Hi All, Here is v7 of my patch-set to add support for EFI embedded fw to the kernel. v6 was posted a long time ago, around the 4.18 days. The long wait was for a suitable secure-hash for checking the firmware we find embedded in the EFI is the one we expect. With 5.4-rc1 we finally have a standalone sha256 lib, so that hurdle for this patch-set is now gone. I've tried to address all review-remarks against v6 in this new version: Changes in v7: - Split drivers/firmware/efi and drivers/base/firmware_loader changes into 2 patches - Use new, standalone, lib/crypto/sha256.c code - Address kdoc comments from Randy Dunlap - Add new FW_OPT_FALLBACK_PLATFORM flag and firmware_request_platform() _request_firmware() wrapper, as requested by Luis R. Rodriguez - Stop using "efi-embedded-firmware" device-property, now that drivers need to use the new firmware_request_platform() to enable fallback to a device fw copy embedded in the platform's main firmware, we no longer need a property on the device to trigger this behavior - Use security_kernel_load_data instead of calling security_kernel_read_file with a NULL file pointer argument - Move the docs to Documentation/driver-api/firmware/fallback-mechanisms.rst - Document the new firmware_request_platform() function in Documentation/driver-api/firmware/request_firmware.rst - Add 2 new patches for the silead and chipone-icn8505 touchscreen drivers to use the new firmware_request_platform() method - Rebased on top of 5.4-rc1 I guess this will probably need another round (ot two) of review + fixing, but eventually this can hopefully be merged. Since this touches a bunch of different subsystems the question is how to merge this? Most of the touched files outside of the firmware-loader code do not see a lot of churn, so my proposal would be to merge patches 1-6 through the tree which carries firmware-loader changes; and then provide an immutable branch for the platform/x86 maintainers to merge and then they can merge the last 2 patches (as the touchscreen_dmi.c file does see quite a bit of changes every release). Regards, Hans
