From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brijesh Singh Subject: [RFC Part2 PATCH v3 08/26] KVM: X86: Extend CPUID range to include new leaf Date: Mon, 24 Jul 2017 15:02:45 -0500 Message-ID: <20170724200303.12197-9-brijesh.singh@amd.com> References: <20170724200303.12197-1-brijesh.singh@amd.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Thomas Gleixner , Borislav Petkov , Joerg Roedel , "Michael S . Tsirkin" , Paolo Bonzini , =?UTF-8?q?=5C=22Radim=20Kr=C4=8Dm=C3=A1=C5=99=5C=22?= , Tom Lendacky , Brijesh Singh To: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org Return-path: Received: from mail-dm3nam03on0066.outbound.protection.outlook.com ([104.47.41.66]:3232 "EHLO NAM03-DM3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753073AbdGXUEP (ORCPT ); Mon, 24 Jul 2017 16:04:15 -0400 In-Reply-To: <20170724200303.12197-1-brijesh.singh@amd.com> Sender: kvm-owner@vger.kernel.org List-ID: This CPUID provides the memory encryption support information on AMD Platform. The complete description for CPUID leaf is available in APM volume 2, Section 15.34 Signed-off-by: Brijesh Singh --- arch/x86/kvm/cpuid.c | 2 +- arch/x86/kvm/svm.c | 6 ++++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 59ca2ee..372e969 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -599,7 +599,7 @@ 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; diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 1cd7c78..256c9df 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5131,6 +5131,12 @@ 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); + } } -- 2.9.4