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| author |   Anup Patel <apatel@ventanamicro.com> | 2025-02-17 14:26:51 +0530 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2025-02-20 15:19:26 +0100 |
| commit | e54b1b5e89ae765e6d71d41883a8f551fde8d0ab (patch) | |
| tree | 75ce7b0cf85c88103d6aa61fbfeb55f7b0c732b0 | |
| parent | genirq: Introduce common irq_force_complete_move() implementation (diff) | |
| download | wireguard-linux-e54b1b5e89ae765e6d71d41883a8f551fde8d0ab.tar.xz wireguard-linux-e54b1b5e89ae765e6d71d41883a8f551fde8d0ab.zip | |
genirq: Introduce irq_can_move_in_process_context()
Interrupt controller drivers which enable CONFIG_GENERIC_PENDING_IRQ
require to know whether an interrupt can be moved in process context or not
to decide whether they need to invoke the work around for non-atomic MSI
updates or not.
This information can be retrieved via irq_can_move_pcntxt(). That helper
requires access to the top-most interrupt domain data, but the driver which
requires this is usually further down in the hierarchy.
Introduce irq_can_move_in_process_context() which retrieves that
information from the top-most interrupt domain data.
[ tglx: Massaged change log ]
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250217085657.789309-6-apatel@ventanamicro.com
| -rw-r--r-- | include/linux/irq.h | 2 | ||||
| -rw-r--r-- | kernel/irq/migration.c | 10 |
2 files changed, 12 insertions, 0 deletions
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..147cabb4c077 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -127,3 +127,13 @@ 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 the top level irq_data in the hierarchy, which is optimized + * away when CONFIG_IRQ_DOMAIN_HIERARCHY is disabled. + */ + data = irq_desc_get_irq_data(irq_data_to_desc(data)); + return irq_can_move_pcntxt(data); +} |