Alex Williamson wrote: > On Mon, 2012-08-13 at 08:27 -0500, Anthony Liguori wrote: >> Alex Williamson <alex.william...@redhat.com> writes: >> >>> VFIO kernel support was just merged into Linux, so I'd like to >>> formally propose inclusion of the QEMU vfio-pci driver for >>> QEMU 1.2. Included here is support for x86 PCI device assignment. >>> PCI INTx is not yet enabled, but devices making use of either MSI >>> or MSI-X work. The level irqfd and eoifd support I've proposed >>> for KVM enable an accelerated patch for this through KVM. I'd >>> like to get this base driver in first and enable the remaining >>> support in-tree. >>> >>> I've split this version up a little from the RFC to make it a bit >>> easier to review. Review comments from Blue Swirl and Avi are >>> already incorporated, including Avi's requests to simplify both >>> the PCI BAR mapping and unmapping paths. >> >> Hi Alex, >> >> Thanks for pushing this forward! Hopefully this will finally kill >> off qemu-kvm.git for good. >> >> I think this series is going to have to wait for 1.3 to open up. We >> have a very short release window for this release and I'd feel a lot >> more comfortable having such a significant feature spend some time in >> the development cycle getting testing/review. >> >> I'd like to see a few Reviewed-by's too for this series before it >> goes in. I expect they won't be hard to get but I also expect it >> will take a few more revisions of this series to get there. > > That's disappointing, but I can understand your reluctance. Blue > Swirl reviewed the RFC and could perhaps add a Reviewed-by. Alexey > has been working on the POWER port and I'm sure could provide a > Reviewed-by. We also have a few early adopters that are already > making use of this code.
I'm running qemu with vfio patch since Jun 05, 2012 (awilliam-qemu-vfio-v0.14.0-rc0-6402-g323cf9f.tar.gz). I didn't encounter any problem so far. If you like, I could compile a more actual version, too (if there have been any changes). To see more about my use case: http://permalink.gmane.org/gmane.linux.drivers.rt2x00.user/1051 You may add a Tested-by Andreas Hartmann <andihartm...@01019freenet.de> if you like. Unfortunately, I'm only running the vfio VM (kvm) with this version of qemu, but I'm running parallel 4 other VM's with the unchanged version of qemu (kvm-0.15.0-123.2.x86_64), too. One of these 4 VM's uses PCIe passthrough. I now tried to run all VMs with the new version of qemu. At this point, I unfortunately run into a problem with the VM which passes through a PCIe device. The error message is (during start of VM): virsh start VM error: Failed to start domain VM error: internal error process exited while connecting to monitor: qemu-system-x86_64: -device pci-assign,host=04:00.0,id=hostdev0,bus=pci.0,addr=0x6: Parameter 'driver' expects device type The xml file for libvirt looks like this: <domain type='kvm'> <name>VM</name> <uuid>44444444-4444-2222-7777-111111111111</uuid> <memory>1048576</memory> <currentMemory>262144</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/local/bin/qemu-system-x86_64</emulator> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x04' slot='0x00' function='0x0'/> </source> </hostdev> <disk type='file' device='disk'> <source file='/hds/vm.qed' type='aio'/> <target dev='vda' bus='virtio'/> <driver name='qemu' type='qed' cache='none'/> </disk> <input type='mouse' bus='ps2'/> <graphics type='vnc' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> </video> </devices> </domain> Maybe, this is fixed in a newer version of qemu for vfio? Thanks, kind regards, Andreas Hartmann
