From b664e255ba3c655a675e4e1fe9503d6f7ada3305 Mon Sep 17 00:00:00 2001 From: Tiezhu Yang Date: Tue, 22 Feb 2022 17:57:05 +0800 Subject: 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 Signed-off-by: Daniel Borkmann Acked-by: Song Liu Link: https://lore.kernel.org/bpf/1645523826-18149-2-git-send-email-yangtiezhu@loongson.cn --- kernel/bpf/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'kernel/bpf/Kconfig') 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 -- cgit v1.2.3