Re: [PATCH v7 4/4] target/riscv: Validate misa_mxl_max only once

[Alistair Francis <alistair23@gmail.com>]

On Wed, Dec 13, 2023 at 4:12 PM Akihiko Odaki <akihiko.odaki@daynix.com> wrote:
>
> misa_mxl_max is now a class member and initialized only once for each
> class. This also moves the initialization of gdb_core_xml_file which
> will be referenced before realization in the future.
>
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  target/riscv/cpu.c         | 21 +++++++++++++++++++++
>  target/riscv/tcg/tcg-cpu.c | 23 -----------------------
>  2 files changed, 21 insertions(+), 23 deletions(-)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index 2ab61df2217e..b799f1336041 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -1247,6 +1247,26 @@ static const MISAExtInfo misa_ext_info_arr[] = {
>      MISA_EXT_INFO(RVG, "g", "General purpose (IMAFD_Zicsr_Zifencei)"),
>  };
>
> +static void riscv_cpu_validate_misa_mxl(RISCVCPUClass *mcc)
> +{
> +    CPUClass *cc = CPU_CLASS(mcc);
> +
> +    /* Validate that MISA_MXL is set properly. */
> +    switch (mcc->misa_mxl_max) {
> +#ifdef TARGET_RISCV64
> +    case MXL_RV64:
> +    case MXL_RV128:
> +        cc->gdb_core_xml_file = "riscv-64bit-cpu.xml";
> +        break;
> +#endif
> +    case MXL_RV32:
> +        cc->gdb_core_xml_file = "riscv-32bit-cpu.xml";
> +        break;
> +    default:
> +        g_assert_not_reached();
> +    }
> +}
> +
>  static int riscv_validate_misa_info_idx(uint32_t bit)
>  {
>      int idx;
> @@ -1695,6 +1715,7 @@ static void riscv_cpu_class_init(ObjectClass *c, void *data)
>      RISCVCPUClass *mcc = RISCV_CPU_CLASS(c);
>
>      mcc->misa_mxl_max = (uint32_t)(uintptr_t)data;
> +    riscv_cpu_validate_misa_mxl(mcc);
>  }
>
>  static void riscv_isa_string_ext(RISCVCPU *cpu, char **isa_str,
> diff --git a/target/riscv/tcg/tcg-cpu.c b/target/riscv/tcg/tcg-cpu.c
> index 7f6712c81a49..eb243e011ca3 100644
> --- a/target/riscv/tcg/tcg-cpu.c
> +++ b/target/riscv/tcg/tcg-cpu.c
> @@ -148,27 +148,6 @@ static void riscv_cpu_validate_misa_priv(CPURISCVState *env, Error **errp)
>      }
>  }
>
> -static void riscv_cpu_validate_misa_mxl(RISCVCPU *cpu)
> -{
> -    RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu);
> -    CPUClass *cc = CPU_CLASS(mcc);
> -
> -    /* Validate that MISA_MXL is set properly. */
> -    switch (mcc->misa_mxl_max) {
> -#ifdef TARGET_RISCV64
> -    case MXL_RV64:
> -    case MXL_RV128:
> -        cc->gdb_core_xml_file = "riscv-64bit-cpu.xml";
> -        break;
> -#endif
> -    case MXL_RV32:
> -        cc->gdb_core_xml_file = "riscv-32bit-cpu.xml";
> -        break;
> -    default:
> -        g_assert_not_reached();
> -    }
> -}
> -
>  static void riscv_cpu_validate_priv_spec(RISCVCPU *cpu, Error **errp)
>  {
>      CPURISCVState *env = &cpu->env;
> @@ -676,8 +655,6 @@ static bool tcg_cpu_realize(CPUState *cs, Error **errp)
>          return false;
>      }
>
> -    riscv_cpu_validate_misa_mxl(cpu);
> -
>  #ifndef CONFIG_USER_ONLY
>      CPURISCVState *env = &cpu->env;
>      Error *local_err = NULL;
>
> --
> 2.43.0
>
>