[Xen-devel] Re: [pvops xen/next ][iommu] attenpt to passthrough PCI-e usb controllor to PV domU SUCCESS :-)

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Mar 22, 2010 at 10:23:00PM +0100, Sander Eikelenboom wrote:
> Hello Pasi,
> 
> Ok added a few lines about it to that page.
> 

Ok. Are those options only needed for pvops domU kernel,
or also for linux-2.6.18-xen guests? 

-- Pasi

> 
> Sander
> 
> Monday, March 22, 2010, 9:49:16 PM, you wrote:
> 
> > On Mon, Mar 22, 2010 at 09:35:50PM +0100, Sander Eikelenboom wrote:
> >> Hi Konrad,
> >> 
> >> Thx again and again and again :-)
> >> Works like a charm by adding these to the domU kernel options.
> >> I saw a lot of your hard work on the swiotlb on LKML as well, would be 
> >> nice if it would be accepted together with pci-front,
> >> that would make mainline kernels as domU work with pci-passthrough as well.
> >> 
> >> I now got it running with the linux 2.6.33 tree from your git tree, which 
> >> is of course also very recent :-)
> >> 
> >> Now running on:
> >> hypervisor: xen-4.0.0-rc6
> >> dom0: xen-next
> >> domU: 2.6.33 tree with pcifront and swiotlb from Konrad's git tree, and 
> >> with some additional patches to het isochronous URB's working on the USB 
> >> 3.0 xHCI driver from linux-usb mailing lists.
> >> 
> >> 
> >> Pasi, perhaps a good thing to point out in the passthrough wiki pages (at 
> >> least when using pvops kernels),
> >>
> 
> > Yeah.. hmm.. so what should I add? You can also add it yourself ;)
> 
> > The current version is here:
> > http://wiki.xensource.com/xenwiki/XenPCIpassthrough
> 
> > still a work-in-progress.. 
> 
> >> BTW how do you handle tables in the wiki's ?
> >> Because i tried with the xen-hypervisor-boot-options page, but it was a 
> >> real pain in the *ss to set it up.
> >> 
> 
> > iirc in the GUI editing mode you can just right-click on the table and 
> > add/delete rows/columns etc? 
> 
> > -- Pasi
> 
> >> 
> >> --
> >> Sander
> >> 
> >> 
> >> 
> >> Monday, March 22, 2010, 8:12:37 PM, you wrote:
> >> 
> >> > On Mon, Mar 22, 2010 at 11:15:24AM +0100, Sander Eikelenboom wrote:
> >> >> Hello Weidong/Konrad,
> >> >> 
> >> >> 1) With iommu=0, the DMAR fault is gone (of course), but
> >> >>         > (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b 
> >> >> from 00000a07:00000000 to 00000000:00000000.
> >> >>         Stays in xm-dmesg, the pv guests is booted, and lspci shows the 
> >> >> pci device. But the device doesn't function properly.
> >> 
> >> > How does it not function properly? Was this related to the IOMMU error ?
> >> > Did you point it out to me previously and I missed it? If so, can you
> >> > resend it to me please.
> >> 
> >> > If the problem is with the message about needing 'swiotlb=force' to be
> >> > passed, 'iommu=soft swiotlb=force' should take care of that. 
> >> 
> >> 
> >> 
> >> 
> >> -- 
> >> Best regards,
> >>  Sander                            mailto:linux@xxxxxxxxxxxxxx
> >> 
> 
> 
> 
> -- 
> Best regards,
>  Sander                            mailto:linux@xxxxxxxxxxxxxx
> 

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