[PATCH 06/10] arm64: Update booting.txt to reserved-memory nodes

Grant Likely grant.likely at linaro.org
Fri Oct 24 04:04:00 PDT 2014


On Fri, Oct 24, 2014 at 11:54 AM, Mark Rutland <mark.rutland at arm.com> wrote:
>
> On Fri, Oct 24, 2014 at 12:10:58AM +0100, Geoff Levand wrote:
> > Change any reference of device tree '/memreserve/' entries in the arm64
> > booting.txt to refer to 'reserved-memory nodes'.  Reserved-memory nodes
> > are the preferred method of specifying reserved memory.
>
> Per my comments on patch 5, I don't think this change is sufficient.
>
> However, we should probably update the document to allow reserved-memory
> nodes.
>
> On an unrelated note we probably need to work out how reserved-memory
> interacts with the UEFI memory map -- unmappable regions shouldn't be
> described by UEFI and I hope people don't use reserved-memory as a
> workaround for broken UEFI tables.


When booting with UEFI, the boot stub will clear out all memory nodes
and (should) clear out reserved regions so that the kernel can use the
UEFI memory map as authoritative.

g.



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