Merge pull request raspberrypi#64 from sched-ext/README

Update README, and improve build usability

Author: htejun

Makefile

@@ -1341,6 +1341,12 @@ ifneq ($(wildcard $(resolve_btfids_O)),)
 	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
 endif
 
+tools-clean-targets := sched_ext
+PHONY += $(tools-clean-targets)
+$(tools-clean-targets):
+	$(Q)$(MAKE) -sC tools $@_clean
+tools_clean: $(tools-clean-targets)
+
 # Clear a bunch of variables before executing the submake
 ifeq ($(quiet),silent_)
 tools_silent=s
@@ -1510,7 +1516,7 @@ PHONY += $(mrproper-dirs) mrproper
 $(mrproper-dirs):
 	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
 
-mrproper: clean $(mrproper-dirs)
+mrproper: clean $(mrproper-dirs) tools_clean
 	$(call cmd,rmfiles)
 	@find . $(RCS_FIND_IGNORE) \
 		\( -name '*.rmeta' \) \

tools/Makefile

@@ -29,6 +29,7 @@ help:
 	@echo '  pci                    - PCI tools'
 	@echo '  perf                   - Linux performance measurement and analysis tool'
 	@echo '  selftests              - various kernel selftests'
+	@echo '  sched_ext              - sched_ext example schedulers'
 	@echo '  bootconfig             - boot config tool'
 	@echo '  spi                    - spi tools'
 	@echo '  tmon                   - thermal monitoring and tuning tool'
@@ -92,6 +93,9 @@ perf: FORCE
 	$(Q)mkdir -p $(PERF_O) .
 	$(Q)$(MAKE) --no-print-directory -C perf O=$(PERF_O) subdir=
 
+sched_ext: FORCE
+	$(call descend,sched_ext)
+
 selftests: FORCE
 	$(call descend,testing/$@)
 
@@ -185,6 +189,9 @@ perf_clean:
 	$(Q)mkdir -p $(PERF_O) .
 	$(Q)$(MAKE) --no-print-directory -C perf O=$(PERF_O) subdir= clean
 
+sched_ext_clean:
+	$(call descend,sched_ext,clean)
+
 selftests_clean:
 	$(call descend,testing/$(@:_clean=),clean)
 
@@ -214,6 +221,7 @@ clean: acpi_clean cgroup_clean counter_clean cpupower_clean hv_clean firewire_cl
 		mm_clean bpf_clean iio_clean x86_energy_perf_policy_clean tmon_clean \
 		freefall_clean build_clean libbpf_clean libsubcmd_clean \
 		gpio_clean objtool_clean leds_clean wmi_clean pci_clean firmware_clean debugging_clean \
-		intel-speed-select_clean tracing_clean thermal_clean thermometer_clean thermal-engine_clean
+		intel-speed-select_clean tracing_clean thermal_clean thermometer_clean thermal-engine_clean \
+		sched_ext_clean
 
 .PHONY: FORCE

tools/sched_ext/.gitignore

@@ -7,3 +7,4 @@ scx_userland
 *.skel.h
 *.subskel.h
 /tools/
+build/

tools/sched_ext/Kconfig

@@ -0,0 +1,9 @@
+CONFIG_BPF=y
+CONFIG_SCHED_CLASS_EXT=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_JIT=y
+CONFIG_DEBUG_INFO_BTF=y
+CONFIG_BPF_JIT_ALWAYS_ON=y
+CONFIG_BPF_JIT_DEFAULT_ON=y
+CONFIG_PAHOLE_HAS_SPLIT_BTF=y
+CONFIG_PAHOLE_HAS_BTF_TAG=y

tools/sched_ext/Makefile

@@ -228,6 +228,9 @@ clean:
 	rm -f *.o *.bpf.o *.skel.h *.subskel.h
 	rm -f scx_simple scx_qmap scx_central scx_pair scx_flatcg scx_userland
 
+fullclean: clean
+	$(Q)$(MAKE) -sC ../../ clean
+
 help:
 	@echo  'Building targets:'
 	@echo  '  all		  - Compile all schedulers'
@@ -282,8 +285,12 @@ help:
 	@echo  'Cleaning targets:'
 	@echo  '  clean		  - Remove all generated files, including intermediate'
 	@echo  '                    rust files for rust schedulers.'
+	@echo  ''
+	@echo  '  fullclean	  - Remove all generated files, including intermediate'
+	@echo  '                    rust files for rust schedulers, and also trigger a'
+	@echo  '                    clean of the kernel at the root of the whole repository.'
 
-.PHONY: all scx_rusty clean help
+.PHONY: all scx_rusty clean fullclean help
 
 # delete failed targets
 .DELETE_ON_ERROR: