From: Vlad Zolotarov <vladz@cloudius-systems.com>
To: Stephen Hemminger <stephen@networkplumber.org>,
Alex Williamson <alex.williamson@redhat.com>
Cc: Avi Kivity <avi@scylladb.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Greg KH <gregkh@linuxfoundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
hjk@hansjkoch.de, Jonathan Corbet <corbet@lwn.net>,
"Bruce.Richardson@intel.com" <bruce.richardson@intel.com>,
avi@cloudius-systems.com, gleb@cloudius-systems.com,
Alexander Duyck <alexander.duyck@gmail.com>
Subject: Re: [PATCH v3 2/3] uio_pci_generic: add MSI/MSI-X support
Date: Wed, 7 Oct 2015 10:57:12 +0300 [thread overview]
Message-ID: <5614D058.3070509@cloudius-systems.com> (raw)
In-Reply-To: <CAOaVG152OrQz-Bbnpr0VeE+vLH7nMGsG6A3sD7eTQHormNGVUg@mail.gmail.com>
On 10/07/15 00:58, Stephen Hemminger wrote:
> Go ahead and submit a seperate taint bit for UIO as a patch.
This patch already does this.
thanks,
vlad
>
>
> On Tue, Oct 6, 2015 at 10:41 PM, Alex Williamson
> <alex.williamson@redhat.com <mailto:alex.williamson@redhat.com>> wrote:
>
> On Tue, 2015-10-06 at 22:32 +0100, Stephen Hemminger wrote:
> > On Tue, 06 Oct 2015 12:51:20 -0600
> > Alex Williamson <alex.williamson@redhat.com
> <mailto:alex.williamson@redhat.com>> wrote:
> >
> > > Of course this is entirely unsafe and this no-iommu driver
> should taint
> > > the kernel, but it at least standardizes on one userspace API
> and you're
> > > already doing completely unsafe things with uio. vfio should be
> > > enlightened at least to the point that it allows only
> privileged users
> > > access to devices under such a (lack of) iommu
> >
> > I agree with the design, but not with the taint argument.
> > (Unless you want to taint any and all use of UIO drivers which can
> > already do this).
>
> Yes, actually, if the bus master bit gets enabled all bets are off. I
> don't see how that leaves a supportable kernel, so we might as well
> taint it. Isn't this exactly why we taint for proprietary drivers, we
> have no idea what it has mucked with in kernel space. This just moves
> the proprietary driver out to userspace without an iommu to
> protect the
> host. Thanks,
>
> Alex
>
>
next prev parent reply other threads:[~2015-10-07 7:57 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-04 20:43 [PATCH v3 0/3] uio: add MSI/MSI-X support to uio_pci_generic driver Vlad Zolotarov
2015-10-04 20:43 ` [PATCH v3 1/3] uio: add ioctl support Vlad Zolotarov
2015-10-05 3:03 ` Greg KH
2015-10-05 7:33 ` Vlad Zolotarov
2015-10-05 8:01 ` Greg KH
2015-10-05 10:36 ` Vlad Zolotarov
2015-10-05 20:02 ` Michael S. Tsirkin
[not found] ` <CAOYyTHZ2=UCYxuJKvd5S6qxp=84DBq5bMadg5wL0rFLZBh2-8Q@mail.gmail.com>
2015-10-05 22:29 ` Michael S. Tsirkin
2015-10-06 8:33 ` Vlad Zolotarov
2015-10-06 14:19 ` Michael S. Tsirkin
2015-10-06 14:30 ` Gleb Natapov
2015-10-06 15:19 ` Michael S. Tsirkin
2015-10-06 15:31 ` Vlad Zolotarov
2015-10-06 15:57 ` Gleb Natapov
2015-10-04 20:43 ` [PATCH v3 2/3] uio_pci_generic: add MSI/MSI-X support Vlad Zolotarov
2015-10-05 3:11 ` Greg KH
2015-10-05 7:41 ` Vlad Zolotarov
2015-10-05 7:56 ` Greg KH
