src/intel/microcode: Add support for extended signature table

Microcode header supports advertising support for only one CPU
signature and processor flags. If there are multiple processor
families supported by this microcode blob, they are mentioned in
the extended signature table.

Add support to parse the extended processor signature table to
determine if the microcode blob supports the currently running CPU.

BUG=b:182234962
TEST=Booted ADL brya system with a processor whose signature/pf are
in the extended signature table of a microcode patch. Was able to
match and load the patch appropriately.

Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Change-Id: I1466caf4a4ba1f9a0214bdde19cce57dd65dacbd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54734
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

0 files changed, 0 insertions, 0 deletions