On Mon, Apr 19, 2010 at 01:59:25PM +0200, Kalle Happonen wrote:
> Hello all,
> I'm trying to get an infiniband device passed through to a domU on 
> Centos5 (standard centos5 xen, both dom0 and domU). The device in 
> question is
> InfiniBand: Mellanox Technologies MT26418 [ConnectX VPI PCIe 2.0 5GT/s - 
> IB DDR / 10GigE] (rev a0)
>
> Now, I hid the device, added it to the domU and all that went well. 
> lspci on the domU sees the device and all, but it seems it can't use it. 
> The domU itself says
>
> -bash-3.2# echo -n ".&checktime(0000,00,00,':').0" > /sys/bus/pci/drivers/mlx4_core/bind
> PCI: Enabling device .&checktime(0000,00,00,':').0 (0000 -> 0002)
> mlx4_core .&checktime(0000,00,00,':').0: Couldn't map HCA reset register, aborting.
> mlx4_core .&checktime(0000,00,00,':').0: Failed to reset HCA, aborting.
> mlx4_core: probe of .&checktime(0000,00,00,':').0 failed with error -12
> -bash: echo: write error: Cannot allocate memory
>
> Adn "xm dmesg" says
> (XEN) mm.c:625:d34 Non-privileged (34) attempt to map I/O space 000fdff0
>
> I assume the permissions to access the memory, and I read that putting 
> this in /etc/xen/xend-pci-permissive.sxp should help
>
> (unconstrained_dev_ids
> ('15b3:6732')
> )
>
> ('15b3:6732' gotten from lspci -n)
>
> This doesn't seem to help. Is there still something I need to do, 
> anything I have missed?
>
I don't know if this will help but here goes anyway:
http://wiki.xensource.com/xenwiki/XenPCIpassthrough
-- Pasi
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