// SPDX-License-Identifier: GPL-2.0 #include <asm/io.h> #include <asm/hvcall.h> #include "hv-gpci.h" #include "hv-common.h" unsigned long hv_perf_caps_get(struct hv_perf_caps *caps) { unsigned long r; struct p { struct hv_get_perf_counter_info_params params; struct hv_gpci_system_performance_capabilities caps; } __packed __aligned(sizeof(uint64_t)); struct p arg = { .params = { .counter_request = cpu_to_be32( HV_GPCI_system_performance_capabilities), .starting_index = cpu_to_be32(-1), .counter_info_version_in = 0, } }; r = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, virt_to_phys(&arg), sizeof(arg)); if (r) return r; pr_devel("capability_mask: 0x%x\n", arg.caps.capability_mask); caps->version = arg.params.counter_info_version_out; caps->collect_privileged = !!arg.caps.perf_collect_privileged; caps->ga = !!(arg.caps.capability_mask & HV_GPCI_CM_GA); caps->expanded = !!(arg.caps.capability_mask & HV_GPCI_CM_EXPANDED); caps->lab = !!(arg.caps.capability_mask & HV_GPCI_CM_LAB); return r; }