/* * APIC support - common bits of emulated and KVM kernel model * * Copyright (c) 2004-2005 Fabrice Bellard * Copyright (c) 2011 Jan Kiszka, Siemens AG * * 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 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 "qemu/error-report.h" #include "qapi/error.h" #include "qemu-common.h" #include "cpu.h" #include "qapi/visitor.h" #include "hw/i386/apic.h" #include "hw/i386/apic_internal.h" #include "trace.h" #include "sysemu/hax.h" #include "sysemu/kvm.h" #include "hw/qdev.h" #include "hw/sysbus.h" static int apic_irq_delivered; bool apic_report_tpr_access; void cpu_set_apic_base(DeviceState *dev, uint64_t val) { trace_cpu_set_apic_base(val); if (dev) { APICCommonState *s = APIC_COMMON(dev); APICCommonClass *info = APIC_COMMON_GET_CLASS(s); /* switching to x2APIC, reset possibly modified xAPIC ID */ if (!(s->apicbase & MSR_IA32_APICBASE_EXTD) && (val & MSR_IA32_APICBASE_EXTD)) { s->id = s->initial_apic_id; } info->set_base(s, val); } } uint64_t cpu_get_apic_base(DeviceState *dev) { if (dev) { APICCommonState *s = APIC_COMMON(dev); trace_cpu_get_apic_base((uint64_t)s->apicbase); return s->apicbase; } else { trace_cpu_get_apic_base(MSR_IA32_APICBASE_BSP); return MSR_IA32_APICBASE_BSP; } } void cpu_set_apic_tpr(DeviceState *dev, uint8_t val) { APICCommonState *s; APICCommonClass *info; if (!dev) { return; } s = APIC_COMMON(dev); info = APIC_COMMON_GET_CLASS(s); info->set_tpr(s, val); } uint8_t cpu_get_apic_tpr(DeviceState *dev) { APICCommonState *s; APICCommonClass *info; if (!dev) { return 0; } s = APIC_COMMON(dev); info = APIC_COMMON_GET_CLASS(s); return info->get_tpr(s); } void apic_enable_tpr_access_reporting(DeviceState *dev, bool enable) { APICCommonState *s = APIC_COMMON(dev); APICCommonClass *info = APIC_COMMON_GET_CLASS(s); apic_report_tpr_access = enable; if (info->enable_tpr_reporting) { info->enable_tpr_reporting(s, enable); } } void apic_enable_vapic(DeviceState *dev, hwaddr paddr) { APICCommonState *s = APIC_COMMON(dev); APICCommonClass *info = APIC_COMMON_GET_CLASS(s); s->vapic_paddr = paddr; info->vapic_base_update(s); } void apic_handle_tpr_access_report(DeviceState *dev, target_ulong ip, TPRAccess access) { APICCommonState *s = APIC_COMMON(dev); vapic_report_tpr_access(s->vapic, CPU(s->cpu), ip, access); } void apic_report_irq_delivered(int delivered) { apic_irq_delivered += delivered; trace_apic_report_irq_delivered(apic_irq_delivered); } void apic_reset_irq_delivered(void) { /* Copy this into a local variable to encourage gcc to emit a plain * register for a sys/sdt.h marker. For details on this workaround, see: * https://sourceware.org/bugzilla/show_bug.cgi?id=13296 */ volatile int a_i_d = apic_irq_delivered; trace_apic_reset_irq_delivered(a_i_d); apic_irq_delivered = 0; } int apic_get_irq_delivered(void) { trace_apic_get_irq_delivered(apic_irq_delivered); return apic_irq_delivered; } void apic_deliver_nmi(DeviceState *dev) { APICCommonState *s = APIC_COMMON(dev); APICCommonClass *info = APIC_COMMON_GET_CLASS(s); info->external_nmi(s); } bool apic_next_timer(APICCommonState *s, int64_t current_time) { int64_t d; /* We need to store the timer state separately to support APIC * implementations that maintain a non-QEMU timer, e.g. inside the * host kernel. This open-coded state allows us to migrate between * both models. */ s->timer_expiry = -1; if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED) { return false; } d = (current_time - s->initial_count_load_time) >> s->count_shift; if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) { if (!s->initial_count) { return false; } d = ((d / ((uint64_t)s->initial_count + 1)) + 1) * ((uint64_t)s->initial_count + 1); } else { if (d >= s->initial_count) { return false; } d = (uint64_t)s->initial_count + 1; } s->next_time = s->initial_count_load_time + (d << s->count_shift); s->timer_expiry = s->next_time; return true; } void apic_init_reset(DeviceState *dev) { APICCommonState *s; APICCommonClass *info; int i; if (!dev) { return; } s = APIC_COMMON(dev); s->tpr = 0; s->spurious_vec = 0xff; s->log_dest = 0; s->dest_mode = 0xf; memset(s->isr, 0, sizeof(s->isr)); memset(s->tmr, 0, sizeof(s->tmr)); memset(s->irr, 0, sizeof(s->irr)); for (i = 0; i < APIC_LVT_NB; i++) { s->lvt[i] = APIC_LVT_MASKED; } s->esr = 0; memset(s->icr, 0, sizeof(s->icr)); s->divide_conf = 0; s->count_shift = 0; s->initial_count = 0; s->initial_count_load_time = 0; s->next_time = 0; s->wait_for_sipi = !cpu_is_bsp(s->cpu); if (s->timer) { timer_del(s->timer); } s->timer_expiry = -1; info = APIC_COMMON_GET_CLASS(s); if (info->reset) { info->reset(s); } } void apic_designate_bsp(DeviceState *dev, bool bsp) { if (dev == NULL) { return; } APICCommonState *s = APIC_COMMON(dev); if (bsp) { s->apicbase |= MSR_IA32_APICBASE_BSP; } else { s->apicbase &= ~MSR_IA32_APICBASE_BSP; } } static void apic_reset_common(DeviceState *dev) { APICCommonState *s = APIC_COMMON(dev); APICCommonClass *info = APIC_COMMON_GET_CLASS(s); uint32_t bsp; bsp = s->apicbase & MSR_IA32_APICBASE_BSP; s->apicbase = APIC_DEFAULT_ADDRESS | bsp | MSR_IA32_APICBASE_ENABLE; s->id = s->initial_apic_id; apic_reset_irq_delivered(); s->vapic_paddr = 0; info->vapic_base_update(s); apic_init_reset(dev); } /* This function is only used for old state version 1 and 2 */ static int apic_load_old(QEMUFile *f, void *opaque, int version_id) { APICCommonState *s = opaque; APICCommonClass *info = APIC_COMMON_GET_CLASS(s); int i; if (version_id > 2) { return -EINVAL; } /* XXX: what if the base changes? (registered memory regions) */ qemu_get_be32s(f, &s->apicbase); qemu_get_8s(f, &s->id); qemu_get_8s(f, &s->arb_id); qemu_get_8s(f, &s->tpr); qemu_get_be32s(f, &s->spurious_vec); qemu_get_8s(f, &s->log_dest); qemu_get_8s(f, &s->dest_mode); for (i = 0; i < 8; i++) { qemu_get_be32s(f, &s->isr[i]); qemu_get_be32s(f, &s->tmr[i]); qemu_get_be32s(f, &s->irr[i]); } for (i = 0; i < APIC_LVT_NB; i++) { qemu_get_be32s(f, &s->lvt[i]); } qemu_get_be32s(f, &s->esr); qemu_get_be32s(f, &s->icr[0]); qemu_get_be32s(f, &s->icr[1]); qemu_get_be32s(f, &s->divide_conf); s->count_shift = qemu_get_be32(f); qemu_get_be32s(f, &s->initial_count); s->initial_count_load_time = qemu_get_be64(f); s->next_time = qemu_get_be64(f); if (version_id >= 2) { s->timer_expiry = qemu_get_be64(f); } if (info->post_load) { info->post_load(s); } return 0; } static const VMStateDescription vmstate_apic_common; static void apic_common_realize(DeviceState *dev, Error **errp) { APICCommonState *s = APIC_COMMON(dev); APICCommonClass *info; static DeviceState *vapic; int instance_id = s->id; info = APIC_COMMON_GET_CLASS(s); info->realize(dev, errp); /* Note: We need at least 1M to map the VAPIC option ROM */ if (!vapic && s->vapic_control & VAPIC_ENABLE_MASK && !hax_enabled() && ram_size >= 1024 * 1024) { vapic = sysbus_create_simple("kvmvapic", -1, NULL); } s->vapic = vapic; if (apic_report_tpr_access && info->enable_tpr_reporting) { info->enable_tpr_reporting(s, true); } if (s->legacy_instance_id) { instance_id = -1; } vmstate_register_with_alias_id(NULL, instance_id, &vmstate_apic_common, s, -1, 0, NULL); } static void apic_common_unrealize(DeviceState *dev, Error **errp) { APICCommonState *s = APIC_COMMON(dev); APICCommonClass *info = APIC_COMMON_GET_CLASS(s); vmstate_unregister(NULL, &vmstate_apic_common, s); info->unrealize(dev, errp); if (apic_report_tpr_access && info->enable_tpr_reporting) { info->enable_tpr_reporting(s, false); } } static int apic_pre_load(void *opaque) { APICCommonState *s = APIC_COMMON(opaque); /* The default is !cpu_is_bsp(s->cpu), but the common value is 0 * so that's what apic_common_sipi_needed checks for. Reset to * the value that is assumed when the apic_sipi subsection is * absent. */ s->wait_for_sipi = 0; return 0; } static int apic_dispatch_pre_save(void *opaque) { APICCommonState *s = APIC_COMMON(opaque); APICCommonClass *info = APIC_COMMON_GET_CLASS(s); if (info->pre_save) { info->pre_save(s); } return 0; } static int apic_dispatch_post_load(void *opaque, int version_id) { APICCommonState *s = APIC_COMMON(opaque); APICCommonClass *info = APIC_COMMON_GET_CLASS(s); if (info->post_load) { info->post_load(s); } return 0; } static bool apic_common_sipi_needed(void *opaque) { APICCommonState *s = APIC_COMMON(opaque); return s->wait_for_sipi != 0; } static const VMStateDescription vmstate_apic_common_sipi = { .name = "apic_sipi", .version_id = 1, .minimum_version_id = 1, .needed = apic_common_sipi_needed, .fields = (VMStateField[]) { VMSTATE_INT32(sipi_vector, APICCommonState), VMSTATE_INT32(wait_for_sipi, APICCommonState), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_apic_common = { .name = "apic", .version_id = 3, .minimum_version_id = 3, .minimum_version_id_old = 1, .load_state_old = apic_load_old, .pre_load = apic_pre_load, .pre_save = apic_dispatch_pre_save, .post_load = apic_dispatch_post_load, .fields = (VMStateField[]) { VMSTATE_UINT32(apicbase, APICCommonState), VMSTATE_UINT8(id, APICCommonState), VMSTATE_UINT8(arb_id, APICCommonState), VMSTATE_UINT8(tpr, APICCommonState), VMSTATE_UINT32(spurious_vec, APICCommonState), VMSTATE_UINT8(log_dest, APICCommonState), VMSTATE_UINT8(dest_mode, APICCommonState), VMSTATE_UINT32_ARRAY(isr, APICCommonState, 8), VMSTATE_UINT32_ARRAY(tmr, APICCommonState, 8), VMSTATE_UINT32_ARRAY(irr, APICCommonState, 8), VMSTATE_UINT32_ARRAY(lvt, APICCommonState, APIC_LVT_NB), VMSTATE_UINT32(esr, APICCommonState), VMSTATE_UINT32_ARRAY(icr, APICCommonState, 2), VMSTATE_UINT32(divide_conf, APICCommonState), VMSTATE_INT32(count_shift, APICCommonState), VMSTATE_UINT32(initial_count, APICCommonState), VMSTATE_INT64(initial_count_load_time, APICCommonState), VMSTATE_INT64(next_time, APICCommonState), VMSTATE_INT64(timer_expiry, APICCommonState), /* open-coded timer state */ VMSTATE_END_OF_LIST() }, .subsections = (const VMStateDescription*[]) { &vmstate_apic_common_sipi, NULL } }; static Property apic_properties_common[] = { DEFINE_PROP_UINT8("version", APICCommonState, version, 0x14), DEFINE_PROP_BIT("vapic", APICCommonState, vapic_control, VAPIC_ENABLE_BIT, true), DEFINE_PROP_BOOL("legacy-instance-id", APICCommonState, legacy_instance_id, false), DEFINE_PROP_END_OF_LIST(), }; static void apic_common_get_id(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { APICCommonState *s = APIC_COMMON(obj); uint32_t value; value = s->apicbase & MSR_IA32_APICBASE_EXTD ? s->initial_apic_id : s->id; visit_type_uint32(v, name, &value, errp); } static void apic_common_set_id(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { APICCommonState *s = APIC_COMMON(obj); DeviceState *dev = DEVICE(obj); Error *local_err = NULL; uint32_t value; if (dev->realized) { qdev_prop_set_after_realize(dev, name, errp); return; } visit_type_uint32(v, name, &value, &local_err); if (local_err) { error_propagate(errp, local_err); return; } s->initial_apic_id = value; s->id = (uint8_t)value; } static void apic_common_initfn(Object *obj) { APICCommonState *s = APIC_COMMON(obj); s->id = s->initial_apic_id = -1; object_property_add(obj, "id", "uint32", apic_common_get_id, apic_common_set_id, NULL, NULL, NULL); } static void apic_common_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->reset = apic_reset_common; dc->props = apic_properties_common; dc->realize = apic_common_realize; dc->unrealize = apic_common_unrealize; /* * Reason: APIC and CPU need to be wired up by * x86_cpu_apic_create() */ dc->user_creatable = false; } static const TypeInfo apic_common_type = { .name = TYPE_APIC_COMMON, .parent = TYPE_DEVICE, .instance_size = sizeof(APICCommonState), .instance_init = apic_common_initfn, .class_size = sizeof(APICCommonClass), .class_init = apic_common_class_init, .abstract = true, }; static void apic_common_register_types(void) { type_register_static(&apic_common_type); } type_init(apic_common_register_types)