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Differential D32525

amd64: Zero the PML5 PTI page when initializing a pmap
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Authored by markj on Oct 16 2021, 9:20 PM.
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alc
kib
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rGb0423d0f5eec: amd64: Zero the PML5 PTI page when initializing a pmap
Summary

The root page is not zeroed at allocation time since with 4-level tables
each entry is copied from a template. However, with 5-level tables only
a single entry is filled, so the rest need to be cleared.

Reported by: alc

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rG FreeBSD src repository
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sys/
amd64/
amd64/
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sys/amd64/amd64/pmap.c

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