Hi Gizmo,
thank you for your efforts in helping me.
I've been trying various combinations, one of them was your last
suggestion - with no success.
Since that costs me too much time I think I will give up and wait
until xcp-xapi in debian will be mature.
In the meantime Citrix Xenserver is the system of choice for my
customers.
Best regards,
Paul
Am 10.12.2012 00:11, schrieb Gizmo Chicken:
Paul,
I'm not sure about the PCI passthrough tutorial, but I hope that
what I provide below will be of some help.
First, if I recall correctly, you'll need to add "iommu=1" into
the Xen commandline. If using grub, you can edit your
/etc/default/grub file as root and to include at least the
following or similar:
GRUB_CMDLINE_XEN="iommu=1"
As for xe commands, the PCI passthrough command in xe takes the
following form:
xe vm-param-set
other-config:pci=0/<pci-id#> uuid=<uuid>
Or if you want to passthrough multiple PCI devices (or a
multifunction device), the PCI passthrough command in xe takes the
following form:
xe vm-param-set
other-config:pci=0/<pci-id#>,1/<pci-id#>,2/<pci-id#>,3/<pci-id#>,4/<pci-id#>
uuid=<uuid>
You'll need to replace <pci-id#> and <uuid> with
appropriate values.
Here's an example showing the xe command for the passthrough of 2
PCI devices:
xe vm-param-set
other-config:pci=0/0000:00:1d.0,1/0000:00:1d.1
uuid=d6eb559e-af70-6f8e-d10f-62fc9f73db89
Of course, the your values for <pci-id#> and <uuid>
will differ from the above example.
DISCLAIMER: Although I hope to set up PCI passthrough on an XCP
system in the near future, as of now, I have only configured PCI
passthrough on a system that runs vanilla Xen. So the above is
based mostly on what I have gleaned from forum posts and replies,
not on my own personal experience.
I invite others who know more about PCI passthrough to
correct/clarify any of the above.
Best regards,
GizmoChicken
On Sat, Dec 8, 2012 at 9:20 AM, Paul
Pridt <p.pridt@xxxxxxxxx>
wrote:
Hi,
first let me thank for your replies.
Further to your notes I did some investigation and tests,
but was not successful.
I am fairly familiar on pci-passthrough in xm or xl
toolstack.
I assigned the adapter in question to pciback, entered the
other-config parameters and started the vm, but the vm did
not see the drive.
Looking at the tutorial on XCP_Ubuntu_PCIPassthrough I found
that the author references the xl command which is not
available when you install the cp-xapi in Ubuntu and set
the toolstack to xapi. Both xe and xl commands are
available in XCP-Server, but there the udev SRs work
anyway.
I also tried to create the udev SR:
xe sr-create content-type=disk name-label=”Removable
storage” type=udev device-config:location=/dev/xapi/block
The answer was:
The SR could not be connected because the driver was not
recognised.
driver: udev
It seems that there is some task needed that creates
/dev/xapi/block ..
I think if I were successful on the latter task I could
create the vdi manually and attach it to the vm.
I will furter investigate ...
Regards
Paul
Am 07.12.2012 16:45, schrieb Gizmo Chicken:
Grant,
I had nearly finished drafting my reply to Paul when I
noticed your reply.
As mentioned in my reply to Paul, I suspect that what
Paul wants to do (passthrough a USB device) could be
accomplished via PCI passthrough (of an entire USB
controller) to an HVM guest. Does that sound right?
As I also mentioned in my reply to Paul, another
poster (Donald van der Wurf) attempted to adapt a
tutorial found at http://wiki.xen.org/wiki/XCP_Ubuntu_PCIPassthrough
to his goal of configuring PCI passthrough to an HVM
guest in XCP. However, the original poster wasn't
successful, and so sought help from the group.
Your technical knowledge is clearly way beyond mine.
If you feel that it would be possible to configure PCI
passthrough to an HVM guest in XCP, would you consider
creating a brief tutorial, or possibly extending the
above mentioned tutorial, to describe the procedure?
