bpftrace is a high-level tracing language for Linux enhanced Berkeley Packet Filter (eBPF) available in recent Linux kernels (4.x). bpftrace uses LLVM as a backend to compile scripts to BPF-bytecode and makes use of BCC for interacting with the Linux BPF system, as well as existing Linux tracing capabilities: kernel dynamic tracing (kprobes), user-level dynamic tracing (uprobes), and tracepoints. According to Linux Kernel Requirements in bpftrace/INSTALL.md [1], the kernel needs to be built with the following options: CONFIG_BPF=y CONFIG_BPF_SYSCALL=y CONFIG_BPF_JIT=y CONFIG_HAVE_EBPF_JIT=y CONFIG_BPF_EVENTS=y CONFIG_FTRACE_SYSCALLS=y CONFIG_FUNCTION_TRACER=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_DYNAMIC_FTRACE=y CONFIG_HAVE_KPROBES=y CONFIG_KPROBES=y CONFIG_KPROBE_EVENTS=y CONFIG_ARCH_SUPPORTS_UPROBES=y CONFIG_UPROBES=y CONFIG_UPROBE_EVENTS=y CONFIG_DEBUG_FS=y So enable some missed configs in loongson3_defconfig to make sure the above configs are set after make loongson3_defconfig. [1] https://github.com/iovisor/bpftrace/blob/master/INSTALL.md Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx> --- arch/mips/configs/loongson3_defconfig | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/mips/configs/loongson3_defconfig b/arch/mips/configs/loongson3_defconfig index 0e79f81..1b8f693 100644 --- a/arch/mips/configs/loongson3_defconfig +++ b/arch/mips/configs/loongson3_defconfig @@ -26,6 +26,7 @@ CONFIG_SCHED_AUTOGROUP=y CONFIG_SYSFS_DEPRECATED=y CONFIG_RELAY=y CONFIG_BLK_DEV_INITRD=y +CONFIG_BPF_SYSCALL=y CONFIG_EMBEDDED=y CONFIG_PERF_EVENTS=y CONFIG_MACH_LOONGSON64=y @@ -40,6 +41,7 @@ CONFIG_MIPS32_N32=y CONFIG_VIRTUALIZATION=y CONFIG_KVM=m CONFIG_KVM_MIPS_VZ=y +CONFIG_KPROBES=y CONFIG_MODULES=y CONFIG_MODULE_FORCE_LOAD=y CONFIG_MODULE_UNLOAD=y @@ -129,6 +131,7 @@ CONFIG_L2TP=m CONFIG_BRIDGE=m CONFIG_VSOCKETS=m CONFIG_VIRTIO_VSOCKETS=m +CONFIG_BPF_JIT=y CONFIG_CFG80211=m CONFIG_CFG80211_WEXT=y CONFIG_MAC80211=m @@ -405,8 +408,10 @@ CONFIG_CRYPTO_DEFLATE=m CONFIG_PRINTK_TIME=y CONFIG_STRIP_ASM_SYMS=y CONFIG_MAGIC_SYSRQ=y +CONFIG_DEBUG_FS=y # CONFIG_SCHED_DEBUG is not set # CONFIG_DEBUG_PREEMPT is not set -# CONFIG_FTRACE is not set +CONFIG_FUNCTION_TRACER=y +CONFIG_FTRACE_SYSCALLS=y CONFIG_CMDLINE_BOOL=y CONFIG_CMDLINE="ieee754=relaxed" -- 2.1.0
