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Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Selaa lähdekoodia 
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
  ...
This commit is contained in:
Linus Torvalds
2016-07-29 13:55:30 -07:00
vanhempi 1a81a8f2a5 4fae16dffb
commit a6408f6cb6
75 muutettua tiedostoa jossa 1321 lisäystä ja 2018 poistoa
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35
virt/kvm/arm/arch_timer.c
Näytä tiedosto

@@ -405,26 +405,17 @@ u64 kvm_arm_timer_get_reg(struct kvm_vcpu *vcpu, u64 regid)
return (u64)-1;
}
static int kvm_timer_cpu_notify(struct notifier_block *self,
unsigned long action, void *cpu)
static int kvm_timer_starting_cpu(unsigned int cpu)
{
switch (action) {
case CPU_STARTING:
case CPU_STARTING_FROZEN:
kvm_timer_init_interrupt(NULL);
break;
case CPU_DYING:
case CPU_DYING_FROZEN:
disable_percpu_irq(host_vtimer_irq);
break;
}
return NOTIFY_OK;
kvm_timer_init_interrupt(NULL);
return 0;
}
static struct notifier_block kvm_timer_cpu_nb = {
.notifier_call = kvm_timer_cpu_notify,
};
static int kvm_timer_dying_cpu(unsigned int cpu)
{
disable_percpu_irq(host_vtimer_irq);
return 0;
}
int kvm_timer_hyp_init(void)
{
@@ -449,12 +440,6 @@ int kvm_timer_hyp_init(void)
goto out;
}
err = __register_cpu_notifier(&kvm_timer_cpu_nb);
if (err) {
kvm_err("Cannot register timer CPU notifier\n");
goto out_free;
}
wqueue = create_singlethread_workqueue("kvm_arch_timer");
if (!wqueue) {
err = -ENOMEM;
@@ -462,8 +447,10 @@ int kvm_timer_hyp_init(void)
}
kvm_info("virtual timer IRQ%d\n", host_vtimer_irq);
on_each_cpu(kvm_timer_init_interrupt, NULL, 1);
cpuhp_setup_state(CPUHP_AP_KVM_ARM_TIMER_STARTING,
"AP_KVM_ARM_TIMER_STARTING", kvm_timer_starting_cpu,
kvm_timer_dying_cpu);
goto out;
out_free:
free_percpu_irq(host_vtimer_irq, kvm_get_running_vcpus());

39
virt/kvm/arm/vgic.c
Näytä tiedosto

@@ -2326,32 +2326,18 @@ int vgic_has_attr_regs(const struct vgic_io_range *ranges, phys_addr_t offset)
return -ENXIO;
}
static void vgic_init_maintenance_interrupt(void *info)
static int vgic_starting_cpu(unsigned int cpu)
{
enable_percpu_irq(vgic->maint_irq, 0);
return 0;
}
static int vgic_cpu_notify(struct notifier_block *self,
unsigned long action, void *cpu)
static int vgic_dying_cpu(unsigned int cpu)
{
switch (action) {
case CPU_STARTING:
case CPU_STARTING_FROZEN:
vgic_init_maintenance_interrupt(NULL);
break;
case CPU_DYING:
case CPU_DYING_FROZEN:
disable_percpu_irq(vgic->maint_irq);
break;
}
return NOTIFY_OK;
disable_percpu_irq(vgic->maint_irq);
return 0;
}
static struct notifier_block vgic_cpu_nb = {
.notifier_call = vgic_cpu_notify,
};
static int kvm_vgic_probe(void)
{
const struct gic_kvm_info *gic_kvm_info;
@@ -2392,19 +2378,10 @@ int kvm_vgic_hyp_init(void)
return ret;
}
ret = __register_cpu_notifier(&vgic_cpu_nb);
if (ret) {
kvm_err("Cannot register vgic CPU notifier\n");
goto out_free_irq;
}
on_each_cpu(vgic_init_maintenance_interrupt, NULL, 1);
cpuhp_setup_state(CPUHP_AP_KVM_ARM_VGIC_STARTING,
"AP_KVM_ARM_VGIC_STARTING", vgic_starting_cpu,
vgic_dying_cpu);
return 0;
out_free_irq:
free_percpu_irq(vgic->maint_irq, kvm_get_running_vcpus());
return ret;
}
int kvm_irq_map_gsi(struct kvm *kvm,

