[06/77] ppc: Add macros to register hypervisor mode SPRs

The current set of spr_register_* macros only take the user and
supervisor function pointers. To make the transition easy, we
don't change that but we add "_hv" variants that can be used to
register all 3 sets.

To simplify the transition, users of the "old" macro will set the
hypervisor callback to be the same as the supervisor one. The new
registration function only needs to be used for registers that are
either hypervisor only or behave differently in HV mode.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 target-ppc/translate.c      | 26 ++++++++++++++++----------
 target-ppc/translate_init.c | 35 +++++++++++++++++++++++++++++++----
 2 files changed, 47 insertions(+), 14 deletions(-)

On Wed, Nov 11, 2015 at 11:27:19AM +1100, Benjamin Herrenschmidt wrote:
> The current set of spr_register_* macros only take the user and
> supervisor function pointers. To make the transition easy, we
> don't change that but we add "_hv" variants that can be used to
> register all 3 sets.
> 
> To simplify the transition, users of the "old" macro will set the
> hypervisor callback to be the same as the supervisor one. The new
> registration function only needs to be used for registers that are
> either hypervisor only or behave differently in HV mode.
> 
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

> ---
>  target-ppc/translate.c      | 26 ++++++++++++++++----------
>  target-ppc/translate_init.c | 35 +++++++++++++++++++++++++++++++----
>  2 files changed, 47 insertions(+), 14 deletions(-)
> 
> diff --git a/target-ppc/translate.c b/target-ppc/translate.c
> index e18d204..a2fe1b5 100644
> --- a/target-ppc/translate.c
> +++ b/target-ppc/translate.c
> @@ -4299,14 +4299,17 @@ static inline void gen_op_mfspr(DisasContext *ctx)
>      void (*read_cb)(DisasContext *ctx, int gprn, int sprn);
>      uint32_t sprn = SPR(ctx->opcode);
>  
> -#if !defined(CONFIG_USER_ONLY)
> -    if (ctx->hv)
> +#if defined(CONFIG_USER_ONLY)
> +    read_cb = ctx->spr_cb[sprn].uea_read;
> +#else
> +    if (ctx->pr) {
> +        read_cb = ctx->spr_cb[sprn].uea_read;
> +    } else if (ctx->hv) {
>          read_cb = ctx->spr_cb[sprn].hea_read;
> -    else if (!ctx->pr)
> +    } else if (!ctx->pr) {
>          read_cb = ctx->spr_cb[sprn].oea_read;
> -    else
> +    }
>  #endif
> -        read_cb = ctx->spr_cb[sprn].uea_read;
>      if (likely(read_cb != NULL)) {
>          if (likely(read_cb != SPR_NOACCESS)) {
>              (*read_cb)(ctx, rD(ctx->opcode), sprn);
> @@ -4450,14 +4453,17 @@ static void gen_mtspr(DisasContext *ctx)
>      void (*write_cb)(DisasContext *ctx, int sprn, int gprn);
>      uint32_t sprn = SPR(ctx->opcode);
>  
> -#if !defined(CONFIG_USER_ONLY)
> -    if (ctx->hv)
> +#if defined(CONFIG_USER_ONLY)
> +    write_cb = ctx->spr_cb[sprn].uea_write;
> +#else
> +    if (ctx->pr) {
> +        write_cb = ctx->spr_cb[sprn].uea_write;
> +    } else if (ctx->hv) {
>          write_cb = ctx->spr_cb[sprn].hea_write;
> -    else if (!ctx->pr)
> +    } else {
>          write_cb = ctx->spr_cb[sprn].oea_write;
> -    else
> +    }
>  #endif
> -        write_cb = ctx->spr_cb[sprn].uea_write;
>      if (likely(write_cb != NULL)) {
>          if (likely(write_cb != SPR_NOACCESS)) {
>              (*write_cb)(ctx, sprn, rS(ctx->opcode));
> diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
> index e88dc7f..30a03ce 100644
> --- a/target-ppc/translate_init.c
> +++ b/target-ppc/translate_init.c
> @@ -578,17 +578,33 @@ static inline void vscr_init (CPUPPCState *env, uint32_t val)
>  #define spr_register_kvm(env, num, name, uea_read, uea_write,                  \
>                           oea_read, oea_write, one_reg_id, initial_value)       \
>      _spr_register(env, num, name, uea_read, uea_write, initial_value)
> +#define spr_register_kvm_hv(env, num, name, uea_read, uea_write,               \
> +                            oea_read, oea_write, hea_read, hea_write,          \
