From: Paolo Bonzini <pbonzini@redhat.com>
To: Andrew Jones <drjones@redhat.com>
Cc: xen-devel@lists.xensource.com, Laszlo Ersek <lersek@redhat.com>,
Jan Beulich <JBeulich@novell.com>
Subject: Re: [RFC PATCH linux-2.6.18-xen] pciback: clean up (MSI-X vec, entrynr) list when resetting PCI device
Date: Wed, 01 Jun 2011 18:27:17 +0200 [thread overview]
Message-ID: <4DE66865.4000502@redhat.com> (raw)
In-Reply-To: <1818654223.418514.1306945550994.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com>
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.
next prev parent reply other threads:[~2011-06-01 16:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-01 10:05 [RFC PATCH linux-2.6.18-xen] pciback: clean up (MSI-X vec, entrynr) list when resetting PCI device Laszlo Ersek
2011-06-01 11:02 ` Laszlo Ersek
2011-06-01 14:31 ` Konrad Rzeszutek Wilk
2011-06-01 16:18 ` Paolo Bonzini
2011-06-01 17:32 ` Laszlo Ersek
2011-06-01 18:13 ` 2.6.38 (FC15) with PCI passthrough fails mysteriously with iommu=soft Konrad Rzeszutek Wilk
2011-06-02 7:42 ` Laszlo Ersek
2011-06-02 20:49 ` Pasi Kärkkäinen
2011-06-01 12:56 ` [RFC PATCH linux-2.6.18-xen] pciback: clean up (MSI-X vec, entrynr) list when resetting PCI device Jan Beulich
2011-06-01 14:12 ` Laszlo Ersek
2011-06-01 14:59 ` Jan Beulich
2011-06-01 15:27 ` Laszlo Ersek
2011-06-01 16:07 ` Jan Beulich
2011-06-01 16:25 ` Andrew Jones
2011-06-01 16:27 ` Paolo Bonzini [this message]
2011-06-01 16:16 ` Paolo Bonzini
2011-06-01 14:51 ` Konrad Rzeszutek Wilk
2011-06-01 15:01 ` Konrad Rzeszutek Wilk
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