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Re: [Qemu-devel] [RFC PATCH v2 13/15] cpu-model/s390: Add processor prop

From: Michael Mueller
Subject: Re: [Qemu-devel] [RFC PATCH v2 13/15] cpu-model/s390: Add processor property routines
Date: Fri, 20 Feb 2015 17:53:21 +0100

On Fri, 20 Feb 2015 17:28:14 +0100
Andreas Färber <address@hidden> wrote:


> Sorry for my ignorance, but what is proc actually needed for? For
> initializing the class, there's .class_init (and cc->fac_list apparently
> is initialized here). If you need to pass info to KVM, you can do so in

yes, it is communication to the accelerator to prepare its local cpu model 
related data
structures which are used to initialize a vcpu (e.g. the facility list beside 

> DeviceClass::realize when the vCPU actually goes "live". A

I will look what "goes live" in detail means here, it should at least be before
kvm_arch_vcpu_setup() gets triggered on accelerator side.

> string-to-string (or string-to-ObjectClass) translation function seems
> like a weird point in time to take action with global effect.
> Anyway, please implement the generic callback, then you can still call
> it from your own helper functions if needed.

Thanks a lot!

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