target/s390x/cpu_models.h

   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 typedef 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 } S390CPUDef;
  41
  42 /* CPU model based on a CPU definition */
  43 typedef 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 } S390CPUModel;
  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 */