Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

6 files changed, 1298 insertions, 0 deletions

diff --git a/hw/i386/kvm/apic.c b/hw/i386/kvm/apic.c
new file mode 100644
index 000000000..1e89ca089
--- /dev/null
+++ b/hw/i386/kvm/apic.c
@@ -0,0 +1,271 @@
+/*
+ * 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 "qemu/osdep.h"
+#include "qemu/module.h"
+#include "hw/i386/apic_internal.h"
+#include "hw/pci/msi.h"
+#include "sysemu/hw_accel.h"
+#include "sysemu/kvm.h"
+#include "kvm/kvm_i386.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)));
+}
+
+static void kvm_put_apic_state(APICCommonState *s, struct kvm_lapic_state *kapic)
+{
+    int i;
+
+    memset(kapic, 0, sizeof(*kapic));
+    if (kvm_has_x2apic_api() && s->apicbase & MSR_IA32_APICBASE_EXTD) {
+        kvm_apic_set_reg(kapic, 0x2, s->initial_apic_id);
+    } else {
+        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 *dev, struct kvm_lapic_state *kapic)
+{
+    APICCommonState *s = APIC_COMMON(dev);
+    int i, v;
+
+    if (kvm_has_x2apic_api() && s->apicbase & MSR_IA32_APICBASE_EXTD) {
+        assert(kvm_apic_get_reg(kapic, 0x2) == s->initial_apic_id);
+    } else {
+        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_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    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(CPU(s->cpu), 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(CPU(s->cpu), KVM_SET_VAPIC_ADDR, &vapid_addr);
+    if (ret < 0) {
+        fprintf(stderr, "KVM: setting VAPIC address failed (%s)\n",
+                strerror(-ret));
+        abort();
+    }
+}
+
+static void kvm_apic_put(CPUState *cs, run_on_cpu_data data)
+{
+    APICCommonState *s = data.host_ptr;
+    struct kvm_lapic_state kapic;
+    int ret;
+
+    kvm_put_apicbase(s->cpu, s->apicbase);
+    kvm_put_apic_state(s, &kapic);
+
+    ret = kvm_vcpu_ioctl(CPU(s->cpu), KVM_SET_LAPIC, &kapic);
+    if (ret < 0) {
+        fprintf(stderr, "KVM_SET_LAPIC failed: %s\n", strerror(-ret));
+        abort();
+    }
+}
+
+static void kvm_apic_post_load(APICCommonState *s)
+{
+    run_on_cpu(CPU(s->cpu), kvm_apic_put, RUN_ON_CPU_HOST_PTR(s));
+}
+
+static void do_inject_external_nmi(CPUState *cpu, run_on_cpu_data data)
+{
+    APICCommonState *s = data.host_ptr;
+    uint32_t lvt;
+    int ret;
+
+    cpu_synchronize_state(cpu);
+
+    lvt = s->lvt[APIC_LVT_LINT1];
+    if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) {
+        ret = kvm_vcpu_ioctl(cpu, 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, RUN_ON_CPU_HOST_PTR(s));
+}
+
+static void kvm_send_msi(MSIMessage *msg)
+{
+    int ret;
+
+    /*
+     * The message has already passed through interrupt remapping if enabled,
+     * but the legacy extended destination ID in low bits still needs to be
+     * handled.
+     */
+    msg->address = kvm_swizzle_msi_ext_dest_id(msg->address);
+
+    ret = kvm_irqchip_send_msi(kvm_state, *msg);
+    if (ret < 0) {
+        fprintf(stderr, "KVM: injection failed, MSI lost (%s)\n",
+                strerror(-ret));
+    }
+}
+
+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 };
+
+    kvm_send_msi(&msg);
+}
+
+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_reset(APICCommonState *s)
+{
+    /* Not used by KVM, which uses the CPU mp_state instead.  */
+    s->wait_for_sipi = 0;
+
+    run_on_cpu(CPU(s->cpu), kvm_apic_put, RUN_ON_CPU_HOST_PTR(s));
+}
+
+static void kvm_apic_realize(DeviceState *dev, Error **errp)
+{
+    APICCommonState *s = APIC_COMMON(dev);
+
+    memory_region_init_io(&s->io_memory, OBJECT(s), &kvm_apic_io_ops, s,
+                          "kvm-apic-msi", APIC_SPACE_SIZE);
+
+    assert(kvm_has_gsi_routing());
+    msi_nonbroken = true;
+}
+
+static void kvm_apic_unrealize(DeviceState *dev)
+{
+}
+
+static void kvm_apic_class_init(ObjectClass *klass, void *data)
+{
+    APICCommonClass *k = APIC_COMMON_CLASS(klass);
+
+    k->realize = kvm_apic_realize;
+    k->unrealize = kvm_apic_unrealize;
+    k->reset = kvm_apic_reset;
+    k->set_base = kvm_apic_set_base;
+    k->set_tpr = kvm_apic_set_tpr;
+    k->get_tpr = kvm_apic_get_tpr;
+    k->post_load = kvm_apic_post_load;
+    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;
+    k->send_msi = kvm_send_msi;
+}
+
+static const 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)
