Messages in this thread Patch in this message | | | From | Tiezhu Yang <> | Subject | [PATCH bpf-next v3 1/2] bpf: Add some description about BPF_JIT_ALWAYS_ON in Kconfig | Date | Tue, 22 Feb 2022 17:57:05 +0800 |
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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> Acked-by: Song Liu <songliubraving@fb.com> --- kernel/bpf/Kconfig | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/bpf/Kconfig b/kernel/bpf/Kconfig index d24d518..f3db15a 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 -- 2.1.0
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