Re: [PATCH 0/2] remoteproc: k3: Recover a crashed remote core

[Francesco Valla]

Hello Chrispine,

9 Nov 2026 06:49:26 Chrispine Tinega <dev@xxxxxxxxxxxxxxxxxxx>:

> A K3 remote core can tell Linux it has crashed by sending RP_MBOX_CRASH,
> but the K3 drivers only log it. Nothing reaches the remoteproc core, so
> the crash is not counted and recovery never runs. The core stays halted
> until the next boot, with its rpmsg channels dead.
>
> Patch 1 reports the crash with rproc_report_crash(). This applies to
> every K3 remote that uses the common mailbox callback.
>
> Patch 2 leaves recovery enabled on the M4F. Its stop is a plain reset,
> so recovery does not need the crashed core to answer. The R5F and DSP
> drivers keep recovery disabled. A crashed core there moves to
> RPROC_CRASHED, and can be stopped and started again through sysfs.
>
> Tested on an AM625 board (BLIIoT BL350) running TI's 6.12 kernel with
> the equivalent change. The M4F runs Zephyr, whose fatal-error handler
> sends RP_MBOX_CRASH. After a forced fault, recovery reset and rebooted
> the M4F in 71 ms, and Linux kept running. Mainline's M4F stop is the
> same plain reset that this test used for a crashed core.
>

If you share details on the Zephyr side of things, I can test this against rproc-next on a AM67A (BeagleY-AI).

Regards,
Francesco

> Chrispine Tinega (2):
>   remoteproc: k3: Report a remote crash to the remoteproc core
>   remoteproc: k3-m4: Leave crash recovery enabled
>
> drivers/remoteproc/ti_k3_common.c        | 5 +----
> drivers/remoteproc/ti_k3_m4_remoteproc.c | 1 -
> 2 files changed, 1 insertion(+), 5 deletions(-)
>
>
> base-commit: ec1f9ba57b02fe12a6fa5f141206d439ba3d044e
> --
> 2.53.0