Is there a quick way to check if system has IOMMU enabled in Linux? I saw the following messages in /var/log/messages: Apr 3 21:03:16 kernel: PCI-DMA: Disabling AGP. Apr 3 21:03:16 kernel: PCI-DMA: aperture base @ f4000000 size 65536 KB Apr 3 21:03:16 kernel: init_memory_mapping: 00000000f4000000-00000000f8000000 Apr 3 21:03:16 kernel: last_map_addr: f8000000 end: f8000000 Apr 3 21:03:16 kernel: PCI-DMA: using GART IOMMU. Apr 3 21:03:16 kernel: PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture Does this mean IOMMU is enabed? And i don't need anything like iommu=force in boot option, right? CPU I used is the latest AMD Opteron Quad-core cpus. I didn't see any IOMMU setting option in BIOS, only enabling virtulization option is there. Is this the only option we need to enable? Thanks Eric _________________________________________________________________ Rediscover Hotmail®: Get e-mail storage that grows with you. http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Storage1_042009-- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
