upstream/opnsense-src
1
0
Fork 0
mirror of https://github.com/opnsense/src.git synced 2026-06-03 22:02:58 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

amd64 pmap: Prefer consistent naming for loader tunable

Browse source 
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:		c08973d09c Workaround for Intel SKL002/SKL012S errata
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D42311

(cherry picked from commit 9e7f349ff10691c2e3fb03898dbc942794a47566)
This commit is contained in:
Zhenlei Huang 2023-10-20 15:31:44 +08:00
parent 9e48b627ae
commit 8784b153a3
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
sys/amd64/amd64/pmap.c
View file

@ -2342,7 +2342,10 @@ pmap_allow_2m_x_ept_recalculate(void)
CPUID_TO_MODEL(cpu_id) == 0x57 || /* Knights */
CPUID_TO_MODEL(cpu_id) == 0x85))))
pmap_allow_2m_x_ept = 1;
#ifndef BURN_BRIDGES
TUNABLE_INT_FETCH("hw.allow_2m_x_ept", &pmap_allow_2m_x_ept);
#endif
TUNABLE_INT_FETCH("vm.pmap.allow_2m_x_ept", &pmap_allow_2m_x_ept);
}
static bool