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KVM: X86: Extend CPUID range to include new leaf

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This CPUID leaf provides the memory encryption support information on
AMD Platform. Its complete description is available in APM volume 2,
Section 15.34

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: x86@kernel.org
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
This commit is contained in:
Brijesh Singh 2017-12-04 10:57:25 -06:00
parent 4faefff324
commit 8765d75329
2 changed files with 7 additions and 1 deletions
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2
arch/x86/kvm/cpuid.c
View File

@ -604,7 +604,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
entry->edx = 0;
break;
case 0x80000000:
entry->eax = min(entry->eax, 0x8000001a);
entry->eax = min(entry->eax, 0x8000001f);
break;
case 0x80000001:
entry->edx &= kvm_cpuid_8000_0001_edx_x86_features;

6
arch/x86/kvm/svm.c
View File

@ -5170,6 +5170,12 @@ static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
entry->edx |= SVM_FEATURE_NPT;
break;
case 0x8000001F:
/* Support memory encryption cpuid if host supports it */
if (boot_cpu_has(X86_FEATURE_SEV))
cpuid(0x8000001f, &entry->eax, &entry->ebx,
&entry->ecx, &entry->edx);
}
}