NVIDIA / k8s-driver-manager / 19655564782

Pull #128

github

Update vfio-manage to choose best VFIO driver when binding devices

Rather than always binding GPUs to the vfio-pci driver, this commit
introduces logic to see if the running kernel has a VFIO variant
driver available that is a better match for the device. This is required
on Grace-based systems where the nvgrace_gpu_vfio_pci module is required
to be used in favor of the vfio-pci module.

We read the mod.alias file for a given device, then we look through
/lib/modules/${kernel_version}/modules.alias for the vfio_pci alias
that matches with the least number of wildcard ('*') fields.

The code introduced in this commit is inspired by:

https://gitlab.com/libvirt/libvirt/-/commit/82e2fac29

Signed-off-by: Christopher Desiniotis <cdesiniotis@nvidia.com>

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