x86: create smp.c
this patch moves all the functions and data structures that look
like exactly the same from smp_{32,64}.c to smp.c
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Glauber Costa
Ingo Molnar
parent
377d698426
commit
f9e47a126b
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@ -46,7 +46,8 @@ obj-$(CONFIG_MICROCODE) += microcode.o
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obj-$(CONFIG_PCI) += early-quirks.o
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apm-y := apm_32.o
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obj-$(CONFIG_APM) += apm.o
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obj-$(CONFIG_X86_SMP) += smp_$(BITS).o smpboot_$(BITS).o smpboot.o tsc_sync.o
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obj-$(CONFIG_X86_SMP) += smp_$(BITS).o smpboot_$(BITS).o smp.o
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obj-$(CONFIG_X86_SMP) += smpboot.o tsc_sync.o
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obj-$(CONFIG_X86_32_SMP) += smpcommon.o
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obj-$(CONFIG_X86_64_SMP) += smp_64.o smpboot_64.o tsc_sync.o smpcommon.o
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obj-$(CONFIG_X86_TRAMPOLINE) += trampoline_$(BITS).o
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@ -0,0 +1,253 @@
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <linux/spinlock.h>
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#include <linux/kernel_stat.h>
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#include <linux/mc146818rtc.h>
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#include <linux/cache.h>
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#include <linux/interrupt.h>
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#include <linux/cpu.h>
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#include <asm/mtrr.h>
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#include <asm/tlbflush.h>
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#include <asm/mmu_context.h>
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#include <asm/proto.h>
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#ifdef CONFIG_X86_32
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#include <mach_apic.h>
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#include <mach_ipi.h>
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#else
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#include <asm/mach_apic.h>
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#endif
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/*
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* this function sends a 'reschedule' IPI to another CPU.
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* it goes straight through and wastes no time serializing
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* anything. Worst case is that we lose a reschedule ...
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*/
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static void native_smp_send_reschedule(int cpu)
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{
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WARN_ON(cpu_is_offline(cpu));
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send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
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}
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/*
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* Structure and data for smp_call_function(). This is designed to minimise
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* static memory requirements. It also looks cleaner.
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*/
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static DEFINE_SPINLOCK(call_lock);
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struct call_data_struct {
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void (*func) (void *info);
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void *info;
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atomic_t started;
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atomic_t finished;
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int wait;
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};
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void lock_ipi_call_lock(void)
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{
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spin_lock_irq(&call_lock);
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}
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void unlock_ipi_call_lock(void)
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{
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spin_unlock_irq(&call_lock);
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}
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static struct call_data_struct *call_data;
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static void __smp_call_function(void (*func) (void *info), void *info,
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int nonatomic, int wait)
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{
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struct call_data_struct data;
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int cpus = num_online_cpus() - 1;
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if (!cpus)
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return;
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data.func = func;
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data.info = info;
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atomic_set(&data.started, 0);
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data.wait = wait;
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if (wait)
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atomic_set(&data.finished, 0);
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call_data = &data;
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mb();
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/* Send a message to all other CPUs and wait for them to respond */
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send_IPI_allbutself(CALL_FUNCTION_VECTOR);
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/* Wait for response */
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while (atomic_read(&data.started) != cpus)
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cpu_relax();
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if (wait)
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while (atomic_read(&data.finished) != cpus)
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cpu_relax();
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}
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/**
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* smp_call_function_mask(): Run a function on a set of other CPUs.
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* @mask: The set of cpus to run on. Must not include the current cpu.
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* @func: The function to run. This must be fast and non-blocking.
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* @info: An arbitrary pointer to pass to the function.
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* @wait: If true, wait (atomically) until function has completed on other CPUs.
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*
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* Returns 0 on success, else a negative status code.
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*
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* If @wait is true, then returns once @func has returned; otherwise
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* it returns just before the target cpu calls @func.
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*
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* You must not call this function with disabled interrupts or from a
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* hardware interrupt handler or from a bottom half handler.
