powerpc updates for 4.4

- Kconfig: remove BE-only platforms from LE kernel build from Boqun Feng
  - Refresh ps3_defconfig from Geoff Levand
  - Emit GNU & SysV hashes for the vdso from Michael Ellerman
  - Define an enum for the bolted SLB indexes from Anshuman Khandual
  - Use a local to avoid multiple calls to get_slb_shadow() from Michael Ellerman
  - Add gettimeofday() benchmark from Michael Neuling
  - Avoid link stack corruption in __get_datapage() from Michael Neuling
  - Add virt_to_pfn and use this instead of opencoding from Aneesh Kumar K.V
  - Add ppc64le_defconfig from Michael Ellerman
  - pseries: extract of_helpers module from Andy Shevchenko
  - Correct string length in pseries_of_derive_parent() from Nathan Fontenot
  - Free the MSI bitmap if it was slab allocated from Denis Kirjanov
  - Shorten irq_chip name for the SIU from Christophe Leroy
  - Wait 1s for secondaries to enter OPAL during kexec from Samuel Mendoza-Jonas
  - Fix _ALIGN_* errors due to type difference. from Aneesh Kumar K.V
  - powerpc/pseries/hvcserver: don't memset pi_buff if it is null from Colin Ian King
  - Disable hugepd for 64K page size. from Aneesh Kumar K.V
  - Differentiate between hugetlb and THP during page walk from Aneesh Kumar K.V
  - Make PCI non-optional for pseries from Michael Ellerman
  - Individual System V IPC system calls from Sam bobroff
  - Add selftest of unmuxed IPC calls from Michael Ellerman
  - discard .exit.data at runtime from Stephen Rothwell
  - Delete old orphaned PrPMC 280/2800 DTS and boot file. from Paul Gortmaker
  - Use of_get_next_parent to simplify code from Christophe Jaillet
  - Paginate some xmon output from Sam bobroff
  - Add some more elements to the xmon PACA dump from Michael Ellerman
  - Allow the tm-syscall selftest to build with old headers from Michael Ellerman
  - Run EBB selftests only on POWER8 from Denis Kirjanov
  - Drop CONFIG_TUNE_CELL in favour of CONFIG_CELL_CPU from Michael Ellerman
  - Avoid reference to potentially freed memory in prom.c from Christophe Jaillet
  - Quieten boot wrapper output with run_cmd from Geoff Levand
  - EEH fixes and cleanups from Gavin Shan
  - Fix recursive fenced PHB on Broadcom shiner adapter from Gavin Shan
  - Use of_get_next_parent() in of_get_ibm_chip_id() from Michael Ellerman
  - Fix section mismatch warning in msi_bitmap_alloc() from Denis Kirjanov
  - Fix ps3-lpm white space from Rudhresh Kumar J
  - Fix ps3-vuart null dereference from Colin King
  - nvram: Add missing kfree in error path from Christophe Jaillet
  - nvram: Fix function name in some errors messages. from Christophe Jaillet
  - drivers/macintosh: adb: fix misleading Kconfig help text from Aaro Koskinen
  - agp/uninorth: fix a memleak in create_gatt_table from Denis Kirjanov
  - cxl: Free virtual PHB when removing from Andrew Donnellan
  - scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target from Michael Ellerman
  - scripts/kconfig/Makefile: Fix KBUILD_DEFCONFIG check when building with O= from Michael Ellerman
 
  - Freescale updates from Scott: Highlights include 64-bit book3e kexec/kdump
    support, a rework of the qoriq clock driver, device tree changes including
    qoriq fman nodes, support for a new 85xx board, and some fixes.
 
