qemu-e2k/hw/core/sysbus.c

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/*
* System (CPU) Bus device support code
*
* Copyright (c) 2009 CodeSourcery
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "monitor/monitor.h"
#include "exec/address-spaces.h"
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
static char *sysbus_get_fw_dev_path(DeviceState *dev);
typedef struct SysBusFind {
void *opaque;
FindSysbusDeviceFunc *func;
} SysBusFind;
/* Run func() for every sysbus device, traverse the tree for everything else */
static int find_sysbus_device(Object *obj, void *opaque)
{
SysBusFind *find = opaque;
Object *dev;
SysBusDevice *sbdev;
dev = object_dynamic_cast(obj, TYPE_SYS_BUS_DEVICE);
sbdev = (SysBusDevice *)dev;
if (!sbdev) {
/* Container, traverse it for children */
return object_child_foreach(obj, find_sysbus_device, opaque);
}
find->func(sbdev, find->opaque);
return 0;
}
/*
* Loop through all dynamically created sysbus devices and call
* func() for each instance.
*/
void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque)
{
Object *container;
SysBusFind find = {
.func = func,
.opaque = opaque,
};
/* Loop through all sysbus devices that were spawened outside the machine */
container = container_get(qdev_get_machine(), "/peripheral");
find_sysbus_device(container, &find);
container = container_get(qdev_get_machine(), "/peripheral-anon");
find_sysbus_device(container, &find);
}
static void system_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *k = BUS_CLASS(klass);
k->print_dev = sysbus_dev_print;
k->get_fw_dev_path = sysbus_get_fw_dev_path;
}
static const TypeInfo system_bus_info = {
.name = TYPE_SYSTEM_BUS,
.parent = TYPE_BUS,
.instance_size = sizeof(BusState),
.class_init = system_bus_class_init,
};
/* Check whether an IRQ source exists */
bool sysbus_has_irq(SysBusDevice *dev, int n)
{
char *prop = g_strdup_printf("%s[%d]", SYSBUS_DEVICE_GPIO_IRQ, n);
ObjectProperty *r;
r = object_property_find(OBJECT(dev), prop, NULL);
g_free(prop);
return (r != NULL);
}
bool sysbus_is_irq_connected(SysBusDevice *dev, int n)
{
return !!sysbus_get_connected_irq(dev, n);
}
qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n)
{
DeviceState *d = DEVICE(dev);
return qdev_get_gpio_out_connector(d, SYSBUS_DEVICE_GPIO_IRQ, n);
}
void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
{
SysBusDeviceClass *sbd = SYS_BUS_DEVICE_GET_CLASS(dev);
qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq);
if (sbd->connect_irq_notifier) {
sbd->connect_irq_notifier(dev, irq);
}
}
/* Check whether an MMIO region exists */
bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n)
{
return (n < dev->num_mmio);
}
static void sysbus_mmio_map_common(SysBusDevice *dev, int n, hwaddr addr,
bool may_overlap, int priority)
{
assert(n >= 0 && n < dev->num_mmio);
if (dev->mmio[n].addr == addr) {
/* ??? region already mapped here. */
return;
}
if (dev->mmio[n].addr != (hwaddr)-1) {
/* Unregister previous mapping. */
memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
}
dev->mmio[n].addr = addr;
if (may_overlap) {
memory_region_add_subregion_overlap(get_system_memory(),
addr,
dev->mmio[n].memory,
priority);
}
else {
memory_region_add_subregion(get_system_memory(),
addr,
dev->mmio[n].memory);
}
}
void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr)
{
sysbus_mmio_map_common(dev, n, addr, false, 0);
}
void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
int priority)
{
sysbus_mmio_map_common(dev, n, addr, true, priority);
}
/* Request an IRQ source. The actual IRQ object may be populated later. */
void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
{
qdev_init_gpio_out_named(DEVICE(dev), p, SYSBUS_DEVICE_GPIO_IRQ, 1);
}
/* Pass IRQs from a target device. */
void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
{
qdev_pass_gpios(DEVICE(target), DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ);
}
void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
{
int n;
assert(dev->num_mmio < QDEV_MAX_MMIO);
n = dev->num_mmio++;
dev->mmio[n].addr = -1;
dev->mmio[n].memory = memory;
}
MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
{
return dev->mmio[n].memory;
}
void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size)
{
uint32_t i;
for (i = 0; i < size; i++) {
assert(dev->num_pio < QDEV_MAX_PIO);
dev->pio[dev->num_pio++] = ioport++;
}
}
/* TODO remove once all sysbus devices have been converted to realize */
static void sysbus_realize(DeviceState *dev, Error **errp)
{
SysBusDevice *sd = SYS_BUS_DEVICE(dev);
SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd);
if (!sbc->init) {
return;
}
if (sbc->init(sd) < 0) {
error_setg(errp, "Device initialization failed");
}
}
DeviceState *sysbus_create_varargs(const char *name,
hwaddr addr, ...)
