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qemu/target-s390x/cpu_models.c
David Hildenbrand f1a47d08ef s390x/cpumodel: implement QMP interface "query-cpu-model-baseline" 
Let's implement that interface by reusing our conversion code and
lookup code for CPU definitions.

In order to find a compatible CPU model, we first detect the maximum
possible CPU generation and then try to find a maximum model, satisfying
all base features (not exceeding the maximum generation).

Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Message-Id: <20160905085244.99980-31-dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-09-06 17:06:51 +02:00

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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.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "gen-features.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "qemu/error-report.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp-input-visitor.h"
#include "qapi/qmp/qbool.h"
#ifndef CONFIG_USER_ONLY
#include "sysemu/arch_init.h"
#endif
#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 definiton list in order of release. For now, base features of a
* following release are always a subset of base features of the previous
* release. Same is correct for the other feature sets.
* A BC release always follows the corresponding EC release.
*/
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"),
};
uint32_t s390_get_hmfai(void)
{
static S390CPU *cpu;
if (!cpu) {
cpu = S390_CPU(qemu_get_cpu(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(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(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(S390FeatType type, uint8_t *data)
{
static S390CPU *cpu;
if (!cpu) {
cpu = S390_CPU(qemu_get_cpu(0));
}
if (!cpu || !cpu->model) {
return;
}
s390_fill_feat_block(cpu->model->features, type, data);
}
bool s390_has_feat(S390Feat feat)
{
static S390CPU *cpu;
if (!cpu) {
cpu = S390_CPU(qemu_get_cpu(0));
}
if (!cpu || !cpu->model) {
#ifdef CONFIG_KVM
if (kvm_enabled()) {
if (feat == S390_FEAT_VECTOR) {
return kvm_check_extension(kvm_state,
KVM_CAP_S390_VECTOR_REGISTERS);
}
if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) {
return kvm_s390_get_ri();
}
if (feat == S390_FEAT_MSA_EXT_3) {
return true;
}
}
#endif
return 0;
}
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;
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);
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;
}
last_compatible = def;
}
return last_compatible;
}
struct S390PrintCpuListInfo {
FILE *f;
fprintf_function print;
};
static void print_cpu_model_list(ObjectClass *klass, void *opaque)
{
struct S390PrintCpuListInfo *info = opaque;
S390CPUClass *scc = S390_CPU_CLASS(klass);
char *name = g_strdup(object_class_get_name(klass));
const char *details = "";
if (scc->is_static) {
details = "(static, migration-safe)";
} else if (scc->is_migration_safe) {
details = "(migration-safe)";
}
/* strip off the -s390-cpu */
g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0;
(*info->print)(info->f, "s390 %-15s %-35s %s\n", name, scc->desc,
details);
g_free(name);
}
void s390_cpu_list(FILE *f, fprintf_function print)
{
struct S390PrintCpuListInfo info = {
.f = f,
.print = print,
};
S390FeatGroup group;
S390Feat feat;
object_class_foreach(print_cpu_model_list, TYPE_S390_CPU, false, &info);
(*print)(f, "\nRecognized feature flags:\n");
for (feat = 0; feat < S390_FEAT_MAX; feat++) {
const S390FeatDef *def = s390_feat_def(feat);
(*print)(f, "%-20s %-50s\n", def->name, def->desc);
}
(*print)(f, "\nRecognized feature groups:\n");
for (group = 0; group < S390_FEAT_GROUP_MAX; group++) {
const S390FeatGroupDef *def = s390_feat_group_def(group);
(*print)(f, "%-20s %-50s\n", def->name, def->desc);
}
}
#ifndef CONFIG_USER_ONLY
static void create_cpu_model_list(ObjectClass *klass, void *opaque)
{
CpuDefinitionInfoList **cpu_list = opaque;
CpuDefinitionInfoList *entry;
CpuDefinitionInfo *info;
char *name = g_strdup(object_class_get_name(klass));
