amd64: disable LA57 by default for now

(cherry picked from commit 72a42ec) (cherry picked from commit df6241f) Approved by: so Security: FreeBSD-EN-22:07.la57
freebsd · Feb 1, 2022 · f151464 · f151464
1 parent b0c8bc5
commit f151464
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
@@ -2015,8 +2015,7 @@ 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;