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| author | Sean Christopherson <seanjc@google.com> | 2021-01-22 21:40:46 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-01-28 17:41:24 +0100 |
| commit | fb35d30fe5b06cc24444f0405da8fbe0be5330d1 (patch) | |
| tree | 1f257d2806bd8f77a72a1a9819268206986b3954 /arch/x86/kernel/cpu/common.c | |
| parent | Linux 5.11-rc3 (diff) | |
| download | linux-fb35d30fe5b06cc24444f0405da8fbe0be5330d1.tar.xz linux-fb35d30fe5b06cc24444f0405da8fbe0be5330d1.zip | |
x86/cpufeatures: Assign dedicated feature word for CPUID_0x8000001F[EAX]
Collect the scattered SME/SEV related feature flags into a dedicated
word. There are now five recognized features in CPUID.0x8000001F.EAX,
with at least one more on the horizon (SEV-SNP). Using a dedicated word
allows KVM to use its automagic CPUID adjustment logic when reporting
the set of supported features to userspace.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Link: https://lkml.kernel.org/r/20210122204047.2860075-2-seanjc@google.com
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 35ad8480c464..9215b91bc044 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -960,6 +960,9 @@ void get_cpu_cap(struct cpuinfo_x86 *c) if (c->extended_cpuid_level >= 0x8000000a) c->x86_capability[CPUID_8000_000A_EDX] = cpuid_edx(0x8000000a); + if (c->extended_cpuid_level >= 0x8000001f) + c->x86_capability[CPUID_8000_001F_EAX] = cpuid_eax(0x8000001f); + init_scattered_cpuid_features(c); init_speculation_control(c); |