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 "target/s390x/gen-features.h"
  18 #include "hw/core/cpu.h"
  19
  20 /* static CPU definition */
  21 typedef 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 } S390CPUDef;
  42
  43 /* CPU model based on a CPU definition */
  44 typedef 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 } S390CPUModel;
  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 */