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Message-Id: <20221117143242.102721-13-mlevitsk@redhat.com>
Date: Thu, 17 Nov 2022 16:32:41 +0200
From: Maxim Levitsky <mlevitsk@...hat.com>
To: kvm@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
linux-kernel@...r.kernel.org,
Peter Zijlstra <peterz@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>,
Sandipan Das <sandipan.das@....com>,
Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
Jing Liu <jing2.liu@...el.com>,
Josh Poimboeuf <jpoimboe@...nel.org>,
Wyes Karny <wyes.karny@....com>,
Borislav Petkov <bp@...en8.de>,
Babu Moger <babu.moger@....com>,
Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
Sean Christopherson <seanjc@...gle.com>,
Jim Mattson <jmattson@...gle.com>, x86@...nel.org,
Maxim Levitsky <mlevitsk@...hat.com>,
Santosh Shukla <santosh.shukla@....com>
Subject: [PATCH 12/13] KVM: nSVM: emulate VMEXIT_INVALID case for nested VNMI
From: Santosh Shukla <santosh.shukla@....com>
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@....com>
Reviewed-by: Maxim Levitsky <mlevitsk@...hat.com>
---
arch/x86/kvm/svm/nested.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index c9fcdd691bb5a1..3ef7e1971a4709 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -275,6 +275,11 @@ 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;
}
--
2.34.3
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