2009-05-14 23:35:06 +02:00
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/*
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* System (CPU) Bus device support code
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*
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* Copyright (c) 2009 CodeSourcery
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2009-07-16 22:47:01 +02:00
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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2009-05-14 23:35:06 +02:00
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*/
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2016-01-26 19:17:29 +01:00
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#include "qemu/osdep.h"
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2018-05-28 16:45:08 +02:00
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#include "qapi/error.h"
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2013-02-04 15:40:22 +01:00
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#include "hw/sysbus.h"
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2012-12-17 18:19:49 +01:00
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#include "monitor/monitor.h"
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2012-12-17 18:19:49 +01:00
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#include "exec/address-spaces.h"
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2009-05-14 23:35:06 +02:00
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2009-06-30 14:12:08 +02:00
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static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
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2010-12-08 12:35:00 +01:00
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static char *sysbus_get_fw_dev_path(DeviceState *dev);
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2009-06-30 14:12:08 +02:00
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2014-09-24 13:06:57 +02:00
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typedef struct SysBusFind {
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void *opaque;
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FindSysbusDeviceFunc *func;
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} SysBusFind;
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/* Run func() for every sysbus device, traverse the tree for everything else */
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static int find_sysbus_device(Object *obj, void *opaque)
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{
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SysBusFind *find = opaque;
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Object *dev;
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SysBusDevice *sbdev;
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dev = object_dynamic_cast(obj, TYPE_SYS_BUS_DEVICE);
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sbdev = (SysBusDevice *)dev;
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if (!sbdev) {
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/* Container, traverse it for children */
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return object_child_foreach(obj, find_sysbus_device, opaque);
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}
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find->func(sbdev, find->opaque);
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return 0;
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}
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/*
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* Loop through all dynamically created sysbus devices and call
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* func() for each instance.
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*/
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void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque)
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{
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Object *container;
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SysBusFind find = {
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.func = func,
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.opaque = opaque,
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};
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/* Loop through all sysbus devices that were spawened outside the machine */
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container = container_get(qdev_get_machine(), "/peripheral");
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find_sysbus_device(container, &find);
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container = container_get(qdev_get_machine(), "/peripheral-anon");
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find_sysbus_device(container, &find);
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}
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2012-05-02 09:00:20 +02:00
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static void system_bus_class_init(ObjectClass *klass, void *data)
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{
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BusClass *k = BUS_CLASS(klass);
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k->print_dev = sysbus_dev_print;
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k->get_fw_dev_path = sysbus_get_fw_dev_path;
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}
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static const TypeInfo system_bus_info = {
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.name = TYPE_SYSTEM_BUS,
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.parent = TYPE_BUS,
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.instance_size = sizeof(BusState),
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.class_init = system_bus_class_init,
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2009-06-30 14:12:08 +02:00
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};
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2014-09-24 12:32:17 +02:00
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/* Check whether an IRQ source exists */
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bool sysbus_has_irq(SysBusDevice *dev, int n)
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{
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char *prop = g_strdup_printf("%s[%d]", SYSBUS_DEVICE_GPIO_IRQ, n);
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ObjectProperty *r;
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r = object_property_find(OBJECT(dev), prop, NULL);
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2015-02-27 08:50:18 +01:00
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g_free(prop);
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2014-09-24 12:32:17 +02:00
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return (r != NULL);
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}
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bool sysbus_is_irq_connected(SysBusDevice *dev, int n)
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{
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return !!sysbus_get_connected_irq(dev, n);
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}
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qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n)
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{
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DeviceState *d = DEVICE(dev);
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return qdev_get_gpio_out_connector(d, SYSBUS_DEVICE_GPIO_IRQ, n);
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}
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2009-05-14 23:35:06 +02:00
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void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
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{
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2015-07-06 20:15:14 +02:00
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SysBusDeviceClass *sbd = SYS_BUS_DEVICE_GET_CLASS(dev);
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2014-09-26 07:24:15 +02:00
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qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq);
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2015-07-06 20:15:14 +02:00
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if (sbd->connect_irq_notifier) {
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sbd->connect_irq_notifier(dev, irq);
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}
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2009-05-14 23:35:06 +02:00
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}
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2014-09-24 12:36:30 +02:00
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/* Check whether an MMIO region exists */
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bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n)
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{
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return (n < dev->num_mmio);
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}
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2013-02-22 04:58:44 +01:00
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static void sysbus_mmio_map_common(SysBusDevice *dev, int n, hwaddr addr,
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2013-09-16 10:21:14 +02:00
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bool may_overlap, int priority)
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2009-05-14 23:35:06 +02:00
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{
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assert(n >= 0 && n < dev->num_mmio);
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if (dev->mmio[n].addr == addr) {
