From patchwork Wed Jun 2 14:10:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brijesh Singh X-Patchwork-Id: 452655 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER, SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5FFC8C4708F for ; Wed, 2 Jun 2021 14:15:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 495AE613EE for ; Wed, 2 Jun 2021 14:15:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230204AbhFBORY (ORCPT ); Wed, 2 Jun 2021 10:17:24 -0400 Received: from mail-bn8nam11on2046.outbound.protection.outlook.com ([40.107.236.46]:14177 "EHLO NAM11-BN8-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S232086AbhFBOPW (ORCPT ); Wed, 2 Jun 2021 10:15:22 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=m5dM77ilCsrnsKmWcP0aCRLj0G4TkE5YCg/Y12ziFyjAvMMMVGwSOGCc2L1BRnoM7LrUL2lvTEzViOKHSOUHOrwnniI5vwOuNRQc4Q/pMxsSjX7jgbTMwPWlhYYCHLGHOOoVtTzGP7vdYKcr5hc6cJ2z7XBx5Ix9Q2wCNFkyk+gU/tIu1NovDyqk8RC95hQQkkdIb3kQmpYMJnxcvE9wCCs1EcFfZSaKQB6+vUq9Ce5YM651Uqv3yCZ58DeDau6EeizcIhpoh8XQGcnkDKAkWW90va/RuKvDih9aQLFPiesqlYX8UeOywYJ869TPxSvcZTduX/0S6C8cXMGjsuxwtw== 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=UuTtlJI+WhUL7P1v0QZxB9ntK8AC1kuUHWv7DNtgqec=; b=eG6Qz3huKK0qlmPrFcoFrtWGYaudvGz5H7+kVdMpMJj0oNsbowciBl8FbYyAZehHZe+CxKl27FjbLAQE7P4V1y+gSPo5/rSyEXs5rp0PUS/PmuwIJGuVSKQSGCo01L2vK0OGh2lHd4DScVmn2gsyVQfs0PzBnapbQYIKsc9AsgNLkM7dYPuws5hFFE+iTxamKUhQF+4FwurWbz5ANycsH20Z1N4Z8UPmZmdMiVat+OcB8EvEhupEQ8VJgU5TwsR5bOXI06/7IYgvCJ9ui5LFH0+k7uY8QLToKKRzVVulHmV+C4gEqV9U6rRDyNO4Pq/XZ8H4ZC16+N6uKaVnu1PQpw== 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=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=UuTtlJI+WhUL7P1v0QZxB9ntK8AC1kuUHWv7DNtgqec=; b=FHwo2nRsY1QSriOYA2ZMFRGHq0uJY7gfGbzO6A156oKqDBKZaVkNdYK0dm2wXGPS+I+qbp9GHs/2vc5wvclV1mnbLLJYYYY+RJCrnVSteZUgy2b9q01VotGNDksqE7AQF5Nb1AtF3I5WueyGrhG48GWydUMW578erYLbdZg8yMY= Authentication-Results: kernel.org; dkim=none (message not signed) header.d=none; kernel.org; dmarc=none action=none header.from=amd.com; Received: from SN6PR12MB2718.namprd12.prod.outlook.com (2603:10b6:805:6f::22) by SN1PR12MB2368.namprd12.prod.outlook.com (2603:10b6:802:32::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4195.20; Wed, 2 Jun 2021 14:11:43 +0000 Received: from SN6PR12MB2718.namprd12.prod.outlook.com ([fe80::9898:5b48:a062:db94]) by SN6PR12MB2718.namprd12.prod.outlook.com ([fe80::9898:5b48:a062:db94%6]) with mapi id 15.20.4173.030; Wed, 2 Jun 2021 14:11:43 +0000 From: Brijesh Singh To: x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org, linux-crypto@vger.kernel.org Cc: Thomas Gleixner , Ingo Molnar , Joerg Roedel , Tom Lendacky , "H. Peter Anvin" , Ard Biesheuvel , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Andy Lutomirski , Dave Hansen , Sergio Lopez , Peter Gonda , Peter Zijlstra , Srinivas Pandruvada , David Rientjes , tony.luck@intel.com, npmccallum@redhat.com, Borislav Petkov , Brijesh Singh Subject: [PATCH Part2 RFC v3 12/37] crypto: ccp: Add support to initialize the AMD-SP for SEV-SNP Date: Wed, 2 Jun 2021 09:10:32 -0500 Message-Id: <20210602141057.27107-13-brijesh.singh@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210602141057.27107-1-brijesh.singh@amd.com> References: <20210602141057.27107-1-brijesh.singh@amd.com> X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: