Commit 7c8b465a authored by Jim Mattson's avatar Jim Mattson Committed by Sean Christopherson
Browse files

KVM: SVM: Mark VMCB_NPT as dirty on nested VMRUN 



Mark the VMCB_NPT bit as dirty in nested_vmcb02_prepare_save()
on every nested VMRUN.

If L1 changes the PAT MSR between two VMRUN instructions on the same
L1 vCPU, the g_pat field in the associated vmcb02 will change, and the
VMCB_NPT clean bit should be cleared.

Fixes: 4bb170a5 ("KVM: nSVM: do not mark all VMCB02 fields dirty on nested vmexit")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarJim Mattson <jmattson@google.com>
Link: https://lore.kernel.org/r/20250922162935.621409-3-jmattson@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 93c9e107

arch/x86/kvm/svm/nested.c

+1 −0
Original line number Diff line number Diff line
@@ -613,6 +613,7 @@ static void nested_vmcb02_prepare_save(struct vcpu_svm *svm, struct vmcb *vmcb12 
	struct kvm_vcpu *vcpu = &svm->vcpu;



	nested_vmcb02_compute_g_pat(svm);

	vmcb_mark_dirty(vmcb02, VMCB_NPT);



	/* Load the nested guest state */

	if (svm->nested.vmcb12_gpa != svm->nested.last_vmcb12_gpa) {