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Date: Fri, 8 Dec 2017 15:50:50 +0100
From: Igor Mammedov <imammedo@redhat.com>
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Subject: Re: [Qemu-devel] in a device or CPU instance init/realize,
 can I rely on something having the BQL or equivalent?
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Eduardo Habkost <ehabkost@redhat.com>, QEMU Developers <qemu-devel@nongnu.org>, Paolo Bonzini <pbonzini@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>

On Fri, 8 Dec 2017 13:19:27 +0000
Peter Maydell <peter.maydell@linaro.org> wrote:

> On 8 December 2017 at 13:16, Igor Mammedov <imammedo@redhat.com> wrote:
> > TBH:
> >  I do not recall why we have x86 max/host cpu types do feature
> >  loading at realize time instead of at class init like the rest
> >  of static cpu types.  
> 
> class init is too early, IIRC -- it's before KVM has been set up at all.

that shouldn't be an issue as kvm_ppc_register_host_cpu_type() demonstrates
(i.e. an additional class init at kvm/tcg init time),

so it might be some compat issue or just legacy approach why it
havn't been rewritten to class_init for x86 the way PPC does.
But Eduardo probably knows better if there is anything left that
prevents using class init there.

> 
> thanks
> -- PMM