From: Sasha Levin <sashal@kernel.org>
To: Mark Rutland <mark.rutland@arm.com>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Junhao He <hejunhao3@huawei.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Yicong Yang <yangyicong@hisilicon.com>,
Will Deacon <will@kernel.org>,
zhangshaokun@hisilicon.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH AUTOSEL 6.4 11/12] drivers/perf: hisi: Add support for HiSilicon H60PA and PAv3 PMU driver
Date: Fri, 21 Jul 2023 11:13:57 -0400 [thread overview]
Message-ID: <ZLqgtRcgGqmHUXFM@sashalap> (raw)
In-Reply-To: <ZKKfjW6Ix9dg11QZ@FVFF77S0Q05N>
On Mon, Jul 03, 2023 at 11:14:37AM +0100, Mark Rutland wrote:
>On Sun, Jul 02, 2023 at 03:50:56PM -0400, Sasha Levin wrote:
>> From: Junhao He <hejunhao3@huawei.com>
>>
>> [ Upstream commit 1a51688474c0d395b864e98236335fba712e29bf ]
>>
>> Compared to the original PA device, H60PA offers higher bandwidth.
>> The H60PA is a new device and we use HID to differentiate them.
>>
>> The events supported by PAv3 and PAv2 are different. The PAv3 PMU
>> removed some events which are supported by PAv2 PMU. The older PA
>> PMU driver will probe v3 as v2. Therefore PA events displayed by
>> "perf list" cannot work properly. We add the HISI0275 HID for PAv3
>> PMU to distinguish different.
>>
>> For each H60PA PMU, except for the overflow interrupt register, other
>> functions of the H60PA PMU are the same as the original PA PMU module.
>> It has 8-programable counters and each counter is free-running.
>> Interrupt is supported to handle counter (64-bits) overflow.
>>
>> Signed-off-by: Junhao He <hejunhao3@huawei.com>
>> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
>> Reviewed-by: Yicong Yang <yangyicong@hisilicon.com>
>> Acked-by: Mark Rutland <mark.rutland@arm.com>
>> Link: https://lore.kernel.org/r/20230615125926.29832-2-hejunhao3@huawei.com
>> Signed-off-by: Will Deacon <will@kernel.org>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>> ---
>> drivers/perf/hisilicon/hisi_uncore_pa_pmu.c | 127 +++++++++++++++++---
>> drivers/perf/hisilicon/hisi_uncore_pmu.h | 8 ++
>> 2 files changed, 120 insertions(+), 15 deletions(-)
>
>Why is this being backported to stable?
>
>This patch adds supoprt for new HW, and is clearly not a fix, so it's not clear
>to me why it has been selected.
I'll drop it, thanks.
--
Thanks,
Sasha
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prev parent reply other threads:[~2023-07-21 15:14 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20230702195057.1787686-1-sashal@kernel.org>
2023-07-02 19:50 ` [PATCH AUTOSEL 6.4 07/12] arm64: cpufeature: detect FEAT_HCX Sasha Levin
2023-07-03 11:51 ` Mark Brown
2023-07-09 14:56 ` Sasha Levin
2023-07-09 21:13 ` Mark Brown
2023-07-10 9:44 ` Will Deacon
2023-07-10 13:31 ` Greg KH
2023-07-10 13:47 ` Mark Brown
2023-07-10 14:09 ` Greg KH
2023-07-02 19:50 ` [PATCH AUTOSEL 6.4 09/12] arm64: set __exception_irq_entry with __irq_entry as a default Sasha Levin
2023-07-02 19:50 ` [PATCH AUTOSEL 6.4 10/12] arm64: mm: fix VA-range sanity check Sasha Levin
2023-07-02 19:50 ` [PATCH AUTOSEL 6.4 11/12] drivers/perf: hisi: Add support for HiSilicon H60PA and PAv3 PMU driver Sasha Levin
2023-07-03 10:14 ` Mark Rutland
2023-07-21 15:13 ` Sasha Levin [this message]
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