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

[sboyd@codeaurora.org (Stephen Boyd)]

On 09/15, Ard Biesheuvel wrote:
> On 15 September 2017 at 11:53, Stephen Boyd <sboyd@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@codeaurora.org>
> >
> > Reported-by: Stephen Boyd <sboyd@codeaurora.org>
> >
> > I will test early next week and provide a tested-by. Thanks.
> >
> 
> Great, thanks.
>

Tested-by: Stephen Boyd <sboyd@codeaurora.org>

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