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*/
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static int
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native_smp_call_function_mask(cpumask_t mask,
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void (*func)(void *), void *info,
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int wait)
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{
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struct call_data_struct data;
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cpumask_t allbutself;
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int cpus;
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/* Can deadlock when called with interrupts disabled */
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WARN_ON(irqs_disabled());
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/* Holding any lock stops cpus from going down. */
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spin_lock(&call_lock);
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allbutself = cpu_online_map;
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cpu_clear(smp_processor_id(), allbutself);
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cpus_and(mask, mask, allbutself);
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cpus = cpus_weight(mask);
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if (!cpus) {
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spin_unlock(&call_lock);
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return 0;
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}
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data.func = func;
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data.info = info;
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atomic_set(&data.started, 0);
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data.wait = wait;
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if (wait)
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atomic_set(&data.finished, 0);
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call_data = &data;
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wmb();
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/* Send a message to other CPUs */
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if (cpus_equal(mask, allbutself))
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send_IPI_allbutself(CALL_FUNCTION_VECTOR);
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else
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send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
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/* Wait for response */
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while (atomic_read(&data.started) != cpus)
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cpu_relax();
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if (wait)
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while (atomic_read(&data.finished) != cpus)
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cpu_relax();
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spin_unlock(&call_lock);
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return 0;
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}
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static void stop_this_cpu(void *dummy)
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{
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local_irq_disable();
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/*
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* Remove this CPU:
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*/
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cpu_clear(smp_processor_id(), cpu_online_map);
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disable_local_APIC();
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if (hlt_works(smp_processor_id()))
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for (;;) halt();
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for (;;);
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}
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/*
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* this function calls the 'stop' function on all other CPUs in the system.
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*/
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static void native_smp_send_stop(void)
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{
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int nolock;
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unsigned long flags;
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if (reboot_force)
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return;
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/* Don't deadlock on the call lock in panic */
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nolock = !spin_trylock(&call_lock);
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local_irq_save(flags);
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__smp_call_function(stop_this_cpu, NULL, 0, 0);
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if (!nolock)
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spin_unlock(&call_lock);
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disable_local_APIC();
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local_irq_restore(flags);
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}
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/*
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* Reschedule call back. Nothing to do,
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* all the work is done automatically when
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* we return from the interrupt.
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*/
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void smp_reschedule_interrupt(struct pt_regs *regs)
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{
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ack_APIC_irq();
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#ifdef CONFIG_X86_32
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__get_cpu_var(irq_stat).irq_resched_count++;
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#else
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add_pda(irq_resched_count, 1);
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#endif
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}
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void smp_call_function_interrupt(struct pt_regs *regs)
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{
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void (*func) (void *info) = call_data->func;
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void *info = call_data->info;
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int wait = call_data->wait;
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ack_APIC_irq();
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/*
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* Notify initiating CPU that I've grabbed the data and am
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* about to execute the function
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*/
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mb();
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atomic_inc(&call_data->started);
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/*
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* At this point the info structure may be out of scope unless wait==1
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*/
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irq_enter();
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(*func)(info);
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#ifdef CONFIG_X86_32
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__get_cpu_var(irq_stat).irq_call_count++;
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#else
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add_pda(irq_call_count, 1);
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#endif
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irq_exit();
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if (wait) {
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mb();
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atomic_inc(&call_data->finished);
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}
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}
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struct smp_ops smp_ops = {
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.smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
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.smp_prepare_cpus = native_smp_prepare_cpus,
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.cpu_up = native_cpu_up,
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.smp_cpus_done = native_smp_cpus_done,
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.smp_send_stop = native_smp_send_stop,
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.smp_send_reschedule = native_smp_send_reschedule,
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.smp_call_function_mask = native_smp_call_function_mask,
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};
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EXPORT_SYMBOL_GPL(smp_ops);
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@ -466,217 +466,6 @@ void flush_tlb_all(void)
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on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
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}
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/*
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* this function sends a 'reschedule' IPI to another CPU.
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* it goes straight through and wastes no time serializing
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* anything. Worst case is that we lose a reschedule ...
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*/
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static void native_smp_send_reschedule(int cpu)
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{
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WARN_ON(cpu_is_offline(cpu));
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send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
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}
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/*
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* Structure and data for smp_call_function(). This is designed to minimise
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* static memory requirements. It also looks cleaner.
