TPM: Add tlcl_cr50_get_boot_mode
tlcl_cr50_get_boot_mode gets the boot mode from Cr50. The boot mode
tells coreboot/depthcharge whether booting the kernel is allowed or
not.
BUG=b:147298634, chromium:1045217, b:148259137
BRANCH=none
TEST=Verify software sync succeeds on Puff.
Signed-off-by: dnojiri <dnojiri@chromium.org>
Change-Id: Iadae848c4bf315f2131ff6aebcb35938307b5db4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40388
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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 45ade1a..a229dd1 100644
--- a/src/security/tpm/tss/tcg-2.0/tss_marshaling.c
+++ b/src/security/tpm/tss/tcg-2.0/tss_marshaling.c
@@ -335,6 +335,9 @@
*/
rc |= obuf_write_be16(ob, *sub_command);
break;
+ case TPM2_CR50_SUB_CMD_GET_BOOT_MODE:
+ 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->recovery_button_state);
case TPM2_CR50_SUB_CMD_TPM_MODE:
return ibuf_read_be8(ib, &vcr->tpm_mode);
+ case TPM2_CR50_SUB_CMD_GET_BOOT_MODE:
+ return ibuf_read_be8(ib, &vcr->boot_mode);
default:
printk(BIOS_ERR,
"%s:%d - unsupported vendor command %#04x!\n",