target-arm: Remove ARMCPU/CPUARMState from cpregs APIs used by decoder

The cpregs APIs used by the decoder (get_arm_cp_reginfo() and
cp_access_ok()) currently take either a CPUARMState* or an ARMCPU*.
This is problematic for the A64 decoder, which doesn't pass the
environment pointer around everywhere the way the 32 bit decoder
does. Adjust the parameters these functions take so that we can
copy only the relevant info from the CPUARMState into the
DisasContext and then use that.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NRichard Henderson <rth@twiddle.net>

target-arm/cpu.h

@@ -853,7 +853,7 @@ static inline void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *regs)
 {
     define_one_arm_cp_reg_with_opaque(cpu, regs, 0);
 }
-const ARMCPRegInfo *get_arm_cp_reginfo(ARMCPU *cpu, uint32_t encoded_cp);
+const ARMCPRegInfo *get_arm_cp_reginfo(GHashTable *cpregs, uint32_t encoded_cp);
 
 /* CPWriteFn that can be used to implement writes-ignored behaviour */
 int arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri,
@@ -866,10 +866,10 @@ int arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value);
  */
 void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *opaque);
 
-static inline bool cp_access_ok(CPUARMState *env,
+static inline bool cp_access_ok(int current_pl,
                                 const ARMCPRegInfo *ri, int isread)
 {
-    return (ri->access >> ((arm_current_pl(env) * 2) + isread)) & 1;
+    return (ri->access >> ((current_pl * 2) + isread)) & 1;
 }
 
 /**

target-arm/helper.c

@@ -186,7 +186,7 @@ bool write_cpustate_to_list(ARMCPU *cpu)
         uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
         const ARMCPRegInfo *ri;
         uint64_t v;
-        ri = get_arm_cp_reginfo(cpu, regidx);
+        ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
         if (!ri) {
             ok = false;
             continue;
@@ -214,7 +214,7 @@ bool write_list_to_cpustate(ARMCPU *cpu)
         uint64_t readback;
         const ARMCPRegInfo *ri;
 
-        ri = get_arm_cp_reginfo(cpu, regidx);
+        ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
         if (!ri) {
             ok = false;
             continue;
@@ -242,7 +242,7 @@ static void add_cpreg_to_list(gpointer key, gpointer opaque)
     const ARMCPRegInfo *ri;
 
     regidx = *(uint32_t *)key;
-    ri = get_arm_cp_reginfo(cpu, regidx);
+    ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
 
     if (!(ri->type & ARM_CP_NO_MIGRATE)) {
         cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx);
@@ -258,7 +258,7 @@ static void count_cpreg(gpointer key, gpointer opaque)
     const ARMCPRegInfo *ri;
 
     regidx = *(uint32_t *)key;
-    ri = get_arm_cp_reginfo(cpu, regidx);
+    ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
 
     if (!(ri->type & ARM_CP_NO_MIGRATE)) {
         cpu->cpreg_array_len++;
@@ -2136,9 +2136,9 @@ void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
     }
 }
 
-const ARMCPRegInfo *get_arm_cp_reginfo(ARMCPU *cpu, uint32_t encoded_cp)
+const ARMCPRegInfo *get_arm_cp_reginfo(GHashTable *cpregs, uint32_t encoded_cp)
 {
-    return g_hash_table_lookup(cpu->cp_regs, &encoded_cp);
+    return g_hash_table_lookup(cpregs, &encoded_cp);
 }
 
 int arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri,

target-arm/translate-a64.c

@@ -3007,6 +3007,8 @@ void gen_intermediate_code_internal_a64(ARMCPU *cpu,
     dc->vfp_enabled = 0;
     dc->vec_len = 0;
     dc->vec_stride = 0;
+    dc->cp_regs = cpu->cp_regs;
+    dc->current_pl = arm_current_pl(env);
 
     init_tmp_a64_array(dc);
 

target-arm/translate.c

@@ -6498,7 +6498,6 @@ static int disas_coproc_insn(CPUARMState * env, DisasContext *s, uint32_t insn)
 {
     int cpnum, is64, crn, crm, opc1, opc2, isread, rt, rt2;
     const ARMCPRegInfo *ri;
-    ARMCPU *cpu = arm_env_get_cpu(env);
 
     cpnum = (insn >> 8) & 0xf;
     if (arm_feature(env, ARM_FEATURE_XSCALE)
@@ -6541,11 +6540,11 @@ static int disas_coproc_insn(CPUARMState * env, DisasContext *s, uint32_t insn)
     isread = (insn >> 20) & 1;
     rt = (insn >> 12) & 0xf;
 
-    ri = get_arm_cp_reginfo(cpu,
+    ri = get_arm_cp_reginfo(s->cp_regs,
                             ENCODE_CP_REG(cpnum, is64, crn, crm, opc1, opc2));
     if (ri) {
         /* Check access permissions */
-        if (!cp_access_ok(env, ri, isread)) {
+        if (!cp_access_ok(s->current_pl, ri, isread)) {
             return 1;
         }
 
@@ -10269,6 +10268,8 @@ static inline void gen_intermediate_code_internal(ARMCPU *cpu,
     dc->vfp_enabled = ARM_TBFLAG_VFPEN(tb->flags);
     dc->vec_len = ARM_TBFLAG_VECLEN(tb->flags);
     dc->vec_stride = ARM_TBFLAG_VECSTRIDE(tb->flags);
+    dc->cp_regs = cpu->cp_regs;
+    dc->current_pl = arm_current_pl(env);
 
     cpu_F0s = tcg_temp_new_i32();
     cpu_F1s = tcg_temp_new_i32();

target-arm/translate.h

@@ -24,6 +24,8 @@ typedef struct DisasContext {
     int vec_len;
     int vec_stride;
     int aarch64;
+    int current_pl;
+    GHashTable *cp_regs;
 #define TMP_A64_MAX 16
     int tmp_a64_count;
     TCGv_i64 tmp_a64[TMP_A64_MAX];