![Linus Torvalds](/assets/img/avatar_default.png)
- Rework the main suspend-to-idle control flow to avoid repeating "noirq" device resume and suspend operations in case of spurious wakeups from the ACPI EC and decouple the ACPI EC wakeups support from the LPS0 _DSM support (Rafael Wysocki). - Extend the wakeup sources framework to expose wakeup sources as device objects in sysfs (Tri Vo, Stephen Boyd). - Expose system suspend statistics in sysfs (Kalesh Singh). - Introduce a new haltpoll cpuidle driver and a new matching governor for virtualized guests wanting to do guest-side polling in the idle loop (Marcelo Tosatti, Joao Martins, Wanpeng Li, Stephen Rothwell). - Fix the menu and teo cpuidle governors to allow the scheduler tick to be stopped if PM QoS is used to limit the CPU idle state exit latency in some cases (Rafael Wysocki). - Increase the resolution of the play_idle() argument to microseconds for more fine-grained injection of CPU idle cycles (Daniel Lezcano). - Switch over some users of cpuidle notifiers to the new QoS-based frequency limits and drop the CPUFREQ_ADJUST and CPUFREQ_NOTIFY policy notifier events (Viresh Kumar). - Add new cpufreq driver based on nvmem for sun50i (Yangtao Li). - Add support for MT8183 and MT8516 to the mediatek cpufreq driver (Andrew-sh.Cheng, Fabien Parent). - Add i.MX8MN support to the imx-cpufreq-dt cpufreq driver (Anson Huang). - Add qcs404 to cpufreq-dt-platdev blacklist (Jorge Ramirez-Ortiz). - Update the qcom cpufreq driver (among other things, to make it easier to extend and to use kryo cpufreq for other nvmem-based SoCs) and add qcs404 support to it (Niklas Cassel, Douglas RAILLARD, Sibi Sankar, Sricharan R). - Fix assorted issues and make assorted minor improvements in the cpufreq code (Colin Ian King, Douglas RAILLARD, Florian Fainelli, Gustavo Silva, Hariprasad Kelam). - Add new devfreq driver for NVidia Tegra20 (Dmitry Osipenko, Arnd Bergmann). - Add new Exynos PPMU events to devfreq events and extend that mechanism (Lukasz Luba). - Fix and clean up the exynos-bus devfreq driver (Kamil Konieczny). - Improve devfreq documentation and governor code, fix spelling typos in devfreq (Ezequiel Garcia, Krzysztof Kozlowski, Leonard Crestez, MyungJoo Ham, Gaël PORTAY). - Add regulators enable and disable to the OPP (operating performance points) framework (Kamil Konieczny). - Update the OPP framework to support multiple opp-suspend properties (Anson Huang). - Fix assorted issues and make assorted minor improvements in the OPP code (Niklas Cassel, Viresh Kumar, Yue Hu). - Clean up the generic power domains (genpd) framework (Ulf Hansson). - Clean up assorted pieces of power management code and documentation (Akinobu Mita, Amit Kucheria, Chuhong Yuan). - Update the pm-graph tool to version 5.5 including multiple fixes and improvements (Todd Brandt). - Update the cpupower utility (Benjamin Weis, Geert Uytterhoeven, Sébastien Szymanski). -----BEGIN PGP SIGNATURE----- iQJGBAABCAAwFiEE4fcc61cGeeHD/fCwgsRv/nhiVHEFAl2ArZ4SHHJqd0Byand5 c29ja2kubmV0AAoJEILEb/54YlRxgfYQAK80hs43vWQDmp7XKrN4pQe8+qYULAGO fBfrFl+NG9y/cnuqnt3NtA8MoyNsMMkMLkpkEDMfSbYqqH5ehEzX5+uGJWiWx8+Y oH5KU8MH7Tj/utYaalGzDt0AHfHZDIGC0NCUNQJVtE/4mOANFabwsCwscp4MrD5Q WjFN8U4BrsmWgJdZ/U9QIWcDZ0I+1etCF+rZG2yxSv31FMq2Zk/Qm4YyobqCvQFl TR9rxl08wqUmIYIz5cDjt/3AKH7NLLDqOTstbCL7cmufM5XPFc1yox69xc89UrIa 4AMgmDp7SMwFG/gdUPof0WQNmx7qxmiRAPleAOYBOZW/8jPNZk2y+RhM5NeF72m7 AFqYiuxqatkSb4IsT8fLzH9IUZOdYr8uSmoMQECw+MHdApaKFjFV8Lb/qx5+AwkD y7pwys8dZSamAjAf62eUzJDWcEwkNrujIisGrIXrVHb7ISbweskMOmdAYn9p4KgP dfRzpJBJ45IaMIdbaVXNpg3rP7Apfs7X1X+/ZhG6f+zHH3zYwr8Y81WPqX8WaZJ4 qoVCyxiVWzMYjY2/1lzjaAdqWojPWHQ3or3eBaK52DouyG3jY6hCDTLwU7iuqcCX jzAtrnqrNIKufvaObEmqcmYlIIOFT7QaJCtGUSRFQLfSon8fsVSR7LLeXoAMUJKT JWQenuNaJngK =TBDQ -----END PGP SIGNATURE----- Merge tag 'pm-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "These include a rework of the main suspend-to-idle code flow (related to the handling of spurious wakeups), a switch over of several users of cpufreq notifiers to QoS-based limits, a new devfreq driver for Tegra20, a new cpuidle driver and governor for virtualized guests, an extension of the wakeup sources framework to expose wakeup sources as device objects in sysfs, and more. Specifics: - Rework the main suspend-to-idle control flow to avoid repeating "noirq" device resume and suspend operations in case of spurious wakeups from the ACPI EC and