[kvm-unit-tests PATCH 0/2] x86/svm: Add testing for L1 intercept bug

[Kevin Cheng <chengkev@google.com>]

If a feature is not advertised to L1, L1 intercepts for instructions
controlled by this feature should be ignored. Currently, the added test
fails due to a bug in nested vm exit handling where vmcb12 intercepts
are checked before vmcb02 intercepts, causing the #UD exception to never
be injected into L2 if the L1 intercept is set. This is fixed in [0]

The first patch just adds the missing intercepts needed for testing and
restructures the vmcb_control_area struct to make adding the missing
intercepts less ugly. The second patch adds the test which disables all
relevant features that have available instruction intercepts, and checks
that the #UD exception is correctly delivered despite the L1 intercept
being set.

[0] https://lore.kernel.org/all/20251205070630.4013452-1-chengkev@google.com/

Kevin Cheng (2):
  x86/svm: Add missing svm intercepts
  x86/svm: Add unsupported instruction intercept test

 x86/svm.c         |   6 +-
 x86/svm.h         |  87 ++++++++++++++++++---
 x86/svm_tests.c   | 188 ++++++++++++++++++++++++++++++++--------------
 x86/unittests.cfg |   9 ++-
 4 files changed, 220 insertions(+), 70 deletions(-)

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2.52.0.223.gf5cc29aaa4-goog