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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 void s390_set_qemu_cpu_model(uint16_t type, uint8_t gen, uint8_t ec_ga,
117 const S390FeatInit feat_init);
118 void s390_cpu_list(void);
119
120 bool kvm_s390_cpu_models_supported(void);
121 bool kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
122 bool kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp);
123
124 #endif /* TARGET_S390X_CPU_MODELS_H */