1 #include <asm/io.h> 2 #include <asm/hvcall.h> 3 4 #include "hv-gpci.h" 5 #include "hv-common.h" 6 7 unsigned long hv_perf_caps_get(struct hv_perf_caps *caps) 8 { 9 unsigned long r; 10 struct p { 11 struct hv_get_perf_counter_info_params params; 12 struct hv_gpci_system_performance_capabilities caps; 13 } __packed __aligned(sizeof(uint64_t)); 14 15 struct p arg = { 16 .params = { 17 .counter_request = cpu_to_be32( 18 HV_GPCI_system_performance_capabilities), 19 .starting_index = cpu_to_be32(-1), 20 .counter_info_version_in = 0, 21 } 22 }; 23 24 r = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, 25 virt_to_phys(&arg), sizeof(arg)); 26 27 if (r) 28 return r; 29 30 pr_devel("capability_mask: 0x%x\n", arg.caps.capability_mask); 31 32 caps->version = arg.params.counter_info_version_out; 33 caps->collect_privileged = !!arg.caps.perf_collect_privileged; 34 caps->ga = !!(arg.caps.capability_mask & HV_GPCI_CM_GA); 35 caps->expanded = !!(arg.caps.capability_mask & HV_GPCI_CM_EXPANDED); 36 caps->lab = !!(arg.caps.capability_mask & HV_GPCI_CM_LAB); 37 38 return r; 39 } 40