Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Enable EagerFPU by default. Sent on port-amd64@.

This commit is contained in:
maxv 2019-05-18 13:44:57 +00:00
parent 125e142f05
commit 154532873e
1 changed files with 3 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
sys/arch/x86/x86/identcpu.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: identcpu.c,v 1.89 2019/05/15 18:27:51 maxv Exp $ */
/* $NetBSD: identcpu.c,v 1.90 2019/05/18 13:44:57 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 1.89 2019/05/15 18:27:51 maxv Exp $");
__KERNEL_RCSID(0, "$NetBSD: identcpu.c,v 1.90 2019/05/18 13:44:57 maxv Exp $");
#include "opt_xen.h"
@ -744,55 +744,12 @@ cpu_probe_old_fpu(struct cpu_info *ci)
#endif
}
static void
cpu_probe_fpu_leak(struct cpu_info *ci)
{
/*
* INTEL-SA-00145. Affected CPUs are from Family 6.
*/
if (cpu_vendor != CPUVENDOR_INTEL) {
return;
}
if (CPUID_TO_FAMILY(ci->ci_signature) != 6) {
return;
}
switch (CPUID_TO_MODEL(ci->ci_signature)) {
/* Atom CPUs are not vulnerable. */
case 0x1c: /* Pineview */
case 0x26: /* Lincroft */
case 0x27: /* Penwell */
case 0x35: /* Cloverview */
case 0x36: /* Cedarview */
case 0x37: /* Baytrail / Valleyview (Silvermont) */
case 0x4d: /* Avaton / Rangely (Silvermont) */
case 0x4c: /* Cherrytrail / Brasswell */
case 0x4a: /* Merrifield */
case 0x5a: /* Moorefield */
case 0x5c: /* Goldmont */
case 0x5f: /* Denverton */
case 0x7a: /* Gemini Lake */
break;
/* Knights CPUs are not vulnerable. */
case 0x57: /* Knights Landing */
case 0x85: /* Knights Mill */
break;
/* The rest is vulnerable. */
default:
x86_fpu_eager = true;
break;
}
}
static void
cpu_probe_fpu(struct cpu_info *ci)
{
u_int descs[4];
cpu_probe_fpu_leak(ci);
x86_fpu_eager = true;
x86_fpu_save = FPU_SAVE_FSAVE;
#ifdef i386