decouple the ACPI EC wakeups support from the LPS0 _DSM support (Rafael Wysocki). - Extend the wakeup sources framework to expose wakeup sources as device objects in sysfs (Tri Vo, Stephen Boyd). - Expose system suspend statistics in sysfs (Kalesh Singh). - Introduce a new haltpoll cpuidle driver and a new matching governor for virtualized guests wanting to do guest-side polling in the idle loop (Marcelo Tosatti, Joao Martins, Wanpeng Li, Stephen Rothwell). - Fix the menu and teo cpuidle governors to allow the scheduler tick to be stopped if PM QoS is used to limit the CPU idle state exit latency in some cases (Rafael Wysocki). - Increase the resolution of the play_idle() argument to microseconds for more fine-grained injection of CPU idle cycles (Daniel Lezcano). - Switch over some users of cpuidle notifiers to the new QoS-based frequency limits and drop the CPUFREQ_ADJUST and CPUFREQ_NOTIFY policy notifier events (Viresh Kumar). - Add new cpufreq driver based on nvmem for sun50i (Yangtao Li). - Add support for MT8183 and MT8516 to the mediatek cpufreq driver (Andrew-sh.Cheng, Fabien Parent). - Add i.MX8MN support to the imx-cpufreq-dt cpufreq driver (Anson Huang). - Add qcs404 to cpufreq-dt-platdev blacklist (Jorge Ramirez-Ortiz). - Update the qcom cpufreq driver (among other things, to make it easier to extend and to use kryo cpufreq for other nvmem-based SoCs) and add qcs404 support to it (Niklas Cassel, Douglas RAILLARD, Sibi Sankar, Sricharan R). - Fix assorted issues and make assorted minor improvements in the cpufreq code (Colin Ian King, Douglas RAILLARD, Florian Fainelli, Gustavo Silva, Hariprasad Kelam). - Add new devfreq driver for NVidia Tegra20 (Dmitry Osipenko, Arnd Bergmann). - Add new Exynos PPMU events to devfreq events and extend that mechanism (Lukasz Luba). - Fix and clean up the exynos-bus devfreq driver (Kamil Konieczny). - Improve devfreq documentation and governor code, fix spelling typos in devfreq (Ezequiel Garcia, Krzysztof Kozlowski, Leonard Crestez, MyungJoo Ham, Gaël PORTAY). - Add regulators enable and disable to the OPP (operating performance points) framework (Kamil Konieczny). - Update the OPP framework to support multiple opp-suspend properties (Anson Huang). - Fix assorted issues and make assorted minor improvements in the OPP code (Niklas Cassel, Viresh Kumar, Yue Hu). - Clean up the generic power domains (genpd) framework (Ulf Hansson). - Clean up assorted pieces of power management code and documentation (Akinobu Mita, Amit Kucheria, Chuhong Yuan). - Update the pm-graph tool to version 5.5 including multiple fixes and improvements (Todd Brandt). - Update the cpupower utility (Benjamin Weis, Geert Uytterhoeven, Sébastien Szymanski)" * tag 'pm-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (126 commits) cpuidle-haltpoll: Enable kvm guest polling when dedicated physical CPUs are available cpuidle-haltpoll: do not set an owner to allow modunload cpuidle-haltpoll: return -ENODEV on modinit failure cpuidle-haltpoll: set haltpoll as preferred governor cpuidle: allow governor switch on cpuidle_register_driver() PM: runtime: Documentation: add runtime_status ABI document pm-graph: make setVal unbuffered again for python2 and python3 powercap: idle_inject: Use higher resolution for idle injection cpuidle: play_idle: Increase the resolution to usec cpuidle-haltpoll: vcpu hotplug support cpufreq: Add qcs404 to cpufreq-dt-platdev blacklist cpufreq: qcom: Add support for qcs404 on nvmem driver cpufreq: qcom: Refactor the driver to make it easier to extend cpufreq: qcom: Re-organise kryo cpufreq to use it for other nvmem based qcom socs dt-bindings: opp: Add qcom-opp bindings with properties needed for CPR dt-bindings: opp: qcom-nvmem: Support pstates provided by a power domain Documentation: cpufreq: Update policy notifier documentation cpufreq: Remove CPUFREQ_ADJUST and CPUFREQ_NOTIFY policy notifier events PM / Domains: Verify PM domain type in dev_pm_genpd_set_performance_state() PM / Domains: Simplify genpd_lookup_dev() ...
542 lines
12 KiB
C
542 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Arch specific cpu topology information
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*
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* Copyright (C) 2016, ARM Ltd.
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* Written by: Juri Lelli, ARM Ltd.
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*/
