From: Brijesh Singh <brijesh.singh@amd.com>
Date: Mon, 4 Dec 2017 10:57:25 -0600
Subject: KVM: X86: Extend CPUID range to include new leaf
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Git-commit: 8765d75329a386dd7742f94a1ea5fdcdea8d93d0
Patch-mainline: v4.16-rc1
References: bsc#1063068
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>
Acked-by: Borislav Petkov <bp@suse.de>
---
arch/x86/kvm/cpuid.c | 2 +-
arch/x86/kvm/svm.c | 6 ++++++
2 files changed, 7 insertions(+), 1 deletion(-)
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -604,7 +604,7 @@ static inline int __do_cpuid_ent(struct
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;
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5189,6 +5189,12 @@ static void svm_set_supported_cpuid(u32
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);
+
}
}