[PATCH v2 0/3] KVM: x86: Virtualize AMD CPUID faulting

[Jim Mattson]

AMD's "disable CPUID in usermode" feature is analogous to Intel's "CPUID
faulting" feature, but it is advertised and activated differently.  The AMD
feature is advertised via CPUID.80000021H:EAX.CpuidUserDis[bit 17] and
activated by setting HWCR.CpuidUserDis[bit 35].

Add virtualization support for the AMD feature.

v1 -> v2:
* Remove supports_cpuid_fault() instead of renaming it [Sean]

v1: https://lore.kernel.org/kvm/20260402223108.650572-1-jmattson@xxxxxxxxxx/

Jim Mattson (3):
  KVM: x86: Remove supports_cpuid_fault() helper
  KVM: x86: Virtualize AMD CPUID faulting
  KVM: selftests: Update hwcr_msr_test for CPUID faulting bit

 arch/x86/kvm/cpuid.c                          |  2 +-
 arch/x86/kvm/cpuid.h                          | 11 ++++------
 arch/x86/kvm/emulate.c                        | 14 +++++++------
 arch/x86/kvm/x86.c                            | 21 ++++++++++++-------
 .../testing/selftests/kvm/x86/hwcr_msr_test.c | 10 ++++-----
 5 files changed, 32 insertions(+), 26 deletions(-)


base-commit: 85f871f6ba46f20d7fbc0b016b4db648c33220dd
-- 
2.54.0.563.g4f69b47b94-goog