diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index a3144a3..79c5e97 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -47,29 +47,47 @@ override LDFLAGS =
 override MAKEFLAGS =
 endif
 
+ifeq ($(O)$(KBUILD_OUTPUT),)
+        BUILD :=$(shell pwd)
+else
+        ifneq ($(O),)
+                BUILD := $(O)
+        else
+                ifneq ($(KBUILD_OUTPUT),)
+                        BUILD := $(KBUILD_OUTPUT)
+                endif
+        endif
+endif
+export BUILD
 all:
-	for TARGET in $(TARGETS); do \
-		make -C $$TARGET; \
+	for TARGET in $(TARGETS); do		\
+		BUILD_TARGET=$$BUILD/$$TARGET;	\
+		mkdir $$BUILD_TARGET  -p;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET;\
 	done;
 
 run_tests: all
 	for TARGET in $(TARGETS); do \
-		make -C $$TARGET run_tests; \
+		BUILD_TARGET=$$BUILD/$$TARGET;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET run_tests;\
 	done;
 
 hotplug:
 	for TARGET in $(TARGETS_HOTPLUG); do \
-		make -C $$TARGET; \
+		BUILD_TARGET=$$BUILD/$$TARGET;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET;\
 	done;
 
 run_hotplug: hotplug
 	for TARGET in $(TARGETS_HOTPLUG); do \
-		make -C $$TARGET run_full_test; \
+		BUILD_TARGET=$$BUILD/$$TARGET;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET run_full_test;\
 	done;
 
 clean_hotplug:
 	for TARGET in $(TARGETS_HOTPLUG); do \
-		make -C $$TARGET clean; \
+		BUILD_TARGET=$$BUILD/$$TARGET;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET clean;\
 	done;
 
 run_pstore_crash:
@@ -84,7 +102,8 @@ ifdef INSTALL_PATH
 	@# Ask all targets to install their files
 	mkdir -p $(INSTALL_PATH)
 	for TARGET in $(TARGETS); do \
-		make -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \
+		BUILD_TARGET=$$BUILD/$$TARGET;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \
 	done;
 
 	@# Ask all targets to emit their test scripts
@@ -93,10 +112,11 @@ ifdef INSTALL_PATH
 	echo "ROOT=\$$PWD" >> $(ALL_SCRIPT)
 
 	for TARGET in $(TARGETS); do \
+		BUILD_TARGET=$$BUILD/$$TARGET;	\
 		echo "echo ; echo Running tests in $$TARGET" >> $(ALL_SCRIPT); \
 		echo "echo ========================================" >> $(ALL_SCRIPT); \
 		echo "cd $$TARGET" >> $(ALL_SCRIPT); \
-		make -s --no-print-directory -C $$TARGET emit_tests >> $(ALL_SCRIPT); \
+		make -s --no-print-directory OUTPUT=$$BUILD_TARGET/ -C $$TARGET emit_tests >> $(ALL_SCRIPT); \
 		echo "cd \$$ROOT" >> $(ALL_SCRIPT); \
 	done;
 
@@ -107,7 +127,8 @@ endif
 
 clean:
 	for TARGET in $(TARGETS); do \
-		make -C $$TARGET clean; \
+		BUILD_TARGET=$$BUILD/$$TARGET;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET clean;\
 	done;
 
 .PHONY: install
diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
index 48d1f86..fe5cdec 100644
--- a/tools/testing/selftests/exec/Makefile
+++ b/tools/testing/selftests/exec/Makefile
@@ -5,18 +5,19 @@ TEST_GEN_FILES := execveat.symlink execveat.denatured script subdir
 # Makefile is a run-time dependency, since it's accessed by the execveat test
 TEST_FILES := Makefile
 
