selftests/powerpc: Turn off timeout setting for benchmarks, dscr, signal, tm

Some specific tests in powerpc can take longer than the default 45
seconds that added in commit 852c8cbf ("selftests/kselftest/runner.sh:
Add 45 second timeout per test") to run, the following test result was
collected across 2 Power8 nodes and 1 Power9 node in our pool:
  powerpc/benchmarks/futex_bench - 52s
  powerpc/dscr/dscr_sysfs_test - 116s
  powerpc/signal/signal_fuzzer - 88s
  powerpc/tm/tm_unavailable_test - 168s
  powerpc/tm/tm-poison - 240s

Thus they will fail with TIMEOUT error. Disable the timeout setting
for these sub-tests to allow them finish properly.

https://bugs.launchpad.net/bugs/1864642
Fixes: 852c8cbf ("selftests/kselftest/runner.sh: Add 45 second timeout per test")
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200318060004.10685-1-po-hsu.lin@canonical.com

tools/testing/selftests/powerpc/benchmarks/Makefile

@@ -2,6 +2,8 @@
 TEST_GEN_PROGS := gettimeofday context_switch fork mmap_bench futex_bench null_syscall
 TEST_GEN_FILES := exec_target
 
+TEST_FILES := settings
+
 CFLAGS += -O2
 
 top_srcdir = ../../../../..

tools/testing/selftests/powerpc/benchmarks/settings

+timeout=0

tools/testing/selftests/powerpc/dscr/Makefile

@@ -3,6 +3,8 @@ 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
 
+TEST_FILES := settings
+
 top_srcdir = ../../../../..
 include ../../lib.mk
 

tools/testing/selftests/powerpc/dscr/settings

+timeout=0

tools/testing/selftests/powerpc/signal/Makefile

@@ -5,6 +5,8 @@ CFLAGS += -maltivec
 $(OUTPUT)/signal_tm: CFLAGS += -mhtm
 $(OUTPUT)/sigfuz: CFLAGS += -pthread -m64
 
+TEST_FILES := settings
+
 top_srcdir = ../../../../..
 include ../../lib.mk
 

tools/testing/selftests/powerpc/signal/settings

+timeout=0

tools/testing/selftests/powerpc/tm/Makefile

@@ -7,6 +7,8 @@ TEST_GEN_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack
 	$(SIGNAL_CONTEXT_CHK_TESTS) tm-sigreturn tm-signal-sigreturn-nt \
 	tm-signal-context-force-tm tm-poison tm-signal-pagefault
 
+TEST_FILES := settings
+
 top_srcdir = ../../../../..
 include ../../lib.mk
 

tools/testing/selftests/powerpc/tm/settings

+timeout=0