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Subject[PATCH] KVM: SVM: Analyze is_guest_mode() in svm_vcpu_run()
Date
From: Wanpeng Li <wanpengli@tencent.com>

Analyze is_guest_mode() in svm_vcpu_run() instead of svm_exit_handlers_fastpath()
in conformity with VMX version.

Suggested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
arch/x86/kvm/svm/svm.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 3da5b2f..009035a 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3393,8 +3393,7 @@ static void svm_cancel_injection(struct kvm_vcpu *vcpu)

static fastpath_t svm_exit_handlers_fastpath(struct kvm_vcpu *vcpu)
{
- if (!is_guest_mode(vcpu) &&
- to_svm(vcpu)->vmcb->control.exit_code == SVM_EXIT_MSR &&
+ if (to_svm(vcpu)->vmcb->control.exit_code == SVM_EXIT_MSR &&
to_svm(vcpu)->vmcb->control.exit_info_1)
return handle_fastpath_set_msr_irqoff(vcpu);

@@ -3580,6 +3579,10 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
svm_handle_mce(svm);

svm_complete_interrupts(svm);
+
+ if (is_guest_mode(vcpu))
+ return EXIT_FASTPATH_NONE;
+
exit_fastpath = svm_exit_handlers_fastpath(vcpu);
return exit_fastpath;
}
--
2.7.4
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