unicorn/qemu/target/s390x/cpu_models.c
2021-12-31 10:05:05 +08:00

523 lines
17 KiB
C

/*
* 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.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "internal.h"
#include "sysemu/tcg.h"
#include "qemu-common.h"
//#include "hw/pci/pci.h"
#define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
{ \
.name = _name, \
.type = _type, \
.gen = _gen, \
.ec_ga = _ec_ga, \
.mha_pow = _mha_pow, \
.hmfai = _hmfai, \
.desc = _desc, \
.base_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _BASE }, \
.default_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _DEFAULT }, \
.full_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _FULL }, \
}
/*
* CPU definition list in order of release. Up to generation 14 base features
* of a following release have been a superset of the previous release. With
* generation 15 one base feature and one optional feature have been deprecated.
*/
static S390CPUDef s390_cpu_defs[] = {
CPUDEF_INIT(0x2064, 7, 1, 38, 0x00000000U, "z900", "IBM zSeries 900 GA1"),
CPUDEF_INIT(0x2064, 7, 2, 38, 0x00000000U, "z900.2", "IBM zSeries 900 GA2"),
CPUDEF_INIT(0x2064, 7, 3, 38, 0x00000000U, "z900.3", "IBM zSeries 900 GA3"),
CPUDEF_INIT(0x2066, 7, 3, 38, 0x00000000U, "z800", "IBM zSeries 800 GA1"),
CPUDEF_INIT(0x2084, 8, 1, 38, 0x00000000U, "z990", "IBM zSeries 990 GA1"),
CPUDEF_INIT(0x2084, 8, 2, 38, 0x00000000U, "z990.2", "IBM zSeries 990 GA2"),
CPUDEF_INIT(0x2084, 8, 3, 38, 0x00000000U, "z990.3", "IBM zSeries 990 GA3"),
CPUDEF_INIT(0x2086, 8, 3, 38, 0x00000000U, "z890", "IBM zSeries 880 GA1"),
CPUDEF_INIT(0x2084, 8, 4, 38, 0x00000000U, "z990.4", "IBM zSeries 990 GA4"),
CPUDEF_INIT(0x2086, 8, 4, 38, 0x00000000U, "z890.2", "IBM zSeries 880 GA2"),
CPUDEF_INIT(0x2084, 8, 5, 38, 0x00000000U, "z990.5", "IBM zSeries 990 GA5"),
CPUDEF_INIT(0x2086, 8, 5, 38, 0x00000000U, "z890.3", "IBM zSeries 880 GA3"),
CPUDEF_INIT(0x2094, 9, 1, 40, 0x00000000U, "z9EC", "IBM System z9 EC GA1"),
CPUDEF_INIT(0x2094, 9, 2, 40, 0x00000000U, "z9EC.2", "IBM System z9 EC GA2"),
CPUDEF_INIT(0x2096, 9, 2, 40, 0x00000000U, "z9BC", "IBM System z9 BC GA1"),
CPUDEF_INIT(0x2094, 9, 3, 40, 0x00000000U, "z9EC.3", "IBM System z9 EC GA3"),
CPUDEF_INIT(0x2096, 9, 3, 40, 0x00000000U, "z9BC.2", "IBM System z9 BC GA2"),
CPUDEF_INIT(0x2097, 10, 1, 43, 0x00000000U, "z10EC", "IBM System z10 EC GA1"),
CPUDEF_INIT(0x2097, 10, 2, 43, 0x00000000U, "z10EC.2", "IBM System z10 EC GA2"),
CPUDEF_INIT(0x2098, 10, 2, 43, 0x00000000U, "z10BC", "IBM System z10 BC GA1"),
CPUDEF_INIT(0x2097, 10, 3, 43, 0x00000000U, "z10EC.3", "IBM System z10 EC GA3"),
CPUDEF_INIT(0x2098, 10, 3, 43, 0x00000000U, "z10BC.2", "IBM System z10 BC GA2"),
CPUDEF_INIT(0x2817, 11, 1, 44, 0x08000000U, "z196", "IBM zEnterprise 196 GA1"),
CPUDEF_INIT(0x2817, 11, 2, 44, 0x08000000U, "z196.2", "IBM zEnterprise 196 GA2"),
