pci passthrough and Xenserver

pci passthrough and Xenserver

[Ritu kaur]

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Hi,

We are running Citrix Xenserver 5.5(dom0) and PV guests(domU). Since VT-d
support is not required for PV guests has anyone tried pci passthrough with
Citrix Xenserver? If yes what config file changes are required in domU and
dom0? I looked at Citrix forums and xen.org/xen-users archives, not getting
useful information from it. Inputs much appreciated.

Thanks

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Re: pci passthrough and Xenserver

[Dulloor]

http://wiki.xensource.com/xenwiki/VTdHowTo

For passthrough (PVs as well), you have to hide the pci device from
Dom0 (section Binding Devices to pciback) and then use
"pci=['<device-id>']" option in guest config

-dulloor

On Mon, Mar 8, 2010 at 2:59 PM, Ritu kaur <ritu.kaur.us@gmail.com> wrote:
> Hi,
>
> We are running Citrix Xenserver 5.5(dom0) and PV guests(domU). Since VT-d
> support is not required for PV guests has anyone tried pci passthrough with
> Citrix Xenserver? If yes what config file changes are required in domU and
> dom0? I looked at Citrix forums and xen.org/xen-users archives, not getting
> useful information from it. Inputs much appreciated.
>
> Thanks
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>
>

Re: [Xen-users] pci passthrough and Xenserver

[Ritu kaur]

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Hi,

I did go through  vmops.ml and I really didn't get much information on what
config file it is reading or what changes are needed. I looked at
http://wiki.xensource.com/xenwiki/Assign_hardware_to_DomU_with_PCIBack_as_modulefrom
the link given by Dullor, not sure whether those changes suffice XCP
for pci passthrough hence thought of checking. Any inputs?

Thanks

On Mon, Mar 8, 2010 at 2:37 PM, James Troup <james@linuxterminal.com> wrote:

> No PCI passthrough for XenServer AFAIK.
> You need XCP for that and then it is still very experimental with NO
> documentation except what is in the code.
> Line 483+
> http://xenbits.xen.org/xapi/xen-api.hg?file/a8decf9d3bee/ocaml/xapi/vmops.ml
>
>
> ----- Original Message -----
> From: "Ritu kaur" <ritu.kaur.us@gmail.com>
> To: xen-devel@lists.xensource.com, xen-users@lists.xensource.com
> Sent: Tuesday, 9 March, 2010 6:29:49 AM
> Subject: [Xen-users] pci passthrough and Xenserver
>
> Hi,
>
> We are running Citrix Xenserver 5.5(dom0) and PV guests(domU). Since VT-d
> support is not required for PV guests has anyone tried pci passthrough with
> Citrix Xenserver? If yes what config file changes are required in domU and
> dom0? I looked at Citrix forums and xen.org/xen-users archives, not
> getting useful information from it. Inputs much appreciated.
>
> Thanks
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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http://lists.xensource.com/xen-devel

Re: [Xen-users] pci passthrough and Xenserver

[Ritu kaur]

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Hi,

I had additional questions(I re-read the Assign_hardware...), and I don't
quite follow it completely. The config given is for dom0, it doesn't have
any information as to what domU will get access to this pci device? Do I
need to change config in domU as well, document doesn't say anything about
it. Furthermore, in the document I see references to "xm
pci-list-assignable-devices" cli's, however, XCP comes with xe tool-stack,
does it come with similar pci commands? I am yet to install XCP, but wanted
to check.

