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genirq/debugfs: Print irqdomain flags as human-readable strings

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Improve the readability of irqdomain debugging information in debugfs by
printing the flags field of domain files as human-readable strings instead
of a raw bitmask, which aligned with the existing style used for irqchip
flags in the irq debug files.

Before:
	#cat :cpus:cpu@0:interrupt-controller
	name:   :cpus:cpu@0:interrupt-controller
	 size:   0
	 mapped: 2
	 flags:  0x00000003

After:
	#cat :cpus:cpu@0:interrupt-controller
	name:   :cpus:cpu@0:interrupt-controller
	 size:   0
	 mapped: 3
	 flags:  0x00000003
	            IRQ_DOMAIN_FLAG_HIERARCHY
	            IRQ_DOMAIN_NAME_ALLOCATED

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240529091628.3666379-1-ruanjinjie@huawei.com
This commit is contained in:
Jinjie Ruan 2024-05-29 09:16:28 +00:00 committed by Thomas Gleixner
parent 540588772e
commit cb06c98269
3 changed files with 27 additions and 10 deletions
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10
kernel/irq/debugfs.c
View File

@ -9,14 +9,8 @@
static struct dentry *irq_dir;
struct irq_bit_descr {
unsigned int mask;
char *name;
};
#define BIT_MASK_DESCR(m) { .mask = m, .name = #m }
static void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state,
const struct irq_bit_descr *sd, int size)
void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state,
const struct irq_bit_descr *sd, int size)
{
int i;

10
kernel/irq/internals.h
View File

@ -501,6 +501,16 @@ static inline struct irq_data *irqd_get_parent_data(struct irq_data *irqd)
#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
#include <linux/debugfs.h>
struct irq_bit_descr {
unsigned int mask;
char *name;
};
#define BIT_MASK_DESCR(m) { .mask = m, .name = #m }
void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state,
const struct irq_bit_descr *sd, int size);
void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc);
static inline void irq_remove_debugfs_entry(struct irq_desc *desc)
{

17
kernel/irq/irqdomain.c
View File

@ -1932,13 +1932,26 @@ static void irq_domain_free_one_irq(struct irq_domain *domain, unsigned int virq
static struct dentry *domain_dir;
static void
irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
static const struct irq_bit_descr irqdomain_flags[] = {
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_HIERARCHY),
BIT_MASK_DESCR(IRQ_DOMAIN_NAME_ALLOCATED),
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_IPI_PER_CPU),
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_IPI_SINGLE),
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_MSI),
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_ISOLATED_MSI),
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_NO_MAP),
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_MSI_PARENT),
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_MSI_DEVICE),
BIT_MASK_DESCR(IRQ_DOMAIN_FLAG_NONCORE),
};
static void irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
{
seq_printf(m, "%*sname: %s\n", ind, "", d->name);
seq_printf(m, "%*ssize: %u\n", ind + 1, "", d->revmap_size);
seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
irq_debug_show_bits(m, ind, d->flags, irqdomain_flags, ARRAY_SIZE(irqdomain_flags));
if (d->ops && d->ops->debug_show)
d->ops->debug_show(m, d, NULL, ind + 1);
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY