Some Question about ioctl in cve-2025-30712

I have some question about [cve-2025-30712 exp](https://github.com/google/security-research/tree/master/pocs/oracle/virtualbox/cve-2025-30712/exploit)

I'm trying to reproduce this vulnerability, but an error occurred in main->setup_transfer_buffer->alloc_transfer_buffer->ioctl(fd, VGAPWN_COPY, ©_args), with the ioctl error code being 3(ENOTTY). It indicates that the device file does not support the specified ioctl opcode, and no implementation related to VGAPWN_ALLOC was found in the kernel.patch file. May I ask if it is still necessary to implement the processing functions of ioctl related to VGAPWN_ALLOC, VGAPWN_COPY, etc. in the kernel module?