-EXTRA_CLEAN := subdir.moved execveat.moved xxxxx*
+EXTRA_CLEAN := $(OUTPUT)subdir.moved $(OUTPUT)execveat.moved $(OUTPUT)xxxxx*
 
 include ../lib.mk
 
-subdir:
+$(OUTPUT)subdir:
 	mkdir -p $@
-script:
+$(OUTPUT)script:
 	echo '#!/bin/sh' > $@
 	echo 'exit $$*' >> $@
 	chmod +x $@
-execveat.symlink: execveat
-	ln -s -f $< $@
-execveat.denatured: execveat
+$(OUTPUT)execveat.symlink: execveat
+	cd $(OUTPUT) && ln -s -f $< `basename $@`
+$(OUTPUT)execveat.denatured: execveat
 	cp $< $@
 	chmod -x $@
+
diff --git a/tools/testing/selftests/ftrace/Makefile b/tools/testing/selftests/ftrace/Makefile
index 6c64b42..33bb29b 100644
--- a/tools/testing/selftests/ftrace/Makefile
+++ b/tools/testing/selftests/ftrace/Makefile
@@ -2,6 +2,6 @@ all:
 
 TEST_PROGS := ftracetest
 TEST_FILES := test.d
-EXTRA_CLEAN := logs/*
+EXTRA_CLEAN := $(OUTPUT)logs/*
 
 include ../lib.mk
diff --git a/tools/testing/selftests/futex/Makefile b/tools/testing/selftests/futex/Makefile
index 6a17529..12a3ae2 100644
--- a/tools/testing/selftests/futex/Makefile
+++ b/tools/testing/selftests/futex/Makefile
@@ -3,13 +3,18 @@ SUBDIRS := functional
 TEST_PROGS := run.sh
 
 .PHONY: all clean
-all:
-	for DIR in $(SUBDIRS); do $(MAKE) -C $$DIR $@ ; done
 
 include ../lib.mk
 
+all:
+	for DIR in $(SUBDIRS); do		\
+		BUILD_TARGET=$$OUTPUT/$$DIR;	\
+		mkdir $$BUILD_TARGET  -p;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$DIR $@;\
+	done
+
 override define RUN_TESTS
-	./run.sh
+	@if [ `dirname $(OUTPUT)` = $(PWD) ]; then ./run.sh; fi
 endef
 
 override define INSTALL_RULE
@@ -17,7 +22,9 @@ override define INSTALL_RULE
 	install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)
 
 	@for SUBDIR in $(SUBDIRS); do \
-		$(MAKE) -C $$SUBDIR INSTALL_PATH=$(INSTALL_PATH)/$$SUBDIR install; \
+		BUILD_TARGET=$$OUTPUT/$$SUBDIR;	\
+		mkdir $$BUILD_TARGET  -p;	\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$SUBDIR INSTALL_PATH=$(INSTALL_PATH)/$$SUBDIR install; \
 	done;
 endef
 
@@ -26,4 +33,8 @@ override define EMIT_TESTS
 endef
 
 clean:
-	for DIR in $(SUBDIRS); do $(MAKE) -C $$DIR $@ ; done
+	for DIR in $(SUBDIRS); do		\
+		BUILD_TARGET=$$OUTPUT/$$DIR;	\
+		mkdir $$BUILD_TARGET  -p;	\
+		make OUTPUT=$$BUILD_TARGET/ -C $$DIR $@;\
+	done
diff --git a/tools/testing/selftests/kcmp/Makefile b/tools/testing/selftests/kcmp/Makefile
index 74a8add..0fb599e 100644
--- a/tools/testing/selftests/kcmp/Makefile
+++ b/tools/testing/selftests/kcmp/Makefile
@@ -2,7 +2,7 @@ CFLAGS += -I../../../../usr/include/
 
