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ArmPkg: Drop individual memory permission helpers

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Now that we have a sane API to set and clear memory permissions that
works the same on ARM and AArch64, we no longer have a need for the
individual set/clear no-access/read-only/no-exec helpers so let's drop
them.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
This commit is contained in:
Ard Biesheuvel
2023-06-25 11:21:55 +02:00
committed by mergify[bot]
parent 7054f1a54e
commit 8a1f540596
4 changed files with 4 additions and 304 deletions
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104
ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibUpdate.c
View File

@@ -544,107 +544,3 @@ ArmSetMemoryAttributes (
TtEntryMask
);
}
EFI_STATUS
ArmSetMemoryRegionNoExec (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
{
return SetMemoryAttributes (
BaseAddress,
Length,
EFI_MEMORY_XP,
TT_DESCRIPTOR_SECTION_XN_MASK
);
}
EFI_STATUS
ArmClearMemoryRegionNoExec (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
{
return SetMemoryAttributes (
BaseAddress,
Length,
0,
TT_DESCRIPTOR_SECTION_XN_MASK
);
}
EFI_STATUS
ArmSetMemoryRegionReadOnly (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
{
return SetMemoryAttributes (
BaseAddress,
Length,
EFI_MEMORY_RO,
TT_DESCRIPTOR_SECTION_AP_MASK
);
}
EFI_STATUS
ArmClearMemoryRegionReadOnly (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
{
return SetMemoryAttributes (
BaseAddress,
Length,
0,
TT_DESCRIPTOR_SECTION_AP_MASK
);
}
/**
Convert a region of memory to read-protected, by clearing the access flag.
@param BaseAddress The start of the region.
@param Length The size of the region.
@retval EFI_SUCCESS The attributes were set successfully.
@retval EFI_OUT_OF_RESOURCES The operation failed due to insufficient memory.
**/
EFI_STATUS
ArmSetMemoryRegionNoAccess (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
{
return SetMemoryAttributes (
BaseAddress,
Length,
EFI_MEMORY_RP,
TT_DESCRIPTOR_SECTION_AF
);
}
/**
Convert a region of memory to read-enabled, by setting the access flag.
@param BaseAddress The start of the region.
@param Length The size of the region.
@retval EFI_SUCCESS The attributes were set successfully.
@retval EFI_OUT_OF_RESOURCES The operation failed due to insufficient memory.
**/
EFI_STATUS
ArmClearMemoryRegionNoAccess (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
{
return SetMemoryAttributes (
BaseAddress,
Length,
0,
TT_DESCRIPTOR_SECTION_AF
);
}