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3f24b50567
Summary: The point of this addition is to cache CPU behavior 'features', to avoid having to recompute based on CPU, etc. The first such use case is to avoid the unnecessary manipulation of the SLBs (Segment Lookaside Buffers) when using the Radix pmap on POWER9. Since we already get the PCPU pointer wherever we swap the SLB entries, we can use a cached flag to check if it's necessary to perform the operation anyway, and skip it when not. Reviewed by: bdragon Differential Revision: https://reviews.freebsd.org/D24908 |
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