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authorLinus Torvalds <torvalds@linux-foundation.org>2016-07-29 13:55:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-29 13:55:30 -0700
commita6408f6cb63ac0958fee7dbce7861ffb540d8a49 (patch)
treec94a835d343974171951e3b805e6bbbb02852ebc /arch
parent1a81a8f2a5918956e214bb718099a89e500e7ec5 (diff)
parent4fae16dffb812f0e0d98a0b2b0856ca48ca63e6c (diff)
downloadlinux-a6408f6cb63ac0958fee7dbce7861ffb540d8a49.tar.bz2
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull smp hotplug updates from Thomas Gleixner: "This is the next part of the hotplug rework. - Convert all notifiers with a priority assigned - Convert all CPU_STARTING/DYING notifiers The final removal of the STARTING/DYING infrastructure will happen when the merge window closes. Another 700 hundred line of unpenetrable maze gone :)" * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits) timers/core: Correct callback order during CPU hot plug leds/trigger/cpu: Move from CPU_STARTING to ONLINE level powerpc/numa: Convert to hotplug state machine arm/perf: Fix hotplug state machine conversion irqchip/armada: Avoid unused function warnings ARC/time: Convert to hotplug state machine clocksource/atlas7: Convert to hotplug state machine clocksource/armada-370-xp: Convert to hotplug state machine clocksource/exynos_mct: Convert to hotplug state machine clocksource/arm_global_timer: Convert to hotplug state machine rcu: Convert rcutree to hotplug state machine KVM/arm/arm64/vgic-new: Convert to hotplug state machine smp/cfd: Convert core to hotplug state machine x86/x2apic: Convert to CPU hotplug state machine profile: Convert to hotplug state machine timers/core: Convert to hotplug state machine hrtimer: Convert to hotplug state machine x86/tboot: Convert to hotplug state machine arm64/armv8 deprecated: Convert to hotplug state machine hwtracing/coresight-etm4x: Convert to hotplug state machine ...
Diffstat (limited to 'arch')
-rw-r--r--arch/arc/kernel/time.c48
-rw-r--r--arch/arm/kernel/smp_twd.c31
-rw-r--r--arch/arm/mach-mvebu/coherency.c19
-rw-r--r--arch/arm/mm/cache-l2x0.c27
-rw-r--r--arch/arm/vfp/vfpmodule.c28
-rw-r--r--arch/arm/xen/enlighten.c41
-rw-r--r--arch/arm64/kernel/armv8_deprecated.c22
-rw-r--r--arch/blackfin/kernel/perf_event.c26
-rw-r--r--arch/metag/kernel/perf/perf_event.c26
-rw-r--r--arch/mips/oprofile/op_model_loongson3.c35
-rw-r--r--arch/powerpc/mm/numa.c48
-rw-r--r--arch/powerpc/perf/core-book3s.c30
-rw-r--r--arch/s390/kernel/perf_cpum_cf.c46
-rw-r--r--arch/s390/kernel/perf_cpum_sf.c45
-rw-r--r--arch/sh/kernel/perf_event.c23
-rw-r--r--arch/x86/entry/vdso/vma.c20
-rw-r--r--arch/x86/events/amd/core.c6
-rw-r--r--arch/x86/events/amd/ibs.c64
-rw-r--r--arch/x86/events/amd/power.c60
-rw-r--r--arch/x86/events/amd/uncore.c122
-rw-r--r--arch/x86/events/core.c103
-rw-r--r--arch/x86/events/intel/core.c4
-rw-r--r--arch/x86/events/intel/cqm.c49
-rw-r--r--arch/x86/events/intel/cstate.c51
-rw-r--r--arch/x86/events/intel/rapl.c84
-rw-r--r--arch/x86/events/intel/uncore.c133
-rw-r--r--arch/x86/kernel/apb_timer.c29
-rw-r--r--arch/x86/kernel/apic/x2apic_cluster.c80
-rw-r--r--arch/x86/kernel/hpet.c69
-rw-r--r--arch/x86/kernel/tboot.c25
-rw-r--r--arch/x86/kvm/x86.c35
-rw-r--r--arch/xtensa/kernel/perf_event.c26
32 files changed, 524 insertions, 931 deletions
diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index 98f22d2eb563..f927b8dc6edd 100644
--- a/arch/arc/kernel/time.c
+++ b/arch/arc/kernel/time.c
@@ -296,30 +296,23 @@ static irqreturn_t timer_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int arc_timer_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
+
+static int arc_timer_starting_cpu(unsigned int cpu)
{
struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
evt->cpumask = cpumask_of(smp_processor_id());
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- clockevents_config_and_register(evt, arc_timer_freq,
- 0, ULONG_MAX);
- enable_percpu_irq(arc_timer_irq, 0);
- break;
- case CPU_DYING:
- disable_percpu_irq(arc_timer_irq);
- break;
- }
-
- return NOTIFY_OK;
+ clockevents_config_and_register(evt, arc_timer_freq, 0, ARC_TIMER_MAX);
+ enable_percpu_irq(arc_timer_irq, 0);
+ return 0;
}
-static struct notifier_block arc_timer_cpu_nb = {
- .notifier_call = arc_timer_cpu_notify,
-};
+static int arc_timer_dying_cpu(unsigned int cpu)
+{
+ disable_percpu_irq(arc_timer_irq);
+ return 0;
+}
/*
* clockevent setup for boot CPU
@@ -329,12 +322,6 @@ static int __init arc_clockevent_setup(struct device_node *node)
struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
int ret;
- ret = register_cpu_notifier(&arc_timer_cpu_nb);
- if (ret) {
- pr_err("Failed to register cpu notifier");
- return ret;
- }
-
arc_timer_irq = irq_of_parse_and_map(node, 0);
if (arc_timer_irq <= 0) {
pr_err("clockevent: missing irq");
@@ -347,11 +334,6 @@ static int __init arc_clockevent_setup(struct device_node *node)
return ret;
}
- evt->irq = arc_timer_irq;
- evt->cpumask = cpumask_of(smp_processor_id());
- clockevents_config_and_register(evt, arc_timer_freq,
- 0, ARC_TIMER_MAX);
-
/* Needs apriori irq_set_percpu_devid() done in intc map function */
ret = request_percpu_irq(arc_timer_irq, timer_irq_handler,
"Timer0 (per-cpu-tick)", evt);
@@ -360,8 +342,14 @@ static int __init arc_clockevent_setup(struct device_node *node)
return ret;
}
- enable_percpu_irq(arc_timer_irq, 0);
-
+ ret = cpuhp_setup_state(CPUHP_AP_ARC_TIMER_STARTING,
+ "AP_ARC_TIMER_STARTING",
+ arc_timer_starting_cpu,
+ arc_timer_dying_cpu);
+ if (ret) {
+ pr_err("Failed to setup hotplug state");
+ return ret;
+ }
return 0;
}
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index b6ec65e68009..02d5e5e8d44c 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -310,24 +310,17 @@ static void twd_timer_setup(void)
enable_percpu_irq(clk->irq, 0);
}
-static int twd_timer_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
+static int twd_timer_starting_cpu(unsigned int cpu)
{
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- twd_timer_setup();
- break;
- case CPU_DYING:
- twd_timer_stop();
- break;
- }
-
- return NOTIFY_OK;
+ twd_timer_setup();
+ return 0;
}
-static struct notifier_block twd_timer_cpu_nb = {
- .notifier_call = twd_timer_cpu_notify,
-};
+static int twd_timer_dying_cpu(unsigned int cpu)
+{
+ twd_timer_stop();
+ return 0;
+}
static int __init twd_local_timer_common_register(struct device_node *np)
{
@@ -345,9 +338,9 @@ static int __init twd_local_timer_common_register(struct device_node *np)
goto out_free;
}
- err = register_cpu_notifier(&twd_timer_cpu_nb);
- if (err)
- goto out_irq;
+ cpuhp_setup_state_nocalls(CPUHP_AP_ARM_TWD_STARTING,
+ "AP_ARM_TWD_STARTING",
+ twd_timer_starting_cpu, twd_timer_dying_cpu);
twd_get_clock(np);
if (!of_property_read_bool(np, "always-on"))
@@ -365,8 +358,6 @@ static int __init twd_local_timer_common_register(struct device_node *np)
return 0;
-out_irq:
- free_percpu_irq(twd_ppi, twd_evt);
out_free:
iounmap(twd_base);
twd_base = NULL;
diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c
index e80f0dde2189..ae2a018b9305 100644
--- a/arch/arm/mach-mvebu/coherency.c
+++ b/arch/arm/mach-mvebu/coherency.c
@@ -111,20 +111,12 @@ static struct notifier_block mvebu_hwcc_pci_nb __maybe_unused = {
.notifier_call = mvebu_hwcc_notifier,
};
-static int armada_xp_clear_shared_l2_notifier_func(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
+static int armada_xp_clear_l2_starting(unsigned int cpu)
{
- if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
- armada_xp_clear_shared_l2();
-
- return NOTIFY_OK;
+ armada_xp_clear_shared_l2();
+ return 0;
}
-static struct notifier_block armada_xp_clear_shared_l2_notifier = {
- .notifier_call = armada_xp_clear_shared_l2_notifier_func,
- .priority = 100,
-};
-
static void __init armada_370_coherency_init(struct device_node *np)
{
struct resource res;
@@ -155,8 +147,9 @@ static void __init armada_370_coherency_init(struct device_node *np)
of_node_put(cpu_config_np);
- register_cpu_notifier(&armada_xp_clear_shared_l2_notifier);
-
+ cpuhp_setup_state_nocalls(CPUHP_AP_ARM_MVEBU_COHERENCY,
+ "AP_ARM_MVEBU_COHERENCY",
+ armada_xp_clear_l2_starting, NULL);
exit:
set_cpu_coherent();
}
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index c61996c256cc..cc12905ae6f8 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -597,17 +597,16 @@ static void l2c310_configure(void __iomem *base)
L310_POWER_CTRL);
}
-static int l2c310_cpu_enable_flz(struct notifier_block *nb, unsigned long act, void *data)
+static int l2c310_starting_cpu(unsigned int cpu)
{
- switch (act & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- set_auxcr(get_auxcr() | BIT(3) | BIT(2) | BIT(1));
- break;
- case CPU_DYING:
- set_auxcr(get_auxcr() & ~(BIT(3) | BIT(2) | BIT(1)));
- break;
- }
- return NOTIFY_OK;
+ set_auxcr(get_auxcr() | BIT(3) | BIT(2) | BIT(1));
+ return 0;
+}
+
+static int l2c310_dying_cpu(unsigned int cpu)
+{
+ set_auxcr(get_auxcr() & ~(BIT(3) | BIT(2) | BIT(1)));
+ return 0;
}
static void __init l2c310_enable(void __iomem *base, unsigned num_lock)
@@ -678,10 +677,10 @@ static void __init l2c310_enable(void __iomem *base, unsigned num_lock)
power_ctrl & L310_STNDBY_MODE_EN ? "en" : "dis");
}
- if (aux & L310_AUX_CTRL_FULL_LINE_ZERO) {
- set_auxcr(get_auxcr() | BIT(3) | BIT(2) | BIT(1));
- cpu_notifier(l2c310_cpu_enable_flz, 0);
- }
+ if (aux & L310_AUX_CTRL_FULL_LINE_ZERO)
+ cpuhp_setup_state(CPUHP_AP_ARM_L2X0_STARTING,
+ "AP_ARM_L2X0_STARTING", l2c310_starting_cpu,
+ l2c310_dying_cpu);
}
static void __init l2c310_fixup(void __iomem *base, u32 cache_id,
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 73085d3482ed..da0b33deba6d 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -643,19 +643,19 @@ int vfp_restore_user_hwstate(struct user_vfp __user *ufp,
* hardware state at every thread switch. We clear our held state when
* a CPU has been killed, indicating that the VFP hardware doesn't contain
* a threads VFP state. When a CPU starts up, we re-enable access to the
- * VFP hardware.
