diff --git a/tools/testing/selftests/powerpc/pmu/ebb/Makefile b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
index edbba2affc2c..251447eafe49 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/Makefile
+++ b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
@@ -17,7 +17,7 @@ PROGS := reg_access_test event_attributes_test cycles_test	\
 
 all: $(PROGS)
 
-$(PROGS): ../../harness.c ../event.c ../lib.c ebb.c ebb_handler.S trace.c
+$(PROGS): ../../harness.c ../event.c ../lib.c ebb.c ebb_handler.S trace.c busy_loop.S
 
 instruction_count_test: ../loop.S
 
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/busy_loop.S b/tools/testing/selftests/powerpc/pmu/ebb/busy_loop.S
new file mode 100644
index 000000000000..c7e4093f1cd3
--- /dev/null
+++ b/tools/testing/selftests/powerpc/pmu/ebb/busy_loop.S
@@ -0,0 +1,271 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <ppc-asm.h>
+
+	.text
+
+FUNC_START(core_busy_loop)
+	stdu	%r1, -168(%r1)
+	std	r14, 160(%r1)
+	std	r15, 152(%r1)
+	std	r16, 144(%r1)
+	std	r17, 136(%r1)
+	std	r18, 128(%r1)
+	std	r19, 120(%r1)
+	std	r20, 112(%r1)
+	std	r21, 104(%r1)
+	std	r22, 96(%r1)
+	std	r23, 88(%r1)
+	std	r24, 80(%r1)
+	std	r25, 72(%r1)
+	std	r26, 64(%r1)
+	std	r27, 56(%r1)
+	std	r28, 48(%r1)
+	std	r29, 40(%r1)
+	std	r30, 32(%r1)
+	std	r31, 24(%r1)
+
+	li	 r3, 0x3030
+	std	 r3, -96(%r1)
+	li	 r4, 0x4040
+	std	 r4, -104(%r1)
+	li	 r5, 0x5050
+	std	 r5, -112(%r1)
+	li	 r6, 0x6060
+	std	 r6, -120(%r1)
+	li	 r7, 0x7070
+	std	 r7, -128(%r1)
+	li	 r8, 0x0808
+	std	 r8, -136(%r1)
+	li	 r9, 0x0909
+	std	 r9, -144(%r1)
+	li	r10, 0x1010
+	std	r10, -152(%r1)
+	li	r11, 0x1111
+	std	r11, -160(%r1)
+	li	r14, 0x1414
+	std	r14, -168(%r1)
+	li	r15, 0x1515
+	std	r15, -176(%r1)
+	li	r16, 0x1616
+	std	r16, -184(%r1)
+	li	r17, 0x1717
+	std	r17, -192(%r1)
+	li	r18, 0x1818
+	std	r18, -200(%r1)
+	li	r19, 0x1919
+	std	r19, -208(%r1)
+	li	r20, 0x2020
+	std	r20, -216(%r1)
+	li	r21, 0x2121
+	std	r21, -224(%r1)
+	li	r22, 0x2222
+	std	r22, -232(%r1)
+	li	r23, 0x2323
+	std	r23, -240(%r1)
+	li	r24, 0x2424
+	std	r24, -248(%r1)
+	li	r25, 0x2525
+	std	r25, -256(%r1)
+	li	r26, 0x2626
+	std	r26, -264(%r1)
+	li	r27, 0x2727
+	std	r27, -272(%r1)
+	li	r28, 0x2828
+	std	r28, -280(%r1)
+	li	r29, 0x2929
+	std	r29, -288(%r1)
+	li	r30, 0x3030
+	li	r31, 0x3131
