xref: /qemu/include/hw/s390x/cpu-topology.h (revision c809bbc8)

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * CPU Topology
 *
 * Copyright IBM Corp. 2022, 2023
 * Author(s): Pierre Morel <pmorel@linux.ibm.com>
 *
 */
#ifndef HW_S390X_CPU_TOPOLOGY_H
#define HW_S390X_CPU_TOPOLOGY_H

#ifndef CONFIG_USER_ONLY

#include "qemu/queue.h"
#include "hw/boards.h"
#include "qapi/qapi-types-machine-target.h"

typedef struct S390Topology {
    uint8_t *cores_per_socket;
} S390Topology;

#ifdef CONFIG_KVM
bool s390_has_topology(void);
void s390_topology_setup_cpu(MachineState *ms, S390CPU *cpu, Error **errp);
#else
static inline bool s390_has_topology(void)
{
    return false;
}
static inline void s390_topology_setup_cpu(MachineState *ms,
                                           S390CPU *cpu,
                                           Error **errp) {}
#endif

extern S390Topology s390_topology;

static inline int s390_std_socket(int n, CpuTopology *smp)
{
    return (n / smp->cores) % smp->sockets;
}

static inline int s390_std_book(int n, CpuTopology *smp)
{
    return (n / (smp->cores * smp->sockets)) % smp->books;
}

static inline int s390_std_drawer(int n, CpuTopology *smp)
{
    return (n / (smp->cores * smp->sockets * smp->books)) % smp->drawers;
}

#endif /* CONFIG_USER_ONLY */

#endif