Add settings that allow for setup for GPU passthru #574
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Passthru device backends can take options such as rom and bootindex. Accept those via passthruX_options settings.
The boot ROM device can take a type (fwcfg) to pass information to the guest firmware. Accept loader_fwcfg to pass this type. This setting is only parsed when the loader is UEFI.
bhyve can be dependent upon the order of the options is receives, so add a setting similar to bhyve_options, called bhyve_extra, that is passed to bhyve as the last options. "-s 31,lpc" is passed by vm-bhyve after the options provided by bhyve_options. However, this causes bhyve to return an error when attempting to use GPU passthru with an Intel iGPU due to additional options needing to be passed. Example: $ bhyve ... -o pci.0.31.0.pcireg.vendor=host -s 31,lpc ... pci slot 0:31:0 already occupied!
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Other possibilities outside my experience with bhyve:
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@scfarley Thanks for those changes, I just needed the |
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I need to test the changes later, but I have created a draft PR for it: freebsd/vm-bhyve#49 |
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Thank you! |
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Following the instructions from GPU passthrough with bhyve - Corvin Köhne - EuroBSDcon 2023, a few additional settings are needed to pass the proper values and in the correct order:
passthruX_options: Options given to the passthru device to specifyromand/orbootindex.loader_fwcfg: Assigns a type (bhyveorqemu) on what and how information is passed to the guest firmware.bhyve_extra: Options that are passed to bhyve at the end of the command-line.