Re: [Qemu-devel] [PATCH v3 00/14] qemu: generate acpi tables for the guest

[Andreas Färber]

Am 25.07.2013 19:18, schrieb Michael S. Tsirkin:
> On Thu, Jul 25, 2013 at 05:50:55PM +0200, Andreas Färber wrote:
>> Am 24.07.2013 18:01, schrieb Michael S. Tsirkin:
>>> This code can also be found here:
>>> git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git acpi
>>>
>>> Please review, and consider for 1.6.
>>
>> Quite frankly, this is still not looking the way I imagined it based on
>> the KVM call discussion and Anthony's comments that I remember:
> 
> By the way, for examples which are exactly
> like this code here, look no further than:
> 
>       FWCfgState *fw_cfg_find(void);
> 
> and the use in hw/misc/pvpanic.c of said API.
> 
> Here we have device implementing an API to find it, and through this
> pointer, it is accessed by more APIs access its state.
> 
> This is exactly what my patches do for piix etc.
> 
> So if you don't like this approach, please change
> existing code using it.

According to git-blame that code was recently added by you:
http://repo.or.cz/w/qemu.git/commit/600c60b76d0682f6c39d19bfff79da9321e8cf86?f=hw/nvram/fw_cfg.c

So the existing-code argument is kind of moot. ;)

Further, that returns the device's state struct and does not copy fields
from that state struct into another state struct.

BTW if you want to avoid repeatedly hardcoding things, fw_cfg should be
using object_resolve_path_component(), I'll prepare a patch.

Andreas

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