Messages in this thread Patch in this message |  | | From | Anup Patel <> | | Subject | [PATCH v5 05/11] genirq: Introduce irq_can_move_in_process_context() | | Date | Sun, 9 Feb 2025 09:46:49 +0530 |
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The interrupt controller drivers which use GENERIC_PENDING_IRQ can move interrupts in process context for downstrean devices which support atomic MSI configuration.
Introduce irq_can_move_in_process_context() which allows interrupt controller drivers to test whether a particular interrupt can be moved process context.
Signed-off-by: Anup Patel <apatel@ventanamicro.com> --- include/linux/irq.h | 2 ++ kernel/irq/migration.c | 11 +++++++++++ 2 files changed, 13 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h index 56f6583093d2..dd5df1e2d032 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -615,6 +615,7 @@ extern int irq_affinity_online_cpu(unsigned int cpu); #endif #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ) +bool irq_can_move_in_process_context(struct irq_data *data); void __irq_move_irq(struct irq_data *data); static inline void irq_move_irq(struct irq_data *data) { @@ -623,6 +624,7 @@ static inline void irq_move_irq(struct irq_data *data) } void irq_move_masked_irq(struct irq_data *data); #else +static inline bool irq_can_move_in_process_context(struct irq_data *data) { return true; } static inline void irq_move_irq(struct irq_data *data) { } static inline void irq_move_masked_irq(struct irq_data *data) { } #endif diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c index e110300ad650..5acea2ac57be 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -127,3 +127,14 @@ void __irq_move_irq(struct irq_data *idata) if (!masked) idata->chip->irq_unmask(idata); } + +bool irq_can_move_in_process_context(struct irq_data *data) +{ + /* + * Get top level irq_data when CONFIG_IRQ_DOMAIN_HIERARCHY is enabled, + * and it should be optimized away when CONFIG_IRQ_DOMAIN_HIERARCHY is + * disabled. So we avoid an "#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY" here. + */ + data = irq_desc_get_irq_data(irq_data_to_desc(data)); + return irq_can_move_pcntxt(data); +} -- 2.43.0
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