Re: [kvm-unit-tests PATCH v2 5/9] arm: pmu: Basic event counter Tests

[Peter Maydell]

On Thu, 30 Jan 2020 at 11:26, Eric Auger <address@hidden> wrote:
>
> Adds the following tests:
> - event-counter-config: test event counter configuration
> - basic-event-count:
>   - programs counters #0 and #1 to count 2 required events
>   (resp. CPU_CYCLES and INST_RETIRED). Counter #0 is preset
>   to a value close enough to the 32b
>   overflow limit so that we check the overflow bit is set
>   after the execution of the asm loop.
> - mem-access: counts MEM_ACCESS event on counters #0 and #1
>   with and without 32-bit overflow.
>
> Signed-off-by: Eric Auger <address@hidden>

> +static bool satisfy_prerequisites(uint32_t *events, unsigned int nb_events)
> +{
> +       int i;
> +
> +       if (pmu.nb_implemented_counters < nb_events) {
> +               report_skip("Skip test as number of counters is too small 
> (%d)",
> +                           pmu.nb_implemented_counters);
> +               return false;
> +       }
> +
> +       for (i = 0; i < nb_events; i++) {
> +               if (!is_event_supported(events[i], false)) {
> +                       report_skip("Skip test as event %d is not supported",
> +                                   events[i]);

Event numbers are given in hex in the Arm ARM and also
specified in hex in your test source code. I think it
would be more helpful if the message here used "0x%x", to
save the reader having to do the decimal-to-hex conversion
to find the event in the spec or the test case.

thanks
-- PMM