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[Xen-users] vtd / pci passthru broken in 3.3?

To: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
From: "Andrew Lyon" <andrew.lyon@xxxxxxxxx>
Date: Thu, 27 Nov 2008 09:40:29 +0000
Delivery-date: Thu, 27 Nov 2008 01:41:15 -0800
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List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi,

Is vtd / pci passthru broken in 3.3? On my Supermicro x7dwa-n system I
was able to get pci passthru working with 3.2.1, but with 3.3 the xen
dmesg states that it is disabled:

(XEN) I/O virtualisation disabled

I used the same argument to enable vtd as I did with 3.2.1, is this correct:

(XEN) Command line: vtd=1 com1=115200,8n1 console=vga,com1 noirqbalance

Thanks
Andy

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