kernel/linux.git/tools/testing/selftests/powerpc/alignment, branch v5.10.89

selftests/powerpc: Only test lwm/stmw on big endian

2021-02-07T14:37:16+00:00

[ Upstream commit dd3a44c06f7b4f14e90065bf05d62c255b20005f ] Newer binutils (>= 2.36) refuse to assemble lmw/stmw when building in little endian mode. That breaks compilation of our alignment handler test: /tmp/cco4l14N.s: Assembler messages: /tmp/cco4l14N.s:1440: Error: `lmw' invalid when little-endian /tmp/cco4l14N.s:1814: Error: `stmw' invalid when little-endian make[2]: *** [../../lib.mk:139: /output/kselftest/powerpc/alignment/alignment_handler] Error 1 These tests do pass on little endian machines, as the kernel will still emulate those instructions even when running little endian (which is arguably a kernel bug). But we don't really need to test that case, so ifdef those instructions out to get the alignment test building again. Reported-by: Libor Pechacek Signed-off-by: Michael Ellerman Tested-by: Libor Pechacek Link: https://lore.kernel.org/r/20210119041800.3093047-1-mpe@ellerman.id.au Signed-off-by: Sasha Levin

selftests/powerpc: Make alignment handler test P9N DD2.1 vector CI load workaround

2020-10-19T21:00:42+00:00

alignment_handler currently only tests the unaligned cases but it can also be useful for testing the workaround for the P9N DD2.1 vector CI load issue fixed by p9_hmi_special_emu(). This workaround was introduced in 5080332c2c89 ("powerpc/64s: Add workaround for P9 vector CI load issue"). This changes the loop to start from offset 0 rather than 1 so that we test the kernel emulation in p9_hmi_special_emu(). Signed-off-by: Michael Neuling Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201013043741.743413-2-mikey@neuling.org

selftests/powerpc: Fix prefixes in alignment_handler signal handler

2020-09-08T12:24:20+00:00

The signal handler in the alignment handler self test has the ability to jump over the instruction that triggered the signal. It does this by incrementing the PT_NIP in the user context by 4. If it were a prefixed instruction this will mean that the suffix is then executed which is incorrect. Instead check if the major opcode indicates a prefixed instruction (e.g. it is 1) and if so increment PT_NIP by 8. If ISA v3.1 is not available treat it as a word instruction even if the major opcode is 1. Fixes: 620a6473df36 ("selftests/powerpc: Add prefixed loads/stores to alignment_handler test") Signed-off-by: Jordan Niethe [mpe: Fix 32-bit build, rename haveprefixes to prefixes_enabled] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200824131231.14008-1-jniethe5@gmail.com

selftests/powerpc: Include asm/cputable.h from utils.h

2020-09-08T12:23:59+00:00

utils.h provides have_hwcap() and have_hwcap2() which check for a feature bit. Those bits are defined in asm/cputable.h, so include it in utils.h so users of utils.h don't have to do it manually. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200819015727.1977134-4-mpe@ellerman.id.au

selftests/powerpc: Add prefixed loads/stores to alignment_handler test

2020-06-22T04:18:45+00:00

Extend the alignment handler selftest to exercise prefixed load store instructions. Add tests for prefixed VSX, floating point and integer instructions. Skip prefix tests if ISA version does not support prefixed instructions. Signed-off-by: Jordan Niethe Tested-by: Alistair Popple [mpe: Fixup PPC_FEATURE2_ARCH_3_1 naming as noted by Alistair] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200520021103.19798-2-jniethe5@gmail.com

selftests/powerpc: Allow choice of CI memory location in alignment_handler test

2020-06-22T00:37:59+00:00

The alignment handler selftest needs cache-inhibited memory and currently /dev/fb0 is relied on to provided this. This prevents running the test on systems without /dev/fb0 (e.g., mambo). Read the commandline arguments for an optional path to be used instead, as well as an optional offset to be for mmaping this path. Signed-off-by: Jordan Niethe Tested-by: Alistair Popple Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200520021103.19798-1-jniethe5@gmail.com

.gitignore: add SPDX License Identifier

2020-03-25T10:50:48+00:00

Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

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

2019-05-30T18:26:32+00:00

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

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

selftests/powerpc: Fix Makefiles for headers_install change

2018-09-28T05:07:45+00:00

Commit b2d35fa5fc80 ("selftests: add headers_install to lib.mk") introduced a requirement that Makefiles more than one level below the selftests directory need to define top_srcdir, but it didn't update any of the powerpc Makefiles. This broke building all the powerpc selftests with eg: make[1]: Entering directory '/src/linux/tools/testing/selftests/powerpc' BUILD_TARGET=/src/linux/tools/testing/selftests/powerpc/alignment; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C alignment all make[2]: Entering directory '/src/linux/tools/testing/selftests/powerpc/alignment' ../../lib.mk:20: ../../../../scripts/subarch.include: No such file or directory make[2]: *** No rule to make target '../../../../scripts/subarch.include'. make[2]: Failed to remake makefile '../../../../scripts/subarch.include'. Makefile:38: recipe for target 'alignment' failed Fix it by setting top_srcdir in the affected Makefiles. Fixes: b2d35fa5fc80 ("selftests: add headers_install to lib.mk") Signed-off-by: Michael Ellerman