From: Martin Kepplinger <martink@posteo.de>
To: Abel Vesa <abelvesa@gmail.com>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <marc.zyngier@arm.com>,
Lucas Stach <l.stach@pengutronix.de>, Bai Ping <ping.bai@nxp.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Leonard Crestez <leonard.crestez@nxp.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
NXP Linux Team <linux-imx@nxp.com>,
linux-arm-kernel@lists.infradead.org,
Carlo Caione <ccaione@baylibre.com>
Subject: Re: [RFC 0/2] Add workaround for core wake-up on IPI for i.MX8MQ
Date: Wed, 30 Oct 2019 08:33:44 +0100 [thread overview]
Message-ID: <02ed2f06-7873-72a1-5610-961efaca28ac@posteo.de> (raw)
In-Reply-To: <7d3a868a-768c-3cb1-c6d8-bf5fcd1ddd1c@posteo.de>
On 30.10.19 07:11, Martin Kepplinger wrote:
> On 23.06.19 13:47, Martin Kepplinger wrote:
>> On 10.06.19 14:13, Abel Vesa wrote:
>>> This is another alternative for the RFC:
>>> https://lkml.org/lkml/2019/3/27/545
>>>
>>> This new workaround proposal is a little bit more hacky but more contained
>>> since everything is done within the irq-imx-gpcv2 driver.
>>>
>>> Basically, it 'hijacks' the registered gic_raise_softirq __smp_cross_call
>>> handler and registers instead a wrapper which calls in the 'hijacked'
>>> handler, after that calling into EL3 which will take care of the actual
>>> wake up. This time, instead of expanding the PSCI ABI, we use a new vendor SIP.
>>>
>>> I also have the patches ready for TF-A but I'll hold on to them until I see if
>>> this has a chance of getting in.
>>
>
> Hi Abel,
>
> Running this workaround doesn't seem to work anymore on 5.4-rcX. Linux
> doesn't boot, with ATF unchanged (includes your workaround changes). I
> can try to add more details to this...
>
When I run this change instead:
https://source.puri.sm/Librem5/linux-next/commit/e59807ae0e236512761b751abc84a9b129d7fcda
(again, with the same ATF) Linux 5.4 boots, but simply doesn't load a
cpuidle driver (cpu-sleep; and cpuidle in /sys/devices/system/cpu/cpu0).
Still, since this is starting with 5.4-rcX, my previous questions stay
the same :)
thanks,
martin
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next prev parent reply other threads:[~2019-10-30 7:33 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-10 12:13 [RFC 0/2] Add workaround for core wake-up on IPI for i.MX8MQ Abel Vesa
2019-06-10 12:13 ` [RFC 1/2] irqchip: irq-imx-gpcv2: Add workaround for i.MX8MQ ERR11171 Abel Vesa
2019-06-10 12:38 ` Leonard Crestez
2019-06-10 13:24 ` Marc Zyngier
2019-06-10 13:38 ` Abel Vesa
2019-06-10 13:51 ` Marc Zyngier
2019-06-10 14:12 ` Abel Vesa
2019-06-10 14:28 ` Marc Zyngier
2019-06-10 12:13 ` [RFC 2/2] arm64: dts: imx8mq: Add idle states and gpcv2 wake_request broken property Abel Vesa
2019-06-10 13:19 ` [RFC 0/2] Add workaround for core wake-up on IPI for i.MX8MQ Mark Rutland
2019-06-10 13:29 ` Abel Vesa
2019-06-10 13:39 ` Marc Zyngier
2019-06-10 13:55 ` Abel Vesa
2019-06-10 14:07 ` Marc Zyngier
2019-06-10 14:32 ` Leonard Crestez
2019-06-10 14:52 ` Marc Zyngier
2019-06-12 7:14 ` Thomas Gleixner
2019-06-12 7:35 ` Marc Zyngier
2019-06-12 7:37 ` Thomas Gleixner
2019-06-23 11:47 ` Martin Kepplinger
2019-06-28 8:54 ` Abel Vesa
2019-07-02 6:47 ` Martin Kepplinger
2019-07-02 11:33 ` Abel Vesa
2019-07-08 7:54 ` Martin Kepplinger
2019-07-08 12:20 ` Martin Kepplinger
2019-10-30 6:11 ` Martin Kepplinger
2019-10-30 7:33 ` Martin Kepplinger [this message]
2019-10-30 8:08 ` Abel Vesa
2019-10-30 8:14 ` Martin Kepplinger
2019-11-04 8:49 ` Martin Kepplinger
2019-11-04 10:35 ` Abel Vesa
2019-11-06 11:59 ` Martin Kepplinger
2019-11-06 22:36 ` Leonard Crestez
2019-11-08 11:21 ` Martin Kepplinger
2019-11-08 11:50 ` Abel Vesa
2019-11-08 14:17 ` Martin Kepplinger
2019-11-11 7:54 ` Abel Vesa
2019-11-25 17:23 ` Martin Kepplinger
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