KVM: nSVM: mark vmcb as dirty when forcingly leaving the guest mode

Maxim Levitsky · bonzini · commit 56fe28de8c4f · 2021-01-07T18:11:34.000-05:00
We overwrite most of vmcb fields while doing so, so we must
mark it as dirty.

Signed-off-by: Maxim Levitsky &lt;mlevitsk@redhat.com&gt;
Message-Id: &lt;20210107093854.882483-5-mlevitsk@redhat.com&gt;
Signed-off-by: Paolo Bonzini &lt;pbonzini@redhat.com&gt;
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
@@ -754,6 +754,7 @@ void svm_leave_nested(struct vcpu_svm *svm)
 		leave_guest_mode(&svm->vcpu);
 		copy_vmcb_control_area(&vmcb->control, &hsave->control);
 		nested_svm_uninit_mmu_context(&svm->vcpu);
+		vmcb_mark_all_dirty(svm->vmcb);
 	}
 
 	kvm_clear_request(KVM_REQ_GET_NESTED_STATE_PAGES, &svm->vcpu);

Original file line number	Diff line number	Diff line change
`@@ -754,6 +754,7 @@ void svm_leave_nested(struct vcpu_svm *svm)`
`754`	`754`	`leave_guest_mode(&svm->vcpu);`
`755`	`755`	`copy_vmcb_control_area(&vmcb->control, &hsave->control);`
`756`	`756`	`nested_svm_uninit_mmu_context(&svm->vcpu);`
	`757`	`+ vmcb_mark_all_dirty(svm->vmcb);`
`757`	`758`	`}`
`758`	`759`
`759`	`760`	`kvm_clear_request(KVM_REQ_GET_NESTED_STATE_PAGES, &svm->vcpu);`