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amd64: disable LA57 by default for now

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A testing on the real hardware uncovered an issue, and since I do not have
access to the machine, disable until the bug can be fixed.

Reported by:	"Pieper, Jeffrey E" <jeffrey.e.pieper@intel.com>
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
This commit is contained in:
Konstantin Belousov 2021-04-28 18:50:16 +03:00
parent 21fc6a2a10
commit 72a42ec63b
1 changed files with 1 additions and 2 deletions
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3
sys/amd64/amd64/pmap.c
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@ -2080,8 +2080,7 @@ pmap_bootstrap_la57(void *arg __unused)
if ((cpu_stdext_feature2 & CPUID_STDEXT2_LA57) == 0)
return;
if (!TUNABLE_INT_FETCH("vm.pmap.la57", &la57))
la57 = 1;
TUNABLE_INT_FETCH("vm.pmap.la57", &la57);
if (!la57)
return;