PCI Passthrough for Digium TCE400P Codec Card Not working

[Ray Seals]

trying to use a Digium TCE400P Codec card on a Virtual instance using the following information:

lspci <enter>

02:08.0 Ethernet controller: Digium, Inc. Wildcard TCE400P transcoder base card (rev 11)

lspci -n <enter>

02:08.0 0200: d161:8004 (rev 11)

virsh nodedev-list | grep pci

pci_0000_02_08_0

printf %x 02
2

printf %x 08
8

printf %x 0
0

bus='0x02'
slot='0x08'
function='0x0'

# virsh edit vmanager
<hostdev mode='subsystem' type='pci' managed='yes'>
  <source>
      <address domain='0x0000' bus='0x02' slot='0x08' function='0x0'/>
  </source>
</hostdev>

I have SELINUX disabled at this time.

virsh start vmanager I get the following error message:

[root@twins qemu]# virsh start vmanager
error: Failed to start domain vmanager
error: internal error Process exited while reading console log output: char device redirected to /dev/pts/2
Unable to assign device: PCI region 1 at address 0xdf1fe000 has size 0x400, which is not a multiple of 4K
qemu-kvm: -device pci-assign,host=02:08.0,id=hostdev0,configfd=23,bus=pci.0,addr=0x6: Device 'pci-assign' could not be initialized

Version Numbers:

[root@twins qemu]# yum list | grep qemu
gpxe-roms-qemu.noarch 0.9.7-6.3.el6_0.1 @updates
qemu-img.x86_64 2:0.12.1.2-2.113.el6_0.8 @updates
qemu-kvm.x86_64 2:0.12.1.2-2.113.el6_0.8 @updates
qemu-kvm-tools.x86_64 2:0.12.1.2-2.113.el6_0.8 updates

[Ray Seals (rayseals)]

Here is what my grub.conf looks like (see the addition of the intel_iommu=on:

title CentOS Linux (2.6.32-71.29.1.el6.x86_64)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-71.29.1.el6.x86_64 ro root=/dev/mapper/vg_twins-lv_root rd_LVM_LV=vg_twins/lv_root rd_LVM_LV=vg_twins/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=128M rhgb quiet intel_iommu=on
        initrd /initramfs-2.6.32-71.29.1.el6.x86_64.img

[Alex Williamson (alex-l-williamson)]

This is a distro bug, not an upstream bug. The error message indicates the version of qemu-kvm you're using doesn't support sub-4k MMIO BARs. This has already been fixed in RHEL6.1.

[Thomas Huth (th-huth)]

According to the comment to Alex, this should have been fixed in newer versions, so setting status to "Fix Released" now.

[Thomas Huth (th-huth)]

Oh, I meant "comment from Alex", not "comment to Alex", sorry!