linux/arch/mips/kernel/smp-up.c
Paul Burton d595d423d0 MIPS: SMP: Allow boot_secondary SMP op to return errors
Allow the boot_secondary SMP op to return an error to __cpu_up(), which
will in turn return it to its caller.

This will allow SMP implementations to return errors quickly in cases
they they know have failed, rather than relying upon __cpu_up()
eventually timing out waiting for the cpu_running completion.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17014/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-30 00:57:27 +02:00

80 lines
1.5 KiB
C

/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2006, 07 by Ralf Baechle (ralf@linux-mips.org)
*
* Symmetric Uniprocessor (TM) Support
*/
#include <linux/kernel.h>
#include <linux/sched.h>
/*
* Send inter-processor interrupt
*/
static void up_send_ipi_single(int cpu, unsigned int action)
{
panic(KERN_ERR "%s called", __func__);
}
static inline void up_send_ipi_mask(const struct cpumask *mask,
unsigned int action)
{
panic(KERN_ERR "%s called", __func__);
}
/*
* After we've done initial boot, this function is called to allow the
* board code to clean up state, if needed
*/
static void up_init_secondary(void)
{
}
static void up_smp_finish(void)
{
}
/*
* Firmware CPU startup hook
*/
static int up_boot_secondary(int cpu, struct task_struct *idle)
{
return 0;
}
static void __init up_smp_setup(void)
{
}
static void __init up_prepare_cpus(unsigned int max_cpus)
{
}
#ifdef CONFIG_HOTPLUG_CPU
static int up_cpu_disable(void)
{
return -ENOSYS;
}
static void up_cpu_die(unsigned int cpu)
{
BUG();
}
#endif
const struct plat_smp_ops up_smp_ops = {
.send_ipi_single = up_send_ipi_single,
.send_ipi_mask = up_send_ipi_mask,
.init_secondary = up_init_secondary,
.smp_finish = up_smp_finish,
.boot_secondary = up_boot_secondary,
.smp_setup = up_smp_setup,
.prepare_cpus = up_prepare_cpus,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_disable = up_cpu_disable,
.cpu_die = up_cpu_die,
#endif
};