{
DeviceState *dev;
SysBusDevice *s;
va_list va;
qemu_irq irq;
int n;
dev = qdev_create(NULL, name);
s = SYS_BUS_DEVICE(dev);
qdev_init_nofail(dev);
if (addr != (hwaddr)-1) {
sysbus_mmio_map(s, 0, addr);
}
va_start(va, addr);
n = 0;
while (1) {
irq = va_arg(va, qemu_irq);
if (!irq) {
break;
}
sysbus_connect_irq(s, n, irq);
n++;
}
va_end(va);
return dev;
}
DeviceState *sysbus_try_create_varargs(const char *name,
hwaddr addr, ...)
{
DeviceState *dev;
SysBusDevice *s;
va_list va;
qemu_irq irq;
int n;
dev = qdev_try_create(NULL, name);
if (!dev) {
return NULL;
}
s = SYS_BUS_DEVICE(dev);
qdev_init_nofail(dev);
if (addr != (hwaddr)-1) {
sysbus_mmio_map(s, 0, addr);
}
va_start(va, addr);
n = 0;
while (1) {
irq = va_arg(va, qemu_irq);
if (!irq) {
break;
}
sysbus_connect_irq(s, n, irq);
n++;
}
va_end(va);
return dev;
}
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
{
SysBusDevice *s = SYS_BUS_DEVICE(dev);
hwaddr size;
int i;
for (i = 0; i < s->num_mmio; i++) {
size = memory_region_size(s->mmio[i].memory);
monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
indent, "", s->mmio[i].addr, size);
}
}
static char *sysbus_get_fw_dev_path(DeviceState *dev)
{
SysBusDevice *s = SYS_BUS_DEVICE(dev);
SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(s);
/* for the explicit unit address fallback case: */
char *addr, *fw_dev_path;
if (s->num_mmio) {
return g_strdup_printf("%s@" TARGET_FMT_plx, qdev_fw_name(dev),
s->mmio[0].addr);
}
if (s->num_pio) {
return g_strdup_printf("%s@i%04x", qdev_fw_name(dev), s->pio[0]);
}
if (sbc->explicit_ofw_unit_address) {
addr = sbc->explicit_ofw_unit_address(s);
if (addr) {
fw_dev_path = g_strdup_printf("%s@%s", qdev_fw_name(dev), addr);
g_free(addr);
return fw_dev_path;
}
}
return g_strdup(qdev_fw_name(dev));
}
void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
MemoryRegion *mem)
{
memory_region_add_subregion(get_system_io(), addr, mem);
}
MemoryRegion *sysbus_address_space(SysBusDevice *dev)
{
return get_system_memory();
}
static void sysbus_device_class_init(ObjectClass *klass, void *data)
{
DeviceClass *k = DEVICE_CLASS(klass);
k->realize = sysbus_realize;
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;
}
static const TypeInfo sysbus_device_type_info = {
.name = TYPE_SYS_BUS_DEVICE,
.parent = TYPE_DEVICE,
.instance_size = sizeof(SysBusDevice),
.abstract = true,
.class_size = sizeof(SysBusDeviceClass),
.class_init = sysbus_device_class_init,
};
/* 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 */
main_system_bus = g_malloc0(system_bus_info.instance_size);
qbus_create_inplace(main_system_bus, system_bus_info.instance_size,
TYPE_SYSTEM_BUS, NULL, "main-system-bus");
OBJECT(main_system_bus)->free = g_free;
object_property_add_child(container_get(qdev_get_machine(),
"/unattached"),
"sysbus", OBJECT(main_system_bus), NULL);
}
BusState *sysbus_get_default(void)
{
if (!main_system_bus) {
main_system_bus_create();
}
return main_system_bus;
}
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());
}
static void sysbus_register_types(void)
{
type_register_static(&system_bus_info);
type_register_static(&sysbus_device_type_info);
}
type_init(sysbus_register_types)