Re: [PATCH v2 03/14] arm64, hibernate: add trans_table public functions

From: Pavel Tatashin
Date: Mon Aug 19 2019 - 12:33:48 EST

On Mon, Aug 19, 2019 at 11:58 AM Mark Rutland <mark.rutland@xxxxxxx> wrote:
> On Fri, Aug 16, 2019 at 10:46:18PM -0400, Pavel Tatashin wrote:
> > trans_table_create_copy() and trans_table_map_page() are going to be
> > the basis for public interface of new subsystem that handles page
> > tables for cases which are between kernels: kexec, and hibernate.
> While the architecture uses the term 'translation table', in the kernel
> we generally use 'pgdir' or 'pgd' to refer to the tables, so please keep
> to that naming scheme.

The idea is to have a unique name space for new subsystem of page
tables that are used between kernels:
between stage 1 and stage 2 kexec kernel, and similarly between
kernels during hibernate boot process.

I picked: "trans_table" that stands for transitional page table:
meaning they are used only during transition between worlds.

All public functions in this subsystem will have trans_table_* prefix,
and page directory will be named: "trans_table". If this is confusing,
I can either use a different prefix, or describe what "trans_table"
stand for in trans_table.h/.c

Thank you,