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Re: [PATCH v2] target/riscv: Add Tenstorrent Ascalon CPU


From: Alistair Francis
Subject: Re: [PATCH v2] target/riscv: Add Tenstorrent Ascalon CPU
Date: Tue, 19 Nov 2024 13:14:57 +1000

On Wed, Nov 13, 2024 at 9:06 PM Anton Blanchard <antonb@tenstorrent.com> wrote:
>
> Add a CPU entry for the Tenstorrent Ascalon CPU, a series of 2 wide to
> 8 wide RV64 cores. More details can be found at
> https://tenstorrent.com/ip/tt-ascalon
>
> Signed-off-by: Anton Blanchard <antonb@tenstorrent.com>

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

Alistair

> ---
>  target/riscv/cpu-qom.h |  1 +
>  target/riscv/cpu.c     | 67 ++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 68 insertions(+)
>
> diff --git a/target/riscv/cpu-qom.h b/target/riscv/cpu-qom.h
> index 62115375cd..6547642287 100644
> --- a/target/riscv/cpu-qom.h
> +++ b/target/riscv/cpu-qom.h
> @@ -49,6 +49,7 @@
>  #define TYPE_RISCV_CPU_SIFIVE_U54       RISCV_CPU_TYPE_NAME("sifive-u54")
>  #define TYPE_RISCV_CPU_THEAD_C906       RISCV_CPU_TYPE_NAME("thead-c906")
>  #define TYPE_RISCV_CPU_VEYRON_V1        RISCV_CPU_TYPE_NAME("veyron-v1")
> +#define TYPE_RISCV_CPU_TT_ASCALON       RISCV_CPU_TYPE_NAME("tt-ascalon")
>  #define TYPE_RISCV_CPU_HOST             RISCV_CPU_TYPE_NAME("host")
>
>  OBJECT_DECLARE_CPU_TYPE(RISCVCPU, RISCVCPUClass, RISCV_CPU)
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index f219f0c3b5..8447ad0dfb 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -579,6 +579,72 @@ static void rv64_veyron_v1_cpu_init(Object *obj)
>  #endif
>  }
>
> +/* Tenstorrent Ascalon */
> +static void rv64_tt_ascalon_cpu_init(Object *obj)
> +{
> +    CPURISCVState *env = &RISCV_CPU(obj)->env;
> +    RISCVCPU *cpu = RISCV_CPU(obj);
> +
> +    riscv_cpu_set_misa_ext(env, RVG | RVC | RVS | RVU | RVH | RVV);
> +    env->priv_ver = PRIV_VERSION_1_13_0;
> +
> +    /* Enable ISA extensions */
> +    cpu->cfg.mmu = true;
> +    cpu->cfg.vlenb = 256 >> 3;
> +    cpu->cfg.elen = 64;
> +    cpu->env.vext_ver = VEXT_VERSION_1_00_0;
> +    cpu->cfg.rvv_ma_all_1s = true;
> +    cpu->cfg.rvv_ta_all_1s = true;
> +    cpu->cfg.misa_w = true;
> +    cpu->cfg.pmp = true;
> +    cpu->cfg.cbom_blocksize = 64;
> +    cpu->cfg.cbop_blocksize = 64;
> +    cpu->cfg.cboz_blocksize = 64;
> +    cpu->cfg.ext_zic64b = true;
> +    cpu->cfg.ext_zicbom = true;
> +    cpu->cfg.ext_zicbop = true;
> +    cpu->cfg.ext_zicboz = true;
> +    cpu->cfg.ext_zicntr = true;
> +    cpu->cfg.ext_zicond = true;
> +    cpu->cfg.ext_zicsr = true;
> +    cpu->cfg.ext_zifencei = true;
> +    cpu->cfg.ext_zihintntl = true;
> +    cpu->cfg.ext_zihintpause = true;
> +    cpu->cfg.ext_zihpm = true;
> +    cpu->cfg.ext_zimop = true;
> +    cpu->cfg.ext_zawrs = true;
> +    cpu->cfg.ext_zfa = true;
> +    cpu->cfg.ext_zfbfmin = true;
> +    cpu->cfg.ext_zfh = true;
> +    cpu->cfg.ext_zfhmin = true;
> +    cpu->cfg.ext_zcb = true;
> +    cpu->cfg.ext_zcmop = true;
> +    cpu->cfg.ext_zba = true;
> +    cpu->cfg.ext_zbb = true;
> +    cpu->cfg.ext_zbs = true;
> +    cpu->cfg.ext_zkt = true;
> +    cpu->cfg.ext_zvbb = true;
> +    cpu->cfg.ext_zvbc = true;
> +    cpu->cfg.ext_zvfbfmin = true;
> +    cpu->cfg.ext_zvfbfwma = true;
> +    cpu->cfg.ext_zvfh = true;
> +    cpu->cfg.ext_zvfhmin = true;
> +    cpu->cfg.ext_zvkng = true;
> +    cpu->cfg.ext_smaia = true;
> +    cpu->cfg.ext_smstateen = true;
> +    cpu->cfg.ext_ssaia = true;
> +    cpu->cfg.ext_sscofpmf = true;
> +    cpu->cfg.ext_sstc = true;
> +    cpu->cfg.ext_svade = true;
> +    cpu->cfg.ext_svinval = true;
> +    cpu->cfg.ext_svnapot = true;
> +    cpu->cfg.ext_svpbmt = true;
> +
> +#ifndef CONFIG_USER_ONLY
> +    set_satp_mode_max_supported(cpu, VM_1_10_SV57);
> +#endif
> +}
> +
>  #ifdef CONFIG_TCG
>  static void rv128_base_cpu_init(Object *obj)
>  {
> @@ -2982,6 +3048,7 @@ static const TypeInfo riscv_cpu_type_infos[] = {
>      DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_SIFIVE_U54, MXL_RV64,  
> rv64_sifive_u_cpu_init),
>      DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_SHAKTI_C,   MXL_RV64,  
> rv64_sifive_u_cpu_init),
>      DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_THEAD_C906, MXL_RV64,  
> rv64_thead_c906_cpu_init),
> +    DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_TT_ASCALON, MXL_RV64,  
> rv64_tt_ascalon_cpu_init),
>      DEFINE_VENDOR_CPU(TYPE_RISCV_CPU_VEYRON_V1,  MXL_RV64,  
> rv64_veyron_v1_cpu_init),
>  #ifdef CONFIG_TCG
>      DEFINE_DYNAMIC_CPU(TYPE_RISCV_CPU_BASE128,   MXL_RV128, 
> rv128_base_cpu_init),
> --
> 2.34.1
>
>



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