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irqdomain: Kill CONFIG_IRQ_DOMAIN_DEBUG

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CONFIG_IRQ_DOMAIN_DEBUG is similar to CONFIG_GENERIC_IRQ_DEBUGFS,
just with less information.

Spring cleanup time.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Yang Shunyong <shunyong.yang@hxt-semitech.com>
Link: https://lkml.kernel.org/r/20180117142647.23622-1-marc.zyngier@arm.com
This commit is contained in:
Marc Zyngier 2018-01-17 14:26:47 +00:00 committed by Thomas Gleixner
parent 80023aea83
commit c5baa1be8f
21 changed files with 2 additions and 180 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
Documentation/IRQ-domain.txt
View File

@ -265,37 +265,5 @@ support other architectures, such as ARM, ARM64 etc.
=== Debugging ===
If you switch on CONFIG_IRQ_DOMAIN_DEBUG (which depends on
CONFIG_IRQ_DOMAIN and CONFIG_DEBUG_FS), you will find a new file in
your debugfs mount point, called irq_domain_mapping. This file
contains a live snapshot of all the IRQ domains in the system:
name mapped linear-max direct-max devtree-node
pl061 8 8 0 /smb/gpio@e0080000
pl061 8 8 0 /smb/gpio@e1050000
pMSI 0 0 0 /interrupt-controller@e1101000/v2m@e0080000
MSI 37 0 0 /interrupt-controller@e1101000/v2m@e0080000
GICv2m 37 0 0 /interrupt-controller@e1101000/v2m@e0080000
GICv2 448 448 0 /interrupt-controller@e1101000
it also iterates over the interrupts to display their mapping in the
domains, and makes the domain stacking visible:
irq hwirq chip name chip data active type domain
1 0x00019 GICv2 0xffff00000916bfd8 * LINEAR GICv2
2 0x0001d GICv2 0xffff00000916bfd8 LINEAR GICv2
3 0x0001e GICv2 0xffff00000916bfd8 * LINEAR GICv2
4 0x0001b GICv2 0xffff00000916bfd8 * LINEAR GICv2
5 0x0001a GICv2 0xffff00000916bfd8 LINEAR GICv2
[...]
96 0x81808 MSI 0x (null) RADIX MSI
96+ 0x00063 GICv2m 0xffff8003ee116980 RADIX GICv2m
96+ 0x00063 GICv2 0xffff00000916bfd8 LINEAR GICv2
97 0x08800 MSI 0x (null) * RADIX MSI
97+ 0x00064 GICv2m 0xffff8003ee116980 * RADIX GICv2m
97+ 0x00064 GICv2 0xffff00000916bfd8 * LINEAR GICv2
Here, interrupts 1-5 are only using a single domain, while 96 and 97
are build out of a stack of three domain, each level performing a
particular function.
Most of the internals of the IRQ subsystem are exposed in debugfs by
turning CONFIG_GENERIC_IRQ_DEBUGFS on.

1
arch/arm/configs/aspeed_g4_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_KERNEL_XZ=y
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_LOG_BUF_SHIFT=14

1
arch/arm/configs/aspeed_g5_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_KERNEL_XZ=y
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_LOG_BUF_SHIFT=14

1
arch/arm/configs/hisi_defconfig
View File

@ -1,4 +1,3 @@
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BLK_DEV_INITRD=y

1
arch/arm/configs/multi_v7_defconfig
View File

@ -1,6 +1,5 @@
CONFIG_SYSVIPC=y
CONFIG_FHANDLE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_CGROUPS=y

1
arch/arm/configs/mvebu_v7_defconfig
View File

@ -1,6 +1,5 @@
CONFIG_SYSVIPC=y
CONFIG_FHANDLE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_BLK_DEV_INITRD=y

1
arch/arm/configs/pxa_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_FHANDLE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BSD_PROCESS_ACCT=y

1
arch/arm/configs/sama5_defconfig
View File

@ -2,7 +2,6 @@
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_FHANDLE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_LOG_BUF_SHIFT=14

1
arch/arm/configs/tegra_defconfig
View File

@ -1,5 +1,4 @@
CONFIG_SYSVIPC=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y

1
arch/arm/configs/vt8500_v6_v7_defconfig
View File

@ -1,4 +1,3 @@
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BLK_DEV_INITRD=y

1
arch/powerpc/configs/fsl-emb-nonhw.config
View File

@ -71,7 +71,6 @@ CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_SCTP=m
CONFIG_IPV6=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_ISO9660_FS=m
CONFIG_JFFS2_FS_DEBUG=1
CONFIG_JFFS2_FS=y

1
arch/powerpc/configs/powernv_defconfig
View File

@ -4,7 +4,6 @@ CONFIG_CPU_LITTLE_ENDIAN=y
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_AUDIT=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_TASKSTATS=y

1
arch/powerpc/configs/ppc64_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_PPC64=y
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_TASKSTATS=y

