en Copyright 2015 Java http://172.16.0.5:8080/history/linux-6.15/Documentation/ABI/testing/sysfs-bus-coreboot#ebab9426 Documentation/ABI: Fix typosFix typos in Documentation/ABI. The changes are in descriptions orcomments where they shouldn't affect use of the ABIs.Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>Reviewed-by: Randy Dunlap <rdunlap@infradead.org>Link: https://lore.kernel.org/r/20230814212822.193684-2-helgaas@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net> List of files: /linux-6.15/Documentation/ABI/testing/sysfs-bus-coreboot Mon, 14 Aug 2023 21:28:20 +0000 Bjorn Helgaas <bhelgaas@google.com> http://172.16.0.5:8080/history/linux-6.15/Documentation/ABI/testing/sysfs-bus-coreboot#19d54020 firmware: google: Implement cbmem in sysfs driverThe CBMEM area is a downward-growing memory region used by coreboot todynamically allocate tagged data structures ("CBMEM entries") thatremain resident during boot.This implements a driver which exports access to the CBMEM entriesvia sysfs under /sys/bus/coreboot/devices/cbmem-<id>.This implementation is quite versatile. Examples of how it could beused are given below:* Tools like util/cbmem from the coreboot tree could use this driver instead of finding CBMEM in /dev/mem directly. Alternatively, firmware developers debugging an issue may find the sysfs interface more ergonomic than the cbmem tool and choose to use it directly.* The crossystem tool, which exposes verified boot variables, can use this driver to read the vboot work buffer.* Tools which read the BIOS SPI flash (e.g., flashrom) can find the flash layout in CBMEM directly, which is significantly faster than searching the flash directly.Write access is provided to all CBMEM regions via/sys/bus/coreboot/devices/cbmem-<id>/mem, as the existing cbmemtooling updates this memory region, and envisioned use cases withcrossystem can benefit from updating memory regions.Link: https://issuetracker.google.com/239604743Cc: Stephen Boyd <swboyd@chromium.org>Cc: Tzung-Bi Shih <tzungbi@kernel.org>Reviewed-by: Guenter Roeck <groeck@chromium.org>Reviewed-by: Julius Werner <jwerner@chromium.org>Tested-by: Jack Rosenthal <jrosenth@chromium.org>Signed-off-by: Jack Rosenthal <jrosenth@chromium.org>Link: https://lore.kernel.org/r/20221104161528.531248-1-jrosenth@chromium.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> List of files: /linux-6.15/Documentation/ABI/testing/sysfs-bus-coreboot Fri, 04 Nov 2022 16:15:28 +0000 Jack Rosenthal <jrosenth@chromium.org>