[joestringer]

The packet-processing BPF programs are less tightly bound to Linux kernel APIs than you might think. Even in Linux, there has been motivation to make the APIs more generic to support different kernel hooks for packets, in particular XDP which doesn't operate on the standard internal packet buffer representation (skbuff).

[tptacek]

Microsoft doesn't support XDP, do they?(And you can only use XDP on Linux in certain circumstances). The clsbpf stuff is all pretty heavily tied to skbs.

Also, even in an XDP program, you're still likely to use a bunch of perf stuff, which is again pretty Linux-specific.