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*/
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static DEFINE_SPINLOCK(call_lock);
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struct call_data_struct {
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void (*func) (void *info);
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void *info;
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atomic_t started;
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atomic_t finished;
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int wait;
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};
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void lock_ipi_call_lock(void)
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{
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spin_lock_irq(&call_lock);
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}
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void unlock_ipi_call_lock(void)
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{
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spin_unlock_irq(&call_lock);
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}
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static struct call_data_struct *call_data;
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static void __smp_call_function(void (*func) (void *info), void *info,
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int nonatomic, int wait)
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{
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struct call_data_struct data;
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int cpus = num_online_cpus() - 1;
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if (!cpus)
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return;
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data.func = func;
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data.info = info;
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atomic_set(&data.started, 0);
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data.wait = wait;
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if (wait)
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atomic_set(&data.finished, 0);
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call_data = &data;
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mb();
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/* Send a message to all other CPUs and wait for them to respond */
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send_IPI_allbutself(CALL_FUNCTION_VECTOR);
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/* Wait for response */
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while (atomic_read(&data.started) != cpus)
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cpu_relax();
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if (wait)
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while (atomic_read(&data.finished) != cpus)
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cpu_relax();
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}
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/**
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* smp_call_function_mask(): Run a function on a set of other CPUs.
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* @mask: The set of cpus to run on. Must not include the current cpu.
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* @func: The function to run. This must be fast and non-blocking.
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* @info: An arbitrary pointer to pass to the function.
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* @wait: If true, wait (atomically) until function has completed on other CPUs.
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*
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* Returns 0 on success, else a negative status code.
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*
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* If @wait is true, then returns once @func has returned; otherwise
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* it returns just before the target cpu calls @func.
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*
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* You must not call this function with disabled interrupts or from a
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* hardware interrupt handler or from a bottom half handler.
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*/
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static int
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native_smp_call_function_mask(cpumask_t mask,
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void (*func)(void *), void *info,
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int wait)
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{
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struct call_data_struct data;
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cpumask_t allbutself;
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int cpus;
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/* Can deadlock when called with interrupts disabled */
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WARN_ON(irqs_disabled());
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/* Holding any lock stops cpus from going down. */
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spin_lock(&call_lock);
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allbutself = cpu_online_map;
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cpu_clear(smp_processor_id(), allbutself);
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cpus_and(mask, mask, allbutself);
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cpus = cpus_weight(mask);
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if (!cpus) {
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spin_unlock(&call_lock);
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return 0;
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}
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data.func = func;
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data.info = info;
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atomic_set(&data.started, 0);
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data.wait = wait;
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if (wait)
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atomic_set(&data.finished, 0);
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call_data = &data;
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wmb();
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/* Send a message to other CPUs */
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if (cpus_equal(mask, allbutself))
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send_IPI_allbutself(CALL_FUNCTION_VECTOR);
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else
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send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
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/* Wait for response */
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while (atomic_read(&data.started) != cpus)
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cpu_relax();
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if (wait)
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while (atomic_read(&data.finished) != cpus)
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cpu_relax();
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spin_unlock(&call_lock);
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return 0;
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}
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static void stop_this_cpu (void * dummy)
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{
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local_irq_disable();
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/*
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* Remove this CPU:
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*/
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cpu_clear(smp_processor_id(), cpu_online_map);
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disable_local_APIC();
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if (hlt_works(smp_processor_id()))
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for(;;) halt();
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for (;;);
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}
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/*
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* this function calls the 'stop' function on all other CPUs in the system.
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*/
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static void native_smp_send_stop(void)
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{
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int nolock;
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unsigned long flags;
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if (reboot_force)
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return;
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/* Don't deadlock on the call lock in panic */
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nolock = !spin_trylock(&call_lock);
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local_irq_save(flags);
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__smp_call_function(stop_this_cpu, NULL, 0, 0);
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if (!nolock)
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spin_unlock(&call_lock);
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disable_local_APIC();
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local_irq_restore(flags);
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}
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/*
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* Reschedule call back. Nothing to do,
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* all the work is done automatically when
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* we return from the interrupt.
