#ifndef _LINUX_STOP_MACHINE #define _LINUX_STOP_MACHINE #include #include #include #include /* * stop_cpu[s]() is simplistic per-cpu maximum priority cpu * monopolization mechanism. The caller can specify a non-sleeping * function to be executed on a single or multiple cpus preempting all * other processes and monopolizing those cpus until it finishes. * * Resources for this mechanism are preallocated when a cpu is brought * up and requests are guaranteed to be served as long as the target * cpus are online. */ typedef int (*cpu_stop_fn_t)(void *arg); #ifdef CONFIG_SMP struct cpu_stop_work { struct list_head list; /* cpu_stopper->works */ cpu_stop_fn_t fn; void *arg; struct cpu_stop_done *done; }; int stop_one_cpu(unsigned int cpu, cpu_stop_fn_t fn, void *arg); void stop_one_cpu_nowait(unsigned int cpu, cpu_stop_fn_t fn, void *arg, struct cpu_stop_work *work_buf); int stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg); int try_stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg); #else /* CONFIG_SMP */ #include struct cpu_stop_work { struct work_struct work; cpu_stop_fn_t fn; void *arg; }; static inline int stop_one_cpu(unsigned int cpu, cpu_stop_fn_t fn, void *arg) { int ret = -ENOENT; preempt_disable(); if (cpu == smp_processor_id()) ret = fn(arg); preempt_enable(); return ret; } static void stop_one_cpu_nowait_workfn(struct work_struct *work) { struct cpu_stop_work *stwork = container_of(work, struct cpu_stop_work, work); preempt_disable(); stwork->fn(stwork->arg); preempt_enable(); } static inline void stop_one_cpu_nowait(unsigned int cpu, cpu_stop_fn_t fn, void *arg, struct cpu_stop_work *work_buf) { if (cpu == smp_processor_id()) { INIT_WORK(&work_buf->work, stop_one_cpu_nowait_workfn); work_buf->fn = fn; work_buf->arg = arg; schedule_work(&work_buf->work); } } static inline int stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg) { if (cpumask_test_cpu(raw_smp_processor_id(), cpumask)) return stop_one_cpu(raw_smp_processor_id(), fn, arg); return -ENOENT; } static inline int try_stop_cpus(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg) { return stop_cpus(cpumask, fn, arg); } #endif /* CONFIG_SMP */ /* * stop_machine "Bogolock": stop the entire machine, disable * interrupts. This is a very heavy lock, which is equivalent to * grabbing every spinlock (and more). So the "read" side to such a * lock is anything which disables preemption. */ #if defined(CONFIG_STOP_MACHINE) && defined(CONFIG_SMP) /** * stop_machine: freeze the machine on all CPUs and run this function * @fn: the function to run * @data: the data ptr for the @fn() * @cpus: the cpus to run the @fn() on (NULL = any online cpu) * * Description: This causes a thread to be scheduled on every cpu, * each of which disables interrupts. The result is that no one is * holding a spinlock or inside any other preempt-disabled region when * @fn() runs. * * This can be thought of as a very heavy write lock, equivalent to * grabbing every spinlock in the kernel. */ int stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus); /** * __stop_machine: freeze the machine on all CPUs and run this function * @fn: the function to run * @data: the data ptr for the @fn * @cpus: the cpus to run the @fn() on (NULL = any online cpu) * * Description: This is a special version of the above, which assumes cpus * won't come or go while it's being called. Used by hotplug cpu. */ int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus); int stop_machine_from_inactive_cpu(int (*fn)(void *), void *data, const struct cpumask *cpus); #else /* CONFIG_STOP_MACHINE && CONFIG_SMP */ static inline int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus) { unsigned long flags; int ret; local_irq_save(flags); ret = fn(data); local_irq_restore(flags); return ret; } static inline int stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus) { return __stop_machine(fn, data, cpus); } static inline int stop_machine_from_inactive_cpu(int (*fn)(void *), void *data, const struct cpumask *cpus) { return __stop_machine(fn, data, cpus); } #endif /* CONFIG_STOP_MACHINE && CONFIG_SMP */ #endif /* _LINUX_STOP_MACHINE */ y'>linux-4.6.y Hosts the 0x221E linux distro kernel.Ubuntu
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path: root/tools/testing/selftests/bpf/prog_tests/btf.c
AgeCommit message (Expand)Author
2023-05-30selftests/bpf: Add a test where map key_type_id with decl_tag typeYonghong Song
2023-03-06selftests/bpf: check that modifier resolves after pointerLorenz Bauer
2023-02-16selftests/bpf: Use bpf_{btf,link,map,prog}_get_info_by_fd()Ilya Leoshkevich
2022-11-24selftests/bpf: Add reproducer for decl_tag in func_proto argumentStanislav Fomichev
2022-11-09selftests/bpf: Tests for btf_dedup_resolve_fwdsEduard Zingerman
2022-11-04selftests/bpf: Tests for enum fwd resolved as full enum64Eduard Zingerman
2022-10-17selftests/bpf: Add reproducer for decl_tag in func_proto return typeStanislav Fomichev
2022-09-02selftests/bpf: Store BPF object files with .bpf.o extensionDaniel Müller
2022-07-19selftests/bpf: fix a test for snprintf() overflowDan Carpenter
2022-06-28selftests/bpf: remove last tests with legacy BPF map definitionsAndrii Nakryiko
2022-06-20selftests/bpf: allow BTF specs and func infos in test_verifier testsEduard Zingerman
2022-06-07selftests/bpf: Test BTF_KIND_ENUM64 for deduplicationYonghong Song
2022-06-07selftests/bpf: Add BTF_KIND_ENUM64 unit testsYonghong Song
2022-06-07selftests/bpf: Fix selftests failureYonghong Song
2022-04-19selftests/bpf: Add tests for type tag order validationKumar Kartikeya Dwivedi
2022-04-10selftests/bpf: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCKYafang Shao
2022-02-15selftests/bpf: Fix GCC11 compiler warnings in -O2 modeAndrii Nakryiko
2022-02-07selftests/bpf: Fix strict mode calculationMauricio Vásquez
2022-02-03selftests/bpf: Add a selftest for invalid func btf with btf decl_tagYonghong Song
2022-01-20libbpf: deprecate legacy BPF map definitionsAndrii Nakryiko
2021-12-14selftests/bpf: Remove explicit setrlimit(RLIMIT_MEMLOCK) in main selftestsAndrii Nakryiko
2021-12-10selftests/bpf: Replace all uses of bpf_load_btf() with bpf_btf_load()Andrii Nakryiko
2021-11-25selftests/bpf: Migrate selftests to bpf_map_create()Andrii Nakryiko
2021-11-16selftests/bpf: Add a dedup selftest with equivalent structure typesYonghong Song
2021-11-11selftests/bpf: Test BTF_KIND_DECL_TAG for deduplicationYonghong Song
2021-11-11selftests/bpf: Add BTF_KIND_TYPE_TAG unit testsYonghong Song
2021-11-11libbpf: Turn btf_dedup_opts into OPTS-based structAndrii Nakryiko
2021-11-07selftests/bpf: Free inner strings index in btf selftestAndrii Nakryiko
2021-10-22selftests/bpf: Test deduplication for BTF_KIND_DECL_TAG typedefYonghong Song
2021-10-22selftests/bpf: Add BTF_KIND_DECL_TAG typedef unit testsYonghong Song
2021-10-22selftests/bpf: Switch to new btf__type_cnt/btf__raw_data APIsHengqi Chen