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Re: [Qemu-arm] [PATCH RFC 0/8] cpus: make "-cpu cpux, features" global p

From: Eduardo Habkost
Subject: Re: [Qemu-arm] [PATCH RFC 0/8] cpus: make "-cpu cpux, features" global properties
Date: Wed, 1 Jun 2016 15:51:10 -0300
User-agent: Mutt/1.6.1 (2016-04-27)

On Wed, Jun 01, 2016 at 07:21:00PM +0100, Peter Maydell wrote:
> On 1 June 2016 at 17:37, Igor Mammedov <address@hidden> wrote:
> > Current CLI option -cpu cpux,features serves as template
> > for all created cpus of type: cpux. However QEMU parses
> > "features" every time it creates a cpu instance and applies
> > them to it while doing parsing.
> >
> > That doesn't work well with -device/device_add infrastructure
> > as it has no idea about cpu specific hooks that's used for
> > parsing "features".
> > In order to make -device/device_add utilize "-cpu features"
> > template convert it into a set of global properties, so that
> > every new CPU created will have them applied automatically.
> Is there a plan for supporting heterogenous CPU setups?
> (We don't really do those very well at the moment, but
> we might in future. The closest we come today is the
> zynqmp SoC which has Cortex-R5s and A53s in it.)

I am not aware of any specific plan, but this series gets us
closer to eventually replacing -cpu (which doesn't allow
heterogenous CPU setups) with simple -device/-global combinations
(which would be more flexible).


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