[PATCH V2] arm64: mm: Create gigabyte kernel logical mappings where possible
steve.capper at linaro.org
Tue May 6 03:16:19 PDT 2014
On Tue, May 06, 2014 at 10:58:53AM +0100, Catalin Marinas wrote:
> On Fri, May 02, 2014 at 04:17:09PM +0100, Steve Capper wrote:
> > We have the capability to map 1GB level 1 blocks when using a 4K
> > granule.
> > This patch adjusts the create_mapping logic s.t. when mapping physical
> > memory on boot, we attempt to use a 1GB block if both the VA and PA
> > start and end are 1GB aligned. This both reduces the levels of lookup
> > required to resolve a kernel logical address, as well as reduces TLB
> > pressure on cores that support 1GB TLB entries.
> > Signed-off-by: Steve Capper <steve.capper at linaro.org>
> I think you need to patch kern_addr_valid as well for this (we recently
> pushed a patch to detect pmd block mappings).
Ahh, I see it, thanks. I will amend the logic.
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