[PULL 15/28] target/arm: Reorg regime_translation_disabled

[Peter Maydell <peter.maydell@linaro.org>]

From: Richard Henderson <richard.henderson@linaro.org>

Use a switch on mmu_idx for the a-profile indexes, instead of
three different if's vs regime_el and arm_mmu_idx_is_stage1_of_2.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20221001162318.153420-12-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/ptw.c | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/target/arm/ptw.c b/target/arm/ptw.c
index 2055d684e63..a514a78c924 100644
--- a/target/arm/ptw.c
+++ b/target/arm/ptw.c
@@ -148,21 +148,39 @@ static bool regime_translation_disabled(CPUARMState *env, ARMMMUIdx mmu_idx,
 
     hcr_el2 = arm_hcr_el2_eff(env);
 
-    if (mmu_idx == ARMMMUIdx_Stage2 || mmu_idx == ARMMMUIdx_Stage2_S) {
+    switch (mmu_idx) {
+    case ARMMMUIdx_Stage2:
+    case ARMMMUIdx_Stage2_S:
         /* HCR.DC means HCR.VM behaves as 1 */
         return (hcr_el2 & (HCR_DC | HCR_VM)) == 0;
-    }
 
-    if (hcr_el2 & HCR_TGE) {
+    case ARMMMUIdx_E10_0:
+    case ARMMMUIdx_E10_1:
+    case ARMMMUIdx_E10_1_PAN:
         /* TGE means that NS EL0/1 act as if SCTLR_EL1.M is zero */
-        if (!is_secure && regime_el(env, mmu_idx) == 1) {
+        if (!is_secure && (hcr_el2 & HCR_TGE)) {
             return true;
         }
-    }
+        break;
 
-    if ((hcr_el2 & HCR_DC) && arm_mmu_idx_is_stage1_of_2(mmu_idx)) {
+    case ARMMMUIdx_Stage1_E0:
+    case ARMMMUIdx_Stage1_E1:
+    case ARMMMUIdx_Stage1_E1_PAN:
         /* HCR.DC means SCTLR_EL1.M behaves as 0 */
-        return true;
+        if (hcr_el2 & HCR_DC) {
+            return true;
+        }
+        break;
+
+    case ARMMMUIdx_E20_0:
+    case ARMMMUIdx_E20_2:
+    case ARMMMUIdx_E20_2_PAN:
+    case ARMMMUIdx_E2:
+    case ARMMMUIdx_E3:
+        break;
+
+    default:
+        g_assert_not_reached();
     }
 
     return (regime_sctlr(env, mmu_idx) & SCTLR_M) == 0;
-- 
2.25.1