CB_MEM_TAG is considered as an reserved memory. But we want to mange
this region in the payload and release this region when MTE is inactive.
Add CB_MEM_TAG memory range to usedmem_ranges to get a page table
mapping and mark it as used.
BUG=b:438666196,b:474306129
TEST=Check the tag region is wiped out in DEV mode.
Change-Id: I498407cbd44b1cc70ef769a63b8e40665ea67b28
Signed-off-by: Yidi Lin <yidilin@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90702
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
e705c39009