From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (NAM10-BN7-obe.outbound.protection.outlook.com []) by mx.groups.io with SMTP id smtpd.web09.1685.1580857326836339527 for ; Tue, 04 Feb 2020 15:02:08 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=@amdcloud.onmicrosoft.com header.s=selector2-amdcloud-onmicrosoft-com header.b=3L6qNybK; spf=none, err=SPF record not found (domain: amd.com, ip: , mailfrom: thomas.lendacky@amd.com) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=n76K6t3X1mdXCu9M2DXG8CWRf+gXilXbp3K6L+9PXrIbJIhXiLcfu4fZyBr/kailNzBQVVsDCBBnBEXJ+zeGYd2lS2Whk2gnx6tGdNesu8W/QTkHEk7S0vZZvXl/7D2aUFz7K6SIvcBiPnMdtrmVY9tJikXZPcVmJNB6u0WBCTp7oOsTH7N6rhKc1/AbFqWTPbxQhK1q7ukhDax8nv/MEbN8uPGkHOKZOUD8VvigoiMf8bP2Kx2lDqP+wnUhXDztSVPbifJN+573qCrWTfdbf4gikc+WhlvUWBAqvP5ZhnbobSorUt8oNsmPuScbSv7FVd3inVyDJ41AJuGdXKHlqQ== 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=CBfVap4vPozJx1JTBBc3yU/O2JWaVQWWuzRPp+PkizU=; b=XMLGgE0XyHzVGNxgUXaLUTxxs/Zdjb/NJxYwCvjMu3G3RoLcLlBKn/UQ9bEc/SlFX8e/Pf6eNKMtTBBdhUtUzXtAIbsJLnFrGWtA7ISU0d/yYk/SU9Cb7b9YmBWDMJ6Ym06yaZPWOM5gx+Cz+orY520l4YyxPrJIA1Foh/xMzasKjHjg59yTUjZRAeLj1Saag6SrGhVG41RCIITDGRp6JhqZEea2tRT06shVIAwOldWnzNRElD+ZkD6+P3Y+0P8snb9d0uH2qpRkPbuQUTq8FgaQdGqH87PUqrar1TgSuLEze7a/232yTYOA7hd7B5J9coq27oHijd7rV9wO6ZVr6w== 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 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amdcloud.onmicrosoft.com; s=selector2-amdcloud-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=CBfVap4vPozJx1JTBBc3yU/O2JWaVQWWuzRPp+PkizU=; b=3L6qNybKbqxV30Puq1hzoKMig/13KIkpb0VGDtJP1dV2bHocxT8Zxp8ycJg4pKg3Jar+rDwCYywCcYV+6E+MwCgmUZeysSHUDyNPIOZmxxKEFM1s7ZnbhBvR3NRxvt/f65wDJs/J+MN5HRwGe5iyI1aa+PzyON49lsG3OZgb5ww= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Thomas.Lendacky@amd.com; Received: from DM6PR12MB3163.namprd12.prod.outlook.com (20.179.71.154) by DM6PR12MB3930.namprd12.prod.outlook.com (10.255.174.19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2686.29; Tue, 4 Feb 2020 23:02:07 +0000 Received: from DM6PR12MB3163.namprd12.prod.outlook.com ([fe80::a0cd:463:f444:c270]) by DM6PR12MB3163.namprd12.prod.outlook.com ([fe80::a0cd:463:f444:c270%7]) with mapi id 15.20.2707.020; Tue, 4 Feb 2020 23:02:06 +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 v4 06/40] MdePkg/BaseLib: Add support for the VMGEXIT instruction Date: Tue, 4 Feb 2020 17:01:10 -0600 Message-Id: <75355c8085d91a70d9e6a72869d877adea3fe06f.1580857303.git.thomas.lendacky@amd.com> X-Mailer: git-send-email 2.17.1 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) Return-Path: thomas.lendacky@amd.com MIME-Version: 1.0 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 23:02:05 +0000 X-Mailer: git-send-email 2.17.1 X-Originating-IP: [165.204.77.1] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: ab3eb0cc-60ac-4795-7ed8-08d7a9c641a5 X-MS-TrafficTypeDiagnostic: DM6PR12MB3930:|DM6PR12MB3930: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7691; X-Forefront-PRVS: 03030B9493 X-Forefront-Antispam-Report: SFV:NSPM;SFS:(10009020)(4636009)(39860400002)(366004)(376002)(136003)(396003)(346002)(199004)(189003)(4326008)(478600001)(6916009)(81156014)(2616005)(956004)(81166006)(8676002)(6666004)(966005)(316002)(54906003)(19627235002)(2906002)(6486002)(66476007)(66556008)(52116002)(7696005)(186003)(26005)(16526019)(5660300002)(86362001)(36756003)(66946007)(8936002);DIR:OUT;SFP:1101;SCL:1;SRVR:DM6PR12MB3930;H:DM6PR12MB3163.namprd12.