+
+	li	r3, 0
+0:	addi	r3, r3, 1
+	cmpwi	r3, 100
+	blt	0b
+
+	/* Return 1 (fail) unless we get through all the checks */
+	li	r3, 1
+
+	/* Check none of our registers have been corrupted */
+	cmpwi	r4,  0x4040
+	bne	1f
+	cmpwi	r5,  0x5050
+	bne	1f
+	cmpwi	r6,  0x6060
+	bne	1f
+	cmpwi	r7,  0x7070
+	bne	1f
+	cmpwi	r8,  0x0808
+	bne	1f
+	cmpwi	r9,  0x0909
+	bne	1f
+	cmpwi	r10, 0x1010
+	bne	1f
+	cmpwi	r11, 0x1111
+	bne	1f
+	cmpwi	r14, 0x1414
+	bne	1f
+	cmpwi	r15, 0x1515
+	bne	1f
+	cmpwi	r16, 0x1616
+	bne	1f
+	cmpwi	r17, 0x1717
+	bne	1f
+	cmpwi	r18, 0x1818
+	bne	1f
+	cmpwi	r19, 0x1919
+	bne	1f
+	cmpwi	r20, 0x2020
+	bne	1f
+	cmpwi	r21, 0x2121
+	bne	1f
+	cmpwi	r22, 0x2222
+	bne	1f
+	cmpwi	r23, 0x2323
+	bne	1f
+	cmpwi	r24, 0x2424
+	bne	1f
+	cmpwi	r25, 0x2525
+	bne	1f
+	cmpwi	r26, 0x2626
+	bne	1f
+	cmpwi	r27, 0x2727
+	bne	1f
+	cmpwi	r28, 0x2828
+	bne	1f
+	cmpwi	r29, 0x2929
+	bne	1f
+	cmpwi	r30, 0x3030
+	bne	1f
+	cmpwi	r31, 0x3131
+	bne	1f
+
+	/* Load junk into all our registers before we reload them from the stack. */
+	li	r3,  0xde
+	li	r4,  0xad
+	li	r5,  0xbe
+	li	r6,  0xef
+	li	r7,  0xde
+	li	r8,  0xad
+	li	r9,  0xbe
+	li	r10, 0xef
+	li	r11, 0xde
+	li	r14, 0xad
+	li	r15, 0xbe
+	li	r16, 0xef
+	li	r17, 0xde
+	li	r18, 0xad
+	li	r19, 0xbe
+	li	r20, 0xef
+	li	r21, 0xde
+	li	r22, 0xad
+	li	r23, 0xbe
+	li	r24, 0xef
+	li	r25, 0xde
+	li	r26, 0xad
+	li	r27, 0xbe
+	li	r28, 0xef
+	li	r29, 0xdd
+
+	ld	r3,	-96(%r1)
+	cmpwi	r3,  0x3030
+	bne	1f
+	ld	r4,	-104(%r1)
+	cmpwi	r4,  0x4040
+	bne	1f
+	ld	r5,	-112(%r1)
+	cmpwi	r5,  0x5050
+	bne	1f
+	ld	r6,	-120(%r1)
+	cmpwi	r6,  0x6060
+	bne	1f
+	ld	r7,	-128(%r1)
+	cmpwi	r7,  0x7070
+	bne	1f
+	ld	r8,	-136(%r1)
+	cmpwi	r8,  0x0808
+	bne	1f
+	ld	r9,	-144(%r1)
+	cmpwi	r9,  0x0909
+	bne	1f
+	ld	r10, -152(%r1)
+	cmpwi	r10, 0x1010
+	bne	1f
+	ld	r11, -160(%r1)
+	cmpwi	r11, 0x1111
+	bne	1f
+	ld	r14, -168(%r1)
+	cmpwi	r14, 0x1414
+	bne	1f
+	ld	r15, -176(%r1)
+	cmpwi	r15, 0x1515
+	bne	1f
+	ld	r16, -184(%r1)
+	cmpwi	r16, 0x1616
+	bne	1f
+	ld	r17, -192(%r1)
+	cmpwi	r17, 0x1717
+	bne	1f
+	ld	r18, -200(%r1)
+	cmpwi	r18, 0x1818
+	bne	1f
+	ld	r19, -208(%r1)
+	cmpwi	r19, 0x1919
+	bne	1f
+	ld	r20, -216(%r1)
+	cmpwi	r20, 0x2020
+	bne	1f
+	ld	r21, -224(%r1)
+	cmpwi	r21, 0x2121
+	bne	1f
+	ld	r22, -232(%r1)
+	cmpwi	r22, 0x2222
+	bne	1f
+	ld	r23, -240(%r1)
