Re: [Qemu-devel] ARM cpu object, setting properties from board model

[Igor Mammedov <imammedo@redhat.com>]

On Tue, 19 Nov 2013 20:01:28 +0000
Peter Maydell <peter.maydell@linaro.org> wrote:

> I find myself with a use case where I would like to set
> a CPU object property from the board model init function
> (specifically, I'd like the board model to be able to say
> "this CPU will boot via PSCI so if you're KVM then start
> it appropriately").
> 
> I could just reach in and fiddle with the ARMCPU field
> the way hw/arm/highback.c does with reset_cbar (and in fact
> that's what I'm likely to do for the moment). However it
> seems like it would be nicer for it to be an official
> QOM property. This is alas not currently possible because
> cpu_arm_init() does both 'init' and 'realize', and once
> you've called it it's too late to set properties.
It's possible to use global properties even with cpu_arm_init(),
if it's registered for CPU type before cpu_arm_init() is called.
Than that property would be applied to every new CPU instance
by device_post_init() hook on before object_new() returns.


> 
> Andreas -- did you have any thoughts/plans/code in this area?
> Splitting the realize part out of cpu_arm_init(), or
> providing a cpu_arm_init_dont_realize() [ugh], would be
> easy to code but is it going in the right direction?
> 
> thanks
> -- PMM
> 


-- 
Regards,
  Igor