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; Received-SPF: None (protection.outlook.com: amd.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: r8/8fo7mlZIQB76MZ2PR1VfRsPhxyj9HiJ0nM3iCbEe5Ch1xlPPAtiqbxgE22Dljj11BwL8H0U6364xG/3vQPOWgoT9eudgUOTqh7o51OTNC995OI9xNKlSPP59ThklxSt/p52vy1NHtu2tZsk9C0A== X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: ab3eb0cc-60ac-4795-7ed8-08d7a9c641a5 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Feb 2020 23:02:06.8546 (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: 0EW5KoeeosH/k1BR6DLOAQsvTavmdy4EftZwPXdQpNj57EHilM/Ye0c8jUbzOuz1YZcVrsS8PPqD99lOFUB3Kg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB3930 Content-Type: text/plain BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198 VMGEXIT is a new instruction used for Hypervisor/Guest communication when running as an SEV-ES guest. A VMGEXIT will cause an automatic exit (AE) to occur, resulting in a #VMEXIT with an exit code value of 0x403. Provide the necessary support to execute the VMGEXIT instruction, which is "rep; vmmcall". Cc: Michael D Kinney Cc: Liming Gao Signed-off-by: Tom Lendacky --- MdePkg/Library/BaseLib/BaseLib.inf | 2 ++ MdePkg/Include/Library/BaseLib.h | 14 +++++++++ MdePkg/Library/BaseLib/Ia32/GccInline.c | 17 +++++++++++ MdePkg/Library/BaseLib/X64/GccInline.c | 17 +++++++++++ MdePkg/Library/BaseLib/Ia32/VmgExit.nasm | 37 ++++++++++++++++++++++++ MdePkg/Library/BaseLib/X64/VmgExit.nasm | 32 ++++++++++++++++++++ 6 files changed, 119 insertions(+) create mode 100644 MdePkg/Library/BaseLib/Ia32/VmgExit.nasm create mode 100644 MdePkg/Library/BaseLib/X64/VmgExit.nasm diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf index d7a1dd017e95..62a09197b8a8 100644 --- a/MdePkg/Library/BaseLib/BaseLib.inf +++ b/MdePkg/Library/BaseLib/BaseLib.inf @@ -153,6 +153,7 @@ [Sources.Ia32] Ia32/EnableCache.c | MSFT Ia32/DisableCache.c | MSFT Ia32/XGetBv.nasm | MSFT + Ia32/VmgExit.nasm | MSFT Ia32/GccInline.c | GCC @@ -288,6 +289,7 @@ [Sources.X64] X64/ReadCr0.nasm| MSFT X64/ReadEflags.nasm| MSFT X64/XGetBv.nasm | MSFT + X64/VmgExit.nasm | MSFT X64/Non-existing.c diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h index d0cbb52ed8f9..99fff8af5a3c 100644 --- a/MdePkg/Include/Library/BaseLib.h +++ b/MdePkg/Include/Library/BaseLib.h @@ -7906,6 +7906,20 @@ AsmXGetBv ( ); +/** + Executes a VMGEXIT instruction (VMMCALL with a REP prefix) + + Executes a VMGEXIT instruction. This function is only available on IA-32 and + x64. + +**/ +VOID +EFIAPI +AsmVmgExit ( + VOID + ); + + /** Patch the immediate operand of an