// 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;
}