- *
- * Both CPU_DYING and CPU_STARTING are called on the CPU which
+ * VFP hardware. The callbacks below are called on the CPU which
* is being offlined/onlined.
*/
-static int vfp_hotplug(struct notifier_block *b, unsigned long action,
- void *hcpu)
+static int vfp_dying_cpu(unsigned int cpu)
{
- if (action == CPU_DYING || action == CPU_DYING_FROZEN)
- vfp_current_hw_state[(long)hcpu] = NULL;
- else if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
- vfp_enable(NULL);
- return NOTIFY_OK;
+ vfp_force_reload(cpu, current_thread_info());
+ return 0;
+}
+
+static int vfp_starting_cpu(unsigned int unused)
+{
+ vfp_enable(NULL);
+ return 0;
}
void vfp_kmode_exception(void)
@@ -732,6 +732,10 @@ static int __init vfp_init(void)
unsigned int vfpsid;
unsigned int cpu_arch = cpu_architecture();
+ /*
+ * Enable the access to the VFP on all online CPUs so the
+ * following test on FPSID will succeed.
+ */
if (cpu_arch >= CPU_ARCH_ARMv6)
on_each_cpu(vfp_enable, NULL, 1);
@@ -794,7 +798,9 @@ static int __init vfp_init(void)
VFP_arch = (vfpsid & FPSID_ARCH_MASK) >> FPSID_ARCH_BIT;
}
- hotcpu_notifier(vfp_hotplug, 0);
+ cpuhp_setup_state_nocalls(CPUHP_AP_ARM_VFP_STARTING,
+ "AP_ARM_VFP_STARTING", vfp_starting_cpu,
+ vfp_dying_cpu);
vfp_vector = vfp_support_entry;
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 0bea3d271f6e..b0b82f5ea338 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -153,12 +153,11 @@ static struct notifier_block xen_pvclock_gtod_notifier = {
.notifier_call = xen_pvclock_gtod_notify,
};
-static void xen_percpu_init(void)
+static int xen_starting_cpu(unsigned int cpu)
{
struct vcpu_register_vcpu_info info;
struct vcpu_info *vcpup;
int err;
- int cpu = get_cpu();
/*
* VCPUOP_register_vcpu_info cannot be called twice for the same
@@ -186,7 +185,13 @@ static void xen_percpu_init(void)
after_register_vcpu_info:
enable_percpu_irq(xen_events_irq, 0);
- put_cpu();
+ return 0;
+}
+
+static int xen_dying_cpu(unsigned int cpu)
+{
+ disable_percpu_irq(xen_events_irq);
+ return 0;
}
static void xen_restart(enum reboot_mode reboot_mode, const char *cmd)
@@ -205,28 +210,6 @@ static void xen_power_off(void)
BUG_ON(rc);
}
-static int xen_cpu_notification(struct notifier_block *self,
- unsigned long action,
- void *hcpu)
-{
- switch (action) {
- case CPU_STARTING:
- xen_percpu_init();
- break;
- case CPU_DYING:
- disable_percpu_irq(xen_events_irq);
- break;
- default:
- break;
- }
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block xen_cpu_notifier = {
- .notifier_call = xen_cpu_notification,
-};
-
static irqreturn_t xen_arm_callback(int irq, void *arg)
{
xen_hvm_evtchn_do_upcall();
@@ -425,16 +408,14 @@ static int __init xen_guest_init(void)
return -EINVAL;
}
- xen_percpu_init();
-
- register_cpu_notifier(&xen_cpu_notifier);
-
xen_time_setup_guest();
if (xen_initial_domain())
pvclock_gtod_register_notifier(&xen_pvclock_gtod_notifier);
- return 0;
+ return cpuhp_setup_state(CPUHP_AP_ARM_XEN_STARTING,
+ "AP_ARM_XEN_STARTING", xen_starting_cpu,
+ xen_dying_cpu);
}
early_initcall(xen_guest_init);
diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c
index 5f72475e2e3b..42ffdb54e162 100644
--- a/arch/arm64/kernel/armv8_deprecated.c
+++ b/arch/arm64/kernel/armv8_deprecated.c
@@ -121,7 +121,7 @@ static int run_all_cpu_set_hw_mode(struct insn_emulation *insn, bool enable)
* 0 - If all the hooks ran successfully.
* -EINVAL - At least one hook is not supported by the CPU.
*/
-static int run_all_insn_set_hw_mode(unsigned long cpu)
+static int run_all_insn_set_hw_mode(unsigned int cpu)
{
int rc = 0;
unsigned long flags;
@@ -131,7 +131,7 @@ static int run_all_insn_set_hw_mode(unsigned long cpu)
list_for_each_entry(insn, &insn_emulation, node) {
bool enable = (insn->current_mode == INSN_HW);
if (insn->ops->set_hw_mode && insn->ops->set_hw_mode(enable)) {
- pr_warn("CPU[%ld] cannot support the emulation of %s",
+ pr_warn("CPU[%u] cannot support the emulation of %s",
cpu, insn->ops->name);
rc = -EINVAL;
}
@@ -611,20 +611,6 @@ static struct insn_emulation_ops setend_ops = {
.set_hw_mode = setend_set_hw_mode,
};
-static int insn_cpu_hotplug_notify(struct notifier_block *b,
- unsigned long action, void *hcpu)
-{
- int rc = 0;
- if ((action & ~CPU_TASKS_FROZEN) == CPU_STARTING)
- rc = run_all_insn_set_hw_mode((unsigned long)hcpu);
-
- return notifier_from_errno(rc);
-}
-
-static struct notifier_block insn_cpu_hotplug_notifier = {
- .notifier_call = insn_cpu_hotplug_notify,
-};
-
/*
* Invoked as late_initcall, since not needed before init spawned.
*/
@@ -643,7 +629,9 @@ static int __init armv8_deprecated_init(void)
pr_info("setend instruction emulation is not supported on the system");
}
- register_cpu_notifier(&insn_cpu_hotplug_notifier);
+ cpuhp_setup_state_nocalls(CPUHP_AP_ARM64_ISNDEP_STARTING,
+ "AP_ARM64_ISNDEP_STARTING",
+ run_all_insn_set_hw_mode, NULL);
register_insn_emulation_sysctl(ctl_abi);
return 0;
diff --git a/arch/blackfin/kernel/perf_event.c b/arch/blackfin/kernel/perf_event.c
index 170d786807c4..6355e97d22b9 100644
--- a/arch/blackfin/kernel/perf_event.c
+++ b/arch/blackfin/kernel/perf_event.c
@@ -453,29 +453,13 @@ static struct pmu pmu = {
.read = bfin_pmu_read,
};
-static void bfin_pmu_setup(int cpu)
+static int bfin_pmu_prepare_cpu(unsigned int cpu)
{
struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
+ bfin_write_PFCTL(0);
memset(cpuhw, 0, sizeof(struct cpu_hw_events));
-}
-
-static int
-bfin_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
-{
- unsigned int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- bfin_write_PFCTL(0);
- bfin_pmu_setup(cpu);
- break;
-
- default:
- break;
- }
-
- return NOTIFY_OK;
+ return 0;
}
static int __init bfin_pmu_init(void)
@@ -491,8 +475,8 @@ static int __init bfin_pmu_init(void)
ret = perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
if (!ret)
- perf_cpu_notifier(bfin_pmu_notifier);
-
+ cpuhp_setup_state(CPUHP_PERF_BFIN, "PERF_BFIN",
+ bfin_pmu_prepare_cpu, NULL);
return ret;
}
early_initcall(bfin_pmu_init);
diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c
index 33a365f924be..052cba23708c 100644
--- a/arch/metag/kernel/perf/perf_event.c
+++ b/arch/metag/kernel/perf/perf_event.c
@@ -806,25 +806,16 @@ static struct metag_pmu _metag_pmu = {
};
/* PMU CPU hotplug notifier */
-static int metag_pmu_cpu_notify(struct notifier_block *b, unsigned long action,
- void *hcpu)
+static int metag_pmu_starting_cpu(unsigned int cpu)
{
- unsigned int cpu = (unsigned int)hcpu;
struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
- if ((action & ~CPU_TASKS_FROZEN) != CPU_STARTING)
- return NOTIFY_DONE;
-
memset(cpuc, 0, sizeof(struct cpu_hw_events));
raw_spin_lock_init(&cpuc->pmu_lock);
- return NOTIFY_OK;
+ return 0;
}
-static struct notifier_block metag_pmu_notifier = {
- .notifier_call = metag_pmu_cpu_notify,
-};
-
/* PMU Initialisation */
static int __init init_hw_perf_events(void)
{
@@ -876,16 +867,13 @@ static int __init init_hw_perf_events(void)
metag_out32(0, PERF_COUNT(0));
metag_out32(0, PERF_COUNT(1));
- for_each_possible_cpu(cpu) {
- struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
+ cpuhp_setup_state(CPUHP_AP_PERF_METAG_STARTING,
+ "AP_PERF_METAG_STARTING", metag_pmu_starting_cpu,
+ NULL);
- memset(cpuc, 0, sizeof(struct cpu_hw_events));
- raw_spin_lock_init(&cpuc->pmu_lock);
- }
-
- register_cpu_notifier(&metag_pmu_notifier);