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#include <linux/acpi.h>
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#include <linux/cpu.h>
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#include <linux/cpufreq.h>
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#include <linux/device.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/sched/topology.h>
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#include <linux/cpuset.h>
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#include <linux/cpumask.h>
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#include <linux/init.h>
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#include <linux/percpu.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE;
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void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
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unsigned long max_freq)
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{
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unsigned long scale;
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int i;
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scale = (cur_freq << SCHED_CAPACITY_SHIFT) / max_freq;
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for_each_cpu(i, cpus)
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per_cpu(freq_scale, i) = scale;
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}
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DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;
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void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity)
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{
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per_cpu(cpu_scale, cpu) = capacity;
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}
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static ssize_t cpu_capacity_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct cpu *cpu = container_of(dev, struct cpu, dev);
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return sprintf(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id));
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}
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static void update_topology_flags_workfn(struct work_struct *work);
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static DECLARE_WORK(update_topology_flags_work, update_topology_flags_workfn);
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static DEVICE_ATTR_RO(cpu_capacity);
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static int register_cpu_capacity_sysctl(void)
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{
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int i;
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struct device *cpu;
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for_each_possible_cpu(i) {
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cpu = get_cpu_device(i);
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if (!cpu) {
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pr_err("%s: too early to get CPU%d device!\n",
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__func__, i);
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continue;
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}
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device_create_file(cpu, &dev_attr_cpu_capacity);
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}
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return 0;
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}
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subsys_initcall(register_cpu_capacity_sysctl);
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static int update_topology;
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int topology_update_cpu_topology(void)
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{
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return update_topology;
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}
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/*
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* Updating the sched_domains can't be done directly from cpufreq callbacks
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* due to locking, so queue the work for later.
