Hi Thanks for the reply. I think the links that you provided show how to deal with pci devices in case the hypervisor is kvm. Please correct me if I am wrong. But I am using LXC containers.I have skimmed through the libvirt lxc driver code and found no functionality of allowing specified devices into a container exists other than currently where only hard coded devices are allowed which can be seen in the file lxc_controller.c struct cgroup_device_policy devices[] = { {'c', LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_NULL}, {'c', LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_ZERO}, {'c', LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_FULL}, {'c', LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_RANDOM}, {'c', LXC_DEV_MAJ_MEMORY, LXC_DEV_MIN_URANDOM}, {'c', LXC_DEV_MAJ_TTY, LXC_DEV_MIN_TTY}, {'c', LXC_DEV_MAJ_TTY, LXC_DEV_MIN_PTMX}, {0, 0, 0}}; Please confirm this or let me know if there is any other interface libvirt_lxc provides to allow specific pci/other devices into container. Thanks in advance Regards Devendra ----- Original Message ----- From: "Alex Jia" <ajia@redhat.com> To: "Devendra K. Modium" <dmodium@isi.edu> Sent: Thursday, July 28, 2011 3:22:36 AM Subject: Re: [libvirt] PCI devices passthough to LXC containers using libvirt On 07/28/2011 05:13 AM, Devendra K. Modium wrote:

Hi All

Please let me know if anyone have given access to PCI devices for a LXC container.

I have tried getting the xml from "virsh nodedev-dumpxml pci_device" and added to the libvirt xml file as shown below

<device> <name>pci_0000_03_00_0</name> <parent>pci_0000_00_03_0</parent> <driver> <name>nvidia</name> </driver> <capability type='pci'> <domain>0</domain> <bus>3</bus> <slot>0</slot> <function>0</function> <product id='0x06fd' /> <vendor id='0x10de'>nVidia Corporation</vendor> </capability> </device> You shouldn't directly add the above xml to guest xml configuration, here is a usage, it should be helpful for you:

http://libvirt.org/formatdomain.html#elementsUSB http://fedoraproject.org/wiki/Category:Virtualization_KVM_PCI_Device_Assignm... Good Luck! Alex

But it didn't work. I see the logs and it says couldn't get physical and virtual functions of these devices with error

get_physical_function_linux:323 : Attempting to get SR IOV physical function for device with sysfs path '/sys/devices/pci0000:00/0000:00:00.0' 16:48:34.033: 13802: debug : get_sriov_function:270 : Attempting to resolve device path from device link '/sys/devices/pci0000:00/0000:00:00.0/physfn' 16:48:34.033: 13802: debug : get_sriov_function:274 : SR IOV function link '/sys/devices/pci0000:00/0000:00:00.0/physfn' does not exist 16:48:34.033: 13802: debug : get_virtual_functions_linux:348 : Attempting to get SR IOV virtual functions for devicewith sysfs path '/sys/devices/pci0000:00/0000:00:00.0'

If anyone got some guidelines how to debug, please let me know.

Thanks in advance

Regards Devendra

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