Subject: Re: [PATCH v3 0/3] Add i.MX94 remoteproc support and reset vector handling improvements

From: Mathieu Poirier <[email-masked]>
Date: Thu, 23 Apr 2026 11:17:46 -0600

On Wed, Apr 15, 2026 at 03:50:37PM +0800, Peng Fan (OSS) wrote:
> This series adds remoteproc support for the i.MX94 family, including the
> CM70, CM71, and CM33S cores, and derive the hardware reset vector for
> Cortex‑M processors whose ELF entry point does not directly correspond to
> the actual reset address.
> 
> Background:
> Cortex‑M processors fetch their initial SP and PC from a fixed reset vector
> table. While ELF images embed the entry point (e_entry), this value is
> not always aligned to the hardware reset address. On platforms such as
> i.MX94 CM33S, masking is required to compute the correct reset vector
> address before programming the SoC reset registers.
> 
> Similarly, on i.MX95, the existing implementation always programs a reset
> vector of 0x0, which only works when executing entirely from TCM. When
> firmware is loaded into DDR, the driver must pass the correct reset vector
> to the SM CPU/LMM interfaces.
> 
> Summary of patches:
> [1]dt-bindings: remoteproc: imx-rproc: Introduce fsl,reset-vector-mask
> Adds a new DT property allowing SoCs to specify a mask for deriving the
> hardware reset vector from the ELF entry point.
> 
> [2]remoteproc: imx_rproc: Program non-zero SM CPU/LMM reset vector
> Ensures the correct reset vector is passed to SM APIs by introducing a
> helper (imx_rproc_sm_get_reset_vector()) that applies the reset‑vector
> mask.
> 
> [3]remoteproc: imx_rproc: Add support for i.MX94 remoteproc
> Adds address translation tables and configuration data for CM70, CM71,
> and CM33S, enabling full remoteproc operation on i.MX94.
> 
> Signed-off-by: Peng Fan <[email-masked]>
> ---
> Changes in v3:
> - Patch 2: 
>   Drop R-b because of changes in V3
> 
>   Following suggestion from Mathieu that apply reset vector in
>   scmi_imx_[cpu,lmm]_reset_vector_set(), not change the meaning of
>   rproc->bootaddr, add helper imx_rproc_sm_get_reset_vector() to get reset
>   vector and use the hlper in scmi_imx_[cpu,lmm]_reset_vector_set().
> 
>   Add reset-vector-mask for i.MX95 CM7 to avoid breaking i.MX95 CM7
>   boot.
> 
> - Link to v2: https://lore.kernel.org/r/[email-masked]
> 
> Changes in v2:
> - Drop fsl,reset-vector-mask by using fixed value in driver for per device
> - Add R-b for i.MX94 dt-binding
> - Update commit log to include dev addr and sys addr
> - Link to v1: https://lore.kernel.org/r/[email-masked]
> 
> ---
> Peng Fan (3):
>       dt-bindings: remoteproc: imx-rproc: Support i.MX94
>       remoteproc: imx_rproc: Program non-zero SM CPU/LMM reset vector
>       remoteproc: imx_rproc: Add support for i.MX94
> 
>  .../bindings/remoteproc/fsl,imx-rproc.yaml         |  3 +
>  drivers/remoteproc/imx_rproc.c                     | 98 +++++++++++++++++++++-
>  drivers/remoteproc/imx_rproc.h                     |  2 +
>  3 files changed, 101 insertions(+), 2 deletions(-)

Much better - I'll pick this up when 7.1-rc1 comes out.

Thanks,
Mathieu

> ---
> base-commit: 724699d8d0523909da51fda8d1e10c1ff867b280
> change-id: 20260311-imx943-rproc-2050e00b65f7
> 
> Best regards,
> -- 
> Peng Fan <[email-masked]>
>