PMUv3p5 uses 64-bit counters irrespective of whether the PMU is configured
for overflowing at 32 or 64-bits. The consequence is that tests that check
the counter values after overflowing should not assume that values will be
wrapped around 32-bits: they overflow into the other half of the 64-bit
counters on PMUv3p5.
Fix tests by correctly checking overflowing-counters against the expected
64-bit value.
Signed-off-by: Ricardo Koller <ricar...@google.com>
---
arm/pmu.c | 37 +++++++++++++++++++++++++------------
1 file changed, 25 insertions(+), 12 deletions(-)
diff --git a/arm/pmu.c b/arm/pmu.c
index cd47b14..1b55e20 100644
--- a/arm/pmu.c
+++ b/arm/pmu.c
@@ -54,10 +54,13 @@
#define EXT_COMMON_EVENTS_LOW 0x4000
#define EXT_COMMON_EVENTS_HIGH 0x403F
-#define ALL_SET 0xFFFFFFFF
-#define ALL_CLEAR 0x0
-#define PRE_OVERFLOW 0xFFFFFFF0
-#define PRE_OVERFLOW2 0xFFFFFFDC
+#define ALL_SET 0x00000000FFFFFFFFULL
+#define ALL_SET_64 0xFFFFFFFFFFFFFFFFULL
+#define ALL_CLEAR 0x0000000000000000ULL
+#define PRE_OVERFLOW 0x00000000FFFFFFF0ULL
+#define PRE_OVERFLOW2 0x00000000FFFFFFDCULL
+
+#define ALL_SET_AT(_64b) (_64b ? ALL_SET_64 : ALL_SET)
#define PMU_PPI 23
@@ -538,6 +541,7 @@ static void test_mem_access(void)
static void test_sw_incr(void)
{
uint32_t events[] = {SW_INCR, SW_INCR};
+ uint64_t cntr0;
int i;
if (!satisfy_prerequisites(events, ARRAY_SIZE(events)))
@@ -572,9 +576,11 @@ static void test_sw_incr(void)
write_sysreg(0x3, pmswinc_el0);
isb();
- report(read_regn_el0(pmevcntr, 0) == 84, "counter #1 after + 100
SW_INCR");
- report(read_regn_el0(pmevcntr, 1) == 100,
- "counter #0 after + 100 SW_INCR");
+ cntr0 = (pmu.version < ID_DFR0_PMU_V3_8_5) ?
+ (uint32_t)PRE_OVERFLOW + 100 :
+ (uint64_t)PRE_OVERFLOW + 100;
+ report(read_regn_el0(pmevcntr, 0) == cntr0, "counter #0 after + 100
SW_INCR");
+ report(read_regn_el0(pmevcntr, 1) == 100, "counter #1 after + 100
SW_INCR");
report_info("counter values after 100 SW_INCR #0=%ld #1=%ld",
read_regn_el0(pmevcntr, 0), read_regn_el0(pmevcntr, 1));
report(read_sysreg(pmovsclr_el0) == 0x1,
@@ -584,6 +590,7 @@ static void test_sw_incr(void)
static void test_chained_counters(void)
{
uint32_t events[] = {CPU_CYCLES, CHAIN};
+ uint64_t all_set = ALL_SET_AT(pmu.version >= ID_DFR0_PMU_V3_8_5);
if (!satisfy_prerequisites(events, ARRAY_SIZE(events)))
return;
@@ -614,17 +621,19 @@ static void test_chained_counters(void)
report(read_sysreg(pmovsclr_el0) == 0x1, "overflow recorded for chained
incr #2");
write_regn_el0(pmevcntr, 0, PRE_OVERFLOW);
- write_regn_el0(pmevcntr, 1, ALL_SET);
+ write_regn_el0(pmevcntr, 1, all_set);
precise_instrs_loop(22, pmu.pmcr_ro | PMU_PMCR_E);
report_info("overflow reg = 0x%lx", read_sysreg(pmovsclr_el0));
- report(!read_regn_el0(pmevcntr, 1), "CHAIN counter #1 wrapped");
+ report(read_regn_el0(pmevcntr, 1) == 0, "CHAIN counter #1 wrapped");
+
report(read_sysreg(pmovsclr_el0) == 0x3, "overflow on even and odd
counters");
}
static void test_chained_sw_incr(void)
{
uint32_t events[] = {SW_INCR, CHAIN};
+ uint64_t cntr0, cntr1;
int i;
if (!satisfy_prerequisites(events, ARRAY_SIZE(events)))
@@ -665,10 +674,14 @@ static void test_chained_sw_incr(void)
write_sysreg(0x1, pmswinc_el0);
isb();
+ cntr0 = (pmu.version < ID_DFR0_PMU_V3_8_5) ?
+ (uint32_t)PRE_OVERFLOW + 100 :
+ (uint64_t)PRE_OVERFLOW + 100;
+ cntr1 = (pmu.version < ID_DFR0_PMU_V3_8_5) ? 0 : ALL_SET + 1;
report((read_sysreg(pmovsclr_el0) == 0x3) &&
- (read_regn_el0(pmevcntr, 1) == 0) &&
- (read_regn_el0(pmevcntr, 0) == 84),
- "expected overflows and values after 100 SW_INCR/CHAIN");
+ (read_regn_el0(pmevcntr, 0) == cntr0) &&
+ (read_regn_el0(pmevcntr, 1) == cntr1),
+ "expected overflows and values after 100 SW_INCR/CHAIN");
report_info("overflow=0x%lx, #0=%ld #1=%ld", read_sysreg(pmovsclr_el0),
read_regn_el0(pmevcntr, 0), read_regn_el0(pmevcntr, 1));
}
--
2.39.0.314.g84b9a713c41-goog
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