1 // SPDX-License-Identifier: GPL-2.0-only
27 #include <asm/intel-family.h>
60 /* Handles CPU hotplug on multi-socket systems.
65  * per-domain level.
69 	struct rapl_package *rp;  in rapl_cpu_online()  local
71 	rp = rapl_find_package_domain(cpu, rapl_msr_priv);  in rapl_cpu_online()
72 	if (!rp) {  in rapl_cpu_online()
73 		rp = rapl_add_package(cpu, rapl_msr_priv);  in rapl_cpu_online()
74 		if (IS_ERR(rp))  in rapl_cpu_online()
75 			return PTR_ERR(rp);  in rapl_cpu_online()
77 	cpumask_set_cpu(cpu, &rp->cpumask);  in rapl_cpu_online()
83 	struct rapl_package *rp;  in rapl_cpu_down_prep()  local
86 	rp = rapl_find_package_domain(cpu, rapl_msr_priv);  in rapl_cpu_down_prep()
87 	if (!rp)  in rapl_cpu_down_prep()
90 	cpumask_clear_cpu(cpu, &rp->cpumask);  in rapl_cpu_down_prep()
91 	lead_cpu = cpumask_first(&rp->cpumask);  in rapl_cpu_down_prep()
93 		rapl_remove_package(rp);  in rapl_cpu_down_prep()
94 	else if (rp->lead_cpu == cpu)  in rapl_cpu_down_prep()
95 		rp->lead_cpu = lead_cpu;  in rapl_cpu_down_prep()
101 	u32 msr = (u32)ra->reg;  in rapl_msr_read_raw()
103 	if (rdmsrl_safe_on_cpu(cpu, msr, &ra->value)) {  in rapl_msr_read_raw()
104 		pr_debug("failed to read msr 0x%x on cpu %d\n", msr, cpu);  in rapl_msr_read_raw()
105 		return -EIO;  in rapl_msr_read_raw()
107 	ra->value &= ra->mask;  in rapl_msr_read_raw()
114 	u32 msr = (u32)ra->reg;  in rapl_msr_update_func()
117 	ra->err = rdmsrl_safe(msr, &val);  in rapl_msr_update_func()
118 	if (ra->err)  in rapl_msr_update_func()
121 	val &= ~ra->mask;  in rapl_msr_update_func()
122 	val |= ra->value;  in rapl_msr_update_func()
124 	ra->err = wrmsrl_safe(msr, val);  in rapl_msr_update_func()
135 	return ra->err;  in rapl_msr_write_raw()
163 		pr_err("intel-rapl does not support CPU vendor %d\n", boot_cpu_data.x86_vendor);  in rapl_msr_probe()
164 		return -ENODEV;  in rapl_msr_probe()
166 	rapl_msr_priv->read_raw = rapl_msr_read_raw;  in rapl_msr_probe()
167 	rapl_msr_priv->write_raw = rapl_msr_write_raw;  in rapl_msr_probe()
170 		rapl_msr_priv->limits[RAPL_DOMAIN_PACKAGE] = 3;  in rapl_msr_probe()
171 		rapl_msr_priv->regs[RAPL_DOMAIN_PACKAGE][RAPL_DOMAIN_REG_PL4] =  in rapl_msr_probe()
176 	rapl_msr_priv->control_type = powercap_register_control_type(NULL, "intel-rapl", NULL);  in rapl_msr_probe()
177 	if (IS_ERR(rapl_msr_priv->control_type)) {  in rapl_msr_probe()
179 		return PTR_ERR(rapl_msr_priv->control_type);  in rapl_msr_probe()
186 	rapl_msr_priv->pcap_rapl_online = ret;  in rapl_msr_probe()
192 		powercap_unregister_control_type(rapl_msr_priv->control_type);  in rapl_msr_probe()
198 	cpuhp_remove_state(rapl_msr_priv->pcap_rapl_online);  in rapl_msr_remove()
199 	powercap_unregister_control_type(rapl_msr_priv->control_type);  in rapl_msr_remove()