hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICA1GK -------------------------------- Add a kfunc (for arm64 in this patch) to get arch-related flags and their string representation. Signed-off-by: GONG Ruiqi <gongruiqi1@huawei.com> --- arch/arm64/kernel/bpf-rvi.c | 45 +++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/arch/arm64/kernel/bpf-rvi.c b/arch/arm64/kernel/bpf-rvi.c index c6590704e3a6..5b86a1f4a26e 100644 --- a/arch/arm64/kernel/bpf-rvi.c +++ b/arch/arm64/kernel/bpf-rvi.c @@ -165,3 +165,48 @@ static int __init cpuinfo_iter_init(void) return bpf_iter_reg_target(&cpuinfo_arm64_reg_info); } late_initcall(cpuinfo_iter_init); + +enum arch_flags_type { + ARM64_HWCAP, + ARM64_HWCAP_SIZE, + ARM64_COMPAT_HWCAP, + ARM64_COMPAT_HWCAP_SIZE, + ARM64_COMPAT_HWCAP2, + ARM64_COMPAT_HWCAP2_SIZE, +}; + +__bpf_kfunc const char *bpf_arch_flags(enum arch_flags_type t, int i) +{ + switch (t) { + case ARM64_HWCAP: + return hwcap_str[i]; + case ARM64_HWCAP_SIZE: + return (void *)ARRAY_SIZE(hwcap_str); + case ARM64_COMPAT_HWCAP: + return compat_hwcap_str[i]; + case ARM64_COMPAT_HWCAP_SIZE: + return (void *)ARRAY_SIZE(compat_hwcap_str); + case ARM64_COMPAT_HWCAP2: + return compat_hwcap2_str[i]; + case ARM64_COMPAT_HWCAP2_SIZE: + return (void *)ARRAY_SIZE(compat_hwcap2_str); + 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