Re: [Xen-devel] Xen pci-passthrough problem with pci-detach and pci-assignable-remove

[George Dunlap <dunlapg@xxxxxxxxx>]

On Fri, Jan 24, 2014 at 1:36 PM, Sander Eikelenboom
<linux@xxxxxxxxxxxxxx> wrote:
>
> Friday, January 10, 2014, 6:38:10 PM, you wrote:
>
>>> > Wow. You just walked in a pile of bugs didn't you? And on Friday
>>> > nonethless.
>>>
>>> As usual ;-)
>
>> Ha!
>> ..snip..
>>> >> [  489.082358]  [<ffffffff81087ac6>] ? mutex_spin_on_owner+0x38/0x45
>>> >> [  489.106272]  [<ffffffff818e5e22>] ? schedule_preempt_disabled+0x6/0x9
>>> >> [  489.130158]  [<ffffffff818e7034>] ? __mutex_lock_slowpath+0x159/0x1b5
>>> >> [  489.154147]  [<ffffffff818e70a6>] ? mutex_lock+0x16/0x25
>>> >> [  489.177890]  [<ffffffff8135972d>] ? pci_reset_function+0x26/0x4e
>>>
>>> > Yeah, that bug my RFC patchset (the one that does the slot/bus reset) 
>>> > should also fix.
>>> > I totally forgot about it !
>>>
>>> Got a link to that patchset ?
>
>> https://lkml.org/lkml/2013/12/13/315
>
>>> I at least could give it a spin .. you never know when fortune is on your 
>>> side :-)
>
>> It is also at this git tree:
>
>> git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git and the
>> branch name is "devel/xen-pciback.slot_and_bus.v0". You will likely
>> want to merge it in your current Linus tree.
>
>> Thank you!
>
>
> Hi Konrad,
>
> Just got time to test this some more, when merging this branch *except* the 
> last commit (9599a5ad38a3bb250e996ccb2cdaab6fb68aaacd)
> seems to help with my problem,i'm no capable of using:
> - xl pci-detach
> - xl pci-assignable-remove
> - echo "BDF" > /sys/bus/pci/drivers/<devicename>/bind

Out of curiosity, have you tried adding the -r option to pci-assignable-remove?

xl pci-assignable-add will store the original driver to which the
device was bound in xenstore; if you do "xl pci-assignable-remove -r"
it will attempt to re-bind it to that driver.

See more information here:

http://blog.xen.org/index.php/2012/06/04/xen-4-2-preview-xl-and-pci-pass-through/

 -George

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel