On Thu, 5 May 2016 15:40:29 +0000 "MEHAN, MUNISH" <mm6...@att.com> wrote:
> All, > > I am trying to load a vfio driver for the Intel VFs. I am seeing the > following error from kernel. I tried all the grub options with > iommu=on,iommu=pt, intel_iommu=on, intel_iommu=pt,isolcpus=2,4 etc. > > Can someone suggest what can be issue here and how I can mitigate this. > > [Wed May 4 12:13:47 2016] dmar: DMAR:[DMA Write] Request device [86:00.1] > fault addr 1f3521a000 > [Wed May 4 12:13:47 2016] DMAR:[fault reason 05] PTE Write access is not set > [Wed May 4 12:13:49 2016] dear: DMAR:[DMA Write] Request device [86:00.1] > fault addr 1f35219000 > [Wed May 4 12:13:49 2016] DMAR:[fault reason 05] PTE Write access is not set > [Wed May 4 12:13:49 2016] dmar: DMAR:[DMA Write] Request device [86:00.1] > fault addr 1f35218000 > [Wed May 4 12:13:49 2016] DMAR:[fault reason 05] PTE Write access is not set > [Wed May 4 12:13:51 2016] dmar: DMAR:[DMA Write] Request device [86:00.1] > fault addr 1f35217000 > [Wed May 4 12:13:51 2016] DMAR:[fault reason 05] PTE Write access is not set > [Wed May 4 12:13:53 2016] dmar: DMAR:[DMA Write] Request device [86:00.1] > fault addr 1f35216000 > [Wed May 4 12:13:53 2016] DMAR:[fault reason 05] PTE Write access is not set > [Wed May 4 12:13:55 2016] dmar: DMAR:[DMA Write] Request device [86:00.1] > fault addr 1f35215000 > [Wed May 4 12:13:55 2016] DMAR:[fault reason 05] PTE Write access is not set You get this while the VM is running? The fault address is up past 124GB, is it safe to assume you are not running a 124GB VM? Please provide host dmesg booted without iommu=pt and QEMU invocation (available in /var/log/libvirt/qemu/ if using libvirt). Thanks, Alex _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