CPUDEF_INIT(0x2818, 11, 2, 44, 0x08000000U, "z114", "IBM zEnterprise 114 GA1"),
CPUDEF_INIT(0x2827, 12, 1, 44, 0x08000000U, "zEC12", "IBM zEnterprise EC12 GA1"),
CPUDEF_INIT(0x2827, 12, 2, 44, 0x08000000U, "zEC12.2", "IBM zEnterprise EC12 GA2"),
CPUDEF_INIT(0x2828, 12, 2, 44, 0x08000000U, "zBC12", "IBM zEnterprise BC12 GA1"),
CPUDEF_INIT(0x2964, 13, 1, 47, 0x08000000U, "z13", "IBM z13 GA1"),
CPUDEF_INIT(0x2964, 13, 2, 47, 0x08000000U, "z13.2", "IBM z13 GA2"),
CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"),
CPUDEF_INIT(0x3906, 14, 1, 47, 0x08000000U, "z14", "IBM z14 GA1"),
CPUDEF_INIT(0x3906, 14, 2, 47, 0x08000000U, "z14.2", "IBM z14 GA2"),
CPUDEF_INIT(0x3907, 14, 1, 47, 0x08000000U, "z14ZR1", "IBM z14 Model ZR1 GA1"),
CPUDEF_INIT(0x8561, 15, 1, 47, 0x08000000U, "gen15a", "IBM z15 GA1"),
CPUDEF_INIT(0x8562, 15, 1, 47, 0x08000000U, "gen15b", "IBM 8562 GA1"),
};
#define QEMU_MAX_CPU_TYPE 0x2964
#define QEMU_MAX_CPU_GEN 13
#define QEMU_MAX_CPU_EC_GA 2
static const S390FeatInit qemu_max_cpu_feat_init = { S390_FEAT_LIST_QEMU_MAX };
static S390FeatBitmap qemu_max_cpu_feat;
/* features part of a base model but not relevant for finding a base model */
S390FeatBitmap ignored_base_feat;
void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat)
{
const S390CPUDef *def;
def = s390_find_cpu_def(0, gen, ec_ga, NULL);
clear_bit(feat, (unsigned long *)&def->default_feat);
}
void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat)
{
int i;
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
const S390CPUDef *def = &s390_cpu_defs[i];
if (def->gen < gen) {
continue;
}
if (def->gen == gen && def->ec_ga < ec_ga) {
continue;
}
clear_bit(feat, (unsigned long *)&def->default_feat);
}
}
void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga,
S390FeatGroup group)
{
const S390FeatGroupDef *group_def = s390_feat_group_def(group);
S390FeatBitmap group_def_off;
int i;
bitmap_complement(group_def_off, group_def->feat, S390_FEAT_MAX);
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
const S390CPUDef *cpu_def = &s390_cpu_defs[i];
if (cpu_def->gen < gen) {
continue;
}
if (cpu_def->gen == gen && cpu_def->ec_ga < ec_ga) {
continue;
}
bitmap_and((unsigned long *)&cpu_def->default_feat,
cpu_def->default_feat, group_def_off, S390_FEAT_MAX);
}
}
uint32_t s390_get_hmfai(void)
{
static S390CPU *cpu;
if (!cpu) {
cpu = S390_CPU(qemu_get_cpu(NULL, 0));
}
if (!cpu || !cpu->model) {
return 0;
}
return cpu->model->def->hmfai;
}
uint8_t s390_get_mha_pow(void)
{
static S390CPU *cpu;
if (!cpu) {
cpu = S390_CPU(qemu_get_cpu(NULL, 0));
}
if (!cpu || !cpu->model) {
return 0;
}
return cpu->model->def->mha_pow;
}
uint32_t s390_get_ibc_val(void)
{
uint16_t unblocked_ibc, lowest_ibc;
static S390CPU *cpu;
if (!cpu) {
cpu = S390_CPU(qemu_get_cpu(NULL, 0));
}
if (!cpu || !cpu->model) {
return 0;
}
