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Re: [libvirt] [Qemu-devel] [PATCH qom-cpu 10/11] target-i386: Call kvm_check_features_against_host() only if CONFIG_KVM is set



On Sun, Jan 06, 2013 at 04:27:19PM +0200, Gleb Natapov wrote:
> On Fri, Jan 04, 2013 at 08:01:11PM -0200, Eduardo Habkost wrote:
> > This will be necessary once kvm_check_features_against_host() starts
> > using KVM-specific definitions (so it won't compile anymore if
> > CONFIG_KVM is not set).
> > 
> > Signed-off-by: Eduardo Habkost <ehabkost redhat com>
> > ---
> >  target-i386/cpu.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> > index 1c3c7e1..876b0f6 100644
> > --- a/target-i386/cpu.c
> > +++ b/target-i386/cpu.c
> > @@ -936,6 +936,7 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def)
> >  #endif /* CONFIG_KVM */
> >  }
> >  
> > +#ifdef CONFIG_KVM
> >  static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
> >  {
> >      int i;
> > @@ -987,6 +988,7 @@ static int kvm_check_features_against_host(x86_def_t *guest_def)
> >                  }
> >      return rv;
> >  }
> > +#endif
> >  
> >  static void x86_cpuid_version_get_family(Object *obj, Visitor *v, void *opaque,
> >                                           const char *name, Error **errp)
> > @@ -1410,10 +1412,12 @@ static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features)
> >      x86_cpu_def->kvm_features &= ~minus_kvm_features;
> >      x86_cpu_def->svm_features &= ~minus_svm_features;
> >      x86_cpu_def->cpuid_7_0_ebx_features &= ~minus_7_0_ebx_features;
> > +#ifdef CONFIG_KVM
> >      if (check_cpuid && kvm_enabled()) {
> >          if (kvm_check_features_against_host(x86_cpu_def) && enforce_cpuid)
> >              goto error;
> >      }
> > +#endif
> Provide kvm_check_features_against_host() stub if !CONFIG_KVM and drop
> ifdef here.

I will do. Igor probably will have to change his "target-i386: move
kvm_check_features_against_host() check to realize time" patch to use
the same approach, too.

-- 
Eduardo


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