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*/
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void smp_reschedule_interrupt(struct pt_regs *regs)
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{
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ack_APIC_irq();
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__get_cpu_var(irq_stat).irq_resched_count++;
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}
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void smp_call_function_interrupt(struct pt_regs *regs)
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{
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void (*func) (void *info) = call_data->func;
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void *info = call_data->info;
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int wait = call_data->wait;
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ack_APIC_irq();
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/*
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* Notify initiating CPU that I've grabbed the data and am
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* about to execute the function
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*/
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mb();
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atomic_inc(&call_data->started);
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/*
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* At this point the info structure may be out of scope unless wait==1
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*/
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irq_enter();
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(*func)(info);
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__get_cpu_var(irq_stat).irq_call_count++;
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irq_exit();
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if (wait) {
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mb();
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atomic_inc(&call_data->finished);
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}
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}
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static int convert_apicid_to_cpu(int apic_id)
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{
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int i;
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@ -703,15 +492,3 @@ int safe_smp_processor_id(void)
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return cpuid >= 0 ? cpuid : 0;
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}
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struct smp_ops smp_ops = {
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.smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
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.smp_prepare_cpus = native_smp_prepare_cpus,
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.cpu_up = native_cpu_up,
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.smp_cpus_done = native_smp_cpus_done,
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.smp_send_stop = native_smp_send_stop,
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.smp_send_reschedule = native_smp_send_reschedule,
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.smp_call_function_mask = native_smp_call_function_mask,
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};
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EXPORT_SYMBOL_GPL(smp_ops);
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@ -283,208 +283,3 @@ void flush_tlb_all(void)
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{
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on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
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}
|
||||
|
||||
/*
|
||||
* this function sends a 'reschedule' IPI to another CPU.
|
||||
* it goes straight through and wastes no time serializing
|
||||
* anything. Worst case is that we lose a reschedule ...
|
||||
*/
|
||||
|
||||
static void native_smp_send_reschedule(int cpu)
|
||||
{
|
||||
WARN_ON(cpu_is_offline(cpu));
|
||||
send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
|
||||
}
|
||||
|
||||
/*
|
||||
* Structure and data for smp_call_function(). This is designed to minimise
|
||||
* static memory requirements. It also looks cleaner.
|
||||
*/
|
||||
static DEFINE_SPINLOCK(call_lock);
|
||||
|
||||
struct call_data_struct {
|
||||
void (*func) (void *info);
|
||||
void *info;
|
||||
atomic_t started;
|
||||
atomic_t finished;
|
||||
int wait;
|
||||
};
|
||||
|
||||
