1 // SPDX-License-Identifier: GPL-2.0
7  * Provide interface to set MSR 620 at a granularity of per die. On CPU online,
8  * one control CPU is identified per die to read/write limit. This control CPU
10  * offline in a die then remove the sysfs object for that die.
22 #include <asm/intel-family.h>
28  * struct uncore_data -	Encapsulate all uncore data
30  *			on system resume.
33  * @control_cpu:	Designated CPU for a die to read/write
37  * settings for a die/package.
51 /* Max instances for uncore data, one for each die */
87 				 data->member_name);			\
101 	if (data->control_cpu < 0)  in uncore_read_ratio()
102 		return -ENXIO;  in uncore_read_ratio()
104 	ret = rdmsrl_on_cpu(data->control_cpu, MSR_UNCORE_RATIO_LIMIT, &cap);  in uncore_read_ratio()
123 	if (data->control_cpu < 0) {  in uncore_write_ratio()
124 		ret = -ENXIO;  in uncore_write_ratio()
130 		ret = -EINVAL;  in uncore_write_ratio()
134 	ret = rdmsrl_on_cpu(data->control_cpu, MSR_UNCORE_RATIO_LIMIT, &cap);  in uncore_write_ratio()
146 	ret = wrmsrl_on_cpu(data->control_cpu, MSR_UNCORE_RATIO_LIMIT, cap);  in uncore_write_ratio()
150 	data->stored_uncore_data = cap;  in uncore_write_ratio()
167 		return -EINVAL;  in store_min_max_freq_khz()
233 	complete(&data->kobj_unregister);  in uncore_sysfs_entry_release()
264 	if (data->valid) {  in uncore_add_die_entry()
266 		data->control_cpu = cpu;  in uncore_add_die_entry()
276 		uncore_read_ratio(data, &data->initial_min_freq_khz,  in uncore_add_die_entry()
277 				  &data->initial_max_freq_khz);  in uncore_add_die_entry()
279 		init_completion(&data->kobj_unregister);  in uncore_add_die_entry()
281 		ret = kobject_init_and_add(&data->kobj, &uncore_ktype,  in uncore_add_die_entry()
284 			data->control_cpu = cpu;  in uncore_add_die_entry()
285 			data->valid = true;  in uncore_add_die_entry()
291 /* Last CPU in this die is offline, make control cpu invalid */
299 		data->control_cpu = -1;  in uncore_remove_die_entry()
312 	/* Use this CPU on this die as a control CPU */  in uncore_event_cpu_online()
354 			if (!data || !data->valid || !data->stored_uncore_data)  in uncore_pm_notify()
358 					    data->stored_uncore_data);  in uncore_pm_notify()
390 		return -ENODEV;  in intel_uncore_init()
397 		return -ENOMEM;  in intel_uncore_init()
400 						  &cpu_subsys.dev_root->kobj);  in intel_uncore_init()
402 		ret = -ENOMEM;  in intel_uncore_init()
407 				"platform/x86/uncore-freq:online",  in intel_uncore_init()