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David Alan Gilbert" , , , , Brijesh Singh Subject: [PATCH v8 16/40] KVM: SVM: Define sev_features and vmpl field in the VMSA Date: Fri, 10 Dec 2021 09:43:08 -0600 Message-ID: <20211210154332.11526-17-brijesh.singh@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211210154332.11526-1-brijesh.singh@amd.com> References: <20211210154332.11526-1-brijesh.singh@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB03.amd.com (10.181.40.144) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1a421310-b961-4089-fb64-08d9bbf3ec2d X-MS-TrafficTypeDiagnostic: CY4PR12MB1510:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6790; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(46966006)(36840700001)(40470700001)(508600001)(5660300002)(2616005)(82310400004)(40460700001)(44832011)(36860700001)(336012)(7406005)(26005)(186003)(86362001)(1076003)(7696005)(7416002)(81166007)(316002)(356005)(16526019)(110136005)(8676002)(83380400001)(54906003)(6666004)(70206006)(70586007)(426003)(36756003)(4326008)(47076005)(2906002)(8936002)(2101003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Dec 2021 15:44:16.3050 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1a421310-b961-4089-fb64-08d9bbf3ec2d X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT067.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR12MB1510 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 4A48518000A X-Stat-Signature: 8c1n6hmjobe3x5pyq4zha5n965zsajuf Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=amd.com header.s=selector1 header.b=oLWGxv+x; spf=pass (imf06.hostedemail.com: domain of brijesh.singh@amd.com designates 40.107.94.76 as permitted sender) smtp.mailfrom=brijesh.singh@amd.com; dmarc=pass (policy=quarantine) header.from=amd.com X-HE-Tag: 1639151058-905782 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The hypervisor uses the sev_features field (offset 3B0h) in the Save State Area to control the SEV-SNP guest features such as SNPActive, vTOM, ReflectVC etc. An SEV-SNP guest can read the SEV_FEATURES fields through the SEV_STATUS MSR. While at it, update the dump_vmcb() to log the VMPL level. See APM2 Table 15-34 and B-4 for more details. Signed-off-by: Brijesh Singh Reviewed-by: Venu Busireddy --- arch/x86/include/asm/svm.h | 6 ++++-- arch/x86/kvm/svm/svm.c | 4 ++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index d3277486a6c0..c3fad5172584 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -238,7 +238,8 @@ struct vmcb_save_area { struct vmcb_seg ldtr; struct vmcb_seg idtr; struct vmcb_seg tr; - u8 reserved_1[43]; + u8 reserved_1[42]; + u8 vmpl; u8 cpl; u8 reserved_2[4]; u64 efer; @@ -303,7 +304,8 @@ struct vmcb_save_area { u64 sw_exit_info_1; u64 sw_exit_info_2; u64 sw_scratch; - u8 reserved_11[56]; + u64 sev_features; + u8 reserved_11[48]; u64 xcr0; u8 valid_bitmap[16]; u64 x87_state_gpa; diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 65707bee208d..d3a6356fa1af 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3290,8 +3290,8 @@ static void dump_vmcb(struct kvm_vcpu *vcpu) "tr:", save01->tr.selector, save01->tr.attrib, save01->tr.limit, save01->tr.base); - pr_err("cpl: %d efer: %016llx\n", - save->cpl, save->efer); + pr_err("vmpl: %d cpl: %d efer: %016llx\n", + save->vmpl, save->cpl, save->efer); pr_err("%-15s %016llx %-13s %016llx\n", "cr0:", save->cr0, "cr2:", save->cr2); pr_err("%-15s %016llx %-13s %016llx\n",