Commit 2d5c80bc authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branch 'pm-cpuidle' 

* pm-cpuidle:
  cpuidle: ACPI: fix 'return' with no value build warning
  intel_idle: Customize IceLake server support
  cpuidle: change enter_s2idle() prototype
  cpuidle: psci: Prevent domain idlestates until consumers are ready
  cpuidle: psci: Convert PM domain to platform driver
  cpuidle: psci: Fix error path via converting to a platform driver
  cpuidle: psci: Fail cpuidle registration if set OSI mode failed
  cpuidle: psci: Split into two separate build objects
  intel_idle: Eliminate redundant static variable
parents 5b564207 0a398945

drivers/acpi/processor_idle.c

+6 −4
Original line number Diff line number Diff line
@@ -655,7 +655,7 @@ static int acpi_idle_enter(struct cpuidle_device *dev, 
	return index;

}



static void acpi_idle_enter_s2idle(struct cpuidle_device *dev,

static int acpi_idle_enter_s2idle(struct cpuidle_device *dev,

				  struct cpuidle_driver *drv, int index)

{

	struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
@@ -664,16 +664,18 @@ static void acpi_idle_enter_s2idle(struct cpuidle_device *dev, 
		struct acpi_processor *pr = __this_cpu_read(processors);



		if (unlikely(!pr))

			return;

			return 0;



		if (pr->flags.bm_check) {

			acpi_idle_enter_bm(pr, cx, false);

			return;

			return 0;

		} else {

			ACPI_FLUSH_CPU_CACHE();

		}

	}

	acpi_idle_do_entry(cx);



	return 0;

}



static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,

drivers/cpuidle/Kconfig.arm

+10 −0
Original line number Diff line number Diff line
@@ -23,6 +23,16 @@ config ARM_PSCI_CPUIDLE 
	  It provides an idle driver that is capable of detecting and

	  managing idle states through the PSCI firmware interface.



config ARM_PSCI_CPUIDLE_DOMAIN

	bool "PSCI CPU idle Domain"

	depends on ARM_PSCI_CPUIDLE

	depends on PM_GENERIC_DOMAINS_OF

	default y

	help

	  Select this to enable the PSCI based CPUidle driver to use PM domains,

	  which is needed to support the hierarchical DT based layout of the

	  idle states.



config ARM_BIG_LITTLE_CPUIDLE

	bool "Support for ARM big.LITTLE processors"

	depends on ARCH_VEXPRESS_TC2_PM || ARCH_EXYNOS || COMPILE_TEST

drivers/cpuidle/Makefile

+2 −3
Original line number Diff line number Diff line
@@ -21,9 +21,8 @@ obj-$(CONFIG_ARM_U8500_CPUIDLE) += cpuidle-ux500.o 
obj-$(CONFIG_ARM_AT91_CPUIDLE)          += cpuidle-at91.o

obj-$(CONFIG_ARM_EXYNOS_CPUIDLE)        += cpuidle-exynos.o

obj-$(CONFIG_ARM_CPUIDLE)		+= cpuidle-arm.o

obj-$(CONFIG_ARM_PSCI_CPUIDLE)		+= cpuidle_psci.o

cpuidle_psci-y				:= cpuidle-psci.o

cpuidle_psci-$(CONFIG_PM_GENERIC_DOMAINS_OF) += cpuidle-psci-domain.o

obj-$(CONFIG_ARM_PSCI_CPUIDLE)		+= cpuidle-psci.o

obj-$(CONFIG_ARM_PSCI_CPUIDLE_DOMAIN)	+= cpuidle-psci-domain.o

obj-$(CONFIG_ARM_TEGRA_CPUIDLE)		+= cpuidle-tegra.o

obj-$(CONFIG_ARM_QCOM_SPM_CPUIDLE)	+= cpuidle-qcom-spm.o

drivers/cpuidle/cpuidle-psci-domain.c

+51 −23
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/cpu.h>

#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/platform_device.h>

#include <linux/pm_domain.h>

#include <linux/pm_runtime.h>

#include <linux/psci.h>
@@ -26,7 +27,7 @@ struct psci_pd_provider { 
};



static LIST_HEAD(psci_pd_providers);

static bool osi_mode_enabled __initdata;

static bool psci_pd_allow_domain_state;



static int psci_pd_power_off(struct generic_pm_domain *pd)

{
@@ -36,6 +37,9 @@ static int psci_pd_power_off(struct generic_pm_domain *pd) 
	if (!state->data)

		return 0;



	if (!psci_pd_allow_domain_state)

		return -EBUSY;



	/* OSI mode is enabled, set the corresponding domain state. */

	pd_state = state->data;

	psci_set_domain_state(*pd_state);
@@ -43,7 +47,7 @@ static int psci_pd_power_off(struct generic_pm_domain *pd) 
	return 0;

