1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates. 4 * Copyright (c) 2024 Tejun Heo <tj@kernel.org> 5 * Copyright (c) 2024 David Vernet <dvernet@meta.com> 6 */ 7 #ifndef __SCX_COMPAT_BPF_H 8 #define __SCX_COMPAT_BPF_H 9 10 #define __COMPAT_ENUM_OR_ZERO(__type, __ent) \ 11 ({ \ 12 __type __ret = 0; \ 13 if (bpf_core_enum_value_exists(__type, __ent)) \ 14 __ret = __ent; \ 15 __ret; \ 16 }) 17 18 /* v6.12: 819513666966 ("sched_ext: Add cgroup support") */ 19 #define __COMPAT_scx_bpf_task_cgroup(p) \ 20 (bpf_ksym_exists(scx_bpf_task_cgroup) ? \ 21 scx_bpf_task_cgroup((p)) : NULL) 22 23 /* v6.12: 4c30f5ce4f7a ("sched_ext: Implement scx_bpf_dispatch[_vtime]_from_dsq()") */ 24 #define __COMPAT_scx_bpf_dispatch_from_dsq_set_slice(it, slice) \ 25 (bpf_ksym_exists(scx_bpf_dispatch_from_dsq_set_slice) ? \ 26 scx_bpf_dispatch_from_dsq_set_slice((it), (slice)) : (void)0) 27 #define __COMPAT_scx_bpf_dispatch_from_dsq_set_vtime(it, vtime) \ 28 (bpf_ksym_exists(scx_bpf_dispatch_from_dsq_set_vtime) ? \ 29 scx_bpf_dispatch_from_dsq_set_vtime((it), (vtime)) : (void)0) 30 #define __COMPAT_scx_bpf_dispatch_from_dsq(it, p, dsq_id, enq_flags) \ 31 (bpf_ksym_exists(scx_bpf_dispatch_from_dsq) ? \ 32 scx_bpf_dispatch_from_dsq((it), (p), (dsq_id), (enq_flags)) : false) 33 #define __COMPAT_scx_bpf_dispatch_vtime_from_dsq(it, p, dsq_id, enq_flags) \ 34 (bpf_ksym_exists(scx_bpf_dispatch_vtime_from_dsq) ? \ 35 scx_bpf_dispatch_vtime_from_dsq((it), (p), (dsq_id), (enq_flags)) : false) 36 37 /* 38 * Define sched_ext_ops. This may be expanded to define multiple variants for 39 * backward compatibility. See compat.h::SCX_OPS_LOAD/ATTACH(). 40 */ 41 #define SCX_OPS_DEFINE(__name, ...) \ 42 SEC(".struct_ops.link") \ 43 struct sched_ext_ops __name = { \ 44 __VA_ARGS__, \ 45 }; 46 47 #endif /* __SCX_COMPAT_BPF_H */ 48