diff --git a/hw/intc/xics.c b/hw/intc/xics.c
index 76dd6f5..493a2a4 100644
--- a/hw/intc/xics.c
+++ b/hw/intc/xics.c
@@ -866,10 +866,10 @@ static void xics_realize(DeviceState *dev, Error **errp)
     }
 
     /* Registration of global state belongs into realize */
-    spapr_rtas_register("ibm,set-xive", rtas_set_xive);
-    spapr_rtas_register("ibm,get-xive", rtas_get_xive);
-    spapr_rtas_register("ibm,int-off", rtas_int_off);
-    spapr_rtas_register("ibm,int-on", rtas_int_on);
+    spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_set_xive);
+    spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_get_xive);
+    spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_int_off);
+    spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_int_on);
 
     spapr_register_hypercall(H_CPPR, h_cppr);
     spapr_register_hypercall(H_IPI, h_ipi);
diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c
index 09476ae..4704c98 100644
--- a/hw/intc/xics_kvm.c
+++ b/hw/intc/xics_kvm.c
@@ -38,10 +38,6 @@
 typedef struct KVMXICSState {
     XICSState parent_obj;
 
-    uint32_t set_xive_token;
-    uint32_t get_xive_token;
-    uint32_t int_off_token;
-    uint32_t int_on_token;
     int kernel_xics_fd;
 } KVMXICSState;
 
@@ -392,32 +388,30 @@ static void xics_kvm_realize(DeviceState *dev, Error **errp)
         goto fail;
     }
 
-    icpkvm->set_xive_token = spapr_rtas_register("ibm,set-xive", rtas_dummy);
-    icpkvm->get_xive_token = spapr_rtas_register("ibm,get-xive", rtas_dummy);
-    icpkvm->int_off_token = spapr_rtas_register("ibm,int-off", rtas_dummy);
-    icpkvm->int_on_token = spapr_rtas_register("ibm,int-on", rtas_dummy);
+    spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_dummy);
+    spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_dummy);
+    spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_dummy);
+    spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_dummy);
 
-    rc = kvmppc_define_rtas_kernel_token(icpkvm->set_xive_token,
-                                         "ibm,set-xive");
+    rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_SET_XIVE, "ibm,set-xive");
     if (rc < 0) {
         error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,set-xive");
         goto fail;
     }
 
-    rc = kvmppc_define_rtas_kernel_token(icpkvm->get_xive_token,
-                                         "ibm,get-xive");
+    rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_GET_XIVE, "ibm,get-xive");
     if (rc < 0) {
         error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,get-xive");
         goto fail;
     }
 
-    rc = kvmppc_define_rtas_kernel_token(icpkvm->int_on_token, "ibm,int-on");
+    rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_INT_ON, "ibm,int-on");
     if (rc < 0) {
         error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,int-on");
         goto fail;
     }
 
-    rc = kvmppc_define_rtas_kernel_token(icpkvm->int_off_token, "ibm,int-off");
+    rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_INT_OFF, "ibm,int-off");
     if (rc < 0) {
         error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,int-off");
         goto fail;
diff --git a/hw/nvram/spapr_nvram.c b/hw/nvram/spapr_nvram.c
index af49c46..6a72ef4 100644
--- a/hw/nvram/spapr_nvram.c
+++ b/hw/nvram/spapr_nvram.c
@@ -153,8 +153,8 @@ static int spapr_nvram_init(VIOsPAPRDevice *dev)
         return -1;
     }
 
