diff options
| author | Markus Armbruster <armbru@redhat.com> | 2013-11-29 10:43:45 +0100 |
|---|---|---|
| committer | Andreas Färber <afaerber@suse.de> | 2013-12-24 17:27:17 +0100 |
| commit | c272758f93b9c88c884461a2baa37b8f4008bf02 (patch) | |
| tree | 8cc35db30b347b8243e10a3287aa411295483040 /include/hw | |
| parent | 1b111dc1216be2a89770fdc1ab3dfa8025957442 (diff) | |
| download | qemu-c272758f93b9c88c884461a2baa37b8f4008bf02.tar.gz | |
qdev: Document that pointer properties kill device_add
Ask users of DEFINE_PROP_PTR() to set
cannot_instantiate_with_device_add_yet, or explain why it's not
needed.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/qdev-properties.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h index 692f82e935..77c6f7c037 100644 --- a/include/hw/qdev-properties.h +++ b/include/hw/qdev-properties.h @@ -122,8 +122,25 @@ extern PropertyInfo qdev_prop_arraylen; #define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, int32_t) +/* + * Please avoid pointer properties. If you must use them, you must + * cover them in their device's class init function as follows: + * + * - If the property must be set, the device cannot be used with + * device_add, so add code like this: + * |* Reason: pointer property "NAME-OF-YOUR-PROP" *| + * DeviceClass *dc = DEVICE_CLASS(class); + * dc->cannot_instantiate_with_device_add_yet = true; + * + * - If the property may safely remain null, document it like this: + * |* + * * Note: pointer property "interrupt_vector" may remain null, thus + * * no need for dc->cannot_instantiate_with_device_add_yet = true; + * *| + */ #define DEFINE_PROP_PTR(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*) + #define DEFINE_PROP_CHR(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*) #define DEFINE_PROP_STRING(_n, _s, _f) \ |