linux-stable.git/tools/testing/selftests/powerpc, branch linux-4.18.y Linux kernel stable tree powerpc/selftests: Wait all threads to join 2018-11-21T08:21:58+00:00 Breno Leitao leitao@debian.org 2018-07-31T20:55:57+00:00 3136e7a31323e7d82683a1ff83085b33457eaf55 [ Upstream commit 693b31b2fc1636f0aa7af53136d3b49f6ad9ff39 ] Test tm-tmspr might exit before all threads stop executing, because it just waits for the very last thread to join before proceeding/exiting. This patch makes sure that all threads that were created will join before proceeding/exiting. This patch also guarantees that the amount of threads being created is equal to thread_num. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
[ Upstream commit 693b31b2fc1636f0aa7af53136d3b49f6ad9ff39 ]

Test tm-tmspr might exit before all threads stop executing, because it just
waits for the very last thread to join before proceeding/exiting.

This patch makes sure that all threads that were created will join before
proceeding/exiting.

This patch also guarantees that the amount of threads being created is equal
to thread_num.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
selftests/powerpc: Fix ptrace tm failure 2018-11-13T19:12:52+00:00 Breno Leitao leitao@debian.org 2018-10-22T21:16:26+00:00 7d3714bb7abe85fd7d72854c2043997b47be580a commit 48dc0ef19044bfb69193302fbe3a834e3331b7ae upstream. Test ptrace-tm-spd-gpr fails on current kernel (4.19) due to a segmentation fault that happens on the child process prior to setting cptr[2] = 1. This causes the parent process to wait forever at 'while (!pptr[2])' and the test to be killed by the test harness framework by timeout, thus, failing. The segmentation fault happens because of a inline assembly being generated as: 0x10000355c <tm_spd_gpr+492> lfs f0, 0(0) This is reading memory position 0x0 and causing the segmentation fault. This code is being generated by ASM_LOAD_FPR_SINGLE_PRECISION(flt_4), where flt_4 is passed to the inline assembly block as: [flt_4] "r" (&d) Since the inline assembly 'r' constraint means any GPR, gpr0 is being chosen, thus causing this issue when issuing a Load Floating-Point Single instruction. This patch simply changes the constraint to 'b', which specify that this register will be used as base, and r0 is not allowed to be used, avoiding this issue. Other than that, removing flt_2 register from the input operands, since it is not used by the inline assembly code at all. Cc: stable@vger.kernel.org Signed-off-by: Breno Leitao <leitao@debian.org> Acked-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 48dc0ef19044bfb69193302fbe3a834e3331b7ae upstream.

Test ptrace-tm-spd-gpr fails on current kernel (4.19) due to a segmentation
fault that happens on the child process prior to setting cptr[2] = 1. This
causes the parent process to wait forever at 'while (!pptr[2])' and the test to
be killed by the test harness framework by timeout, thus, failing.

The segmentation fault happens because of a inline assembly being
generated as:

	0x10000355c <tm_spd_gpr+492>    lfs    f0, 0(0)

This is reading memory position 0x0 and causing the segmentation fault.

This code is being generated by ASM_LOAD_FPR_SINGLE_PRECISION(flt_4), where
flt_4 is passed to the inline assembly block as:

	[flt_4] "r" (&d)

Since the inline assembly 'r' constraint means any GPR, gpr0 is being
chosen, thus causing this issue when issuing a Load Floating-Point Single
instruction.

This patch simply changes the constraint to 'b', which specify that this
register will be used as base, and r0 is not allowed to be used, avoiding
this issue.

Other than that, removing flt_2 register from the input operands, since it
is not used by the inline assembly code at all.

Cc: stable@vger.kernel.org
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
selftests/powerpc: Kill child processes on SIGINT 2018-09-15T07:46:53+00:00 Breno Leitao leitao@debian.org 2018-08-07T14:15:39+00:00 c3fb1a354ccf3f4756a1f159ef7817d072d66b98 [ Upstream commit 7c27a26e1ed5a7dd709aa19685d2c98f64e1cf0c ] There are some powerpc selftests, as tm/tm-unavailable, that run for a long period (>120 seconds), and if it is interrupted, as pressing CRTL-C (SIGINT), the foreground process (harness) dies but the child process and threads continue to execute (with PPID = 1 now) in background. In this case, you'd think the whole test exited, but there are remaining threads and processes being executed in background. Sometimes these zombies processes are doing annoying things, as consuming the whole CPU or dumping things to STDOUT. This patch fixes this problem by attaching an empty signal handler to SIGINT in the harness process. This handler will interrupt (EINTR) the parent process waitpid() call, letting the code to follow through the normal flow, which will kill all the processes in the child process group. This patch also fixes a typo. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
[ Upstream commit 7c27a26e1ed5a7dd709aa19685d2c98f64e1cf0c ]

There are some powerpc selftests, as tm/tm-unavailable, that run for a long
period (>120 seconds), and if it is interrupted, as pressing CRTL-C
(SIGINT), the foreground process (harness) dies but the child process and
threads continue to execute (with PPID = 1 now) in background.

