41 lines
1 KiB
C
41 lines
1 KiB
C
|
// 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;
|
||
|
|
}
|