[PATCH v4 08/25] tools/testing/vma: add simple test for append_vma_flags()

["Lorenzo Stoakes (Oracle)" <ljs@kernel.org>]

Add a simple test for append_vma_flags() to assert that it behaves as
expected.

Additionally, include the VMA_REMAP_FLAGS definition in the VMA tests to
allow us to use this value in the testing.

Signed-off-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
---
 tools/testing/vma/include/dup.h |  3 +++
 tools/testing/vma/tests/vma.c   | 25 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/tools/testing/vma/include/dup.h b/tools/testing/vma/include/dup.h
index a2f311b5ea82..802b3d97b627 100644
--- a/tools/testing/vma/include/dup.h
+++ b/tools/testing/vma/include/dup.h
@@ -345,6 +345,9 @@ enum {
  */
 #define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP | VM_MIXEDMAP)
 
+#define VMA_REMAP_FLAGS mk_vma_flags(VMA_IO_BIT, VMA_PFNMAP_BIT,	\
+				     VMA_DONTEXPAND_BIT, VMA_DONTDUMP_BIT)
+
 #define DEFAULT_MAP_WINDOW	((1UL << 47) - PAGE_SIZE)
 #define TASK_SIZE_LOW		DEFAULT_MAP_WINDOW
 #define TASK_SIZE_MAX		DEFAULT_MAP_WINDOW
diff --git a/tools/testing/vma/tests/vma.c b/tools/testing/vma/tests/vma.c
index feea6d270233..98e465fb1bf2 100644
--- a/tools/testing/vma/tests/vma.c
+++ b/tools/testing/vma/tests/vma.c
@@ -555,6 +555,30 @@ static bool test_vma_flags_and(void)
 	return true;
 }
 
+/* Ensure append_vma_flags() acts as expected. */
+static bool test_append_vma_flags(void)
+{
+	vma_flags_t flags = append_vma_flags(VMA_REMAP_FLAGS, VMA_READ_BIT,
+					     VMA_WRITE_BIT
+#if NUM_VMA_FLAG_BITS > 64
+					     , 64, 65
+#endif
+		);
+
+	ASSERT_FLAGS_SAME(&flags, VMA_IO_BIT, VMA_PFNMAP_BIT,
+			  VMA_DONTEXPAND_BIT, VMA_DONTDUMP_BIT, VMA_READ_BIT,
+			  VMA_WRITE_BIT
+#if NUM_VMA_FLAG_BITS > 64
+					     , 64, 65
+#endif
+		);
+
+	flags = append_vma_flags(EMPTY_VMA_FLAGS, VMA_READ_BIT, VMA_WRITE_BIT);
+	ASSERT_FLAGS_SAME(&flags, VMA_READ_BIT, VMA_WRITE_BIT);
+
+	return true;
+}
+
 static void run_vma_tests(int *num_tests, int *num_fail)
 {
 	TEST(copy_vma);
@@ -569,4 +593,5 @@ static void run_vma_tests(int *num_tests, int *num_fail)
 	TEST(vma_flags_empty);
 	TEST(vma_flags_diff);
 	TEST(vma_flags_and);
+	TEST(append_vma_flags);
 }
-- 
2.53.0