From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Sumit Garg <sumit.garg@linaro.org>,
kernel-team@android.com, Russell King <linux@arm.linux.org.uk>,
Jason Cooper <jason@lakedaemon.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Will Deacon <will@kernel.org>
Subject: [PATCH 02/11] genirq: Allow interrupts to be excluded from /proc/interrupts
Date: Tue, 19 May 2020 17:17:46 +0100 [thread overview]
Message-ID: <20200519161755.209565-3-maz@kernel.org> (raw)
In-Reply-To: <20200519161755.209565-1-maz@kernel.org>
A number of architectures implement IPI statistics directly,
bypassing the core kstat_irqs accounting. As we move IPIs to
being actual IRQs, we would end-up with a confusing display
in /proc/interrupts (where the IPIs would appear twice).
In order to solve this, allow interrupts to be flagged as
"no accounting", which excludes them from /proc/interrupts.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
include/linux/irq.h | 3 ++-
kernel/irq/debugfs.c | 1 +
kernel/irq/proc.c | 2 +-
kernel/irq/settings.h | 7 +++++++
4 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 726f94d8b8cc..4433c8e765c8 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -97,13 +97,14 @@ enum {
IRQ_PER_CPU_DEVID = (1 << 17),
IRQ_IS_POLLED = (1 << 18),
IRQ_DISABLE_UNLAZY = (1 << 19),
+ IRQ_NO_ACCOUNTING = (1 << 20),
};
#define IRQF_MODIFY_MASK \
(IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \
IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \
IRQ_PER_CPU | IRQ_NESTED_THREAD | IRQ_NOTHREAD | IRQ_PER_CPU_DEVID | \
- IRQ_IS_POLLED | IRQ_DISABLE_UNLAZY)
+ IRQ_IS_POLLED | IRQ_DISABLE_UNLAZY | IRQ_NO_ACCOUNTING)
#define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING)
diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c
index 4f9f844074db..9a22eab5537f 100644
--- a/kernel/irq/debugfs.c
+++ b/kernel/irq/debugfs.c
@@ -131,6 +131,7 @@ static const struct irq_bit_descr irqdesc_states[] = {
BIT_MASK_DESCR(_IRQ_PER_CPU_DEVID),
BIT_MASK_DESCR(_IRQ_IS_POLLED),
BIT_MASK_DESCR(_IRQ_DISABLE_UNLAZY),
+ BIT_MASK_DESCR(_IRQ_NO_ACCOUNTING),
};
static const struct irq_bit_descr irqdesc_istates[] = {
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 32c071d7bc03..87780af13c12 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -485,7 +485,7 @@ int show_interrupts(struct seq_file *p, void *v)
rcu_read_lock();
desc = irq_to_desc(i);
- if (!desc)
+ if (!desc || irq_settings_is_no_accounting(desc))
goto outsparse;
if (desc->kstat_irqs)
diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h
index e43795cd2ccf..732fc3f2c686 100644
--- a/kernel/irq/settings.h
+++ b/kernel/irq/settings.h
@@ -17,6 +17,7 @@ enum {
_IRQ_PER_CPU_DEVID = IRQ_PER_CPU_DEVID,
_IRQ_IS_POLLED = IRQ_IS_POLLED,
_IRQ_DISABLE_UNLAZY = IRQ_DISABLE_UNLAZY,
+ _IRQ_NO_ACCOUNTING = IRQ_NO_ACCOUNTING,
_IRQF_MODIFY_MASK = IRQF_MODIFY_MASK,
};
@@ -31,6 +32,7 @@ enum {
#define IRQ_PER_CPU_DEVID GOT_YOU_MORON
#define IRQ_IS_POLLED GOT_YOU_MORON
#define IRQ_DISABLE_UNLAZY GOT_YOU_MORON
+#define IRQ_NO_ACCOUNTING GOT_YOU_MORON
#undef IRQF_MODIFY_MASK
#define IRQF_MODIFY_MASK GOT_YOU_MORON
@@ -167,3 +169,8 @@ static inline void irq_settings_clr_disable_unlazy(struct irq_desc *desc)
{
desc->status_use_accessors &= ~_IRQ_DISABLE_UNLAZY;
}
+
+static inline bool irq_settings_is_no_accounting(struct irq_desc *desc)
+{
+ return desc->status_use_accessors & _IRQ_NO_ACCOUNTING;
+}
--
2.26.2
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next prev parent reply other threads:[~2020-05-19 16:19 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-19 16:17 [PATCH 00/11] arm/arm64: Turning IPIs into normal interrupts Marc Zyngier
2020-05-19 16:17 ` [PATCH 01/11] genirq: Add fasteoi IPI flow Marc Zyngier
2020-05-19 19:47 ` Florian Fainelli
2020-06-12 9:54 ` Marc Zyngier
2020-05-19 22:25 ` Valentin Schneider
2020-05-19 22:29 ` Valentin Schneider
2020-06-12 9:58 ` Marc Zyngier
2020-05-19 16:17 ` Marc Zyngier [this message]
2020-05-19 16:17 ` [PATCH 03/11] arm64: Allow IPIs to be handled as normal interrupts Marc Zyngier
2020-05-21 14:03 ` Valentin Schneider
2020-05-19 16:17 ` [PATCH 04/11] ARM: " Marc Zyngier
2020-05-19 22:24 ` Russell King - ARM Linux admin
2020-05-21 14:03 ` Valentin Schneider
2020-05-21 15:12 ` Russell King - ARM Linux admin
2020-05-21 16:11 ` Valentin Schneider
2020-05-19 16:17 ` [PATCH 05/11] irqchip/gic-v3: Describe the SGI range Marc Zyngier
2020-05-19 16:17 ` [PATCH 06/11] irqchip/gic-v3: Configure SGIs as standard interrupts Marc Zyngier
2020-05-20 9:52 ` Sumit Garg
2020-05-20 10:24 ` Marc Zyngier
2020-05-21 14:04 ` Valentin Schneider
2020-06-12 10:39 ` Marc Zyngier
2020-05-19 16:17 ` [PATCH 07/11] irqchip/gic: Refactor SMP configuration Marc Zyngier
2020-05-19 16:17 ` [PATCH 08/11] irqchip/gic: Configure SGIs as standard interrupts Marc Zyngier
2021-04-20 20:37 ` dann frazier
2021-04-20 21:25 ` dann frazier
2021-04-21 10:58 ` Marc Zyngier
2021-04-21 14:52 ` dann frazier
2021-04-21 15:49 ` Marc Zyngier
2020-05-19 16:17 ` [PATCH 09/11] irqchip/gic-common: Don't enable SGIs by default Marc Zyngier
2020-05-19 16:17 ` [PATCH 10/11] irqchip/bcm2836: Configure mailbox interrupts as standard interrupts Marc Zyngier
2020-05-19 16:17 ` [PATCH 11/11] arm64: Kill __smp_cross_call and co Marc Zyngier
2020-05-19 17:50 ` [PATCH 00/11] arm/arm64: Turning IPIs into normal interrupts Florian Fainelli
2020-05-19 19:47 ` Florian Fainelli
2020-06-12 9:49 ` Marc Zyngier
2020-06-12 16:57 ` Florian Fainelli
2020-05-19 22:25 ` Valentin Schneider
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