I&#39;m looking for assistance with pci-passthrough on CentOS 6.2.<div>I&#39;ve installed libvirt version: 0.9.4, package: 23.el6_2.8 from yum.</div><div><br></div><div>I have a windows XP client setup via virt-manager which boots and runs fine until I attempt to assign a PCI device to it.</div>
<div>The error log reads:</div><div>-----------------/var/log/libvirt/qemu/SageTv.log----------------</div><div><div>2012-06-02 22:55:07.801: starting up</div><div>LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=spice /usr/libexec/qemu-kvm -S -M rhel6.2.0 -cpu Opteron_G3,+wdt,+skinit,+osvw,+3dnowprefetch,+cr8legacy,+extapic,+cmp_legacy,+pdpe1gb,+fxsr_opt,+mmxext,+aes,+sse4.2,+sse4.1,+ssse3,+ht,+vme -enable-kvm -m 3048 -smp 2,sockets=2,cores=1,threads=1 -name SageTv -uuid bf80f6a5-1471-9415-e502-88c4999319c7 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/SageTv.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -no-shutdown -boot order=c,menu=on -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/dev/vg_hdd/lv_sagetv,if=none,id=drive-virtio-disk0,format=raw,cache=none,aio=native -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:b9:bf:b0,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -usb -device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable-ticketing -vga std -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device pci-assign,host=04:07.0,id=hostdev0,configfd=26,bus=pci.0,addr=0x8 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7</div>
<div>char device redirected to /dev/pts/1</div><div>do_spice_init: starting 0.8.3</div><div>spice_server_add_interface: SPICE_INTERFACE_MIGRATION</div><div>spice_server_add_interface: SPICE_INTERFACE_KEYBOARD</div><div>spice_server_add_interface: SPICE_INTERFACE_MOUSE</div>
<div>spice_server_add_interface: SPICE_INTERFACE_PLAYBACK</div><div>spice_server_add_interface: SPICE_INTERFACE_RECORD</div><div>Failed to assign device &quot;hostdev0&quot; : Invalid argument</div><div>qemu-kvm: -device pci-assign,host=04:07.0,id=hostdev0,configfd=26,bus=pci.0,addr=0x8: Device &#39;pci-assign&#39; could not be initialized</div>
<div>2012-06-02 22:55:08.744: shutting down</div></div><div>-----------------/var/log/libvirt/qemu/SageTv.log----------------
</div><div><br></div><div>After this I find the dmesg shows:</div><div>-----------------dmesg------------------</div><div><div>pci-stub 0000:04:07.0: PCI INT A -&gt; GSI 21 (level, low) -&gt; IRQ 21</div><div>pci-stub 0000:04:07.0: restoring config space at offset 0x1 (was 0x2100000, writing 0x2100002)</div>
<div>assign device 4:7.0 failed</div></div><div>-----------------dmesg------------------
</div><div><br></div><div>In case this was an IRQ problem I checked my /proc/interrupts.</div><div>-----------------interrupts------------------
</div><div><div>           CPU0       CPU1       CPU2       CPU3       CPU4       CPU5       CPU6       CPU7       </div><div>  0:        130          0          0          0          0          0          0          0   IO-APIC-edge      timer</div>
<div>  1:          0          0          1          1          0          0          0          0   IO-APIC-edge      i8042</div><div>  8:          0          1          0          0          0          0          0          0   IO-APIC-edge      rtc0</div>
<div>  9:          0          0          0          0          0          0          0          0   IO-APIC-fasteoi   acpi</div><div> 17:          0          0          0          0          0          0          0          0   IO-APIC-fasteoi   ehci_hcd:usb1, ehci_hcd:usb2, ehci_hcd:usb3</div>
<div> 18:          0          0          0          0          0          0          0          0   IO-APIC-fasteoi   ohci_hcd:usb4, ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7</div><div> 19:        587       2219       1807        588        602        600        687        607   IO-APIC-fasteoi   ahci</div>
<div> 21:        422        430       7316        402        410        405        429        412   IO-APIC-fasteoi </div><div> 24:          0          0          0          0          0          0          0          0   PCI-MSI-edge      AMD-Vi</div>
<div> 25:         12         10          9         20         11         15         15         15   PCI-MSI-edge      radeon</div><div> 26:          7          8          7         10          9          8         10          9   PCI-MSI-edge      hda_intel</div>
<div> 27:          0          0          0          0          0          0          0          0   PCI-MSI-edge      xhci_hcd</div><div> 28:       7098      36221         19         24         19         20         28         20   PCI-MSI-edge      eth0</div>
<div>NMI:          0          0          0          0          0          0          0          0   Non-maskable interrupts</div><div>LOC:      22088      22355       9472      12483       6371      11086       5211       7987   Local timer interrupts</div>
<div>SPU:          0          0          0          0          0          0          0          0   Spurious interrupts</div><div>PMI:          0          0          0          0          0          0          0          0   Performance monitoring interrupts</div>
<div>PND:          0          0          0          0          0          0          0          0   Performance pending work</div><div>RES:      61166      42503       6683      11920       2681       3534       4120       2460   Rescheduling interrupts</div>
<div>CAL:        197        302        301        303        290        300        314        318   Function call interrupts</div><div>TLB:       1406       1551        464       1749        350        897        485        563   TLB shootdowns</div>
<div>TRM:          0          0          0          0          0          0          0          0   Thermal event interrupts</div><div>THR:          0          0          0          0          0          0          0          0   Threshold APIC interrupts</div>
<div>MCE:          0          0          0          0          0          0          0          0   Machine check exceptions</div><div>MCP:          1          1          1          1          1          1          1          1   Machine check polls</div>
<div>ERR:          0</div><div>MIS:          0</div></div><div>-----------------interrupts------------------
</div><div><br></div><div>To get to this point I&#39;ve confirmed IOMMU is loading on boot.  during boot a grep for AMD-Vi returns:</div><div>-----------------AMD-Vi------------------
</div><div><div>AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40</div><div>AMD-Vi: Initialized for Passthrough Mode</div><div>AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40</div></div><div>-----------------AMD-Vi------------------
</div><div><br></div><div>I&#39;ve set: allow_unsafe_assigned_interrupts.</div><div>I&#39;ve set selinux to permissive</div><div>I&#39;ve set user and group for qemu to &#39;root&#39;</div><div>I&#39;ve set clear_emulator_capabilites = 0</div>
<div>I&#39;ve set relaxed_acs_check = 1</div><div><br></div><div>Finally, if there&#39;s a better forum to ask this question in please let me know.  I&#39;ve already tried #kvm and #virt on IRC with no reply yet.  I&#39;ve tried the CentOS 6.2 forums with no reply.</div>
<div><br></div><div>Thanks,</div><div>Chris</div><div><br></div><div>P.S. I didn&#39;t subscribe, just sent this email.  If by some odd chance, I can&#39;t see replies w/o subscribing someone please let me know.</div><div>
(<a href="mailto:sanders.chris@gmail.com">sanders.chris@gmail.com</a>)</div>