unblocked_ibc = s390_ibc_from_cpu_model(cpu->model);
lowest_ibc = cpu->model->lowest_ibc;
/* the lowest_ibc always has to be <= unblocked_ibc */
if (!lowest_ibc || lowest_ibc > unblocked_ibc) {
return 0;
}
return ((uint32_t) lowest_ibc << 16) | unblocked_ibc;
}
void s390_get_feat_block(struct uc_struct *uc, S390FeatType type, uint8_t *data)
{
S390CPU *cpu = S390_CPU(qemu_get_cpu(uc, 0));
s390_fill_feat_block(cpu->model->features, type, data);
}
bool s390_has_feat(struct uc_struct *uc, S390Feat feat)
{
S390CPU *cpu = S390_CPU(qemu_get_cpu(uc, 0));
if (!cpu->model) {
if (feat == S390_FEAT_ZPCI) {
return true;
}
return false;
}
return test_bit(feat, cpu->model->features);
}
uint8_t s390_get_gen_for_cpu_type(uint16_t type)
{
int i;
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
if (s390_cpu_defs[i].type == type) {
return s390_cpu_defs[i].gen;
}
}
return 0;
}
const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
S390FeatBitmap features)
{
const S390CPUDef *last_compatible = NULL;
const S390CPUDef *matching_cpu_type = NULL;
int i;
if (!gen) {
ec_ga = 0;
}
if (!gen && type) {
gen = s390_get_gen_for_cpu_type(type);
}
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
const S390CPUDef *def = &s390_cpu_defs[i];
S390FeatBitmap missing;
/* don't even try newer generations if we know the generation */
if (gen) {
if (def->gen > gen) {
break;
} else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) {
break;
}
}
if (features) {
/* see if the model satisfies the minimum features */
bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX);
/*
* Ignore certain features that are in the base model, but not
* relevant for the search (esp. MSA subfunctions).
*/
bitmap_andnot(missing, missing, ignored_base_feat, S390_FEAT_MAX);
if (!bitmap_empty(missing, S390_FEAT_MAX)) {
break;
}
}
/* stop the search if we found the exact model */
if (def->type == type && def->ec_ga == ec_ga) {
return def;
}
/* remember if we've at least seen one with the same cpu type */
if (def->type == type) {
matching_cpu_type = def;
}
last_compatible = def;
}
/* prefer the model with the same cpu type, esp. don't take the BC for EC */
if (matching_cpu_type) {
return matching_cpu_type;
}
return last_compatible;
}
static S390CPUModel *get_max_cpu_model(void);
static S390CPUModel *get_max_cpu_model(void)
{
static S390CPUModel max_model;
static bool cached;
if (cached) {
return &max_model;
}
max_model.def = s390_find_cpu_def(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
QEMU_MAX_CPU_EC_GA, NULL);
bitmap_copy(max_model.features, qemu_max_cpu_feat, S390_FEAT_MAX);
cached = true;
return &max_model;
}
static inline void apply_cpu_model(const S390CPUModel *model)
{
static S390CPUModel applied_model;
static bool applied;
/*
* We have the same model for all VCPUs. KVM can only be configured before
* any VCPUs are defined in KVM.