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/* ??? region already mapped here. */
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return;
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}
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2012-10-23 12:30:10 +02:00
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if (dev->mmio[n].addr != (hwaddr)-1) {
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2009-05-14 23:35:06 +02:00
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/* Unregister previous mapping. */
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2011-12-19 21:33:59 +01:00
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memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
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2009-05-14 23:35:06 +02:00
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}
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dev->mmio[n].addr = addr;
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2013-02-22 04:58:44 +01:00
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if (may_overlap) {
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memory_region_add_subregion_overlap(get_system_memory(),
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addr,
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dev->mmio[n].memory,
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priority);
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}
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else {
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memory_region_add_subregion(get_system_memory(),
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addr,
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dev->mmio[n].memory);
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}
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2009-05-14 23:35:06 +02:00
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}
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2013-02-22 04:58:44 +01:00
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void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr)
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{
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sysbus_mmio_map_common(dev, n, addr, false, 0);
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}
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void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
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2013-09-16 10:21:14 +02:00
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int priority)
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2013-02-22 04:58:44 +01:00
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{
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sysbus_mmio_map_common(dev, n, addr, true, priority);
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}
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2009-05-14 23:35:06 +02:00
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/* Request an IRQ source. The actual IRQ object may be populated later. */
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void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
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{
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2014-09-26 07:24:15 +02:00
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qdev_init_gpio_out_named(DEVICE(dev), p, SYSBUS_DEVICE_GPIO_IRQ, 1);
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2009-05-14 23:35:06 +02:00
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}
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/* Pass IRQs from a target device. */
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void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
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{
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2014-09-26 07:24:15 +02:00
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qdev_pass_gpios(DEVICE(target), DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ);
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2009-05-14 23:35:06 +02:00
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}
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2011-11-27 10:38:10 +01:00
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void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
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2011-07-26 13:26:21 +02:00
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{
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int n;
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assert(dev->num_mmio < QDEV_MAX_MMIO);
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n = dev->num_mmio++;
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dev->mmio[n].addr = -1;
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dev->mmio[n].memory = memory;
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}
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2011-08-28 18:22:17 +02:00
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MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
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{
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return dev->mmio[n].memory;
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}
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2016-03-16 10:20:34 +01:00
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void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size)
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2010-12-08 12:35:00 +01:00
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{
|
2016-03-16 10:20:34 +01:00
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uint32_t i;
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2010-12-08 12:35:00 +01:00
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for (i = 0; i < size; i++) {
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assert(dev->num_pio < QDEV_MAX_PIO);
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dev->pio[dev->num_pio++] = ioport++;
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}
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}
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2018-12-13 14:48:03 +01:00
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/* The purpose of preserving this empty realize function
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* is to prevent the parent_realize field of some subclasses
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* from being set to NULL to break the normal init/realize
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* of some devices.
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*/
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2018-05-28 16:45:08 +02:00
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static void sysbus_realize(DeviceState *dev, Error **errp)
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2009-05-14 23:35:06 +02:00
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{
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}
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DeviceState *sysbus_create_varargs(const char *name,
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2012-10-23 12:30:10 +02:00
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hwaddr addr, ...)
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2009-05-14 23:35:06 +02:00
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{
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DeviceState *dev;
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SysBusDevice *s;
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va_list va;
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qemu_irq irq;
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int n;
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dev = qdev_create(NULL, name);
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2013-01-20 02:47:33 +01:00
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s = SYS_BUS_DEVICE(dev);
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2009-10-07 01:15:58 +02:00
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qdev_init_nofail(dev);
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2012-10-23 12:30:10 +02:00
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if (addr != (hwaddr)-1) {
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2009-05-14 23:35:06 +02:00
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sysbus_mmio_map(s, 0, addr);
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}
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va_start(va, addr);
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n = 0;
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while (1) {
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2011-02-05 15:34:56 +01:00
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irq = va_arg(va, qemu_irq);
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if (!irq) {
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break;
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}
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sysbus_connect_irq(s, n, irq);
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n++;
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}
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2011-10-28 10:52:25 +02:00
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va_end(va);
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2011-02-05 15:34:56 +01:00
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return dev;
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}
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DeviceState *sysbus_try_create_varargs(const char *name,
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2012-10-23 12:30:10 +02:00
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hwaddr addr, ...)
