target/arm: Add key parameter to add_cpreg_to_hashtable

Hoist the computation of key into the caller, where
state is a known constant.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
[PMM: added comment about CRN key field increment]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 20 insertions, 20 deletions

diff --git a/target/arm/helper.c b/target/arm/helper.c
index ade16138e7..8a8fa8c40e 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7369,26 +7369,13 @@ void register_cp_regs_for_features(ARMCPU *cpu)
 static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
                                    CPState state, CPSecureState secstate,
                                    int cp, int crm, int opc1, int opc2,
-                                   const char *name)
+                                   const char *name, uint32_t key)
 {
     CPUARMState *env = &cpu->env;
-    uint32_t key;
     ARMCPRegInfo *r2;
-    bool is64 = r->type & ARM_CP_64BIT;
     bool ns = secstate & ARM_CP_SECSTATE_NS;
     size_t name_len;
 
-    switch (state) {
-    case ARM_CP_STATE_AA32:
-        key = ENCODE_CP_REG(cp, is64, ns, r->crn, crm, opc1, opc2);
-        break;
-    case ARM_CP_STATE_AA64:
-        key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
-        break;
-    default:
-        g_assert_not_reached();
-    }
-
     /* Overriding of an existing definition must be explicitly requested. */
     if (!(r->type & ARM_CP_OVERRIDE)) {
         const ARMCPRegInfo *oldreg = get_arm_cp_reginfo(cpu->cp_regs, key);
@@ -7493,22 +7480,28 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
      * (same for secure and non-secure world) or banked.
      */
     char *name;
+    bool is64 = r->type & ARM_CP_64BIT;
+    uint32_t key = ENCODE_CP_REG(cp, is64, 0, r->crn, crm, opc1, opc2);
 
     assert(!(r->type & ARM_CP_ADD_TLBI_NXS)); /* aa64 only */
 
     switch (r->secure) {
-    case ARM_CP_SECSTATE_S:
     case ARM_CP_SECSTATE_NS:
+        key |= CP_REG_AA32_NS_MASK;
+        /* fall through */
+    case ARM_CP_SECSTATE_S:
         add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, r->secure,
-                               cp, crm, opc1, opc2, r->name);
+                               cp, crm, opc1, opc2, r->name, key);
         break;
     case ARM_CP_SECSTATE_BOTH:
         name = g_strdup_printf("%s_S", r->name);
         add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_S,
-                               cp, crm, opc1, opc2, name);
+                               cp, crm, opc1, opc2, name, key);
         g_free(name);
+
+        key |= CP_REG_AA32_NS_MASK;
         add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_NS,
-                               cp, crm, opc1, opc2, r->name);
+                               cp, crm, opc1, opc2, r->name, key);
         break;
     default:
         g_assert_not_reached();
@@ -7518,6 +7511,8 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
 static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
                                         int crm, int opc1, int opc2)
 {
+    uint32_t key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
+
     if ((r->type & ARM_CP_ADD_TLBI_NXS) &&
         cpu_isar_feature(aa64_xs, cpu)) {
         /*
@@ -7532,18 +7527,23 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
          */
         ARMCPRegInfo nxs_ri = *r;
         g_autofree char *name = g_strdup_printf("%sNXS", r->name);
+        uint32_t nxs_key;
 
         assert(nxs_ri.crn < 0xf);
         nxs_ri.crn++;
+        /* Also increment the CRN field inside the key value */
+        nxs_key = key + (1 << CP_REG_ARM64_SYSREG_CRN_SHIFT);
         if (nxs_ri.fgt) {
             nxs_ri.fgt |= R_FGT_NXS_MASK;
         }
+
         add_cpreg_to_hashtable(cpu, &nxs_ri, ARM_CP_STATE_AA64,
-                               ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2, name);
+                               ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2,
+                               name, nxs_key);
     }
 
     add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64, ARM_CP_SECSTATE_NS,
-                           0, crm, opc1, opc2, r->name);
+                           0, crm, opc1, opc2, r->name, key);
 }
 
 void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)