ret = perf_pmu_register(&pmu, metag_pmu->name, PERF_TYPE_RAW);
-out:
+ if (ret)
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_METAG_STARTING);
return ret;
}
early_initcall(init_hw_perf_events);
diff --git a/arch/mips/oprofile/op_model_loongson3.c b/arch/mips/oprofile/op_model_loongson3.c
index 8bcf7fc40f0d..85f3ee4ab456 100644
--- a/arch/mips/oprofile/op_model_loongson3.c
+++ b/arch/mips/oprofile/op_model_loongson3.c
@@ -168,33 +168,26 @@ static int loongson3_perfcount_handler(void)
return handled;
}
-static int loongson3_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
+static int loongson3_starting_cpu(unsigned int cpu)
{
- switch (action) {
- case CPU_STARTING:
- case CPU_STARTING_FROZEN:
- write_c0_perflo1(reg.control1);
- write_c0_perflo2(reg.control2);
- break;
- case CPU_DYING:
- case CPU_DYING_FROZEN:
- write_c0_perflo1(0xc0000000);
- write_c0_perflo2(0x40000000);
- break;
- }
-
- return NOTIFY_OK;
+ write_c0_perflo1(reg.control1);
+ write_c0_perflo2(reg.control2);
+ return 0;
}
-static struct notifier_block loongson3_notifier_block = {
- .notifier_call = loongson3_cpu_callback
-};
+static int loongson3_dying_cpu(unsigned int cpu)
+{
+ write_c0_perflo1(0xc0000000);
+ write_c0_perflo2(0x40000000);
+ return 0;
+}
static int __init loongson3_init(void)
{
on_each_cpu(reset_counters, NULL, 1);
- register_hotcpu_notifier(&loongson3_notifier_block);
+ cpuhp_setup_state_nocalls(CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
+ "AP_MIPS_OP_LOONGSON3_STARTING",
+ loongson3_starting_cpu, loongson3_dying_cpu);
save_perf_irq = perf_irq;
perf_irq = loongson3_perfcount_handler;
@@ -204,7 +197,7 @@ static int __init loongson3_init(void)
static void loongson3_exit(void)
{
on_each_cpu(reset_counters, NULL, 1);
- unregister_hotcpu_notifier(&loongson3_notifier_block);
+ cpuhp_remove_state_nocalls(CPUHP_AP_MIPS_OP_LOONGSON3_STARTING);
perf_irq = save_perf_irq;
}
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 669a15e7fa76..6dc07ddbfd04 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -581,30 +581,22 @@ static void verify_cpu_node_mapping(int cpu, int node)
}
}
-static int cpu_numa_callback(struct notifier_block *nfb, unsigned long action,
- void *hcpu)
+/* Must run before sched domains notifier. */
+static int ppc_numa_cpu_prepare(unsigned int cpu)
{
- unsigned long lcpu = (unsigned long)hcpu;
- int ret = NOTIFY_DONE, nid;
+ int nid;
- switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
- nid = numa_setup_cpu(lcpu);
- verify_cpu_node_mapping((int)lcpu, nid);
- ret = NOTIFY_OK;
- break;
+ nid = numa_setup_cpu(cpu);
+ verify_cpu_node_mapping(cpu, nid);
+ return 0;
+}
+
+static int ppc_numa_cpu_dead(unsigned int cpu)
+{
#ifdef CONFIG_HOTPLUG_CPU
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- unmap_cpu_from_node(lcpu);
- ret = NOTIFY_OK;
- break;
+ unmap_cpu_from_node(cpu);
#endif
- }
- return ret;
+ return 0;
}
/*
@@ -913,11 +905,6 @@ static void __init dump_numa_memory_topology(void)
}
}
-static struct notifier_block ppc64_numa_nb = {
- .notifier_call = cpu_numa_callback,
- .priority = 1 /* Must run before sched domains notifier. */
-};
-
/* Initialize NODE_DATA for a node on the local memory */
static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn)
{
@@ -985,15 +972,18 @@ void __init initmem_init(void)
setup_node_to_cpumask_map();
reset_numa_cpu_lookup_table();
- register_cpu_notifier(&ppc64_numa_nb);
+
/*
* We need the numa_cpu_lookup_table to be accurate for all CPUs,
* even before we online them, so that we can use cpu_to_{node,mem}
* early in boot, cf. smp_prepare_cpus().
+ * _nocalls() + manual invocation is used because cpuhp is not yet
+ * initialized for the boot CPU.
*/
- for_each_present_cpu(cpu) {
- numa_setup_cpu((unsigned long)cpu);
- }
+ cpuhp_setup_state_nocalls(CPUHP_POWER_NUMA_PREPARE, "POWER_NUMA_PREPARE",
+ ppc_numa_cpu_prepare, ppc_numa_cpu_dead);
+ for_each_present_cpu(cpu)
+ numa_setup_cpu(cpu);
}
static int __init early_numa(char *p)
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 97a1d40d8696..ffd61d55fb25 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -2158,31 +2158,15 @@ static void perf_event_interrupt(struct pt_regs *regs)
irq_exit();
}
-static void power_pmu_setup(int cpu)
+int power_pmu_prepare_cpu(unsigned int cpu)
{
struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
- if (!ppmu)
- return;
- memset(cpuhw, 0, sizeof(*cpuhw));
- cpuhw->mmcr[0] = MMCR0_FC;
-}
-
-static int
-power_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
-{
- unsigned int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- power_pmu_setup(cpu);
- break;
-
- default:
- break;
+ if (ppmu) {
+ memset(cpuhw, 0, sizeof(*cpuhw));
+ cpuhw->mmcr[0] = MMCR0_FC;
}
-
- return NOTIFY_OK;
+ return 0;
}
int register_power_pmu(struct power_pmu *pmu)
@@ -2205,7 +2189,7 @@ int register_power_pmu(struct power_pmu *pmu)
#endif /* CONFIG_PPC64 */
perf_pmu_register(&power_pmu, "cpu", PERF_TYPE_RAW);
- perf_cpu_notifier(power_pmu_notifier);
-
+ cpuhp_setup_state(CPUHP_PERF_POWER, "PERF_POWER",
+ power_pmu_prepare_cpu, NULL);
return 0;
}
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index 7ec63b1d920d..037c2a253ae4 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -664,30 +664,22 @@ static struct pmu cpumf_pmu = {
.cancel_txn = cpumf_pmu_cancel_txn,
};
-static int cpumf_pmu_notifier(struct notifier_block *self, unsigned long action,
- void *hcpu)
+static int cpumf_pmf_setup(unsigned int cpu, int flags)
{
- int flags;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- case CPU_DOWN_FAILED:
- flags = PMC_INIT;
- local_irq_disable();
- setup_pmc_cpu(&flags);
- local_irq_enable();
- break;
- case CPU_DOWN_PREPARE:
- flags = PMC_RELEASE;
- local_irq_disable();
- setup_pmc_cpu(&flags);
- local_irq_enable();
- break;
- default:
- break;
- }
+ local_irq_disable();
+ setup_pmc_cpu(&flags);
+ local_irq_enable();
+ return 0;
+}
+
+static int s390_pmu_online_cpu(unsigned int cpu)
+{
+ return cpumf_pmf_setup(cpu, PMC_INIT);
+}
- return NOTIFY_OK;
+static int s390_pmu_offline_cpu(unsigned int cpu)
+{
+ return cpumf_pmf_setup(cpu, PMC_RELEASE);
}
static int __init cpumf_pmu_init(void)
@@ -707,7 +699,7 @@ static int __init cpumf_pmu_init(void)
if (rc) {
pr_err("Registering for CPU-measurement alerts "
"failed with rc=%i\n", rc);
- goto out;
+ return rc;
}
cpumf_pmu.attr_groups = cpumf_cf_event_group();
@@ -716,10 +708,10 @@ static int __init cpumf_pmu_init(void)
pr_err("Registering the cpum_cf PMU failed with rc=%i\n", rc);
unregister_external_irq(EXT_IRQ_MEASURE_ALERT,
cpumf_measurement_alert);
- goto out;
+ return rc;
}
- perf_cpu_notifier(cpumf_pmu_notifier);
-out:
- return rc;
+ return cpuhp_setup_state(CPUHP_AP_PERF_S390_CF_ONLINE,
+ "AP_PERF_S390_CF_ONLINE",
+ s390_pmu_online_cpu, s390_pmu_offline_cpu);
}
early_initcall(cpumf_pmu_init);
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index 53acf2d76fa9..fcc634c1479a 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -1504,37 +1504,28 @@ static void cpumf_measurement_alert(struct ext_code ext_code,
sf_disable();
}
}
-
-static int cpumf_pmu_notifier(struct notifier_block *self,
- unsigned long action, void *hcpu)
+static int cpusf_pmu_setup(unsigned int cpu, int flags)
{
- int flags;
-
/* Ignore the notification if no events are scheduled on the PMU.
* This might be racy...
