diff options
Diffstat (limited to 'hw/intc/apic_common.c')
| -rw-r--r-- | hw/intc/apic_common.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c new file mode 100644 index 0000000000..e0ae07afd5 --- /dev/null +++ b/hw/intc/apic_common.c @@ -0,0 +1,402 @@ +/* + * 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 "hw/i386/apic.h" +#include "hw/i386/apic_internal.h" +#include "trace.h" +#include "sysemu/kvm.h" + +static int apic_irq_delivered; +bool apic_report_tpr_access; + +void cpu_set_apic_base(DeviceState *d, uint64_t val) +{ + trace_cpu_set_apic_base(val); + + if (d) { + APICCommonState *s = APIC_COMMON(d); + APICCommonClass *info = APIC_COMMON_GET_CLASS(s); + info->set_base(s, val); + } +} + +uint64_t cpu_get_apic_base(DeviceState *d) +{ + if (d) { + APICCommonState *s = APIC_COMMON(d); + 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 *d, uint8_t val) +{ + APICCommonState *s; + APICCommonClass *info; + + if (!d) { + return; + } + + s = APIC_COMMON(d); + info = APIC_COMMON_GET_CLASS(s); + + info->set_tpr(s, val); +} + +uint8_t cpu_get_apic_tpr(DeviceState *d) +{ + APICCommonState *s; + APICCommonClass *info; + + if (!d) { + return 0; + } + + s = APIC_COMMON(d); + info = APIC_COMMON_GET_CLASS(s); + + return info->get_tpr(s); +} + +void apic_enable_tpr_access_reporting(DeviceState *d, bool enable) +{ + APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d); + 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 *d, hwaddr paddr) +{ + APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d); + APICCommonClass *info = APIC_COMMON_GET_CLASS(s); + + s->vapic_paddr = paddr; + info->vapic_base_update(s); +} + +void apic_handle_tpr_access_report(DeviceState *d, target_ulong ip, + TPRAccess access) +{ + APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d); + + 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) +{ + trace_apic_reset_irq_delivered(apic_irq_delivered); + + 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 *d) +{ + APICCommonState *s = APIC_COMMON(d); + 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 *d) +{ + APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d); + int i; + + if (!s) { + return; + } + 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 = 1; + + if (s->timer) { + qemu_del_timer(s->timer); + } + s->timer_expiry = -1; +} + +void apic_designate_bsp(DeviceState *d) +{ + if (d == NULL) { + return; + } + + APICCommonState *s = APIC_COMMON(d); + s->apicbase |= MSR_IA32_APICBASE_BSP; +} + +static void apic_reset_common(DeviceState *d) +{ + APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d); + APICCommonClass *info = APIC_COMMON_GET_CLASS(s); + bool bsp; + + bsp = cpu_is_bsp(s->cpu); + s->apicbase = APIC_DEFAULT_ADDRESS | + (bsp ? MSR_IA32_APICBASE_BSP : 0) | MSR_IA32_APICBASE_ENABLE; + + s->vapic_paddr = 0; + info->vapic_base_update(s); + + apic_init_reset(d); + + if (bsp) { + /* + * LINT0 delivery mode on CPU #0 is set to ExtInt at initialization + * time typically by BIOS, so PIC interrupt can be delivered to the + * processor when local APIC is enabled. + */ + s->lvt[APIC_LVT_LINT0] = 0x700; + } +} + +/* 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 int apic_init_common(SysBusDevice *dev) +{ + APICCommonState *s = APIC_COMMON(dev); + APICCommonClass *info; + static DeviceState *vapic; + static int apic_no; + + if (apic_no >= MAX_APICS) { + return -1; + } + s->idx = apic_no++; + + info = APIC_COMMON_GET_CLASS(s); + info->init(s); + + sysbus_init_mmio(dev, &s->io_memory); + + /* Note: We need at least 1M to map the VAPIC option ROM */ + if (!vapic && s->vapic_control & VAPIC_ENABLE_MASK && + 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); + } + + 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 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_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() + } +}; + +static Property apic_properties_common[] = { + DEFINE_PROP_UINT8("id", APICCommonState, id, -1), + DEFINE_PROP_BIT("vapic", APICCommonState, vapic_control, VAPIC_ENABLE_BIT, + true), + DEFINE_PROP_END_OF_LIST(), +}; + +static void apic_common_class_init(ObjectClass *klass, void *data) +{ + SysBusDeviceClass *sc = SYS_BUS_DEVICE_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->vmsd = &vmstate_apic_common; + dc->reset = apic_reset_common; + dc->no_user = 1; + dc->props = apic_properties_common; + sc->init = apic_init_common; +} + +static const TypeInfo apic_common_type = { + .name = TYPE_APIC_COMMON, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(APICCommonState), + .class_size = sizeof(APICCommonClass), + .class_init = apic_common_class_init, + .abstract = true, +}; + +static void register_types(void) +{ + type_register_static(&apic_common_type); +} + +type_init(register_types) |