From patchwork Mon Jun 20 22:59:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kalra, Ashish" X-Patchwork-Id: 12888403 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0019CCA47C for ; Mon, 20 Jun 2022 22:59:35 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 44A7B6B0073; Mon, 20 Jun 2022 18:59:35 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3F9D66B0074; Mon, 20 Jun 2022 18:59:35 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2C2388E0001; Mon, 20 Jun 2022 18:59:35 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 1DE456B0073 for ; Mon, 20 Jun 2022 18:59:35 -0400 (EDT) Received: from smtpin31.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id ECCB420627 for ; Mon, 20 Jun 2022 22:59:34 +0000 (UTC) X-FDA: 79600132668.31.CD9E520 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (mail-bn8nam11on2083.outbound.protection.outlook.com [40.107.236.83]) by imf15.hostedemail.com (Postfix) with ESMTP id 7C4D0A000A for ; Mon, 20 Jun 2022 22:59:34 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Tk2dEX4b2KLhHMfixP65J7XawgJjop2VsOpVsAEq/5fm8i29Yond5EGE15FvmsthOGNIU4Qck02C1LO9IOLdp4uBY7xBQEo9aicYTNg41NrMSukfA+PeeNHh+X/xb6xNySoOsqtwyVu0ijTbiyyDyVkjmKVvKwHQCMVqA5LDq4JLXCpkl7ET7xRzkWT9Cz5GV9/HDs72n4JDQ+xAgRz30rStWtkuS6xHsip/xj6mOxVM9K6m4CeCAx44jHBPLkQG6WP3qWRpvH2odkpNu6rT65xphhAExpMrpmUs15t8FepcYaEbIQA6ZJZ7GYLo4YhagW907AWhlJJ+bM3Xw5ncuQ== 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=qWtkoywXsFUOi7HV75QlnjfiZABOS8Pl5BSeXom/RJo=; b=kmqokeZKPg4BT62eVIRMQ9EoBm8gjIrMkZfzXbua7pItAMdGY0JqxYk7foux1Y1/PWa/QV+CkR8lDW0nMugTlYzMmo12nsQjqWGPfjIeKLqbHr2NuLrvzuCC7k7iHCk6eOvtbUckfxlvvLNnGIJZlWofCj7ZjQcZdRR0wAGue7zh6Kw5Jsy1+50bzE+OhPluAhltj64m811Ra7lNVO3biqb8UDyKomseM7A2D4sVM5I8GEXZRq8YTxFSyN11EfTYGI+tXlXMHknUnk347XoFWcdRaHcgUBPXdtLUXBqbB1bG+M50SZzBfZKymysH7lp5SpgKhOZwWRJjc1JQ808SRQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=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=qWtkoywXsFUOi7HV75QlnjfiZABOS8Pl5BSeXom/RJo=; b=3B4OVeW26zqCeQFUD8o/1y12WqTVC9LpkOSF9KtYvp3+AolIv0xQUwp5Hsk/vgmfaT0mD8WH/hstaY2gFVSB6jqIPGgCXG7IlMuZwdBLr8yUnRLuOyyBqeWO5jVOIbubBlA6iNQwn7FgmeEWzU/sVq7EcV1oWzgAQB6U/2MZ5H8= Received: from BN6PR14CA0018.namprd14.prod.outlook.com (2603:10b6:404:79::28) by BYAPR12MB3142.namprd12.prod.outlook.com (2603:10b6:a03:de::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5353.19; Mon, 20 Jun 2022 22:59:31 +0000 Received: from BN8NAM11FT011.eop-nam11.prod.protection.outlook.com (2603:10b6:404:79:cafe::5f) by BN6PR14CA0018.outlook.office365.com (2603:10b6:404:79::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5353.14 via Frontend Transport; Mon, 20 Jun 2022 22:59:31 +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 BN8NAM11FT011.mail.protection.outlook.com (10.13.176.140) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5353.14 via Frontend Transport; Mon, 20 Jun 2022 22:59:31 +0000 Received: from ashkalraubuntuserver.amd.com (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 15.1.2375.28; Mon, 20 Jun 2022 17:59:29 -0500 From: Ashish Kalra To: , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH Part2 v6 02/49] iommu/amd: Introduce function to check SEV-SNP support Date: Mon, 20 Jun 2022 22:59:19 +0000 Message-ID: <12df64394b1788156c8a3c2ee8dfd62b51ab3a81.1655761627.git.ashish.kalra@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: 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-Office365-Filtering-Correlation-Id: 82e25892-27e4-4c49-59f7-08da53108979 X-MS-TrafficTypeDiagnostic: BYAPR12MB3142:EE_ X-Microsoft-Antispam-PRVS: 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:(13230016)(4636009)(396003)(376002)(136003)(346002)(39860400002)(46966006)(36840700001)(40470700004)(41300700001)(2616005)(426003)(82310400005)(186003)(16526019)(336012)(26005)(83380400001)(47076005)(36860700001)(36756003)(40480700001)(7696005)(7416002)(81166007)(356005)(2906002)(6666004)(54906003)(5660300002)(8936002)(478600001)(86362001)(70206006)(70586007)(4326008)(8676002)(316002)(40460700003)(110136005)(82740400003)(7406005)(2101003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jun 2022 22:59:31.6735 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 82e25892-27e4-4c49-59f7-08da53108979 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: BN8NAM11FT011.