S390CPUClass *scc = S390_CPU_CLASS(klass);
/* strip off the -s390-cpu */
g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0;
info = g_malloc0(sizeof(*info));
info->name = name;
info->has_migration_safe = true;
info->migration_safe = scc->is_migration_safe;
info->q_static = scc->is_static;
entry = g_malloc0(sizeof(*entry));
entry->value = info;
entry->next = *cpu_list;
*cpu_list = entry;
}
CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
{
CpuDefinitionInfoList *list = NULL;
object_class_foreach(create_cpu_model_list, TYPE_S390_CPU, false, &list);
return list;
}
static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info,
Error **errp)
{
const QDict *qdict = NULL;
const QDictEntry *e;
Visitor *visitor;
ObjectClass *oc;
S390CPU *cpu;
Object *obj;
if (info->props) {
qdict = qobject_to_qdict(info->props);
if (!qdict) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
return;
}
}
oc = cpu_class_by_name(TYPE_S390_CPU, info->name);
if (!oc) {
error_setg(errp, "The CPU definition \'%s\' is unknown.", info->name);
return;
}
if (S390_CPU_CLASS(oc)->kvm_required && !kvm_enabled()) {
error_setg(errp, "The CPU definition '%s' requires KVM", info->name);
return;
}
obj = object_new(object_class_get_name(oc));
cpu = S390_CPU(obj);
if (!cpu->model) {
error_setg(errp, "Details about the host CPU model are not available, "
"it cannot be used.");
object_unref(obj);
return;
}
if (qdict) {
visitor = qmp_input_visitor_new(info->props, true);
visit_start_struct(visitor, NULL, NULL, 0, errp);
if (*errp) {
object_unref(obj);
return;
}
for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
object_property_set(obj, visitor, e->key, errp);
if (*errp) {
break;
}
}
if (!*errp) {
visit_check_struct(visitor, errp);
}
visit_end_struct(visitor, NULL);
visit_free(visitor);
if (*errp) {
object_unref(obj);
return;
}
}
/* copy the model and throw the cpu away */
memcpy(model, cpu->model, sizeof(*model));
object_unref(obj);
}
static void qdict_add_disabled_feat(const char *name, void *opaque)
{
qdict_put((QDict *) opaque, name, qbool_from_bool(false));
}
static void qdict_add_enabled_feat(const char *name, void *opaque)
{
qdict_put((QDict *) opaque, name, qbool_from_bool(true));
}
/* convert S390CPUDef into a static CpuModelInfo */
static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model,
bool delta_changes)
{
QDict *qdict = qdict_new();
S390FeatBitmap bitmap;
/* always fallback to the static base model */
info->name = g_strdup_printf("%s-base", model->def->name);
if (delta_changes) {
/* features deleted from the base feature set */
bitmap_andnot(bitmap, model->def->base_feat, model->features,
S390_FEAT_MAX);
if (!bitmap_empty(bitmap, S390_FEAT_MAX)) {
s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat);
}
/* features added to the base feature set */
bitmap_andnot(bitmap, model->features, model->def->base_feat,
S390_FEAT_MAX);
if (!bitmap_empty(bitmap, S390_FEAT_MAX)) {
s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_enabled_feat);
}
} else {
/* expand all features */
s390_feat_bitmap_to_ascii(model->features, qdict,
qdict_add_enabled_feat);
bitmap_complement(bitmap, model->features, S390_FEAT_MAX);
s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat);
}
if (!qdict_size(qdict)) {
QDECREF(qdict);
} else {
info->props = QOBJECT(qdict);
info->has_props = true;
}
}
CpuModelExpansionInfo *arch_query_cpu_model_expansion(CpuModelExpansionType type,
CpuModelInfo *model,
Error **errp)
{
CpuModelExpansionInfo *expansion_info = NULL;
S390CPUModel s390_model;
bool delta_changes = false;
/* convert it to our internal representation */
cpu_model_from_info(&s390_model, model, errp);
if (*errp) {
return NULL;
}
if (type == CPU_MODEL_EXPANSION_TYPE_STATIC) {
delta_changes = true;
} else if (type != CPU_MODEL_EXPANSION_TYPE_FULL) {
error_setg(errp, "The requested expansion type is not supported.");
return NULL;
}
/* convert it back to a static representation */
expansion_info = g_malloc0(sizeof(*expansion_info));
expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
cpu_info_from_model(expansion_info->model, &s390_model, delta_changes);
return expansion_info;
}
static void list_add_feat(const char *name, void *opaque)
{
strList **last = (strList **) opaque;
strList *entry;
entry = g_malloc0(sizeof(*entry));
entry->value = g_strdup(name);
entry->next = *last;
*last = entry;
}
CpuModelCompareInfo *arch_query_cpu_model_comparison(CpuModelInfo *infoa,
CpuModelInfo *infob,
Error **errp)
{
CpuModelCompareResult feat_result, gen_result;
CpuModelCompareInfo *compare_info;
S390FeatBitmap missing, added;
S390CPUModel modela, modelb;
/* convert both models to our internal representation */
cpu_model_from_info(&modela, infoa, errp);
if (*errp) {
return NULL;
}
cpu_model_from_info(&modelb, infob, errp);
if (*errp) {
return NULL;
}
compare_info = g_malloc0(sizeof(*compare_info));
/* check the cpu generation and ga level */
if (modela.def->gen == modelb.def->gen) {
if (modela.def->ec_ga == modelb.def->ec_ga) {
/* ec and corresponding bc are identical */
gen_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL;
} else if (modela.def->ec_ga < modelb.def->ec_ga) {
gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
} else {
gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
}
} else if (modela.def->gen < modelb.def->gen) {
gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
} else {
gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
}
if (gen_result != CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
/* both models cannot be made identical */
list_add_feat("type", &compare_info->responsible_properties);
}
/* check the feature set */
if (bitmap_equal(modela.features, modelb.features, S390_FEAT_MAX)) {
feat_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL;
} else {
bitmap_andnot(missing, modela.features, modelb.features, S390_FEAT_MAX);
s390_feat_bitmap_to_ascii(missing,
&compare_info->responsible_properties,
list_add_feat);
bitmap_andnot(added, modelb.features, modela.features, S390_FEAT_MAX);
s390_feat_bitmap_to_ascii(added, &compare_info->responsible_properties,
list_add_feat);
if (bitmap_empty(missing, S390_FEAT_MAX)) {
feat_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
} else if (bitmap_empty(added, S390_FEAT_MAX)) {
feat_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
} else {
feat_result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE;
}
}
/* combine the results */
if (gen_result == feat_result) {
compare_info->result = gen_result;
} else if (feat_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
compare_info->result = gen_result;
} else if (gen_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
compare_info->result = feat_result;
} else {
compare_info->result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE;
}
return compare_info;
}
CpuModelBaselineInfo *arch_query_cpu_model_baseline(CpuModelInfo *infoa,
CpuModelInfo *infob,
Error **errp)
{
CpuModelBaselineInfo *baseline_info;
S390CPUModel modela, modelb, model;
uint16_t cpu_type;
uint8_t max_gen_ga;
uint8_t max_gen;
/* convert both models to our internal representation */
cpu_model_from_info(&modela, infoa, errp);
if (*errp) {
return NULL;
}
cpu_model_from_info(&modelb, infob, errp);
if (*errp) {
return NULL;
}
/* features both models support */
bitmap_and(model.features, modela.features, modelb.features, S390_FEAT_MAX);
/* detect the maximum model not regarding features */
if (modela.def->gen == modelb.def->gen) {
if (modela.def->type == modelb.def->type) {
cpu_type = modela.def->type;
} else {
cpu_type = 0;
}
max_gen = modela.def->gen;
max_gen_ga = MIN(modela.def->ec_ga, modelb.def->ec_ga);
} else if (modela.def->gen > modelb.def->gen) {
cpu_type = modelb.def->type;
max_gen = modelb.def->gen;
max_gen_ga = modelb.def->ec_ga;
} else {
cpu_type = modela.def->type;
max_gen = modela.def->gen;
max_gen_ga = modela.def->ec_ga;
}
model.def = s390_find_cpu_def(cpu_type, max_gen, max_gen_ga,
model.features);
/* strip off features not part of the max model */
