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Diffstat (limited to 'target/s390x/cpu_models.h')
| -rw-r--r-- | target/s390x/cpu_models.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/target/s390x/cpu_models.h b/target/s390x/cpu_models.h new file mode 100644 index 0000000000..136a602313 --- /dev/null +++ b/target/s390x/cpu_models.h @@ -0,0 +1,119 @@ +/* + * CPU models for s390x + * + * Copyright 2016 IBM Corp. + * + * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ + +#ifndef TARGET_S390X_CPU_MODELS_H +#define TARGET_S390X_CPU_MODELS_H + +#include "cpu_features.h" +#include "qom/cpu.h" + +/* static CPU definition */ +typedef struct S390CPUDef { + const char *name; /* name exposed to the user */ + const char *desc; /* description exposed to the user */ + uint8_t gen; /* hw generation identification */ + uint16_t type; /* cpu type identification */ + uint8_t ec_ga; /* EC GA version (on which also the BC is based) */ + uint8_t mha_pow; /* Maximum Host Adress Power, mha = 2^pow-1 */ + uint32_t hmfai; /* hypervisor-managed facilities */ + /* base/min features, must never be changed between QEMU versions */ + S390FeatBitmap base_feat; + /* used to init base_feat from generated data */ + S390FeatInit base_init; + /* deafault features, QEMU version specific */ + S390FeatBitmap default_feat; + /* used to init default_feat from generated data */ + S390FeatInit default_init; + /* max allowed features, QEMU version specific */ + S390FeatBitmap full_feat; + /* used to init full_feat from generated data */ + S390FeatInit full_init; +} S390CPUDef; + +/* CPU model based on a CPU definition */ +typedef struct S390CPUModel { + const S390CPUDef *def; + S390FeatBitmap features; + /* values copied from the "host" model, can change during migration */ + uint16_t lowest_ibc; /* lowest IBC that the hardware supports */ + uint32_t cpu_id; /* CPU id */ + uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */ +} S390CPUModel; + +/* + * CPU ID + * + * bits 0-7: Zeroes (ff for kvm) + * bits 8-31: CPU ID (serial number) + * bits 32-48: Machine type + * bits 48-63: Zeroes + */ +#define cpuid_type(x) (((x) >> 16) & 0xffff) +#define cpuid_id(x) (((x) >> 32) & 0xffffff) +#define cpuid_ver(x) (((x) >> 56) & 0xff) + +#define lowest_ibc(x) (((uint32_t)(x) >> 16) & 0xfff) +#define unblocked_ibc(x) ((uint32_t)(x) & 0xfff) +#define has_ibc(x) (lowest_ibc(x) != 0) + +#define S390_GEN_Z10 0xa +#define ibc_gen(x) (x == 0 ? 0 : ((x >> 4) + S390_GEN_Z10)) +#define ibc_ec_ga(x) (x & 0xf) + +uint32_t s390_get_hmfai(void); +uint8_t s390_get_mha_pow(void); +uint32_t s390_get_ibc_val(void); +static inline uint16_t s390_ibc_from_cpu_model(const S390CPUModel *model) +{ + uint16_t ibc = 0; + + if (model->def->gen >= S390_GEN_Z10) { + ibc = ((model->def->gen - S390_GEN_Z10) << 4) + model->def->ec_ga; + } + return ibc; +} +void s390_get_feat_block(S390FeatType type, uint8_t *data); +bool s390_has_feat(S390Feat feat); +uint8_t s390_get_gen_for_cpu_type(uint16_t type); +static inline bool s390_known_cpu_type(uint16_t type) +{ + return s390_get_gen_for_cpu_type(type) != 0; +} +static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model) +{ + return ((uint64_t)model->cpu_ver << 56) | + ((uint64_t)model->cpu_id << 32) | + ((uint64_t)model->def->type << 16); +} +S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga, + S390FeatBitmap features); + +#ifdef CONFIG_KVM +bool kvm_s390_cpu_models_supported(void); +void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp); +void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp); +#else +static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model, + Error **errp) +{ +} +static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model, + Error **errp) +{ +} +static inline bool kvm_s390_cpu_models_supported(void) +{ + return false; +} +#endif + +#endif /* TARGET_S390X_CPU_MODELS_H */ |