diff options
Diffstat (limited to 'src/vendorcode/google/chromeos/vboot2/recovery.c')
| -rw-r--r-- | src/vendorcode/google/chromeos/vboot2/recovery.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/vendorcode/google/chromeos/vboot2/recovery.c b/src/vendorcode/google/chromeos/vboot2/recovery.c index 2cd5e806ea..94a8cc3f37 100644 --- a/src/vendorcode/google/chromeos/vboot2/recovery.c +++ b/src/vendorcode/google/chromeos/vboot2/recovery.c @@ -14,6 +14,7 @@ */ #include <assert.h> +#include <bootstate.h> #include <rules.h> #include <string.h> #include <vb2_api.h> @@ -32,6 +33,39 @@ static int vb2_get_recovery_reason_shared_data(void) return sd->recovery_reason; } +void vb2_save_recovery_reason_vbnv(void) +{ + if (!IS_ENABLED(CONFIG_VBOOT_SAVE_RECOVERY_REASON_ON_REBOOT)) + return; + + int reason = vb2_get_recovery_reason_shared_data(); + if (!reason) + return; + + set_recovery_mode_into_vbnv(reason); +} + +static void vb2_clear_recovery_reason_vbnv(void *unused) +{ + if (!IS_ENABLED(CONFIG_VBOOT_SAVE_RECOVERY_REASON_ON_REBOOT)) + return; + + set_recovery_mode_into_vbnv(0); +} + +/* + * Recovery reason stored in VBNV needs to be cleared before the state of VBNV + * is backed-up anywhere or jumping to the payload (whichever occurs + * first). Currently, vbnv_cmos.c backs up VBNV on POST_DEVICE. Thus, we need to + * make sure that the stored recovery reason is cleared off before that + * happens. + * IMPORTANT: Any reboot occurring after BS_DEV_INIT state will cause loss of + * recovery reason on reboot. Until now, we have seen reboots occuring on x86 + * only in FSP stages which run before BS_DEV_INIT. + */ +BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_EXIT, + vb2_clear_recovery_reason_vbnv, NULL); + /* * Returns 0 for the stages where we know that cbmem does not come online. * Even if this function returns 1 for romstage, depending upon the point in |