From patchwork Mon Feb 20 18:38:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Roth X-Patchwork-Id: 13146892 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 0FFC9C27C7C for ; Mon, 20 Feb 2023 18:51:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232289AbjBTSvY (ORCPT ); Mon, 20 Feb 2023 13:51:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33702 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231939AbjBTSvX (ORCPT ); Mon, 20 Feb 2023 13:51:23 -0500 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10on2059.outbound.protection.outlook.com [40.107.92.59]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBF362195D; Mon, 20 Feb 2023 10:50:49 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=H7rUmFhUGWCoS0j2blag4pWFWPnTKKALKdu31EBSwXwhfL43Gwq7EbvG7z+qY5YbtUC5aqe/fcCQ3id3UjLwW4f7gq2KZkf2TlwYNibGZw3t+t5edpXJ3EJFM8lOIeIub+AQVQiENnh6i/PiDAgBfc1GKflSijpt6tWnCe1ui2dxTPfAGeMIImCiwUaBtjNlkwi39vZceD7YOcX3IXY/WRZUuFB5WOqTvXlkfUlpLb0nNhWNgDs/Ex71Jkww/z2zYZd93Tis4fZq+d5VTDlXHLVyDYYLqqOKYX5ZDmG9/6wCvRrRjbVswonfspq98N/h079C+gJGX2zxbSwIgM1i4Q== 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=x6nUTrm8qRU265S2b9i11RIXRilPZluYGpyCcCYUbZI=; b=DT55adSncfuYZAvNtwtsCK21oPfuqDUYbCh3hF3/OOibDkvA9YQdG5+Yv69tXNPj1JDKf/j8oRDucqcgTCugeHkaELAH/lxXtO5wJPQwsRLAVoFLf1JdhfKMZ/bvlpLuKJseT0kJLRamkIoOTqplT6uU7eu/wdpwFG0KKTRJP0KJGLdcufhelgweite5k46EtwB15omzTHQPGyuY0hTynyzZGNN6DTmlnkmq48ikSmamba7SIN1ixkyAOzEF4qTrJDPF4Wq5TqSjI691uC74yQTDBsA8RH1Po0C7b1/6C9ydJvUSjosZvxIE7LBxcv03hvpeAZcum34N4CKvSapjbQ== 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=x6nUTrm8qRU265S2b9i11RIXRilPZluYGpyCcCYUbZI=; b=myXUbkaGLcZZEp+GqoboL3oEnzYReDwkCGQfcwHZd0VSjOYIDIRGwUxyEJ4n49+qwTiwVl0ZrqgY1C+gMfjjlrPi7WG+SIVDSNLh0XgUMW+rMSEBtVnf/E+4eEo/mv9hNrDSpo/CQLjW9OD20cC+ehWQaU5ldsA1h5XgOp+0n3Q= Received: from CY5PR16CA0020.namprd16.prod.outlook.com (2603:10b6:930:10::16) by CY8PR12MB8339.namprd12.prod.outlook.com (2603:10b6:930:7e::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6111.20; Mon, 20 Feb 2023 18:49:50 +0000 Received: from CY4PEPF0000C968.namprd02.prod.outlook.com (2603:10b6:930:10:cafe::bc) by CY5PR16CA0020.outlook.office365.com (2603:10b6:930:10::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6111.20 via Frontend Transport; Mon, 20 Feb 2023 18:49:50 +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 CY4PEPF0000C968.mail.protection.outlook.com (10.167.241.72) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6134.14 via Frontend Transport; Mon, 20 Feb 2023 18:49:50 +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 15.1.2375.34; Mon, 20 Feb 2023 12:49:49 -0600 From: Michael Roth To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Brijesh Singh Subject: [PATCH RFC v8 26/56] crypto: ccp: Add the SNP_PLATFORM_STATUS command Date: Mon, 20 Feb 2023 12:38:17 -0600 Message-ID: <20230220183847.59159-27-michael.roth@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230220183847.59159-1-michael.roth@amd.com> References: <20230220183847.59159-1-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: CY4PEPF0000C968:EE_|CY8PR12MB8339:EE_ X-MS-Office365-Filtering-Correlation-Id: 572a6838-83f4-445f-5a8f-08db13733f35 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:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(39860400002)(346002)(136003)(376002)(396003)(451199018)(46966006)(36840700001)(40470700004)(2906002)(26005)(186003)(41300700001)(356005)(16526019)(82740400003)(1076003)(6666004)(44832011)(81166007)(2616005)(7406005)(5660300002)(7416002)(8936002)(36860700001)(40460700003)(316002)(86362001)(70586007)(70206006)(8676002)(4326008)(6916009)(336012)(82310400005)(478600001)(426003)(40480700001)(47076005)(83380400001)(54906003)(36756003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Feb 2023 18:49:50.4591 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 572a6838-83f4-445f-5a8f-08db13733f35 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: CY4PEPF0000C968.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB8339 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 Signed-off-by: Michael Roth --- 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 bf593e88cfd9..11ea67c944df 100644 --- a/Documentation/virt/coco/sev-guest.rst +++ b/Documentation/virt/coco/sev-guest.rst @@ -61,6 +61,22 @@ counter (e.g. counter overflow), then -EIO will be returned. __u64 fw_err; }; +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 ------------------ @@ -118,6 +134,17 @@ 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 fd8893af6ed7..65e13a562f3b 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -1751,6 +1751,48 @@ 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_mark_pages_offline(__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; @@ -1802,6 +1844,9 @@ 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 c66f7c372645..5adfaea7df97 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, };