On Fri, May 28, 2010 at 01:16:57AM +0800, lei yang wrote:
> On Thu, May 27, 2010 at 10:51 PM, lei yang <[1]yanglei.fage@xxxxxxxxx>
> wrote:
>
> > Â Â my *intent* it to let domU to use "05:00.0" device.
> >
> >   boot dom0 with  "pci=resource_alignment=05:00.0
> > Â Â xen-pciback.hide=(05:00.0)" appended
> >
> > Â Â my domU config file is
> >
> > Â Â disk = ['tap:aio:/domU.image,xvda1,w',
> 'tap:aio:/domUswap.image,xvda2,w']
> > Â Â kernel = "/bzImage"
> > Â Â vcpus=2
> >   vif  = [ "mac=00:15:17:AC:00:40,ip=128.224.165.204" ]
> > Â Â root = "/dev/xvda1 ro"
> > Â Â extra= "xen console=hvc0"
> > Â Â pci = ['05:00.0']
> >
> > Â Â Is there something I missed? eg: my cfg file or other
> configure? or other
> > Â Â steps
> >
>
> Yes, you're missing the required parameters for the domU kernel.
>
> See: [2]http://wiki.xensource.com/xenwiki/XenPCIpassthrough
>
> Â
> Â
> Thanks Pasik "I will add "iommu=soft swiotlb=force"ã**does it add into
> "domU.cfg" file with
> Â Â Â disk = ['tap:aio:/domU.image,xvda1,w',
> 'tap:aio:/domUswap.image,xvda2,w']
> Â Â Â kernel = "/bzImage"
> Â Â Â vcpus=2
>    vif = [ "mac=00:15:17:AC:00:40,ip=128.224.165.204" ]
> Â Â Â root = "/dev/xvda1 ro"
> Â Â Â extra= "xen console=hvc0 iommu=soft swiotlb=force"
> Â Â Â pci = ['05:00.0']
> Â
> I just want to let domU nic using my pci nic directly. do I need to
> change my "  vif = [ "mac=00:15:17:AC:00:40,ip=128.224.165.204" ]"
> or remove it?
>
You don't need to remove it.. it'll just create a virtual interface
(xen-netfront)
to the domU. It doesn't conflict with the PCI passthru.
>
> Â
> if I remove "vif = [ "mac=00:15:17:AC:00:40,ip=128.224.165.204" ]"
> Â
> I find I can't find a networking interface
> Â
> [3]root@localhost:/root> ifconfig
> [4]root@localhost:/root> ifconfig eth0 up
> eth0: ERROR while getting interface flags: No such device
> [5]root@localhost:/root> ifconfig eth1 up
> eth1: ERROR while getting interface flags: No such device
> [6]root@localhost:/root> ifconfig -a
> lo       Link encap:Local Loopback
> Â Â Â Â Â Â Â Â Â LOOPBACKÂ MTU:16436Â Metric:1
> Â Â Â Â Â Â Â Â Â RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> Â Â Â Â Â Â Â Â Â TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> Â Â Â Â Â Â Â Â Â collisions:0 txqueuelen:0
> Â Â Â Â Â Â Â Â Â RX bytes:0 (0.0 b)Â TX bytes:0 (0.0 b)
> [7]root@localhost:/root> lspci
> [8]root@localhost:/root>
> Â
>
Does your domU kernel have xen-pcifront driver? is it loaded?
that's required for PCI passthrough to PV guests.
Note that upstream (kernel.org) kernels don't yet have xen-pcifront included.
-- Pasi
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