[Xen-users] Guest crashing after real-mode call to a VT-D passed

To:	"Xen Users" <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject:	[Xen-users] Guest crashing after real-mode call to a VT-D passed device
From:	"Bryan York" <bryan.york@xxxxxxxxx>
Date:	Mon, 22 Sep 2008 15:22:36 -0700
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Hello,

I'm trying to run a Xen guest with a disk controller passed to it with VT-D. I've been on the mailing lists and found that I need to do the following:

Run BIOS 0559 on my motherboard DQ35JO.
Run xen-unstable on a CentOS 5.2 customized kernel with pciback compiled in. (not as a module)
Add iommu=1 to my kernel grub entry and pciback.hide on my module line.
Add pci = [my pci device] to my xen guest file.

Basically, I'm trying to run a hard disk diagnostic program that requires direct access the hardware. (real-mode calls) Right now with the above steps, I don't get anymore errors, but the guest crashes when it tries to access the controller. Any ideas here? I'm not sure if this is even possible because of the real mode calls.

Thanks,

-Bryan

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[Xen-users] Guest crashing after real-mode call to a VT-D passed device