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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /arch/powerpc/kernel/dbell.c | |
| parent | Initial commit. (diff) | |
| download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip | |
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/kernel/dbell.c')
| -rw-r--r-- | arch/powerpc/kernel/dbell.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c new file mode 100644 index 000000000..52680cf07 --- /dev/null +++ b/arch/powerpc/kernel/dbell.c @@ -0,0 +1,47 @@ +// 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/irq_regs.h> +#include <asm/kvm_ppc.h> +#include <asm/trace.h> + +#ifdef CONFIG_SMP + +void doorbell_exception(struct pt_regs *regs) +{ + struct pt_regs *old_regs = set_irq_regs(regs); + + irq_enter(); + 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); + irq_exit(); + set_irq_regs(old_regs); +} +#else /* CONFIG_SMP */ +void doorbell_exception(struct pt_regs *regs) +{ + printk(KERN_WARNING "Received doorbell on non-smp system\n"); +} +#endif /* CONFIG_SMP */ + |