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 */
21struct 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 */
44struct 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
76void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat);
77void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat);
78void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga,
79 S390FeatGroup group);
80uint32_t s390_get_hmfai(void);
81uint8_t s390_get_mha_pow(void);
82uint32_t s390_get_ibc_val(void);
83static 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}
92void s390_get_feat_block(S390FeatType type, uint8_t *data);
93bool s390_has_feat(S390Feat feat);
94uint8_t s390_get_gen_for_cpu_type(uint16_t type);
95static inline bool s390_known_cpu_type(uint16_t type)
96{
97 return s390_get_gen_for_cpu_type(type) != 0;
98}
99static 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}
106S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
107 S390FeatBitmap features);
108
109#ifdef CONFIG_KVM
110bool kvm_s390_cpu_models_supported(void);
111void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
112void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp);
113#else
114static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model,
115 Error **errp)
116{
117}
118static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model,
119 Error **errp)
120{
121}
122static inline bool kvm_s390_cpu_models_supported(void)
123{
124 return false;
125}
126#endif
127
128#endif /* TARGET_S390X_CPU_MODELS_H */
129