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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2d1b21ad CS |
2 | #include <asm/io.h> |
3 | #include <asm/hvcall.h> | |
4 | ||
5 | #include "hv-gpci.h" | |
6 | #include "hv-common.h" | |
7 | ||
8 | unsigned 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; | |
9e9f6010 | 13 | struct hv_gpci_system_performance_capabilities caps; |
2d1b21ad CS |
14 | } __packed __aligned(sizeof(uint64_t)); |
15 | ||
16 | struct p arg = { | |
17 | .params = { | |
18 | .counter_request = cpu_to_be32( | |
9e9f6010 | 19 | HV_GPCI_system_performance_capabilities), |
2d1b21ad CS |
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; | |
9e9f6010 CS |
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); | |
2d1b21ad CS |
38 | |
39 | return r; | |
40 | } |