Received: by 2002:a05:6358:9144:b0:117:f937:c515 with SMTP id r4csp3009490rwr; Fri, 21 Apr 2023 19:20:53 -0700 (PDT) X-Google-Smtp-Source: AKy350YeiXXrjEI0OIUIPZnVIhurqg7ntrGE0pqLO7jtvXOuO3QT/jAhwzY0xEPDTzK7BoIhSO4a X-Received: by 2002:a05:6a00:1c95:b0:5e4:f141:568b with SMTP id y21-20020a056a001c9500b005e4f141568bmr8106765pfw.3.1682130052954; Fri, 21 Apr 2023 19:20:52 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1682130052; cv=pass; d=google.com; s=arc-20160816; b=rT3QQ+cidOI5o/ZnNOaFDKNChH6ZVHG9HiMhYkMFeoBcytZd4Shn3RT4PKSjYuI45C SM2N2sDrAND9n3DIN06ZHzRDr/kJuNuCi5f+hpCULcBmcbeaP1zd0KeUbucXEuML+B6t uTwZwDYbEgHUBhlqyqvVYnw64kJ/40Mg1e71oAhVNeQOehxST593vSqJ6VvvsYIoRseI A7VWMhVLqktYZNjYrwxC0TP7QzODAGyX4f4bU74jdYMKDyEqqerqV+Eu70888EkXoOgO lvpOVfeeW1qbCa0gJvzYhUzB28SBpr0tqxqhf9Xbs4NNc7Tk0Cg0mckvqXwmyx6yHMxf m7SQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=SBwoM/LjwXJvKSX67F+QWcIsJfdYlo2EH5x5qfdR5fI=; b=fAE1NXBszn68gLXZVzzwpGDJPMnBbLQRYJIQkqPPtfl8nb2HicgV38w+AfatWdX8QH MClYH592byTrN3DyxWlUAi2q9n1E47YgGy1uhQY2O2HLxX70AJuNSyF61obzwmu9U101 wMwmmLrIPfK/EZRX/1Aodo9ycfvNVtlqotjRtnAjK1nr7i/H8J/Wefgl+VlJEHWZhawl 6QhdGWP9pmFZmh4KHQM3wtK0IoUbZs+/MCRrPadE2+IgnIUVRwqCYbOsfAo3S172CMfA ScminoeriAvOMzqF3T/SgHzGpIkxw/ovymvCL2w+mJI8mnHrofycFgl7if57ibm0Wa7T Z04A== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@microsoft.com header.s=selector2 header.b=Wc4QwVR8; arc=pass (i=1 spf=pass spfdomain=microsoft.com dkim=pass dkdomain=microsoft.com dmarc=pass fromdomain=microsoft.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=microsoft.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id n29-20020aa7985d000000b0063b7341250esi5707777pfq.277.2023.04.21.19.20.19; Fri, 21 Apr 2023 19:20:52 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@microsoft.com header.s=selector2 header.b=Wc4QwVR8; arc=pass (i=1 spf=pass spfdomain=microsoft.com dkim=pass dkdomain=microsoft.com dmarc=pass fromdomain=microsoft.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=microsoft.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229587AbjDVCTm (ORCPT + 99 others); Fri, 21 Apr 2023 22:19:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229548AbjDVCTh (ORCPT ); Fri, 21 Apr 2023 22:19:37 -0400 Received: from DM5PR00CU002.outbound.protection.outlook.com (mail-centralusazon11021020.outbound.protection.outlook.com [52.101.62.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ACCE62736; Fri, 21 Apr 2023 19:19:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=gRLrZnfaeVF/GsLWuf3hud6okirM9ImirG2nkNv8Tyq+Fabv9lJaeegB2RoIFB7OhnTKQyf7YLMHhyeizyu4KbZc4K0XzlDqhBst3ZmZpBubHMtpLFeuoggCdXGd3mJQb9wsHEIbGI3GoDBWV5oZXTVmLO4gYx56T4sIg+xfdesfuhhL69Y2CBDrulL3lHczCgr/AezCxubsx66Ub2PHUMvBM7ubi70aHP5nK+0Wbh3+kGw/34SWwYZW04tVmAT69TgWeWkJiGLa3p/R8Y1V5xbSNlg8N39tW6dedCkHo9sxPwqJWpOnCpQ7+C8CAYRtvmbi+ucvFtuzaHKQZIFD/w== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=SBwoM/LjwXJvKSX67F+QWcIsJfdYlo2EH5x5qfdR5fI=; b=iyzM3l84scMzdtGBRRxShywRk2D8gv1KGVyIxw/b2FzWmAqh/cagw6K0qr8owdVIpVw+AReO1GhLM/h0CrlyqWQj/kqy2Ce71ZliQB051meMnEuTntzhFrWOVfLY2vF6Vid9laHawW/CDo8FHJVfYq3hPW7Hc6KY/e1Gir7haDFOGbJHQDWO/f/jglWAdxZDlhiyN+Ma5ksJqRCsOvXZ2Zp95ZAx5syibimZw6waA+JE6hiunk3euWNqYiFJUfBz2vXS/rknd4h7khIxiX6KF+DtiRcb5+FNM1qS292tL35pujRPpkRW4ZMZ8lYth/uCHrH+ydDy98QgCMu26QXW2w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=microsoft.com; dmarc=pass action=none header.from=microsoft.com; dkim=pass header.d=microsoft.