[PATCH v4 0/5] kselftest: Extend vDSO tests

[Vincenzo Frascino]

This series extends the kselftests for the vDSO library making sure: that
they compile correctly on non x86 platforms, that they can be cross
compiled and introducing new tests that verify the correctness of the
library.

The so extended vDSO kselftests have been verified on all the platforms
supported by the unified vDSO library [1].

The only new patch that this series introduces is the first one, patch 2 and
patch 3 have already been reviewed in past as part of other series [2] [3].

[1] https://lore.kernel.org/lkml/20190621095252.32307-1-vincenzo.frascino@arm.com
[2] https://lore.kernel.org/lkml/20190621095252.32307-26-vincenzo.frascino@arm.com
[3] https://lore.kernel.org/lkml/20190523112116.19233-4-vincenzo.frascino@arm.com

It is possible to build the series using the command below:

make -C tools/testing/selftests/ ARCH=<arch> TARGETS=vDSO CC=<compiler>

A version of the series rebased on 5.10-rc1 to simplify the testing can be found
at [4].

[4] https://git.gitlab.arm.com/linux-arm/linux-vf.git vdso/v4.tests

Changes:
--------
v4:
  - Rebased on 5.10-rc1.
v3:
  - Added correctness test for clock_gettime64.
  - Rebased on 5.7-rc4.
v2:
  - Addressed review comments from Andy.
  - Rebased on 5.7-rc3.

Cc: Shuah Khan <shuah at kernel.org>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: Andy Lutomirski <luto at kernel.org>
Cc: Arnd Bergmann <arnd at arndb.de>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino at arm.com>

Vincenzo Frascino (5):
  kselftest: Enable vDSO test on non x86 platforms
  kselftest: Extend vDSO selftest
  kselftest: Extend vDSO selftest to clock_getres
  kselftest: Move test_vdso to the vDSO test suite
  kselftest: Extend vdso correctness test to clock_gettime64

 tools/testing/selftests/Makefile              |   1 +
 tools/testing/selftests/vDSO/Makefile         |  16 +-
 tools/testing/selftests/vDSO/vdso_config.h    |  92 +++++++
 tools/testing/selftests/vDSO/vdso_test_abi.c  | 244 ++++++++++++++++++
 .../selftests/vDSO/vdso_test_clock_getres.c   | 124 +++++++++
 .../vdso_test_correctness.c}                  | 115 ++++++++-
 tools/testing/selftests/x86/Makefile          |   2 +-
 7 files changed, 586 insertions(+), 8 deletions(-)
 create mode 100644 tools/testing/selftests/vDSO/vdso_config.h
 create mode 100644 tools/testing/selftests/vDSO/vdso_test_abi.c
 create mode 100644 tools/testing/selftests/vDSO/vdso_test_clock_getres.c
 rename tools/testing/selftests/{x86/test_vdso.c => vDSO/vdso_test_correctness.c} (73%)

-- 
2.28.0