diff options
| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2022-02-22 17:57:05 +0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-03-01 00:28:06 +0100 |
| commit | b664e255ba3c655a675e4e1fe9503d6f7ada3305 (patch) | |
| tree | d7b036c1ff52ea54a57a05349c6017ea7f32b062 /kernel/bpf | |
| parent | 43429ea74a121683dc231d0a694bb32734caea92 (diff) | |
| download | lwn-b664e255ba3c655a675e4e1fe9503d6f7ada3305.tar.gz lwn-b664e255ba3c655a675e4e1fe9503d6f7ada3305.zip | |
bpf: Add some description about BPF_JIT_ALWAYS_ON in Kconfig
When CONFIG_BPF_JIT_ALWAYS_ON is enabled, /proc/sys/net/core/bpf_jit_enable
is permanently set to 1 and setting any other value than that will return
failure.
Add the above description in the help text of config BPF_JIT_ALWAYS_ON, and
then we can distinguish between BPF_JIT_ALWAYS_ON and BPF_JIT_DEFAULT_ON.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/1645523826-18149-2-git-send-email-yangtiezhu@loongson.cn
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/bpf/Kconfig b/kernel/bpf/Kconfig index d24d518ddd63..c3cf0b86eeb2 100644 --- a/kernel/bpf/Kconfig +++ b/kernel/bpf/Kconfig @@ -58,6 +58,10 @@ config BPF_JIT_ALWAYS_ON Enables BPF JIT and removes BPF interpreter to avoid speculative execution of BPF instructions by the interpreter. + When CONFIG_BPF_JIT_ALWAYS_ON is enabled, /proc/sys/net/core/bpf_jit_enable + is permanently set to 1 and setting any other value than that will + return failure. + config BPF_JIT_DEFAULT_ON def_bool ARCH_WANT_DEFAULT_BPF_JIT || BPF_JIT_ALWAYS_ON depends on HAVE_EBPF_JIT && BPF_JIT |