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=SBwoM/LjwXJvKSX67F+QWcIsJfdYlo2EH5x5qfdR5fI=; b=Wc4QwVR8Ep6jkOO9r+M+UAoLbMJakLiuF5gbnxI1yXzloJE+VoixqC6S/yVXgSa1FYejfaIkRjdSj1l0+uBUUU0ZaFliPCcTjmzzEwrRY3BKvzM4z9W5hRirR+iU60XQMibGhbtvTLmVEJc2tcsrY/vSxPC/Zhr5/yg245BAA2s= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=microsoft.com; Received: from BL0PR2101MB1092.namprd21.prod.outlook.com (2603:10b6:207:30::23) by DM6PR21MB1418.namprd21.prod.outlook.com (2603:10b6:5:25c::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6340.11; Sat, 22 Apr 2023 02:19:33 +0000 Received: from BL0PR2101MB1092.namprd21.prod.outlook.com ([fe80::932e:24fe:fc1b:5d30]) by BL0PR2101MB1092.namprd21.prod.outlook.com ([fe80::932e:24fe:fc1b:5d30%5]) with mapi id 15.20.6340.014; Sat, 22 Apr 2023 02:19:33 +0000 From: Dexuan Cui To: ak@linux.intel.com, arnd@arndb.de, bp@alien8.de, brijesh.singh@amd.com, dan.j.williams@intel.com, dave.hansen@linux.intel.com, haiyangz@microsoft.com, hpa@zytor.com, jane.chu@oracle.com, kirill.shutemov@linux.intel.com, kys@microsoft.com, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, rostedt@goodmis.org, sathyanarayanan.kuppuswamy@linux.intel.com, seanjc@google.com, tglx@linutronix.de, tony.luck@intel.com, wei.liu@kernel.org, x86@kernel.org, mikelley@microsoft.com Cc: linux-kernel@vger.kernel.org, Tianyu.Lan@microsoft.com, Dexuan Cui Subject: [PATCH v5 3/6] x86/hyperv: Add hv_isolation_type_tdx() to detect TDX guests Date: Fri, 21 Apr 2023 19:17:32 -0700 Message-Id: <20230422021735.27698-4-decui@microsoft.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230422021735.27698-1-decui@microsoft.com> References: <20230422021735.27698-1-decui@microsoft.com> Content-Type: text/plain X-ClientProxiedBy: CY5PR03CA0035.namprd03.prod.outlook.com (2603:10b6:930:8::20) To BL0PR2101MB1092.namprd21.prod.outlook.com (2603:10b6:207:30::23) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL0PR2101MB1092:EE_|DM6PR21MB1418:EE_ X-MS-Office365-Filtering-Correlation-Id: 486e1cf6-2c77-4cfc-070c-08db42d802fb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BL0PR2101MB1092.namprd21.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(4636009)(346002)(376002)(366004)(396003)(39860400002)(136003)(451199021)(83380400001)(2616005)(86362001)(107886003)(6512007)(6506007)(1076003)(36756003)(52116002)(478600001)(6486002)(66476007)(4326008)(66946007)(41300700001)(82950400001)(82960400001)(921005)(66556008)(316002)(786003)(6636002)(8936002)(8676002)(38100700002)(10290500003)(7416002)(186003)(2906002)(5660300002);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?xhdu4EcfaQ5bdp+xmJBzeYPP3iCwWctpI9n+mwrSzi+dFQSgEbccjxA47AF8?= =?us-ascii?Q?u23uk6tq/BZ60apzWIH1FtGxriX85JmCLUIzSpxY9ApvVHpETgiFkE+jd0/E?= =?us-ascii?Q?bPPy1YfIUIiNcH9V6xKoRkkB7z7rRIqd08c9RKSdWf/SsmueYp/8wyU1xJoa?= =?us-ascii?Q?baTX1INB8fLLP/hZAmVfvl3mvDQm+6kiPPaMFbhRoDaclu9707UsS9EhRdGF?