[src/trunk]: src/sys/arch/x86/x86 Disable XSAVEOPT, until it is clear what's ...

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/66f8d5b167f7
branches:  trunk
changeset: 359435:66f8d5b167f7
user:      maxv <maxv%NetBSD.org@localhost>
date:      Fri Feb 09 18:45:55 2018 +0000

description:
Disable XSAVEOPT, until it is clear what's wrong with it (PR/52966).

diffstat:

 sys/arch/x86/x86/identcpu.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (33 lines):

diff -r 22b28f0655bc -r 66f8d5b167f7 sys/arch/x86/x86/identcpu.c
--- a/sys/arch/x86/x86/identcpu.c       Fri Feb 09 18:31:52 2018 +0000
+++ b/sys/arch/x86/x86/identcpu.c       Fri Feb 09 18:45:55 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: identcpu.c,v 1.68 2018/02/07 22:49:32 maya Exp $       */
+/*     $NetBSD: identcpu.c,v 1.69 2018/02/09 18:45:55 maxv Exp $       */
 
 /*-
  * Copyright (c) 1999, 2000, 2001, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: identcpu.c,v 1.68 2018/02/07 22:49:32 maya Exp $");
+__KERNEL_RCSID(0, "$NetBSD: identcpu.c,v 1.69 2018/02/09 18:45:55 maxv Exp $");
 
 #include "opt_xen.h"
 
@@ -759,11 +759,12 @@
 
        x86_fpu_save = FPU_SAVE_XSAVE;
 
+#if 0 /* XXX PR 52966 */
        /* xsaveopt ought to be faster than xsave */
        x86_cpuid2(0xd, 1, descs);
-       if ((descs[0] & CPUID_PES1_XSAVEOPT) &&
-           (cpu_vendor == CPUVENDOR_INTEL)) /* XXX PR 52966 */
+       if (descs[0] & CPUID_PES1_XSAVEOPT)
                x86_fpu_save = FPU_SAVE_XSAVEOPT;
+#endif
 
        /* Get features and maximum size of the save area */
        x86_cpuid(0xd, descs);