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/*
* QEMU x86 CPU <-> APIC
*
* Copyright (c) 2003-2004 Fabrice Bellard
*
* SPDX-License-Identifier: MIT
*/
#include "qemu/osdep.h"
#include "qapi/qmp/qdict.h"
#include "qapi/error.h"
#include "monitor/monitor.h"
#include "monitor/hmp-target.h"
#include "sysemu/hw_accel.h"
#include "sysemu/kvm.h"
#include "sysemu/xen.h"
#include "exec/address-spaces.h"
#include "hw/qdev-properties.h"
#include "hw/i386/apic_internal.h"
#include "cpu-internal.h"
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));
/* TODO: convert to link<> */
apic = APIC_COMMON(cpu->apic_state);
apic->cpu = cpu;
apic->apicbase = APIC_DEFAULT_ADDRESS | MSR_IA32_APICBASE_ENABLE;
/*
* apic_common_set_id needs to check if the CPU has x2APIC
* feature in case APIC ID >= 255, so we need to set apic->cpu
* before setting APIC ID
*/
qdev_prop_set_uint32(cpu->apic_state, "id", cpu->apic_id);
}
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;
}
}
void hmp_info_local_apic(Monitor *mon, const QDict *qdict)
{
CPUState *cs;
if (qdict_haskey(qdict, "apic-id")) {
int id = qdict_get_try_int(qdict, "apic-id", 0);
cs = cpu_by_arch_id(id);
if (cs) {
cpu_synchronize_state(cs);
}
} else {
cs = mon_get_cpu(mon);
}
if (!cs) {
monitor_printf(mon, "No CPU available\n");
return;
}
x86_cpu_dump_local_apic_state(cs, CPU_DUMP_FPU);
}
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