[PATCH v3 4/5] arm64: mm: support additional contiguous kernel mapping region sizes

[Ard Biesheuvel]

On 14 October 2016 at 11:28, Catalin Marinas <catalin.marinas at arm.com> wrote:
> On Wed, Oct 12, 2016 at 12:23:44PM +0100, Ard Biesheuvel wrote:
>> Extend the basic support for kernel mappings using contiguous regions
>> by adding support for contiguous PUDs (4k granule only), either as a
>> discrete level or folded into the PGDs. In the same way, handle folded
>> PMDs so that contiguous PMDs (for 16k and 64k granule kernels) will
>> work as expected for 2 levels of translation as well.
>>
>> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
>> ---
>>  arch/arm64/include/asm/pgtable-hwdef.h |  6 +++
>>  arch/arm64/mm/mmu.c                    | 40 +++++++++++++++++++-
>>  2 files changed, 44 insertions(+), 2 deletions(-)
>
> After looking at this patch, I concluded it's not worth hassle as no
> hardware I'm aware of currently would benefit from it.  We can revisit
> it in the future if we hear otherwise.
>

That is what I expected, which is why this is a separate patch. I will
drop this patch and the next one from the next version of the series.