-    spapr_rtas_register("nvram-fetch", rtas_nvram_fetch);
-    spapr_rtas_register("nvram-store", rtas_nvram_store);
+    spapr_rtas_register(RTAS_NVRAM_FETCH, "nvram-fetch", rtas_nvram_fetch);
+    spapr_rtas_register(RTAS_NVRAM_STORE, "nvram-store", rtas_nvram_store);
 
     return 0;
 }
diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
index 16fa49e..5ce96a7 100644
--- a/hw/ppc/spapr_events.c
+++ b/hw/ppc/spapr_events.c
@@ -317,5 +317,6 @@ void spapr_events_init(sPAPREnvironment *spapr)
     spapr->epow_irq = spapr_allocate_msi(0);
     spapr->epow_notifier.notify = spapr_powerdown_req;
     qemu_register_powerdown_notifier(&spapr->epow_notifier);
-    spapr_rtas_register("check-exception", check_exception);
+    spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception",
+                        check_exception);
 }
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 988f8cb..8607c88 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -909,14 +909,20 @@ int spapr_populate_pci_dt(sPAPRPHBState *phb,
 
 void spapr_pci_rtas_init(void)
 {
-    spapr_rtas_register("read-pci-config", rtas_read_pci_config);
-    spapr_rtas_register("write-pci-config", rtas_write_pci_config);
-    spapr_rtas_register("ibm,read-pci-config", rtas_ibm_read_pci_config);
-    spapr_rtas_register("ibm,write-pci-config", rtas_ibm_write_pci_config);
+    spapr_rtas_register(RTAS_READ_PCI_CONFIG, "read-pci-config",
+                        rtas_read_pci_config);
+    spapr_rtas_register(RTAS_WRITE_PCI_CONFIG, "write-pci-config",
+                        rtas_write_pci_config);
+    spapr_rtas_register(RTAS_IBM_READ_PCI_CONFIG, "ibm,read-pci-config",
+                        rtas_ibm_read_pci_config);
+    spapr_rtas_register(RTAS_IBM_WRITE_PCI_CONFIG, "ibm,write-pci-config",
+                        rtas_ibm_write_pci_config);
     if (msi_supported) {
-        spapr_rtas_register("ibm,query-interrupt-source-number",
+        spapr_rtas_register(RTAS_IBM_QUERY_INTERRUPT_SOURCE_NUMBER,
+                            "ibm,query-interrupt-source-number",
                             rtas_ibm_query_interrupt_source_number);
-        spapr_rtas_register("ibm,change-msi", rtas_ibm_change_msi);
+        spapr_rtas_register(RTAS_IBM_CHANGE_MSI, "ibm,change-msi",
+                            rtas_ibm_change_msi);
     }
 }
 
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index ea4a2b2..2b8edea 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -35,9 +35,6 @@
 
 #include <libfdt.h>
 
-#define TOKEN_BASE      0x2000
-#define TOKEN_MAX       0x100
-
 static void rtas_display_character(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                    uint32_t token, uint32_t nargs,
                                    target_ulong args,
@@ -270,17 +267,14 @@ static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
 static struct rtas_call {
     const char *name;
     spapr_rtas_fn fn;
-} rtas_table[TOKEN_MAX];
-
-static struct rtas_call *rtas_next = rtas_table;
+} rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
 
 target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                              uint32_t token, uint32_t nargs, target_ulong args,
                              uint32_t nret, target_ulong rets)
 {
-    if ((token >= TOKEN_BASE)
-        && ((token - TOKEN_BASE) < TOKEN_MAX)) {
-        struct rtas_call *call = rtas_table + (token - TOKEN_BASE);
+    if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
+        struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
 
         if (call->fn) {
             call->fn(cpu, spapr, token, nargs, args, nret, rets);
@@ -302,23 +296,22 @@ target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr,
     return H_PARAMETER;
 }
 
-int spapr_rtas_register(const char *name, spapr_rtas_fn fn)
+void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
 {
-    int i;
-
-    for (i = 0; i < (rtas_next - rtas_table); i++) {
-        if (strcmp(name, rtas_table[i].name) == 0) {
-            fprintf(stderr, "RTAS call \"%s\" registered twice\n", name);
-            exit(1);
-        }
+    if (!((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX))) {
+        fprintf(stderr, "RTAS invalid token 0x%x\n", token);
+        exit(1);
     }
 
