Commit 3ff32a0d authored by Russell King's avatar Russell King

Merge branch 'devel-stable' into for-linus

Conflicts:
	drivers/perf/arm_pmu.c
parents 40d3f028 81497953
......@@ -26,13 +26,19 @@ Required properties:
Optional properties:
- interrupt-affinity : Valid only when using SPIs, specifies a list of phandles
to CPU nodes corresponding directly to the affinity of
- interrupt-affinity : When using SPIs, specifies a list of phandles to CPU
nodes corresponding directly to the affinity of
the SPIs listed in the interrupts property.
This property should be present when there is more than
When using a PPI, specifies a list of phandles to CPU
nodes corresponding to the set of CPUs which have
a PMU of this type signalling the PPI listed in the
interrupts property.
This property should be present when there is more than
a single SPI.
- qcom,no-pc-write : Indicates that this PMU doesn't support the 0xc and 0xd
events.
......
......@@ -799,11 +799,13 @@ F: arch/arm/include/asm/floppy.h
ARM PMU PROFILING AND DEBUGGING
M: Will Deacon <will.deacon@arm.com>
S: Maintained
F: arch/arm/kernel/perf_event*
F: arch/arm/kernel/perf_*
F: arch/arm/oprofile/common.c
F: arch/arm/include/asm/pmu.h
F: arch/arm/kernel/hw_breakpoint.c
F: arch/arm/include/asm/hw_breakpoint.h
F: arch/arm/include/asm/perf_event.h
F: drivers/perf/arm_pmu.c
F: include/linux/perf/arm_pmu.h
ARM PORT
M: Russell King <linux@arm.linux.org.uk>
......@@ -8064,6 +8066,15 @@ S: Maintained
F: include/linux/power_supply.h
F: drivers/power/
POWER STATE COORDINATION INTERFACE (PSCI)
M: Mark Rutland <mark.rutland@arm.com>
M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
L: linux-arm-kernel@lists.infradead.org
S: Maintained
F: drivers/firmware/psci.c
F: include/linux/psci.h
F: include/uapi/linux/psci.h
PNP SUPPORT
M: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
S: Maintained
......
......@@ -1499,6 +1499,7 @@ config HOTPLUG_CPU
config ARM_PSCI
bool "Support for the ARM Power State Coordination Interface (PSCI)"
depends on CPU_V7
select ARM_PSCI_FW
help
Say Y here if you want Linux to communicate with system firmware
implementing the PSCI specification for CPU-centric power
......@@ -1719,12 +1720,8 @@ config CPU_SW_DOMAIN_PAN
the remainder of userspace will become appropriately inaccessible.
config HW_PERF_EVENTS
bool "Enable hardware performance counter support for perf events"
depends on PERF_EVENTS
default y
help
Enable hardware performance counter support for perf events. If
disabled, perf events will use software events only.
def_bool y
depends on ARM_PMU
config SYS_SUPPORTS_HUGETLBFS
def_bool y
......
......@@ -14,34 +14,11 @@
#ifndef __ASM_ARM_PSCI_H
#define __ASM_ARM_PSCI_H
#define PSCI_POWER_STATE_TYPE_STANDBY 0
#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
struct psci_power_state {
u16 id;
u8 type;
u8 affinity_level;
};
struct psci_operations {
int (*cpu_suspend)(struct psci_power_state state,
unsigned long entry_point);
int (*cpu_off)(struct psci_power_state state);
int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
int (*migrate)(unsigned long cpuid);
int (*affinity_info)(unsigned long target_affinity,
unsigned long lowest_affinity_level);
int (*migrate_info_type)(void);
};
extern struct psci_operations psci_ops;
extern struct smp_operations psci_smp_ops;
#ifdef CONFIG_ARM_PSCI
int psci_init(void);
bool psci_smp_available(void);
#else
static inline int psci_init(void) { return 0; }
static inline bool psci_smp_available(void) { return false; }
#endif
......
......@@ -71,8 +71,7 @@ obj-$(CONFIG_CPU_PJ4) += pj4-cp0.o
obj-$(CONFIG_CPU_PJ4B) += pj4-cp0.o
obj-$(CONFIG_IWMMXT) += iwmmxt.o
obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o
obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o \
perf_event_xscale.o perf_event_v6.o \
obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_xscale.o perf_event_v6.o \
perf_event_v7.o
CFLAGS_pj4-cp0.o := -marm
AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
......@@ -89,7 +88,7 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_ARM_VIRT_EXT) += hyp-stub.o
ifeq ($(CONFIG_ARM_PSCI),y)
obj-y += psci.o psci-call.o
obj-y += psci-call.o
obj-$(CONFIG_SMP) += psci_smp.o
endif
......
......@@ -34,9 +34,9 @@
#include <asm/cputype.h>
#include <asm/irq_regs.h>
#include <asm/pmu.h>
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
enum armv6_perf_types {
......
......@@ -21,11 +21,11 @@
#include <asm/cp15.h>
#include <asm/cputype.h>
#include <asm/irq_regs.h>
#include <asm/pmu.h>
#include <asm/vfp.h>
#include "../vfp/vfpinstr.h"
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
/*
......
