From: Richard Henderson <richard.henderson@linaro.org>
Date: Wed, 8 Oct 2025 21:55:25 +0000 (-0700)
Subject: target/arm: Convert arm_mmu_idx_is_stage1_of_2 from switch to table
X-Git-Tag: v10.2.0-rc1~67^2~51
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=346feee01c87713230e5f3da7b1126da1b43027f;p=thirdparty%2Fqemu.git

target/arm: Convert arm_mmu_idx_is_stage1_of_2 from switch to table

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-26-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---

diff --git a/target/arm/internals.h b/target/arm/internals.h
index c4aef8b50e..92883b6c0e 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1285,25 +1285,6 @@ ARMMMUIdx stage_1_mmu_idx(ARMMMUIdx mmu_idx);
 ARMMMUIdx arm_stage1_mmu_idx(CPUARMState *env);
 #endif
 
-/**
- * arm_mmu_idx_is_stage1_of_2:
- * @mmu_idx: The ARMMMUIdx to test
- *
- * Return true if @mmu_idx is a NOTLB mmu_idx that is the
- * first stage of a two stage regime.
- */
-static inline bool arm_mmu_idx_is_stage1_of_2(ARMMMUIdx mmu_idx)
-{
-    switch (mmu_idx) {
-    case ARMMMUIdx_Stage1_E0:
-    case ARMMMUIdx_Stage1_E1:
-    case ARMMMUIdx_Stage1_E1_PAN:
-        return true;
-    default:
-        return false;
-    }
-}
-
 static inline uint32_t aarch32_cpsr_valid_mask(uint64_t features,
                                                const ARMISARegisters *id)
 {
diff --git a/target/arm/mmuidx-internal.h b/target/arm/mmuidx-internal.h
index 3e51c0f579..55fba4aae2 100644
--- a/target/arm/mmuidx-internal.h
+++ b/target/arm/mmuidx-internal.h
@@ -18,6 +18,7 @@ FIELD(MMUIDXINFO, RELVALID, 5, 1)
 FIELD(MMUIDXINFO, 2RANGES, 6, 1)
 FIELD(MMUIDXINFO, PAN, 7, 1)
 FIELD(MMUIDXINFO, USER, 8, 1)
+FIELD(MMUIDXINFO, STAGE1, 9, 1)
 
 extern const uint32_t arm_mmuidx_table[ARM_MMU_IDX_M + 8];
 
@@ -76,4 +77,11 @@ static inline bool regime_is_user(ARMMMUIdx idx)
     return FIELD_EX32(arm_mmuidx_table[idx], MMUIDXINFO, USER);
 }
 
+/* Return true if this mmu index is stage 1 of a 2-stage translation. */
+static inline bool arm_mmu_idx_is_stage1_of_2(ARMMMUIdx idx)
+{
+    tcg_debug_assert(arm_mmuidx_is_valid(idx));
+    return FIELD_EX32(arm_mmuidx_table[idx], MMUIDXINFO, STAGE1);
+}
+
 #endif /* TARGET_ARM_MMUIDX_INTERNAL_H */
diff --git a/target/arm/mmuidx.c b/target/arm/mmuidx.c
index 1c1e062bfe..c5b43a5932 100644
--- a/target/arm/mmuidx.c
+++ b/target/arm/mmuidx.c
@@ -13,6 +13,7 @@
 #define R2     R_MMUIDXINFO_2RANGES_MASK
 #define PAN    R_MMUIDXINFO_PAN_MASK
 #define USER   R_MMUIDXINFO_USER_MASK
+#define S1     R_MMUIDXINFO_STAGE1_MASK
 
 const uint32_t arm_mmuidx_table[ARM_MMU_IDX_M + 8] = {
     /*
@@ -35,9 +36,9 @@ const uint32_t arm_mmuidx_table[ARM_MMU_IDX_M + 8] = {
     [ARMMMUIdx_Stage2_S]        = REL(2),
     [ARMMMUIdx_Stage2]          = REL(2),
 
-    [ARMMMUIdx_Stage1_E0]       = REL(1) | R2 | USER,
-    [ARMMMUIdx_Stage1_E1]       = REL(1) | R2,
-    [ARMMMUIdx_Stage1_E1_PAN]   = REL(1) | R2 | PAN,
+    [ARMMMUIdx_Stage1_E0]       = REL(1) | R2 | S1 | USER,
+    [ARMMMUIdx_Stage1_E1]       = REL(1) | R2 | S1,
+    [ARMMMUIdx_Stage1_E1_PAN]   = REL(1) | R2 | S1 | PAN,
 
     /*
      * M-profile.