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[PATCHv4,7/8] KVM: nSVM: emulate VMEXIT_INVALID case for nested VNMI

Message ID 20220829100850.1474-8-santosh.shukla@amd.com (mailing list archive)
State New, archived
Headers show
Series Virtual NMI feature | expand

Commit Message

Shukla, Santosh Aug. 29, 2022, 10:08 a.m. UTC 
If NMI virtualization enabled and NMI_INTERCEPT is unset then next vm
entry will exit with #INVALID exit reason.

In order to emulate above (VMEXIT(#INVALID)) scenario for nested
environment, extending check for V_NMI_ENABLE, NMI_INTERCEPT bit in func
__nested_vmcb_check_controls.

Signed-off-by: Santosh Shukla <santosh.shukla@amd.com>
---
 arch/x86/kvm/svm/nested.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 3d986ec83147..9d031fadcd67 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -296,6 +296,11 @@  static bool __nested_vmcb_check_controls(struct kvm_vcpu *vcpu,
 	if (CC(!nested_svm_check_tlb_ctl(vcpu, control->tlb_ctl)))
 		return false;
 
+	if (CC((control->int_ctl & V_NMI_ENABLE) &&
+		!vmcb12_is_intercept(control, INTERCEPT_NMI))) {
+		return false;
+	}
+
 	return true;
 }