[PATCH v2 07/36] target/arm/hvf: Replace hvf_sreg_match with hvf_sreg_list

[Richard Henderson <richard.henderson@linaro.org>]

Change hvf_get_registers and hvf_put_registers to iterate over
cpregs_indexes instead of hvf_sreg_match.

This lets us drop the cp_idx member of hvf_sreg_match, which leaves
only one member in the struct.  Replace the struct with a const array.
Instead of int, use the proper enum type: hv_sys_reg_t.
Rename from hvf_sreg_match to hvf_sreg_list because there is no
longer any matching going on.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/hvf/hvf.c | 45 +++++++++++++++-----------------------------
 1 file changed, 15 insertions(+), 30 deletions(-)

diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 98f49ce33a..b043eac8c6 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -394,11 +394,6 @@ static const struct hvf_reg_match hvf_fpreg_match[] = {
     { HV_SIMD_FP_REG_Q31, offsetof(CPUARMState, vfp.zregs[31]) },
 };
 
-struct hvf_sreg_match {
-    int reg;
-    uint32_t cp_idx;
-};
-
 /*
  * QEMU uses KVM system register ids in the migration format.
  * Conveniently, HVF uses the same encoding of the op* and cr* parameters
@@ -419,9 +414,9 @@ struct hvf_sreg_match {
 
 #undef DEF_SYSREG
 
-#define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2)  { HVF_ID },
+#define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2)  HVF_ID,
 
-static struct hvf_sreg_match hvf_sreg_match[] = {
+static const hv_sys_reg_t hvf_sreg_list[] = {
 #include "sysreg.c.inc"
 };
 
@@ -434,7 +429,7 @@ int hvf_get_registers(CPUState *cpu)
     hv_return_t ret;
     uint64_t val;
     hv_simd_fp_uchar16_t fpval;
-    int i;
+    int i, n;
 
     for (i = 0; i < ARRAY_SIZE(hvf_reg_match); i++) {
         ret = hv_vcpu_get_reg(cpu->accel->fd, hvf_reg_match[i].reg, &val);
@@ -463,13 +458,9 @@ int hvf_get_registers(CPUState *cpu)
     assert_hvf_ok(ret);
     pstate_write(env, val);
 
-    for (i = 0; i < ARRAY_SIZE(hvf_sreg_match); i++) {
-        int hvf_id = hvf_sreg_match[i].reg;
-        uint64_t kvm_id = HVF_TO_KVMID(hvf_id);
-
-        if (hvf_sreg_match[i].cp_idx == -1) {
-            continue;
-        }
+    for (i = 0, n = arm_cpu->cpreg_array_len; i < n; i++) {
+        uint64_t kvm_id = arm_cpu->cpreg_indexes[i];
+        int hvf_id = KVMID_TO_HVF(kvm_id);
 
         if (cpu->accel->guest_debug_enabled) {
             /* Handle debug registers */
@@ -553,7 +544,7 @@ int hvf_get_registers(CPUState *cpu)
 
                 val = read_raw_cp_reg(env, ri);
 
-                arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx] = val;
+                arm_cpu->cpreg_values[i] = val;
                 continue;
             }
             }
@@ -562,7 +553,7 @@ int hvf_get_registers(CPUState *cpu)
         ret = hv_vcpu_get_sys_reg(cpu->accel->fd, hvf_id, &val);
         assert_hvf_ok(ret);
 
-        arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx] = val;
+        arm_cpu->cpreg_values[i] = val;
     }
     assert(write_list_to_cpustate(arm_cpu));
 
@@ -578,7 +569,7 @@ int hvf_put_registers(CPUState *cpu)
     hv_return_t ret;
     uint64_t val;
     hv_simd_fp_uchar16_t fpval;
-    int i;
+    int i, n;
 
     for (i = 0; i < ARRAY_SIZE(hvf_reg_match); i++) {
         val = *(uint64_t *)((void *)env + hvf_reg_match[i].offset);
@@ -605,12 +596,9 @@ int hvf_put_registers(CPUState *cpu)
     aarch64_save_sp(env, arm_current_el(env));
 
     assert(write_cpustate_to_list(arm_cpu, false));
-    for (i = 0; i < ARRAY_SIZE(hvf_sreg_match); i++) {
-        int hvf_id = hvf_sreg_match[i].reg;
-
-        if (hvf_sreg_match[i].cp_idx == -1) {
-            continue;
-        }
+    for (i = 0, n = arm_cpu->cpreg_array_len; i < n; i++) {
+        uint64_t kvm_id = arm_cpu->cpreg_indexes[i];
+        int hvf_id = KVMID_TO_HVF(kvm_id);
 
         if (cpu->accel->guest_debug_enabled) {
             /* Handle debug registers */
@@ -688,7 +676,7 @@ int hvf_put_registers(CPUState *cpu)
             }
         }
 
-        val = arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx];
+        val = arm_cpu->cpreg_values[i];
         ret = hv_vcpu_set_sys_reg(cpu->accel->fd, hvf_id, val);
         assert_hvf_ok(ret);
     }
@@ -899,7 +887,7 @@ int hvf_arch_init_vcpu(CPUState *cpu)
 {
     ARMCPU *arm_cpu = ARM_CPU(cpu);
     CPUARMState *env = &arm_cpu->env;
-    uint32_t sregs_match_len = ARRAY_SIZE(hvf_sreg_match);
+    uint32_t sregs_match_len = ARRAY_SIZE(hvf_sreg_list);
     uint32_t sregs_cnt = 0;
     uint64_t pfr;
     hv_return_t ret;
@@ -924,17 +912,14 @@ int hvf_arch_init_vcpu(CPUState *cpu)
 
     /* Populate cp list for all known sysregs */
     for (i = 0; i < sregs_match_len; i++) {
-        int hvf_id = hvf_sreg_match[i].reg;
+        hv_sys_reg_t hvf_id = hvf_sreg_list[i];
         uint64_t kvm_id = HVF_TO_KVMID(hvf_id);
         uint32_t key = kvm_to_cpreg_id(kvm_id);
         const ARMCPRegInfo *ri = get_arm_cp_reginfo(arm_cpu->cp_regs, key);
 
         if (ri) {
             assert(!(ri->type & ARM_CP_NO_RAW));
-            hvf_sreg_match[i].cp_idx = sregs_cnt;
             arm_cpu->cpreg_indexes[sregs_cnt++] = kvm_id;
-        } else {
-            hvf_sreg_match[i].cp_idx = -1;
         }
     }
     arm_cpu->cpreg_array_len = sregs_cnt;
-- 
2.43.0