[3/4] KVM: SVM: Add a comment to clarify what vcpu_svm.vmcb points at
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Message ID 20210406171811.4043363-4-seanjc@google.com
State Accepted
Commit 554cf31474937f0a78045aaa7df565ffb6a29c43
Headers show
  • KVM: SVM: A fix and cleanups for vmcb tracking
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Commit Message

Sean Christopherson April 6, 2021, 5:18 p.m. UTC
Add a comment above the declaration of vcpu_svm.vmcb to call out that it
is simply a shorthand for current_vmcb->ptr.  The myriad accesses to
svm->vmcb are quite confusing without this crucial detail.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
 arch/x86/kvm/svm/svm.h | 1 +
 1 file changed, 1 insertion(+)

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diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 2173fe985104..b230950c1aa6 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -111,6 +111,7 @@  struct svm_nested_state {
 struct vcpu_svm {
 	struct kvm_vcpu vcpu;
+	/* vmcb always points at current_vmcb->ptr, it's purely a shorthand. */
 	struct vmcb *vmcb;
 	struct kvm_vmcb_info vmcb01;
 	struct kvm_vmcb_info *current_vmcb;