}



static int __init psci_pd_parse_state_nodes(struct genpd_power_state *states,

static int psci_pd_parse_state_nodes(struct genpd_power_state *states,

				     int state_count)

{

	int i, ret;
@@ -73,7 +77,7 @@ free_state: 
	return ret;

}



static int __init psci_pd_parse_states(struct device_node *np,

static int psci_pd_parse_states(struct device_node *np,

			struct genpd_power_state **states, int *state_count)

{

	int ret;
@@ -101,7 +105,7 @@ static void psci_pd_free_states(struct genpd_power_state *states, 
	kfree(states);

}



static int __init psci_pd_init(struct device_node *np)

static int psci_pd_init(struct device_node *np)

{

	struct generic_pm_domain *pd;

	struct psci_pd_provider *pd_provider;
@@ -168,7 +172,7 @@ out: 
	return ret;

}



static void __init psci_pd_remove(void)

static void psci_pd_remove(void)

{

	struct psci_pd_provider *pd_provider, *it;

	struct generic_pm_domain *genpd;
@@ -186,7 +190,7 @@ static void __init psci_pd_remove(void) 
	}

}



static int __init psci_pd_init_topology(struct device_node *np, bool add)

static int psci_pd_init_topology(struct device_node *np, bool add)

{

	struct device_node *node;

	struct of_phandle_args child, parent;
@@ -212,24 +216,33 @@ static int __init psci_pd_init_topology(struct device_node *np, bool add) 
	return 0;

}



static int __init psci_pd_add_topology(struct device_node *np)

static int psci_pd_add_topology(struct device_node *np)

{

	return psci_pd_init_topology(np, true);

}



static void __init psci_pd_remove_topology(struct device_node *np)

static void psci_pd_remove_topology(struct device_node *np)

{

	psci_pd_init_topology(np, false);

}



static const struct of_device_id psci_of_match[] __initconst = {

static void psci_cpuidle_domain_sync_state(struct device *dev)

{

	/*

	 * All devices have now been attached/probed to the PM domain topology,

	 * hence it's fine to allow domain states to be picked.

	 */

	psci_pd_allow_domain_state = true;

}



static const struct of_device_id psci_of_match[] = {

	{ .compatible = "arm,psci-1.0" },

	{}

};



static int __init psci_idle_init_domains(void)

static int psci_cpuidle_domain_probe(struct platform_device *pdev)

{

	struct device_node *np = of_find_matching_node(NULL, psci_of_match);

	struct device_node *np = pdev->dev.of_node;

	struct device_node *node;

	int ret = 0, pd_count = 0;
@@ -238,7 +251,7 @@ static int __init psci_idle_init_domains(void) 


	/* Currently limit the hierarchical topology to be used in OSI mode. */

	if (!psci_has_osi_support())

		goto out;

		return 0;



	/*

	 * Parse child nodes for the "#power-domain-cells" property and
@@ -257,7 +270,7 @@ static int __init psci_idle_init_domains(void) 


	/* Bail out if not using the hierarchical CPU topology. */

	if (!pd_count)

		goto out;

		return 0;



	/* Link genpd masters/subdomains to model the CPU topology. */

	ret = psci_pd_add_topology(np);
@@ -272,10 +285,8 @@ static int __init psci_idle_init_domains(void) 
		goto remove_pd;

	}



	osi_mode_enabled = true;

	of_node_put(np);

	pr_info("Initialized CPU PM domain topology\n");

	return pd_count;

	return 0;



put_node:

	of_node_put(node);
@@ -283,19 +294,28 @@ remove_pd: 
	if (pd_count)

		psci_pd_remove();

	pr_err("failed to create CPU PM domains ret=%d\n", ret);

out:

	of_node_put(np);

	return ret;

}



static struct platform_driver psci_cpuidle_domain_driver = {

	.probe  = psci_cpuidle_domain_probe,

	.driver = {

		.name = "psci-cpuidle-domain",

		.of_match_table = psci_of_match,

		.sync_state = psci_cpuidle_domain_sync_state,

	},

};



static int __init psci_idle_init_domains(void)

{

	return platform_driver_register(&psci_cpuidle_domain_driver);

}

subsys_initcall(psci_idle_init_domains);



struct device __init *psci_dt_attach_cpu(int cpu)

struct device *psci_dt_attach_cpu(int cpu)

{

	struct device *dev;



	if (!osi_mode_enabled)

		return NULL;



	dev = dev_pm_domain_attach_by_name(get_cpu_device(cpu), "psci");

	if (IS_ERR_OR_NULL(dev))

		return dev;
@@ -306,3 +326,11 @@ struct device __init *psci_dt_attach_cpu(int cpu) 


	return dev;

}



void psci_dt_detach_cpu(struct device *dev)

