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-rw-r--r--arch/arm/kernel/smp.c64
1 files changed, 37 insertions, 27 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 47ab90563bf..2dc19349eb1 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -45,6 +45,7 @@
#include <asm/smp_plat.h>
#include <asm/virt.h>
#include <asm/mach/arch.h>
+#include <asm/mpu.h>
/*
* as from 2.5, kernels no longer have an init_tasks structure
@@ -57,7 +58,7 @@ struct secondary_data secondary_data;
* control for which core is the next to come out of the secondary
* boot "holding pen"
*/
-volatile int __cpuinitdata pen_release = -1;
+volatile int pen_release = -1;
enum ipi_msg_type {
IPI_WAKEUP,
@@ -78,7 +79,14 @@ void __init smp_set_ops(struct smp_operations *ops)
smp_ops = *ops;
};
-int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
+static unsigned long get_arch_pgd(pgd_t *pgd)
+{
+ phys_addr_t pgdir = virt_to_phys(pgd);
+ BUG_ON(pgdir & ARCH_PGD_MASK);
+ return pgdir >> ARCH_PGD_SHIFT;
+}
+
+int __cpu_up(unsigned int cpu, struct task_struct *idle)
{
int ret;
@@ -87,8 +95,14 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
* its stack and the page tables.
*/
secondary_data.stack = task_stack_page(idle) + THREAD_START_SP;
- secondary_data.pgdir = virt_to_phys(idmap_pgd);
- secondary_data.swapper_pg_dir = virt_to_phys(swapper_pg_dir);
+#ifdef CONFIG_ARM_MPU
+ secondary_data.mpu_rgn_szr = mpu_rgn_info.rgns[MPU_RAM_REGION].drsr;
+#endif
+
+#ifdef CONFIG_MMU
+ secondary_data.pgdir = get_arch_pgd(idmap_pgd);
+ secondary_data.swapper_pg_dir = get_arch_pgd(swapper_pg_dir);
+#endif
__cpuc_flush_dcache_area(&secondary_data, sizeof(secondary_data));
outer_clean_range(__pa(&secondary_data), __pa(&secondary_data + 1));
@@ -112,9 +126,8 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
pr_err("CPU%u: failed to boot: %d\n", cpu, ret);
}
- secondary_data.stack = NULL;
- secondary_data.pgdir = 0;
+ memset(&secondary_data, 0, sizeof(secondary_data));
return ret;
}
@@ -125,13 +138,23 @@ void __init smp_init_cpus(void)
smp_ops.smp_init_cpus();
}
-int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+int boot_secondary(unsigned int cpu, struct task_struct *idle)
{
if (smp_ops.smp_boot_secondary)
return smp_ops.smp_boot_secondary(cpu, idle);
return -ENOSYS;
}
+int platform_can_cpu_hotplug(void)
+{
+#ifdef CONFIG_HOTPLUG_CPU
+ if (smp_ops.cpu_kill)
+ return 1;
+#endif
+
+ return 0;
+}
+
#ifdef CONFIG_HOTPLUG_CPU
static void percpu_timer_stop(void);
@@ -157,7 +180,7 @@ static int platform_cpu_disable(unsigned int cpu)
/*
* __cpu_disable runs on the processor to be shutdown.
*/
-int __cpuinit __cpu_disable(void)
+int __cpu_disable(void)
{
unsigned int cpu = smp_processor_id();
int ret;
@@ -203,7 +226,7 @@ static DECLARE_COMPLETION(cpu_died);
* called on the thread which is asking for a CPU to be shutdown -
* waits until shutdown has completed, or it is timed out.
*/
-void __cpuinit __cpu_die(unsigned int cpu)
+void __cpu_die(unsigned int cpu)
{
if (!wait_for_completion_timeout(&cpu_died, msecs_to_jiffies(5000))) {
pr_err("CPU%u: cpu didn't die\n", cpu);
@@ -251,7 +274,7 @@ void __ref cpu_die(void)
* this returns, power and/or clocks can be removed at any point
* from this CPU and its cache by platform_cpu_kill().
*/
- RCU_NONIDLE(complete(&cpu_died));
+ complete(&cpu_died);
/*
* Ensure that the cache lines associated with that completion are
@@ -293,7 +316,7 @@ void __ref cpu_die(void)
* Called by both boot and secondaries to move global data into
* per-processor storage.
*/
-static void __cpuinit smp_store_cpu_info(unsigned int cpuid)
+static void smp_store_cpu_info(unsigned int cpuid)
{
struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpuid);
@@ -309,7 +332,7 @@ static void percpu_timer_setup(void);
* This is the secondary CPU boot entry. We're using this CPUs
* idle thread stack, but a set of temporary page tables.
*/
-asmlinkage void __cpuinit secondary_start_kernel(void)
+asmlinkage void secondary_start_kernel(void)
{
struct mm_struct *mm = &init_mm;
unsigned int cpu;
@@ -508,7 +531,7 @@ static void broadcast_timer_set_mode(enum clock_event_mode mode,
{
}
-static void __cpuinit broadcast_timer_setup(struct clock_event_device *evt)
+static void broadcast_timer_setup(struct clock_event_device *evt)
{
evt->name = "dummy_timer";
evt->features = CLOCK_EVT_FEAT_ONESHOT |
@@ -537,7 +560,7 @@ int local_timer_register(struct local_timer_ops *ops)
}
#endif
-static void __cpuinit percpu_timer_setup(void)
+static void percpu_timer_setup(void)
{
unsigned int cpu = smp_processor_id();
struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
@@ -651,17 +674,6 @@ void smp_send_reschedule(int cpu)
smp_cross_call(cpumask_of(cpu), IPI_RESCHEDULE);
}
-#ifdef CONFIG_HOTPLUG_CPU
-static void smp_kill_cpus(cpumask_t *mask)
-{
- unsigned int cpu;
- for_each_cpu(cpu, mask)
- platform_cpu_kill(cpu);
-}
-#else
-static void smp_kill_cpus(cpumask_t *mask) { }
-#endif
-
void smp_send_stop(void)
{
unsigned long timeout;
@@ -679,8 +691,6 @@ void smp_send_stop(void)
if (num_online_cpus() > 1)
pr_warning("SMP: failed to stop secondary CPUs\n");
-
- smp_kill_cpus(&mask);
}
/*