linux-kernel - Re: [PATCH 3/3] powerpc perf_event: Add alignment-faults and emulation-faults software events

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Date:	Mon, 19 Oct 2009 10:50:05 +1100
From:	Michael Ellerman <michael@...erman.id.au>
To:	Anton Blanchard <anton@...ba.org>
Cc:	benh@...nel.crashing.org, mingo@...e.hu, paulus@...ba.org,
	a.p.zijlstra@...llo.nl, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] powerpc perf_event: Add alignment-faults and
 emulation-faults software events

On Sun, 2009-10-18 at 22:13 +1100, Anton Blanchard wrote:
> Hook up the alignment-faults and emulation-faults events for powerpc.
> 
> Signed-off-by: Anton Blanchard <anton@...ba.org>
> ---
> 
> Index: linux.trees.git/arch/powerpc/include/asm/emulated_ops.h
> ===================================================================
> --- linux.trees.git.orig/arch/powerpc/include/asm/emulated_ops.h	2009-09-22 13:45:07.000000000 +1000
> +++ linux.trees.git/arch/powerpc/include/asm/emulated_ops.h	2009-09-22 13:45:27.000000000 +1000
> @@ -19,6 +19,7 @@
>  #define _ASM_POWERPC_EMULATED_OPS_H
>  
>  #include <asm/atomic.h>
> +#include <linux/perf_event.h>
>  
> 
>  #ifdef CONFIG_PPC_EMULATED_STATS
> @@ -71,7 +72,18 @@ extern void ppc_warn_emulated_print(cons
>  
>  #endif /* !CONFIG_PPC_EMULATED_STATS */
>  
> -#define PPC_WARN_EMULATED(type, regs)	__PPC_WARN_EMULATED(type)
> -#define PPC_WARN_ALIGNMENT(type, regs)	__PPC_WARN_EMULATED(type)
> +#define PPC_WARN_EMULATED(type, regs)					\
> +	do {								\
> +		perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS,		\
> +			1, 0, regs, 0);					\
> +		__PPC_WARN_EMULATED(type);				\
> +	} while (0)
> +
> +#define PPC_WARN_ALIGNMENT(type, regs)					\
> +	do {								\
> +		perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS,		\
> +			1, 0, regs, regs->dar);				\
> +		__PPC_WARN_EMULATED(type);				\
> +	} while (0)

Does that work with perfxxx configured off?

cheers

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