On Mon, Sep 09, 2013 at 03:58:36PM +0100, Peter Maydell wrote: > On 9 September 2013 15:51, Marcel Apfelbaum <marce...@redhat.com> wrote: > > On Mon, 2013-09-09 at 15:21 +0100, Peter Maydell wrote: > >> No, it's perfectly possible for a bus master transaction > >> to abort. The PC's host controller happens to be set up so > >> that bus master DMA covers the whole of the PCI memory space > >> and so it's probably not possible to get an abort on that > >> platform, but this isn't necessarily the case. For instance > >> the versatilePB's PCI controller only responds to accesses > >> within its programmed MMIO BAR ranges, so if the device > >> or the controller have been misconfigured you can get an > >> abort when the device tries to do DMA. (This usually causes > >> the device to decide something has gone seriously wrong. > > Thanks, I am not familiar with versatilePB, I may be able > > to code it, I don't know how to test it > > Don't worry about testing versatilePB particularly; you > just need to make sure your code can cope with master > aborts by device initiated transactions. > > -- PMM
Device in question being PCI host right? Just remove the assumption it's device 0...
