1 | // SPDX-License-Identifier: GPL-2.0 |
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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; |
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(address: &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 |