[M] Change in coreboot[main]: soc/intel/xeon_sp: Attach UBOX stacks

[Patrick Rudolph (Code Review)]

Attention is currently required from: Christian Walter, Johnny Lin, Nico Huber, Patrick Rudolph, Paul Menzel, Shuo Liu, Tim Chu.

Hello Arthur Heymans, Christian Walter, Felix Held, Johnny Lin, Lean Sheng Tan, Nico Huber, Paul Menzel, Shuo Liu, Tim Chu, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/80091?usp=email

to look at the new patch set (#8).

Change subject: soc/intel/xeon_sp: Attach UBOX stacks
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soc/intel/xeon_sp: Attach UBOX stacks

Attach UBOX stacks on newer generation Xeon-SP.
In order to use PCI drivers for UBOX devices, locating UBOX devices
by vendor and device IDs and replacing device access by specifying
S:B:D:F numbers, add a PCI domain for the UBOX stacks and let the
PCI enumerator index all devices.

Since there are no PCI BARs on the UBOX bus the PCI locator doesn't
have to assign resources on those buses.

Once all PCI devices on the UBOX stack can be located without knowing
their UBOX bus number and PCI segment the Xeon-SP code can fully
enable the multi PCI segment group support.

Test: ibm/sbp1 (4S) is able to find all PCU devices by PCI ID.

Change-Id: I8f9d52dd117364a42de1c73d39cc86dafeaf2678
Signed-off-by: Patrick Rudolph 
---
M src/soc/intel/xeon_sp/chip_common.c
M src/soc/intel/xeon_sp/cpx/soc_util.c
M src/soc/intel/xeon_sp/include/soc/util.h
M src/soc/intel/xeon_sp/skx/soc_util.c
M src/soc/intel/xeon_sp/spr/soc_util.c
5 files changed, 91 insertions(+), 13 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/91/80091/8