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Tue, 4 Feb 2020 23:02:18 +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 v4 16/40] UefiCpuPkg/CpuExceptionHandler: Add support for RDPMC NAE events Date: Tue, 4 Feb 2020 17:01:20 -0600 Message-Id: <120361d3390b049782aab490b38776080736abdc.1580857303.git.thomas.lendacky@amd.com> In-Reply-To: References: X-ClientProxiedBy: SN6PR16CA0062.namprd16.prod.outlook.com (2603:10b6:805:ca::39) To DM6PR12MB3163.namprd12.prod.outlook.com (2603:10b6:5:15e::26) MIME-Version: 1.0 X-Received: from tlendack-t1.amd.com (165.204.77.1) by SN6PR16CA0062.namprd16.prod.outlook.com (2603:10b6:805:ca::39) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2686.32 via Frontend Transport; Tue, 4 Feb 2020 23:02:17 +0000 X-Originating-IP: [165.204.77.1] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: fefb3801-9140-4ba1-77fc-08d7a9c6484c X-MS-TrafficTypeDiagnostic: DM6PR12MB3930:|DM6PR12MB3930: 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: vstaW7X1JSCQ0dgr0ALi7ou7x1787277AA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1580857340; bh=0IjRWO9PtFi44LUFZ5oRlaFc1v382yZrSqi41kL3a1o=; h=Cc:Content-Type:Date:From:Reply-To:Subject:To; b=bLkH0mLp+PTl29v1JViIgKC39QXWfJzm5tI7GrH90uFbTH+htWM/za7BHniyelNEnMZ bSpgvE/MXpQt4QG4K2R2VOV4AQJnepQyy+k5JdXZBfGc9YgeYAgNYqWuzswE3+5GuRqKt BDgKvZRYz4fCbGH5Q9bKC/myaJE1wi+uc9g= 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 RDPMC 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/AMDSevVcCommon.c | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c= b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c index 552fe2e1a343..c2bc213e602c 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c @@ -894,6 +894,34 @@ CpuidExit ( return 0; } =20 +STATIC +UINT64 +RdpmcExit ( + GHCB *Ghcb, + EFI_SYSTEM_CONTEXT_X64 *Regs, + SEV_ES_INSTRUCTION_DATA *InstructionData + ) +{ + UINT64 Status; + + Ghcb->SaveArea.Rcx =3D Regs->Rcx; + GhcbSetRegValid (Ghcb, GhcbRcx); + + Status =3D VmgExit (Ghcb, SvmExitRdpmc, 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; +} + STATIC UINT64 RdtscExit ( @@ -939,6 +967,10 @@ DoVcCommon ( NaeExit =3D RdtscExit; break; =20 + case SvmExitRdpmc: + NaeExit =3D RdpmcExit; + 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. 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