arm64: head: avoid cache invalidation when entering with the MMU on

Browse source

If we enter with the MMU on, there is no need for explicit cache
invalidation for stores to memory, as they will be coherent with the
caches.

Let's take advantage of this, and create the ID map with the MMU still
enabled if that is how we entered, and avoid any cache invalidation
calls in that case.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20230111102236.1430401-5-ardb@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

...

This commit is contained in:

Ard Biesheuvel 2023-01-11 11:22:34 +01:00 • committed by Catalin Marinas

parent 9d7c13e5dd

commit 32b135a7fa

1 changed files with 3 additions and 2 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

5

arch/arm64/kernel/head.S

View file