From patchwork Wed Feb 7 16:06:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brijesh Singh X-Patchwork-Id: 10205509 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AD6A560247 for ; Wed, 7 Feb 2018 16:07:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9BEC529025 for ; Wed, 7 Feb 2018 16:07:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8EC8829035; Wed, 7 Feb 2018 16:07:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BFA262902B for ; Wed, 7 Feb 2018 16:07:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754590AbeBGQHQ (ORCPT ); Wed, 7 Feb 2018 11:07:16 -0500 Received: from mail-bl2nam02on0064.outbound.protection.outlook.com ([104.47.38.64]:53920 "EHLO NAM02-BL2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754436AbeBGQHK (ORCPT ); Wed, 7 Feb 2018 11:07:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amdcloud.onmicrosoft.com; s=selector1-amd-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=BoZC1mKblzMbTlpeOqzFC2GdaTBWM0oi0mlSS1gUbCk=; b=TGEkwWPGFandksb0FVwuEySkLidGO4KRVOwwTzjI0laBA3+uPIFdxyCFXTmrnm6Xq2vAIxninF2IMsC2bE8+0jfjyWF0cKXR396hiqATe2U+Fr0Qjz6LaibaxpYVMiLltr2pCfeZ6zL4/qw3kzjNIMSbHl2tg+KIP//zmUEVjBA= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=brijesh.singh@amd.com; Received: from wsp141597wss.amd.com (165.204.78.1) by CY1PR12MB0152.namprd12.prod.outlook.com (10.161.173.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.464.11; Wed, 7 Feb 2018 16:07:05 +0000 From: Brijesh Singh To: qemu-devel@nongnu.org Cc: Alistair Francis , Christian Borntraeger , Cornelia Huck , "Daniel P . Berrange" , "Dr. David Alan Gilbert" , "Michael S. Tsirkin" , "Edgar E. Iglesias" , Eduardo Habkost , Eric Blake , kvm@vger.kernel.org, Marcel Apfelbaum , Markus Armbruster , Paolo Bonzini , Peter Crosthwaite , Peter Maydell , Richard Henderson , Stefan Hajnoczi , Thomas Lendacky , Borislav Petkov , Brijesh Singh , Richard Henderson Subject: [PATCH v7 05/26] target/i386: add memory encryption feature cpuid support Date: Wed, 7 Feb 2018 10:06:17 -0600 Message-Id: <20180207160638.98872-5-brijesh.singh@amd.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180207160638.98872-1-brijesh.singh@amd.com> References: <20180207160638.98872-1-brijesh.singh@amd.com> MIME-Version: 1.0 X-Originating-IP: [165.204.78.1] X-ClientProxiedBy: DM3PR12CA0071.namprd12.prod.outlook.com (10.161.151.143) To CY1PR12MB0152.namprd12.prod.outlook.com (10.161.173.22) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 8558b75a-9f48-4aa3-49e2-08d56e44d57a X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(48565401081)(5600026)(4604075)(2017052603307)(7153060)(7193020); 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The feature is reported through CPUID 8000_001F[EAX]. Fn8000_001F [EAX]: Bit 0 Secure Memory Encryption (SME) supported Bit 1 Secure Encrypted Virtualization (SEV) supported Bit 2 Page flush MSR supported Bit 3 Ecrypted State (SEV-ES) support when memory encryption feature is reported, CPUID 8000_001F[EBX] should provide additional information regarding the feature (such as which page table bit is used to mark pages as encrypted etc). The information in EBX and ECX may vary from one family to another hence we use the host cpuid to populate the EBX information. The details for memory encryption CPUID is available in AMD APM (https://support.amd.com/TechDocs/24594.pdf) Section E.4.17 Cc: Paolo Bonzini Cc: Richard Henderson Cc: Eduardo Habkost Signed-off-by: Brijesh Singh --- target/i386/cpu.c | 36 ++++++++++++++++++++++++++++++++++++ target/i386/cpu.h | 6 ++++++ 2 files changed, 42 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index a49d2221adc9..4147eb6e18a9 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -234,6 +234,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1, #define TCG_EXT4_FEATURES 0 #define TCG_SVM_FEATURES 0 #define TCG_KVM_FEATURES 0 +#define TCG_MEM_ENCRYPT_FEATURES 0 #define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \ CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \ CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \ @@ -545,6 +546,20 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { .cpuid_reg = R_EDX, .tcg_features = ~0U, }, + [FEAT_MEM_ENCRYPT] = { + .feat_names = { + "sme", "sev", "page-flush-msr", "sev-es", + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + }, + .cpuid_eax = 0x8000001F, .cpuid_reg = R_EAX, + .tcg_features = TCG_MEM_ENCRYPT_FEATURES, + } }; typedef struct X86RegisterInfo32 { @@ -1965,6 +1980,9 @@ static X86CPUDefinition builtin_x86_defs[] = { CPUID_XSAVE_XGETBV1, .features[FEAT_6_EAX] = CPUID_6_EAX_ARAT, + /* Missing: SEV_ES */ + .features[FEAT_MEM_ENCRYPT] = + CPUID_8000_001F_EAX_SME | CPUID_8000_001F_EAX_SEV, .xlevel = 0x8000000A, .model_id = "AMD EPYC Processor", }, @@ -3589,6 +3607,19 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, *edx = 0; } break; + case 0x8000001F: + if (env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV) { + *eax = env->features[FEAT_MEM_ENCRYPT]; + host_cpuid(0x8000001F, 0, NULL, ebx, NULL, NULL); + *ecx = 0; + *edx = 0; + } else { + *eax = 0; + *ebx = 0; + *ecx = 0; + *edx = 0; + } + break; case 0xC0000000: *eax = env->cpuid_xlevel2; *ebx = 0; @@ -4036,10 +4067,15 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp) x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX); x86_cpu_adjust_feat_level(cpu, FEAT_SVM); x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE); + x86_cpu_adjust_feat_level(cpu, FEAT_MEM_ENCRYPT); /* SVM requires CPUID[0x8000000A] */ if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) { x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A); } + /* SEV requires CPUID[0x8000001F] */ + if ((env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV)) { + x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F); + } } /* Set cpuid_*level* based on cpuid_min_*level, if not explicitly set */ diff --git a/target/i386/cpu.h b/target/i386/cpu.h index f91e37d25dea..f7a0ab20fdd1 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -483,6 +483,7 @@ typedef enum FeatureWord { FEAT_6_EAX, /* CPUID[6].EAX */ FEAT_XSAVE_COMP_LO, /* CPUID[EAX=0xd,ECX=0].EAX */ FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */ + FEAT_MEM_ENCRYPT, /* CPUID[8000_001F].EAX */ FEATURE_WORDS, } FeatureWord; @@ -679,6 +680,11 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_6_EAX_ARAT (1U << 2) +#define CPUID_8000_001F_EAX_SME (1U << 0) /* SME */ +#define CPUID_8000_001F_EAX_SEV (1U << 1) /* SEV */ +#define CPUID_8000_001F_EAX_PAGE_FLUSH_MSR (1U << 2) /* Page flush MSR */ +#define CPUID_8000_001F_EAX_SEV_ES (1U << 3) /* SEV-ES */ + /* CPUID[0x80000007].EDX flags: */ #define CPUID_APM_INVTSC (1U << 8)