1 // SPDX-License-Identifier: GPL-2.0 2 #include <asm/io.h> 3 #include <asm/hvcall.h> 4 5 #include "hv-gpci.h" 6 #include "hv-common.h" 7 hv_perf_caps_get(struct hv_perf_caps * caps)8unsigned long hv_perf_caps_get(struct hv_perf_caps *caps) 9 { 10 unsigned long r; 11 struct p { 12 struct hv_get_perf_counter_info_params params; 13 struct hv_gpci_system_performance_capabilities caps; 14 } __packed __aligned(sizeof(uint64_t)); 15 16 struct p arg = { 17 .params = { 18 .counter_request = cpu_to_be32( 19 HV_GPCI_system_performance_capabilities), 20 .starting_index = cpu_to_be32(-1), 21 .counter_info_version_in = 0, 22 } 23 }; 24 25 r = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, 26 virt_to_phys(&arg), sizeof(arg)); 27 28 if (r) 29 return r; 30 31 pr_devel("capability_mask: 0x%x\n", arg.caps.capability_mask); 32 33 caps->version = arg.params.counter_info_version_out; 34 caps->collect_privileged = !!arg.caps.perf_collect_privileged; 35 caps->ga = !!(arg.caps.capability_mask & HV_GPCI_CM_GA); 36 caps->expanded = !!(arg.caps.capability_mask & HV_GPCI_CM_EXPANDED); 37 caps->lab = !!(arg.caps.capability_mask & HV_GPCI_CM_LAB); 38 39 return r; 40 } 41