Problem:
====================================================================
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):
Move struct _virPCIDevice definition from virpci.c to virpci.h
check IOMMU group devices usage when preparing device for vfio passthrough
src/util/virhostdev.c | 87 +++++++++++++++++++++++++++++--------------------
src/util/virpci.c | 29 ----------------
src/util/virpci.h | 30 +++++++++++++++++
3 files changed, 82 insertions(+), 64 deletions(-)
--
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