diff --git a/hw/i386/kvm/clock.c b/hw/i386/kvm/clock.c
new file mode 100644
index 000000000..df70b4a03
--- /dev/null
+++ b/hw/i386/kvm/clock.c
@@ -0,0 +1,350 @@
+/*
+ * QEMU KVM support, paravirtual clock device
+ *
+ * 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.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/host-utils.h"
+#include "qemu/module.h"
+#include "sysemu/kvm.h"
+#include "sysemu/runstate.h"
+#include "sysemu/hw_accel.h"
+#include "kvm/kvm_i386.h"
+#include "migration/vmstate.h"
+#include "hw/sysbus.h"
+#include "hw/kvm/clock.h"
+#include "hw/qdev-properties.h"
+#include "qapi/error.h"
+
+#include <linux/kvm.h>
+#include "standard-headers/asm-x86/kvm_para.h"
+#include "qom/object.h"
+
+#define TYPE_KVM_CLOCK "kvmclock"
+OBJECT_DECLARE_SIMPLE_TYPE(KVMClockState, KVM_CLOCK)
+
+struct KVMClockState {
+    /*< private >*/
+    SysBusDevice busdev;
+    /*< public >*/
+
+    uint64_t clock;
+    bool clock_valid;
+
+    /* whether the 'clock' value was obtained in the 'paused' state */
+    bool runstate_paused;
+
+    /* whether machine type supports reliable KVM_GET_CLOCK */
+    bool mach_use_reliable_get_clock;
+
+    /* whether the 'clock' value was obtained in a host with
+     * reliable KVM_GET_CLOCK */
+    bool clock_is_reliable;
+};
+
+struct pvclock_vcpu_time_info {
+    uint32_t   version;
+    uint32_t   pad0;
+    uint64_t   tsc_timestamp;
+    uint64_t   system_time;
+    uint32_t   tsc_to_system_mul;
+    int8_t     tsc_shift;
+    uint8_t    flags;
+    uint8_t    pad[2];
+} __attribute__((__packed__)); /* 32 bytes */
+
+static uint64_t kvmclock_current_nsec(KVMClockState *s)
+{
+    CPUState *cpu = first_cpu;
+    CPUX86State *env = cpu->env_ptr;
+    hwaddr kvmclock_struct_pa;
+    uint64_t migration_tsc = env->tsc;
+    struct pvclock_vcpu_time_info time;
+    uint64_t delta;
+    uint64_t nsec_lo;
+    uint64_t nsec_hi;
+    uint64_t nsec;
+
+    cpu_synchronize_state(cpu);
+
+    if (!(env->system_time_msr & 1ULL)) {
+        /* KVM clock not active */
+        return 0;
+    }
+
+    kvmclock_struct_pa = env->system_time_msr & ~1ULL;
+    cpu_physical_memory_read(kvmclock_struct_pa, &time, sizeof(time));
+
+    assert(time.tsc_timestamp <= migration_tsc);
+    delta = migration_tsc - time.tsc_timestamp;
+    if (time.tsc_shift < 0) {
+        delta >>= -time.tsc_shift;
+    } else {
+        delta <<= time.tsc_shift;
+    }
+
+    mulu64(&nsec_lo, &nsec_hi, delta, time.tsc_to_system_mul);
+    nsec = (nsec_lo >> 32) | (nsec_hi << 32);
+    return nsec + time.system_time;
+}
+
+static void kvm_update_clock(KVMClockState *s)
+{
+    struct kvm_clock_data data;
+    int ret;
+
+    ret = kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, &data);
+    if (ret < 0) {
+        fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(-ret));
+                abort();
+    }
+    s->clock = data.clock;
+
+    /* If kvm_has_adjust_clock_stable() is false, KVM_GET_CLOCK returns
+     * essentially CLOCK_MONOTONIC plus a guest-specific adjustment.  This
+     * can drift from the TSC-based value that is computed by the guest,
+     * so we need to go through kvmclock_current_nsec().  If
+     * kvm_has_adjust_clock_stable() is true, and the flags contain
+     * KVM_CLOCK_TSC_STABLE, then KVM_GET_CLOCK returns a TSC-based value
+     * and kvmclock_current_nsec() is not necessary.
+     *
+     * Here, however, we need not check KVM_CLOCK_TSC_STABLE.  This is because:
+     *
+     * - if the host has disabled the kvmclock master clock, the guest already
+     *   has protection against time going backwards.  This "safety net" is only
+     *   absent when kvmclock is stable;
+     *
+     * - therefore, we can replace a check like
+     *
+     *       if last KVM_GET_CLOCK was not reliable then
+     *               read from memory
+     *
+     *   with
+     *
+     *       if last KVM_GET_CLOCK was not reliable && masterclock is enabled
+     *               read from memory
+     *
+     * However:
+     *
+     * - if kvm_has_adjust_clock_stable() returns false, the left side is
+     *   always true (KVM_GET_CLOCK is never reliable), and the right side is
+     *   unknown (because we don't have data.flags).  We must assume it's true
+     *   and read from memory.
