Re: FLR Patch for Xen 4.0

[Bei Guan <gbtju85@gmail.com>]

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There are some errors in the qemu log, for example:

......
xs_read(): fail to get num_devs. /local/domain/0/backend/pci/1/0/num_devs.
......
xs_read(/local/domain/0/device-model/1/xen_extended_power_mgmt): read error
......
xs_read(/local/domain/1/log-throttling): read error
......
pt_iomul_init: Error: pt_iomul_init can't open file /dev/xen/pci_iomul: No
such file or directory: 0x1:0x0.0x0


Are these errors have to do with VGA Passthrough?





2010/5/13 Han, Weidong <weidong.han@intel.com>

>  I didn’t try it recently. I think it should still work.
>
>
>
> Regards,
>
> Weidong
>
>
>
> *From:* Bei Guan [mailto:gbtju85@gmail.com]
> *Sent:* Thursday, May 13, 2010 10:34 AM
>
> *To:* Han, Weidong
> *Cc:* Xen Devel
> *Subject:* Re: [Xen-devel] FLR Patch for Xen 4.0
>
>
>
> Hi,
>
>
>
> Have you test the nVidia Geforce 8400 GS PCI Express x16 in xen4.0, which
> Mr. Teo Enming have test in xen 3.5-unstable branch wich some patch.
>
> http://lists.xensource.com/archives/html/xen-devel/2009-08/msg01013.html
>
>
> Thanks a lot!
>
>
>
>
>
>
>
>
>
> 2010/5/10 Han, Weidong <weidong.han@intel.com>
>
> If the device doesn’t support FLR capability, there will be a default reset
> for it, e.g. Dstate transition. But it doesn’t guarantee to work. For your
> ATI card, we didn’t try with it. Likely it cannot work. nVidia Quadro FX
> 3800 and IGD on Intel platforms (e.g. Q35 and Q45) were tested and works on
> current Xen upstream. Some other gfx cards  may work with extra patches
> (e.g. 1:1 map vBAR and pBAR). There were many emails to discuss it in
> xen-devel mailing list, you’d better to find and read those emails.
>
>
>
> Regards,
>
> Weidong
>
>
>
> *From:* Bei Guan [mailto:gbtju85@gmail.com]
> *Sent:* Monday, May 10, 2010 4:53 PM
> *To:* Han, Weidong
> *Cc:* Xen Devel
> *Subject:* Re: [Xen-devel] FLR Patch for Xen 4.0
>
>
>
> My VGA hardware is as following. Can I find a patch to make it support pci
> passthrough?
>
> #lspci
> ……
> 01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD
> 3450
>
>
> Xen4.0 can not support the ATI adapters defaultly, is it? Because my VGA
> passthrough can not work correctly.
>
>
>  2010/5/10 Han, Weidong <weidong.han@intel.com>
>
> There were several patches checked into xen for pci passthru, you can find
> relevant code in tools/python/xen/xend/server/pciif.py.
>
>
>
> Regards,
>
> Weidong
>
>
>
> *From:* xen-devel-bounces@lists.xensource.com [mailto:
> xen-devel-bounces@lists.xensource.com] *On Behalf Of *Bei Guan
> *Sent:* Monday, May 10, 2010 3:44 PM
> *To:* Xen Devel
> *Subject:* [Xen-devel] FLR Patch for Xen 4.0
>
>
>
> Hi,
>
> Is there a FLR patch for xen 4.0 PCI Passthrought ?
> Thanks.
>
> gavin
>
>
>
>
>

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