security/tpm/tss/vendor/cr50: Introduce vendor sub-command to reset EC
Add marshaling and unmarshaling support for cr50 vendor sub-command to
reset EC and a interface function to exchange the same.
BUG=b:181051734
TEST=Build and boot to OS in drawlat. Ensure that when the command is
issued, EC reset is triggered.
Change-Id: I46063678511d27fea5eabbd12fc3af0b1df68143
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51164
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/security/tpm/tss/tcg-2.0/tss_marshaling.c b/src/security/tpm/tss/tcg-2.0/tss_marshaling.c
index 3efd5ad..f21fe3d 100644
--- a/src/security/tpm/tss/tcg-2.0/tss_marshaling.c
+++ b/src/security/tpm/tss/tcg-2.0/tss_marshaling.c
@@ -333,6 +333,9 @@
case TPM2_CR50_SUB_CMD_GET_BOOT_MODE:
rc |= obuf_write_be16(ob, *sub_command);
break;
+ case TPM2_CR50_SUB_CMD_RESET_EC:
+ rc |= obuf_write_be16(ob, *sub_command);
+ break;
default:
/* Unsupported subcommand. */
printk(BIOS_WARNING, "Unsupported cr50 subcommand: 0x%04x\n",
@@ -560,6 +563,8 @@
return ibuf_read_be8(ib, &vcr->tpm_mode);
case TPM2_CR50_SUB_CMD_GET_BOOT_MODE:
return ibuf_read_be8(ib, &vcr->boot_mode);
+ case TPM2_CR50_SUB_CMD_RESET_EC:
+ break;
default:
printk(BIOS_ERR,
"%s:%d - unsupported vendor command %#04x!\n",