Re: [Xen-devel] [PATCH 0/2] Handle xen_platform_pci=0 case

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Friday, November 29, 2013, 5:06:20 PM, you wrote:

> Il 25/11/2013 12:11, Anthony PERARD ha scritto:
>> On Mon, Nov 25, 2013 at 10:04:59AM +0100, Fabio Fantoni wrote:
>>> Il 22/11/2013 17:54, Anthony PERARD ha scritto:
>>>> On Fri, Nov 22, 2013 at 04:49:06PM +0100, Fabio Fantoni wrote:
>>>>> Il 22/11/2013 16:13, Anthony PERARD ha scritto:
>>>>>> Hi,
>>>>>>
>>>>>> Here is a little series that attempt to fix the issue regarding
>>>>>> xen_platform_pci=0 not been handled.
>>>>>>
>>>>>> There are two patches, the first one adds an option to specifies the QEMU
>>>>>> machine that a user wants and we handle the xen_platform_pci=0 case 
>>>>>> using the
>>>>>> new option.
>>>>>>
>>>>>> The new options "qemu_machine_override" will help if one want to try a 
>>>>>> q35
>>>>>> based device model. Otherwise, it will be used by libxl to switch to the 
>>>>>> "pc"
>>>>>> machine instead of the "xenfv" one when necessary, as the only difference
>>>>>> between both (since QEMU 1.6) is the presence of the xen-platform pci 
>>>>>> device.
>>> About q35 in theory should be missing only the implementation in hvmloader,
>>> is there a draft somewhere to try or to should be made?
>> No, sorry, no draft. In hvmloader, there is an easy change, comment the
>> assert that prevent hvmloader from starting, but that only the
>> beginning.
>>

> Thanks for reply.

> Today I did the first tests with q35 on xen.
> I found that disks/cdrom not works with q35 and old qemu paramters used 
> by libxl.
> With new qemu parameters works and works also with sata instead ide.
> Probably next week I'll do libxl patches for initial draft of q35 
> support, new qemu parameters for disk/cdrom using upstream qemu and sata 
> support.

> I tried to boot Saucy hvm DomU with q35 and sata but qemu crash on 
> kernel loading, tried with both with and without xen-platform.
> On attachment the serial kernel logs of both cases.
> Can you take a look?

The logs are of the "xen-platform-pci=0" case i guess ?
Was your kernel patched with Konrad's draft patch ? (the oops is the same)
http://www.gossamer-threads.com/lists/xen/devel/308017#308017


Would be nice if the Q35 model works without too much effort :-)


> Thanks for any reply and sorry for my bad english.


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