+     *
+     * - if kvm_has_adjust_clock_stable() returns true, the result of the &&
+     *   is always false (masterclock is enabled iff KVM_GET_CLOCK is reliable)
+     *
+     * So we can just use this instead:
+     *
+     *       if !kvm_has_adjust_clock_stable() then
+     *               read from memory
+     */
+    s->clock_is_reliable = kvm_has_adjust_clock_stable();
+}
+
+static void do_kvmclock_ctrl(CPUState *cpu, run_on_cpu_data data)
+{
+    int ret = kvm_vcpu_ioctl(cpu, KVM_KVMCLOCK_CTRL, 0);
+
+    if (ret && ret != -EINVAL) {
+        fprintf(stderr, "%s: %s\n", __func__, strerror(-ret));
+    }
+}
+
+static void kvmclock_vm_state_change(void *opaque, bool running,
+                                     RunState state)
+{
+    KVMClockState *s = opaque;
+    CPUState *cpu;
+    int cap_clock_ctrl = kvm_check_extension(kvm_state, KVM_CAP_KVMCLOCK_CTRL);
+    int ret;
+
+    if (running) {
+        struct kvm_clock_data data = {};
+
+        /*
+         * If the host where s->clock was read did not support reliable
+         * KVM_GET_CLOCK, read kvmclock value from memory.
+         */
+        if (!s->clock_is_reliable) {
+            uint64_t pvclock_via_mem = kvmclock_current_nsec(s);
+            /* We can't rely on the saved clock value, just discard it */
+            if (pvclock_via_mem) {
+                s->clock = pvclock_via_mem;
+            }
+        }
+
+        s->clock_valid = false;
+
+        data.clock = s->clock;
+        ret = kvm_vm_ioctl(kvm_state, KVM_SET_CLOCK, &data);
+        if (ret < 0) {
+            fprintf(stderr, "KVM_SET_CLOCK failed: %s\n", strerror(-ret));
+            abort();
+        }
+
+        if (!cap_clock_ctrl) {
+            return;
+        }
+        CPU_FOREACH(cpu) {
+            run_on_cpu(cpu, do_kvmclock_ctrl, RUN_ON_CPU_NULL);
+        }
+    } else {
+
+        if (s->clock_valid) {
+            return;
+        }
+
+        s->runstate_paused = runstate_check(RUN_STATE_PAUSED);
+
+        kvm_synchronize_all_tsc();
+
+        kvm_update_clock(s);
+        /*
+         * If the VM is stopped, declare the clock state valid to
+         * avoid re-reading it on next vmsave (which would return
+         * a different value). Will be reset when the VM is continued.
+         */
+        s->clock_valid = true;
+    }
+}
+
+static void kvmclock_realize(DeviceState *dev, Error **errp)
+{
+    KVMClockState *s = KVM_CLOCK(dev);
+
+    if (!kvm_enabled()) {
+        error_setg(errp, "kvmclock device requires KVM");
+        return;
+    }
+
+    kvm_update_clock(s);
+
+    qemu_add_vm_change_state_handler(kvmclock_vm_state_change, s);
+}
+
+static bool kvmclock_clock_is_reliable_needed(void *opaque)
+{
+    KVMClockState *s = opaque;
+
+    return s->mach_use_reliable_get_clock;
+}
+
+static const VMStateDescription kvmclock_reliable_get_clock = {
+    .name = "kvmclock/clock_is_reliable",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = kvmclock_clock_is_reliable_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_BOOL(clock_is_reliable, KVMClockState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+/*
+ * When migrating, assume the source has an unreliable
+ * KVM_GET_CLOCK unless told otherwise.
+ */
+static int kvmclock_pre_load(void *opaque)
+{
+    KVMClockState *s = opaque;
+
+    s->clock_is_reliable = false;
+
+    return 0;
+}
+
+/*
+ * When migrating a running guest, read the clock just
+ * before migration, so that the guest clock counts
+ * during the events between:
+ *
+ *  * vm_stop()
+ *  *
+ *  * pre_save()
+ *
+ *  This reduces kvmclock difference on migration from 5s
+ *  to 0.1s (when max_downtime == 5s), because sending the
+ *  final pages of memory (which happens between vm_stop()
+ *  and pre_save()) takes max_downtime.
