[libvirt] [PATCH v2 0/3] PPC64 support for NVIDIA V100 GPU with NVLink2 passthrough

[Daniel Henrique Barboza]

This series includes Libvirt support for a new QEMU feature for
the spapr (PPC64) machine, NVIDIA V100 + P9 passthrough. Refer to
[1] for the version 3 of this feature (same version used as a reference
for this series).

v2 has a entirely different approach from the first patch [2] that
simply grants IPC_LOCK to the QEMU process:

- first patch is a cleanup to make it easier to
insert additional logic in the code

- patch 2 contains helper functions that browses the device tree
at /proc/device-tree to detect if a given VFIO PCI device
is using a NVLink2 bus

- patch 3 includes the passthroughLimit calculation for PPC64
guests that are using NVLink2 passthrough GPUs.

[1] https://patchwork.kernel.org/cover/10831413/
[2] https://www.redhat.com/archives/libvir-list/2019-February/msg00219.html

Daniel Henrique Barboza (3):
  qemu_domain: simplify non-VFIO memLockLimit calc for PPC64
  qemu_domain: NVLink2 device tree functions for PPC64
  PPC64 support for NVIDIA V100 GPU with NVLink2 passthrough

 src/qemu/qemu_domain.c | 245 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 234 insertions(+), 11 deletions(-)

-- 
2.20.1