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2011-02-05 15:34:56 +01:00
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{
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DeviceState *dev;
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SysBusDevice *s;
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va_list va;
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qemu_irq irq;
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int n;
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dev = qdev_try_create(NULL, name);
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if (!dev) {
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return NULL;
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}
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2013-01-20 02:47:33 +01:00
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s = SYS_BUS_DEVICE(dev);
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2011-02-05 15:34:56 +01:00
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qdev_init_nofail(dev);
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2012-10-23 12:30:10 +02:00
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if (addr != (hwaddr)-1) {
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2011-02-05 15:34:56 +01:00
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sysbus_mmio_map(s, 0, addr);
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}
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va_start(va, addr);
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n = 0;
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while (1) {
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2009-05-14 23:35:06 +02:00
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irq = va_arg(va, qemu_irq);
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if (!irq) {
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break;
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}
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sysbus_connect_irq(s, n, irq);
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n++;
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}
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2011-10-28 10:52:25 +02:00
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va_end(va);
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2009-05-14 23:35:06 +02:00
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return dev;
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}
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2009-06-05 16:53:17 +02:00
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2009-06-30 14:12:08 +02:00
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static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
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2009-06-05 16:53:17 +02:00
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{
|
2013-01-20 02:47:33 +01:00
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SysBusDevice *s = SYS_BUS_DEVICE(dev);
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2012-10-23 12:30:10 +02:00
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hwaddr size;
|
2009-06-05 16:53:17 +02:00
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int i;
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for (i = 0; i < s->num_mmio; i++) {
|
2011-12-19 21:33:59 +01:00
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size = memory_region_size(s->mmio[i].memory);
|
2009-06-05 16:53:17 +02:00
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monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
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2011-11-27 10:32:34 +01:00
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indent, "", s->mmio[i].addr, size);
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2009-06-05 16:53:17 +02:00
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}
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}
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2010-12-08 12:35:00 +01:00
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static char *sysbus_get_fw_dev_path(DeviceState *dev)
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{
|
2013-01-20 02:47:33 +01:00
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SysBusDevice *s = SYS_BUS_DEVICE(dev);
|
2015-06-19 04:40:16 +02:00
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SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(s);
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char *addr, *fw_dev_path;
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2010-12-08 12:35:00 +01:00
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2015-06-19 04:40:16 +02:00
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if (sbc->explicit_ofw_unit_address) {
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addr = sbc->explicit_ofw_unit_address(s);
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if (addr) {
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fw_dev_path = g_strdup_printf("%s@%s", qdev_fw_name(dev), addr);
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g_free(addr);
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return fw_dev_path;
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}
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}
|
2018-08-05 13:28:49 +02:00
|
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if (s->num_mmio) {
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return g_strdup_printf("%s@" TARGET_FMT_plx, qdev_fw_name(dev),
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s->mmio[0].addr);
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}
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if (s->num_pio) {
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return g_strdup_printf("%s@i%04x", qdev_fw_name(dev), s->pio[0]);
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}
|
2015-06-17 14:45:03 +02:00
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return g_strdup(qdev_fw_name(dev));
|
2010-12-08 12:35:00 +01:00
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}
|
2011-07-24 16:12:11 +02:00
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2012-10-23 12:30:10 +02:00
|
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void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
|
2011-07-24 16:12:11 +02:00
|
|
|
MemoryRegion *mem)
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|
|
|
{
|
|
|
|
memory_region_add_subregion(get_system_io(), addr, mem);
|
|
|
|
}
|
|
|
|
|
2011-12-08 14:57:34 +01:00
|
|
|
MemoryRegion *sysbus_address_space(SysBusDevice *dev)
|
|
|
|
{
|
|
|
|
return get_system_memory();
|
|
|
|
}
|
2012-01-24 20:12:29 +01:00
|
|
|
|
2011-12-08 04:34:16 +01:00
|
|
|
static void sysbus_device_class_init(ObjectClass *klass, void *data)
|
|
|
|
{
|
|
|
|
DeviceClass *k = DEVICE_CLASS(klass);
|
2018-05-28 16:45:08 +02:00
|
|
|
k->realize = sysbus_realize;
|
2012-05-02 09:00:20 +02:00
|
|
|
k->bus_type = TYPE_SYSTEM_BUS;
|
sysbus: Set user_creatable=false by default on TYPE_SYS_BUS_DEVICE
commit 33cd52b5d7b9adfd009e95f07e6c64dd88ae2a31 unset
cannot_instantiate_with_device_add_yet in TYPE_SYSBUS, making all
sysbus devices appear on "-device help" and lack the "no-user"
flag in "info qdm".
