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.
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/884401 Title: PCI Passthrough for Digium TCE400P Codec Card Not working Status in QEMU: New Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/884401/+subscriptions