redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

KVM: X86: Extend CPUID range to include new leaf 

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>
hifive-unleashed-5.1
Brijesh Singh 2017-12-04 10:57:25 -06:00
parent 4faefff324
commit 8765d75329
2 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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);
}
}