Re: [Qemu-devel] [PATCH v5 13/17] target/arm: Split out arm_mmu_idx_el

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 8/20/19 11:07 PM, Richard Henderson wrote:
> Avoid calling arm_current_el() twice.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> ---
>  target/arm/internals.h |  9 +++++++++
>  target/arm/helper.c    | 12 +++++++-----
>  2 files changed, 16 insertions(+), 5 deletions(-)
> 
> diff --git a/target/arm/internals.h b/target/arm/internals.h
> index 232d963875..f5313dd3d4 100644
> --- a/target/arm/internals.h
> +++ b/target/arm/internals.h
> @@ -949,6 +949,15 @@ void arm_cpu_update_virq(ARMCPU *cpu);
>   */
>  void arm_cpu_update_vfiq(ARMCPU *cpu);
>  
> +/**
> + * arm_mmu_idx_el:
> + * @env: The cpu environment
> + * @el: The EL to use.
> + *
> + * Return the full ARMMMUIdx for the translation regime for EL.
> + */
> +ARMMMUIdx arm_mmu_idx_el(CPUARMState *env, int el);
> +
>  /**
>   * arm_mmu_idx:
>   * @env: The cpu environment
> diff --git a/target/arm/helper.c b/target/arm/helper.c
> index 83ae33dae5..19bdb9b9d6 100644
> --- a/target/arm/helper.c
> +++ b/target/arm/helper.c
> @@ -10988,15 +10988,12 @@ ARMMMUIdx arm_v7m_mmu_idx_for_secstate(CPUARMState *env, bool secstate)
>  }
>  #endif
>  
> -ARMMMUIdx arm_mmu_idx(CPUARMState *env)
> +ARMMMUIdx arm_mmu_idx_el(CPUARMState *env, int el)
>  {
> -    int el;
> -
>      if (arm_feature(env, ARM_FEATURE_M)) {
>          return arm_v7m_mmu_idx_for_secstate(env, env->v7m.secure);
>      }
>  
> -    el = arm_current_el(env);
>      if (el < 2 && arm_is_secure_below_el3(env)) {
>          return ARMMMUIdx_S1SE0 + el;
>      } else {
> @@ -11004,6 +11001,11 @@ ARMMMUIdx arm_mmu_idx(CPUARMState *env)
>      }
>  }
>  
> +ARMMMUIdx arm_mmu_idx(CPUARMState *env)
> +{
> +    return arm_mmu_idx_el(env, arm_current_el(env));
> +}
> +
>  int cpu_mmu_index(CPUARMState *env, bool ifetch)
>  {
>      return arm_to_core_mmu_idx(arm_mmu_idx(env));
> @@ -11164,7 +11166,7 @@ static uint32_t rebuild_hflags_internal(CPUARMState *env)
>  {
>      int el = arm_current_el(env);
>      int fp_el = fp_exception_el(env, el);
> -    ARMMMUIdx mmu_idx = arm_mmu_idx(env);
> +    ARMMMUIdx mmu_idx = arm_mmu_idx_el(env, el);
>  
>      if (is_a64(env)) {
>          return rebuild_hflags_a64(env, el, fp_el, mmu_idx);
>