Any way to get resizeable bar to work with a GPU passtrough VM?

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  • edk2

    EDK II

  • Because of the above, your ovmf bios doesn't need to support anything, except you need to change the 64-bit MMIO aperture if your GPU >16GB since it alone will take up the entire 32GB default allocation. Support to adjust the mmio aperture was added to 2016.

  • linux

    Linux kernel source tree

  • The only thing kernel >= 6.1 allows is to *manually* manipulate bar sizes. It allows you to set the bar size before passing through to the guest, the guest has no control over the bar size. If your setup magically allows the guest to resize bars it has nothing to do with this patch.

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