Re: [libvirt] [PATCH v2 0/2] check IOMMU group devices usage when preparing device for vfio passthrough

On 14.01.2015 12:01, Shivaprasad G Bhat wrote: > ==================================================================== > If a device in the same iommu group is in use by a different vm, the guest boot > fails with the below error during vfio passthrough. > bash-4.2$ virsh start demo > error: Failed to start domain demo > error: internal error: process exited while connecting to monitor: > 2014-12-02T13:43:52.020136Z qemu-system-x86_64: -device vfio-pci,host=00:1c.3,id=hostdev0,bus=pci.0,addr=0x5: vfio: error opening /dev/vfio/7: Device or resource busy > > Solution: > ===================================================================== > The patch iterates through the iommu group devices and errors out cleanly > mentioning the device and the guest which is using the device. > > With Patch > bash-4.2$ virsh start demo > error: Failed to start domain demo > error: Requested operation is not valid: PCI device 0000:0d:00.0 is in use by driver QEMU, domain vm10 > > --- > > Shivaprasad G Bhat (2): > Implement virPCIDeviceGetAddress function > check IOMMU group devices usage when preparing device for vfio passthrough > > > src/util/virhostdev.c | 89 ++++++++++++++++++++++++++++++------------------- > src/util/virpci.c | 16 +++++++++ > src/util/virpci.h | 1 + > 3 files changed, 72 insertions(+), 34 deletions(-) > I've fixed issues I've raised and pushed.

Michal