[PATCH v9 0/4] firmware: Add coreboot CFR firmware attributes driver

[Sean Rhodes <sean@starlabs.systems>]

Move the firmware attributes class helper out of platform/x86, rename the
coreboot-table firmware driver directory from google to coreboot, and add a
coreboot CFR firmware attributes driver.

Changes in v9:
- Add the missing kstrtox.h include used by kstrtou32().
- Use a single kobject rollback path when setting registration fails.
- Split a few helper locals for readability, including the pending reboot
  device lookup and enum-value population.
- Avoid an intermediate void pointer cast while parsing numeric CFR options.
- Check the possible-values buffer length before computing each label length.

Changes in v8:
- Add a preparatory include-order cleanup before moving the firmware
  attributes class helper.
- Add direct includes for __packed and container_of(), use scoped cleanup for
  EFI names and the driver mutex, and document the efivar lock requirement on
  private helpers.
- Replace the duplicated CFR record walkers with one checked iterator that
  distinguishes malformed input from the end of a record list.
- Validate enum entries before accessing them and propagate malformed child
  records instead of treating them as absent.
- Restore the EFI variable after a failed runtime apply without retrying the
  failed firmware operation, and only emit a change event when the new EFI
  value remains stored.
- Document the possible-values size limit and why CFR entries without a usable
  runtime EFI variable are skipped.

Testing:
- x86_64 out-of-tree W=1 build of drivers/firmware/coreboot/coreboot-cfr.o.
- checkpatch --strict --git HEAD.
- v8 x86_64 and UML allmodconfig W=1 builds of the driver and helper.
- v8 runtime APM_CNT apply and reboot-needed behavior on a Star Labs Byte with
  firmware 26.07 and Linux 6.17.

Sean Rhodes (4):
  platform/x86: Sort firmware attributes class includes
  firmware: Move firmware attributes class helper
  firmware: Rename google firmware directory to coreboot
  firmware: coreboot: Add CFR firmware attributes driver

 MAINTAINERS                                   |   18 +-
 drivers/firmware/Kconfig                      |    5 +-
 drivers/firmware/Makefile                     |    3 +-
 drivers/firmware/{google => coreboot}/Kconfig |   20 +-
 .../firmware/{google => coreboot}/Makefile    |    1 +
 drivers/firmware/{google => coreboot}/cbmem.c |    0
 drivers/firmware/coreboot/coreboot-cfr.c      | 1193 +++++++++++++++++
 .../{google => coreboot}/coreboot_table.c     |    0
 .../{google => coreboot}/coreboot_table.h     |    0
 .../framebuffer-coreboot.c                    |    0
 drivers/firmware/{google => coreboot}/gsmi.c  |    0
 .../memconsole-coreboot.c                     |    0
 .../memconsole-x86-legacy.c                   |    0
 .../{google => coreboot}/memconsole.c         |    0
 .../{google => coreboot}/memconsole.h         |    6 +-
 drivers/firmware/{google => coreboot}/vpd.c   |    0
 .../{google => coreboot}/vpd_decode.c         |    0
 .../{google => coreboot}/vpd_decode.h         |    0
 .../firmware_attributes_class.c               |    2 +-
 drivers/platform/x86/Kconfig                  |    3 -
 drivers/platform/x86/Makefile                 |    2 -
 drivers/platform/x86/asus-armoury.c           |    2 +-
 .../x86/dell/dell-wmi-sysman/sysman.c         |    9 +-
 drivers/platform/x86/hp/hp-bioscfg/bioscfg.c  |    9 +-
 drivers/platform/x86/lenovo/think-lmi.c       |    5 +-
 drivers/platform/x86/lenovo/wmi-other.c       |    2 +-
 drivers/platform/x86/samsung-galaxybook.c     |    3 +-
 .../linux/firmware_attributes.h               |    6 +-
 28 files changed, 1257 insertions(+), 32 deletions(-)
 rename drivers/firmware/{google => coreboot}/Kconfig (82%)
 rename drivers/firmware/{google => coreboot}/Makefile (92%)
 rename drivers/firmware/{google => coreboot}/cbmem.c (100%)
 create mode 100644 drivers/firmware/coreboot/coreboot-cfr.c
 rename drivers/firmware/{google => coreboot}/coreboot_table.c (100%)
 rename drivers/firmware/{google => coreboot}/coreboot_table.h (100%)
 rename drivers/firmware/{google => coreboot}/framebuffer-coreboot.c (100%)
 rename drivers/firmware/{google => coreboot}/gsmi.c (100%)
 rename drivers/firmware/{google => coreboot}/memconsole-coreboot.c (100%)
 rename drivers/firmware/{google => coreboot}/memconsole-x86-legacy.c (100%)
 rename drivers/firmware/{google => coreboot}/memconsole.c (100%)
 rename drivers/firmware/{google => coreboot}/memconsole.h (82%)
 rename drivers/firmware/{google => coreboot}/vpd.c (100%)
 rename drivers/firmware/{google => coreboot}/vpd_decode.c (100%)
 rename drivers/firmware/{google => coreboot}/vpd_decode.h (100%)
 rename drivers/{platform/x86 => firmware}/firmware_attributes_class.c (94%)
 rename drivers/platform/x86/firmware_attributes_class.h => include/linux/firmware_attributes.h (60%)