| /* |
| * 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 void 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); |
| } |
| } |
| |
| 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); |
| int64_t value; |
| |
| value = s->apicbase & MSR_IA32_APICBASE_EXTD ? s->initial_apic_id : s->id; |
| visit_type_int(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; |
| int64_t value; |
| |
| if (dev->realized) { |
| qdev_prop_set_after_realize(dev, name, errp); |
| return; |
| } |
| |
| visit_type_int(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", "int", |
| 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) |