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soc/intel/common: Check sizes of CSE CBFS RW blob and CSE RW BP 

The patch triggeres CrOS recovery mode if the sizes of CSE CBFS RW blob
and CSE RW boot are different.

TEST=Verified on drawcia.

Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Change-Id: I8be589eae905b1a54a8cf981ccd3a00bd5e733f5
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48423
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Jamie Ryu <jamie.m.ryu@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Sridhar Siricilla 2020-12-07 15:55:10 +05:30 committed by Tim Wawrzynczak
parent 20c8aa71d1
commit abeb688154
1 changed files with 8 additions and 0 deletions
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8
src/soc/intel/common/block/cse/cse_lite.c
View File

@ -74,6 +74,9 @@ enum csme_failure_reason {
/* CSE CBFS RW metadata is not found */
CSE_LITE_SKU_RW_METADATA_NOT_FOUND = 10,
/* CSE CBFS RW blob layout is not correct */
CSE_LITE_SKU_LAYOUT_MISMATCH_ERROR = 11,
};
/*
@ -674,6 +677,11 @@ static enum csme_failure_reason cse_update_rw(const struct cse_bp_info *cse_bp_i
const void *cse_cbfs_rw, const size_t cse_blob_sz,
struct region_device *target_rdev)
{
if (region_device_sz(target_rdev) < cse_blob_sz) {
printk(BIOS_ERR, "RW update does not fit. CSE RW flash region size: %zx, Update blob size:%zx\n",
region_device_sz(target_rdev), cse_blob_sz);
return CSE_LITE_SKU_LAYOUT_MISMATCH_ERROR;
}
if (!cse_erase_rw_region(target_rdev))
return CSE_LITE_SKU_FW_UPDATE_ERROR;