From patchwork Wed Oct 23 11:27:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rijo Thomas X-Patchwork-Id: 11206433 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 43D6D14E5 for ; Wed, 23 Oct 2019 11:27:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E41B221872 for ; Wed, 23 Oct 2019 11:27:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amdcloud.onmicrosoft.com header.i=@amdcloud.onmicrosoft.com header.b="r4XQ7vKi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404864AbfJWL1e (ORCPT ); Wed, 23 Oct 2019 07:27:34 -0400 Received: from mail-eopbgr790072.outbound.protection.outlook.com ([40.107.79.72]:4704 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732149AbfJWL1d (ORCPT ); Wed, 23 Oct 2019 07:27:33 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ONmSLROzSWK1FZeVmUthJQgRcx5toPaaC+qHp2a5N7cNJvWL+t0EGMYMQ0E+yMbmomui2W4CFEKRDg6GHYramJYFu1SiMts1bkbgY4WdgZ6KrWqkYwBrnicl6Kno2sIjcbzNY7WZsIwfQObc3v3+McsrZDyQv2lgkqlDy2s9ZH2i60VSnTxX3t8301syhch+fRpBs2+umsT+XqwwUcOx2luF8BH5kh3/VqFk75UKnlHK+yRekGW2eYZGS5UR9VwFnRSWo/iGdhihnY1hLAkpJHvjwxSUpGQ9y9s+0qwFUR36eXm6M1CVMTwBNjXzKxy9zd+zJU8Iok7fREx6GwVbxQ== 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=rSUxVR6m7rnb6cOuhA4FZG3lLtC8UCLDDdyOALuHhDk=; b=cXQmXmgz/2eI4bUjwt70GmQgTxT3HcINmnFLaawP18i4WMLKErK2XoRLI/bli9rhKcJh14sOvAd2h66D7TxHkl3x27Y8Etu/Idf1wVSEMYGQJTwFzdFv2J+hAzwIyIqNQ+Tq2X/ZfJWyGmtGf8kggyiaJNbZInGrVuIIsp5ECk1MblAqT4eAvuRrcWQco4DcYRu5MS+ehQtJeSyGgscIcI63lBQyHx9RmMDIBm2xSsh4KxnF8I4//ob5p3M7eGQKMYEYZsh0a89Hx7sErakR2BKyc/FxkzD57XAe1Xx9j0RXyewQ4RduQN6sAixgtAp5QC2ZaoX64Rpa1GTXiwOyrA== 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=amdcloud.onmicrosoft.com; s=selector2-amdcloud-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=rSUxVR6m7rnb6cOuhA4FZG3lLtC8UCLDDdyOALuHhDk=; b=r4XQ7vKi+pVZL9GKa/oD/RXxCWjoWzqWq23ySNG+TVxB+659fuvaEa+LDlBFTnvKDHUBL4L9e/BjDXA54f2WOmJSmq9pH2siUCA0nb423HO3kuf4HMuxh4+xkU7g21ea22wDcBbd8QK/4dYfsF3xSnMpuvsZYtzCWSFmJwnKpuo= Received: from CY4PR12MB1925.namprd12.prod.outlook.com (10.175.62.7) by CY4PR12MB1527.namprd12.prod.outlook.com (10.172.66.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2387.20; Wed, 23 Oct 2019 11:27:28 +0000 Received: from CY4PR12MB1925.namprd12.prod.outlook.com ([fe80::a1f5:6f09:5c0d:78f1]) by CY4PR12MB1925.namprd12.prod.outlook.com ([fe80::a1f5:6f09:5c0d:78f1%11]) with mapi id 15.20.2387.019; Wed, 23 Oct 2019 11:27:28 +0000 From: "Thomas, Rijo-john" To: "Lendacky, Thomas" , "Hook, Gary" , Herbert Xu , "David S . Miller" , "linux-kernel@vger.kernel.org" , "linux-crypto@vger.kernel.org" CC: "Thomas, Rijo-john" , "Singh, Brijesh" , "Easow, Nimesh" , "Rangasamy, Devaraj" Subject: [RFC PATCH 1/5] crypto: ccp - rename psp-dev files to sev-dev Thread-Topic: [RFC PATCH 1/5] crypto: ccp - rename psp-dev files to sev-dev Thread-Index: AQHViZTaeW4oDnl060iTQZKgrU1ykw== Date: Wed, 23 Oct 2019 11:27:28 +0000 Message-ID: <119557a5db5cc55c0e88f1543c0fabf0c820cb92.1571817675.git.Rijo-john.Thomas@amd.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MA1PR0101CA0037.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:22::23) To CY4PR12MB1925.namprd12.prod.outlook.com (2603:10b6:903:120::7) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Rijo-john.Thomas@amd.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 1.9.1 x-originating-ip: [165.204.156.251] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 11bf142f-ad72-416a-e1e8-08d757abfc22 x-ms-traffictypediagnostic: CY4PR12MB1527: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:1443; x-forefront-prvs: 019919A9E4 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(4636009)(346002)(366004)(376002)(396003)(136003)(39860400002)(189003)(199004)(2616005)(476003)(81156014)(386003)(6486002)(6506007)(14454004)(446003)(11346002)(26005)(81166006)(305945005)(86362001)(5660300002)(186003)(102836004)(7736002)(50226002)(30864003)(66946007)(6436002)(478600001)(316002)(6116002)(3846002)(99286004)(6512007)(71190400001)(25786009)(118296001)(71200400001)(8676002)(110136005)(54906003)(2906002)(8936002)(486006)(256004)(14444005)(66476007)(66556008)(64756008)(66066001)(2201001)(52116002)(76176011)(66446008)(36756003)(2501003)(4326008)(569006);DIR:OUT;SFP:1101;SCL:1;SRVR:CY4PR12MB1527;H:CY4PR12MB1925.namprd12.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: amd.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: RRbcyP1uuCWygHXtw9BNXoT0H42WUkPlXRoDf+I4W9LMTvqWYZCoLe4LImp7u7KsPfvrkqIJco4+x38jqhcqlzFkoYaXUYB95ipV6sOHhpb3z77Jgz+7rVK1F24yvapAdJYEmrWPLI9Bd7Om3xu5K0GYgQtv/uNpS92XzHjIr7VGkt0F9GTMBPVjc8KBNvJlrSxcpOPhzn6dWTQMYrgYcUDV4GJGpSdvaV5Q31wkbl5HK8ovlak3Y78mikwVI3g72p0mlt6jkri2uNVAdasufS/pr/zqzGKS6tXV3V/V8VgomsbaU4AnBbDZTeI1/umykR5yHv+mjBiB1K5K8H2XmPlxk7gVkoTtBLgWyww23lgpM1slnxaxCwubfMIqUy2Iby/andNDWqAoVq6iD7VEM9a+CINfO8efgtpfo/TaqxMf2kqdLdyMR5BDD0jTSXOv MIME-Version: 1.0 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 11bf142f-ad72-416a-e1e8-08d757abfc22 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Oct 2019 11:27:28.3830 (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: SaS1YB5Xfzs6ki1d/e6SJBMFYP1bD5vJPqwObbJOSlJw4m8maecAuzkdxkRneIAciUIOsd4toyRTfT84XcOvkQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR12MB1527 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org This is a preliminary patch for creating a generic PSP device driver file, which will have support for both SEV and TEE (Trusted Execution Environment) interface. This patch does not introduce any new functionality, but simply renames psp-dev.c and psp-dev.h files to sev-dev.c and sev-dev.h files respectively. Signed-off-by: Rijo Thomas Signed-off-by: Devaraj Rangasamy Signed-off-by: Devaraj Rangasamy Signed-off-by: Devaraj Rangasamy Signed-off-by: Rijo Thomas --- drivers/crypto/ccp/Makefile | 2 +- drivers/crypto/ccp/psp-dev.c | 1087 ------------------------------------------ drivers/crypto/ccp/psp-dev.h | 66 --- drivers/crypto/ccp/sev-dev.c | 1087 ++++++++++++++++++++++++++++++++++++++++++ drivers/crypto/ccp/sev-dev.h | 66 +++ drivers/crypto/ccp/sp-pci.c | 2 +- 6 files changed, 1155 insertions(+), 1155 deletions(-) delete mode 100644 drivers/crypto/ccp/psp-dev.c delete mode 100644 drivers/crypto/ccp/psp-dev.h create mode 100644 drivers/crypto/ccp/sev-dev.c create mode 100644 drivers/crypto/ccp/sev-dev.h -- 1.9.1 diff --git a/drivers/crypto/ccp/Makefile b/drivers/crypto/ccp/Makefile index 6b86f1e..9dafcf2 100644 --- a/drivers/crypto/ccp/Makefile +++ b/drivers/crypto/ccp/Makefile @@ -8,7 +8,7 @@ ccp-$(CONFIG_CRYPTO_DEV_SP_CCP) += ccp-dev.o \ ccp-dmaengine.o ccp-$(CONFIG_CRYPTO_DEV_CCP_DEBUGFS) += ccp-debugfs.o ccp-$(CONFIG_PCI) += sp-pci.o -ccp-$(CONFIG_CRYPTO_DEV_SP_PSP) += psp-dev.o +ccp-$(CONFIG_CRYPTO_DEV_SP_PSP) += sev-dev.o obj-$(CONFIG_CRYPTO_DEV_CCP_CRYPTO) += ccp-crypto.o ccp-crypto-objs := ccp-crypto-main.o \ diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c deleted file mode 100644 index 6b17d17..0000000 --- a/drivers/crypto/ccp/psp-dev.c +++ /dev/null @@ -1,1087 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * AMD Platform Security Processor (PSP) interface - * - * Copyright (C) 2016,2018 Advanced Micro Devices, Inc. - * - * Author: Brijesh Singh - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "sp-dev.h" -#include "psp-dev.h" - -#define DEVICE_NAME "sev" -#define SEV_FW_FILE "amd/sev.fw" -#define SEV_FW_NAME_SIZE 64 - -static DEFINE_MUTEX(sev_cmd_mutex); -static struct sev_misc_dev *misc_dev; -static struct psp_device *psp_master; - -static int psp_cmd_timeout = 100; -module_param(psp_cmd_timeout, int, 0644); -MODULE_PARM_DESC(psp_cmd_timeout, " default timeout value, in seconds, for PSP commands"); - -static int psp_probe_timeout = 5; -module_param(psp_probe_timeout, int, 0644); -MODULE_PARM_DESC(psp_probe_timeout, " default timeout value, in seconds, during PSP device probe"); - -static bool psp_dead; -static int psp_timeout; - -static inline bool sev_version_greater_or_equal(u8 maj, u8 min) -{ - if (psp_master->api_major > maj) - return true; - if (psp_master->api_major == maj && psp_master->api_minor >= min) - return true; - return false; -} - -static struct psp_device *psp_alloc_struct(struct sp_device *sp) -{ - struct device *dev = sp->dev; - struct psp_device *psp; - - psp = devm_kzalloc(dev, sizeof(*psp), GFP_KERNEL); - if (!psp) - return NULL; - - psp->dev = dev; - psp->sp = sp; - - snprintf(psp->name, sizeof(psp->name), "psp-%u", sp->ord); - - return psp; -} - -static irqreturn_t psp_irq_handler(int irq, void *data) -{ - struct psp_device *psp = data; - unsigned int status; - int reg; - - /* Read the interrupt status: */ - status = ioread32(psp->io_regs + psp->vdata->intsts_reg); - - /* Check if it is command completion: */ - if (!