  - MPC5xxx updates from Anatolij: Highlights include a driver for MPC512x
    LocalPlus Bus FIFO with its device tree binding documentation, mpc512x
    device tree updates and some minor fixes.
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Merge tag 'powerpc-4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Kconfig: remove BE-only platforms from LE kernel build from Boqun
   Feng
 - Refresh ps3_defconfig from Geoff Levand
 - Emit GNU & SysV hashes for the vdso from Michael Ellerman
 - Define an enum for the bolted SLB indexes from Anshuman Khandual
 - Use a local to avoid multiple calls to get_slb_shadow() from Michael
   Ellerman
 - Add gettimeofday() benchmark from Michael Neuling
 - Avoid link stack corruption in __get_datapage() from Michael Neuling
 - Add virt_to_pfn and use this instead of opencoding from Aneesh Kumar
   K.V
 - Add ppc64le_defconfig from Michael Ellerman
 - pseries: extract of_helpers module from Andy Shevchenko
 - Correct string length in pseries_of_derive_parent() from Nathan
   Fontenot
 - Free the MSI bitmap if it was slab allocated from Denis Kirjanov
 - Shorten irq_chip name for the SIU from Christophe Leroy
 - Wait 1s for secondaries to enter OPAL during kexec from Samuel
   Mendoza-Jonas
 - Fix _ALIGN_* errors due to type difference, from Aneesh Kumar K.V
 - powerpc/pseries/hvcserver: don't memset pi_buff if it is null from
   Colin Ian King
 - Disable hugepd for 64K page size, from Aneesh Kumar K.V
 - Differentiate between hugetlb and THP during page walk from Aneesh
   Kumar K.V
 - Make PCI non-optional for pseries from Michael Ellerman
 - Individual System V IPC system calls from Sam bobroff
 - Add selftest of unmuxed IPC calls from Michael Ellerman
 - discard .exit.data at runtime from Stephen Rothwell
 - Delete old orphaned PrPMC 280/2800 DTS and boot file, from Paul
   Gortmaker
 - Use of_get_next_parent to simplify code from Christophe Jaillet
 - Paginate some xmon output from Sam bobroff
 - Add some more elements to the xmon PACA dump from Michael Ellerman
 - Allow the tm-syscall selftest to build with old headers from Michael
   Ellerman
 - Run EBB selftests only on POWER8 from Denis Kirjanov
 - Drop CONFIG_TUNE_CELL in favour of CONFIG_CELL_CPU from Michael
   Ellerman
 - Avoid reference to potentially freed memory in prom.c from Christophe
   Jaillet
 - Quieten boot wrapper output with run_cmd from Geoff Levand
 - EEH fixes and cleanups from Gavin Shan
 - Fix recursive fenced PHB on Broadcom shiner adapter from Gavin Shan
 - Use of_get_next_parent() in of_get_ibm_chip_id() from Michael
   Ellerman
 - Fix section mismatch warning in msi_bitmap_alloc() from Denis
   Kirjanov
 - Fix ps3-lpm white space from Rudhresh Kumar J
 - Fix ps3-vuart null dereference from Colin King
 - nvram: Add missing kfree in error path from Christophe Jaillet
 - nvram: Fix function name in some errors messages, from Christophe
   Jaillet
 - drivers/macintosh: adb: fix misleading Kconfig help text from Aaro
   Koskinen
 - agp/uninorth: fix a memleak in create_gatt_table from Denis Kirjanov
 - cxl: Free virtual PHB when removing from Andrew Donnellan
 - scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target from
   Michael Ellerman
 - scripts/kconfig/Makefile: Fix KBUILD_DEFCONFIG check when building
   with O= from Michael Ellerman
 - Freescale updates from Scott: Highlights include 64-bit book3e
   kexec/kdump support, a rework of the qoriq clock driver, device tree
   changes including qoriq fman nodes, support for a new 85xx board, and
   some fixes.
 - MPC5xxx updates from Anatolij: Highlights include a driver for
   MPC512x LocalPlus Bus FIFO with its device tree binding
   documentation, mpc512x device tree updates and some minor fixes.