......@@ -16,9 +16,9 @@
#include <asm/cputype.h>
#include <asm/irq_regs.h>
#include <asm/pmu.h>
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
enum xscale_perf_types {
......
......@@ -17,6 +17,8 @@
#include <linux/smp.h>
#include <linux/of.h>
#include <linux/delay.h>
#include <linux/psci.h>
#include <uapi/linux/psci.h>
#include <asm/psci.h>
......@@ -51,22 +53,34 @@ static int psci_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
if (psci_ops.cpu_on)
return psci_ops.cpu_on(cpu_logical_map(cpu),
__pa(secondary_startup));
virt_to_idmap(&secondary_startup));
return -ENODEV;
}
#ifdef CONFIG_HOTPLUG_CPU
int psci_cpu_disable(unsigned int cpu)
{
/* Fail early if we don't have CPU_OFF support */
if (!psci_ops.cpu_off)
return -EOPNOTSUPP;
/* Trusted OS will deny CPU_OFF */
if (psci_tos_resident_on(cpu))
return -EPERM;
return 0;
}
void __ref psci_cpu_die(unsigned int cpu)
{
const struct psci_power_state ps = {
.type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
};
u32 state = PSCI_POWER_STATE_TYPE_POWER_DOWN <<
PSCI_0_2_POWER_STATE_TYPE_SHIFT;
if (psci_ops.cpu_off)
psci_ops.cpu_off(ps);
if (psci_ops.cpu_off)
psci_ops.cpu_off(state);
/* We should never return */
panic("psci: cpu %d failed to shutdown\n", cpu);
/* We should never return */
panic("psci: cpu %d failed to shutdown\n", cpu);
}
int __ref psci_cpu_kill(unsigned int cpu)
......@@ -109,6 +123,7 @@ bool __init psci_smp_available(void)
struct smp_operations __initdata psci_smp_ops = {
.smp_boot_secondary = psci_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_disable = psci_cpu_disable,
.cpu_die = psci_cpu_die,
.cpu_kill = psci_cpu_kill,
#endif
......
......@@ -31,6 +31,7 @@
#include <linux/bug.h>
#include <linux/compiler.h>
#include <linux/sort.h>
#include <linux/psci.h>
#include <asm/unified.h>
#include <asm/cp15.h>
......@@ -976,7 +977,7 @@ void __init setup_arch(char **cmdline_p)
unflatten_device_tree();
arm_dt_init_cpu_maps();
psci_init();
psci_dt_init();
xen_early_init();
#ifdef CONFIG_SMP
if (is_smp()) {
......
......@@ -28,8 +28,8 @@
#include <linux/reboot.h>
#include <linux/amba/bus.h>
#include <linux/platform_device.h>
#include <linux/psci.h>
#include <asm/psci.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
......
......@@ -16,19 +16,21 @@
#include <linux/cpu_pm.h>
#include <linux/init.h>
#include <linux/psci.h>
#include <linux/suspend.h>
#include <asm/suspend.h>
#include <asm/psci.h>
#include <uapi/linux/psci.h>
#define HIGHBANK_SUSPEND_PARAM \
((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \
(1 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \
(PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT))
static int highbank_suspend_finish(unsigned long val)
{
const struct psci_power_state ps = {
.type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
.affinity_level = 1,
};
return psci_ops.cpu_suspend(ps, __pa(cpu_resume));
return psci_ops.cpu_suspend(HIGHBANK_SUSPEND_PARAM, __pa(cpu_resume));
}
static int highbank_pm_enter(suspend_state_t state)
......
......@@ -20,10 +20,10 @@
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/perf/arm_pmu.h>
#include <linux/regulator/machine.h>
#include <linux/random.h>
#include <asm/pmu.h>
#include <asm/mach/map.h>
#include "setup.h"
......
......@@ -20,6 +20,7 @@ config ARM64
select ARM_GIC_V2M if PCI_MSI
select ARM_GIC_V3
select ARM_GIC_V3_ITS if PCI_MSI
select ARM_PSCI_FW
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
select COMMON_CLK
......
......@@ -12,11 +12,11 @@
#ifndef _ASM_ACPI_H
#define _ASM_ACPI_H
#include <linux/mm.h>
#include <linux/irqchip/arm-gic-acpi.h>
#include <linux/mm.h>
#include <linux/psci.h>
#include <asm/cputype.h>
#include <asm/psci.h>
#include <asm/smp_plat.h>
/* Macros for consistency checks of the GICC subtable of MADT */
......
......@@ -18,23 +18,17 @@
#include <linux/init.h>
#include <linux/of.h>
#include <linux/smp.h>
#include <linux/reboot.h>
#include <linux/pm.h>
#include <linux/delay.h>
#include <linux/psci.h>
#include <linux/slab.h>
#include <uapi/linux/psci.h>
#include <asm/compiler.h>
#include <asm/cputype.h>
#include <asm/cpu_ops.h>
#include <asm/errno.h>
#include <asm/psci.h>
#include <asm/smp_plat.h>
#include <asm/suspend.h>
#include <asm/system_misc.h>
#define PSCI_POWER_STATE_TYPE_STANDBY 0
#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
static bool psci_power_state_loses_context(u32 state)
{
......@@ -50,122 +44,8 @@ static bool psci_power_state_is_valid(u32 state)
return !(state & ~valid_mask);
}
/*
* The CPU any Trusted OS is resident on. The trusted OS may reject CPU_OFF
* calls to its resident CPU, so we must avoid issuing those. We never migrate
* a Trusted OS even if it claims to be capable of migration -- doing so will
* require cooperation with a Trusted OS driver.
