47 строки
971 B
C
47 строки
971 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Author: Kumar Gala <galak@kernel.crashing.org>
|
|
*
|
|
* Copyright 2009 Freescale Semiconductor Inc.
|
|
*/
|
|
|
|
#include <linux/stddef.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/hardirq.h>
|
|
|
|
#include <asm/dbell.h>
|
|
#include <asm/interrupt.h>
|
|
#include <asm/irq_regs.h>
|
|
#include <asm/kvm_ppc.h>
|
|
#include <asm/trace.h>
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
DEFINE_INTERRUPT_HANDLER_ASYNC(doorbell_exception)
|
|
{
|
|
struct pt_regs *old_regs = set_irq_regs(regs);
|
|
|
|
trace_doorbell_entry(regs);
|
|
|
|
ppc_msgsync();
|
|
|
|
may_hard_irq_enable();
|
|
|
|
kvmppc_clear_host_ipi(smp_processor_id());
|
|
__this_cpu_inc(irq_stat.doorbell_irqs);
|
|
|
|
smp_ipi_demux_relaxed(); /* already performed the barrier */
|
|
|
|
trace_doorbell_exit(regs);
|
|
|
|
set_irq_regs(old_regs);
|
|
}
|
|
#else /* CONFIG_SMP */
|
|
DEFINE_INTERRUPT_HANDLER_ASYNC(doorbell_exception)
|
|
{
|
|
printk(KERN_WARNING "Received doorbell on non-smp system\n");
|
|
}
|
|
#endif /* CONFIG_SMP */
|