From: Peter Xu <peterx@redhat.com>
To: Yi Sun <yi.y.sun@linux.intel.com>
Cc: qemu-devel@nongnu.org, pbonzini@redhat.com, rth@twiddle.net,
ehabkost@redhat.com, mst@redhat.com, marcel.apfelbaum@gmail.com,
jasowang@redhat.com, kevin.tian@intel.com, yi.l.liu@intel.com,
yi.y.sun@intel.com
Subject: Re: [Qemu-devel] [PATCH v1 0/3] intel_iommu: support scalable mode
Date: Tue, 5 Mar 2019 13:36:12 +0800 [thread overview]
Message-ID: <20190305053611.GJ1657@xz-x1> (raw)
In-Reply-To: <20190305051553.GK26129@yi.y.sun>
On Tue, Mar 05, 2019 at 01:15:53PM +0800, Yi Sun wrote:
[...]
> > > w/o passthr
> > > -device intel-iommu \
> > > -netdev tap,id=net1,vhost=off|on \
> > > -device virtio-net-pci,netdev=net1 \
> >
> > Virtio devices require explicit enabling of DMAR:
> >
> > https://wiki.qemu.org/Features/VT-d#With_Virtio_Devices
> >
> > Otherwise it could probably still be bypassing the translation unit.
> >
> > If you retest any, please feel free to skip some of the tests like
> > kernel build. Quick netperf should work, which can save you time.
> >
> Thanks! Just made a quick test. It works well. Please check below
> command.
>
> -device intel-iommu,intremap=on,device-iotlb=on \
> -netdev tap,id=net1,vhost=off \
> -device ioh3420,id=pcie.1,chassis=1 \
> -device
> virtio-net-pci,bus=pcie.1,netdev=net1,disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on
> \
Please also consider to try vhost=on with/without iommu=pt.
Regards,
--
Peter Xu
next prev parent reply other threads:[~2019-03-05 5:36 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-05 2:34 [Qemu-devel] [PATCH v1 0/3] intel_iommu: support scalable mode Yi Sun
2019-03-05 2:34 ` [Qemu-devel] [PATCH v1 1/3] intel_iommu: scalable mode emulation Yi Sun
2019-03-05 3:06 ` Peter Xu
2019-03-05 2:34 ` [Qemu-devel] [PATCH v1 2/3] intel_iommu: add 256 bits qi_desc support Yi Sun
2019-03-05 2:34 ` [Qemu-devel] [PATCH v1 3/3] intel_iommu: add scalable-mode option to make scalable mode work Yi Sun
2019-03-05 3:07 ` Peter Xu
2019-03-05 3:09 ` [Qemu-devel] [PATCH v1 0/3] intel_iommu: support scalable mode Peter Xu
2019-03-05 3:23 ` Michael S. Tsirkin
2019-03-05 3:24 ` Yi Sun
2019-03-05 4:48 ` Peter Xu
2019-03-05 5:15 ` Yi Sun
2019-03-05 5:36 ` Peter Xu [this message]
2019-03-05 6:27 ` Yi Sun
2019-03-05 6:39 ` Peter Xu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190305053611.GJ1657@xz-x1 \
--to=peterx@redhat.com \
--cc=ehabkost@redhat.com \
--cc=jasowang@redhat.com \
--cc=kevin.tian@intel.com \
--cc=marcel.apfelbaum@gmail.com \
--cc=mst@redhat.com \
--cc=pbonzini@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=rth@twiddle.net \
--cc=yi.l.liu@intel.com \
--cc=yi.y.sun@intel.com \
--cc=yi.y.sun@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).