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sparc: make cpu feature parsing property based 

with features converted to properties we can use the same
approach as x86 for features parsing and drop legacy
approach that manipulated CPU instance directly.
New sparc_cpu_parse_features() will allow only +-feat
and explicitly disable feat=on|off syntax for now.

With that in place and sparc_cpu_parse_features() providing
generic CPUClass::parse_features callback, the cpu_sparc_init()
will do the same job as cpu_generic_init() so replace content
of cpu_sparc_init() with it.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <1503672460-109436-1-git-send-email-imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Igor Mammedov 2017-08-25 16:47:40 +02:00 committed by Eduardo Habkost
parent 700549620b
commit d1853231c6
1 changed files with 86 additions and 137 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

223
target/sparc/cpu.c
View File

@ -104,50 +104,99 @@ static void cpu_sparc_disas_set_info(CPUState *cpu, disassemble_info *info)
#endif
}
static void sparc_cpu_parse_features(CPUState *cs, char *features,
Error **errp);
static int cpu_sparc_register(SPARCCPU *cpu, const char *cpu_model)
static void
cpu_add_feat_as_prop(const char *typename, const char *name, const char *val)
{
char *s = g_strdup(cpu_model);
char *featurestr = strtok(s, ",");
Error *err = NULL;
GlobalProperty *prop = g_new0(typeof(*prop), 1);
prop->driver = typename;
prop->property = g_strdup(name);
prop->value = g_strdup(val);
prop->errp = &error_fatal;
qdev_prop_register_global(prop);
}
featurestr = strtok(NULL, ",");
sparc_cpu_parse_features(CPU(cpu), featurestr, &err);
g_free(s);
if (err) {
error_report_err(err);
return -1;
/* Parse "+feature,-feature,feature=foo" CPU feature string */
static void sparc_cpu_parse_features(const char *typename, char *features,
Error **errp)
{
GList *l, *plus_features = NULL, *minus_features = NULL;
char *featurestr; /* Single 'key=value" string being parsed */
static bool cpu_globals_initialized;
if (cpu_globals_initialized) {
return;
}
cpu_globals_initialized = true;
if (!features) {
return;
}
return 0;
for (featurestr = strtok(features, ",");
featurestr;
featurestr = strtok(NULL, ",")) {
const char *name;
const char *val = NULL;
char *eq = NULL;
/* Compatibility syntax: */
if (featurestr[0] == '+') {
plus_features = g_list_append(plus_features,
g_strdup(featurestr + 1));
continue;
} else if (featurestr[0] == '-') {
minus_features = g_list_append(minus_features,
g_strdup(featurestr + 1));
continue;
}
eq = strchr(featurestr, '=');
name = featurestr;
if (eq) {
*eq++ = 0;
val = eq;
/*
* Temporarily, only +feat/-feat will be supported
* for boolean properties until we remove the
* minus-overrides-plus semantics and just follow
* the order options appear on the command-line.
*
* TODO: warn if user is relying on minus-override-plus semantics
* TODO: remove minus-override-plus semantics after
* warning for a few releases
*/
if (!strcasecmp(val, "on") ||
!strcasecmp(val, "off") ||
!strcasecmp(val, "true") ||
!strcasecmp(val, "false")) {
error_setg(errp, "Boolean properties in format %s=%s"
" are not supported", name, val);
return;
}
} else {
error_setg(errp, "Unsupported property format: %s", name);
return;
}
cpu_add_feat_as_prop(typename, name, val);
}
for (l = plus_features; l; l = l->next) {
const char *name = l->data;
cpu_add_feat_as_prop(typename, name, "on");
}
g_list_free_full(plus_features, g_free);
for (l = minus_features; l; l = l->next) {
const char *name = l->data;
cpu_add_feat_as_prop(typename, name, "off");
}