(status & PSP_CMD_COMPLETE)) - goto done; - - /* Check if it is SEV command completion: */ - reg = ioread32(psp->io_regs + psp->vdata->cmdresp_reg); - if (reg & PSP_CMDRESP_RESP) { - psp->sev_int_rcvd = 1; - wake_up(&psp->sev_int_queue); - } - -done: - /* Clear the interrupt status by writing the same value we read. */ - iowrite32(status, psp->io_regs + psp->vdata->intsts_reg); - - return IRQ_HANDLED; -} - -static int sev_wait_cmd_ioc(struct psp_device *psp, - unsigned int *reg, unsigned int timeout) -{ - int ret; - - ret = wait_event_timeout(psp->sev_int_queue, - psp->sev_int_rcvd, timeout * HZ); - if (!ret) - return -ETIMEDOUT; - - *reg = ioread32(psp->io_regs + psp->vdata->cmdresp_reg); - - return 0; -} - -static int sev_cmd_buffer_len(int cmd) -{ - switch (cmd) { - case SEV_CMD_INIT: return sizeof(struct sev_data_init); - case SEV_CMD_PLATFORM_STATUS: return sizeof(struct sev_user_data_status); - case SEV_CMD_PEK_CSR: return sizeof(struct sev_data_pek_csr); - case SEV_CMD_PEK_CERT_IMPORT: return sizeof(struct sev_data_pek_cert_import); - case SEV_CMD_PDH_CERT_EXPORT: return sizeof(struct sev_data_pdh_cert_export); - case SEV_CMD_LAUNCH_START: return sizeof(struct sev_data_launch_start); - case SEV_CMD_LAUNCH_UPDATE_DATA: return sizeof(struct sev_data_launch_update_data); - case SEV_CMD_LAUNCH_UPDATE_VMSA: return sizeof(struct sev_data_launch_update_vmsa); - case SEV_CMD_LAUNCH_FINISH: return sizeof(struct sev_data_launch_finish); - case SEV_CMD_LAUNCH_MEASURE: return sizeof(struct sev_data_launch_measure); - case SEV_CMD_ACTIVATE: return sizeof(struct sev_data_activate); - case SEV_CMD_DEACTIVATE: return sizeof(struct sev_data_deactivate); - case SEV_CMD_DECOMMISSION: return sizeof(struct sev_data_decommission); - case SEV_CMD_GUEST_STATUS: return sizeof(struct sev_data_guest_status); - case SEV_CMD_DBG_DECRYPT: return sizeof(struct sev_data_dbg); - case SEV_CMD_DBG_ENCRYPT: return sizeof(struct sev_data_dbg); - case SEV_CMD_SEND_START: return sizeof(struct sev_data_send_start); - case SEV_CMD_SEND_UPDATE_DATA: return sizeof(struct sev_data_send_update_data); - case SEV_CMD_SEND_UPDATE_VMSA: return sizeof(struct sev_data_send_update_vmsa); - case SEV_CMD_SEND_FINISH: return sizeof(struct sev_data_send_finish); - case SEV_CMD_RECEIVE_START: return sizeof(struct sev_data_receive_start); - case SEV_CMD_RECEIVE_FINISH: return sizeof(struct sev_data_receive_finish); - case SEV_CMD_RECEIVE_UPDATE_DATA: return sizeof(struct sev_data_receive_update_data); - case SEV_CMD_RECEIVE_UPDATE_VMSA: return sizeof(struct sev_data_receive_update_vmsa); - case SEV_CMD_LAUNCH_UPDATE_SECRET: return sizeof(struct sev_data_launch_secret); - case SEV_CMD_DOWNLOAD_FIRMWARE: return sizeof(struct sev_data_download_firmware); - case SEV_CMD_GET_ID: return sizeof(struct sev_data_get_id); - default: return 0; - } - - return 0; -} - -static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret) -{ - struct psp_device *psp = psp_master; - unsigned int phys_lsb, phys_msb; - unsigned int reg, ret = 0; - - if (!psp) - return -ENODEV; - - if (psp_dead) - return -EBUSY; - - /* Get the physical address of the command buffer */ - phys_lsb = data ? lower_32_bits(__psp_pa(data)) : 0; - phys_msb = data ? upper_32_bits(__psp_pa(data)) : 0; - - dev_dbg(psp->dev, "sev command id %#x buffer 0x%08x%08x timeout %us\n", - cmd, phys_msb, phys_lsb, psp_timeout); - - print_hex_dump_debug("(in): ", DUMP_PREFIX_OFFSET, 16, 2, data, - sev_cmd_buffer_len(cmd), false); - - iowrite32(phys_lsb, psp->io_regs + psp->vdata->cmdbuff_addr_lo_reg); - iowrite32(phys_msb, psp->io_regs + psp->vdata->cmdbuff_addr_hi_reg); - - psp->sev_int_rcvd = 0; - - reg = cmd; - reg <<= PSP_CMDRESP_CMD_SHIFT; - reg |= PSP_CMDRESP_IOC; - iowrite32(reg, psp->io_regs + psp->vdata->cmdresp_reg); - - /* wait for command completion */ - ret = sev_wait_cmd_ioc(psp, ®, psp_timeout); - if (ret) { - if (psp_ret) - *psp_ret = 0; - - dev_err(psp->dev, "sev command %#x timed out, disabling PSP \n", cmd); - psp_dead = true; - - return ret; - } - - psp_timeout = psp_cmd_timeout; - - if (psp_ret) - *psp_ret = reg & PSP_CMDRESP_ERR_MASK; - - if (reg & PSP_CMDRESP_ERR_MASK) { - dev_dbg(psp->dev, "sev command %#x failed (%#010x)\n", - cmd, reg & PSP_CMDRESP_ERR_MASK); - ret = -EIO; - } - - print_hex_dump_debug("(out): ", DUMP_PREFIX_OFFSET, 16, 2, data, - sev_cmd_buffer_len(cmd), false); - - return ret; -} - -static int sev_do_cmd(int cmd, void *data, int *psp_ret) -{ - int rc; - - mutex_lock(&sev_cmd_mutex); - rc = __sev_do_cmd_locked(cmd, data, psp_ret); - mutex_unlock(&sev_cmd_mutex); - - return rc; -} - -static int __sev_platform_init_locked(int *error) -{ - struct psp_device *psp = psp_master; - int rc = 0; - - if (!psp) - return -ENODEV; - - if (psp->sev_state == SEV_STATE_INIT) - return 0; - - rc = __sev_do_cmd_locked(SEV_CMD_INIT, &psp->init_cmd_buf, error); - if (rc) - return rc; - - psp->sev_state = SEV_STATE_INIT; - dev_dbg(psp->dev, "SEV firmware initialized\n"); - - return rc; -} - -int sev_platform_init(int *error) -{ - int rc; - - mutex_lock(&sev_cmd_mutex); - rc = __sev_platform_init_locked(error); - mutex_unlock(&sev_cmd_mutex); - - return rc; -} -EXPORT_SYMBOL_GPL(sev_platform_init); - -static int __sev_platform_shutdown_locked(int *error) -{ - int ret; - - ret = __sev_do_cmd_locked(SEV_CMD_SHUTDOWN, NULL, error); - if (ret) - return ret; - - psp_master->sev_state = SEV_STATE_UNINIT; - dev_dbg(psp_master->dev, "SEV firmware shutdown\n"); - - return ret; -} - -static int sev_platform_shutdown(int *error) -{ - int rc; - - mutex_lock(&sev_cmd_mutex); - rc = __sev_platform_shutdown_locked(NULL); - mutex_unlock(&sev_cmd_mutex); - - return rc; -} - -static int sev_get_platform_state(int *state, int *error) -{ - int rc; - - rc = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS, - &psp_master->status_cmd_buf, error); - if (rc) - return rc; - - *state = psp_master->status_cmd_buf.state; - return rc; -} - -static int sev_ioctl_do_reset(struct sev_issue_cmd *argp) -{ - int state, rc; - - /* - * The SEV spec requires that FACTORY_RESET must be issued in - * UNINIT state. Before we go further lets check if any guest is - * active. - * - * If FW is in WORKING state then deny the request otherwise issue - * SHUTDOWN command do INIT -> UNINIT before issuing the FACTORY_RESET. - * - */ - rc = sev_get_platform_state(&state, &argp->error); - if (rc) - return rc; - - if (state == SEV_STATE_WORKING) - return -EBUSY; - - if (state == SEV_STATE_INIT) { - rc = __sev_platform_shutdown_locked(&argp->error); - if (rc) - return rc; - } - - return __sev_do_cmd_locked(SEV_CMD_FACTORY_RESET, NULL, &argp->error); -} - -static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp) -{ - struct sev_user_data_status *data = &psp_master->status_cmd_buf; - int ret; - - ret = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS, data, &argp->error); - if (ret) - return ret; - - if (copy_to_user((void __user *)argp->data, data, sizeof(*data))) - ret = -EFAULT; - - return