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From: Jean Delvare <khali@linux-fr.org>
To: Huaxu Wan <huaxu.wan@linux.intel.com>
Cc: Robert Hancock <hancockrwd@gmail.com>,
	Yuhong Bao <yuhongbao_386@hotmail.com>,
	lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org,
	yong.y.wang@linux.intel.com
Subject: Re: [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom
Date: Mon, 18 Jan 2010 08:07:11 +0000	[thread overview]
Message-ID: <20100118090711.5be2f70c@hyperion.delvare> (raw)
In-Reply-To: <20100118072138.GA25107@owl>

On Mon, 18 Jan 2010 15:21:38 +0800, Huaxu Wan wrote:
> On 21:05 Sun 17 Jan, Jean Delvare wrote:
> > Anyway, how difficult would it be to set TjMax based on the CPUID? I
> > presume that the Intel Atom 400 and 500 series have their own CPUID
> > value, haven't they? This would seem even easier that checking for a
> > PCI device.
> 
> Actually, all the Atom processors share the same CPUID(0x1C) and the
> worse is not all of them has the same TjMax. That's a big problem. 

0x1C is the product value. The stepping value could be different. There
could also be other identification methods based on cpuid() or rdmsr()
commands. This is done quite frequently to identify specific CPU models.

-- 
Jean Delvare

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lm-sensors@lm-sensors.org
http://lists.lm-sensors.org/mailman/listinfo/lm-sensors

WARNING: multiple messages have this Message-ID (diff)
From: Jean Delvare <khali@linux-fr.org>
To: Huaxu Wan <huaxu.wan@linux.intel.com>
Cc: Robert Hancock <hancockrwd@gmail.com>,
	Yuhong Bao <yuhongbao_386@hotmail.com>,
	lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org,
	yong.y.wang@linux.intel.com
Subject: Re: [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom  N450/D410/D510 CPUs
Date: Mon, 18 Jan 2010 09:07:11 +0100	[thread overview]
Message-ID: <20100118090711.5be2f70c@hyperion.delvare> (raw)
In-Reply-To: <20100118072138.GA25107@owl>

On Mon, 18 Jan 2010 15:21:38 +0800, Huaxu Wan wrote:
> On 21:05 Sun 17 Jan, Jean Delvare wrote:
> > Anyway, how difficult would it be to set TjMax based on the CPUID? I
> > presume that the Intel Atom 400 and 500 series have their own CPUID
> > value, haven't they? This would seem even easier that checking for a
> > PCI device.
> 
> Actually, all the Atom processors share the same CPUID(0x1C) and the
> worse is not all of them has the same TjMax. That's a big problem. 

0x1C is the product value. The stepping value could be different. There
could also be other identification methods based on cpuid() or rdmsr()
commands. This is done quite frequently to identify specific CPU models.

-- 
Jean Delvare

  reply	other threads:[~2010-01-18  8:07 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-24  7:31 [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Yong Wang
2010-01-06 15:08 ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom Jean Delvare
2010-01-06 15:08   ` [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Jean Delvare
2010-01-10 19:06   ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom Jean Delvare
2010-01-10 19:06     ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Jean Delvare
2010-01-11  6:20     ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Yong Wang
2010-01-11  6:20       ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Yong Wang
2010-01-16  2:02       ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom Yuhong Bao
2010-01-16  2:02         ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Yuhong Bao
2010-01-17 15:15         ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom Jean Delvare
2010-01-17 15:15           ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Jean Delvare
2010-01-17 19:29           ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom Robert Hancock
2010-01-17 19:29             ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Robert Hancock
2010-01-17 20:05             ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom Jean Delvare
2010-01-17 20:05               ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Jean Delvare
2010-01-18  6:58               ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Yong Wang
2010-01-18  6:58                 ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Yong Wang
2010-01-18  8:14                 ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom Jean Delvare
2010-01-18  8:14                   ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Jean Delvare
2010-01-18  8:27                   ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Yong Wang
2010-01-18  8:27                     ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Yong Wang
2010-01-18  7:21               ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom Huaxu Wan
2010-01-18  7:21                 ` [lm-sensors] [PATCH] hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs Huaxu Wan
2010-01-18  8:07                 ` Jean Delvare [this message]
2010-01-18  8:07                   ` Jean Delvare

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