-    assert(rtas_next < (rtas_table + TOKEN_MAX));
-
-    rtas_next->name = name;
-    rtas_next->fn = fn;
+    token -= RTAS_TOKEN_BASE;
+    if (rtas_table[token].name) {
+        fprintf(stderr, "RTAS call \"%s\" is registered already as 0x%x\n",
+                rtas_table[token].name, token);
+        exit(1);
+    }
 
-    return (rtas_next++ - rtas_table) + TOKEN_BASE;
+    rtas_table[token].name = name;
+    rtas_table[token].fn = fn;
 }
 
 int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
@@ -358,7 +351,7 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
         return ret;
     }
 
-    for (i = 0; i < TOKEN_MAX; i++) {
+    for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
         struct rtas_call *call = &rtas_table[i];
 
         if (!call->name) {
@@ -366,7 +359,7 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
         }
 
         ret = qemu_fdt_setprop_cell(fdt, "/rtas", call->name,
-                                    i + TOKEN_BASE);
+                                    i + RTAS_TOKEN_BASE);
         if (ret < 0) {
             fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
                     call->name, fdt_strerror(ret));
@@ -379,18 +372,24 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
 
 static void core_rtas_register_types(void)
 {
-    spapr_rtas_register("display-character", rtas_display_character);
-    spapr_rtas_register("get-time-of-day", rtas_get_time_of_day);
-    spapr_rtas_register("set-time-of-day", rtas_set_time_of_day);
-    spapr_rtas_register("power-off", rtas_power_off);
-    spapr_rtas_register("system-reboot", rtas_system_reboot);
-    spapr_rtas_register("query-cpu-stopped-state",
+    spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
+                        rtas_display_character);
+    spapr_rtas_register(RTAS_GET_TIME_OF_DAY, "get-time-of-day",
+                        rtas_get_time_of_day);
+    spapr_rtas_register(RTAS_SET_TIME_OF_DAY, "set-time-of-day",
+                        rtas_set_time_of_day);
+    spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
+    spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
+                        rtas_system_reboot);
+    spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
                         rtas_query_cpu_stopped_state);
-    spapr_rtas_register("start-cpu", rtas_start_cpu);
-    spapr_rtas_register("stop-self", rtas_stop_self);
-    spapr_rtas_register("ibm,get-system-parameter",
+    spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
+    spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
+    spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
+                        "ibm,get-system-parameter",
                         rtas_ibm_get_system_parameter);
-    spapr_rtas_register("ibm,set-system-parameter",
+    spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
+                        "ibm,set-system-parameter",
                         rtas_ibm_set_system_parameter);
 }
 
diff --git a/hw/ppc/spapr_vio.c b/hw/ppc/spapr_vio.c
index 04e16ae..a195fd1 100644
--- a/hw/ppc/spapr_vio.c
+++ b/hw/ppc/spapr_vio.c
@@ -517,8 +517,9 @@ VIOsPAPRBus *spapr_vio_bus_init(void)
     spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
 
     /* RTAS calls */
-    spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
-    spapr_rtas_register("quiesce", rtas_quiesce);
+    spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS, "ibm,set-tce-bypass",
+                        rtas_set_tce_bypass);
+    spapr_rtas_register(RTAS_QUIESCE, "quiesce", rtas_quiesce);
 
     return bus;
 }
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 08c301f..91923de 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -358,6 +358,45 @@ static inline int spapr_allocate_lsi(int hint)
 #define RTAS_OUT_NOT_SUPPORTED      -3
 #define RTAS_OUT_NOT_AUTHORIZED     -9002
 
