[coreboot-gerrit] [S] Change in coreboot[main]: device/Kconfig: Add an option to allocate above 4G by default

[Arthur Heymans (Code Review)]

Attention is currently required from: Arthur Heymans, Chen, Gang C, Jincheng Li, Nico Huber, Paul Menzel, Shuo Liu.

Hello Chen, Gang C, Jincheng Li, Lean Sheng Tan, Nico Huber, Paul Menzel, Shuo Liu, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/78331?usp=email

to look at the new patch set (#19).

Change subject: device/Kconfig: Add an option to allocate above 4G by default
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device/Kconfig: Add an option to allocate above 4G by default

Historically resource allocation in coreboot was 32bit x86 thing. To
remain compatible with this behavior (e.g. to keep 32bit payloads
happy), resource allocation limits resources to 32 bits unless
explicitly overridden. However this behavior is not always appropriate:
e.g. on non x86 platforms the PCIe mem decode window could be above 4G.
Another case on x86 is where the decode window(s) below 4G are not
adequate for fitting all resources and the payload is 64bit
capable (e.g. Linux).

This adds a Kconfig flag to override the behavior to limit resources to
32bit by default and to allocate resources according to the real
hardware limits.

TEST=intel/archercity CRB

Signed-off-by: Arthur Heymans 
Change-Id: I01218a8a3efc4a5f8ba344808949ca6b8898525f
---
M src/device/Kconfig
M src/device/resource_allocator_v4.c
2 files changed, 10 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/31/78331/19