From: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
To: Chris Wright <chrisw@sous-sol.org>
Cc: kvm@vger.kernel.org, Joerg Roedel <joro@8bytes.org>,
qemu-devel@nongnu.org, Avi Kivity <avi@redhat.com>,
Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support
Date: Thu, 15 Jul 2010 20:27:56 +0300 [thread overview]
Message-ID: <20100715172756.GA16942@localhost> (raw)
In-Reply-To: <20100715171710.GZ14017@sequoia.sous-sol.org>
On Thu, Jul 15, 2010 at 10:17:10AM -0700, Chris Wright wrote:
> * Avi Kivity (avi@redhat.com) wrote:
> >
> > For emulated device, it seems like we can ignore ATS completely, no?
>
> Not if you want to emulate an ATS capable device ;)
>
> Eariler upthread I said:
>
> IOW, if qemu ever had a device with ATS support...
>
> So, that should've been a much bigger _IF_
>
> thanks,
> -chris
I think we can augment some devices with ATS capability if there are
performance gains in doing so. This doesn't seem to be a detail the
actual guest OS would be interested in, so we can do it even for devices
that existed long before the AMD IOMMU came into existence. But I'm not
really sure about this, it's just a thought.
Linux seems to be issuing IOTLB invalidation commands anyway.
Eduard
next prev parent reply other threads:[~2010-07-15 17:29 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-14 5:45 [Qemu-devel] [RFC PATCH 0/7] AMD IOMMU emulation patchset Eduard - Gabriel Munteanu
2010-07-14 5:45 ` [Qemu-devel] [RFC PATCH 1/7] Generic IOMMU layer Eduard - Gabriel Munteanu
2010-07-14 6:07 ` malc
2010-07-14 22:47 ` Eduard - Gabriel Munteanu
2010-07-14 5:45 ` [Qemu-devel] [RFC PATCH 2/7] AMD IOMMU emulation Eduard - Gabriel Munteanu
2010-07-14 20:16 ` Paul Brook
2010-07-14 5:45 ` [Qemu-devel] [RFC PATCH 3/7] pci: call IOMMU hooks Eduard - Gabriel Munteanu
2010-07-14 7:37 ` Isaku Yamahata
2010-07-14 22:50 ` Eduard - Gabriel Munteanu
2010-07-14 5:45 ` [Qemu-devel] [RFC PATCH 4/7] ide: IOMMU support Eduard - Gabriel Munteanu
2010-07-14 13:53 ` [Qemu-devel] " Paul Brook
2010-07-14 18:33 ` Joerg Roedel
2010-07-14 20:13 ` Paul Brook
2010-07-14 21:29 ` Anthony Liguori
2010-07-14 22:24 ` Chris Wright
2010-07-15 10:28 ` Paul Brook
2010-07-15 16:52 ` Chris Wright
2010-07-15 17:02 ` Avi Kivity
2010-07-15 17:17 ` Chris Wright
2010-07-15 17:22 ` Avi Kivity
2010-07-15 17:25 ` Chris Wright
2010-07-15 17:27 ` Eduard - Gabriel Munteanu [this message]
2010-07-15 17:22 ` Joerg Roedel
2010-07-15 17:14 ` Chris Wright
2010-07-15 9:10 ` Joerg Roedel
2010-07-15 12:45 ` Anthony Liguori
2010-07-15 14:45 ` Joerg Roedel
2010-07-15 16:45 ` Eduard - Gabriel Munteanu
2010-07-15 17:42 ` Anthony Liguori
2010-07-15 10:33 ` Paul Brook
2010-07-15 12:42 ` Anthony Liguori
2010-07-15 14:02 ` Paul Brook
2010-07-14 23:39 ` Eduard - Gabriel Munteanu
2010-07-15 9:22 ` Joerg Roedel
2010-07-15 10:49 ` Paul Brook
2010-07-15 14:59 ` Joerg Roedel
2010-07-14 23:11 ` Eduard - Gabriel Munteanu
2010-07-15 10:58 ` Paul Brook
2010-07-14 5:45 ` [Qemu-devel] [RFC PATCH 5/7] rtl8139: " Eduard - Gabriel Munteanu
2010-07-14 5:45 ` [Qemu-devel] [RFC PATCH 6/7] eepro100: " Eduard - Gabriel Munteanu
2010-07-14 5:45 ` [Qemu-devel] [RFC PATCH 7/7] ac97: " Eduard - Gabriel Munteanu
2010-07-14 6:09 ` malc
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