[PATCH 1/3] selftests/mm: allow PUD-level entries in compound testcase of hmm tests

[Aboorva Devarajan]

From: Sayali Patil <sayalip@xxxxxxxxxxxxx>

The HMM compound testcase currently assume only PMD-level
mappings and fail on systems when default_hugepagesz=1G is set.
Extend the checks to accept PUD-level protections as well,
avoiding false failures.

Fixes: e478425bec93 ("mm/hmm: add tests for hmm_pfn_to_map_order()")
Signed-off-by: Sayali Patil <sayalip@xxxxxxxxxxxxx>
Signed-off-by: Aboorva Devarajan <aboorvad@xxxxxxxxxxxxx>
---
 tools/testing/selftests/mm/hmm-tests.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/mm/hmm-tests.c b/tools/testing/selftests/mm/hmm-tests.c
index 77fb4c5d871b..6dc839866dfe 100644
--- a/tools/testing/selftests/mm/hmm-tests.c
+++ b/tools/testing/selftests/mm/hmm-tests.c
@@ -1599,8 +1599,8 @@ TEST_F(hmm2, snapshot)
 }
 
 /*
- * Test the hmm_range_fault() HMM_PFN_PMD flag for large pages that
- * should be mapped by a large page table entry.
+ * Test the hmm_range_fault() handling of large pages (PMD or PUD)
+ * that should be mapped by a large page table entry.
  */
 TEST_F(hmm, compound)
 {
@@ -1649,8 +1649,8 @@ TEST_F(hmm, compound)
 	/* Check what the device saw. */
 	m = buffer->mirror;
 	for (i = 0; i < npages; ++i)
-		ASSERT_EQ(m[i], HMM_DMIRROR_PROT_WRITE |
-				HMM_DMIRROR_PROT_PMD);
+		ASSERT_TRUE((m[i] == (HMM_DMIRROR_PROT_WRITE | HMM_DMIRROR_PROT_PMD)) ||
+			    (m[i] == (HMM_DMIRROR_PROT_WRITE | HMM_DMIRROR_PROT_PUD)));
 
 	/* Make the region read-only. */
 	ret = mprotect(buffer->ptr, size, PROT_READ);
@@ -1664,8 +1664,8 @@ TEST_F(hmm, compound)
 	/* Check what the device saw. */
 	m = buffer->mirror;
 	for (i = 0; i < npages; ++i)
-		ASSERT_EQ(m[i], HMM_DMIRROR_PROT_READ |
-				HMM_DMIRROR_PROT_PMD);
+		ASSERT_TRUE((m[i] == (HMM_DMIRROR_PROT_READ | HMM_DMIRROR_PROT_PMD)) ||
+			    (m[i] == (HMM_DMIRROR_PROT_READ | HMM_DMIRROR_PROT_PUD)));
 
 	munmap(buffer->ptr, buffer->size);
 	buffer->ptr = NULL;
-- 
2.54.0