Re: [Xen-devel] PCI passthrough issue

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

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?

> 
> 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.
> 
> Regards,
> JB
> 
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