kernel/tools/testing/selftests/powerpc/include/reg.h, branch linux-5.1.y

selftests/powerpc: New TM signal self test

2019-01-15T00:17:09Z

A new self test that forces MSR[TS] to be set without calling any TM instruction. This test also tries to cause a page fault at a signal handler, exactly between MSR[TS] set and tm_recheckpoint(), forcing thread->texasr to be rewritten with TEXASR[FS] = 0, which will cause a BUG when tm_recheckpoint() is called. This test is not deterministic, since it is hard to guarantee that the page access will cause a page fault. In order to force more page faults at signal context, the signal handler and the ucontext are being mapped into a MADV_DONTNEED memory chunks. Tests have shown that the bug could be exposed with few interactions in a buggy kernel. This test is configured to loop 5000x, having a good chance to hit the kernel issue in just one run. This self test takes less than two seconds to run. This test uses set/getcontext because the kernel will recheckpoint zeroed structures, causing the test to segfault, which is undesired because the test needs to rerun, so, there is a signal handler for SIGSEGV which will restart the test. v2: Uses the MADV_DONTNEED memory advice v3: Fix memcpy and 32-bits compilation v4: Does not define unused macros Signed-off-by: Breno Leitao Signed-off-by: Michael Ellerman

selftests/powerpc: Add a test of wild bctr

2018-10-20T02:26:47Z

This tests that a bctr (Branch to counter and link), ie. a function call, to a wildly out-of-bounds address is handled correctly. Some old kernel versions didn't handle it correctly, see eg: "powerpc/slb: Force a full SLB flush when we insert for a bad EA" https://lists.ozlabs.org/pipermail/linuxppc-dev/2017-April/157397.html Signed-off-by: Michael Ellerman

selftests/powerpc: Add ptrace tests for Protection Key registers

2018-05-28T08:46:35Z

This test exercises read and write access to the AMR, IAMR and UAMOR. Signed-off-by: Thiago Jung Bauermann [mpe: Simplify make rule] Signed-off-by: Michael Ellerman

selftests/powerpc: Add ptrace tests for GPR/FPR registers

2016-11-17T06:11:48Z

This patch adds ptrace interface test for GPR/FPR registers. This adds ptrace interface based helper functions related to GPR/FPR access and some assembly helper functions related to GPR/FPR registers. Signed-off-by: Anshuman Khandual Signed-off-by: Simon Guo [mpe: Add #defines for the new note types when headers don't define them] Signed-off-by: Michael Ellerman

selftests/powerpc: Move shared headers into new include dir

2016-11-17T06:11:47Z

There are some functions, especially register related, which can be shared across multiple selftests/powerpc test directories. This patch creates a new include directory to store those shared files, so that the file layout becomes more neat. Signed-off-by: Simon Guo [mpe: Reworked to move the headers only] Signed-off-by: Michael Ellerman