In this case, you'd think the whole test exited, but there are remaining
threads and processes being executed in background. Sometimes these
zombies processes are doing annoying things, as consuming the whole CPU or
dumping things to STDOUT.

This patch fixes this problem by attaching an empty signal handler to
SIGINT in the harness process. This handler will interrupt (EINTR) the
parent process waitpid() call, letting the code to follow through the
normal flow, which will kill all the processes in the child process group.

This patch also fixes a typo.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
selftests/powerpc: Add perf breakpoint test 2018-06-03T11:16:44+00:00 Michael Neuling mikey@neuling.org 2018-05-28T23:22:38+00:00 9c2d72d497a32788bf90f05610319a217258129a This tests perf hardware breakpoints (ie PERF_TYPE_BREAKPOINT) on powerpc. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> 
This tests perf hardware breakpoints (ie PERF_TYPE_BREAKPOINT) on
powerpc.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
selftests/powerpc: Add core file test for Protection Key registers 2018-05-28T08:46:36+00:00 Thiago Jung Bauermann bauerman@linux.ibm.com 2018-05-25T02:11:45+00:00 39b91dd625f15438859204a489ab62ef41d2be39 This test verifies that the AMR, IAMR and UAMOR are being written to a process' core file. Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> [mpe: Simplify make rule] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> 
This test verifies that the AMR, IAMR and UAMOR are being written to a
process' core file.

Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
[mpe: Simplify make rule]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
selftests/powerpc: Add ptrace tests for Protection Key registers 2018-05-28T08:46:35+00:00 Thiago Jung Bauermann bauerman@linux.ibm.com 2018-05-25T02:11:44+00:00 1f7256e7dddef49acf9f6c9fe3f93522a8a2a4c2 This test exercises read and write access to the AMR, IAMR and UAMOR. Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> [mpe: Simplify make rule] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> 
This test exercises read and write access to the AMR, IAMR and UAMOR.

Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
[mpe: Simplify make rule]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
selftests/powerpc: Add ptrace hw breakpoint test 2018-05-24T14:08:25+00:00 Michael Neuling mikey@neuling.org 2018-05-22T06:14:27+00:00 9c2ddfe55c42bf4b9bc336a0650ab78f9222a159 This test the ptrace hw breakpoints via PTRACE_SET_DEBUGREG and PPC_PTRACE_SETHWDEBUG. This test was use to find the bugs fixed by these recent commits: 4f7c06e26e powerpc/ptrace: Fix setting 512B aligned breakpoints with PTRACE_SET_DEBUGREG cd6ef7eebf powerpc/ptrace: Fix enforcement of DAWR constraints Signed-off-by: Michael Neuling <mikey@neuling.org> [mpe: Add SPDX tag, clang format it] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> 
This test the ptrace hw breakpoints via PTRACE_SET_DEBUGREG and
PPC_PTRACE_SETHWDEBUG.  This test was use to find the bugs fixed by
these recent commits:

  4f7c06e26e powerpc/ptrace: Fix setting 512B aligned breakpoints with PTRACE_SET_DEBUGREG
  cd6ef7eebf powerpc/ptrace: Fix enforcement of DAWR constraints

Signed-off-by: Michael Neuling <mikey@neuling.org>
[mpe: Add SPDX tag, clang format it]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
selftests/powerpc: Add missing .gitignores 2018-05-24T14:08:25+00:00 Michael Neuling mikey@neuling.org 2018-05-22T06:13:59+00:00 bd79010fb3a9aa160e1780e2496798e3ac6e7ba5 Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> 
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
selftests/powerpc: Remove redundant cp_abort test 2018-05-21T04:48:02+00:00 Michael Neuling mikey@neuling.org 2017-10-05T23:48:57+00:00 00c946a06ec8414ad22f0e8dcd17187bdd127a72 Paste on POWER9 only works on accelerators and no longer on real memory. Hence this test is broken so remove it. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> 
Paste on POWER9 only works on accelerators and no longer on real
memory. Hence this test is broken so remove it.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
selftests/powerpc: fix exec benchmark 2018-05-14T13:10:33+00:00 Nicholas Piggin npiggin@gmail.com 2018-05-12T03:35:24+00:00 c906d2c74e0bb9059fbf43e21f8a962986eb21e2 The exec_target binary could segfault calling _exit(2) because r13 is not set up properly (and libc looks at that when performing a syscall). Call SYS_exit using syscall(2) which doesn't seem to have this problem. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> 
The exec_target binary could segfault calling _exit(2) because r13
is not set up properly (and libc looks at that when performing a
syscall). Call SYS_exit using syscall(2) which doesn't seem to
have this problem.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>