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* hw/irq: New qemu_init_irq_child() functionPeter Maydell2025-09-021-1/+22
| | | | | | | | | | | | | | | | | | | | The qemu_init_irq() function initializes a TYPE_IRQ QOM object. The caller is therefore responsible for eventually calling qemu_free_irq() to unref (and thus free) it. In many places where we want to initialize an IRQ we are in the init/realize of some other QOM object; if we have a variant of this function that calls object_initialize_child() then the IRQ will be automatically cleaned up when its parent object is destroyed, and we don't need to remember to manually free it. Implement qemu_init_irq_child(), which is to qemu_init_irq() what object_initialize_child() is to object_initialize(). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20250821154053.2417090-2-peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
* hw/irq: Introduce qemu_init_irqs() helperPhilippe Mathieu-Daudé2025-01-311-0/+11
| | | | | | | | | | While qemu_init_irq() initialize a single IRQ, qemu_init_irqs() initialize an array of them. Suggested-by: Bernhard Beschow <shentey@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250121155526.29982-2-philmd@linaro.org>
* hw: Move declaration of IRQState to header and add init functionBALATON Zoltan2024-09-111-0/+18
| | | | | | | | | To allow embedding a qemu_irq in a struct move its definition to the header and add a function to init it in place without allocating it. Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Message-Id: <e3ffd0f6ef8845d0f7247c9b6ff33f7ee8b432cf.1719690591.git.balaton@eik.bme.hu> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
* hw/core/irq: remove unused 'qemu_irq_split' functionZongyuan Li2022-04-211-5/+0
| | | | | | | | Signed-off-by: Zongyuan Li <zongyuan.li@smartx.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20220324181557.203805-5-zongyuan.li@smartx.com Resolves: https://gitlab.com/qemu-project/qemu/-/issues/811 Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* include/hw/irq.h: New function qemu_irq_is_connected()Peter Maydell2020-08-031-0/+18
| | | | | | | | | | | | | | | | | | Mostly devices don't need to care whether one of their output qemu_irq lines is connected, because functions like qemu_set_irq() silently do nothing if there is nothing on the other end. However sometimes a device might want to implement default behaviour for the case where the machine hasn't wired the line up to anywhere. Provide a function qemu_irq_is_connected() that devices can use for this purpose. (The test is trivial but encapsulating it in a function makes it easier to see where we're doing it in case we need to change the implementation later.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20200728103744.6909-2-peter.maydell@linaro.org
* Revert "irq: introduce qemu_irq_proxy()"Philippe Mathieu-Daudé2019-11-051-5/+0
| | | | | | | | | | | This function isn't used anymore. This reverts commit 22ec3283efba9ba0792790da786d6776d83f2a92. Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Esteban Bosse <estebanbosse@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
* Include hw/irq.h a lot lessMarkus Armbruster2019-08-161-4/+0
| | | | | | | | | | | | | | | | | | | In my "build everything" tree, changing hw/irq.h triggers a recompile of some 5400 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). hw/hw.h supposedly includes it for convenience. Several other headers include it just to get qemu_irq and.or qemu_irq_handler. Move the qemu_irq and qemu_irq_handler typedefs from hw/irq.h to qemu/typedefs.h, and then include hw/irq.h only where it's still needed. Touching it now recompiles only some 500 objects. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20190812052359.30071-13-armbru@redhat.com>
* hw/core/split-irq: Device that splits IRQ linesPeter Maydell2018-03-021-1/+3
| | | | | | | | | | | | | | | | | In some board or SoC models it is necessary to split a qemu_irq line so that one input can feed multiple outputs. We currently have qemu_irq_split() for this, but that has several deficiencies: * it can only handle splitting a line into two * it unavoidably leaks memory, so it can't be used in a device that can be deleted Implement a qdev device that encapsulates splitting of IRQs, with a configurable number of outputs. (This is in some ways the inverse of the TYPE_OR_IRQ device.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20180220180325.29818-13-peter.maydell@linaro.org
* irq: Remove qemu_irq_intercept_outPeter Crosthwaite2014-10-231-1/+0
| | | | | | | | No more users left and obsoleted by qdev_intercept_gpio_out. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* irq: Slim conversion of qemu_irq to QOMAndreas Färber2014-07-011-0/+2
| | | | | | | | | | | | | | | | As a prequel to any big Pin refactoring plans, do an in-place conversion of qemu_irq to an Object, so that we can reference it in link<> properties. Signed-off-by: Andreas Färber <afaerber@suse.de> [ PC Changes: * Removed array-alloctor ref counting logic (limit changes just to * single IRQ allocator) * Removed WIP marking from subject line ] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
* irq: Allocate IRQs individuallyPeter Crosthwaite2014-07-011-1/+1
| | | | | | | | | | | | | | | | | | Allocate each IRQ individually on array allocations. This prepares for QOMification of IRQs, where pointers to individual IRQs may be taken and handed around for usage as QOM Links. The g_renew() scheme used here is too fragile and would break all existing links should an IRQ list be extended. We now have to pass the IRQ count to qemu_free_irqs(). We have so few call sites however, so this change is reasonably trivial. Cc: agarcia@igalia.com Cc: mst@redhat.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Alberto Garcia <agarcia@igalia.com> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
* hw/core: Add interface to allocate and free a single IRQMarcel Apfelbaum2013-10-141-0/+7
| | | | | | | | | | qemu_allocate_irq returns a single qemu_irq. The interface allows to specify an interrupt number. qemu_free_irq frees it. Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* hw: move headers to include/Paolo Bonzini2013-04-081-0/+57
Many of these should be cleaned up with proper qdev-/QOM-ification. Right now there are many catch-all headers in include/hw/ARCH depending on cpu.h, and this makes it necessary to compile these files per-target. However, fixing this does not belong in these patches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>