hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICA1GK -------------------------------- Add a kfunc (for x86 in this patch) to get arch-related flags and their string representation. Signed-off-by: GONG Ruiqi <gongruiqi1@huawei.com> --- arch/x86/kernel/cpu/bpf-rvi.c | 39 +++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/arch/x86/kernel/cpu/bpf-rvi.c b/arch/x86/kernel/cpu/bpf-rvi.c index d07d4cc758a9..dc71657623ed 100644 --- a/arch/x86/kernel/cpu/bpf-rvi.c +++ b/arch/x86/kernel/cpu/bpf-rvi.c @@ -118,3 +118,42 @@ static int __init cpuinfo_iter_init(void) return bpf_iter_reg_target(&cpuinfo_x86_reg_info); } late_initcall(cpuinfo_iter_init); + +enum arch_flags_type { + X86_CAP, + X86_BUG, + X86_POWER, + X86_POWER_SIZE, +}; + +__bpf_kfunc const char *bpf_arch_flags(enum arch_flags_type t, int i) +{ + switch (t) { + case X86_CAP: + return x86_cap_flags[i]; + case X86_BUG: + return x86_bug_flags[i]; + case X86_POWER: + return x86_power_flags[i]; + case X86_POWER_SIZE: + return (void *)ARRAY_SIZE(x86_power_flags); + default: + return NULL; + } +} + +BTF_SET8_START(bpf_arch_flags_kfunc_ids) +BTF_ID_FLAGS(func, bpf_arch_flags) +BTF_SET8_END(bpf_arch_flags_kfunc_ids) + +static const struct btf_kfunc_id_set bpf_arch_flags_kfunc_set = { + .owner = THIS_MODULE, + .set = &bpf_arch_flags_kfunc_ids, +}; + +static int __init bpf_arch_flags_kfunc_init(void) +{ + return register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, + &bpf_arch_flags_kfunc_set); +} +late_initcall(bpf_arch_flags_kfunc_init); -- 2.25.1