[PATCH v2 0/2] KVM: nSVM: Handle L2 clearing EFER.SVME properly

[Yosry Ahmed <yosry.ahmed@linux.dev>]

Add more graceful handling of L2 clearing EFER.SVME without L1
interception, which is architecturally undefined. Shutdown L1 instead of
running it with corrupted L2 state, and add a test to verify the new
behavior.

I did not CC stable on patch 1 because it's not technically a KVM bug,
but it would be nice to have it backported. Leaving the decision to
Sean.

Yosry Ahmed (2):
  KVM: SVM: Triple fault L1 on unintercepted EFER.SVME clear by L2
  KVM: selftests: Add a test for L2 clearing EFER.SVME without intercept

 arch/x86/kvm/svm/svm.c                        | 11 ++++
 tools/testing/selftests/kvm/Makefile.kvm      |  1 +
 .../kvm/x86/svm_nested_clear_efer_svme.c      | 55 +++++++++++++++++++
 3 files changed, 67 insertions(+)
 create mode 100644 tools/testing/selftests/kvm/x86/svm_nested_clear_efer_svme.c


base-commit: e944fe2c09f405a2e2d147145c9b470084bc4c9a
-- 
2.53.0.rc2.204.g2597b5adb4-goog