include/hw/s390x/cpu-topology.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * CPU Topology
   4  *
   5  * Copyright IBM Corp. 2022, 2023
   6  * Author(s): Pierre Morel <pmorel@linux.ibm.com>
   7  *
   8  */
   9 #ifndef HW_S390X_CPU_TOPOLOGY_H
  10 #define HW_S390X_CPU_TOPOLOGY_H
  11
  12 #ifndef CONFIG_USER_ONLY
  13
  14 #include "qemu/queue.h"
  15 #include "hw/boards.h"
  16 #include "qapi/qapi-types-machine-target.h"
  17
  18 #define S390_TOPOLOGY_CPU_IFL   0x03
  19
  20 typedef struct S390TopologyId {
  21     uint8_t sentinel;
  22     uint8_t drawer;
  23     uint8_t book;
  24     uint8_t socket;
  25     uint8_t type;
  26     uint8_t vertical:1;
  27     uint8_t entitlement:2;
  28     uint8_t dedicated;
  29     uint8_t origin;
  30 } S390TopologyId;
  31
  32 typedef struct S390TopologyEntry {
  33     QTAILQ_ENTRY(S390TopologyEntry) next;
  34     S390TopologyId id;
  35     uint64_t mask;
  36 } S390TopologyEntry;
  37
  38 typedef struct S390Topology {
  39     uint8_t *cores_per_socket;
  40     S390CpuPolarization polarization;
  41 } S390Topology;
  42
  43 typedef QTAILQ_HEAD(, S390TopologyEntry) S390TopologyList;
  44
  45 #ifdef CONFIG_KVM
  46 bool s390_has_topology(void);
  47 void s390_topology_setup_cpu(MachineState *ms, S390CPU *cpu, Error **errp);
  48 void s390_topology_reset(void);
  49 #else
  50 static inline bool s390_has_topology(void)
  51 {
  52     return false;
  53 }
  54 static inline void s390_topology_setup_cpu(MachineState *ms,
  55                                            S390CPU *cpu,
  56                                            Error **errp) {}
  57 static inline void s390_topology_reset(void)
  58 {
  59     /* Unreachable, CPU topology not implemented for TCG */
  60     g_assert_not_reached();
  61 }
  62 #endif
  63
  64 extern S390Topology s390_topology;
  65
  66 static inline int s390_std_socket(int n, CpuTopology *smp)
  67 {
  68     return (n / smp->cores) % smp->sockets;
  69 }
  70
  71 static inline int s390_std_book(int n, CpuTopology *smp)
  72 {
  73     return (n / (smp->cores * smp->sockets)) % smp->books;
  74 }
  75
  76 static inline int s390_std_drawer(int n, CpuTopology *smp)
  77 {
  78     return (n / (smp->cores * smp->sockets * smp->books)) % smp->drawers;
  79 }
  80
  81 #endif /* CONFIG_USER_ONLY */
  82
  83 #endif