Re: [PATCH v2 23/39] x86: Introduce userspace API for CET enabling

[Florian Weimer]

* Rick Edgecombe:

> +	/* Only support enabling/disabling one feature at a time. */
> +	if (hweight_long(features) > 1)
> +		return -EINVAL;

This means we'll soon need three extra system calls for x86-64 process
start: SHSTK, IBT, and switching off vsyscall emulation.  (The latter
does not need any special CPU support.)

Maybe we can do something else instead to make the strace output a
little bit cleaner?

Thanks,
Florian