K 10
svn:author
V 4
zlei
K 8
svn:date
V 27
2023-10-24T04:48:17.188981Z
K 7
svn:log
V 939
amd64 pmap: Prefer consistent naming for loader tunable

The sysctl knob 'vm.pmap.allow_2m_x_ept' is loader tunable and have
public document entry in security(7) but is fetched from kernel
environment 'hw.allow_2m_x_ept'. That is inconsistent and obscure.

As there is public security advisory FreeBSD-SA-19:25.mcepsc [1],
people may refer to it and use 'hw.allow_2m_x_ept', let's keep old
name for compatibility.

[1] https://www.freebsd.org/security/advisories/FreeBSD-SA-19:25.mcepsc.asc

Reviewed by:	kib
Fixes:		c08973d09c95 Workaround for Intel SKL002/SKL012S errata
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D42311

(cherry picked from commit 9e7f349ff10691c2e3fb03898dbc942794a47566)
(cherry picked from commit 8784b153a31fc0b3a12449a2f0377eb038e6fb7b)
(cherry picked from commit 350e79edf9a8f65c9a9d17aa86ec90b436d638f8)

Git Hash:   180695b8e6434891c418cfdde9a32eee8c8fb6f0
Git Author: zlei@FreeBSD.org
END