SA0PR11CA0056.namprd11.prod.outlook.com (2603:10b6:806:d0::31) To SN6PR12MB2718.namprd12.prod.outlook.com (2603:10b6:805:6f::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from sbrijesh-desktop.amd.com (165.204.77.1) by SA0PR11CA0056.namprd11.prod.outlook.com (2603:10b6:806:d0::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4195.20 via Frontend Transport; Wed, 2 Jun 2021 14:11:42 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: f65a89c6-c2a9-456d-077c-08d925d05957 X-MS-TrafficTypeDiagnostic: SN1PR12MB2368: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7691; X-MS-Exchange-SenderADCheck: 1 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:SN6PR12MB2718.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(136003)(396003)(376002)(366004)(346002)(39860400002)(5660300002)(86362001)(6486002)(52116002)(7696005)(44832011)(38350700002)(38100700002)(956004)(2616005)(1076003)(8676002)(7416002)(8936002)(478600001)(186003)(316002)(4326008)(16526019)(26005)(66556008)(66476007)(2906002)(36756003)(54906003)(83380400001)(6666004)(66946007)(134885004); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: f65a89c6-c2a9-456d-077c-08d925d05957 X-MS-Exchange-CrossTenant-AuthSource: SN6PR12MB2718.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jun 2021 14:11:43.3815 (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: e9whaJ3936iNvAMi3R5uxGEQct6Z/ybFANuAl0ksS2ih62Ix/2xm+pxxtcTuFQCg05XiJjTeqIPMZTrQFENSsQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR12MB2368 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Before SNP VMs can be launched, the platform must be appropriately configured and initialized. Platform initialization is accomplished via the SNP_INIT command. Signed-off-by: Brijesh Singh --- drivers/crypto/ccp/sev-dev.c | 111 +++++++++++++++++++++++++++++++++-- drivers/crypto/ccp/sev-dev.h | 2 + include/linux/psp-sev.h | 16 +++++ 3 files changed, 124 insertions(+), 5 deletions(-) diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index 0331d4cea7da..2203167dbc2e 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -591,6 +591,92 @@ static int sev_update_firmware(struct device *dev) return ret; } +static void snp_set_hsave_pa(void *arg) +{ + wrmsrl(MSR_VM_HSAVE_PA, 0); +} + +static int __sev_snp_init_locked(int *error) +{ + struct psp_device *psp = psp_master; + struct sev_device *sev; + int rc = 0; + + if (!psp || !psp->sev_data) + return -ENODEV; + + sev = psp->sev_data; + + if (sev->snp_inited) + return 0; + + /* SNP_INIT requires the MSR_VM_HSAVE_PA must be set to 0h across all cores. */ + on_each_cpu(snp_set_hsave_pa, NULL, 1); + + /* Prepare for first SEV guest launch after INIT */ + wbinvd_on_all_cpus(); + + /* Issue the SNP_INIT firmware command. */ + rc = __sev_do_cmd_locked(SEV_CMD_SNP_INIT, NULL, error); + if (rc) + return rc; + + sev->snp_inited = true; + dev_dbg(sev->dev, "SEV-SNP firmware initialized\n"); + + return rc; +} + +int sev_snp_init(int *error) +{ + int rc; + + if (!cpu_feature_enabled(X86_FEATURE_SEV_SNP)) + return -ENODEV; + + mutex_lock(&sev_cmd_mutex); + rc = __sev_snp_init_locked(error); + mutex_unlock(&sev_cmd_mutex); + + return rc; +} +EXPORT_SYMBOL_GPL(sev_snp_init); + +static int __sev_snp_shutdown_locked(int *error) +{ + struct