= =?us-ascii?Q?tZFFjZFUQHOHYkC4jac/wSLa/hQMcNIeN6WPjLv4jdhtmVum58mvR2LcFeYR?= =?us-ascii?Q?M9cZTL7sA61lHrSrjhRnLJSFDPsGE4JWY/WFyH+q3e3IwSVPmu4qB4GRDXjy?= =?us-ascii?Q?O2YujJDB2ocxGnzsBpK6l8IbwD7O4cOuPjQlf9gEdp+OQ0BvDWcF4pz5bRST?= =?us-ascii?Q?Vo+w4mv0Hw9675FSQbbyQ4NBzNdY81cNL+mYDWH7iJVl7LWSBo9ArkldyQ7f?= =?us-ascii?Q?ESkCGkVKbqo2nzAH+n+vMp1mPq5mKFzN0VGVU9CsYQdK/tpZHDQlR0V27XGv?= =?us-ascii?Q?zlC6CEhgaq5zO3OPq1jpKHT8qF2HbGm0rlLmLQsF+yoJ6z1GvMSALool3yxG?= =?us-ascii?Q?QX7YD2+bRO+NsRGFE3PMdgZdXXy8nsan6HzkQD7zTr6hX0XTRZuMcuXljpwP?= =?us-ascii?Q?uSSP4Rx9awhR/dqO7MEaR690hofdsYGjtZrDkN1BPsIET9lcqjeibLaiWXfD?= =?us-ascii?Q?XtYTwjy1HcQ7YkrAEq+50iPXWt8BY3XNnp4lXv4p5+XwwqahG8UdQvVZdH4O?= =?us-ascii?Q?lhLuFkiFxKAWZ8NNu9PDIDo4JUyw9XHYXD6agPfNAonLFHhXIsdhWbNk3Uxi?= =?us-ascii?Q?/TLnMW7CRqZQ1TnQExFP0s3UHYa7sGIWZdyY0kwaRPiYo6Yg1Xhymth7hChh?= =?us-ascii?Q?lEM7yZvM6/d8LKF4tfWbPlQn97sydqVLRSxcNB45NNsY/6pGyEY4O7gfYhVO?= =?us-ascii?Q?iJvalzR3/qYVJV6OgZAyOMAcQhb/F0F+nqlutww/2VRIMwivl0Dku4moPJZr?= =?us-ascii?Q?wiLcuij186HD49U9DSKeSTjwUAKMBfbbjHb5Eh3y2AzgUxY3gCUR7Yhe0ttS?= =?us-ascii?Q?Idpy2zulzQAhokzsDUrwaQ3gHcC8k+Vml4WxzvbXD34kpN05mEuwdkntO7Gn?= =?us-ascii?Q?/Ynoawxnid5gtEDTmp0mjAYs3xGkDn/CwXjipgMYLUE0cMbCpaj4P8y+xwX1?= =?us-ascii?Q?dcokrijr/I2Bwly3XouMb0082CdWC7zcEtAOld/25ebbDkSdEQYJt9WxqeOp?= =?us-ascii?Q?Bytcrbmwhybjm8jlyeIX/3T/e1KWJjZn4O5gHUk+Pq3//wnykFoaemOxghkX?= =?us-ascii?Q?o0dbD8+redjqtydHRcDok2bsVmrA4bTvd2VhNmu69NygG9lozQzEYhEXpEeR?= =?us-ascii?Q?632t29EW4QefbF/VRtBXv8vP7DHa1cI1liW9WdFNy+GNNWNx8V5bdB3cUCQQ?= =?us-ascii?Q?3HIfTBjxMDPAIy5BLy9bChRQEKR6wwPc/7XmrBgDmiXN6WrfrTmhYjVRL5T1?= =?us-ascii?Q?Bn+tyTDMwc3BMgZDRvs0eLQnJww45UIpWrFv/PXEOQ1YhFUeHGngMcDOdvEQ?= =?us-ascii?Q?0ODcPUHWDZ44LWT1AR4M7ufBsgHKJU973pbYEP0ntEvkhVxCvlqaYbnD81cP?= =?us-ascii?Q?FXA0WuYKso0EJ0sdpuboS+GZZs4SZ/Vf4HRvzbfR3GVL?= X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 486e1cf6-2c77-4cfc-070c-08db42d802fb X-MS-Exchange-CrossTenant-AuthSource: BL0PR2101MB1092.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Apr 2023 02:19:33.4969 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: vNBs4IREa7vyIsq/gjao+qYGLZEyXEgQRuSkNbiT072ASDkC1zNQjWH2oF9FgBBTSoJXAp6Xm5TW5Rq/37UrZw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR21MB1418 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org No logic change to SNP/VBS guests. hv_isolation_type_tdx() wil be used to instruct a TDX guest on Hyper-V to do some TDX-specific operations, e.g. hv_do_hypercall() should use __tdx_hypercall(), and a TDX guest on Hyper-V should handle the Hyper-V Event/Message/Monitor pages specially. Reviewed-by: Kuppuswamy Sathyanarayanan Reviewed-by: Michael Kelley Signed-off-by: Dexuan Cui --- arch/x86/hyperv/ivm.c | 6 ++++++ arch/x86/include/asm/hyperv-tlfs.h | 3 ++- arch/x86/include/asm/mshyperv.h | 3 +++ arch/x86/kernel/cpu/mshyperv.c | 2 ++ drivers/hv/hv_common.c | 6 ++++++ include/asm-generic/mshyperv.h | 1 + 6 files changed, 20 insertions(+), 1 deletion(-) Changes in v2: Added "#ifdef CONFIG_INTEL_TDX_GUEST and #endif" for hv_isolation_type_tdx() in arch/x86/hyperv/ivm.c. Simplified the changes in ms_hyperv_init_platform(). Changes in v3: Added Kuppuswamy's Reviewed-by. Changes in v4: A minor