Re: [Xen-users] (pv)hvm, upstream qemu 1.7.1

[Jacek Konieczny <jajcus@xxxxxxxxxx>]

On 05/07/14 18:55, Stefano Stabellini wrote:
> On Mon, 14 Apr 2014, Ian Campbell wrote:
>> Anthony, Stefano: Any idea what this issue is?
>>
>> On Fri, 2014-04-11 at 21:44 +0200, Jacek Konieczny wrote:
>>>
>>> What does not work is (PV)HVM with device_model_version="qemu-xen". My
>>> Xen is compiled with '--with-system-qemu=...' and uses the system
>>> qemu-system-x86_64 binary, which is qemu 1.7.1.
>>>
>>> This is supposed to work, according to
>>> http://wiki.xen.org/wiki/QEMU_Upstream.
> 
> Sorry for the late reply.
> If you compile qemu-system-i386 instead of qemu-system-x86_64, does that
> work for you?

That only changes the default DM path, right?

So, I have tried:

device_model_override = "/usr/bin/qemu-system-i386"

And this changed nothing.

I have noticed something else thoughâ

The config file I have been playing with contains:

memory = 256

And trying to boot the domain causes 'MMIO emulation failed' errors with
various code:

(XEN) io.c:204:d1 MMIO emulation failed @ 0008:ffff34d1: 10 90 39 00 04
83 ff ff 06 02
(XEN) io.c:204:d2 MMIO emulation failed @ 0008:ffff34d1: e0 29 00 08 e0
82 ff ff cd 18
(XEN) io.c:204:d3 MMIO emulation failed @ 0008:ffff34d1: 50 16 57 00 04
83 ff ff 06 02
(XEN) io.c:204:d4 MMIO emulation failed @ 0008:ffff34d1: 20 5a 57 00 04
83 ff ff 06 02

(XEN) io.c:204:d16 MMIO emulation failed @ 0008:ffff34d1: e0 29 00 08 e0
82 ff ff cd 18
(XEN) io.c:204:d17 MMIO emulation failed @ 0008:ffff34d1: 10 29 57 00 04
83 ff ff 06 02
(XEN) io.c:204:d18 MMIO emulation failed @ 0008:ffff34d1: e0 29 00 08 e0
82 ff ff cd 18

but when I changed it to 'memory = 4096' (with an assumption that 256MB
may be
a bit to little for a 64-bit HVM guest) the VM still failed, but with
more consistent error messages:

(XEN) io.c:204:d10 MMIO emulation failed @ 0008:ffff34d1: 6a 05 40 00 00
00 00 00 01 00
(XEN) io.c:204:d11 MMIO emulation failed @ 0008:ffff34d1: 6e 05 40 00 00
00 00 00 01 00
(XEN) io.c:204:d12 MMIO emulation failed @ 0008:ffff34d1: 6e 05 40 00 00
00 00 00 01 00
(XEN) io.c:204:d13 MMIO emulation failed @ 0008:ffff34d1: 6d 05 40 00 00
00 00 00 01 00
(XEN) io.c:204:d14 MMIO emulation failed @ 0008:ffff34d1: 6d 05 40 00 00
00 00 00 01 00
(XEN) io.c:204:d15 MMIO emulation failed @ 0008:ffff34d1: 6d 05 40 00 00
00 00 00 01 00

I guess this may be of little help, but maybeâ

Greets,
        Jacek

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