accel: move kvm related accelerator files into accel/

move kvm related accelerator files into accel/ subdirectory, also
create one stub subdirectory, which will include accelerator's stub
files.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <1496383606-18060-5-git-send-email-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 2633 deletions

diff --git a/kvm-all.c b/kvm-all.c
deleted file mode 100644
index 98ad151375..0000000000
--- a/kvm-all.c
+++ /dev/null
@@ -1,2633 +0,0 @@
-/*
- * QEMU KVM support
- *
- * Copyright IBM, Corp. 2008
- *           Red Hat, Inc. 2008
- *
- * Authors:
- *  Anthony Liguori   <aliguori@us.ibm.com>
- *  Glauber Costa     <gcosta@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
-
-#include "qemu/osdep.h"
-#include <sys/ioctl.h>
-
-#include <linux/kvm.h>
-
-#include "qemu-common.h"
-#include "qemu/atomic.h"
-#include "qemu/option.h"
-#include "qemu/config-file.h"
-#include "qemu/error-report.h"
-#include "qapi/error.h"
-#include "hw/hw.h"
-#include "hw/pci/msi.h"
-#include "hw/pci/msix.h"
-#include "hw/s390x/adapter.h"
-#include "exec/gdbstub.h"
-#include "sysemu/kvm_int.h"
-#include "sysemu/cpus.h"
-#include "qemu/bswap.h"
-#include "exec/memory.h"
-#include "exec/ram_addr.h"
-#include "exec/address-spaces.h"
-#include "qemu/event_notifier.h"
-#include "trace-root.h"
-#include "hw/irq.h"
-
-#include "hw/boards.h"
-
-/* This check must be after config-host.h is included */
-#ifdef CONFIG_EVENTFD
-#include <sys/eventfd.h>
-#endif
-
-/* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We
- * need to use the real host PAGE_SIZE, as that's what KVM will use.
- */
-#define PAGE_SIZE getpagesize()
-
-//#define DEBUG_KVM
-
-#ifdef DEBUG_KVM
-#define DPRINTF(fmt, ...) \
-    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
-#else
-#define DPRINTF(fmt, ...) \
-    do { } while (0)
-#endif
-
-#define KVM_MSI_HASHTAB_SIZE    256
-
-struct KVMParkedVcpu {
-    unsigned long vcpu_id;
-    int kvm_fd;
-    QLIST_ENTRY(KVMParkedVcpu) node;
-};
-
-struct KVMState
-{
-    AccelState parent_obj;
-
-    int nr_slots;
-    int fd;
-    int vmfd;
-    int coalesced_mmio;
-    struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
-    bool coalesced_flush_in_progress;
-    int broken_set_mem_region;
-    int vcpu_events;
-    int robust_singlestep;
-    int debugregs;
-#ifdef KVM_CAP_SET_GUEST_DEBUG
-    struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
-#endif
-    int many_ioeventfds;
-    int intx_set_mask;
-    /* The man page (and posix) say ioctl numbers are signed int, but
-     * they're not.  Linux, glibc and *BSD all treat ioctl numbers as
-     * unsigned, and treating them as signed here can break things */
-    unsigned irq_set_ioctl;
-    unsigned int sigmask_len;
-    GHashTable *gsimap;
-#ifdef KVM_CAP_IRQ_ROUTING
-    struct kvm_irq_routing *irq_routes;
-    int nr_allocated_irq_routes;
-    unsigned long *used_gsi_bitmap;
-    unsigned int gsi_count;
-    QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE];
-#endif
-    KVMMemoryListener memory_listener;
-    QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
-};
-
-KVMState *kvm_state;
-bool kvm_kernel_irqchip;
-bool kvm_split_irqchip;
-bool kvm_async_interrupts_allowed;
-bool kvm_halt_in_kernel_allowed;
-bool kvm_eventfds_allowed;
-bool kvm_irqfds_allowed;
-bool kvm_resamplefds_allowed;
-bool kvm_msi_via_irqfd_allowed;
-bool kvm_gsi_routing_allowed;
-bool kvm_gsi_direct_mapping;
-bool kvm_allowed;
-bool kvm_readonly_mem_allowed;
-bool kvm_vm_attributes_allowed;
-bool kvm_direct_msi_allowed;
-bool kvm_ioeventfd_any_length_allowed;
-bool kvm_msi_use_devid;
-static bool kvm_immediate_exit;
-
-static const KVMCapabilityInfo kvm_required_capabilites[] = {
-    KVM_CAP_INFO(USER_MEMORY),
-    KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS),
-    KVM_CAP_LAST_INFO
-};
-
-int kvm_get_max_memslots(void)
-{
-    KVMState *s = KVM_STATE(current_machine->accelerator);
-
-    return s->nr_slots;
-}
-
