diff options
Diffstat (limited to 'src/security')
| -rw-r--r-- | src/security/vboot/secdata_tpm.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/security/vboot/secdata_tpm.c b/src/security/vboot/secdata_tpm.c index dcb3c44d73..691d2c0e96 100644 --- a/src/security/vboot/secdata_tpm.c +++ b/src/security/vboot/secdata_tpm.c @@ -404,6 +404,16 @@ uint32_t antirollback_write_space_kernel(struct vb2_context *ctx) uint8_t size = VB2_SECDATA_KERNEL_MIN_SIZE; vb2api_secdata_kernel_check(ctx, &size); + /* + * Ensure that the TPM actually commits our changes to NVMEN in case + * there is a power loss or other unexpected event. The AP does not + * write to the TPM during normal boot flow; it only writes during + * recovery, software sync, or other special boot flows. When the AP + * wants to write, it is imporant to actually commit changes. + */ + if (CONFIG(CR50_IMMEDIATELY_COMMIT_FW_SECDATA)) + tlcl_cr50_enable_nvcommits(); + return safe_write(KERNEL_NV_INDEX, ctx->secdata_kernel, size); } |