From: Abel Vesa <abel.vesa@nxp.com> To: Sudeep Holla <sudeep.holla@arm.com>, Marc Zyngier <marc.zyngier@arm.com>, Rob Herring <robh@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <kernel@pengutronix.de>, "catalin.marinas@arm.com" <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Fabio Estevam <fabio.estevam@nxp.com>, Lucas Stach <l.stach@pengutronix.de>, Aisheng Dong <aisheng.dong@nxp.com> Cc: dl-linux-imx <linux-imx@nxp.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>, Abel Vesa <abel.vesa@nxp.com> Subject: [RFC 0/7] cpuidle: Add poking mechanism to support non-IPI wakeup Date: Wed, 27 Mar 2019 13:21:05 +0000 [thread overview] Message-ID: <1553692845-20983-1-git-send-email-abel.vesa@nxp.com> (raw) This work is a workaround I'm looking into (more as a background task) in order to add support for cpuidle on i.MX8MQ based platforms. The main idea here is getting around the missing GIC wake_request signal (due to integration design issue) by waking up a each individual core through some dedicated SW power-up bits inside the power controller (GPC) right before every IPI is requested for that each individual core. This work is basically composed of four parts (in kernel): - the cpuidle core poking mechanism along with the related sched/irq_work calls - the cpuidle-arm ops addition in order to support poking, along with the 'local-wakeup-poke' DT idle state knob - the psci and cpu_ops cpu_poke addition - the i.MX8MQ specific idle states in dts There is also a change needed in TF-A which is available here: https://lists.trustedfirmware.org/pipermail/tf-a/2019-March/000009.html Abel Vesa (7): sched: idle: Add sched get idle state helper cpuidle: Add cpu poke support smp: Poke the cores before requesting IPI psci: Add cpu_poke ops to support core poking cpuidle-arm: Add ops to support poke alonside enter cpuidle-arm: Add arm64 wake helper for cpu_poke op arm64: dts: imx8mq: Add cpu-sleep state with poke wake-up enabled arch/arm64/boot/dts/freescale/imx8mq.dtsi | 20 ++++++++++++++++++ arch/arm64/include/asm/cpu_ops.h | 1 + arch/arm64/include/asm/cpuidle.h | 6 ++++++ arch/arm64/kernel/cpuidle.c | 8 ++++++++ arch/arm64/kernel/psci.c | 1 + drivers/cpuidle/cpuidle-arm.c | 13 +++++++++++- drivers/cpuidle/cpuidle.c | 34 +++++++++++++++++++++++++++++++ drivers/cpuidle/dt_idle_states.c | 15 +++++++++----- drivers/cpuidle/dt_idle_states.h | 10 +++++++++ drivers/firmware/psci.c | 6 ++++++ include/linux/cpuidle.h | 7 +++++++ include/linux/psci.h | 1 + include/uapi/linux/psci.h | 2 ++ kernel/irq_work.c | 19 ++++++++++++++--- kernel/sched/core.c | 16 ++++++++++----- kernel/sched/idle.c | 11 ++++++++++ kernel/smp.c | 10 ++++++++- kernel/time/tick-broadcast.c | 4 ++++ 18 files changed, 169 insertions(+), 15 deletions(-) -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Abel Vesa <abel.vesa@nxp.com> To: Sudeep Holla <sudeep.holla@arm.com>, Marc Zyngier <marc.zyngier@arm.com>, Rob Herring <robh@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <kernel@pengutronix.de>, "catalin.marinas@arm.com" <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Fabio Estevam <fabio.estevam@nxp.com>, Lucas Stach <l.stach@pengutronix.de>, Aisheng Dong <aisheng.dong@nxp.com> Cc: Abel Vesa <abel.vesa@nxp.com>, "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>, dl-linux-imx <linux-imx@nxp.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org> Subject: [RFC 0/7] cpuidle: Add poking mechanism to support non-IPI wakeup Date: Wed, 27 Mar 2019 13:21:05 +0000 [thread overview] Message-ID: <1553692845-20983-1-git-send-email-abel.vesa@nxp.com> (raw) This work is a workaround I'm looking into (more as a background task) in order to add support for cpuidle on i.MX8MQ based platforms. The main idea here is getting around the missing GIC wake_request signal (due to integration design issue) by waking up a each individual core through some dedicated SW power-up bits inside the power controller (GPC) right before every IPI is requested for that each individual core. This work is basically composed of four parts (in kernel): - the cpuidle core poking mechanism along with the related sched/irq_work calls - the cpuidle-arm ops addition in order to support poking, along with the 'local-wakeup-poke' DT idle state knob - the psci and cpu_ops cpu_poke addition - the i.MX8MQ specific idle states in dts There