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| author | Marc Zyngier <maz@kernel.org> | 2021-02-08 12:57:22 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-02-09 16:50:52 +0300 |
| commit | 33200303553d3d74e7b980493cf363da545f887d (patch) | |
| tree | 8055844cfb71525bb886e4d60e4a48bdc43c681a /arch/arm64/kernel/head.S | |
| parent | f6f0c4362f070cab4a0cec432e82428d702ce0a6 (diff) | |
| download | linux-33200303553d3d74e7b980493cf363da545f887d.tar.xz | |
arm64: cpufeature: Add an early command-line cpufeature override facility
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>
Diffstat (limited to 'arch/arm64/kernel/head.S')
| -rw-r--r-- | arch/arm64/kernel/head.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 070d1c6ec9eb..e7f12bf49730 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -438,6 +438,7 @@ SYM_FUNC_START_LOCAL(__primary_switched) #endif mov x0, x21 // pass FDT address in x0 bl early_fdt_map // Try mapping the FDT early + bl init_feature_override // Parse cpu feature overrides #ifdef CONFIG_RANDOMIZE_BASE tst x23, ~(MIN_KIMG_ALIGN - 1) // already running randomized? b.ne 0f |