal_time_set_preempted in atomic context (neither &gt...

...pu_load(struct kvm_vcpu *vcpu, int cpu) >> vcpu_set_wfx_traps(vcpu); >> >> vcpu_ptrauth_setup_lazy(vcpu); >> + >> + if (kvm_arm_is_pvlock_preempted_ready(&vcpu->arch)) >> + kvm_update_pvlock_preempted(vcpu, 0); >> } >> >> void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) >> @@ -434,6 +439,9 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) >> vcpu->cpu = -1; >> >> kvm_arm_set_running_vcpu(NULL); >> + >> + if (kvm_arm_is_pvlock_preempted_ready(&vcpu->arch)) >> + kvm_update_pvlock_preemp...

...gt; > + vcpu->arch.st.steal.preempted = 0; > + > if (vcpu->arch.st.steal.version & 1) > vcpu->arch.st.steal.version += 1; /* first time write, random junk */ > > @@ -2812,6 +2814,16 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) > > void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) > { > + if (vcpu->arch.st.msr_val & KVM_MSR_ENABLED) > + if (kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, > + &vcpu->arch.st.steal, > + sizeof(struct kvm_steal_time)) == 0) { > + vcpu->arch.st.steal.preempted...

...gt; > + vcpu->arch.st.steal.preempted = 0; > + > if (vcpu->arch.st.steal.version & 1) > vcpu->arch.st.steal.version += 1; /* first time write, random junk */ > > @@ -2812,6 +2814,16 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) > > void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) > { > + if (vcpu->arch.st.msr_val & KVM_MSR_ENABLED) > + if (kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, > + &vcpu->arch.st.steal, > + sizeof(struct kvm_steal_time)) == 0) { > + vcpu->arch.st.steal.preempted...

...p; KVM_MSR_ENABLED)) + return; + + vcpu->arch.st.steal.preempted = 1; + + kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime, + &vcpu->arch.st.steal.preempted, + offsetof(struct kvm_steal_time, preempted), + sizeof(vcpu->arch.st.steal.preempted)); +} + void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) { + kvm_steal_time_set_preempted(vcpu); kvm_x86_ops->vcpu_put(vcpu); kvm_put_guest_fpu(vcpu); vcpu->arch.last_host_tsc = rdtsc(); -- 2.4.11

change from v6: fix typos and remove uncessary comments. change from v5: spilt x86/kvm patch into guest/host part. introduce kvm_write_guest_offset_cached. fix some typos. rebase patch onto 4.9.2 change from v4: spilt x86 kvm vcpu preempted check into two patches. add documentation patch. add x86 vcpu preempted check patch under xen add s390 vcpu preempted check patch change from v3:

change from v6: fix typos and remove uncessary comments. change from v5: spilt x86/kvm patch into guest/host part. introduce kvm_write_guest_offset_cached. fix some typos. rebase patch onto 4.9.2 change from v4: spilt x86 kvm vcpu preempted check into two patches. add documentation patch. add x86 vcpu preempted check patch under xen add s390 vcpu preempted check patch change from v3:

...;kvm, &vcpu->arch.st.stime, + &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) + return; + + vcpu->arch.st.steal.preempted = 1; + + kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, + &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); +} + void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) { + kvm_steal_time_set_preempted(vcpu); kvm_x86_ops->vcpu_put(vcpu); kvm_put_guest_fpu(vcpu); vcpu->arch.last_host_tsc = rdtsc(); -- 2.4.11

From: Zengruan Ye <yezengruan at huawei.com> This patch set aims to support the vcpu_is_preempted() functionality under KVM/arm64, which allowing the guest to obtain the vcpu is currently running or not. This will enhance lock performance on overcommitted hosts (more runnable vcpus than physical cpus in the system) as doing busy waits for preempted vcpus will hurt system performance far

From: Zengruan Ye <yezengruan at huawei.com> This patch set aims to support the vcpu_is_preempted() functionality under KVM/arm64, which allowing the guest to obtain the vcpu is currently running or not. This will enhance lock performance on overcommitted hosts (more runnable vcpus than physical cpus in the system) as doing busy waits for preempted vcpus will hurt system performance far

...sizeof(struct kvm_steal_time)))) return; + vcpu->arch.st.steal.preempted = 0; + if (vcpu->arch.st.steal.version & 1) vcpu->arch.st.steal.version += 1; /* first time write, random junk */ @@ -2812,6 +2814,16 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) { + if (vcpu->arch.st.msr_val & KVM_MSR_ENABLED) + if (kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, + &vcpu->arch.st.steal, + sizeof(struct kvm_steal_time)) == 0) { + vcpu->arch.st.steal.preempted = 1; + kvm_write_guest_cache...

This patch set aims to support the vcpu_is_preempted() functionality under KVM/arm64, which allowing the guest to obtain the VCPU is currently running or not. This will enhance lock performance on overcommitted hosts (more runnable VCPUs than physical CPUs in the system) as doing busy waits for preempted VCPUs will hurt system performance far worse than early yielding. We have observed some

change from v4: spilt x86 kvm vcpu preempted check into two patches. add documentation patch. add x86 vcpu preempted check patch under xen add s390 vcpu preempted check patch change from v3: add x86 vcpu preempted check patch change from v2: no code change, fix typos, update some comments change from v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc,

change from v4: spilt x86 kvm vcpu preempted check into two patches. add documentation patch. add x86 vcpu preempted check patch under xen add s390 vcpu preempted check patch change from v3: add x86 vcpu preempted check patch change from v2: no code change, fix typos, update some comments change from v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc,

change from v3: add x86 vcpu preempted check patch change from v2: no code change, fix typos, update some comments change from v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion.

change from v3: add x86 vcpu preempted check patch change from v2: no code change, fix typos, update some comments change from v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion.

...h.host_acrs); + vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; + restore_fp_regs(&vcpu->arch.guest_fpregs); + restore_access_regs(vcpu->arch.guest_acrs); + + if (signal_pending(current)) + atomic_set_mask(CPUSTAT_STOP_INT, + &vcpu->arch.sie_block->cpuflags); +} + +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) +{ + save_fp_regs(&vcpu->arch.guest_fpregs); + save_access_regs(vcpu->arch.guest_acrs); + restore_fp_regs(&vcpu->arch.host_fpregs); + restore_access_regs(vcpu->arch.host_acrs); +} + +static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) +{ + /* th...

...h.host_acrs); + vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; + restore_fp_regs(&vcpu->arch.guest_fpregs); + restore_access_regs(vcpu->arch.guest_acrs); + + if (signal_pending(current)) + atomic_set_mask(CPUSTAT_STOP_INT, + &vcpu->arch.sie_block->cpuflags); +} + +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) +{ + save_fp_regs(&vcpu->arch.guest_fpregs); + save_access_regs(vcpu->arch.guest_acrs); + restore_fp_regs(&vcpu->arch.host_fpregs); + restore_access_regs(vcpu->arch.host_acrs); +} + +static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) +{ + /* th...