-static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
-{
-    KVMState *s = kvm_state;
-    int i;
-
-    for (i = 0; i < s->nr_slots; i++) {
-        if (kml->slots[i].memory_size == 0) {
-            return &kml->slots[i];
-        }
-    }
-
-    return NULL;
-}
-
-bool kvm_has_free_slot(MachineState *ms)
-{
-    KVMState *s = KVM_STATE(ms->accelerator);
-
-    return kvm_get_free_slot(&s->memory_listener);
-}
-
-static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml)
-{
-    KVMSlot *slot = kvm_get_free_slot(kml);
-
-    if (slot) {
-        return slot;
-    }
-
-    fprintf(stderr, "%s: no free slot available\n", __func__);
-    abort();
-}
-
-static KVMSlot *kvm_lookup_matching_slot(KVMMemoryListener *kml,
-                                         hwaddr start_addr,
-                                         hwaddr end_addr)
-{
-    KVMState *s = kvm_state;
-    int i;
-
-    for (i = 0; i < s->nr_slots; i++) {
-        KVMSlot *mem = &kml->slots[i];
-
-        if (start_addr == mem->start_addr &&
-            end_addr == mem->start_addr + mem->memory_size) {
-            return mem;
-        }
-    }
-
-    return NULL;
-}
-
-/*
- * Find overlapping slot with lowest start address
- */
-static KVMSlot *kvm_lookup_overlapping_slot(KVMMemoryListener *kml,
-                                            hwaddr start_addr,
-                                            hwaddr end_addr)
-{
-    KVMState *s = kvm_state;
-    KVMSlot *found = NULL;
-    int i;
-
-    for (i = 0; i < s->nr_slots; i++) {
-        KVMSlot *mem = &kml->slots[i];
-
-        if (mem->memory_size == 0 ||
-            (found && found->start_addr < mem->start_addr)) {
-            continue;
-        }
-
-        if (end_addr > mem->start_addr &&
-            start_addr < mem->start_addr + mem->memory_size) {
-            found = mem;
-        }
-    }
-
-    return found;
-}
-
-int kvm_physical_memory_addr_from_host(KVMState *s, void *ram,
-                                       hwaddr *phys_addr)
-{
-    KVMMemoryListener *kml = &s->memory_listener;
-    int i;
-
-    for (i = 0; i < s->nr_slots; i++) {
-        KVMSlot *mem = &kml->slots[i];
-
-        if (ram >= mem->ram && ram < mem->ram + mem->memory_size) {
-            *phys_addr = mem->start_addr + (ram - mem->ram);
-            return 1;
-        }
-    }
-
-    return 0;
-}
-
-static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot)
-{
-    KVMState *s = kvm_state;
-    struct kvm_userspace_memory_region mem;
-
-    mem.slot = slot->slot | (kml->as_id << 16);
-    mem.guest_phys_addr = slot->start_addr;
-    mem.userspace_addr = (unsigned long)slot->ram;
-    mem.flags = slot->flags;
-
-    if (slot->memory_size && mem.flags & KVM_MEM_READONLY) {
-        /* Set the slot size to 0 before setting the slot to the desired
-         * value. This is needed based on KVM commit 75d61fbc. */
-        mem.memory_size = 0;
-        kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
-    }
-    mem.memory_size = slot->memory_size;
-    return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
-}
-
-int kvm_destroy_vcpu(CPUState *cpu)
-{
-    KVMState *s = kvm_state;
-    long mmap_size;
-    struct KVMParkedVcpu *vcpu = NULL;
-    int ret = 0;
-
-    DPRINTF("kvm_destroy_vcpu\n");
-
-    mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
-    if (mmap_size < 0) {
-        ret = mmap_size;
-        DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
-        goto err;
-    }
-
-    ret = munmap(cpu->kvm_run, mmap_size);
-    if (ret < 0) {
-        goto err;
-    }
-
-    vcpu = g_malloc0(sizeof(*vcpu));
-    vcpu->vcpu_id = kvm_arch_vcpu_id(cpu);
-    vcpu->kvm_fd = cpu->kvm_fd;
-    QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node);
-err:
-    return ret;
-}
-
-static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id)
-{
-    struct KVMParkedVcpu *cpu;
-
-    QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) {
-        if (cpu->vcpu_id == vcpu_id) {
