linux/tools/testing/selftests/powerpc
Jordan Niethe 29e3ea8cbd selftests/powerpc: Test for spurious kernel memory faults on radix
Previously when mapping kernel memory on radix, no ptesync was
included which would periodically lead to unhandled spurious faults.
Mapping kernel memory is used when code patching with Strict RWX
enabled. As suggested by Chris Riedl, turning ftrace on and off does a
large amount of code patching so is a convenient way to see this kind
of fault.

Add a selftest to try and trigger this kind of a spurious fault. It
tests for 30 seconds which is usually long enough for the issue to
show up.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
[mpe: Rename it to better reflect what it does, rather than the symptom]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210208032957.1232102-2-jniethe5@gmail.com
2021-04-08 21:17:42 +10:00
..
alignment selftests/powerpc: Only test lwm/stmw on big endian 2021-01-20 11:49:55 +11:00
benchmarks selftests/powerpc: Don't touch VMX/VSX on older CPUs 2020-09-08 22:24:10 +10:00
cache_shape .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
copyloops x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}() 2020-10-06 11:18:04 +02:00
dscr selftests/powerpc: Don't run DSCR tests on old systems 2020-09-08 22:24:02 +10:00
eeh selftests/powerpc: Add VF recovery tests 2021-01-31 22:35:47 +11:00
include selftests/powerpc: refactor entry and rfi_flush tests 2020-11-19 23:47:23 +11:00
lib treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
math selftests/powerpc: Skip vmx/vsx/tar/etc tests on older CPUs 2020-08-03 22:12:41 +10:00
mm selftests/powerpc: Test for spurious kernel memory faults on radix 2021-04-08 21:17:42 +10:00
nx-gzip selftests/powerpc: update .gitignore 2020-12-04 01:01:21 +11:00
pmu selftests/powerpc: Skip L3 bank test on older CPUs 2020-09-08 22:24:08 +10:00
primitives .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
ptrace selftests/powerpc: Tests for kernel accessing user memory 2020-09-15 22:13:21 +10:00
scripts treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285 2019-06-05 17:36:37 +02:00
security selftests/powerpc: Fix L1D flushing tests for Power10 2021-03-24 14:09:29 +11:00
signal selftests/powerpc: update .gitignore 2020-12-04 01:01:21 +11:00
stringloops selftests/powerpc: Include asm/cputable.h from utils.h 2020-09-08 22:23:59 +10:00
switch_endian selftests/powerpc: Properly handle failure in switch_endian_test 2020-09-08 22:24:13 +10:00
syscalls selftests/powerpc: update .gitignore 2020-12-04 01:01:21 +11:00
tm selftests/powerpc: unmark non-kernel-doc comments 2021-03-29 13:22:18 +11:00
vphn .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
harness.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 191 2019-05-30 11:29:21 -07:00
Makefile selftests/powerpc: Add NX-GZIP engine compress testcase 2020-04-21 22:51:34 +10:00
utils.c selftests/powerpc: Move set_dscr() into rfi_flush.c 2020-09-08 22:23:57 +10:00