[U-Boot] [PATCH v4 19/21] sandbox: Allow to execute from RAM

[Simon Glass]

Hi Alex,

On 18 June 2018 at 09:23, Alexander Graf <agraf at suse.de> wrote:
> With efi_loader, we may want to execute payloads from RAM. By default,
> permissions on the RAM region don't allow us to execute from there though.
>
> So whenever we get into the efi_loader case, let's mark RAM as executable.
> That way we still protect normal cases, but allow for efi binaries to
> directly get executed from within RAM.
>
> For this, we hook into the already existing allow_unaligned() call which
> also transitions the system over into semantics required by the UEFI
> specification.
>
> Signed-off-by: Alexander Graf <agraf at suse.de>
> ---
>  arch/sandbox/cpu/cpu.c | 14 ++++++++++++++
>  arch/sandbox/cpu/os.c  | 14 ++++++++++++++
>  include/os.h           | 19 +++++++++++++++++++
>  3 files changed, 47 insertions(+)
>

What is this patch actually for? Does it make something work that did
not before? Where is it called?

Regards.
Simon