[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] swiotlb and Xen query?
[snip] > > > That was really very informative Mats. > Thanks you very much for the help. > So, i guess swiotlb comes into picture only if there is a DMA > transfer from a domU whose p2m mapping turns out to be above > the 4GB( assuming device to be 32 bit) of the machine memory. > Other wise just normal p2m mapping is enough to find the > actual machine address, which can be handed over to the > device for DMAing. Am i right? Yes, that's pretty much how it works. In theory, it could be that devices only work on a 31, 28 or some other number of bit-range, but yes, that's the principle. -- Mats > > Thank you once again for the patience. > > Regards > ~psr > [snip] _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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