tree 9f9987f2ea3ebfb1bb4f051fb7cd4d61632dffee
parent 31f502a6be09aee21dfca92b0400f17e5f47c045
author Johnny Lin <johnny_lin@wiwynn.com> 1681198202 +0800
committer Lean Sheng Tan <sheng.tan@9elements.com> 1681372583 +0000

soc/intel/xeon_sp: Fix very small total memory when CXL is enabled

Processor attached memory should not use reserved_ram_from_to and
treat the calculation of gi_mem_size size as 64MB.

By default SOC_INTEL_HAS_CXL is enabled for Sapphire Rapids platforms,
this should fix small total memory issue. Before the fix running
command 'free -g -h' under Linux shows the total memory is only 1.4Gi,
after the fix it's showing the expected total memory size 15Gi.

Tested=On AC without attaching CXL memory, the total memory size is
the same as de-selecting SOC_INTEL_HAS_CXL.
On OCP Crater Lake with CXL memory attached, CXL memory can be recognized
in NUMA node 1:
numactl -H
available: 2 nodes (0-1)
node 0 cpus: 0 1 2 3 4 5 6 .. 59
node 0 size: 95854 MB
node 0 free: 93860 MB
node 1 cpus:
node 1 size: 63488 MB
node 1 free: 63488 MB
node distances:
node   0   1
  0:  10  14
  1:  14  10

Change-Id: I38e9d138fd284620ac616a65f444e943f1774869
Signed-off-by: Johnny Lin <johnny_lin@wiwynn.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74296
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Shuo Liu <shuo.liu@intel.com>
Reviewed-by: Johnny Lin <Johnny_Lin@wiwynn.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>