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Re: [Xen-users] [Xen-API] XCP 1.6 beta Ram restriction for pci passthrough to pv Ubuntu 12.04 template

On Wed, Oct 24, 2012 at 06:41:39PM +0200, Markus Rhonheimer wrote:
> Hi,
> I use XCP 1.6.06 with a Ubuntu 12.04 64bit pv domU created with the template 
> through xencenter 6.1.
> I also used this command on xcp: xe vm-param-set 
> other-config:pci=0/0000:00:1f.2 uuid=d6eb559e-af70-6f8e-d10f-62fc9f73db89 
> which passes a "SATA controller: Intel Corporation 6 Series/C200 Series 
> Chipset Family SATA AHCI Controller (rev 05)" through to the domU. extlinux 
> boot configuration has the passthrough option.
> After booting the domU lspci shows the passed through device but none of the 
> attached HDDs are visible.
> This message can be seen within dmesg:


> The domU has about 8GB of Ram and therefore this bug seems to apply:
> http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1673
> This report mentions a more detailed thread at:
> http://www.gossamer-threads.com/lists/xen/devel/187533
> These are further informations about the host:

> The kernel version of the Ubuntu domU is:
> 3.2.0-32-generic
> I would appreciate any help. 
> Thanks in advance

Linux 3.2.0 does not support PCI passthru with >3G of RAM.
The issues is fixed in xen-pcifront driver in later kernel versions.

-- Pasi

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