From: Andi Kleen <ak@suse.de>
Date: Mon, 10 Jul 2006 15:06:21 +0000 (+0200)
Subject: [PATCH] x86_64: Allow oprofile for model P4 models
X-Git-Tag: v2.6.18-rc2~119
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=1cfcea1b2d67987ddb84dc75f454321bcf536555;p=linux-2.6-omap-h63xx.git

[PATCH] x86_64: Allow oprofile for model P4 models

Add it for P4 model 6 - reported to work and have a similar PMU to
earlier P4s.

Add an p4force=1 module override parameter for future use.

We had a discussion about that earlier - it's a trade off between the
PMU staying compatible or not.  I think the force parameter is a
reasonable compromise.

Cc: oprofile-list@lists.sf.net
Cc: Asit Mallick <asit.k.mallick@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/i386/oprofile/nmi_int.c b/arch/i386/oprofile/nmi_int.c
index fa8a37bcb39..c8c1df8ff2b 100644
--- a/arch/i386/oprofile/nmi_int.c
+++ b/arch/i386/oprofile/nmi_int.c
@@ -13,6 +13,7 @@
 #include <linux/oprofile.h>
 #include <linux/sysdev.h>
 #include <linux/slab.h>
+#include <linux/moduleparam.h>
 #include <asm/nmi.h>
 #include <asm/msr.h>
 #include <asm/apic.h>
@@ -296,12 +297,14 @@ static int nmi_create_files(struct super_block * sb, struct dentry * root)
 	return 0;
 }
  
+static int p4force;
+module_param(p4force, int, 0);
  
 static int __init p4_init(char ** cpu_type)
 {
 	__u8 cpu_model = boot_cpu_data.x86_model;
 
-	if (cpu_model > 4)
+	if (!p4force && (cpu_model > 6 || cpu_model == 5))
 		return 0;
 
 #ifndef CONFIG_SMP