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR12MB3142 ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1655765974; a=rsa-sha256; cv=pass; b=zvnjkAi0w6V0kfc8Z9cPBzXgfluDf1kEAJhJqnCp17nz7pUTUe2UcVABiflrubmw68AcZ+ oFdyiW762K/IAiDm1NGViLWiPaQykzK9JohTTzggOtBg+8nuQGe5JKu7QmDc1KfV6wX4S7 t94TCPuyojuHVatn4LOlBv/rAPvUj/g= ARC-Authentication-Results: i=2; imf15.hostedemail.com; dkim=pass header.d=amd.com header.s=selector1 header.b=3B4OVeW2; dmarc=pass (policy=quarantine) header.from=amd.com; arc=pass ("microsoft.com:s=arcselector9901:i=1"); spf=pass (imf15.hostedemail.com: domain of Ashish.Kalra@amd.com designates 40.107.236.83 as permitted sender) smtp.mailfrom=Ashish.Kalra@amd.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1655765974; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=qWtkoywXsFUOi7HV75QlnjfiZABOS8Pl5BSeXom/RJo=; b=7RNC2Uf28jIeJ0uw6imMuCPo0Ayf6e55HYxy7sZblotM1NnhczvG9eAMcDzzBbDJNtXRzh BMcPR9AxpAPgSB1EzGC42vPihvMSmbFNLdmmneSJ+kCDaeYLsQ1fMhYBPBf1xC85rU0oqk X8zWTqaWs4fHPmVwyGAIrFmF/8zolyc= Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=amd.com header.s=selector1 header.b=3B4OVeW2; dmarc=pass (policy=quarantine) header.from=amd.com; arc=pass ("microsoft.com:s=arcselector9901:i=1"); spf=pass (imf15.hostedemail.com: domain of Ashish.Kalra@amd.com designates 40.107.236.83 as permitted sender) smtp.mailfrom=Ashish.Kalra@amd.com X-Stat-Signature: zjpin5sms4zducchtjgkty8ktncrkrfi X-Rspamd-Queue-Id: 7C4D0A000A X-Rspam-User: X-Rspamd-Server: rspam03 X-HE-Tag: 1655765974-979696 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Brijesh Singh The SEV-SNP support requires that IOMMU must to enabled, see the IOMMU spec section 2.12 for further details. If IOMMU is not enabled or the SNPSup extended feature register is not set then the SNP_INIT command (used for initializing firmware) will fail. The iommu_sev_snp_supported() can be used to check if IOMMU supports the SEV-SNP feature. Signed-off-by: Brijesh Singh --- drivers/iommu/amd/init.c | 30 ++++++++++++++++++++++++++++++ include/linux/iommu.h | 9 +++++++++ 2 files changed, 39 insertions(+) diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 1a3ad58ba846..82be8067ddf5 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -3361,3 +3361,33 @@ int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 return iommu_pc_get_set_reg(iommu, bank, cntr, fxn, value, true); } + +bool iommu_sev_snp_supported(void) +{ + struct amd_iommu *iommu; + + /* + * The SEV-SNP support requires that IOMMU must be enabled, and is + * not configured in the passthrough mode. + */ + if (no_iommu || iommu_default_passthrough()) { + pr_err("SEV-SNP: IOMMU is either disabled or configured in passthrough mode.\n"); + return false; + } + + /* + * Iterate through all the IOMMUs and verify the SNPSup feature is + * enabled. + */ + for_each_iommu(iommu) { + if (!iommu_feature(iommu, FEATURE_SNP)) { + pr_err("SNPSup is disabled (devid: %02x:%02x.%x)\n", + PCI_BUS_NUM(iommu->devid), PCI_SLOT(iommu->devid), + PCI_FUNC(iommu->devid)); + return false; + } + } + + return true; +} +EXPORT_SYMBOL_GPL(iommu_sev_snp_supported); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 9208eca4b0d1..fecb72e1b11b 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -675,6 +675,12 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev, void iommu_sva_unbind_device(struct iommu_sva *handle); u32 iommu_sva_get_pasid(struct iommu_sva *handle); +#ifdef CONFIG_AMD_MEM_ENCRYPT +bool iommu_sev_snp_supported(void); +#else +static inline bool iommu_sev_snp_supported(void) { return false; } +#endif + #else /* CONFIG_IOMMU_API */ struct iommu_ops {}; @@ -1031,6 +1037,9 @@ static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) { return NULL; } + +static inline bool iommu_sev_snp_supported(void) { return false; } + #endif /* CONFIG_IOMMU_API */ /**