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authorTony Luck <tony.luck@intel.com>2017-08-18 16:19:00 -0700
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-08-24 03:35:37 +0200
commit7dae6326ed76431653793df0388b3a404de1217e (patch)
tree403fa2fdab3b5291cdd0390d570a56aa4df05c4f /include/acpi
parent14ccee78fc82f5512908f4424f541549a5705b89 (diff)
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op-kernel-dev-7dae6326ed76431653793df0388b3a404de1217e.tar.gz
ACPI / sysfs: Extend ACPI sysfs to provide access to boot error region
The ACPI sysfs interface provides a way to read each ACPI table from userspace via entries in /sys/firmware/acpi/tables/ The BERT table simply provides the size and address of the error record in BIOS reserved memory and users may want access to this record. In an earlier age we might have used /dev/mem to retrieve this error record, but many systems disable /dev/mem for security reasons. Extend this driver to provide read-only access to the data via a file in a new directory /sys/firmware/acpi/tables/data/BERT Acked-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Tony Luck <tony.luck@intel.com> v4: fix typo reported by Punit Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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