{

	if (IS_ERR_OR_NULL(dev))

		return;



	dev_pm_domain_detach(dev, false);

}

drivers/cpuidle/cpuidle-psci.c

+80 −61
Original line number Diff line number Diff line
@@ -17,9 +17,11 @@ 
#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/psci.h>

#include <linux/pm_runtime.h>

#include <linux/slab.h>

#include <linux/string.h>



#include <asm/cpuidle.h>
@@ -33,7 +35,7 @@ struct psci_cpuidle_data { 


static DEFINE_PER_CPU_READ_MOSTLY(struct psci_cpuidle_data, psci_cpuidle_data);

static DEFINE_PER_CPU(u32, domain_state);

static bool psci_cpuidle_use_cpuhp __initdata;

static bool psci_cpuidle_use_cpuhp;



void psci_set_domain_state(u32 state)

{
@@ -104,7 +106,7 @@ static int psci_idle_cpuhp_down(unsigned int cpu) 
	return 0;

}



static void __init psci_idle_init_cpuhp(void)

static void psci_idle_init_cpuhp(void)

{

	int err;
@@ -127,30 +129,13 @@ static int psci_enter_idle_state(struct cpuidle_device *dev, 
	return psci_enter_state(idx, state[idx]);

}



static struct cpuidle_driver psci_idle_driver __initdata = {

	.name = "psci_idle",

	.owner = THIS_MODULE,

	/*

	 * PSCI idle states relies on architectural WFI to

	 * be represented as state index 0.

	 */

	.states[0] = {

		.enter                  = psci_enter_idle_state,

		.exit_latency           = 1,

		.target_residency       = 1,

		.power_usage		= UINT_MAX,

		.name                   = "WFI",

		.desc                   = "ARM WFI",

	}

};



static const struct of_device_id psci_idle_state_match[] __initconst = {

static const struct of_device_id psci_idle_state_match[] = {

	{ .compatible = "arm,idle-state",

	  .data = psci_enter_idle_state },

	{ },

};



int __init psci_dt_parse_state_node(struct device_node *np, u32 *state)

int psci_dt_parse_state_node(struct device_node *np, u32 *state)

{

	int err = of_property_read_u32(np, "arm,psci-suspend-param", state);
@@ -167,7 +152,7 @@ int __init psci_dt_parse_state_node(struct device_node *np, u32 *state) 
	return 0;

}



static int __init psci_dt_cpu_init_topology(struct cpuidle_driver *drv,

static int psci_dt_cpu_init_topology(struct cpuidle_driver *drv,

				     struct psci_cpuidle_data *data,

				     unsigned int state_count, int cpu)

{
@@ -190,7 +175,7 @@ static int __init psci_dt_cpu_init_topology(struct cpuidle_driver *drv, 
	return 0;

}



static int __init psci_dt_cpu_init_idle(struct cpuidle_driver *drv,

static int psci_dt_cpu_init_idle(struct device *dev, struct cpuidle_driver *drv,

				 struct device_node *cpu_node,

				 unsigned int state_count, int cpu)

{
@@ -200,7 +185,8 @@ static int __init psci_dt_cpu_init_idle(struct cpuidle_driver *drv, 
	struct psci_cpuidle_data *data = per_cpu_ptr(&psci_cpuidle_data, cpu);



	state_count++; /* Add WFI state too */

	psci_states = kcalloc(state_count, sizeof(*psci_states), GFP_KERNEL);

	psci_states = devm_kcalloc(dev, state_count, sizeof(*psci_states),

				   GFP_KERNEL);

	if (!psci_states)

		return -ENOMEM;
@@ -213,31 +199,25 @@ static int __init psci_dt_cpu_init_idle(struct cpuidle_driver *drv, 
		of_node_put(state_node);



		if (ret)

			goto free_mem;

			return ret;



		pr_debug("psci-power-state %#x index %d\n", psci_states[i], i);

	}



	if (i != state_count) {

		ret = -ENODEV;

		goto free_mem;

	}

	if (i != state_count)

		return -ENODEV;



	/* Initialize optional data, used for the hierarchical topology. */

	ret = psci_dt_cpu_init_topology(drv, data, state_count, cpu);

	if (ret < 0)

		goto free_mem;

		return ret;



	/* Idle states parsed correctly, store them in the per-cpu struct. */

	data->psci_states = psci_states;

	return 0;



free_mem:

	kfree(psci_states);

	return ret;

}



static __init int psci_cpu_init_idle(struct cpuidle_driver *drv,

static int psci_cpu_init_idle(struct device *dev, struct cpuidle_driver *drv,

			      unsigned int cpu, unsigned int state_count)

