On Fri, 22 Nov 2019 15:07:30 +0530 Venumadhav Josyula <vjosy...@gmail.com> wrote:
> Hi All, > We are trying to use vfio-pci. We have following > - intel_iommu=on in bios > - it shows in /proc/cmdline > > [root@vflac2-kvm ~]# cat /proc/cmdline > BOOT_IMAGE=/vmlinuz-3.10.0-957.1.3.el7.x86_64 root=/dev/mapper/c7--kvm-root > ro crashkernel=auto rd.lvm.lv=c7-kvm/root rd.lvm.lv=c7-kvm/swap rhgb > quiet *intel_iommu=on > *isolcpus=2,3,6,7 > [root@vflac2-kvm ~]# dmesg | grep IOM > *[ 0.000000] DMAR: IOMMU enabled* As explained in [1] this only indicates the processing of the intel_iommu=on command line option. Full dmesg might be required to understand the issue. > [root@vflac2-kvm ~]# uname -mrs > Linux 3.10.0-957.1.3.el7.x86_64 x86_64 > [root@vflac2-kvm ~]# ls /sys/kernel/iommu_groups/ > > *[root@vflac2-kvm ~]# ls -al /sys/kernel/iommu_groups/total 0* > > > > 04:00.0 Ethernet controller: Intel Corporation Ethernet Controller > 10-Gigabit X540-AT2 (rev 01) > 04:00.1 Ethernet controller: Intel Corporation Ethernet Controller > 10-Gigabit X540-AT2 (rev 01) > 04:10.0 Ethernet controller: Intel Corporation X540 Ethernet Controller > Virtual Function (rev 01) > 04:10.2 Ethernet controller: Intel Corporation X540 Ethernet Controller > Virtual Function (rev 01) > 05:00.0 Ethernet controller: Intel Corporation Ethernet Controller X710 for > 10GbE SFP+ (rev 02) > 05:00.1 Ethernet controller: Intel Corporation Ethernet Controller X710 for > 10GbE SFP+ (rev 02) > > Can u suggest what could wrong ? We are seeing no iommu_groups getting > created. What's the CPU model? There are some that don't have IOMMU support. Thanks, Alex [1]http://vfio.blogspot.com/2016/09/intel-iommu-enabled-it-doesnt-mean-what.html _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
