target/i386/cpu-sysemu.c - qemu - Git at Google

 /*
  *  i386 CPUID, CPU class, definitions, models: sysemu-only code
  *
  *  Copyright (c) 2003 Fabrice Bellard
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */

 #include "qemu/osdep.h"
 #include "cpu.h"
 #include "sysemu/kvm.h"
 #include "sysemu/xen.h"
 #include "sysemu/whpx.h"
 #include "qapi/error.h"
 #include "qapi/qapi-visit-run-state.h"
 #include "qapi/qmp/qdict.h"
 #include "qom/qom-qobject.h"
 #include "qapi/qapi-commands-machine-target.h"
 #include "hw/qdev-properties.h"

 #include "exec/address-spaces.h"
 #include "hw/i386/apic_internal.h"

 #include "cpu-internal.h"

 /* Return a QDict containing keys for all properties that can be included
  * in static expansion of CPU models. All properties set by x86_cpu_load_model()
  * must be included in the dictionary.
  */
 static QDict *x86_cpu_static_props(void)
 {
     FeatureWord w;
     int i;
     static const char *props[] = {
         "min-level",
         "min-xlevel",
         "family",
         "model",
         "stepping",
         "model-id",
         "vendor",
         "lmce",
         NULL,
     };
     static QDict *d;

     if (d) {
         return d;
     }

     d = qdict_new();
     for (i = 0; props[i]; i++) {
         qdict_put_null(d, props[i]);
     }

     for (w = 0; w < FEATURE_WORDS; w++) {
         FeatureWordInfo *fi = &feature_word_info[w];
         int bit;
         for (bit = 0; bit < 64; bit++) {
             if (!fi->feat_names[bit]) {
                 continue;
             }
             qdict_put_null(d, fi->feat_names[bit]);
         }
     }

     return d;
 }

 /* Add an entry to @props dict, with the value for property. */
 static void x86_cpu_expand_prop(X86CPU *cpu, QDict *props, const char *prop)
 {
     QObject *value = object_property_get_qobject(OBJECT(cpu), prop,
                                                  &error_abort);

     qdict_put_obj(props, prop, value);
 }

 /* Convert CPU model data from X86CPU object to a property dictionary
  * that can recreate exactly the same CPU model.
  */
 static void x86_cpu_to_dict(X86CPU *cpu, QDict *props)
 {
     QDict *sprops = x86_cpu_static_props();
     const QDictEntry *e;

     for (e = qdict_first(sprops); e; e = qdict_next(sprops, e)) {
         const char *prop = qdict_entry_key(e);
         x86_cpu_expand_prop(cpu, props, prop);
     }
 }

 /* Convert CPU model data from X86CPU object to a property dictionary
  * that can recreate exactly the same CPU model, including every
  * writable QOM property.
  */
 static void x86_cpu_to_dict_full(X86CPU *cpu, QDict *props)
 {
     ObjectPropertyIterator iter;
     ObjectProperty *prop;

     object_property_iter_init(&iter, OBJECT(cpu));
     while ((prop = object_property_iter_next(&iter))) {
         /* skip read-only or write-only properties */
         if (!prop->get || !prop->set) {
             continue;
         }

         /* "hotplugged" is the only property that is configurable
          * on the command-line but will be set differently on CPUs
          * created using "-cpu ... -smp ..." and by CPUs created
          * on the fly by x86_cpu_from_model() for querying. Skip it.
          */
         if (!strcmp(prop->name, "hotplugged")) {
             continue;
         }
         x86_cpu_expand_prop(cpu, props, prop->name);
     }
 }

 static void object_apply_props(Object *obj, QDict *props, Error **errp)
 {
     const QDictEntry *prop;

     for (prop = qdict_first(props); prop; prop = qdict_next(props, prop)) {
         if (!object_property_set_qobject(obj, qdict_entry_key(prop),
                                          qdict_entry_value(prop), errp)) {
             break;
         }
     }
 }

