[edk2-devel] [PATCH v3 22/26] ArmVirtPkg: Apply Memory Protections via SetMemoryProtectionsLib

["Taylor Beebe" <taylor.d.beebe@gmail.com>]

Set the memory protections on Arm virtual platforms. Because
the QemuFg parser is not currently available in ArmVirtPkg, use
the RELEASE profile by default.

Signed-off-by: Taylor Beebe <taylor.d.beebe@gmail.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
---
 ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c   | 11 +++++++++--
 ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf |  1 +
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c
index ef88a9df1d62..90718d05abe8 100644
--- a/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c
+++ b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c
@@ -11,6 +11,7 @@
 #include <Library/ArmPlatformLib.h>
 #include <Library/DebugLib.h>
 #include <Library/HobLib.h>
+#include <Library/SetMemoryProtectionsLib.h>
 #include <Library/PeimEntryPoint.h>
 #include <Library/PeiServicesLib.h>
 #include <Library/PcdLib.h>
@@ -76,8 +77,9 @@ InitializeMemory (
   IN CONST EFI_PEI_SERVICES     **PeiServices
   )
 {
-  UINTN       UefiMemoryBase;
-  EFI_STATUS  Status;
+  UINTN                           UefiMemoryBase;
+  EFI_STATUS                      Status;
+  DXE_MEMORY_PROTECTION_SETTINGS  DxeSettings;
 
   ASSERT (FixedPcdGet64 (PcdSystemMemoryBase) < (UINT64)MAX_ALLOC_ADDRESS);
 
@@ -100,5 +102,10 @@ InitializeMemory (
              );
   ASSERT_EFI_ERROR (Status);
 
+  DxeSettings                                      = DxeMemoryProtectionProfiles[DxeMemoryProtectionSettingsRelease].Settings;
+  DxeSettings.NullPointerDetection.DisableEndOfDxe = TRUE;
+
+  SetDxeMemoryProtectionSettings (&DxeSettings, DxeMemoryProtectionSettingsRelease);
+
   return Status;
 }
diff --git a/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
index 2039f71a0ebe..d13325a89e14 100644
--- a/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
+++ b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
@@ -34,6 +34,7 @@ [LibraryClasses]
   ArmLib
   ArmPlatformLib
   MemoryInitPeiLib
+  SetMemoryProtectionsLib
 
 [Guids]
   gEfiMemoryTypeInformationGuid
-- 
2.42.0.windows.1



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