> +                            one_reg_id, initial_value)                         \
> +    _spr_register(env, num, name, uea_read, uea_write, initial_value)
>  #else
>  #if !defined(CONFIG_KVM)
>  #define spr_register_kvm(env, num, name, uea_read, uea_write,                  \
> -                         oea_read, oea_write, one_reg_id, initial_value) \
> +                         oea_read, oea_write, one_reg_id, initial_value)       \
> +    _spr_register(env, num, name, uea_read, uea_write,                         \
> +                  oea_read, oea_write, oea_read, oea_write, initial_value)
> +#define spr_register_kvm_hv(env, num, name, uea_read, uea_write,               \
> +                            oea_read, oea_write, hea_read, hea_write,          \
> +                            one_reg_id, initial_value)                         \
>      _spr_register(env, num, name, uea_read, uea_write,                         \
> -                  oea_read, oea_write, initial_value)
> +                  oea_read, oea_write, hea_read, hea_write, initial_value)
>  #else
>  #define spr_register_kvm(env, num, name, uea_read, uea_write,                  \
> -                         oea_read, oea_write, one_reg_id, initial_value) \
> +                         oea_read, oea_write, one_reg_id, initial_value)       \
> +    _spr_register(env, num, name, uea_read, uea_write,                         \
> +                  oea_read, oea_write, oea_read, oea_write,                    \
> +                  one_reg_id, initial_value)
> +#define spr_register_kvm_hv(env, num, name, uea_read, uea_write,               \
> +                            oea_read, oea_write, hea_read, hea_write,          \
> +                            one_reg_id, initial_value)                         \
>      _spr_register(env, num, name, uea_read, uea_write,                         \
> -                  oea_read, oea_write, one_reg_id, initial_value)
> +                  oea_read, oea_write, hea_read, hea_write,                    \
> +                  one_reg_id, initial_value)
>  #endif
>  #endif
>  
> @@ -597,6 +613,13 @@ static inline void vscr_init (CPUPPCState *env, uint32_t val)
>      spr_register_kvm(env, num, name, uea_read, uea_write,                      \
>                       oea_read, oea_write, 0, initial_value)
>  
> +#define spr_register_hv(env, num, name, uea_read, uea_write,                   \
> +                        oea_read, oea_write, hea_read, hea_write,              \
> +                        initial_value)                                         \
> +    spr_register_kvm_hv(env, num, name, uea_read, uea_write,                   \
> +                        oea_read, oea_write, hea_read, hea_write,              \
> +                        0, initial_value)
> +
>  static inline void _spr_register(CPUPPCState *env, int num,
>                                   const char *name,
>                                   void (*uea_read)(DisasContext *ctx, int gprn, int sprn),
> @@ -605,6 +628,8 @@ static inline void _spr_register(CPUPPCState *env, int num,
>  
>                                   void (*oea_read)(DisasContext *ctx, int gprn, int sprn),
>                                   void (*oea_write)(DisasContext *ctx, int sprn, int gprn),
> +                                 void (*hea_read)(DisasContext *opaque, int gprn, int sprn),
> +                                 void (*hea_write)(DisasContext *opaque, int sprn, int gprn),
>  #endif
>  #if defined(CONFIG_KVM)
>                                   uint64_t one_reg_id,
> @@ -632,6 +657,8 @@ static inline void _spr_register(CPUPPCState *env, int num,
>  #if !defined(CONFIG_USER_ONLY)
>      spr->oea_read = oea_read;
>      spr->oea_write = oea_write;
> +    spr->hea_read = hea_read;
> +    spr->hea_write = hea_write;
>  #endif
>  #if defined(CONFIG_KVM)
>      spr->one_reg_id = one_reg_id,