| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | /* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */ |
| 3 | #include <vmlinux.h> |
| 4 | #include <bpf/bpf_tracing.h> |
| 5 | #include <bpf/bpf_helpers.h> |
| 6 | #include "bpf_misc.h" |
| 7 | #include "bpf_arena_spin_lock.h" |
| 8 | |
| 9 | struct { |
| 10 | __uint(type, BPF_MAP_TYPE_ARENA); |
| 11 | __uint(map_flags, BPF_F_MMAPABLE); |
| 12 | __uint(max_entries, 100); /* number of pages */ |
| 13 | #ifdef __TARGET_ARCH_arm64 |
| 14 | __ulong(map_extra, 0x1ull << 32); /* start of mmap() region */ |
| 15 | #else |
| 16 | __ulong(map_extra, 0x1ull << 44); /* start of mmap() region */ |
| 17 | #endif |
| 18 | } arena SEC(".maps"); |
| 19 | |
| 20 | int cs_count; |
| 21 | |
| 22 | #if defined(ENABLE_ATOMICS_TESTS) && defined(__BPF_FEATURE_ADDR_SPACE_CAST) |
| 23 | arena_spinlock_t __arena lock; |
| 24 | int test_skip = 1; |
| 25 | #else |
| 26 | int test_skip = 2; |
| 27 | #endif |
| 28 | |
| 29 | int counter; |
| 30 | int limit; |
| 31 | |
| 32 | SEC("tc") |
| 33 | int prog(void *ctx) |
| 34 | { |
| 35 | int ret = -2; |
| 36 | |
| 37 | #if defined(ENABLE_ATOMICS_TESTS) && defined(__BPF_FEATURE_ADDR_SPACE_CAST) |
| 38 | unsigned long flags; |
| 39 | |
| 40 | if ((ret = arena_spin_lock_irqsave(&lock, flags))) |
| 41 | return ret; |
| 42 | if (counter != limit) |
| 43 | counter++; |
| 44 | bpf_repeat(cs_count); |
| 45 | ret = 0; |
| 46 | arena_spin_unlock_irqrestore(&lock, flags); |
| 47 | #endif |
| 48 | return ret; |
| 49 | } |
| 50 | |
| 51 | char _license[] SEC("license") = "GPL"; |
| 52 |