 TEST_GEN_PROGS := kcmp_test
 
-EXTRA_CLEAN := kcmp-test-file
+EXTRA_CLEAN := $(OUTPUT)kcmp-test-file
 
 include ../lib.mk
 
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 0f7a371..fa87f98 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -4,7 +4,8 @@ CC := $(CROSS_COMPILE)gcc
 
 define RUN_TESTS
 	@for TEST in $(TEST_GEN_PROGS) $(TEST_PROGS); do \
-		(./$$TEST && echo "selftests: $$TEST [PASS]") || echo "selftests: $$TEST [FAIL]"; \
+		BASENAME_TEST=`basename $$TEST`;	\
+		cd `dirname $$TEST`; (./$$BASENAME_TEST && echo "selftests: $$BASENAME_TEST [PASS]") || echo "selftests:  $$BASENAME_TEST [FAIL]"; cd -;\
 	done;
 endef
 
@@ -33,19 +34,29 @@ endif
 
 define EMIT_TESTS
 	@for TEST in $(TEST_GEN_PROGS) $(TEST_PROGS); do \
-		echo "(./$$TEST && echo \"selftests: $$TEST [PASS]\") || echo \"selftests: $$TEST [FAIL]\""; \
+		BASENAME_TEST=`basename $$TEST`;	\
+		echo "(./$$BASENAME_TEST && echo \"selftests: $$BASENAME_TEST [PASS]\") || echo \"selftests: $$BASENAME_TEST [FAIL]\""; \
 	done;
 endef
 
 emit_tests:
 	$(EMIT_TESTS)
 
+TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)%,$(TEST_GEN_PROGS))
+TEST_GEN_FILES := $(patsubst %,$(OUTPUT)%,$(TEST_GEN_FILES))
+
 all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
 
 clean:
 	$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
 
-%: %.c
-	$(CC) $(CFLAGS) $(LDFLAGS) $(LDLIBS) -o $@ $^
+$(OUTPUT)%:%.c
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDLIBS) $< -o $@
+
+$(OUTPUT)%.o:%.S
+	$(CC) $(ASFLAGS) -c $< -o $@
+
+$(OUTPUT)%:%.S
+	$(CC) $(ASFLAGS) $< -o $@
 
 .PHONY: run_tests all clean install emit_tests
diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile
index db54a33..e99a28c 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -33,31 +33,35 @@ endif
 all: $(SUB_DIRS)
 
 $(SUB_DIRS):
-	$(MAKE) -k -C $@ all
+	BUILD_TARGET=$$OUTPUT/$@; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET/ -k -C $@ all
 
 include ../lib.mk
 
 override define RUN_TESTS
 	@for TARGET in $(SUB_DIRS); do \
-		$(MAKE) -C $$TARGET run_tests; \
+		BUILD_TARGET=$$OUTPUT/$$TARGET;	\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET run_tests;\
 	done;
 endef
 
 override define INSTALL_RULE
 	@for TARGET in $(SUB_DIRS); do \
-		$(MAKE) -C $$TARGET install; \
+		BUILD_TARGET=$$OUTPUT/$$TARGET;	\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET install;\
 	done;
 endef
 
 override define EMIT_TESTS
 	@for TARGET in $(SUB_DIRS); do \
-		$(MAKE) -s -C $$TARGET emit_tests; \
+		BUILD_TARGET=$$OUTPUT/$$TARGET;	\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -s -C $$TARGET emit_tests;\
 	done;
 endef
 
 clean:
 	@for TARGET in $(SUB_DIRS); do \
-		$(MAKE) -C $$TARGET clean; \
+		BUILD_TARGET=$$OUTPUT/$$TARGET;	\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET clean;\
 	done;
 	rm -f tags
 
diff --git a/tools/testing/selftests/powerpc/benchmarks/Makefile b/tools/testing/selftests/powerpc/benchmarks/Makefile
index 1f94b31..3f6552c 100644
--- a/tools/testing/selftests/powerpc/benchmarks/Makefile
+++ b/tools/testing/selftests/powerpc/benchmarks/Makefile
@@ -4,10 +4,10 @@ CFLAGS += -O2
 
