Messages in this thread | | | From | Amit Shah <> | Subject | Re: [kvm-devel] [PATCH 3/8] KVM: PVDMA Guest: Guest-side routines for paravirtualized DMA | Date | Mon, 12 Nov 2007 17:26:24 +0530 |
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On Monday 12 November 2007 16:20:01 Muli Ben-Yehuda wrote: > On Wed, Nov 07, 2007 at 04:21:04PM +0200, Amit Shah wrote: > > We make the dma_mapping_ops structure to point to our structure so > > that every DMA access goes through us. (This is the reason this only > > works for 64-bit guest. 32-bit guest doesn't yet have a dma_ops > > struct.) > > I need the same facility for Calgary for falling back to swiotlb if a > translation is disabled on some slot, and IB needs the same facility > for some IB adapters (e.g., ipath). Perhaps it's time to consider > stackable dma-ops (unless someone has a better idea...).
That would make great sense and simplify implementations.
How do you propose such an implementation? An array of function pointers for each possible call?
> > Cheers, > Muli
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