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KVM: vmx: clear pending interrupts on KVM_SET_LAPIC

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Pending interrupts might be in the PI descriptor when the
LAPIC is restored from an external state; we do not want
them to be injected.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-12-19 14:03:45 +01:00
parent db1c056cee
commit 967235d320
2 changed files with 10 additions and 2 deletions
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3
arch/x86/kvm/lapic.c
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@ -2204,8 +2204,7 @@ int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s)
1 : count_vectors(apic->regs + APIC_ISR);
apic->highest_isr_cache = -1;
if (vcpu->arch.apicv_active) {
if (kvm_x86_ops->apicv_post_state_restore)
kvm_x86_ops->apicv_post_state_restore(vcpu);
kvm_x86_ops->apicv_post_state_restore(vcpu);
kvm_x86_ops->hwapic_irr_update(vcpu,
apic_find_highest_irr(apic));
kvm_x86_ops->hwapic_isr_update(vcpu,

9
arch/x86/kvm/vmx.c
View File

@ -8749,6 +8749,14 @@ static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
vmcs_write64(EOI_EXIT_BITMAP3, eoi_exit_bitmap[3]);
}
static void vmx_apicv_post_state_restore(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
pi_clear_on(&vmx->pi_desc);
memset(vmx->pi_desc.pir, 0, sizeof(vmx->pi_desc.pir));
}
static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
{
u32 exit_intr_info;
@ -11574,6 +11582,7 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.get_enable_apicv = vmx_get_enable_apicv,
.refresh_apicv_exec_ctrl = vmx_refresh_apicv_exec_ctrl,
.load_eoi_exitmap = vmx_load_eoi_exitmap,
.apicv_post_state_restore = vmx_apicv_post_state_restore,
.hwapic_irr_update = vmx_hwapic_irr_update,
.hwapic_isr_update = vmx_hwapic_isr_update,
.sync_pir_to_irr = vmx_sync_pir_to_irr,