 $(TEST_GEN_PROGS): ../harness.c
 
-EXTRA_CLEAN = *.o
+EXTRA_CLEAN = $(OUTPUT)*.o
 
 include ../../lib.mk
 
-context_switch: ../utils.c
-context_switch: CFLAGS += -maltivec -mvsx -mabi=altivec
-context_switch: LDLIBS += -lpthread
+$(OUTPUT)context_switch: ../utils.c
+$(OUTPUT)context_switch: CFLAGS += -maltivec -mvsx -mabi=altivec
+$(OUTPUT)context_switch: LDLIBS += -lpthread
diff --git a/tools/testing/selftests/powerpc/copyloops/Makefile b/tools/testing/selftests/powerpc/copyloops/Makefile
index a768179..07b0307 100644
--- a/tools/testing/selftests/powerpc/copyloops/Makefile
+++ b/tools/testing/selftests/powerpc/copyloops/Makefile
@@ -9,14 +9,14 @@ ASFLAGS = $(CFLAGS)
 
 TEST_GEN_PROGS := copyuser_64 copyuser_power7 memcpy_64 memcpy_power7
 EXTRA_SOURCES := validate.c ../harness.c
-EXTRA_CLEAN := *.o
+EXTRA_CLEAN := $(OUTPUT)*.o
 
 include ../../lib.mk
 
-copyuser_64:     CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_base
-copyuser_power7: CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_power7
-memcpy_64:       CPPFLAGS += -D COPY_LOOP=test_memcpy
-memcpy_power7:   CPPFLAGS += -D COPY_LOOP=test_memcpy_power7
+$(OUTPUT)copyuser_64:     CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_base
+$(OUTPUT)copyuser_power7: CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_power7
+$(OUTPUT)memcpy_64:       CPPFLAGS += -D COPY_LOOP=test_memcpy
+$(OUTPUT)memcpy_power7:   CPPFLAGS += -D COPY_LOOP=test_memcpy_power7
 
 $(TEST_GEN_PROGS): $(EXTRA_SOURCES)
 
diff --git a/tools/testing/selftests/powerpc/dscr/Makefile b/tools/testing/selftests/powerpc/dscr/Makefile
index 7b43ac3..1df5da5 100644
--- a/tools/testing/selftests/powerpc/dscr/Makefile
+++ b/tools/testing/selftests/powerpc/dscr/Makefile
@@ -2,11 +2,10 @@ TEST_GEN_PROGS := dscr_default_test dscr_explicit_test dscr_user_test	\
 	      dscr_inherit_test dscr_inherit_exec_test dscr_sysfs_test	\
 	      dscr_sysfs_thread_test
 
-EXTRA_CLEAN := *.o
+EXTRA_CLEAN := $(OUTPUT)*.o
 
 include ../../lib.mk
 
-dscr_default_test: LDLIBS += -lpthread
+$(OUTPUT)dscr_default_test: LDLIBS += -lpthread
 
 $(TEST_GEN_PROGS): ../harness.c
-
diff --git a/tools/testing/selftests/powerpc/math/Makefile b/tools/testing/selftests/powerpc/math/Makefile
index 9aa9b22..3587df8 100644
--- a/tools/testing/selftests/powerpc/math/Makefile
+++ b/tools/testing/selftests/powerpc/math/Makefile
@@ -1,19 +1,19 @@
 TEST_GEN_PROGS := fpu_syscall fpu_preempt fpu_signal vmx_syscall vmx_preempt vmx_signal vsx_preempt
 
-EXTRA_CLEAN = *.o
+EXTRA_CLEAN = $(OUTPUT)*.o
 
 include ../../lib.mk
 
 $(TEST_GEN_PROGS): ../harness.c
 $(TEST_GEN_PROGS): CFLAGS += -O2 -g -pthread -m64 -maltivec
 
-fpu_syscall: fpu_asm.S
-fpu_preempt: fpu_asm.S
-fpu_signal:  fpu_asm.S
+$(OUTPUT)pu_syscall: fpu_asm.S
+$(OUTPUT)pu_preempt: fpu_asm.S
+$(OUTPUT)pu_signal:  fpu_asm.S
 
