Re: [Xen-devel] [RFC PATCH linux-2.6.18-xen] pciback: clean up (MSI-X vec, entrynr) list when resetting PCI device

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 06/01/2011 06:25 PM, Andrew Jones wrote:
> >  When the guest is dead, the host has to take care. As long as the
> >  guest is alive, it ought to be responsible (and the host simply must
> >  not get in the way).
>
> As Laszlo stated, we can leave the security concerns out since we're
> talking about pci passthrough for pv guests. So malicious guests aside,
> there's still the scenario where a proprietary, broken (but works on
> bare-metal) driver comes along and messes things up. You then try to
> either reboot and re-passthrough to that same guest or even to a
> different guest that doesn't have a broken driver, but it now fails. Or,
> IOW, the host should guarantee that no domu (even ones running
> proprietary, broken code) can't ruin the day of another domu (or even
> its own day on a subsequent boot).
I think you're in violent agreement here.


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