ret; -} - -static int sev_ioctl_do_pek_pdh_gen(int cmd, struct sev_issue_cmd *argp) -{ - int rc; - - if (psp_master->sev_state == SEV_STATE_UNINIT) { - rc = __sev_platform_init_locked(&argp->error); - if (rc) - return rc; - } - - return __sev_do_cmd_locked(cmd, NULL, &argp->error); -} - -static int sev_ioctl_do_pek_csr(struct sev_issue_cmd *argp) -{ - struct sev_user_data_pek_csr input; - struct sev_data_pek_csr *data; - void *blob = NULL; - int ret; - - if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) - return -EFAULT; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - /* userspace wants to query CSR length */ - if (!input.address || !input.length) - goto cmd; - - /* allocate a physically contiguous buffer to store the CSR blob */ - if (!access_ok(input.address, input.length) || - input.length > SEV_FW_BLOB_MAX_SIZE) { - ret = -EFAULT; - goto e_free; - } - - blob = kmalloc(input.length, GFP_KERNEL); - if (!blob) { - ret = -ENOMEM; - goto e_free; - } - - data->address = __psp_pa(blob); - data->len = input.length; - -cmd: - if (psp_master->sev_state == SEV_STATE_UNINIT) { - ret = __sev_platform_init_locked(&argp->error); - if (ret) - goto e_free_blob; - } - - ret = __sev_do_cmd_locked(SEV_CMD_PEK_CSR, data, &argp->error); - - /* If we query the CSR length, FW responded with expected data. */ - input.length = data->len; - - if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) { - ret = -EFAULT; - goto e_free_blob; - } - - if (blob) { - if (copy_to_user((void __user *)input.address, blob, input.length)) - ret = -EFAULT; - } - -e_free_blob: - kfree(blob); -e_free: - kfree(data); - return ret; -} - -void *psp_copy_user_blob(u64 __user uaddr, u32 len) -{ - if (!uaddr || !len) - return ERR_PTR(-EINVAL); - - /* verify that blob length does not exceed our limit */ - if (len > SEV_FW_BLOB_MAX_SIZE) - return ERR_PTR(-EINVAL); - - return memdup_user((void __user *)(uintptr_t)uaddr, len); -} -EXPORT_SYMBOL_GPL(psp_copy_user_blob); - -static int sev_get_api_version(void) -{ - struct sev_user_data_status *status; - int error = 0, ret; - - status = &psp_master->status_cmd_buf; - ret = sev_platform_status(status, &error); - if (ret) { - dev_err(psp_master->dev, - "SEV: failed to get status. Error: %#x\n", error); - return 1; - } - - psp_master->api_major = status->api_major; - psp_master->api_minor = status->api_minor; - psp_master->build = status->build; - psp_master->sev_state = status->state; - - return 0; -} - -static int sev_get_firmware(struct device *dev, - const struct firmware **firmware) -{ - char fw_name_specific[SEV_FW_NAME_SIZE]; - char fw_name_subset[SEV_FW_NAME_SIZE]; - - snprintf(fw_name_specific, sizeof(fw_name_specific), - "amd/amd_sev_fam%.2xh_model%.2xh.sbin", - boot_cpu_data.x86, boot_cpu_data.x86_model); - - snprintf(fw_name_subset, sizeof(fw_name_subset), - "amd/amd_sev_fam%.2xh_model%.1xxh.sbin", - boot_cpu_data.x86, (boot_cpu_data.x86_model & 0xf0) >> 4); - - /* Check for SEV FW for a particular model. - * Ex. amd_sev_fam17h_model00h.sbin for Family 17h Model 00h - * - * or - * - * Check for SEV FW common to a subset of models. - * Ex. amd_sev_fam17h_model0xh.sbin for - * Family 17h Model 00h -- Family 17h Model 0Fh - * - * or - * - * Fall-back to using generic name: sev.fw - */ - if ((firmware_request_nowarn(firmware, fw_name_specific, dev) >= 0) || - (firmware_request_nowarn(firmware, fw_name_subset, dev) >= 0) || - (firmware_request_nowarn(firmware, SEV_FW_FILE, dev) >= 0)) - return 0; - - return -ENOENT; -} - -/* Don't fail if SEV FW couldn't be updated. Continue with existing SEV FW */ -static int sev_update_firmware(struct device *dev) -{ - struct sev_data_download_firmware *data; - const struct firmware *firmware; - int ret, error, order; - struct page *p; - u64 data_size; - - if (sev_get_firmware(dev, &firmware) == -ENOENT) { - dev_dbg(dev, "No SEV firmware file present\n"); - return -1; - } - - /* - * SEV FW expects the physical address given to it to be 32 - * byte aligned. Memory allocated has structure placed at the - * beginning followed by the firmware being passed to the SEV - * FW. Allocate enough memory for data structure + alignment - * padding + SEV FW. - */ - data_size = ALIGN(sizeof(struct sev_data_download_firmware), 32); - - order = get_order(firmware->size + data_size); - p = alloc_pages(GFP_KERNEL, order); - if (!p) { - ret = -1; - goto fw_err; - } - - /* - * Copy firmware data to a kernel allocated contiguous - * memory region. - */ - data = page_address(p); - memcpy(page_address(p) + data_size, firmware->data, firmware->size); - - data->address = __psp_pa(page_address(p) + data_size); - data->len = firmware->size; - - ret = sev_do_cmd(SEV_CMD_DOWNLOAD_FIRMWARE, data, &error); - if (ret) - dev_dbg(dev, "Failed to update SEV firmware: %#x\n", error); - else - dev_info(dev, "SEV firmware update successful\n"); - - __free_pages(p, order); - -fw_err: - release_firmware(firmware); - - return ret; -} - -static int sev_ioctl_do_pek_import(struct sev_issue_cmd *argp) -{ - struct sev_user_data_pek_cert_import input; - struct sev_data_pek_cert_import *data; - void *pek_blob, *oca_blob; - int ret; - - if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) - return -EFAULT; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - /* copy PEK certificate blobs from userspace */ - pek_blob = psp_copy_user_blob(input.pek_cert_address, input.pek_cert_len); - if (IS_ERR(pek_blob)) { - ret = PTR_ERR(pek_blob); - goto e_free; - } - - data->pek_cert_address = __psp_pa(pek_blob); - data->pek_cert_len = input.pek_cert_len; - - /* copy PEK certificate blobs from userspace */ - oca_blob = psp_copy_user_blob(input.oca_cert_address, input.oca_cert_len); - if (IS_ERR(oca_blob)) { - ret = PTR_ERR(oca_blob); - goto e_free_pek; - } - - data->oca_cert_address = __psp_pa(oca_blob); - data->oca_cert_len = input.oca_cert_len; - - /* If platform is not in INIT state then transition it to INIT */ - if (psp_master->sev_state != SEV_STATE_INIT) { - ret = __sev_platform_init_locked(&argp->error); - if (ret) - goto e_free_oca; - } - - ret = __sev_do_cmd_locked(SEV_CMD_PEK_CERT_IMPORT, data, &argp->error); - -e_free_oca: - kfree(oca_blob); -e_free_pek: - kfree(pek_blob); -e_free: - kfree(data); - return ret; -} - -static int sev_ioctl_do_get_id2(struct sev_issue_cmd *argp) -{ - struct sev_user_data_get_id2 input; - struct sev_data_get_id *data; - void *id_blob = NULL; - int ret; - - /* SEV GET_ID is available from SEV API v0.16 and up */ - if (!sev_version_greater_or_equal(0, 16)) - return -ENOTSUPP; - - if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) - return -EFAULT; - - /* Check if we have write access to the userspace buffer */ - if (input.address && - input.length && - !access_ok(input.address, input.length)) - return -EFAULT; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - if (input.address && input.length) { - id_blob = kmalloc(input.length, GFP_KERNEL); - if (!id_blob) { - kfree(data); - return -ENOMEM; - } - - data->address = __psp_pa(id_blob); - data->len = input.length; - } - - ret = __sev_do_cmd_locked(SEV_CMD_GET_ID, data, &argp->error); - - /* - * Firmware will return the length of the ID value (either the minimum - * required length or the actual length written), return it to the user. - */ - input.length = data->len; - - if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) { - ret = -EFAULT; - goto e_free; - } - - if (id_blob) { - if (copy_to_user((void __user *)input.address, - id_blob, data->len)) { - ret = -EFAULT; - goto e_free; - } - } - -e_free: - kfree(id_blob); - kfree(data); - - return ret; -} - -static int sev_ioctl_do_get_id(struct sev_issue_cmd *argp) -{ - struct sev_data_get_id *data; - u64 data_size, user_size; - void *id_blob, *mem; - int ret; - - /* SEV GET_ID available from SEV API v0.16 and up */ - if (!sev_version_greater_or_equal(0, 