[PATCH] arm64: efi: ignore EFI_MEMORY_XP attribute if RP and/or WP are set

[Ard Biesheuvel]

On 15 September 2017 at 11:53, Stephen Boyd <sboyd at codeaurora.org> wrote:
> On 09/14, Ard Biesheuvel wrote:
>> The UEFI memory map is a bit vague about how to interpret the
>> EFI_MEMORY_XP attribute when it is combined with EFI_MEMORY_RP and/or
>> EFI_MEMORY_WP, which have retroactively been redefined as cacheability
>> attributes rather than permission attributes.
>>
>> So let's ignore EFI_MEMORY_XP if _RP and/or _WP are also set. In this
>> case, it is likely that they are being used to describe the capability
>> of the region (i.e., whether it has the controls to reconfigure it as
>> non-executable) rather than the nature of the contents of the region
>> (i.e., whether it contains data that we will never attempt to execute)
>>
>> Cc: Stephen Boyd <sboyd at codeaurora.org>
>
> Reported-by: Stephen Boyd <sboyd at codeaurora.org>
>
> I will test early next week and provide a tested-by. Thanks.
>

Great, thanks.