From: Avi Kivity <avi@redhat.com>
To: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>,
kvm@vger.kernel.org, Amit Shah <amit.shah@redhat.com>,
"Kay, Allen M" <allen.m.kay@Intel.Com>,
Ben-Ami Yassour1 <BENAMI@il.ibm.com>
Subject: Re: [PATCH] VT-d: Fix iommu map page for mmio pages
Date: Sat, 27 Sep 2008 13:24:31 +0300 [thread overview]
Message-ID: <48DE09DF.2050400@redhat.com> (raw)
In-Reply-To: <20080926235730.GE9118@il.ibm.com>
Muli Ben-Yehuda wrote:
>> MMIO isn't just a register window. It may be an on-device buffer.
>>
>
> Unlikely, but ok.
>
>
It's unlikely in the same ways graphics cards are unlikely :)
With a multi-card setup, perhaps it is even reasonable for one card to
dma to another.
> I strongly disagree. You are advocating something that is potentially
> unsafe---for the sake of code simplicity?! I am advocating caution in
> what we let an *untrusted* guest do.
>
Why would it be unsafe?
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2008-09-27 10:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-19 7:15 [PATCH] VT-d: Fix iommu map page for mmio pages Han, Weidong
2008-09-25 10:27 ` Avi Kivity
2008-09-25 13:44 ` Han, Weidong
2008-09-25 13:58 ` Avi Kivity
2008-09-25 14:07 ` Han, Weidong
2008-09-25 14:45 ` Avi Kivity
2008-09-25 15:04 ` Anthony Liguori
2008-09-25 15:19 ` Han, Weidong
2008-09-25 21:14 ` Muli Ben-Yehuda
2008-09-25 21:51 ` Anthony Liguori
2008-09-26 23:57 ` Muli Ben-Yehuda
2008-09-27 10:24 ` Avi Kivity [this message]
2008-09-28 6:07 ` Muli Ben-Yehuda
2008-09-28 8:45 ` Avi Kivity
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