On Mon, Sep 22, 2008 at 11:36:19AM -0700, Arjan van de Ven wrote: > On Mon, 22 Sep 2008 20:21:12 +0200 > Joerg Roedel <[EMAIL PROTECTED]> wrote: > > > Hi, > > > > this patch series implements stackable dma_ops on x86. This is useful > > to be able to fall back to a different dma_ops implementation if one > > can not handle a particular device (as necessary for example with > > paravirtualized device passthrough or if a hardware IOMMU only > > handles a subset of available devices). > > isn't the right answer here to have a per device DMA ops instead ?
Its implemented using the per-device dma-ops already there. With this patches there is a list of available dma_ops implementations which are asked in a particular order if they can handle the device. The first implementation which returns true is assigned to the device as the per-device dma_ops structure. (Hmm, maybe the name stackable is misleading, is "dma_ops multiplexing" better?) Joerg -- | AMD Saxony Limited Liability Company & Co. KG Operating | Wilschdorfer Landstr. 101, 01109 Dresden, Germany System | Register Court Dresden: HRA 4896 Research | General Partner authorized to represent: Center | AMD Saxony LLC (Wilmington, Delaware, US) | General Manager of AMD Saxony LLC: Dr. Hans-R. Deppe, Thomas McCoy -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html