[PATCH v4 0/2] firmware: google: Expose coreboot tables and CBMEM

[patrick . rudolph]

From: Patrick Rudolph <patrick.rudolph@xxxxxxxxxxxxx>

As user land tools currently use /dev/mem to access coreboot tables and
CBMEM, provide a better way by using read-only sysfs attributes.

Unconditionally expose all tables and buffers making future changes in
coreboot possible without modifying a kernel driver.

Changes in v2:
 - Add ABI documentation
 - Add 0x prefix on hex values
 - Remove wrong ioremap hint as found by CI

Changes in v3:
 - Use BIN_ATTR_RO

Changes in v4:
 - Use temporary memremap instead of persistent ioremap
 - Constify a struct
 - Get rid of unused headers
 - Use dev_{get|set}_drvdata
 - Use dev_groups to automatically handle attributes
 - Updated file description
 - Updated ABI documentation

Patrick Rudolph (2):
  firmware: google: Expose CBMEM over sysfs
  firmware: google: Expose coreboot tables over sysfs

 Documentation/ABI/stable/sysfs-bus-coreboot |  74 +++++++++++
 drivers/firmware/google/Kconfig             |   9 ++
 drivers/firmware/google/Makefile            |   1 +
 drivers/firmware/google/cbmem-coreboot.c    | 128 ++++++++++++++++++++
 drivers/firmware/google/coreboot_table.c    |  58 +++++++++
 drivers/firmware/google/coreboot_table.h    |  14 +++
 6 files changed, 284 insertions(+)
 create mode 100644 Documentation/ABI/stable/sysfs-bus-coreboot
 create mode 100644 drivers/firmware/google/cbmem-coreboot.c

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2.24.1