16)) - return -ENOTSUPP; - - /* SEV FW expects the buffer it fills with the ID to be - * 8-byte aligned. Memory allocated should be enough to - * hold data structure + alignment padding + memory - * where SEV FW writes the ID. - */ - data_size = ALIGN(sizeof(struct sev_data_get_id), 8); - user_size = sizeof(struct sev_user_data_get_id); - - mem = kzalloc(data_size + user_size, GFP_KERNEL); - if (!mem) - return -ENOMEM; - - data = mem; - id_blob = mem + data_size; - - data->address = __psp_pa(id_blob); - data->len = user_size; - - ret = __sev_do_cmd_locked(SEV_CMD_GET_ID, data, &argp->error); - if (!ret) { - if (copy_to_user((void __user *)argp->data, id_blob, data->len)) - ret = -EFAULT; - } - - kfree(mem); - - return ret; -} - -static int sev_ioctl_do_pdh_export(struct sev_issue_cmd *argp) -{ - struct sev_user_data_pdh_cert_export input; - void *pdh_blob = NULL, *cert_blob = NULL; - struct sev_data_pdh_cert_export *data; - int ret; - - if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) - return -EFAULT; - - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - /* Userspace wants to query the certificate length. */ - if (!input.pdh_cert_address || - !input.pdh_cert_len || - !input.cert_chain_address) - goto cmd; - - /* Allocate a physically contiguous buffer to store the PDH blob. */ - if ((input.pdh_cert_len > SEV_FW_BLOB_MAX_SIZE) || - !access_ok(input.pdh_cert_address, input.pdh_cert_len)) { - ret = -EFAULT; - goto e_free; - } - - /* Allocate a physically contiguous buffer to store the cert chain blob. */ - if ((input.cert_chain_len > SEV_FW_BLOB_MAX_SIZE) || - !access_ok(input.cert_chain_address, input.cert_chain_len)) { - ret = -EFAULT; - goto e_free; - } - - pdh_blob = kmalloc(input.pdh_cert_len, GFP_KERNEL); - if (!pdh_blob) { - ret = -ENOMEM; - goto e_free; - } - - data->pdh_cert_address = __psp_pa(pdh_blob); - data->pdh_cert_len = input.pdh_cert_len; - - cert_blob = kmalloc(input.cert_chain_len, GFP_KERNEL); - if (!cert_blob) { - ret = -ENOMEM; - goto e_free_pdh; - } - - data->cert_chain_address = __psp_pa(cert_blob); - data->cert_chain_len = input.cert_chain_len; - -cmd: - /* If platform is not in INIT state then transition it to INIT. */ - if (psp_master->sev_state != SEV_STATE_INIT) { - ret = __sev_platform_init_locked(&argp->error); - if (ret) - goto e_free_cert; - } - - ret = __sev_do_cmd_locked(SEV_CMD_PDH_CERT_EXPORT, data, &argp->error); - - /* If we query the length, FW responded with expected data. */ - input.cert_chain_len = data->cert_chain_len; - input.pdh_cert_len = data->pdh_cert_len; - - if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) { - ret = -EFAULT; - goto e_free_cert; - } - - if (pdh_blob) { - if (copy_to_user((void __user *)input.pdh_cert_address, - pdh_blob, input.pdh_cert_len)) { - ret = -EFAULT; - goto e_free_cert; - } - } - - if (cert_blob) { - if (copy_to_user((void __user *)input.cert_chain_address, - cert_blob, input.cert_chain_len)) - ret = -EFAULT; - } - -e_free_cert: - kfree(cert_blob); -e_free_pdh: - kfree(pdh_blob); -e_free: - kfree(data); - return ret; -} - -static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) -{ - void __user *argp = (void __user *)arg; - struct sev_issue_cmd input; - int ret = -EFAULT; - - if (!psp_master) - return -ENODEV; - - if (ioctl != SEV_ISSUE_CMD) - return -EINVAL; - - if (copy_from_user(&input, argp, sizeof(struct sev_issue_cmd))) - return -EFAULT; - - if (input.cmd > SEV_MAX) - return -EINVAL; - - mutex_lock(&sev_cmd_mutex); - - switch (input.cmd) { - - case SEV_FACTORY_RESET: - ret = sev_ioctl_do_reset(&input); - break; - case SEV_PLATFORM_STATUS: - ret = sev_ioctl_do_platform_status(&input); - break; - case SEV_PEK_GEN: - ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PEK_GEN, &input); - break; - case SEV_PDH_GEN: - ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PDH_GEN, &input); - break; - case SEV_PEK_CSR: - ret = sev_ioctl_do_pek_csr(&input); - break; - case SEV_PEK_CERT_IMPORT: - ret = sev_ioctl_do_pek_import(&input); - break; - case SEV_PDH_CERT_EXPORT: - ret = sev_ioctl_do_pdh_export(&input); - break; - case SEV_GET_ID: - pr_warn_once("SEV_GET_ID command is deprecated, use SEV_GET_ID2\n"); - ret = sev_ioctl_do_get_id(&input); - break; - case SEV_GET_ID2: - ret = sev_ioctl_do_get_id2(&input); - break; - default: - ret = -EINVAL; - goto out; - } - - if (copy_to_user(argp, &input, sizeof(struct sev_issue_cmd))) - ret = -EFAULT; -out: - mutex_unlock(&sev_cmd_mutex); - - return ret; -} - -static const struct file_operations sev_fops = { - .owner = THIS_MODULE, - .unlocked_ioctl = sev_ioctl, -}; - -int sev_platform_status(struct sev_user_data_status *data, int *error) -{ - return sev_do_cmd(SEV_CMD_PLATFORM_STATUS, data, error); -} -EXPORT_SYMBOL_GPL(sev_platform_status); - -int sev_guest_deactivate(struct sev_data_deactivate *data, int *error) -{ - return sev_do_cmd(SEV_CMD_DEACTIVATE, data, error); -} -EXPORT_SYMBOL_GPL(sev_guest_deactivate); - -int sev_guest_activate(struct sev_data_activate *data, int *error) -{ - return sev_do_cmd(SEV_CMD_ACTIVATE, data, error); -} -EXPORT_SYMBOL_GPL(sev_guest_activate); - -int sev_guest_decommission(struct sev_data_decommission *data, int *error) -{ - return sev_do_cmd(SEV_CMD_DECOMMISSION, data, error); -} -EXPORT_SYMBOL_GPL(sev_guest_decommission); - -int sev_guest_df_flush(int *error) -{ - return sev_do_cmd(SEV_CMD_DF_FLUSH, NULL, error); -} -EXPORT_SYMBOL_GPL(sev_guest_df_flush); - -static void sev_exit(struct kref *ref) -{ - struct sev_misc_dev *misc_dev = container_of(ref, struct sev_misc_dev, refcount); - - misc_deregister(&misc_dev->misc); -} - -static int sev_misc_init(struct psp_device *psp) -{ - struct device *dev = psp->dev; - int ret; - - /* - * SEV feature support can be detected on multiple devices but the SEV - * FW commands must be issued on the master. During probe, we do not - * know the master hence we create /dev/sev on the first device probe. - * sev_do_cmd() finds the right master device to which to issue the - * command to the firmware. - */ - if (!misc_dev) { - struct miscdevice *misc; - - misc_dev = devm_kzalloc(dev, sizeof(*misc_dev), GFP_KERNEL); - if (!misc_dev) - return -ENOMEM; - - misc = &misc_dev->misc; - misc->minor = MISC_DYNAMIC_MINOR; - misc->name = DEVICE_NAME; - misc->fops = &sev_fops; - - ret = misc_register(misc); - if (ret) - return ret; - - kref_init(&misc_dev->refcount); - } else { - kref_get(&misc_dev->refcount); - } - - init_waitqueue_head(&psp->sev_int_queue); - psp->sev_misc = misc_dev; - dev_dbg(dev, "registered SEV device\n"); - - return 0; -} - -static int psp_check_sev_support(struct psp_device *psp) -{ - /* Check if device supports SEV feature */ - if (!