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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:40:19 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:40:19 +0000 |
commit | 9f0fc191371843c4fc000a226b0a26b6c059aacd (patch) | |
tree | 35f8be3ef04506ac891ad001e8c41e535ae8d01d /Documentation/ABI/testing/sysfs-class-firmware-attributes | |
parent | Releasing progress-linux version 6.6.15-2~progress7.99u1. (diff) | |
download | linux-9f0fc191371843c4fc000a226b0a26b6c059aacd.tar.xz linux-9f0fc191371843c4fc000a226b0a26b6c059aacd.zip |
Merging upstream version 6.7.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-firmware-attributes')
-rw-r--r-- | Documentation/ABI/testing/sysfs-class-firmware-attributes | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-firmware-attributes b/Documentation/ABI/testing/sysfs-class-firmware-attributes index f205d39409..9c82c7b42f 100644 --- a/Documentation/ABI/testing/sysfs-class-firmware-attributes +++ b/Documentation/ABI/testing/sysfs-class-firmware-attributes @@ -383,6 +383,36 @@ Description: Note that any changes to this attribute requires a reboot for changes to take effect. +What: /sys/class/firmware-attributes/*/attributes/save_settings +Date: August 2023 +KernelVersion: 6.6 +Contact: Mark Pearson <mpearson-lenovo@squebb.ca> +Description: + On Lenovo platforms there is a limitation in the number of times an attribute can be + saved. This is an architectural limitation and it limits the number of attributes + that can be modified to 48. + A solution for this is instead of the attribute being saved after every modification, + to allow a user to bulk set the attributes, and then trigger a final save. This allows + unlimited attributes. + + Read the attribute to check what save mode is enabled (single or bulk). + E.g: + # cat /sys/class/firmware-attributes/thinklmi/attributes/save_settings + single + + Write the attribute with 'bulk' to enable bulk save mode. + Write the attribute with 'single' to enable saving, after every attribute set. + The default setting is single mode. + E.g: + # echo bulk > /sys/class/firmware-attributes/thinklmi/attributes/save_settings + + When in bulk mode write 'save' to trigger a save of all currently modified attributes. + Note, once a save has been triggered, in bulk mode, attributes can no longer be set and + will return a permissions error. This is to prevent users hitting the 48+ save limitation + (which requires entering the BIOS to clear the error condition) + E.g: + # echo save > /sys/class/firmware-attributes/thinklmi/attributes/save_settings + What: /sys/class/firmware-attributes/*/attributes/debug_cmd Date: July 2021 KernelVersion: 5.14 |