diff options
| -rw-r--r-- | firmware/2lib/2misc.c | 8 | ||||
| -rw-r--r-- | firmware/2lib/include/2api.h | 15 |
2 files changed, 23 insertions, 0 deletions
diff --git a/firmware/2lib/2misc.c b/firmware/2lib/2misc.c index 7c4ca262..8b3aed03 100644 --- a/firmware/2lib/2misc.c +++ b/firmware/2lib/2misc.c @@ -713,3 +713,11 @@ char *vb2api_get_debug_info(struct vb2_context *ctx) buf[DEBUG_INFO_MAX_LENGTH] = '\0'; return buf; } + +void vb2api_prepare_for_extra_reboot(struct vb2_context *ctx) +{ + struct vb2_shared_data *sd = vb2_get_sd(ctx); + + vb2_nv_set(ctx, VB2_NV_FW_TRIED, sd->last_fw_slot); + vb2_nv_set(ctx, VB2_NV_FW_RESULT, sd->last_fw_result); +} diff --git a/firmware/2lib/include/2api.h b/firmware/2lib/include/2api.h index 4c5e1dc6..88ffc2fe 100644 --- a/firmware/2lib/include/2api.h +++ b/firmware/2lib/include/2api.h @@ -1542,4 +1542,19 @@ vb2_error_t vb2ex_diag_memory_full_test(int reset, const char **out); */ uint32_t vb2ex_mtime(void); +/*****************************************************************************/ +/* FW branch only API. */ + +/** + * Prepare for a extra reboot + * + * To address a firmware bug b/180686277, a mitigation is added which introduces + * an additional EC reset. But when both the kernel partitions are corruption, + * this mitigiation introduces a reboot loop. To fix the reboot loop, a firmware + * branch only vboot API is introduced to prepare for the extra reboot. This + * work-around API stores the FW_TRIED and FW_RESULT data into vboot's NV + * storage before triggering a reboot. + */ +void vb2api_prepare_for_extra_reboot(struct vb2_context *ctx); + #endif /* VBOOT_REFERENCE_2API_H_ */ |