(ioread32(psp->io_regs + psp->vdata->feature_reg) & 1)) { - dev_dbg(psp->dev, "psp does not support SEV\n"); - return -ENODEV; - } - - return 0; -} - -int psp_dev_init(struct sp_device *sp) -{ - struct device *dev = sp->dev; - struct psp_device *psp; - int ret; - - ret = -ENOMEM; - psp = psp_alloc_struct(sp); - if (!psp) - goto e_err; - - sp->psp_data = psp; - - psp->vdata = (struct psp_vdata *)sp->dev_vdata->psp_vdata; - if (!psp->vdata) { - ret = -ENODEV; - dev_err(dev, "missing driver data\n"); - goto e_err; - } - - psp->io_regs = sp->io_map; - - ret = psp_check_sev_support(psp); - if (ret) - goto e_disable; - - /* Disable and clear interrupts until ready */ - iowrite32(0, psp->io_regs + psp->vdata->inten_reg); - iowrite32(-1, psp->io_regs + psp->vdata->intsts_reg); - - /* Request an irq */ - ret = sp_request_psp_irq(psp->sp, psp_irq_handler, psp->name, psp); - if (ret) { - dev_err(dev, "psp: unable to allocate an IRQ\n"); - goto e_err; - } - - ret = sev_misc_init(psp); - if (ret) - goto e_irq; - - if (sp->set_psp_master_device) - sp->set_psp_master_device(sp); - - /* Enable interrupt */ - iowrite32(-1, psp->io_regs + psp->vdata->inten_reg); - - dev_notice(dev, "psp enabled\n"); - - return 0; - -e_irq: - sp_free_psp_irq(psp->sp, psp); -e_err: - sp->psp_data = NULL; - - dev_notice(dev, "psp initialization failed\n"); - - return ret; - -e_disable: - sp->psp_data = NULL; - - return ret; -} - -void psp_dev_destroy(struct sp_device *sp) -{ - struct psp_device *psp = sp->psp_data; - - if (!psp) - return; - - if (psp->sev_misc) - kref_put(&misc_dev->refcount, sev_exit); - - sp_free_psp_irq(sp, psp); -} - -int sev_issue_cmd_external_user(struct file *filep, unsigned int cmd, - void *data, int *error) -{ - if (!filep || filep->f_op != &sev_fops) - return -EBADF; - - return sev_do_cmd(cmd, data, error); -} -EXPORT_SYMBOL_GPL(sev_issue_cmd_external_user); - -void psp_pci_init(void) -{ - struct sp_device *sp; - int error, rc; - - sp = sp_get_psp_master_device(); - if (!sp) - return; - - psp_master = sp->psp_data; - - psp_timeout = psp_probe_timeout; - - if (sev_get_api_version()) - goto err; - - /* - * If platform is not in UNINIT state then firmware upgrade and/or - * platform INIT command will fail. These command require UNINIT state. - * - * In a normal boot we should never run into case where the firmware - * is not in UNINIT state on boot. But in case of kexec boot, a reboot - * may not go through a typical shutdown sequence and may leave the - * firmware in INIT or WORKING state. - */ - - if (psp_master->sev_state != SEV_STATE_UNINIT) { - sev_platform_shutdown(NULL); - psp_master->sev_state = SEV_STATE_UNINIT; - } - - if (sev_version_greater_or_equal(0, 15) && - sev_update_firmware(psp_master->dev) == 0) - sev_get_api_version(); - - /* Initialize the platform */ - rc = sev_platform_init(&error); - if (rc) { - dev_err(sp->dev, "SEV: failed to INIT error %#x\n", error); - return; - } - - dev_info(sp->dev, "SEV API:%d.%d build:%d\n", psp_master->api_major, - psp_master->api_minor, psp_master->build); - - return; - -err: - psp_master = NULL; -} - -void psp_pci_exit(void) -{ - if (!psp_master) - return; - - sev_platform_shutdown(NULL); -} diff --git a/drivers/crypto/ccp/psp-dev.h b/drivers/crypto/ccp/psp-dev.h deleted file mode 100644 index 82a084f..0000000 --- a/drivers/crypto/ccp/psp-dev.h +++ /dev/null @@ -1,66 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * AMD Platform Security Processor (PSP) interface driver - * - * Copyright (C) 2017-2018 Advanced Micro Devices, Inc. - * - * Author: Brijesh Singh - */ - -#ifndef __PSP_DEV_H__ -#define __PSP_DEV_H__ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "sp-dev.h" - -#define PSP_CMD_COMPLETE BIT(1) - -#define PSP_CMDRESP_CMD_SHIFT 16 -#define PSP_CMDRESP_IOC BIT(0) -#define PSP_CMDRESP_RESP BIT(31) -#define PSP_CMDRESP_ERR_MASK 0xffff - -#define MAX_PSP_NAME_LEN 16 - -struct sev_misc_dev { - struct kref refcount; - struct miscdevice misc; -}; - -struct psp_device { - struct list_head entry; - - struct psp_vdata *vdata; - char name[MAX_PSP_NAME_LEN]; - - struct device *dev; - struct sp_device *sp; - - void __iomem *io_regs; - - int sev_state; - unsigned int sev_int_rcvd; - wait_queue_head_t sev_int_queue; - struct sev_misc_dev *sev_misc; - struct sev_user_data_status status_cmd_buf; - struct sev_data_init init_cmd_buf; - - u8 api_major; - u8 api_minor; - u8 build; -}; - -#endif /* __PSP_DEV_H */ diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c new file mode 100644 index 0000000..77841a8 --- /dev/null +++ b/drivers/crypto/ccp/sev-dev.c @@ -0,0 +1,1087 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * AMD Secure Encrypted Virtualization (SEV) interface + * + * Copyright (C) 2016,2019 Advanced Micro Devices, Inc. + * + * Author: Brijesh Singh + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sp-dev.h" +#include "sev-dev.h" + +#define DEVICE_NAME "sev" +#define SEV_FW_FILE "amd/sev.fw" +#define SEV_FW_NAME_SIZE 64 + +static DEFINE_MUTEX(sev_cmd_mutex); +static struct sev_misc_dev *misc_dev; +static struct psp_device *psp_master; + +static int psp_cmd_timeout = 100; +module_param(psp_cmd_timeout, int, 0644); +MODULE_PARM_DESC(psp_cmd_timeout, " default timeout value, in seconds, for PSP commands"); + +static int psp_probe_timeout = 5; +module_param(psp_probe_timeout, int, 0644); +MODULE_PARM_DESC(psp_probe_timeout, " default timeout value, in seconds, during PSP device probe"); + +static bool psp_dead; +static int psp_timeout; + +static inline bool sev_version_greater_or_equal(u8 maj, u8 min) +{ + if (psp_master->api_major > maj) + return true; + if (psp_master->api_major == maj && psp_master->api_minor >= min) + return true; + return false; +} + +static struct psp_device *psp_alloc_struct(struct sp_device *sp) +{ + struct device *dev = sp->dev; + struct psp_device *psp; + + psp = devm_kzalloc(dev, sizeof(*psp), GFP_KERNEL); + if (!psp) + return NULL; + + psp->dev = dev; + psp->sp = sp; + + snprintf(psp->name, sizeof(psp->name), "psp-%u", sp->ord); + + return psp; +} + +static irqreturn_t psp_irq_handler(int irq, void *data) +{ + struct psp_device *psp = data; + unsigned int status; + int reg; + + /* Read the interrupt status: */ + status = ioread32(psp->io_regs + psp->vdata->intsts_reg); + + /* Check if it is command completion: */ + if (!(status & PSP_CMD_COMPLETE)) + goto done; + + /* Check if it is SEV command completion: */ + reg = ioread32(psp->io_regs + psp->vdata->cmdresp_reg); + if (reg & PSP_CMDRESP_RESP) { + psp->sev_int_rcvd = 1; + wake_up(&psp->sev_int_queue); + } + +done: + /* Clear the interrupt status by writing the same value we read. */ + iowrite32(status, psp->io_regs + psp->vdata->intsts_reg); + + return IRQ_HANDLED; +} + +static int sev_wait_cmd_ioc(struct psp_device *psp, + unsigned int *reg, unsigned int timeout) +{ + int ret; + + ret = wait_event_timeout(psp->sev_int_queue, + psp->sev_int_rcvd, timeout * HZ); + if (!ret) + return -ETIMEDOUT; + + *reg = ioread32(psp->io_regs + psp->vdata->cmdresp_reg); + + return 0; +} + +static int sev_cmd_buffer_len(int cmd) +{ + switch (cmd) { + case SEV_CMD_INIT: return sizeof(struct sev_data_init); + case SEV_CMD_PLATFORM_STATUS: return sizeof(struct sev_user_data_status); + case SEV_CMD_PEK_CSR: return sizeof(struct sev_data_pek_csr); + case SEV_CMD_PEK_CERT_IMPORT: return sizeof(struct sev_data_pek_cert_import); + case SEV_CMD_PDH_CERT_EXPORT: return sizeof(struct sev_data_pdh_cert_export); + case SEV_CMD_LAUNCH_START: return sizeof(struct sev_data_launch_start); + case SEV_CMD_LAUNCH_UPDATE_DATA: return sizeof(struct sev_data_launch_update_data); + case SEV_CMD_LAUNCH_UPDATE_VMSA: return sizeof(struct sev_data_launch_update_vmsa); + case SEV_CMD_LAUNCH_FINISH: return sizeof(struct sev_data_launch_finish); + case SEV_CMD_LAUNCH_MEASURE: return sizeof(struct sev_data_launch_measure); + case SEV_CMD_ACTIVATE: return sizeof(struct sev_data_activate); + case SEV_CMD_DEACTIVATE: return sizeof(struct sev_data_deactivate); + case SEV_CMD_DECOMMISSION: return sizeof(struct sev_data_decommission); + case SEV_CMD_GUEST_STATUS: return sizeof(struct sev_data_guest_status); + case SEV_CMD_DBG_DECRYPT: return sizeof(struct sev_data_dbg); + case SEV_CMD_DBG_ENCRYPT: return sizeof(struct sev_data_dbg); + case SEV_CMD_SEND_START: return sizeof(struct sev_data_send_start); + case SEV_CMD_SEND_UPDATE_DATA: return sizeof(struct sev_data_send_update_data); + case SEV_CMD_SEND_UPDATE_VMSA: return sizeof(struct sev_data_send_update_vmsa); + case SEV_CMD_SEND_FINISH: return sizeof(struct sev_data_send_finish); + case SEV_CMD_RECEIVE_START: return sizeof(struct sev_data_receive_start); + case SEV_CMD_RECEIVE_FINISH: return sizeof(struct sev_data_receive_finish); + case SEV_CMD_RECEIVE_UPDATE_DATA: return sizeof(struct sev_data_receive_update_data); + case SEV_CMD_RECEIVE_UPDATE_VMSA: return sizeof(struct sev_data_receive_update_vmsa); + case SEV_CMD_LAUNCH_UPDATE_SECRET: return sizeof(struct sev_data_launch_secret); + case