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Read the arm64 ID registers earlier in the boot process.

Description

Read the arm64 ID registers earlier in the boot process.

Also move parsing the registers to just after the secondary CPUs have
started. This means the kernel register view from all CPUs is available
after the CPU SYSINITs have finished, e.g. for use by ifunc resolvers.

Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D25505

Details

Provenance
andrewAuthored on
Differential Revision
D25505: Read the arm64 ID registers earlier in the boot process
Parents
rS362836: MFC r362585:
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