31
virt/kvm/arm/vgic/vgic-init.c
Näytä tiedosto

@@ -353,32 +353,19 @@ out:
/* GENERIC PROBE */
static void vgic_init_maintenance_interrupt(void *info)
static int vgic_init_cpu_starting(unsigned int cpu)
{
enable_percpu_irq(kvm_vgic_global_state.maint_irq, 0);
return 0;
}
static int vgic_cpu_notify(struct notifier_block *self,
unsigned long action, void *cpu)
static int vgic_init_cpu_dying(unsigned int cpu)
{
switch (action) {
case CPU_STARTING:
case CPU_STARTING_FROZEN:
vgic_init_maintenance_interrupt(NULL);
break;
case CPU_DYING:
case CPU_DYING_FROZEN:
disable_percpu_irq(kvm_vgic_global_state.maint_irq);
break;
}
return NOTIFY_OK;
disable_percpu_irq(kvm_vgic_global_state.maint_irq);
return 0;
}
static struct notifier_block vgic_cpu_nb = {
.notifier_call = vgic_cpu_notify,
};
static irqreturn_t vgic_maintenance_handler(int irq, void *data)
{
/*
@@ -434,14 +421,14 @@ int kvm_vgic_hyp_init(void)
return ret;
}
ret = __register_cpu_notifier(&vgic_cpu_nb);
ret = cpuhp_setup_state(CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
"AP_KVM_ARM_VGIC_INIT_STARTING",
vgic_init_cpu_starting, vgic_init_cpu_dying);
if (ret) {
kvm_err("Cannot register vgic CPU notifier\n");
goto out_free_irq;
}
on_each_cpu(vgic_init_maintenance_interrupt, NULL, 1);
kvm_info("vgic interrupt IRQ%d\n", kvm_vgic_global_state.maint_irq);
return 0;

32
virt/kvm/kvm_main.c
Näytä tiedosto

@@ -3155,12 +3155,13 @@ static void hardware_enable_nolock(void *junk)
}
}
static void hardware_enable(void)
static int kvm_starting_cpu(unsigned int cpu)
{
raw_spin_lock(&kvm_count_lock);
if (kvm_usage_count)
hardware_enable_nolock(NULL);
raw_spin_unlock(&kvm_count_lock);
return 0;
}
static void hardware_disable_nolock(void *junk)
@@ -3173,12 +3174,13 @@ static void hardware_disable_nolock(void *junk)
kvm_arch_hardware_disable();
}
static void hardware_disable(void)
static int kvm_dying_cpu(unsigned int cpu)
{
raw_spin_lock(&kvm_count_lock);
if (kvm_usage_count)
hardware_disable_nolock(NULL);
raw_spin_unlock(&kvm_count_lock);
return 0;
}
static void hardware_disable_all_nolock(void)
@@ -3219,21 +3221,6 @@ static int hardware_enable_all(void)
return r;
}
static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
void *v)
{
val &= ~CPU_TASKS_FROZEN;
switch (val) {
case CPU_DYING:
hardware_disable();
break;
case CPU_STARTING:
hardware_enable();
break;
}
return NOTIFY_OK;
}
static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
void *v)
{
@@ -3500,10 +3487,6 @@ int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
return r;
}
static struct notifier_block kvm_cpu_notifier = {
.notifier_call = kvm_cpu_hotplug,
};
static int kvm_debugfs_open(struct inode *inode, struct file *file,
int (*get)(void *, u64 *), int (*set)(void *, u64),
const char *fmt)
@@ -3754,7 +3737,8 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
goto out_free_1;
}
r = register_cpu_notifier(&kvm_cpu_notifier);
r = cpuhp_setup_state_nocalls(CPUHP_AP_KVM_STARTING, "AP_KVM_STARTING",
kvm_starting_cpu, kvm_dying_cpu);
if (r)
goto out_free_2;
register_reboot_notifier(&kvm_reboot_notifier);
@@ -3808,7 +3792,7 @@ out_free:
kmem_cache_destroy(kvm_vcpu_cache);
out_free_3:
unregister_reboot_notifier(&kvm_reboot_notifier);
unregister_cpu_notifier(&kvm_cpu_notifier);
cpuhp_remove_state_nocalls(CPUHP_AP_KVM_STARTING);
out_free_2:
out_free_1:
kvm_arch_hardware_unsetup();
@@ -3831,7 +3815,7 @@ void kvm_exit(void)
kvm_async_pf_deinit();
unregister_syscore_ops(&kvm_syscore_ops);
unregister_reboot_notifier(&kvm_reboot_notifier);
unregister_cpu_notifier(&kvm_cpu_notifier);
cpuhp_remove_state_nocalls(CPUHP_AP_KVM_STARTING);
on_each_cpu(hardware_disable_nolock, NULL, 1);
kvm_arch_hardware_unsetup();
kvm_arch_exit();