Hi Andre,
On 3/4/20 7:02 PM, Andre Przywara wrote:
> On Thu, 30 Jan 2020 12:25:04 +0100
> Eric Auger <eric.auger@xxxxxxxxxx> wrote:
>
>> This struct aims at storing information potentially used by
>> all tests such as the pmu version, the read-only part of the
>> PMCR, the number of implemented event counters, ...
>>
>> Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
>
> As I stated already in v1:
Hum that's an oversight. Please forgive for the 2 R-b's I have forgotten.
Thanks
Eric
>
> Reviewed-by: Andre Przywara <andre.przywara@xxxxxxx>
>
> Cheers,
> Andre
>
>> ---
>> arm/pmu.c | 30 +++++++++++++++++++++++++-----
>> 1 file changed, 25 insertions(+), 5 deletions(-)
>>
>> diff --git a/arm/pmu.c b/arm/pmu.c
>> index e5e012d..d24857e 100644
>> --- a/arm/pmu.c
>> +++ b/arm/pmu.c
>> @@ -33,7 +33,14 @@
>>
>> #define NR_SAMPLES 10
>>
>> -static unsigned int pmu_version;
>> +struct pmu {
>> + unsigned int version;
>> + unsigned int nb_implemented_counters;
>> + uint32_t pmcr_ro;
>> +};
>> +
>> +static struct pmu pmu;
>> +
>> #if defined(__arm__)
>> #define ID_DFR0_PERFMON_SHIFT 24
>> #define ID_DFR0_PERFMON_MASK 0xf
>> @@ -265,7 +272,7 @@ static bool check_cpi(int cpi)
>> static void pmccntr64_test(void)
>> {
>> #ifdef __arm__
>> - if (pmu_version == 0x3) {
>> + if (pmu.version == 0x3) {
>> if (ERRATA(9e3f7a296940)) {
>> write_sysreg(0xdead, PMCCNTR64);
>> report(read_sysreg(PMCCNTR64) == 0xdead, "pmccntr64");
>> @@ -278,9 +285,22 @@ static void pmccntr64_test(void)
>> /* Return FALSE if no PMU found, otherwise return TRUE */
>> static bool pmu_probe(void)
>> {
>> - pmu_version = get_pmu_version();
>> - report_info("PMU version: %d", pmu_version);
>> - return pmu_version != 0 && pmu_version != 0xf;
>> + uint32_t pmcr;
>> +
>> + pmu.version = get_pmu_version();
>> + report_info("PMU version: %d", pmu.version);
>> +
>> + if (pmu.version == 0 || pmu.version == 0xF)
>> + return false;
>> +
>> + pmcr = get_pmcr();
>> + pmu.pmcr_ro = pmcr & 0xFFFFFF80;
>> + pmu.nb_implemented_counters =
>> + (pmcr >> PMU_PMCR_N_SHIFT) & PMU_PMCR_N_MASK;
>> + report_info("Implements %d event counters",
>> + pmu.nb_implemented_counters);
>> +
>> + return true;
>> }
>>
>> int main(int argc, char *argv[])
>
