On Wed, Aug 10, 2022 at 04:33:26PM -0700, Ricardo Koller wrote: > On Wed, Aug 10, 2022 at 09:02:16PM +0200, Andrew Jones wrote: > > On Thu, Aug 04, 2022 at 05:41:38PM -0700, Ricardo Koller wrote: > > > 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. > > > > > > Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx> > > > 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 4c601b05..12e7d84e 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"); > > > @@ -842,7 +842,7 @@ 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(); > > > > > > @@ -890,6 +890,7 @@ static bool check_cycles_increase(void) > > > bool success = true; > > > > > > /* init before event access, this test only cares about cycle count */ > > > + pmu_reset(); > > > > This and the other pmu_reset() call below break compilation on 32-bit arm, > > because there's no pmu_reset() defined for it. > I completely missed the 32-bit arm case. Thanks! > > > It'd probably be best if > > we actually implemented some sort of reset for arm, considering it's being > > called in common tests. > > Mind if I start by creating a pmu_reset() for 32-bit arm, which can > later be used by a general arm_reset()? No need to worry about a general one. We just need a pmu_reset implemented for 32-bit arm up in its #ifdef __arm__ section. Thanks, drew > > > > > Thanks, > > drew > > > > > set_pmcntenset(1 << PMU_CYCLE_IDX); > > > set_pmccfiltr(0); /* count cycles in EL0, EL1, but not EL2 */ > > > > > > @@ -944,6 +945,7 @@ 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 */ > > > > > > -- > > > 2.37.1.559.g78731f0fdb-goog > > >
