diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 9c56b6429cb6dddd30eb74640685530de029b0a9..ca1cfb124d4ff480e1a1b35fe1309ce13ff1999e 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -1778,6 +1778,11 @@ int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) return 0; } +int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) +{ + return 0; +} + gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) { return gfn; diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index f62588cb75f89a980617d8b637d5a7cee21fef85..fcd1ed8015c1c2d3b4f4dbdca4f202ffc2dd281a 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -325,6 +325,11 @@ int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) return rc; } +int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) +{ + return 0; +} + int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) { u64 now, sltime; diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index 9f118e2f350d656d423530c3a8b5a1c5a55d0b7f..ed1af80432b32cb6a18f9543c568b4df05b8a6c2 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -212,6 +212,16 @@ int __pit_timer_fn(struct kvm_kpit_state *ps) return (pt->period == 0 ? 0 : 1); } +int pit_has_pending_timer(struct kvm_vcpu *vcpu) +{ + struct kvm_pit *pit = vcpu->kvm->arch.vpit; + + if (pit && vcpu->vcpu_id == 0) + return atomic_read(&pit->pit_state.pit_timer.pending); + + return 0; +} + static enum hrtimer_restart pit_timer_fn(struct hrtimer *data) { struct kvm_kpit_state *ps; diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c index dbfe21c99c487380f926a8497b9a20bef61def35..ce1f583459b1f4875db0d3eeea72d728aa0a9873 100644 --- a/arch/x86/kvm/irq.c +++ b/arch/x86/kvm/irq.c @@ -25,6 +25,21 @@ #include "irq.h" #include "i8254.h" +/* + * check if there are pending timer events + * to be processed. + */ +int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) +{ + int ret; + + ret = pit_has_pending_timer(vcpu); + ret |= apic_has_pending_timer(vcpu); + + return ret; +} +EXPORT_SYMBOL(kvm_cpu_has_pending_timer); + /* * check if there is pending interrupt without * intack. diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h index fa5ed5d59b5da9fa83529b42e09301f25f97f87a..1802134b836fc352529f59e6fd7b82b81ef28e95 100644 --- a/arch/x86/kvm/irq.h +++ b/arch/x86/kvm/irq.h @@ -85,4 +85,7 @@ void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); +int pit_has_pending_timer(struct kvm_vcpu *vcpu); +int apic_has_pending_timer(struct kvm_vcpu *vcpu); + #endif diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 31280df7d2e31a70d0eccfe521434a8cc1968826..debf58211bdd2999eb9afe8ad57fe285abd90f71 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -952,6 +952,16 @@ static int __apic_timer_fn(struct kvm_lapic *apic) return result; } +int apic_has_pending_timer(struct kvm_vcpu *vcpu) +{ + struct kvm_lapic *lapic = vcpu->arch.apic; + + if (lapic) + return atomic_read(&lapic->timer.pending); + + return 0; +} + static int __inject_apic_timer_irq(struct kvm_lapic *apic) { int vector; diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index bd0c2d2d840f38e4cb63cd27fe867df159ece047..0bc400387cae405fcc0ce6048d918db39cd72924 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -269,6 +269,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm); int kvm_cpu_get_interrupt(struct kvm_vcpu *v); int kvm_cpu_has_interrupt(struct kvm_vcpu *v); +int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); void kvm_vcpu_kick(struct kvm_vcpu *vcpu); static inline void kvm_guest_enter(void) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index d5911d9895c3d6867d8e289dc520b8a6a6a52c62..47cbc6e3fafdffb3690e3eeaafbf94f9f8604fc9 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -765,6 +765,7 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu) * We will block until either an interrupt or a signal wakes us up */ while (!kvm_cpu_has_interrupt(vcpu) + && !kvm_cpu_has_pending_timer(vcpu) && !signal_pending(current) && !kvm_arch_vcpu_runnable(vcpu)) { set_current_state(TASK_INTERRUPTIBLE);