0421ef2cd8
This adds zstd support to cbfstool. The code is taken from zstd-1.5.7 with modifications: - renaming bits.h to zstd_bits.h to avoid conflicts with coreboot's bits.h used on riscv - renaming compiler.h to zstd_compiler.h to avoid conflicts with coreboot's compiler.h - Dropped all streaming API functions - Dropped multithreaded support, since it's now unused - Dropped local DDict support zstd offers similar compression ratios to LZMA, but a vastly fast decompress speed. Typically zstd results in slightly larger binaries than LZMA. Whether zstd should then be preferred over LZMA depends on a few things: - Caching: When loading from memory mapped boot devices, zstd will read the boot medium multiple times, while LZMA will not. If the memory mapped boot medium is not cached zstd results in much slower decompression. - Boot medium speed: Often, but not always LZMA results in smaller binaries. If the boot medium is the bottleneck, than loading smaller binaries might actually be faster. On a fast boot medium (high spi freq, using quad/dual io), the performance benefits from zstd might be more substantial - zstd decompression code has a much larger footprint than LZMA. If the stage (postcar) is loaded in uncached memory the size increase might slow things down. On QEMU Q35 postcar .text section size doubled, while heap section has growen by 50%. - zstd uses a lot of .bss (CTX is about 32KiB large). This might not be available in some environments. Orignal commit from 2022 was using zstd-1.5.2. Updated to zstd-1.5.7. Change-Id: I34508268f8767008ef25cb9e466d201345881232 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/69753 Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Matt DeVillier <matt.devillier@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __CBFS_H
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#define __CBFS_H
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#include "common.h"
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#include <commonlib/bsd/cbfs_serialized.h>
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/* To make CBFS more friendly to ROM, fill -1 (0xFF) instead of zero. */
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#define CBFS_CONTENT_DEFAULT_VALUE (-1)
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#define CBFS_HEADPTR_ADDR_X86 0xFFFFFFFC
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/* cbfstool is allowed to use this constant freely since it's not part of the
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CBFS image, so make an alias for the name that's a little less aggressive. */
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#define METADATA_HASH_ANCHOR_MAGIC \
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DO_NOT_USE_METADATA_HASH_ANCHOR_MAGIC_DO_NOT_USE
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struct typedesc_t {
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uint32_t type;
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const char *name;
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};
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static const struct typedesc_t types_cbfs_compression[] = {
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{CBFS_COMPRESS_NONE, "none"},
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{CBFS_COMPRESS_LZMA, "LZMA"},
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{CBFS_COMPRESS_LZ4, "LZ4"},
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{CBFS_COMPRESS_ZSTD, "ZSTD"},
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{0, NULL},
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};
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static struct typedesc_t filetypes[] unused = {
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{CBFS_TYPE_BOOTBLOCK, "bootblock"},
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{CBFS_TYPE_CBFSHEADER, "cbfs header"},
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{CBFS_TYPE_LEGACY_STAGE, "legacy stage"},
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{CBFS_TYPE_STAGE, "stage"},
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{CBFS_TYPE_SELF, "simple elf"},
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{CBFS_TYPE_FIT_PAYLOAD, "fit_payload"},
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{CBFS_TYPE_OPTIONROM, "optionrom"},
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{CBFS_TYPE_BOOTSPLASH, "bootsplash"},
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{CBFS_TYPE_RAW, "raw"},
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{CBFS_TYPE_VSA, "vsa"},
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{CBFS_TYPE_MBI, "mbi"},
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{CBFS_TYPE_MICROCODE, "microcode"},
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{CBFS_TYPE_INTEL_FIT, "intel_fit"},
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{CBFS_TYPE_FSP, "fsp"},
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{CBFS_TYPE_MRC, "mrc"},
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{CBFS_TYPE_CMOS_DEFAULT, "cmos_default"},
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{CBFS_TYPE_CMOS_LAYOUT, "cmos_layout"},
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{CBFS_TYPE_SPD, "spd"},
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{CBFS_TYPE_MRC_CACHE, "mrc_cache"},
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{CBFS_TYPE_MMA, "mma"},
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{CBFS_TYPE_EFI, "efi"},
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{CBFS_TYPE_STRUCT, "struct"},
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{CBFS_TYPE_DELETED, "deleted"},
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{CBFS_TYPE_NULL, "null"},
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{CBFS_TYPE_AMDFW, "amdfw"},
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{0, NULL}
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};
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#define CBFS_SUBHEADER(_p) ((void *) ((((uint8_t *) (_p)) + be32toh((_p)->offset))))
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static inline size_t cbfs_file_attr_hash_size(enum vb2_hash_algorithm algo)
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{
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return offsetof(struct cbfs_file_attr_hash, hash.raw) +
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vb2_digest_size(algo);
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}
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/* cbfs_image.c */
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uint32_t get_cbfs_entry_type(const char *name, uint32_t default_value);
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uint32_t get_cbfs_compression(const char *name, uint32_t unknown);
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/* cbfs-mkpayload.c */
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void xdr_segs(struct buffer *output,
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struct cbfs_payload_segment *segs, int nseg);
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void xdr_get_seg(struct cbfs_payload_segment *out,
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struct cbfs_payload_segment *in);
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/* platform_fixups.c */
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typedef int (*platform_fixup_func)(struct buffer *buffer, size_t offset);
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platform_fixup_func platform_fixups_probe(struct buffer *buffer, size_t offset,
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const char *region_name);
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#endif
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