From: David Woodhouse <dwmw2@infradead.org>
To: "Michael S. Tsirkin" <mst@redhat.com>,
Andy Lutomirski <luto@amacapital.net>
Cc: "qemu-devel@nongnu.org Developers" <qemu-devel@nongnu.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
peterx@redhat.com, Cornelia Huck <cornelia.huck@de.ibm.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Kevin Wolf <kwolf@redhat.com>, Amit Shah <amit.shah@redhat.com>,
qemu-block@nongnu.org, Jason Wang <jasowang@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Andy Lutomirski <luto@kernel.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Wei Liu <wei.liu2@citrix.com>,
Linux Virtualization <virtualization@lists.linux-foundation.org>,
kvm list <kvm@vger.kernel.org>
Subject: Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api
Date: Tue, 19 Apr 2016 12:26:44 -0400 [thread overview]
Message-ID: <1461083204.20056.8.camel@infradead.org> (raw)
In-Reply-To: <20160419191914-mutt-send-email-mst@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 594 bytes --]
On Tue, 2016-04-19 at 19:20 +0300, Michael S. Tsirkin wrote:
>
> > I thought that PLATFORM served that purpose. Woudn't the host
> > advertise PLATFORM support and, if the guest doesn't ack it, the host
> > device would skip translation? Or is that problematic for vfio?
>
> Exactly that's problematic for security.
> You can't allow guest driver to decide whether device skips security.
Right. Because fundamentally, this *isn't* a property of the endpoint
device, and doesn't live in virtio itself.
It's a property of the platform IOMMU, and lives there.
--
dwmw2
[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5691 bytes --]
next prev parent reply other threads:[~2016-04-19 17:31 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-18 11:47 [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api Michael S. Tsirkin
2016-04-18 11:58 ` David Woodhouse
2016-04-18 13:12 ` Michael S. Tsirkin
2016-04-18 14:03 ` David Woodhouse
2016-04-18 14:23 ` Michael S. Tsirkin
2016-04-18 15:22 ` David Woodhouse
2016-04-18 15:30 ` Michael S. Tsirkin
2016-04-18 15:51 ` David Woodhouse
2016-04-18 16:27 ` Michael S. Tsirkin
2016-04-18 18:29 ` David Woodhouse
2016-04-18 19:24 ` Andy Lutomirski
2016-04-19 10:27 ` Michael S. Tsirkin
2016-04-19 16:02 ` Andy Lutomirski
2016-04-19 16:09 ` Michael S. Tsirkin
2016-04-19 16:12 ` Andy Lutomirski
2016-04-19 16:20 ` Michael S. Tsirkin
2016-04-19 16:26 ` David Woodhouse [this message]
2016-04-19 17:49 ` Michael S. Tsirkin
2016-04-19 18:01 ` Andy Lutomirski
2016-04-19 20:16 ` Michael S. Tsirkin
2016-04-19 20:27 ` Andy Lutomirski
2016-04-19 20:54 ` Michael S. Tsirkin
2016-04-19 21:07 ` Andy Lutomirski
2016-04-20 13:14 ` Michael S. Tsirkin
2016-04-20 15:43 ` Andy Lutomirski
2016-04-19 9:13 ` Michael S. Tsirkin
2016-04-19 14:44 ` Alex Williamson
2016-04-19 16:00 ` Andy Lutomirski
2016-04-19 16:04 ` Michael S. Tsirkin
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=1461083204.20056.8.camel@infradead.org \
--to=dwmw2@infradead.org \
--cc=alex.williamson@redhat.com \
--cc=amit.shah@redhat.com \
--cc=borntraeger@de.ibm.com \
--cc=cornelia.huck@de.ibm.com \
--cc=jasowang@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=kwolf@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=luto@kernel.org \
--cc=mst@redhat.com \
--cc=pbonzini@redhat.com \
--cc=peterx@redhat.com \
--cc=qemu-block@nongnu.org \
--cc=qemu-devel@nongnu.org \
--cc=stefanha@redhat.com \
--cc=virtualization@lists.linux-foundation.org \
--cc=wei.liu2@citrix.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).