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ArmVirtPkg/ArmVirtQemu: Use read-only memory region type for code flash 

Map the code flash with read-only attributes so we can execute from it
even under a memory protection regime that enables WXN, making all
writable memory regions non-executable by default.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
This commit is contained in:
Ard Biesheuvel 2023-02-10 17:54:55 +01:00 committed by mergify[bot]
parent 8e934ab956
commit 03663c4319
1 changed files with 1 additions and 1 deletions
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2
ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoLib.c
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@ -115,7 +115,7 @@ ArmVirtGetMemoryMap (
VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFvBaseAddress); VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase; VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase;
VirtualMemoryTable[2].Length = FixedPcdGet32 (PcdFvSize); 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 // End of Table
ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR)); ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));