*/
if (!atomic_read(&num_events))
- return NOTIFY_OK;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- case CPU_DOWN_FAILED:
- flags = PMC_INIT;
- local_irq_disable();
- setup_pmc_cpu(&flags);
- local_irq_enable();
- break;
- case CPU_DOWN_PREPARE:
- flags = PMC_RELEASE;
- local_irq_disable();
- setup_pmc_cpu(&flags);
- local_irq_enable();
- break;
- default:
- break;
- }
+ return 0;
- return NOTIFY_OK;
+ local_irq_disable();
+ setup_pmc_cpu(&flags);
+ local_irq_enable();
+ return 0;
+}
+
+static int s390_pmu_sf_online_cpu(unsigned int cpu)
+{
+ return cpusf_pmu_setup(cpu, PMC_INIT);
+}
+
+static int s390_pmu_sf_offline_cpu(unsigned int cpu)
+{
+ return cpusf_pmu_setup(cpu, PMC_RELEASE);
}
static int param_get_sfb_size(char *buffer, const struct kernel_param *kp)
@@ -1634,7 +1625,9 @@ static int __init init_cpum_sampling_pmu(void)
cpumf_measurement_alert);
goto out;
}
- perf_cpu_notifier(cpumf_pmu_notifier);
+
+ cpuhp_setup_state(CPUHP_AP_PERF_S390_SF_ONLINE, "AP_PERF_S390_SF_ONLINE",
+ s390_pmu_sf_online_cpu, s390_pmu_sf_offline_cpu);
out:
return err;
}
diff --git a/arch/sh/kernel/perf_event.c b/arch/sh/kernel/perf_event.c
index 4dca18347ee9..ba3269a8304b 100644
--- a/arch/sh/kernel/perf_event.c
+++ b/arch/sh/kernel/perf_event.c
@@ -352,28 +352,12 @@ static struct pmu pmu = {
.read = sh_pmu_read,
};
-static void sh_pmu_setup(int cpu)
+static int sh_pmu_prepare_cpu(unsigned int cpu)
{
struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu);
memset(cpuhw, 0, sizeof(struct cpu_hw_events));
-}
-
-static int
-sh_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
-{
- unsigned int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- sh_pmu_setup(cpu);
- break;
-
- default:
- break;
- }
-
- return NOTIFY_OK;
+ return 0;
}
int register_sh_pmu(struct sh_pmu *_pmu)
@@ -394,6 +378,7 @@ int register_sh_pmu(struct sh_pmu *_pmu)
WARN_ON(_pmu->num_events > MAX_HWEVENTS);
perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
- perf_cpu_notifier(sh_pmu_notifier);
+ cpuhp_setup_state(CPUHP_PERF_SUPERH, "PERF_SUPERH", sh_pmu_prepare_cpu,
+ NULL);
return 0;
}
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index 3329844e3c43..f840766659a8 100644
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -331,15 +331,9 @@ static void vgetcpu_cpu_init(void *arg)
write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_PER_CPU, &d, DESCTYPE_S);
}
-static int
-vgetcpu_cpu_notifier(struct notifier_block *n, unsigned long action, void *arg)
+static int vgetcpu_online(unsigned int cpu)
{
- long cpu = (long)arg;
-
- if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN)
- smp_call_function_single(cpu, vgetcpu_cpu_init, NULL, 1);
-
- return NOTIFY_DONE;
+ return smp_call_function_single(cpu, vgetcpu_cpu_init, NULL, 1);
}
static int __init init_vdso(void)
@@ -350,15 +344,9 @@ static int __init init_vdso(void)
init_vdso_image(&vdso_image_x32);
#endif
- cpu_notifier_register_begin();
-
- on_each_cpu(vgetcpu_cpu_init, NULL, 1);
/* notifier priority > KVM */
- __hotcpu_notifier(vgetcpu_cpu_notifier, 30);
-
- cpu_notifier_register_done();
-
- return 0;
+ return cpuhp_setup_state(CPUHP_AP_X86_VDSO_VMA_ONLINE,
+ "AP_X86_VDSO_VMA_ONLINE", vgetcpu_online, NULL);
}
subsys_initcall(init_vdso);
#endif /* CONFIG_X86_64 */
diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index bd3e8421b57c..e07a22bb9308 100644
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -370,13 +370,13 @@ static int amd_pmu_cpu_prepare(int cpu)
WARN_ON_ONCE(cpuc->amd_nb);
if (!x86_pmu.amd_nb_constraints)
- return NOTIFY_OK;
+ return 0;
cpuc->amd_nb = amd_alloc_nb(cpu);
if (!cpuc->amd_nb)
- return NOTIFY_BAD;
+ return -ENOMEM;
- return NOTIFY_OK;
+ return 0;
}
static void amd_pmu_cpu_starting(int cpu)
diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index 72dea2f40fc4..155ea5324ae0 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -725,13 +725,10 @@ static __init int perf_ibs_pmu_init(struct perf_ibs *perf_ibs, char *name)
return ret;
}
-static __init int perf_event_ibs_init(void)
+static __init void perf_event_ibs_init(void)
{
struct attribute **attr = ibs_op_format_attrs;
- if (!ibs_caps)
- return -ENODEV; /* ibs not supported by the cpu */
-
perf_ibs_pmu_init(&perf_ibs_fetch, "ibs_fetch");
if (ibs_caps & IBS_CAPS_OPCNT) {
@@ -742,13 +739,11 @@ static __init int perf_event_ibs_init(void)
register_nmi_handler(NMI_LOCAL, perf_ibs_nmi_handler, 0, "perf_ibs");
pr_info("perf: AMD IBS detected (0x%08x)\n", ibs_caps);
-
- return 0;
}
#else /* defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_AMD) */
-static __init int perf_event_ibs_init(void) { return 0; }
+static __init void perf_event_ibs_init(void) { }
#endif
@@ -925,7 +920,7 @@ static inline int get_ibs_lvt_offset(void)
return val & IBSCTL_LVT_OFFSET_MASK;
}
-static void setup_APIC_ibs(void *dummy)
+static void setup_APIC_ibs(void)
{
int offset;
@@ -940,7 +935,7 @@ failed:
smp_processor_id());
}
-static void clear_APIC_ibs(void *dummy)
+static void clear_APIC_ibs(void)
{
int offset;
@@ -949,18 +944,24 @@ static void clear_APIC_ibs(void *dummy)
setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_FIX, 1);
}
+static int x86_pmu_amd_ibs_starting_cpu(unsigned int cpu)
+{
+ setup_APIC_ibs();
+ return 0;
+}
+
#ifdef CONFIG_PM
static int perf_ibs_suspend(void)
{
- clear_APIC_ibs(NULL);
+ clear_APIC_ibs();
return 0;
}
static void perf_ibs_resume(void)
{
ibs_eilvt_setup();
- setup_APIC_ibs(NULL);
+ setup_APIC_ibs();
}
static struct syscore_ops perf_ibs_syscore_ops = {
@@ -979,27 +980,15 @@ static inline void perf_ibs_pm_init(void) { }
#endif
-static int
-perf_ibs_cpu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
+static int x86_pmu_amd_ibs_dying_cpu(unsigned int cpu)
{
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- setup_APIC_ibs(NULL);
- break;
- case CPU_DYING:
- clear_APIC_ibs(NULL);
- break;
- default:
- break;
- }
-
- return NOTIFY_OK;
+ clear_APIC_ibs();
+ return 0;
}
static __init int amd_ibs_init(void)
{
u32 caps;
- int ret = -EINVAL;
caps = __get_ibs_caps();
if (!caps)
@@ -1008,22 +997,25 @@ static __init int amd_ibs_init(void)
ibs_eilvt_setup();
if (!ibs_eilvt_valid())
- goto out;
+ return -EINVAL;
perf_ibs_pm_init();
- cpu_notifier_register_begin();
+
ibs_caps = caps;
/* make ibs_caps visible to other cpus: */
smp_mb();
- smp_call_function(setup_APIC_ibs, NULL, 1);
- __perf_cpu_notifier(perf_ibs_cpu_notifier);
- cpu_notifier_register_done();
+ /*
+ * x86_pmu_amd_ibs_starting_cpu will be called from core on
+ * all online cpus.
+ */
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
+ "AP_PERF_X86_AMD_IBS_STARTING",
+ x86_pmu_amd_ibs_starting_cpu,
+ x86_pmu_amd_ibs_dying_cpu);
- ret = perf_event_ibs_init();
-out:
- if (ret)
- pr_err("Failed to setup IBS, %d\n", ret);
- return ret;
+ perf_event_ibs_init();
+
+ return 0;
}
/* Since we need the pci subsystem to init ibs we can't do this earlier: */
diff --git a/arch/x86/events/amd/power.c b/arch/x86/events/amd/power.c
index 55a3529dbf12..9842270ed2f2 100644
--- a/arch/x86/events/amd/power.c
+++ b/arch/x86/events/amd/power.c
@@ -228,12 +228,12 @@ static struct pmu pmu_class = {
.read = pmu_event_read,
};
-static void power_cpu_exit(int cpu)
+static int power_cpu_exit(unsigned int cpu)
{
int target;
if (!cpumask_test_and_clear_cpu(cpu, &cpu_mask))
- return;
+ return 0;
/*
* Find a new CPU on the same compute unit, if was set in cpumask
@@ -245,9 +245,10 @@ static void power_cpu_exit(int cpu)
cpumask_set_cpu(target, &cpu_mask);
perf_pmu_migrate_context(&pmu_class, cpu, target);
}
+ return 0;
}
-static void power_cpu_init(int cpu)
+static int power_cpu_init(unsigned int cpu)
{
int target;
@@ -255,7 +256,7 @@ static void power_cpu_init(int cpu)
* 1) If any CPU is set at cpu_mask in the same compute unit, do
* nothing.
* 2) If no CPU is set at cpu_mask in the same compute unit,
- * set current STARTING CPU.
+ * set current ONLINE CPU.
*
* Note: if there is a CPU aside of the new one already in the
* sibling mask, then it is also in cpu_mask.
@@ -263,33 +264,9 @@ static void power_cpu_init(int cpu)
target = cpumask_any_but(topology_sibling_cpumask(cpu), cpu);
if (target >= nr_cpumask_bits)
cpumask_set_cpu(cpu, &cpu_mask);
+ return 0;
}
-static int
-power_cpu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
-{
- unsigned int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_DOWN_FAILED:
- case CPU_STARTING:
- power_cpu_init(cpu);
- break;
- case CPU_DOWN_PREPARE:
- power_cpu_exit(cpu);
- break;
- default:
- break;
- }
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block power_cpu_notifier_nb = {
- .notifier_call = power_cpu_notifier,
- .priority = CPU_PRI_PERF,
-};
-
static const struct x86_cpu_id cpu_match[] = {
{ .vendor = X86_VENDOR_AMD, .family = 0x15 },
{},
@@ -297,7 +274,7 @@ static const struct x86_cpu_id cpu_match[] = {
static int __init amd_power_pmu_init(void)
{
- int cpu, target, ret;
+ int ret;
if (!x86_match_cpu(cpu_match))
return 0;
@@ -312,38 +289,25 @@ static int __init amd_power_pmu_init(void)
return -ENODEV;
}
- cpu_notifier_register_begin();
- /* Choose one online core of each compute unit. */
- for_each_online_cpu(cpu) {
- target = cpumask_first(topology_sibling_cpumask(cpu));
- if (!cpumask_test_cpu(target, &cpu_mask))
- cpumask_set_cpu(target, &cpu_mask);
- }
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
+ "AP_PERF_X86_AMD_POWER_ONLINE",
+ power_cpu_init, power_cpu_exit);
ret = perf_pmu_register(&pmu_class, "power", -1);
if (WARN_ON(ret)) {
pr_warn("AMD Power PMU registration failed\n");
- goto out;
+ return ret;
}
- __register_cpu_notifier(&power_cpu_notifier_nb);
-
pr_info("AMD Power PMU detected\n");
-
-out:
- cpu_notifier_register_done();
-
return ret;
}
module_init(amd_power_pmu_init);
static void __exit amd_power_pmu_exit(void)
{
- cpu_notifier_register_begin();
- __unregister_cpu_notifier(&power_cpu_notifier_nb);
- cpu_notifier_register_done();
-
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_AMD_POWER_ONLINE);
perf_pmu_unregister(&pmu_class);
}
module_exit(amd_power_pmu_exit);
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index 98ac57381bf9..e6131d4454e6 100644
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -358,7 +358,7 @@ amd_uncore_find_online_sibling(struct amd_uncore *this,
return this;
}
-static void amd_uncore_cpu_starting(unsigned int cpu)
+static int amd_uncore_cpu_starting(unsigned int cpu)
{
unsigned int eax, ebx, ecx, edx;
struct amd_uncore *uncore;
@@ -384,6 +384,8 @@ static void amd_uncore_cpu_starting(unsigned int cpu)
uncore = amd_uncore_find_online_sibling(uncore, amd_uncore_l2);
*per_cpu_ptr(amd_uncore_l2, cpu) = uncore;
}
+
+ return 0;
}
static void uncore_online(unsigned int cpu,
@@ -398,13 +400,15 @@ static void uncore_online(unsigned int cpu,
cpumask_set_cpu(cpu, uncore->active_mask);
}
-static void amd_uncore_cpu_online(unsigned int cpu)
+static int amd_uncore_cpu_online(unsigned int cpu)
{
if (amd_uncore_nb)
uncore_online(cpu, amd_uncore_nb);
if (amd_uncore_l2)
uncore_online(cpu, amd_uncore_l2);
+
+ return 0;
}
static void uncore_down_prepare(unsigned int cpu,
@@ -433,13 +437,15 @@ static void uncore_down_prepare(unsigned int cpu,
}
}
-static void amd_uncore_cpu_down_prepare(unsigned int cpu)
+static int amd_uncore_cpu_down_prepare(unsigned int cpu)
{
if (amd_uncore_nb)
uncore_down_prepare(cpu, amd_uncore_nb);
if (amd_uncore_l2)
uncore_down_prepare(cpu, amd_uncore_l2);
+
+ return 0;
}
static void uncore_dead(unsigned int cpu, struct amd_uncore * __percpu *uncores)
@@ -454,74 +460,19 @@ static void uncore_dead(unsigned int cpu, struct amd_uncore * __percpu *uncores)
*per_cpu_ptr(uncores, cpu) = NULL;
}
-static void amd_uncore_cpu_dead(unsigned int cpu)
+static int amd_uncore_cpu_dead(unsigned int cpu)
{
if (amd_uncore_nb)
uncore_dead(cpu, amd_uncore_nb);
if (amd_uncore_l2)
uncore_dead(cpu, amd_uncore_l2);
-}
-
-static int
-amd_uncore_cpu_notifier(struct notifier_block *self, unsigned long action,
- void *hcpu)
-{
- unsigned int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- if (amd_uncore_cpu_up_prepare(cpu))
- return notifier_from_errno(-ENOMEM);
- break;
-
- case CPU_STARTING:
- amd_uncore_cpu_starting(cpu);
- break;
-
- case CPU_ONLINE:
- amd_uncore_cpu_online(cpu);
- break;
-
- case CPU_DOWN_PREPARE:
- amd_uncore_cpu_down_prepare(cpu);
- break;
-
- case CPU_UP_CANCELED:
- case CPU_DEAD:
- amd_uncore_cpu_dead(cpu);
- break;
-
- default:
- break;
- }
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block amd_uncore_cpu_notifier_block = {
- .notifier_call = amd_uncore_cpu_notifier,
- .priority = CPU_PRI_PERF + 1,
-};
-
-static void __init init_cpu_already_online(void *dummy)
-{
- unsigned int cpu = smp_processor_id();
-
- amd_uncore_cpu_starting(cpu);
- amd_uncore_cpu_online(cpu);
-}
-static void cleanup_cpu_online(void *dummy)
-{
- unsigned int cpu = smp_processor_id();
-
- amd_uncore_cpu_dead(cpu);
+ return 0;
}
static int __init amd_uncore_init(void)
{
- unsigned int cpu, cpu2;
int ret = -ENODEV;
if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
@@ -558,38 +509,29 @@ static int __init amd_uncore_init(void)
ret = 0;
}
- if (ret)
- goto fail_nodev;
-
- cpu_notifier_register_begin();
-
- /* init cpus already online before registering for hotplug notifier */
- for_each_online_cpu(cpu) {
- ret = amd_uncore_cpu_up_prepare(cpu);
- if (ret)
- goto fail_online;
- smp_call_function_single(cpu, init_cpu_already_online, NULL, 1);
- }
-
- __register_cpu_notifier(&amd_uncore_cpu_notifier_block);
- cpu_notifier_register_done();
-
+ /*
+ * Install callbacks. Core will call them for each online cpu.
