Relying on page tables being in RO flash is not safe in every setup,
therefore set up some page tables in SMRAM that the permanent smihandler
can use.
Tested on QEMU.
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: Icb3086abd577b9abb9966dd910a264a873ace4ed
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80336
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Benjamin Doron <benjamin.doron00@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
7a51acfbe9