* tag 'powerpc-4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (106 commits)
  powerpc/msi: Fix section mismatch warning in msi_bitmap_alloc()
  powerpc/prom: Use of_get_next_parent() in of_get_ibm_chip_id()
  powerpc/pseries: Correct string length in pseries_of_derive_parent()
  powerpc/e6500: hw tablewalk: make sure we invalidate and write to the same tlb entry
  powerpc/mpc85xx: Add FSL QorIQ DPAA FMan support to the SoC device tree(s)
  powerpc/mpc85xx: Create dts components for the FSL QorIQ DPAA FMan
  powerpc/fsl: Add #clock-cells and clockgen label to clockgen nodes
  powerpc: handle error case in cpm_muram_alloc()
  powerpc: mpic: use IRQCHIP_SKIP_SET_WAKE instead of redundant mpic_irq_set_wake
  powerpc/book3e-64: Enable kexec
  powerpc/book3e-64/kexec: Set "r4 = 0" when entering spinloop
  powerpc/booke: Only use VIRT_PHYS_OFFSET on booke32
  powerpc/book3e-64/kexec: Enable SMP release
  powerpc/book3e-64/kexec: create an identity TLB mapping
  powerpc/book3e-64: Don't limit paca to 256 MiB
  powerpc/book3e/kdump: Enable crash_kexec_wait_realmode
  powerpc/book3e: support CONFIG_RELOCATABLE
  powerpc/booke64: Fix args to copy_and_flush
  powerpc/book3e-64: rename interrupt_end_book3e with __end_interrupts
  powerpc/e6500: kexec: Handle hardware threads
  ...

tools/testing/selftests/powerpc/Makefile

@@ -12,7 +12,17 @@ CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CUR
 
 export CFLAGS
 
-SUB_DIRS = pmu copyloops mm tm primitives stringloops vphn switch_endian dscr
+SUB_DIRS = benchmarks 		\
+	   copyloops		\
+	   dscr			\
+	   mm			\
+	   pmu			\
+	   primitives		\
+	   stringloops		\
+	   switch_endian	\
+	   syscalls		\
+	   tm			\
+	   vphn
 
 endif
 

tools/testing/selftests/powerpc/benchmarks/.gitignore

@@ -0,0 +1 @@
+gettimeofday

tools/testing/selftests/powerpc/benchmarks/Makefile

@@ -0,0 +1,12 @@
+TEST_PROGS := gettimeofday
+
+CFLAGS += -O2
+
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): ../harness.c
+
+include ../../lib.mk
+
+clean:
+	rm -f $(TEST_PROGS) *.o

tools/testing/selftests/powerpc/benchmarks/gettimeofday.c

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2015, Anton Blanchard, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <sys/time.h>
+#include <stdio.h>
+
+#include "utils.h"
+
+static int test_gettimeofday(void)
+{
+	int i;
+
+	struct timeval tv_start, tv_end;
+
+	gettimeofday(&tv_start, NULL);
+
+	for(i = 0; i < 100000000; i++) {
+		gettimeofday(&tv_end, NULL);
+	}
+
+	printf("time = %.6f\n", tv_end.tv_sec - tv_start.tv_sec + (tv_end.tv_usec - tv_start.tv_usec) * 1e-6);
+
+	return 0;
+}
+
+int main(void)
+{
+	return test_harness(test_gettimeofday, "gettimeofday");
+}

tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c

@@ -63,6 +63,8 @@ int back_to_back_ebbs(void)
 {
 	struct event event;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x1001e, "cycles");
 	event_leader_ebb_init(&event);
 

tools/testing/selftests/powerpc/pmu/ebb/close_clears_pmcc_test.c

@@ -20,6 +20,8 @@ int close_clears_pmcc(void)
 {
 	struct event event;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x1001e, "cycles");
 	event_leader_ebb_init(&event);
 

tools/testing/selftests/powerpc/pmu/ebb/cpu_event_pinned_vs_ebb_test.c

@@ -43,6 +43,8 @@ int cpu_event_pinned_vs_ebb(void)
 	int cpu, rc;
 	pid_t pid;
 