IA32 or X64 instruction such that the byte, word, dword or qword operand is encoded at the end of the instruction's diff --git a/MdePkg/Library/BaseLib/Ia32/GccInline.c b/MdePkg/Library/BaseLib/Ia32/GccInline.c index 591f0bb0e097..ee8c62c79c93 100644 --- a/MdePkg/Library/BaseLib/Ia32/GccInline.c +++ b/MdePkg/Library/BaseLib/Ia32/GccInline.c @@ -1791,3 +1791,20 @@ AsmXGetBv ( } +/** + Executes a VMGEXIT instruction. + + Executes a VMGEXIT instruction. This function is only available on IA-32 and + X64. + +**/ +VOID +EFIAPI +AsmVmgExit ( + VOID + ) +{ + __asm__ __volatile__ ("rep; vmmcall":::"memory"); +} + + diff --git a/MdePkg/Library/BaseLib/X64/GccInline.c b/MdePkg/Library/BaseLib/X64/GccInline.c index 3eed1205adb2..277974eff9ee 100644 --- a/MdePkg/Library/BaseLib/X64/GccInline.c +++ b/MdePkg/Library/BaseLib/X64/GccInline.c @@ -1828,3 +1828,20 @@ AsmXGetBv ( } +/** + Executes a VMGEXIT instruction. + + Executes a VMGEXIT instruction. This function is only available on IA-32 and + X64. + +**/ +VOID +EFIAPI +AsmVmgExit ( + VOID + ) +{ + __asm__ __volatile__ ("rep; vmmcall":::"memory"); +} + + diff --git a/MdePkg/Library/BaseLib/Ia32/VmgExit.nasm b/MdePkg/Library/BaseLib/Ia32/VmgExit.nasm new file mode 100644 index 000000000000..85e6260b4e2c --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/VmgExit.nasm @@ -0,0 +1,37 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2019, Advanced Micro Devices, Inc. All rights reserved.
+; SPDX-License-Identifier: BSD-2-Clause-Patent +; +; Module Name: +; +; VmgExit.Asm +; +; Abstract: +; +; AsmVmgExit function +; +; Notes: +; +;------------------------------------------------------------------------------ + + SECTION .text + +;------------------------------------------------------------------------------ +; VOID +; EFIAPI +; AsmVmgExit ( +; VOID +; ); +;------------------------------------------------------------------------------ +global ASM_PFX(AsmVmgExit) +ASM_PFX(AsmVmgExit): +; +; NASM doesn't support the vmmcall instruction in 32-bit mode, so work around +; this by temporarily switching to 64-bit mode. +; +BITS 64 + rep vmmcall +BITS 32 + ret + diff --git a/MdePkg/Library/BaseLib/X64/VmgExit.nasm b/MdePkg/Library/BaseLib/X64/VmgExit.nasm new file mode 100644 index 000000000000..400d0302c4a3 --- /dev/null +++ b/MdePkg/Library/BaseLib/X64/VmgExit.nasm @@ -0,0 +1,32 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2019, Advanced Micro Devices, Inc. All rights reserved.
+; SPDX-License-Identifier: BSD-2-Clause-Patent +; +; Module Name: +; +; VmgExit.Asm +; +; Abstract: +; +; AsmVmgExit function +; +; Notes: +; +;------------------------------------------------------------------------------ + + DEFAULT REL + SECTION .text + +;------------------------------------------------------------------------------ +; VOID +; EFIAPI +; AsmVmgExit ( +; VOID +; ); +;------------------------------------------------------------------------------ +global ASM_PFX(AsmVmgExit) +ASM_PFX(AsmVmgExit): + rep vmmcall + ret + -- 2.17.1