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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-05 13:45:35 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-15 19:26:21 +0300 |
| commit | 199a8b84c455cfeb81bc060c6824dea473e54dc3 (patch) | |
| tree | 712d3d44d5b6f138da8675fad7b7aeb8cb975736 /arch/x86/kvm/lapic.c | |
| parent | 379a3c8ee44440d5afa505230ed8cb5b0d0e314b (diff) | |
| download | linux-199a8b84c455cfeb81bc060c6824dea473e54dc3.tar.xz | |
KVM: x86: introduce kvm_can_use_hv_timer
Replace the ad hoc test in vmx_set_hv_timer with a test in the caller,
start_hv_timer. This test is not Intel-specific and would be duplicated
when introducing the fast path for the TSC deadline MSR.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 42cd2e3ec6fd..73e51abca21d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -110,11 +110,18 @@ static inline u32 kvm_x2apic_id(struct kvm_lapic *apic) return apic->vcpu->vcpu_id; } -bool kvm_can_post_timer_interrupt(struct kvm_vcpu *vcpu) +static bool kvm_can_post_timer_interrupt(struct kvm_vcpu *vcpu) { return pi_inject_timer && kvm_vcpu_apicv_active(vcpu); } -EXPORT_SYMBOL_GPL(kvm_can_post_timer_interrupt); + +bool kvm_can_use_hv_timer(struct kvm_vcpu *vcpu) +{ + return kvm_x86_ops.set_hv_timer + && !(kvm_mwait_in_guest(vcpu->kvm) || + kvm_can_post_timer_interrupt(vcpu)); +} +EXPORT_SYMBOL_GPL(kvm_can_use_hv_timer); static bool kvm_use_posted_timer_interrupt(struct kvm_vcpu *vcpu) { @@ -1788,7 +1795,7 @@ static bool start_hv_timer(struct kvm_lapic *apic) bool expired; WARN_ON(preemptible()); - if (!kvm_x86_ops.set_hv_timer) + if (!kvm_can_use_hv_timer(vcpu)) return false; if (!ktimer->tscdeadline) |