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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Apr 2023 18:56:01.8544 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1206370c-59b9-4f27-4274-08db481a363c 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: DM6NAM11FT050.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5206 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@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. Signed-off-by: Mario Limonciello Acked-by: Tom Lendacky --- 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 85e3dc8853e2..7ef7c09b4a2f 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, };