Re: [PATCH v3 2/5] s390x: Move reset normal to shared reset handler

[Cornelia Huck <cohuck@redhat.com>]

On Mon, 25 Nov 2019 04:03:45 -0500
Janosch Frank <frankja@linux.ibm.com> wrote:

> Let's start moving the cpu reset functions into a single function with
> a switch/case, so we can use fallthroughs and share more code between
> resets.
> 
> This patch introduces the reset function by renaming cpu_reset() and
> cleaning up leftovers.
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> Reviewed-by: David Hildenbrand <david@redhat.com>
> ---
>  target/s390x/cpu-qom.h |  6 +++++-
>  target/s390x/cpu.c     | 16 ++++++++++------
>  target/s390x/cpu.h     |  2 +-
>  target/s390x/sigp.c    |  2 +-
>  4 files changed, 17 insertions(+), 9 deletions(-)
> 

> diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
> index 3abe7e80fd..8d35a2a723 100644
> --- a/target/s390x/cpu.c
> +++ b/target/s390x/cpu.c
> @@ -82,18 +82,22 @@ static void s390_cpu_load_normal(CPUState *s)
>  }
>  #endif
>  
> -/* S390CPUClass::cpu_reset() */
> -static void s390_cpu_reset(CPUState *s)
> +/* S390CPUClass::reset() */
> +static void s390_cpu_reset(CPUState *s, cpu_reset_type type)
>  {
>      S390CPU *cpu = S390_CPU(s);
>      S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
>      CPUS390XState *env = &cpu->env;
>  
> -    env->pfault_token = -1UL;
> -    env->bpbc = false;
>      scc->parent_reset(s);
>      cpu->env.sigp_order = 0;
>      s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);
> +
> +    switch (type) {
> +    case S390_CPU_RESET_NORMAL:
> +        env->pfault_token = -1UL;
> +        env->bpbc = false;

I'm wondering whether we want a default case here to catch programming
errors.

> +    }
>  }
>  
>  /* S390CPUClass::initial_reset() */