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*/
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static void update_topology_flags_workfn(struct work_struct *work)
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{
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update_topology = 1;
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rebuild_sched_domains();
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pr_debug("sched_domain hierarchy rebuilt, flags updated\n");
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update_topology = 0;
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}
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static u32 capacity_scale;
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static u32 *raw_capacity;
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static int free_raw_capacity(void)
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{
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kfree(raw_capacity);
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raw_capacity = NULL;
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return 0;
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}
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void topology_normalize_cpu_scale(void)
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{
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u64 capacity;
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int cpu;
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if (!raw_capacity)
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return;
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pr_debug("cpu_capacity: capacity_scale=%u\n", capacity_scale);
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for_each_possible_cpu(cpu) {
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pr_debug("cpu_capacity: cpu=%d raw_capacity=%u\n",
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cpu, raw_capacity[cpu]);
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capacity = (raw_capacity[cpu] << SCHED_CAPACITY_SHIFT)
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/ capacity_scale;
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topology_set_cpu_scale(cpu, capacity);
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pr_debug("cpu_capacity: CPU%d cpu_capacity=%lu\n",
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cpu, topology_get_cpu_scale(cpu));
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}
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}
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bool __init topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu)
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{
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static bool cap_parsing_failed;
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int ret;
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u32 cpu_capacity;
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if (cap_parsing_failed)
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return false;
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ret = of_property_read_u32(cpu_node, "capacity-dmips-mhz",
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&cpu_capacity);
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if (!ret) {
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if (!raw_capacity) {
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raw_capacity = kcalloc(num_possible_cpus(),
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sizeof(*raw_capacity),
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GFP_KERNEL);
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if (!raw_capacity) {
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cap_parsing_failed = true;
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return false;
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}
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}
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capacity_scale = max(cpu_capacity, capacity_scale);
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raw_capacity[cpu] = cpu_capacity;
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pr_debug("cpu_capacity: %pOF cpu_capacity=%u (raw)\n",
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cpu_node, raw_capacity[cpu]);
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} else {
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if (raw_capacity) {
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pr_err("cpu_capacity: missing %pOF raw capacity\n",
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cpu_node);
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pr_err("cpu_capacity: partial information: fallback to 1024 for all CPUs\n");
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}
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cap_parsing_failed = true;
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free_raw_capacity();
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}
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return !ret;
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}
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#ifdef CONFIG_CPU_FREQ
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static cpumask_var_t cpus_to_visit;
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static void parsing_done_workfn(struct work_struct *work);
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static DECLARE_WORK(parsing_done_work, parsing_done_workfn);
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static int
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init_cpu_capacity_callback(struct notifier_block *nb,
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unsigned long val,
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void *data)
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{
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struct cpufreq_policy *policy = data;
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int cpu;
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if (!raw_capacity)
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return 0;
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if (val != CPUFREQ_CREATE_POLICY)
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return 0;
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pr_debug("cpu_capacity: init cpu capacity for CPUs [%*pbl] (to_visit=%*pbl)\n",
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cpumask_pr_args(policy->related_cpus),
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cpumask_pr_args(cpus_to_visit));
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cpumask_andnot(cpus_to_visit, cpus_to_visit, policy->related_cpus);
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for_each_cpu(cpu, policy->related_cpus) {
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raw_capacity[cpu] = topology_get_cpu_scale(cpu) *
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policy->cpuinfo.max_freq / 1000UL;
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capacity_scale = max(raw_capacity[cpu], capacity_scale);
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}
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if (cpumask_empty(cpus_to_visit)) {
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topology_normalize_cpu_scale();
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schedule_work(&update_topology_flags_work);
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free_raw_capacity();
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pr_debug("cpu_capacity: parsing done\n");
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schedule_work(&parsing_done_work);
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}
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return 0;
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}
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static struct notifier_block init_cpu_capacity_notifier = {
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.notifier_call = init_cpu_capacity_callback,
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};
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static int __init register_cpufreq_notifier(void)
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{
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int ret;
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/*
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* on ACPI-based systems we need to use the default cpu capacity
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* until we have the necessary code to parse the cpu capacity, so
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* skip registering cpufreq notifier.
