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 84