{

	struct device_node *cpu_node;
@@ -254,14 +234,22 @@ static __init int psci_cpu_init_idle(struct cpuidle_driver *drv, 
	if (!cpu_node)

		return -ENODEV;



	ret = psci_dt_cpu_init_idle(drv, cpu_node, state_count, cpu);

	ret = psci_dt_cpu_init_idle(dev, drv, cpu_node, state_count, cpu);



	of_node_put(cpu_node);



	return ret;

}



static int __init psci_idle_init_cpu(int cpu)

static void psci_cpu_deinit_idle(int cpu)

{

	struct psci_cpuidle_data *data = per_cpu_ptr(&psci_cpuidle_data, cpu);



	psci_dt_detach_cpu(data->dev);

	psci_cpuidle_use_cpuhp = false;

}



static int psci_idle_init_cpu(struct device *dev, int cpu)

{

	struct cpuidle_driver *drv;

	struct device_node *cpu_node;
@@ -284,17 +272,26 @@ static int __init psci_idle_init_cpu(int cpu) 
	if (ret)

		return ret;



	drv = kmemdup(&psci_idle_driver, sizeof(*drv), GFP_KERNEL);

	drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);

	if (!drv)

		return -ENOMEM;



	drv->name = "psci_idle";

	drv->owner = THIS_MODULE;

	drv->cpumask = (struct cpumask *)cpumask_of(cpu);



	/*

	 * Initialize idle states data, starting at index 1, since

	 * by default idle state 0 is the quiescent state reached

	 * by the cpu by executing the wfi instruction.

	 *

	 * PSCI idle states relies on architectural WFI to be represented as

	 * state index 0.

	 */

	drv->states[0].enter = psci_enter_idle_state;

	drv->states[0].exit_latency = 1;

	drv->states[0].target_residency = 1;

	drv->states[0].power_usage = UINT_MAX;

	strcpy(drv->states[0].name, "WFI");

	strcpy(drv->states[0].desc, "ARM WFI");



	/*

	 * If no DT idle states are detected (ret == 0) let the driver

	 * initialization fail accordingly since there is no reason to

	 * initialize the idle driver if only wfi is supported, the
@@ -302,48 +299,45 @@ static int __init psci_idle_init_cpu(int cpu) 
	 * on idle entry.

	 */

	ret = dt_init_idle_driver(drv, psci_idle_state_match, 1);

	if (ret <= 0) {

		ret = ret ? : -ENODEV;

		goto out_kfree_drv;

	}

	if (ret <= 0)

		return ret ? : -ENODEV;



	/*

	 * Initialize PSCI idle states.

	 */

	ret = psci_cpu_init_idle(drv, cpu, ret);

	ret = psci_cpu_init_idle(dev, drv, cpu, ret);

	if (ret) {

		pr_err("CPU %d failed to PSCI idle\n", cpu);

		goto out_kfree_drv;

		return ret;

	}



	ret = cpuidle_register(drv, NULL);

	if (ret)

		goto out_kfree_drv;

		goto deinit;



	cpuidle_cooling_register(drv);



	return 0;



out_kfree_drv:

	kfree(drv);

deinit:

	psci_cpu_deinit_idle(cpu);

	return ret;

}



/*

 * psci_idle_init - Initializes PSCI cpuidle driver

 * psci_idle_probe - Initializes PSCI cpuidle driver

 *

 * Initializes PSCI cpuidle driver for all CPUs, if any CPU fails

 * to register cpuidle driver then rollback to cancel all CPUs

 * registration.

 */

static int __init psci_idle_init(void)

static int psci_cpuidle_probe(struct platform_device *pdev)

{

	int cpu, ret;

	struct cpuidle_driver *drv;

	struct cpuidle_device *dev;



	for_each_possible_cpu(cpu) {

		ret = psci_idle_init_cpu(cpu);

		ret = psci_idle_init_cpu(&pdev->dev, cpu);

		if (ret)

			goto out_fail;

	}
@@ -356,9 +350,34 @@ out_fail: 
		dev = per_cpu(cpuidle_devices, cpu);

		drv = cpuidle_get_cpu_driver(dev);

		cpuidle_unregister(drv);

		kfree(drv);

		psci_cpu_deinit_idle(cpu);

	}



	return ret;

}



static struct platform_driver psci_cpuidle_driver = {

	.probe = psci_cpuidle_probe,

	.driver = {

		.name = "psci-cpuidle",

	},

};



static int __init psci_idle_init(void)

{

	struct platform_device *pdev;

	int ret;



	ret = platform_driver_register(&psci_cpuidle_driver);

	if (ret)

		return ret;



	pdev = platform_device_register_simple("psci-cpuidle", -1, NULL, 0);

	if (IS_ERR(pdev)) {

		platform_driver_unregister(&psci_cpuidle_driver);

		return PTR_ERR(pdev);

	}



	return 0;

}

device_initcall(psci_idle_init);

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