Re: [Qemu-devel] [PATCH RFC 2/8] target-i386: cpu: move xcc->kvm_required check to reaize time

[Igor Mammedov <imammedo@redhat.com>]

On Wed, 1 Jun 2016 14:46:51 -0300
Eduardo Habkost <ehabkost@redhat.com> wrote:

> On Wed, Jun 01, 2016 at 06:37:24PM +0200, Igor Mammedov wrote:
> > it will allow to drop custom cpu_x86_init() and use
> > cpu_generic_init() instead reducing cpu_x86_create()
> > to a simple 3-liner.
> > 
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> 
> Nice, it also gets us closer to finally making X86CPU
> qmp_device_list_properties()-safe. Only one request:
> 
> > ---
> >  target-i386/cpu.c | 14 +++++++-------
> >  1 file changed, 7 insertions(+), 7 deletions(-)
> > 
> > diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> > index 6159a7f..c31afc7 100644
> > --- a/target-i386/cpu.c
> > +++ b/target-i386/cpu.c
> > @@ -2200,7 +2200,6 @@ static void x86_cpu_load_def(X86CPU *cpu,
> > X86CPUDefinition *def, Error **errp) X86CPU *cpu_x86_create(const
> > char *cpu_model, Error **errp) {
> >      X86CPU *cpu = NULL;
> > -    X86CPUClass *xcc;
> >      ObjectClass *oc;
> >      gchar **model_pieces;
> >      char *name, *features;
> > @@ -2219,12 +2218,6 @@ X86CPU *cpu_x86_create(const char
> > *cpu_model, Error **errp) error_setg(&error, "Unable to find CPU
> > definition: %s", name); goto out;
> >      }
> > -    xcc = X86_CPU_CLASS(oc);
> > -
> > -    if (xcc->kvm_required && !kvm_enabled()) {
> > -        error_setg(&error, "CPU model '%s' requires KVM", name);
> > -        goto out;
> > -    }
> >  
> >      cpu = X86_CPU(object_new(object_class_get_name(oc)));
> >  
> > @@ -2901,6 +2894,13 @@ static void x86_cpu_realizefn(DeviceState
> > *dev, Error **errp) static bool ht_warned;
> >      FeatureWord w;
> >  
> > +    if (xcc->kvm_required && !kvm_enabled()) {
> > +        char *name = g_strdup(object_get_typename(OBJECT(dev)));
> > +        *strstr(name, X86_CPU_TYPE_SUFFIX) = 0;
> 
> I am not sure if I actually like this trick, but in either case
> please use x86_cpu_class_get_model_name().
thanks for pointing out that x86_cpu_class_get_model_name() exists.

> 
> > +        error_setg(&local_err, "CPU model '%s' requires KVM",
> > name);
> > +        goto out;
> > +    }
> > +
> >      if (cpu->apic_id < 0) {
> >          error_setg(errp, "apic-id property was not initialized
> > properly"); return;
> > -- 
> > 1.8.3.1
> > 
>