Re: [PATCH v2 17/22] target/riscv: Allow users to force enable AIA CSRs in HART

[Alistair Francis]

On Thu, Sep 2, 2021 at 10:03 PM Anup Patel <anup.patel@wdc.com> wrote:
>
> We add "x-aia" command-line option for RISC-V HART using which
> allows users to force enable CPU AIA CSRs without changing the
> interrupt controller available in RISC-V machine.
>
> Signed-off-by: Anup Patel <anup.patel@wdc.com>

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

Alistair

> ---
>  target/riscv/cpu.c | 5 +++++
>  target/riscv/cpu.h | 1 +
>  2 files changed, 6 insertions(+)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index e0f4ae4224..9723d54eaf 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -452,6 +452,10 @@ static void riscv_cpu_realize(DeviceState *dev, Error 
> **errp)
>          }
>      }
>
> +    if (cpu->cfg.aia) {
> +        riscv_set_feature(env, RISCV_FEATURE_AIA);
> +    }
> +
>      set_resetvec(env, cpu->cfg.resetvec);
>
>      /* If only XLEN is set for misa, then set misa from properties */
> @@ -672,6 +676,7 @@ static Property riscv_cpu_properties[] = {
>      DEFINE_PROP_BOOL("mmu", RISCVCPU, cfg.mmu, true),
>      DEFINE_PROP_BOOL("pmp", RISCVCPU, cfg.pmp, true),
>      DEFINE_PROP_BOOL("x-epmp", RISCVCPU, cfg.epmp, false),
> +    DEFINE_PROP_BOOL("x-aia", RISCVCPU, cfg.aia, false),
>
>      DEFINE_PROP_UINT64("resetvec", RISCVCPU, cfg.resetvec, DEFAULT_RSTVEC),
>      DEFINE_PROP_END_OF_LIST(),
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index 16a4596433..cab9e90153 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -337,6 +337,7 @@ struct RISCVCPU {
>          bool mmu;
>          bool pmp;
>          bool epmp;
> +        bool aia;
>          uint64_t resetvec;
>      } cfg;
>  };
> --
> 2.25.1
>
>