-            int kvm_fd;
-
-            QLIST_REMOVE(cpu, node);
-            kvm_fd = cpu->kvm_fd;
-            g_free(cpu);
-            return kvm_fd;
-        }
-    }
-
-    return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id);
-}
-
-int kvm_init_vcpu(CPUState *cpu)
-{
-    KVMState *s = kvm_state;
-    long mmap_size;
-    int ret;
-
-    DPRINTF("kvm_init_vcpu\n");
-
-    ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu));
-    if (ret < 0) {
-        DPRINTF("kvm_create_vcpu failed\n");
-        goto err;
-    }
-
-    cpu->kvm_fd = ret;
-    cpu->kvm_state = s;
-    cpu->kvm_vcpu_dirty = true;
-
-    mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
-    if (mmap_size < 0) {
-        ret = mmap_size;
-        DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
-        goto err;
-    }
-
-    cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
-                        cpu->kvm_fd, 0);
-    if (cpu->kvm_run == MAP_FAILED) {
-        ret = -errno;
-        DPRINTF("mmap'ing vcpu state failed\n");
-        goto err;
-    }
-
-    if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
-        s->coalesced_mmio_ring =
-            (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE;
-    }
-
-    ret = kvm_arch_init_vcpu(cpu);
-err:
-    return ret;
-}
-
-/*
- * dirty pages logging control
- */
-
-static int kvm_mem_flags(MemoryRegion *mr)
-{
-    bool readonly = mr->readonly || memory_region_is_romd(mr);
-    int flags = 0;
-
-    if (memory_region_get_dirty_log_mask(mr) != 0) {
-        flags |= KVM_MEM_LOG_DIRTY_PAGES;
-    }
-    if (readonly && kvm_readonly_mem_allowed) {
-        flags |= KVM_MEM_READONLY;
-    }
-    return flags;
-}
-
-static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem,
-                                 MemoryRegion *mr)
-{
-    int old_flags;
-
-    old_flags = mem->flags;
-    mem->flags = kvm_mem_flags(mr);
-
-    /* If nothing changed effectively, no need to issue ioctl */
-    if (mem->flags == old_flags) {
-        return 0;
-    }
-
-    return kvm_set_user_memory_region(kml, mem);
-}
-
-static int kvm_section_update_flags(KVMMemoryListener *kml,
-                                    MemoryRegionSection *section)
-{
-    hwaddr phys_addr = section->offset_within_address_space;
-    ram_addr_t size = int128_get64(section->size);
-    KVMSlot *mem = kvm_lookup_matching_slot(kml, phys_addr, phys_addr + size);
-
-    if (mem == NULL)  {
-        return 0;
-    } else {
-        return kvm_slot_update_flags(kml, mem, section->mr);
-    }
-}
-
-static void kvm_log_start(MemoryListener *listener,
-                          MemoryRegionSection *section,
-                          int old, int new)
-{
-    KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
-    int r;
-
-    if (old != 0) {
-        return;
-    }
-
-    r = kvm_section_update_flags(kml, section);
-    if (r < 0) {
-        abort();
-    }
-}
-
-static void kvm_log_stop(MemoryListener *listener,
-                          MemoryRegionSection *section,
-                          int old, int new)
-{
-    KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
-    int r;
-
-    if (new != 0) {
-        return;
-    }
-
-    r = kvm_section_update_flags(kml, section);
-    if (r < 0) {
-        abort();
-    }
-}
-
-/* get kvm's dirty pages bitmap and update qemu's */
-static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
-                                         unsigned long *bitmap)
-{
-    ram_addr_t start = section->offset_within_region +
-                       memory_region_get_ram_addr(section->mr);
-    ram_addr_t pages = int128_get64(section->size) / getpagesize();
-
-    cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages);
-    return 0;
-}
-
-#define ALIGN(x, y)  (((x)+(y)-1) & ~((y)-1))
-
-/**
- * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
- * This function updates qemu's dirty bitmap using
- * memory_region_set_dirty().  This means all bits are set
