linux-stable.git/tools/testing/selftests/vm, branch v5.18.2

selftests: vm: Makefile: rename TARGETS to VMTARGETS

2022-05-10T00:34:29+00:00

The tools/testing/selftests/vm/Makefile uses the variable TARGETS
internally to generate a list of platform-specific binary build targets
suffixed with _{32,64}.  When building the selftests using its own
Makefile directly, such as via the following command run in a kernel tree:

One receives an error such as the following:

make: Entering directory '/root/linux/tools/testing/selftests'
make --no-builtin-rules ARCH=x86 -C ../../.. headers_install
make[1]: Entering directory '/root/linux'
  INSTALL ./usr/include
make[1]: Leaving directory '/root/linux'
make[1]: Entering directory '/root/linux/tools/testing/selftests/vm'
make[1]: *** No rule to make target 'vm.c', needed by '/root/linux/tools/testing/selftests/vm/vm_64'.  Stop.
make[1]: Leaving directory '/root/linux/tools/testing/selftests/vm'
make: *** [Makefile:175: all] Error 2
make: Leaving directory '/root/linux/tools/testing/selftests'

The TARGETS variable passed to tools/testing/selftests/Makefile collides
with the TARGETS used in tools/testing/selftests/vm/Makefile, so rename
the latter to VMTARGETS, eliminating the collision with no functional
change.

Link: https://lkml.kernel.org/r/20220504213454.1282532-1-jsavitz@redhat.com
Fixes: f21fda8f6453 ("selftests: vm: pkeys: fix multilib builds for x86")
Signed-off-by: Joel Savitz 
Acked-by: Nico Pache 
Cc: Joel Savitz 
Cc: Shuah Khan 
Cc: Sandipan Das 
Cc: Dave Hansen 
Signed-off-by: Andrew Morton

selftest/vm: add skip support to mremap_test

2022-04-22T03:01:10+00:00

Allow the mremap test to be skipped due to errors such as failing to
parse the mmap_min_addr sysctl.

Link: https://lkml.kernel.org/r/20220420215721.4868-4-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar 
Reviewed-by: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftest/vm: support xfail in mremap_test

2022-04-22T03:01:10+00:00

Use ksft_test_result_xfail for the tests which are expected to fail.

Link: https://lkml.kernel.org/r/20220420215721.4868-3-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar 
Reviewed-by: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftest/vm: verify remap destination address in mremap_test

2022-04-22T03:01:10+00:00

Because mremap does not have a MAP_FIXED_NOREPLACE flag, it can destroy
existing mappings.  This causes a segfault when regions such as text are
remapped and the permissions are changed.

Verify the requested mremap destination address does not overlap any
existing mappings by using mmap's MAP_FIXED_NOREPLACE flag.  Keep
incrementing the destination address until a valid mapping is found or
fail the current test once the max address is reached.

Link: https://lkml.kernel.org/r/20220420215721.4868-2-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar 
Reviewed-by: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftest/vm: verify mmap addr in mremap_test

2022-04-22T03:01:09+00:00

Avoid calling mmap with requested addresses that are less than the
system's mmap_min_addr.  When run as root, mmap returns EACCES when
trying to map addresses < mmap_min_addr.  This is not one of the error
codes for the condition to retry the mmap in the test.

Rather than arbitrarily retrying on EACCES, don't attempt an mmap until
addr > vm.mmap_min_addr.

Add a munmap call after an alignment check as the mappings are retained
after the retry and can reach the vm.max_map_count sysctl.

Link: https://lkml.kernel.org/r/20220420215721.4868-1-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar 
Reviewed-by: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests: kselftest framework: provide "finished" helper

2022-03-25T02:06:51+00:00

Instead of having each time that wants to use ksft_exit() have to figure
out the internals of kselftest.h, add the helper ksft_finished() that
makes sure the passes, xfails, and skips are equal to the test plan count.

Link: https://lkml.kernel.org/r/20220201013717.2464392-1-keescook@chromium.org
Signed-off-by: Kees Cook 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd/selftests: enable hugetlb remap and remove event testing

2022-03-25T02:06:50+00:00

With MADV_DONTNEED support added to hugetlb mappings, mremap testing can
also be enabled for hugetlb.

Modify the tests to use madvise MADV_DONTNEED and MADV_REMOVE instead of
fallocate hole puch for releasing hugetlb pages.

Link: https://lkml.kernel.org/r/20220215002348.128823-4-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz 
Reviewed-by: Axel Rasmussen 
Cc: Andrea Arcangeli 
Cc: David Hildenbrand 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Mina Almasry 
Cc: Naoya Horiguchi 
Cc: Peter Xu 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests/vm: add hugetlb madvise MADV_DONTNEED MADV_REMOVE test

2022-03-25T02:06:50+00:00

Now that MADV_DONTNEED support for hugetlb is enabled, add corresponding
tests.  MADV_REMOVE has been enabled for some time, but no tests exist so
add them as well.

Link: https://lkml.kernel.org/r/20220215002348.128823-3-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz 
Reviewed-by: Shuah Khan 
Cc: Andrea Arcangeli 
Cc: Axel Rasmussen 
Cc: David Hildenbrand 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Mina Almasry 
Cc: Naoya Horiguchi 
Cc: Peter Xu 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftest/vm: add helpers to detect PAGE_SIZE and PAGE_SHIFT

2022-03-25T02:06:45+00:00

PAGE_SIZE is not 4096 in many configurations, particularly ppc64 uses 64K
pages in majority of cases.

Add helpers to detect PAGE_SIZE and PAGE_SHIFT dynamically.

Without this tests are broken w.r.t reading /proc/self/pagemap

    if (pread(pagemap_fd, ent, sizeof(ent),
              (uintptr_t)ptr >> (PAGE_SHIFT - 3)) != sizeof(ent))
              err(2, "read pagemap");

Link: https://lkml.kernel.org/r/20220307054355.149820-2-aneesh.kumar@linux.ibm.com
Signed-off-by: Mike Rapoport 
Signed-off-by: Aneesh Kumar K.V 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftest/vm: add util.h and and move helper functions there

2022-03-25T02:06:45+00:00

Avoid code duplication by adding util.h.  No functional change in this
patch.

Link: https://lkml.kernel.org/r/20220307054355.149820-1-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V 
Cc: Shuah Khan 
Cc: Mike Rapoport 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds