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qdev: rework device properties.

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This patch is a major overhaul of the device properties.  The properties
are saved directly in the device state struct now, the linked list of
property values is gone.

Advantages:
  * We don't have to maintain the list with the property values.
  * The value in the property list and the value actually used by
    the device can't go out of sync any more (used to happen for
    the pci.devfn == -1 case) because there is only one place where
    the value is stored.
  * A record describing the property is required now, you can't set
    random properties any more.

There are bus-specific and device-specific properties.  The former
should be used for properties common to all bus drivers.  Typical
use case is bus addressing, i.e. pci.devfn and i2c.address.

Properties have a PropertyInfo struct attached with name, size and
function pointers to parse and print properties.  A few common property
types have PropertyInfos defined in qdev-properties.c.  Drivers are free
to implement their own very special property parsers if needed.

Properties can have default values.  If unset they are zero-filled.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-07-15 13:43:31 +02:00 • committed by Anthony Liguori
parent f114784f69
commit ee6847d19b
47 changed files with 921 additions and 391 deletions
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4
hw/syborg.c
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@ -64,7 +64,7 @@ static void syborg_init(ram_addr_t ram_size,
sysbus_create_simple("syborg,rtc", 0xC0001000, NULL);
dev = qdev_create(NULL, "syborg,timer");
qdev_set_prop_int(dev, "frequency", 1000000);
qdev_prop_set_uint32(dev, "frequency", 1000000);
qdev_init(dev);
sysbus_mmio_map(sysbus_from_qdev(dev), 0, 0xC0002000);
sysbus_connect_irq(sysbus_from_qdev(dev), 0, pic[1]);
@ -83,7 +83,7 @@ static void syborg_init(ram_addr_t ram_size,
qemu_check_nic_model(&nd_table[0], "virtio");
dev = qdev_create(NULL, "syborg,virtio-net");
qdev_set_netdev(dev, &nd_table[0]);
dev->nd = &nd_table[0];
qdev_init(dev);
s = sysbus_from_qdev(dev);
sysbus_mmio_map(s, 0, 0xc000c000);