- * to dirty.
- *
- * @start_add: start of logged region.
- * @end_addr: end of logged region.
- */
-static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml,
-                                          MemoryRegionSection *section)
-{
-    KVMState *s = kvm_state;
-    unsigned long size, allocated_size = 0;
-    struct kvm_dirty_log d = {};
-    KVMSlot *mem;
-    int ret = 0;
-    hwaddr start_addr = section->offset_within_address_space;
-    hwaddr end_addr = start_addr + int128_get64(section->size);
-
-    d.dirty_bitmap = NULL;
-    while (start_addr < end_addr) {
-        mem = kvm_lookup_overlapping_slot(kml, start_addr, end_addr);
-        if (mem == NULL) {
-            break;
-        }
-
-        /* XXX bad kernel interface alert
-         * For dirty bitmap, kernel allocates array of size aligned to
-         * bits-per-long.  But for case when the kernel is 64bits and
-         * the userspace is 32bits, userspace can't align to the same
-         * bits-per-long, since sizeof(long) is different between kernel
-         * and user space.  This way, userspace will provide buffer which
-         * may be 4 bytes less than the kernel will use, resulting in
-         * userspace memory corruption (which is not detectable by valgrind
-         * too, in most cases).
-         * So for now, let's align to 64 instead of HOST_LONG_BITS here, in
-         * a hope that sizeof(long) won't become >8 any time soon.
-         */
-        size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
-                     /*HOST_LONG_BITS*/ 64) / 8;
-        if (!d.dirty_bitmap) {
-            d.dirty_bitmap = g_malloc(size);
-        } else if (size > allocated_size) {
-            d.dirty_bitmap = g_realloc(d.dirty_bitmap, size);
-        }
-        allocated_size = size;
-        memset(d.dirty_bitmap, 0, allocated_size);
-
-        d.slot = mem->slot | (kml->as_id << 16);
-        if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
-            DPRINTF("ioctl failed %d\n", errno);
-            ret = -1;
-            break;
-        }
-
-        kvm_get_dirty_pages_log_range(section, d.dirty_bitmap);
-        start_addr = mem->start_addr + mem->memory_size;
-    }
-    g_free(d.dirty_bitmap);
-
-    return ret;
-}
-
-static void kvm_coalesce_mmio_region(MemoryListener *listener,
-                                     MemoryRegionSection *secion,
-                                     hwaddr start, hwaddr size)
-{
-    KVMState *s = kvm_state;
-
-    if (s->coalesced_mmio) {
-        struct kvm_coalesced_mmio_zone zone;
-
-        zone.addr = start;
-        zone.size = size;
-        zone.pad = 0;
-
-        (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
-    }
-}
-
-static void kvm_uncoalesce_mmio_region(MemoryListener *listener,
-                                       MemoryRegionSection *secion,
-                                       hwaddr start, hwaddr size)
-{
-    KVMState *s = kvm_state;
-
-    if (s->coalesced_mmio) {
-        struct kvm_coalesced_mmio_zone zone;
-
-        zone.addr = start;
-        zone.size = size;
-        zone.pad = 0;
-
-        (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
-    }
-}
-
-int kvm_check_extension(KVMState *s, unsigned int extension)
-{
-    int ret;
-
-    ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension);
-    if (ret < 0) {
-        ret = 0;
-    }
-
-    return ret;
-}
-
-int kvm_vm_check_extension(KVMState *s, unsigned int extension)
-{
-    int ret;
-
-    ret = kvm_vm_ioctl(s, KVM_CHECK_EXTENSION, extension);
-    if (ret < 0) {
-        /* VM wide version not implemented, use global one instead */
-        ret = kvm_check_extension(s, extension);
-    }
-
-    return ret;
-}
-
-static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size)
-{
-#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
-    /* The kernel expects ioeventfd values in HOST_WORDS_BIGENDIAN
-     * endianness, but the memory core hands them in target endianness.