+	cmpwi	r23, 0x2323
+	bne	1f
+	ld	r24, -248(%r1)
+	cmpwi	r24, 0x2424
+	bne	1f
+	ld	r25, -256(%r1)
+	cmpwi	r25, 0x2525
+	bne	1f
+	ld	r26, -264(%r1)
+	cmpwi	r26, 0x2626
+	bne	1f
+	ld	r27, -272(%r1)
+	cmpwi	r27, 0x2727
+	bne	1f
+	ld	r28, -280(%r1)
+	cmpwi	r28, 0x2828
+	bne	1f
+	ld	r29, -288(%r1)
+	cmpwi	r29, 0x2929
+	bne	1f
+
+	/* Load 0 (success) to return */
+	li	r3, 0
+
+1:	ld	r14, 160(%r1)
+	ld	r15, 152(%r1)
+	ld	r16, 144(%r1)
+	ld	r17, 136(%r1)
+	ld	r18, 128(%r1)
+	ld	r19, 120(%r1)
+	ld	r20, 112(%r1)
+	ld	r21, 104(%r1)
+	ld	r22, 96(%r1)
+	ld	r23, 88(%r1)
+	ld	r24, 80(%r1)
+	ld	r25, 72(%r1)
+	ld	r26, 64(%r1)
+	ld	r27, 56(%r1)
+	ld	r28, 48(%r1)
+	ld	r29, 40(%r1)
+	ld	r30, 32(%r1)
+	ld	r31, 24(%r1)
+	addi	%r1, %r1, 168
+	blr
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb.c b/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
index 1b46be94b64c..b7ee607c0fca 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
@@ -335,257 +335,6 @@ void event_leader_ebb_init(struct event *e)
 	e->attr.pinned = 1;
 }
 
-int core_busy_loop(void)
-{
-	int rc;
-
-	asm volatile (
-		"li  3,  0x3030\n"
-		"std 3,  -96(1)\n"
-		"li  4,  0x4040\n"
-		"std 4,  -104(1)\n"
-		"li  5,  0x5050\n"
-		"std 5,  -112(1)\n"
-		"li  6,  0x6060\n"
-		"std 6,  -120(1)\n"
-		"li  7,  0x7070\n"
-		"std 7,  -128(1)\n"
-		"li  8,  0x0808\n"
-		"std 8,  -136(1)\n"
-		"li  9,  0x0909\n"
-		"std 9,  -144(1)\n"
-		"li  10, 0x1010\n"
-		"std 10, -152(1)\n"
-		"li  11, 0x1111\n"
-		"std 11, -160(1)\n"
-		"li  14, 0x1414\n"
-		"std 14, -168(1)\n"
-		"li  15, 0x1515\n"
-		"std 15, -176(1)\n"
-		"li  16, 0x1616\n"
-		"std 16, -184(1)\n"
-		"li  17, 0x1717\n"
-		"std 17, -192(1)\n"
-		"li  18, 0x1818\n"
-		"std 18, -200(1)\n"
-		"li  19, 0x1919\n"
-		"std 19, -208(1)\n"
-		"li  20, 0x2020\n"
-		"std 20, -216(1)\n"
-		"li  21, 0x2121\n"
-		"std 21, -224(1)\n"
-		"li  22, 0x2222\n"
-		"std 22, -232(1)\n"
-		"li  23, 0x2323\n"
-		"std 23, -240(1)\n"
-		"li  24, 0x2424\n"
-		"std 24, -248(1)\n"
-		"li  25, 0x2525\n"
-		"std 25, -256(1)\n"
-		"li  26, 0x2626\n"
-		"std 26, -264(1)\n"
-		"li  27, 0x2727\n"
-		"std 27, -272(1)\n"
-		"li  28, 0x2828\n"
-		"std 28, -280(1)\n"
-		"li  29, 0x2929\n"
-		"std 29, -288(1)\n"
-		"li  30, 0x3030\n"
-		"li  31, 0x3131\n"
-
-		"li    3,  0\n"
-		"0: "
