Add Fabric Manager Shared NVSwitch virtualization model support #538
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The changes include:
- add the `FABRIC_MANAGER_FABRIC_MODE` env var that configures FM with
either full-passthrough (0) or shared-nvswitch (1) mode. It defaults
to 0.
- when fabric manager mode is set to 0 no changes to the flow, i.e.
execute the fabric manager daemon with its default configuration.
- when fabric manager mode is set to 1:
- edit the fabric manager configuration file and set `FABRIC_MODE=1`.
- persist mapping of physical GPU module IDs to their PCIe address by
creating a JSON file on disk (the physical GPU module IDs are
available through nvidia-smi).
- blacklist GPU devices from the NVIDIA driver.
- disable `nvidia-persistenced`, as the GPU devices are now
blacklisted from the NVIDIA driver and bound to VFIO.
Signed-off-by: Michail Resvanis <mresvani@redhat.com>
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This PR adds Fabric Manager (FM) Shared NVSwitch virtualization model support when NVSwitch devices are detected and the newly introduced
FABRIC_MANAGER_FABRIC_MODEenv var is set to1(shared-nvswitch).No changes introduced when
FABRIC_MANAGER_FABRIC_MODE=0(default FM mode - full-passthrough), which is the current flow when NVSwitch devices are detected.Changes
FABRIC_MANAGER_FABRIC_MODEto control fabric managerFABRIC_MODE(defaults to0forfull-passthrough,1forshared-nvswitch).FABRIC_MODEis set to Shared NVSwitch.vfio-pci.nvidia-persistencedsince GPU devices are blacklisted from the NVIDIA driver.Flow when
FABRIC_MANAGER_FABRIC_MODE=1(shared-nvswitch)nvidia-smi.driver_override.vfio-pcifor passthrough scenarios.nvidia-persistencedstartup since GPU devices are no longer managed by the NVIDIA driver.