diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/crb/tis.c | 88 |
1 files changed, 87 insertions, 1 deletions
diff --git a/src/drivers/crb/tis.c b/src/drivers/crb/tis.c index 1167697651..bb1cf218ad 100644 --- a/src/drivers/crb/tis.c +++ b/src/drivers/crb/tis.c @@ -6,6 +6,10 @@ #include <device/device.h> #include <drivers/intel/ptt/ptt.h> #include <drivers/tpm/tpm_ppi.h> +#include <security/tpm/tss.h> +#include <endian.h> +#include <smbios.h> +#include <string.h> #include "tpm.h" #include "chip.h" @@ -126,6 +130,86 @@ static const char *crb_tpm_acpi_name(const struct device *dev) return "TPM"; } +#if CONFIG(GENERATE_SMBIOS_TABLES) && CONFIG(TPM2) +static int tpm_get_cap(uint32_t property, uint32_t *value) +{ + TPMS_CAPABILITY_DATA cap_data; + int i; + uint32_t status; + + if (!value) + return -1; + + status = tlcl_get_capability(TPM_CAP_TPM_PROPERTIES, property, 1, &cap_data); + + if (status) + return -1; + + for (i = 0 ; i < cap_data.data.tpmProperties.count; i++) { + if (cap_data.data.tpmProperties.tpmProperty[i].property == property) { + *value = cap_data.data.tpmProperties.tpmProperty[i].value; + return 0; + } + } + + return -1; +} + +static int smbios_write_type43_tpm(struct device *dev, int *handle, unsigned long *current) +{ + struct tpm2_info info; + uint32_t tpm_manuf, tpm_family; + uint32_t fw_ver1, fw_ver2; + uint8_t major_spec_ver, minor_spec_ver; + + tpm2_get_info(&info); + + /* If any of these have invalid values, assume TPM not present or disabled */ + if (info.vendor_id == 0 || info.vendor_id == 0xFFFF || + info.device_id == 0 || info.device_id == 0xFFFF) { + printk(BIOS_DEBUG, "%s: Invalid Vendor ID/Device ID\n", __func__); + return 0; + } + + /* Vendor ID is the value returned by TPM2_GetCapabiltiy TPM_PT_MANUFACTURER */ + if (tpm_get_cap(TPM_PT_MANUFACTURER, &tpm_manuf)) { + printk(BIOS_DEBUG, "TPM2_GetCap TPM_PT_MANUFACTURER failed\n"); + return 0; + } + + tpm_manuf = be32toh(tpm_manuf); + + if (tpm_get_cap(TPM_PT_FIRMWARE_VERSION_1, &fw_ver1)) { + printk(BIOS_DEBUG, "TPM2_GetCap TPM_PT_FIRMWARE_VERSION_1 failed\n"); + return 0; + } + + if (tpm_get_cap(TPM_PT_FIRMWARE_VERSION_2, &fw_ver2)) { + printk(BIOS_DEBUG, "TPM2_GetCap TPM_PT_FIRMWARE_VERSION_2 failed\n"); + return 0; + } + + if (tpm_get_cap(TPM_PT_FAMILY_INDICATOR, &tpm_family)) { + printk(BIOS_DEBUG, "TPM2_GetCap TPM_PT_FAMILY_INDICATOR failed\n"); + return 0; + } + + tpm_family = be32toh(tpm_family); + + if (!strncmp((char *)&tpm_family, "2.0", 4)) { + major_spec_ver = 2; + minor_spec_ver = 0; + } else { + printk(BIOS_ERR, "%s: Invalid TPM family\n", __func__); + return 0; + } + + return smbios_write_type43(current, handle, tpm_manuf, major_spec_ver, minor_spec_ver, + fw_ver1, fw_ver2, tis_get_dev_name(&info), + SMBIOS_TPM_DEVICE_CHARACTERISTICS_NOT_SUPPORTED, 0); +} +#endif + static struct device_operations __maybe_unused crb_ops = { .read_resources = noop_read_resources, .set_resources = noop_set_resources, @@ -133,7 +217,9 @@ static struct device_operations __maybe_unused crb_ops = { .acpi_name = crb_tpm_acpi_name, .acpi_fill_ssdt = crb_tpm_fill_ssdt, #endif - +#if CONFIG(GENERATE_SMBIOS_TABLES) && CONFIG(TPM2) + .get_smbios_data = smbios_write_type43_tpm, +#endif }; static void enable_dev(struct device *dev) |