-     * For example, PPC is always treated as big-endian even if running
-     * on KVM and on PPC64LE.  Correct here.
-     */
-    switch (size) {
-    case 2:
-        val = bswap16(val);
-        break;
-    case 4:
-        val = bswap32(val);
-        break;
-    }
-#endif
-    return val;
-}
-
-static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val,
-                                  bool assign, uint32_t size, bool datamatch)
-{
-    int ret;
-    struct kvm_ioeventfd iofd = {
-        .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0,
-        .addr = addr,
-        .len = size,
-        .flags = 0,
-        .fd = fd,
-    };
-
-    if (!kvm_enabled()) {
-        return -ENOSYS;
-    }
-
-    if (datamatch) {
-        iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH;
-    }
-    if (!assign) {
-        iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
-    }
-
-    ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd);
-
-    if (ret < 0) {
-        return -errno;
-    }
-
-    return 0;
-}
-
-static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val,
-                                 bool assign, uint32_t size, bool datamatch)
-{
-    struct kvm_ioeventfd kick = {
-        .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0,
-        .addr = addr,
-        .flags = KVM_IOEVENTFD_FLAG_PIO,
-        .len = size,
-        .fd = fd,
-    };
-    int r;
-    if (!kvm_enabled()) {
-        return -ENOSYS;
-    }
-    if (datamatch) {
-        kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH;
-    }
-    if (!assign) {
-        kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN;
-    }
-    r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
-    if (r < 0) {
-        return r;
-    }
-    return 0;
-}
-
-
-static int kvm_check_many_ioeventfds(void)
-{
-    /* Userspace can use ioeventfd for io notification.  This requires a host
-     * that supports eventfd(2) and an I/O thread; since eventfd does not
-     * support SIGIO it cannot interrupt the vcpu.
-     *
-     * Older kernels have a 6 device limit on the KVM io bus.  Find out so we
-     * can avoid creating too many ioeventfds.