To fix this, we can set user_creatable=false by default on
TYPE_SYS_BUS_DEVICE, but this requires setting
user_creatable=true explicitly on the sysbus devices that
actually work with -device.
Fortunately today we have just a few has_dynamic_sysbus=1
machines: virt, pc-q35-*, ppce500, and spapr.
virt, ppce500, and spapr have extra checks to ensure just a few
device types can be instantiated:
* virt supports only TYPE_VFIO_CALXEDA_XGMAC, TYPE_VFIO_AMD_XGBE.
* ppce500 supports only TYPE_ETSEC_COMMON.
* spapr supports only TYPE_SPAPR_PCI_HOST_BRIDGE.
This patch sets user_creatable=true explicitly on those 4 device
classes.
Now, the more complex cases:
pc-q35-*: q35 has no sysbus device whitelist yet (which is a
separate bug). We are in the process of fixing it and building a
sysbus whitelist on q35, but in the meantime we can fix the
"-device help" and "info qdm" bugs mentioned above. Also, despite
not being strictly necessary for fixing the q35 bug, reducing the
list of user_creatable=true devices will help us be more
confident when building the q35 whitelist.
xen: We also have a hack at xen_set_dynamic_sysbus(), that sets
has_dynamic_sysbus=true at runtime when using the Xen
accelerator. This hack is only used to allow xen-backend devices
to be dynamically plugged/unplugged.
This means today we can use -device with the following 22 device
types, that are the ones compiled into the qemu-system-x86_64 and
qemu-system-i386 binaries:
* allwinner-ahci
* amd-iommu
* cfi.pflash01
* esp
* fw_cfg_io
* fw_cfg_mem
* generic-sdhci
* hpet
* intel-iommu
* ioapic
* isabus-bridge
* kvmclock
* kvm-ioapic
* kvmvapic
* SUNW,fdtwo
* sysbus-ahci
* sysbus-fdc
* sysbus-ohci
* unimplemented-device
* virtio-mmio
* xen-backend
* xen-sysdev
This patch adds user_creatable=true explicitly to those devices,
temporarily, just to keep 100% compatibility with existing
behavior of q35. Subsequent patches will remove
user_creatable=true from the devices that are really not meant to
user-creatable on any machine, and remove the FIXME comment from
the ones that are really supposed to be user-creatable. This is
being done in separate patches because we still don't have an
obvious list of devices that will be whitelisted by q35, and I
would like to get each device reviewed individually.
