diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-intel-m10-bmc-sec-update | 24 | ||||
| -rw-r--r-- | drivers/fpga/intel-m10-bmc-sec-update.c | 54 |
2 files changed, 78 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-m10-bmc-sec-update b/Documentation/ABI/testing/sysfs-driver-intel-m10-bmc-sec-update index 6114e15885e5..0a41afe0ab4c 100644 --- a/Documentation/ABI/testing/sysfs-driver-intel-m10-bmc-sec-update +++ b/Documentation/ABI/testing/sysfs-driver-intel-m10-bmc-sec-update @@ -28,6 +28,30 @@ Description: Read only. Returns the root entry hash for the BMC image underlying device supports it. Format: string. +What: /sys/bus/platform/drivers/intel-m10bmc-sec-update/.../security/sr_canceled_csks +Date: Sep 2022 +KernelVersion: 5.20 +Contact: Russ Weight <russell.h.weight@intel.com> +Description: Read only. Returns a list of indices for canceled code + signing keys for the static region. The standard bitmap + list format is used (e.g. "1,2-6,9"). + +What: /sys/bus/platform/drivers/intel-m10bmc-sec-update/.../security/pr_canceled_csks +Date: Sep 2022 +KernelVersion: 5.20 +Contact: Russ Weight <russell.h.weight@intel.com> +Description: Read only. Returns a list of indices for canceled code + signing keys for the partial reconfiguration region. The + standard bitmap list format is used (e.g. "1,2-6,9"). + +What: /sys/bus/platform/drivers/intel-m10bmc-sec-update/.../security/bmc_canceled_csks +Date: Sep 2022 +KernelVersion: 5.20 +Contact: Russ Weight <russell.h.weight@intel.com> +Description: Read only. Returns a list of indices for canceled code + signing keys for the BMC. The standard bitmap list format + is used (e.g. "1,2-6,9"). + What: /sys/bus/platform/drivers/intel-m10bmc-sec-update/.../security/flash_count Date: Sep 2022 KernelVersion: 5.20 diff --git a/drivers/fpga/intel-m10-bmc-sec-update.c b/drivers/fpga/intel-m10-bmc-sec-update.c index 25b21f116976..65fec2a70901 100644 --- a/drivers/fpga/intel-m10-bmc-sec-update.c +++ b/drivers/fpga/intel-m10-bmc-sec-update.c @@ -78,6 +78,57 @@ DEVICE_ATTR_SEC_REH_RO(bmc, BMC_PROG_MAGIC, BMC_PROG_ADDR, BMC_REH_ADDR); DEVICE_ATTR_SEC_REH_RO(sr, SR_PROG_MAGIC, SR_PROG_ADDR, SR_REH_ADDR); DEVICE_ATTR_SEC_REH_RO(pr, PR_PROG_MAGIC, PR_PROG_ADDR, PR_REH_ADDR); +#define CSK_BIT_LEN 128U +#define CSK_32ARRAY_SIZE DIV_ROUND_UP(CSK_BIT_LEN, 32) + +static ssize_t +show_canceled_csk(struct device *dev, u32 addr, char *buf) +{ + unsigned int i, stride, size = CSK_32ARRAY_SIZE * sizeof(u32); + struct m10bmc_sec *sec = dev_get_drvdata(dev); + DECLARE_BITMAP(csk_map, CSK_BIT_LEN); + __le32 csk_le32[CSK_32ARRAY_SIZE]; + u32 csk32[CSK_32ARRAY_SIZE]; + int ret; + + stride = regmap_get_reg_stride(sec->m10bmc->regmap); + if (size % stride) { + dev_err(sec->dev, + "CSK vector size (0x%x) not aligned to stride (0x%x)\n", + size, stride); + WARN_ON_ONCE(1); + return -EINVAL; + } + + ret = regmap_bulk_read(sec->m10bmc->regmap, addr, csk_le32, + size / stride); + if (ret) { + dev_err(sec->dev, "failed to read CSK vector: %x cnt %x: %d\n", + addr, size / stride, ret); + return ret; + } + + for (i = 0; i < CSK_32ARRAY_SIZE; i++) + csk32[i] = le32_to_cpu(((csk_le32[i]))); + + bitmap_from_arr32(csk_map, csk32, CSK_BIT_LEN); + bitmap_complement(csk_map, csk_map, CSK_BIT_LEN); + return bitmap_print_to_pagebuf(1, buf, csk_map, CSK_BIT_LEN); +} + +#define DEVICE_ATTR_SEC_CSK_RO(_name, _addr) \ +static ssize_t _name##_canceled_csks_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ return show_canceled_csk(dev, _addr, buf); } \ +static DEVICE_ATTR_RO(_name##_canceled_csks) + +#define CSK_VEC_OFFSET 0x34 + +DEVICE_ATTR_SEC_CSK_RO(bmc, BMC_PROG_ADDR + CSK_VEC_OFFSET); +DEVICE_ATTR_SEC_CSK_RO(sr, SR_PROG_ADDR + CSK_VEC_OFFSET); +DEVICE_ATTR_SEC_CSK_RO(pr, PR_PROG_ADDR + CSK_VEC_OFFSET); + #define FLASH_COUNT_SIZE 4096 /* count stored as inverted bit vector */ static ssize_t flash_count_show(struct device *dev, @@ -125,6 +176,9 @@ static struct attribute *m10bmc_security_attrs[] = { &dev_attr_bmc_root_entry_hash.attr, &dev_attr_sr_root_entry_hash.attr, &dev_attr_pr_root_entry_hash.attr, + &dev_attr_sr_canceled_csks.attr, + &dev_attr_pr_canceled_csks.attr, + &dev_attr_bmc_canceled_csks.attr, NULL, }; |