From: "Hans J. Koch" <hjk@hansjkoch.de>
To: Andreas Hartmann <andihartmann@01019freenet.de>
Cc: Dominic Eschweiler <eschweiler@fias.uni-frankfurt.de>,
Alex Williamson <alex.williamson@redhat.com>,
Jan Kiszka <jan.kiszka@siemens.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Hans J. Koch" <hjk@hansjkoch.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] uio_pci_generic does not export memory resources
Date: Fri, 8 Jun 2012 18:44:26 +0200 [thread overview]
Message-ID: <20120608164426.GE9705@local> (raw)
In-Reply-To: <4FD22552.6090609@01019freenet.de>
On Fri, Jun 08, 2012 at 06:16:18PM +0200, Andreas Hartmann wrote:
> Hi Dominic,
>
> Dominic Eschweiler wrote:
> > Am Freitag, den 08.06.2012, 08:16 -0600 schrieb Alex Williamson:
> >> Yes, thanks Jan. This is exactly what VFIO does. VFIO provides
> >> secure config space access, resource access, DMA mapping services, and
> >> full interrupt support to userspace.
VFIO is not a "better UIO". It *requires* an IOMMU. Dominic didn't say on
what CPU he's working, so it's not clear if he can use VFIO at all.
UIO is intended for general use with devices that have mappable registers
and don't fit into any other subsystem. No more, no less.
Thanks,
Hans
next prev parent reply other threads:[~2012-06-08 16:44 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-08 11:56 [PATCH] uio_pci_generic does not export memory resources Dominic Eschweiler
2012-06-08 13:03 ` Michael S. Tsirkin
2012-06-08 13:16 ` Jan Kiszka
2012-06-08 14:16 ` Alex Williamson
2012-06-08 14:47 ` Dominic Eschweiler
2012-06-08 15:06 ` Alex Williamson
2012-06-08 16:16 ` Andreas Hartmann
2012-06-08 16:41 ` Alex Williamson
2012-06-09 9:28 ` Andreas Hartmann
2012-06-09 14:50 ` Alex Williamson
2012-06-09 16:25 ` Andreas Hartmann
2012-06-09 16:55 ` Alex Williamson
2012-06-10 7:21 ` Andreas Hartmann
2012-06-10 19:12 ` Andreas Hartmann
2012-06-10 14:12 ` Michael S. Tsirkin
2012-06-08 16:44 ` Hans J. Koch [this message]
2012-06-08 16:59 ` Jan Kiszka
2012-06-08 17:11 ` Alex Williamson
2012-06-10 14:18 ` Michael S. Tsirkin
2012-06-10 16:09 ` Alex Williamson
2012-06-10 16:44 ` Michael S. Tsirkin
2012-06-10 17:38 ` Alex Williamson
2012-06-10 18:43 ` Michael S. Tsirkin
2012-06-10 19:00 ` Michael S. Tsirkin
2012-06-10 19:11 ` Hans J. Koch
2012-06-10 19:16 ` Michael S. Tsirkin
2012-06-10 20:19 ` Hans J. Koch
2012-06-10 19:01 ` Hans J. Koch
2012-06-08 14:28 ` Dominic Eschweiler
2012-06-08 15:18 ` Hans J. Koch
2012-06-08 15:45 ` Dominic Eschweiler
2012-06-08 15:57 ` Hans J. Koch
2012-06-08 16:23 ` Dominic Eschweiler
2012-06-08 16:37 ` Hans J. Koch
2012-06-08 17:07 ` Dominic Eschweiler
2012-06-08 17:11 ` Hans J. Koch
2012-06-08 16:39 ` Michael S. Tsirkin
2012-06-08 16:07 ` Hans J. Koch
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