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Peter Anvin" , , CC: Subject: [PATCH 1/1] x86/kvm/svm: Implement support for PSFD Date: Wed, 7 Apr 2021 14:45:12 -0500 Message-ID: <20210407194512.6922-1-rsaripal@amd.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1c038c28-8220-4d00-2687-08d8f9fdbba9 X-MS-TrafficTypeDiagnostic: BYAPR12MB2695: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:431; X-MS-Exchange-SenderADCheck: 1 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:NLI;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(39860400002)(136003)(396003)(376002)(346002)(36840700001)(46966006)(47076005)(81166007)(426003)(336012)(356005)(5660300002)(36756003)(2906002)(82310400003)(36860700001)(7696005)(921005)(8676002)(4326008)(478600001)(70586007)(8936002)(316002)(70206006)(16526019)(110136005)(186003)(26005)(6666004)(2616005)(82740400003)(7416002)(83380400001)(1076003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Apr 2021 19:45:44.2942 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1c038c28-8220-4d00-2687-08d8f9fdbba9 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT045.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR12MB2695 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Ramakrishna Saripalli Expose Predictive Store Forwarding capability to guests. Guests enable or disable PSF via SPEC_CTRL MSR. Signed-off-by: Ramakrishna Saripalli --- arch/x86/kvm/cpuid.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 6bd2f8b830e4..9c4af0fef6d7 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -448,6 +448,8 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_set(X86_FEATURE_INTEL_STIBP); if (boot_cpu_has(X86_FEATURE_AMD_SSBD)) kvm_cpu_cap_set(X86_FEATURE_SPEC_CTRL_SSBD); + if (boot_cpu_has(X86_FEATURE_AMD_PSFD)) + kvm_cpu_cap_set(X86_FEATURE_AMD_PSFD); kvm_cpu_cap_mask(CPUID_7_1_EAX, F(AVX_VNNI) | F(AVX512_BF16) @@ -482,7 +484,7 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_mask(CPUID_8000_0008_EBX, F(CLZERO) | F(XSAVEERPTR) | F(WBNOINVD) | F(AMD_IBPB) | F(AMD_IBRS) | F(AMD_SSBD) | F(VIRT_SSBD) | - F(AMD_SSB_NO) | F(AMD_STIBP) | F(AMD_STIBP_ALWAYS_ON) + F(AMD_SSB_NO) | F(AMD_STIBP) | F(AMD_STIBP_ALWAYS_ON) | F(AMD_PSFD) ); /* -- 2.25.1