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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374// SPDX-License-Identifier: GPL-2.0-only/* * Uniprocessor-only support functions. The counterpart to kernel/smp.c */
#include <linux/interrupt.h>#include <linux/kernel.h>#include <linux/export.h>#include <linux/smp.h>#include <linux/hypervisor.h>
int smp_call_function_single(int cpu, void (*func) (void *info), void *info, int wait){ unsigned long flags;
if (cpu != 0) return -ENXIO;
local_irq_save(flags); func(info); local_irq_restore(flags);
return 0;}EXPORT_SYMBOL(smp_call_function_single);
int smp_call_function_single_async(int cpu, call_single_data_t *csd){ unsigned long flags;
local_irq_save(flags); csd->func(csd->info); local_irq_restore(flags); return 0;}EXPORT_SYMBOL(smp_call_function_single_async);
/* * Preemption is disabled here to make sure the cond_func is called under the * same conditions in UP and SMP. */void on_each_cpu_cond_mask(smp_cond_func_t cond_func, smp_call_func_t func, void *info, bool wait, const struct cpumask *mask){ unsigned long flags;
preempt_disable(); if ((!cond_func || cond_func(0, info)) && cpumask_test_cpu(0, mask)) { local_irq_save(flags); func(info); local_irq_restore(flags); } preempt_enable();}EXPORT_SYMBOL(on_each_cpu_cond_mask);
int smp_call_on_cpu(unsigned int cpu, int (*func)(void *), void *par, bool phys){ int ret;
if (cpu != 0) return -ENXIO;
if (phys) hypervisor_pin_vcpu(0); ret = func(par); if (phys) hypervisor_pin_vcpu(-1);
return ret;}EXPORT_SYMBOL_GPL(smp_call_on_cpu);