dmesg | grep IOMMU give me

[ 0.524694] DMAR: IOMMU enabled 
[ 0.871522] DMAR-IR: IOAPIC id 3 under DRHD base 0xfbffe000 IOMMU 0 
[ 0.871523] DMAR-IR: IOAPIC id 0 under DRHD base 0x9fffe000 IOMMU 1 
[ 0.871524] DMAR-IR: IOAPIC id 2 under DRHD base 0x9fffe000 IOMMU 1 
[ 3.018355] AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de> 
[ 3.018364] AMD IOMMUv2 functionality not available on this system