| // 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; |
| } |