From patchwork Mon Oct 16 13:27:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Roth X-Patchwork-Id: 734540 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 863ACCDB482 for ; Mon, 16 Oct 2023 13:33:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233719AbjJPNd6 (ORCPT ); Mon, 16 Oct 2023 09:33:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47322 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232380AbjJPNdq (ORCPT ); Mon, 16 Oct 2023 09:33:46 -0400 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2042.outbound.protection.outlook.com [40.107.220.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B006115; Mon, 16 Oct 2023 06:33:44 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=PAi2buTiq+H/izJ5fTh9M/590/HAlqHbRsPLPVoHoFsuqHMpdJvFCNeJKMXgUzVeEnl3ex0RmtnV2bfRJ2JAXEGLxVLBWAS5kow2dEOniO++UYTYfIpaKCwk/R3nybC4/bz9BMYUXt7TLVPUtTVi4aZg8McoSTsXFTFCqjxfWnvoP8XXWEwR7Q/3fuRz7AGNUzf+XmJViN1ufEpmTXThR0ZCcfqAw+4jNoSD7FZgcqR9gcLWPLQ6Y7RF84v5cdag7j0nV7HH2g+ygFkYvuUQWBxNrmCmSLlE8aO5zVS80F4FJokCaDBJmDYTgkpC/jyKUgdw+XZN5s63X0j+oNZThg== 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=lXcQILof/l/QK7fWQXg1rZMQQPkO2ffgeXV/f0lvuGE=; b=dOlrx26Lz/9XO/jh9T3olTyLeX45bHVRdbFRj7HLuwaJs8a+qGzDZuPd3JcbAanKuizmbR/AXzpqkLVob+9C8T5CCa9Zmo2ZQmx0Siu6KSNxFHcfj1yTi9fDx36k27LMWbhfKGxYwuWE5fiC7anI0q5/sKKBxaOt+iq8UEtN/P6kXJ6iWFUImaW9+Na0v7GaHN6CCvI5Ld33XYLyfseF+hbNddUHZA4CUyiSuq0dNlWN+j8BtjlmnlDyWfgEWxYqPk2sp7OW2KLaXFv9bt5YKAXL1epXV9ZAJ6bquxHBHuP0NMDmwDw7UkOigQASq7EDWUNJsOVaEmoTUiDIpBM2ng== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=lXcQILof/l/QK7fWQXg1rZMQQPkO2ffgeXV/f0lvuGE=; b=UQ+m/DXReuJWwVnSZqfEaxaaS/DT4PGmu4UtpHyYuygWqsRJAzl55pd2kOO++G5X6wKYGE/2mWfuXtbQQh0kBchiuqaqnUKVQwbRgDPV7FM/tX30wJEjleAoYT/nF4Ur5k/eJBPiQoXNDdNtskZv9k6S8Sk6iPvkJIormAUzujM= Received: from BYAPR06CA0053.namprd06.prod.outlook.com (2603:10b6:a03:14b::30) by BN9PR12MB5353.namprd12.prod.outlook.com (2603:10b6:408:102::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6886.36; Mon, 16 Oct 2023 13:33:41 +0000 Received: from MWH0EPF000989E9.namprd02.prod.outlook.com (2603:10b6:a03:14b:cafe::49) by BYAPR06CA0053.outlook.office365.com (2603:10b6:a03:14b::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6886.30 via Frontend Transport; Mon, 16 Oct 2023 13:33:41 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by MWH0EPF000989E9.mail.protection.outlook.com (10.167.241.136) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6838.22 via Frontend Transport; Mon, 16 Oct 2023 13:33:40 +0000 Received: from localhost (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Mon, 16 Oct 2023 08:33:39 -0500 From: Michael Roth To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Brijesh Singh Subject: [PATCH v10 19/50] crypto: ccp: Add the SNP_PLATFORM_STATUS command Date: Mon, 16 Oct 2023 08:27:48 -0500 Message-ID: <20231016132819.1002933-20-michael.roth@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231016132819.1002933-1-michael.roth@amd.com> References: <20231016132819.1002933-1-michael.roth@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000989E9:EE_|BN9PR12MB5353:EE_ X-MS-Office365-Filtering-Correlation-Id: d08bd776-4bdd-4783-3ec1-08dbce4c82bc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: k5ni9QG62QhO6o74mEm1Gp7OruyYUd2gjPYuuqRf9ZEDMmQJpDFu46Ld+6oHdKATJw5G0qM040mtNevV23pecK8eq426fEgEC0DBeEzchndd0QaIKUb2FPhCDvdsEVLJuPdnUBOSWCafXVoujCkFv3vix25i/lvXyN3WCL2N7MeQWPg/aW/Mdg3Ccpk9niKgyDr5zxgZOX5F/UT17RrF2sR7MidzgfS/AfdkUwphXvl7E53eRhraAxmJBXX3RVZGdPj60P51ZhyEwhz8chRVJfz8+x/FwWIeJWhf0EdcQnOFxnOZZnd4NSuEZul4c3UeuONhq8+6iwHJD7QHgr31LvgUVG6AUWv2wBvZ7YUsnjJBAEKY9bOxxuWXVP7pBoOgdC3DaFh31d467fPFTzEF2cxEEFuAPAYVx8LTpCFNd4jV7iZjcyvL28RVAa0npzMV7PQM1KifRDrsgHXhDKHfQyCCsKs3h0wrolbO23vcv+MWQVYdwZhWnD0Ux0t9XPSJ/ROh1sUyvtUh4wADNFo00k68u4mVGqdipq4SEVRYxmlXM75wCcCfOs+F5xiGPpqjuCdtHSCJwNFESej65QseaLN7RiB2zsgx8JZqGoPNbt9XlSlVs9g1xNSxy6Djud7evNrnoiI/c+5YOgXWEQ4DD1npyP9zUQZv4XKz63mr7hCEndDdVprkoWgU024n0vsXC9LCEFyWPEepQA9QP+2EazMdbuolBInzX1M9kG59njGTAvowAODlmr9zVJBGZQS1X7kHVARFiYFbEquFZKlQyg== X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230031)(4636009)(376002)(39860400002)(346002)(136003)(396003)(230922051799003)(451199024)(82310400011)(64100799003)(186009)(1800799009)(36840700001)(40470700004)(46966006)(40460700003)(40480700001)(82740400003)(356005)(36756003)(47076005)(36860700001)(83380400001)(6666004)(16526019)(26005)(70586007)(70206006)(6916009)(54906003)(316002)(478600001)(2616005)(1076003)(426003)(336012)(41300700001)(44832011)(7416002)(7406005)(81166007)(86362001)(2906002)(5660300002)(8936002)(8676002)(4326008)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Oct 2023 13:33:40.7705 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d08bd776-4bdd-4783-3ec1-08dbce4c82bc X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000989E9.