arm64: cpufeature: Add an early command-line cpufeature override facility

Browse source

In order to be able to override CPU features at boot time,
let's add a command line parser that matches options of the
form "cpureg.feature=value", and store the corresponding
value into the override val/mask pair.

No features are currently defined, so no expected change in
functionality.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: David Brazdil <dbrazdil@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210208095732.3267263-14-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

...

This commit is contained in:

Marc Zyngier 2021-02-08 09:57:22 +00:00 • committed by Will Deacon

parent f6f0c4362f

commit 3320030355

3 changed files with 152 additions and 1 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

2

arch/arm64/kernel/Makefile

View file

1

arch/arm64/kernel/head.S

View file

150

arch/arm64/kernel/idreg-override.c

View file