[PATCH v2 1/8] KVM: SVM: Explicitly mark vmcb01 dirty after modifying VMCB intercepts

[Sean Christopherson]

When reacting to an intercept update, explicitly mark vmcb01's intercepts
dirty, as KVM always initially operates on vmcb01, and nested_svm_vmexit()
isn't guaranteed to mark VMCB_INTERCEPTS as dirty.  I.e. if L2 is active,
KVM will modify the intercepts for L1, but might not mark them as dirty
before the next VMRUN of L1.

Fixes: 116a0a23676e ("KVM: SVM: Add clean-bit for intercetps, tsc-offset and pause filter count")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
 arch/x86/kvm/svm/nested.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index de90b104a0dd..66701106a51b 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -128,11 +128,13 @@ void recalc_intercepts(struct vcpu_svm *svm)
 	struct vmcb_ctrl_area_cached *g;
 	unsigned int i;
 
-	vmcb_mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
+	vmcb_mark_dirty(svm->vmcb01.ptr, VMCB_INTERCEPTS);
 
 	if (!is_guest_mode(&svm->vcpu))
 		return;
 
+	vmcb_mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
+
 	c = &svm->vmcb->control;
 	h = &svm->vmcb01.ptr->control;
 	g = &svm->nested.ctl;
-- 
2.53.0.345.g96ddfc5eaa-goog