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From: Zhengyuan Liu <liuzhengyuang521@gmail.com>
To: john.garry@huawei.com
Cc: zhangshaokun@hisilicon.com, kong.kongxinwei@hisilicon.com,
	linux-arm-kernel@lists.infradead.org
Subject: BUG about Hisilicon PMU
Date: Mon, 11 Jan 2021 16:25:34 +0800	[thread overview]
Message-ID: <CAOOPZo747=_PnrexkNFt_gXj5TE+GpxEv=wc_3kh+nRX3dDZ3w@mail.gmail.com> (raw)

Hi, all

When boot v5.11-rc2 on my Kunpeng 920 PC, the kernel will block at PMU
initialization stage, and after binary-search with bisect I found that
this problem was introduced by commit ac4511c9364c ("drivers/perf:
hisi: Add identifier sysfs file"),
and to be more accurate it actually blocked at following position:

    hisi_hha_pmu_init_data():
         hha_pmu->identifier = readl(hha_pmu->base + HHA_VERSION);

If you guys had already know this problem, please ignore this message.

Thanks,

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             reply	other threads:[~2021-01-11  8:27 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-11  8:25 Zhengyuan Liu [this message]
2021-01-11  9:13 ` BUG about Hisilicon PMU John Garry
2021-01-11  9:33   ` Shaokun Zhang
2021-01-11 11:38     ` Zhengyuan Liu
2021-01-12  7:38       ` Shaokun Zhang
2021-01-12  7:46         ` Zhengyuan Liu

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