tree 47d1a8868b92411e5a065c83054932bb4ab3bbd7
parent 7c8a4742c4abe205ec9daf416c9d42fd6b406e8e
author David Matlack <dmatlack@google.com> 1642116618 +0000
committer Paolo Bonzini <pbonzini@redhat.com> 1642612005 -0500

KVM: x86/mmu: Clear MMU-writable during changed_pte notifier

When handling the changed_pte notifier and the new PTE is read-only,
clear both the Host-writable and MMU-writable bits in the SPTE. This
preserves the invariant that MMU-writable is set if-and-only-if
Host-writable is set.

No functional change intended. Nothing currently relies on the
aforementioned invariant and technically the changed_pte notifier is
dead code.

Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220113233020.3986005-3-dmatlack@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>