Re: [PATCH v2 6/8] target/ppc: allow ppc_cpu_do_system_reset to take an alternate vector

[David Gibson <david@gibson.dropbear.id.au>]

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On Mon, Mar 16, 2020 at 07:15:14PM +0100, Cédric Le Goater wrote:
> On 3/16/20 3:26 PM, Nicholas Piggin wrote:
> > Provide for an alternate delivery location, -1 defaults to the
> > architected address.
> 
> I don't know what is the best approach, to override the vector addr
> computed by powerpc_excp() or use a machine class handler with 
> cpu->vhyp.

Again, in the interests of getting this in for the soft freeze, I've
applied this now.  We can clean it up later.

> 
> > Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> > ---
> >  hw/ppc/spapr.c           | 2 +-
> >  target/ppc/cpu.h         | 2 +-
> >  target/ppc/excp_helper.c | 5 ++++-
> >  3 files changed, 6 insertions(+), 3 deletions(-)
> > 
> > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> > index 5f93c49706..25221d843c 100644
> > --- a/hw/ppc/spapr.c
> > +++ b/hw/ppc/spapr.c
> > @@ -3400,7 +3400,7 @@ static void spapr_machine_finalizefn(Object *obj)
> >  void spapr_do_system_reset_on_cpu(CPUState *cs, run_on_cpu_data arg)
> >  {
> >      cpu_synchronize_state(cs);
> > -    ppc_cpu_do_system_reset(cs);
> > +    ppc_cpu_do_system_reset(cs, -1);
> >  }
> >  
> >  static void spapr_nmi(NMIState *n, int cpu_index, Error **errp)
> > diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
> > index 3953680534..f8c7d6f19c 100644
> > --- a/target/ppc/cpu.h
> > +++ b/target/ppc/cpu.h
> > @@ -1220,7 +1220,7 @@ int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
> >  int ppc32_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
> >                                 int cpuid, void *opaque);
> >  #ifndef CONFIG_USER_ONLY
> > -void ppc_cpu_do_system_reset(CPUState *cs);
> > +void ppc_cpu_do_system_reset(CPUState *cs, target_ulong vector);
> >  void ppc_cpu_do_fwnmi_machine_check(CPUState *cs, target_ulong vector);
> >  extern const VMStateDescription vmstate_ppc_cpu;
> >  #endif
> > diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
> > index 7f2b5899d3..08bc885ca6 100644
> > --- a/target/ppc/excp_helper.c
> > +++ b/target/ppc/excp_helper.c
> > @@ -961,12 +961,15 @@ static void ppc_hw_interrupt(CPUPPCState *env)
> >      }
> >  }
> >  
> > -void ppc_cpu_do_system_reset(CPUState *cs)
> > +void ppc_cpu_do_system_reset(CPUState *cs, target_ulong vector)
> >  {
> >      PowerPCCPU *cpu = POWERPC_CPU(cs);
> >      CPUPPCState *env = &cpu->env;
> >  
> >      powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_RESET);
> > +    if (vector != -1) {
> > +        env->nip = vector;
> > +    }
> >  }
> >  
> >  void ppc_cpu_do_fwnmi_machine_check(CPUState *cs, target_ulong vector)
> > 
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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