From: John Garry <john.garry@huawei.com>
To: <gregkh@linuxfoundation.org>, <rafael@kernel.org>,
<martin.petersen@oracle.com>, <jejb@linux.ibm.com>,
<tglx@linutronix.de>
Cc: <linuxarm@huawei.com>, <linux-scsi@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <maz@kernel.org>,
John Garry <john.garry@huawei.com>
Subject: [PATCH v2 1/3] genirq/affinity: Add irq_update_affinity_desc()
Date: Wed, 28 Oct 2020 20:33:05 +0800 [thread overview]
Message-ID: <1603888387-52499-2-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1603888387-52499-1-git-send-email-john.garry@huawei.com>
Add a function to allow the affinity of an interrupt be switched to
managed, such that interrupts allocated for platform devices may be
managed.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Garry <john.garry@huawei.com>
---
include/linux/interrupt.h | 8 ++++++++
kernel/irq/manage.c | 19 +++++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index ee8299eb1f52..870b3251e174 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -352,6 +352,8 @@ extern int irq_can_set_affinity(unsigned int irq);
extern int irq_select_affinity(unsigned int irq);
extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m);
+extern int irq_update_affinity_desc(unsigned int irq,
+ struct irq_affinity_desc *affinity);
extern int
irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
@@ -387,6 +389,12 @@ static inline int irq_set_affinity_hint(unsigned int irq,
return -EINVAL;
}
+static inline int irq_update_affinity_desc(unsigned int irq,
+ struct irq_affinity_desc *affinity)
+{
+ return -EINVAL;
+}
+
static inline int
irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify)
{
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index c460e0496006..b96af4cde4bc 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -371,6 +371,25 @@ int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask,
return ret;
}
+int irq_update_affinity_desc(unsigned int irq,
+ struct irq_affinity_desc *affinity)
+{
+ unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
+
+ if (!desc)
+ return -EINVAL;
+
+ if (affinity->is_managed) {
+ irqd_set(&desc->irq_data, IRQD_AFFINITY_MANAGED);
+ irqd_set(&desc->irq_data, IRQD_MANAGED_SHUTDOWN);
+ }
+
+ cpumask_copy(desc->irq_common_data.affinity, &affinity->mask);
+ irq_put_desc_unlock(desc, flags);
+ return 0;
+}
+
int __irq_set_affinity(unsigned int irq, const struct cpumask *mask, bool force)
{
struct irq_desc *desc = irq_to_desc(irq);
--
2.26.2
next prev parent reply other threads:[~2020-10-29 1:05 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 12:33 [PATCH v2 0/3] Support managed interrupts for platform devices John Garry
2020-10-28 12:33 ` John Garry [this message]
2020-10-28 18:22 ` [PATCH v2 1/3] genirq/affinity: Add irq_update_affinity_desc() Thomas Gleixner
2020-11-02 17:32 ` John Garry
2020-11-02 20:35 ` Thomas Gleixner
2020-11-17 21:28 ` Thomas Gleixner
2020-11-18 11:34 ` John Garry
2020-11-18 20:38 ` Thomas Gleixner
2020-11-19 9:31 ` John Garry
2020-11-19 18:09 ` Thomas Gleixner
2020-11-19 19:56 ` John Garry
2020-11-19 21:03 ` Thomas Gleixner
2020-11-20 11:52 ` John Garry
2020-11-22 13:38 ` Marc Zyngier
2020-11-23 12:54 ` John Garry
2020-11-23 13:26 ` Marc Zyngier
2020-11-23 15:45 ` John Garry
2020-11-24 16:51 ` Marc Zyngier
2020-11-24 17:38 ` John Garry
2020-11-25 18:35 ` Marc Zyngier
2020-11-26 10:47 ` John Garry
2020-11-26 11:08 ` Marc Zyngier
2020-11-26 11:29 ` John Garry
2020-11-26 16:52 ` John Garry
2020-11-27 9:57 ` Marc Zyngier
2020-11-27 12:45 ` John Garry
2020-11-27 12:49 ` Marc Zyngier
2020-10-28 12:33 ` [PATCH v2 2/3] Driver core: platform: Add platform_get_irqs_affinity() John Garry
2020-10-28 12:33 ` [PATCH v2 3/3] scsi: hisi_sas: Expose HW queues for v2 hw John Garry
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