xref: /openbmc/qemu/target/s390x/cpu_models.h (revision 9f2130f58d5dd4e1fcb435cca08bf77e7c32e6c6)
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 uint32_t s390_get_hmfai(void);
76 uint8_t s390_get_mha_pow(void);
77 uint32_t s390_get_ibc_val(void);
78 static inline uint16_t s390_ibc_from_cpu_model(const S390CPUModel *model)
79 {
80     uint16_t ibc = 0;
81 
82     if (model->def->gen >= S390_GEN_Z10) {
83         ibc = ((model->def->gen - S390_GEN_Z10) << 4) + model->def->ec_ga;
84     }
85     return ibc;
86 }
87 void s390_get_feat_block(S390FeatType type, uint8_t *data);
88 bool s390_has_feat(S390Feat feat);
89 uint8_t s390_get_gen_for_cpu_type(uint16_t type);
90 static inline bool s390_known_cpu_type(uint16_t type)
91 {
92     return s390_get_gen_for_cpu_type(type) != 0;
93 }
94 static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model)
95 {
96     return ((uint64_t)model->cpu_ver << 56) |
97            ((uint64_t)model->cpu_id << 32) |
98            ((uint64_t)model->def->type << 16) |
99            (model->def->gen == 7 ? 0 : (uint64_t)model->cpu_id_format << 15);
100 }
101 S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
102                                     S390FeatBitmap features);
103 
104 #ifdef CONFIG_KVM
105 bool kvm_s390_cpu_models_supported(void);
106 void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
107 void kvm_s390_apply_cpu_model(const S390CPUModel *model,  Error **errp);
108 #else
109 static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model,
110                                                Error **errp)
111 {
112 }
113 static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model,
114                                             Error **errp)
115 {
116 }
117 static inline bool kvm_s390_cpu_models_supported(void)
118 {
119     return false;
120 }
121 #endif
122 
123 #endif /* TARGET_S390X_CPU_MODELS_H */
124