Merge remote-tracking branch 'intel-speed-select/intel-sst' into review-ilpo

Summary of changes:
- CPU 0 hotplug support is deprecated in the upstream kernel. This
  causes failures during level change for several customers. So, add a
  silent workaround to use Cgroup v2, without user option.
- Increase number of CPUs in a single request
- Fix turbo mode enable/disable issue
- Error handling for invalid input options

tools/power/x86/intel-speed-select/isst-daemon.c

@@ -90,7 +90,8 @@ void process_level_change(struct isst_id *id)
 		if (ret)
 			goto use_offline;
 
-		isolate_cpus(id, ctdp_level.core_cpumask_size, ctdp_level.core_cpumask, pkg_dev.current_level);
+		isolate_cpus(id, ctdp_level.core_cpumask_size, ctdp_level.core_cpumask,
+			     pkg_dev.current_level, 0);
 
 		goto free_mask;
 	}

tools/power/x86/intel-speed-select/isst.h

@@ -318,7 +318,8 @@ extern struct isst_platform_ops *tpmi_get_platform_ops(void);
 
 /* Cgroup related interface */
 extern int enable_cpuset_controller(void);
-extern int isolate_cpus(struct isst_id *id, int mask_size, cpu_set_t *cpu_mask, int level);
+extern int isolate_cpus(struct isst_id *id, int mask_size, cpu_set_t *cpu_mask,
+			int level, int cpu_0_only);
 extern int use_cgroupv2(void);
 
 #endif