Re: [RFC PATCH PoC 01/11] x86/linkage: Add SYM_PI_ALIAS() macro helper to emit symbol aliases

Ingo Molnar
2025-04-24T18:05:44Z

* Ard Biesheuvel <ardb+git@google.com> wrote:

> From: Ard Biesheuvel <ardb@kernel.org>
>
> Startup code that may execute from the early 1:1 mapping of memory will
> be confined into its own address space, and only be permitted to access
> ordinary kernel symbols if this is known to be safe.
>
> Introduce a macro helper PI_ALIAS() that emits a __pi_ prefixed alias
> for a symbol, which allows startup code to access it.

s/PI_ALIAS
/SYM_PI_ALIAS

What does 'PI' stand for? 'Physical memory Identity' map?

Thanks,

Ingo