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| author |   Marc Zyngier <marc.zyngier@arm.com> | 2018-01-17 14:26:47 +0000 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2018-01-24 12:32:58 +0100 |
| commit | c5baa1be8f559d5f33c412d00cc1c86762a8bbbf (patch) | |
| tree | 40c8991b05fc7e7bb8ff4d7de0249f5b7de8e259 /Documentation/IRQ-domain.txt | |
| parent | Merge tag 'irqchip-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core (diff) | |
| download | linux-dev-c5baa1be8f559d5f33c412d00cc1c86762a8bbbf.tar.xz linux-dev-c5baa1be8f559d5f33c412d00cc1c86762a8bbbf.zip | |
irqdomain: Kill CONFIG_IRQ_DOMAIN_DEBUG
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
Diffstat (limited to 'Documentation/IRQ-domain.txt')
| -rw-r--r-- | Documentation/IRQ-domain.txt | 36 |
1 files changed, 2 insertions, 34 deletions
diff --git a/Documentation/IRQ-domain.txt b/Documentation/IRQ-domain.txt index 4a1cd7645d85..507775cce753 100644 --- a/Documentation/IRQ-domain.txt +++ b/Documentation/IRQ-domain.txt @@ -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. |