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Re: [Qemu-devel] Recursion in cpu_physical_memory_rw

From: Herbert Xu
Subject: Re: [Qemu-devel] Recursion in cpu_physical_memory_rw
Date: Thu, 16 Nov 2006 16:11:58 +1100
User-agent: Mutt/1.5.9i

On Wed, Nov 15, 2006 at 01:03:34PM -0600, Anthony Liguori wrote:
> >The scenario here is a compromised guest attempting to harm a host such
> >as Xen.
> The only "harm" done to a host is that the process will take as much CPU 
> as it can get.  This is really only a problem in Xen because the device 
> model is in Domain-0.  Once the device model is in a different domain, 
> it doesn't matter anymore as the normal scheduler parameters can be used 
> to ensure that no other hosts are harmed.

Actually it'll still be a problem in a driver domain unless it (and the
hardware) is dedicated to a single guest.

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