[edk2-devel] [RFC PATCH 11/11] ArmVirtPkg/ArmVirtQemu: Map all DRAM non-execute by default

[Ard Biesheuvel]

Now that both PEI and DXE can deal with memory being mapped non-execute
by default, update the early mapping code to create non-execute mappings
for all of DRAM. While at it, map the NOR flash read-only as well.

Signed-off-by: Ard Biesheuvel <a...@kernel.org>
---
 ArmVirtPkg/ArmVirtQemu.dsc                                 | 1 +
 ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoLib.c | 4 ++--
 ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf                | 2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/ArmVirtPkg/ArmVirtQemu.dsc b/ArmVirtPkg/ArmVirtQemu.dsc
index 449e73b9e1329111..7d159f27cfea8790 100644
--- a/ArmVirtPkg/ArmVirtQemu.dsc
+++ b/ArmVirtPkg/ArmVirtQemu.dsc
@@ -151,6 +151,7 @@ [PcdsFeatureFlag.common]
 [PcdsFixedAtBuild.common]
 !if $(ARCH) == AARCH64
   gArmTokenSpaceGuid.PcdVFPEnabled|1
+  
gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy|0xE000000000007FD5
 !endif
 
   gArmPlatformTokenSpaceGuid.PcdCPUCoresStackBase|0x4007c000
diff --git a/ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoLib.c 
b/ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoLib.c
index 23bd0fe68ef79d98..1ed5815989594ebd 100644
--- a/ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoLib.c
+++ b/ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoLib.c
@@ -91,7 +91,7 @@ ArmVirtGetMemoryMap (
   VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
   VirtualMemoryTable[0].VirtualBase  = VirtualMemoryTable[0].PhysicalBase;
   VirtualMemoryTable[0].Length       = *(UINT64 *)GET_GUID_HOB_DATA 
(MemorySizeHob);
-  VirtualMemoryTable[0].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
+  VirtualMemoryTable[0].Attributes   = 
ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK_XP;
 
   DEBUG ((
     DEBUG_INFO,
@@ -115,7 +115,7 @@ ArmVirtGetMemoryMap (
   VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
   VirtualMemoryTable[2].VirtualBase  = VirtualMemoryTable[2].PhysicalBase;
   VirtualMemoryTable[2].Length       = FixedPcdGet32 (PcdFvSize);
-  VirtualMemoryTable[2].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
+  VirtualMemoryTable[2].Attributes   = 
ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK_RO;
 
   // End of Table
   ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
diff --git a/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf 
b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
index 2039f71a0ebecd5d..6e70bf6eaa245b7a 100644
--- a/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
+++ b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
@@ -56,4 +56,4 @@ [FixedPcd]
   gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiLoaderData
 
 [Depex]
-  TRUE
+  gEdkiiMemoryAttributePpiGuid
-- 
2.39.2



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