+ */
+static int kvmclock_pre_save(void *opaque)
+{
+    KVMClockState *s = opaque;
+
+    if (!s->runstate_paused) {
+        kvm_update_clock(s);
+    }
+
+    return 0;
+}
+
+static const VMStateDescription kvmclock_vmsd = {
+    .name = "kvmclock",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .pre_load = kvmclock_pre_load,
+    .pre_save = kvmclock_pre_save,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT64(clock, KVMClockState),
+        VMSTATE_END_OF_LIST()
+    },
+    .subsections = (const VMStateDescription * []) {
+        &kvmclock_reliable_get_clock,
+        NULL
+    }
+};
+
+static Property kvmclock_properties[] = {
+    DEFINE_PROP_BOOL("x-mach-use-reliable-get-clock", KVMClockState,
+                      mach_use_reliable_get_clock, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void kvmclock_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = kvmclock_realize;
+    dc->vmsd = &kvmclock_vmsd;
+    device_class_set_props(dc, kvmclock_properties);
+}
+
+static const TypeInfo kvmclock_info = {
+    .name          = TYPE_KVM_CLOCK,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(KVMClockState),
+    .class_init    = kvmclock_class_init,
+};
+
+/* Note: Must be called after VCPU initialization. */
+void kvmclock_create(bool create_always)
+{
+    X86CPU *cpu = X86_CPU(first_cpu);
+
+    if (!kvm_enabled() || !kvm_has_adjust_clock())
+        return;
+
+    if (create_always ||
+        cpu->env.features[FEAT_KVM] & ((1ULL << KVM_FEATURE_CLOCKSOURCE) |
+                                       (1ULL << KVM_FEATURE_CLOCKSOURCE2))) {
+        sysbus_create_simple(TYPE_KVM_CLOCK, -1, NULL);
+    }
+}
+
+static void kvmclock_register_types(void)
+{
+    type_register_static(&kvmclock_info);
+}
+
+type_init(kvmclock_register_types)
diff --git a/hw/i386/kvm/i8254.c b/hw/i386/kvm/i8254.c
new file mode 100644
index 000000000..191a26fa5
--- /dev/null
+++ b/hw/i386/kvm/i8254.c
@@ -0,0 +1,337 @@
+/*
+ * KVM in-kernel PIT (i8254) support
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ * Copyright (c) 2012      Jan Kiszka, Siemens AG
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include <linux/kvm.h>
+#include "qapi/qapi-types-machine.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
+#include "qemu/timer.h"
+#include "sysemu/runstate.h"
+#include "hw/timer/i8254.h"
+#include "hw/timer/i8254_internal.h"
+#include "hw/qdev-properties-system.h"
+#include "sysemu/kvm.h"
+#include "qom/object.h"
+
+#define KVM_PIT_REINJECT_BIT 0
+
+#define CALIBRATION_ROUNDS   3
+
+typedef struct KVMPITClass KVMPITClass;
+typedef struct KVMPITState KVMPITState;
+DECLARE_OBJ_CHECKERS(KVMPITState, KVMPITClass,
+                     KVM_PIT, TYPE_KVM_I8254)
+
+struct KVMPITState {
+    PITCommonState parent_obj;
+
+    LostTickPolicy lost_tick_policy;
+    bool vm_stopped;
+    int64_t kernel_clock_offset;
+};
+
+struct KVMPITClass {
+    PITCommonClass parent_class;
+
+    DeviceRealize parent_realize;
+};
+
+static void kvm_pit_update_clock_offset(KVMPITState *s)
+{
+    int64_t offset, clock_offset;
+    struct timespec ts;
+    int i;
+
+    /*
+     * Measure the delta between CLOCK_MONOTONIC, the base used for
+     * kvm_pit_channel_state::count_load_time, and QEMU_CLOCK_VIRTUAL. Take the
+     * minimum of several samples to filter out scheduling noise.
+     */
+    clock_offset = INT64_MAX;
+    for (i = 0; i < CALIBRATION_ROUNDS; i++) {
+        offset = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+        clock_gettime(CLOCK_MONOTONIC, &ts);
+        offset -= ts.tv_nsec;
+        offset -= (int64_t)ts.tv_sec * 1000000000;
+        if (uabs64(offset) < uabs64(clock_offset)) {
+            clock_offset = offset;
+        }
+    }
+    s->kernel_clock_offset = clock_offset;
+}
+
+static void kvm_pit_get(PITCommonState *pit)
+{
+    KVMPITState *s = KVM_PIT(pit);
+    struct kvm_pit_state2 kpit;
+    struct kvm_pit_channel_state *kchan;
+    struct PITChannelState *sc;
+    int i, ret;
+
+    /* No need to re-read the state if VM is stopped. */
+    if (s->vm_stopped) {
+        return;
+    }
+
+    if (kvm_has_pit_state2()) {
+        ret = kvm_vm_ioctl(kvm_state, KVM_GET_PIT2, &kpit);
+        if (ret < 0) {
+            fprintf(stderr, "KVM_GET_PIT2 failed: %s\n", strerror(-ret));
+            abort();
+        }
+        pit->channels[0].irq_disabled = kpit.flags & KVM_PIT_FLAGS_HPET_LEGACY;
+    } else {
+        /*
+         * kvm_pit_state2 is superset of kvm_pit_state struct,
+         * so we can use it for KVM_GET_PIT as well.
