From: David Woodhouse <dwmw2@infradead.org>
To: Joerg Roedel <joro@8bytes.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
m.smarduch@samsung.com,
"ksummit-discuss@lists.linuxfoundation.org"
<ksummit-discuss@lists.linuxfoundation.org>
Subject: Re: [Ksummit-discuss] Short topic: virtio vs IOMMU
Date: Mon, 26 Oct 2015 13:48:02 +0900 [thread overview]
Message-ID: <1445834882.3405.30.camel@infradead.org> (raw)
In-Reply-To: <20151026044350.GE27420@8bytes.org>
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On Mon, 2015-10-26 at 05:43 +0100, Joerg Roedel wrote:
> But it would actually be neat to have at least the option to translate
> virtio DMA through an emulated IOMMU to be able to pass a virtio-device
> to a nested guest.
It would be useful to have an emulated IOMMU, full stop. And yeah, it
might actually make sense to *start* by using it for purely virtual
devices, and then graduate to doing it for passthrough (which will
finally mean we can stop having to pin *all* guest memory the moment we
assign a device, and we only have to pin those pages which are
referenced from the IOMMU page tables).
--
dwmw2
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next prev parent reply other threads:[~2015-10-26 4:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-26 2:55 Andy Lutomirski
2015-10-26 4:31 ` David Woodhouse
2015-10-26 4:43 ` Joerg Roedel
2015-10-26 4:48 ` David Woodhouse [this message]
2015-10-26 5:04 ` Joerg Roedel
2015-10-26 5:13 ` David Woodhouse
2015-10-26 5:20 ` Joerg Roedel
2015-10-26 6:03 ` Andy Lutomirski
2015-10-26 4:38 ` Joerg Roedel
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