bitmap_and(model.features, model.features, model.def->full_feat,
S390_FEAT_MAX);
baseline_info = g_malloc0(sizeof(*baseline_info));
baseline_info->model = g_malloc0(sizeof(*baseline_info->model));
cpu_info_from_model(baseline_info->model, &model, true);
return baseline_info;
}
#endif
static void check_consistency(const S390CPUModel *model)
{
static int dep[][2] = {
{ S390_FEAT_IPTE_RANGE, S390_FEAT_DAT_ENH },
{ S390_FEAT_IDTE_SEGMENT, S390_FEAT_DAT_ENH },
{ S390_FEAT_IDTE_REGION, S390_FEAT_DAT_ENH },
{ S390_FEAT_IDTE_REGION, S390_FEAT_IDTE_SEGMENT },
{ S390_FEAT_LOCAL_TLB_CLEARING, S390_FEAT_DAT_ENH},
{ S390_FEAT_LONG_DISPLACEMENT_FAST, S390_FEAT_LONG_DISPLACEMENT },
{ S390_FEAT_DFP_FAST, S390_FEAT_DFP },
{ S390_FEAT_TRANSACTIONAL_EXE, S390_FEAT_STFLE_49 },
{ S390_FEAT_EDAT_2, S390_FEAT_EDAT},
{ S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512 },
{ S390_FEAT_MSA_EXT_5, S390_FEAT_KLMD_SHA_512 },
{ S390_FEAT_MSA_EXT_4, S390_FEAT_MSA_EXT_3 },
{ S390_FEAT_SIE_CMMA, S390_FEAT_CMM },
{ S390_FEAT_SIE_CMMA, S390_FEAT_SIE_GSLS },
{ S390_FEAT_SIE_PFMFI, S390_FEAT_EDAT },
};
int i;
for (i = 0; i < ARRAY_SIZE(dep); i++) {
if (test_bit(dep[i][0], model->features) &&
!test_bit(dep[i][1], model->features)) {
error_report("Warning: \'%s\' requires \'%s\'.",
s390_feat_def(dep[i][0])->name,
s390_feat_def(dep[i][1])->name);
}
}
}
static void error_prepend_missing_feat(const char *name, void *opaque)
{
error_prepend((Error **) opaque, "%s ", name);
}
static void check_compatibility(const S390CPUModel *max_model,
const S390CPUModel *model, Error **errp)
{
S390FeatBitmap missing;
if (model->def->gen > max_model->def->gen) {
error_setg(errp, "Selected CPU generation is too new. Maximum "
"supported model in the configuration: \'%s\'",
max_model->def->name);
return;
} else if (model->def->gen == max_model->def->gen &&
model->def->ec_ga > max_model->def->ec_ga) {
error_setg(errp, "Selected CPU GA level is too new. Maximum "
"supported model in the configuration: \'%s\'",
max_model->def->name);
return;
}
/* detect the missing features to properly report them */
bitmap_andnot(missing, model->features, max_model->features, S390_FEAT_MAX);
if (bitmap_empty(missing, S390_FEAT_MAX)) {
return;
}
error_setg(errp, " ");
s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat);
error_prepend(errp, "Some features requested in the CPU model are not "
"available in the configuration: ");
}
static S390CPUModel *get_max_cpu_model(Error **errp)
{
#ifndef CONFIG_USER_ONLY
static S390CPUModel max_model;
static bool cached;
if (cached) {
return &max_model;
}
if (kvm_enabled()) {
kvm_s390_get_host_cpu_model(&max_model, errp);
} else {
/* TCG enulates a z900 */
max_model.def = &s390_cpu_defs[0];
bitmap_copy(max_model.features, max_model.def->default_feat,
S390_FEAT_MAX);
}
if (!*errp) {
cached = true;
return &max_model;
}
#endif
return NULL;
}
static inline void apply_cpu_model(const S390CPUModel *model, Error **errp)
{
#ifndef CONFIG_USER_ONLY
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;
}
if (kvm_enabled()) {
kvm_s390_apply_cpu_model(model, errp);
} else if (model) {
/* FIXME TCG - use data for stdip/stfl */
}
if (!*errp) {
applied = true;
if (model) {
applied_model = *model;
}
}
#endif
}
void s390_realize_cpu_model(CPUState *cs, Error **errp)
{
S390CPUClass *xcc = S390_CPU_GET_CLASS(cs);
S390CPU *cpu = S390_CPU(cs);
const S390CPUModel *max_model;
if (xcc->kvm_required && !kvm_enabled()) {
error_setg(errp, "CPU definition requires KVM");
return;
}
if (!cpu->model) {
/* no host model support -> perform compatibility stuff */
apply_cpu_model(NULL, errp);
return;
}
max_model = get_max_cpu_model(errp);
if (*errp) {
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_ver = max_model->cpu_ver;
check_consistency(cpu->model);
check_compatibility(max_model, cpu->model, errp);
if (*errp) {
return;
}
apply_cpu_model(cpu->model, errp);
}
static void get_feature(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
S390Feat feat = (S390Feat) opaque;
S390CPU *cpu = S390_CPU(obj);
