On Thu, 17 Aug 2017 14:39:46 -0700 "Luck, Tony" <tony.l...@intel.com> wrote:
> From: Tony Luck <tony.l...@intel.com> > > 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 Should this not also have a capability check. Assuming file permissions are sufficient for grabbing a chunk of system memory holding error info doesn't seem too scary but it's at odds with a lot of other cases ? Alan
