1.1 --- a/tools/misc/xenpm.c	Tue Mar 31 11:19:26 2009 +0100
     1.2 +++ b/tools/misc/xenpm.c	Tue Mar 31 11:19:56 2009 +0100
     1.3 @@ -57,6 +57,7 @@ void show_help(void)
     1.4              "                                     it is used in ondemand governor.\n"
     1.5              " get-cpu-topology                    get thread/core/socket topology info\n"
     1.6              " set-sched-smt           enable|disable enable/disable scheduler smt power saving\n"
     1.7 +            " set-max-cstate        <num>         set the C-State limitation (<num> >= 0)\n"
     1.8              " start [seconds]                     start collect Cx/Px statistics,\n"
     1.9              "                                     output after CTRL-C or SIGINT or several seconds.\n"
    1.10              );
    1.11 @@ -122,6 +123,18 @@ static int get_cxstat_by_cpuid(int xc_fd
    1.12      return 0;
    1.13  }
    1.14  
    1.15 +static int show_max_cstate(int xc_fd)
    1.16 +{
    1.17 +    int ret = 0;
    1.18 +    uint32_t value;
    1.19 +
    1.20 +    if ( (ret = xc_get_cpuidle_max_cstate(xc_fd, &value)) )
    1.21 +        return ret;
    1.22 +
    1.23 +    printf("Max C-state: C%d\n\n", value);
    1.24 +    return 0;
    1.25 +}
    1.26 +
    1.27  static int show_cxstat_by_cpuid(int xc_fd, int cpuid)
    1.28  {
    1.29      int ret = 0;
    1.30 @@ -148,6 +161,8 @@ void cxstat_func(int argc, char *argv[])
    1.31      if ( cpuid >= max_cpu_nr )
    1.32          cpuid = -1;
    1.33  
    1.34 +    show_max_cstate(xc_fd);
    1.35 +
    1.36      if ( cpuid < 0 )
    1.37      {
    1.38          /* show cxstates on all cpus */
    1.39 @@ -864,7 +879,24 @@ void set_sched_smt_func(int argc, char *
    1.40  
    1.41      rc = xc_set_sched_opt_smt(xc_fd, value);
    1.42      printf("%s sched_smt_power_savings %s\n", argv[0],
    1.43 -                    rc? "failed":"successeed" );
    1.44 +                    rc? "failed":"succeeded" );
    1.45 +
    1.46 +    return;
    1.47 +}
    1.48 +
    1.49 +void set_max_cstate_func(int argc, char *argv[])
    1.50 +{
    1.51 +    int value, rc;
    1.52 +
    1.53 +    if ( argc != 1 || sscanf(argv[0], "%d", &value) != 1 || value < 0 )
    1.54 +    {
    1.55 +        show_help();
    1.56 +        exit(-1);
    1.57 +    }
    1.58 +
    1.59 +    rc = xc_set_cpuidle_max_cstate(xc_fd, (uint32_t)value);
    1.60 +    printf("set max_cstate to C%d %s\n", value,
    1.61 +                    rc? "failed":"succeeded" );
    1.62  
    1.63      return;
    1.64  }
    1.65 @@ -886,6 +918,7 @@ struct {
    1.66      { "set-up-threshold", scaling_up_threshold_func },
    1.67      { "get-cpu-topology", cpu_topology_func},
    1.68      { "set-sched-smt", set_sched_smt_func},
    1.69 +    { "set-max-cstate", set_max_cstate_func},
    1.70  };
    1.71  
    1.72  int main(int argc, char *argv[])