linux: automatically set CONFIG_PERF_EVENTS when perf is enabled
Perf profiling cannot be used if CONFIG_PERF_EVENTS is not enabled in the kernel configuration. Similar to other tools, like ktap, we can enable the right options automatically. Signed-off-by: Jan Heylen <jan.heylen@nokia.com> Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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@ -292,6 +292,8 @@ define LINUX_KCONFIG_FIXUP_CMDS
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$(call KCONFIG_ENABLE_OPT,CONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
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$(if $(BR2_PACKAGE_LINUX_TOOLS_PERF),
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$(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config))
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$(if $(BR2_PACKAGE_SYSTEMD),
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$(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
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@ -47,9 +47,11 @@ config BR2_PACKAGE_LINUX_TOOLS_PERF
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code), single CPU or severals threads.
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This will build and install the userspace 'perf'
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command. It is up to the user to ensure that the kernel
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configuration has all the suitable options enabled to allow a
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proper operation of 'perf'.
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command.
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Your kernel must have CONFIG_PERF_EVENTS enabled to use perf
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profiling. Buildroot automatically enables this in the kernel
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configuration.
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https://perf.wiki.kernel.org/
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