I encountered the same "IOMMU width is not sufficient" issue. Using VFIO works ok for me.
On Wed, Aug 6, 2014 at 2:31 PM, Alex Williamson <alex.william...@redhat.com> wrote: > On Wed, 2014-08-06 at 14:22 -0700, Nishank Trivedi wrote: >> Hi >> >> I'm trying to do a pci-passthrough of Intel 82599 10GbE card, with guest >> having 8G of memory. I see following error - >> >> intel_iommu_map: iommu width (48) is not sufficient for the mapped >> address (fffffffffe001000) >> kvm_iommu_map_address:iommu failed to map pfn=45800 >> >> I checked IOMMU capability register and SAGAW as well as MGAW are 48bits >> for both IOMMU. >> >> # dmesg | grep ecap >> dmar: IOMMU 0: reg_base_addr dfff0000 ver 1:0 cap d2078c106f0462 ecap f020fe >> dmar: IOMMU 1: reg_base_addr bfff0000 ver 1:0 cap d2078c106f0462 ecap f020fe >> >> # cat /proc/cpuinfo | grep "address sizes" >> address sizes : 46 bits physical, 48 bits virtual >> >> In DMAR table, I see host address width set to "2D", i.e. 46bit, which >> is ok as it is same as physical address size. Any suggestions on what >> might be going wrong here? > > Try vfio-pci instead of pci-assign > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
