selftests: mm: add pagemap ioctl tests

Add pagemap ioctl tests. Add several different types of tests to judge
the correction of the interface.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Muhammad Usama Anjum <[email protected]>
Cc: Alex Sierra <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Andrei Vagin <[email protected]>
Cc: Axel Rasmussen <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Gustavo A. R. Silva <[email protected]>
Cc: "Liam R. Howlett" <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Michal Miroslaw <[email protected]>
Cc: Michał Mirosław <[email protected]>
Cc: Mike Rapoport (IBM) <[email protected]>
Cc: Nadav Amit <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Paul Gofman <[email protected]>
Cc: Peter Xu <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Yun Zhou <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

tools/testing/selftests/mm/.gitignore

@@ -18,6 +18,8 @@ mremap_dontunmap
 mremap_test
 on-fault-limit
 transhuge-stress
+pagemap_ioctl
+*.tmp*
 protection_keys
 protection_keys_32
 protection_keys_64

tools/testing/selftests/mm/Makefile

@@ -33,7 +33,7 @@ endif
 MAKEFLAGS += --no-builtin-rules
 
 CFLAGS = -Wall -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES)
-LDLIBS = -lrt -lpthread
+LDLIBS = -lrt -lpthread -lm
 
 TEST_GEN_FILES = cow
 TEST_GEN_FILES += compaction_test
@@ -60,6 +60,7 @@ TEST_GEN_FILES += mrelease_test
 TEST_GEN_FILES += mremap_dontunmap
 TEST_GEN_FILES += mremap_test
 TEST_GEN_FILES += on-fault-limit
+TEST_GEN_PROGS += pagemap_ioctl
 TEST_GEN_FILES += thuge-gen
 TEST_GEN_FILES += transhuge-stress
 TEST_GEN_FILES += uffd-stress

tools/testing/selftests/mm/config

@@ -1,5 +1,6 @@
 CONFIG_SYSVIPC=y
 CONFIG_USERFAULTFD=y
+CONFIG_PTE_MARKER_UFFD_WP=y
 CONFIG_TEST_VMALLOC=m
 CONFIG_DEVICE_PRIVATE=y
 CONFIG_TEST_HMM=m

tools/testing/selftests/mm/run_vmtests.sh

@@ -56,6 +56,8 @@ separated by spaces:
 	memory protection key tests
 - soft_dirty
 	test soft dirty page bit semantics
+- pagemap
+	test pagemap_scan IOCTL
 - cow
 	test copy-on-write semantics
 - thp
@@ -342,6 +344,8 @@ then
 	CATEGORY="soft_dirty" run_test ./soft-dirty
 fi
 
+CATEGORY="pagemap" run_test ./pagemap_ioctl
+
 # COW tests
 CATEGORY="cow" run_test ./cow