linux-kernel - Re: [PATCH 2/2] powerpc/mm: Trace tlbia instruction

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Message-ID: <20180320094320.03ae264d@balbir.ozlabs.ibm.com>
Date:   Tue, 20 Mar 2018 09:43:20 +1100
From:   Balbir Singh <bsingharora@...il.com>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Scott Wood <oss@...error.net>, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH  2/2] powerpc/mm: Trace tlbia instruction

On Mon, 19 Mar 2018 11:32:40 +0100 (CET)
Christophe Leroy <christophe.leroy@....fr> wrote:

> Add a trace point for tlbia (Translation Lookaside Buffer Invalidate
> All) instruction.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
> ---
>  arch/powerpc/include/asm/trace.h | 15 +++++++++++++++
>  arch/powerpc/mm/mmu_decl.h       |  2 ++
>  2 files changed, 17 insertions(+)
> 
> diff --git a/arch/powerpc/include/asm/trace.h b/arch/powerpc/include/asm/trace.h
> index 33f3b479138b..d1d63b173dd7 100644
> --- a/arch/powerpc/include/asm/trace.h
> +++ b/arch/powerpc/include/asm/trace.h
> @@ -202,6 +202,21 @@ TRACE_EVENT(tlbie,
>  		__entry->r)
>  );
>  
> +TRACE_EVENT(tlbia,
> +
> +	TP_PROTO(unsigned long lpid),
> +	TP_ARGS(lpid),
> +	TP_STRUCT__entry(
> +		__field(unsigned long, lpid)
> +		),
> +
> +	TP_fast_assign(
> +		__entry->lpid = lpid;
> +		),
> +
> +	TP_printk("lpid=%ld", __entry->lpid)
> +);


Do we want to call this lpid?

Balbir Singh.