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Add a sysctl to dump kernel mappings and their properties on amd64.

Description

Add a sysctl to dump kernel mappings and their properties on amd64.

The sysctl is called vm.pmap.kernel_maps. It dumps address ranges
and their corresponding protection and mapping mode, as well as
counts of 2MB and 1GB pages in the range.

Reviewed by: kib
MFC after: 2 weeks
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D21380

Details

Provenance
markjAuthored on Sep 2 2019, 9:57 PM
Parents
rG87044fca73fe: Replace PMAP_LARGEMAP_MAX_ADDRESS() with a more general predicate.
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