Commit ab7798ff authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq: Expand generic show_interrupts() 



Some archs want to print extra information for certain irq_chips which
is per irq and not per chip. Allow them to provide a chip callback to
print the chip name and the extra information.

PowerPC wants to print the LEVEL/EDGE type information. Make it configurable.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 08f1b807

include/linux/irq.h

+4 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <asm/ptrace.h>

#include <asm/irq_regs.h>



struct seq_file;

struct irq_desc;

struct irq_data;

typedef	void (*irq_flow_handler_t)(unsigned int irq,
@@ -270,6 +271,7 @@ static inline bool irqd_can_move_in_process_context(struct irq_data *d) 
 * @irq_set_wake:	enable/disable power-management wake-on of an IRQ

 * @irq_bus_lock:	function to lock access to slow bus (i2c) chips

 * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips

 * @irq_print_chip:	optional to print special chip info in show_interrupts

 * @flags:		chip specific flags

 *

 * @release:		release function solely used by UML
@@ -317,6 +319,8 @@ struct irq_chip { 
	void		(*irq_bus_lock)(struct irq_data *data);

	void		(*irq_bus_sync_unlock)(struct irq_data *data);



	void		(*irq_print_chip)(struct irq_data *data, struct seq_file *p);



	unsigned long	flags;



	/* Currently used only by UML, might disappear one day.*/

kernel/irq/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -31,6 +31,10 @@ config GENERIC_IRQ_PROBE 
config GENERIC_IRQ_SHOW

       bool



# Print level/edge extra information

config GENERIC_IRQ_SHOW_LEVEL

       bool



# Support for delayed migration from interrupt context

config GENERIC_PENDING_IRQ

	bool

kernel/irq/proc.c

+14 −1
Original line number Diff line number Diff line
@@ -404,7 +404,20 @@ int show_interrupts(struct seq_file *p, void *v) 
	seq_printf(p, "%*d: ", prec, i);

	for_each_online_cpu(j)

		seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));



	if (desc->irq_data.chip) {

		if (desc->irq_data.chip->irq_print_chip)

			desc->irq_data.chip->irq_print_chip(&desc->irq_data, p);

		else if (desc->irq_data.chip->name)

			seq_printf(p, " %8s", desc->irq_data.chip->name);

		else

			seq_printf(p, " %8s", "-");

	} else {

		seq_printf(p, " %8s", "None");

	}

#ifdef CONFIG_GENIRC_IRQ_SHOW_LEVEL

	seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");

#endif

	if (desc->name)

		seq_printf(p, "-%-8s", desc->name);

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