[Qemu-devel] Re: Status update

[Stefan Hajnoczi]

On Tue, Jun 29, 2010 at 6:25 PM, Eduard - Gabriel Munteanu
<address@hidden> wrote:
> On the other hand, we could just leave it alone for now. Changing
> mappings during DMA is stupid anyway: I don't think the guest can
> recover the results of DMA safely, even though it might be used on
> transfers in progress you simply don't care about anymore. Paul Brook
> suggested we could update the cpu_physical_memory_map() mappings
> somehow, but I think that's kinda difficult to accomplish.

A malicious or broken guest shouldn't be able to crash or corrupt QEMU
process memory.  The IOMMU can only map from bus addresses to guest
physical RAM (?) so the worst the guest can do here is corrupt itself?

Stefan