From: "irqchip-bot for Samuel Holland" <tip-bot2@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: Samuel Holland <samuel@sholland.org>,
Marc Zyngier <maz@kernel.org>,
tglx@linutronix.de
Subject: [irqchip: irq/irqchip-next] genirq: Provide an IRQ affinity mask in non-SMP configs
Date: Thu, 07 Jul 2022 08:50:00 -0000 [thread overview]
Message-ID: <165718380003.15455.9821341691594991462.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20220701200056.46555-9-samuel@sholland.org>
The following commit has been merged into the irq/irqchip-next branch of irqchip:
Commit-ID: aa0813581b8d37bdd91cd40b67ef79ffa45104b2
Gitweb: https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/aa0813581b8d37bdd91cd40b67ef79ffa45104b2
Author: Samuel Holland <samuel@sholland.org>
AuthorDate: Fri, 01 Jul 2022 15:00:56 -05:00
Committer: Marc Zyngier <maz@kernel.org>
CommitterDate: Thu, 07 Jul 2022 09:38:04 +01:00
genirq: Provide an IRQ affinity mask in non-SMP configs
IRQ affinity masks are not allocated in uniprocessor configurations.
This requires special case non-SMP code in drivers for irqchips which
have per-CPU enable or mask registers.
Since IRQ affinity is always the same in a uniprocessor configuration,
we can provide a correct affinity mask without allocating one per IRQ.
By returning a real cpumask from irq_data_get_affinity_mask even when
SMP is disabled, irqchip drivers which iterate over that mask will
automatically do the right thing.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220701200056.46555-9-samuel@sholland.org
---
include/linux/irq.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 02073f7..996e227 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -151,7 +151,9 @@ struct irq_common_data {
#endif
void *handler_data;
struct msi_desc *msi_desc;
+#ifdef CONFIG_SMP
cpumask_var_t affinity;
+#endif
#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
cpumask_var_t effective_affinity;
#endif
@@ -882,13 +884,19 @@ static inline int irq_data_get_node(struct irq_data *d)
static inline
const struct cpumask *irq_data_get_affinity_mask(struct irq_data *d)
{
+#ifdef CONFIG_SMP
return d->common->affinity;
+#else
+ return cpumask_of(0);
+#endif
}
static inline void irq_data_update_affinity(struct irq_data *d,
const struct cpumask *m)
{
+#ifdef CONFIG_SMP
cpumask_copy(d->common->affinity, m);
+#endif
}
static inline const struct cpumask *irq_get_affinity_mask(int irq)
prev parent reply other threads:[~2022-07-07 8:50 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-01 20:00 [PATCH v3 0/8] genirq: Provide real IRQ affinity masks in non-SMP configs Samuel Holland
2022-07-01 20:00 ` [PATCH v3 1/8] irqchip/mips-gic: Only register IPI domain when SMP is enabled Samuel Holland
2022-07-05 13:52 ` Serge Semin
2022-07-07 8:22 ` Marc Zyngier
2022-07-07 10:45 ` Serge Semin
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 2/8] genirq: GENERIC_IRQ_IPI depends on SMP Samuel Holland
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 3/8] genirq: GENERIC_IRQ_EFFECTIVE_AFF_MASK " Samuel Holland
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 4/8] genirq: Drop redundant irq_init_effective_affinity Samuel Holland
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 5/8] genirq: Refactor accessors to use irq_data_get_affinity_mask Samuel Holland
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 6/8] genirq: Add and use an irq_data_update_affinity helper Samuel Holland
2022-07-03 15:22 ` Oleksandr
2022-07-07 8:39 ` Marc Zyngier
2022-07-07 9:37 ` Oleksandr Tyshchenko
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 7/8] genirq: Return a const cpumask from irq_data_get_affinity_mask Samuel Holland
2022-07-03 14:57 ` Michael Kelley (LINUX)
2022-07-03 15:04 ` Andy Shevchenko
2022-07-07 8:50 ` [irqchip: irq/irqchip-next] " irqchip-bot for Samuel Holland
2022-07-01 20:00 ` [PATCH v3 8/8] genirq: Provide an IRQ affinity mask in non-SMP configs Samuel Holland
2022-07-07 8:50 ` irqchip-bot for Samuel Holland [this message]
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