*/
static int resident_cpu = -1;
struct psci_operations {
int (*cpu_suspend)(u32 state, unsigned long entry_point);
int (*cpu_off)(u32 state);
int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
int (*migrate)(unsigned long cpuid);
int (*affinity_info)(unsigned long target_affinity,
unsigned long lowest_affinity_level);
int (*migrate_info_type)(void);
};
static struct psci_operations psci_ops;
typedef unsigned long (psci_fn)(unsigned long, unsigned long,
unsigned long, unsigned long);
asmlinkage psci_fn __invoke_psci_fn_hvc;
asmlinkage psci_fn __invoke_psci_fn_smc;
static psci_fn *invoke_psci_fn;
enum psci_function {
PSCI_FN_CPU_SUSPEND,
PSCI_FN_CPU_ON,
PSCI_FN_CPU_OFF,
PSCI_FN_MIGRATE,
PSCI_FN_MAX,
};
static DEFINE_PER_CPU_READ_MOSTLY(u32 *, psci_power_state);
static u32 psci_function_id[PSCI_FN_MAX];
static int psci_to_linux_errno(int errno)
{
switch (errno) {
case PSCI_RET_SUCCESS:
return 0;
case PSCI_RET_NOT_SUPPORTED:
return -EOPNOTSUPP;
case PSCI_RET_INVALID_PARAMS:
return -EINVAL;
case PSCI_RET_DENIED:
return -EPERM;
};
return -EINVAL;
}
static u32 psci_get_version(void)
{
return invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
}
static int psci_cpu_suspend(u32 state, unsigned long entry_point)
{
int err;
u32 fn;
fn = psci_function_id[PSCI_FN_CPU_SUSPEND];
err = invoke_psci_fn(fn, state, entry_point, 0);
return psci_to_linux_errno(err);
}
static int psci_cpu_off(u32 state)
{
int err;
u32 fn;
fn = psci_function_id[PSCI_FN_CPU_OFF];
err = invoke_psci_fn(fn, state, 0, 0);
return psci_to_linux_errno(err);
}
static int psci_cpu_on(unsigned long cpuid, unsigned long entry_point)
{
int err;
u32 fn;
fn = psci_function_id[PSCI_FN_CPU_ON];
err = invoke_psci_fn(fn, cpuid, entry_point, 0);
return psci_to_linux_errno(err);
}
static int psci_migrate(unsigned long cpuid)
{
int err;
u32 fn;
fn = psci_function_id[PSCI_FN_MIGRATE];
err = invoke_psci_fn(fn, cpuid, 0, 0);
return psci_to_linux_errno(err);
}
static int psci_affinity_info(unsigned long target_affinity,
unsigned long lowest_affinity_level)
{
return invoke_psci_fn(PSCI_0_2_FN64_AFFINITY_INFO, target_affinity,
lowest_affinity_level, 0);
}
static int psci_migrate_info_type(void)
{
return invoke_psci_fn(PSCI_0_2_FN_MIGRATE_INFO_TYPE, 0, 0, 0);
}
static unsigned long psci_migrate_info_up_cpu(void)
{
return invoke_psci_fn(PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU, 0, 0, 0);
}
static int __maybe_unused cpu_psci_cpu_init_idle(unsigned int cpu)
{
int i, ret, count = 0;
......@@ -230,238 +110,6 @@ static int __maybe_unused cpu_psci_cpu_init_idle(unsigned int cpu)
return ret;
}
static int get_set_conduit_method(struct device_node *np)
{
const char *method;
pr_info("probing for conduit method from DT.\n");
if (of_property_read_string(np, "method", &method)) {
pr_warn("missing \"method\" property\n");
return -ENXIO;
}
if (!strcmp("hvc", method)) {
invoke_psci_fn = __invoke_psci_fn_hvc;
} else if (!strcmp("smc", method)) {
invoke_psci_fn = __invoke_psci_fn_smc;
} else {
pr_warn("invalid \"method\" property: %s\n", method);
return -EINVAL;
}
return 0;
}
static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd)
{
invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0);
}
static void psci_sys_poweroff(void)
{
invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
}
/*
* Detect the presence of a resident Trusted OS which may cause CPU_OFF to
* return DENIED (which would be fatal).
