diff options
Diffstat (limited to 'src/security/tpm/tss/vendor/cr50/cr50.c')
| -rw-r--r-- | src/security/tpm/tss/vendor/cr50/cr50.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/security/tpm/tss/vendor/cr50/cr50.c b/src/security/tpm/tss/vendor/cr50/cr50.c index a5b8057a01..e38ca30ad4 100644 --- a/src/security/tpm/tss/vendor/cr50/cr50.c +++ b/src/security/tpm/tss/vendor/cr50/cr50.c @@ -2,6 +2,7 @@ #include <console/console.h> #include <endian.h> +#include <halt.h> #include <vb2_api.h> #include <security/tpm/tis.h> #include <security/tpm/tss.h> @@ -148,3 +149,30 @@ uint32_t tlcl_cr50_immediate_reset(uint16_t timeout_ms) return TPM_SUCCESS; } + +uint32_t tlcl_cr50_reset_ec(void) +{ + struct tpm2_response *response; + uint16_t reset_cmd = TPM2_CR50_SUB_CMD_RESET_EC; + + printk(BIOS_DEBUG, "Issuing EC reset\n"); + + response = tpm_process_command(TPM2_CR50_VENDOR_COMMAND, &reset_cmd); + + if (!response) + return TPM_E_IOERROR; + + if (response->hdr.tpm_code == VENDOR_RC_NO_SUCH_COMMAND || + response->hdr.tpm_code == VENDOR_RC_NO_SUCH_SUBCOMMAND) + /* 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; + + printk(BIOS_DEBUG, "EC reset coming up...\n"); + halt(); + + return TPM_SUCCESS; +} |