+/* RTAS tokens */
+#define RTAS_TOKEN_BASE      0x2000
+
+#define RTAS_DISPLAY_CHARACTER                  (RTAS_TOKEN_BASE + 0x00)
+#define RTAS_GET_TIME_OF_DAY                    (RTAS_TOKEN_BASE + 0x01)
+#define RTAS_SET_TIME_OF_DAY                    (RTAS_TOKEN_BASE + 0x02)
+#define RTAS_POWER_OFF                          (RTAS_TOKEN_BASE + 0x03)
+#define RTAS_SYSTEM_REBOOT                      (RTAS_TOKEN_BASE + 0x04)
+#define RTAS_QUERY_CPU_STOPPED_STATE            (RTAS_TOKEN_BASE + 0x05)
+#define RTAS_START_CPU                          (RTAS_TOKEN_BASE + 0x06)
+#define RTAS_STOP_SELF                          (RTAS_TOKEN_BASE + 0x07)
+#define RTAS_IBM_GET_SYSTEM_PARAMETER           (RTAS_TOKEN_BASE + 0x08)
+#define RTAS_IBM_SET_SYSTEM_PARAMETER           (RTAS_TOKEN_BASE + 0x09)
+#define RTAS_IBM_SET_XIVE                       (RTAS_TOKEN_BASE + 0x0A)
+#define RTAS_IBM_GET_XIVE                       (RTAS_TOKEN_BASE + 0x0B)
+#define RTAS_IBM_INT_OFF                        (RTAS_TOKEN_BASE + 0x0C)
+#define RTAS_IBM_INT_ON                         (RTAS_TOKEN_BASE + 0x0D)
+#define RTAS_CHECK_EXCEPTION                    (RTAS_TOKEN_BASE + 0x0E)
+#define RTAS_EVENT_SCAN                         (RTAS_TOKEN_BASE + 0x0F)
+#define RTAS_IBM_SET_TCE_BYPASS                 (RTAS_TOKEN_BASE + 0x10)
+#define RTAS_QUIESCE                            (RTAS_TOKEN_BASE + 0x11)
+#define RTAS_NVRAM_FETCH                        (RTAS_TOKEN_BASE + 0x12)
+#define RTAS_NVRAM_STORE                        (RTAS_TOKEN_BASE + 0x13)
+#define RTAS_READ_PCI_CONFIG                    (RTAS_TOKEN_BASE + 0x14)
+#define RTAS_WRITE_PCI_CONFIG                   (RTAS_TOKEN_BASE + 0x15)
+#define RTAS_IBM_READ_PCI_CONFIG                (RTAS_TOKEN_BASE + 0x16)
+#define RTAS_IBM_WRITE_PCI_CONFIG               (RTAS_TOKEN_BASE + 0x17)
+#define RTAS_IBM_QUERY_INTERRUPT_SOURCE_NUMBER  (RTAS_TOKEN_BASE + 0x18)
+#define RTAS_IBM_CHANGE_MSI                     (RTAS_TOKEN_BASE + 0x19)
+#define RTAS_SET_INDICATOR                      (RTAS_TOKEN_BASE + 0x1A)
+#define RTAS_SET_POWER_LEVEL                    (RTAS_TOKEN_BASE + 0x1B)
+#define RTAS_GET_POWER_LEVEL                    (RTAS_TOKEN_BASE + 0x1C)
+#define RTAS_GET_SENSOR_STATE                   (RTAS_TOKEN_BASE + 0x1D)
+#define RTAS_IBM_CONFIGURE_CONNECTOR            (RTAS_TOKEN_BASE + 0x1E)
+#define RTAS_IBM_OS_TERM                        (RTAS_TOKEN_BASE + 0x1F)
+#define RTAS_IBM_EXTENDED_OS_TERM               (RTAS_TOKEN_BASE + 0x20)
+
+#define RTAS_TOKEN_MAX                          (RTAS_TOKEN_BASE + 0x21)
+
 static inline uint64_t ppc64_phys_to_real(uint64_t addr)
 {
     return addr & ~0xF000000000000000ULL;
@@ -377,7 +416,7 @@ typedef void (*spapr_rtas_fn)(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                               uint32_t token,
                               uint32_t nargs, target_ulong args,
                               uint32_t nret, target_ulong rets);
-int spapr_rtas_register(const char *name, spapr_rtas_fn fn);
+void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn);
 target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                              uint32_t token, uint32_t nargs, target_ulong args,
                              uint32_t nret, target_ulong rets);