g_list_free_full(minus_features, g_free);
}
SPARCCPU *cpu_sparc_init(const char *cpu_model)
{
SPARCCPU *cpu;
ObjectClass *oc;
char *str, *name;
str = g_strdup(cpu_model);
name = strtok(str, ",");
oc = cpu_class_by_name(TYPE_SPARC_CPU, name);
g_free(str);
if (oc == NULL) {
return NULL;
}
cpu = SPARC_CPU(object_new(object_class_get_name(oc)));
if (cpu_sparc_register(cpu, cpu_model) < 0) {
object_unref(OBJECT(cpu));
return NULL;
}
object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
return cpu;
return SPARC_CPU(cpu_generic_init(TYPE_SPARC_CPU, cpu_model));
}
void cpu_sparc_set_id(CPUSPARCState *env, unsigned int cpu)
@ -528,107 +577,6 @@ static void print_features(FILE *f, fprintf_function cpu_fprintf,
}
}
static void add_flagname_to_bitmaps(const char *flagname, uint32_t *features)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(feature_name); i++) {
if (feature_name[i] && !strcmp(flagname, feature_name[i])) {
*features |= 1 << i;
return;
}
}
error_report("CPU feature %s not found", flagname);
}
static void sparc_cpu_parse_features(CPUState *cs, char *features,
Error **errp)
{
SPARCCPU *cpu = SPARC_CPU(cs);
sparc_def_t *cpu_def = &cpu->env.def;
char *featurestr;
uint32_t plus_features = 0;
uint32_t minus_features = 0;
uint64_t iu_version;
uint32_t fpu_version, mmu_version, nwindows;
featurestr = features ? strtok(features, ",") : NULL;
while (featurestr) {
char *val;
if (featurestr[0] == '+') {
add_flagname_to_bitmaps(featurestr + 1, &plus_features);
} else if (featurestr[0] == '-') {
add_flagname_to_bitmaps(featurestr + 1, &minus_features);
} else if ((val = strchr(featurestr, '='))) {
*val = 0; val++;
if (!strcmp(featurestr, "iu_version")) {
char *err;
iu_version = strtoll(val, &err, 0);
if (!*val || *err) {
error_setg(errp, "bad numerical value %s", val);
return;
}
cpu_def->iu_version = iu_version;
#ifdef DEBUG_FEATURES
fprintf(stderr, "iu_version %" PRIx64 "\n", iu_version);
#endif
} else if (!strcmp(featurestr, "fpu_version")) {
char *err;
fpu_version = strtol(val, &err, 0);
if (!*val || *err) {
error_setg(errp, "bad numerical value %s", val);
return;
}
cpu_def->fpu_version = fpu_version;
#ifdef DEBUG_FEATURES
fprintf(stderr, "fpu_version %x\n", fpu_version);
#endif
} else if (!strcmp(featurestr, "mmu_version")) {
char *err;
mmu_version = strtol(val, &err, 0);
if (!*val || *err) {
error_setg(errp, "bad numerical value %s", val);
return;
}
cpu_def->mmu_version = mmu_version;
#ifdef DEBUG_FEATURES
fprintf(stderr, "mmu_version %x\n", mmu_version);
#endif
} else if (!strcmp(featurestr, "nwindows")) {
char *err;
nwindows = strtol(val, &err, 0);
if (!*val || *err || nwindows > MAX_NWINDOWS ||
nwindows < MIN_NWINDOWS) {
error_setg(errp, "bad numerical value %s", val);
return;
}
cpu_def->nwindows = nwindows;
#ifdef DEBUG_FEATURES
fprintf(stderr, "nwindows %d\n", nwindows);
#endif
} else {
error_setg(errp, "unrecognized feature %s", featurestr);
return;
}
} else {
error_setg(errp, "feature string `%s' not in format "
"(+feature|-feature|feature=xyz)", featurestr);
return;
}
featurestr = strtok(NULL, ",");
}
cpu_def->features |= plus_features;
cpu_def->features &= ~minus_features;
#ifdef DEBUG_FEATURES
print_features(stderr, fprintf, cpu_def->features, NULL);
#endif
}
void sparc_cpu_list(FILE *f, fprintf_function cpu_fprintf)
{
unsigned int i;
@ -931,6 +879,7 @@ static void sparc_cpu_class_init(ObjectClass *oc, void *data)
cc->reset = sparc_cpu_reset;
cc->class_by_name = sparc_cpu_class_by_name;
cc->parse_features = sparc_cpu_parse_features;
cc->has_work = sparc_cpu_has_work;
cc->do_interrupt = sparc_cpu_do_interrupt;
cc->cpu_exec_interrupt = sparc_cpu_exec_interrupt;