diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/arm/helper.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 8c1ff16..7c531ee 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -1187,13 +1187,21 @@ static bool pmu_counter_enabled(CPUARMState *env, uint8_t counter) bool enabled, prohibited = false, filtered; bool secure = arm_is_secure(env); int el = arm_current_el(env); - uint64_t mdcr_el2 = arm_mdcr_el2_eff(env); - uint8_t hpmn = mdcr_el2 & MDCR_HPMN; + uint64_t mdcr_el2; + uint8_t hpmn; + /* + * We might be called for M-profile cores where MDCR_EL2 doesn't + * exist and arm_mdcr_el2_eff() will assert, so this early-exit check + * must be before we read that value. + */ if (!arm_feature(env, ARM_FEATURE_PMU)) { return false; } + mdcr_el2 = arm_mdcr_el2_eff(env); + hpmn = mdcr_el2 & MDCR_HPMN; + if (!arm_feature(env, ARM_FEATURE_EL2) || (counter < hpmn || counter == 31)) { e = env->cp15.c9_pmcr & PMCRE; |