coreboot.git - my copy of coreboot

Age	Commit message (Collapse)	Author
2024-02-02	tests: Add some more ipchksum() test cases	Julius Werner
	This patch adds a few more test cases for the IP checksum algorithm to catch more possible corner cases (large data with more than 64K carries, unaligned data, checksum addition with offset, etc.). Change-Id: I39b4d3f1bb833894985649872329eec88a02a22c Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/80252 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Jakub Czapiga <czapiga@google.com>
2024-02-02	lib: Move IP checksum to commonlib	Julius Werner
	This patch moves the IP checksum algorithm into commonlib to prepare for it being shared with libpayload. The current implementation is ancient and pretty hard to read (and does some unnecessary questionable things like the type-punning stuff which leads to suboptimal code generation), so this reimplements it from scratch (that also helps with the licensing). This algorithm is prepared to take in a pre-calculated "wide" checksum in a machine-register-sized data type which is then narrowed down to 16 bits (see RFC 1071 for why that's valid). This isn't used yet (and the code will get optimized out), but will be used later in this patch series for architecture-specific optimization. Change-Id: Ic04c714c00439a17fc04a8a6e730cc2aa19b8e68 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/80251 Reviewed-by: Yidi Lin <yidilin@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jakub Czapiga <czapiga@google.com>