[kvm-unit-tests,2/3] arm: pmu: Reset the pmu registers before starting some tests

Commit Message

Ricardo Koller July 18, 2022, 3:49 p.m. UTC

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.

Signed-off-by: Ricardo Koller <[e-mail]>
---
 arm/pmu.c | 2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/arm/pmu.c b/arm/pmu.c
index fd838392..a7899c3c 100644
--- a/arm/pmu.c
+++ b/arm/pmu.c
@@ -884,6 +884,7 @@  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 */
 
@@ -938,6 +939,7 @@  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 */