linux-stable.git/tools/testing/selftests/arm64, branch linux-5.14.y

kselftest/arm64: signal: Skip tests if required features are missing

2021-09-30T08:13:00+00:00

[ Upstream commit 0e3dbf765fe22060acbcb8eb8c4d256e655a1247 ]

During initialization of a signal testcase, features declared as required
are properly checked against the running system but no action is then taken
to effectively skip such a testcase.

Fix core signals test logic to abort initialization and report such a
testcase as skipped to the KSelfTest framework.

Fixes: f96bf4340316 ("kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils")
Signed-off-by: Cristian Marussi 
Reviewed-by: Mark Brown 
Link: https://lore.kernel.org/r/20210920121228.35368-1-cristian.marussi@arm.com
Signed-off-by: Catalin Marinas 
Signed-off-by: Sasha Levin

kselftest/arm64: signal: Add SVE to the set of features we can check for

2021-09-30T08:12:59+00:00

[ Upstream commit d4e4dc4fab686c5f3f185272a19b83930664bef5 ]

Allow testcases for SVE signal handling to flag the dependency and be
skipped on systems without SVE support.

Signed-off-by: Mark Brown 
Link: https://lore.kernel.org/r/20210819134245.13935-2-broonie@kernel.org
Signed-off-by: Catalin Marinas 
Signed-off-by: Sasha Levin

kselftest/arm64: pac: Fix skipping of tests on systems without PAC

2021-09-18T11:43:53+00:00

[ Upstream commit 0c69bd2ca6ee20064dde7853cd749284e053a874 ]

The PAC tests check to see if the system supports the relevant PAC features
but instead of skipping the tests if they can't be executed they fail the
tests which makes things look like they're not working when they are.

Signed-off-by: Mark Brown 
Link: https://lore.kernel.org/r/20210819165723.43903-1-broonie@kernel.org
Signed-off-by: Catalin Marinas 
Signed-off-by: Sasha Levin

kselftest/arm64: mte: Fix misleading output when skipping tests

2021-09-18T11:43:53+00:00

[ Upstream commit 83e5dcbece4ea67ec3ad94b897e2844184802fd7 ]

When skipping the tests due to a lack of system support for MTE we
currently print a message saying FAIL which makes it look like the test
failed even though the test did actually report KSFT_SKIP, creating some
confusion. Change the error message to say SKIP instead so things are
clearer.

Signed-off-by: Mark Brown 
Link: https://lore.kernel.org/r/20210819172902.56211-1-broonie@kernel.org
Signed-off-by: Catalin Marinas 
Signed-off-by: Sasha Levin

kselftest/arm64: Add missing newline to SVE test skipping output

2021-05-25T18:19:29+00:00

The newline is expected to come from the caller but got missed for this
test.

Signed-off-by: Mark Brown 
Link: https://lore.kernel.org/r/20210518163331.38268-1-broonie@kernel.org
Signed-off-by: Will Deacon

kselftest/arm64: Add missing stddef.h include to BTI tests

2021-05-10T09:19:01+00:00

Explicitly include stddef.h when building the BTI tests so that we have
a definition of NULL, with at least some toolchains this is not done
implicitly by anything else:

test.c: In function ‘start’:
test.c:214:25: error: ‘NULL’ undeclared (first use in this function)
  214 |  sigaction(SIGILL, &sa, NULL);
      |                         ^~~~
test.c:20:1: note: ‘NULL’ is defined in header ‘’; did you forget to ‘#include ’?

Signed-off-by: Mark Brown 
Link: https://lore.kernel.org/r/20210507162542.23149-1-broonie@kernel.org
Signed-off-by: Catalin Marinas

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2021-04-26T17:25:03+00:00

Pull arm64 updates from Catalin Marinas:

- MTE asynchronous support for KASan. Previously only synchronous
(slower) mode was supported. Asynchronous is faster but does not
allow precise identification of the illegal access.

- Run kernel mode SIMD with softirqs disabled. This allows using NEON
in softirq context for crypto performance improvements. The
conditional yield support is modified to take softirqs into account
and reduce the latency.

- Preparatory patches for Apple M1: handle CPUs that only have the VHE
mode available (host kernel running at EL2), add FIQ support.

