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> --- v1 -> v2: Integrated memmove_64 test within copyloops tests [v1]: https://patchwork.ozlabs.org/patch/1518082 .../selftests/powerpc/copyloops/.gitignore | 1 + .../selftests/powerpc/copyloops/Makefile | 9 ++- .../selftests/powerpc/copyloops/asm/ppc_asm.h | 1 + .../selftests/powerpc/copyloops/mem_64.S | 1 + .../powerpc/copyloops/memcpy_stubs.S | 8 +++ .../powerpc/copyloops/memmove_validate.c | 58 +++++++++++++++++++ 6 files changed, 77 insertions(+), 1 deletion(-) create mode 120000 tools/testing/selftests/powerpc/copyloops/mem_64.S create mode 100644 tools/testing/selftests/powerpc/copyloops/memcpy_stubs.S create mode 100644 tools/testing/selftests/powerpc/copyloops/memmove_validate.c diff --git a/tools/testing/selftests/powerpc/copyloops/.gitignore b/tools/testing/selftests/powerpc/copyloops/.gitignore index 994b11af765c..7283e8b07b75 100644 --- a/tools/testing/selftests/powerpc/copyloops/.gitignore +++ b/tools/testing/selftests/powerpc/copyloops/.gitignore @@ -13,3 +13,4 @@ copyuser_64_exc_t0 copyuser_64_exc_t1 copyuser_64_exc_t2 copy_mc_64 +memmove_64 diff --git a/tools/testing/selftests/powerpc/copyloops/Makefile b/tools/testing/selftests/powerpc/copyloops/Makefile index 3095b1f1c02b..77594e697f2f 100644 --- a/tools/testing/selftests/powerpc/copyloops/Makefile +++ b/tools/testing/selftests/powerpc/copyloops/Makefile @@ -13,7 +13,8 @@ TEST_GEN_PROGS := copyuser_64_t0 copyuser_64_t1 copyuser_64_t2 \ copyuser_p7_t0 copyuser_p7_t1 \ memcpy_64_t0 memcpy_64_t1 memcpy_64_t2 \ memcpy_p7_t0 memcpy_p7_t1 copy_mc_64 \ - copyuser_64_exc_t0 copyuser_64_exc_t1 copyuser_64_exc_t2 + copyuser_64_exc_t0 copyuser_64_exc_t1 copyuser_64_exc_t2 \ + memmove_64 EXTRA_SOURCES := validate.c ../harness.c stubs.S @@ -56,3 +57,9 @@ $(OUTPUT)/copyuser_64_exc_t%: copyuser_64.S exc_validate.c ../harness.c \ -D COPY_LOOP=test___copy_tofrom_user_base \ -D SELFTEST_CASE=$(subst copyuser_64_exc_t,,$(notdir $@)) \ -o $@ $^ + +$(OUTPUT)/memmove_64: mem_64.S memcpy_64.S memmove_validate.c ../harness.c \ + memcpy_stubs.S + $(CC) $(CPPFLAGS) $(CFLAGS) \ + -D TEST_MEMMOVE=test_memmove \ + -o $@ $^ diff --git a/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h b/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h index 58c1cef3e399..003e1b3d9300 100644 --- a/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h +++ b/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h @@ -26,6 +26,7 @@ #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 diff --git a/tools/testing/selftests/powerpc/copyloops/mem_64.S b/tools/testing/selftests/powerpc/copyloops/mem_64.S new file mode 120000 index 000000000000..db254c9a5f5c --- /dev/null +++ b/tools/testing/selftests/powerpc/copyloops/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/copyloops/memcpy_stubs.S b/tools/testing/selftests/powerpc/copyloops/memcpy_stubs.S new file mode 100644 index 000000000000..d9baa832fa49 --- /dev/null +++ b/tools/testing/selftests/powerpc/copyloops/memcpy_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/copyloops/memmove_validate.c b/tools/testing/selftests/powerpc/copyloops/memmove_validate.c new file mode 100644 index 000000000000..1a23218b5757 --- /dev/null +++ b/tools/testing/selftests/powerpc/copyloops/memmove_validate.c @@ -0,0 +1,58 @@ +// 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