Thanks


On Tue, Mar 9, 2010 at 5:07 PM, Ritu kaur <ritu.kaur.us@gmail.com> wrote:

> Hi,
>
> I did go through  vmops.ml and I really didn't get much information on
> what config file it is reading or what changes are needed. I looked at
> http://wiki.xensource.com/xenwiki/Assign_hardware_to_DomU_with_PCIBack_as_modulefrom the link given by Dullor, not sure whether those changes suffice XCP
> for pci passthrough hence thought of checking. Any inputs?
>
> Thanks
>
> On Mon, Mar 8, 2010 at 2:37 PM, James Troup <james@linuxterminal.com>wrote:
>
>> No PCI passthrough for XenServer AFAIK.
>> You need XCP for that and then it is still very experimental with NO
>> documentation except what is in the code.
>> Line 483+
>> http://xenbits.xen.org/xapi/xen-api.hg?file/a8decf9d3bee/ocaml/xapi/vmops.ml
>>
>>
>> ----- Original Message -----
>> From: "Ritu kaur" <ritu.kaur.us@gmail.com>
>> To: xen-devel@lists.xensource.com, xen-users@lists.xensource.com
>> Sent: Tuesday, 9 March, 2010 6:29:49 AM
>> Subject: [Xen-users] pci passthrough and Xenserver
>>
>> Hi,
>>
>> We are running Citrix Xenserver 5.5(dom0) and PV guests(domU). Since VT-d
>> support is not required for PV guests has anyone tried pci passthrough with
>> Citrix Xenserver? If yes what config file changes are required in domU and
>> dom0? I looked at Citrix forums and xen.org/xen-users archives, not
>> getting useful information from it. Inputs much appreciated.
>>
>> Thanks
>>
>>
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@lists.xensource.com
>> http://lists.xensource.com/xen-users
>>
>
>

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Re: Re: [Xen-users] pci passthrough and Xenserver

[Ian Campbell]

Please don't cross-post.

On Wed, 2010-03-10 at 01:29 +0000, Ritu kaur wrote:
> Hi, 
> 
> I had additional questions(I re-read the Assign_hardware...), and I
> don't quite follow it completely. The config given is for dom0, it
> doesn't have any information as to what domU will get access to this
> pci device? Do I need to change config in domU as well, document
> doesn't say anything about it. Furthermore, in the document I see
> references to "xm pci-list-assignable-devices" cli's, however, XCP
> comes with xe tool-stack, does it come with similar pci commands? I am
> yet to install XCP, but wanted to check.

With XenAPI you can set the VM.other-config:pci key to a comma separated
list of "<bus>/<bdf>" where bus should always be 0 and <bdf> is the
bus-device-function as seen in domain 0. For example to pass device
0000:07:10.0 through to a guest try:

xe vm-param-set uuid=<uuid> other-config:pci=0000:07:10.0

You may need to manually load the pciback module first.

Ian.

> 
> Thanks
> 
> 
> On Tue, Mar 9, 2010 at 5:07 PM, Ritu kaur <ritu.kaur.us@gmail.com>
> wrote:
>         Hi,
>         
>         I did go through  vmops.ml and I really didn't get much
>         information on what config file it is reading or what changes
>         are needed. I looked at
>         http://wiki.xensource.com/xenwiki/Assign_hardware_to_DomU_with_PCIBack_as_module from the link given by Dullor, not sure whether those changes suffice XCP for pci passthrough hence thought of checking. Any inputs?
>         
>         Thanks
>         
>         On Mon, Mar 8, 2010 at 2:37 PM, James Troup
>         <james@linuxterminal.com> wrote:
>         
>         
>                 No PCI passthrough for XenServer AFAIK.
>                 You need XCP for that and then it is still very
>                 experimental with NO documentation except what is in
>                 the code.
>                 Line 483+
>                 http://xenbits.xen.org/xapi/xen-api.hg?file/a8decf9d3bee/ocaml/xapi/vmops.ml
>                 
>                 
>                 
>                 ----- Original Message -----
>                 From: "Ritu kaur" <ritu.kaur.us@gmail.com>
>                 To: xen-devel@lists.xensource.com,
>                 xen-users@lists.xensource.com
>                 Sent: Tuesday, 9 March, 2010 6:29:49 AM
>                 Subject: [Xen-users] pci passthrough and Xenserver
>                 
>                 Hi,
>                 
>                 We are running Citrix Xenserver 5.5(dom0) and PV
>                 guests(domU). Since VT-d support is not required for
>                 PV guests has anyone tried pci passthrough with Citrix
>                 Xenserver? If yes what config file changes are
>                 required in domU and dom0? I looked at Citrix forums
>                 and xen.org/xen-users archives, not getting useful
>                 information from it. Inputs much appreciated.
>                 
>                 Thanks
>                 
>                 
>                 
>                 _______________________________________________
>                 Xen-users mailing list
>                 Xen-users@lists.xensource.com
>                 http://lists.xensource.com/xen-users
>         
> 

