Derive zerocopy::{AsBytes, FromBytes} for all structs

[smmalis37]

It would be very helpful, and allow us to reduce the amount of unsafe code we have, if more structs could derive AsBytes and FromBytes, specifically those in https://github.com/rust-vmm/mshv/blob/main/mshv-bindings/src/bindings.rs and https://github.com/rust-vmm/mshv/blob/main/mshv-bindings/src/regs.rs.

[liuw]

CC @russell-islam

[liuw]

@smmalis37 I've gone through regs.rs and added those where I can. However bindings.rs is generated by bindgen. I'm a bit hesitant to modify it by hand and only to be overwritten later.

[liuw]

This looks interesting rust-lang/rust-bindgen#2059 but there is no CLI option exposed in bindgen.

[smmalis37]

There's also rust-lang/rust-bindgen#2168

[russell-islam]

For generating bindings we need to have the support to derive these fields. We can not manually do it every time.

[liuw]

It looks like the issue on bindgen's side is progressing. I'm going to leave this issue open for now.