On 12/12/08, Anthony Liguori <[email protected]> wrote: > Blue Swirl wrote: > > > On 12/12/08, Andrea Arcangeli <[email protected]> wrote: > > > > > > > From: Andrea Arcangeli <[email protected]> > > > > > > Add can_dma and post_dma methods needed before/after direct IO to guest > > > physical memory. > > > > > > Signed-off-by: Andrea Arcangeli <[email protected]> > > > > > > > > > > > > > > > + /* nonlinear range */ > > > + if (pd_first != pd) > > > + return NULL; > > > > > > > > > > In my tests on Sparc32, IOMMU can map a linear DVMA range to several > > non-linear physical pages, so this case should be handled correctly. > > > > > > I think we should go back to Fabrice's earliest suggestion here. We should > just have a simple map/unmap lock/unlock API for physical memory. That > should be the base API IMHO.
Beautiful! > As long the map function goes from guest physical => host virtual, it can > work for everything we care about. > > This is orthogonal to an API dealing with scatter/gather lists and > translation to and from them. So again we tried to solve too many problems at once. -- 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