Re: [Xen-devel] Re: pci passthrough and Xenserver

[Ritu kaur]

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Hi Ian,

Thank for the inputs, will try this out.

Thanks


On Wed, Mar 10, 2010 at 8:05 AM, Ian Campbell <Ian.Campbell@citrix.com>wrote:

> Please don't cross-post.
>
> On Wed, 2010-03-10 at 01:29 +0000, Ritu kaur wrote:
> > Hi,
> >
> > I had additional questions(I re-read the Assign_hardware...), and I
> > don't quite follow it completely. The config given is for dom0, it
> > doesn't have any information as to what domU will get access to this
> > pci device? Do I need to change config in domU as well, document
> > doesn't say anything about it. Furthermore, in the document I see
> > references to "xm pci-list-assignable-devices" cli's, however, XCP
> > comes with xe tool-stack, does it come with similar pci commands? I am
> > yet to install XCP, but wanted to check.
>
> With XenAPI you can set the VM.other-config:pci key to a comma separated
> list of "<bus>/<bdf>" where bus should always be 0 and <bdf> is the
> bus-device-function as seen in domain 0. For example to pass device
> 0000:07:10.0 through to a guest try:
>
> xe vm-param-set uuid=<uuid> other-config:pci=0000:07:10.0
>
> You may need to manually load the pciback module first.
>
> Ian.
>
> >
> > Thanks
> >
> >
> > On Tue, Mar 9, 2010 at 5:07 PM, Ritu kaur <ritu.kaur.us@gmail.com>
> > wrote:
> >         Hi,
> >
> >         I did go through  vmops.ml and I really didn't get much
> >         information on what config file it is reading or what changes
> >         are needed. I looked at
> >
> http://wiki.xensource.com/xenwiki/Assign_hardware_to_DomU_with_PCIBack_as_modulefrom the link given by Dullor, not sure whether those changes suffice XCP
> for pci passthrough hence thought of checking. Any inputs?
> >
> >         Thanks
> >
> >         On Mon, Mar 8, 2010 at 2:37 PM, James Troup
> >         <james@linuxterminal.com> wrote:
> >
> >
> >                 No PCI passthrough for XenServer AFAIK.
> >                 You need XCP for that and then it is still very
> >                 experimental with NO documentation except what is in
> >                 the code.
> >                 Line 483+
> >
> http://xenbits.xen.org/xapi/xen-api.hg?file/a8decf9d3bee/ocaml/xapi/vmops.ml
> >
> >
> >
> >                 ----- Original Message -----
> >                 From: "Ritu kaur" <ritu.kaur.us@gmail.com>
> >                 To: xen-devel@lists.xensource.com,
> >                 xen-users@lists.xensource.com
> >                 Sent: Tuesday, 9 March, 2010 6:29:49 AM
> >                 Subject: [Xen-users] pci passthrough and Xenserver
> >
> >                 Hi,
> >
> >                 We are running Citrix Xenserver 5.5(dom0) and PV
> >                 guests(domU). Since VT-d support is not required for
> >                 PV guests has anyone tried pci passthrough with Citrix
> >                 Xenserver? If yes what config file changes are
> >                 required in domU and dom0? I looked at Citrix forums
> >                 and xen.org/xen-users archives, not getting useful
> >                 information from it. Inputs much appreciated.
> >
> >                 Thanks
> >
> >
> >
> >                 _______________________________________________
> >                 Xen-users mailing list
> >                 Xen-users@lists.xensource.com
> >                 http://lists.xensource.com/xen-users
> >
> >
>
>
>

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