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 "target/s390x/gen-features.h" 18 #include "hw/core/cpu.h" 19 20 /* static CPU definition */ 21 struct S390CPUDef { 22 const char *name; /* name exposed to the user */ 23 const char *desc; /* description exposed to the user */ 24 uint8_t gen; /* hw generation identification */ 25 uint16_t type; /* cpu type identification */ 26 uint8_t ec_ga; /* EC GA version (on which also the BC is based) */ 27 uint8_t mha_pow; /* maximum host address power, mha = 2^pow-1 */ 28 uint32_t hmfai; /* hypervisor-managed facilities */ 29 /* base/min features, must never be changed between QEMU versions */ 30 S390FeatBitmap base_feat; 31 /* used to init base_feat from generated data */ 32 S390FeatInit base_init; 33 /* default features, QEMU version specific */ 34 S390FeatBitmap default_feat; 35 /* used to init default_feat from generated data */ 36 S390FeatInit default_init; 37 /* max allowed features, QEMU version specific */ 38 S390FeatBitmap full_feat; 39 /* used to init full_feat from generated data */ 40 S390FeatInit full_init; 41 }; 42 43 /* CPU model based on a CPU definition */ 44 struct S390CPUModel { 45 const S390CPUDef *def; 46 S390FeatBitmap features; 47 /* values copied from the "host" model, can change during migration */ 48 uint16_t lowest_ibc; /* lowest IBC that the hardware supports */ 49 uint32_t cpu_id; /* CPU id */ 50 uint8_t cpu_id_format; /* CPU id format bit */ 51 uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */ 52 }; 53 54 /* 55 * CPU ID 56 * 57 * bits 0-7: Zeroes (ff for kvm) 58 * bits 8-31: CPU ID (serial number) 59 * bits 32-47: Machine type 60 * bit 48: CPU ID format 61 * bits 49-63: Zeroes 62 */ 63 #define cpuid_type(x) (((x) >> 16) & 0xffff) 64 #define cpuid_id(x) (((x) >> 32) & 0xffffff) 65 #define cpuid_ver(x) (((x) >> 56) & 0xff) 66 #define cpuid_format(x) (((x) >> 15) & 0x1) 67 68 #define lowest_ibc(x) (((uint32_t)(x) >> 16) & 0xfff) 69 #define unblocked_ibc(x) ((uint32_t)(x) & 0xfff) 70 #define has_ibc(x) (lowest_ibc(x) != 0) 71 72 #define S390_GEN_Z10 0xa 73 #define ibc_gen(x) (x == 0 ? 0 : ((x >> 4) + S390_GEN_Z10)) 74 #define ibc_ec_ga(x) (x & 0xf) 75 76 void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat); 77 void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat); 78 void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga, 79 S390FeatGroup group); 80 uint32_t s390_get_hmfai(void); 81 uint8_t s390_get_mha_pow(void); 82 uint32_t s390_get_ibc_val(void); 83 static inline uint16_t s390_ibc_from_cpu_model(const S390CPUModel *model) 84 { 85 uint16_t ibc = 0; 86 87 if (model->def->gen >= S390_GEN_Z10) { 88 ibc = ((model->def->gen - S390_GEN_Z10) << 4) + model->def->ec_ga; 89 } 90 return ibc; 91 } 92 void s390_get_feat_block(S390FeatType type, uint8_t *data); 93 bool s390_has_feat(S390Feat feat); 94 uint8_t s390_get_gen_for_cpu_type(uint16_t type); 95 static inline bool s390_known_cpu_type(uint16_t type) 96 { 97 return s390_get_gen_for_cpu_type(type) != 0; 98 } 99 #define CPU_ID_SHIFT 32 100 #define CPU_ID_BITS 24 101 /* 102 * When cpu_id_format is 0 (basic mode), the leftmost 4 bits of cpu_id contain 103 * the rightmost 4 bits of the physical CPU address. 104 */ 105 #define CPU_PHYS_ADDR_BITS 4 106 #define CPU_PHYS_ADDR_SHIFT (CPU_ID_SHIFT + CPU_ID_BITS - CPU_PHYS_ADDR_BITS) 107 static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model) 108 { 109 return ((uint64_t)model->cpu_ver << 56) | 110 ((uint64_t)model->cpu_id << CPU_ID_SHIFT) | 111 ((uint64_t)model->def->type << 16) | 112 (model->def->gen == 7 ? 0 : (uint64_t)model->cpu_id_format << 15); 113 } 114 S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga, 115 S390FeatBitmap features); 116 117 #ifdef CONFIG_KVM 118 bool kvm_s390_cpu_models_supported(void); 119 void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp); 120 void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp); 121 #else 122 static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model, 123 Error **errp) 124 { 125 } 126 static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model, 127 Error **errp) 128 { 129 } 130 static inline bool kvm_s390_cpu_models_supported(void) 131 { 132 return false; 133 } 134 #endif 135 136 #endif /* TARGET_S390X_CPU_MODELS_H */ 137