Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses

[Peter Maydell]

On 9 September 2013 17:54, Jan Kiszka <address@hidden> wrote:
> DMA requests from one device to another targeting anything else but
> RAM-backed regions will have to be rejected by QEMU in the future. We
> cannot map this sanely on a per-device locking model. The filtering will
> take place early in the memory core, to avoid any risk of deadlocking.
> No idea if reporting them as aborts will be easily feasible then.

Why is a DMA request any different from any other communication
between two devices?

-- PMM