SEV_CMD_DOWNLOAD_FIRMWARE: return sizeof(struct sev_data_download_firmware); + case SEV_CMD_GET_ID: return sizeof(struct sev_data_get_id); + default: return 0; + } + + return 0; +} + +static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret) +{ + struct psp_device *psp = psp_master; + unsigned int phys_lsb, phys_msb; + unsigned int reg, ret = 0; + + if (!psp) + return -ENODEV; + + if (psp_dead) + return -EBUSY; + + /* Get the physical address of the command buffer */ + phys_lsb = data ? lower_32_bits(__psp_pa(data)) : 0; + phys_msb = data ? upper_32_bits(__psp_pa(data)) : 0; + + dev_dbg(psp->dev, "sev command id %#x buffer 0x%08x%08x timeout %us\n", + cmd, phys_msb, phys_lsb, psp_timeout); + + print_hex_dump_debug("(in): ", DUMP_PREFIX_OFFSET, 16, 2, data, + sev_cmd_buffer_len(cmd), false); + + iowrite32(phys_lsb, psp->io_regs + psp->vdata->cmdbuff_addr_lo_reg); + iowrite32(phys_msb, psp->io_regs + psp->vdata->cmdbuff_addr_hi_reg); + + psp->sev_int_rcvd = 0; + + reg = cmd; + reg <<= PSP_CMDRESP_CMD_SHIFT; + reg |= PSP_CMDRESP_IOC; + iowrite32(reg, psp->io_regs + psp->vdata->cmdresp_reg); + + /* wait for command completion */ + ret = sev_wait_cmd_ioc(psp, ®, psp_timeout); + if (ret) { + if (psp_ret) + *psp_ret = 0; + + dev_err(psp->dev, "sev command %#x timed out, disabling PSP \n", cmd); + psp_dead = true; + + return ret; + } + + psp_timeout = psp_cmd_timeout; + + if (psp_ret) + *psp_ret = reg & PSP_CMDRESP_ERR_MASK; + + if (reg & PSP_CMDRESP_ERR_MASK) { + dev_dbg(psp->dev, "sev command %#x failed (%#010x)\n", + cmd, reg & PSP_CMDRESP_ERR_MASK); + ret = -EIO; + } + + print_hex_dump_debug("(out): ", DUMP_PREFIX_OFFSET, 16, 2, data, + sev_cmd_buffer_len(cmd), false); + + return ret; +} + +static int sev_do_cmd(int cmd, void *data, int *psp_ret) +{ + int rc; + + mutex_lock(&sev_cmd_mutex); + rc = __sev_do_cmd_locked(cmd, data, psp_ret); + mutex_unlock(&sev_cmd_mutex); + + return rc; +} + +static int __sev_platform_init_locked(int *error) +{ + struct psp_device *psp = psp_master; + int rc = 0; + + if (!psp) + return -ENODEV; + + if (psp->sev_state == SEV_STATE_INIT) + return 0; + + rc = __sev_do_cmd_locked(SEV_CMD_INIT, &psp->init_cmd_buf, error); + if (rc) + return rc; + + psp->sev_state = SEV_STATE_INIT; + dev_dbg(psp->dev, "SEV firmware initialized\n"); + + return rc; +} + +int sev_platform_init(int *error) +{ + int rc; + + mutex_lock(&sev_cmd_mutex); + rc = __sev_platform_init_locked(error); + mutex_unlock(&sev_cmd_mutex); + + return rc; +} +EXPORT_SYMBOL_GPL(sev_platform_init); + +static int __sev_platform_shutdown_locked(int *error) +{ + int ret; + + ret = __sev_do_cmd_locked(SEV_CMD_SHUTDOWN, NULL, error); + if (ret) + return ret; + + psp_master->sev_state = SEV_STATE_UNINIT; + dev_dbg(psp_master->dev, "SEV firmware shutdown\n"); + + return ret; +} + +static int sev_platform_shutdown(int *error) +{ + int rc; + + mutex_lock(&sev_cmd_mutex); + rc = __sev_platform_shutdown_locked(NULL); + mutex_unlock(&sev_cmd_mutex); + + return rc; +} + +static int sev_get_platform_state(int *state, int *error) +{ + int rc; + + rc = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS, + &psp_master->status_cmd_buf, error); + if (rc) + return rc; + + *state = psp_master->status_cmd_buf.state; + return rc; +} + +static int sev_ioctl_do_reset(struct sev_issue_cmd *argp) +{ + int state, rc; + + /* + * The SEV spec requires that FACTORY_RESET must be issued in + * UNINIT state. Before we go further lets check if any guest is + * active. + * + * If FW is in WORKING state then deny the request otherwise issue + * SHUTDOWN command do INIT -> UNINIT before issuing the FACTORY_RESET. + * + */ + rc = sev_get_platform_state(&state, &argp->error); + if (rc) + return rc; + + if (state == SEV_STATE_WORKING) + return -EBUSY; + + if (state == SEV_STATE_INIT) { + rc = __sev_platform_shutdown_locked(&argp->error); + if (rc) + return rc; + } + + return __sev_do_cmd_locked(SEV_CMD_FACTORY_RESET, NULL, &argp->error); +} + +static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp) +{ + struct sev_user_data_status *data = &psp_master->status_cmd_buf; + int ret; + + ret = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS, data, &argp->error); + if (ret) + return ret; + + if (copy_to_user((void __user *)argp->data, data, sizeof(*data))) + ret = -EFAULT; + + return ret; +} + +static int sev_ioctl_do_pek_pdh_gen(int cmd, struct sev_issue_cmd *argp) +{ + int rc; + + if (psp_master->sev_state == SEV_STATE_UNINIT) { + rc = __sev_platform_init_locked(&argp->error); + if (rc) + return rc; + } + + return __sev_do_cmd_locked(cmd, NULL, &argp->error); +} + +static int sev_ioctl_do_pek_csr(struct sev_issue_cmd *argp) +{ + struct sev_user_data_pek_csr input; + struct sev_data_pek_csr *data; + void *blob = NULL; + int ret; + + if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) + return -EFAULT; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + /* userspace wants to query CSR length */ + if (!input.address || !input.length) + goto cmd; + + /* allocate a physically contiguous buffer to store the CSR blob */ + if (!access_ok(input.address, input.length) || + input.length > SEV_FW_BLOB_MAX_SIZE) { + ret = -EFAULT; + goto e_free; + } + + blob = kmalloc(input.length, GFP_KERNEL); + if (!blob) { + ret = -ENOMEM; + goto e_free; + } + + data->address = __psp_pa(blob); + data->len = input.length; + +cmd: + if (psp_master->sev_state == SEV_STATE_UNINIT) { + ret = __sev_platform_init_locked(&argp->error); + if (ret) + goto e_free_blob; + } + + ret = __sev_do_cmd_locked(SEV_CMD_PEK_CSR, data, &argp->error); + + /* If we query the CSR length, FW responded with expected data. */ + input.length = data->len; + + if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) { + ret = -EFAULT; + goto e_free_blob; + } + + if (blob) { + if (copy_to_user((void __user *)input.address, blob, input.length)) + ret = -EFAULT; + } + +e_free_blob: + kfree(blob); +e_free: + kfree(data); + return ret; +} + +void *psp_copy_user_blob(u64 __user uaddr, u32 len) +{ + if (!uaddr || !len) + return ERR_PTR(-EINVAL); + + /* verify that blob length does not exceed our limit */ + if (len > SEV_FW_BLOB_MAX_SIZE) + return ERR_PTR(-EINVAL); + + return memdup_user((void __user *)(uintptr_t)uaddr, len); +} +EXPORT_SYMBOL_GPL(psp_copy_user_blob); + +static int sev_get_api_version(void) +{ + struct sev_user_data_status *status; + int error = 0, ret; + + status = &psp_master->status_cmd_buf; + ret = sev_platform_status(status, &error); + if (ret) { + dev_err(psp_master->dev, + "SEV: failed to get status. Error: %#x\n", error); + return 1; + } + + psp_master->api_major = status->api_major; + psp_master->api_minor = status->api_minor; + psp_master->build = status->build; + psp_master->sev_state = status->state; + + return 0; +} + +static int sev_get_firmware(struct device *dev, + const struct firmware **firmware) +{ + char fw_name_specific[SEV_FW_NAME_SIZE]; + char fw_name_subset[SEV_FW_NAME_SIZE]; + + snprintf(fw_name_specific, sizeof(fw_name_specific), + "amd/amd_sev_fam%.2xh_model%.2xh.sbin", + boot_cpu_data.x86, boot_cpu_data.x86_model); + + snprintf(fw_name_subset, sizeof(fw_name_subset), + "amd/amd_sev_fam%.2xh_model%.1xxh.sbin", + boot_cpu_data.x86, (boot_cpu_data.x86_model & 0xf0) >> 4); + + /* Check for SEV FW for a particular model. + * Ex. amd_sev_fam17h_model00h.sbin for Family 17h Model 00h + * + * or + * + * Check for SEV FW common to a subset of models. + * Ex. amd_sev_fam17h_model0xh.sbin for + * Family 17h Model 00h -- Family 17h Model 0Fh + * + * or + * + * Fall-back to using generic name: sev.fw + */ + if ((firmware_request_nowarn(firmware, fw_name_specific, dev) >= 0) || + (firmware_request_nowarn(firmware, fw_name_subset, dev) >= 0) || + (firmware_request_nowarn(firmware, SEV_FW_FILE, dev) >= 0)) + return 0; + + return -ENOENT; +} + +/* Don't