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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:
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, 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;