target/arm: Optimize cpu_mmu_index
We now cache the core mmu_idx in env->hflags. Rather than recompute from scratch, extract the field. All of the uses of cpu_mmu_index within target/arm are within helpers, and env->hflags is always stable within a translation block from whence helpers are called. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20200302175829.2183-3-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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@ -2943,16 +2943,6 @@ typedef enum ARMMMUIdxBit {
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#define MMU_USER_IDX 0
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#define MMU_USER_IDX 0
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/**
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* cpu_mmu_index:
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* @env: The cpu environment
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* @ifetch: True for code access, false for data access.
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*
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* Return the core mmu index for the current translation regime.
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* This function is used by generic TCG code paths.
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*/
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int cpu_mmu_index(CPUARMState *env, bool ifetch);
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/* Indexes used when registering address spaces with cpu_address_space_init */
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/* Indexes used when registering address spaces with cpu_address_space_init */
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typedef enum ARMASIdx {
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typedef enum ARMASIdx {
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ARMASIdx_NS = 0,
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ARMASIdx_NS = 0,
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@ -3232,6 +3222,19 @@ FIELD(TBFLAG_A64, BTYPE, 10, 2) /* Not cached. */
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FIELD(TBFLAG_A64, TBID, 12, 2)
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FIELD(TBFLAG_A64, TBID, 12, 2)
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FIELD(TBFLAG_A64, UNPRIV, 14, 1)
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FIELD(TBFLAG_A64, UNPRIV, 14, 1)
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/**
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* cpu_mmu_index:
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* @env: The cpu environment
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* @ifetch: True for code access, false for data access.
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*
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* Return the core mmu index for the current translation regime.
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* This function is used by generic TCG code paths.
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*/
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static inline int cpu_mmu_index(CPUARMState *env, bool ifetch)
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{
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return FIELD_EX32(env->hflags, TBFLAG_ANY, MMUIDX);
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}
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static inline bool bswap_code(bool sctlr_b)
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static inline bool bswap_code(bool sctlr_b)
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{
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{
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#ifdef CONFIG_USER_ONLY
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#ifdef CONFIG_USER_ONLY
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@ -12274,11 +12274,6 @@ ARMMMUIdx arm_mmu_idx(CPUARMState *env)
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return arm_mmu_idx_el(env, arm_current_el(env));
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return arm_mmu_idx_el(env, arm_current_el(env));
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}
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}
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int cpu_mmu_index(CPUARMState *env, bool ifetch)
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{
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return arm_to_core_mmu_idx(arm_mmu_idx(env));
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}
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#ifndef CONFIG_USER_ONLY
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#ifndef CONFIG_USER_ONLY
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ARMMMUIdx arm_stage1_mmu_idx(CPUARMState *env)
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ARMMMUIdx arm_stage1_mmu_idx(CPUARMState *env)
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{
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{
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