KVM: x86: VMX: set irr_pending in kvm_apic_update_irr

When the APICv is inhibited, the irr_pending optimization is used.

Therefore, when kvm_apic_update_irr sets bits in the IRR,
it must set irr_pending to true as well.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20230726135945.260841-3-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index b17b37e..a983a16 100644 (file)
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -666,8 +666,11 @@ EXPORT_SYMBOL_GPL(__kvm_apic_update_irr);
 bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir, int *max_irr)
 {
        struct kvm_lapic *apic = vcpu->arch.apic;
+       bool irr_updated = __kvm_apic_update_irr(pir, apic->regs, max_irr);
 
-       return __kvm_apic_update_irr(pir, apic->regs, max_irr);
+       if (unlikely(!apic->apicv_active && irr_updated))
+               apic->irr_pending = true;
+       return irr_updated;
 }
 EXPORT_SYMBOL_GPL(kvm_apic_update_irr);