+         */
+        ret = kvm_vm_ioctl(kvm_state, KVM_GET_PIT, &kpit);
+        if (ret < 0) {
+            fprintf(stderr, "KVM_GET_PIT failed: %s\n", strerror(-ret));
+            abort();
+        }
+    }
+    for (i = 0; i < 3; i++) {
+        kchan = &kpit.channels[i];
+        sc = &pit->channels[i];
+        sc->count = kchan->count;
+        sc->latched_count = kchan->latched_count;
+        sc->count_latched = kchan->count_latched;
+        sc->status_latched = kchan->status_latched;
+        sc->status = kchan->status;
+        sc->read_state = kchan->read_state;
+        sc->write_state = kchan->write_state;
+        sc->write_latch = kchan->write_latch;
+        sc->rw_mode = kchan->rw_mode;
+        sc->mode = kchan->mode;
+        sc->bcd = kchan->bcd;
+        sc->gate = kchan->gate;
+        sc->count_load_time = kchan->count_load_time + s->kernel_clock_offset;
+    }
+
+    sc = &pit->channels[0];
+    sc->next_transition_time =
+        pit_get_next_transition_time(sc, sc->count_load_time);
+}
+
+static void kvm_pit_put(PITCommonState *pit)
+{
+    KVMPITState *s = KVM_PIT(pit);
+    struct kvm_pit_state2 kpit = {};
+    struct kvm_pit_channel_state *kchan;
+    struct PITChannelState *sc;
+    int i, ret;
+
+    /* The offset keeps changing as long as the VM is stopped. */
+    if (s->vm_stopped) {
+        kvm_pit_update_clock_offset(s);
+    }
+
+    kpit.flags = pit->channels[0].irq_disabled ? KVM_PIT_FLAGS_HPET_LEGACY : 0;
+    for (i = 0; i < 3; i++) {
+        kchan = &kpit.channels[i];
+        sc = &pit->channels[i];
+        kchan->count = sc->count;
+        kchan->latched_count = sc->latched_count;
+        kchan->count_latched = sc->count_latched;
+        kchan->status_latched = sc->status_latched;
+        kchan->status = sc->status;
+        kchan->read_state = sc->read_state;
+        kchan->write_state = sc->write_state;
+        kchan->write_latch = sc->write_latch;
+        kchan->rw_mode = sc->rw_mode;
+        kchan->mode = sc->mode;
+        kchan->bcd = sc->bcd;
+        kchan->gate = sc->gate;
+        kchan->count_load_time = sc->count_load_time - s->kernel_clock_offset;
+    }
+
+    ret = kvm_vm_ioctl(kvm_state,
+                       kvm_has_pit_state2() ? KVM_SET_PIT2 : KVM_SET_PIT,
+                       &kpit);
+    if (ret < 0) {
+        fprintf(stderr, "%s failed: %s\n",
+                kvm_has_pit_state2() ? "KVM_SET_PIT2" : "KVM_SET_PIT",
+                strerror(-ret));
+        abort();
+    }
+}
+
+static void kvm_pit_set_gate(PITCommonState *s, PITChannelState *sc, int val)
+{
+    kvm_pit_get(s);
+
+    switch (sc->mode) {
+    default:
+    case 0:
+    case 4:
+        /* XXX: just disable/enable counting */
+        break;
+    case 1:
+    case 2:
+    case 3:
+    case 5:
+        if (sc->gate < val) {
+            /* restart counting on rising edge */
+            sc->count_load_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+        }
+        break;
+    }
+    sc->gate = val;
+
+    kvm_pit_put(s);
+}
+
+static void kvm_pit_get_channel_info(PITCommonState *s, PITChannelState *sc,
+                                     PITChannelInfo *info)
+{
+    kvm_pit_get(s);
+
+    pit_get_channel_info_common(s, sc, info);
+}
+
+static void kvm_pit_reset(DeviceState *dev)
+{
+    PITCommonState *s = PIT_COMMON(dev);
+
+    pit_reset_common(s);
+
+    kvm_pit_put(s);
+}
+
+static void kvm_pit_irq_control(void *opaque, int n, int enable)
+{
+    PITCommonState *pit = opaque;
+    PITChannelState *s = &pit->channels[0];
+
+    kvm_pit_get(pit);
+
+    s->irq_disabled = !enable;
+
+    kvm_pit_put(pit);
+}
+
+static void kvm_pit_vm_state_change(void *opaque, bool running,
+                                    RunState state)
