| Message ID | 1499803333-9052-3-git-send-email-mark.cave-ayland@ilande.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Jul 11, 2017 at 09:02:12PM +0100, Mark Cave-Ayland wrote: > When looking to instantiate a TYPE_FW_CFG_MEM or TYPE_FW_CFG_IO device to be > able to wire it up differently, it is much more convenient for the caller to > instantiate the device and have the fw_cfg default files already preloaded > during realize. > > Move fw_cfg_init1() to the end of both the fw_cfg_mem_realize() and > fw_cfg_io_realize() functions so it no longer needs to be called manually > when instantiating the device, and also rename it to fw_cfg_common_realize() > which better describes its new purpose. > > Since it is now the responsibility of the machine to wire up the fw_cfg device > it is necessary to introduce a object_property_add_child() call into > fw_cfg_init_io() and fw_cfg_init_mem() to link the fw_cfg device to the root > machine object as before. > > Finally with the previous change to fw_cfg_find() we can now remove the > assert() preventing multiple fw_cfg devices being instantiated and replace > them with a simple call to fw_cfg_find() at realize time instead. This allows > us to remove FW_CFG_NAME and FW_CFG_PATH since they are no longer required. > > Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> > Reviewed-by: Igor Mammedov <imammedo@redhat.com> [...] > @@ -1096,6 +1097,12 @@ static void fw_cfg_io_realize(DeviceState *dev, Error **errp) > &fw_cfg_dma_mem_ops, FW_CFG(s), "fwcfg.dma", > sizeof(dma_addr_t)); > } > + > + fw_cfg_common_realize(dev, &local_err); > + if (local_err) { > + error_propagate(errp, local_err); > + return; > + } > } "if (local_err)" is redundant, as error_propagate() does nothing if local_err is NULL. "return" is also unnecessary here. You also don't need local_err/error_propagate() if you are not looking at the value of local_err at all. This means those 5 lines can be simply written as: fw_cfg_common_realize(dev, errp); (Sorry for not noticing that in v7) > > static void fw_cfg_io_class_init(ObjectClass *klass, void *data) > @@ -1162,6 +1169,12 @@ static void fw_cfg_mem_realize(DeviceState *dev, Error **errp) > sizeof(dma_addr_t)); > sysbus_init_mmio(sbd, &FW_CFG(s)->dma_iomem); > } > + > + fw_cfg_common_realize(dev, &local_err); > + if (local_err) { > + error_propagate(errp, local_err); > + return; > + } Same as above. > } > > static void fw_cfg_mem_class_init(ObjectClass *klass, void *data) > -- > 1.7.10.4 >
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c index 8ef889a..6e96b92 100644 --- a/hw/nvram/fw_cfg.c +++ b/hw/nvram/fw_cfg.c @@ -37,9 +37,6 @@ #define FW_CFG_FILE_SLOTS_DFLT 0x20 -#define FW_CFG_NAME "fw_cfg" -#define FW_CFG_PATH "/machine/" FW_CFG_NAME - #define TYPE_FW_CFG "fw_cfg" #define TYPE_FW_CFG_IO "fw_cfg_io" #define TYPE_FW_CFG_MEM "fw_cfg_mem" @@ -909,17 +906,16 @@ static void fw_cfg_machine_ready(struct Notifier *n, void *data) -static void fw_cfg_init1(DeviceState *dev) +static void fw_cfg_common_realize(DeviceState *dev, Error **errp) { FWCfgState *s = FW_CFG(dev); MachineState *machine = MACHINE(qdev_get_machine()); uint32_t version = FW_CFG_VERSION; - assert(!object_resolve_path(FW_CFG_PATH, NULL)); - - object_property_add_child(OBJECT(machine), FW_CFG_NAME, OBJECT(s), NULL); - - qdev_init_nofail(dev); + if (!fw_cfg_find()) { + error_setg(errp, "at most one %s device is permitted", TYPE_FW_CFG); + return; + } fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4); fw_cfg_add_bytes(s, FW_CFG_UUID, &qemu_uuid, 16); @@ -952,7 +948,9 @@ FWCfgState *fw_cfg_init_io_dma(uint32_t iobase, uint32_t dma_iobase, qdev_prop_set_bit(dev, "dma_enabled", false); } - fw_cfg_init1(dev); + object_property_add_child(OBJECT(qdev_get_machine()), TYPE_FW_CFG, + OBJECT(dev), NULL); + qdev_init_nofail(dev); sbd = SYS_BUS_DEVICE(dev); ios = FW_CFG_IO(dev); @@ -990,7 +988,9 @@ FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr, qdev_prop_set_bit(dev, "dma_enabled", false); } - fw_cfg_init1(dev); + object_property_add_child(OBJECT(qdev_get_machine()), TYPE_FW_CFG, + OBJECT(dev), NULL); + qdev_init_nofail(dev); sbd = SYS_BUS_DEVICE(dev); sysbus_mmio_map(sbd, 0, ctl_addr); @@ -1025,6 +1025,7 @@ FWCfgState *fw_cfg_find(void) return FW_CFG(object_resolve_path_type("", TYPE_FW_CFG, NULL)); } + static void fw_cfg_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); @@ -1096,6 +1097,12 @@ static void fw_cfg_io_realize(DeviceState *dev, Error **errp) &fw_cfg_dma_mem_ops, FW_CFG(s), "fwcfg.dma", sizeof(dma_addr_t)); } + + fw_cfg_common_realize(dev, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } } static void fw_cfg_io_class_init(ObjectClass *klass, void *data) @@ -1162,6 +1169,12 @@ static void fw_cfg_mem_realize(DeviceState *dev, Error **errp) sizeof(dma_addr_t)); sysbus_init_mmio(sbd, &FW_CFG(s)->dma_iomem); } + + fw_cfg_common_realize(dev, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } } static void fw_cfg_mem_class_init(ObjectClass *klass, void *data)