1 /* 2 * CPU models for s390x 3 * 4 * Copyright 2016 IBM Corp. 5 * 6 * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com> 7 * 8 * This work is licensed under the terms of the GNU GPL, version 2 or (at 9 * your option) any later version. See the COPYING file in the top-level 10 * directory. 11 */ 12 13 #ifndef TARGET_S390X_CPU_MODELS_H 14 #define TARGET_S390X_CPU_MODELS_H 15 16 #include "cpu_features.h" 17 #include "qom/cpu.h" 18 19 /* static CPU definition */ 20 struct S390CPUDef { 21 const char *name; /* name exposed to the user */ 22 const char *desc; /* description exposed to the user */ 23 uint8_t gen; /* hw generation identification */ 24 uint16_t type; /* cpu type identification */ 25 uint8_t ec_ga; /* EC GA version (on which also the BC is based) */ 26 uint8_t mha_pow; /* Maximum Host Adress Power, mha = 2^pow-1 */ 27 uint32_t hmfai; /* hypervisor-managed facilities */ 28 /* base/min features, must never be changed between QEMU versions */ 29 S390FeatBitmap base_feat; 30 /* used to init base_feat from generated data */ 31 S390FeatInit base_init; 32 /* deafault features, QEMU version specific */ 33 S390FeatBitmap default_feat; 34 /* used to init default_feat from generated data */ 35 S390FeatInit default_init; 36 /* max allowed features, QEMU version specific */ 37 S390FeatBitmap full_feat; 38 /* used to init full_feat from generated data */ 39 S390FeatInit full_init; 40 }; 41 42 /* CPU model based on a CPU definition */ 43 struct S390CPUModel { 44 const S390CPUDef *def; 45 S390FeatBitmap features; 46 /* values copied from the "host" model, can change during migration */ 47 uint16_t lowest_ibc; /* lowest IBC that the hardware supports */ 48 uint32_t cpu_id; /* CPU id */ 49 uint8_t cpu_id_format; /* CPU id format bit */ 50 uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */ 51 }; 52 53 /* 54 * CPU ID 55 * 56 * bits 0-7: Zeroes (ff for kvm) 57 * bits 8-31: CPU ID (serial number) 58 * bits 32-47: Machine type 59 * bit 48: CPU ID format 60 * bits 49-63: Zeroes 61 */ 62 #define cpuid_type(x) (((x) >> 16) & 0xffff) 63 #define cpuid_id(x) (((x) >> 32) & 0xffffff) 64 #define cpuid_ver(x) (((x) >> 56) & 0xff) 65 #define cpuid_format(x) (((x) >> 15) & 0x1) 66 67 #define lowest_ibc(x) (((uint32_t)(x) >> 16) & 0xfff) 68 #define unblocked_ibc(x) ((uint32_t)(x) & 0xfff) 69 #define has_ibc(x) (lowest_ibc(x) != 0) 70 71 #define S390_GEN_Z10 0xa 72 #define ibc_gen(x) (x == 0 ? 0 : ((x >> 4) + S390_GEN_Z10)) 73 #define ibc_ec_ga(x) (x & 0xf) 74 75 void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat); 76 void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat); 77 uint32_t s390_get_hmfai(void); 78 uint8_t s390_get_mha_pow(void); 79 uint32_t s390_get_ibc_val(void); 80 static inline uint16_t s390_ibc_from_cpu_model(const S390CPUModel *model) 81 { 82 uint16_t ibc = 0; 83 84 if (model->def->gen >= S390_GEN_Z10) { 85 ibc = ((model->def->gen - S390_GEN_Z10) << 4) + model->def->ec_ga; 86 } 87 return ibc; 88 } 89 void s390_get_feat_block(S390FeatType type, uint8_t *data); 90 bool s390_has_feat(S390Feat feat); 91 uint8_t s390_get_gen_for_cpu_type(uint16_t type); 92 static inline bool s390_known_cpu_type(uint16_t type) 93 { 94 return s390_get_gen_for_cpu_type(type) != 0; 95 } 96 static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model) 97 { 98 return ((uint64_t)model->cpu_ver << 56) | 99 ((uint64_t)model->cpu_id << 32) | 100 ((uint64_t)model->def->type << 16) | 101 (model->def->gen == 7 ? 0 : (uint64_t)model->cpu_id_format << 15); 102 } 103 S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga, 104 S390FeatBitmap features); 105 106 #ifdef CONFIG_KVM 107 bool kvm_s390_cpu_models_supported(void); 108 void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp); 109 void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp); 110 #else 111 static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model, 112 Error **errp) 113 { 114 } 115 static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model, 116 Error **errp) 117 { 118 } 119 static inline bool kvm_s390_cpu_models_supported(void) 120 { 121 return false; 122 } 123 #endif 124 125 #endif /* TARGET_S390X_CPU_MODELS_H */ 126