[coreboot-gerrit] Change in coreboot[master]: drivers/smmstore: Expose region device

[Arthur Heymans (Code Review)]

Attention is currently required from: Patrick Rudolph, Angel Pons.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62014 )

Change subject: drivers/smmstore: Expose region device
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Patch Set 4:

(1 comment)

File src/drivers/smmstore/store.c:

https://review.coreboot.org/c/coreboot/+/62014/comment/1fc13cfb_7cda89bb 
PS4, Line 67: lookup_store
> No, as the name incoherent_rdev_init implies it's not cache coherent. Writes might not be seen as the old region content is still in cache.

yes reads are done mmapped and writes via SPI controller. Should we always use rw to simplify things? In SMM the SPI flash is not cached anyways so I don't think there really performance concerns (was the reason why we use incoherent rdev iirc).