[XS] Change in coreboot[main]: soc/intel/xeon_sp: Allocate resources above 4G

[Lean Sheng Tan (Code Review)]

Lean Sheng Tan has submitted this change. ( https://review.coreboot.org/c/coreboot/+/79058?usp=email )

Change subject: soc/intel/xeon_sp: Allocate resources above 4G
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soc/intel/xeon_sp: Allocate resources above 4G

This makes sure that prefetchable mem64 memory gets allocated above 4G
which allows non prefetchable resources to be allocated in the tight
window below 4G.

TEST=intel/archercity CRB

Signed-off-by: Arthur Heymans 
Change-Id: I27d4f9ce91c12ed4ab3b2f18f2a92b742115d275
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79058
Reviewed-by: Lean Sheng Tan 
Reviewed-by: Nico Huber 
Reviewed-by: Shuo Liu 
Tested-by: build bot (Jenkins) 
---
M src/soc/intel/xeon_sp/Kconfig
1 file changed, 3 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Lean Sheng Tan: Looks good to me, approved
  Nico Huber: Looks good to me, but someone else must approve
  Shuo Liu: Looks good to me, but someone else must approve

diff --git a/src/soc/intel/xeon_sp/Kconfig b/src/soc/intel/xeon_sp/Kconfig
index 63ced01..1eee869 100644
--- a/src/soc/intel/xeon_sp/Kconfig
+++ b/src/soc/intel/xeon_sp/Kconfig
@@ -91,6 +91,9 @@
 config ECAM_MMCONF_BUS_NUMBER
    default 256

+config ALWAYS_ALLOW_ABOVE_4G_ALLOCATION
+	default y
+
 config HEAP_SIZE
    hex
    default 0x80000