-vmx_syscall: vmx_asm.S
-vmx_preempt: vmx_asm.S
-vmx_signal: vmx_asm.S
+$(OUTPUT)mx_syscall: vmx_asm.S
+$(OUTPUT)mx_preempt: vmx_asm.S
+$(OUTPUT)mx_signal: vmx_asm.S
 
 vsx_preempt: CFLAGS += -mvsx
 vsx_preempt: vsx_asm.S
diff --git a/tools/testing/selftests/powerpc/mm/Makefile b/tools/testing/selftests/powerpc/mm/Makefile
index d563378..d4d2e68 100644
--- a/tools/testing/selftests/powerpc/mm/Makefile
+++ b/tools/testing/selftests/powerpc/mm/Makefile
@@ -8,8 +8,8 @@ include ../../lib.mk
 
 $(TEST_GEN_PROGS): ../harness.c
 
-prot_sao: ../utils.c
+$(OUTPUT)prot_sao: ../utils.c
 
-tempfile:
-	dd if=/dev/zero of=tempfile bs=64k count=1
+$(OUTPUT)tempfile:
+	dd if=/dev/zero of=$@ bs=64k count=1
 
diff --git a/tools/testing/selftests/powerpc/pmu/Makefile b/tools/testing/selftests/powerpc/pmu/Makefile
index ab0f902..1f084d0 100644
--- a/tools/testing/selftests/powerpc/pmu/Makefile
+++ b/tools/testing/selftests/powerpc/pmu/Makefile
@@ -11,34 +11,34 @@ all: $(TEST_GEN_PROGS) ebb
 $(TEST_GEN_PROGS): $(EXTRA_SOURCES)
 
 # loop.S can only be built 64-bit
-count_instructions: loop.S count_instructions.c $(EXTRA_SOURCES)
+$(OUTPUT)count_instructions: loop.S count_instructions.c $(EXTRA_SOURCES)
 	$(CC) $(CFLAGS) -m64 -o $@ $^
 
-per_event_excludes: ../utils.c
+$(OUTPUT)per_event_excludes: ../utils.c
 
 DEFAULT_RUN_TESTS := $(RUN_TESTS)
 override define RUN_TESTS
 	$(DEFAULT_RUN_TESTS)
-	$(MAKE) -C ebb run_tests
+	TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET run_tests
 endef
 
 DEFAULT_EMIT_TESTS := $(EMIT_TESTS)
 override define EMIT_TESTS
 	$(DEFAULT_EMIT_TESTS)
-	$(MAKE) -s -C ebb emit_tests
+	TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET/ -s -C $$TARGET emit_tests
 endef
 
 DEFAULT_INSTALL_RULE := $(INSTALL_RULE)
 override define INSTALL_RULE
 	$(DEFAULT_INSTALL_RULE)
-	$(MAKE) -C ebb install
+	TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET install
 endef
 
 clean:
-	$(RM) $(TEST_PROGS) loop.o
-	$(MAKE) -C ebb clean
+	$(RM) $(TEST_GEN_PROGS) $(OUTPUT)loop.o
+	TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET clean
 
 ebb:
-	$(MAKE) -k -C $@ all
+	TARGET=$@; BUILD_TARGET=$$OUTPUT/$$TARGET; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET/ -k -C $$TARGET all
 
 .PHONY: all run_tests clean ebb
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/Makefile b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
index 8dcedc4..c434a34 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/Makefile
+++ b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
@@ -21,6 +21,6 @@ include ../../../lib.mk
 $(TEST_GEN_PROGS): ../../harness.c ../../utils.c ../event.c ../lib.c \
 	       ebb.c ebb_handler.S trace.c busy_loop.S
 
-instruction_count_test: ../loop.S
+$(OUTPUT)instruction_count_test: ../loop.S
 
-lost_exception_test: ../lib.c
+$(OUTPUT)lost_exception_test: ../lib.c
diff --git a/tools/testing/selftests/powerpc/primitives/Makefile b/tools/testing/selftests/powerpc/primitives/Makefile
index 681627d..f6a0d14 100644
--- a/tools/testing/selftests/powerpc/primitives/Makefile
+++ b/tools/testing/selftests/powerpc/primitives/Makefile
@@ -2,7 +2,7 @@ CFLAGS += -I$(CURDIR)
 
