kernel/tools/testing/selftests/powerpc/mm/bad_accesses.c, branch linux-6.2.y

selftests/powerpc: Fix uninitialized variable warning

2020-12-03T14:01:21Z

Patch fixes uninitialized variable warning in bad_accesses test which causes the selftests build to fail in older distibutions bad_accesses.c: In function ‘bad_access’: bad_accesses.c:52:9: error: ‘x’ may be used uninitialized in this function [-Werror=maybe-uninitialized] printf("Bad - no SEGV! (%c)\n", x); ^ cc1: all warnings being treated as errors Signed-off-by: Harish Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201201092403.238182-1-harish@linux.ibm.com

selftests/powerpc: Give the bad_accesses test longer to run

2020-09-08T12:23:54Z

On older systems this test takes longer to run (duh), give it five minutes which is long enough on a G5 970FX @ 1.6GHz. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200819015727.1977134-2-mpe@ellerman.id.au

selftests/powerpc: Move Hash MMU check to utilities

2020-06-30T04:37:51Z

This moves a function to test if the MMU is in Hash mode under the generic test utilities. Signed-off-by: Sandipan Das Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200604125610.649668-3-sandipan@linux.ibm.com

selftests/powerpc: Add a test of bad (out-of-range) accesses

2020-01-06T05:25:27Z

Userspace isn't allowed to access certain address ranges, make sure we actually test that to at least some degree. This would have caught the recent bug where the SLB fault handler was incorrectly called on an out-of-range access when using the Radix MMU. It also would have caught the bug we had in get_region_id() where we were inserting SLB entries for bad addresses. Signed-off-by: Michael Ellerman Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190520102051.12103-1-mpe@ellerman.id.au