-		"addi  3, 3, 1\n"
-		"cmpwi 3, 100\n"
-		"blt   0b\n"
-
-		/* Return 1 (fail) unless we get through all the checks */
-		"li	0, 1\n"
-
-		/* Check none of our registers have been corrupted */
-		"cmpwi  4,  0x4040\n"
-		"bne	1f\n"
-		"cmpwi  5,  0x5050\n"
-		"bne	1f\n"
-		"cmpwi  6,  0x6060\n"
-		"bne	1f\n"
-		"cmpwi  7,  0x7070\n"
-		"bne	1f\n"
-		"cmpwi  8,  0x0808\n"
-		"bne	1f\n"
-		"cmpwi  9,  0x0909\n"
-		"bne	1f\n"
-		"cmpwi  10, 0x1010\n"
-		"bne	1f\n"
-		"cmpwi  11, 0x1111\n"
-		"bne	1f\n"
-		"cmpwi  14, 0x1414\n"
-		"bne	1f\n"
-		"cmpwi  15, 0x1515\n"
-		"bne	1f\n"
-		"cmpwi  16, 0x1616\n"
-		"bne	1f\n"
-		"cmpwi  17, 0x1717\n"
-		"bne	1f\n"
-		"cmpwi  18, 0x1818\n"
-		"bne	1f\n"
-		"cmpwi  19, 0x1919\n"
-		"bne	1f\n"
-		"cmpwi  20, 0x2020\n"
-		"bne	1f\n"
-		"cmpwi  21, 0x2121\n"
-		"bne	1f\n"
-		"cmpwi  22, 0x2222\n"
-		"bne	1f\n"
-		"cmpwi  23, 0x2323\n"
-		"bne	1f\n"
-		"cmpwi  24, 0x2424\n"
-		"bne	1f\n"
-		"cmpwi  25, 0x2525\n"
-		"bne	1f\n"
-		"cmpwi  26, 0x2626\n"
-		"bne	1f\n"
-		"cmpwi  27, 0x2727\n"
-		"bne	1f\n"
-		"cmpwi  28, 0x2828\n"
-		"bne	1f\n"
-		"cmpwi  29, 0x2929\n"
-		"bne	1f\n"
-		"cmpwi  30, 0x3030\n"
-		"bne	1f\n"
-		"cmpwi  31, 0x3131\n"
-		"bne	1f\n"
-
-		/* Load junk into all our registers before we reload them from the stack. */
-		"li  3,  0xde\n"
-		"li  4,  0xad\n"
-		"li  5,  0xbe\n"
-		"li  6,  0xef\n"
-		"li  7,  0xde\n"
-		"li  8,  0xad\n"
-		"li  9,  0xbe\n"
-		"li  10, 0xef\n"
-		"li  11, 0xde\n"
-		"li  14, 0xad\n"
-		"li  15, 0xbe\n"
-		"li  16, 0xef\n"
-		"li  17, 0xde\n"
-		"li  18, 0xad\n"
-		"li  19, 0xbe\n"
-		"li  20, 0xef\n"
-		"li  21, 0xde\n"
-		"li  22, 0xad\n"
-		"li  23, 0xbe\n"
-		"li  24, 0xef\n"
-		"li  25, 0xde\n"
-		"li  26, 0xad\n"
-		"li  27, 0xbe\n"
-		"li  28, 0xef\n"
-		"li  29, 0xdd\n"
-
-		"ld     3,  -96(1)\n"
-		"cmpwi  3,  0x3030\n"
-		"bne	1f\n"
-		"ld     4,  -104(1)\n"
-		"cmpwi  4,  0x4040\n"
-		"bne	1f\n"
-		"ld     5,  -112(1)\n"
-		"cmpwi  5,  0x5050\n"
-		"bne	1f\n"
-		"ld     6,  -120(1)\n"
-		"cmpwi  6,  0x6060\n"
-		"bne	1f\n"
-		"ld     7,  -128(1)\n"
-		"cmpwi  7,  0x7070\n"
-		"bne	1f\n"
-		"ld     8,  -136(1)\n"
-		"cmpwi  8,  0x0808\n"
-		"bne	1f\n"
-		"ld     9,  -144(1)\n"
-		"cmpwi  9,  0x0909\n"
-		"bne	1f\n"
-		"ld     10, -152(1)\n"
-		"cmpwi  10, 0x1010\n"
