Re: [Qemu-devel] [RFC for-2.13 06/12] target/ppc: Move page size setup to helper function

["Cédric Le Goater" <clg@kaod.org>]

On 03/27/2018 06:37 AM, David Gibson wrote:
> Initialization of the env->sps structure at the end of instance_init is
> specific to the 64-bit hash MMU, so move the code into a helper function
> in mmu-hash64.c.
> 
> We also create a corresponding function to be called at finalize time -
> it's empty for now, but we'll need it shortly.
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

Reviewed-by: Cédric Le Goater <clg@kaod.org>

> ---
>  target/ppc/mmu-hash64.c     | 29 +++++++++++++++++++++++++++++
>  target/ppc/mmu-hash64.h     | 11 +++++++++++
>  target/ppc/translate_init.c | 29 +++++++++--------------------
>  3 files changed, 49 insertions(+), 20 deletions(-)
> 
> diff --git a/target/ppc/mmu-hash64.c b/target/ppc/mmu-hash64.c
> index a87fa7c83f..4cb7d1cf07 100644
> --- a/target/ppc/mmu-hash64.c
> +++ b/target/ppc/mmu-hash64.c
> @@ -1095,3 +1095,32 @@ void helper_store_lpcr(CPUPPCState *env, target_ulong val)
>      ppc_hash64_update_rmls(cpu);
>      ppc_hash64_update_vrma(cpu);
>  }
> +
> +void ppc_hash64_init(PowerPCCPU *cpu)
> +{
> +    CPUPPCState *env = &cpu->env;
> +    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
> +
> +    if (pcc->sps) {
> +        env->sps = *pcc->sps;
> +    } else if (env->mmu_model & POWERPC_MMU_64) {
> +        /* Use default sets of page sizes. We don't support MPSS */
> +        static const struct ppc_segment_page_sizes defsps = {
> +            .sps = {
> +                { .page_shift = 12, /* 4K */
> +                  .slb_enc = 0,
> +                  .enc = { { .page_shift = 12, .pte_enc = 0 } }
> +                },
> +                { .page_shift = 24, /* 16M */
> +                  .slb_enc = 0x100,
> +                  .enc = { { .page_shift = 24, .pte_enc = 0 } }
> +                },
> +            },
> +        };
> +        env->sps = defsps;
> +    }
> +}
> +
> +void ppc_hash64_finalize(PowerPCCPU *cpu)
> +{
> +}
> diff --git a/target/ppc/mmu-hash64.h b/target/ppc/mmu-hash64.h
> index 95a8c330d6..074ded4c27 100644
> --- a/target/ppc/mmu-hash64.h
> +++ b/target/ppc/mmu-hash64.h
> @@ -19,6 +19,8 @@ unsigned ppc_hash64_hpte_page_shift_noslb(PowerPCCPU *cpu,
>                                            uint64_t pte0, uint64_t pte1);
>  void ppc_hash64_update_vrma(PowerPCCPU *cpu);
>  void ppc_hash64_update_rmls(PowerPCCPU *cpu);
> +void ppc_hash64_init(PowerPCCPU *cpu);
> +void ppc_hash64_finalize(PowerPCCPU *cpu);
>  #endif
>  
>  /*
> @@ -136,4 +138,13 @@ static inline uint64_t ppc_hash64_hpte1(PowerPCCPU *cpu,
>  
>  #endif /* CONFIG_USER_ONLY */
>  
> +#if defined(CONFIG_USER_ONLY) || !defined(TARGET_PPC64)
> +static inline void ppc_hash64_init(PowerPCCPU *cpu)
> +{
> +}
> +static inline void ppc_hash64_finalize(PowerPCCPU *cpu)
> +{
> +}
> +#endif
> +
>  #endif /* MMU_HASH64_H */
> diff --git a/target/ppc/translate_init.c b/target/ppc/translate_init.c
> index 99be6fcd68..aa63a5dcb3 100644
> --- a/target/ppc/translate_init.c
> +++ b/target/ppc/translate_init.c
> @@ -10464,26 +10464,14 @@ static void ppc_cpu_instance_init(Object *obj)
>      env->has_hv_mode = !!(env->msr_mask & MSR_HVB);
>  #endif
>  
> -#if defined(TARGET_PPC64)
> -    if (pcc->sps) {
> -        env->sps = *pcc->sps;
> -    } else if (env->mmu_model & POWERPC_MMU_64) {
> -        /* Use default sets of page sizes. We don't support MPSS */
> -        static const struct ppc_segment_page_sizes defsps = {
> -            .sps = {
> -                { .page_shift = 12, /* 4K */
> -                  .slb_enc = 0,
> -                  .enc = { { .page_shift = 12, .pte_enc = 0 } }
> -                },
> -                { .page_shift = 24, /* 16M */
> -                  .slb_enc = 0x100,
> -                  .enc = { { .page_shift = 24, .pte_enc = 0 } }
> -                },
> -            },
> -        };
> -        env->sps = defsps;
> -    }
> -#endif /* defined(TARGET_PPC64) */
> +    ppc_hash64_init(cpu);
> +}
> +
> +static void ppc_cpu_instance_finalize(Object *obj)
> +{
> +    PowerPCCPU *cpu = POWERPC_CPU(obj);
> +
> +    ppc_hash64_finalize(cpu);
>  }
>  
>  static bool ppc_pvr_match_default(PowerPCCPUClass *pcc, uint32_t pvr)
> @@ -10601,6 +10589,7 @@ static const TypeInfo ppc_cpu_type_info = {
>      .parent = TYPE_CPU,
>      .instance_size = sizeof(PowerPCCPU),
>      .instance_init = ppc_cpu_instance_init,
> +    .instance_finalize = ppc_cpu_instance_finalize,
>      .abstract = true,
>      .class_size = sizeof(PowerPCCPUClass),
>      .class_init = ppc_cpu_class_init,
>