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riscv: MMU detection

Description

riscv: MMU detection

Detect and report the supported MMU for each CPU. Export the
capabilities to the rest of the kernel and use it in pmap_bootstrap() to
check for Sv48 support.

Reviewed by: markj
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D39814

Details

Provenance
mhorneAuthored on May 22 2023, 11:53 PM
Reviewer
markj
Differential Revision
D39814: riscv: rework CPU identification [6/6]
Parents
rG78a3420c20e0: riscv: Print ISA extensions
Branches
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