From nobody Wed Dec 17 05:38:23 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1525974652349574.0282662306132; Thu, 10 May 2018 10:50:52 -0700 (PDT) Received: from localhost ([::1]:34994 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fGpiN-0002o1-Hl for importer@patchew.org; Thu, 10 May 2018 13:50:51 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48440) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fGpd9-0004zX-TY for qemu-devel@nongnu.org; Thu, 10 May 2018 13:45:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fGpd7-0000oy-Eo for qemu-devel@nongnu.org; Thu, 10 May 2018 13:45:27 -0400 Received: from orth.archaic.org.uk ([2001:8b0:1d0::2]:41592) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fGpd6-0000lQ-Ej for qemu-devel@nongnu.org; Thu, 10 May 2018 13:45:24 -0400 Received: from pm215 by orth.archaic.org.uk with local (Exim 4.89) (envelope-from ) id 1fGpd5-0003UP-6P for qemu-devel@nongnu.org; Thu, 10 May 2018 18:45:23 +0100 From: Peter Maydell To: qemu-devel@nongnu.org Date: Thu, 10 May 2018 18:45:02 +0100 Message-Id: <20180510174519.11264-5-peter.maydell@linaro.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180510174519.11264-1-peter.maydell@linaro.org> References: <20180510174519.11264-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2001:8b0:1d0::2 Subject: [Qemu-devel] [PULL 04/21] platform-bus-device: use device plug callback instead of machine_done notifier X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 From: Igor Mammedov platform-bus were using machine_done notifier to get and map (assign irq/mmio resources) dynamically added sysbus devices after all '-device' options had been processed. That however creates non obvious dependencies on ordering of machine_done notifiers and requires carefull line juggling to keep it working. For example see comment above create_platform_bus() and 'straitforward' arm_load_kernel() had to converted to machine_done notifier and that lead to yet another machine_done notifier to keep it working arm_register_platform_bus_fdt_creator(). Instead of hiding resource assignment in platform-bus-device to magically initialize sysbus devices, use device plug callback and assign resources explicitly at board level at the moment each -device option is being processed. That adds a bunch of machine declaration boiler plate to e500plat board, similar to ARM/x86 but gets rid of hidden machine_done notifier and would allow to remove the dependent notifiers in ARM code simplifying it and making code flow easier to follow. Signed-off-by: Igor Mammedov Reviewed-by: Philippe Mathieu-Daud=C3=A9 Acked-by: David Gibson Message-id: 1525691524-32265-3-git-send-email-imammedo@redhat.com Signed-off-by: Peter Maydell --- hw/ppc/e500.h | 5 +++++ include/hw/arm/virt.h | 1 + include/hw/platform-bus.h | 4 ++-- hw/arm/sysbus-fdt.c | 3 --- hw/arm/virt.c | 31 +++++++++++++++++++++++++++++++ hw/core/platform-bus.c | 29 +++++------------------------ hw/ppc/e500.c | 38 +++++++++++++++++--------------------- hw/ppc/e500plat.c | 31 +++++++++++++++++++++++++++++++ 8 files changed, 92 insertions(+), 50 deletions(-) diff --git a/hw/ppc/e500.h b/hw/ppc/e500.h index 621403bd24..3fd9f825ca 100644 --- a/hw/ppc/e500.h +++ b/hw/ppc/e500.h @@ -2,11 +2,16 @@ #define PPCE500_H =20 #include "hw/boards.h" +#include "hw/platform-bus.h" =20 typedef struct PPCE500MachineState { /*< private >*/ MachineState parent_obj; =20 + /* points to instance of TYPE_PLATFORM_BUS_DEVICE if + * board supports dynamic sysbus devices + */ + PlatformBusDevice *pbus_dev; } PPCE500MachineState; =20 typedef struct PPCE500MachineClass { diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h index 886372cdbb..4ac7ef6a37 100644 --- a/include/hw/arm/virt.h +++ b/include/hw/arm/virt.h @@ -99,6 +99,7 @@ typedef struct { typedef struct { MachineState parent; Notifier machine_done; + DeviceState *platform_bus_dev; FWCfgState *fw_cfg; bool secure; bool highmem; diff --git a/include/hw/platform-bus.h b/include/hw/platform-bus.h index a00775cba6..19e20c57ce 100644 --- a/include/hw/platform-bus.h +++ b/include/hw/platform-bus.h @@ -37,8 +37,6 @@ typedef struct PlatformBusDevice PlatformBusDevice; struct PlatformBusDevice { /*< private >*/ SysBusDevice parent_obj; - Notifier notifier; - bool done_gathering; =20 /*< public >*/ uint32_t mmio_size; @@ -54,4 +52,6 @@ int platform_bus_get_irqn(PlatformBusDevice *platform_bus= , SysBusDevice *sbdev, hwaddr platform_bus_get_mmio_addr(PlatformBusDevice *pbus, SysBusDevice *s= bdev, int n); =20 +void platform_bus_link_device(PlatformBusDevice *pbus, SysBusDevice *sbdev= ); + #endif /* HW_PLATFORM_BUS_H */ diff --git a/hw/arm/sysbus-fdt.c b/hw/arm/sysbus-fdt.c index d68e3dcdbd..80ff70e1ed 100644 --- a/hw/arm/sysbus-fdt.c +++ b/hw/arm/sysbus-fdt.c @@ -506,9 +506,6 @@ static void add_all_platform_bus_fdt_nodes(ARMPlatformB= usFDTParams *fdt_params) dev =3D qdev_find_recursive(sysbus_get_default(), TYPE_PLATFORM_BUS_DE= VICE); pbus =3D PLATFORM_BUS_DEVICE(dev); =20 - /* We can only create dt nodes for dynamic devices when they're ready = */ - assert(pbus->done_gathering); - PlatformBusFDTData data =3D { .fdt =3D fdt, .irq_start =3D irq_start, diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 11b9f599ca..1f54223f19 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -1150,6 +1150,7 @@ static void create_platform_bus(VirtMachineState *vms= , qemu_irq *pic) qdev_prop_set_uint32(dev, "mmio_size", platform_bus_params.platform_bus_size); qdev_init_nofail(dev); + vms->platform_bus_dev =3D dev; s =3D SYS_BUS_DEVICE(dev); =20 for (i =3D 0; i < platform_bus_params.platform_bus_num_irqs; i++) { @@ -1627,9 +1628,33 @@ static const CPUArchIdList *virt_possible_cpu_arch_i= ds(MachineState *ms) return ms->possible_cpus; } =20 +static void virt_machine_device_plug_cb(HotplugHandler *hotplug_dev, + DeviceState *dev, Error **errp) +{ + VirtMachineState *vms =3D VIRT_MACHINE(hotplug_dev); + + if (vms->platform_bus_dev) { + if (object_dynamic_cast(OBJECT(dev), TYPE_SYS_BUS_DEVICE)) { + platform_bus_link_device(PLATFORM_BUS_DEVICE(vms->platform_bus= _dev), + SYS_BUS_DEVICE(dev)); + } + } +} + +static HotplugHandler *virt_machine_get_hotplug_handler(MachineState *mach= ine, + DeviceState *dev) +{ + if (object_dynamic_cast(OBJECT(dev), TYPE_SYS_BUS_DEVICE)) { + return HOTPLUG_HANDLER(machine); + } + + return NULL; +} + static void virt_machine_class_init(ObjectClass *oc, void *data) { MachineClass *mc =3D MACHINE_CLASS(oc); + HotplugHandlerClass *hc =3D HOTPLUG_HANDLER_CLASS(oc); =20 mc->init =3D machvirt_init; /* Start max_cpus at the maximum QEMU supports. We'll further restrict @@ -1648,6 +1673,8 @@ static void virt_machine_class_init(ObjectClass *oc, = void *data) mc->cpu_index_to_instance_props =3D virt_cpu_index_to_props; mc->default_cpu_type =3D ARM_CPU_TYPE_NAME("cortex-a15"); mc->get_default_cpu_node_id =3D virt_get_default_cpu_node_id; + mc->get_hotplug_handler =3D virt_machine_get_hotplug_handler; + hc->plug =3D virt_machine_device_plug_cb; } =20 static const TypeInfo virt_machine_info =3D { @@ -1657,6 +1684,10 @@ static const TypeInfo virt_machine_info =3D { .instance_size =3D sizeof(VirtMachineState), .class_size =3D sizeof(VirtMachineClass), .class_init =3D virt_machine_class_init, + .interfaces =3D (InterfaceInfo[]) { + { TYPE_HOTPLUG_HANDLER }, + { } + }, }; =20 static void machvirt_machine_init(void) diff --git a/hw/core/platform-bus.c b/hw/core/platform-bus.c index 33d32fbf22..807cb5ccda 100644 --- a/hw/core/platform-bus.c +++ b/hw/core/platform-bus.c @@ -103,7 +103,6 @@ static void plaform_bus_refresh_irqs(PlatformBusDevice = *pbus) { bitmap_zero(pbus->used_irqs, pbus->num_irqs); foreach_dynamic_sysbus_device(platform_bus_count_irqs, pbus); - pbus->done_gathering =3D true; } =20 static void platform_bus_map_irq(PlatformBusDevice *pbus, SysBusDevice *sb= dev, @@ -163,12 +162,11 @@ static void platform_bus_map_mmio(PlatformBusDevice *= pbus, SysBusDevice *sbdev, } =20 /* - * For each sysbus device, look for unassigned IRQ lines as well as - * unassociated MMIO regions. Connect them to the platform bus if availabl= e. + * Look for unassigned IRQ lines as well as unassociated MMIO regions. + * Connect them to the platform bus if available. */ -static void link_sysbus_device(SysBusDevice *sbdev, void *opaque) +void platform_bus_link_device(PlatformBusDevice *pbus, SysBusDevice *sbdev) { - PlatformBusDevice *pbus =3D opaque; int i; =20 for (i =3D 0; sysbus_has_irq(sbdev, i); i++) { @@ -180,19 +178,6 @@ static void link_sysbus_device(SysBusDevice *sbdev, vo= id *opaque) } } =20 -static void platform_bus_init_notify(Notifier *notifier, void *data) -{ - PlatformBusDevice *pb =3D container_of(notifier, PlatformBusDevice, no= tifier); - - /* - * Generate a bitmap of used IRQ lines, as the user might have specifi= ed - * them on the command line. - */ - plaform_bus_refresh_irqs(pb); - - foreach_dynamic_sysbus_device(link_sysbus_device, pb); -} - static void platform_bus_realize(DeviceState *dev, Error **errp) { PlatformBusDevice *pbus; @@ -211,12 +196,8 @@ static void platform_bus_realize(DeviceState *dev, Err= or **errp) sysbus_init_irq(d, &pbus->irqs[i]); } =20 - /* - * Register notifier that allows us to gather dangling devices once the - * machine is completely assembled - */ - pbus->notifier.notify =3D platform_bus_init_notify; - qemu_add_machine_init_done_notifier(&pbus->notifier); + /* some devices might be initialized before so update used IRQs map */ + plaform_bus_refresh_irqs(pbus); } =20 static Property platform_bus_properties[] =3D { diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c index 748a8d213b..826053edc8 100644 --- a/hw/ppc/e500.c +++ b/hw/ppc/e500.c @@ -222,16 +222,15 @@ static void sysbus_device_create_devtree(SysBusDevice= *sbdev, void *opaque) } } =20 -static void platform_bus_create_devtree(const PPCE500MachineClass *pmc, +static void platform_bus_create_devtree(PPCE500MachineState *pms, void *fdt, const char *mpic) { + const PPCE500MachineClass *pmc =3D PPCE500_MACHINE_GET_CLASS(pms); gchar *node =3D g_strdup_printf("/platform@%"PRIx64, pmc->platform_bus= _base); const char platcomp[] =3D "qemu,platform\0simple-bus"; uint64_t addr =3D pmc->platform_bus_base; uint64_t size =3D pmc->platform_bus_size; int irq_start =3D pmc->platform_bus_first_irq; - PlatformBusDevice *pbus; - DeviceState *dev; =20 /* Create a /platform node that we can put all devices into */ =20 @@ -246,22 +245,17 @@ static void platform_bus_create_devtree(const PPCE500= MachineClass *pmc, =20 qemu_fdt_setprop_phandle(fdt, node, "interrupt-parent", mpic); =20 - dev =3D qdev_find_recursive(sysbus_get_default(), TYPE_PLATFORM_BUS_DE= VICE); - pbus =3D PLATFORM_BUS_DEVICE(dev); + /* Create dt nodes for dynamic devices */ + PlatformDevtreeData data =3D { + .fdt =3D fdt, + .mpic =3D mpic, + .irq_start =3D irq_start, + .node =3D node, + .pbus =3D pms->pbus_dev, + }; =20 - /* We can only create dt nodes for dynamic devices when they're ready = */ - if (pbus->done_gathering) { - PlatformDevtreeData data =3D { - .fdt =3D fdt, - .mpic =3D mpic, - .irq_start =3D irq_start, - .node =3D node, - .pbus =3D pbus, - }; - - /* Loop through all dynamic sysbus devices and create nodes for th= em */ - foreach_dynamic_sysbus_device(sysbus_device_create_devtree, &data); - } + /* Loop through all dynamic sysbus devices and create nodes for them */ + foreach_dynamic_sysbus_device(sysbus_device_create_devtree, &data); =20 g_free(node); } @@ -533,8 +527,8 @@ static int ppce500_load_device_tree(PPCE500MachineState= *pms, } g_free(soc); =20 - if (pmc->has_platform_bus) { - platform_bus_create_devtree(pmc, fdt, mpic); + if (pms->pbus_dev) { + platform_bus_create_devtree(pms, fdt, mpic); } g_free(mpic); =20 @@ -953,8 +947,9 @@ void ppce500_init(MachineState *machine) qdev_prop_set_uint32(dev, "num_irqs", pmc->platform_bus_num_irqs); qdev_prop_set_uint32(dev, "mmio_size", pmc->platform_bus_size); qdev_init_nofail(dev); - s =3D SYS_BUS_DEVICE(dev); + pms->pbus_dev =3D PLATFORM_BUS_DEVICE(dev); =20 + s =3D SYS_BUS_DEVICE(pms->pbus_dev); for (i =3D 0; i < pmc->platform_bus_num_irqs; i++) { int irqn =3D pmc->platform_bus_first_irq + i; sysbus_connect_irq(s, i, qdev_get_gpio_in(mpicdev, irqn)); @@ -1097,6 +1092,7 @@ static const TypeInfo ppce500_info =3D { .name =3D TYPE_PPCE500_MACHINE, .parent =3D TYPE_MACHINE, .abstract =3D true, + .instance_size =3D sizeof(PPCE500MachineState), .class_size =3D sizeof(PPCE500MachineClass), }; =20 diff --git a/hw/ppc/e500plat.c b/hw/ppc/e500plat.c index f69aadb666..1a469ba69f 100644 --- a/hw/ppc/e500plat.c +++ b/hw/ppc/e500plat.c @@ -43,13 +43,40 @@ static void e500plat_init(MachineState *machine) ppce500_init(machine); } =20 +static void e500plat_machine_device_plug_cb(HotplugHandler *hotplug_dev, + DeviceState *dev, Error **errp) +{ + PPCE500MachineState *pms =3D PPCE500_MACHINE(hotplug_dev); + + if (pms->pbus_dev) { + if (object_dynamic_cast(OBJECT(dev), TYPE_SYS_BUS_DEVICE)) { + platform_bus_link_device(pms->pbus_dev, SYS_BUS_DEVICE(dev)); + } + } +} + +static +HotplugHandler *e500plat_machine_get_hotpug_handler(MachineState *machine, + DeviceState *dev) +{ + if (object_dynamic_cast(OBJECT(dev), TYPE_SYS_BUS_DEVICE)) { + return HOTPLUG_HANDLER(machine); + } + + return NULL; +} + #define TYPE_E500PLAT_MACHINE MACHINE_TYPE_NAME("ppce500") =20 static void e500plat_machine_class_init(ObjectClass *oc, void *data) { PPCE500MachineClass *pmc =3D PPCE500_MACHINE_CLASS(oc); + HotplugHandlerClass *hc =3D HOTPLUG_HANDLER_CLASS(oc); MachineClass *mc =3D MACHINE_CLASS(oc); =20 + mc->get_hotplug_handler =3D e500plat_machine_get_hotpug_handler; + hc->plug =3D e500plat_machine_device_plug_cb; + pmc->pci_first_slot =3D 0x1; pmc->pci_nr_slots =3D PCI_SLOT_MAX - 1; pmc->fixup_devtree =3D e500plat_fixup_devtree; @@ -77,6 +104,10 @@ static const TypeInfo e500plat_info =3D { .name =3D TYPE_E500PLAT_MACHINE, .parent =3D TYPE_PPCE500_MACHINE, .class_init =3D e500plat_machine_class_init, + .interfaces =3D (InterfaceInfo[]) { + { TYPE_HOTPLUG_HANDLER }, + { } + } }; =20 static void e500plat_register_types(void) --=20 2.17.0