ppc: spapr: Rename cpu_dt_id to vcpu_id

This field actually records the VCPU ID used by KVM and, although the
value is also used in the device tree it is primarily the VCPU ID so
rename it as such.

Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
[dwg: Updated comment missed in cpu.h]
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/ppc/ppc.c

@@ -1359,19 +1359,19 @@ void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
 }
 
 /* CPU device-tree ID helpers */
-int ppc_get_vcpu_dt_id(PowerPCCPU *cpu)
+int ppc_get_vcpu_id(PowerPCCPU *cpu)
 {
-    return cpu->cpu_dt_id;
+    return cpu->vcpu_id;
 }
 
-PowerPCCPU *ppc_get_vcpu_by_dt_id(int cpu_dt_id)
+PowerPCCPU *ppc_get_cpu_by_vcpu_id(int vcpu_id)
 {
     CPUState *cs;
 
     CPU_FOREACH(cs) {
         PowerPCCPU *cpu = POWERPC_CPU(cs);
 
-        if (cpu->cpu_dt_id == cpu_dt_id) {
+        if (cpu->vcpu_id == vcpu_id) {
             return cpu;
         }
     }

hw/ppc/spapr.c

@@ -208,7 +208,7 @@ static int spapr_fixup_cpu_smt_dt(void *fdt, int offset, PowerPCCPU *cpu,
     int i, ret = 0;
     uint32_t servers_prop[smt_threads];
     uint32_t gservers_prop[smt_threads * 2];
-    int index = ppc_get_vcpu_dt_id(cpu);
+    int index = ppc_get_vcpu_id(cpu);
 
     if (cpu->compat_pvr) {
         ret = fdt_setprop_cell(fdt, offset, "cpu-version", cpu->compat_pvr);
@@ -237,7 +237,7 @@ static int spapr_fixup_cpu_smt_dt(void *fdt, int offset, PowerPCCPU *cpu,
 
 static int spapr_fixup_cpu_numa_dt(void *fdt, int offset, PowerPCCPU *cpu)
 {
-    int index = ppc_get_vcpu_dt_id(cpu);
+    int index = ppc_get_vcpu_id(cpu);
     uint32_t associativity[] = {cpu_to_be32(0x5),
                                 cpu_to_be32(0x0),
                                 cpu_to_be32(0x0),
@@ -341,7 +341,7 @@ static int spapr_fixup_cpu_dt(void *fdt, sPAPRMachineState *spapr)
         PowerPCCPU *cpu = POWERPC_CPU(cs);
         CPUPPCState *env = &cpu->env;
         DeviceClass *dc = DEVICE_GET_CLASS(cs);
-        int index = ppc_get_vcpu_dt_id(cpu);
+        int index = ppc_get_vcpu_id(cpu);
         int compat_smt = MIN(smp_threads, ppc_compat_max_threads(cpu));
 
         if ((index % smt) != 0) {
@@ -493,7 +493,7 @@ static void spapr_populate_cpu_dt(CPUState *cs, void *fdt, int offset,
     PowerPCCPU *cpu = POWERPC_CPU(cs);
     CPUPPCState *env = &cpu->env;
     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cs);
-    int index = ppc_get_vcpu_dt_id(cpu);
+    int index = ppc_get_vcpu_id(cpu);
     uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
                        0xffffffff, 0xffffffff};
     uint32_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq()
@@ -626,7 +626,7 @@ static void spapr_populate_cpus_dt_node(void *fdt, sPAPRMachineState *spapr)
      */
     CPU_FOREACH_REVERSE(cs) {
         PowerPCCPU *cpu = POWERPC_CPU(cs);
-        int index = ppc_get_vcpu_dt_id(cpu);
+        int index = ppc_get_vcpu_id(cpu);
         DeviceClass *dc = DEVICE_GET_CLASS(cs);
         int offset;
 
@@ -3025,7 +3025,7 @@ static void *spapr_populate_hotplug_cpu_dt(CPUState *cs, int *fdt_offset,
 {
     PowerPCCPU *cpu = POWERPC_CPU(cs);
     DeviceClass *dc = DEVICE_GET_CLASS(cs);
-    int id = ppc_get_vcpu_dt_id(cpu);
+    int id = ppc_get_vcpu_id(cpu);
     void *fdt;
     int offset, fdt_size;
     char *nodename;
@@ -3433,9 +3433,9 @@ static void spapr_ics_resend(XICSFabric *dev)
     ics_resend(spapr->ics);
 }
 
-static ICPState *spapr_icp_get(XICSFabric *xi, int cpu_dt_id)
+static ICPState *spapr_icp_get(XICSFabric *xi, int vcpu_id)
 {
-    PowerPCCPU *cpu = ppc_get_vcpu_by_dt_id(cpu_dt_id);
+    PowerPCCPU *cpu = ppc_get_cpu_by_vcpu_id(vcpu_id);
 
     return cpu ? ICP(cpu->intc) : NULL;
 }

hw/ppc/spapr_hcall.c

@@ -999,7 +999,7 @@ static target_ulong h_register_vpa(PowerPCCPU *cpu, sPAPRMachineState *spapr,
     CPUPPCState *tenv;
     PowerPCCPU *tcpu;
 
-    tcpu = ppc_get_vcpu_by_dt_id(procno);
+    tcpu = ppc_get_cpu_by_vcpu_id(procno);
     if (!tcpu) {
         return H_PARAMETER;
     }
@@ -1431,7 +1431,7 @@ static target_ulong h_signal_sys_reset(PowerPCCPU *cpu,
 
     } else {
         /* Unicast */
-        cs = CPU(ppc_get_vcpu_by_dt_id(target));
+        cs = CPU(ppc_get_cpu_by_vcpu_id(target));
         if (cs) {
             run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL);
             return H_SUCCESS;

hw/ppc/spapr_rtas.c

@@ -104,7 +104,7 @@ static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
     }
 
     id = rtas_ld(args, 0);
-    cpu = ppc_get_vcpu_by_dt_id(id);
+    cpu = ppc_get_cpu_by_vcpu_id(id);
     if (cpu != NULL) {
         if (CPU(cpu)->halted) {
             rtas_st(rets, 1, 0);
@@ -158,7 +158,7 @@ static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPRMachineState *spapr,
     start = rtas_ld(args, 1);
     r3 = rtas_ld(args, 2);
 
-    cpu = ppc_get_vcpu_by_dt_id(id);
+    cpu = ppc_get_cpu_by_vcpu_id(id);
     if (cpu != NULL) {
         CPUState *cs = CPU(cpu);
         CPUPPCState *env = &cpu->env;

target/ppc/cpu.h

@@ -1188,7 +1188,7 @@ typedef struct PPCVirtualHypervisorClass PPCVirtualHypervisorClass;
 /**
  * PowerPCCPU:
  * @env: #CPUPPCState
- * @cpu_dt_id: CPU index used in the device tree. KVM uses this index too
+ * @vcpu_id: vCPU identifier given to KVM
  * @compat_pvr: Current logical PVR, zero if in "raw" mode
  *
  * A PowerPC CPU.
@@ -1199,7 +1199,7 @@ struct PowerPCCPU {
     /*< public >*/
 
     CPUPPCState env;
-    int cpu_dt_id;
+    int vcpu_id;
     uint32_t compat_pvr;
     PPCVirtualHypervisor *vhyp;
     Object *intc;
@@ -2515,22 +2515,22 @@ static inline bool lsw_reg_in_range(int start, int nregs, int rx)
 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUPPCState *env);
 
 /**
- * ppc_get_vcpu_dt_id:
+ * ppc_get_vcpu_id:
  * @cs: a PowerPCCPU struct.
  *
  * Returns a device-tree ID for a CPU.
  */
-int ppc_get_vcpu_dt_id(PowerPCCPU *cpu);
+int ppc_get_vcpu_id(PowerPCCPU *cpu);
 
 /**
- * ppc_get_vcpu_by_dt_id:
- * @cpu_dt_id: a device tree id
+ * ppc_get_cpu_by_vcpu_id:
+ * @vcpu_id: a VCPU ID
  *
- * Searches for a CPU by @cpu_dt_id.
+ * Searches for a CPU by @vcpu_id.
  *
  * Returns: a PowerPCCPU struct
  */
-PowerPCCPU *ppc_get_vcpu_by_dt_id(int cpu_dt_id);
+PowerPCCPU *ppc_get_cpu_by_vcpu_id(int vcpu_id);
 
 void ppc_maybe_bswap_register(CPUPPCState *env, uint8_t *mem_buf, int len);
 #endif /* PPC_CPU_H */

target/ppc/kvm.c

@@ -520,7 +520,7 @@ bool kvmppc_is_mem_backend_page_size_ok(const char *obj_path)
 
 unsigned long kvm_arch_vcpu_id(CPUState *cpu)
 {
-    return ppc_get_vcpu_dt_id(POWERPC_CPU(cpu));
+    return ppc_get_vcpu_id(POWERPC_CPU(cpu));
 }
 
 /* e500 supports 2 h/w breakpoint and 2 watchpoint.

target/ppc/translate_init.c

@@ -9838,14 +9838,14 @@ static void ppc_cpu_realizefn(DeviceState *dev, Error **errp)
     }
 
 #if !defined(CONFIG_USER_ONLY)
-    cpu->cpu_dt_id = (cs->cpu_index / smp_threads) * max_smt
+    cpu->vcpu_id = (cs->cpu_index / smp_threads) * max_smt
         + (cs->cpu_index % smp_threads);
 
-    if (kvm_enabled() && !kvm_vcpu_id_is_valid(cpu->cpu_dt_id)) {
-        error_setg(errp, "Can't create CPU with id %d in KVM", cpu->cpu_dt_id);
+    if (kvm_enabled() && !kvm_vcpu_id_is_valid(cpu->vcpu_id)) {
+        error_setg(errp, "Can't create CPU with id %d in KVM", cpu->vcpu_id);
         error_append_hint(errp, "Adjust the number of cpus to %d "
                           "or try to raise the number of threads per core\n",
-                          cpu->cpu_dt_id * smp_threads / max_smt);
+                          cpu->vcpu_id * smp_threads / max_smt);
         goto unrealize;
     }
 #endif