Hi Ricardo, On 1/26/23 17:53, Ricardo Koller wrote: > PMUv3p5 adds a knob, PMCR_EL0.LP == 1, that allows overflowing at 64-bits > instead of 32. Prepare by doing these 3 things: > > 1. Add a "bool overflow_at_64bits" argument to all tests checking > overflows. Actually test_chained_sw_incr() and test_chained_counters() also test overflows but they feature CHAIN events. I guess that's why you don't need the LP flag. Just tweek the commit msg if you need to respin. > 2. Extend satisfy_prerequisites() to check if the machine supports > "overflow_at_64bits". > 3. Refactor the test invocations to use the new "run_test()" which adds a > report prefix indicating whether the test uses 64 or 32-bit overflows. > > A subsequent commit will actually add the 64-bit overflow tests. > > Signed-off-by: Ricardo Koller <ricarkol@xxxxxxxxxx> > Reviewed-by: Reiji Watanabe <reijiw@xxxxxxxxxx> Besides Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx> Thanks Eric > --- > arm/pmu.c | 99 +++++++++++++++++++++++++++++++++---------------------- > 1 file changed, 60 insertions(+), 39 deletions(-) > > diff --git a/arm/pmu.c b/arm/pmu.c > index 7f0794d..06cbd73 100644 > --- a/arm/pmu.c > +++ b/arm/pmu.c > @@ -164,13 +164,13 @@ static void pmu_reset(void) > /* event counter tests only implemented for aarch64 */ > static void test_event_introspection(void) {} > static void test_event_counter_config(void) {} > -static void test_basic_event_count(void) {} > -static void test_mem_access(void) {} > -static void test_sw_incr(void) {} > -static void test_chained_counters(void) {} > -static void test_chained_sw_incr(void) {} > -static void test_chain_promotion(void) {} > -static void test_overflow_interrupt(void) {} > +static void test_basic_event_count(bool overflow_at_64bits) {} > +static void test_mem_access(bool overflow_at_64bits) {} > +static void test_sw_incr(bool overflow_at_64bits) {} > +static void test_chained_counters(bool unused) {} > +static void test_chained_sw_incr(bool unused) {} > +static void test_chain_promotion(bool unused) {} > +static void test_overflow_interrupt(bool overflow_at_64bits) {} > > #elif defined(__aarch64__) > #define ID_AA64DFR0_PERFMON_SHIFT 8 > @@ -435,13 +435,24 @@ static uint64_t pmevcntr_mask(void) > return (uint32_t)~0; > } > > -static void test_basic_event_count(void) > +static bool check_overflow_prerequisites(bool overflow_at_64bits) > +{ > + if (overflow_at_64bits && pmu.version < ID_DFR0_PMU_V3_8_5) { > + report_skip("Skip test as 64 overflows need FEAT_PMUv3p5"); > + return false; > + } > + > + return true; > +} > + > +static void test_basic_event_count(bool overflow_at_64bits) > { > uint32_t implemented_counter_mask, non_implemented_counter_mask; > uint32_t counter_mask; > uint32_t events[] = {CPU_CYCLES, INST_RETIRED}; > > - if (!satisfy_prerequisites(events, ARRAY_SIZE(events))) > + if (!satisfy_prerequisites(events, ARRAY_SIZE(events)) || > + !check_overflow_prerequisites(overflow_at_64bits)) > return; > > implemented_counter_mask = BIT(pmu.nb_implemented_counters) - 1; > @@ -515,12 +526,13 @@ static void test_basic_event_count(void) > "check overflow happened on #0 only"); > } > > -static void test_mem_access(void) > +static void test_mem_access(bool overflow_at_64bits) > { > void *addr = malloc(PAGE_SIZE); > uint32_t events[] = {MEM_ACCESS, MEM_ACCESS}; > > - if (!satisfy_prerequisites(events, ARRAY_SIZE(events))) > + if (!satisfy_prerequisites(events, ARRAY_SIZE(events)) || > + !check_overflow_prerequisites(overflow_at_64bits)) > return; > > pmu_reset(); > @@ -551,13 +563,14 @@ static void test_mem_access(void) > read_sysreg(pmovsclr_el0)); > } > > -static void test_sw_incr(void) > +static void test_sw_incr(bool overflow_at_64bits) > { > uint32_t events[] = {SW_INCR, SW_INCR}; > uint64_t cntr0 = (PRE_OVERFLOW + 100) & pmevcntr_mask(); > int