+ */
+ if (cpuhp_setup_state(CPUHP_PERF_X86_AMD_UNCORE_PREP,
+ "PERF_X86_AMD_UNCORE_PREP",
+ amd_uncore_cpu_up_prepare, amd_uncore_cpu_dead))
+ goto fail_l2;
+
+ if (cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
+ "AP_PERF_X86_AMD_UNCORE_STARTING",
+ amd_uncore_cpu_starting, NULL))
+ goto fail_prep;
+ if (cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
+ "AP_PERF_X86_AMD_UNCORE_ONLINE",
+ amd_uncore_cpu_online,
+ amd_uncore_cpu_down_prepare))
+ goto fail_start;
return 0;
-
-fail_online:
- for_each_online_cpu(cpu2) {
- if (cpu2 == cpu)
- break;
- smp_call_function_single(cpu, cleanup_cpu_online, NULL, 1);
- }
- cpu_notifier_register_done();
-
- /* amd_uncore_nb/l2 should have been freed by cleanup_cpu_online */
- amd_uncore_nb = amd_uncore_l2 = NULL;
-
- if (boot_cpu_has(X86_FEATURE_PERFCTR_L2))
- perf_pmu_unregister(&amd_l2_pmu);
+fail_start:
+ cpuhp_remove_state(CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING);
+fail_prep:
+ cpuhp_remove_state(CPUHP_PERF_X86_AMD_UNCORE_PREP);
fail_l2:
if (boot_cpu_has(X86_FEATURE_PERFCTR_NB))
perf_pmu_unregister(&amd_nb_pmu);
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index dfebbde2a4cc..c17f0de5fd39 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -1477,49 +1477,49 @@ NOKPROBE_SYMBOL(perf_event_nmi_handler);
struct event_constraint emptyconstraint;
struct event_constraint unconstrained;
-static int
-x86_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu)
+static int x86_pmu_prepare_cpu(unsigned int cpu)
{
- unsigned int cpu = (long)hcpu;
struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
- int i, ret = NOTIFY_OK;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- for (i = 0 ; i < X86_PERF_KFREE_MAX; i++)
- cpuc->kfree_on_online[i] = NULL;
- if (x86_pmu.cpu_prepare)
- ret = x86_pmu.cpu_prepare(cpu);
- break;
-
- case CPU_STARTING:
- if (x86_pmu.cpu_starting)
- x86_pmu.cpu_starting(cpu);
- break;
+ int i;
- case CPU_ONLINE:
- for (i = 0 ; i < X86_PERF_KFREE_MAX; i++) {
- kfree(cpuc->kfree_on_online[i]);
- cpuc->kfree_on_online[i] = NULL;
- }
- break;
+ for (i = 0 ; i < X86_PERF_KFREE_MAX; i++)
+ cpuc->kfree_on_online[i] = NULL;
+ if (x86_pmu.cpu_prepare)
+ return x86_pmu.cpu_prepare(cpu);
+ return 0;
+}
- case CPU_DYING:
- if (x86_pmu.cpu_dying)
- x86_pmu.cpu_dying(cpu);
- break;
+static int x86_pmu_dead_cpu(unsigned int cpu)
+{
+ if (x86_pmu.cpu_dead)
+ x86_pmu.cpu_dead(cpu);
+ return 0;
+}
- case CPU_UP_CANCELED:
- case CPU_DEAD:
- if (x86_pmu.cpu_dead)
- x86_pmu.cpu_dead(cpu);
- break;
+static int x86_pmu_online_cpu(unsigned int cpu)
+{
+ struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
+ int i;
- default:
- break;
+ for (i = 0 ; i < X86_PERF_KFREE_MAX; i++) {
+ kfree(cpuc->kfree_on_online[i]);
+ cpuc->kfree_on_online[i] = NULL;
}
+ return 0;
+}
- return ret;
+static int x86_pmu_starting_cpu(unsigned int cpu)
+{
+ if (x86_pmu.cpu_starting)
+ x86_pmu.cpu_starting(cpu);
+ return 0;
+}
+
+static int x86_pmu_dying_cpu(unsigned int cpu)
+{
+ if (x86_pmu.cpu_dying)
+ x86_pmu.cpu_dying(cpu);
+ return 0;
}
static void __init pmu_check_apic(void)
@@ -1787,10 +1787,39 @@ static int __init init_hw_perf_events(void)
pr_info("... fixed-purpose events: %d\n", x86_pmu.num_counters_fixed);
pr_info("... event mask: %016Lx\n", x86_pmu.intel_ctrl);
- perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
- perf_cpu_notifier(x86_pmu_notifier);
+ /*
+ * Install callbacks. Core will call them for each online
+ * cpu.
+ */
+ err = cpuhp_setup_state(CPUHP_PERF_X86_PREPARE, "PERF_X86_PREPARE",
+ x86_pmu_prepare_cpu, x86_pmu_dead_cpu);
+ if (err)
+ return err;
+
+ err = cpuhp_setup_state(CPUHP_AP_PERF_X86_STARTING,
+ "AP_PERF_X86_STARTING", x86_pmu_starting_cpu,
+ x86_pmu_dying_cpu);
+ if (err)
+ goto out;
+
+ err = cpuhp_setup_state(CPUHP_AP_PERF_X86_ONLINE, "AP_PERF_X86_ONLINE",
+ x86_pmu_online_cpu, NULL);
+ if (err)
+ goto out1;
+
+ err = perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
+ if (err)
+ goto out2;
return 0;
+
+out2:
+ cpuhp_remove_state(CPUHP_AP_PERF_X86_ONLINE);
+out1:
+ cpuhp_remove_state(CPUHP_AP_PERF_X86_STARTING);
+out:
+ cpuhp_remove_state(CPUHP_PERF_X86_PREPARE);
+ return err;
}
early_initcall(init_hw_perf_events);
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 0974ba11e954..2cbde2f449aa 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3109,7 +3109,7 @@ static int intel_pmu_cpu_prepare(int cpu)
cpuc->excl_thread_id = 0;
}
- return NOTIFY_OK;
+ return 0;
err_constraint_list:
kfree(cpuc->constraint_list);
@@ -3120,7 +3120,7 @@ err_shared_regs:
cpuc->shared_regs = NULL;
err:
- return NOTIFY_BAD;
+ return -ENOMEM;
}
static void intel_pmu_cpu_starting(int cpu)
diff --git a/arch/x86/events/intel/cqm.c b/arch/x86/events/intel/cqm.c
index 7b5fd811ef45..783c49ddef29 100644
--- a/arch/x86/events/intel/cqm.c
+++ b/arch/x86/events/intel/cqm.c
@@ -1577,7 +1577,7 @@ static inline void cqm_pick_event_reader(int cpu)
cpumask_set_cpu(cpu, &cqm_cpumask);
}
-static void intel_cqm_cpu_starting(unsigned int cpu)
+static int intel_cqm_cpu_starting(unsigned int cpu)
{
struct intel_pqr_state *state = &per_cpu(pqr_state, cpu);
struct cpuinfo_x86 *c = &cpu_data(cpu);
@@ -1588,39 +1588,26 @@ static void intel_cqm_cpu_starting(unsigned int cpu)
WARN_ON(c->x86_cache_max_rmid != cqm_max_rmid);
WARN_ON(c->x86_cache_occ_scale != cqm_l3_scale);
+
+ cqm_pick_event_reader(cpu);
+ return 0;
}
-static void intel_cqm_cpu_exit(unsigned int cpu)
+static int intel_cqm_cpu_exit(unsigned int cpu)
{
int target;
/* Is @cpu the current cqm reader for this package ? */
if (!cpumask_test_and_clear_cpu(cpu, &cqm_cpumask))
- return;
+ return 0;
/* Find another online reader in this package */
target = cpumask_any_but(topology_core_cpumask(cpu), cpu);
if (target < nr_cpu_ids)
cpumask_set_cpu(target, &cqm_cpumask);
-}
-
-static int intel_cqm_cpu_notifier(struct notifier_block *nb,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_DOWN_PREPARE:
- intel_cqm_cpu_exit(cpu);
- break;
- case CPU_STARTING:
- intel_cqm_cpu_starting(cpu);
- cqm_pick_event_reader(cpu);
- break;
- }
- return NOTIFY_OK;
+ return 0;
}
static const struct x86_cpu_id intel_cqm_match[] = {
@@ -1682,7 +1669,7 @@ out:
static int __init intel_cqm_init(void)
{
char *str = NULL, scale[20];
- int i, cpu, ret;
+ int cpu, ret;
if (x86_match_cpu(intel_cqm_match))
cqm_enabled = true;
@@ -1705,8 +1692,7 @@ static int __init intel_cqm_init(void)
*
* Also, check that the scales match on all cpus.
