From: Andrew Honig <ahonig@xxxxxxxxxx>
Prior to this change if userspace set the local apic state while there
was a posted interrupt waiting, then the posted interrupt would not be
cleared.
To fix this issue we clear all the not-yet-delivered posted interrupts
and put them in the apic, so that when userspace overwrites the apic,
registers, it also clears any posted interrupts.
Signed-off-by: Andrew Honig <ahonig@xxxxxxxxxx>
Signed-off-by: Peter Shier <pshier@xxxxxxxxxx>
---
arch/x86/kvm/x86.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0046aa70205aa..cbb097946d32f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3163,6 +3163,9 @@ static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
{
int r;
+ if (vcpu->arch.apicv_active)
+ kvm_x86_ops->sync_pir_to_irr(vcpu);
+
r = kvm_apic_set_state(vcpu, s);
if (r)
return r;
--
2.18.0.203.gfac676dfb9-goog