static struct call_data_struct * call_data;
|
||||
|
||||
void lock_ipi_call_lock(void)
|
||||
{
|
||||
spin_lock_irq(&call_lock);
|
||||
}
|
||||
|
||||
void unlock_ipi_call_lock(void)
|
||||
{
|
||||
spin_unlock_irq(&call_lock);
|
||||
}
|
||||
|
||||
static void __smp_call_function(void (*func) (void *info), void *info,
|
||||
int nonatomic, int wait)
|
||||
{
|
||||
struct call_data_struct data;
|
||||
int cpus = num_online_cpus() - 1;
|
||||
|
||||
if (!cpus)
|
||||
return;
|
||||
|
||||
data.func = func;
|
||||
data.info = info;
|
||||
atomic_set(&data.started, 0);
|
||||
data.wait = wait;
|
||||
if (wait)
|
||||
atomic_set(&data.finished, 0);
|
||||
|
||||
call_data = &data;
|
||||
mb();
|
||||
|
||||
/* Send a message to all other CPUs and wait for them to respond */
|
||||
send_IPI_allbutself(CALL_FUNCTION_VECTOR);
|
||||
|
||||
/* Wait for response */
|
||||
while (atomic_read(&data.started) != cpus)
|
||||
cpu_relax();
|
||||
|
||||
if (wait)
|
||||
while (atomic_read(&data.finished) != cpus)
|
||||
cpu_relax();
|
||||
}
|
||||
|
||||
|
||||
int native_smp_call_function_mask(cpumask_t mask,
|
||||
void (*func)(void *), void *info,
|
||||
int wait)
|
||||
{
|
||||
struct call_data_struct data;
|
||||
cpumask_t allbutself;
|
||||
int cpus;
|
||||
|
||||
/* Can deadlock when called with interrupts disabled */
|
||||
WARN_ON(irqs_disabled());
|
||||
|
||||
/* Holding any lock stops cpus from going down. */
|
||||
spin_lock(&call_lock);
|
||||
|
||||
allbutself = cpu_online_map;
|
||||
cpu_clear(smp_processor_id(), allbutself);
|
||||
|
||||
cpus_and(mask, mask, allbutself);
|
||||
cpus = cpus_weight(mask);
|
||||
|
||||
if (!cpus) {
|
||||
spin_unlock(&call_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
data.func = func;
|
||||
data.info = info;
|
||||
atomic_set(&data.started, 0);
|
||||
data.wait = wait;
|
||||
if (wait)
|
||||
atomic_set(&data.finished, 0);
|
||||
|
||||
call_data = &data;
|
||||
wmb();
|
||||
|
||||
/* Send a message to other CPUs */
|
||||
if (cpus_equal(mask, allbutself))
|
||||
send_IPI_allbutself(CALL_FUNCTION_VECTOR);
|
||||
else
|
||||
send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
|
||||
|
||||
/* Wait for response */
|
||||
while (atomic_read(&data.started) != cpus)
|
||||
cpu_relax();
|
||||
|
||||
if (wait)
|
||||
while (atomic_read(&data.finished) != cpus)
|
||||
cpu_relax();
|
||||
|
||||
spin_unlock(&call_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void stop_this_cpu(void *dummy)
|
||||
{
|
||||
local_irq_disable();
|
||||
/*
|
||||
* Remove this CPU:
|
||||
*/
|
||||
cpu_clear(smp_processor_id(), cpu_online_map);
|
||||
disable_local_APIC();
|
||||
if (hlt_works(smp_processor_id()))
|
||||
for (;;) halt();
|
||||
for (;;);
|
||||
}
|
||||
|
||||
void native_smp_send_stop(void)
|
||||
{
|
||||
int nolock;
|
||||
unsigned long flags;
|
||||
|
||||
if (reboot_force)
|
||||
return;
|
||||
|
||||
/* Don't deadlock on the call lock in panic */
|
||||
nolock = !spin_trylock(&call_lock);
|
||||
local_irq_save(flags);
|
||||
__smp_call_function(stop_this_cpu, NULL, 0, 0);
|
||||
if (!nolock)
|
||||
spin_unlock(&call_lock);
|
||||
disable_local_APIC();
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
/*
|
||||
* Reschedule call back. Nothing to do,
|
||||
* all the work is done automatically when
|
||||
* we return from the interrupt.
|
||||
*/
|
||||
asmlinkage void smp_reschedule_interrupt(void)
|
||||
{
|
||||
ack_APIC_irq();
|
||||
add_pda(irq_resched_count, 1);
|
||||
}
|
||||
|
||||
asmlinkage void smp_call_function_interrupt(void)
|
||||
{
|
||||
void (*func) (void *info) = call_data->func;
|
||||
void *info = call_data->info;
|
||||
int wait = call_data->wait;
|
||||
|
||||
ack_APIC_irq();
|
||||
/*
|
||||
* Notify initiating CPU that I've grabbed the data and am
|
||||
* about to execute the function
|
||||
*/
|
||||
mb();
|
||||
atomic_inc(&call_data->started);
|
||||
/*
|
||||
* At this point the info structure may be out of scope unless wait==1
|
||||
*/
|
||||
exit_idle();
|
||||
irq_enter();
|
||||
(*func)(info);
|
||||
add_pda(irq_call_count, 1);
|
||||
irq_exit();
|
||||
if (wait) {
|
||||
mb();
|
||||
atomic_inc(&call_data->finished);
|
||||
}
|
||||
}
|
||||
|
||||
struct smp_ops smp_ops = {
|
||||
.smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
|
||||
.smp_prepare_cpus = native_smp_prepare_cpus,
|
||||
.smp_cpus_done = native_smp_cpus_done,
|
||||
|
||||
.smp_send_stop = native_smp_send_stop,
|
||||
.smp_send_reschedule = native_smp_send_reschedule,
|
||||
.smp_call_function_mask = native_smp_call_function_mask,
|
||||
.cpu_up = native_cpu_up,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(smp_ops);
|
||||
|
|
|
|||
Loading…
Reference in New Issue