[kvm-unit-tests PATCH 0/3] x86/msr: Add SPEC_CTRL coverage

[Sean Christopherson <seanjc@google.com>]

Add test coverage for SPEC_CTRL, which detects the bug pointed by Chao[1]
when running on hosts with V_SPEC_CTRL.

Note, this applies on top of the X86_FEATURE_XXX cleanup[2].

[1] https://lore.kernel.org/all/aEE4BEHAHdhNTGoG@intel.com
[2] https://lore.kernel.org/all/20250529221929.3807680-1-seanjc@google.com

Sean Christopherson (3):
  x86/msr: Treat PRED_CMD as support if CPU has SBPB
  x86/msr: Add a testcase to verify SPEC_CTRL exists (or not) as
    expected
  x86/msr: Add an "msr64" test configuration to validate negative cases

 lib/x86/msr.h       |  8 ++++++--
 lib/x86/processor.h | 10 ++++++++--
 x86/msr.c           | 34 +++++++++++++++++++++++++++++++---
 x86/unittests.cfg   |  7 +++++++
 4 files changed, 52 insertions(+), 7 deletions(-)


base-commit: a93196db8339df0c09d900f9a465820a9d932c1b
-- 
2.50.0.rc0.604.gd4ff7b7c86-goog