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

From: [email-masked] (David Vrabel)
Date: Mon, 3 Nov 2014 11:01:49 +0000

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 <[email-masked]>
>> Acked-by: Ian Campbell <[email-masked]>
> 
> Konrad, David, are you OK with the swiotlb-xen changes?

Reviewed-by: David Vrabel <[email-masked]>

But swiotlb is Konrad's responsibility.

David