From nobody Fri Dec 19 20:55:26 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.12 as permitted sender) smtp.mailfrom=bounce+27952+57849+1787277+3901457@groups.io; arc=fail (BodyHash is different from the expected one) Received: from web01.groups.io (web01.groups.io [66.175.222.12]) by mx.zohomail.com with SMTPS id 1587577357232680.4576146217266; Wed, 22 Apr 2020 10:42:37 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id QMz8YY1788612xEwj5UW5hJY; Wed, 22 Apr 2020 10:42:36 -0700 X-Received: from NAM10-MW2-obe.outbound.protection.outlook.com (NAM10-MW2-obe.outbound.protection.outlook.com []) by mx.groups.io with SMTP id smtpd.web12.481.1587577354031961659 for ; Wed, 22 Apr 2020 10:42:35 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ADcuN18pkVS09geoVm/XGjdUYwK9dVXydUpMbhOiUF6tDhPqm+gILRlW/+U/IdZbFuhyOOiG7zdyWUTW6JoaR2WOTesugRCV8FM8Wc76xw5uU7Z1vK0+SkeDsvjYrSg8DM/IoTJG4q65KdS9d4JsAjj+jOs+4wKGV3vazY1kexaq6Mhztc0AehxNKJmb/eGJ8LjqrW3DY4matwFx3IHN5tpxIQux3sTQwv1leq2z0uU498tcWnITGvpGcHVVFXrA2H1B5q2dPEl9cmG3iEN/9MXjJN0Dsv0inTw7Dfvplf6mHZv94dRFXnreI+8lnaJb6Ww3QdPr9BbURGsIfg2/qA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=cVEPk4hpmHk7iKnc7mwTo9qrS4p9jxOov4mT6u8ADU4=; b=ENiRVHudD1Uw4mVdzFZZN9b4q4Cs7rDcU2oV01ZoiH9gXTKM9+1kZ27ErmVAOQFMXlIte7MLnRZC5z6M798/InoxRsdIgzEV/nPFAm8S1C/7iwnwQebt1o5zt9iPAd/NMNI8wsdhVqmy+VMCvsd+8wn/j5wiob4SGgHi2T6bBEMWCyEnVgKU2dcEtDD8UCLp3FKsIhrEV7mPP75eDLHK/3bu2+YYANWWTpOfOT05mgyLZG/z7SunNxtrWfjUkwtQx/IUHox3Ozj7CqeBblsZvVSWoNooFf86xrsXhlT9Eiure9vbDGH2l0cFY49/4e+qPcP03GDMMu95kC8WosRA3w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none X-Received: from DM6PR12MB3163.namprd12.prod.outlook.com (2603:10b6:5:15e::26) by DM6PR12MB4580.namprd12.prod.outlook.com (2603:10b6:5:2a8::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2921.29; Wed, 22 Apr 2020 17:42:34 +0000 X-Received: from DM6PR12MB3163.namprd12.prod.outlook.com ([fe80::9ae:cb95:c925:d5bf]) by DM6PR12MB3163.namprd12.prod.outlook.com ([fe80::9ae:cb95:c925:d5bf%4]) with mapi id 15.20.2921.030; Wed, 22 Apr 2020 17:42:34 +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: [edk2-devel] [PATCH v7 18/43] UefiCpuPkg/CpuExceptionHandler: Add support for RDTSC NAE events Date: Wed, 22 Apr 2020 12:41:33 -0500 Message-Id: In-Reply-To: References: X-ClientProxiedBy: DM5PR04CA0060.namprd04.prod.outlook.com (2603:10b6:3:ef::22) To DM6PR12MB3163.namprd12.prod.outlook.com (2603:10b6:5:15e::26) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-Received: from tlendack-t1.amd.com (165.204.77.1) by DM5PR04CA0060.namprd04.prod.outlook.com (2603:10b6:3:ef::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2937.13 via Frontend Transport; Wed, 22 Apr 2020 17:42:33 +0000 X-Originating-IP: [165.204.77.1] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: ce9c1c3e-9b73-41d7-ebd7-08d7e6e48a21 X-MS-TrafficTypeDiagnostic: DM6PR12MB4580:|DM6PR12MB4580: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6430; Received-SPF: pass (zohomail.com: domain of groups.io designates 66.175.222.12 as permitted sender) client-ip=66.175.222.12; envelope-from=bounce+27952+57849+1787277+3901457@groups.io; helo=web01.groups.io; Received-SPF: None (protection.outlook.com: amd.