bool value;
if (!cpu->model) {
error_setg(errp, "Details about the host CPU model are not available, "
"features cannot be queried.");
return;
}
value = test_bit(feat, cpu->model->features);
visit_type_bool(v, name, &value, errp);
}
static void set_feature(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
S390Feat feat = (S390Feat) opaque;
DeviceState *dev = DEVICE(obj);
S390CPU *cpu = S390_CPU(obj);
bool value;
if (dev->realized) {
error_setg(errp, "Attempt to set property '%s' on '%s' after "
"it was realized", name, object_get_typename(obj));
return;
} else if (!cpu->model) {
error_setg(errp, "Details about the host CPU model are not available, "
"features cannot be changed.");
return;
}
visit_type_bool(v, name, &value, errp);
if (*errp) {
return;
}
if (value) {
if (!test_bit(feat, cpu->model->def->full_feat)) {
error_setg(errp, "Feature '%s' is not available for CPU model '%s',"
" it was introduced with later models.",
name, cpu->model->def->name);
return;
}
set_bit(feat, cpu->model->features);
} else {
clear_bit(feat, cpu->model->features);
}
}
static void get_feature_group(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
S390FeatGroup group = (S390FeatGroup) opaque;
const S390FeatGroupDef *def = s390_feat_group_def(group);
S390CPU *cpu = S390_CPU(obj);
S390FeatBitmap tmp;
bool value;
if (!cpu->model) {
error_setg(errp, "Details about the host CPU model are not available, "
"features cannot be queried.");
return;
}
/* a group is enabled if all features are enabled */
bitmap_and(tmp, cpu->model->features, def->feat, S390_FEAT_MAX);
value = bitmap_equal(tmp, def->feat, S390_FEAT_MAX);
visit_type_bool(v, name, &value, errp);
}
static void set_feature_group(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
S390FeatGroup group = (S390FeatGroup) opaque;
const S390FeatGroupDef *def = s390_feat_group_def(group);
DeviceState *dev = DEVICE(obj);
S390CPU *cpu = S390_CPU(obj);
bool value;
if (dev->realized) {
error_setg(errp, "Attempt to set property '%s' on '%s' after "
"it was realized", name, object_get_typename(obj));
return;
} else if (!cpu->model) {
error_setg(errp, "Details about the host CPU model are not available, "
"features cannot be changed.");
return;
}
visit_type_bool(v, name, &value, errp);
if (*errp) {
return;
}
if (value) {
/* groups are added in one shot, so an intersect is sufficient */
if (!bitmap_intersects(def->feat, cpu->model->def->full_feat,
S390_FEAT_MAX)) {
error_setg(errp, "Group '%s' is not available for CPU model '%s',"
" it was introduced with later models.",
name, cpu->model->def->name);
return;
}
bitmap_or(cpu->model->features, cpu->model->features, def->feat,
S390_FEAT_MAX);
} else {
bitmap_andnot(cpu->model->features, cpu->model->features, def->feat,
S390_FEAT_MAX);
}
}
void s390_cpu_model_register_props(Object *obj)
{
S390FeatGroup group;
S390Feat feat;
for (feat = 0; feat < S390_FEAT_MAX; feat++) {
const S390FeatDef *def = s390_feat_def(feat);
object_property_add(obj, def->name, "bool", get_feature,
set_feature, NULL, (void *) feat, NULL);
object_property_set_description(obj, def->name, def->desc , NULL);
}
for (group = 0; group < S390_FEAT_GROUP_MAX; group++) {
const S390FeatGroupDef *def = s390_feat_group_def(group);
object_property_add(obj, def->name, "bool", get_feature_group,
set_feature_group, NULL, (void *) group, NULL);
object_property_set_description(obj, def->name, def->desc , NULL);
}
}
static void s390_cpu_model_initfn(Object *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);
}
}
#ifdef CONFIG_KVM
static void s390_host_cpu_model_initfn(Object *obj)
{
S390CPU *cpu = S390_CPU(obj);
Error *err = NULL;
if (!kvm_enabled() || !kvm_s390_cpu_models_supported()) {
return;
}
cpu->model = g_malloc0(sizeof(*cpu->model));
kvm_s390_get_host_cpu_model(cpu->model, &err);
if (err) {
error_report_err(err);
g_free(cpu->model);
/* fallback to unsupported cpu models */
cpu->model = NULL;
}
}
#endif
static void s390_qemu_cpu_model_initfn(Object *obj)
{
S390CPU *cpu = S390_CPU(obj);