 TEST_GEN_PROGS := load_unaligned_zeropad
 
-EXTRA_CLEAN = *.o
+EXTRA_CLEAN = $(OUTPUT)*.o
 
 include ../../lib.mk
 
diff --git a/tools/testing/selftests/powerpc/stringloops/Makefile b/tools/testing/selftests/powerpc/stringloops/Makefile
index 166fdb8..49245be 100644
--- a/tools/testing/selftests/powerpc/stringloops/Makefile
+++ b/tools/testing/selftests/powerpc/stringloops/Makefile
@@ -5,7 +5,7 @@ CFLAGS += -I$(CURDIR)
 TEST_GEN_PROGS := memcmp
 EXTRA_SOURCES := memcmp_64.S ../harness.c
 
-EXTRA_CLEAN = *.o
+EXTRA_CLEAN = $(OUTPUT)*.o
 
 include ../../lib.mk
 
diff --git a/tools/testing/selftests/powerpc/switch_endian/Makefile b/tools/testing/selftests/powerpc/switch_endian/Makefile
index dbd05ac..4d0bbf7 100644
--- a/tools/testing/selftests/powerpc/switch_endian/Makefile
+++ b/tools/testing/selftests/powerpc/switch_endian/Makefile
@@ -2,14 +2,14 @@ TEST_GEN_PROGS := switch_endian_test
 
 ASFLAGS += -O2 -Wall -g -nostdlib -m64
 
-EXTRA_CLEAN = *.o check-reversed.S
+EXTRA_CLEAN = $(OUTPUT)*.o $(OUTPUT)check-reversed.S
 
 include ../../lib.mk
 
-switch_endian_test: check-reversed.S
+$(OUTPUT)switch_endian_test: $(OUTPUT)check-reversed.S
 
-check-reversed.o: check.o
+$(OUTPUT)check-reversed.o: $(OUTPUT)check.o
 	$(CROSS_COMPILE)objcopy -j .text --reverse-bytes=4 -O binary $< $@
 
-check-reversed.S: check-reversed.o
+$(OUTPUT)check-reversed.S: $(OUTPUT)check-reversed.o
 	hexdump -v -e '/1 ".byte 0x%02X\n"' $< > $@
diff --git a/tools/testing/selftests/powerpc/syscalls/Makefile b/tools/testing/selftests/powerpc/syscalls/Makefile
index 1590938..5635076 100644
--- a/tools/testing/selftests/powerpc/syscalls/Makefile
+++ b/tools/testing/selftests/powerpc/syscalls/Makefile
@@ -2,7 +2,7 @@ TEST_GEN_PROGS := ipc_unmuxed
 
 CFLAGS += -I../../../../../usr/include
 
-EXTRAN_CLEAN = *.o
+EXTRAN_CLEAN = $(OUTPUT)*.o
 
 include ../../lib.mk
 
diff --git a/tools/testing/selftests/powerpc/tm/Makefile b/tools/testing/selftests/powerpc/tm/Makefile
index 0ad4674..7604559 100644
--- a/tools/testing/selftests/powerpc/tm/Makefile
+++ b/tools/testing/selftests/powerpc/tm/Makefile
@@ -4,7 +4,7 @@ SIGNAL_CONTEXT_CHK_TESTS := tm-signal-context-chk-gpr tm-signal-context-chk-fpu
 TEST_GEN_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack \
 	tm-vmxcopy tm-fork tm-tar tm-tmspr $(SIGNAL_CONTEXT_CHK_TESTS)
 
