hw/boards: Add struct CpuTopology to MachineState

The cpu topology property CpuTopology is added to the MachineState
and its members are initialized with the leagcy global smp variables.

From this commit, the code in the system emulation mode is supposed to
use cpu topology variables from MachineState instead of the global ones
defined in vl.c and there is no semantic change.
Suggested-by: NIgor Mammedov <imammedo@redhat.com>
Suggested-by: NEduardo Habkost <ehabkost@redhat.com>
Signed-off-by: NLike Xu <like.xu@linux.intel.com>
Reviewed-by: NAlistair Francis <alistair.francis@wdc.com>
Message-Id: <20190518205428.90532-2-like.xu@linux.intel.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>

include/hw/boards.h

@@ -232,6 +232,20 @@ typedef struct DeviceMemoryState {
     MemoryRegion mr;
 } DeviceMemoryState;
 
+/**
+ * CpuTopology:
+ * @cpus: the number of present logical processors on the machine
+ * @cores: the number of cores in one package
+ * @threads: the number of threads in one core
+ * @max_cpus: the maximum number of logical processors on the machine
+ */
+typedef struct CpuTopology {
+    unsigned int cpus;
+    unsigned int cores;
+    unsigned int threads;
+    unsigned int max_cpus;
+} CpuTopology;
+
 /**
  * MachineState:
  */
@@ -274,6 +288,7 @@ struct MachineState {
     const char *cpu_type;
     AccelState *accelerator;
     CPUArchIdList *possible_cpus;
+    CpuTopology smp;
     struct NVDIMMState *nvdimms_state;
 };
 

vl.c

@@ -4014,6 +4014,11 @@ int main(int argc, char **argv, char **envp)
 
     smp_parse(qemu_opts_find(qemu_find_opts("smp-opts"), NULL));
 
+    current_machine->smp.cpus = smp_cpus;
+    current_machine->smp.max_cpus = max_cpus;
+    current_machine->smp.cores = smp_cores;
+    current_machine->smp.threads = smp_threads;
+
     /* sanity-check smp_cpus and max_cpus against machine_class */
     if (smp_cpus < machine_class->min_cpus) {
         error_report("Invalid SMP CPUs %d. The min CPUs "