+	SKIP_IF(!ebb_is_supported());
+
 	cpu = pick_online_cpu();
 	FAIL_IF(cpu < 0);
 	FAIL_IF(bind_to_cpu(cpu));

tools/testing/selftests/powerpc/pmu/ebb/cpu_event_vs_ebb_test.c

@@ -41,6 +41,8 @@ int cpu_event_vs_ebb(void)
 	int cpu, rc;
 	pid_t pid;
 
+	SKIP_IF(!ebb_is_supported());
+
 	cpu = pick_online_cpu();
 	FAIL_IF(cpu < 0);
 	FAIL_IF(bind_to_cpu(cpu));

tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c

@@ -16,6 +16,8 @@ int cycles(void)
 {
 	struct event event;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x1001e, "cycles");
 	event_leader_ebb_init(&event);
 

tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c

@@ -56,6 +56,8 @@ int cycles_with_freeze(void)
 	uint64_t val;
 	bool fc_cleared;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x1001e, "cycles");
 	event_leader_ebb_init(&event);
 

tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c

@@ -26,6 +26,8 @@ int cycles_with_mmcr2(void)
 	int i;
 	bool bad_mmcr2;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x1001e, "cycles");
 	event_leader_ebb_init(&event);
 

tools/testing/selftests/powerpc/pmu/ebb/ebb.c

@@ -13,6 +13,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
+#include <linux/auxvec.h>
 
 #include "trace.h"
 #include "reg.h"
@@ -319,6 +320,16 @@ void ebb_global_disable(void)
 	mb();
 }
 
+bool ebb_is_supported(void)
+{
+#ifdef PPC_FEATURE2_EBB
+	/* EBB requires at least POWER8 */
+	return ((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_EBB);
+#else
+	return false;
+#endif
+}
+
 void event_ebb_init(struct event *e)
 {
 	e->attr.config |= (1ull << 63);

tools/testing/selftests/powerpc/pmu/ebb/ebb.h

@@ -52,6 +52,7 @@ void standard_ebb_callee(void);
 int ebb_event_enable(struct event *e);
 void ebb_global_enable(void);
 void ebb_global_disable(void);
+bool ebb_is_supported(void);
 void ebb_freeze_pmcs(void);
 void ebb_unfreeze_pmcs(void);
 void event_ebb_init(struct event *e);

tools/testing/selftests/powerpc/pmu/ebb/ebb_on_child_test.c

@@ -47,6 +47,8 @@ int ebb_on_child(void)
 	struct event event;
 	pid_t pid;
 
+	SKIP_IF(!ebb_is_supported());
+
 	FAIL_IF(pipe(read_pipe.fds) == -1);
 	FAIL_IF(pipe(write_pipe.fds) == -1);
 

tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c

@@ -54,6 +54,8 @@ int ebb_on_willing_child(void)
 	struct event event;
 	pid_t pid;
 
+	SKIP_IF(!ebb_is_supported());
+
 	FAIL_IF(pipe(read_pipe.fds) == -1);
 	FAIL_IF(pipe(write_pipe.fds) == -1);
 

tools/testing/selftests/powerpc/pmu/ebb/ebb_vs_cpu_event_test.c

@@ -41,6 +41,8 @@ int ebb_vs_cpu_event(void)
 	int cpu, rc;
 	pid_t pid;
 
+	SKIP_IF(!ebb_is_supported());
+
 	cpu = pick_online_cpu();
 	FAIL_IF(cpu < 0);
 	FAIL_IF(bind_to_cpu(cpu));

tools/testing/selftests/powerpc/pmu/ebb/event_attributes_test.c

@@ -16,6 +16,8 @@ int event_attributes(void)
 {
 	struct event event, leader;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init(&event, 0x1001e);
 	event_leader_ebb_init(&event);
 	/* Expected to succeed */

