Re: [Qemu-devel] [PATCH 2/2] hw/ppc/spapr Add qemu_register_boot_set for SPAPR

[Dinar Valeev <dvaleev@suse.de>]

On 01/24/2015 12:04 AM, Alexander Graf wrote:
>
>
> On 23.01.15 23:51, dvaleev@suse.de wrote:
>> From: Dinar Valeev <dvaleev@suse.com>
>>
>> In order to have -boot once=d functioning, it is required to have
>> qemu_register_boot_set
>>
>> qemu-system-ppc64 -enable-kvm -boot once=d
>>
>> Ready!
>> 0 > dev /chosen   ok
>> 0 > .properties
>> ...
>> qemu,boot-device                 d
>> ...
>> 0 > reset-all
>>
>> Ready!
>> 0 > dev /chosen   ok
>> 0 > .properties
>> ...
>> qemu,boot-device                 cdn
>> ...
>>
>> Signed-off-by: Dinar Valeev <dvaleev@suse.com>
>> ---
>>   hw/ppc/spapr.c | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>>
>> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
>> index 3d2cfa3..38b03fc 100644
>> --- a/hw/ppc/spapr.c
>> +++ b/hw/ppc/spapr.c
>> @@ -314,6 +314,16 @@ static void add_str(GString *s, const gchar *s1)
>>       g_string_append_len(s, s1, strlen(s1) + 1);
>>   }
>>
>> +static void spapr_boot_set(void *opaque, const char *boot_device,
>> +                           Error **errp)
>> +{
>> +    int offset;
>> +    offset = fdt_path_offset(opaque, "/chosen");
>> +    fdt_setprop_string(opaque, offset, "qemu,boot-device", boot_device);
>> +
>> +}
>> +
>> +
>>   static void *spapr_create_fdt_skel(hwaddr initrd_base,
>>                                      hwaddr initrd_size,
>>                                      hwaddr kernel_size,
>> @@ -414,6 +424,8 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
>>       if (boot_device) {
>>           _FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
>>       }
>> +    qemu_register_boot_set(spapr_boot_set, fdt);
>
> If you simply move the code above (the _FDT() one) from create_fdt_skel
> to spapr_finalize_fdt() you should have the same net effect and much
> cleaner code :).
Haven't tried it, but I suspect -boot once=d on reset will be still 
equal to -boot d behaviour.

And does it make sense to split boot_device from the rest?
>
> Alex
>
>> +
>>       if (boot_menu) {
>>           _FDT((fdt_property_cell(fdt, "qemu,boot-menu", boot_menu)));
>>       }
>>