linux-kernel - Re: [PATCH] MIPS: perf: Fix wrong check condition of Loongson event IDs

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Date:   Tue, 1 Sep 2020 16:44:05 +0800
From:   Huang Pei <huangpei@...ngson.cn>
To:     Huacai Chen <chenhc@...ote.com>
Cc:     Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        "open list:MIPS" <linux-mips@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Xuefeng Li <lixuefeng@...ngson.cn>
Subject: Re: [PATCH] MIPS: perf: Fix wrong check condition of Loongson event
 IDs

On Fri, Aug 28, 2020 at 04:49:37PM +0800, Huacai Chen wrote:
> Hi, Pei,
> 
> On Thu, Aug 27, 2020 at 4:05 PM Tiezhu Yang <yangtiezhu@...ngson.cn> wrote:
> >
> > According to the user's manual chapter 8.2.1 of Loongson 3A2000 CPU [1]
> > and 3A3000 CPU [2], we should take some event IDs such as 274, 358, 359
> > and 360 as valid in the check condition, otherwise they are recognized
> > as "not supported", fix it.
> I think this patch needs you to confirm.
> 
> >
> > [1] http://www.loongson.cn/uploadfile/cpu/3A2000/Loongson3A2000_user2.pdf
> > [2] http://www.loongson.cn/uploadfile/cpu/3A3000/Loongson3A3000_3B3000user2.pdf
> >
> > Fixes: e9dfbaaeef1c ("MIPS: perf: Add hardware perf events support for new Loongson-3")
> > Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
> > ---
> >  arch/mips/kernel/perf_event_mipsxx.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
> > index efce5de..011eb6bb 100644
> > --- a/arch/mips/kernel/perf_event_mipsxx.c
> > +++ b/arch/mips/kernel/perf_event_mipsxx.c
> > @@ -1898,8 +1898,8 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
> >                                 (base_id >= 64 && base_id < 90) ||
> >                                 (base_id >= 128 && base_id < 164) ||
> >                                 (base_id >= 192 && base_id < 200) ||
> > -                               (base_id >= 256 && base_id < 274) ||
> > -                               (base_id >= 320 && base_id < 358) ||
> > +                               (base_id >= 256 && base_id < 275) ||
> > +                               (base_id >= 320 && base_id < 361) ||
> >                                 (base_id >= 384 && base_id < 574))
> >                                 break;
> >
> > --
> > 2.1.0
> >
Acked-by: Huang Pei <huangpei@...ngson.cn>