On Sat, Apr 04, 2009 at 12:16:50AM +0000, Eric Liu wrote: > > 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? It means that you are running on an AMD system, and that this system has a GART. You need an isolation-capable IOMMU such as Intel's VT-d for KVM in-tree device passthrough. Cheers, Muli -- Muli Ben-Yehuda | muli@xxxxxxxxxx | +972-4-8281080 Manager, Virtualization and Systems Architecture Master Inventor, IBM Haifa Research Laboratory SYSTOR 2009---The Israeli Experimental Systems Conference http://www.haifa.il.ibm.com/conferences/systor2009/ -- 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
