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Description of problem: Assignment of BCM5719 NIC to a guest VM failed when vt-d enabled and intel_iommu=on Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1.enable vt-d in bios 2.pass intel_iommu=on to kernel 3.run virt-manager 4.add BCM5719 NIC to a guest 5.start guset OS,it will fail; show:unsupported configuration: host doesn't support passthrough of host PCI devices Actual results: unsupported configuration: host doesn't support passthrough of host PCI devices Expected results: guest OS starts,and we will see the NIC Additional info:
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Created attachment 1151242 [details] kernel start log
Created attachment 1151244 [details] when add NIC to a guest,the Dmesg log
Hi, could you please provide version of libvirt, qemu and kernel and also output of "virt-host-validate" command? Thanks.
Hi : Finally i got the infomation，see below： [root@localhost ~]# libvirtd --version libvirtd (libvirt) 1.2.17 [root@localhost ~]# virsh --version 1.2.17 [root@localhost ~]# qemu-img --help | grep version qemu-img version 1.5.3, Copyright (c) 2004-2008 Fabrice Bellard conversion. If the number of bytes is 0, the source will not be scanned for [root@localhost ~]# /usr/libexec/qemu-kvm -version QEMU emulator version 1.5.3 (qemu-kvm-1.5.3-105.el7), Copyright (c) 2003-2008 Fabrice Bellard [root@localhost ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 7.2 (Maipo) [root@localhost ~]# cat /proc/version Linux version 3.10.0-327.el7.x86_64 (mockbuild.eng.bos.redhat.com) (gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC) ) #1 SMP Thu Oct 29 17:29:29 EDT 2015 [root@localhost ~]# uname -a Linux localhost.localdomain 3.10.0-327.el7.x86_64 #1 SMP Thu Oct 29 17:29:29 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux [root@localhost ~]# virt-host-validate QEMU: Checking for hardware virtualization : PASS QEMU: Checking for device /dev/kvm : PASS QEMU: Checking for device /dev/vhost-net : PASS QEMU: Checking for device /dev/net/tun : PASS LXC: Checking for Linux >= 2.6.26 : PASS [root@localhost ~]#
Hi: Do you still need any more info?
Hi, I didn't realized that RHEL-7.2 doesn't have all the checks in virt-host-validate as upstream libvirt. Are you sure, that the IOMMU in bios is enabled and also the intel_iommu=on is on the command line? Please check again, that the vt-d is enabled in bios and the intel_iommu=on is properly passed to the kernel. If everything works, you should be able to see several iommu groups inside /sys/kernel/iommu_groups/ directory. I've tried it and everything works.
Hi: After checking with our customer, Now they can assign BCM5719 NIC to VM now; They said they have made some error settings in bios and kernel before; thanks for helping;