Commit 63f9ef21 authored by Jinjie Ruan's avatar Jinjie Ruan
Browse files

arm64: Add debugfs dir for xint 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/release-management/issues/IB6JLE



--------------------------------

Add a debugfs dir for xint, so we can get the xint irq information
such as 'which interrupts are currently in xint state' with
following cmd:

	# ls /sys/kernel/debug/irq/xints

Signed-off-by: default avatarJinjie Ruan <ruanjinjie@huawei.com>
parent 3053668e

drivers/irqchip/irq-gic-v3.c

+6 −0
Original line number Diff line number Diff line
@@ -35,6 +35,10 @@ 


#include "irq-gic-common.h"



#ifdef CONFIG_FAST_IRQ

#include "../../../kernel/irq/internals.h"

#endif



#define GICD_INT_NMI_PRI	(GICD_INT_DEF_PRI & ~0x80)



#define FLAGS_WORKAROUND_GICR_WAKER_MSM8996	(1ULL << 0)
@@ -1017,9 +1021,11 @@ static bool xint_transform(int irqno, enum xint_op op) 
	switch (op) {

	case IRQ_TO_XINT:

		set_bit(hwirq, irqnr_xint_map);

		xint_add_debugfs_entry(irqno);

		return true;

	case XINT_TO_IRQ:

		clear_bit(hwirq, irqnr_xint_map);

		xint_remove_debugfs_entry(irqno);

		return false;

	case XINT_SET_CHECK:

		return test_bit(hwirq, irqnr_xint_map);

kernel/irq/debugfs.c

+33 −0
Original line number Diff line number Diff line
@@ -242,6 +242,34 @@ void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc) 
						 &dfs_irq_ops);

}



#ifdef CONFIG_FAST_IRQ

static struct dentry *xint_dir;



void xint_add_debugfs_entry(unsigned int irq)

{

	char name[10];

	char buf[100];



	if (!xint_dir)

		return;



	sprintf(name, "%d", irq);

	sprintf(buf, "../irqs/%d", irq);

	debugfs_create_symlink(name, xint_dir, buf);

}



void xint_remove_debugfs_entry(unsigned int irq)

{

	char name[10];



	if (!xint_dir)

		return;



	sprintf(name, "%d", irq);

	debugfs_lookup_and_remove(name, xint_dir);

}

#endif



static int __init irq_debugfs_init(void)

{

	struct dentry *root_dir;
@@ -253,6 +281,11 @@ static int __init irq_debugfs_init(void) 


	irq_dir = debugfs_create_dir("irqs", root_dir);



#ifdef CONFIG_FAST_IRQ

	if (is_xint_support)

		xint_dir = debugfs_create_dir("xints", root_dir);

#endif



	irq_lock_sparse();

	for_each_active_irq(irq)

		irq_add_debugfs_entry(irq, irq_to_desc(irq));

kernel/irq/internals.h

+18 −0
Original line number Diff line number Diff line
@@ -500,6 +500,14 @@ static inline void irq_remove_debugfs_entry(struct irq_desc *desc) 
	debugfs_remove(desc->debugfs_file);

	kfree(desc->dev_name);

}



#ifdef CONFIG_FAST_IRQ

extern bool is_xint_support;



void xint_add_debugfs_entry(unsigned int irq);

void xint_remove_debugfs_entry(unsigned int irq);

#endif



void irq_debugfs_copy_devname(int irq, struct device *dev);

# ifdef CONFIG_IRQ_DOMAIN

void irq_domain_debugfs_init(struct dentry *root);
@@ -515,6 +523,16 @@ static inline void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *d) 
static inline void irq_remove_debugfs_entry(struct irq_desc *d)

{

}



#ifdef CONFIG_FAST_IRQ

static inline void xint_add_debugfs_entry(unsigned int irq)

{

}

static inline void xint_remove_debugfs_entry(unsigned int irq)

{

}

#endif



static inline void irq_debugfs_copy_devname(int irq, struct device *dev)

{

}