diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/arch_topology.h | 11 | ||||
| -rw-r--r-- | include/linux/perf/arm_pmu.h | 1 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h index d72d6e5aa200..daa1af2e8204 100644 --- a/include/linux/arch_topology.h +++ b/include/linux/arch_topology.h @@ -89,6 +89,17 @@ void remove_cpu_topology(unsigned int cpuid); void reset_cpu_topology(void); int parse_acpi_topology(void); void freq_inv_set_max_ratio(int cpu, u64 max_rate); + +/* + * Architectures like ARM64 don't have reliable architectural way to get SMT + * information and depend on the firmware (ACPI/OF) report. Non-SMT core won't + * initialize thread_id so we can use this to detect the SMT implementation. + */ +static inline bool topology_core_has_smt(int cpu) +{ + return cpu_topology[cpu].thread_id != -1; +} + #endif #endif /* _LINUX_ARCH_TOPOLOGY_H_ */ diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h index 93c9a26492fc..2d39322c40c4 100644 --- a/include/linux/perf/arm_pmu.h +++ b/include/linux/perf/arm_pmu.h @@ -119,6 +119,7 @@ struct arm_pmu { /* PMUv3 only */ int pmuver; + bool has_smt; u64 reg_pmmir; u64 reg_brbidr; #define ARMV8_PMUV3_MAX_COMMON_EVENTS 0x40 |