[PATCH v2 00/11] ACPI: APEI: share GHES CPER helpers and add DT FFH provider

[Himanshu Chauhan]

On Fri, Feb 20, 2026 at 7:14 PM Ahmed Tiba <ahmed.tiba at arm.com> wrote:
>
> This is v2 of the GHES refactor series. The goal is to reuse existing
> GHES CPER handling for non-ACPI platforms without changing the GHES
> flow or naming, and add a DT firmware-first CPER provider, while
> keeping the changes mechanical and reviewable.

It seems almost all the code is being moved from ghes.c to ghes_cper.c
in multiple patches. It is not making sense and looks like an
unnecessary churn.
What is that which can't be handled in a separate file for non-ACPI platforms?

>
> Signed-off-by: Ahmed Tiba <ahmed.tiba at arm.com>
> ---
> Changes in v2:
> - Dropped the proposed "estatus core" and kept GHES naming/flow intact
>   (per Borislav Petkov).
> - Re-sliced the series into smaller mechanical steps (per Mauro Carvalho Chehab).
> - Minor DT binding fixes based on Krzysztof Kozlowski's feedback.
> - Removed fixmap slot usage from the DT FFH driver (per Will Deacon).
>
> Series structure:
> - Patches 1-8 are mechanical moves only and do not change behavior.
> - Patch 9 wires the shared helpers back into GHES.
> - The DT firmware-first CPER buffer provider is added in the final patches.
> - "ACPI: APEI: introduce GHES helper" is internal build glue only
>   and does not introduce a new user-visible configuration option.
>
> - Link to v1: https://lore.kernel.org/r/20251217112845.1814119-1-ahmed.tiba@arm.com
>
> ---
> Ahmed Tiba (11):
>       ACPI: APEI: GHES: share macros via a private header
>       ACPI: APEI: GHES: add ghes_cper.o stub
>       ACPI: APEI: GHES: move CPER read helpers
>       ACPI: APEI: GHES: move GHESv2 ack and alloc helpers
>       ACPI: APEI: GHES: move estatus cache helpers
>       ACPI: APEI: GHES: move vendor record helpers
>       ACPI: APEI: GHES: move CXL CPER helpers
>       ACPI: APEI: introduce GHES helper
>       ACPI: APEI: share GHES CPER helpers
>       dt-bindings: firmware: add arm,ras-ffh
>       RAS: add DeviceTree firmware-first CPER provider
>
>  Documentation/admin-guide/RAS/main.rst             |   18 +
>  .../devicetree/bindings/firmware/arm,ras-ffh.yaml  |   71 ++
>  MAINTAINERS                                        |    6 +
>  drivers/Makefile                                   |    1 +
>  drivers/acpi/Kconfig                               |    4 +
>  drivers/acpi/apei/Kconfig                          |    1 +
>  drivers/acpi/apei/apei-internal.h                  |   10 +-
>  drivers/acpi/apei/ghes.c                           | 1024 +------------------
>  drivers/acpi/apei/ghes_cper.c                      | 1026 ++++++++++++++++++++
>  drivers/ras/Kconfig                                |   12 +
>  drivers/ras/Makefile                               |    1 +
>  drivers/ras/esource-dt.c                           |  264 +++++
>  include/acpi/ghes.h                                |   10 +-
>  include/acpi/ghes_cper.h                           |  143 +++
>  include/cxl/event.h                                |    2 +-
>  15 files changed, 1558 insertions(+), 1035 deletions(-)
> ---
> base-commit: 8bf22c33e7a172fbc72464f4cc484d23a6b412ba
> change-id: 20260220-topics-ahmtib01-ras_ffh_arm_internal_review-bfddc7fc7cab
>
> Best regards,
> --
> Ahmed Tiba <ahmed.tiba at arm.com>
>
>