Some registers like the PMOVS reset to an architecturally UNKNOWN value. Most tests expect them to be reset (mostly zeroed) using pmu_reset(). Add a pmu_reset() on all the tests that need one. As a bonus, fix a couple of comments related to the register state before a sub-test. Signed-off-by: Ricardo Koller <ricarkol@xxxxxxxxxx> --- arm/pmu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arm/pmu.c b/arm/pmu.c index 76156f78..7c5bc259 100644 --- a/arm/pmu.c +++ b/arm/pmu.c @@ -826,7 +826,7 @@ static void test_overflow_interrupt(void) write_regn_el0(pmevcntr, 1, PRE_OVERFLOW); isb(); - /* interrupts are disabled */ + /* interrupts are disabled (PMINTENSET_EL1 == 0) */ mem_access_loop(addr, 200, pmu.pmcr_ro | PMU_PMCR_E); report(expect_interrupts(0), "no overflow interrupt after preset"); @@ -841,7 +841,7 @@ static void test_overflow_interrupt(void) isb(); report(expect_interrupts(0), "no overflow interrupt after counting"); - /* enable interrupts */ + /* enable interrupts (PMINTENSET_EL1 <= ALL_SET) */ pmu_reset_stats(); @@ -889,6 +889,7 @@ static bool check_cycles_increase(void) bool success = true; /* init before event access, this test only cares about cycle count */ + pmu_reset(); set_pmcntenset(1 << PMU_CYCLE_IDX); set_pmccfiltr(0); /* count cycles in EL0, EL1, but not EL2 */ @@ -943,6 +944,7 @@ static bool check_cpi(int cpi) uint32_t pmcr = get_pmcr() | PMU_PMCR_LC | PMU_PMCR_C | PMU_PMCR_E; /* init before event access, this test only cares about cycle count */ + pmu_reset(); set_pmcntenset(1 << PMU_CYCLE_IDX); set_pmccfiltr(0); /* count cycles in EL0, EL1, but not EL2 */ -- 2.37.1.455.g008518b4e5-goog _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