*/
- cpu_notifier_register_begin();
-
+ get_online_cpus();
for_each_online_cpu(cpu) {
struct cpuinfo_x86 *c = &cpu_data(cpu);
@@ -1743,11 +1729,6 @@ static int __init intel_cqm_init(void)
if (ret)
goto out;
- for_each_online_cpu(i) {
- intel_cqm_cpu_starting(i);
- cqm_pick_event_reader(i);
- }
-
if (mbm_enabled)
ret = intel_mbm_init();
if (ret && !cqm_enabled)
@@ -1772,12 +1753,18 @@ static int __init intel_cqm_init(void)
pr_info("Intel MBM enabled\n");
/*
- * Register the hot cpu notifier once we are sure cqm
+ * Setup the hot cpu notifier once we are sure cqm
* is enabled to avoid notifier leak.
*/
- __perf_cpu_notifier(intel_cqm_cpu_notifier);
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_CQM_STARTING,
+ "AP_PERF_X86_CQM_STARTING",
+ intel_cqm_cpu_starting, NULL);
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_CQM_ONLINE, "AP_PERF_X86_CQM_ONLINE",
+ NULL, intel_cqm_cpu_exit);
+
out:
- cpu_notifier_register_done();
+ put_online_cpus();
+
if (ret) {
kfree(str);
cqm_cleanup();
diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events/intel/cstate.c
index 4c7638b91fa5..3ca87b5a8677 100644
--- a/arch/x86/events/intel/cstate.c
+++ b/arch/x86/events/intel/cstate.c
@@ -366,7 +366,7 @@ static int cstate_pmu_event_add(struct perf_event *event, int mode)
* Check if exiting cpu is the designated reader. If so migrate the
* events when there is a valid target available
*/
-static void cstate_cpu_exit(int cpu)
+static int cstate_cpu_exit(unsigned int cpu)
{
unsigned int target;
@@ -391,9 +391,10 @@ static void cstate_cpu_exit(int cpu)
perf_pmu_migrate_context(&cstate_pkg_pmu, cpu, target);
}
}
+ return 0;
}
-static void cstate_cpu_init(int cpu)
+static int cstate_cpu_init(unsigned int cpu)
{
unsigned int target;
@@ -415,31 +416,10 @@ static void cstate_cpu_init(int cpu)
topology_core_cpumask(cpu));
if (has_cstate_pkg && target >= nr_cpu_ids)
cpumask_set_cpu(cpu, &cstate_pkg_cpu_mask);
-}
-static int cstate_cpu_notifier(struct notifier_block *self,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- cstate_cpu_init(cpu);
- break;
- case CPU_DOWN_PREPARE:
- cstate_cpu_exit(cpu);
- break;
- default:
- break;
- }
- return NOTIFY_OK;
+ return 0;
}
-static struct notifier_block cstate_cpu_nb = {
- .notifier_call = cstate_cpu_notifier,
- .priority = CPU_PRI_PERF + 1,
-};
-
static struct pmu cstate_core_pmu = {
.attr_groups = core_attr_groups,
.name = "cstate_core",
@@ -600,18 +580,20 @@ static inline void cstate_cleanup(void)
static int __init cstate_init(void)
{
- int cpu, err;
+ int err;
- cpu_notifier_register_begin();
- for_each_online_cpu(cpu)
- cstate_cpu_init(cpu);
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_CSTATE_STARTING,
+ "AP_PERF_X86_CSTATE_STARTING", cstate_cpu_init,
+ NULL);
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_CSTATE_ONLINE,
+ "AP_PERF_X86_CSTATE_ONLINE", NULL, cstate_cpu_exit);
if (has_cstate_core) {
err = perf_pmu_register(&cstate_core_pmu, cstate_core_pmu.name, -1);
if (err) {
has_cstate_core = false;
pr_info("Failed to register cstate core pmu\n");
- goto out;
+ return err;
}
}
@@ -621,12 +603,10 @@ static int __init cstate_init(void)
has_cstate_pkg = false;
pr_info("Failed to register cstate pkg pmu\n");
cstate_cleanup();
- goto out;
+ return err;
}
}
- __register_cpu_notifier(&cstate_cpu_nb);
-out:
- cpu_notifier_register_done();
+
return err;
}
@@ -652,9 +632,8 @@ module_init(cstate_pmu_init);
static void __exit cstate_pmu_exit(void)
{
- cpu_notifier_register_begin();
- __unregister_cpu_notifier(&cstate_cpu_nb);
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_ONLINE);
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_STARTING);
cstate_cleanup();
- cpu_notifier_register_done();
}
module_exit(cstate_pmu_exit);
diff --git a/arch/x86/events/intel/rapl.c b/arch/x86/events/intel/rapl.c
index d0c58b35155f..28865938aadf 100644
--- a/arch/x86/events/intel/rapl.c
+++ b/arch/x86/events/intel/rapl.c
@@ -556,14 +556,14 @@ const struct attribute_group *rapl_attr_groups[] = {
NULL,
};
-static void rapl_cpu_exit(int cpu)
+static int rapl_cpu_offline(unsigned int cpu)
{
struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu);
int target;
/* Check if exiting cpu is used for collecting rapl events */
if (!cpumask_test_and_clear_cpu(cpu, &rapl_cpu_mask))
- return;
+ return 0;
pmu->cpu = -1;
/* Find a new cpu to collect rapl events */
@@ -575,9 +575,10 @@ static void rapl_cpu_exit(int cpu)
pmu->cpu = target;
perf_pmu_migrate_context(pmu->pmu, cpu, target);
}
+ return 0;
}
-static void rapl_cpu_init(int cpu)
+static int rapl_cpu_online(unsigned int cpu)
{
struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu);
int target;
@@ -588,13 +589,14 @@ static void rapl_cpu_init(int cpu)
*/
target = cpumask_any_and(&rapl_cpu_mask, topology_core_cpumask(cpu));
if (target < nr_cpu_ids)
- return;
+ return 0;
cpumask_set_cpu(cpu, &rapl_cpu_mask);
pmu->cpu = cpu;
+ return 0;
}
-static int rapl_cpu_prepare(int cpu)
+static int rapl_cpu_prepare(unsigned int cpu)
{
struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu);
@@ -615,33 +617,6 @@ static int rapl_cpu_prepare(int cpu)
return 0;
}
-static int rapl_cpu_notifier(struct notifier_block *self,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- rapl_cpu_prepare(cpu);
- break;
-
- case CPU_DOWN_FAILED:
- case CPU_ONLINE:
- rapl_cpu_init(cpu);
- break;
-
- case CPU_DOWN_PREPARE:
- rapl_cpu_exit(cpu);
- break;
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block rapl_cpu_nb = {
- .notifier_call = rapl_cpu_notifier,
- .priority = CPU_PRI_PERF + 1,
-};
-
static int rapl_check_hw_unit(bool apply_quirk)
{
u64 msr_rapl_power_unit_bits;
@@ -692,24 +667,6 @@ static void __init rapl_advertise(void)
}
}
-static int __init rapl_prepare_cpus(void)
-{
- unsigned int cpu, pkg;
- int ret;
-
- for_each_online_cpu(cpu) {
- pkg = topology_logical_package_id(cpu);
- if (rapl_pmus->pmus[pkg])
- continue;
-
- ret = rapl_cpu_prepare(cpu);
- if (ret)
- return ret;
- rapl_cpu_init(cpu);
- }
- return 0;
-}
-
static void cleanup_rapl_pmus(void)
{
int i;
@@ -837,35 +794,44 @@ static int __init rapl_pmu_init(void)
if (ret)
return ret;
- cpu_notifier_register_begin();
+ /*
+ * Install callbacks. Core will call them for each online cpu.
+ */
- ret = rapl_prepare_cpus();
+ ret = cpuhp_setup_state(CPUHP_PERF_X86_RAPL_PREP, "PERF_X86_RAPL_PREP",
+ rapl_cpu_prepare, NULL);
if (ret)
goto out;
+ ret = cpuhp_setup_state(CPUHP_AP_PERF_X86_RAPL_ONLINE,
+ "AP_PERF_X86_RAPL_ONLINE",
+ rapl_cpu_online, rapl_cpu_offline);
+ if (ret)
+ goto out1;
+
ret = perf_pmu_register(&rapl_pmus->pmu, "power", -1);
if (ret)
- goto out;
+ goto out2;
- __register_cpu_notifier(&rapl_cpu_nb);
- cpu_notifier_register_done();
rapl_advertise();
return 0;
+out2:
+ cpuhp_remove_state(CPUHP_AP_PERF_X86_RAPL_ONLINE);
+out1:
+ cpuhp_remove_state(CPUHP_PERF_X86_RAPL_PREP);
out:
pr_warn("Initialization failed (%d), disabled\n", ret);
cleanup_rapl_pmus();
- cpu_notifier_register_done();
return ret;
}
module_init(rapl_pmu_init);
static void __exit intel_rapl_exit(void)
{
- cpu_notifier_register_begin();
- __unregister_cpu_notifier(&rapl_cpu_nb);
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_RAPL_ONLINE);
+ cpuhp_remove_state_nocalls(CPUHP_PERF_X86_RAPL_PREP);
perf_pmu_unregister(&rapl_pmus->pmu);
cleanup_rapl_pmus();
- cpu_notifier_register_done();
}
module_exit(intel_rapl_exit);
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index 59b4974c697f..3f3d0d67749b 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -1052,7 +1052,7 @@ static void uncore_pci_exit(void)
}
}
-static void uncore_cpu_dying(int cpu)
+static int uncore_cpu_dying(unsigned int cpu)
{
struct intel_uncore_type *type, **types = uncore_msr_uncores;
struct intel_uncore_pmu *pmu;
@@ -1069,16 +1069,19 @@ static void uncore_cpu_dying(int cpu)
uncore_box_exit(box);
}
}
+ return 0;
}
-static void uncore_cpu_starting(int cpu, bool init)
+static int first_init;
+
+static int uncore_cpu_starting(unsigned int cpu)
{
struct intel_uncore_type *type, **types = uncore_msr_uncores;
struct intel_uncore_pmu *pmu;
struct intel_uncore_box *box;
int i, pkg, ncpus = 1;
- if (init) {
+ if (first_init) {
/*
* On init we get the number of online cpus in the package
* and set refcount for all of them.