-EXTRA_CLEAN = *.o
+EXTRA_CLEAN = $(OUTPUT)*.o
 
 include ../../lib.mk
 
@@ -12,9 +12,9 @@ $(TEST_GEN_PROGS): ../harness.c ../utils.c
 
 CFLAGS += -mhtm
 
-tm-syscall: tm-syscall-asm.S
-tm-syscall: CFLAGS += -I../../../../../usr/include
-tm-tmspr: CFLAGS += -pthread
+$(OUTPUT)tm-syscall: tm-syscall-asm.S
+$(OUTPUT)tm-syscall: CFLAGS += -I../../../../../usr/include
+$(OUTPUT)tm-tmspr: CFLAGS += -pthread
 
 $(SIGNAL_CONTEXT_CHK_TESTS): tm-signal.S
 $(SIGNAL_CONTEXT_CHK_TESTS): CFLAGS += -mhtm -m64 -mvsx
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index eb0aaff..96ff395 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -13,7 +13,7 @@ TEST_GEN_FILES += transhuge-stress
 TEST_GEN_FILES += userfaultfd
 TEST_GEN_FILES += mlock-random-test
 
-userfaultfd: userfaultfd.c ../../../../usr/include/linux/kernel.h
+$(OUTPUT)userfaultfd: userfaultfd.c ../../../../usr/include/linux/kernel.h
 	$(CC) $(CFLAGS) -O2 -o $@ $< -lpthread
 
 mlock-random-test: mlock-random-test.c
diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile
index a89f80a..b11b310 100644
--- a/tools/testing/selftests/x86/Makefile
+++ b/tools/testing/selftests/x86/Makefile
@@ -17,6 +17,9 @@ TARGETS_C_64BIT_ALL := $(TARGETS_C_BOTHBITS) $(TARGETS_C_64BIT_ONLY)
 BINARIES_32 := $(TARGETS_C_32BIT_ALL:%=%_32)
 BINARIES_64 := $(TARGETS_C_64BIT_ALL:%=%_64)
 
+BINARIES_32 := $(patsubst %,$(OUTPUT)%,$(BINARIES_32))
+BINARIES_64 := $(patsubst %,$(OUTPUT)%,$(BINARIES_64))
+
 CFLAGS := -O2 -g -std=gnu99 -pthread -Wall
 
 UNAME_M := $(shell uname -m)
@@ -40,10 +43,10 @@ all_64: $(BINARIES_64)
 clean:
 	$(RM) $(BINARIES_32) $(BINARIES_64)
 
-$(TARGETS_C_32BIT_ALL:%=%_32): %_32: %.c
+$(BINARIES_32): $(OUTPUT)%_32: %.c
 	$(CC) -m32 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl -lm
 
-$(TARGETS_C_64BIT_ALL:%=%_64): %_64: %.c
+$(BINARIES_64): $(OUTPUT)%_64: %.c
 	$(CC) -m64 -o $@ $(CFLAGS) $(EXTRA_CFLAGS) $^ -lrt -ldl
 
 # x86_64 users should be encouraged to install 32-bit libraries
@@ -65,12 +68,12 @@ warn_32bit_failure:
 endif
 
 # Some tests have additional dependencies.
-sysret_ss_attrs_64: thunks.S
-ptrace_syscall_32: raw_syscall_helper_32.S
-test_syscall_vdso_32: thunks_32.S
+$(OUTPUT)sysret_ss_attrs_64: thunks.S
+$(OUTPUT)ptrace_syscall_32: raw_syscall_helper_32.S
+$(OUTPUT)test_syscall_vdso_32: thunks_32.S
 
 # check_initial_reg_state is special: it needs a custom entry, and it
 # needs to be static so that its interpreter doesn't destroy its initial
 # state.
-check_initial_reg_state_32: CFLAGS += -Wl,-ereal_start -static
-check_initial_reg_state_64: CFLAGS += -Wl,-ereal_start -static
+$(OUTPUT)check_initial_reg_state_32: CFLAGS += -Wl,-ereal_start -static
+$(OUTPUT)check_initial_reg_state_64: CFLAGS += -Wl,-ereal_start -static
