Re: [Qemu-devel] [PATCH v5 20/30] target-ppc: Add POWER8's TIR SPR

[Tom Musta <tommusta@gmail.com>]

On 6/4/2014 7:50 AM, Alexey Kardashevskiy wrote:
> This adds TIR (Thread Identification Register) SPR first defined for server
> CPUs in PowerISA 2.07.
> 
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> ---
> Changes:
> v5:
> * TIR is defined for servers from 2.07 so it is power8 only
> 
> v4:
> * disabled reading it from user space
> ---
>  target-ppc/cpu.h            |  1 +
>  target-ppc/translate_init.c | 10 ++++++++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
> index 8955f29..3a578e6 100644
> --- a/target-ppc/cpu.h
> +++ b/target-ppc/cpu.h
> @@ -1374,6 +1374,7 @@ static inline int cpu_mmu_index (CPUPPCState *env)
>  #define SPR_BOOKE_GIVOR8      (0x1BB)
>  #define SPR_BOOKE_GIVOR13     (0x1BC)
>  #define SPR_BOOKE_GIVOR14     (0x1BD)
> +#define SPR_TIR               (0x1BE)
>  #define SPR_BOOKE_SPEFSCR     (0x200)
>  #define SPR_Exxx_BBEAR        (0x201)
>  #define SPR_Exxx_BBTAR        (0x202)
> diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
> index 7eb02ac..1df69e0 100644
> --- a/target-ppc/translate_init.c
> +++ b/target-ppc/translate_init.c
> @@ -7518,6 +7518,15 @@ static void gen_spr_book3s_ids(CPUPPCState *env)
>                   0x00000000);
>  }
>  
> +static void gen_spr_power8_ids(CPUPPCState *env)
> +{
> +    /* Thread identification */
> +    spr_register(env, SPR_TIR, "TIR",
> +                 SPR_NOACCESS, SPR_NOACCESS,
> +                 &spr_read_generic, SPR_NOACCESS,
> +                 0x00000000);
> +}
> +
>  static void gen_spr_book3s_purr(CPUPPCState *env)
>  {
>  #if !defined(CONFIG_USER_ONLY)
> @@ -7621,6 +7630,7 @@ static void init_proc_book3s_64(CPUPPCState *env, int version)
>      }
>      if (version >= BOOK3S_CPU_POWER8) {
>          gen_spr_power8_tce_address_control(env);
> +        gen_spr_power8_ids(env);
>      }
>  #if !defined(CONFIG_USER_ONLY)
>      switch (version) {
> 
Reviewed-by: Tom Musta <tommusta@gmail.com>