diff options
| author | Aaron Lewis <aaronlewis@google.com> | 2023-04-04 17:45:20 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-04-11 10:19:04 -0700 |
| commit | 03a405b7a522700a654b79903312d0a305bdce0d (patch) | |
| tree | d6a0674e82ca4c025eee173e478c589c9623a8d3 /arch/x86/kvm/cpuid.c | |
| parent | 28f2302584af8ed60e2108bf40762a5c40ecb372 (diff) | |
| download | linux-stable-03a405b7a522700a654b79903312d0a305bdce0d.tar.gz linux-stable-03a405b7a522700a654b79903312d0a305bdce0d.tar.bz2 linux-stable-03a405b7a522700a654b79903312d0a305bdce0d.zip | |
KVM: selftests: Add test to verify KVM's supported XCR0
Check both architectural rules and KVM's ABI for KVM_GET_SUPPORTED_CPUID
to ensure the supported xfeatures[1] don't violate any of them.
The architectural rules[2] and KVM's contract with userspace ensure for a
given feature, e.g. sse, avx, amx, etc... their associated xfeatures are
either all sets or none of them are set, and any dependencies are enabled
if needed.
[1] EDX:EAX of CPUID.(EAX=0DH,ECX=0)
[2] SDM vol 1, 13.3 ENABLING THE XSAVE FEATURE SET AND XSAVE-ENABLED
FEATURES
Cc: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Aaron Lewis <aaronlewis@google.com>
[sean: expand comments, use a fancy X86_PROPERTY]
Reviewed-by: Aaron Lewis <aaronlewis@google.com>
Tested-by: Aaron Lewis <aaronlewis@google.com>
Link: https://lore.kernel.org/r/20230405004520.421768-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
0 files changed, 0 insertions, 0 deletions