From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, linux-pm@vger.kernel.org
Cc: Sudeep Holla <sudeep.holla@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
LKML <linux-kernel@vger.kernel.org>,
LAKML <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 3/6] drivers: firmware: psci: Decouple checker from generic ARM CPUidle
Date: Wed, 7 Aug 2019 16:09:55 +0200 [thread overview]
Message-ID: <fe87dffb-91f9-01b3-b1b8-7f5776e1274c@linaro.org> (raw)
In-Reply-To: <20190722153745.32446-4-lorenzo.pieralisi@arm.com>
On 22/07/2019 17:37, Lorenzo Pieralisi wrote:
> The PSCI checker currently relies on the generic ARM CPUidle
> infrastructure to enter an idle state, which in turn creates
> a dependency that is not really needed.
>
> The PSCI checker code to test PSCI CPU suspend is built on
> top of the CPUidle framework and can easily reuse the
> struct cpuidle_state.enter() function (previously initialized
> by an idle driver, with a PSCI back-end) to trigger an entry
> into an idle state, decoupling the PSCI checker from the
> generic ARM CPUidle infrastructure and simplyfing the code
> in the process.
>
> Convert the PSCI checker suspend entry function to use
> the struct cpuidle_state.enter() function callback.
>
> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Sudeep Holla <sudeep.holla@arm.com>
> Cc: Mark Rutland <mark.rutland@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> ---
> drivers/firmware/psci/psci_checker.c | 16 +++++++---------
> 1 file changed, 7 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/firmware/psci/psci_checker.c b/drivers/firmware/psci/psci_checker.c
> index f3659443f8c2..6a445397771c 100644
> --- a/drivers/firmware/psci/psci_checker.c
> +++ b/drivers/firmware/psci/psci_checker.c
> @@ -228,8 +228,11 @@ static int hotplug_tests(void)
>
> static void dummy_callback(struct timer_list *unused) {}
>
> -static int suspend_cpu(int index, bool broadcast)
> +static int suspend_cpu(struct cpuidle_device *dev,
> + struct cpuidle_driver *drv, int index)
> {
> + struct cpuidle_state *state = &drv->states[index];
> + bool broadcast = state->flags & CPUIDLE_FLAG_TIMER_STOP;
> int ret;
>
> arch_cpu_idle_enter();
> @@ -254,11 +257,7 @@ static int suspend_cpu(int index, bool broadcast)
> }
> }
>
> - /*
> - * Replicate the common ARM cpuidle enter function
> - * (arm_enter_idle_state).
> - */
> - ret = CPU_PM_CPU_IDLE_ENTER(arm_cpuidle_suspend, index);
> + ret = state->enter(dev, drv, index);
>
> if (broadcast)
> tick_broadcast_exit();
> @@ -301,9 +300,8 @@ static int suspend_test_thread(void *arg)
> * doesn't use PSCI).
> */
> for (index = 1; index < drv->state_count; ++index) {
> - struct cpuidle_state *state = &drv->states[index];
> - bool broadcast = state->flags & CPUIDLE_FLAG_TIMER_STOP;
> int ret;
> + struct cpuidle_state *state = &drv->states[index];
>
> /*
> * Set the timer to wake this CPU up in some time (which
> @@ -318,7 +316,7 @@ static int suspend_test_thread(void *arg)
> /* IRQs must be disabled during suspend operations. */
> local_irq_disable();
>
> - ret = suspend_cpu(index, broadcast);
> + ret = suspend_cpu(dev, drv, index);
>
> /*
> * We have woken up. Re-enable IRQs to handle any
>
--
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next prev parent reply other threads:[~2019-08-07 14:10 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 15:37 [PATCH 0/6] ARM: psci: cpuidle: PSCI CPUidle rework Lorenzo Pieralisi
2019-07-22 15:37 ` [PATCH 1/6] ARM: cpuidle: Remove useless header include Lorenzo Pieralisi
2019-08-06 15:51 ` Sudeep Holla
2019-08-07 8:19 ` Daniel Lezcano
2019-07-22 15:37 ` [PATCH 2/6] ARM: cpuidle: Remove overzealous error logging Lorenzo Pieralisi
2019-08-06 15:51 ` Sudeep Holla
2019-08-07 8:20 ` Daniel Lezcano
2019-07-22 15:37 ` [PATCH 3/6] drivers: firmware: psci: Decouple checker from generic ARM CPUidle Lorenzo Pieralisi
2019-08-06 15:54 ` Sudeep Holla
2019-08-07 14:09 ` Daniel Lezcano [this message]
2019-07-22 15:37 ` [PATCH 4/6] ARM: psci: cpuidle: Introduce PSCI CPUidle driver Lorenzo Pieralisi
2019-07-23 11:46 ` Ulf Hansson
2019-07-23 14:15 ` Lorenzo Pieralisi
2019-08-06 16:10 ` Sudeep Holla
2019-08-06 16:34 ` Lorenzo Pieralisi
2019-08-07 16:30 ` Daniel Lezcano
2019-07-22 15:37 ` [PATCH 5/6] ARM: psci: cpuidle: Enable " Lorenzo Pieralisi
2019-08-06 16:16 ` Sudeep Holla
2019-08-06 16:40 ` Lorenzo Pieralisi
2019-07-22 15:37 ` [PATCH 6/6] PSCI: cpuidle: Refactor CPU suspend power_state parameter handling Lorenzo Pieralisi
2019-07-23 11:47 ` Ulf Hansson
2019-08-07 18:09 ` Daniel Lezcano
2019-08-08 12:55 ` Sudeep Holla
2019-08-08 15:29 ` Ulf Hansson
2019-08-08 16:04 ` Sudeep Holla
2019-07-23 11:49 ` [PATCH 0/6] ARM: psci: cpuidle: PSCI CPUidle rework Ulf Hansson
2019-07-23 14:19 ` Lorenzo Pieralisi
2019-08-09 11:03 ` [PATCH v2 0/8] " Lorenzo Pieralisi
2019-08-09 11:03 ` [PATCH v2 1/8] ARM: cpuidle: Remove useless header include Lorenzo Pieralisi
2019-08-09 11:03 ` [PATCH v2 2/8] ARM: cpuidle: Remove overzealous error logging Lorenzo Pieralisi
2019-08-09 11:03 ` [PATCH v2 3/8] drivers: firmware: psci: Decouple checker from generic ARM CPUidle Lorenzo Pieralisi
2019-08-09 11:03 ` [PATCH v2 4/8] ARM: psci: cpuidle: Introduce PSCI CPUidle driver Lorenzo Pieralisi
2019-08-09 11:03 ` [PATCH v2 5/8] ARM: psci: cpuidle: Enable " Lorenzo Pieralisi
2019-08-09 11:03 ` [PATCH v2 6/8] PSCI: cpuidle: Refactor CPU suspend power_state parameter handling Lorenzo Pieralisi
2019-08-09 11:03 ` [PATCH v2 7/8] arm64: defconfig: Enable the PSCI CPUidle driver Lorenzo Pieralisi
2019-08-09 16:53 ` Will Deacon
2019-08-09 11:03 ` [PATCH v2 8/8] ARM: imx_v6_v7_defconfig: " Lorenzo Pieralisi
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