But starting with the upcoming Linux v7.2, there's a new feature called USB4STREAM to use raw Thunderbolt packets as transport with minimum overhead and a super simple user interface:

https://lore.kernel.org/r/20260511102744.1867485-1-mika.west...

Release of v7.2-rc1 is predicted for Jul 5, that's when this will first be available as a tarball. Until then you have to clone from thunderbolt.git/next:

https://git.kernel.org/pub/scm/linux/kernel/git/westeri/thun...

Or alternatively linux-next:

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-n...

Press coverage:

https://www.phoronix.com/news/Intel-Linux-USB4STREAM