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: sOtmSRl/l+lsuIcChft/opp75Sfw/+fx6y4N9+LySv3hyJSQrnI3iiJvhJGzPMKWkUTDNV0schhn3Q2ZbFcHiHkVB+lOzkpTY7mqVfhMMFSQzV0ECgMDU5u8UZ3Ob377ze4uKcc5ukE4Y+F9RdMmFw== X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: ce9c1c3e-9b73-41d7-ebd7-08d7e6e48a21 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Apr 2020 17:42:34.3533 (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: zIJdqMKWH+HfBTdd1WxlYvC3mo0r3XW84jdRQfuXWBYCasHt47QXZIRYxhApYrtVOCfLOE4yq+9NgYeeYqnNNw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4580 Precedence: Bulk List-Unsubscribe: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,thomas.lendacky@amd.com X-Gm-Message-State: H4zcfE5phzibL15lu6urOGiPx1787277AA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1587577356; bh=P3ef6MnaREmWWBFz+b9/os34oxxBF7vXD+VRW3z9DT0=; h=Cc:Content-Type:Date:From:Reply-To:Subject:To; b=LZ9Rp/Dy05S73rPqPTXoktcsm+cIvrxBr+PnUOFQZ9ekxKIYDQWk52iIKUnOTb4C/z2 d24nQlHz+YjCPcgmg8jpFiQKLqkEmWnDowicV8yMXA2K1lH1SEPz4VUFolQLsQT8iJFwN gby1PQJJGQQLdbnI3cAE07rdovn8Pl1thDY= X-ZohoMail-DKIM: pass (identity @groups.io) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3D2198 Under SEV-ES, a RDTSC intercept generates a #VC exception. VMGEXIT must be used to allow the hypervisor to handle this intercept. Cc: Eric Dong Cc: Ray Ni Cc: Laszlo Ersek Signed-off-by: Tom Lendacky --- .../X64/ArchAMDSevVcHandler.c | 43 +++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHand= ler.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c index 29e88147aab3..edd868c584a6 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c @@ -1207,6 +1207,45 @@ CpuidExit ( return 0; } =20 +/** + Handle a RDTSC event. + + Use the VMGEXIT instruction to handle a RDTSC event. + + @param[in, out] Ghcb Pointer to the Guest-Hypervisor Communi= cation + Block + @param[in, out] Regs x64 processor context + @param[in] InstructionData Instruction parsing context + + @retval 0 Event handled successfully + @retval Others New exception value to propagate + +**/ +STATIC +UINT64 +RdtscExit ( + IN OUT GHCB *Ghcb, + IN OUT EFI_SYSTEM_CONTEXT_X64 *Regs, + IN SEV_ES_INSTRUCTION_DATA *InstructionData + ) +{ + UINT64 Status; + + Status =3D VmgExit (Ghcb, SvmExitRdtsc, 0, 0); + if (Status) { + return Status; + } + + if (!GhcbIsRegValid (Ghcb, GhcbRax) || + !GhcbIsRegValid (Ghcb, GhcbRdx)) { + return UnsupportedExit (Ghcb, Regs, InstructionData); + } + Regs->Rax =3D Ghcb->SaveArea.Rax; + Regs->Rdx =3D Ghcb->SaveArea.Rdx; + + return 0; +} + /** Common #VC exception handling routine. =20 @@ -1237,6 +1276,10 @@ DoVcCommon ( =20 ExitCode =3D Regs->ExceptionData; switch (ExitCode) { + case SvmExitRdtsc: + NaeExit =3D RdtscExit; + break; + case SvmExitCpuid: NaeExit =3D CpuidExit; break; --=20 2.17.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#57849): https://edk2.groups.io/g/devel/message/57849 Mute This Topic: https://groups.io/mt/73201912/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-