On Tue, 13 Apr 2021 16:03:51 +0100,
Peter Geis <pgwipe...@gmail.com> wrote:
>
> On Tue, Apr 13, 2021 at 10:01 AM Marc Zyngier <m...@kernel.org> wrote:
[...]
> > What happens if you hack all the allocations to happen in the low 4GB
> > of the PA space?
>
> It seems to work correctly.
> The downstream hacks used GFP_DMA32 which gets discarded by
> kmalloc_fix_flags on certain allocations.
> Switching to GFP_DMA seems to have satisfied it, but it feels wrong
> using this code.
> Need to check the corner cases to make sure I'm not missing something.
The problem is that GFP_DMA doesn't always mean the same thing.
Overall, we need to hear from Rockchip about the exact nature of the
problem, and then we *may* be able to work something out.
I'd also like to understand whether it is broken because you happen to
have pre-release silicon that will never make it into the wild, or if
this is the real thing that is going to ship on millions of devices.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
