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.
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>
......@@ -51,19 +53,31 @@ 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);
psci_ops.cpu_off(state);
/* We should never return */
panic("psci: cpu %d failed to shutdown\n", 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)
{
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);
}
static int psci_get_version(void)
static u32 psci_get_version(void)
{
int err;
err = invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
return err;
return invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
}
static int psci_cpu_suspend(struct psci_power_state state,
unsigned long entry_point)
static int psci_cpu_suspend(u32 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;
err = get_set_conduit_method(np);
unsigned long cpuid;
int type, cpu = -1;
if (err)
goto out_put_node;
type = psci_ops.migrate_info_type();
ver = psci_get_version();
if (type == PSCI_0_2_TOS_MP) {
pr_info("Trusted OS migration not required\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 (type == PSCI_RET_NOT_SUPPORTED) {
pr_info("MIGRATE_INFO_TYPE not supported.\n");
return;
}
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;
......@@ -284,16 +343,40 @@ static const struct of_device_id psci_of_match[] __initconst = {
{},
};
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);
/* 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;
cpumask_set_cpu(cpu, &pmu->supported_cpus);
}
if (i == pdev->num_resources) {
/* Keep track of the CPUs containing this PMU type */
cpumask_set_cpu(cpu, &pmu->supported_cpus);
of_node_put(dn);
i++;
} while (1);
/* 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 */
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment