Re: [PATCH v3 11/33] target/ppc/mmu_common.c: Move some debug logging

["Nicholas Piggin" <npiggin@gmail.com>]

On Wed May 8, 2024 at 10:15 AM AEST, BALATON Zoltan wrote:
> Move the debug logging within ppc6xx_tlb_check() from after its only
> call to simplify the caller.
>

I *think* the logic looks right.

> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> ---
>  target/ppc/mmu_common.c | 55 +++++++++++++++++++----------------------
>  1 file changed, 26 insertions(+), 29 deletions(-)
>
> diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
> index 9d337a73ba..b2f2cee1a8 100644
> --- a/target/ppc/mmu_common.c
> +++ b/target/ppc/mmu_common.c
> @@ -225,17 +225,14 @@ static int ppc6xx_tlb_check(CPUPPCState *env, mmu_ctx_t *ctx,
>                        access_type == MMU_INST_FETCH ? 'I' : 'D');
>          switch (ppc6xx_tlb_pte_check(ctx, tlb->pte0, tlb->pte1,
>                                       0, access_type)) {
> -        case -3:
> -            /* TLB inconsistency */
> -            return -1;
>          case -2:
>              /* Access violation */
>              ret = -2;
>              best = nr;
>              break;
> -        case -1:
> +        case -1: /* No match */
> +        case -3: /* TLB inconsistency */
>          default:
> -            /* No match */
>              break;
>          case 0:
>              /* access granted */
> @@ -251,14 +248,37 @@ static int ppc6xx_tlb_check(CPUPPCState *env, mmu_ctx_t *ctx,
>          }
>      }
>      if (best != -1) {
> -    done:
> +done:
>          qemu_log_mask(CPU_LOG_MMU, "found TLB at addr " HWADDR_FMT_plx
>                        " prot=%01x ret=%d\n",
>                        ctx->raddr & TARGET_PAGE_MASK, ctx->prot, ret);
>          /* Update page flags */
>          pte_update_flags(ctx, &env->tlb.tlb6[best].pte1, ret, access_type);
>      }
> +#if defined(DUMP_PAGE_TABLES)
> +        if (qemu_loglevel_mask(CPU_LOG_MMU)) {
> +            CPUState *cs = env_cpu(env);
> +            PowerPCCPU *cpu = env_archcpu(env);

Do you need to de-indent this one level?

Otherwise, 

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>

Thanks,
Nick

> +            hwaddr curaddr;
> +            uint32_t a0, a1, a2, a3;
>  
> +            qemu_log("Page table: " HWADDR_FMT_plx " len " HWADDR_FMT_plx "\n",
> +                     ppc_hash32_hpt_base(cpu), ppc_hash32_hpt_mask(cpu) + 0x80);
> +            for (curaddr = ppc_hash32_hpt_base(cpu);
> +                 curaddr < (ppc_hash32_hpt_base(cpu)
> +                            + ppc_hash32_hpt_mask(cpu) + 0x80);
> +                 curaddr += 16) {
> +                a0 = ldl_phys(cs->as, curaddr);
> +                a1 = ldl_phys(cs->as, curaddr + 4);
> +                a2 = ldl_phys(cs->as, curaddr + 8);
> +                a3 = ldl_phys(cs->as, curaddr + 12);
> +                if (a0 != 0 || a1 != 0 || a2 != 0 || a3 != 0) {
> +                    qemu_log(HWADDR_FMT_plx ": %08x %08x %08x %08x\n",
> +                             curaddr, a0, a1, a2, a3);
> +                }
> +            }
> +        }
> +#endif
>      return ret;
>  }
>  
> @@ -420,29 +440,6 @@ static int mmu6xx_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
>          ctx->raddr = (hwaddr)-1ULL;
>          /* Software TLB search */
>          ret = ppc6xx_tlb_check(env, ctx, eaddr, access_type);
> -#if defined(DUMP_PAGE_TABLES)
> -        if (qemu_loglevel_mask(CPU_LOG_MMU)) {
> -            CPUState *cs = env_cpu(env);
> -            hwaddr curaddr;
> -            uint32_t a0, a1, a2, a3;
> -
> -            qemu_log("Page table: " HWADDR_FMT_plx " len " HWADDR_FMT_plx "\n",
> -                     ppc_hash32_hpt_base(cpu), ppc_hash32_hpt_mask(cpu) + 0x80);
> -            for (curaddr = ppc_hash32_hpt_base(cpu);
> -                 curaddr < (ppc_hash32_hpt_base(cpu)
> -                            + ppc_hash32_hpt_mask(cpu) + 0x80);
> -                 curaddr += 16) {
> -                a0 = ldl_phys(cs->as, curaddr);
> -                a1 = ldl_phys(cs->as, curaddr + 4);
> -                a2 = ldl_phys(cs->as, curaddr + 8);
> -                a3 = ldl_phys(cs->as, curaddr + 12);
> -                if (a0 != 0 || a1 != 0 || a2 != 0 || a3 != 0) {
> -                    qemu_log(HWADDR_FMT_plx ": %08x %08x %08x %08x\n",
> -                             curaddr, a0, a1, a2, a3);
> -                }
> -            }
> -        }
> -#endif
>      } else {
>          qemu_log_mask(CPU_LOG_MMU, "direct store...\n");
>          /* Direct-store segment : absolutely *BUGGY* for now */