2015-10-05 10:48 ` Vlad Zolotarov
2015-10-05 10:57 ` Greg KH
2015-10-05 11:09 ` Avi Kivity
2015-10-05 13:08 ` Greg KH
2015-10-05 11:41 ` Vlad Zolotarov
2015-10-05 11:47 ` Avi Kivity
2015-10-05 11:53 ` Vlad Zolotarov
2015-10-05 8:28 ` Avi Kivity
2015-10-05 9:49 ` Greg KH
2015-10-05 10:20 ` Avi Kivity
2015-10-06 14:38 ` Michael S. Tsirkin
2015-10-06 14:43 ` Vlad Zolotarov
2015-10-06 14:56 ` Michael S. Tsirkin
2015-10-06 15:23 ` Avi Kivity
2015-10-06 18:51 ` Alex Williamson
2015-10-06 21:32 ` Stephen Hemminger
2015-10-06 21:41 ` Alex Williamson
[not found] ` <CAOaVG152OrQz-Bbnpr0VeE+vLH7nMGsG6A3sD7eTQHormNGVUg@mail.gmail.com>
2015-10-07 7:57 ` Vlad Zolotarov [this message]
[not found] ` <5614C160.6000203@scylladb.com>
2015-10-07 8:00 ` Vlad Zolotarov
2015-10-07 8:01 ` Vlad Zolotarov
2015-10-07 6:52 ` Avi Kivity
2015-10-07 16:31 ` Alex Williamson
2015-10-07 16:39 ` Avi Kivity
2015-10-07 21:05 ` Michael S. Tsirkin
2015-10-08 4:19 ` Gleb Natapov
2015-10-08 7:41 ` Michael S. Tsirkin
2015-10-08 7:59 ` Gleb Natapov
2015-10-08 9:38 ` Michael S. Tsirkin
2015-10-08 9:45 ` Gleb Natapov
2015-10-08 12:15 ` Michael S. Tsirkin
2015-10-08 5:33 ` Avi Kivity
2015-10-08 7:32 ` Michael S. Tsirkin
2015-10-08 8:46 ` Avi Kivity
2015-10-08 9:16 ` Michael S. Tsirkin
2015-10-08 9:44 ` Avi Kivity
2015-10-08 12:06 ` Michael S. Tsirkin
2015-10-08 12:27 ` Gleb Natapov
2015-10-08 13:20 ` Michael S. Tsirkin
2015-10-08 13:28 ` Gleb Natapov
2015-10-08 16:43 ` Michael S. Tsirkin
2015-10-08 17:01 ` Gleb Natapov
2015-10-08 17:39 ` Michael S. Tsirkin
2015-10-08 17:53 ` Gleb Natapov
2015-10-08 18:38 ` Greg KH
2015-10-08 8:32 ` Michael S. Tsirkin
2015-10-08 8:52 ` Gleb Natapov
2015-10-08 9:19 ` Avi Kivity
2015-10-08 10:26 ` Michael S. Tsirkin
2015-10-08 13:20 ` Avi Kivity
2015-10-08 14:17 ` Michael S. Tsirkin
2015-10-08 15:31 ` Alex Williamson
2015-10-07 20:05 ` Michael S. Tsirkin
2015-10-07 7:55 ` Vlad Zolotarov
2015-10-08 8:48 ` Michael S. Tsirkin
2015-10-06 15:28 ` Vlad Zolotarov
2015-10-06 14:46 ` Michael S. Tsirkin
2015-10-06 15:27 ` Avi Kivity
2015-10-05 8:41 ` Stephen Hemminger
2015-10-05 9:08 ` Vlad Zolotarov
2015-10-05 10:06 ` Vlad Zolotarov
2015-10-05 20:09 ` Michael S. Tsirkin
2015-10-05 9:11 ` Vlad Zolotarov
2015-10-05 19:16 ` Michael S. Tsirkin
2015-10-04 20:43 ` [PATCH v3 3/3] Documentation: update uio-howto Vlad Zolotarov
2015-10-04 20:45 ` [PATCH v3 0/3] uio: add MSI/MSI-X support to uio_pci_generic driver Vlad Zolotarov
2015-10-05 19:50 ` Michael S. Tsirkin
2015-10-06 8:37 ` Vlad Zolotarov
2015-10-06 14:30 ` Michael S. Tsirkin
2015-10-06 14:40 ` Vlad Zolotarov
2015-10-06 15:13 ` Michael S. Tsirkin
2015-10-06 16:35 ` Vlad Zolotarov
2015-10-06 15:11 ` Avi Kivity
2015-10-06 15:15 ` Michael S. Tsirkin
2015-10-06 16:00 ` Gleb Natapov
2015-10-06 16:09 ` Avi Kivity
2015-10-07 10:25 ` Michael S. Tsirkin
2015-10-07 10:28 ` Avi Kivity
-- strict thread matches above, loose matches on Subject: below --
2015-10-04 20:39 Vlad Zolotarov
2015-10-04 20:39 ` [PATCH v3 2/3] uio_pci_generic: add MSI/MSI-X support Vlad Zolotarov
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