Re: [Xen-devel] [PATCH v7 7/8] xen/arm/arm64: introduce xen_arch_need_swiotlb

[David Vrabel]

On 03/11/14 10:45, Stefano Stabellini wrote:
> On Mon, 27 Oct 2014, Stefano Stabellini wrote:
>> Introduce an arch specific function to find out whether a particular dma
>> mapping operation needs to bounce on the swiotlb buffer.
>>
>> On ARM and ARM64, if the page involved is a foreign page and the device
>> is not coherent, we need to bounce because at unmap time we cannot
>> execute any required cache maintenance operations (we don't know how to
>> find the pfn from the mfn).
>>
>> No change of behaviour for x86.
>>
>> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
>> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> 
> Konrad, David, are you OK with the swiotlb-xen changes?

Reviewed-by: David Vrabel <david.vrabel@xxxxxxxxxx>

But swiotlb is Konrad's responsibility.

David
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