Re: [Xen-devel] [PATCH 0/2] dma, x86, xen: fix dma_get_required_mask() when dma != phys address

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, May 12, 2014 at 11:15:40AM +0100, David Vrabel wrote:
> x86 uses the generic dma_get_required_mask() which assumes that DMA
> address == physical address.  For Xen PV guests this is not the case
> and certain drivers will cause excessive use of the SWIOTLB.
> 
> Patch #1 is a straight forward refactoring of a common function.
> 
> Patch #2 addes the required arch-specific implementation of
> dma_get_required_mask() to x86.

David,

Thank you for taking a look at that. If you would like, you can
tack on Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

And with the *SWIOTLB maintainer hat on - you can add that tag
as well.

Thanks!
> 
> David
> 

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