*/
static void __init psci_init_migrate(void)
{
unsigned long cpuid;
int type, cpu;
type = psci_ops.migrate_info_type();
if (type == PSCI_0_2_TOS_MP) {
pr_info("Trusted OS migration not required\n");
return;
}
if (type == PSCI_RET_NOT_SUPPORTED) {
pr_info("MIGRATE_INFO_TYPE not supported.\n");
return;
}
if (type != PSCI_0_2_TOS_UP_MIGRATE &&
type != PSCI_0_2_TOS_UP_NO_MIGRATE) {
pr_err("MIGRATE_INFO_TYPE returned unknown type (%d)\n", type);
return;
}
cpuid = psci_migrate_info_up_cpu();
if (cpuid & ~MPIDR_HWID_BITMASK) {
pr_warn("MIGRATE_INFO_UP_CPU reported invalid physical ID (0x%lx)\n",
cpuid);
return;
}
cpu = get_logical_index(cpuid);
resident_cpu = cpu >= 0 ? cpu : -1;
pr_info("Trusted OS resident on physical CPU 0x%lx\n", cpuid);
}
static void __init psci_0_2_set_functions(void)
{
pr_info("Using standard PSCI v0.2 function IDs\n");
psci_function_id[PSCI_FN_CPU_SUSPEND] = PSCI_0_2_FN64_CPU_SUSPEND;
psci_ops.cpu_suspend = psci_cpu_suspend;
psci_function_id[PSCI_FN_CPU_OFF] = PSCI_0_2_FN_CPU_OFF;
psci_ops.cpu_off = psci_cpu_off;
psci_function_id[PSCI_FN_CPU_ON] = PSCI_0_2_FN64_CPU_ON;
psci_ops.cpu_on = psci_cpu_on;
psci_function_id[PSCI_FN_MIGRATE] = PSCI_0_2_FN64_MIGRATE;
psci_ops.migrate = psci_migrate;
psci_ops.affinity_info = psci_affinity_info;
psci_ops.migrate_info_type = psci_migrate_info_type;
arm_pm_restart = psci_sys_reset;
pm_power_off = psci_sys_poweroff;
}
/*
* Probe function for PSCI firmware versions >= 0.2
*/
static int __init psci_probe(void)
{
u32 ver = psci_get_version();
pr_info("PSCIv%d.%d detected in firmware.\n",
PSCI_VERSION_MAJOR(ver),
PSCI_VERSION_MINOR(ver));
if (PSCI_VERSION_MAJOR(ver) == 0 && PSCI_VERSION_MINOR(ver) < 2) {
pr_err("Conflicting PSCI version detected.\n");
return -EINVAL;
}
psci_0_2_set_functions();
psci_init_migrate();
return 0;
}
typedef int (*psci_initcall_t)(const struct device_node *);
/*
* PSCI init function for PSCI versions >=0.2
*
* Probe based on PSCI PSCI_VERSION function
*/
static int __init psci_0_2_init(struct device_node *np)
{
int err;
err = get_set_conduit_method(np);
if (err)
goto out_put_node;
/*
* Starting with v0.2, the PSCI specification introduced a call
* (PSCI_VERSION) that allows probing the firmware version, so
* that PSCI function IDs and version specific initialization
* can be carried out according to the specific version reported
* by firmware
*/
err = psci_probe();
out_put_node:
of_node_put(np);
return err;
}
/*
* PSCI < v0.2 get PSCI Function IDs via DT.
*/
static int __init psci_0_1_init(struct device_node *np)
{
u32 id;
int err;
err = get_set_conduit_method(np);
if (err)
goto out_put_node;
pr_info("Using PSCI v0.1 Function IDs from DT\n");
if (!of_property_read_u32(np, "cpu_suspend", &id)) {
psci_function_id[PSCI_FN_CPU_SUSPEND] = id;
psci_ops.cpu_suspend = psci_cpu_suspend;
}
if (!of_property_read_u32(np, "cpu_off", &id)) {
psci_function_id[PSCI_FN_CPU_OFF] = id;
psci_ops.cpu_off = psci_cpu_off;
}
if (!of_property_read_u32(np, "cpu_on", &id)) {
psci_function_id[PSCI_FN_CPU_ON] = id;
psci_ops.cpu_on = psci_cpu_on;
}
if (!of_property_read_u32(np, "migrate", &id)) {
psci_function_id[PSCI_FN_MIGRATE] = id;
psci_ops.migrate = psci_migrate;
}
out_put_node:
of_node_put(np);
return err;
}
static const struct of_device_id psci_of_match[] __initconst = {
{ .compatible = "arm,psci", .data = psci_0_1_init},
{ .compatible = "arm,psci-0.2", .data = psci_0_2_init},
{},
};
int __init psci_dt_init(void)
{
struct device_node *np;
const struct of_device_id *matched_np;
psci_initcall_t init_fn;
np = of_find_matching_node_and_match(NULL, psci_of_match, &matched_np);
if (!np)
return -ENODEV;
init_fn = (psci_initcall_t)matched_np->data;
return init_fn(np);
}
#ifdef CONFIG_ACPI
/*
* We use PSCI 0.2+ when ACPI is deployed on ARM64 and it's
* explicitly clarified in SBBR
*/
int __init psci_acpi_init(void)
{
if (!acpi_psci_present()) {
pr_info("is not implemented in ACPI.\n");
return -EOPNOTSUPP;
}
pr_info("probing for conduit method from ACPI.\n");
if (acpi_psci_use_hvc())
invoke_psci_fn = __invoke_psci_fn_hvc;
else
invoke_psci_fn = __invoke_psci_fn_smc;
return psci_probe();
}
#endif
#ifdef CONFIG_SMP
static int __init cpu_psci_cpu_init(unsigned int cpu)
......@@ -489,11 +137,6 @@ static int cpu_psci_cpu_boot(unsigned int cpu)
}
#ifdef CONFIG_HOTPLUG_CPU
static bool psci_tos_resident_on(int cpu)
{
return cpu == resident_cpu;
}
static int cpu_psci_cpu_disable(unsigned int cpu)
{
/* Fail early if we don't have CPU_OFF support */
......