Any help from you (or others) would be greatly
appreciated.
Best regards,
GizmoChicken
---------- Forwarded message
----------
From: Gizmo Chicken
<gizmochicken@xxxxxxxxx>
Date: Fri, Dec 7, 2012 at 10:00 AM
Subject: Re: [Xen-API] Attach CD or Removable
Devices
To: Paul Pridt < p.pridt@xxxxxxxxx>
Cc: xen-api@xxxxxxxxxxxxx
Paul,
I suspect that what you want to do could be
accomplished via PCI passthrough to an HVM guest,
which is the subject of a thread having the subject
"[Xen-API] XCP PCI Passthrough on HVM how to?" that
was started a few weeks ago. So you might want to
follow (and perhaps join in) that thread.
Without repeating the entirety of the above
mentioned thread, I'll note that the original poster
referenced a tutorial found at http://wiki.xen.org/wiki/XCP_Ubuntu_PCIPassthrough
addressing PCI passthrough to a PV guest in XCP.
However, the original poster wasn't able to adapt
that tutorial to his goal of configuring PCI
passthrough to an HVM guest in XCP, and so sought
help from the group.
Unlike the situation with the XAPI toolstack, the
procedure for configuring PCI passthrough to an HVM
guest is relatively straightforward with Xen when
using the default toolstack. For a discussion of
both VGA and PCI passthrough in Xen when using the
default toolstack, see http://forums.linuxmint.com/viewtopic.php?f=42&t=112013.
So if you don't mind leaving behind the comforts of
XenCenter for something like Virtual Machine Manager
(virt-manager), maybe Xen and its default toolstack
is a better option for you.
I wish that I could be of more help.
Best regards,
GizmoChicken
P.S. I'm currently using Xen (and Virtual Machine
Manager), but I would switch to XCP (and XenCenter)
if I could get PCI passthough working in XCP. In
such a case, I would passthrough nearly all of my
USB controllers, along with a second PCI video card,
to an HVM guest running Ubuntu desktop. That way I
could have, on a single machine, both a stable XCP
server (which I could leave up 24/7 to host my
virtual servers) and also local access to virtual
machine having fully functional desktop (which I
could shut down when not in use). I imagine that
many would apprciate such functionality in XCP, so
let's hope that the developers consider adding such
a feature to future releases of XCP if not already
possible via xe command line.
On Fri, Dec 7, 2012 at 3:18 AM, Paul
Pridt <p.pridt@xxxxxxxxx>
wrote:
Hi,
I am looking for a way to attach a
physical CD drive or a USB-attached
hard drive to a VM.
I know that Citrix Xenserver does that
through special udev-SRs. There you
even can attach an internal hard drive
with the help of an udev rule that
creates the vdi.
Has anybody a running solution?
My system is Ubuntu 12.04 with
xcp-xapi.
--
Regards,
Paul
What is it exactly you're trying
to accomplish? I'd start by checking
/etc/udev/rules.d/58-xapi.rules for
events and check the scripts that it
runs.
58-xapi.rules
# Skip devices which fail the local
sharing check (to filter out
root/mounted devices)
ACTION=""
PROGRAM!="/opt/xensource/libexec/check-device-sharing
%k", GOTO="end_xapi"
ACTION=""
SYMLINK+="xapi/block/%k"
ACTION="" RUN+="/bin/sh -c
'/opt/xensource/libexec/local-device-change
%k 2>&1 >/dev/null&'"
ACTION="" RUN+="/bin/sh -c
'/opt/xensource/libexec/local-device-change
%k 2>&1 >/dev/null&'"
Part of
/opt/xensource/libexec/local-device-change
for SR in `xe sr-list type=udev
sm-config:type=block uuid=${LOCAL_SR}
params=uuid --minimal`
do
xe vdi-introduce
uuid=`uuidgen` sr-uuid=${SR} type=user
location=/dev/xapi/block/${DEVICE}
done
Read the whole scripts of course but
this might get you started.
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