"LARGE_INSN_LIMIT");
}
+/*
+ * Probe for bounded loop support introduced in commit 2589726d12a1
+ * ("bpf: introduce bounded loops").
+ */
+static void
+probe_bounded_loops(const char *define_prefix, __u32 ifindex)
+{
+ struct bpf_insn insns[4] = {
+ BPF_MOV64_IMM(BPF_REG_0, 10),
+ BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 1),
+ BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, -2),
+ BPF_EXIT_INSN()
+ };
+
+ probe_misc_feature(insns, ARRAY_SIZE(insns),
+ define_prefix, ifindex,
+ "have_bounded_loops",
+ "Bounded loop support",
+ "BOUNDED_LOOPS");
+}
+
static void
section_system_config(enum probe_component target, const char *define_prefix)
{
"/*** eBPF misc features ***/",
define_prefix);
probe_large_insn_limit(define_prefix, ifindex);
+ probe_bounded_loops(define_prefix, ifindex);
print_end_section();
}