While debugging an issue, we wanted to check whether the arch specific
kernel memmove implementation is correct. This selftest could help test that.
Suggested-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
Suggested-by: Vaibhav Jain <vaib...@linux.ibm.com>
Signed-off-by: Ritesh Harjani <rite...@linux.ibm.com>
---
tools/testing/selftests/powerpc/Makefile | 1 +
.../selftests/powerpc/memmoveloop/.gitignore | 2 +
.../selftests/powerpc/memmoveloop/Makefile | 19 +++++++
.../powerpc/memmoveloop/asm/asm-compat.h | 0
.../powerpc/memmoveloop/asm/export.h | 4 ++
.../powerpc/memmoveloop/asm/feature-fixups.h | 0
.../selftests/powerpc/memmoveloop/asm/kasan.h | 0
.../powerpc/memmoveloop/asm/ppc_asm.h | 39 +++++++++++++
.../powerpc/memmoveloop/asm/processor.h | 0
.../selftests/powerpc/memmoveloop/mem_64.S | 1 +
.../selftests/powerpc/memmoveloop/memcpy_64.S | 1 +
.../selftests/powerpc/memmoveloop/stubs.S | 8 +++
.../selftests/powerpc/memmoveloop/validate.c | 56 +++++++++++++++++++
13 files changed, 131 insertions(+)
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/.gitignore
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/Makefile
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/asm/asm-compat.h
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/asm/export.h
create mode 100644
tools/testing/selftests/powerpc/memmoveloop/asm/feature-fixups.h
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/asm/kasan.h
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/asm/ppc_asm.h
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/asm/processor.h
create mode 120000 tools/testing/selftests/powerpc/memmoveloop/mem_64.S
create mode 120000 tools/testing/selftests/powerpc/memmoveloop/memcpy_64.S
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/stubs.S
create mode 100644 tools/testing/selftests/powerpc/memmoveloop/validate.c
diff --git a/tools/testing/selftests/powerpc/Makefile
b/tools/testing/selftests/powerpc/Makefile
index 0830e63818c1..d110b3e5cbcd 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -16,6 +16,7 @@ export CFLAGS
SUB_DIRS = alignment \
benchmarks \
cache_shape \
+ memmoveloop \
copyloops \
dscr \
mm \
diff --git a/tools/testing/selftests/powerpc/memmoveloop/.gitignore
b/tools/testing/selftests/powerpc/memmoveloop/.gitignore
new file mode 100644
index 000000000000..56c1426013d5
--- /dev/null
+++ b/tools/testing/selftests/powerpc/memmoveloop/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+memmove_64
diff --git a/tools/testing/selftests/powerpc/memmoveloop/Makefile
b/tools/testing/selftests/powerpc/memmoveloop/Makefile
new file mode 100644
index 000000000000..d58d8c100099
--- /dev/null
+++ b/tools/testing/selftests/powerpc/memmoveloop/Makefile
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+CFLAGS += -m64
+CFLAGS += -I$(CURDIR)
+CFLAGS += -D SELFTEST
+CFLAGS += -maltivec
+
+ASFLAGS = $(CFLAGS) -Wa,-mpower4
+
+TEST_GEN_PROGS := memmove_64
+EXTRA_SOURCES := validate.c ../harness.c stubs.S
+CPPFLAGS += -D TEST_MEMMOVE=test_memmove
+
+top_srcdir = ../../../../..
+include ../../lib.mk
+
+$(OUTPUT)/memmove_64: mem_64.S memcpy_64.S $(EXTRA_SOURCES)
+ $(CC) $(CPPFLAGS) $(CFLAGS) \
+ -D TEST_MEMMOVE=test_memmove \
+ -o $@ $^
diff --git a/tools/testing/selftests/powerpc/memmoveloop/asm/asm-compat.h
b/tools/testing/selftests/powerpc/memmoveloop/asm/asm-compat.h
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/tools/testing/selftests/powerpc/memmoveloop/asm/export.h
b/tools/testing/selftests/powerpc/memmoveloop/asm/export.h
new file mode 100644
index 000000000000..e6b80d5fbd14
--- /dev/null
+++ b/tools/testing/selftests/powerpc/memmoveloop/asm/export.h
@@ -0,0 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#define EXPORT_SYMBOL(x)
+#define EXPORT_SYMBOL_GPL(x)
+#define EXPORT_SYMBOL_KASAN(x)
diff --git a/tools/testing/selftests/powerpc/memmoveloop/asm/feature-fixups.h
b/tools/testing/selftests/powerpc/memmoveloop/asm/feature-fixups.h
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/tools/testing/selftests/powerpc/memmoveloop/asm/kasan.h