 /* Create X86CPU object according to model+props specification */
 static X86CPU *x86_cpu_from_model(const char *model, QDict *props, Error **errp)
 {
     X86CPU *xc = NULL;
     X86CPUClass *xcc;
     Error *err = NULL;

     xcc = X86_CPU_CLASS(cpu_class_by_name(TYPE_X86_CPU, model));
     if (xcc == NULL) {
         error_setg(&err, "CPU model '%s' not found", model);
         goto out;
     }

     xc = X86_CPU(object_new_with_class(OBJECT_CLASS(xcc)));
     if (props) {
         object_apply_props(OBJECT(xc), props, &err);
         if (err) {
             goto out;
         }
     }

     x86_cpu_expand_features(xc, &err);
     if (err) {
         goto out;
     }

 out:
     if (err) {
         error_propagate(errp, err);
         object_unref(OBJECT(xc));
         xc = NULL;
     }
     return xc;
 }

 CpuModelExpansionInfo *
 qmp_query_cpu_model_expansion(CpuModelExpansionType type,
                                                       CpuModelInfo *model,
                                                       Error **errp)
 {
     X86CPU *xc = NULL;
     Error *err = NULL;
     CpuModelExpansionInfo *ret = g_new0(CpuModelExpansionInfo, 1);
     QDict *props = NULL;
     const char *base_name;

     xc = x86_cpu_from_model(model->name, qobject_to(QDict, model->props),
                             &err);
     if (err) {
         goto out;
     }

     props = qdict_new();
     ret->model = g_new0(CpuModelInfo, 1);
     ret->model->props = QOBJECT(props);

     switch (type) {
     case CPU_MODEL_EXPANSION_TYPE_STATIC:
         /* Static expansion will be based on "base" only */
         base_name = "base";
         x86_cpu_to_dict(xc, props);
     break;
     case CPU_MODEL_EXPANSION_TYPE_FULL:
         /* As we don't return every single property, full expansion needs
          * to keep the original model name+props, and add extra
          * properties on top of that.
          */
         base_name = model->name;
         x86_cpu_to_dict_full(xc, props);
     break;
     default:
         error_setg(&err, "Unsupported expansion type");
         goto out;
     }

     x86_cpu_to_dict(xc, props);

     ret->model->name = g_strdup(base_name);

 out:
     object_unref(OBJECT(xc));
     if (err) {
         error_propagate(errp, err);
         qapi_free_CpuModelExpansionInfo(ret);
         ret = NULL;
     }
     return ret;
 }

 void cpu_clear_apic_feature(CPUX86State *env)
 {
     env->features[FEAT_1_EDX] &= ~CPUID_APIC;
 }

 bool cpu_is_bsp(X86CPU *cpu)
 {
     return cpu_get_apic_base(cpu->apic_state) & MSR_IA32_APICBASE_BSP;
 }

 /* TODO: remove me, when reset over QOM tree is implemented */
 void x86_cpu_machine_reset_cb(void *opaque)
 {
     X86CPU *cpu = opaque;
     cpu_reset(CPU(cpu));
 }

 APICCommonClass *apic_get_class(Error **errp)
 {
     const char *apic_type = "apic";

     /* TODO: in-kernel irqchip for hvf */
     if (kvm_enabled()) {
         if (!kvm_irqchip_in_kernel()) {
             error_setg(errp, "KVM does not support userspace APIC");
             return NULL;
         }
         apic_type = "kvm-apic";
     } else if (xen_enabled()) {
         apic_type = "xen-apic";
     } else if (whpx_apic_in_platform()) {
         apic_type = "whpx-apic";
     }

     return APIC_COMMON_CLASS(object_class_by_name(apic_type));
 }

 void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
 {
     APICCommonState *apic;
     APICCommonClass *apic_class = apic_get_class(errp);

     if (!apic_class) {
         return;
     }

     cpu->apic_state = DEVICE(object_new_with_class(OBJECT_CLASS(apic_class)));
     object_property_add_child(OBJECT(cpu), "lapic",
                               OBJECT(cpu->apic_state));
     object_unref(OBJECT(cpu->apic_state));

     qdev_prop_set_uint32(cpu->apic_state, "id", cpu->apic_id);
     /* TODO: convert to link<> */
     apic = APIC_COMMON(cpu->apic_state);
     apic->cpu = cpu;
     apic->apicbase = APIC_DEFAULT_ADDRESS | MSR_IA32_APICBASE_ENABLE;
 }

 void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
 {
     APICCommonState *apic;
     static bool apic_mmio_map_once;

     if (cpu->apic_state == NULL) {
         return;
     }
     qdev_realize(DEVICE(cpu->apic_state), NULL, errp);

