Re: [PATCH v2 1/1] target/s390x: Allow 2G hugepages guest backing

[Claudio Imbrenda <imbrenda@linux.ibm.com>]

On Wed, 29 Jul 2026 13:53:01 -0400
Matthew Rosato <mjrosato@linux.ibm.com> wrote:

> > -        if (kvm_enabled() && kvm_s390_get_hpage_1m()) {
> > +        if (kvm_enabled() && kvm_s390_get_hpage()) {  
> 
> ...
> 
> >  
> > -    cap_hpage_1m = 1;
> > +int kvm_s390_get_hpage(void)
> > +{
> > +    return cap_hpage;
> >  }
> >  
> >  int kvm_s390_get_hpage_1m(void)
> >  {
> > -    return cap_hpage_1m;
> > +    return cap_hpage == 1;
> > +}
> > +
> > +int kvm_s390_get_hpage_2g(void)
> > +{
> > +    return cap_hpage == 2;
> >  }  
> 
> Hey Claudio,
> 
> Thanks for changing things to differentiate between 1m and 2g for the cap.
> 
> Overall LGTM but this patch now makes kvm_s390_get_hpage_1m() dead code
> (not referenced anywhere) as well as introduces a new function
> kvm_s390_get_hpage_2g() that is also unused.
> 
> Since this patch is by itself, why not just remove the functions
> until/if they are needed and only provide kvm_s390_get_hpage()?
> 
> Do you have planned future patches that you are confident will soon make
> use of these get_hpage_1m() and get_hpage_2g() helpers?

yes, which is why I put them there :)

but I understand that dead code is annoying, if you want I can simply
respin without the unused functions, and introduce them later when they
are actually needed.

> 
> Thanks,
> Matt
> 
> 
>