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*/
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if (!acpi_disabled || !raw_capacity)
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return -EINVAL;
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if (!alloc_cpumask_var(&cpus_to_visit, GFP_KERNEL))
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return -ENOMEM;
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cpumask_copy(cpus_to_visit, cpu_possible_mask);
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ret = cpufreq_register_notifier(&init_cpu_capacity_notifier,
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CPUFREQ_POLICY_NOTIFIER);
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if (ret)
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free_cpumask_var(cpus_to_visit);
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return ret;
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}
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core_initcall(register_cpufreq_notifier);
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static void parsing_done_workfn(struct work_struct *work)
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{
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cpufreq_unregister_notifier(&init_cpu_capacity_notifier,
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CPUFREQ_POLICY_NOTIFIER);
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free_cpumask_var(cpus_to_visit);
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}
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#else
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core_initcall(free_raw_capacity);
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#endif
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#if defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
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static int __init get_cpu_for_node(struct device_node *node)
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{
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struct device_node *cpu_node;
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int cpu;
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cpu_node = of_parse_phandle(node, "cpu", 0);
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if (!cpu_node)
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return -1;
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cpu = of_cpu_node_to_id(cpu_node);
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if (cpu >= 0)
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topology_parse_cpu_capacity(cpu_node, cpu);
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else
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pr_crit("Unable to find CPU node for %pOF\n", cpu_node);
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of_node_put(cpu_node);
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return cpu;
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}
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static int __init parse_core(struct device_node *core, int package_id,
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int core_id)
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{
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char name[10];
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bool leaf = true;
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int i = 0;
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int cpu;
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struct device_node *t;
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do {
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snprintf(name, sizeof(name), "thread%d", i);
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t = of_get_child_by_name(core, name);
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if (t) {
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leaf = false;
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cpu = get_cpu_for_node(t);
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if (cpu >= 0) {
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cpu_topology[cpu].package_id = package_id;
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cpu_topology[cpu].core_id = core_id;
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cpu_topology[cpu].thread_id = i;
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} else {
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pr_err("%pOF: Can't get CPU for thread\n",
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t);
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of_node_put(t);
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return -EINVAL;
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}
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of_node_put(t);
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}
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i++;
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} while (t);
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cpu = get_cpu_for_node(core);
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if (cpu >= 0) {
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if (!leaf) {
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pr_err("%pOF: Core has both threads and CPU\n",
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core);
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return -EINVAL;
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}
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cpu_topology[cpu].package_id = package_id;
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cpu_topology[cpu].core_id = core_id;
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} else if (leaf) {
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pr_err("%pOF: Can't get CPU for leaf core\n", core);
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return -EINVAL;
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}
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return 0;
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}
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static int __init parse_cluster(struct device_node *cluster, int depth)
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{
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char name[10];
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bool leaf = true;
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bool has_cores = false;
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struct device_node *c;
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static int package_id __initdata;
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int core_id = 0;
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int i, ret;
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/*
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* First check for child clusters; we currently ignore any
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* information about the nesting of clusters and present the
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* scheduler with a flat list of them.
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*/
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i = 0;
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do {
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snprintf(name, sizeof(name), "cluster%d", i);
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c = of_get_child_by_name(cluster, name);
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if (c) {
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leaf = false;
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ret = parse_cluster(c, depth + 1);
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of_node_put(c);
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if (ret != 0)
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return ret;
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}
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i++;
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} while (c);
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/* Now check for cores */
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i = 0;
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do {
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snprintf(name, sizeof(name), "core%d", i);
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c = of_get_child_by_name(cluster, name);
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if (c) {
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has_cores = true;
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if (depth == 0) {
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pr_err("%pOF: cpu-map children should be clusters\n",
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c);
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of_node_put(c);
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return -EINVAL;
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}
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if (leaf) {
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ret = parse_core(c, package_id, core_id++);
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} else {
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pr_err("%pOF: Non-leaf cluster with core %s\n",
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|
cluster, name);
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
of_node_put(c);
|
|
if (ret != 0)
|
|
return ret;
|
|
}
|
|
i++;
|
|
} while (c);
|
|
|
|
if (leaf && !has_cores)
|
|
pr_warn("%pOF: empty cluster\n", cluster);
|
|
|
|
if (leaf)
|
|
package_id++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init parse_dt_topology(void)
|
|
{
|
|
struct device_node *cn, *map;
|
|
int ret = 0;
|
|
int cpu;
|
|
|
|
cn = of_find_node_by_path("/cpus");
|
|
if (!cn) {
|
|
pr_err("No CPU information found in DT\n");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* When topology is provided cpu-map is essentially a root
|
|
* cluster with restricted subnodes.
|
|
*/
|
|
map = of_get_child_by_name(cn, "cpu-map");
|
|
if (!map)
|
|
goto out;
|
|
|
|
ret = parse_cluster(map, 0);
|
|
if (ret != 0)
|
|
goto out_map;
|
|
|
|
topology_normalize_cpu_scale();
|
|
|
|
/*
|
|
* Check that all cores are in the topology; the SMP code will
|
|
* only mark cores described in the DT as possible.
