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From: Joey Gouly <joey.gouly@arm.com>
To: <linux-arm-kernel@lists.infradead.org>
Cc: <nd@arm.com>, <broonie@kernel.org>, <catalin.marinas@arm.com>,
	<joey.gouly@arm.com>, <shuah@kernel.org>, <will@kernel.org>
Subject: [PATCH v2 1/6] kselftest/arm64: mte: user_mem: introduce tag_offset and tag_len
Date: Thu, 3 Feb 2022 14:36:15 +0000	[thread overview]
Message-ID: <20220203143620.30629-2-joey.gouly@arm.com> (raw)
In-Reply-To: <20220203143620.30629-1-joey.gouly@arm.com>

These can be used to place a different tag not at a page size boundary.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
---
 .../selftests/arm64/mte/check_user_mem.c      | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/arm64/mte/check_user_mem.c b/tools/testing/selftests/arm64/mte/check_user_mem.c
index 1de7a0abd0ae..5a5a7e1f5789 100644
--- a/tools/testing/selftests/arm64/mte/check_user_mem.c
+++ b/tools/testing/selftests/arm64/mte/check_user_mem.c
@@ -19,7 +19,8 @@
 
 static size_t page_sz;
 
-static int check_usermem_access_fault(int mem_type, int mode, int mapping)
+static int check_usermem_access_fault(int mem_type, int mode, int mapping,
+                                      int tag_offset, int tag_len)
 {
 	int fd, i, err;
 	char val = 'A';
@@ -54,10 +55,12 @@ static int check_usermem_access_fault(int mem_type, int mode, int mapping)
 	if (i < len)
 		goto usermem_acc_err;
 
-	/* Tag the next half of memory with different value */
-	ptr_next = (void *)((unsigned long)ptr + page_sz);
+	if (!tag_len)
+		tag_len = len - tag_offset;
+	/* Tag a part of memory with different value */
+	ptr_next = (void *)((unsigned long)ptr + tag_offset);
 	ptr_next = mte_insert_new_tag(ptr_next);
-	mte_set_tag_address_range(ptr_next, page_sz);
+	mte_set_tag_address_range(ptr_next, tag_len);
 
 	lseek(fd, 0, 0);
 	/* Copy from file into buffer with invalid tag */
@@ -100,14 +103,14 @@ int main(int argc, char *argv[])
 	/* Set test plan */
 	ksft_set_plan(4);
 
-	evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_SYNC_ERR, MAP_PRIVATE),
+	evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_SYNC_ERR, MAP_PRIVATE, page_sz, 0),
 		"Check memory access from kernel in sync mode, private mapping and mmap memory\n");
-	evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_SYNC_ERR, MAP_SHARED),
+	evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_SYNC_ERR, MAP_SHARED, page_sz, 0),
 		"Check memory access from kernel in sync mode, shared mapping and mmap memory\n");
 
-	evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_ASYNC_ERR, MAP_PRIVATE),
+	evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_ASYNC_ERR, MAP_PRIVATE, page_sz, 0),
 		"Check memory access from kernel in async mode, private mapping and mmap memory\n");
-	evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_ASYNC_ERR, MAP_SHARED),
+	evaluate_test(check_usermem_access_fault(USE_MMAP, MTE_ASYNC_ERR, MAP_SHARED, page_sz, 0),
 		"Check memory access from kernel in async mode, shared mapping and mmap memory\n");
 
 	mte_restore_setup();
-- 
2.17.1


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  reply	other threads:[~2022-02-03 14:38 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-03 14:36 [PATCH v2 0/6] add more tests to MTE kselftests Joey Gouly
2022-02-03 14:36 ` Joey Gouly [this message]
2022-02-04 15:51   ` [PATCH v2 1/6] kselftest/arm64: mte: user_mem: introduce tag_offset and tag_len Shuah Khan
2022-02-03 14:36 ` [PATCH v2 2/6] kselftest/arm64: mte: user_mem: rework error handling Joey Gouly
2022-02-04 15:54   ` Shuah Khan
2022-02-03 14:36 ` [PATCH v2 3/6] kselftest/arm64: mte: user_mem: check different offsets and sizes Joey Gouly
2022-02-04 15:57   ` Shuah Khan
2022-02-03 14:36 ` [PATCH v2 4/6] kselftest/arm64: mte: user_mem: add test type enum Joey Gouly
2022-02-04 15:59   ` Shuah Khan
2022-02-03 14:36 ` [PATCH v2 5/6] kselftest/arm64: mte: user_mem: add more test types Joey Gouly
2022-02-04 16:01   ` Shuah Khan
2022-02-03 14:36 ` [PATCH v2 6/6] kselftest/arm64: mte: user_mem: test more combinations of values Joey Gouly
2022-02-04 16:02   ` Shuah Khan
2022-02-04 14:18 ` [PATCH v2 0/6] add more tests to MTE kselftests Mark Brown
2022-02-04 16:06 ` Shuah Khan

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