diff options
| author | Palmer Dabbelt <palmer@sifive.com> | 2018-03-07 15:57:27 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-03-14 21:46:29 +0100 |
| commit | caacdbf4aa567ab5e8de1a4070195c5d3e8f1340 (patch) | |
| tree | 00581368a1141b284bd779da0b779c33984a5542 /kernel/irq | |
| parent | b0d8bef8ed805ca92eb91e86acf3ce89cbebc8ce (diff) | |
| download | linux-caacdbf4aa567ab5e8de1a4070195c5d3e8f1340.tar.bz2 | |
genirq: Add CONFIG_GENERIC_IRQ_MULTI_HANDLER
The arm multi irq handler registration mechanism has been copied into a
handful of architectures, including arm64 and openrisc. RISC-V needs the
same mechanism.
Instead of adding yet another copy for RISC-V copy the arm implementation
into the core code depending on a new Kconfig symbol:
CONFIG_GENERIC_MULTI_IRQ_HANDLER.
Subsequent patches will convert the various architectures.
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: jonas@southpole.se
Cc: catalin.marinas@arm.com
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux@armlinux.org.uk
Cc: stefan.kristiansson@saunalahti.fi
Cc: openrisc@lists.librecores.org
Cc: shorne@gmail.com
Cc: linux-riscv@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lkml.kernel.org/r/20180307235731.22627-2-palmer@sifive.com
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/Kconfig | 5 | ||||
| -rw-r--r-- | kernel/irq/handle.c | 15 |
2 files changed, 20 insertions, 0 deletions
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 6fc87ccda1d7..5f3e2baefca9 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -132,3 +132,8 @@ config GENERIC_IRQ_DEBUGFS If you don't know what to do here, say N. endmenu + +config GENERIC_IRQ_MULTI_HANDLER + bool + help + Allow to specify the low level IRQ handler at run time. diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index 79f987b942b8..3570c715c3e7 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -20,6 +20,10 @@ #include "internals.h" +#ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER +void (*handle_arch_irq)(struct pt_regs *) __ro_after_init; +#endif + /** * handle_bad_irq - handle spurious and unhandled irqs * @desc: description of the interrupt @@ -207,3 +211,14 @@ irqreturn_t handle_irq_event(struct irq_desc *desc) irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS); return ret; } + +#ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER +int __init set_handle_irq(void (*handle_irq)(struct pt_regs *)) +{ + if (handle_arch_irq) + return -EBUSY; + + handle_arch_irq = handle_irq; + return 0; +} +#endif |