is also a change needed in TF-A which is available here: https://lists.trustedfirmware.org/pipermail/tf-a/2019-March/000009.html Abel Vesa (7): sched: idle: Add sched get idle state helper cpuidle: Add cpu poke support smp: Poke the cores before requesting IPI psci: Add cpu_poke ops to support core poking cpuidle-arm: Add ops to support poke alonside enter cpuidle-arm: Add arm64 wake helper for cpu_poke op arm64: dts: imx8mq: Add cpu-sleep state with poke wake-up enabled arch/arm64/boot/dts/freescale/imx8mq.dtsi | 20 ++++++++++++++++++ arch/arm64/include/asm/cpu_ops.h | 1 + arch/arm64/include/asm/cpuidle.h | 6 ++++++ arch/arm64/kernel/cpuidle.c | 8 ++++++++ arch/arm64/kernel/psci.c | 1 + drivers/cpuidle/cpuidle-arm.c | 13 +++++++++++- drivers/cpuidle/cpuidle.c | 34 +++++++++++++++++++++++++++++++ drivers/cpuidle/dt_idle_states.c | 15 +++++++++----- drivers/cpuidle/dt_idle_states.h | 10 +++++++++ drivers/firmware/psci.c | 6 ++++++ include/linux/cpuidle.h | 7 +++++++ include/linux/psci.h | 1 + include/uapi/linux/psci.h | 2 ++ kernel/irq_work.c | 19 ++++++++++++++--- kernel/sched/core.c | 16 ++++++++++----- kernel/sched/idle.c | 11 ++++++++++ kernel/smp.c | 10 ++++++++- kernel/time/tick-broadcast.c | 4 ++++ 18 files changed, 169 insertions(+), 15 deletions(-) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2019-03-27 13:21 UTC|newest] Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-27 13:21 Abel Vesa [this message] 2019-03-27 13:21 ` [RFC 0/7] cpuidle: Add poking mechanism to support non-IPI wakeup Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` [RFC 1/7] sched: idle: Add sched get idle state helper Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` [RFC 2/7] cpuidle: Add cpu poke support Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` [RFC 3/7] smp: Poke the cores before requesting IPI Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` [RFC 4/7] psci: Add cpu_poke ops to support core poking Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` [RFC 5/7] cpuidle-arm: Add ops to support poke alonside enter Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` [RFC 6/7] cpuidle-arm: Add arm64 wake helper for cpu_poke op Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` [RFC 7/7] arm64: dts: imx8mq: Add cpu-sleep state with poke wake-up enabled Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 13:21 ` Abel Vesa 2019-03-27 15:44 ` [RFC 0/7] cpuidle: Add poking mechanism to support non-IPI wakeup Lucas Stach 2019-03-27 15:44 ` Lucas Stach 2019-03-27 15:44 ` Lucas Stach 2019-03-27 15:57 ` Marc Zyngier 2019-03-27 15:57 ` Marc Zyngier 2019-03-27 15:57 ` Marc Zyngier 2019-03-27 16:06 ` Lucas Stach 2019-03-27 16:06 ` Lucas Stach 2019-03-27 16:06 ` Lucas Stach 2019-03-27 17:00 ` Leonard Crestez 2019-03-27 17:00 ` Leonard Crestez 2019-03-27 17:00 ` Leonard Crestez 2019-03-27 17:11 ` Lucas Stach 2019-03-27 17:11 ` Lucas Stach 2019-03-27 17:11 ` Lucas Stach 2019-03-27 18:13 ` Marc Zyngier 2019-03-27 18:13 ` Marc Zyngier 2019-03-27 18:13 ` Marc Zyngier 2019-03-28 11:21 ` Aisheng Dong 2019-03-28 11:21 ` Aisheng Dong 2019-03-28 11:21 ` Aisheng Dong 2019-03-29 9:11 ` Richard Zhu 2019-03-29 9:11 ` Richard Zhu 2019-03-29 9:11 ` Richard Zhu 2019-03-27 17:45 ` Marc Zyngier 2019-03-27 17:45 ` Marc Zyngier 2019-03-27 17:45 ` Marc Zyngier 2019-03-27 17:55 ` Lucas Stach 2019-03-27 17:55 ` Lucas Stach 2019-03-27 17:55 ` Lucas Stach 2019-03-28 11:27 ` Aisheng Dong 2019-03-28 11:27 ` Aisheng Dong 2019-03-28 11:27 ` Aisheng Dong 2019-03-27 18:40 ` Leonard Crestez 2019-03-27 18:40 ` Leonard Crestez 2019-03-27 18:40 ` Leonard Crestez 2019-03-28 10:35 ` Marc Zyngier 2019-03-28 10:35 ` Marc Zyngier 2019-03-28 10:35 ` Marc Zyngier 2019-03-28 10:36 ` Rafael J. Wysocki 2019-03-28 10:36 ` Rafael J. Wysocki 2019-03-28 10:36 ` Rafael J. Wysocki 2019-03-28 11:55 ` Aisheng Dong 2019-03-28 11:55 ` Aisheng Dong 2019-03-28 11:55 ` Aisheng Dong 2019-03-28 10:45 ` Lorenzo Pieralisi 2019-03-28 10:45 ` Lorenzo Pieralisi 2019-03-28 10:45 ` Lorenzo Pieralisi 2019-11-06 20:14 ` Florian Fainelli 2019-11-06 20:14 ` Florian Fainelli 2019-11-06 21:31 ` Leonard Crestez 2019-11-06 21:31 ` Leonard Crestez 2019-11-06 22:10 ` Florian Fainelli 2019-11-06 22:10 ` Florian Fainelli 2019-11-06 22:47 ` Leonard Crestez 2019-11-06 22:47 ` Leonard Crestez
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