-		"bne	1f\n"
-		"ld     11, -160(1)\n"
-		"cmpwi  11, 0x1111\n"
-		"bne	1f\n"
-		"ld     14, -168(1)\n"
-		"cmpwi  14, 0x1414\n"
-		"bne	1f\n"
-		"ld     15, -176(1)\n"
-		"cmpwi  15, 0x1515\n"
-		"bne	1f\n"
-		"ld     16, -184(1)\n"
-		"cmpwi  16, 0x1616\n"
-		"bne	1f\n"
-		"ld     17, -192(1)\n"
-		"cmpwi  17, 0x1717\n"
-		"bne	1f\n"
-		"ld     18, -200(1)\n"
-		"cmpwi  18, 0x1818\n"
-		"bne	1f\n"
-		"ld     19, -208(1)\n"
-		"cmpwi  19, 0x1919\n"
-		"bne	1f\n"
-		"ld     20, -216(1)\n"
-		"cmpwi  20, 0x2020\n"
-		"bne	1f\n"
-		"ld     21, -224(1)\n"
-		"cmpwi  21, 0x2121\n"
-		"bne	1f\n"
-		"ld     22, -232(1)\n"
-		"cmpwi  22, 0x2222\n"
-		"bne	1f\n"
-		"ld     23, -240(1)\n"
-		"cmpwi  23, 0x2323\n"
-		"bne	1f\n"
-		"ld     24, -248(1)\n"
-		"cmpwi  24, 0x2424\n"
-		"bne	1f\n"
-		"ld     25, -256(1)\n"
-		"cmpwi  25, 0x2525\n"
-		"bne	1f\n"
-		"ld     26, -264(1)\n"
-		"cmpwi  26, 0x2626\n"
-		"bne	1f\n"
-		"ld     27, -272(1)\n"
-		"cmpwi  27, 0x2727\n"
-		"bne	1f\n"
-		"ld     28, -280(1)\n"
-		"cmpwi  28, 0x2828\n"
-		"bne	1f\n"
-		"ld     29, -288(1)\n"
-		"cmpwi  29, 0x2929\n"
-		"bne	1f\n"
-
-		/* Load 0 (success) to return */
-		"li	0, 0\n"
-
-		"1: 	mr %0, 0\n"
-
-		: "=r" (rc)
-		: /* no inputs */
-		: "3", "4", "5", "6", "7", "8", "9", "10", "11", "14",
-		  "15", "16", "17", "18", "19", "20", "21", "22", "23",
-		   "24", "25", "26", "27", "28", "29", "30", "31",
-		   "memory"
-	);
-
-	return rc;
-}
-
-int core_busy_loop_with_freeze(void)
-{
-	int rc;
-
-	mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~MMCR0_FC);
-	rc = core_busy_loop();
-	mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) |  MMCR0_FC);
-
-	return rc;
-}
-
 int ebb_child(union pipe read_pipe, union pipe write_pipe)
 {
 	struct event event;
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb.h b/tools/testing/selftests/powerpc/pmu/ebb/ebb.h
index e62bde05bf78..e44eee5d97ca 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb.h
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb.h
@@ -70,7 +70,6 @@ int ebb_check_mmcr0(void);
 extern u64 sample_period;
 
 int core_busy_loop(void);
-int core_busy_loop_with_freeze(void);
 int ebb_child(union pipe read_pipe, union pipe write_pipe);
 int catch_sigill(void (*func)(void));
 void write_pmc1(void);