On a system with both SVE and SME when we change one of the VLs this should not result in a change in the other VL. Add a check that this is in fact the case to vec-syscfg.
Signed-off-by: Mark Brown broonie@kernel.org --- tools/testing/selftests/arm64/fp/vec-syscfg.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/arm64/fp/vec-syscfg.c b/tools/testing/selftests/arm64/fp/vec-syscfg.c index 58ea4bde5be7..5f648b97a06f 100644 --- a/tools/testing/selftests/arm64/fp/vec-syscfg.c +++ b/tools/testing/selftests/arm64/fp/vec-syscfg.c @@ -554,7 +554,8 @@ static void prctl_set_onexec(struct vec_data *data) /* For each VQ verify that setting via prctl() does the right thing */ static void prctl_set_all_vqs(struct vec_data *data) { - int ret, vq, vl, new_vl; + int ret, vq, vl, new_vl, i; + int orig_vls[ARRAY_SIZE(vec_data)]; int errors = 0;
if (!data->min_vl || !data->max_vl) { @@ -563,6 +564,9 @@ static void prctl_set_all_vqs(struct vec_data *data) return; }
+ for (i = 0; i < ARRAY_SIZE(vec_data); i++) + orig_vls[i] = vec_data[i].rdvl(); + for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) { vl = sve_vl_from_vq(vq);
@@ -585,6 +589,22 @@ static void prctl_set_all_vqs(struct vec_data *data) errors++; }
+ /* Did any other VLs change? */ + for (i = 0; i < ARRAY_SIZE(vec_data); i++) { + if (&vec_data[i] == data) + continue; + + if (!(getauxval(vec_data[i].hwcap_type) & vec_data[i].hwcap)) + continue; + + if (vec_data[i].rdvl() != orig_vls[i]) { + ksft_print_msg("%s VL changed from %d to %d\n", + vec_data[i].name, orig_vls[i], + vec_data[i].rdvl()); + errors++; + } + } + /* Was that the VL we asked for? */ if (new_vl == vl) continue;