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dkim=none (message not signed) header.d=none;edk2.groups.io; dmarc=none action=none header.from=amd.com; Received: from DM5PR12MB1355.namprd12.prod.outlook.com (2603:10b6:3:6e::7) by DM5PR12MB2504.namprd12.prod.outlook.com (2603:10b6:4:b5::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3000.20; Tue, 19 May 2020 21:52:34 +0000 Received: from DM5PR12MB1355.namprd12.prod.outlook.com ([fe80::4ce1:9947:9681:c8b1]) by DM5PR12MB1355.namprd12.prod.outlook.com ([fe80::4ce1:9947:9681:c8b1%10]) with mapi id 15.20.3000.034; Tue, 19 May 2020 21:52:33 +0000 From: "Lendacky, Thomas" To: devel@edk2.groups.io Cc: Jordan Justen , Laszlo Ersek , Ard Biesheuvel , Michael D Kinney , Liming Gao , Eric Dong , Ray Ni , Brijesh Singh Subject: [PATCH v8 38/46] OvmfPkg/Sec: Enable cache early to speed up booting Date: Tue, 19 May 2020 16:51:06 -0500 Message-Id: <3089d2e23db33e4a33b1e91469c2163e16569afd.1589925074.git.thomas.lendacky@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: X-ClientProxiedBy: DM6PR11CA0048.namprd11.prod.outlook.com (2603:10b6:5:14c::25) To DM5PR12MB1355.namprd12.prod.outlook.com (2603:10b6:3:6e::7) Return-Path: thomas.lendacky@amd.com MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from tlendack-t1.amd.com (165.204.77.1) by DM6PR11CA0048.namprd11.prod.outlook.com (2603:10b6:5:14c::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3000.25 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 6tHWy0OIxsqgNuKT6b37Hopp12F4LfeO252+4sB9rjWpdchy6i5fdEAeqMJ2KCjp9081jYibO6Kf+139UwxXwPbHlQ84GbEEd6JnDlVSh7Ck6+OuESYhyWKwt1O3QZrDAfT3JTaKYkv2S0sn5RNL5LtKes57q3iCC7FgUZiUj8K814GJ3YfhFhyVbFjI5yhAsGZklrA/luNKgSJRva2K/XeZ853+Tsoltojp14hbWpKFFxvPoe3mzvp7ClJ0rx8XQX2+ATmzT+xsJo5i6fNrKnqx6YgZb1pu+goO/um7CL1b5fCUZQYZM64ohupoynp8dEY0GBZCGnKtmSoH7Xu0TqAf9puiLOC9C+Dp2le9vJPmmXwa0BDhutZySGrMyOj+Oy/eYn/BoPcWBiYQIhnEu+m1ExKWeMVk0kGb5iFoOgdXjGcSj+6vsHjaNhxkBBUGEVxllo989J1+HB/XNJ0B73dzlPlIBPX7V1TkRCap4Iw= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: c5017989-8071-48d2-5a78-08d7fc3edf82 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 May 2020 21:52:06.5757 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: d0ieic610wDFdFumrbQRa/7TnX+hXx5AucjHNTRiMisH3V/kWGmMFDkp6dxMGtRJ73z4eREgtazj0oM0xgh3mQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB2504 Content-Type: text/plain BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198 Currently, the OVMF code relies on the hypervisor to enable the cache support on the processor in order to improve the boot speed. However, with SEV-ES, the hypervisor is not allowed to change the CR0 register to enable caching. Update the OVMF Sec support to enable caching in order to improve the boot speed when running as an SEV-ES guest. Cc: Jordan Justen Cc: Laszlo Ersek Cc: Ard Biesheuvel Reviewed-by: Laszlo Ersek Signed-off-by: Tom Lendacky --- OvmfPkg/Sec/SecMain.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/OvmfPkg/Sec/SecMain.c b/OvmfPkg/Sec/SecMain.c index c2a35463dce4..271a06348ed8 100644 --- a/OvmfPkg/Sec/SecMain.c +++ b/OvmfPkg/Sec/SecMain.c @@ -905,6 +905,13 @@ SecCoreStartupWithStack ( // For non SEV-ES guests, just load the IDTR. // AsmWriteIdtr (&IdtDescriptor); + } else { + // + // Under SEV-ES, the hypervisor can't modify CR0 and so can't enable + // caching in order to speed up the boot. Enable caching early for + // an SEV-ES guest. + // + AsmEnableCache (); } DEBUG ((DEBUG_INFO, -- 2.17.1