tools/power/x86/intel-speed-select: Implement base-freq commands on CascadeLake-N

Add functionality for base-freq info|enable|disable info on CascadeLake-N.

Sample output:
Intel(R) Speed Select Technology
Executing on CPU model:85[0x55]
 package-0
  die-0
    cpu-0
      speed-select-base-freq
        high-priority-base-frequency(MHz):2700000
        high-priority-cpu-mask:00000000,0000e8c0
        high-priority-cpu-list:6,7,11,13,14,15
        low-priority-base-frequency(MHz):2100000
 package-1
  die-0
    cpu-20
      speed-select-base-freq
        high-priority-base-frequency(MHz):2700000
        high-priority-cpu-mask:0000000e,8c000000
        high-priority-cpu-list:26,27,31,33,34,35
        low-priority-base-frequency(MHz):2100000

The enable command always returns success, and the disable command always
returns failed because SST-BF cannot be enabled or disabled from the OS on
CascadeLake-N.

Enable command also have support for --auto|-a option, which sets cpufreq
scaling_min to max, so that the high priority base frequency can be the
required minimum for high priority cores. Disable command with -a/--auto
option reset the setting back to the min frequency.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index 3c0eb42..1c20048 100644 (file)
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -1005,6 +1005,26 @@ static void set_tdp_level(int arg)
        isst_ctdp_display_information_end(outf);
 }
 
+static void clx_n_dump_pbf_config_for_cpu(int cpu, void *arg1, void *arg2,
+                                      void *arg3, void *arg4)
+{
+       int ret;
+
+       ret = clx_n_config(cpu);
+       if (ret) {
+               perror("isst_get_process_ctdp");
+       } else {
+               struct isst_pkg_ctdp_level_info *ctdp_level;
+               struct isst_pbf_info *pbf_info;
+
+               ctdp_level = &clx_n_pkg_dev.ctdp_level[0];
+               pbf_info = &ctdp_level->pbf_info;
+               isst_pbf_display_information(cpu, outf, tdp_level, pbf_info);
+               free_cpu_set(ctdp_level->core_cpumask);
+               free_cpu_set(pbf_info->core_cpumask);
+       }
+}
+
 static void dump_pbf_config_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
                                    void *arg4)
 {
@@ -1022,6 +1042,8 @@ static void dump_pbf_config_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
 
 static void dump_pbf_config(int arg)
 {
+       void *fn;
+
        if (cmd_help) {
                fprintf(stderr,
                        "Print Intel(R) Speed Select Technology base frequency configuration for a TDP level\n");
@@ -1035,13 +1057,18 @@ static void dump_pbf_config(int arg)
                exit(1);
        }
 
+       if (!is_clx_n_platform())
+               fn = dump_pbf_config_for_cpu;
+       else
+               fn = clx_n_dump_pbf_config_for_cpu;
+
        isst_ctdp_display_information_start(outf);
+
        if (max_target_cpus)
-               for_each_online_target_cpu_in_set(dump_pbf_config_for_cpu, NULL,
-                                                 NULL, NULL, NULL);
+               for_each_online_target_cpu_in_set(fn, NULL, NULL, NULL, NULL);
        else
-               for_each_online_package_in_set(dump_pbf_config_for_cpu, NULL,
-                                              NULL, NULL, NULL);
+               for_each_online_package_in_set(fn, NULL, NULL, NULL, NULL);
+
        isst_ctdp_display_information_end(outf);
 }
 
@@ -1235,6 +1262,19 @@ static void set_pbf_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
        int ret;
        int status = *(int *)arg4;
 
+       if (is_clx_n_platform()) {
+               if (status == 0) {
+                       ret = -1;
+                       if (auto_mode)
+                               set_scaling_min_to_cpuinfo_min(cpu);
+               } else {
+                       ret = 0;
+                       if (auto_mode)
+                               set_scaling_min_to_cpuinfo_max(cpu);
+               }
+               goto disp_result;
+       }
+
        if (auto_mode) {
                if (status) {
                        ret = set_pbf_core_power(cpu);
@@ -1763,6 +1803,9 @@ static void get_clos_assoc(int arg)
 
 static struct process_cmd_struct clx_n_cmds[] = {
        { "perf-profile", "info", dump_isst_config, 0 },
+       { "base-freq", "info", dump_pbf_config, 0 },
+       { "base-freq", "enable", set_pbf_enable, 1 },
+       { "base-freq", "disable", set_pbf_enable, 0 },
        { NULL, NULL, NULL, 0 }
 };