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arch/hotplug: Call into idle with a proper state

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Let the non boot cpus call into idle with the corresponding hotplug state, so
the hotplug core can handle the further bringup. That's a first step to
convert the boot side of the hotplugged cpus to do all the synchronization
with the other side through the state machine. For now it'll only start the
hotplug thread and kick the full bringup of the cpu.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: Rik van Riel <riel@redhat.com>
Cc: Rafael Wysocki <rafael.j.wysocki@intel.com>
Cc: "Srivatsa S. Bhat" <srivatsa@mit.edu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Turner <pjt@google.com>
Link: http://lkml.kernel.org/r/20160226182341.614102639@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2016-02-26 18:43:40 +00:00
parent 1cf4f629d9
commit fc6d73d674
22 changed files with 22 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/alpha/kernel/smp.c
View File

@ -168,7 +168,7 @@ smp_callin(void)
cpuid, current, current->active_mm));
preempt_disable();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
/* Wait until hwrpb->txrdy is clear for cpu. Return -1 on timeout. */

2
arch/arc/kernel/smp.c
View File

@ -142,7 +142,7 @@ void start_kernel_secondary(void)
local_irq_enable();
preempt_disable();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
/*

2
arch/arm/kernel/smp.c
View File

@ -409,7 +409,7 @@ asmlinkage void secondary_start_kernel(void)
/*
* OK, it's off to the idle thread for us
*/
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
void __init smp_cpus_done(unsigned int max_cpus)

2
arch/arm64/kernel/smp.c
View File

@ -195,7 +195,7 @@ asmlinkage void secondary_start_kernel(void)
/*
* OK, it's off to the idle thread for us
*/
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
#ifdef CONFIG_HOTPLUG_CPU

2
arch/blackfin/mach-common/smp.c
View File

@ -333,7 +333,7 @@ void secondary_start_kernel(void)
/* We are done with local CPU inits, unblock the boot CPU. */
set_cpu_online(cpu, true);
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
void __init smp_prepare_boot_cpu(void)

2
arch/hexagon/kernel/smp.c
View File

@ -180,7 +180,7 @@ void start_secondary(void)
local_irq_enable();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}

2
arch/ia64/kernel/smpboot.c
View File

@ -454,7 +454,7 @@ start_secondary (void *unused)
preempt_disable();
smp_callin();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
return 0;
}

2
arch/m32r/kernel/smpboot.c
View File

@ -432,7 +432,7 @@ int __init start_secondary(void *unused)
*/
local_flush_tlb_all();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
return 0;
}

2
arch/metag/kernel/smp.c
View File

@ -396,7 +396,7 @@ asmlinkage void secondary_start_kernel(void)
/*
* OK, it's off to the idle thread for us
*/
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
void __init smp_cpus_done(unsigned int max_cpus)

2
arch/mips/kernel/smp.c
View File

@ -191,7 +191,7 @@ asmlinkage void start_secondary(void)
WARN_ON_ONCE(!irqs_disabled());
mp_ops->smp_finish();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
static void stop_this_cpu(void *dummy)

2
arch/mn10300/kernel/smp.c
View File

@ -675,7 +675,7 @@ int __init start_secondary(void *unused)
#ifdef CONFIG_GENERIC_CLOCKEVENTS
init_clockevents();
#endif
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
return 0;
}

2
arch/parisc/kernel/smp.c
View File

@ -305,7 +305,7 @@ void __init smp_callin(void)
local_irq_enable(); /* Interrupts have been off until now */
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
/* NOTREACHED */
panic("smp_callin() AAAAaaaaahhhh....\n");

2
arch/powerpc/kernel/smp.c
View File

@ -727,7 +727,7 @@ void start_secondary(void *unused)
local_irq_enable();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
BUG();
}

2
arch/s390/kernel/smp.c
View File

@ -798,7 +798,7 @@ static void smp_start_secondary(void *cpuvoid)
set_cpu_online(smp_processor_id(), true);
inc_irq_stat(CPU_RST);
local_irq_enable();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
/* Upping and downing of CPUs */

2
arch/sh/kernel/smp.c
View File

@ -203,7 +203,7 @@ asmlinkage void start_secondary(void)
set_cpu_online(cpu, true);
per_cpu(cpu_state, cpu) = CPU_ONLINE;
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
extern struct {

2
arch/sparc/kernel/smp_32.c
View File

@ -364,7 +364,7 @@ static void sparc_start_secondary(void *arg)
local_irq_enable();
wmb();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
/* We should never reach here! */
BUG();

2
arch/sparc/kernel/smp_64.c
View File

@ -134,7 +134,7 @@ void smp_callin(void)
local_irq_enable();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
void cpu_panic(void)

2
arch/tile/kernel/smpboot.c
View File

@ -208,7 +208,7 @@ void online_secondary(void)
/* Set up tile-timer clock-event device on this cpu */
setup_tile_timer();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
int __cpu_up(unsigned int cpu, struct task_struct *tidle)

2
arch/x86/kernel/smpboot.c
View File

@ -248,7 +248,7 @@ static void notrace start_secondary(void *unused)
x86_cpuinit.setup_percpu_clockev();
wmb();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
void __init smp_store_boot_cpu_info(void)

2
arch/x86/xen/smp.c
View File

@ -112,7 +112,7 @@ asmlinkage __visible void cpu_bringup_and_idle(int cpu)
xen_pvh_secondary_vcpu_init(cpu);
#endif
cpu_bringup();
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
static void xen_smp_intr_free(unsigned int cpu)

2
arch/xtensa/kernel/smp.c
View File

@ -157,7 +157,7 @@ void secondary_start_kernel(void)
complete(&cpu_running);
cpu_startup_entry(CPUHP_ONLINE);
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
static void mx_cpu_start(void *p)

1
include/linux/cpuhotplug.h
View File

@ -13,6 +13,7 @@ enum cpuhp_state {
CPUHP_CPU_SET_ACTIVE,
CPUHP_KICK_AP_THREAD,
CPUHP_BP_ONLINE,
CPUHP_AP_ONLINE_IDLE,
CPUHP_AP_SMPBOOT_THREADS,
CPUHP_AP_NOTIFY_ONLINE,
CPUHP_AP_ONLINE_DYN,