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arm64: Implement HWCAP

Description

arm64: Implement HWCAP

Add HWCAP support for arm64.
defines are the same as in Linux and a userland program can use
elf_aux_info to get the data.
We only save the common denominator for all cores in case the
big and little cluster have different support (this is known to
exists even if we don't support those SoCs in FreeBSD)

Differential Revision: https://reviews.freebsd.org/D17137

Details

Committed
manuJul 20 2019, 2:29 PM
Differential Revision
D17137: arm64: Add HWCAP support
Parents
rS350165: MFC r349543
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