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[src/trunk]: src/sys/arch/x86/x86 Add a comment explaining an important rule....
details: https://anonhg.NetBSD.org/src/rev/4c39dc17bd4c
branches: trunk
changeset: 836918:4c39dc17bd4c
user: maxv <maxv%NetBSD.org@localhost>
date: Mon Nov 12 18:10:36 2018 +0000
description:
Add a comment explaining an important rule. Just to better highlight that
this rule is actually not respected.
diffstat:
sys/arch/x86/x86/cpu.c | 13 +++++++++++--
1 files changed, 11 insertions(+), 2 deletions(-)
diffs (41 lines):
diff -r e3b87682a905 -r 4c39dc17bd4c sys/arch/x86/x86/cpu.c
--- a/sys/arch/x86/x86/cpu.c Mon Nov 12 17:46:53 2018 +0000
+++ b/sys/arch/x86/x86/cpu.c Mon Nov 12 18:10:36 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu.c,v 1.161 2018/09/03 16:29:29 riastradh Exp $ */
+/* $NetBSD: cpu.c,v 1.162 2018/11/12 18:10:36 maxv Exp $ */
/*
* Copyright (c) 2000-2012 NetBSD Foundation, Inc.
@@ -62,7 +62,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.161 2018/09/03 16:29:29 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.162 2018/11/12 18:10:36 maxv Exp $");
#include "opt_ddb.h"
#include "opt_mpbios.h" /* for MPDEBUG */
@@ -846,6 +846,13 @@
struct pcb *pcb;
int s, i;
+ /* ------------------------------------------------------------- */
+
+ /*
+ * This section of code must be compiled with SSP disabled, to
+ * prevent a race against cpu0. See sys/conf/ssp.mk.
+ */
+
cpu_init_msrs(ci, true);
cpu_probe(ci);
cpu_speculation_init(ci);
@@ -863,6 +870,8 @@
atomic_or_32(&ci->ci_flags, CPUF_PRESENT);
tsc_sync_ap(ci);
+ /* ------------------------------------------------------------- */
+
/*
* Wait to be brought online.
*
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