|
|
*/
|
|
for_each_possible_cpu(cpu)
|
|
if (cpu_topology[cpu].package_id == -1)
|
|
ret = -EINVAL;
|
|
|
|
out_map:
|
|
of_node_put(map);
|
|
out:
|
|
of_node_put(cn);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* cpu topology table
|
|
*/
|
|
struct cpu_topology cpu_topology[NR_CPUS];
|
|
EXPORT_SYMBOL_GPL(cpu_topology);
|
|
|
|
const struct cpumask *cpu_coregroup_mask(int cpu)
|
|
{
|
|
const cpumask_t *core_mask = cpumask_of_node(cpu_to_node(cpu));
|
|
|
|
/* Find the smaller of NUMA, core or LLC siblings */
|
|
if (cpumask_subset(&cpu_topology[cpu].core_sibling, core_mask)) {
|
|
/* not numa in package, lets use the package siblings */
|
|
core_mask = &cpu_topology[cpu].core_sibling;
|
|
}
|
|
if (cpu_topology[cpu].llc_id != -1) {
|
|
if (cpumask_subset(&cpu_topology[cpu].llc_sibling, core_mask))
|
|
core_mask = &cpu_topology[cpu].llc_sibling;
|
|
}
|
|
|
|
return core_mask;
|
|
}
|
|
|
|
void update_siblings_masks(unsigned int cpuid)
|
|
{
|
|
struct cpu_topology *cpu_topo, *cpuid_topo = &cpu_topology[cpuid];
|
|
int cpu;
|
|
|
|
/* update core and thread sibling masks */
|
|
for_each_online_cpu(cpu) {
|
|
cpu_topo = &cpu_topology[cpu];
|
|
|
|
if (cpuid_topo->llc_id == cpu_topo->llc_id) {
|
|
cpumask_set_cpu(cpu, &cpuid_topo->llc_sibling);
|
|
cpumask_set_cpu(cpuid, &cpu_topo->llc_sibling);
|
|
}
|
|
|
|
if (cpuid_topo->package_id != cpu_topo->package_id)
|
|
continue;
|
|
|
|
cpumask_set_cpu(cpuid, &cpu_topo->core_sibling);
|
|
cpumask_set_cpu(cpu, &cpuid_topo->core_sibling);
|
|
|
|
if (cpuid_topo->core_id != cpu_topo->core_id)
|
|
continue;
|
|
|
|
cpumask_set_cpu(cpuid, &cpu_topo->thread_sibling);
|
|
cpumask_set_cpu(cpu, &cpuid_topo->thread_sibling);
|
|
}
|
|
}
|
|
|
|
static void clear_cpu_topology(int cpu)
|
|
{
|
|
struct cpu_topology *cpu_topo = &cpu_topology[cpu];
|
|
|
|
cpumask_clear(&cpu_topo->llc_sibling);
|
|
cpumask_set_cpu(cpu, &cpu_topo->llc_sibling);
|
|
|
|
cpumask_clear(&cpu_topo->core_sibling);
|
|
cpumask_set_cpu(cpu, &cpu_topo->core_sibling);
|
|
cpumask_clear(&cpu_topo->thread_sibling);
|
|
cpumask_set_cpu(cpu, &cpu_topo->thread_sibling);
|
|
}
|
|
|
|
void __init reset_cpu_topology(void)
|
|
{
|
|
unsigned int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
struct cpu_topology *cpu_topo = &cpu_topology[cpu];
|
|
|
|
cpu_topo->thread_id = -1;
|
|
cpu_topo->core_id = -1;
|
|
cpu_topo->package_id = -1;
|
|
cpu_topo->llc_id = -1;
|
|
|
|
clear_cpu_topology(cpu);
|
|
}
|
|
}
|
|
|
|
void remove_cpu_topology(unsigned int cpu)
|
|
{
|
|
int sibling;
|
|
|
|
for_each_cpu(sibling, topology_core_cpumask(cpu))
|
|
cpumask_clear_cpu(cpu, topology_core_cpumask(sibling));
|
|
for_each_cpu(sibling, topology_sibling_cpumask(cpu))
|
|
cpumask_clear_cpu(cpu, topology_sibling_cpumask(sibling));
|
|
for_each_cpu(sibling, topology_llc_cpumask(cpu))
|
|
cpumask_clear_cpu(cpu, topology_llc_cpumask(sibling));
|
|
|
|
clear_cpu_topology(cpu);
|
|
}
|
|
|
|
__weak int __init parse_acpi_topology(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
|
|
void __init init_cpu_topology(void)
|
|
{
|
|
reset_cpu_topology();
|
|
|
|
/*
|
|
* Discard anything that was parsed if we hit an error so we
|
|
* don't use partial information.
|
|
*/
|
|
if (parse_acpi_topology())
|
|
reset_cpu_topology();
|
|
else if (of_have_populated_dt() && parse_dt_topology())
|
|
reset_cpu_topology();
|
|
}
|
|
#endif
|