cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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cpu_models.h (4462B)

      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 "target/s390x/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 */