b/tools/testing/selftests/powerpc/memmoveloop/asm/kasan.h
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/tools/testing/selftests/powerpc/memmoveloop/asm/ppc_asm.h
b/tools/testing/selftests/powerpc/memmoveloop/asm/ppc_asm.h
new file mode 100644
index 000000000000..117005c56e19
--- /dev/null
+++ b/tools/testing/selftests/powerpc/memmoveloop/asm/ppc_asm.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __SELFTESTS_POWERPC_PPC_ASM_H
+#define __SELFTESTS_POWERPC_PPC_ASM_H
+#include <ppc-asm.h>
+
+#define CONFIG_ALTIVEC
+
+#define r1 1
+
+#define R14 r14
+#define R15 r15
+#define R16 r16
+#define R17 r17
+#define R18 r18
+#define R19 r19
+#define R20 r20
+#define R21 r21
+#define R22 r22
+#define R29 r29
+#define R30 r30
+#define R31 r31
+
+#define STACKFRAMESIZE 256
+#define STK_REG(i) (112 + ((i)-14)*8)
+
+#define _GLOBAL(A) FUNC_START(test_ ## A)
+#define _GLOBAL_TOC(A) _GLOBAL(A)
+#define _GLOBAL_TOC_KASAN(A) _GLOBAL(A)
+#define _GLOBAL_KASAN(A) _GLOBAL(A)
+
+#define PPC_MTOCRF(A, B) mtocrf A, B
+
+#define BEGIN_FTR_SECTION
+#define FTR_SECTION_ELSE
+#define ALT_FTR_SECTION_END_IFCLR(x)
+#define ALT_FTR_SECTION_END(x, y)
+#define END_FTR_SECTION_IFCLR(x)
+
+#endif /* __SELFTESTS_POWERPC_PPC_ASM_H */
diff --git a/tools/testing/selftests/powerpc/memmoveloop/asm/processor.h
b/tools/testing/selftests/powerpc/memmoveloop/asm/processor.h
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/tools/testing/selftests/powerpc/memmoveloop/mem_64.S
b/tools/testing/selftests/powerpc/memmoveloop/mem_64.S
new file mode 120000
index 000000000000..db254c9a5f5c
--- /dev/null
+++ b/tools/testing/selftests/powerpc/memmoveloop/mem_64.S
@@ -0,0 +1 @@
+../../../../../arch/powerpc/lib/mem_64.S
\ No newline at end of file
diff --git a/tools/testing/selftests/powerpc/memmoveloop/memcpy_64.S
b/tools/testing/selftests/powerpc/memmoveloop/memcpy_64.S
new file mode 120000
index 000000000000..cce33fb6f9d8
--- /dev/null
+++ b/tools/testing/selftests/powerpc/memmoveloop/memcpy_64.S
@@ -0,0 +1 @@
+../../../../../arch/powerpc/lib/memcpy_64.S
\ No newline at end of file
diff --git a/tools/testing/selftests/powerpc/memmoveloop/stubs.S
b/tools/testing/selftests/powerpc/memmoveloop/stubs.S
new file mode 100644
index 000000000000..d9baa832fa49
--- /dev/null
+++ b/tools/testing/selftests/powerpc/memmoveloop/stubs.S
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <asm/ppc_asm.h>
+
+FUNC_START(memcpy)
+ b test_memcpy
+
+FUNC_START(backwards_memcpy)
+ b test_backwards_memcpy
diff --git a/tools/testing/selftests/powerpc/memmoveloop/validate.c
b/tools/testing/selftests/powerpc/memmoveloop/validate.c
new file mode 100644
index 000000000000..52f7d32bb3fe
--- /dev/null
+++ b/tools/testing/selftests/powerpc/memmoveloop/validate.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <malloc.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include "utils.h"
+
+void *TEST_MEMMOVE(const void *s1, const void *s2, size_t n);
+
+#define BUF_LEN 65536
+#define MAX_OFFSET 512
+
+size_t max(size_t a, size_t b)
+{
+ if (a >= b) return a;
+ return b;
+}
+
+static int testcase_run(void)
+{
+ size_t i, src_off, dst_off, len;
+
+ char *usermap = memalign(BUF_LEN, BUF_LEN);
+ char *kernelmap = memalign(BUF_LEN, BUF_LEN);
+
+ assert(usermap != NULL);
+ assert(kernelmap != NULL);
+
+ memset(usermap, 0, BUF_LEN);
+ memset(kernelmap, 0, BUF_LEN);
+
+ for (i = 0; i < BUF_LEN; i++) {
+ usermap[i] = i & 0xff;
+ kernelmap[i] = i & 0xff;
+ }
+
+ for (src_off = 0; src_off < MAX_OFFSET; src_off++) {
+ for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) {
+ for (len = 1; len < MAX_OFFSET - max(src_off, dst_off);
len++) {
+
+ memmove(usermap + dst_off, usermap + src_off,
len);
+ TEST_MEMMOVE(kernelmap + dst_off, kernelmap +
src_off, len);
+ if (memcmp(usermap, kernelmap, MAX_OFFSET) !=
0) {
+ printf("memmove failed at %ld %ld
%ld\n", src_off, dst_off, len);
+ abort();
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(testcase_run, "memmove");
+}
--
2.31.1
