kernel/tools/testing/selftests/powerpc/ptrace, branch linux-6.2.y

selftests/powerpc: Fix incorrect kernel headers search path

2023-03-10T08:29:37Z

commit 4f11410bf6da87defe8fd59b0413f0d9f71744da upstream. Use $(KHDR_INCLUDES) as lookup path for kernel headers. This prevents building against kernel headers from the build environment in scenarios where kernel headers are installed into a specific output directory (O=...). Cc: stable@vger.kernel.org # v5.18+ Signed-off-by: Mathieu Desnoyers Acked-by: Shuah Khan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20230127135755.79929-22-mathieu.desnoyers@efficios.com Signed-off-by: Greg Kroah-Hartman

selftests/powerpc: Add ptrace setup_core_pattern() null-terminator

2022-12-02T07:04:27Z

- malloc() does not zero the buffer, - fread() does not null-terminate it's output, - `cat /proc/sys/kernel/core_pattern | hexdump -C` shows the file is not inherently null-terminated So using string operations on the buffer is risky. Explicitly add a null character to the end to make it safer. Signed-off-by: Benjamin Gray Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20221128041948.58339-3-bgray@linux.ibm.com

selftests/powerpc: Use mfspr/mtspr macros

2022-12-02T07:04:27Z

No need to write inline asm for mtspr/mfspr, we have macros for this in reg.h Signed-off-by: Benjamin Gray Reviewed-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20221128041948.58339-2-bgray@linux.ibm.com

selftests/powerpc: Account for offline cpus in perf-hwbreak test

2022-11-30T10:46:47Z

For systemwide tests, use online cpu mask to only open events on online cpus. This enables this test to work on systems in lower SMT modes. Signed-off-by: Naveen N. Rao Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/15fd447dcefd19945a7d31f0a475349f548a3603.1669096083.git.naveen.n.rao@linux.vnet.ibm.com

selftests/powerpc: Bump up rlimit for perf-hwbreak test

2022-11-30T10:46:47Z

The systemwide perf hardware breakpoint test tries to open a perf event on each cpu. On large systems, we run out of file descriptors and fail the test. Instead, have the test set the file descriptor limit to an arbitraty high value. Reported-by: Rohan Deshpande Signed-off-by: Naveen N. Rao Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/187fed5843cecc1e5066677b6296ee88337d7bef.1669096083.git.naveen.n.rao@linux.vnet.ibm.com

selftests/powerpc: Move perror closer to its use

2022-11-30T10:46:47Z

Right now, if perf_event_open() fails for the systemwide tests, error report is printed too late, sometimes after subsequent system calls. Move use of perror() to the main function, just after the syscall. Signed-off-by: Naveen N. Rao Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/372ac78c27899f1f612fbd6ac796604a4a9310aa.1669096083.git.naveen.n.rao@linux.vnet.ibm.com

selftests/powerpc: Fix spelling mistake "mmaping" -> "mmapping"

2022-11-24T12:31:49Z

There is a spelling mistake in a perror message. Fix it. Signed-off-by: Colin Ian King Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20221021084545.65973-1-colin.i.king@gmail.com

selftests/powerpc/ptrace: Add peek/poke of FPRs

2022-07-25T02:05:16Z

Currently the ptrace-gpr test only tests the GET/SET(FP)REGS ptrace APIs. But there's an alternate (older) API, called PEEK/POKEUSR. Add some minimal testing of PEEK/POKEUSR of the FPRs. This is sufficient to detect the bug that was fixed recently in the 32-bit ptrace FPR handling. Depends-on: 8e1278444446 ("powerpc/32: Fix overread/overwrite of thread_struct via ptrace") Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220627140239.2464900-13-mpe@ellerman.id.au

selftests/powerpc/ptrace: Use more interesting values

2022-07-25T02:05:16Z

The ptrace-gpr test uses fixed values to test that registers can be read/written via ptrace. In particular it sets all GPRs to 1, which means the test could miss some types of bugs - eg. if the kernel was only returning the low word. So generate some random values at startup and use those instead. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220627140239.2464900-12-mpe@ellerman.id.au

selftests/powerpc/ptrace: Make child errors more obvious

2022-07-25T02:05:16Z

Use the FAIL_IF() macro so that errors in the child report a line number, rather than just silently exiting. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220627140239.2464900-11-mpe@ellerman.id.au