ArmPkg/BdsLib: Removed PSCI discoverability from the Linux loader

Some platforms might decide to not support PSCI in their FDT-aware Linux
system even if their firmware supports it.
It is the responsibility of the platform engineer to provide the appropriate FDT.

The PCD gArmTokenSpaceGuid.PcdArmPsciSupport is not required anymore.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15658 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc

@@ -72,10 +72,6 @@
   #  It could be set FALSE to save size.
   gEfiMdeModulePkgTokenSpaceGuid.PcdConOutGopSupport|TRUE
 
-  ## FVP platforms support hardware power control
-  # Disabled for now as we have a version mismatch.
-  gArmTokenSpaceGuid.PcdArmPsciSupport|FALSE
-
 [PcdsFixedAtBuild.common]
   gArmPlatformTokenSpaceGuid.PcdFirmwareVendor|"ARM Fixed Virtual Platform"
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPrompt|"ARM-FVP"

ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-RTSM-AEMv8Ax4.dsc

@@ -60,16 +60,19 @@
 ################################################################################
 
 [PcdsFeatureFlag.common]
-
 !ifdef $(EDK2_SKIP_PEICORE)
   gArmPlatformTokenSpaceGuid.PcdSystemMemoryInitializeInSec|TRUE
   gArmPlatformTokenSpaceGuid.PcdSendSgiToBringUpSecondaryCores|TRUE
 !endif
- 
+
   ## If TRUE, Graphics Output Protocol will be installed on virtual handle created by ConsplitterDxe.
   #  It could be set FALSE to save size.
   gEfiMdeModulePkgTokenSpaceGuid.PcdConOutGopSupport|TRUE
- 
+
+  # UEFI firmware is responsible to park the secondary cores on this platform.
+  # This PCD ensures the secondary cores are parked into the AArch64 Linux parking protocol.
+  gArmTokenSpaceGuid.PcdArmLinuxSpinTable|TRUE
+
 [PcdsFixedAtBuild.common]
   gArmPlatformTokenSpaceGuid.PcdFirmwareVendor|"ARM Versatile Express"
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPrompt|"ArmVExpress-RTSM"