[PATCH v4 0/6] remoteproc: qcom: pas: Misc fixes

[Mukesh Ojha]

This series is a collection of misc fixes for the Qualcomm PAS remoteproc
driver and its supporting SCM/MDT loader infrastructure.

- Fix sparse __iomem warnings in qcom_adsp, qcom_pas and qcom_wcnss by
  annotating mem_region fields with __iomem and using __force at call sites.
- Guard the DTB metadata release in qcom_pas_load() with a dtb_pas_id check,
  consistent with all other release sites in the driver.
- Move PAS context allocation from probe into qcom_pas_alloc_memory_region()
  so the DTB context is only created for subsystems that actually use it.
- Map/unmap the subsystem memory region on demand around firmware load and
  coredump, avoiding potential XPU violations on EL2 platforms where the
  region may be handed off to the remote side.
- Drop the now-unused dtb_mem_region field from struct qcom_pas.
- Add a keep_mdt_buf flag to struct qcom_scm_pas_context to make metadata
  buffer retention explicit rather than implicit.

Changes in v4:
 https://lore.kernel.org/lkml/20260331183957.2015440-1-mukesh.ojha@xxxxxxxxxxxxxxxx/
 https://lore.kernel.org/lkml/20260331191210.2019758-2-mukesh.ojha@xxxxxxxxxxxxxxxx/

 - Last series mistakenly divided two series cause laptop shutdown.
 - Some minor refactor common code rest is same a rebased on latest
   kernel.
 - Added new 6/6 to the series.

Mukesh Ojha (6):
  remoteproc: qcom: fix sparse warnings for __iomem annotated mem_region
  remoteproc: qcom: pas: Guard dtb metadata release with dtb_pas_id
    check
  remoteproc: qcom: pas: Fix the PAS context creation placement
  remoteproc: qcom: pas: Map/unmap subsystem region before
    auth_and_reset
  remoteproc: qcom: pas: Drop unused dtb_mem_region field
  firmware: qcom: scm: introduce keep_mdt_buf flag in PAS context

 drivers/firmware/qcom/qcom_scm.c       | 21 +++++-
 drivers/remoteproc/qcom_q6v5_adsp.c    |  6 +-
 drivers/remoteproc/qcom_q6v5_pas.c     | 99 +++++++++++++++-----------
 drivers/remoteproc/qcom_wcnss.c        |  6 +-
 drivers/soc/qcom/mdt_loader.c          | 18 +++--
 include/linux/firmware/qcom/qcom_scm.h |  1 +
 include/linux/soc/qcom/mdt_loader.h    |  4 +-
 7 files changed, 99 insertions(+), 56 deletions(-)

-- 
2.53.0