[M] Change in coreboot[master]: device/allocator: Allow for multiple domain resources of a type

[Nico Huber (Code Review)]

Attention is currently required from: Jonathan Zhang, Arthur Heymans, Felix Held.

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/67018 )

Change subject: device/allocator: Allow for multiple domain resources of a type
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Patch Set 6:

(1 comment)

File src/device/resource_allocator_v4.c:

https://review.coreboot.org/c/coreboot/+/67018/comment/26e89480_966dd6fe 
PS6, Line 317: 	if (res->flags & IORESOURCE_FIXED)
             : 			continue;
> haven't properly root-caused the behavior i've seen, but when having the IORESOURCE_FIXED flag set i […]

All fixed resources are avoided during allocation. It is our way to tell
the allocator that a resource range is already occupied (cf. constrain_
domain_resources()).

The "windows" you open for allocation shoudn't be fixed, and I assume
it's also not necessary to tag them subtractive. In ACPI terms, AIUI,
one could say all our *non-fixed domain* resources are "ResourceProducer"
while everything else is a "ResourceConsumer". And *non-fixed downstream*
resources need allocation.