linux-kernel - Re: [PATCH 2/2 -tip] x86: perf_counter update AMD hw caching related event table

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Date:	Sat, 13 Jun 2009 01:05:18 +0530
From:	Jaswinder Singh Rajput <jaswinder@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2 -tip] x86: perf_counter update AMD hw caching
 related event table

On Fri, 2009-06-12 at 19:35 +0200, Ingo Molnar wrote:
> * Jaswinder Singh Rajput <jaswinder@...nel.org> wrote:
> 
> > AMD shares same hw caching related event table.
> > 
> > Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
> > ---
> >  arch/x86/kernel/cpu/perf_counter.c |   36 +++++++++++++++---------------------
> >  1 files changed, 15 insertions(+), 21 deletions(-)
> 
> Looks good - but your patch does not apply anymore. (Neither to -git 
> nor to -tip)
> 

It is because of L2 -> LL

Here are new patches :

[PATCH 1/2 -tip] x86: perf_counter check AMD performance monitoring support

AMD supports performance monitoring from K7.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
---
 arch/x86/kernel/cpu/perf_counter.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index 275bc14..b74e602 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -1459,6 +1459,10 @@ static int intel_pmu_init(void)
 
 static int amd_pmu_init(void)
 {
+	/* performance-monitoring supported from K7 */
+	if (boot_cpu_data.x86 < 6)
+		return -ENODEV;
+
 	x86_pmu = amd_pmu;
 
 	switch (boot_cpu_data.x86) {
-- 
1.6.0.6



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