svm: Fix improper check when deactivate AVIC

The function svm_refresh_apicv_exec_ctrl() always returning prematurely
as kvm_vcpu_apicv_active() always return false when calling from
the function arch/x86/kvm/x86.c:kvm_vcpu_deactivate_apicv().
This is because the apicv_active is set to false just before calling
refresh_apicv_exec_ctrl().

Also, we need to mark VMCB_AVIC bit as dirty instead of VMCB_INTR.

So, fix svm_refresh_apicv_exec_ctrl() to properly deactivate AVIC.

Fixes: 67034bb9dd5e ('KVM: SVM: Add irqchip_split() checks before enabling AVIC')
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 01b66bbcdd7afebb218878e65ac70a62bfa3aa19..74ceda470eae65441a8cdfa35478acbf0821b7ec 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5122,11 +5122,11 @@ static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
        struct vcpu_svm *svm = to_svm(vcpu);
        struct vmcb *vmcb = svm->vmcb;
 
-       if (!kvm_vcpu_apicv_active(&svm->vcpu))
-               return;
-
-       vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
-       mark_dirty(vmcb, VMCB_INTR);
+       if (kvm_vcpu_apicv_active(vcpu))
+               vmcb->control.int_ctl |= AVIC_ENABLE_MASK;
+       else
+               vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
+       mark_dirty(vmcb, VMCB_AVIC);
 }
 
 static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)