[PATCH] efi_loader: Fix loaded image alignment

[Vincent Stehlé]

On Mon, Oct 11, 2021 at 03:10:23PM +0300, Ilias Apalodimas wrote:
> We are ignoring the alignment communicated via the PE/COFF header.
> Starting 5.10 the Linux kernel will loudly complain about it. For more
> details look at [1] (in linux kernel).
> 
> So add a function that can allocate aligned EFI memory and use it for our
> relocated loaded image.

Hi Ilias,

Thank you for this fix.

I verified that Linux v5.14.3 EFI stub complains about not being aligned to 64k
without this fix and is happy with it, on the following systems:

- qemu with U-Boot latest (after v2021.10)
- Pine64 ROCKPro64 with U-Boot "near" v2021.07[1]
- Lenovo Leez P710 with U-Boot v2021.07[2]
- Compulab IOT-GATE-iMX8 with U-Boot "near" v2021.10-rc3[3]

Feel free to add (or not):

  Tested-by: Vincent Stehlé <vincent.stehle at arm.com>

Best regards,

Vincent Stehlé
System Architect - Arm

[1]: https://gitlab.arm.com/systemready/firmware-build/rk3399-manifest/-/blob/rockpro64-21.09/README.md
[2]: https://gitlab.arm.com/systemready/firmware-build/rk3399-manifest/-/blob/leez-21.08/README.md
[3]: https://git.linaro.org/people/paul.liu/systemready/build-scripts.git/tree/docs/iotgateimx8_building_running.md