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 "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 Adress 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 | /* deafault 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 | static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model) |
100 | { |
101 | return ((uint64_t)model->cpu_ver << 56) | |
102 | ((uint64_t)model->cpu_id << 32) | |
103 | ((uint64_t)model->def->type << 16) | |
104 | (model->def->gen == 7 ? 0 : (uint64_t)model->cpu_id_format << 15); |
105 | } |
106 | S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga, |
107 | S390FeatBitmap features); |
108 | |
109 | #ifdef CONFIG_KVM |
110 | bool kvm_s390_cpu_models_supported(void); |
111 | void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp); |
112 | void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp); |
113 | #else |
114 | static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model, |
115 | Error **errp) |
116 | { |
117 | } |
118 | static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model, |
119 | Error **errp) |
120 | { |
121 | } |
122 | static inline bool kvm_s390_cpu_models_supported(void) |
123 | { |
124 | return false; |
125 | } |
126 | #endif |
127 | |
128 | #endif /* TARGET_S390X_CPU_MODELS_H */ |
129 | |