root@pvestd:~# dmesg | grep DMAR
[    0.008322] ACPI: DMAR 0x0000000068106000 0000F8 (v01 INTEL  S2600WF  00000001 INTL 20091013)
[    0.008349] ACPI: Reserving DMAR table memory at [mem 0x68106000-0x681060f7]
[    0.503865] DMAR: IOMMU enabled
[    0.929194] DMAR: Host address width 46
[    0.929195] DMAR: DRHD base: 0x000000c5ffc000 flags: 0x0
[    0.929200] DMAR: dmar0: reg_base_addr c5ffc000 ver 1:0 cap 8d2078c106f0466 ecap f020de
[    0.929201] DMAR: DRHD base: 0x000000e0ffc000 flags: 0x0
[    0.929204] DMAR: dmar1: reg_base_addr e0ffc000 ver 1:0 cap 8d2078c106f0466 ecap f020de
[    0.929204] DMAR: DRHD base: 0x000000fbffc000 flags: 0x0
[    0.929207] DMAR: dmar2: reg_base_addr fbffc000 ver 1:0 cap 8d2078c106f0466 ecap f020de
[    0.929208] DMAR: DRHD base: 0x000000aaffc000 flags: 0x1
[    0.929210] DMAR: dmar3: reg_base_addr aaffc000 ver 1:0 cap 8d2078c106f0466 ecap f020de
[    0.929211] DMAR: RMRR base: 0x0000006796a000 end: 0x0000006796cfff
[    0.929212] DMAR: ATSR flags: 0x0
[    0.929214] DMAR-IR: IOAPIC id 12 under DRHD base  0xfbffc000 IOMMU 2
[    0.929214] DMAR-IR: IOAPIC id 11 under DRHD base  0xe0ffc000 IOMMU 1
[    0.929215] DMAR-IR: IOAPIC id 10 under DRHD base  0xc5ffc000 IOMMU 0
[    0.929215] DMAR-IR: IOAPIC id 8 under DRHD base  0xaaffc000 IOMMU 3
[    0.929216] DMAR-IR: IOAPIC id 9 under DRHD base  0xaaffc000 IOMMU 3
[    0.929216] DMAR-IR: HPET id 0 under DRHD base 0xaaffc000
[    0.929217] DMAR-IR: Queued invalidation will be enabled to support x2apic and Intr-remapping.
[    0.929916] DMAR-IR: Enabled IRQ remapping in x2apic mode
[    2.124720] DMAR: dmar2: Using Queued invalidation
[    2.124723] DMAR: dmar1: Using Queued invalidation
[    2.124725] DMAR: dmar0: Using Queued invalidation
[    2.124732] DMAR: dmar3: Using Queued invalidation
[    2.130687] DMAR: Intel(R) Virtualization Technology for Directed I/O