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

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH RFC v2 2/2] hw/pci: handle unassigned pci addresses
Date: Mon, 9 Sep 2013 17:58:18 +0100

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

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