Ubuntu 11.04 (amd64 and i386) under Xen as PV on HVM guests don't load the PV drivers.

Ubuntu 11.04 (amd64 and i386) under Xen as PV on HVM guests don't load the PV drivers.

[Konrad Rzeszutek Wilk]

So  I tried to load the Ubuntu 11.04 - both x86 and amd64 with this
little guest config:

kernel = "/usr/lib/xen/boot/hvmloader"
builder='hvm'
memory=1024
maxvcpus = 2
serial='pty'
vcpus = 2
disk = [ 'file:/home/konrad/Downloads/ubuntu-11.10-desktop-amd64.iso,hdc:cdrom,r','phy:/dev/vg_guest/ubuntu1110,hda,w']
boot="dn"
vif = [ 'type=ioemu,model=e1000,mac=00:0f:4b:00:00:66, bridge=switch' ]
vnc=1
vnclisten="0.0.0.0"
usb=1
xen_platform_pci=1
usbdevice='tablet'

And found out that the i386 does not have PAE built in, so the whole Xen
subsystem is turned off (oops) - that actually looks like a bug b/c I think
the PV drivers in HVM mode ought to work in non-PAE mode.. It means that
the guest is running completly as HVM.

But then I thought - surely the x86_64 should work. So botted it up, saw
xen-platform-pci do the unplugging off the QEMU drivers, and .. then no
network nor any disk - it looks like both xen-netfront and xen-blkfront
don't get loaded? Looking in /lib/modules/*/ shows that they exist - so they
are compiled in.

Is that a known bug or should I open a BZ for that? Thanks.

Re: Ubuntu 11.04 (amd64 and i386) under Xen as PV on HVM guests don't load the PV drivers.

[Konrad Rzeszutek Wilk]

On Mon, Mar 26, 2012 at 04:59:05PM -0400, Konrad Rzeszutek Wilk wrote:
> So  I tried to load the Ubuntu 11.04 - both x86 and amd64 with this

Grrrr.. Ignore this email please. I hadn't realized that 12.xx is the new
one - and playing with that right now.

> little guest config:
> 
> kernel = "/usr/lib/xen/boot/hvmloader"
> builder='hvm'
> memory=1024
> maxvcpus = 2
> serial='pty'
> vcpus = 2
> disk = [ 'file:/home/konrad/Downloads/ubuntu-11.10-desktop-amd64.iso,hdc:cdrom,r','phy:/dev/vg_guest/ubuntu1110,hda,w']
> boot="dn"
> vif = [ 'type=ioemu,model=e1000,mac=00:0f:4b:00:00:66, bridge=switch' ]
> vnc=1
> vnclisten="0.0.0.0"
> usb=1
> xen_platform_pci=1
> usbdevice='tablet'
> 
> And found out that the i386 does not have PAE built in, so the whole Xen
> subsystem is turned off (oops) - that actually looks like a bug b/c I think
> the PV drivers in HVM mode ought to work in non-PAE mode.. It means that
> the guest is running completly as HVM.
> 
> But then I thought - surely the x86_64 should work. So botted it up, saw
> xen-platform-pci do the unplugging off the QEMU drivers, and .. then no
> network nor any disk - it looks like both xen-netfront and xen-blkfront
> don't get loaded? Looking in /lib/modules/*/ shows that they exist - so they
> are compiled in.
> 
> Is that a known bug or should I open a BZ for that? Thanks.
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel

Re: Ubuntu 11.04 (amd64 and i386) under Xen as PV on HVM guests don't load the PV drivers.

[Stefan Bader]

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On 27.03.2012 16:41, Konrad Rzeszutek Wilk wrote:
> On Mon, Mar 26, 2012 at 04:59:05PM -0400, Konrad Rzeszutek Wilk wrote:
>> So  I tried to load the Ubuntu 11.04 - both x86 and amd64 with this
> 
> Grrrr.. Ignore this email please. I hadn't realized that 12.xx is the new
> one - and playing with that right now.
> 
Yeah, unfortunately we sorted out the "better have blkfront and netfront
built-in" too late. After the release went out and the cd/dvd images are
not re-done for non-LTS. :(
So installation has to be done with preventing the unplugging. Also at that
point there still was one of the irq emulation bugs in, so NIC model should be
e1000...

