dmesg | grep -e DMAR -e IOMMU -e AMD-Vi
[ 0.010526] ACPI: DMAR 0x000000007B92C960 0000BC (v01 ALASKA A M I 00000001 INTL 20091013)
[ 0.449045] DMAR: Host address width 46
[ 0.449047] DMAR: DRHD base: 0x000000fbffc000 flags: 0x1
[ 0.449053] DMAR: dmar0: reg_base_addr fbffc000 ver 1:0 cap 8d2078c106f0466 ecap f020df
[ 0.449056] DMAR: RMRR base: 0x0000007db88000 end: 0x0000007db97fff
[ 0.449058] DMAR: ATSR flags: 0x0
[ 0.449060] DMAR: RHSA base: 0x000000fbffc000 proximity domain: 0x0
[ 0.449063] DMAR-IR: IOAPIC id 1 under DRHD base 0xfbffc000 IOMMU 0
[ 0.449065] DMAR-IR: IOAPIC id 2 under DRHD base 0xfbffc000 IOMMU 0
[ 0.449067] DMAR-IR: HPET id 0 under DRHD base 0xfbffc000
[ 0.449069] DMAR-IR: Queued invalidation will be enabled to support x2apic and Intr-remapping.
[ 0.449368] DMAR-IR: Enabled IRQ remapping in x2apic mode
[ 6.511756] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <
jroedel@suse.de>
[ 6.512523] AMD-Vi: AMD IOMMUv2 functionality not available on this system