......@@ -46,6 +46,7 @@
#include <linux/of_platform.h>
#include <linux/efi.h>
#include <linux/personality.h>
#include <linux/psci.h>
#include <asm/acpi.h>
#include <asm/fixmap.h>
......@@ -61,7 +62,6 @@
#include <asm/tlbflush.h>
#include <asm/traps.h>
#include <asm/memblock.h>
#include <asm/psci.h>
#include <asm/efi.h>
#include <asm/virt.h>
#include <asm/xen/hypervisor.h>
......
......@@ -176,6 +176,8 @@ source "drivers/powercap/Kconfig"
source "drivers/mcb/Kconfig"
source "drivers/perf/Kconfig"
source "drivers/ras/Kconfig"
source "drivers/thunderbolt/Kconfig"
......
......@@ -161,6 +161,7 @@ obj-$(CONFIG_NTB) += ntb/
obj-$(CONFIG_FMC) += fmc/
obj-$(CONFIG_POWERCAP) += powercap/
obj-$(CONFIG_MCB) += mcb/
obj-$(CONFIG_PERF_EVENTS) += perf/
obj-$(CONFIG_RAS) += ras/
obj-$(CONFIG_THUNDERBOLT) += thunderbolt/
obj-$(CONFIG_CORESIGHT) += hwtracing/coresight/
......
......@@ -25,16 +25,21 @@
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/psci.h>
#include <asm/cpuidle.h>
#include <asm/suspend.h>
#include <asm/psci.h>
#include <uapi/linux/psci.h>
#define CALXEDA_IDLE_PARAM \
((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \
(0 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \
(PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT))
static int calxeda_idle_finish(unsigned long val)
{
const struct psci_power_state ps = {
.type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
};
return psci_ops.cpu_suspend(ps, __pa(cpu_resume));
return psci_ops.cpu_suspend(CALXEDA_IDLE_PARAM, __pa(cpu_resume));
}
static int calxeda_pwrdown_idle(struct cpuidle_device *dev,
......
......@@ -5,6 +5,9 @@
menu "Firmware Drivers"
config ARM_PSCI_FW
bool
config EDD
tristate "BIOS Enhanced Disk Drive calls determine boot disk"
depends on X86
......
#
# Makefile for the linux kernel.
#
obj-$(CONFIG_ARM_PSCI_FW) += psci.o
obj-$(CONFIG_DMI) += dmi_scan.o
obj-$(CONFIG_DMI_SYSFS) += dmi-sysfs.o
obj-$(CONFIG_EDD) += edd.o
......
......@@ -8,39 +8,63 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Copyright (C) 2012 ARM Limited
*
* Author: Will Deacon <will.deacon@arm.com>
* Copyright (C) 2015 ARM Limited
*/
#define pr_fmt(fmt) "psci: " fmt
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/linkage.h>
#include <linux/of.h>
#include <linux/reboot.h>
#include <linux/pm.h>
#include <linux/printk.h>
#include <linux/psci.h>
#include <linux/reboot.h>
#include <uapi/linux/psci.h>
#include <asm/compiler.h>
#include <asm/errno.h>
#include <asm/psci.h>
#include <asm/cputype.h>
#include <asm/system_misc.h>
#include <asm/smp_plat.h>
struct psci_operations psci_ops;
/*
* While a 64-bit OS can make calls with SMC32 calling conventions, for some
* calls it is necessary to use SMC64 to pass or return 64-bit values. For such
* calls PSCI_0_2_FN_NATIVE(x) will choose the appropriate (native-width)
* function ID.
*/
#ifdef CONFIG_64BIT
#define PSCI_0_2_FN_NATIVE(name) PSCI_0_2_FN64_##name
#else
#define PSCI_0_2_FN_NATIVE(name) PSCI_0_2_FN_##name
#endif
static int (*invoke_psci_fn)(u32, u32, u32, u32);
typedef int (*psci_initcall_t)(const struct device_node *);
/*
* The CPU any Trusted OS is resident on. The trusted OS may reject CPU_OFF
* calls to its resident CPU, so we must avoid issuing those. We never migrate
* a Trusted OS even if it claims to be capable of migration -- doing so will
* require cooperation with a Trusted OS driver.
