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129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/*
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* CPU models for s390x
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*
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* Copyright 2016 IBM Corp.
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*
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* Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef TARGET_S390X_CPU_MODELS_H
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#define TARGET_S390X_CPU_MODELS_H
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#include "cpu_features.h"
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#include "target/s390x/gen-features.h"
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#include "hw/core/cpu.h"
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/* static CPU definition */
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struct S390CPUDef {
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const char *name; /* name exposed to the user */
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const char *desc; /* description exposed to the user */
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uint8_t gen; /* hw generation identification */
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uint16_t type; /* cpu type identification */
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uint8_t ec_ga; /* EC GA version (on which also the BC is based) */
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uint8_t mha_pow; /* maximum host address power, mha = 2^pow-1 */
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uint32_t hmfai; /* hypervisor-managed facilities */
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/* base/min features, must never be changed between QEMU versions */
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S390FeatBitmap base_feat;
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/* used to init base_feat from generated data */
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S390FeatInit base_init;
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/* default features, QEMU version specific */
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S390FeatBitmap default_feat;
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/* used to init default_feat from generated data */
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S390FeatInit default_init;
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/* max allowed features, QEMU version specific */
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S390FeatBitmap full_feat;
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/* used to init full_feat from generated data */
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S390FeatInit full_init;
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};
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/* CPU model based on a CPU definition */
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struct S390CPUModel {
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const S390CPUDef *def;
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S390FeatBitmap features;
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/* values copied from the "host" model, can change during migration */
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uint16_t lowest_ibc; /* lowest IBC that the hardware supports */
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uint32_t cpu_id; /* CPU id */
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uint8_t cpu_id_format; /* CPU id format bit */
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uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */
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};
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/*
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* CPU ID
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*
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* bits 0-7: Zeroes (ff for kvm)
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* bits 8-31: CPU ID (serial number)
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* bits 32-47: Machine type
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* bit 48: CPU ID format
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* bits 49-63: Zeroes
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*/
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#define cpuid_type(x) (((x) >> 16) & 0xffff)
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#define cpuid_id(x) (((x) >> 32) & 0xffffff)
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#define cpuid_ver(x) (((x) >> 56) & 0xff)
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#define cpuid_format(x) (((x) >> 15) & 0x1)
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#define lowest_ibc(x) (((uint32_t)(x) >> 16) & 0xfff)
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#define unblocked_ibc(x) ((uint32_t)(x) & 0xfff)
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#define has_ibc(x) (lowest_ibc(x) != 0)
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#define S390_GEN_Z10 0xa
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#define ibc_gen(x) (x == 0 ? 0 : ((x >> 4) + S390_GEN_Z10))
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#define ibc_ec_ga(x) (x & 0xf)
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void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat);
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void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat);
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void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga,
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S390FeatGroup group);
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uint32_t s390_get_hmfai(void);
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uint8_t s390_get_mha_pow(void);
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uint32_t s390_get_ibc_val(void);
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static inline uint16_t s390_ibc_from_cpu_model(const S390CPUModel *model)
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{
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uint16_t ibc = 0;
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if (model->def->gen >= S390_GEN_Z10) {
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ibc = ((model->def->gen - S390_GEN_Z10) << 4) + model->def->ec_ga;
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}
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return ibc;
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}
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void s390_get_feat_block(S390FeatType type, uint8_t *data);
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bool s390_has_feat(S390Feat feat);
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uint8_t s390_get_gen_for_cpu_type(uint16_t type);
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static inline bool s390_known_cpu_type(uint16_t type)
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{
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return s390_get_gen_for_cpu_type(type) != 0;
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}
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static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model)
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{
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return ((uint64_t)model->cpu_ver << 56) |
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((uint64_t)model->cpu_id << 32) |
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((uint64_t)model->def->type << 16) |
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(model->def->gen == 7 ? 0 : (uint64_t)model->cpu_id_format << 15);
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}
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S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
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S390FeatBitmap features);
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#ifdef CONFIG_KVM
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bool kvm_s390_cpu_models_supported(void);
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void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
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void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp);
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#else
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static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model,
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Error **errp)
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{
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}
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static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model,
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Error **errp)
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{
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}
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static inline bool kvm_s390_cpu_models_supported(void)
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{
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return false;
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}
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#endif
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#endif /* TARGET_S390X_CPU_MODELS_H */
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