tools/testing/selftests/powerpc/pmu/ebb/fork_cleanup_test.c

@@ -44,6 +44,8 @@ int fork_cleanup(void)
 {
 	pid_t pid;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x1001e, "cycles");
 	event_leader_ebb_init(&event);
 

tools/testing/selftests/powerpc/pmu/ebb/instruction_count_test.c

@@ -111,6 +111,8 @@ int instruction_count(void)
 	struct event event;
 	uint64_t overhead;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x400FA, "PM_RUN_INST_CMPL");
 	event_leader_ebb_init(&event);
 	event.attr.exclude_kernel = 1;

tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c

@@ -23,6 +23,8 @@ static int test_body(void)
 	int i, orig_period, max_period;
 	struct event event;
 
+	SKIP_IF(!ebb_is_supported());
+
 	/* We use PMC4 to make sure the kernel switches all counters correctly */
 	event_init_named(&event, 0x40002, "instructions");
 	event_leader_ebb_init(&event);

tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c

@@ -18,6 +18,8 @@ int multi_counter(void)
 	struct event events[6];
 	int i, group_fd;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&events[0], 0x1001C, "PM_CMPLU_STALL_THRD");
 	event_init_named(&events[1], 0x2D016, "PM_CMPLU_STALL_FXU");
 	event_init_named(&events[2], 0x30006, "PM_CMPLU_STALL_OTHER_CMPL");

tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c

@@ -79,6 +79,8 @@ int multi_ebb_procs(void)
 	pid_t pids[NR_CHILDREN];
 	int cpu, rc, i;
 
+	SKIP_IF(!ebb_is_supported());
+
 	cpu = pick_online_cpu();
 	FAIL_IF(cpu < 0);
 	FAIL_IF(bind_to_cpu(cpu));

tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c

@@ -19,6 +19,8 @@ static int no_handler_test(void)
 	u64 val;
 	int i;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x1001e, "cycles");
 	event_leader_ebb_init(&event);
 

tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c

@@ -58,6 +58,8 @@ static int test_body(void)
 {
 	struct event event;
 
+	SKIP_IF(!ebb_is_supported());
+
 	event_init_named(&event, 0x1001e, "cycles");
 	event_leader_ebb_init(&event);
 

tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c

@@ -49,6 +49,8 @@ int pmc56_overflow(void)
 {
 	struct event event;
 
+	SKIP_IF(!ebb_is_supported());
+
 	/* Use PMC2 so we set PMCjCE, which enables PMC5/6 */
 	event_init(&event, 0x2001e);
 	event_leader_ebb_init(&event);

tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c

@@ -18,6 +18,8 @@ int reg_access(void)
 {
 	uint64_t val, expected;
 
+	SKIP_IF(!ebb_is_supported());
+
 	expected = 0x8000000100000000ull;
 	mtspr(SPRN_BESCR, expected);
 	val = mfspr(SPRN_BESCR);

tools/testing/selftests/powerpc/pmu/ebb/task_event_pinned_vs_ebb_test.c

@@ -42,6 +42,8 @@ int task_event_pinned_vs_ebb(void)
 	pid_t pid;
 	int rc;
 
+	SKIP_IF(!ebb_is_supported());
+
 	FAIL_IF(pipe(read_pipe.fds) == -1);
 	FAIL_IF(pipe(write_pipe.fds) == -1);
 

tools/testing/selftests/powerpc/pmu/ebb/task_event_vs_ebb_test.c

@@ -40,6 +40,8 @@ int task_event_vs_ebb(void)
 	pid_t pid;
 	int rc;
 
