x86/boot/64: Use RIP_REL_REF() to access early_top_pgt[]

Browse source

early_top_pgt[] is assigned from code that executes from a 1:1 mapping
so it cannot use a plain access from C. Replace the use of
fixup_pointer() with RIP_REL_REF(), which is better and simpler.

For legibility and to align with the code that populates the lower page
table levels, statically initialize the root level page table with an
entry pointing to level3_kernel_pgt[], and overwrite it when needed to
enable 5-level paging.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20240221113506.2565718-24-ardb+git@google.com

...

This commit is contained in:

Ard Biesheuvel 2024-02-21 12:35:13 +01:00 • committed by Ingo Molnar

parent eb54c2ae4a

commit 533568e06b

2 changed files with 11 additions and 13 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

21

arch/x86/kernel/head64.c

View file

3

arch/x86/kernel/head_64.S

View file