Re: [Xen-devel] PCI passthrough issue

[Jean Baptiste Favre <xen-devel@xxxxxxxxxxx>]

Hello,
Sorry for long silence: had some hollidays :)

On 16/03/2011 04:14, Konrad Rzeszutek Wilk wrote:
> On Fri, Mar 04, 2011 at 08:25:49AM +0100, Jean Baptiste Favre wrote:
>> Hello Konrad,
>>
>> Le 03/03/2011 23:58, Konrad Rzeszutek Wilk a écrit :
>>>> I don't remember such problem. Could this module be
>>>>
>>>> BTW, I'm checking that rebuilding OpenWRT.
>>>
>>> OK.
>>>
>>> To eliminate this being the kernel, I took the
>>>
>>> trunk/build_dir/toolchain-i386_gcc-linaro_uClibc-0.9.32/linux-2.6.37
>>> (which has a bunch of patches on top of stock 2.6.37)
>>>
>>> compiled it outside the OpenWRT and tried to passthrough the same
>>> adapter. It worked. But let me try to follow your directions
>>> below tomorrow and see what progress I can make.
>> Hello,
>> One tought or two between wake-up and leaving for work :-)
> 
> I haven't gotten back on this - sorry about this.
> 
> The other thing that might be going wrong is that CONFIG_PCI_QUIRKS is not
> turned on in the OpenWRT build. Perhaps there are some work-arounds for the
> driver that aren't enabled with OpenWRT build? You could try to
> build a debian kernel using the OpenWRT .config and seeing if
> it works right?
In my setup, CONFIG_PCI_QUIRKS is enabled. As default compilation did
not worked, I took all XEN and PCI related config options from Debian
kernel and manually added them in target/linux/x86/xen_domu/config-default

As a consequence, its activated in final kernel but with no change :(


>> trunk/build_dir/toolchain-i386_gcc-linaro_uClibc-0.9.32/linux-2.6.37
>>  is kernel builddir. So, if it works from here, there's no reason it
>> finaly doesn't.
>>
>> One tought: in "make menuconfig", you will setup the Openwrt's
>> package/features list. If you have one package marked "M", that means
>> it'll be build as separate package (*.opkg). If marked with "y", it'll
>> be integrated within FS image.
>>
>> For you kernel module xen-pcifront, you have to make sure that:
>> - it's marked in trunk/.config
>> - it's marked in kernel config file
>>
>> You can check after compliation:
>> ls -l build_dir/linux-x86_xen_domu/packages/ipkg-x86/kmod-xen-pcidev/
>> total 12
>> drwxr-xr-x 2 jbfavre jbfavre 4096 Mar  4 01:09 CONTROL
>> drwxr-xr-x 3 jbfavre jbfavre 4096 Mar  4 01:09 etc
>> drwxr-xr-x 3 jbfavre jbfavre 4096 Mar  4 01:09 lib
>> jbfavre@xps-103:~/openwrt/trunk$ ls -l
>> build_dir/linux-x86_xen_domu/packages/ipkg-x86/kmod-xen-pcidev/lib/modules/2.6.37/platform-pci.ko
>>
>> -rw-r--r-- 1 jbfavre jbfavre 4936 Mar  4 01:09
>> build_dir/linux-x86_xen_domu/packages/ipkg-x86/kmod-xen-pcidev/lib/modules/2.6.37/platform-pci.ko
>>
>> So, not sure you patch is mandatory, is it ?
> 
> Probably not.
> 
> Will get back to this after the XenHackothon.
Hope this goes well :)

Regards,
JB

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