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

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Message-Id: <20200407082923.2001556-1-patrick.rudolph@9elements.com>
Date:   Tue,  7 Apr 2020 10:29:05 +0200
From:   patrick.rudolph@...ements.com
To:     linux-kernel@...r.kernel.org
Cc:     coreboot@...eboot.org,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexios Zavras <alexios.zavras@...el.com>,
        Allison Randal <allison@...utok.net>,
        Julius Werner <jwerner@...omium.org>,
        Samuel Holland <samuel@...lland.org>,
        Stephen Boyd <swboyd@...omium.org>
Subject: [PATCH v4 0/2] firmware: google: Expose coreboot tables and CBMEM

From: Patrick Rudolph <patrick.rudolph@...ements.com>

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

-- 
2.24.1