sev_device *sev = psp_master->sev_data; + int ret; + + if (!sev->snp_inited) + return 0; + + /* SHUTDOWN requires the DF_FLUSH */ + wbinvd_on_all_cpus(); + __sev_do_cmd_locked(SEV_CMD_SNP_DF_FLUSH, NULL, NULL); + + ret = __sev_do_cmd_locked(SEV_CMD_SNP_SHUTDOWN, NULL, error); + if (ret) { + dev_err(sev->dev, "SEV-SNP firmware shutdown failed\n"); + return ret; + } + + sev->snp_inited = false; + dev_dbg(sev->dev, "SEV-SNP firmware shutdown\n"); + + return ret; +} + +static int sev_snp_shutdown(int *error) +{ + int rc; + + mutex_lock(&sev_cmd_mutex); + rc = __sev_snp_shutdown_locked(NULL); + mutex_unlock(&sev_cmd_mutex); + + return rc; +} + static int sev_ioctl_do_pek_import(struct sev_issue_cmd *argp, bool writable) { struct sev_device *sev = psp_master->sev_data; @@ -1095,6 +1181,21 @@ void sev_pci_init(void) "SEV: TMR allocation failed, SEV-ES support unavailable\n"); } + /* + * If boot CPU supports the SNP, then let first attempt to initialize + * the SNP firmware. + */ + if (cpu_feature_enabled(X86_FEATURE_SEV_SNP)) { + rc = sev_snp_init(&error); + if (rc) { + /* + * If we failed to INIT SNP then don't abort the probe. + * Continue to initialize the legacy SEV firmware. + */ + dev_err(sev->dev, "SEV-SNP: failed to INIT error %#x\n", error); + } + } + /* Initialize the platform */ rc = sev_platform_init(&error); if (rc && (error == SEV_RET_SECURE_DATA_INVALID)) { @@ -1109,13 +1210,11 @@ void sev_pci_init(void) rc = sev_platform_init(&error); } - if (rc) { + if (rc) dev_err(sev->dev, "SEV: failed to INIT error %#x\n", error); - return; - } - dev_info(sev->dev, "SEV API:%d.%d build:%d\n", sev->api_major, - sev->api_minor, sev->build); + dev_info(sev->dev, "SEV%s API:%d.%d build:%d\n", sev->snp_inited ? + "-SNP" : "", sev->api_major, sev->api_minor, sev->build); return; @@ -1138,4 +1237,6 @@ void sev_pci_exit(void) get_order(SEV_ES_TMR_SIZE)); sev_es_tmr = NULL; } + + sev_snp_shutdown(NULL); } diff --git a/drivers/crypto/ccp/sev-dev.h b/drivers/crypto/ccp/sev-dev.h index 666c21eb81ab..186ad20cbd24 100644 --- a/drivers/crypto/ccp/sev-dev.h +++ b/drivers/crypto/ccp/sev-dev.h @@ -52,6 +52,8 @@ struct sev_device { u8 build; void *cmd_buf; + + bool snp_inited; }; int sev_dev_init(struct psp_device *psp); diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h index c3755099ab55..1b53e8782250 100644 --- a/include/linux/psp-sev.h +++ b/include/linux/psp-sev.h @@ -748,6 +748,20 @@ struct sev_data_snp_init_ex { */ int sev_platform_init(int *error); +/** + * sev_snp_init - perform SEV SNP_INIT command + * + * @error: SEV command return code + * + * Returns: + * 0 if the SEV successfully processed the command + * -%ENODEV if the SEV device is not available + * -%ENOTSUPP if the SEV does not support SEV + * -%ETIMEDOUT if the SEV command timed out + * -%EIO if the SEV returned a non-zero return code + */ +int sev_snp_init(int *error); + /** * sev_platform_status - perform SEV PLATFORM_STATUS command * @@ -855,6 +869,8 @@ sev_platform_status(struct sev_user_data_status *status, int *error) { return -E static inline int sev_platform_init(int *error) { return -ENODEV; } +static inline int sev_snp_init(int *error) { return -ENODEV; } + static inline int sev_guest_deactivate(struct sev_data_deactivate *data, int *error) { return -ENODEV; }