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[Xen-devel] Re: vt-d p7p55d evo

Mark Hurenkamp wrote:
I'm still pretty new to Xen so it could very well be that I've misunderstood the requirements for certain capabilities. I thought one of the wiki's had stated that to pass through to an hvm guest you have to have VT-d though. Is there something specific that I which can indicate its status after boot?

bios: 1207
cpu: i7 860
grub2: http://pastebin.ca/1856369
xm dmesg: http://pastebin.ca/1856370
xm info: http://pastebin.ca/1856372
hvm cfg: http://pastebin.ca/1856376
I think I compiled the linux kernel at xen/stable git commit 221c4dbf86 given the timestamp in xm info (all done same time frame)

From your earlier mail, it was not clear wether you were indeed using hvm, and that xen enabled vt-d properly. From your xm dmesg, and xm info, it is clear that iommu is indeed enabled for you, something which i've not been able to achieve with my board. Could the CPU make a difference here? I'm on a i5 750, and notice you are using an i7 860....

I'll see if i can do some more experiments with my setup, perhaps switching back a few changesets to 4.0-rc8. I'm not sure if the kernel makes a difference, but i'll see if i can match your configuration as close as possible.

Thanks for your input!


according to this chart (and thread) the i5 doesn't support VT-d, http://i683.photobucket.com/albums/vv199/OvrClkr/i5_chart.png
link source: http://www.tomshardware.com/forum/274342-28-tomshardware

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