kernel/tools/testing/selftests/powerpc, branch linux-4.16.y

selftests/powerpc: Skip the subpage_prot tests if the syscall is unavailable

2018-03-02T00:37:04Z

The subpage_prot syscall is only functional when the system is using the Hash MMU. Since commit 5b2b80714796 ("powerpc/mm: Invalidate subpage_prot() system call on radix platforms") it returns ENOENT when the Radix MMU is active. Currently this just makes the test fail. Additionally the syscall is not available if the kernel is built with 4K pages, or if CONFIG_PPC_SUBPAGE_PROT=n, in which case it returns ENOSYS because the syscall is missing entirely. So check explicitly for ENOENT and ENOSYS and skip if we see either of those. Signed-off-by: Michael Ellerman

selftests/powerpc: Fix missing clean of pmu/lib.o

2018-02-28T11:28:35Z

The tm-resched-dscr test links against pmu/lib.o, but we don't have a rule to clean pmu/lib.o. This can lead to a build break if you build for big endian and then little, or vice versa. Fix it by making tm-resched-dscr depend on pmu/lib.c, causing the code to be built directly in, meaning no .o is generated. Signed-off-by: Michael Ellerman

selftests/powerpc: Skip tm-trap if transactional memory is not enabled

2018-02-26T02:18:25Z

Some processor revisions do not support transactional memory, and additionally kernel support can be disabled. In either case the tm-trap test should be skipped, otherwise it will fail with a SIGILL. Fixes: a08082f8e4e1 ("powerpc/selftests: Check endianness on trap in TM") Signed-off-by: Michael Ellerman

selftests/powerpc: Fix to use ucontext_t instead of struct ucontext

2018-02-13T11:44:18Z

With glibc 2.26 'struct ucontext' is removed to improve POSIX compliance, which breaks powerpc/alignment_handler selftest. Fix the test by using ucontext_t. Tested on ppc, works with older glibc versions as well. Fixes the following: alignment_handler.c: In function ‘sighandler’: alignment_handler.c:68:5: error: dereferencing pointer to incomplete type ‘struct ucontext’ ucp->uc_mcontext.gp_regs[PT_NIP] += 4; Signed-off-by: Harish Signed-off-by: Michael Ellerman

powerpc/selftests: Check endianness on trap in TM

2018-01-21T18:48:37Z

Add a selftest to check if endianness is flipped inadvertently to BE (MSR.LE set to zero) on BE and LE machines when a trap is caught in transactional mode and load_fp and load_vec are zero, i.e. when MSR.FP and MSR.VEC are zeroed (disabled). Signed-off-by: Gustavo Romero Signed-off-by: Michael Ellerman

selftests/powerpc: Add alignment handler selftest

2018-01-21T18:48:34Z

Add a selftest to exercise the powerpc alignment fault handler. Signed-off-by: Michael Neuling Signed-off-by: Andrew Donnellan [mpe: Add 32-bit support to the signal handler] Signed-off-by: Michael Ellerman

selftest/powerpc: Add additional option to mmap_bench test

2018-01-21T12:37:43Z

This patch adds --pgfault and --iterations options to mmap_bench test. With --pgfault we touch every page mapped. This helps in measuring impact in the page fault path with a patch series. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

selftests/powerpc: Add a test of SEGV error behaviour

2018-01-03T05:49:24Z

Add a test case of the error code reported when we take a SEGV on a mapped but inaccessible area. We broke this recently. Based on a test case from John Sperbeck . Acked-by: John Sperbeck Signed-off-by: Michael Ellerman

selftests/powerpc: Fix build errors in powerpc ptrace selftests

2017-12-11T02:03:37Z

GCC 7 will take "r2" in clobber list as an error and it will get following build errors for powerpc ptrace selftests even with -fno-pic option: ptrace-tm-vsx.c: In function ‘tm_vsx’: ptrace-tm-vsx.c:42:2: error: PIC register clobbered by ‘r2’ in ‘asm’ asm __volatile__( ^~~ make[1]: *** [ptrace-tm-vsx] Error 1 ptrace-tm-spd-vsx.c: In function ‘tm_spd_vsx’: ptrace-tm-spd-vsx.c:55:2: error: PIC register clobbered by ‘r2’ in ‘asm’ asm __volatile__( ^~~ make[1]: *** [ptrace-tm-spd-vsx] Error 1 ptrace-tm-spr.c: In function ‘tm_spr’: ptrace-tm-spr.c:46:2: error: PIC register clobbered by ‘r2’ in ‘asm’ asm __volatile__( ^~~ Fix the build error by removing "r2" from the clobber list. None of these asm blocks actually clobber r2. Reported-by: Seth Forshee Signed-off-by: Simon Guo Tested-by: Seth Forshee Signed-off-by: Michael Ellerman

selftests/powerpc: Check for pthread errors in tm-unavailable

2017-12-04T04:01:09Z

Signed-off-by: Cyril Bur Signed-off-by: Gustavo Romero Signed-off-by: Michael Ellerman