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

[Michael Mair-Keimberger <m.mairkeimberger@xxxxxxxxx>]

Hi lists,

I've recently updated my xen setup from 4.1 to 4.4. Now it's impossible
for me to start any (basic) vm.
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-HVM_domU.log:

> Waiting for domain HVM_domU (domid 2) to die [pid 3429]
> Domain 2 has shut down, reason code 1 0x1
> Action for shutdown reason code 1 is destroy
> Domain 2 needs to be cleaned up: destroying the domain
> Done. Exiting now

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

Unfortunately it seems it has something todo with MMIO emulation failed.
However i have no idea what todo here.
I've checked if hvm does work, but since get following in xl dmesg, it
should work.

> (XEN) HVM: ASIDs enabled.
> (XEN) SVM: Supported advanced features:
> (XEN)  - Nested Page Tables (NPT)
> (XEN)  - Last Branch Record (LBR) Virtualisation
> (XEN)  - Next-RIP Saved on #VMEXIT
> (XEN)  - VMCB Clean Bits
> (XEN)  - DecodeAssists
> (XEN)  - Pause-Intercept Filter
> (XEN)  - TSC Rate MSR
> (XEN) HVM: SVM enabled
> (XEN) HVM: Hardware Assisted Paging (HAP) detected
> (XEN) HVM: HAP page sizes: 4kB, 2MB, 1GB

This is on a gentoo system with kernel 3.14.1 and gcc 4.8.2.

Any help would be much appreciated.
-- 
greetings
Michael Mair-Keimberger

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