[PATCH v2 4/4] arm64: mm: tidy up top of kernel VA space

[Steve Capper]

On 08/10/2020 16:36, Ard Biesheuvel wrote:
> Tidy up the way the top of the kernel VA space is organized, by mirroring
> the 256 MB region we have below the vmalloc space, and populating it top
> down with the PCI I/O space, some guard regions, and the fixmap region.
> The latter region is itself populated top down, and today only covers
> about 4 MB, and so 224 MB is ample, and no guard region is therefore
> required.
> 
> The resulting layout is identical between 48-bit/4k and 52-bit/64k
> configurations.

Nice! :-)

> 
> Signed-off-by: Ard Biesheuvel <ardb at kernel.org>

Reviewed-by: Steve Capper <steve.capper at arm.com>

Cheers,
--
Steve