diff options
Diffstat (limited to 'src/security/tpm/tss/vendor/cr50/cr50.c')
| -rw-r--r-- | src/security/tpm/tss/vendor/cr50/cr50.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/security/tpm/tss/vendor/cr50/cr50.c b/src/security/tpm/tss/vendor/cr50/cr50.c index ec69df4ac9..ae2f7c2516 100644 --- a/src/security/tpm/tss/vendor/cr50/cr50.c +++ b/src/security/tpm/tss/vendor/cr50/cr50.c @@ -107,6 +107,31 @@ uint32_t tlcl_cr50_get_tpm_mode(uint8_t *tpm_mode) return TPM_SUCCESS; } +uint32_t tlcl_cr50_get_boot_mode(uint8_t *boot_mode) +{ + struct tpm2_response *response; + uint16_t mode_command = TPM2_CR50_SUB_CMD_GET_BOOT_MODE; + + printk(BIOS_DEBUG, "Reading cr50 boot mode\n"); + + response = tpm_process_command(TPM2_CR50_VENDOR_COMMAND, &mode_command); + + if (!response) + return TPM_E_IOERROR; + + if (response->hdr.tpm_code == VENDOR_RC_NO_SUCH_COMMAND) + /* Explicitly inform caller when command is not supported */ + return TPM_E_NO_SUCH_COMMAND; + + if (response->hdr.tpm_code) + /* Unexpected return code from Cr50 */ + return TPM_E_IOERROR; + + *boot_mode = response->vcr.boot_mode; + + return TPM_SUCCESS; +} + uint32_t tlcl_cr50_immediate_reset(uint16_t timeout_ms) { struct tpm2_response *response; |