Re: [PATCH v3 11/16] target/riscv: move 'cbom_blocksize' to riscv_cpu_properties[]

[Alistair Francis <alistair23@gmail.com>]

On Thu, Jan 4, 2024 at 3:44 AM Daniel Henrique Barboza
<dbarboza@ventanamicro.com> wrote:
>
> After adding a KVM finalize() implementation, turn cbom_blocksize into a
> class property. Follow the same design we used with 'vlen' and 'elen'.
>
> The duplicated 'cbom_blocksize' KVM property can be removed from
> kvm_riscv_add_cpu_user_properties().
>
> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>

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

Alistair

> ---
>  target/riscv/cpu.c         | 39 +++++++++++++++++++++++++++++++++++++-
>  target/riscv/kvm/kvm-cpu.c |  4 ----
>  2 files changed, 38 insertions(+), 5 deletions(-)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index 92b4881e9c..b510cb94fc 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -1276,6 +1276,7 @@ static void riscv_cpu_init(Object *obj)
>      cpu->cfg.pmu_mask = MAKE_64BIT_MASK(3, 16);
>      cpu->cfg.vlen = 128;
>      cpu->cfg.elen = 64;
> +    cpu->cfg.cbom_blocksize = 64;
>      cpu->env.vext_ver = VEXT_VERSION_1_00_0;
>  }
>
> @@ -1822,8 +1823,42 @@ static const PropertyInfo prop_elen = {
>      .set = prop_elen_set,
>  };
>
> +static void prop_cbom_blksize_set(Object *obj, Visitor *v, const char *name,
> +                                  void *opaque, Error **errp)
> +{
> +    RISCVCPU *cpu = RISCV_CPU(obj);
> +    uint16_t value;
> +
> +    if (!visit_type_uint16(v, name, &value, errp)) {
> +        return;
> +    }
> +
> +    if (value != cpu->cfg.cbom_blocksize && riscv_cpu_is_vendor(obj)) {
> +        cpu_set_prop_err(cpu, name, errp);
> +        error_append_hint(errp, "Current '%s' val: %u\n",
> +                          name, cpu->cfg.cbom_blocksize);
> +        return;
> +    }
> +
> +    cpu_option_add_user_setting(name, value);
> +    cpu->cfg.cbom_blocksize = value;
> +}
> +
> +static void prop_cbom_blksize_get(Object *obj, Visitor *v, const char *name,
> +                         void *opaque, Error **errp)
> +{
> +    uint16_t value = RISCV_CPU(obj)->cfg.cbom_blocksize;
> +
> +    visit_type_uint16(v, name, &value, errp);
> +}
> +
> +static const PropertyInfo prop_cbom_blksize = {
> +    .name = "cbom_blocksize",
> +    .get = prop_cbom_blksize_get,
> +    .set = prop_cbom_blksize_set,
> +};
> +
>  Property riscv_cpu_options[] = {
> -    DEFINE_PROP_UINT16("cbom_blocksize", RISCVCPU, cfg.cbom_blocksize, 64),
>      DEFINE_PROP_UINT16("cboz_blocksize", RISCVCPU, cfg.cboz_blocksize, 64),
>
>      DEFINE_PROP_END_OF_LIST(),
> @@ -1844,6 +1879,8 @@ static Property riscv_cpu_properties[] = {
>      {.name = "vlen", .info = &prop_vlen},
>      {.name = "elen", .info = &prop_elen},
>
> +    {.name = "cbom_blocksize", .info = &prop_cbom_blksize},
> +
>  #ifndef CONFIG_USER_ONLY
>      DEFINE_PROP_UINT64("resetvec", RISCVCPU, env.resetvec, DEFAULT_RSTVEC),
>  #endif
> diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
> index 70fb075846..1866b56913 100644
> --- a/target/riscv/kvm/kvm-cpu.c
> +++ b/target/riscv/kvm/kvm-cpu.c
> @@ -484,10 +484,6 @@ static void kvm_riscv_add_cpu_user_properties(Object *cpu_obj)
>                              NULL, multi_cfg);
>      }
>
> -    object_property_add(cpu_obj, "cbom_blocksize", "uint16",
> -                        NULL, kvm_cpu_set_cbomz_blksize,
> -                        NULL, &kvm_cbom_blocksize);
> -
>      object_property_add(cpu_obj, "cboz_blocksize", "uint16",
>                          NULL, kvm_cpu_set_cbomz_blksize,
>                          NULL, &kvm_cboz_blocksize);
> --
> 2.43.0
>
>