+	SKIP_IF(!ebb_is_supported());
+
 	FAIL_IF(pipe(read_pipe.fds) == -1);
 	FAIL_IF(pipe(write_pipe.fds) == -1);
 

tools/testing/selftests/powerpc/syscalls/.gitignore

@@ -0,0 +1 @@
+ipc_unmuxed

tools/testing/selftests/powerpc/syscalls/Makefile

@@ -0,0 +1,12 @@
+TEST_PROGS := ipc_unmuxed
+
+CFLAGS += -I../../../../../usr/include
+
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): ../harness.c
+
+include ../../lib.mk
+
+clean:
+	rm -f $(TEST_PROGS) *.o

tools/testing/selftests/powerpc/syscalls/ipc.h

@@ -0,0 +1,47 @@
+#ifdef __NR_semop
+DO_TEST(semop, __NR_semop)
+#endif
+
+#ifdef __NR_semget
+DO_TEST(semget, __NR_semget)
+#endif
+
+#ifdef __NR_semctl
+DO_TEST(semctl, __NR_semctl)
+#endif
+
+#ifdef __NR_semtimedop
+DO_TEST(semtimedop, __NR_semtimedop)
+#endif
+
+#ifdef __NR_msgsnd
+DO_TEST(msgsnd, __NR_msgsnd)
+#endif
+
+#ifdef __NR_msgrcv
+DO_TEST(msgrcv, __NR_msgrcv)
+#endif
+
+#ifdef __NR_msgget
+DO_TEST(msgget, __NR_msgget)
+#endif
+
+#ifdef __NR_msgctl
+DO_TEST(msgctl, __NR_msgctl)
+#endif
+
+#ifdef __NR_shmat
+DO_TEST(shmat, __NR_shmat)
+#endif
+
+#ifdef __NR_shmdt
+DO_TEST(shmdt, __NR_shmdt)
+#endif
+
+#ifdef __NR_shmget
+DO_TEST(shmget, __NR_shmget)
+#endif
+
+#ifdef __NR_shmctl
+DO_TEST(shmctl, __NR_shmctl)
+#endif

tools/testing/selftests/powerpc/syscalls/ipc_unmuxed.c

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2015, Michael Ellerman, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * This test simply tests that certain syscalls are implemented. It doesn't
+ * actually exercise their logic in any way.
+ */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#include "utils.h"
+
+
+#define DO_TEST(_name, _num)	\
+static int test_##_name(void)			\
+{						\
+	int rc;					\
+	printf("Testing " #_name);		\
+	errno = 0;				\
+	rc = syscall(_num, -1, 0, 0, 0, 0, 0);	\
+	printf("\treturned %d, errno %d\n", rc, errno); \
+	return errno == ENOSYS;			\
+}
+
+#include "ipc.h"
+#undef DO_TEST
+
+static int ipc_unmuxed(void)
+{
+	int tests_done = 0;
+
+#define DO_TEST(_name, _num)		\
+	FAIL_IF(test_##_name());	\
+	tests_done++;
+
+#include "ipc.h"
+#undef DO_TEST
+
+	/*
+	 * If we ran no tests then it means none of the syscall numbers were
+	 * defined, possibly because we were built against old headers. But it
+	 * means we didn't really test anything, so instead of passing mark it
+	 * as a skip to give the user a clue.
+	 */
+	SKIP_IF(tests_done == 0);
+
+	return 0;
+}
+
+int main(void)
+{
+	return test_harness(ipc_unmuxed, "ipc_unmuxed");
+}

tools/testing/selftests/powerpc/tm/tm-syscall.c

@@ -77,13 +77,23 @@ pid_t getppid_tm(bool suspend)
 	exit(-1);
 }
 
+static inline bool have_htm_nosc(void)
+{
+#ifdef PPC_FEATURE2_HTM_NOSC
+	return ((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM_NOSC);
+#else
+	printf("PPC_FEATURE2_HTM_NOSC not defined, can't check AT_HWCAP2\n");
+	return false;
+#endif
+}
+
 int tm_syscall(void)
 {
 	unsigned count = 0;
 	struct timeval end, now;
 
-	SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2)
-		  & PPC_FEATURE2_HTM_NOSC));
+	SKIP_IF(!have_htm_nosc());
+
 	setbuf(stdout, NULL);
 
 	printf("Testing transactional syscalls for %d seconds...\n", TEST_DURATION);