*/
if (applied) {
if (model && memcmp(&applied_model, model, sizeof(S390CPUModel))) {
// error_setg(errp, "Mixed CPU models are not supported on s390x.");
}
return;
}
applied = true;
if (model) {
applied_model = *model;
}
}
void s390_realize_cpu_model(CPUState *cs)
{
S390CPU *cpu = S390_CPU(cs);
const S390CPUModel *max_model;
if (!cpu->model) {
/* no host model support -> perform compatibility stuff */
apply_cpu_model(NULL);
return;
}
max_model = get_max_cpu_model();
if (!max_model) {
//error_prepend(errp, "CPU models are not available: ");
return;
}
/* copy over properties that can vary */
cpu->model->lowest_ibc = max_model->lowest_ibc;
cpu->model->cpu_id = max_model->cpu_id;
cpu->model->cpu_id_format = max_model->cpu_id_format;
cpu->model->cpu_ver = max_model->cpu_ver;
apply_cpu_model(cpu->model);
cpu->env.cpuid = s390_cpuid_from_cpu_model(cpu->model);
/* basic mode, write the cpu address into the first 4 bit of the ID */
cpu->env.cpuid = deposit64(cpu->env.cpuid, 54, 4, cpu->env.core_id);
}
static void s390_cpu_model_initfn(CPUState *obj)
{
S390CPU *cpu = S390_CPU(obj);
S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu);
cpu->model = g_malloc0(sizeof(*cpu->model));
/* copy the model, so we can modify it */
cpu->model->def = xcc->cpu_def;
if (xcc->is_static) {
/* base model - features will never change */
bitmap_copy(cpu->model->features, cpu->model->def->base_feat,
S390_FEAT_MAX);
} else {
/* latest model - features can change */
bitmap_copy(cpu->model->features,
cpu->model->def->default_feat, S390_FEAT_MAX);
}
}
static S390CPUDef s390_qemu_cpu_def;
static S390CPUModel s390_qemu_cpu_model;
/* Set the qemu CPU model (on machine initialization). Must not be called
* once CPUs have been created.
*/
void s390_set_qemu_cpu_model(uint16_t type, uint8_t gen, uint8_t ec_ga,
const S390FeatInit feat_init)
{
const S390CPUDef *def = s390_find_cpu_def(type, gen, ec_ga, NULL);
g_assert(def);
//g_assert(QTAILQ_EMPTY_RCU(&cpus));
/* TCG emulates some features that can usually not be enabled with
* the emulated machine generation. Make sure they can be enabled
* when using the QEMU model by adding them to full_feat. We have
* to copy the definition to do that.
*/
memcpy(&s390_qemu_cpu_def, def, sizeof(s390_qemu_cpu_def));
bitmap_or(s390_qemu_cpu_def.full_feat, s390_qemu_cpu_def.full_feat,
qemu_max_cpu_feat, S390_FEAT_MAX);
/* build the CPU model */
s390_qemu_cpu_model.def = &s390_qemu_cpu_def;
bitmap_zero(s390_qemu_cpu_model.features, S390_FEAT_MAX);
s390_init_feat_bitmap(feat_init, s390_qemu_cpu_model.features);
}
static void s390_qemu_cpu_model_initfn(CPUState *obj)
{
S390CPU *cpu = S390_CPU(obj);
cpu->model = g_malloc0(sizeof(*cpu->model));
/* copy the CPU model so we can modify it */
memcpy(cpu->model, &s390_qemu_cpu_model, sizeof(*cpu->model));
}
static void s390_max_cpu_model_initfn(CPUState *obj)
{
const S390CPUModel *max_model;
S390CPU *cpu = S390_CPU(obj);
max_model = get_max_cpu_model();
cpu->model = g_new(S390CPUModel, 1);
/* copy the CPU model so we can modify it */
memcpy(cpu->model, max_model, sizeof(*cpu->model));
}
void s390_cpu_model_finalize(CPUState *obj)
{
S390CPU *cpu = S390_CPU(obj);
