1// SPDX-License-Identifier: GPL-2.0
 2#include <asm/io.h>
 3#include <asm/hvcall.h>
 4
 5#include "hv-gpci.h"
 6#include "hv-common.h"
 7
 8unsigned 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(&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}

 
 1#include <asm/io.h>
 2#include <asm/hvcall.h>
 3
 4#include "hv-gpci.h"
 5#include "hv-common.h"
 6
 7unsigned long hv_perf_caps_get(struct hv_perf_caps *caps)
 8{
 9	unsigned long r;
10	struct p {
11		struct hv_get_perf_counter_info_params params;
12		struct hv_gpci_system_performance_capabilities caps;
13	} __packed __aligned(sizeof(uint64_t));
14
15	struct p arg = {
16		.params = {
17			.counter_request = cpu_to_be32(
18				HV_GPCI_system_performance_capabilities),
19			.starting_index = cpu_to_be32(-1),
20			.counter_info_version_in = 0,
21		}
22	};
23
24	r = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO,
25			       virt_to_phys(&arg), sizeof(arg));
26
27	if (r)
28		return r;
29
30	pr_devel("capability_mask: 0x%x\n", arg.caps.capability_mask);
31
32	caps->version = arg.params.counter_info_version_out;
33	caps->collect_privileged = !!arg.caps.perf_collect_privileged;
34	caps->ga = !!(arg.caps.capability_mask & HV_GPCI_CM_GA);
35	caps->expanded = !!(arg.caps.capability_mask & HV_GPCI_CM_EXPANDED);
36	caps->lab = !!(arg.caps.capability_mask & HV_GPCI_CM_LAB);
37
38	return r;
39}