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- 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
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