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cbfs: Make cbfs_master_header_props() externally available 

This patch makes the CBFS default locator .locate() callback externally
available so that code which overrides cbfs_master_header_locator can
reuse or wrap it and doesn't have to copy&paste the whole thing. Use it
for the Eltan vendorcode implementation which previously did this.

Change-Id: I54dad5c8ea64ea0fc472217e275daa815736991e
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36797
Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Julius Werner 2019-11-12 15:13:12 -08:00
parent 44da9e73c7
commit 6abbd5b0ac
3 changed files with 5 additions and 43 deletions
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3
src/include/cbfs.h
View File

@ -73,6 +73,9 @@ struct cbfs_props {
size_t size;
};
/* Default CBFS locator .locate() callback that locates "COREBOOT" region. */
int cbfs_master_header_props(struct cbfs_props *props);
/* Return < 0 on error otherwise props are filled out accordingly. */
int cbfs_boot_region_properties(struct cbfs_props *props);

2
src/lib/cbfs.c
View File

@ -298,7 +298,7 @@ out:
}
/* This only supports the "COREBOOT" fmap region. */
static int cbfs_master_header_props(struct cbfs_props *props)
int cbfs_master_header_props(struct cbfs_props *props)
{
struct cbfs_header header;
const struct region_device *bdev;

43
src/vendorcode/eltan/security/verified_boot/vboot_check.c
View File

@ -17,7 +17,6 @@
#include <cbfs.h>
#include <vboot_check.h>
#include <vboot_common.h>
#include "fmap_config.h"
#define RSA_PUBLICKEY_FILE_NAME "vboot_public_key.bin"
@ -91,46 +90,6 @@ fail:
return -1;
}
static int vendor_secure_locate(struct cbfs_props *props)
{
struct cbfs_header header;
const struct region_device *bdev;
int32_t rel_offset;
size_t offset;
bdev = boot_device_ro();
if (bdev == NULL)
return -1;
size_t fmap_top = ___FMAP__COREBOOT_BASE + ___FMAP__COREBOOT_SIZE;
/* Find location of header using signed 32-bit offset from
* end of CBFS region. */
offset = fmap_top - sizeof(int32_t);
if (rdev_readat(bdev, &rel_offset, offset, sizeof(int32_t)) < 0)
return -1;
offset = fmap_top + rel_offset;
if (rdev_readat(bdev, &header, offset, sizeof(header)) < 0)
return -1;
header.magic = ntohl(header.magic);
header.romsize = ntohl(header.romsize);
header.offset = ntohl(header.offset);
if (header.magic != CBFS_HEADER_MAGIC)
return -1;
props->offset = header.offset;
props->size = header.romsize;
props->size -= props->offset;
printk(BIOS_SPEW, "CBFS @ %zx size %zx\n", props->offset, props->size);
return 0;
}
/*
*
* measure_item
@ -399,5 +358,5 @@ static void vendor_secure_prepare(void)
const struct cbfs_locator cbfs_master_header_locator = {
.name = "Vendorcode Header Locator",
.prepare = vendor_secure_prepare,
.locate = vendor_secure_locate
.locate = cbfs_master_header_props
};