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

[Eric Anholt]

Catalin Marinas <catalin.marinas at arm.com> writes:

> 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 at 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).

Sounds good to me.  I'm looking forward to getting the other pieces in
place for 4.8.
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