Module Name: src
Committed By: nonaka
Date: Sat Jul 8 14:35:33 UTC 2017
Modified Files:
src/sys/arch/x86/x86: lapic.c
Log Message:
PR/52266: use rdmsr_safe(9) instead of rdmsr(9) for old machine.
tested by simonb@
To generate a diff of this commit:
cvs rdiff -u -r1.58 -r1.59 src/sys/arch/x86/x86/lapic.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/x86/x86/lapic.c
diff -u src/sys/arch/x86/x86/lapic.c:1.58 src/sys/arch/x86/x86/lapic.c:1.59
--- src/sys/arch/x86/x86/lapic.c:1.58 Tue May 23 08:54:39 2017
+++ src/sys/arch/x86/x86/lapic.c Sat Jul 8 14:35:33 2017
@@ -1,4 +1,4 @@
-/* $NetBSD: lapic.c,v 1.58 2017/05/23 08:54:39 nonaka Exp $ */
+/* $NetBSD: lapic.c,v 1.59 2017/07/08 14:35:33 nonaka Exp $ */
/*-
* Copyright (c) 2000, 2008 The NetBSD Foundation, Inc.
@@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: lapic.c,v 1.58 2017/05/23 08:54:39 nonaka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: lapic.c,v 1.59 2017/07/08 14:35:33 nonaka Exp $");
#include "acpica.h"
#include "ioapic.h"
@@ -235,10 +235,12 @@ lapic_enable_x2apic(void)
bool
lapic_is_x2apic(void)
{
- uint64_t r;
+ uint64_t msr;
- r = rdmsr(MSR_APICBASE);
- return (r & (APICBASE_EN | APICBASE_EXTD)) == (APICBASE_EN | APICBASE_EXTD);
+ if (rdmsr_safe(MSR_APICBASE, &msr) == EFAULT)
+ return false;
+ return (msr & (APICBASE_EN | APICBASE_EXTD)) ==
+ (APICBASE_EN | APICBASE_EXTD);
}
/*
