Re: [PATCH v3 5/7] target/ppc: removed VSCR from SPR registration

[David Gibson]

On Fri, Apr 30, 2021 at 04:35:31PM -0300, Bruno Larsen (billionai) wrote:
> Since vscr is not an spr, its initialization was removed from the
> spr registration functions, and moved to the relevant init_procs.
> 
> We may look into adding vscr to the reset path instead of the init
> path (as suggested by David Gibson), but this looked like a good
> enough solution for now.
> 
> Signed-off-by: Bruno Larsen (billionai)
> <bruno.larsen@eldorado.org.br>

Applied to ppc-for-6.1, thanks.

> ---
>  target/ppc/translate_init.c.inc | 20 +++++++++++++-------
>  1 file changed, 13 insertions(+), 7 deletions(-)
> 
> diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc
> index 67529e8648..b922b04f25 100644
> --- a/target/ppc/translate_init.c.inc
> +++ b/target/ppc/translate_init.c.inc
> @@ -941,8 +941,6 @@ static void gen_spr_74xx(CPUPPCState *env)
>                   SPR_NOACCESS, SPR_NOACCESS,
>                   &spr_read_generic, spr_access_nop,
>                   0x00000000);
> -    /* Not strictly an SPR */
> -    vscr_init(env, 0x00010000);
>  }
>  
>  static void gen_l3_ctrl(CPUPPCState *env)
> @@ -5790,6 +5788,7 @@ static void init_proc_7400(CPUPPCState *env)
>      gen_tbl(env);
>      /* 74xx specific SPR */
>      gen_spr_74xx(env);
> +    vscr_init(env, 0x00010000);
>      /* XXX : not implemented */
>      spr_register(env, SPR_UBAMR, "UBAMR",
>                   &spr_read_ureg, SPR_NOACCESS,
> @@ -5869,6 +5868,7 @@ static void init_proc_7410(CPUPPCState *env)
>      gen_tbl(env);
>      /* 74xx specific SPR */
>      gen_spr_74xx(env);
> +    vscr_init(env, 0x00010000);
>      /* XXX : not implemented */
>      spr_register(env, SPR_UBAMR, "UBAMR",
>                   &spr_read_ureg, SPR_NOACCESS,
> @@ -5954,6 +5954,7 @@ static void init_proc_7440(CPUPPCState *env)
>      gen_tbl(env);
>      /* 74xx specific SPR */
>      gen_spr_74xx(env);
> +    vscr_init(env, 0x00010000);
>      /* XXX : not implemented */
>      spr_register(env, SPR_UBAMR, "UBAMR",
>                   &spr_read_ureg, SPR_NOACCESS,
> @@ -6062,6 +6063,7 @@ static void init_proc_7450(CPUPPCState *env)
>      gen_tbl(env);
>      /* 74xx specific SPR */
>      gen_spr_74xx(env);
> +    vscr_init(env, 0x00010000);
>      /* Level 3 cache control */
>      gen_l3_ctrl(env);
>      /* L3ITCR1 */
> @@ -6196,6 +6198,7 @@ static void init_proc_7445(CPUPPCState *env)
>      gen_tbl(env);
>      /* 74xx specific SPR */
>      gen_spr_74xx(env);
> +    vscr_init(env, 0x00010000);
>      /* LDSTCR */
>      /* XXX : not implemented */
>      spr_register(env, SPR_LDSTCR, "LDSTCR",
> @@ -6333,6 +6336,7 @@ static void init_proc_7455(CPUPPCState *env)
>      gen_tbl(env);
>      /* 74xx specific SPR */
>      gen_spr_74xx(env);
> +    vscr_init(env, 0x00010000);
>      /* Level 3 cache control */
>      gen_l3_ctrl(env);
>      /* LDSTCR */
> @@ -6472,6 +6476,7 @@ static void init_proc_7457(CPUPPCState *env)
>      gen_tbl(env);
>      /* 74xx specific SPR */
>      gen_spr_74xx(env);
> +    vscr_init(env, 0x00010000);
>      /* Level 3 cache control */
>      gen_l3_ctrl(env);
>      /* L3ITCR1 */
> @@ -6635,6 +6640,7 @@ static void init_proc_e600(CPUPPCState *env)
>      gen_tbl(env);
>      /* 74xx specific SPR */
>      gen_spr_74xx(env);
> +    vscr_init(env, 0x00010000);
>      /* XXX : not implemented */
>      spr_register(env, SPR_UBAMR, "UBAMR",
>                   &spr_read_ureg, SPR_NOACCESS,
> @@ -6833,11 +6839,6 @@ static void gen_spr_book3s_altivec(CPUPPCState *env)
>                       &spr_read_generic, &spr_write_generic,
>                       KVM_REG_PPC_VRSAVE, 0x00000000);
>  
> -    /*
> -     * Can't find information on what this should be on reset.  This
> -     * value is the one used by 74xx processors.
> -     */
> -    vscr_init(env, 0x00010000);
>  }
>  
>  static void gen_spr_book3s_dbg(CPUPPCState *env)
> @@ -7457,6 +7458,11 @@ static void init_proc_book3s_common(CPUPPCState *env)
>      gen_spr_book3s_pmu_sup(env);
>      gen_spr_book3s_pmu_user(env);
>      gen_spr_book3s_ctrl(env);
> +    /*
> +     * Can't find information on what this should be on reset.  This
> +     * value is the one used by 74xx processors.
> +     */
> +    vscr_init(env, 0x00010000);
>  }
>  
>  static void init_proc_970(CPUPPCState *env)

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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