Re: [Xen-users] PCI Passthrough for Windows error

["Todd Deshane" <deshantm@xxxxxxxxx>]

On Tue, Nov 11, 2008 at 3:16 PM, billy lau <billylau@xxxxxxxxx> wrote:
>
>
> On Tue, Nov 11, 2008 at 3:13 PM, Todd Deshane <deshantm@xxxxxxxxx> wrote:
>>
>> On Tue, Nov 11, 2008 at 3:09 PM, billy lau <billylau@xxxxxxxxx> wrote:
>> >
>> >
>> > On Tue, Nov 11, 2008 at 3:03 PM, Todd Deshane <deshantm@xxxxxxxxx>
>> > wrote:
>> >>
>> >> On Tue, Nov 11, 2008 at 2:47 PM, billy lau <billylau@xxxxxxxxx> wrote:
>> >> > Hi, sorry, it took me quite a while, because I was trying other ways
>> >> > to
>> >> > get
>> >> > around htis prblem, but it seems like I cannot get pass this.
>> >> >
>> >> > Attached is the output from
>> >> > lspci -tv
>> >> > lspci -xxx -vvv
>> >> > xm pci-list-assignable-devices returns nothing
>> >> > ls /sys/bus/pci/drivers/pciback*
>> >> > grep hide /boot/grub/menu.lst
>> >> >
>> >> > The Linux guest taht worked before was PV.
>> >> >
>> >> > xm dmesg shows
>> >> > (XEN) HVM: VMX enabled
>> >> > and
>> >> > (XEN) I/O virtualisation disabled
>> >> > (XEN) Xen trace buffers: disabled
>> >> >
>> >> > I'm not sure if this means iommu is disabled. If it is, what should I
>> >> > do
>> >> > to
>> >> > enable it? Thanks,
>> >> > - billy
>> >> >
>> >>
>> >> There is a separate bios option to enable the IOMMU (VT-d) (IO
>> >> virtualization support)
>> >>
>> >> Did you verify that your Chipset support VT-d? That is the first step.
>> >
>> >
>> > Yeah, I made sure that in my bios, under performance, virtualization is
>> > turned on, and also IOMMU is turned on. My chipset is Intel(R) Xeon(R)
>> > E5430
>> > @ 2.66GHz. I googled that up, it supports VT-d. What do you mean by a
>> > _separate_ bios option?
>> >
>>
>> VT (virtualization support) has a bios option, VT-d (IO virtualizaiton)
>> has
>> another.
>
> I see. Yes, I have confirmed that both options are on in the bios.
>
>>
>> Did you turn the computer off (not just restart) after setting that
>> option?
>
> Yes.
>
>>
>> The xm dmesg should show that I/O virtualization is enabled.
>
> Doing another xm dmesg, it still shows (XEN) I/O virtualisation disabled.
> Any other thoughts on how to turn it on?
>

What version of Xen?

Have you or could you try xen-unstable?

Cheers,
Todd

-- 
Todd Deshane
http://todddeshane.net
http://runningxen.com

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users