arm64: cpufeature: Use IDreg override in __read_sysreg_by_encoding()

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__read_sysreg_by_encoding() is used by a bunch of cpufeature helpers,
which should take the feature override into account. Let's do that.

For a good measure (and because we are likely to need to further
down the line), make this helper available to the rest of the
non-modular kernel.

Code that needs to know the *real* features of a CPU can still
use read_sysreg_s(), and find the bare, ugly truth.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: David Brazdil <dbrazdil@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210208095732.3267263-12-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

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Marc Zyngier 2021-02-08 09:57:20 +00:00 • committed by Will Deacon

parent 8f266a5d87

commit b3341ae0ef

2 changed files with 14 additions and 2 deletions

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arch/arm64/include/asm/cpufeature.h

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arch/arm64/kernel/cpufeature.c

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