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Miller" , , , Mario Limonciello Subject: [PATCH v4 02/11] crypto: ccp: Add support for displaying PSP firmware versions Date: Thu, 8 Jun 2023 06:17:48 -0500 Message-ID: <20230608111757.32054-3-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230608111757.32054-1-mario.limonciello@amd.com> References: <20230608111757.32054-1-mario.limonciello@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000044FC:EE_|IA0PR12MB7650:EE_ X-MS-Office365-Filtering-Correlation-Id: 35a184fc-21a8-4429-c400-08db68544e96 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:(13230028)(4636009)(376002)(346002)(396003)(136003)(39860400002)(451199021)(46966006)(36840700001)(40470700004)(356005)(1076003)(2616005)(41300700001)(36860700001)(336012)(7696005)(426003)(6666004)(186003)(26005)(16526019)(83380400001)(47076005)(478600001)(40480700001)(40460700003)(54906003)(110136005)(81166007)(82310400005)(70586007)(70206006)(316002)(82740400003)(2906002)(8936002)(5660300002)(4326008)(8676002)(44832011)(86362001)(36756003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jun 2023 19:12:30.6695 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 35a184fc-21a8-4429-c400-08db68544e96 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: CO1PEPF000044FC.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7650 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org As it's not always obvious what PSP bootloader or TEE version are present in OEM systems, add the ability to get this information from sysfs for supported platforms. Acked-by: Tom Lendacky Signed-off-by: Mario Limonciello --- v2->v3: * Pick up tag v1->v2: * Move GENMASK declarations to top of the file * Add comment to support why checking for 0xffffffff --- Documentation/ABI/testing/sysfs-driver-ccp | 18 ++++++ drivers/crypto/ccp/sp-dev.h | 2 + drivers/crypto/ccp/sp-pci.c | 64 ++++++++++++++++++++++ 3 files changed, 84 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-driver-ccp b/Documentation/ABI/testing/sysfs-driver-ccp index 7aded9b75553..ee6b787eee7a 100644 --- a/Documentation/ABI/testing/sysfs-driver-ccp +++ b/Documentation/ABI/testing/sysfs-driver-ccp @@ -85,3 +85,21 @@ Description: Possible values: 0: Not enforced 1: Enforced + +What: /sys/bus/pci/devices//bootloader_version +Date: June 2023 +KernelVersion: 6.4 +Contact: mario.limonciello@amd.com +Description: + The /sys/bus/pci/devices//bootloader_version + file reports the firmware version of the AMD AGESA + bootloader. + +What: /sys/bus/pci/devices//tee_version +Date: June 2023 +KernelVersion: 6.4 +Contact: mario.limonciello@amd.com +Description: + The /sys/bus/pci/devices//tee_version + file reports the firmware version of the AMD Trusted + Execution Environment (TEE). diff --git a/drivers/crypto/ccp/sp-dev.h b/drivers/crypto/ccp/sp-dev.h index 1253a0217985..76c32ee6bd65 100644 --- a/drivers/crypto/ccp/sp-dev.h +++ b/drivers/crypto/ccp/sp-dev.h @@ -51,6 +51,7 @@ struct tee_vdata { const unsigned int cmdbuff_addr_hi_reg; const unsigned int ring_wptr_reg; const unsigned int ring_rptr_reg; + const unsigned int info_reg; }; struct platform_access_vdata { @@ -69,6 +70,7 @@ struct psp_vdata { const unsigned int feature_reg; const unsigned int inten_reg; const unsigned int intsts_reg; + const unsigned int bootloader_info_reg; }; /* Structure to hold SP device data */ diff --git a/drivers/crypto/ccp/sp-pci.c b/drivers/crypto/ccp/sp-pci.c index c8f075a7f49f..6c93577950c7 100644 --- a/drivers/crypto/ccp/sp-pci.c +++ b/drivers/crypto/ccp/sp-pci.c @@ -8,6 +8,7 @@ * Author: Gary R Hook */ +#include #include #include #include @@ -24,6 +25,12 @@ #include "ccp-dev.h" #include "psp-dev.h" +/* used for version string AA.BB.CC.DD */ +#define AA GENMASK(31, 24) +#define BB GENMASK(23, 16) +#define CC GENMASK(15, 8) +#define DD GENMASK(7, 0) + #define MSIX_VECTORS 2 struct sp_pci { @@ -88,8 +95,65 @@ static struct attribute_group psp_security_attr_group = { .is_visible = psp_security_is_visible, }; +#define version_attribute_show(name, _offset) \ +static ssize_t name##_show(struct device *d, struct device_attribute *attr, \ + char *buf) \ +{ \ + struct sp_device *sp = dev_get_drvdata(d); \ + struct psp_device *psp = sp->psp_data; \ + unsigned int val = ioread32(psp->io_regs + _offset); \ + return sysfs_emit(buf, "%02lx.%02lx.%02lx.%02lx\n", \ + FIELD_GET(AA, val), \ + FIELD_GET(BB, val), \ + FIELD_GET(CC, val), \ + FIELD_GET(DD, val)); \ +} + +version_attribute_show(bootloader_version, psp->vdata->bootloader_info_reg) +static DEVICE_ATTR_RO(bootloader_version); +version_attribute_show(tee_version, psp->vdata->tee->info_reg) +static DEVICE_ATTR_RO(tee_version); + +static struct attribute *psp_firmware_attrs[] = { + &dev_attr_bootloader_version.attr, + &dev_attr_tee_version.attr, + NULL, +}; + +static umode_t psp_firmware_is_visible(struct kobject *kobj, struct attribute *attr, int idx) +{ + struct device *dev = kobj_to_dev(kobj); + struct sp_device *sp = dev_get_drvdata(dev); + struct psp_device *psp = sp->psp_data; + unsigned int val = 0xffffffff; + + if (!psp) + return 0; + + if (attr == &dev_attr_bootloader_version.attr && + psp->vdata->bootloader_info_reg) + val = ioread32(psp->io_regs + psp->vdata->bootloader_info_reg); + + if (attr == &dev_attr_tee_version.attr && + psp->capability & PSP_CAPABILITY_TEE && + psp->vdata->tee->info_reg) + val = ioread32(psp->io_regs + psp->vdata->tee->info_reg); + + /* If platform disallows accessing this register it will be all f's */ + if (val != 0xffffffff) + return 0444; + + return 0; +} + +static struct attribute_group psp_firmware_attr_group = { + .attrs = psp_firmware_attrs, + .is_visible = psp_firmware_is_visible, +}; + static const struct attribute_group *psp_groups[] = { &psp_security_attr_group, + &psp_firmware_attr_group, NULL, }; -- 2.34.1