*/
static int resident_cpu = -1;
bool psci_tos_resident_on(int cpu)
{
return cpu == resident_cpu;
}
struct psci_operations psci_ops;
asmlinkage int __invoke_psci_fn_hvc(u32, u32, u32, u32);
asmlinkage int __invoke_psci_fn_smc(u32, u32, u32, u32);
typedef unsigned long (psci_fn)(unsigned long, unsigned long,
unsigned long, unsigned long);
asmlinkage psci_fn __invoke_psci_fn_hvc;
asmlinkage psci_fn __invoke_psci_fn_smc;
static psci_fn *invoke_psci_fn;
enum psci_function {
PSCI_FN_CPU_SUSPEND,
PSCI_FN_CPU_ON,
PSCI_FN_CPU_OFF,
PSCI_FN_MIGRATE,
PSCI_FN_AFFINITY_INFO,
PSCI_FN_MIGRATE_INFO_TYPE,
PSCI_FN_MAX,
};
......@@ -62,44 +86,28 @@ static int psci_to_linux_errno(int errno)
return -EINVAL;
}
static u32 psci_power_state_pack(struct psci_power_state state)
static u32 psci_get_version(void)
{
return ((state.id << PSCI_0_2_POWER_STATE_ID_SHIFT)
& PSCI_0_2_POWER_STATE_ID_MASK) |
((state.type << PSCI_0_2_POWER_STATE_TYPE_SHIFT)
& PSCI_0_2_POWER_STATE_TYPE_MASK) |
((state.affinity_level << PSCI_0_2_POWER_STATE_AFFL_SHIFT)
& PSCI_0_2_POWER_STATE_AFFL_MASK);
return invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
}
static int psci_get_version(void)
static int psci_cpu_suspend(u32 state, unsigned long entry_point)
{
int err;
err = invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
return err;
}
static int psci_cpu_suspend(struct psci_power_state state,
unsigned long entry_point)
{
int err;
u32 fn, power_state;
u32 fn;
fn = psci_function_id[PSCI_FN_CPU_SUSPEND];
power_state = psci_power_state_pack(state);
err = invoke_psci_fn(fn, power_state, entry_point, 0);
err = invoke_psci_fn(fn, state, entry_point, 0);
return psci_to_linux_errno(err);
}
static int psci_cpu_off(struct psci_power_state state)
static int psci_cpu_off(u32 state)
{
int err;
u32 fn, power_state;
u32 fn;
fn = psci_function_id[PSCI_FN_CPU_OFF];
power_state = psci_power_state_pack(state);
err = invoke_psci_fn(fn, power_state, 0, 0);
err = invoke_psci_fn(fn, state, 0, 0);
return psci_to_linux_errno(err);
}
......@@ -126,22 +134,19 @@ static int psci_migrate(unsigned long cpuid)
static int psci_affinity_info(unsigned long target_affinity,
unsigned long lowest_affinity_level)
{
int err;
u32 fn;
fn = psci_function_id[PSCI_FN_AFFINITY_INFO];
err = invoke_psci_fn(fn, target_affinity, lowest_affinity_level, 0);
return err;
return invoke_psci_fn(PSCI_0_2_FN_NATIVE(AFFINITY_INFO),
target_affinity, lowest_affinity_level, 0);
}
static int psci_migrate_info_type(void)
{
int err;
u32 fn;
return invoke_psci_fn(PSCI_0_2_FN_MIGRATE_INFO_TYPE, 0, 0, 0);
}
fn = psci_function_id[PSCI_FN_MIGRATE_INFO_TYPE];
err = invoke_psci_fn(fn, 0, 0, 0);
return err;
static unsigned long psci_migrate_info_up_cpu(void)
{
return invoke_psci_fn(PSCI_0_2_FN_NATIVE(MIGRATE_INFO_UP_CPU),
0, 0, 0);
}
static int get_set_conduit_method(struct device_node *np)
......@@ -177,61 +182,115 @@ static void psci_sys_poweroff(void)
}
/*
* PSCI Function IDs for v0.2+ are well defined so use
* standard values.
* Detect the presence of a resident Trusted OS which may cause CPU_OFF to
* return DENIED (which would be fatal).
*/
static int psci_0_2_init(struct device_node *np)
static void __init psci_init_migrate(void)
{
int err, ver;
unsigned long cpuid;
int type, cpu = -1;
err = get_set_conduit_method(np);
type = psci_ops.migrate_info_type();
if (err)
goto out_put_node;
if (type == PSCI_0_2_TOS_MP) {
pr_info("Trusted OS migration not required\n");
return;
}
ver = psci_get_version();
if (type == PSCI_RET_NOT_SUPPORTED) {
pr_info("MIGRATE_INFO_TYPE not supported.\n");
return;
}
if (ver == PSCI_RET_NOT_SUPPORTED) {
/* PSCI v0.2 mandates implementation of PSCI_ID_VERSION. */
pr_err("PSCI firmware does not comply with the v0.2 spec.\n");
err = -EOPNOTSUPP;
goto out_put_node;
} else {
pr_info("PSCIv%d.%d detected in firmware.\n",
PSCI_VERSION_MAJOR(ver),
PSCI_VERSION_MINOR(ver));
if (PSCI_VERSION_MAJOR(ver) == 0 &&
PSCI_VERSION_MINOR(ver) < 2) {
err = -EINVAL;
pr_err("Conflicting PSCI version detected.\n");
goto out_put_node;
}
