kernel/linux.git/include/linux/irq.h, branch v6.19.11

genirq: Kill irq_{g,s}et_percpu_devid_partition()

2025-10-27T16:16:37+00:00

These two helpers do not have any user anymore, and can be removed, together with the affinity field kept in the irqdesc structure. Signed-off-by: Marc Zyngier Signed-off-by: Thomas Gleixner Tested-by: Will Deacon Link: https://patch.msgid.link/20251020122944.3074811-25-maz@kernel.org

genirq: Kill handle_percpu_devid_fasteoi_nmi()

2025-10-27T16:16:34+00:00

There is no in-tree user of this flow handler anymore, so simply remove it. Suggested-by: Will Deacon Signed-off-by: Marc Zyngier Signed-off-by: Thomas Gleixner Tested-by: Will Deacon Link: https://patch.msgid.link/20251020122944.3074811-12-maz@kernel.org

genirq: Add irq_chip_(startup/shutdown)_parent()

2025-08-23T19:20:25+00:00

As the MSI controller on SG2044 uses PLIC as the underlying interrupt controller, it needs to call irq_enable() and irq_disable() to startup/shutdown interrupts. Otherwise, the MSI interrupt can not be startup correctly and will not respond any incoming interrupt. Introduce irq_chip_startup_parent() and irq_chip_shutdown_parent() to allow the interrupt controller to call the irq_startup()/irq_shutdown() callbacks of the parent interrupt chip. In case the irq_startup()/irq_shutdown() callbacks are not implemented for the parent interrupt chip, this will fallback to irq_chip_enable_parent() or irq_chip_disable_parent(). Suggested-by: Thomas Gleixner Signed-off-by: Inochi Amaoto Signed-off-by: Thomas Gleixner Tested-by: Chen Wang # Pioneerbox Reviewed-by: Chen Wang Link: https://lore.kernel.org/all/20250813232835.43458-2-inochiama@gmail.com Link: https://lore.kernel.org/lkml/20250722224513.22125-1-inochiama@gmail.com/

genirq: Remove GENERIC_IRQ_LEGACY

2025-08-23T17:46:04+00:00

IA64 is gone and with it the last GENERIC_IRQ_LEGACY user. Remove GENERIC_IRQ_LEGACY. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250814165949.hvtP03r4@linutronix.de

Merge tag 'irq-drivers-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-05-27T15:00:46+00:00

Pull irq controller updates from Thomas Gleixner: "Update for interrupt chip drivers: - Convert the generic interrupt chip to lock guards to remove copy & pasta boilerplate code and gotos. - A new driver fot the interrupt controller in the EcoNet EN751221 MIPS SoC. - Extend the SG2042-MSI driver to support the new SG2044 SoC - Updates and cleanups for the (ancient) VT8500 driver - Improve the scalability of the ARM GICV4.1 ITS driver by utilizing node local copies a VM's interrupt translation table when possible. This results in a 12% reduction of VM IPI latency in certain workloads. - The usual cleanups and improvements all over the place" * tag 'irq-drivers-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits) irqchip/irq-pruss-intc: Simplify chained interrupt handler setup irqchip/gic-v4.1: Use local 4_1 ITS to generate VSGI irqchip/econet-en751221: Switch to of_fwnode_handle() irqchip/irq-vt8500: Switch to irq_domain_create_*() irqchip/econet-en751221: Switch to irq_domain_create_linear() irqchip/irq-vt8500: Use fewer global variables and add error handling irqchip/irq-vt8500: Use a dedicated chained handler function irqchip/irq-vt8500: Don't require 8 interrupts from a chained controller irqchip/irq-vt8500: Drop redundant copy of the device node pointer irqchip/irq-vt8500: Split up ack/mask functions irqchip/sg2042-msi: Fix wrong type cast in sg2044_msi_irq_ack() irqchip/sg2042-msi: Add the Sophgo SG2044 MSI interrupt controller irqchip/sg2042-msi: Introduce configurable chipinfo for SG2042 irqchip/sg2042-msi: Rename functions and data structures to be SG2042 agnostic dt-bindings: interrupt-controller: Add Sophgo SG2044 MSI controller genirq/generic-chip: Fix incorrect lock guard conversions genirq/generic-chip: Remove unused lock wrappers irqchip: Convert generic irqchip locking to guards gpio: mvebu: Convert generic irqchip locking to guard() ARM: orion/gpio:: Convert generic irqchip locking to guard() ...

genirq: Remove unused remove_percpu_irq()

2025-05-07T09:35:41+00:00

remove_percpu_irq() has been unused since it was added in 2011 by commit 31d9d9b6d830 ("genirq: Add support for per-cpu dev_id interrupts") Remove it. Signed-off-by: Dr. David Alan Gilbert Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250420164656.112641-1-linux@treblig.org

genirq/manage: Rework can_request_irq()

2025-05-07T07:08:15+00:00

Use the new guards to get and lock the interrupt descriptor and tidy up the code. Make the return value boolean to reflect it's meaning. No functional change. Signed-off-by: Thomas Gleixner Acked-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/all/20250429065422.187250840@linutronix.de

genirq/generic-chip: Remove unused lock wrappers

2025-04-07T07:43:20+00:00

All users are converted to lock guards. Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250313142524.388478168@linutronix.de

genirq/generic-chip: Make locking unconditional

2025-04-07T07:43:19+00:00

The SMP conditional wrappers around raw_spin_[un]lock() have no real value. On !SMP kernels the lock operations are NOOPs except for a preempt_disable/enable() pair on PREEMPT enabled kernels, which are not really worth to optimize for. Aside of that this evades lockdep on !SMP kernels. Remove the !SMP stubs and make it unconditional. No functional change. Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250313142524.011345765@linutronix.de

genirq: Introduce irq_can_move_in_process_context()

2025-02-20T14:19:26+00:00

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 Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250217085657.789309-6-apatel@ventanamicro.com