Re: [Qemu-devel] [PATCH 2/5] machine: introduce get_fw_dev_path() callback

[Paolo Bonzini <pbonzini@redhat.com>]

Il 25/11/2013 08:27, Alexey Kardashevskiy ha scritto:
> QEMU supports firmware names for all devices in the QEMU tree but
> sometime the exact format differs from what sPAPR platform uses.
> 
> This introduces a callback to let a machine fix device tree path names.
> 
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> ---
>  hw/core/qdev.c      | 15 ++++++++++++++-
>  include/hw/boards.h |  1 +
>  2 files changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/core/qdev.c b/hw/core/qdev.c
> index e374a93..7347483 100644
> --- a/hw/core/qdev.c
> +++ b/hw/core/qdev.c
> @@ -26,6 +26,7 @@
>     this API directly.  */
>  
>  #include "hw/qdev.h"
> +#include "hw/boards.h"
>  #include "sysemu/sysemu.h"
>  #include "qapi/error.h"
>  #include "qapi/qmp/qerror.h"
> @@ -497,6 +498,15 @@ static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
>      return NULL;
>  }
>  
> +static char *machine_get_fw_dev_path(BusState *bus, DeviceState *dev)
> +{
> +    if (current_machine->get_fw_dev_path) {
> +        return current_machine->get_fw_dev_path(bus, dev);
> +    }
> +
> +    return NULL;
> +}
> +
>  static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
>  {
>      int l = 0;
> @@ -504,7 +514,10 @@ static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
>      if (dev && dev->parent_bus) {
>          char *d;
>          l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
> -        d = bus_get_fw_dev_path(dev->parent_bus, dev);
> +        d = machine_get_fw_dev_path(dev->parent_bus, dev);
> +        if (!d) {
> +            d = bus_get_fw_dev_path(dev->parent_bus, dev);
> +        }
>          if (d) {
>              l += snprintf(p + l, size - l, "%s", d);
>              g_free(d);
> diff --git a/include/hw/boards.h b/include/hw/boards.h
> index 5a7ae9f..50ff24a 100644
> --- a/include/hw/boards.h
> +++ b/include/hw/boards.h
> @@ -43,6 +43,7 @@ typedef struct QEMUMachine {
>      GlobalProperty *compat_props;
>      struct QEMUMachine *next;
>      const char *hw_version;
> +    char *(*get_fw_dev_path)(BusState *bus, DeviceState *dev);
>  } QEMUMachine;
>  
>  int qemu_register_machine(QEMUMachine *m);
> 

You can check "if (current_machine &&
current_machine->get_fw_dev_path)", and move current_machine from vl.c
to hw/qdev/core.c.

Paolo