Re: [Xen-users] virtualization doesn't work with xen 4.4

[Jacek Konieczny <jajcus@xxxxxxxxxx>]

On 2014-04-27 12:23, Michael Mair-Keimberger wrote:
> I've recently updated my xen setup from 4.1 to 4.4. Now it's impossible
> for me to start any (basic) vm.

Any basic HVM, I guess. I don't think the problem appears on PV virtual
machines.

> My basic config looks like this atm:
> 
>> on_poweroff='destroy'
>> on_reboot='destroy'
>> on_crash='destroy'
>>
>> disk=['file:/home/michael/xen/win7x64s.img,hda,w','file:/home/michael/xen/dvd/win7x64.iso,hdc:cdrom,r']
>> vif=['mac=DE:AD:CA:5E:13:37,bridge=br0,type=ioemu']
>>
>> boot='d'
>>
>> name = 'HVM_domU'
>> builder = 'hvm'
>> memory = 256
>> vcpus = 2
>> vnc = 1
>> vnclisten = '0.0.0.0'
>> vncdisplay = 1
> 
> When i try to start this, xen immediately kills the vm again. 
> From the logs i get following:

[...]

> xl dmesg only shows one returning error, which didn't help me at all as i
> couldn't find any usefull help about this message:
> 
>> (XEN) io.c:204:d2 MMIO emulation failed @ 0008:ffff1f50: 4a 00 00 00 00 00 
>> 00 00 36 99

I have already reported a very simila problem, here:

http://lists.xen.org/archives/html/xen-users/2014-04/msg00084.html

For me this occurs only with HVM guests using the default 'qemu-xen'
device model.

PV and PVH with 'qemu-xen-traditional' device model work for me.

I assumed the problem was related to the system qemu I use instead of
the qemu built from the Xen sources (I prefer not to maintain multiple
qemu builds for a distribution I work for). I am not sure if this would
occur with the 'qemu-xen' from the Xen sources in my case.

Greets,
    Jacek

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