g_free(cpu->model);
g_free(cpu->ss.keydata);
cpu->model = NULL;
}
static void s390_base_cpu_model_class_init(struct uc_struct *uc, CPUClass *oc, void *data)
{
S390CPUClass *xcc = S390_CPU_CLASS(oc);
/* all base models are migration safe */
xcc->cpu_def = (const S390CPUDef *) data;
xcc->is_static = true;
// xcc->desc = xcc->cpu_def->desc;
}
static void s390_cpu_model_class_init(struct uc_struct *uc, CPUClass *oc, void *data)
{
S390CPUClass *xcc = S390_CPU_CLASS(oc);
/* model that can change between QEMU versions */
xcc->cpu_def = (const S390CPUDef *) data;
// xcc->is_migration_safe = true;
// xcc->desc = xcc->cpu_def->desc;
}
static void s390_qemu_cpu_model_class_init(struct uc_struct *uc, CPUClass *oc, void *data)
{
//S390CPUClass *xcc = S390_CPU_CLASS(oc);
//xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s",
// qemu_hw_version());
}
static void s390_max_cpu_model_class_init(struct uc_struct *uc, CPUClass *oc, void *data)
{
//S390CPUClass *xcc = S390_CPU_CLASS(oc);
/*
* The "max" model is neither static nor migration safe. Under KVM
* it represents the "host" model. Under TCG it represents some kind of
* "qemu" CPU model without compat handling and maybe with some additional
* CPU features that are not yet unlocked in the "qemu" model.
*/
//xcc->desc =
// "Enables all features supported by the accelerator in the current host";
}
static void init_ignored_base_feat(void)
{
static const int feats[] = {
/* MSA subfunctions that could not be available on certain machines */
S390_FEAT_KMAC_DEA,
S390_FEAT_KMAC_TDEA_128,
S390_FEAT_KMAC_TDEA_192,
S390_FEAT_KMC_DEA,
S390_FEAT_KMC_TDEA_128,
S390_FEAT_KMC_TDEA_192,
S390_FEAT_KM_DEA,
S390_FEAT_KM_TDEA_128,
S390_FEAT_KM_TDEA_192,
S390_FEAT_KIMD_SHA_1,
S390_FEAT_KLMD_SHA_1,
/* CSSKE is deprecated on newer generations */
S390_FEAT_CONDITIONAL_SSKE,
};
int i;
for (i = 0; i < ARRAY_SIZE(feats); i++) {
set_bit(feats[i], ignored_base_feat);
}
}
void s390_init_cpu_model(uc_engine *uc, uc_cpu_s390x cpu_model)
{
static const S390FeatInit qemu_latest_init = { S390_FEAT_LIST_QEMU_LATEST };
int i;
init_ignored_base_feat();
/* init all bitmaps from gnerated data initially */
s390_init_feat_bitmap(qemu_max_cpu_feat_init, qemu_max_cpu_feat);
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
s390_cpu_defs[i].base_feat);
s390_init_feat_bitmap(s390_cpu_defs[i].default_init,
s390_cpu_defs[i].default_feat);
s390_init_feat_bitmap(s390_cpu_defs[i].full_init,
s390_cpu_defs[i].full_feat);
}
/* initialize the qemu model with latest definition */
s390_set_qemu_cpu_model(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
QEMU_MAX_CPU_EC_GA, qemu_latest_init);
if (cpu_model < ARRAY_SIZE(s390_cpu_defs)) {
s390_base_cpu_model_class_init(uc, uc->cpu->cc, (void *) &s390_cpu_defs[cpu_model]);
s390_cpu_model_class_init(uc, uc->cpu->cc, (void *) &s390_cpu_defs[cpu_model]);
s390_cpu_model_initfn(uc->cpu);
} else if (cpu_model == UC_CPU_S390X_MAX) {
s390_max_cpu_model_class_init(uc, uc->cpu->cc, NULL);
s390_max_cpu_model_initfn(uc->cpu);
} else if (cpu_model == UC_CPU_S390X_QEMU) {
s390_qemu_cpu_model_class_init(uc, uc->cpu->cc, NULL);
s390_qemu_cpu_model_initfn(uc->cpu);
}
}