+{
+    KVMPITState *s = opaque;
+
+    if (running) {
+        kvm_pit_update_clock_offset(s);
+        kvm_pit_put(PIT_COMMON(s));
+        s->vm_stopped = false;
+    } else {
+        kvm_pit_update_clock_offset(s);
+        kvm_pit_get(PIT_COMMON(s));
+        s->vm_stopped = true;
+    }
+}
+
+static void kvm_pit_realizefn(DeviceState *dev, Error **errp)
+{
+    PITCommonState *pit = PIT_COMMON(dev);
+    KVMPITClass *kpc = KVM_PIT_GET_CLASS(dev);
+    KVMPITState *s = KVM_PIT(pit);
+    struct kvm_pit_config config = {
+        .flags = 0,
+    };
+    int ret;
+
+    if (kvm_check_extension(kvm_state, KVM_CAP_PIT2)) {
+        ret = kvm_vm_ioctl(kvm_state, KVM_CREATE_PIT2, &config);
+    } else {
+        ret = kvm_vm_ioctl(kvm_state, KVM_CREATE_PIT);
+    }
+    if (ret < 0) {
+        error_setg(errp, "Create kernel PIC irqchip failed: %s",
+                   strerror(-ret));
+        return;
+    }
+    switch (s->lost_tick_policy) {
+    case LOST_TICK_POLICY_DELAY:
+        break; /* enabled by default */
+    case LOST_TICK_POLICY_DISCARD:
+        if (kvm_check_extension(kvm_state, KVM_CAP_REINJECT_CONTROL)) {
+            struct kvm_reinject_control control = { .pit_reinject = 0 };
+
+            ret = kvm_vm_ioctl(kvm_state, KVM_REINJECT_CONTROL, &control);
+            if (ret < 0) {
+                error_setg(errp,
+                           "Can't disable in-kernel PIT reinjection: %s",
+                           strerror(-ret));
+                return;
+            }
+        }
+        break;
+    default:
+        error_setg(errp, "Lost tick policy not supported.");
+        return;
+    }
+
+    memory_region_init_io(&pit->ioports, OBJECT(dev), NULL, NULL, "kvm-pit", 4);
+
+    qdev_init_gpio_in(dev, kvm_pit_irq_control, 1);
+
+    qemu_add_vm_change_state_handler(kvm_pit_vm_state_change, s);
+
+    kpc->parent_realize(dev, errp);
+}
+
+static Property kvm_pit_properties[] = {
+    DEFINE_PROP_UINT32("iobase", PITCommonState, iobase,  -1),
+    DEFINE_PROP_LOSTTICKPOLICY("lost_tick_policy", KVMPITState,
+                               lost_tick_policy, LOST_TICK_POLICY_DELAY),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void kvm_pit_class_init(ObjectClass *klass, void *data)
+{
+    KVMPITClass *kpc = KVM_PIT_CLASS(klass);
+    PITCommonClass *k = PIT_COMMON_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    device_class_set_parent_realize(dc, kvm_pit_realizefn,
+                                    &kpc->parent_realize);
+    k->set_channel_gate = kvm_pit_set_gate;
+    k->get_channel_info = kvm_pit_get_channel_info;
+    dc->reset = kvm_pit_reset;
+    device_class_set_props(dc, kvm_pit_properties);
+}
+
+static const TypeInfo kvm_pit_info = {
+    .name          = TYPE_KVM_I8254,
+    .parent        = TYPE_PIT_COMMON,
+    .instance_size = sizeof(KVMPITState),
+    .class_init = kvm_pit_class_init,
+    .class_size = sizeof(KVMPITClass),
+};
+
+static void kvm_pit_register(void)
+{
+    type_register_static(&kvm_pit_info);
+}
+
+type_init(kvm_pit_register)
diff --git a/hw/i386/kvm/i8259.c b/hw/i386/kvm/i8259.c
new file mode 100644
index 000000000..d61bae4dc
--- /dev/null
+++ b/hw/i386/kvm/i8259.c
@@ -0,0 +1,167 @@
+/*
+ * KVM in-kernel PIC (i8259) 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 "qemu/osdep.h"
+#include "hw/isa/i8259_internal.h"
+#include "hw/intc/i8259.h"
+#include "qemu/module.h"
+#include "hw/i386/apic_internal.h"
+#include "hw/irq.h"
+#include "sysemu/kvm.h"
+#include "qom/object.h"
+
+#define TYPE_KVM_I8259 "kvm-i8259"
+typedef struct KVMPICClass KVMPICClass;
+DECLARE_CLASS_CHECKERS(KVMPICClass, KVM_PIC,
+                       TYPE_KVM_I8259)
+
+/**
+ * KVMPICClass:
+ * @parent_realize: The parent's realizefn.