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN9PR12MB5353 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: Brijesh Singh The command can be used by the userspace to query the SNP platform status report. See the SEV-SNP spec for more details. Signed-off-by: Brijesh Singh Signed-off-by: Ashish Kalra --- Documentation/virt/coco/sev-guest.rst | 27 ++++++++++++++++ drivers/crypto/ccp/sev-dev.c | 45 +++++++++++++++++++++++++++ include/uapi/linux/psp-sev.h | 1 + 3 files changed, 73 insertions(+) diff --git a/Documentation/virt/coco/sev-guest.rst b/Documentation/virt/coco/sev-guest.rst index 68b0d2363af8..e828c5326936 100644 --- a/Documentation/virt/coco/sev-guest.rst +++ b/Documentation/virt/coco/sev-guest.rst @@ -67,6 +67,22 @@ counter (e.g. counter overflow), then -EIO will be returned. }; }; +The host ioctl should be called to /dev/sev device. The ioctl accepts command +id and command input structure. + +:: + struct sev_issue_cmd { + /* Command ID */ + __u32 cmd; + + /* Command request structure */ + __u64 data; + + /* firmware error code on failure (see psp-sev.h) */ + __u32 error; + }; + + 2.1 SNP_GET_REPORT ------------------ @@ -124,6 +140,17 @@ be updated with the expected value. See GHCB specification for further detail on how to parse the certificate blob. +2.4 SNP_PLATFORM_STATUS +----------------------- +:Technology: sev-snp +:Type: hypervisor ioctl cmd +:Parameters (in): struct sev_data_snp_platform_status +:Returns (out): 0 on success, -negative on error + +The SNP_PLATFORM_STATUS command is used to query the SNP platform status. The +status includes API major, minor version and more. See the SEV-SNP +specification for further details. + 3. SEV-SNP CPUID Enforcement ============================ diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index b574b0ef2b1f..679b8d6fc09a 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -1772,6 +1772,48 @@ static int sev_ioctl_do_pdh_export(struct sev_issue_cmd *argp, bool writable) return ret; } +static int sev_ioctl_snp_platform_status(struct sev_issue_cmd *argp) +{ + struct sev_device *sev = psp_master->sev_data; + struct sev_data_snp_addr buf; + struct page *status_page; + void *data; + int ret; + + if (!sev->snp_initialized || !argp->data) + return -EINVAL; + + status_page = alloc_page(GFP_KERNEL_ACCOUNT); + if (!status_page) + return -ENOMEM; + + data = page_address(status_page); + if (rmp_mark_pages_firmware(__pa(data), 1, true)) { + __free_pages(status_page, 0); + return -EFAULT; + } + + buf.gctx_paddr = __psp_pa(data); + ret = __sev_do_cmd_locked(SEV_CMD_SNP_PLATFORM_STATUS, &buf, &argp->error); + + /* Change the page state before accessing it */ + if (snp_reclaim_pages(__pa(data), 1, true)) { + snp_leak_pages(__pa(data) >> PAGE_SHIFT, 1); + return -EFAULT; + } + + if (ret) + goto cleanup; + + if (copy_to_user((void __user *)argp->data, data, + sizeof(struct sev_user_data_snp_status))) + ret = -EFAULT; + +cleanup: + __free_pages(status_page, 0); + return ret; +} + static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) { void __user *argp = (void __user *)arg; @@ -1823,6 +1865,9 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) case SEV_GET_ID2: ret = sev_ioctl_do_get_id2(&input); break; + case SNP_PLATFORM_STATUS: + ret = sev_ioctl_snp_platform_status(&input); + break; default: ret = -EINVAL; goto out; diff --git a/include/uapi/linux/psp-sev.h b/include/uapi/linux/psp-sev.h index 48e3ef91559c..b94b3687edbb 100644 --- a/include/uapi/linux/psp-sev.h +++ b/include/uapi/linux/psp-sev.h @@ -28,6 +28,7 @@ enum { SEV_PEK_CERT_IMPORT, SEV_GET_ID, /* This command is deprecated, use SEV_GET_ID2 */ SEV_GET_ID2, + SNP_PLATFORM_STATUS, SEV_MAX, };