PWE on Redhat 6.2 / Centos 6

Can't make it work with VT-D, i see there is couple of thread about parallels Workstation
but i am not sure those patch apply to parallels workstation extreme...event if the bug is related.

however i am unable to make it work by adding those line in grub
intel_iommu=0,intel_iommu=1, intel_iommu=on, intel_iommu=off, iommu=off,iommu=soft, iommu=on

it look like it can't load DMAR table..

i am pretty sure i am not the first one to encounter this problem, is there a workaround this issue ?


thanks