@@ -1099,9 +1102,11 @@ static void uncore_cpu_starting(int cpu, bool init)
uncore_box_init(box);
}
}
+
+ return 0;
}
-static int uncore_cpu_prepare(int cpu)
+static int uncore_cpu_prepare(unsigned int cpu)
{
struct intel_uncore_type *type, **types = uncore_msr_uncores;
struct intel_uncore_pmu *pmu;
@@ -1164,13 +1169,13 @@ static void uncore_change_context(struct intel_uncore_type **uncores,
uncore_change_type_ctx(*uncores, old_cpu, new_cpu);
}
-static void uncore_event_exit_cpu(int cpu)
+static int uncore_event_cpu_offline(unsigned int cpu)
{
int target;
/* Check if exiting cpu is used for collecting uncore events */
if (!cpumask_test_and_clear_cpu(cpu, &uncore_cpu_mask))
- return;
+ return 0;
/* Find a new cpu to collect uncore events */
target = cpumask_any_but(topology_core_cpumask(cpu), cpu);
@@ -1183,9 +1188,10 @@ static void uncore_event_exit_cpu(int cpu)
uncore_change_context(uncore_msr_uncores, cpu, target);
uncore_change_context(uncore_pci_uncores, cpu, target);
+ return 0;
}
-static void uncore_event_init_cpu(int cpu)
+static int uncore_event_cpu_online(unsigned int cpu)
{
int target;
@@ -1195,50 +1201,15 @@ static void uncore_event_init_cpu(int cpu)
*/
target = cpumask_any_and(&uncore_cpu_mask, topology_core_cpumask(cpu));
if (target < nr_cpu_ids)
- return;
+ return 0;
cpumask_set_cpu(cpu, &uncore_cpu_mask);
uncore_change_context(uncore_msr_uncores, -1, cpu);
uncore_change_context(uncore_pci_uncores, -1, cpu);
+ return 0;
}
-static int uncore_cpu_notifier(struct notifier_block *self,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- return notifier_from_errno(uncore_cpu_prepare(cpu));
-
- case CPU_STARTING:
- uncore_cpu_starting(cpu, false);
- case CPU_DOWN_FAILED:
- uncore_event_init_cpu(cpu);
- break;
-
- case CPU_UP_CANCELED:
- case CPU_DYING:
- uncore_cpu_dying(cpu);
- break;
-
- case CPU_DOWN_PREPARE:
- uncore_event_exit_cpu(cpu);
- break;
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block uncore_cpu_nb = {
- .notifier_call = uncore_cpu_notifier,
- /*
- * to migrate uncore events, our notifier should be executed
- * before perf core's notifier.
- */
- .priority = CPU_PRI_PERF + 1,
-};
-
static int __init type_pmu_register(struct intel_uncore_type *type)
{
int i, ret;
@@ -1282,41 +1253,6 @@ err:
return ret;
}
-static void __init uncore_cpu_setup(void *dummy)
-{
- uncore_cpu_starting(smp_processor_id(), true);
-}
-
-/* Lazy to avoid allocation of a few bytes for the normal case */
-static __initdata DECLARE_BITMAP(packages, MAX_LOCAL_APIC);
-
-static int __init uncore_cpumask_init(bool msr)
-{
- unsigned int cpu;
-
- for_each_online_cpu(cpu) {
- unsigned int pkg = topology_logical_package_id(cpu);
- int ret;
-
- if (test_and_set_bit(pkg, packages))
- continue;
- /*
- * The first online cpu of each package allocates and takes
- * the refcounts for all other online cpus in that package.
- * If msrs are not enabled no allocation is required.
- */
- if (msr) {
- ret = uncore_cpu_prepare(cpu);
- if (ret)
- return ret;
- }
- uncore_event_init_cpu(cpu);
- smp_call_function_single(cpu, uncore_cpu_setup, NULL, 1);
- }
- __register_cpu_notifier(&uncore_cpu_nb);
- return 0;
-}
-
#define X86_UNCORE_MODEL_MATCH(model, init) \
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&init }
@@ -1440,11 +1376,33 @@ static int __init intel_uncore_init(void)
if (cret && pret)
return -ENODEV;
- cpu_notifier_register_begin();
- ret = uncore_cpumask_init(!cret);
- if (ret)
- goto err;
- cpu_notifier_register_done();
+ /*
+ * Install callbacks. Core will call them for each online cpu.
+ *
+ * The first online cpu of each package allocates and takes
+ * the refcounts for all other online cpus in that package.
+ * If msrs are not enabled no allocation is required and
+ * uncore_cpu_prepare() is not called for each online cpu.
+ */
+ if (!cret) {
+ ret = cpuhp_setup_state(CPUHP_PERF_X86_UNCORE_PREP,
+ "PERF_X86_UNCORE_PREP",
+ uncore_cpu_prepare, NULL);
+ if (ret)
+ goto err;
+ } else {
+ cpuhp_setup_state_nocalls(CPUHP_PERF_X86_UNCORE_PREP,
+ "PERF_X86_UNCORE_PREP",
+ uncore_cpu_prepare, NULL);
+ }
+ first_init = 1;
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_STARTING,
+ "AP_PERF_X86_UNCORE_STARTING",
+ uncore_cpu_starting, uncore_cpu_dying);
+ first_init = 0;
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE,
+ "AP_PERF_X86_UNCORE_ONLINE",
+ uncore_event_cpu_online, uncore_event_cpu_offline);
return 0;
err:
@@ -1452,17 +1410,16 @@ err:
on_each_cpu_mask(&uncore_cpu_mask, uncore_exit_boxes, NULL, 1);
uncore_types_exit(uncore_msr_uncores);
uncore_pci_exit();
- cpu_notifier_register_done();
return ret;
}
module_init(intel_uncore_init);
static void __exit intel_uncore_exit(void)
{
- cpu_notifier_register_begin();
- __unregister_cpu_notifier(&uncore_cpu_nb);
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_UNCORE_ONLINE);
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_UNCORE_STARTING);
+ cpuhp_remove_state_nocalls(CPUHP_PERF_X86_UNCORE_PREP);
uncore_types_exit(uncore_msr_uncores);
uncore_pci_exit();
- cpu_notifier_register_done();
}
module_exit(intel_uncore_exit);
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
index cefacbad1531..456316f6c868 100644
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -215,26 +215,18 @@ void apbt_setup_secondary_clock(void)
* cpu timers during the offline process due to the ordering of notification.
* the extra interrupt is harmless.
*/
-static int apbt_cpuhp_notify(struct notifier_block *n,
- unsigned long action, void *hcpu)
+static int apbt_cpu_dead(unsigned int cpu)
{
- unsigned long cpu = (unsigned long)hcpu;
struct apbt_dev *adev = &per_cpu(cpu_apbt_dev, cpu);
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_DEAD:
- dw_apb_clockevent_pause(adev->timer);
- if (system_state == SYSTEM_RUNNING) {
- pr_debug("skipping APBT CPU %lu offline\n", cpu);
- } else {
- pr_debug("APBT clockevent for cpu %lu offline\n", cpu);
- dw_apb_clockevent_stop(adev->timer);
- }
- break;
- default:
- pr_debug("APBT notified %lu, no action\n", action);
+ dw_apb_clockevent_pause(adev->timer);
+ if (system_state == SYSTEM_RUNNING) {
+ pr_debug("skipping APBT CPU %u offline\n", cpu);
+ } else {
+ pr_debug("APBT clockevent for cpu %u offline\n", cpu);
+ dw_apb_clockevent_stop(adev->timer);
}
- return NOTIFY_OK;
+ return 0;
}
static __init int apbt_late_init(void)
@@ -242,9 +234,8 @@ static __init int apbt_late_init(void)
if (intel_mid_timer_options == INTEL_MID_TIMER_LAPIC_APBT ||
!apb_timer_block_enabled)
return 0;
- /* This notifier should be called after workqueue is ready */
- hotcpu_notifier(apbt_cpuhp_notify, -20);
- return 0;
+ return cpuhp_setup_state(CPUHP_X86_APB_DEAD, "X86_APB_DEAD", NULL,
+ apbt_cpu_dead);
}
fs_initcall(apbt_late_init);
#else
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 24170d0809ba..6368fa69d2af 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -152,68 +152,48 @@ static void init_x2apic_ldr(void)
}
}
- /*
- * At CPU state changes, update the x2apic cluster sibling info.
- */
-static int
-update_clusterinfo(struct notifier_block *nfb, unsigned long action, void *hcpu)
+/*
+ * At CPU state changes, update the x2apic cluster sibling info.