+ */
+struct KVMPICClass {
+    PICCommonClass parent_class;
+
+    DeviceRealize parent_realize;
+};
+
+static void kvm_pic_get(PICCommonState *s)
+{
+    struct kvm_irqchip chip;
+    struct kvm_pic_state *kpic;
+    int ret;
+
+    chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE;
+    ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
+    if (ret < 0) {
+        fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(-ret));
+        abort();
+    }
+
+    kpic = &chip.chip.pic;
+
+    s->last_irr = kpic->last_irr;
+    s->irr = kpic->irr;
+    s->imr = kpic->imr;
+    s->isr = kpic->isr;
+    s->priority_add = kpic->priority_add;
+    s->irq_base = kpic->irq_base;
+    s->read_reg_select = kpic->read_reg_select;
+    s->poll = kpic->poll;
+    s->special_mask = kpic->special_mask;
+    s->init_state = kpic->init_state;
+    s->auto_eoi = kpic->auto_eoi;
+    s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi;
+    s->special_fully_nested_mode = kpic->special_fully_nested_mode;
+    s->init4 = kpic->init4;
+    s->elcr = kpic->elcr;
+    s->elcr_mask = kpic->elcr_mask;
+}
+
+static void kvm_pic_put(PICCommonState *s)
+{
+    struct kvm_irqchip chip;
+    struct kvm_pic_state *kpic;
+    int ret;
+
+    chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE;
+
+    kpic = &chip.chip.pic;
+
+    kpic->last_irr = s->last_irr;
+    kpic->irr = s->irr;
+    kpic->imr = s->imr;
+    kpic->isr = s->isr;
+    kpic->priority_add = s->priority_add;
+    kpic->irq_base = s->irq_base;
+    kpic->read_reg_select = s->read_reg_select;
+    kpic->poll = s->poll;
+    kpic->special_mask = s->special_mask;
+    kpic->init_state = s->init_state;
+    kpic->auto_eoi = s->auto_eoi;
+    kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi;
+    kpic->special_fully_nested_mode = s->special_fully_nested_mode;
+    kpic->init4 = s->init4;
+    kpic->elcr = s->elcr;
+    kpic->elcr_mask = s->elcr_mask;
+
+    ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip);
+    if (ret < 0) {
+        fprintf(stderr, "KVM_SET_IRQCHIP failed: %s\n", strerror(-ret));
+        abort();
+    }
+}
+
+static void kvm_pic_reset(DeviceState *dev)
+{
+    PICCommonState *s = PIC_COMMON(dev);
+
+    s->elcr = 0;
+    pic_reset_common(s);
+
+    kvm_pic_put(s);
+}
+
+static void kvm_pic_set_irq(void *opaque, int irq, int level)
+{
+    int delivered;
+
+    pic_stat_update_irq(irq, level);
+    delivered = kvm_set_irq(kvm_state, irq, level);
+    apic_report_irq_delivered(delivered);
+}
+
+static void kvm_pic_realize(DeviceState *dev, Error **errp)
+{
+    PICCommonState *s = PIC_COMMON(dev);
+    KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev);
+
+    memory_region_init_io(&s->base_io, OBJECT(dev), NULL, NULL, "kvm-pic", 2);
+    memory_region_init_io(&s->elcr_io, OBJECT(dev), NULL, NULL, "kvm-elcr", 1);
+
+    kpc->parent_realize(dev, errp);
+}
+
+qemu_irq *kvm_i8259_init(ISABus *bus)
+{
+    i8259_init_chip(TYPE_KVM_I8259, bus, true);
+    i8259_init_chip(TYPE_KVM_I8259, bus, false);
+
+    return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS);
+}
+
+static void kvm_i8259_class_init(ObjectClass *klass, void *data)
+{
+    KVMPICClass *kpc = KVM_PIC_CLASS(klass);
+    PICCommonClass *k = PIC_COMMON_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->reset     = kvm_pic_reset;
+    device_class_set_parent_realize(dc, kvm_pic_realize, &kpc->parent_realize);
+    k->pre_save   = kvm_pic_get;
+    k->post_load  = kvm_pic_put;
+}
+
+static const TypeInfo kvm_i8259_info = {
+    .name = TYPE_KVM_I8259,
+    .parent = TYPE_PIC_COMMON,
+    .instance_size = sizeof(PICCommonState),
+    .class_init = kvm_i8259_class_init,
+    .class_size = sizeof(KVMPICClass),
+};
+
+static void kvm_pic_register_types(void)
+{
+    type_register_static(&kvm_i8259_info);
+}
+
+type_init(kvm_pic_register_types)
diff --git a/hw/i386/kvm/ioapic.c b/hw/i386/kvm/ioapic.c
new file mode 100644
index 000000000..ee7c8ef68
--- /dev/null
+++ b/hw/i386/kvm/ioapic.c
@@ -0,0 +1,165 @@
+/*
+ * KVM in-kernel IOPIC 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 "qemu/osdep.h"
+#include "monitor/monitor.h"
+#include "hw/i386/x86.h"
+#include "hw/qdev-properties.h"
+#include "hw/i386/ioapic_internal.h"
+#include "hw/i386/apic_internal.h"
+#include "sysemu/kvm.h"
+
+/* PC Utility function */
+void kvm_pc_setup_irq_routing(bool pci_enabled)
+{
