Hey all, I'm writing about lines arch/mips/net/ebpf_jit.c:1806-1807: if (!prog->jit_requested || MIPS_ISA_REV < 2) return prog; Do pre-32R2 architectures (32R1, maybe even R3000-like) actually support this eBPF JIT code? If they do, then the condition 'MIPS_ISA_REV < 2' should be removed as it is always true for them and tells CC to remove JIT completely. If they don't support instructions from this JIT, then the line arch/mips/Kconfig:50: select HAVE_EBPF_JIT if (!CPU_MICROMIPS) should be changed to something like: select HAVE_EBPF_JIT if !CPU_MICROMIPS && TARGET_ISA_REV >= 2 (and then the mentioned 'if' condition would become redundant) At the moment it is possible to build a kernel without both JIT and interpreter, but with CONFIG_BPF_SYSCALL=y (what should not be allowed I suppose?) within the following configuration: - select any pre-32R2 CPU (e.g. CONFIG_CPU_MIPS32_R1); - enable CONFIG_BPF_JIT (CONFIG_MIPS_EBPF_JIT will be autoselected); - enable CONFIG_BPF_JIT_ALWAYS_ON (this removes BPF interpreter from the system). I may prepare a proper patch by myself if needed (after clarification). Thanks. Regards, ᚷ ᛖ ᚢ ᚦ ᚠ ᚱ
