Re: [Qemu-devel] [PATCH RFC 1/1] s390x/ccw: create s390 phb for compat reasons as well

[Cornelia Huck <cohuck@redhat.com>]

On Fri, 15 Sep 2017 13:57:40 +0200
David Hildenbrand <david@redhat.com> wrote:

> As an alternative, simply
> 
> diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
> index 0f28ebd162..0f22efc3b6 100644
> --- a/target/s390x/cpu_models.c
> +++ b/target/s390x/cpu_models.c
> @@ -195,6 +195,8 @@ bool s390_has_feat(S390Feat feat)
>                  return true;
>              }
>          }
> +        if (feat == S390_FEAT_ZPCI)
> +            return true;

Move that out of the CONFIG_KVM #ifdef?

(Also, we still have the issue with pci support :/ - depend on
pci_available?)

>  #endif
>          return 0;
>      }
> 
> 
> (this is also the way we handle other features without cpu model support
> -especially if cpu model support is disabled for older machines)

Now that you mention cpu models (which are disabled on old machines),
the failure starts to look plausible :)