[XS] Change in coreboot[main]: soc/intel/xeon_sp/spr: Create CXL ACPI resources only for CXL IIO stacks

[Lean Sheng Tan (Code Review)]

Lean Sheng Tan has submitted this change. ( https://review.coreboot.org/c/coreboot/+/80087?usp=email )

Change subject: soc/intel/xeon_sp/spr: Create CXL ACPI resources only for CXL IIO stacks
......................................................................

soc/intel/xeon_sp/spr: Create CXL ACPI resources only for
CXL IIO stacks

When an IIO stack is connected with CXL cards, its bus range
will be divided by a PCI host bridge object and a CXL host
bridge object, otherwise, all its range will be owned by the
PCI host bridge object. Accordingly, CXL ACPI resources should
be only created when the IIO stack is connected with a CXL
card.

TEST=intel/archercity CRB

Change-Id: I6c1b1343991bc73d90a433d959f6618bbf59532f
Signed-off-by: Shuo Liu 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80087
Reviewed-by: Felix Held 
Tested-by: build bot (Jenkins) 
---
M src/soc/intel/xeon_sp/spr/soc_acpi.c
1 file changed, 3 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Shuo Liu: Looks good to me, but someone else must approve
  Felix Held: Looks good to me, approved

diff --git a/src/soc/intel/xeon_sp/spr/soc_acpi.c b/src/soc/intel/xeon_sp/spr/soc_acpi.c
index 9d2df2c..cb7fe1d 100644
--- a/src/soc/intel/xeon_sp/spr/soc_acpi.c
+++ b/src/soc/intel/xeon_sp/spr/soc_acpi.c
@@ -376,7 +376,9 @@

if (stack <= IioStack5) { // TYPE_UBOX_IIO
    			create_dsdt_iou_pci_resource(socket, stack, ri, stack_enabled);
-				create_dsdt_iou_cxl_resource(socket, stack, ri, stack_enabled);
+				if (is_iio_cxl_stack_res(ri))
+					create_dsdt_iou_cxl_resource(socket, stack, ri,
+						stack_enabled);
    			create_dsdt_stack_sta(socket, stack, ri, stack_enabled);
    		} else if (stack >= IioStack8 && stack <= IioStack11) { // TYPE_DINO
    			create_dsdt_dino_resource(socket, stack, ri, stack_enabled);