linux-kernel - [PATCH 5.4 115/132] KVM: VMX: Dont freeze guest when event delivery causes an APIC-access exit

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Message-Id: <20200915140649.873623216@linuxfoundation.org>
Date:   Tue, 15 Sep 2020 16:13:37 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wanpeng Li <wanpengli@...cent.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH 5.4 115/132] KVM: VMX: Dont freeze guest when event delivery causes an APIC-access exit

From: Wanpeng Li <wanpengli@...cent.com>

commit 99b82a1437cb31340dbb2c437a2923b9814a7b15 upstream.

According to SDM 27.2.4, Event delivery causes an APIC-access VM exit.
Don't report internal error and freeze guest when event delivery causes
an APIC-access exit, it is handleable and the event will be re-injected
during the next vmentry.

Signed-off-by: Wanpeng Li <wanpengli@...cent.com>
Message-Id: <1597827327-25055-2-git-send-email-wanpengli@...cent.com>
Cc: stable@...r.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/kvm/vmx/vmx.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -5895,6 +5895,7 @@ static int vmx_handle_exit(struct kvm_vc
 			(exit_reason != EXIT_REASON_EXCEPTION_NMI &&
 			exit_reason != EXIT_REASON_EPT_VIOLATION &&
 			exit_reason != EXIT_REASON_PML_FULL &&
+			exit_reason != EXIT_REASON_APIC_ACCESS &&
 			exit_reason != EXIT_REASON_TASK_SWITCH)) {
 		vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 		vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV;