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Tue, 24 Mar 2020 17:41:29 +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 v6 20/42] UefiCpuPkg/CpuExceptionHandler: Add support for VMMCALL NAE events Date: Tue, 24 Mar 2020 12:40:34 -0500 Message-Id: In-Reply-To: References: X-ClientProxiedBy: DM5PR06CA0025.namprd06.prod.outlook.com (2603:10b6:3:5d::11) 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 DM5PR06CA0025.namprd06.prod.outlook.com (2603:10b6:3:5d::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2835.19 via Frontend Transport; Tue, 24 Mar 2020 17:41:28 +0000 X-Originating-IP: [165.204.77.1] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: c797506f-c9e4-4f5c-c63a-08d7d01a953b X-MS-TrafficTypeDiagnostic: DM6PR12MB3915:|DM6PR12MB3915: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:2000; 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contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,thomas.lendacky@amd.com X-Gm-Message-State: sEOtAjGLmi0xCq2SQDoq06lqx1787277AA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1585071690; bh=e8I2PGS08BMx620lCBXF/+zY8Mnf0dNQ8N7E70WIKQk=; h=Cc:Content-Type:Date:From:Reply-To:Subject:To; b=AEOjIFnOnh41xrVxpWtgYrbqdh0fUmkyxbTr/DNzqUFzg8brFLBy8ckDeR/Qd5Ytlm4 Y6iHt0yraz6+GwPh7PdeydbyUsOuraQVmoi9c/lRfRqgoSv7gW9ww0QdAWwNHQK9zMmSt ILKH/Jqgr2Dqjb3f1SVPf0zR9UrGGuYKg2U= 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 VMMCALL 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 | 34 +++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHand= ler.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c index acba14d995cb..7b57229a770c 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchAMDSevVcHandler.c @@ -609,6 +609,36 @@ WbinvdExit ( return 0; } =20 +STATIC +UINT64 +VmmCallExit ( + GHCB *Ghcb, + EFI_SYSTEM_CONTEXT_X64 *Regs, + SEV_ES_INSTRUCTION_DATA *InstructionData + ) +{ + UINT64 Status; + + DecodeModRm (Regs, InstructionData); + + Ghcb->SaveArea.Rax =3D Regs->Rax; + GhcbSetRegValid (Ghcb, GhcbRax); + Ghcb->SaveArea.Cpl =3D (UINT8) (Regs->Cs & 0x3); + GhcbSetRegValid (Ghcb, GhcbCpl); + + Status =3D VmgExit (Ghcb, SvmExitVmmCall, 0, 0); + if (Status) { + return Status; + } + + if (!GhcbIsRegValid (Ghcb, GhcbRax)) { + return UnsupportedExit (Ghcb, Regs, InstructionData); + } + Regs->Rax =3D Ghcb->SaveArea.Rax; + + return 0; +} + STATIC UINT64 MsrExit ( @@ -1005,6 +1035,10 @@ DoVcCommon ( NaeExit =3D MsrExit; break; =20 + case SvmExitVmmCall: + NaeExit =3D VmmCallExit; + break; + case SvmExitWbinvd: NaeExit =3D WbinvdExit; 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. 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