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qdev: Introduce FWPathProvider interface

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QEMU supports firmware names for all devices in the QEMU tree but
some architectures expect some parts of firmware path names in different
format.

This introduces a firmware-pathname-change interface definition.
If some machines needs to redefine the firmware path format, it has
to add the TYPE_FW_PATH_PROVIDER interface to an object that is above
the device on the QOM tree (typically /machine).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Paolo Bonzini 2014-03-17 13:40:23 +11:00 • committed by Andreas Färber
parent 30e32af746
commit 6b1566cbe3
5 changed files with 117 additions and 1 deletions
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51
hw/core/fw-path-provider.c Normal file
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/*
* Firmware patch provider class and helpers.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; under version 2 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "hw/fw-path-provider.h"
char *fw_path_provider_get_dev_path(FWPathProvider *p, BusState *bus,
DeviceState *dev)
{
FWPathProviderClass *k = FW_PATH_PROVIDER_GET_CLASS(p);
return k->get_dev_path(p, bus, dev);
}
char *fw_path_provider_try_get_dev_path(Object *o, BusState *bus,
DeviceState *dev)
{
FWPathProvider *p = (FWPathProvider *)
object_dynamic_cast(o, TYPE_FW_PATH_PROVIDER);
if (p) {
return fw_path_provider_get_dev_path(p, bus, dev);
}
return NULL;
}
static const TypeInfo fw_path_provider_info = {
.name = TYPE_FW_PATH_PROVIDER,
.parent = TYPE_INTERFACE,
.class_size = sizeof(FWPathProviderClass),
};
static void fw_path_provider_register_types(void)
{
type_register_static(&fw_path_provider_info);
}
type_init(fw_path_provider_register_types)