arm64: Advertise CPUs capable of running 32-bit applications in sysfs

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Since 32-bit applications will be killed if they are caught trying to
execute on a 64-bit-only CPU in a mismatched system, advertise the set
of 32-bit capable CPUs to userspace in sysfs.

Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210730112443.23245-14-will@kernel.org

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Will Deacon 2021-07-30 12:24:40 +01:00 • committed by Peter Zijlstra

parent df950811f4

commit 7af33504d1

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9

Documentation/ABI/testing/sysfs-devices-system-cpu

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19

arch/arm64/kernel/cpufeature.c

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