     /* Map APIC MMIO area */
     apic = APIC_COMMON(cpu->apic_state);
     if (!apic_mmio_map_once) {
         memory_region_add_subregion_overlap(get_system_memory(),
                                             apic->apicbase &
                                             MSR_IA32_APICBASE_BASE,
                                             &apic->io_memory,
                                             0x1000);
         apic_mmio_map_once = true;
      }
 }

 GuestPanicInformation *x86_cpu_get_crash_info(CPUState *cs)
 {
     X86CPU *cpu = X86_CPU(cs);
     CPUX86State *env = &cpu->env;
     GuestPanicInformation *panic_info = NULL;

     if (hyperv_feat_enabled(cpu, HYPERV_FEAT_CRASH)) {
         panic_info = g_new0(GuestPanicInformation, 1);

         panic_info->type = GUEST_PANIC_INFORMATION_TYPE_HYPER_V;

         assert(HV_CRASH_PARAMS >= 5);
         panic_info->u.hyper_v.arg1 = env->msr_hv_crash_params[0];
         panic_info->u.hyper_v.arg2 = env->msr_hv_crash_params[1];
         panic_info->u.hyper_v.arg3 = env->msr_hv_crash_params[2];
         panic_info->u.hyper_v.arg4 = env->msr_hv_crash_params[3];
         panic_info->u.hyper_v.arg5 = env->msr_hv_crash_params[4];
     }

     return panic_info;
 }
 void x86_cpu_get_crash_info_qom(Object *obj, Visitor *v,
                                 const char *name, void *opaque,
                                 Error **errp)
 {
     CPUState *cs = CPU(obj);
     GuestPanicInformation *panic_info;

     if (!cs->crash_occurred) {
         error_setg(errp, "No crash occurred");
         return;
     }

     panic_info = x86_cpu_get_crash_info(cs);
     if (panic_info == NULL) {
         error_setg(errp, "No crash information");
         return;
     }

     visit_type_GuestPanicInformation(v, "crash-information", &panic_info,
                                      errp);
     qapi_free_GuestPanicInformation(panic_info);
 }
	/*
	* i386 CPUID, CPU class, definitions, models: sysemu-only code
	*
	* Copyright (c) 2003 Fabrice Bellard
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	*/

	#include "qemu/osdep.h"
	#include "cpu.h"
	#include "sysemu/kvm.h"
	#include "sysemu/xen.h"
	#include "sysemu/whpx.h"
	#include "qapi/error.h"
	#include "qapi/qapi-visit-run-state.h"
	#include "qapi/qmp/qdict.h"
	#include "qom/qom-qobject.h"
	#include "qapi/qapi-commands-machine-target.h"
	#include "hw/qdev-properties.h"

	#include "exec/address-spaces.h"
	#include "hw/i386/apic_internal.h"

	#include "cpu-internal.h"

	/* Return a QDict containing keys for all properties that can be included
	* in static expansion of CPU models. All properties set by x86_cpu_load_model()
	* must be included in the dictionary.
	*/
	static QDict *x86_cpu_static_props(void)
	{
	FeatureWord w;
	int i;
	static const char *props[] = {
	"min-level",
	"min-xlevel",
	"family",
	"model",
	"stepping",
	"model-id",
	"vendor",
	"lmce",
	NULL,
	};
	static QDict *d;

	if (d) {
	return d;
	}

	d = qdict_new();
	for (i = 0; props[i]; i++) {
	qdict_put_null(d, props[i]);
	}

	for (w = 0; w < FEATURE_WORDS; w++) {
	FeatureWordInfo *fi = &feature_word_info[w];
	int bit;
	for (bit = 0; bit < 64; bit++) {
	if (!fi->feat_names[bit]) {
	continue;
	}
	qdict_put_null(d, fi->feat_names[bit]);
	}
	}

	return d;
	}

	/* Add an entry to @props dict, with the value for property. */
	static void x86_cpu_expand_prop(X86CPU cpu, QDict props, const char *prop)
	{
	QObject *value = object_property_get_qobject(OBJECT(cpu), prop,
	&error_abort);

	qdict_put_obj(props, prop, value);
	}

	/* Convert CPU model data from X86CPU object to a property dictionary
	* that can recreate exactly the same CPU model.
	*/
	static void x86_cpu_to_dict(X86CPU cpu, QDict props)
	{
	QDict *sprops = x86_cpu_static_props();
	const QDictEntry *e;

	for (e = qdict_first(sprops); e; e = qdict_next(sprops, e)) {
	const char *prop = qdict_entry_key(e);
	x86_cpu_expand_prop(cpu, props, prop);
	}
	}

