From: Oliver Upton <oliver.upton@linux.dev>
To: Kunkun Jiang <jiangkunkun@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Marc Zyngier <maz@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
wanghaibin.wang@huawei.com, yuzenghui@huawei.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] clocksource/drivers/arm_arch_timer: Fix handling of ARM erratum 858921
Date: Wed, 14 Sep 2022 11:18:14 +0100 [thread overview]
Message-ID: <YyGqZmO9vibRmd8n@google.com> (raw)
In-Reply-To: <20220914061424.1260-1-jiangkunkun@huawei.com>
On Wed, Sep 14, 2022 at 02:14:24PM +0800, Kunkun Jiang wrote:
> The commit a38b71b0833e ("clocksource/drivers/arm_arch_timer:
> Move system register timer programming over to CVAL") moves the
> programming of the timers from the countdown timer (TVAL) over
> to the comparator (CVAL). This makes it necessary to read the
> counter when programming next event. However, the workaround of
> Cortex-A73 erratum 858921 does not set the corresponding
> set_next_event_phys and set_next_event_virt.
>
> Add the appropriate hooks to apply the erratum mitigation when
> programming the next timer event.
>
> Fixes: a38b71b0833e ("clocksource/drivers/arm_arch_timer: Move system register timer programming over to CVAL")
> Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
> Acked-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
--
Thanks,
Oliver
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next prev parent reply other threads:[~2022-09-14 10:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-14 6:14 [PATCH v3] clocksource/drivers/arm_arch_timer: Fix handling of ARM erratum 858921 Kunkun Jiang
2022-09-14 10:18 ` Oliver Upton [this message]
2022-09-20 8:33 ` Daniel Lezcano
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