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Author	SHA1	Message	Date
Leon Hwang	dc8673b28b	libbpf: Add BPF_F_CPU and BPF_F_ALL_CPUS flags support for percpu maps ... Add libbpf support for the BPF_F_CPU flag for percpu maps by embedding the cpu info into the high 32 bits of: 1. **flags**: bpf_map_lookup_elem_flags(), bpf_map__lookup_elem(), bpf_map_update_elem() and bpf_map__update_elem() 2. **opts->elem_flags**: bpf_map_lookup_batch() and bpf_map_update_batch() And the flag can be BPF_F_ALL_CPUS, but cannot be 'BPF_F_CPU | BPF_F_ALL_CPUS'. Behavior: * If the flag is BPF_F_ALL_CPUS, the update is applied across all CPUs. * If the flag is BPF_F_CPU, it updates value only to the specified CPU. * If the flag is BPF_F_CPU, lookup value only from the specified CPU. * lookup does not support BPF_F_ALL_CPUS. Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Leon Hwang <leon.hwang@linux.dev> Link: https://lore.kernel.org/r/20260107022022.12843-7-leon.hwang@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2026-01-29 14:10:19 -08:00
Leon Hwang	a6d7ceaaeb	bpf: Introduce BPF_F_CPU and BPF_F_ALL_CPUS flags ... Introduce BPF_F_CPU and BPF_F_ALL_CPUS flags and check them for following APIs: * 'map_lookup_elem()' * 'map_update_elem()' * 'generic_map_lookup_batch()' * 'generic_map_update_batch()' And, get the correct value size for these APIs. Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Leon Hwang <leon.hwang@linux.dev> Link: https://lore.kernel.org/r/20260107022022.12843-2-leon.hwang@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2026-01-29 14:10:19 -08:00