[Xen-devel] [PATCH] VT-d: prevent dom0 to use VT-d HW

["Han, Weidong" <weidong.han@xxxxxxxxx>]

pv-ops dom0 contains Linux upstream VT-d driver, and will go to enable it when 
VT-d is set in kernel config file. It should not enable VT-d in dom0.

Currently it already zaps ACPI DMAR signature to prevents dom0 using VT-d HW 
when VT-d is enabled for Xen. But when VT-d is not enabled for Xen, and VT-d is 
set in pv-ops kernel config file, pv-ops dom0 will go to enable it. This will 
results in pv-ops dom0 booting failure. This patch prevents dom0 to use VT-d HW 
whether VT-d is enabled or disabled for Xen. 

Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>

Attachment: disable-dom0-vtd.patch
Description: disable-dom0-vtd.patch

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