kernel.git/tools/testing/selftests/powerpc/ptrace, branch linux-5.4.y

selftests/powerpc: ptrace-pkey: Don't update expected UAMOR value

2020-08-21T11:05:33Z

[ Upstream commit 3563b9bea0ca7f53e4218b5e268550341a49f333 ] With commit 4a4a5e5d2aad ("powerpc/pkeys: key allocation/deallocation must not change pkey registers") we are not updating UAMOR on key allocation. So don't update the expected uamor value in the test. Fixes: 4a4a5e5d2aad ("powerpc/pkeys: key allocation/deallocation must not change pkey registers") Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-23-aneesh.kumar@linux.ibm.com Signed-off-by: Sasha Levin

selftests/powerpc: ptrace-pkey: Update the test to mark an invalid pkey correctly

2020-08-21T11:05:33Z

[ Upstream commit 0eaa3b5ca7b5a76e3783639c828498343be66a01 ] Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-22-aneesh.kumar@linux.ibm.com Signed-off-by: Sasha Levin

selftests/powerpc: ptrace-pkey: Rename variables to make it easier to follow code

2020-08-21T11:05:33Z

[ Upstream commit 9a11f12e0a6c374b3ef1ce81e32ce477d28eb1b8 ] Rename variable to indicate that they are invalid values which we will use to test ptrace update of pkeys. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-21-aneesh.kumar@linux.ibm.com Signed-off-by: Sasha Levin

selftests/powerpc: Fixup clobbers for TM tests

2020-01-04T18:16:55Z

[ Upstream commit a02cbc7ffe529ed58b6bbe54652104fc2c88bd77 ] Some of our TM (Transactional Memory) tests, list "r1" (the stack pointer) as a clobbered register. GCC >= 9 doesn't accept this, and the build breaks: ptrace-tm-spd-tar.c: In function 'tm_spd_tar': ptrace-tm-spd-tar.c:31:2: error: listing the stack pointer register 'r1' in a clobber list is deprecated [-Werror=deprecated] 31 | asm __volatile__( | ^~~ ptrace-tm-spd-tar.c:31:2: note: the value of the stack pointer after an 'asm' statement must be the same as it was before the statement We do have some fairly large inline asm blocks in these tests, and some of them do change the value of r1. However they should all return to C with the value in r1 restored, so I think it's legitimate to say r1 is not clobbered. As Segher points out, the r1 clobbers may have been added because of the use of `or 1,1,1`, however that doesn't actually clobber r1. Segher also points out that some of these tests do clobber LR, because they call functions, and that is not listed in the clobbers, so add that where appropriate. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191029095324.14669-1-mpe@ellerman.id.au Signed-off-by: Sasha Levin

selftests/powerpc: Ignore generated files

2019-08-22T13:12:47Z

Currently some binary files which are generated when tests are compiled are not ignored by git, so 'git status' catch them. For copyloops test, fix wrong binary names already in .gitignore. For ptrace, security, and stringloops tests add missing binary names to the .gitignore file. Signed-off-by: Gustavo Romero Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190814205638.25322-2-gromero@linux.ibm.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32Z

Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

selftests/powerpc: Skip test instead of failing

2018-11-25T06:11:22Z

Current core-pkey selftest fails if the test runs without privileges to write into the core pattern file (/proc/sys/kernel/core_pattern). This causes the test to fail and give the impression that the subsystem being tested is broken, when, in fact, the test is being executed without the proper privileges. This is the current error: test: core_pkey tags: git_version:v4.19-3-g9e3363be9bce-dirty Error writing to core_pattern file: Permission denied failure: core_pkey This patch simply skips this test if it runs without the proper privileges, avoiding this undesired failure. CC: Tyrel Datwyler CC: Thiago Jung Bauermann Signed-off-by: Breno Leitao Reviewed-by: Thiago Jung Bauermann Signed-off-by: Michael Ellerman

selftests/powerpc: Allocate base registers

2018-11-25T06:11:21Z

Some ptrace selftests are passing input operands using a constraint that can allocate any register for the operand, and using these registers on load/store operations. If the register allocated by the compiler happens to be zero (r0), it might cause an invalid memory address access, since load and store operations consider the content of 0x0 address if the base register is r0, instead of the content of the r0 register. For example: r1 := 0xdeadbeef r0 := 0xdeadbeef ld r2, 0(1) /* will load into r2 the content of r1 address */ ld r2, 0(0) /* will load into r2 the content of 0x0 */ In order to avoid this possible problem, the inline assembly constraint should be aware that these registers will be used as a base register, thus, r0 should not be allocated. Other than that, this patch removes inline assembly operands that are not used by the tests. Signed-off-by: Breno Leitao Reviewed-by: Segher Boessenkool Signed-off-by: Michael Ellerman

selftests/powerpc/ptrace: Fix out-of-tree build

2018-10-31T12:56:19Z

We should use TEST_GEN_PROGS, not TEST_PROGS. That tells the selftests makefile (lib.mk) that those tests are generated (built), and so it adds the $(OUTPUT) prefix for us, making the out-of-tree build work correctly. It also means we don't need our own clean rule, lib.mk does it. We also have to update the ptrace-pkey and core-pkey rules to use $(OUTPUT). Signed-off-by: Joel Stanley Signed-off-by: Michael Ellerman

selftests/powerpc: Fix ptrace tm failure

2018-10-26T10:58:58Z

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 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 Acked-by: Segher Boessenkool Signed-off-by: Michael Ellerman