Add a test which verifies that NT_ARM_SVE and NT_ARM_SSVE reads and writes
are rejected as expected when the relevant architecture feature is not
supported.
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
tools/testing/selftests/arm64/fp/sve-ptrace.c | 46 +++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/tools/testing/selftests/arm64/fp/sve-ptrace.c b/tools/testing/selftests/arm64/fp/sve-ptrace.c
index a9b2377c46b8..5f39ca0b4194 100644
--- a/tools/testing/selftests/arm64/fp/sve-ptrace.c
+++ b/tools/testing/selftests/arm64/fp/sve-ptrace.c
@@ -158,6 +158,38 @@ static int set_sve(pid_t pid, const struct vec_type *type,
return ptrace(PTRACE_SETREGSET, pid, type->regset, &iov);
}
+/* A read operation fails */
+static void read_fails(pid_t child, const struct vec_type *type)
+{
+ struct user_sve_header *new_sve = NULL;
+ size_t new_sve_size = 0;
+ void *ret;
+
+ ret = get_sve(child, type, (void **)&new_sve, &new_sve_size);
+
+ ksft_test_result(ret == NULL, "%s unsupported read fails\n",
+ type->name);
+
+ free(new_sve);
+}
+
+/* A write operation fails */
+static void write_fails(pid_t child, const struct vec_type *type)
+{
+ struct user_sve_header sve;
+ int ret;
+
+ /* Just the header, no data */
+ memset(&sve, 0, sizeof(sve));
+ sve.size = sizeof(sve);
+ sve.flags = SVE_PT_REGS_SVE;
+ sve.vl = SVE_VL_MIN;
+ ret = set_sve(child, type, &sve);
+
+ ksft_test_result(ret != 0, "%s unsupported write fails\n",
+ type->name);
+}
+
/* Validate setting and getting the inherit flag */
static void ptrace_set_get_inherit(pid_t child, const struct vec_type *type)
{
@@ -702,6 +734,20 @@ static int do_parent(pid_t child)
}
for (i = 0; i < ARRAY_SIZE(vec_types); i++) {
+ /*
+ * If the vector type isn't supported reads and writes
+ * should fail.
+ */
+ if (!(getauxval(vec_types[i].hwcap_type) & vec_types[i].hwcap)) {
+ read_fails(child, &vec_types[i]);
+ write_fails(child, &vec_types[i]);
+ } else {
+ ksft_test_result_skip("%s unsupported read fails\n",
+ vec_types[i].name);
+ ksft_test_result_skip("%s unsupported write fails\n",
+ vec_types[i].name);
+ }
+
/* FPSIMD via SVE regset */
if (getauxval(vec_types[i].hwcap_type) & vec_types[i].hwcap) {
ptrace_sve_fpsimd(child, &vec_types[i]);
--
2.39.5
