[PATCH] ArmVirtPkg: move all platforms to MdePkg/ BaseMemoryLib implementations

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

The BaseMemoryLibStm implementation under ArmPkg/ is being deprecated,
in favor of the generic versions under MdePkg, now that ARM and AARCH64
support has been added to both the generic C version (BaseMemoryLib) and
the accelerated version (BaseMemoryLibOptDxe). The latter uses unaligned
accesses and special cache maintenance instructions, and can therefore
not be used when the MMU is off.

So move to BaseMemoryLibOptDxe for the DXE phase and later, and to the
generic BaseMemoryLib before that.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 ArmVirtPkg/ArmVirt.dsc.inc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/ArmVirtPkg/ArmVirt.dsc.inc b/ArmVirtPkg/ArmVirt.dsc.inc
index 6c6a52b5e6fb..c624b3cdbecd 100644
--- a/ArmVirtPkg/ArmVirt.dsc.inc
+++ b/ArmVirtPkg/ArmVirt.dsc.inc
@@ -67,9 +67,8 @@ [LibraryClasses.common]
   #
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
 
-  # 1/123 faster than Stm or Vstm version
-  #BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
-  BaseMemoryLib|ArmPkg/Library/BaseMemoryLibStm/BaseMemoryLibStm.inf
+  # use the accelerated BaseMemoryLibOptDxe by default, overrides for SEC/PEI below
+  BaseMemoryLib|MdePkg/Library/BaseMemoryLibOptDxe/BaseMemoryLibOptDxe.inf
 
   # Networking Requirements
   NetLib|MdeModulePkg/Library/DxeNetLib/DxeNetLib.inf
@@ -154,6 +153,7 @@ [LibraryClasses.common]
 
 [LibraryClasses.common.SEC]
   PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+  BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
 
   DebugAgentLib|ArmPkg/Library/DebugAgentSymbolsBaseLib/DebugAgentSymbolsBaseLib.inf
   DefaultExceptionHandlerLib|ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLibBase.inf
@@ -165,6 +165,7 @@ [LibraryClasses.common.SEC]
 
 [LibraryClasses.common.PEI_CORE]
   PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
+  BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
   HobLib|MdePkg/Library/PeiHobLib/PeiHobLib.inf
   PeiServicesLib|MdePkg/Library/PeiServicesLib/PeiServicesLib.inf
   MemoryAllocationLib|MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
@@ -181,6 +182,7 @@ [LibraryClasses.common.PEI_CORE]
 
 [LibraryClasses.common.PEIM]
   PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
+  BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
   HobLib|MdePkg/Library/PeiHobLib/PeiHobLib.inf
   PeiServicesLib|MdePkg/Library/PeiServicesLib/PeiServicesLib.inf
   MemoryAllocationLib|MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
-- 
2.7.4