if (type != PSCI_0_2_TOS_UP_MIGRATE &&
type != PSCI_0_2_TOS_UP_NO_MIGRATE) {
pr_err("MIGRATE_INFO_TYPE returned unknown type (%d)\n", type);
return;
}
cpuid = psci_migrate_info_up_cpu();
if (cpuid & ~MPIDR_HWID_BITMASK) {
pr_warn("MIGRATE_INFO_UP_CPU reported invalid physical ID (0x%lx)\n",
cpuid);
return;
}
cpu = get_logical_index(cpuid);
resident_cpu = cpu >= 0 ? cpu : -1;
pr_info("Trusted OS resident on physical CPU 0x%lx\n", cpuid);
}
static void __init psci_0_2_set_functions(void)
{
pr_info("Using standard PSCI v0.2 function IDs\n");
psci_function_id[PSCI_FN_CPU_SUSPEND] = PSCI_0_2_FN_CPU_SUSPEND;
psci_function_id[PSCI_FN_CPU_SUSPEND] = PSCI_0_2_FN_NATIVE(CPU_SUSPEND);
psci_ops.cpu_suspend = psci_cpu_suspend;
psci_function_id[PSCI_FN_CPU_OFF] = PSCI_0_2_FN_CPU_OFF;
psci_ops.cpu_off = psci_cpu_off;
psci_function_id[PSCI_FN_CPU_ON] = PSCI_0_2_FN_CPU_ON;
psci_function_id[PSCI_FN_CPU_ON] = PSCI_0_2_FN_NATIVE(CPU_ON);
psci_ops.cpu_on = psci_cpu_on;
psci_function_id[PSCI_FN_MIGRATE] = PSCI_0_2_FN_MIGRATE;
psci_function_id[PSCI_FN_MIGRATE] = PSCI_0_2_FN_NATIVE(MIGRATE);
psci_ops.migrate = psci_migrate;
psci_function_id[PSCI_FN_AFFINITY_INFO] = PSCI_0_2_FN_AFFINITY_INFO;
psci_ops.affinity_info = psci_affinity_info;
psci_function_id[PSCI_FN_MIGRATE_INFO_TYPE] =
PSCI_0_2_FN_MIGRATE_INFO_TYPE;
psci_ops.migrate_info_type = psci_migrate_info_type;
arm_pm_restart = psci_sys_reset;
pm_power_off = psci_sys_poweroff;
}
/*
* Probe function for PSCI firmware versions >= 0.2
*/
static int __init psci_probe(void)
{
u32 ver = psci_get_version();
pr_info("PSCIv%d.%d detected in firmware.\n",
PSCI_VERSION_MAJOR(ver),
PSCI_VERSION_MINOR(ver));
if (PSCI_VERSION_MAJOR(ver) == 0 && PSCI_VERSION_MINOR(ver) < 2) {
pr_err("Conflicting PSCI version detected.\n");
return -EINVAL;
}
psci_0_2_set_functions();
psci_init_migrate();
return 0;
}
typedef int (*psci_initcall_t)(const struct device_node *);
/*
* PSCI init function for PSCI versions >=0.2
*
* Probe based on PSCI PSCI_VERSION function
*/
static int __init psci_0_2_init(struct device_node *np)
{
int err;
err = get_set_conduit_method(np);
if (err)
goto out_put_node;
/*
* Starting with v0.2, the PSCI specification introduced a call
* (PSCI_VERSION) that allows probing the firmware version, so
* that PSCI function IDs and version specific initialization
* can be carried out according to the specific version reported
* by firmware
*/
err = psci_probe();
out_put_node:
of_node_put(np);
......@@ -241,7 +300,7 @@ static int psci_0_2_init(struct device_node *np)
/*
* PSCI < v0.2 get PSCI Function IDs via DT.
*/
static int psci_0_1_init(struct device_node *np)
static int __init psci_0_1_init(struct device_node *np)
{
u32 id;
int err;
......@@ -279,21 +338,45 @@ static int psci_0_1_init(struct device_node *np)
}
static const struct of_device_id psci_of_match[] __initconst = {
{ .compatible = "arm,psci", .data = psci_0_1_init},
{ .compatible = "arm,psci-0.2", .data = psci_0_2_init},
{ .compatible = "arm,psci", .data = psci_0_1_init},
{ .compatible = "arm,psci-0.2", .data = psci_0_2_init},
{},
};
int __init psci_init(void)
int __init psci_dt_init(void)
{
struct device_node *np;
const struct of_device_id *matched_np;
psci_initcall_t init_fn;
np = of_find_matching_node_and_match(NULL, psci_of_match, &matched_np);
if (!np)
return -ENODEV;
init_fn = (psci_initcall_t)matched_np->data;
return init_fn(np);
}
#ifdef CONFIG_ACPI
/*
* We use PSCI 0.2+ when ACPI is deployed on ARM64 and it's
* explicitly clarified in SBBR
*/
int __init psci_acpi_init(void)
{
if (!acpi_psci_present()) {
pr_info("is not implemented in ACPI.\n");
return -EOPNOTSUPP;
}
pr_info("probing for conduit method from ACPI.\n");
if (acpi_psci_use_hvc())
invoke_psci_fn = __invoke_psci_fn_hvc;
else
invoke_psci_fn = __invoke_psci_fn_smc;
return psci_probe();
}
#endif
#
# Performance Monitor Drivers
#
menu "Performance monitor support"
config ARM_PMU
depends on PERF_EVENTS && ARM
bool "ARM PMU framework"
default y
help
Say y if you want to use CPU performance monitors on ARM-based
systems.
