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    Subject[PATCH v4 15/21] kselftest/arm64: Cover ZT in the FP stress test
    Hook up the newly added zt-test program in the FPSIMD stress tests, start
    a copy per CPU when SME2 is supported.

    Signed-off-by: Mark Brown <broonie@kernel.org>
    ---
    tools/testing/selftests/arm64/fp/fp-stress.c | 29 ++++++++++++++++++++++++++--
    1 file changed, 27 insertions(+), 2 deletions(-)

    diff --git a/tools/testing/selftests/arm64/fp/fp-stress.c b/tools/testing/selftests/arm64/fp/fp-stress.c
    index f8b2f41aac36..520385fcfede 100644
    --- a/tools/testing/selftests/arm64/fp/fp-stress.c
    +++ b/tools/testing/selftests/arm64/fp/fp-stress.c
    @@ -370,6 +370,19 @@ static void start_za(struct child_data *child, int vl, int cpu)
    ksft_print_msg("Started %s\n", child->name);
    }

    +static void start_zt(struct child_data *child, int cpu)
    +{
    + int ret;
    +
    + ret = asprintf(&child->name, "ZT-%d", cpu);
    + if (ret == -1)
    + ksft_exit_fail_msg("asprintf() failed\n");
    +
    + child_start(child, "./zt-test");
    +
    + ksft_print_msg("Started %s\n", child->name);
    +}
    +
    static void probe_vls(int vls[], int *vl_count, int set_vl)
    {
    unsigned int vq;
    @@ -426,6 +439,7 @@ int main(int argc, char **argv)
    bool all_children_started = false;
    int seen_children;
    int sve_vls[MAX_VLS], sme_vls[MAX_VLS];
    + bool have_sme2;
    struct sigaction sa;

    while ((c = getopt_long(argc, argv, "t:", options, NULL)) != -1) {
    @@ -458,6 +472,13 @@ int main(int argc, char **argv)
    sme_vl_count = 0;
    }

    + if (getauxval(AT_HWCAP2) & HWCAP2_SME2) {
    + tests += cpus;
    + have_sme2 = true;
    + } else {
    + have_sme2 = false;
    + }
    +
    /* Force context switching if we only have FPSIMD */
    if (!sve_vl_count && !sme_vl_count)
    fpsimd_per_cpu = 2;
    @@ -468,8 +489,9 @@ int main(int argc, char **argv)
    ksft_print_header();
    ksft_set_plan(tests);

    - ksft_print_msg("%d CPUs, %d SVE VLs, %d SME VLs\n",
    - cpus, sve_vl_count, sme_vl_count);
    + ksft_print_msg("%d CPUs, %d SVE VLs, %d SME VLs, SME2 %s\n",
    + cpus, sve_vl_count, sme_vl_count,
    + have_sme2 ? "present" : "absent");

    if (timeout > 0)
    ksft_print_msg("Will run for %ds\n", timeout);
    @@ -527,6 +549,9 @@ int main(int argc, char **argv)
    start_ssve(&children[num_children++], sme_vls[j], i);
    start_za(&children[num_children++], sme_vls[j], i);
    }
    +
    + if (have_sme2)
    + start_zt(&children[num_children++], i);
    }

    /*
    --
    2.34.1

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