-     */
-#if defined(CONFIG_EVENTFD)
-    int ioeventfds[7];
-    int i, ret = 0;
-    for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) {
-        ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
-        if (ioeventfds[i] < 0) {
-            break;
-        }
-        ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true);
-        if (ret < 0) {
-            close(ioeventfds[i]);
-            break;
-        }
-    }
-
-    /* Decide whether many devices are supported or not */
-    ret = i == ARRAY_SIZE(ioeventfds);
-
-    while (i-- > 0) {
-        kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true);
-        close(ioeventfds[i]);
-    }
-    return ret;
-#else
-    return 0;
-#endif
-}
-
-static const KVMCapabilityInfo *
-kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
-{
-    while (list->name) {
-        if (!kvm_check_extension(s, list->value)) {
-            return list;
-        }
-        list++;
-    }
-    return NULL;
-}
-
-static void kvm_set_phys_mem(KVMMemoryListener *kml,
-                             MemoryRegionSection *section, bool add)
-{
-    KVMState *s = kvm_state;
-    KVMSlot *mem, old;
-    int err;
-    MemoryRegion *mr = section->mr;
-    bool writeable = !mr->readonly && !mr->rom_device;
-    hwaddr start_addr = section->offset_within_address_space;
-    ram_addr_t size = int128_get64(section->size);
-    void *ram = NULL;
-    unsigned delta;
-
-    /* kvm works in page size chunks, but the function may be called
-       with sub-page size and unaligned start address. Pad the start
-       address to next and truncate size to previous page boundary. */
-    delta = qemu_real_host_page_size - (start_addr & ~qemu_real_host_page_mask);
-    delta &= ~qemu_real_host_page_mask;
-    if (delta > size) {
-        return;
-    }
-    start_addr += delta;
-    size -= delta;
-    size &= qemu_real_host_page_mask;
-    if (!size || (start_addr & ~qemu_real_host_page_mask)) {
-        return;
-    }
-
-    if (!memory_region_is_ram(mr)) {
-        if (writeable || !kvm_readonly_mem_allowed) {
-            return;
-        } else if (!mr->romd_mode) {
-            /* If the memory device is not in romd_mode, then we actually want
-             * to remove the kvm memory slot so all accesses will trap. */
-            add = false;
-        }
-    }
-
-    ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta;
-
-    while (1) {
-        mem = kvm_lookup_overlapping_slot(kml, start_addr, start_addr + size);
-        if (!mem) {
-            break;
-        }
-
-        if (add && start_addr >= mem->start_addr &&
-            (start_addr + size <= mem->start_addr + mem->memory_size) &&
-            (ram - start_addr == mem->ram - mem->start_addr)) {
-            /* The new slot fits into the existing one and comes with
-             * identical parameters - update flags and done. */
-            kvm_slot_update_flags(kml, mem, mr);
-            return;
-        }
-
-        old = *mem;
-
-        if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
-            kvm_physical_sync_dirty_bitmap(kml, section);
-        }
-
-        /* unregister the overlapping slot */
-        mem->memory_size = 0;
-        err = kvm_set_user_memory_region(kml, mem);
-        if (err) {
-            fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
-                    __func__, strerror(-err));
-            abort();
-        }
-
-        /* Workaround for older KVM versions: we can't join slots, even not by
-         * unregistering the previous ones and then registering the larger
-         * slot. We have to maintain the existing fragmentation. Sigh.
-         *
-         * This workaround assumes that the new slot starts at the same
-         * address as the first existing one. If not or if some overlapping
-         * slot comes around later, we will fail (not seen in practice so far)
-         * - and actually require a recent KVM version. */
-        if (s->broken_set_mem_region &&
-            old.start_addr == start_addr && old.memory_size < size && add) {
-            mem = kvm_alloc_slot(kml);
-            mem->memory_size = old.memory_size;
-            mem->start_addr = old.start_addr;
-            mem->ram = old.ram;
-            mem->flags = kvm_mem_flags(mr);
-
-            err = kvm_set_user_memory_region(kml, mem);
-            if (err) {
-                fprintf(stderr, "%s: error updating slot: %s\n", __func__,
-                        strerror(-err));
-                abort();
-            }
-
-            start_addr += old.memory_size;
-            ram += old.memory_size;
-            size -= old.memory_size;
-            continue;
-        }
-
-        /* register prefix slot */
-        if (old.start_addr < start_addr) {
-            mem = kvm_alloc_slot(kml);
