Define X86ASIdx as enum, like ARM's ARMASIdx, so that it's clear index 0
is for memory and index 1 is for SMM.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Tested-By: Kirill Martynov <stdcalllevi@yandex-team.ru>
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
 accel/kvm/kvm-all.c              | 2 +-
 target/i386/cpu.h                | 5 +++++
 target/i386/kvm/kvm-cpu.c        | 2 +-
 target/i386/kvm/kvm.c            | 4 ++--
 target/i386/tcg/system/tcg-cpu.c | 4 ++--
 5 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 890d5ea9f865..e56c217a5a0d 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -2797,7 +2797,7 @@ static int kvm_init(AccelState *as, MachineState *ms)
     s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region;
 
     kvm_memory_listener_register(s, &s->memory_listener,
-                                 &address_space_memory, 0, "kvm-memory");
+                                 &address_space_memory, X86ASIdx_MEM, "kvm-memory");
     memory_listener_register(&kvm_io_listener,
                              &address_space_io);
 
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index f977fc49a774..e0be7a740685 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -2574,6 +2574,11 @@ static inline bool x86_has_cpuid_0x1f(X86CPU *cpu)
 void x86_cpu_set_a20(X86CPU *cpu, int a20_state);
 void cpu_sync_avx_hflag(CPUX86State *env);
 
+typedef enum X86ASIdx {
+    X86ASIdx_MEM = 0,
+    X86ASIdx_SMM = 1,
+} X86ASIdx;
+
 #ifndef CONFIG_USER_ONLY
 static inline int x86_asidx_from_attrs(CPUState *cs, MemTxAttrs attrs)
 {
diff --git a/target/i386/kvm/kvm-cpu.c b/target/i386/kvm/kvm-cpu.c
index 1dc1ba9b4869..9c25b5583955 100644
--- a/target/i386/kvm/kvm-cpu.c
+++ b/target/i386/kvm/kvm-cpu.c
@@ -99,7 +99,7 @@ static bool kvm_cpu_realizefn(CPUState *cs, Error **errp)
      * initialized at register_smram_listener() after machine init done.
      */
     cs->num_ases = x86_machine_is_smm_enabled(X86_MACHINE(current_machine)) ? 2 : 1;
-    cpu_address_space_init(cs, 0, "cpu-memory", cs->memory);
+    cpu_address_space_init(cs, X86ASIdx_MEM, "cpu-memory", cs->memory);
 
     return true;
 }
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 47fb5c673c8e..5621200be0f0 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -2728,10 +2728,10 @@ static void register_smram_listener(Notifier *n, void *unused)
 
     address_space_init(&smram_address_space, &smram_as_root, "KVM-SMRAM");
     kvm_memory_listener_register(kvm_state, &smram_listener,
-                                 &smram_address_space, 1, "kvm-smram");
+                                 &smram_address_space, X86ASIdx_SMM, "kvm-smram");
 
     CPU_FOREACH(cpu) {
-        cpu_address_space_init(cpu, 1, "cpu-smm", &smram_as_root);
+        cpu_address_space_init(cpu, X86ASIdx_SMM, "cpu-smm", &smram_as_root);
     }
 }
 
diff --git a/target/i386/tcg/system/tcg-cpu.c b/target/i386/tcg/system/tcg-cpu.c
index 0538a4fd51a3..7255862c2449 100644
--- a/target/i386/tcg/system/tcg-cpu.c
+++ b/target/i386/tcg/system/tcg-cpu.c
@@ -74,8 +74,8 @@ bool tcg_cpu_realizefn(CPUState *cs, Error **errp)
     memory_region_set_enabled(cpu->cpu_as_mem, true);
 
     cs->num_ases = 2;
-    cpu_address_space_init(cs, 0, "cpu-memory", cs->memory);
-    cpu_address_space_init(cs, 1, "cpu-smm", cpu->cpu_as_root);
+    cpu_address_space_init(cs, X86ASIdx_MEM, "cpu-memory", cs->memory);
+    cpu_address_space_init(cs, X86ASIdx_SMM, "cpu-smm", cpu->cpu_as_root);
 
     /* ... SMRAM with higher priority, linked from /machine/smram.  */
     cpu->machine_done.notify = tcg_cpu_machine_done;
-- 
2.43.0