From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- tools/perf/util/cputopo.h | 78 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 tools/perf/util/cputopo.h (limited to 'tools/perf/util/cputopo.h') diff --git a/tools/perf/util/cputopo.h b/tools/perf/util/cputopo.h new file mode 100644 index 000000000..8d42f6102 --- /dev/null +++ b/tools/perf/util/cputopo.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PERF_CPUTOPO_H +#define __PERF_CPUTOPO_H + +#include + +struct cpu_topology { + /* The number of unique package_cpus_lists below. */ + u32 package_cpus_lists; + /* The number of unique die_cpu_lists below. */ + u32 die_cpus_lists; + /* The number of unique core_cpu_lists below. */ + u32 core_cpus_lists; + /* + * An array of strings where each string is unique and read from + * /sys/devices/system/cpu/cpuX/topology/package_cpus_list. From the ABI + * each of these is a human-readable list of CPUs sharing the same + * physical_package_id. The format is like 0-3, 8-11, 14,17. + */ + const char **package_cpus_list; + /* + * An array of string where each string is unique and from + * /sys/devices/system/cpu/cpuX/topology/die_cpus_list. From the ABI + * each of these is a human-readable list of CPUs within the same die. + * The format is like 0-3, 8-11, 14,17. + */ + const char **die_cpus_list; + /* + * An array of string where each string is unique and from + * /sys/devices/system/cpu/cpuX/topology/core_cpus_list. From the ABI + * each of these is a human-readable list of CPUs within the same + * core. The format is like 0-3, 8-11, 14,17. + */ + const char **core_cpus_list; +}; + +struct numa_topology_node { + char *cpus; + u32 node; + u64 mem_total; + u64 mem_free; +}; + +struct numa_topology { + u32 nr; + struct numa_topology_node nodes[]; +}; + +struct hybrid_topology_node { + char *pmu_name; + char *cpus; +}; + +struct hybrid_topology { + u32 nr; + struct hybrid_topology_node nodes[]; +}; + +/* + * The topology for online CPUs, lazily created. + */ +const struct cpu_topology *online_topology(void); + +struct cpu_topology *cpu_topology__new(void); +void cpu_topology__delete(struct cpu_topology *tp); +/* Determine from the core list whether SMT was enabled. */ +bool cpu_topology__smt_on(const struct cpu_topology *topology); +/* Are the sets of SMT siblings all enabled or all disabled in user_requested_cpus. */ +bool cpu_topology__core_wide(const struct cpu_topology *topology, + const char *user_requested_cpu_list); + +struct numa_topology *numa_topology__new(void); +void numa_topology__delete(struct numa_topology *tp); + +struct hybrid_topology *hybrid_topology__new(void); +void hybrid_topology__delete(struct hybrid_topology *tp); + +#endif /* __PERF_CPUTOPO_H */ -- cgit v1.3.1