cpu->model = g_malloc0(sizeof(*cpu->model));
/* TCG emulates a z900 */
cpu->model->def = &s390_cpu_defs[0];
bitmap_copy(cpu->model->features, cpu->model->def->default_feat,
S390_FEAT_MAX);
}
static void s390_cpu_model_finalize(Object *obj)
{
S390CPU *cpu = S390_CPU(obj);
g_free(cpu->model);
cpu->model = NULL;
}
static bool get_is_migration_safe(Object *obj, Error **errp)
{
return S390_CPU_GET_CLASS(obj)->is_migration_safe;
}
static bool get_is_static(Object *obj, Error **errp)
{
return S390_CPU_GET_CLASS(obj)->is_static;
}
static char *get_description(Object *obj, Error **errp)
{
return g_strdup(S390_CPU_GET_CLASS(obj)->desc);
}
void s390_cpu_model_class_register_props(ObjectClass *oc)
{
object_class_property_add_bool(oc, "migration-safe", get_is_migration_safe,
NULL, NULL);
object_class_property_add_bool(oc, "static", get_is_static,
NULL, NULL);
object_class_property_add_str(oc, "description", get_description, NULL,
NULL);
}
#ifdef CONFIG_KVM
static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data)
{
S390CPUClass *xcc = S390_CPU_CLASS(oc);
xcc->kvm_required = true;
xcc->desc = "KVM only: All recognized features";
}
#endif
static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data)
{
S390CPUClass *xcc = S390_CPU_CLASS(oc);
/* all base models are migration safe */
xcc->cpu_def = (const S390CPUDef *) data;
xcc->is_migration_safe = true;
xcc->is_static = true;
xcc->desc = xcc->cpu_def->desc;
}
static void s390_cpu_model_class_init(ObjectClass *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(ObjectClass *oc, void *data)
{
S390CPUClass *xcc = S390_CPU_CLASS(oc);
xcc->is_migration_safe = true;
xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s",
qemu_hw_version());
}
#define S390_CPU_TYPE_SUFFIX "-" TYPE_S390_CPU
#define S390_CPU_TYPE_NAME(name) (name S390_CPU_TYPE_SUFFIX)
/* Generate type name for a cpu model. Caller has to free the string. */
static char *s390_cpu_type_name(const char *model_name)
{
return g_strdup_printf(S390_CPU_TYPE_NAME("%s"), model_name);
}
/* Generate type name for a base cpu model. Caller has to free the string. */
static char *s390_base_cpu_type_name(const char *model_name)
{
return g_strdup_printf(S390_CPU_TYPE_NAME("%s-base"), model_name);
}
ObjectClass *s390_cpu_class_by_name(const char *name)
{
char *typename = s390_cpu_type_name(name);
ObjectClass *oc;
oc = object_class_by_name(typename);
g_free(typename);
return oc;
}
static const TypeInfo qemu_s390_cpu_type_info = {
.name = S390_CPU_TYPE_NAME("qemu"),
.parent = TYPE_S390_CPU,
.instance_init = s390_qemu_cpu_model_initfn,
.instance_finalize = s390_cpu_model_finalize,
.class_init = s390_qemu_cpu_model_class_init,
};
#ifdef CONFIG_KVM
static const TypeInfo host_s390_cpu_type_info = {
.name = S390_CPU_TYPE_NAME("host"),
.parent = TYPE_S390_CPU,
.instance_init = s390_host_cpu_model_initfn,
.instance_finalize = s390_cpu_model_finalize,
.class_init = s390_host_cpu_model_class_init,
};
#endif
static void register_types(void)
{
int i;
/* init all bitmaps from gnerated data initially */
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);
}
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
char *base_name = s390_base_cpu_type_name(s390_cpu_defs[i].name);
TypeInfo ti_base = {
.name = base_name,
.parent = TYPE_S390_CPU,
.instance_init = s390_cpu_model_initfn,
.instance_finalize = s390_cpu_model_finalize,
.class_init = s390_base_cpu_model_class_init,
.class_data = (void *) &s390_cpu_defs[i],
};
char *name = s390_cpu_type_name(s390_cpu_defs[i].name);
TypeInfo ti = {
.name = name,
.parent = TYPE_S390_CPU,
.instance_init = s390_cpu_model_initfn,
.instance_finalize = s390_cpu_model_finalize,
.class_init = s390_cpu_model_class_init,
.class_data = (void *) &s390_cpu_defs[i],
};
type_register_static(&ti_base);
type_register_static(&ti);
g_free(base_name);
g_free(name);
}
type_register_static(&qemu_s390_cpu_type_info);
#ifdef CONFIG_KVM
type_register_static(&host_s390_cpu_type_info);
#endif
}
type_init(register_types)
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