From: Zhang Rui rui.zhang@intel.com
[ Upstream commit bfc6819e4bf56a55df6178f93241b5845ad672eb ]
CPU0/package0 is always online and the MMIO RAPL driver runs on single package systems only, so there is no need to handle CPU hotplug in it.
Always register a RAPL package device for package 0 and remove the unnecessary CPU hotplug support.
Signed-off-by: Zhang Rui rui.zhang@intel.com Reviewed-by: Srinivas Pandruvada srinivas.pandruvada@linux.intel.com Link: https://patch.msgid.link/20240930081801.28502-6-rui.zhang@intel.com [ rjw: Subject edits ] Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../int340x_thermal/processor_thermal_rapl.c | 66 +++++++------------ 1 file changed, 22 insertions(+), 44 deletions(-)
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c index e964a9375722a..f7ab1f47ca7a6 100644 --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_rapl.c @@ -19,42 +19,6 @@ static const struct rapl_mmio_regs rapl_mmio_default = { .limits[RAPL_DOMAIN_DRAM] = BIT(POWER_LIMIT2), };
-static int rapl_mmio_cpu_online(unsigned int cpu) -{ - struct rapl_package *rp; - - /* mmio rapl supports package 0 only for now */ - if (topology_physical_package_id(cpu)) - return 0; - - rp = rapl_find_package_domain_cpuslocked(cpu, &rapl_mmio_priv, true); - if (!rp) { - rp = rapl_add_package_cpuslocked(cpu, &rapl_mmio_priv, true); - if (IS_ERR(rp)) - return PTR_ERR(rp); - } - cpumask_set_cpu(cpu, &rp->cpumask); - return 0; -} - -static int rapl_mmio_cpu_down_prep(unsigned int cpu) -{ - struct rapl_package *rp; - int lead_cpu; - - rp = rapl_find_package_domain_cpuslocked(cpu, &rapl_mmio_priv, true); - if (!rp) - return 0; - - cpumask_clear_cpu(cpu, &rp->cpumask); - lead_cpu = cpumask_first(&rp->cpumask); - if (lead_cpu >= nr_cpu_ids) - rapl_remove_package_cpuslocked(rp); - else if (rp->lead_cpu == cpu) - rp->lead_cpu = lead_cpu; - return 0; -} - static int rapl_mmio_read_raw(int cpu, struct reg_action *ra) { if (!ra->reg.mmio) @@ -82,6 +46,7 @@ static int rapl_mmio_write_raw(int cpu, struct reg_action *ra) int proc_thermal_rapl_add(struct pci_dev *pdev, struct proc_thermal_device *proc_priv) { const struct rapl_mmio_regs *rapl_regs = &rapl_mmio_default; + struct rapl_package *rp; enum rapl_domain_reg_id reg; enum rapl_domain_type domain; int ret; @@ -109,25 +74,38 @@ int proc_thermal_rapl_add(struct pci_dev *pdev, struct proc_thermal_device *proc return PTR_ERR(rapl_mmio_priv.control_type); }
- ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powercap/rapl:online", - rapl_mmio_cpu_online, rapl_mmio_cpu_down_prep); - if (ret < 0) { - powercap_unregister_control_type(rapl_mmio_priv.control_type); - rapl_mmio_priv.control_type = NULL; - return ret; + /* Register a RAPL package device for package 0 which is always online */ + rp = rapl_find_package_domain(0, &rapl_mmio_priv, false); + if (rp) { + ret = -EEXIST; + goto err; + } + + rp = rapl_add_package(0, &rapl_mmio_priv, false); + if (IS_ERR(rp)) { + ret = PTR_ERR(rp); + goto err; } - rapl_mmio_priv.pcap_rapl_online = ret;
return 0; + +err: + powercap_unregister_control_type(rapl_mmio_priv.control_type); + rapl_mmio_priv.control_type = NULL; + return ret; } EXPORT_SYMBOL_GPL(proc_thermal_rapl_add);
void proc_thermal_rapl_remove(void) { + struct rapl_package *rp; + if (IS_ERR_OR_NULL(rapl_mmio_priv.control_type)) return;
- cpuhp_remove_state(rapl_mmio_priv.pcap_rapl_online); + rp = rapl_find_package_domain(0, &rapl_mmio_priv, false); + if (rp) + rapl_remove_package(rp); powercap_unregister_control_type(rapl_mmio_priv.control_type); } EXPORT_SYMBOL_GPL(proc_thermal_rapl_remove);