i; > > - if (!satisfy_prerequisites(events, ARRAY_SIZE(events))) > + if (!satisfy_prerequisites(events, ARRAY_SIZE(events)) || > + !check_overflow_prerequisites(overflow_at_64bits)) > return; > > pmu_reset(); > @@ -597,7 +610,7 @@ static void test_sw_incr(void) > "overflow on counter #0 after 100 SW_INCR"); > } > > -static void test_chained_counters(void) > +static void test_chained_counters(bool unused) > { > uint32_t events[] = {CPU_CYCLES, CHAIN}; > > @@ -638,7 +651,7 @@ static void test_chained_counters(void) > report(read_sysreg(pmovsclr_el0) == 0x3, "overflow on even and odd counters"); > } > > -static void test_chained_sw_incr(void) > +static void test_chained_sw_incr(bool unused) > { > uint32_t events[] = {SW_INCR, CHAIN}; > uint64_t cntr0 = (PRE_OVERFLOW + 100) & pmevcntr_mask(); > @@ -691,7 +704,7 @@ static void test_chained_sw_incr(void) > read_regn_el0(pmevcntr, 0), read_regn_el0(pmevcntr, 1)); > } > > -static void test_chain_promotion(void) > +static void test_chain_promotion(bool unused) > { > uint32_t events[] = {MEM_ACCESS, CHAIN}; > void *addr = malloc(PAGE_SIZE); > @@ -840,13 +853,14 @@ static bool expect_interrupts(uint32_t bitmap) > return true; > } > > -static void test_overflow_interrupt(void) > +static void test_overflow_interrupt(bool overflow_at_64bits) > { > uint32_t events[] = {MEM_ACCESS, SW_INCR}; > void *addr = malloc(PAGE_SIZE); > int i; > > - if (!satisfy_prerequisites(events, ARRAY_SIZE(events))) > + if (!satisfy_prerequisites(events, ARRAY_SIZE(events)) || > + !check_overflow_prerequisites(overflow_at_64bits)) > return; > > gic_enable_defaults(); > @@ -1070,6 +1084,27 @@ static bool pmu_probe(void) > return true; > } > > +static void run_test(const char *name, const char *prefix, > + void (*test)(bool), void *arg) > +{ > + report_prefix_push(name); > + report_prefix_push(prefix); > + > + test(arg); > + > + report_prefix_pop(); > + report_prefix_pop(); > +} > + > +static void run_event_test(char *name, void (*test)(bool), > + bool overflow_at_64bits) > +{ > + const char *prefix = overflow_at_64bits ? "64-bit overflows" > + : "32-bit overflows"; > + > + run_test(name, prefix, test, (void *)overflow_at_64bits); > +} > + > int main(int argc, char *argv[]) > { > int cpi = 0; > @@ -1102,33 +1137,19 @@ int main(int argc, char *argv[]) > test_event_counter_config(); > report_prefix_pop(); > } else if (strcmp(argv[1], "pmu-basic-event-count") == 0) { > - report_prefix_push(argv[1]); > - test_basic_event_count(); > - report_prefix_pop(); > + run_event_test(argv[1], test_basic_event_count, false); > } else if (strcmp(argv[1], "pmu-mem-access") == 0) { > - report_prefix_push(argv[1]); > - test_mem_access(); > - report_prefix_pop(); > + run_event_test(argv[1], test_mem_access, false); > } else if (strcmp(argv[1], "pmu-sw-incr") == 0) { > - report_prefix_push(argv[1]); > - test_sw_incr(); > - report_prefix_pop(); > + run_event_test(argv[1], test_sw_incr, false); > } else if (strcmp(argv[1], "pmu-chained-counters") == 0) { > - report_prefix_push(argv[1]); > - test_chained_counters(); > - report_prefix_pop(); > + run_event_test(argv[1], test_chained_counters, false); > } else if (strcmp(argv[1], "pmu-chained-sw-incr") == 0) { > - report_prefix_push(argv[1]); > - test_chained_sw_incr(); > - report_prefix_pop(); > + run_event_test(argv[1], test_chained_sw_incr, false); > } else if (strcmp(argv[1], "pmu-chain-promotion") == 0) { > - report_prefix_push(argv[1]); > - test_chain_promotion(); > - report_prefix_pop(); > + run_event_test(argv[1], test_chain_promotion, false); > } else if (strcmp(argv[1], "pmu-overflow-interrupt") == 0) { > - report_prefix_push(argv[1]); > - test_overflow_interrupt(); > - report_prefix_pop(); > + run_event_test(argv[1], test_overflow_interrupt, false); > } else { > report_abort("Unknown sub-test '%s'", argv[1]); > }