Archipelago » qemu

/*

 * KVM in-kernel APIC support

 *

 * Copyright (c) 2011 Siemens AG

 *

 * Authors:

 *  Jan Kiszka          <jan.kiszka@siemens.com>

 *

 * This work is licensed under the terms of the GNU GPL version 2.

 * See the COPYING file in the top-level directory.

 */

#include "hw/apic_internal.h"

#include "hw/pci/msi.h"

#include "sysemu/kvm.h"

static inline void kvm_apic_set_reg(struct kvm_lapic_state *kapic,

                                    int reg_id, uint32_t val)

{

    *((uint32_t *)(kapic->regs + (reg_id << 4))) = val;

}

static inline uint32_t kvm_apic_get_reg(struct kvm_lapic_state *kapic,

                                        int reg_id)

{

    return *((uint32_t *)(kapic->regs + (reg_id << 4)));

}

void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)

{

    APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);

    int i;

    memset(kapic, 0, sizeof(*kapic));

    kvm_apic_set_reg(kapic, 0x2, s->id << 24);

    kvm_apic_set_reg(kapic, 0x8, s->tpr);

    kvm_apic_set_reg(kapic, 0xd, s->log_dest << 24);

    kvm_apic_set_reg(kapic, 0xe, s->dest_mode << 28 | 0x0fffffff);

    kvm_apic_set_reg(kapic, 0xf, s->spurious_vec);

    for (i = 0; i < 8; i++) {

        kvm_apic_set_reg(kapic, 0x10 + i, s->isr[i]);

        kvm_apic_set_reg(kapic, 0x18 + i, s->tmr[i]);

        kvm_apic_set_reg(kapic, 0x20 + i, s->irr[i]);

    }

    kvm_apic_set_reg(kapic, 0x28, s->esr);

    kvm_apic_set_reg(kapic, 0x30, s->icr[0]);

    kvm_apic_set_reg(kapic, 0x31, s->icr[1]);

    for (i = 0; i < APIC_LVT_NB; i++) {

        kvm_apic_set_reg(kapic, 0x32 + i, s->lvt[i]);

    }

    kvm_apic_set_reg(kapic, 0x38, s->initial_count);

    kvm_apic_set_reg(kapic, 0x3e, s->divide_conf);

}

void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)

{

    APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);

    int i, v;

    s->id = kvm_apic_get_reg(kapic, 0x2) >> 24;

    s->tpr = kvm_apic_get_reg(kapic, 0x8);

    s->arb_id = kvm_apic_get_reg(kapic, 0x9);

    s->log_dest = kvm_apic_get_reg(kapic, 0xd) >> 24;

    s->dest_mode = kvm_apic_get_reg(kapic, 0xe) >> 28;

    s->spurious_vec = kvm_apic_get_reg(kapic, 0xf);

    for (i = 0; i < 8; i++) {

        s->isr[i] = kvm_apic_get_reg(kapic, 0x10 + i);

        s->tmr[i] = kvm_apic_get_reg(kapic, 0x18 + i);

        s->irr[i] = kvm_apic_get_reg(kapic, 0x20 + i);

    }

    s->esr = kvm_apic_get_reg(kapic, 0x28);

    s->icr[0] = kvm_apic_get_reg(kapic, 0x30);

    s->icr[1] = kvm_apic_get_reg(kapic, 0x31);

    for (i = 0; i < APIC_LVT_NB; i++) {

        s->lvt[i] = kvm_apic_get_reg(kapic, 0x32 + i);

    }

    s->initial_count = kvm_apic_get_reg(kapic, 0x38);

    s->divide_conf = kvm_apic_get_reg(kapic, 0x3e);

    v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4);

    s->count_shift = (v + 1) & 7;

    s->initial_count_load_time = qemu_get_clock_ns(vm_clock);

    apic_next_timer(s, s->initial_count_load_time);

}

static void kvm_apic_set_base(APICCommonState *s, uint64_t val)

{

    s->apicbase = val;

}

static void kvm_apic_set_tpr(APICCommonState *s, uint8_t val)

{

    s->tpr = (val & 0x0f) << 4;

}

static uint8_t kvm_apic_get_tpr(APICCommonState *s)

{

    return s->tpr >> 4;

}

static void kvm_apic_enable_tpr_reporting(APICCommonState *s, bool enable)

{

    struct kvm_tpr_access_ctl ctl = {

        .enabled = enable

    };

    kvm_vcpu_ioctl(&s->cpu->env, KVM_TPR_ACCESS_REPORTING, &ctl);

}

static void kvm_apic_vapic_base_update(APICCommonState *s)

{

    struct kvm_vapic_addr vapid_addr = {

        .vapic_addr = s->vapic_paddr,

    };

    int ret;

    ret = kvm_vcpu_ioctl(&s->cpu->env, KVM_SET_VAPIC_ADDR, &vapid_addr);

    if (ret < 0) {

        fprintf(stderr, "KVM: setting VAPIC address failed (%s)\n",

                strerror(-ret));

        abort();

    }

}

static void do_inject_external_nmi(void *data)

{

    APICCommonState *s = data;

    CPUX86State *env = &s->cpu->env;

    uint32_t lvt;

    int ret;

    cpu_synchronize_state(env);

    lvt = s->lvt[APIC_LVT_LINT1];

    if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) {

        ret = kvm_vcpu_ioctl(env, KVM_NMI);

        if (ret < 0) {

            fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n",

                    strerror(-ret));

        }

    }

}

static void kvm_apic_external_nmi(APICCommonState *s)

{

    run_on_cpu(CPU(s->cpu), do_inject_external_nmi, s);

}

static uint64_t kvm_apic_mem_read(void *opaque, hwaddr addr,

                                  unsigned size)

{

    return ~(uint64_t)0;

}

static void kvm_apic_mem_write(void *opaque, hwaddr addr,

                               uint64_t data, unsigned size)

{

    MSIMessage msg = { .address = addr, .data = data };

    int ret;

    ret = kvm_irqchip_send_msi(kvm_state, msg);

    if (ret < 0) {

        fprintf(stderr, "KVM: injection failed, MSI lost (%s)\n",

                strerror(-ret));

    }

}

static const MemoryRegionOps kvm_apic_io_ops = {

    .read = kvm_apic_mem_read,

    .write = kvm_apic_mem_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static void kvm_apic_init(APICCommonState *s)

{

    memory_region_init_io(&s->io_memory, &kvm_apic_io_ops, s, "kvm-apic-msi",

                          MSI_SPACE_SIZE);

    if (kvm_has_gsi_routing()) {

        msi_supported = true;

    }

}

static void kvm_apic_class_init(ObjectClass *klass, void *data)

{

    APICCommonClass *k = APIC_COMMON_CLASS(klass);

    k->init = kvm_apic_init;

    k->set_base = kvm_apic_set_base;

    k->set_tpr = kvm_apic_set_tpr;

    k->get_tpr = kvm_apic_get_tpr;

    k->enable_tpr_reporting = kvm_apic_enable_tpr_reporting;

    k->vapic_base_update = kvm_apic_vapic_base_update;

    k->external_nmi = kvm_apic_external_nmi;

}

static TypeInfo kvm_apic_info = {

    .name = "kvm-apic",

    .parent = TYPE_APIC_COMMON,

    .instance_size = sizeof(APICCommonState),

    .class_init = kvm_apic_class_init,

};

static void kvm_apic_register_types(void)

{

    type_register_static(&kvm_apic_info);

}

type_init(kvm_apic_register_types)