[coreboot-gerrit] Change in coreboot[master]: soc/amd/common/block: Add spi_hw mutex

[Marshall Dawson (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Julius Werner, Rob Barnes, Karthik Ramasubramanian, Felix Held.
Marshall Dawson has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58926 )

Change subject: soc/amd/common/block: Add spi_hw mutex
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Patch Set 2:

(1 comment)

Patchset:

PS2: 
I assume flash reads during DMA should be avoided too?  If so, are you guaranteeing that by using DMA to load cbfs files?  And again, if so, it seems there could be the potential for FSP to read it.  For example we pass in a pointer to MRC cache.