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From:   Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Date:   Wed, 26 Jun 2019 15:51:56 -0300
To:     Guo Ren <guoren@kernel.org>
Cc:     Mao Han <han_mao@c-sky.com>, linux-kernel@vger.kernel.org,
        linux-csky@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>
Subject: Re: [PATCH 1/1] perf annotate csky: Add perf annotate support
Message-ID: <20190626185156.GC3902@kernel.org>
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 <CAJF2gTRyma8sDMJaWCde1eOe6KSwn4_e=tJOT4d3kgmvzOxz8g@mail.gmail.com>
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Em Wed, Jun 26, 2019 at 02:56:55PM +0800, Guo Ren escreveu:
> Thx Mao,
> 
> Approved!

I guess I can take this as a:

Acked-by: Guo Ren <guoren@kernel.org>

Or would this better be:

Reviewed-by: Guo Ren <guoren@kernel.org>

?

- Arnaldo
 
> Best Regards
>  Guo Ren
> 
> On Wed, Jun 26, 2019 at 2:53 PM Mao Han <han_mao@c-sky.com> wrote:
> >
> > This patch add basic arch initialization and instruction associate support
> > for csky.
> >
> > perf annotate --stdio2
> > Samples: 161  of event 'cpu-clock:pppH', 4000 Hz, Event count (approx.):
> > 40250000, [percent: local period]
> > test_4() /usr/lib/perf-test/callchain_test
> > Percent
> >
> >             Disassembly of section .text:
> >
> >             00008420 <test_4>:
> >             test_4():
> >               subi  sp, sp, 4
> >               st.w  r8, (sp, 0x0)
> >               mov   r8, sp
> >               subi  sp, sp, 8
> >               subi  r3, r8, 4
> >               movi  r2, 0
> >               st.w  r2, (r3, 0x0)
> >             ↓ br    2e
> > 100.00  14:   subi  r3, r8, 4
> >               ld.w  r2, (r3, 0x0)
> >               subi  r3, r8, 8
> >               st.w  r2, (r3, 0x0)
> >               subi  r3, r8, 4
> >               ld.w  r3, (r3, 0x0)
> >               addi  r2, r3, 1
> >               subi  r3, r8, 4
> >               st.w  r2, (r3, 0x0)
> >         2e:   subi  r3, r8, 4
> >               ld.w  r2, (r3, 0x0)
> >               lrw   r3, 0x98967f    // 8598 <main+0x28>
> >               cmplt r3, r2
> >             ↑ bf    14
> >               mov   r0, r0
> >               mov   r0, r0
> >               mov   sp, r8
> >               ld.w  r8, (sp, 0x0)
> >               addi  sp, sp, 4
> >             ← rts
> >
> > Signed-off-by: Mao Han <han_mao@c-sky.com>
> > Cc: Guo Ren <guoren@kernel.org>
> > Cc: Peter Zijlstra <peterz@infradead.org>
> > Cc: Ingo Molnar <mingo@redhat.com>
> > Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
> > Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> > Cc: Jiri Olsa <jolsa@redhat.com>
> > Cc: Namhyung Kim <namhyung@kernel.org>
> > ---
> >  tools/perf/arch/csky/annotate/instructions.c | 48 ++++++++++++++++++++++++++++
> >  tools/perf/util/annotate.c                   |  5 +++
> >  2 files changed, 53 insertions(+)
> >  create mode 100644 tools/perf/arch/csky/annotate/instructions.c
> >
> > diff --git a/tools/perf/arch/csky/annotate/instructions.c b/tools/perf/arch/csky/annotate/instructions.c
> > new file mode 100644
> > index 0000000..5337bfb
> > --- /dev/null
> > +++ b/tools/perf/arch/csky/annotate/instructions.c
> > @@ -0,0 +1,48 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
> > +
> > +#include <linux/compiler.h>
> > +
> > +static struct ins_ops *csky__associate_ins_ops(struct arch *arch,
> > +                                              const char *name)
> > +{
> > +       struct ins_ops *ops = NULL;
> > +
> > +       /* catch all kind of jumps */
> > +       if (!strcmp(name, "bt") ||
> > +           !strcmp(name, "bf") ||
> > +           !strcmp(name, "bez") ||
> > +           !strcmp(name, "bnez") ||
> > +           !strcmp(name, "bnezad") ||
> > +           !strcmp(name, "bhsz") ||
> > +           !strcmp(name, "bhz") ||
> > +           !strcmp(name, "blsz") ||
> > +           !strcmp(name, "blz") ||
> > +           !strcmp(name, "br") ||
> > +           !strcmp(name, "jmpi") ||
> > +           !strcmp(name, "jmp"))
> > +               ops = &jump_ops;
> > +
> > +       /* catch function call */
> > +       if (!strcmp(name, "bsr") ||
> > +           !strcmp(name, "jsri") ||
> > +           !strcmp(name, "jsr"))
> > +               ops = &call_ops;
> > +
> > +       /* catch function return */
> > +       if (!strcmp(name, "rts"))
> > +               ops = &ret_ops;
> > +
> > +       if (ops)
> > +               arch__associate_ins_ops(arch, name, ops);
> > +       return ops;
> > +}
> > +
> > +static int csky__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
> > +{
> > +       arch->initialized = true;
> > +       arch->objdump.comment_char = '/';
> > +       arch->associate_instruction_ops = csky__associate_ins_ops;
> > +
> > +       return 0;
> > +}
> > diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> > index 79db038..eb2456e 100644
> > --- a/tools/perf/util/annotate.c
> > +++ b/tools/perf/util/annotate.c
> > @@ -144,6 +144,7 @@ static int arch__associate_ins_ops(struct arch* arch, const char *name, struct i
> >  #include "arch/arc/annotate/instructions.c"
> >  #include "arch/arm/annotate/instructions.c"
> >  #include "arch/arm64/annotate/instructions.c"
> > +#include "arch/csky/annotate/instructions.c"
> >  #include "arch/x86/annotate/instructions.c"
> >  #include "arch/powerpc/annotate/instructions.c"
> >  #include "arch/s390/annotate/instructions.c"
> > @@ -163,6 +164,10 @@ static struct arch architectures[] = {
> >                 .init = arm64__annotate_init,
> >         },
> >         {
> > +               .name = "csky",
> > +               .init = csky__annotate_init,
> > +       },
> > +       {
> >                 .name = "x86",
> >                 .init = x86__annotate_init,
> >                 .instructions = x86__instructions,
> > --
> > 2.7.4
> >
> 
> 
> -- 
> Best Regards
>  Guo Ren
> 
> ML: https://lore.kernel.org/linux-csky/

-- 

- Arnaldo