On 2/11/22 9:57 AM, Tiezhu Yang wrote:
When CONFIG_BPF_JIT_ALWAYS_ON is enabled, bpf_jit_enable is permanently
set to 1 and setting any other value than that will return in failure.
Add the above description in the help text of 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@xxxxxxxxxxx>
---
kernel/bpf/Kconfig | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/bpf/Kconfig b/kernel/bpf/Kconfig
index d24d518..88409f8 100644
--- a/kernel/bpf/Kconfig
+++ b/kernel/bpf/Kconfig
@@ -58,6 +58,9 @@ 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, bpf_jit_enable is permanently
+ set to 1 and setting any other value than that will return in failure.
Small nit here: lets use the full path (/proc/sys/net/core/bpf_jit_enable) in order
to be consistent with the other descriptions in this Kconfig.
config BPF_JIT_DEFAULT_ON
def_bool ARCH_WANT_DEFAULT_BPF_JIT || BPF_JIT_ALWAYS_ON
depends on HAVE_EBPF_JIT && BPF_JIT
