linux-kernel - Re: privilege levels and kernel mode

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Message-Id: <1160953329.5732.91.camel@localhost.localdomain>
Date:	Mon, 16 Oct 2006 00:02:09 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	ranjith kumar <ranjit_kumar_b4u@...oo.co.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: privilege levels and kernel mode

Ar Sul, 2006-10-15 am 20:17 +0100, ysgrifennodd ranjith kumar:
> I know how to include assembly instructions in a C
> program to wtrite into "Model specific registers". But
> that program has to be run at privilege level zero.

Its more hairy than that because of SMP and handling overflows and
according to whether you need to profile all use or your own task and so
on. Fortunately someone has done all the hard work already - take a look
at the oprofile support in the kernel and see if it will do what you
need.

Alan
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