From: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
To: <torvalds@osdl.org>
Cc: <linux-kernel@vger.kernel.org>,
"Mallick, Asit K" <asit.k.mallick@intel.com>
Subject: [PATCH] Use of Performance Monitoring Counters based on Model number
Date: Wed, 16 Jul 2003 10:07:49 -0700 [thread overview]
Message-ID: <C8C38546F90ABF408A5961FC01FDBF1902C7D0F9@fmsmsx405.fm.intel.com> (raw)
Attached is a small patch to make Linux kernel use of performance
monitoring MSRs based on known processor models. Future processor
implementation models may not support the same MSR layout.
Please apply.
Thanks,
-Venkatesh
--- linux-2.5.72-monitor/arch/i386/kernel/nmi.c.org 2003-06-16
21:20:02.000000000 -0700
+++ linux-2.5.72-monitor/arch/i386/kernel/nmi.c 2003-06-20
15:47:29.000000000 -0700
@@ -157,9 +157,15 @@
case X86_VENDOR_INTEL:
switch (boot_cpu_data.x86) {
case 6:
+ if (boot_cpu_data.x86_model > 0xd)
+ break;
+
wrmsr(MSR_P6_EVNTSEL0, 0, 0);
break;
case 15:
+ if (boot_cpu_data.x86_model > 0x3)
+ break;
+
wrmsr(MSR_P4_IQ_CCCR0, 0, 0);
wrmsr(MSR_P4_CRU_ESCR0, 0, 0);
break;
@@ -324,9 +338,15 @@
case X86_VENDOR_INTEL:
switch (boot_cpu_data.x86) {
case 6:
+ if (boot_cpu_data.x86_model > 0xd)
+ return;
+
setup_p6_watchdog();
break;
case 15:
+ if (boot_cpu_data.x86_model > 0x3)
+ return;
+
if (!setup_p4_watchdog())
return;
break;
next reply other threads:[~2003-07-16 16:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-16 17:07 Pallipadi, Venkatesh [this message]
2003-07-16 17:19 ` [PATCH] Use of Performance Monitoring Counters based on Model number John Levon
2003-07-16 18:05 ` Dave Jones
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