When APIC mode is updated (e.g. from xAPIC to x2APIC),
KVM needs to update AVIC settings accordingly, whic is
handled by svm_refresh_apicv_exec_ctrl().
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
---
arch/x86/kvm/svm/avic.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c
index 7e5a39a8e698..53559b8dfa52 100644
--- a/arch/x86/kvm/svm/avic.c
+++ b/arch/x86/kvm/svm/avic.c
@@ -625,7 +625,24 @@ void avic_post_state_restore(struct kvm_vcpu *vcpu)
void svm_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
{
- return;
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ if (!lapic_in_kernel(vcpu) || (avic_mode == AVIC_MODE_NONE))
+ return;
+
+ if (kvm_get_apic_mode(vcpu) == LAPIC_MODE_INVALID)
+ WARN_ONCE(true, "Invalid local APIC state");
+
+ svm->vmcb->control.avic_vapic_bar = svm->vcpu.arch.apic_base &
+ VMCB_AVIC_APIC_BAR_MASK;
+ kvm_vcpu_update_apicv(&svm->vcpu);
+
+ /*
+ * The VM could be running w/ AVIC activated switching from APIC
+ * to x2APIC mode. We need to all refresh to make sure that all
+ * x2AVIC configuration are being done.
+ */
+ svm_refresh_apicv_exec_ctrl(&svm->vcpu);
}
void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
--
2.25.1