endmenu
obj-$(CONFIG_ARM_PMU) += arm_pmu.o
......@@ -15,7 +15,8 @@
#include <linux/cpumask.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
......@@ -24,7 +25,6 @@
#include <asm/cputype.h>
#include <asm/irq_regs.h>
#include <asm/pmu.h>
static int
armpmu_map_cache_event(const unsigned (*cache_map)
......@@ -790,54 +790,77 @@ static int probe_current_pmu(struct arm_pmu *pmu,
static int of_pmu_irq_cfg(struct arm_pmu *pmu)
{
int i, irq, *irqs;
int *irqs, i = 0;
bool using_spi = false;
struct platform_device *pdev = pmu->plat_device;
/* Don't bother with PPIs; they're already affine */
irq = platform_get_irq(pdev, 0);
if (irq >= 0 && irq_is_percpu(irq)) {
cpumask_setall(&pmu->supported_cpus);
return 0;
}
irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL);
if (!irqs)
return -ENOMEM;
for (i = 0; i < pdev->num_resources; ++i) {
do {
struct device_node *dn;
int cpu;
int cpu, irq;
dn = of_parse_phandle(pdev->dev.of_node, "interrupt-affinity",
i);
if (!dn) {
pr_warn("Failed to parse %s/interrupt-affinity[%d]\n",
of_node_full_name(pdev->dev.of_node), i);
/* See if we have an affinity entry */
dn = of_parse_phandle(pdev->dev.of_node, "interrupt-affinity", i);
if (!dn)
break;
/* Check the IRQ type and prohibit a mix of PPIs and SPIs */
irq = platform_get_irq(pdev, i);
if (irq >= 0) {
bool spi = !irq_is_percpu(irq);
if (i > 0 && spi != using_spi) {
pr_err("PPI/SPI IRQ type mismatch for %s!\n",
dn->name);
kfree(irqs);
return -EINVAL;
}
using_spi = spi;
}
/* Now look up the logical CPU number */
for_each_possible_cpu(cpu)
if (arch_find_n_match_cpu_physical_id(dn, cpu, NULL))
if (dn == of_cpu_device_node_get(cpu))
break;
if (cpu >= nr_cpu_ids) {
pr_warn("Failed to find logical CPU for %s\n",
dn->name);
of_node_put(dn);
cpumask_setall(&pmu->supported_cpus);
break;
}
of_node_put(dn);
irqs[i] = cpu;
/* For SPIs, we need to track the affinity per IRQ */
if (using_spi) {
if (i >= pdev->num_resources) {
of_node_put(dn);
break;
}
irqs[i] = cpu;
}
/* Keep track of the CPUs containing this PMU type */
cpumask_set_cpu(cpu, &pmu->supported_cpus);
}
of_node_put(dn);
i++;
} while (1);
if (i == pdev->num_resources) {
/* If we didn't manage to parse anything, claim to support all CPUs */
if (cpumask_weight(&pmu->supported_cpus) == 0)
cpumask_setall(&pmu->supported_cpus);
/* If we matched up the IRQ affinities, use them to route the SPIs */
if (using_spi && i == pdev->num_resources)
pmu->irq_affinity = irqs;
} else {
else
kfree(irqs);
cpumask_setall(&pmu->supported_cpus);
}
return 0;
}
......
......@@ -30,7 +30,7 @@ struct arm_pmu_platdata {
irq_handler_t pmu_handler);
};
#ifdef CONFIG_HW_PERF_EVENTS
#ifdef CONFIG_ARM_PMU
/*
* The ARMv7 CPU PMU supports up to 32 event counters.
......@@ -149,6 +149,6 @@ int arm_pmu_device_probe(struct platform_device *pdev,
const struct of_device_id *of_table,
const struct pmu_probe_info *probe_table);
#endif /* CONFIG_HW_PERF_EVENTS */
#endif /* CONFIG_ARM_PMU */
#endif /* __ARM_PMU_H__ */
......@@ -8,15 +8,39 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Copyright (C) 2013 ARM Limited
* Copyright (C) 2015 ARM Limited
*/
#ifndef __ASM_PSCI_H
#define __ASM_PSCI_H
#ifndef __LINUX_PSCI_H
#define __LINUX_PSCI_H
#include <linux/init.h>
#include <linux/types.h>
#define PSCI_POWER_STATE_TYPE_STANDBY 0
#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
bool psci_tos_resident_on(int cpu);
struct psci_operations {
int (*cpu_suspend)(u32 state, unsigned long entry_point);
int (*cpu_off)(u32 state);
int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
int (*migrate)(unsigned long cpuid);
int (*affinity_info)(unsigned long target_affinity,
unsigned long lowest_affinity_level);
int (*migrate_info_type)(void);
};
extern struct psci_operations psci_ops;
#if defined(CONFIG_ARM_PSCI_FW)
int __init psci_dt_init(void);
#else
static inline int psci_dt_init(void) { return 0; }
#endif
#ifdef CONFIG_ACPI
#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
int __init psci_acpi_init(void);
bool __init acpi_psci_present(void);
bool __init acpi_psci_use_hvc(void);
......@@ -25,4 +49,4 @@ static inline int psci_acpi_init(void) { return 0; }
static inline bool acpi_psci_present(void) { return false; }
#endif
#endif /* __ASM_PSCI_H */
#endif /* __LINUX_PSCI_H */
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