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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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47
include/hw/fw-path-provider.h Normal file
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/*
* Firmware patch provider class and helpers definitions.
*
* 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/>.
*/
#ifndef FW_PATH_PROVIDER_H
#define FW_PATH_PROVIDER_H 1
#include "qemu-common.h"
#include "qom/object.h"
#define TYPE_FW_PATH_PROVIDER "fw-path-provider"
#define FW_PATH_PROVIDER_CLASS(klass) \
OBJECT_CLASS_CHECK(FWPathProviderClass, (klass), TYPE_FW_PATH_PROVIDER)
#define FW_PATH_PROVIDER_GET_CLASS(obj) \
OBJECT_GET_CLASS(FWPathProviderClass, (obj), TYPE_FW_PATH_PROVIDER)
#define FW_PATH_PROVIDER(obj) \
INTERFACE_CHECK(FWPathProvider, (obj), TYPE_FW_PATH_PROVIDER)
typedef struct FWPathProvider {
Object parent_obj;
} FWPathProvider;
typedef struct FWPathProviderClass {
InterfaceClass parent_class;
char *(*get_dev_path)(FWPathProvider *p, BusState *bus, DeviceState *dev);
} FWPathProviderClass;
char *fw_path_provider_get_dev_path(FWPathProvider *p, BusState *bus,
DeviceState *dev);
char *fw_path_provider_try_get_dev_path(Object *o, BusState *bus,
DeviceState *dev);
#endif /* FW_PATH_PROVIDER_H */