[Xen-devel] Re: [GIT PULL] xen: swiotlb support for Xen dom0

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Ingo Molnar wrote:
> * Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
>
>   
> > Hi Ingo,
> >
> > This branch adds the swiotlb hooks for Xen dom0.  We use swiotlb 
> > to handle various device drivers which assume that multipage DMA 
> > transfers which are contigious in kernel memory are also 
> > contigious in machine memory (mostly lower-performance devices, as 
> > high-performance ones already do a good job of scatter-gather).
> > Following Fujita's suggestion, these changes remove a lot of the 
> > placeholder stubs in arch/x86/kernel/pci-swiotlb.c and moves them 
> > into the Xen-specific arch/x86/xen/pci-swiotlb.c.  (It still 
> > relies on overriding the weak functions defined in lib/swiotlb.c.)
> > The following changes since commit 2af252ab26150b4411889c9eaf1af4c5bf03de78:
> >   Jeremy Fitzhardinge (1):
> >         xen: checkpatch cleanups
> >     
> Would be nice to have a pull request for this with Fujita-san's acks 
> embedded in the commits, and with a tree based against tip:x86/xen.
>   
I will regenerate the branch with the acks (and Joerg made some comments 
which I'll address too).
   J

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