Cc: Alexander Graf <agraf@suse.de>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Beniamino Galvani <b.galvani@gmail.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Frank Blaschka <frank.blaschka@de.ibm.com>
Cc: Gabriel L. Somlo <somlo@cmu.edu>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: John Snow <jsnow@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Pierre Morel <pmorel@linux.vnet.ibm.com>
Cc: Prasad J Pandit <pjp@fedoraproject.org>
Cc: qemu-arm@nongnu.org
Cc: qemu-block@nongnu.org
Cc: qemu-ppc@nongnu.org
Cc: Richard Henderson <rth@twiddle.net>
Cc: Rob Herring <robh@kernel.org>
Cc: Shannon Zhao <zhaoshenglong@huawei.com>
Cc: sstabellini@kernel.org
Cc: Thomas Huth <thuth@redhat.com>
Cc: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Acked-by: John Snow <jsnow@redhat.com>
Acked-by: Juergen Gross <jgross@suse.com>
Acked-by: Marcel Apfelbaum <marcel@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20170503203604.31462-3-ehabkost@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[ehabkost: Small changes at sysbus_device_class_init() comments]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-05-03 22:35:45 +02:00
|
|
|
/*
|
|
|
|
* device_add plugs devices into a suitable bus. For "real" buses,
|
|
|
|
* that actually connects the device. For sysbus, the connections
|
|
|
|
* need to be made separately, and device_add can't do that. The
|
|
|
|
* device would be left unconnected, and will probably not work
|
|
|
|
*
|
|
|
|
* However, a few machines can handle device_add/-device with
|
|
|
|
* a few specific sysbus devices. In those cases, the device
|
|
|
|
* subclass needs to override it and set user_creatable=true.
|
|
|
|
*/
|
|
|
|
k->user_creatable = false;
|
2011-12-08 04:34:16 +01:00
|
|
|
}
|
|
|
|
|
2013-01-10 16:19:07 +01:00
|
|
|
static const TypeInfo sysbus_device_type_info = {
|
2012-01-24 20:12:29 +01:00
|
|
|
.name = TYPE_SYS_BUS_DEVICE,
|
|
|
|
.parent = TYPE_DEVICE,
|
|
|
|
.instance_size = sizeof(SysBusDevice),
|
|
|
|
.abstract = true,
|
|
|
|
.class_size = sizeof(SysBusDeviceClass),
|
2011-12-08 04:34:16 +01:00
|
|
|
.class_init = sysbus_device_class_init,
|
2012-01-24 20:12:29 +01:00
|
|
|
};
|
|
|
|
|
2012-05-02 12:06:55 +02:00
|
|
|
/* This is a nasty hack to allow passing a NULL bus to qdev_create. */
|
|
|
|
static BusState *main_system_bus;
|
|
|
|
|
|
|
|
static void main_system_bus_create(void)
|
|
|
|
{
|
|
|
|
/* assign main_system_bus before qbus_create_inplace()
|
|
|
|
* in order to make "if (bus != sysbus_get_default())" work */
|
2012-05-02 09:00:20 +02:00
|
|
|
main_system_bus = g_malloc0(system_bus_info.instance_size);
|
2013-08-24 00:02:27 +02:00
|
|
|
qbus_create_inplace(main_system_bus, system_bus_info.instance_size,
|
|
|
|
TYPE_SYSTEM_BUS, NULL, "main-system-bus");
|
2012-11-23 09:47:15 +01:00
|
|
|
OBJECT(main_system_bus)->free = g_free;
|
2012-05-02 10:39:01 +02:00
|
|
|
object_property_add_child(container_get(qdev_get_machine(),
|
|
|
|
"/unattached"),
|
|
|
|
"sysbus", OBJECT(main_system_bus), NULL);
|
2012-05-02 12:06:55 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
BusState *sysbus_get_default(void)
|
|
|
|
{
|
|
|
|
if (!main_system_bus) {
|
|
|
|
main_system_bus_create();
|
|
|
|
}
|
|
|
|
return main_system_bus;
|
|
|
|
}
|
|
|
|
|
2018-07-16 14:59:19 +02:00
|
|
|
void sysbus_init_child_obj(Object *parent, const char *childname, void *child,
|
|
|
|
size_t childsize, const char *childtype)
|
|
|
|
{
|
|
|
|
object_initialize_child(parent, childname, child, childsize, childtype,
|
|
|
|
&error_abort, NULL);
|
|
|
|
qdev_set_parent_bus(DEVICE(child), sysbus_get_default());
|
|
|
|
}
|
|
|
|
|
2012-02-09 15:20:55 +01:00
|
|
|
static void sysbus_register_types(void)
|
2012-01-24 20:12:29 +01:00
|
|
|
{
|
2012-05-02 09:00:20 +02:00
|
|
|
type_register_static(&system_bus_info);
|
2012-01-24 20:12:29 +01:00
|
|
|
type_register_static(&sysbus_device_type_info);
|
|
|
|
}
|
|
|
|
|
2012-02-09 15:20:55 +01:00
|
|
|
type_init(sysbus_register_types)
|