[PATCH v2] arm64: Allow for different DMA and CPU bus offsets

[catalin.marinas@arm.com (Catalin Marinas)]

On Wed, May 18, 2016 at 03:49:17PM +0200, Alexander Graf wrote:
> On 05/18/2016 03:27 PM, Catalin Marinas wrote:
> >On Wed, May 18, 2016 at 02:53:30PM +0200, Alexander Graf wrote:
> >>On arm64, all SoCs we supported so far either have an IOMMU or have bus
> >>addresses equal to CPU addresses.
> >>
> >>However, with the Raspberry Pi 3 coming up, this is no longer true. To
> >>allow DMA to work with an AArch64 kernel on those devices, let's allow
> >>devices to have DMA offsets again.
> >>
> >>Signed-off-by: Alexander Graf <agraf@suse.de>
> >We were aware about this issue but we've been waiting for an actual use
> >case. I'll queue this for 4.8 (given that RPi3 is not supported by the
> >arm64 kernel, I don't see the rush to merge it earlier).
> 
> Sure, works for me. That way Eric can try to push the other few bits
> necessary to run an arm64 kernel on the RPi3 towards 4.8 as well :).

As long as the firmware is PSCI capable ;)

-- 
Catalin