| config BR2_PACKAGE_LTTNG_MODULES |
| bool "lttng-modules" |
| depends on BR2_LINUX_KERNEL |
| depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0 |
| help |
| Linux kernel modules for the LTTng 2.x kernel tracing |
| infrastructure. |
| |
| Make sure your target kernel has the following config |
| options enabled: |
| |
| * CONFIG_MODULES: loadable module support (not strictly |
| required when built into the kernel) |
| * CONFIG_KALLSYMS: this is necessary until the few |
| required missing symbols are exported to GPL |
| modules from mainline |
| * CONFIG_HIGH_RES_TIMERS: needed for LTTng 2.x |
| clock source |
| * CONFIG_TRACEPOINTS: kernel tracepoint instrumentation |
| (enabled as a side-effect of any of the |
| perf/ftrace/blktrace instrumentation features) |
| * CONFIG_KPROBES (5.7+): use kallsyms for kernel 5.7 and |
| newer. |
| |
| The following kernel configuration options will |
| affect the features available from LTTng: |
| |
| * CONFIG_HAVE_SYSCALL_TRACEPOINTS: system call tracing |
| * CONFIG_PERF_EVENTS: performance counters |
| * CONFIG_EVENT_TRACING: needed to allow block layer tracing |
| * CONFIG_KPROBES: dynamic probes |
| * CONFIG_KRETPROBES: dynamic function entry/return probes |
| * CONFIG_KALLSYMS_ALL: state dump of mapping between block |
| device number and name |
| |
| http://lttng.org |
| |
| comment "lttng-modules needs a Linux kernel to be built" |
| depends on !BR2_LINUX_KERNEL |
| |
| comment "lttng-modules needs a toolchain w/ headers >= 3.0" |
| depends on BR2_LINUX_KERNEL |
| depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0 |
