[PATCH 1/5] ARM: efi: apply strict permissons for UEFI Runtime Services regions

[Ard Biesheuvel]

On 2 March 2016 at 12:49, Matt Fleming <matt at codeblueprint.co.uk> wrote:
> On Mon, 22 Feb, at 03:25:54PM, Ard Biesheuvel wrote:
>> Recent UEFI versions expose permission attributes for runtime services
>> memory regions, either in the UEFI memory map or in the separate memory
>> attributes table.  This allows the kernel to map these regions with
>> stricter permissions, rather than the RWX permissions that are used by
>> default. So wire this up in our mapping routine.
>>
>> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
>> ---
>>  arch/arm/include/asm/efi.h |  1 +
>>  arch/arm/kernel/efi.c      | 41 ++++++++++++++++++++
>>  2 files changed, 42 insertions(+)
>
> Looks fine from an EFI perspective, but it would be nice for somebody
> else with ARM knowledge to ACK it.

I agree.

Note that the whole memory attribute series needs to wait for some
memremap() changes that I proposed for ARM (or at least the bits where
we wire it up for arm64+ARM)

Thanks,
Ard.