Re: KVM for Linux 2.6.16?

[Alexander Graf <agraf@suse.de>]

On 09.07.2009, at 20:22, Fischer, Anna wrote:

>> Subject: Re: KVM for Linux 2.6.16?
>>
>> On Thu, 2009-07-09 at 16:49 +0000, Fischer, Anna wrote:
>>> Hi, I am trying to compile the kvm-87 module for Linux 2.6.16. I
>> thought that it has been back-ported to such an old kernel.  
>> However, I
>> don't seem to be able to compile the module on my kernel. I get the
>> following error:
>>>
>>>  CC    tsc2005.o
>>>  CC    scsi-disk.o
>>>  CC    cdrom.o
>>>  CC    scsi-generic.o
>>>  CC    usb.o
>>>  CC    usb-hub.o
>>>  CC    usb-linux.o
>>> In file included from usb-linux.c:41:
>>> /usr/include/linux/usbdevice_fs.h:49: error: expected ':', ',', ';',
>> '}' or '__attribute__' before '*' token
>>> /usr/include/linux/usbdevice_fs.h:56: error: expected ':', ',', ';',
>> '}' or '__attribute__' before '*' token
>>> /usr/include/linux/usbdevice_fs.h:66: error: expected ':', ',', ';',
>> '}' or '__attribute__' before '*' token
>>> /usr/include/linux/usbdevice_fs.h:100: error: expected ':', ',',  
>>> ';',
>> '}' or '__attribute__' before '*' token
>>> /usr/include/linux/usbdevice_fs.h:116: error: expected ':', ',',  
>>> ';',
>> '}' or '__attribute__' before '*' token
>>> usb-linux.c: In function 'async_complete':
>>> usb-linux.c:271: error: 'struct usbdevfs_urb' has no member named
>> 'actual_length'
>>> usb-linux.c: In function 'usb_host_handle_data':
>>> usb-linux.c:464: error: 'struct usbdevfs_urb' has no member named
>> 'buffer'
>>> usb-linux.c:465: error: 'struct usbdevfs_urb' has no member named
>> 'buffer_length'
>>> usb-linux.c:471: error: 'struct usbdevfs_urb' has no member named
>> 'number_of_packets'
>>> usb-linux.c:472: error: 'struct usbdevfs_urb' has no member named
>> 'iso_frame_desc'
>>> usb-linux.c:478: error: 'struct usbdevfs_urb' has no member named
>> 'usercontext'
>>> usb-linux.c: In function 'usb_host_handle_control':
>>> usb-linux.c:598: error: 'struct usbdevfs_urb' has no member named
>> 'buffer'
>>>
>>>
>>> Is KVM not supposed to work on 2.6.16?
>> Hi Anna,
>>
>> I'm afraid that I have some bad news for you. Usually KVM versions  
>> are
>> tailored to kernel versions contemporary with them. Version 87 is
>> supposed to need 2.6.26 kernels and newer, IIRC. So for your 2.6.16  
>> you
>> should try some of the incipient KVM versions, and if you are lucky
>> enough, they might work.
>
> So if I run an ancient Linux kernel, then I can only run with an  
> ancient KVM version? I thought the code was kept backwards  
> compatible to some extend?

It is, but nobody really tested it on such old systems I think.

The issue you're running into is in userland though and related to usb  
passthrough. So you should be able to get away with disabling HOST_USB  
in your config-host.mak file.

May I ask again why you need to have things running on 2.6.16?

Alex