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From: Zenghui Yu <yuzenghui@huawei.com>
To: Marc Zyngier <maz@kernel.org>
Cc: <linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Will Deacon <will@kernel.org>
Subject: Re: [PATCH] perf: arm_pmu_acpi: Get rid of the edge-triggered interrupt oddity
Date: Mon, 27 Jul 2026 19:40:59 +0800	[thread overview]
Message-ID: <69221ad8-9283-2bcf-e92c-a7b4fd2107cc@huawei.com> (raw)
In-Reply-To: <20260725162627.145301-1-maz@kernel.org>

On 2026/7/26 0:26, Marc Zyngier wrote:
> The ACPI spec bizarrely indicates that the PMU interrupt can be
> edge-triggered, which contradicts the very basics of the PMU
> architecture (SW is required to clear the interrupt condition for
> the level to drop).
> 
> Remove the code parsing this flag and always flag the interrupt
> as level triggered, no matter what firmware says.
> 
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
>  drivers/perf/arm_pmu_acpi.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)

Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>

Thanks,
Zenghui

  reply	other threads:[~2026-07-27 11:41 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-25 16:26 Marc Zyngier
2026-07-27 11:40 ` Zenghui Yu [this message]
2026-08-02 12:12 ` Will Deacon

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