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_ver;        /* CPU version, usually "ff" for kvm */
  50 } S390CPUModel;
  51
  52 /*
  53  * CPU ID
  54  *
  55  * bits 0-7: Zeroes (ff for kvm)
  56  * bits 8-31: CPU ID (serial number)
  57  * bits 32-48: Machine type
  58  * bits 48-63: Zeroes
  59  */
  60 #define cpuid_type(x)     (((x) >> 16) & 0xffff)
  61 #define cpuid_id(x)       (((x) >> 32) & 0xffffff)
  62 #define cpuid_ver(x)      (((x) >> 56) & 0xff)
  63
  64 #define lowest_ibc(x)     (((uint32_t)(x) >> 16) & 0xfff)
  65 #define unblocked_ibc(x)  ((uint32_t)(x) & 0xfff)
  66 #define has_ibc(x)        (lowest_ibc(x) != 0)
  67
  68 #define S390_GEN_Z10 0xa
  69 #define ibc_gen(x)        (x == 0 ? 0 : ((x >> 4) + S390_GEN_Z10))
  70 #define ibc_ec_ga(x)      (x & 0xf)
  71
  72 uint32_t s390_get_hmfai(void);
  73 uint8_t s390_get_mha_pow(void);
  74 uint32_t s390_get_ibc_val(void);
  75 static inline uint16_t s390_ibc_from_cpu_model(const S390CPUModel *model)
  76 {
  77     uint16_t ibc = 0;
  78
  79     if (model->def->gen >= S390_GEN_Z10) {
  80         ibc = ((model->def->gen - S390_GEN_Z10) << 4) + model->def->ec_ga;
  81     }
  82     return ibc;
  83 }
  84 void s390_get_feat_block(S390FeatType type, uint8_t *data);
  85 bool s390_has_feat(S390Feat feat);
  86 uint8_t s390_get_gen_for_cpu_type(uint16_t type);
  87 static inline bool s390_known_cpu_type(uint16_t type)
  88 {
  89     return s390_get_gen_for_cpu_type(type) != 0;
  90 }
  91 static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model)
  92 {
  93     return ((uint64_t)model->cpu_ver << 56) |
  94            ((uint64_t)model->cpu_id << 32) |
  95            ((uint64_t)model->def->type << 16);
  96 }
  97 S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
  98                                     S390FeatBitmap features);
  99
 100 #ifdef CONFIG_KVM
 101 bool kvm_s390_cpu_models_supported(void);
 102 void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
 103 void kvm_s390_apply_cpu_model(const S390CPUModel *model,  Error **errp);
 104 #else
 105 static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model,
 106                                                Error **errp)
 107 {
 108 }
 109 static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model,
 110                                             Error **errp)
 111 {
 112 }
 113 static inline bool kvm_s390_cpu_models_supported(void)
 114 {
 115     return false;
 116 }
 117 #endif
 118
 119 #endif /* TARGET_S390X_CPU_MODELS_H */