1
arch/powerpc/configs/pseries_defconfig
View File

@ -3,7 +3,6 @@ CONFIG_NR_CPUS=2048
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_AUDIT=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_TASKSTATS=y

1
arch/xtensa/configs/audio_kc705_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_FHANDLE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IRQ_TIME_ACCOUNTING=y

1
arch/xtensa/configs/cadence_csp_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_USELIB=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IRQ_TIME_ACCOUNTING=y

1
arch/xtensa/configs/generic_kc705_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_FHANDLE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IRQ_TIME_ACCOUNTING=y

1
arch/xtensa/configs/nommu_kc705_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_FHANDLE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IRQ_TIME_ACCOUNTING=y

1
arch/xtensa/configs/smp_lx200_defconfig
View File

@ -1,7 +1,6 @@
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_FHANDLE=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IRQ_TIME_ACCOUNTING=y

10
kernel/irq/Kconfig
View File

@ -103,16 +103,6 @@ config GENERIC_IRQ_MATRIX_ALLOCATOR
config GENERIC_IRQ_RESERVATION_MODE
bool
config IRQ_DOMAIN_DEBUG
bool "Expose hardware/virtual IRQ mapping via debugfs"
depends on IRQ_DOMAIN && DEBUG_FS
help
This option will show the mapping relationship between hardware irq
numbers and Linux irq numbers. The mapping is exposed via debugfs
in the file "irq_domain_mapping".
If you don't know what this means you don't need it.
# Support forced irq threading
config IRQ_FORCED_THREADING
bool

118
kernel/irq/irqdomain.c
View File

@ -897,124 +897,6 @@ unsigned int irq_find_mapping(struct irq_domain *domain,
}
EXPORT_SYMBOL_GPL(irq_find_mapping);
#ifdef CONFIG_IRQ_DOMAIN_DEBUG
static void virq_debug_show_one(struct seq_file *m, struct irq_desc *desc)
{
struct irq_domain *domain;
struct irq_data *data;
domain = desc->irq_data.domain;
data = &desc->irq_data;
while (domain) {
unsigned int irq = data->irq;
unsigned long hwirq = data->hwirq;
struct irq_chip *chip;
bool direct;
if (data == &desc->irq_data)
seq_printf(m, "%5d ", irq);
else
seq_printf(m, "%5d+ ", irq);
seq_printf(m, "0x%05lx ", hwirq);
chip = irq_data_get_irq_chip(data);
seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none");
seq_printf(m, "0x%p ", irq_data_get_irq_chip_data(data));
seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' ');
direct = (irq == hwirq) && (irq < domain->revmap_direct_max_irq);
seq_printf(m, "%6s%-8s ",
(hwirq < domain->revmap_size) ? "LINEAR" : "RADIX",
direct ? "(DIRECT)" : "");
seq_printf(m, "%s\n", domain->name);
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
domain = domain->parent;
data = data->parent_data;
#else
domain = NULL;
#endif
}
}
static int virq_debug_show(struct seq_file *m, void *private)
{
unsigned long flags;
struct irq_desc *desc;
struct irq_domain *domain;
struct radix_tree_iter iter;
void __rcu **slot;
int i;
seq_printf(m, " %-16s %-6s %-10s %-10s %s\n",
"name", "mapped", "linear-max", "direct-max", "devtree-node");
mutex_lock(&irq_domain_mutex);
list_for_each_entry(domain, &irq_domain_list, link) {
struct device_node *of_node;
const char *name;
int count = 0;
of_node = irq_domain_get_of_node(domain);
if (of_node)
name = of_node_full_name(of_node);
else if (is_fwnode_irqchip(domain->fwnode))
name = container_of(domain->fwnode, struct irqchip_fwid,
fwnode)->name;
else
name = "";
radix_tree_for_each_slot(slot, &domain->revmap_tree, &iter, 0)
count++;
seq_printf(m, "%c%-16s %6u %10u %10u %s\n",
domain == irq_default_domain ? '*' : ' ', domain->name,
domain->revmap_size + count, domain->revmap_size,
domain->revmap_direct_max_irq,
name);
}
mutex_unlock(&irq_domain_mutex);
seq_printf(m, "%-5s %-7s %-15s %-*s %6s %-14s %s\n", "irq", "hwirq",
"chip name", (int)(2 * sizeof(void *) + 2), "chip data",
"active", "type", "domain");
for (i = 1; i < nr_irqs; i++) {
desc = irq_to_desc(i);
if (!desc)
continue;
raw_spin_lock_irqsave(&desc->lock, flags);
virq_debug_show_one(m, desc);
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
return 0;
}
static int virq_debug_open(struct inode *inode, struct file *file)
{
return single_open(file, virq_debug_show, inode->i_private);
}
static const struct file_operations virq_debug_fops = {
.open = virq_debug_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init irq_debugfs_init(void)
{
if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL,
NULL, &virq_debug_fops) == NULL)
return -ENOMEM;
return 0;
}
__initcall(irq_debugfs_init);
#endif /* CONFIG_IRQ_DOMAIN_DEBUG */
/**
* irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
*