- arm64 perf updates: support for HiSilicon PA and SLLC PMU drivers,
new functions for the HiSilicon HHA and L3C PMU, cleanups.

- Re-introduce support for execute-only user permissions but only when
the EPAN (Enhanced Privileged Access Never) architecture feature is
available.

- Disable fine-grained traps at boot and improve the documented boot
requirements.

- Support CONFIG_KASAN_VMALLOC on arm64 (only with KASAN_GENERIC).

- Add hierarchical eXecute Never permissions for all page tables.

- Add arm64 prctl(PR_PAC_{SET,GET}_ENABLED_KEYS) allowing user programs
to control which PAC keys are enabled in a particular task.

- arm64 kselftests for BTI and some improvements to the MTE tests.

- Minor improvements to the compat vdso and sigpage.

- Miscellaneous cleanups.

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (86 commits)
arm64/sve: Add compile time checks for SVE hooks in generic functions
arm64/kernel/probes: Use BUG_ON instead of if condition followed by BUG.
arm64: pac: Optimize kernel entry/exit key installation code paths
arm64: Introduce prctl(PR_PAC_{SET,GET}_ENABLED_KEYS)
arm64: mte: make the per-task SCTLR_EL1 field usable elsewhere
arm64/sve: Remove redundant system_supports_sve() tests
arm64: fpsimd: run kernel mode NEON with softirqs disabled
arm64: assembler: introduce wxN aliases for wN registers
arm64: assembler: remove conditional NEON yield macros
kasan, arm64: tests supports for HW_TAGS async mode
arm64: mte: Report async tag faults before suspend
arm64: mte: Enable async tag check fault
arm64: mte: Conditionally compile mte_enable_kernel_*()
arm64: mte: Enable TCO in functions that can read beyond buffer limits
kasan: Add report for async mode
arm64: mte: Drop arch_enable_tagging()
kasan: Add KASAN mode kernel parameter
arm64: mte: Add asynchronous mode support
arm64: Get rid of CONFIG_ARM64_VHE
arm64: Cope with CPUs stuck in VHE mode
...

kselftest: arm64: Add BTI tests

2021-03-24T15:43:20+00:00

Add some tests that verify that BTI functions correctly for static binaries
built with and without BTI support, verifying that SIGILL is generated when
expected and is not generated in other situations.

Since BTI support is still being rolled out in distributions these tests
are built entirely free standing, no libc support is used at all so none
of the standard helper functions for kselftest can be used and we open
code everything. This also means we aren't testing the kernel support for
the dynamic linker, though the test program can be readily adapted for
that once it becomes something that we can reliably build and run.

These tests were originally written by Dave Martin, I've adapted them for
kselftest, mainly around the build system and the output format.

Signed-off-by: Mark Brown 
Cc: Dave Martin 
Link: https://lore.kernel.org/r/20210309193731.57247-1-broonie@kernel.org
Signed-off-by: Catalin Marinas

kselftest/arm64: mte: Report filename on failing temp file creation

2021-03-24T15:43:20+00:00

The MTE selftests create temporary files in /dev/shm, for later mmap-ing
them. When there is no tmpfs mounted on /dev/shm, or /dev/shm does not
exist in the first place (on minimal filesystems), the error message is
not giving good hints:
    # FAIL: Unable to open temporary file
    # FAIL: memory allocation
    not ok 17 Check initial tags with private mapping, ...

Add a perror() call, that gives both the filename and the actual error
reason, so that users get a chance of correcting that.

Signed-off-by: Andre Przywara 
Reviewed-by: Mark Brown 
Link: https://lore.kernel.org/r/20210319165334.29213-12-andre.przywara@arm.com
Signed-off-by: Catalin Marinas

kselftest/arm64: mte: Fix clang warning

2021-03-24T15:43:20+00:00

if (!prctl(...) == 0) is not only cumbersome to read, it also upsets
clang and triggers a warning:
------------
mte_common_util.c:287:6: warning: logical not is only applied to the
left hand side of this comparison [-Wlogical-not-parentheses]
....

Fix that by just comparing against "not 0" instead.

Signed-off-by: Andre Przywara 
Reviewed-by: Mark Brown 
Link: https://lore.kernel.org/r/20210319165334.29213-11-andre.przywara@arm.com
Signed-off-by: Catalin Marinas