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