-Stefan

>> little guest config:
>>
>> kernel = "/usr/lib/xen/boot/hvmloader"
>> builder='hvm'
>> memory=1024
>> maxvcpus = 2
>> serial='pty'
>> vcpus = 2
>> disk = [ 'file:/home/konrad/Downloads/ubuntu-11.10-desktop-amd64.iso,hdc:cdrom,r','phy:/dev/vg_guest/ubuntu1110,hda,w']
>> boot="dn"
>> vif = [ 'type=ioemu,model=e1000,mac=00:0f:4b:00:00:66, bridge=switch' ]
>> vnc=1
>> vnclisten="0.0.0.0"
>> usb=1
>> xen_platform_pci=1
>> usbdevice='tablet'
>>
>> And found out that the i386 does not have PAE built in, so the whole Xen
>> subsystem is turned off (oops) - that actually looks like a bug b/c I think
>> the PV drivers in HVM mode ought to work in non-PAE mode.. It means that
>> the guest is running completly as HVM.
>>
>> But then I thought - surely the x86_64 should work. So botted it up, saw
>> xen-platform-pci do the unplugging off the QEMU drivers, and .. then no
>> network nor any disk - it looks like both xen-netfront and xen-blkfront
>> don't get loaded? Looking in /lib/modules/*/ shows that they exist - so they
>> are compiled in.
>>
>> Is that a known bug or should I open a BZ for that? Thanks.
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xen.org
>> http://lists.xen.org/xen-devel



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_______________________________________________
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http://lists.xen.org/xen-devel

Re: Ubuntu 11.04 (amd64 and i386) under Xen as PV on HVM guests don't load the PV drivers.

[Stefan Bader]

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On 27.03.2012 17:11, Stefan Bader wrote:
> On 27.03.2012 16:41, Konrad Rzeszutek Wilk wrote:
>> On Mon, Mar 26, 2012 at 04:59:05PM -0400, Konrad Rzeszutek Wilk wrote:
>>> So  I tried to load the Ubuntu 11.04 - both x86 and amd64 with this
>>
>> Grrrr.. Ignore this email please. I hadn't realized that 12.xx is the new
>> one - and playing with that right now.
>>
> Yeah, unfortunately we sorted out the "better have blkfront and netfront
> built-in" too late. After the release went out and the cd/dvd images are
> not re-done for non-LTS. :(
> So installation has to be done with preventing the unplugging. Also at that
> point there still was one of the irq emulation bugs in, so NIC model should be
> e1000...
Errm, that actually was 11.10. But the unplugging was the same in 11.04 too...

> 
> -Stefan
> 

>>> little guest config:
>>>
>>> kernel = "/usr/lib/xen/boot/hvmloader"
>>> builder='hvm'
>>> memory=1024
>>> maxvcpus = 2
>>> serial='pty'
>>> vcpus = 2
>>> disk = [ 'file:/home/konrad/Downloads/ubuntu-11.10-desktop-amd64.iso,hdc:cdrom,r','phy:/dev/vg_guest/ubuntu1110,hda,w']
>>> boot="dn"
>>> vif = [ 'type=ioemu,model=e1000,mac=00:0f:4b:00:00:66, bridge=switch' ]
>>> vnc=1
>>> vnclisten="0.0.0.0"
>>> usb=1
>>> xen_platform_pci=1
>>> usbdevice='tablet'
>>>
>>> And found out that the i386 does not have PAE built in, so the whole Xen
>>> subsystem is turned off (oops) - that actually looks like a bug b/c I think
>>> the PV drivers in HVM mode ought to work in non-PAE mode.. It means that
>>> the guest is running completly as HVM.
>>>
>>> But then I thought - surely the x86_64 should work. So botted it up, saw
>>> xen-platform-pci do the unplugging off the QEMU drivers, and .. then no
>>> network nor any disk - it looks like both xen-netfront and xen-blkfront
>>> don't get loaded? Looking in /lib/modules/*/ shows that they exist - so they
>>> are compiled in.
>>>
>>> Is that a known bug or should I open a BZ for that? Thanks.
>>>
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@lists.xen.org
>>> http://lists.xen.org/xen-devel
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel



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Re: Ubuntu 11.04 (amd64 and i386) under Xen as PV on HVM guests don't load the PV drivers.

[Ian Campbell]

On Mon, 2012-03-26 at 21:59 +0100, Konrad Rzeszutek Wilk wrote:
> And found out that the i386 does not have PAE built in, so the whole Xen
> subsystem is turned off (oops) - that actually looks like a bug b/c I think
> the PV drivers in HVM mode ought to work in non-PAE mode..

It is possible in theory for them to work but in practice
CONFIG_XEN_PVHVM is rather entangled with CONFIG_XEN (which depends on
PAE). It's mostly a case of refactoring + getting the ifdeffery right,
fiddly but doable.

Ian.