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lib/cbfs: Enable cbfs_cache for x86 

The reason cbfs_cache was disabled on x86 was due to the lack of
.data sections in the pre-RAM stages. By using
ENV_STAGE_HAS_DATA_SECTION we enable x86 to start using the cbfs_cache.

We still need to add a cbfs_cache region into the memlayout for it to
be enabled.

BUG=b:179699789
TEST=Build guybrush and verify cbfs_cache.size == 0.

Suggested-by: Julius Werner <jwerner@chromium.org>
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I74434ef9250ff059e7587147b1456aeabbee33aa
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56577
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
This commit is contained in:
Raul E Rangel 2021-10-08 13:10:38 -06:00 committed by Raul Rangel
parent 550bdc9050
commit 3d7b984f77
2 changed files with 12 additions and 11 deletions
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5
src/include/cbfs.h
View File

@ -111,12 +111,7 @@ int cbfs_prog_stage_load(struct prog *prog);
/*
* The shared memory pool for backing mapped CBFS files, and other CBFS allocation needs.
* On x86 platforms, this would only be needed to transparently map compressed files, but it
* would require a permanent CBMEM carveout to be safe to use during S3 resume. Since it's not
* clear whether this feature is necessary or worth the wasted memory, it is currently disabled
* but could be added behind a Kconfig later if desired.
*/
#define CBFS_CACHE_AVAILABLE (!CONFIG(ARCH_X86))
extern struct mem_pool cbfs_cache;
/*

18
src/lib/cbfs.c
View File

@ -18,8 +18,11 @@
#include <symbols.h>
#include <timestamp.h>
#if CBFS_CACHE_AVAILABLE
#if ENV_STAGE_HAS_DATA_SECTION
struct mem_pool cbfs_cache = MEM_POOL_INIT(_cbfs_cache, REGION_SIZE(cbfs_cache));
#else
struct mem_pool cbfs_cache = MEM_POOL_INIT(NULL, 0);
#endif
static void switch_to_postram_cache(int unused)
{
@ -28,7 +31,6 @@ static void switch_to_postram_cache(int unused)
REGION_SIZE(postram_cbfs_cache));
}
ROMSTAGE_CBMEM_INIT_HOOK(switch_to_postram_cache);
#endif
cb_err_t cbfs_boot_lookup(const char *name, bool force_ro,
union cbfs_mdata *mdata, struct region_device *rdev)
@ -111,8 +113,7 @@ void cbfs_unmap(void *mapping)
* that requires a free() for the boot_device, they need to implement it via the
* cbfs_cache mem_pool.
*/
if (CBFS_CACHE_AVAILABLE)
mem_pool_free(&cbfs_cache, mapping);
mem_pool_free(&cbfs_cache, mapping);
}
int cbfs_locate_file_in_region(struct cbfsf *fh, const char *region_name,
@ -319,8 +320,13 @@ void *_cbfs_alloc(const char *name, cbfs_allocator_t allocator, void *arg,
}
return mapping;
} else if (!CBFS_CACHE_AVAILABLE) {
ERROR("Cannot map compressed file %s on x86\n", mdata.h.filename);
} else if (!cbfs_cache.size) {
/*
* In order to use the cbfs_cache you need to add a CBFS_CACHE to your
* memlayout. For stages that don't have .data sections (x86 pre-RAM),
* it is not possible to add a CBFS_CACHE.
*/
ERROR("Cannot map compressed file %s without cbfs_cache\n", mdata.h.filename);
return NULL;
} else {
loc = mem_pool_alloc(&cbfs_cache, size);