linux-kernel - Re: [Qemu-devel] [RFC PATCH v2 10/15] cpu-model/s390: Add cpu class initialization routines

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Message-ID: <20150220171249.210a0236@bee>
Date:	Fri, 20 Feb 2015 17:12:49 +0100
From:	Michael Mueller <mimu@...ux.vnet.ibm.com>
To:	Richard Henderson <rth@...ddle.net>
Cc:	qemu-devel@...gnu.org, kvm@...r.kernel.org,
	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
	Gleb Natapov <gleb@...nel.org>, Alexander Graf <agraf@...e.de>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	"Jason J. Herne" <jjherne@...ux.vnet.ibm.com>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Andreas Faerber <afaerber@...e.de>, frank.blaschka@...ibm.com
Subject: Re: [Qemu-devel] [RFC PATCH v2 10/15] cpu-model/s390: Add cpu class
 initialization routines

On Fri, 20 Feb 2015 08:02:42 -0800
Richard Henderson <rth@...ddle.net> wrote:

> > +/**
> > + * s390_test_facility - test if given facility bit is set facility list
> > + *                      of given cpu class
> > + * @class: address of cpu class to test
> > + * @nr: bit number to test
> > + *
> > + * Returns: true in case it is set
> > + *          false in case it is not set
> > + */
> > +bool s390_test_facility(S390CPUClass *cc, unsigned long nr)
> > +{
> > +    if (cc) {
> > +        return test_facility(nr, cc->fac_list) ? true : false;
> > +    }
> > +    return false;
> > +}  
> 
> Where do you see this being used?

Good spot, it's not being used yet. It's planned to be used with a patch that implements zPCI
related instructions on QEMU side. Maybe you have seen the discussion from Frank Blaschka in this
e-mail list in regard to that.

Michael

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