fail if SEV FW couldn't be updated. Continue with existing SEV FW */ +static int sev_update_firmware(struct device *dev) +{ + struct sev_data_download_firmware *data; + const struct firmware *firmware; + int ret, error, order; + struct page *p; + u64 data_size; + + if (sev_get_firmware(dev, &firmware) == -ENOENT) { + dev_dbg(dev, "No SEV firmware file present\n"); + return -1; + } + + /* + * SEV FW expects the physical address given to it to be 32 + * byte aligned. Memory allocated has structure placed at the + * beginning followed by the firmware being passed to the SEV + * FW. Allocate enough memory for data structure + alignment + * padding + SEV FW. + */ + data_size = ALIGN(sizeof(struct sev_data_download_firmware), 32); + + order = get_order(firmware->size + data_size); + p = alloc_pages(GFP_KERNEL, order); + if (!p) { + ret = -1; + goto fw_err; + } + + /* + * Copy firmware data to a kernel allocated contiguous + * memory region. + */ + data = page_address(p); + memcpy(page_address(p) + data_size, firmware->data, firmware->size); + + data->address = __psp_pa(page_address(p) + data_size); + data->len = firmware->size; + + ret = sev_do_cmd(SEV_CMD_DOWNLOAD_FIRMWARE, data, &error); + if (ret) + dev_dbg(dev, "Failed to update SEV firmware: %#x\n", error); + else + dev_info(dev, "SEV firmware update successful\n"); + + __free_pages(p, order); + +fw_err: + release_firmware(firmware); + + return ret; +} + +static int sev_ioctl_do_pek_import(struct sev_issue_cmd *argp) +{ + struct sev_user_data_pek_cert_import input; + struct sev_data_pek_cert_import *data; + void *pek_blob, *oca_blob; + int ret; + + if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) + return -EFAULT; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + /* copy PEK certificate blobs from userspace */ + pek_blob = psp_copy_user_blob(input.pek_cert_address, input.pek_cert_len); + if (IS_ERR(pek_blob)) { + ret = PTR_ERR(pek_blob); + goto e_free; + } + + data->pek_cert_address = __psp_pa(pek_blob); + data->pek_cert_len = input.pek_cert_len; + + /* copy PEK certificate blobs from userspace */ + oca_blob = psp_copy_user_blob(input.oca_cert_address, input.oca_cert_len); + if (IS_ERR(oca_blob)) { + ret = PTR_ERR(oca_blob); + goto e_free_pek; + } + + data->oca_cert_address = __psp_pa(oca_blob); + data->oca_cert_len = input.oca_cert_len; + + /* If platform is not in INIT state then transition it to INIT */ + if (psp_master->sev_state != SEV_STATE_INIT) { + ret = __sev_platform_init_locked(&argp->error); + if (ret) + goto e_free_oca; + } + + ret = __sev_do_cmd_locked(SEV_CMD_PEK_CERT_IMPORT, data, &argp->error); + +e_free_oca: + kfree(oca_blob); +e_free_pek: + kfree(pek_blob); +e_free: + kfree(data); + return ret; +} + +static int sev_ioctl_do_get_id2(struct sev_issue_cmd *argp) +{ + struct sev_user_data_get_id2 input; + struct sev_data_get_id *data; + void *id_blob = NULL; + int ret; + + /* SEV GET_ID is available from SEV API v0.16 and up */ + if (!sev_version_greater_or_equal(0, 16)) + return -ENOTSUPP; + + if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) + return -EFAULT; + + /* Check if we have write access to the userspace buffer */ + if (input.address && + input.length && + !access_ok(input.address, input.length)) + return -EFAULT; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + if (input.address && input.length) { + id_blob = kmalloc(input.length, GFP_KERNEL); + if (!id_blob) { + kfree(data); + return -ENOMEM; + } + + data->address = __psp_pa(id_blob); + data->len = input.length; + } + + ret = __sev_do_cmd_locked(SEV_CMD_GET_ID, data, &argp->error); + + /* + * Firmware will return the length of the ID value (either the minimum + * required length or the actual length written), return it to the user. + */ + input.length = data->len; + + if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) { + ret = -EFAULT; + goto e_free; + } + + if (id_blob) { + if (copy_to_user((void __user *)input.address, + id_blob, data->len)) { + ret = -EFAULT; + goto e_free; + } + } + +e_free: + kfree(id_blob); + kfree(data); + + return ret; +} + +static int sev_ioctl_do_get_id(struct sev_issue_cmd *argp) +{ + struct sev_data_get_id *data; + u64 data_size, user_size; + void *id_blob, *mem; + int ret; + + /* SEV GET_ID available from SEV API v0.16 and up */ + if (!sev_version_greater_or_equal(0, 16)) + return -ENOTSUPP; + + /* SEV FW expects the buffer it fills with the ID to be + * 8-byte aligned. Memory allocated should be enough to + * hold data structure + alignment padding + memory + * where SEV FW writes the ID. + */ + data_size = ALIGN(sizeof(struct sev_data_get_id), 8); + user_size = sizeof(struct sev_user_data_get_id); + + mem = kzalloc(data_size + user_size, GFP_KERNEL); + if (!mem) + return -ENOMEM; + + data = mem; + id_blob = mem + data_size; + + data->address = __psp_pa(id_blob); + data->len = user_size; + + ret = __sev_do_cmd_locked(SEV_CMD_GET_ID, data, &argp->error); + if (!ret) { + if (copy_to_user((void __user *)argp->data, id_blob, data->len)) + ret = -EFAULT; + } + + kfree(mem); + + return ret; +} + +static int sev_ioctl_do_pdh_export(struct sev_issue_cmd *argp) +{ + struct sev_user_data_pdh_cert_export input; + void *pdh_blob = NULL, *cert_blob = NULL; + struct sev_data_pdh_cert_export *data; + int ret; + + if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) + return -EFAULT; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + /* Userspace wants to query the certificate length. */ + if (!input.pdh_cert_address || + !input.pdh_cert_len || + !input.cert_chain_address) + goto cmd; + + /* Allocate a physically contiguous buffer to store the PDH blob. */ + if ((input.pdh_cert_len > SEV_FW_BLOB_MAX_SIZE) || + !access_ok(input.pdh_cert_address, input.pdh_cert_len)) { + ret = -EFAULT; + goto e_free; + } + + /* Allocate a physically contiguous buffer to store the cert chain blob. */ + if ((input.cert_chain_len > SEV_FW_BLOB_MAX_SIZE) || + !access_ok(input.cert_chain_address, input.cert_chain_len)) { + ret = -EFAULT; + goto e_free; + } + + pdh_blob = kmalloc(input.pdh_cert_len, GFP_KERNEL); + if (!pdh_blob) { + ret = -ENOMEM; + goto e_free; + } + + data->pdh_cert_address = __psp_pa(pdh_blob); + data->pdh_cert_len = input.pdh_cert_len; + + cert_blob = kmalloc(input.cert_chain_len, GFP_KERNEL); + if (!cert_blob) { + ret = -ENOMEM; + goto e_free_pdh; + } + + data->cert_chain_address = __psp_pa(cert_blob); + data->cert_chain_len = input.cert_chain_len; + +cmd: + /* If platform is not in INIT state then transition it to INIT. */ + if (psp_master->sev_state != SEV_STATE_INIT) { + ret = __sev_platform_init_locked(&argp->error); + if (ret) + goto e_free_cert; + } + + ret = __sev_do_cmd_locked(SEV_CMD_PDH_CERT_EXPORT, data, &argp->error); + + /* If we query the length, FW responded with expected data. */ + input.cert_chain_len = data->cert_chain_len; + input.pdh_cert_len = data->pdh_cert_len; + + if (copy_to_user((void __user *)argp->data, &input, sizeof(input))) { + ret = -EFAULT; + goto e_free_cert; + } + + if (pdh_blob) { + if (copy_to_user((void __user *)input.pdh_cert_address, + pdh_blob, input.pdh_cert_len)) { + ret = -EFAULT; + goto e_free_cert; + } + } + + if (cert_blob) { + if (copy_to_user((void __user *)input.cert_chain_address, + cert_blob, input.cert_chain_len)) + ret = -EFAULT; + } + +e_free_cert: + kfree(cert_blob); +e_free_pdh: + kfree(pdh_blob); +e_free: + kfree(data); + return ret; +} + +static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + struct sev_issue_cmd input; + int ret = -EFAULT; + + if (!psp_master) + return -ENODEV; + + if (ioctl != SEV_ISSUE_CMD) + return -EINVAL; + + if (copy_from_user(&input, argp, sizeof(struct sev_issue_cmd))) + return -EFAULT; + + if (input.cmd > SEV_MAX) + return -EINVAL; + + mutex_lock(&sev_cmd_mutex); + + switch (input.cmd) { + + case SEV_FACTORY_RESET: + ret = sev_ioctl_do_reset(&input); + break; + case SEV_PLATFORM_STATUS: + ret = sev_ioctl_do_platform_status(&input); + break; + case SEV_PEK_GEN: + ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PEK_GEN, &input); + break; + case SEV_PDH_GEN: + ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PDH_GEN, &input); + break; + case SEV_PEK_CSR: + ret = sev_ioctl_do_pek_csr(&input); + break; + case SEV_PEK_CERT_IMPORT: + ret = sev_ioctl_do_pek_import(&input); + break; + case SEV_PDH_CERT_EXPORT: + ret = sev_ioctl_do_pdh_export(&input); + break; + case SEV_GET_ID: + pr_warn_once("SEV_GET_ID command is deprecated, use SEV_GET_ID2\n"); + ret = sev_ioctl_do_get_id(&input); + break; + case SEV_GET_ID2: + ret = sev_ioctl_do_get_id2(&input); + break; + default: + ret = -EINVAL; + goto out; + } + + if (copy_to_user(argp, &input, sizeof(struct sev_issue_cmd))) + ret = -EFAULT; +out: + mutex_unlock(&sev_cmd_mutex); + + return ret; +} + +static const struct file_operations sev_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = sev_ioctl, +}; + +int sev_platform_status(struct sev_user_data_status *data, int *error) +{ + return sev_do_cmd(SEV_CMD_PLATFORM_STATUS, data, error); +} +EXPORT_SYMBOL_GPL(sev_platform_status); + +int sev_guest_deactivate(struct sev_data_deactivate *data, int *error) +{ + return sev_do_cmd(SEV_CMD_DEACTIVATE, data, error); +} +EXPORT_SYMBOL_GPL(sev_guest_deactivate); + +int sev_guest_activate(struct sev_data_activate *data, int *error) +{ + return sev_do_cmd(SEV_CMD_ACTIVATE, data, error); +} +EXPORT_SYMBOL_GPL(sev_guest_activate); + +int sev_guest_decommission(struct sev_data_decommission *data, int *error) +{ + return sev_do_cmd(SEV_CMD_DECOMMISSION, data, error); +} +EXPORT_SYMBOL_GPL(sev_guest_decommission); + +int sev_guest_df_flush(int *error) +{ + return sev_do_cmd(SEV_CMD_DF_FLUSH, NULL, error); +} +EXPORT_SYMBOL_GPL(sev_guest_df_flush); + +static void sev_exit(struct kref *ref) +{ + struct sev_misc_dev *misc_dev = container_of(ref, struct sev_misc_dev, refcount); + + misc_deregister(&misc_dev->misc); +} + +static int sev_misc_init(struct psp_device *psp) +{ + struct device *dev = psp->dev; + int ret; + + /* + * SEV feature support can be detected on multiple devices but the SEV + * FW commands must be issued on the master. During probe, we do not + * know the master hence we create /dev/sev on the first device probe. + * sev_do_cmd() finds the right master device to which to issue the + * command to the firmware. + */ + if (!misc_dev) { + struct miscdevice *misc; + + misc_dev = devm_kzalloc(dev, sizeof(*misc_dev), GFP_KERNEL); + if (!misc_dev) + return -ENOMEM; + + misc = &misc_dev->misc; + misc->minor = MISC_DYNAMIC_MINOR; + misc->name = DEVICE_NAME; + misc->fops = &sev_fops; + + ret = misc_register(misc); + if (ret) + return ret; + + kref_init(&misc_dev->refcount); + } else { + kref_get(&misc_dev->refcount); + } + + init_waitqueue_head(&psp->sev_int_queue); + psp->sev_misc = misc_dev; + dev_dbg(dev, "registered SEV device\n"); + + return 0; +} + +static int psp_check_sev_support(struct psp_device *psp) +{ + /* Check if device supports SEV feature */ + if (!(ioread32(psp->io_regs + psp->vdata->feature_reg) & 1)) { + dev_dbg(psp->dev, "psp does not support SEV\n"); + return -ENODEV; + } + + return 0; +} + +int psp_dev_init(struct sp_device *sp) +{ + struct device *dev = sp->dev; + struct psp_device *psp; + int ret; + + ret = -ENOMEM; + psp = psp_alloc_struct(sp); + if (!psp) + goto e_err; + + sp->psp_data = psp; + + psp->vdata = (struct psp_vdata *)sp->dev_vdata->psp_vdata; + if (!psp->vdata) { + ret = -ENODEV; + dev_err(dev, "missing driver data\n"); + goto e_err; + } + + psp->io_regs = sp->io_map; + + ret = psp_check_sev_support(psp); + if (ret) + goto e_disable; + + /* Disable and clear interrupts until ready */ + iowrite32(0, psp->io_regs + psp->vdata->inten_reg); + iowrite32(-1, psp->io_regs + psp->vdata->intsts_reg); + + /* Request an irq */ + ret = sp_request_psp_irq(psp->sp, psp_irq_handler, psp->name, psp); + if (ret) { + dev_err(dev, "psp: unable to allocate an IRQ\n"); + goto e_err; + } + + ret = sev_misc_init(psp); + if (ret) + goto e_irq; + + if (sp->set_psp_master_device) + sp->set_psp_master_device(sp); + + /* Enable interrupt */ + iowrite32(-1, psp->io_regs + psp->vdata->inten_reg); + + dev_notice(dev, "psp enabled\n"); + + return 0; + +e_irq: + sp_free_psp_irq(psp->sp, psp); +e_err: + sp->psp_data = NULL; + + dev_notice(dev, "psp initialization failed\n"); + + return ret; + +e_disable: + sp->psp_data = NULL; + + return ret; +} + +void psp_dev_destroy(struct sp_device *sp) +{ + struct psp_device *psp = sp->psp_data; + + if (!psp) + return; + + if (psp->sev_misc) + kref_put(&misc_dev->refcount, sev_exit); + + sp_free_psp_irq(sp, psp); +} + +int sev_issue_cmd_external_user(struct file *filep, unsigned int cmd, + void *data, int *error) +{ + if (!filep || filep->f_op != &sev_fops) + return -EBADF; + + return sev_do_cmd(cmd, data, error); +} +EXPORT_SYMBOL_GPL(sev_issue_cmd_external_user); + +void psp_pci_init(void) +{ + struct sp_device *sp; + int error, rc; + + sp = sp_get_psp_master_device(); + if (!sp) + return; + + psp_master = sp->psp_data; + + psp_timeout = psp_probe_timeout; + + if (sev_get_api_version()) + goto err; + + /* + * If platform is not in UNINIT state then firmware upgrade and/or + * platform INIT command will fail. These command require UNINIT state. + * + * In a normal boot we should never run into case where the firmware + * is not in UNINIT state on boot. But in case of kexec boot, a reboot + * may not go through a typical shutdown sequence and may leave the + * firmware in INIT or WORKING state. + */ + + if (psp_master->sev_state != SEV_STATE_UNINIT) { + sev_platform_shutdown(NULL); + psp_master->sev_state = SEV_STATE_UNINIT; + } + + if (sev_version_greater_or_equal(0, 15) && + sev_update_firmware(psp_master->dev) == 0) + sev_get_api_version(); + + /* Initialize the platform */ + rc = sev_platform_init(&error); + if (rc) { + dev_err(sp->dev, "SEV: failed to INIT error %#x\n", error); + return; + } + + dev_info(sp->dev, "SEV API:%d.%d build:%d\n", psp_master->api_major, + psp_master->api_minor, psp_master->build); + + return; + +err: + psp_master = NULL; +} + +void psp_pci_exit(void) +{ + if (!psp_master) + return; + + sev_platform_shutdown(NULL); +} diff --git a/drivers/crypto/ccp/sev-dev.h b/drivers/crypto/ccp/sev-dev.h new file mode 100644 index 0000000..2ca1a01 --- /dev/null +++ b/drivers/crypto/ccp/sev-dev.h @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * AMD Secure Encrypted Virtualization (SEV) interface + * + * Copyright (C) 2017-2019 Advanced Micro Devices, Inc. + * + * Author: Brijesh Singh + */ + +#ifndef __SEV_DEV_H__ +#define __SEV_DEV_H__ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sp-dev.h" + +#define PSP_CMD_COMPLETE BIT(1) + +#define PSP_CMDRESP_CMD_SHIFT 16 +#define PSP_CMDRESP_IOC BIT(0) +#define PSP_CMDRESP_RESP BIT(31) +#define PSP_CMDRESP_ERR_MASK 0xffff + +#define MAX_PSP_NAME_LEN 16 + +struct sev_misc_dev { + struct kref refcount; + struct miscdevice misc; +}; + +struct psp_device { + struct list_head entry; + + struct psp_vdata *vdata; + char name[MAX_PSP_NAME_LEN]; + + struct device *dev; + struct sp_device *sp; + + void __iomem *io_regs; + + int sev_state; + unsigned int sev_int_rcvd; + wait_queue_head_t sev_int_queue; + struct sev_misc_dev *sev_misc; + struct sev_user_data_status status_cmd_buf; + struct sev_data_init init_cmd_buf; + + u8 api_major; + u8 api_minor; + u8 build; +}; + +#endif /* __SEV_DEV_H */ diff --git a/drivers/crypto/ccp/sp-pci.c b/drivers/crypto/ccp/sp-pci.c index b29d2e6..473cf14 100644 --- a/drivers/crypto/ccp/sp-pci.c +++ b/drivers/crypto/ccp/sp-pci.c @@ -22,7 +22,7 @@ #include #include "ccp-dev.h" -#include "psp-dev.h" +#include "sev-dev.h" #define MSIX_VECTORS 2