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authorKarthikeyan Ramasubramanian <kramasub@google.com>2023-04-10 17:46:41 -0600
committerKarthik Ramasubramanian <kramasub@google.com>2023-04-19 19:09:47 +0000
commite4fd7dc9ff7ff6cd5dac32f27bd069d9d350f275 (patch)
tree934f2edeb16d336cc3101d5d4451a9a3e038cc05 /MAINTAINERS
parentea68fa0b2387be67ab1c77f4e12b31c231b93eff (diff)
soc/amd/common/block/lpc/spi_dma: Leverage CBFS_CACHE when using SPI DMA
CBFS library performs memory mapped access of the files during loading, verification and de-compression. Even with MTRRs configured correctly, first few file access through memory map are taking longer times to load. Update the SPI DMA driver to load the files into CBFS cache, so that they can be verified and de-compressed with less overhead. This saves ~60 ms in boot time. BUG=None TEST=Build Skyrim BIOS image and boot to OS. Observe ~60 ms improvement with the boot time. Performing additional test to confirm there are no regressions. Before: ======= 970:loading FSP-M 15:starting LZMA decompress (ignore for x86) 760,906 (60,035) 16:finished LZMA decompress (ignore for x86) 798,787 (37,881) 8:starting to load ramstage 17:starting LZ4 decompress (ignore for x86) 1,050,093 (13,790) 18:finished LZ4 decompress (ignore for x86) 1,054,086 (3,993) 971:loading FSP-S 17:starting LZ4 decompress (ignore for x86) 1,067,778 (3,313) 18:finished LZ4 decompress (ignore for x86) 1,068,022 (244) 90:starting to load payload 17:starting LZ4 decompress (ignore for x86) 1,302,155 (11,285) 18:finished LZ4 decompress (ignore for x86) 1,303,938 (1,783) After: ====== 970:loading FSP-M 15:starting LZMA decompress (ignore for x86) 709,542 (12,178) 16:finished LZMA decompress (ignore for x86) 739,379 (29,837) 8:starting to load ramstage 17:starting LZ4 decompress (ignore for x86) 1,001,316 (12,368) 18:finished LZ4 decompress (ignore for x86) 1,001,971 (655) 971:loading FSP-S 17:starting LZ4 decompress (ignore for x86) 1,016,514 (3,031) 18:finished LZ4 decompress (ignore for x86) 1,016,722 (207) 90:starting to load payload 17:starting LZ4 decompress (ignore for x86) 1,244,602 (10,313) 18:finished LZ4 decompress (ignore for x86) 1,244,831 (228) Change-Id: Ie30b6324f9977261c60e55ed509e979ef290f1f1 Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/74334 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com> Reviewed-by: Tim Van Patten <timvp@google.com> Reviewed-by: Raul Rangel <rrangel@chromium.org>
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