kernel/linux.git/tools/testing/selftests/powerpc, branch v6.7.3

selftests/powerpc: Fix error handling in FPU/VMX preemption tests

2024-01-25T23:44:38+00:00

[ Upstream commit 9dbd5927408c4a0707de73ae9dd9306b184e8fee ] The FPU & VMX preemption tests do not check for errors returned by the low-level asm routines, preempt_fpu() / preempt_vsx() respectively. That means any register corruption detected by the asm routines does not result in a test failure. Fix it by returning the return value of the asm routines from the pthread child routines. Fixes: e5ab8be68e44 ("selftests/powerpc: Test preservation of FPU and VMX regs across preemption") Signed-off-by: Michael Ellerman Link: https://msgid.link/20231128132748.1990179-1-mpe@ellerman.id.au Signed-off-by: Sasha Levin

selftests/powerpc: Fix emit_tests to work with run_kselftest.sh

2023-09-22T10:29:48+00:00

In order to use run_kselftest.sh the list of tests must be emitted to populate kselftest-list.txt. The powerpc Makefile is written to use EMIT_TESTS. But support for EMIT_TESTS was dropped in commit d4e59a536f50 ("selftests: Use runner.sh for emit targets"). Although prior to that commit a548de0fe8e1 ("selftests: lib.mk: add test execute bit check to EMIT_TESTS") had already broken run_kselftest.sh for powerpc due to the executable check using the wrong path. It can be fixed by replacing the EMIT_TESTS definitions with actual emit_tests rules in the powerpc Makefiles. This makes run_kselftest.sh able to run powerpc tests: $ cd linux $ export ARCH=powerpc $ export CROSS_COMPILE=powerpc64le-linux-gnu- $ make headers $ make -j -C tools/testing/selftests install $ grep -c "^powerpc" tools/testing/selftests/kselftest_install/kselftest-list.txt 182 Fixes: d4e59a536f50 ("selftests: Use runner.sh for emit targets") Signed-off-by: Michael Ellerman Link: https://msgid.link/20230921072623.828772-1-mpe@ellerman.id.au

powerpc/pseries: Move VPHN constants into vphn.h

2023-08-24T12:33:16+00:00

These don't have any particularly good reason to belong in lppaca.h, move them into their own header. Signed-off-by: Michael Ellerman Link: https://msgid.link/20230823055317.751786-1-mpe@ellerman.id.au

selftests/powerpc: add const qualification where possible

2023-08-18T07:03:15+00:00

Various char * parameters in the common powerpc selftest APIs can be const. Signed-off-by: Nathan Lynch Signed-off-by: Michael Ellerman Link: https://msgid.link/20230817-powerpc-selftest-misc-v1-2-a84cc1ef78b2@linux.ibm.com

powerpc/selftests: sort mm/.gitignore, add exec_prot

2023-08-18T07:03:15+00:00

Add exec_prot to to mm/.gitignore and sort the result. Signed-off-by: Nathan Lynch Signed-off-by: Michael Ellerman Link: https://msgid.link/20230817-powerpc-selftest-misc-v1-1-a84cc1ef78b2@linux.ibm.com

selftests/powerpc/ptrace: Update ptrace-perf watchpoint selftest

2023-08-16T13:54:50+00:00

Now that ptrace and perf are no longer exclusive, update the test to exercise interesting interactions. An assembly file is used for the children to allow precise instruction choice and addresses, while avoiding any compiler quirks. Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://msgid.link/20230801011744.153973-7-bgray@linux.ibm.com

powerpc: replace #include with #include

2023-08-16T13:54:48+00:00

Commit ddb5cdbafaaa ("kbuild: generate KSYMTAB entries by modpost") deprecated , which is now a wrapper of . Replace #include with #include . After all the lines are converted, and will be removed. Signed-off-by: Masahiro Yamada [mpe: Fixup selftests that stub asm/export.h] Signed-off-by: Michael Ellerman Link: https://msgid.link/20230806150954.394189-2-masahiroy@kernel.org

selftests/powerpc/ptrace: Declare test temporary variables as volatile

2023-08-02T12:22:19+00:00

While the target is volatile, the temporary variables used to access the target cast away the volatile. This is undefined behaviour, and a compiler may optimise away/reorder these accesses, breaking the test. This was observed with GCC 13.1.1, but it can be difficult to reproduce because of the dependency on compiler behaviour. Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://msgid.link/20230725005841.28854-5-bgray@linux.ibm.com

selftests/powerpc/ptrace: Fix typo in pid_max search error

2023-08-02T12:22:19+00:00

pid_max_addr() searches for the 'pid_max' symbol in /proc/kallsyms, and prints an error if it cannot find it. The error message has a typo, calling it pix_max. Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://msgid.link/20230725005841.28854-4-bgray@linux.ibm.com

selftests/powerpc/ptrace: Explain why tests are skipped

2023-08-02T12:22:19+00:00

Many tests require specific hardware features/configurations that a typical machine might not have. As a result, it's common to see a test is skipped. But it is tedious to find out why a test is skipped when all it gives is the file location of the skip macro. Convert SKIP_IF() to SKIP_IF_MSG(), with appropriate descriptions of why the test is being skipped. This gives a general idea of why a test is skipped, which can be looked into further if it doesn't make sense. Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://msgid.link/20230725005841.28854-3-bgray@linux.ibm.com