Re: [PATCH v7 38/41] x86/fpu: Add helper for initing features

On Mon, 2023-03-13 at 18:10 +0100, Borislav Petkov wrote:

quoted

This means that CET_U will always have at least the CET_SHSTK_EN
bit
set and so not be in the init state. So this can probably just warn
and bail if it sees an init state.

I don't mind the additional checks as this is a security thing so
sanity checks are good, especially if they're cheap.

And you don't need to reinit the buffer - just scream loudly when
get_xsave_addr()
returns NULL.

Ok, will do this instead in "x86: Add PTRACE interface for shadow
stack".