+ */
+int x2apic_prepare_cpu(unsigned int cpu)
{
- unsigned int this_cpu = (unsigned long)hcpu;
- unsigned int cpu;
- int err = 0;
-
- switch (action) {
- case CPU_UP_PREPARE:
- if (!zalloc_cpumask_var(&per_cpu(cpus_in_cluster, this_cpu),
- GFP_KERNEL)) {
- err = -ENOMEM;
- } else if (!zalloc_cpumask_var(&per_cpu(ipi_mask, this_cpu),
- GFP_KERNEL)) {
- free_cpumask_var(per_cpu(cpus_in_cluster, this_cpu));
- err = -ENOMEM;
- }
- break;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- case CPU_DEAD:
- for_each_online_cpu(cpu) {
- if (x2apic_cluster(this_cpu) != x2apic_cluster(cpu))
- continue;
- cpumask_clear_cpu(this_cpu, per_cpu(cpus_in_cluster, cpu));
- cpumask_clear_cpu(cpu, per_cpu(cpus_in_cluster, this_cpu));
- }
- free_cpumask_var(per_cpu(cpus_in_cluster, this_cpu));
- free_cpumask_var(per_cpu(ipi_mask, this_cpu));
- break;
+ if (!zalloc_cpumask_var(&per_cpu(cpus_in_cluster, cpu), GFP_KERNEL))
+ return -ENOMEM;
+
+ if (!zalloc_cpumask_var(&per_cpu(ipi_mask, cpu), GFP_KERNEL)) {
+ free_cpumask_var(per_cpu(cpus_in_cluster, cpu));
+ return -ENOMEM;
}
- return notifier_from_errno(err);
+ return 0;
}
-static struct notifier_block x2apic_cpu_notifier = {
- .notifier_call = update_clusterinfo,
-};
-
-static int x2apic_init_cpu_notifier(void)
+int x2apic_dead_cpu(unsigned int this_cpu)
{
- int cpu = smp_processor_id();
-
- zalloc_cpumask_var(&per_cpu(cpus_in_cluster, cpu), GFP_KERNEL);
- zalloc_cpumask_var(&per_cpu(ipi_mask, cpu), GFP_KERNEL);
+ int cpu;
- BUG_ON(!per_cpu(cpus_in_cluster, cpu) || !per_cpu(ipi_mask, cpu));
-
- cpumask_set_cpu(cpu, per_cpu(cpus_in_cluster, cpu));
- register_hotcpu_notifier(&x2apic_cpu_notifier);
- return 1;
+ for_each_online_cpu(cpu) {
+ if (x2apic_cluster(this_cpu) != x2apic_cluster(cpu))
+ continue;
+ cpumask_clear_cpu(this_cpu, per_cpu(cpus_in_cluster, cpu));
+ cpumask_clear_cpu(cpu, per_cpu(cpus_in_cluster, this_cpu));
+ }
+ free_cpumask_var(per_cpu(cpus_in_cluster, this_cpu));
+ free_cpumask_var(per_cpu(ipi_mask, this_cpu));
+ return 0;
}
static int x2apic_cluster_probe(void)
{
- if (x2apic_mode)
- return x2apic_init_cpu_notifier();
- else
+ int cpu = smp_processor_id();
+
+ if (!x2apic_mode)
return 0;
+
+ cpumask_set_cpu(cpu, per_cpu(cpus_in_cluster, cpu));
+ cpuhp_setup_state(CPUHP_X2APIC_PREPARE, "X2APIC_PREPARE",
+ x2apic_prepare_cpu, x2apic_dead_cpu);
+ return 1;
}
static const struct cpumask *x2apic_cluster_target_cpus(void)
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index f112af7aa62e..3d747070fe67 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -710,31 +710,29 @@ static void hpet_work(struct work_struct *w)
complete(&hpet_work->complete);
}
-static int hpet_cpuhp_notify(struct notifier_block *n,
- unsigned long action, void *hcpu)
+static int hpet_cpuhp_online(unsigned int cpu)
{
- unsigned long cpu = (unsigned long)hcpu;
struct hpet_work_struct work;
+
+ INIT_DELAYED_WORK_ONSTACK(&work.work, hpet_work);
+ init_completion(&work.complete);
+ /* FIXME: add schedule_work_on() */
+ schedule_delayed_work_on(cpu, &work.work, 0);
+ wait_for_completion(&work.complete);
+ destroy_delayed_work_on_stack(&work.work);
+ return 0;
+}
+
+static int hpet_cpuhp_dead(unsigned int cpu)
+{
struct hpet_dev *hdev = per_cpu(cpu_hpet_dev, cpu);
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- INIT_DELAYED_WORK_ONSTACK(&work.work, hpet_work);
- init_completion(&work.complete);
- /* FIXME: add schedule_work_on() */
- schedule_delayed_work_on(cpu, &work.work, 0);
- wait_for_completion(&work.complete);
- destroy_delayed_work_on_stack(&work.work);
- break;
- case CPU_DEAD:
- if (hdev) {
- free_irq(hdev->irq, hdev);
- hdev->flags &= ~HPET_DEV_USED;
- per_cpu(cpu_hpet_dev, cpu) = NULL;
- }
- break;
- }
- return NOTIFY_OK;
+ if (!hdev)
+ return 0;
+ free_irq(hdev->irq, hdev);
+ hdev->flags &= ~HPET_DEV_USED;
+ per_cpu(cpu_hpet_dev, cpu) = NULL;
+ return 0;
}
#else
@@ -750,11 +748,8 @@ static void hpet_reserve_msi_timers(struct hpet_data *hd)
}
#endif
-static int hpet_cpuhp_notify(struct notifier_block *n,
- unsigned long action, void *hcpu)
-{
- return NOTIFY_OK;
-}
+#define hpet_cpuhp_online NULL
+#define hpet_cpuhp_dead NULL
#endif
@@ -931,7 +926,7 @@ out_nohpet:
*/
static __init int hpet_late_init(void)
{
- int cpu;
+ int ret;
if (boot_hpet_disable)
return -ENODEV;
@@ -961,16 +956,20 @@ static __init int hpet_late_init(void)
if (boot_cpu_has(X86_FEATURE_ARAT))
return 0;
- cpu_notifier_register_begin();
- for_each_online_cpu(cpu) {
- hpet_cpuhp_notify(NULL, CPU_ONLINE, (void *)(long)cpu);
- }
-
/* This notifier should be called after workqueue is ready */
- __hotcpu_notifier(hpet_cpuhp_notify, -20);
- cpu_notifier_register_done();
-
+ ret = cpuhp_setup_state(CPUHP_AP_X86_HPET_ONLINE, "AP_X86_HPET_ONLINE",
+ hpet_cpuhp_online, NULL);
+ if (ret)
+ return ret;
+ ret = cpuhp_setup_state(CPUHP_X86_HPET_DEAD, "X86_HPET_DEAD", NULL,
+ hpet_cpuhp_dead);
+ if (ret)
+ goto err_cpuhp;
return 0;
+
+err_cpuhp:
+ cpuhp_remove_state(CPUHP_AP_X86_HPET_ONLINE);
+ return ret;
}
fs_initcall(hpet_late_init);
diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index 9b0185fbe3eb..654f6c66fe45 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -323,25 +323,16 @@ static int tboot_wait_for_aps(int num_aps)
return !(atomic_read((atomic_t *)&tboot->num_in_wfs) == num_aps);
}
-static int tboot_cpu_callback(struct notifier_block *nfb, unsigned long action,
- void *hcpu)
+static int tboot_dying_cpu(unsigned int cpu)
{
- switch (action) {
- case CPU_DYING:
- atomic_inc(&ap_wfs_count);
- if (num_online_cpus() == 1)
- if (tboot_wait_for_aps(atomic_read(&ap_wfs_count)))
- return NOTIFY_BAD;
- break;
+ atomic_inc(&ap_wfs_count);
+ if (num_online_cpus() == 1) {
+ if (tboot_wait_for_aps(atomic_read(&ap_wfs_count)))
+ return -EBUSY;
}
- return NOTIFY_OK;
+ return 0;
}
-static struct notifier_block tboot_cpu_notifier =
-{
- .notifier_call = tboot_cpu_callback,
-};
-
#ifdef CONFIG_DEBUG_FS
#define TBOOT_LOG_UUID { 0x26, 0x25, 0x19, 0xc0, 0x30, 0x6b, 0xb4, 0x4d, \
@@ -417,8 +408,8 @@ static __init int tboot_late_init(void)
tboot_create_trampoline();
atomic_set(&ap_wfs_count, 0);
- register_hotcpu_notifier(&tboot_cpu_notifier);
-
+ cpuhp_setup_state(CPUHP_AP_X86_TBOOT_DYING, "AP_X86_TBOOT_DYING", NULL,
+ tboot_dying_cpu);
#ifdef CONFIG_DEBUG_FS
debugfs_create_file("tboot_log", S_IRUSR,
arch_debugfs_dir, NULL, &tboot_log_fops);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b2766723c951..45608a7da9b3 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5552,9 +5552,10 @@ int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
}
EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
-static void tsc_bad(void *info)
+static int kvmclock_cpu_down_prep(unsigned int cpu)
{
__this_cpu_write(cpu_tsc_khz, 0);
+ return 0;
}
static void tsc_khz_changed(void *data)
@@ -5659,35 +5660,18 @@ static struct notifier_block kvmclock_cpufreq_notifier_block = {
.notifier_call = kvmclock_cpufreq_notifier
};
-static int kvmclock_cpu_notifier(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
+static int kvmclock_cpu_online(unsigned int cpu)
{
- unsigned int cpu = (unsigned long)hcpu;
-
- switch (action) {
- case CPU_ONLINE:
- case CPU_DOWN_FAILED:
- smp_call_function_single(cpu, tsc_khz_changed, NULL, 1);
- break;
- case CPU_DOWN_PREPARE:
- smp_call_function_single(cpu, tsc_bad, NULL, 1);
- break;
- }
- return NOTIFY_OK;
+ tsc_khz_changed(NULL);
+ return 0;
}
-static struct notifier_block kvmclock_cpu_notifier_block = {
- .notifier_call = kvmclock_cpu_notifier,
- .priority = -INT_MAX
-};
-
static void kvm_timer_init(void)
{
int cpu;
max_tsc_khz = tsc_khz;
- cpu_notifier_register_begin();
if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
#ifdef CONFIG_CPU_FREQ
struct cpufreq_policy policy;
@@ -5702,12 +5686,9 @@ static void kvm_timer_init(void)
CPUFREQ_TRANSITION_NOTIFIER);
}
pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz);
- for_each_online_cpu(cpu)
- smp_call_function_single(cpu, tsc_khz_changed, NULL, 1);
-
- __register_hotcpu_notifier(&kvmclock_cpu_notifier_block);
- cpu_notifier_register_done();
+ cpuhp_setup_state(CPUHP_AP_X86_KVM_CLK_ONLINE, "AP_X86_KVM_CLK_ONLINE",
+ kvmclock_cpu_online, kvmclock_cpu_down_prep);
}
static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
@@ -5896,7 +5877,7 @@ void kvm_arch_exit(void)
if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
- unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block);
+ cpuhp_remove_state_nocalls(CPUHP_AP_X86_KVM_CLK_ONLINE);
#ifdef CONFIG_X86_64
pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier);
#endif
diff --git a/arch/xtensa/kernel/perf_event.c b/arch/xtensa/kernel/perf_event.c
index ef90479e0397..0fecc8a2c0b5 100644
--- a/arch/xtensa/kernel/perf_event.c
+++ b/arch/xtensa/kernel/perf_event.c
@@ -404,7 +404,7 @@ static struct pmu xtensa_pmu = {
.read = xtensa_pmu_read,
};
-static void xtensa_pmu_setup(void)
+static int xtensa_pmu_setup(int cpu)
{
unsigned i;
@@ -413,21 +413,7 @@ static void xtensa_pmu_setup(void)
set_er(0, XTENSA_PMU_PMCTRL(i));
set_er(get_er(XTENSA_PMU_PMSTAT(i)), XTENSA_PMU_PMSTAT(i));
}
-}
-
-static int xtensa_pmu_notifier(struct notifier_block *self,
- unsigned long action, void *data)
-{
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- xtensa_pmu_setup();
- break;
-
- default:
- break;
- }
-
- return NOTIFY_OK;
+ return 0;
}
static int __init xtensa_pmu_init(void)
@@ -435,7 +421,13 @@ static int __init xtensa_pmu_init(void)
int ret;
int irq = irq_create_mapping(NULL, XCHAL_PROFILING_INTERRUPT);
- perf_cpu_notifier(xtensa_pmu_notifier);
+ ret = cpuhp_setup_state(CPUHP_AP_PERF_XTENSA_STARTING,
+ "AP_PERF_XTENSA_STARTING", xtensa_pmu_setup,
+ NULL);
+ if (ret) {
+ pr_err("xtensa_pmu: failed to register CPU-hotplug.\n");
+ return ret;
+ }
#if XTENSA_FAKE_NMI
enable_irq(irq);
#else