KVM: X86: Extend CPUID range to include new leaf (8765d753) · Commits · 戴 / test

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>

arch/x86/kvm/cpuid.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;

arch/x86/kvm/svm.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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);

		}
		}

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