Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
48 lines
1006 B
C
48 lines
1006 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();
|
|
|
|
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 */
|