	/* Convert CPU model data from X86CPU object to a property dictionary
	* that can recreate exactly the same CPU model, including every
	* writable QOM property.
	*/
	static void x86_cpu_to_dict_full(X86CPU cpu, QDict props)
	{
	ObjectPropertyIterator iter;
	ObjectProperty *prop;

	object_property_iter_init(&iter, OBJECT(cpu));
	while ((prop = object_property_iter_next(&iter))) {
	/* skip read-only or write-only properties */
	if (!prop->get \|\| !prop->set) {
	continue;
	}

	/* "hotplugged" is the only property that is configurable
	* on the command-line but will be set differently on CPUs
	* created using "-cpu ... -smp ..." and by CPUs created
	* on the fly by x86_cpu_from_model() for querying. Skip it.
	*/
	if (!strcmp(prop->name, "hotplugged")) {
	continue;
	}
	x86_cpu_expand_prop(cpu, props, prop->name);
	}
	}

	static void object_apply_props(Object obj, QDict props, Error **errp)
	{
	const QDictEntry *prop;

	for (prop = qdict_first(props); prop; prop = qdict_next(props, prop)) {
	if (!object_property_set_qobject(obj, qdict_entry_key(prop),
	qdict_entry_value(prop), errp)) {
	break;
	}
	}
	}

	/* Create X86CPU object according to model+props specification */
	static X86CPU x86_cpu_from_model(const char model, QDict props, Error *errp)
	{
	X86CPU *xc = NULL;
	X86CPUClass *xcc;
	Error *err = NULL;

	xcc = X86_CPU_CLASS(cpu_class_by_name(TYPE_X86_CPU, model));
	if (xcc == NULL) {
	error_setg(&err, "CPU model '%s' not found", model);
	goto out;
	}

	xc = X86_CPU(object_new_with_class(OBJECT_CLASS(xcc)));
	if (props) {
	object_apply_props(OBJECT(xc), props, &err);
	if (err) {
	goto out;
	}
	}

	x86_cpu_expand_features(xc, &err);
	if (err) {
	goto out;
	}

	out:
	if (err) {
	error_propagate(errp, err);
	object_unref(OBJECT(xc));
	xc = NULL;
	}
	return xc;
	}

	CpuModelExpansionInfo *
	qmp_query_cpu_model_expansion(CpuModelExpansionType type,
	CpuModelInfo *model,
	Error **errp)
	{
	X86CPU *xc = NULL;
	Error *err = NULL;
	CpuModelExpansionInfo *ret = g_new0(CpuModelExpansionInfo, 1);
	QDict *props = NULL;
	const char *base_name;

	xc = x86_cpu_from_model(model->name, qobject_to(QDict, model->props),
	&err);
	if (err) {
	goto out;
	}

	props = qdict_new();
	ret->model = g_new0(CpuModelInfo, 1);
	ret->model->props = QOBJECT(props);

	switch (type) {
	case CPU_MODEL_EXPANSION_TYPE_STATIC:
	/* Static expansion will be based on "base" only */
	base_name = "base";
	x86_cpu_to_dict(xc, props);
	break;
	case CPU_MODEL_EXPANSION_TYPE_FULL:
	/* As we don't return every single property, full expansion needs
	* to keep the original model name+props, and add extra
	* properties on top of that.
	*/
	base_name = model->name;
	x86_cpu_to_dict_full(xc, props);
	break;
	default:
	error_setg(&err, "Unsupported expansion type");
	goto out;
	}

	x86_cpu_to_dict(xc, props);

	ret->model->name = g_strdup(base_name);

	out:
	object_unref(OBJECT(xc));
	if (err) {
	error_propagate(errp, err);
	qapi_free_CpuModelExpansionInfo(ret);
	ret = NULL;
	}
	return ret;
	}

	void cpu_clear_apic_feature(CPUX86State *env)
	{
	env->features[FEAT_1_EDX] &= ~CPUID_APIC;
	}

	bool cpu_is_bsp(X86CPU *cpu)
	{
	return cpu_get_apic_base(cpu->apic_state) & MSR_IA32_APICBASE_BSP;
	}

