linux-kernel - Re: [PATCH 5/6] perf_counter: powerpc: Add processor back-end for MPC7450 family

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Message-ID: <19002.44369.638997.584055@cargo.ozlabs.ibm.com>
Date:	Fri, 19 Jun 2009 07:10:41 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Kumar Gala <galak@...nel.crashing.org>
Cc:	Ingo Molnar <mingo@...e.hu>, benh@...nel.crashing.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: Re: [PATCH 5/6] perf_counter: powerpc: Add processor back-end for MPC7450 family

Kumar Gala writes:

> In looking at doing this what suggestions do you have in implementing  
> perf_instruction_pointer() if we don't have the equivalent of SIAR.   
> Just use regs->nip ?

Yes, exactly.  If you don't have SIAR/SDAR/MMCRA, the default
definitions for perf_instruction_pointer and perf_misc_flags in
include/linux/perf_counter.h are fine, and you get them if
perf_misc_flags is not defined.

Paul.
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