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

To: deshantm@xxxxxxxxx
Subject: Re: [Xen-users] PCI Passthrough for Windows error
From: "billy lau" <billylau@xxxxxxxxx>
Date: Tue, 11 Nov 2008 15:09:43 -0500
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
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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?

- billy

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