diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2021-04-02 08:23:25 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2021-05-17 20:01:35 +0200 |
| commit | c2b1063e8feb2115537addce10f36c0c82d11d9b (patch) | |
| tree | 13b7ad872a31852d967f1869e4feeb0e2cbbf227 /include/linux | |
| parent | d07f6ca923ea0927a1024dfccafc5b53b61cfecc (diff) | |
genirq: Add a IRQF_NO_DEBUG flag
The whole call to note_interrupt() can be avoided or return early when
interrupts would be marked accordingly. For IPI handlers which always
return HANDLED the whole procedure is pretty pointless to begin with.
Add a IRQF_NO_DEBUG flag and mark the interrupt accordingly if supplied
when the interrupt is requested.
When noirqdebug is set on the kernel commandline, then the interrupt is
marked unconditionally so that there is only one condition in the hotpath
to evaluate.
[ clg: Add changelog ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/7a8ad02f-63a8-c1aa-fdd1-39d973593d02@kaod.org
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/interrupt.h | 3 | ||||
| -rw-r--r-- | include/linux/irq.h | 2 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 4777850a6dc7..a52109c3f3a4 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -64,6 +64,8 @@ * IRQF_NO_AUTOEN - Don't enable IRQ or NMI automatically when users request it. * Users will enable it explicitly by enable_irq() or enable_nmi() * later. + * IRQF_NO_DEBUG - Exclude from runnaway detection for IPI and similar handlers, + * depends on IRQF_PERCPU. */ #define IRQF_SHARED 0x00000080 #define IRQF_PROBE_SHARED 0x00000100 @@ -78,6 +80,7 @@ #define IRQF_EARLY_RESUME 0x00020000 #define IRQF_COND_SUSPEND 0x00040000 #define IRQF_NO_AUTOEN 0x00080000 +#define IRQF_NO_DEBUG 0x00100000 #define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND | IRQF_NO_THREAD) diff --git a/include/linux/irq.h b/include/linux/irq.h index 31b347c9f8dd..8e9a9ae471a6 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -72,6 +72,7 @@ enum irqchip_irq_state; * mechanism and from core side polling. * IRQ_DISABLE_UNLAZY - Disable lazy irq disable * IRQ_HIDDEN - Don't show up in /proc/interrupts + * IRQ_NO_DEBUG - Exclude from note_interrupt() debugging */ enum { IRQ_TYPE_NONE = 0x00000000, @@ -99,6 +100,7 @@ enum { IRQ_IS_POLLED = (1 << 18), IRQ_DISABLE_UNLAZY = (1 << 19), IRQ_HIDDEN = (1 << 20), + IRQ_NO_DEBUG = (1 << 21), }; #define IRQF_MODIFY_MASK \ |