From: Maxim Levitsky mlevitsk@redhat.com
stable inclusion from linux-4.19.200 commit da84e8e9290e5a8f5ba2eda669ba41d6f8e94c20
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commit b97f074583736c42fb36f2da1164e28c73758912 upstream.
A page fault can be queued while vCPU is in real paged mode on AMD, and AMD manual asks the user to always intercept it (otherwise result is undefined). The resulting VM exit, does have an error code.
Signed-off-by: Maxim Levitsky mlevitsk@redhat.com Message-Id: 20210225154135.405125-2-mlevitsk@redhat.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Zubin Mithra zsm@chromium.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- arch/x86/kvm/x86.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index afe275f045981..a501ff7bdac98 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -460,8 +460,6 @@ static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
if (!vcpu->arch.exception.pending && !vcpu->arch.exception.injected) { queue: - if (has_error && !is_protmode(vcpu)) - has_error = false; if (reinject) { /* * On vmentry, vcpu->arch.exception.pending is only @@ -7202,6 +7200,13 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu) kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); }
+static void kvm_inject_exception(struct kvm_vcpu *vcpu) +{ + if (vcpu->arch.exception.error_code && !is_protmode(vcpu)) + vcpu->arch.exception.error_code = false; + kvm_x86_ops->queue_exception(vcpu); +} + static int inject_pending_event(struct kvm_vcpu *vcpu) { int r; @@ -7209,7 +7214,7 @@ static int inject_pending_event(struct kvm_vcpu *vcpu) /* try to reinject previous events if any */
if (vcpu->arch.exception.injected) - kvm_x86_ops->queue_exception(vcpu); + kvm_inject_exception(vcpu); /* * Do not inject an NMI or interrupt if there is a pending * exception. Exceptions and interrupts are recognized at @@ -7263,7 +7268,7 @@ static int inject_pending_event(struct kvm_vcpu *vcpu) kvm_update_dr7(vcpu); }
- kvm_x86_ops->queue_exception(vcpu); + kvm_inject_exception(vcpu); }
/* Don't consider new event if we re-injected an event */