	/* TODO: remove me, when reset over QOM tree is implemented */
	void x86_cpu_machine_reset_cb(void *opaque)
	{
	X86CPU *cpu = opaque;
	cpu_reset(CPU(cpu));
	}

	APICCommonClass apic_get_class(Error *errp)
	{
	const char *apic_type = "apic";

	/* TODO: in-kernel irqchip for hvf */
	if (kvm_enabled()) {
	if (!kvm_irqchip_in_kernel()) {
	error_setg(errp, "KVM does not support userspace APIC");
	return NULL;
	}
	apic_type = "kvm-apic";
	} else if (xen_enabled()) {
	apic_type = "xen-apic";
	} else if (whpx_apic_in_platform()) {
	apic_type = "whpx-apic";
	}

	return APIC_COMMON_CLASS(object_class_by_name(apic_type));
	}

	void x86_cpu_apic_create(X86CPU cpu, Error *errp)
	{
	APICCommonState *apic;
	APICCommonClass *apic_class = apic_get_class(errp);

	if (!apic_class) {
	return;
	}

	cpu->apic_state = DEVICE(object_new_with_class(OBJECT_CLASS(apic_class)));
	object_property_add_child(OBJECT(cpu), "lapic",
	OBJECT(cpu->apic_state));
	object_unref(OBJECT(cpu->apic_state));

	qdev_prop_set_uint32(cpu->apic_state, "id", cpu->apic_id);
	/* TODO: convert to link<> */
	apic = APIC_COMMON(cpu->apic_state);
	apic->cpu = cpu;
	apic->apicbase = APIC_DEFAULT_ADDRESS \| MSR_IA32_APICBASE_ENABLE;
	}

	void x86_cpu_apic_realize(X86CPU cpu, Error *errp)
	{
	APICCommonState *apic;
	static bool apic_mmio_map_once;

	if (cpu->apic_state == NULL) {
	return;
	}
	qdev_realize(DEVICE(cpu->apic_state), NULL, errp);

	/* Map APIC MMIO area */
	apic = APIC_COMMON(cpu->apic_state);
	if (!apic_mmio_map_once) {
	memory_region_add_subregion_overlap(get_system_memory(),
	apic->apicbase &
	MSR_IA32_APICBASE_BASE,
	&apic->io_memory,
	0x1000);
	apic_mmio_map_once = true;
	}
	}

	GuestPanicInformation x86_cpu_get_crash_info(CPUState cs)
	{
	X86CPU *cpu = X86_CPU(cs);
	CPUX86State *env = &cpu->env;
	GuestPanicInformation *panic_info = NULL;

	if (hyperv_feat_enabled(cpu, HYPERV_FEAT_CRASH)) {
	panic_info = g_new0(GuestPanicInformation, 1);

	panic_info->type = GUEST_PANIC_INFORMATION_TYPE_HYPER_V;

	assert(HV_CRASH_PARAMS >= 5);
	panic_info->u.hyper_v.arg1 = env->msr_hv_crash_params[0];
	panic_info->u.hyper_v.arg2 = env->msr_hv_crash_params[1];
	panic_info->u.hyper_v.arg3 = env->msr_hv_crash_params[2];
	panic_info->u.hyper_v.arg4 = env->msr_hv_crash_params[3];
	panic_info->u.hyper_v.arg5 = env->msr_hv_crash_params[4];
	}

	return panic_info;
	}
	void x86_cpu_get_crash_info_qom(Object obj, Visitor v,
	const char name, void opaque,
	Error **errp)
	{
	CPUState *cs = CPU(obj);
	GuestPanicInformation *panic_info;

	if (!cs->crash_occurred) {
	error_setg(errp, "No crash occurred");
	return;
	}

	panic_info = x86_cpu_get_crash_info(cs);
	if (panic_info == NULL) {
	error_setg(errp, "No crash information");
	return;
	}

	visit_type_GuestPanicInformation(v, "crash-information", &panic_info,
	errp);
	qapi_free_GuestPanicInformation(panic_info);
	}