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

[Shivaprasad bhat]

On Wed, Jan 14, 2015 at 10:34 PM, Michal Privoznik <mprivozn at redhat.com> wrote:
> 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.

Thanks for fixing and pushing Michal.. Not sure how I missed it. I'll
be cautious using make check in future.

Regards,
Shiva

>
> Michal