rebase to Michael's v7 DDA patchset. Changes in v5: Added Michael's Reviewed-by. diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index 127d5b7b63de..3658ade4f412 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -400,6 +400,7 @@ bool hv_is_isolation_supported(void) } DEFINE_STATIC_KEY_FALSE(isolation_type_snp); +DEFINE_STATIC_KEY_FALSE(isolation_type_tdx); /* * hv_isolation_type_snp - Check system runs in the AMD SEV-SNP based @@ -409,3 +410,8 @@ bool hv_isolation_type_snp(void) { return static_branch_unlikely(&isolation_type_snp); } + +bool hv_isolation_type_tdx(void) +{ + return static_branch_unlikely(&isolation_type_tdx); +} diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index b4fb75bd1013..338f383c721c 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -169,7 +169,8 @@ enum hv_isolation_type { HV_ISOLATION_TYPE_NONE = 0, HV_ISOLATION_TYPE_VBS = 1, - HV_ISOLATION_TYPE_SNP = 2 + HV_ISOLATION_TYPE_SNP = 2, + HV_ISOLATION_TYPE_TDX = 3 }; /* Hyper-V specific model specific registers (MSRs) */ diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index e3cef98a0142..de7ceae9e65e 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -22,6 +22,7 @@ union hv_ghcb; DECLARE_STATIC_KEY_FALSE(isolation_type_snp); +DECLARE_STATIC_KEY_FALSE(isolation_type_tdx); typedef int (*hyperv_fill_flush_list_func)( struct hv_guest_mapping_flush_list *flush, @@ -38,6 +39,8 @@ extern u64 hv_current_partition_id; extern union hv_ghcb * __percpu *hv_ghcb_pg; +extern bool hv_isolation_type_tdx(void); + int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages); int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id); int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags); diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index ff348ebb6ae2..a87fb934cd4b 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -405,6 +405,8 @@ static void __init ms_hyperv_init_platform(void) if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP) static_branch_enable(&isolation_type_snp); + else if (hv_get_isolation_type() == HV_ISOLATION_TYPE_TDX) + static_branch_enable(&isolation_type_tdx); } if (hv_max_functions_eax >= HYPERV_CPUID_NESTED_FEATURES) { diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c index 6d40b6c7b23b..c55db7ea6580 100644 --- a/drivers/hv/hv_common.c +++ b/drivers/hv/hv_common.c @@ -271,6 +271,12 @@ bool __weak hv_isolation_type_snp(void) } EXPORT_SYMBOL_GPL(hv_isolation_type_snp); +bool __weak hv_isolation_type_tdx(void) +{ + return false; +} +EXPORT_SYMBOL_GPL(hv_isolation_type_tdx); + void __weak hv_setup_vmbus_handler(void (*handler)(void)) { } diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index afcd9ae9588c..83e56ebe0cb7 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -58,6 +58,7 @@ extern void * __percpu *hyperv_pcpu_output_arg; extern u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr); extern u64 hv_do_fast_hypercall8(u16 control, u64 input8); extern bool hv_isolation_type_snp(void); +extern bool hv_isolation_type_tdx(void); /* Helper functions that provide a consistent pattern for checking Hyper-V hypercall status. */ static inline int hv_result(u64 status) -- 2.25.1