[RFC PATCH 11/19] KVM: SVM/SEV: Do not intercept exceptions for Secure AVIC guest

[Neeraj Upadhyay]

Exceptions cannot be explicitly injected from Hypervisor to Secure
AVIC guests. So, clear exceptions intercepts so that all exceptions
are routed directly to such guests.

Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@xxxxxxx>
---
 arch/x86/kvm/svm/sev.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index d8413c7f4832..5106afc40cc8 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -4786,8 +4786,17 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm)
 	set_msr_interception(vcpu, svm->msrpm, MSR_EFER, 1, 1);
 	set_msr_interception(vcpu, svm->msrpm, MSR_IA32_CR_PAT, 1, 1);
 
-	if (sev_savic_active(vcpu->kvm))
+	if (sev_savic_active(vcpu->kvm)) {
 		set_msr_interception(vcpu, svm->msrpm, MSR_AMD64_SECURE_AVIC_CONTROL, 1, 1);
+
+		/* Clear all exception intercepts. */
+		clr_exception_intercept(svm, PF_VECTOR);
+		clr_exception_intercept(svm, UD_VECTOR);
+		clr_exception_intercept(svm, MC_VECTOR);
+		clr_exception_intercept(svm, AC_VECTOR);
+		clr_exception_intercept(svm, DB_VECTOR);
+		clr_exception_intercept(svm, GP_VECTOR);
+	}
 }
 
 void sev_init_vmcb(struct vcpu_svm *svm)
-- 
2.34.1