1 // SPDX-License-Identifier: GPL-2.0-only
61 		return -ENOMEM;  in eps_acpi_init()
63 	if (!zalloc_cpumask_var(&eps_acpi_cpu_perf->shared_cpu_map,  in eps_acpi_init()
67 		return -ENOMEM;  in eps_acpi_init()
71 		free_cpumask_var(eps_acpi_cpu_perf->shared_cpu_map);  in eps_acpi_init()
74 		return -EIO;  in eps_acpi_init()
83 		free_cpumask_var(eps_acpi_cpu_perf->shared_cpu_map);  in eps_acpi_exit()
94 	u32 lo, hi;  in eps_get()  local
103 	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);  in eps_get()
104 	return centaur->fsb * ((lo >> 8) & 0xff);  in eps_get()
111 	u32 lo, hi;  in eps_set_state()  local
115 	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);  in eps_set_state()
119 		rdmsr(MSR_IA32_PERF_STATUS, lo, hi);  in eps_set_state()
122 			return -ENODEV;  in eps_set_state()
131 		rdmsr(MSR_IA32_PERF_STATUS, lo, hi);  in eps_set_state()
134 			return -ENODEV;  in eps_set_state()
143 	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);  in eps_set_state()
156 	unsigned int cpu = policy->cpu;  in eps_target()
161 		return -ENODEV;  in eps_target()
165 	dest_state = centaur->freq_table[index].driver_data & 0xffff;  in eps_target()
175 	u32 lo, hi;  in eps_cpu_init()  local
191 	if (policy->cpu != 0)  in eps_cpu_init()
192 		return -ENODEV;  in eps_cpu_init()
197 	switch (c->x86_model) {  in eps_cpu_init()
199 		rdmsr(0x1153, lo, hi);  in eps_cpu_init()
204 		rdmsr(0x1154, lo, hi);  in eps_cpu_init()
212 		pr_cont("C7-M\n");  in eps_cpu_init()
221 		pr_cont("C7-D\n");  in eps_cpu_init()
225 		return -ENODEV;  in eps_cpu_init()
236 			return -ENODEV;  in eps_cpu_init()
241 	rdmsr(MSR_IA32_PERF_STATUS, lo, hi);  in eps_cpu_init()
248 	max_voltage = hi & 0xff;  in eps_cpu_init()
250 	max_multiplier = (hi >> 8) & 0xff;  in eps_cpu_init()
252 	min_voltage = (hi >> 16) & 0xff;  in eps_cpu_init()
254 	min_multiplier = (hi >> 24) & 0xff;  in eps_cpu_init()
260 		return -EINVAL;  in eps_cpu_init()
263 		return -EINVAL;  in eps_cpu_init()
265 		return -EINVAL;  in eps_cpu_init()
269 		return -EINVAL;  in eps_cpu_init()
274 		pr_info("You can use freq_failsafe_off option to disable this check.\n");  in eps_cpu_init()
275 		return -EINVAL;  in eps_cpu_init()
279 		pr_info("You can use voltage_failsafe_off option to disable this check.\n");  in eps_cpu_init()
280 		return -EINVAL;  in eps_cpu_init()
283 	/* Calc FSB speed */  in eps_cpu_init()
287 	/* Check for ACPI processor speed limit */  in eps_cpu_init()
289 		if (!acpi_processor_get_bios_limit(policy->cpu, &limit)) {  in eps_cpu_init()
297 				return -EINVAL;  in eps_cpu_init()
309 		v = (set_max_voltage - 700) / 16;  in eps_cpu_init()
317 	/* Calc number of p-states supported */  in eps_cpu_init()
319 		states = max_multiplier - min_multiplier + 1;  in eps_cpu_init()
327 		return -ENOMEM;  in eps_cpu_init()
331 	centaur->fsb = fsb;  in eps_cpu_init()
333 	centaur->bios_limit = limit;  in eps_cpu_init()
337 	f_table = &centaur->freq_table[0];  in eps_cpu_init()
346 		step = ((max_voltage - min_voltage) * 256)  in eps_cpu_init()
347 			/ (max_multiplier - min_multiplier);  in eps_cpu_init()
357 	policy->cpuinfo.transition_latency = 140000; /* 844mV -> 700mV in ns */  in eps_cpu_init()
358 	policy->freq_table = &centaur->freq_table[0];  in eps_cpu_init()
365 	unsigned int cpu = policy->cpu;  in eps_cpu_exit()
394 		return -ENODEV;  in eps_init()
396 		return -EINVAL;  in eps_init()
408 MODULE_PARM_DESC(freq_failsafe_off, "Disable current vs max frequency check");
410 MODULE_PARM_DESC(voltage_failsafe_off, "Disable current vs max voltage check");
413 MODULE_PARM_DESC(ignore_acpi_limit, "Don't check ACPI's processor speed limit");
416 MODULE_PARM_DESC(set_max_voltage, "Set maximum CPU voltage (mV) C7-M only");