Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
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/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
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#pragma once
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#ifndef WRITE_ONCE
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#define WRITE_ONCE(x, val) ((*(volatile typeof(x) *) &(x)) = (val))
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#endif
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#ifndef NUMA_NO_NODE
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#define NUMA_NO_NODE (-1)
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#endif
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#ifndef arena_container_of
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#define arena_container_of(ptr, type, member) \
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({ \
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void __arena *__mptr = (void __arena *)(ptr); \
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((type *)(__mptr - offsetof(type, member))); \
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})
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#endif
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#ifdef __BPF__ /* when compiled as bpf program */
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#ifndef PAGE_SIZE
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#define PAGE_SIZE __PAGE_SIZE
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/*
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* for older kernels try sizeof(struct genradix_node)
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* or flexible:
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* static inline long __bpf_page_size(void) {
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* return bpf_core_enum_value(enum page_size_enum___l, __PAGE_SIZE___l) ?: sizeof(struct genradix_node);
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* }
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* but generated code is not great.
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*/
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#endif
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#if defined(__BPF_FEATURE_ADDR_SPACE_CAST) && !defined(BPF_ARENA_FORCE_ASM)
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#define __arena __attribute__((address_space(1)))
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#define __arena_global __attribute__((address_space(1)))
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#define cast_kern(ptr) /* nop for bpf prog. emitted by LLVM */
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#define cast_user(ptr) /* nop for bpf prog. emitted by LLVM */
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#else
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#define __arena
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#define __arena_global SEC(".addr_space.1")
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#define cast_kern(ptr) bpf_addr_space_cast(ptr, 0, 1)
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#define cast_user(ptr) bpf_addr_space_cast(ptr, 1, 0)
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#endif
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void __arena* bpf_arena_alloc_pages(void *map, void __arena *addr, __u32 page_cnt,
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int node_id, __u64 flags) __ksym __weak;
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int bpf_arena_reserve_pages(void *map, void __arena *addr, __u32 page_cnt) __ksym __weak;
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void bpf_arena_free_pages(void *map, void __arena *ptr, __u32 page_cnt) __ksym __weak;
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#define arena_base(map) ((void __arena *)((struct bpf_arena *)(map))->user_vm_start)
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#else /* when compiled as user space code */
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#define __arena
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#define __arg_arena
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#define cast_kern(ptr) /* nop for user space */
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#define cast_user(ptr) /* nop for user space */
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__weak char arena[1];
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#ifndef offsetof
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#define offsetof(type, member) ((unsigned long)&((type *)0)->member)
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#endif
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static inline void __arena* bpf_arena_alloc_pages(void *map, void *addr, __u32 page_cnt,
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int node_id, __u64 flags)
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{
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return NULL;
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}
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static inline void bpf_arena_free_pages(void *map, void __arena *ptr, __u32 page_cnt)
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{
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}
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#endif
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