On 05/17/2018 10:27 AM, Alex Williamson wrote: > On Thu, 17 May 2018 12:56:49 +0800 > Eddie Yen <missile0...@gmail.com> wrote: > >> Hi everyone, >> >> IME, you can set VID:PID by adding "options vfio-pci" into conf file and >> put at modprobe.d >> So that VFIO can take over the device that had same VID:PID when boot. >> >> But how can I set this option by using PCI Address without using override >> script? > There's no such module option, what's wrong with a script? Part of the > reason we don't have such a module option is that PCI addresses are not > persistent, they can change based on devices added or removed, or even > motherboard BIOS updates. Userspace has more flexibility for managing > this and is fully able to do so via initrd scripts and modprobe.d. > Thanks, > > Alex
That's a good point. However, I had an environment where I needed to pass through one of two devices with the same PCI IDs. I accomplished it with an install command in my modprobe config. I can probably make this look at other factors before overriding the driver, but the following config might work well enough if the PCI IDs don't change: # For each PCI device listed in the for-loop, override their assigned driver # to vfio-pci, for usage with PCI-passthrough. # # Please make sure to include vfio-pci in the initrd, or some other modules # will likely claim the devices first. This can be done on systems that use # initramfs-tools by adding "vfio-pci" to /etc/initramfs-tools/modules install vfio-pci for dev in 0000:03:00.0 0000:03:00.1; do echo vfio-pci > "/sys/bus/pci/devices/$dev/driver_override"; done; /sbin/modprobe --ignore-install vfio-pci $CMDLINE_OPTS # Load vfio-pci before some other drivers so they don't claim devices first. # The pre-drm line should handle all graphics drivers. softdep snd_hda_intel pre: vfio-pci softdep drm pre: vfio-pci This worked well for me in dracut and initramfs-tools initrds with the vfio-pci module included. _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
