From: Andy Lutomirski <luto@amacapital.net>
To: Joerg Roedel <joro@8bytes.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
ksummit-discuss@lists.linuxfoundation.org,
m.smarduch@samsung.com
Subject: Re: [Ksummit-discuss] Short topic: virtio vs IOMMU
Date: Sun, 25 Oct 2015 23:03:41 -0700 [thread overview]
Message-ID: <CALCETrXDjbOV1xrM0-QU+aXSTMYV247gZFZx4ESYoG-XDmC1fQ@mail.gmail.com> (raw)
In-Reply-To: <20151026050450.GF27420@8bytes.org>
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On Oct 26, 2015 2:04 PM, "Joerg Roedel" <joro@8bytes.org> wrote:
>
> On Mon, Oct 26, 2015 at 01:48:02PM +0900, David Woodhouse wrote:
> > 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, [...]
>
> Sure, I think this is what qemu provides already, except for the virtio
> devices (which are also emulated). I think it would be cool to have
> virtio translated by the emulated iommu too (at least optional).
Are we willing to break the existing (experimental?)
untranslated-but-still-behind-IOMMU case? Or can we fix up the DMAR tables
to make it keep working?
I'm not volunteering to write the QEMU part, and I'm not an expert on DMAR,
but I have patches for the pre-1.0 kernel part, and doing the modern
virtio-pci case would be straightforward.
--Andy
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next prev parent reply other threads:[~2015-10-26 6:03 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
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 [this message]
2015-10-26 4:38 ` Joerg Roedel
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