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/*
* 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 "target/s390x/gen-features.h"
#include "hw/core/cpu.h"
/* static CPU definition */
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 address 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;
/* default 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;
};
/* CPU model based on a CPU definition */
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_id_format; /* CPU id format bit */
uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */
};
/*
* CPU ID
*
* bits 0-7: Zeroes (ff for kvm)
* bits 8-31: CPU ID (serial number)
* bits 32-47: Machine type
* bit 48: CPU ID format
* bits 49-63: Zeroes
*/
#define cpuid_type(x) (((x) >> 16) & 0xffff)
#define cpuid_id(x) (((x) >> 32) & 0xffffff)
#define cpuid_ver(x) (((x) >> 56) & 0xff)
#define cpuid_format(x) (((x) >> 15) & 0x1)
#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)
void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat);
void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat);
void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga,
S390FeatGroup group);
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;
}
#define CPU_ID_SHIFT 32
#define CPU_ID_BITS 24
/*
* When cpu_id_format is 0 (basic mode), the leftmost 4 bits of cpu_id contain
* the rightmost 4 bits of the physical CPU address.
*/
#define CPU_PHYS_ADDR_BITS 4
#define CPU_PHYS_ADDR_SHIFT (CPU_ID_SHIFT + CPU_ID_BITS - CPU_PHYS_ADDR_BITS)
static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model)
{
return ((uint64_t)model->cpu_ver << 56) |
((uint64_t)model->cpu_id << CPU_ID_SHIFT) |
((uint64_t)model->def->type << 16) |
(model->def->gen == 7 ? 0 : (uint64_t)model->cpu_id_format << 15);
}
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 */
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