Loading...
// 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(); if (should_hard_irq_enable(regs)) do_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 */ |