+    KVMState *s = kvm_state;
+    int i;
+
+    assert(kvm_has_gsi_routing());
+    for (i = 0; i < 8; ++i) {
+        if (i == 2) {
+            continue;
+        }
+        kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i);
+    }
+    for (i = 8; i < 16; ++i) {
+        kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8);
+    }
+    if (pci_enabled) {
+        for (i = 0; i < 24; ++i) {
+            if (i == 0) {
+                kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2);
+            } else if (i != 2) {
+                kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i);
+            }
+        }
+    }
+    kvm_irqchip_commit_routes(s);
+}
+
+typedef struct KVMIOAPICState KVMIOAPICState;
+
+struct KVMIOAPICState {
+    IOAPICCommonState ioapic;
+    uint32_t kvm_gsi_base;
+};
+
+static void kvm_ioapic_get(IOAPICCommonState *s)
+{
+    struct kvm_irqchip chip;
+    struct kvm_ioapic_state *kioapic;
+    int ret, i;
+
+    chip.chip_id = KVM_IRQCHIP_IOAPIC;
+    ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
+    if (ret < 0) {
+        fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(-ret));
+        abort();
+    }
+
+    kioapic = &chip.chip.ioapic;
+
+    s->id = kioapic->id;
+    s->ioregsel = kioapic->ioregsel;
+    s->irr = kioapic->irr;
+    for (i = 0; i < IOAPIC_NUM_PINS; i++) {
+        s->ioredtbl[i] = kioapic->redirtbl[i].bits;
+    }
+}
+
+static void kvm_ioapic_put(IOAPICCommonState *s)
+{
+    struct kvm_irqchip chip;
+    struct kvm_ioapic_state *kioapic;
+    int ret, i;
+
+    chip.chip_id = KVM_IRQCHIP_IOAPIC;
+    kioapic = &chip.chip.ioapic;
+
+    kioapic->id = s->id;
+    kioapic->ioregsel = s->ioregsel;
+    kioapic->base_address = s->busdev.mmio[0].addr;
+    kioapic->irr = s->irr;
+    for (i = 0; i < IOAPIC_NUM_PINS; i++) {
+        kioapic->redirtbl[i].bits = s->ioredtbl[i];
+    }
+
+    ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip);
+    if (ret < 0) {
+        fprintf(stderr, "KVM_SET_IRQCHIP failed: %s\n", strerror(-ret));
+        abort();
+    }
+}
+
+static void kvm_ioapic_reset(DeviceState *dev)
+{
+    IOAPICCommonState *s = IOAPIC_COMMON(dev);
+
+    ioapic_reset_common(dev);
+    kvm_ioapic_put(s);
+}
+
+static void kvm_ioapic_set_irq(void *opaque, int irq, int level)
+{
+    KVMIOAPICState *s = opaque;
+    IOAPICCommonState *common = IOAPIC_COMMON(s);
+    int delivered;
+
+    ioapic_stat_update_irq(common, irq, level);
+    delivered = kvm_set_irq(kvm_state, s->kvm_gsi_base + irq, level);
+    apic_report_irq_delivered(delivered);
+}
+
+static void kvm_ioapic_realize(DeviceState *dev, Error **errp)
+{
+    IOAPICCommonState *s = IOAPIC_COMMON(dev);
+
+    memory_region_init_io(&s->io_memory, OBJECT(dev), NULL, NULL, "kvm-ioapic", 0x1000);
+    /*
+     * KVM ioapic only supports 0x11 now. This will only be used when
+     * we want to dump ioapic version.
+     */
+    s->version = 0x11;
+
+    qdev_init_gpio_in(dev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS);
+}
+
+static Property kvm_ioapic_properties[] = {
+    DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
+    DEFINE_PROP_END_OF_LIST()
+};
+
+static void kvm_ioapic_class_init(ObjectClass *klass, void *data)
+{
+    IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    k->realize   = kvm_ioapic_realize;
+    k->pre_save  = kvm_ioapic_get;
+    k->post_load = kvm_ioapic_put;
+    dc->reset    = kvm_ioapic_reset;
+    device_class_set_props(dc, kvm_ioapic_properties);
+}
+
+static const TypeInfo kvm_ioapic_info = {
+    .name  = TYPE_KVM_IOAPIC,
+    .parent = TYPE_IOAPIC_COMMON,
+    .instance_size = sizeof(KVMIOAPICState),
+    .class_init = kvm_ioapic_class_init,
+};
+
+static void kvm_ioapic_register_types(void)
+{
+    type_register_static(&kvm_ioapic_info);
+}
+
+type_init(kvm_ioapic_register_types)
diff --git a/hw/i386/kvm/meson.build b/hw/i386/kvm/meson.build
new file mode 100644
index 000000000..95467f1de
--- /dev/null
+++ b/hw/i386/kvm/meson.build
@@ -0,0 +1,8 @@
+i386_kvm_ss = ss.source_set()
+i386_kvm_ss.add(files('clock.c'))
+i386_kvm_ss.add(when: 'CONFIG_APIC', if_true: files('apic.c'))
+i386_kvm_ss.add(when: 'CONFIG_I8254', if_true: files('i8254.c'))
+i386_kvm_ss.add(when: 'CONFIG_I8259', if_true: files('i8259.c'))
+i386_kvm_ss.add(when: 'CONFIG_IOAPIC', if_true: files('ioapic.c'))
+
+i386_ss.add_all(when: 'CONFIG_KVM', if_true: i386_kvm_ss)