linux-kernel - Re: perf tools: add support for generating bpf prologue on powerpc

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Message-ID: <20160507111347.GP7880@naverao1-tp.in.ibm.com>
Date:	Sat, 7 May 2016 16:43:47 +0530
From:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
To:	Michael Ellerman <mpe@...erman.id.au>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Wang Nan <wangnan0@...wei.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Ian Munsie <imunsie@....ibm.com>
Subject: Re: perf tools: add support for generating bpf prologue on powerpc

On 2016/05/07 02:15PM, Michael Ellerman wrote:
> On Thu, 2016-05-05 at 15:23:19 UTC, "Naveen N. Rao" wrote:
> > Generalize existing macros to serve the purpose.
> > 
> > Cc: Wang Nan <wangnan0@...wei.com>
> > Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> > Cc: Masami Hiramatsu <mhiramat@...nel.org>
> > Cc: Ian Munsie <imunsie@....ibm.com>
> > Cc: Michael Ellerman <mpe@...erman.id.au>
> > Signed-off-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
> > ---
> > With this patch:
> >     # ./perf test 37
> >     37: Test BPF filter                                          :
> >     37.1: Test basic BPF filtering                               : Ok
> >     37.2: Test BPF prologue generation                           : Ok
> >     37.3: Test BPF relocation checker                            : Ok
> > 
> >  tools/perf/arch/powerpc/Makefile          |  1 +
> >  tools/perf/arch/powerpc/util/dwarf-regs.c | 40 +++++++++++++++++++++----------
> >  2 files changed, 29 insertions(+), 12 deletions(-)
> 
> Looks feasible, and is in powerpc only code, should I take this or acme?

Hi Michael,
Arnaldo has already pulled this in:
http://article.gmane.org/gmane.linux.kernel/2216051

It would be good if you can consider user stackdump as that depends on 
perf regs support which you have added to powerpc-next:
http://thread.gmane.org/gmane.linux.kernel/2210299/focus=2210749

Thanks,
Naveen