-            mem->memory_size = start_addr - old.start_addr;
-            mem->start_addr = old.start_addr;
-            mem->ram = old.ram;
-            mem->flags =  kvm_mem_flags(mr);
-
-            err = kvm_set_user_memory_region(kml, mem);
-            if (err) {
-                fprintf(stderr, "%s: error registering prefix slot: %s\n",
-                        __func__, strerror(-err));
-#ifdef TARGET_PPC
-                fprintf(stderr, "%s: This is probably because your kernel's " \
-                                "PAGE_SIZE is too big. Please try to use 4k " \
-                                "PAGE_SIZE!\n", __func__);
-#endif
-                abort();
-            }
-        }
-
-        /* register suffix slot */
-        if (old.start_addr + old.memory_size > start_addr + size) {
-            ram_addr_t size_delta;
-
-            mem = kvm_alloc_slot(kml);
-            mem->start_addr = start_addr + size;
-            size_delta = mem->start_addr - old.start_addr;
-            mem->memory_size = old.memory_size - size_delta;
-            mem->ram = old.ram + size_delta;
-            mem->flags = kvm_mem_flags(mr);
-
-            err = kvm_set_user_memory_region(kml, mem);
-            if (err) {
-                fprintf(stderr, "%s: error registering suffix slot: %s\n",
-                        __func__, strerror(-err));
-                abort();
-            }
-        }
-    }
-
-    /* in case the KVM bug workaround already "consumed" the new slot */
-    if (!size) {
-        return;
-    }
-    if (!add) {
-        return;
-    }
-    mem = kvm_alloc_slot(kml);
-    mem->memory_size = size;
-    mem->start_addr = start_addr;
-    mem->ram = ram;
-    mem->flags = kvm_mem_flags(mr);
-
-    err = kvm_set_user_memory_region(kml, mem);
-    if (err) {
-        fprintf(stderr, "%s: error registering slot: %s\n", __func__,
-                strerror(-err));
-        abort();
-    }
-}
-
-static void kvm_region_add(MemoryListener *listener,
-                           MemoryRegionSection *section)
-{
-    KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
-
-    memory_region_ref(section->mr);
-    kvm_set_phys_mem(kml, section, true);
-}
-
-static void kvm_region_del(MemoryListener *listener,
-                           MemoryRegionSection *section)
-{
-    KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
-
-    kvm_set_phys_mem(kml, section, false);
-    memory_region_unref(section->mr);
-}
-
-static void kvm_log_sync(MemoryListener *listener,
-                         MemoryRegionSection *section)
-{
-    KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
-    int r;
-
-    r = kvm_physical_sync_dirty_bitmap(kml, section);
-    if (r < 0) {
-        abort();
-    }
-}
-
-static void kvm_mem_ioeventfd_add(MemoryListener *listener,
-                                  MemoryRegionSection *section,
-                                  bool match_data, uint64_t data,
-                                  EventNotifier *e)
-{
-    int fd = event_notifier_get_fd(e);
-    int r;
-
-    r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
-                               data, true, int128_get64(section->size),
-                               match_data);
-    if (r < 0) {
-        fprintf(stderr, "%s: error adding ioeventfd: %s\n",
-                __func__, strerror(-r));
-        abort();
-    }
-}
-
-static void kvm_mem_ioeventfd_del(MemoryListener *listener,
-                                  MemoryRegionSection *section,
-                                  bool match_data, uint64_t data,
-                                  EventNotifier *e)
-{
-    int fd = event_notifier_get_fd(e);
-    int r;
-
-    r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
-                               data, false, int128_get64(section->size),
-                               match_data);
-    if (r < 0) {
-        abort();
-    }
-}
-
-static void kvm_io_ioeventfd_add(MemoryListener *listener,
-                                 MemoryRegionSection *section,
-                                 bool match_data, uint64_t data,
-                                 EventNotifier *e)
-{
-    int fd = event_notifier_get_fd(e);
-    int r;
-
-    r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
-                              data, true, int128_get64(section->size),
-                              match_data);
-    if (r < 0) {
-        fprintf(stderr, "%s: error adding ioeventfd: %s\n",
-                __func__, strerror(-r));
-        abort();
-    }
-}
-
-static void kvm_io_ioeventfd_del(MemoryListener *listener,
-                                 MemoryRegionSection *section,
-                                 bool match_data, uint64_t data,
-                                 EventNotifier *e)
-
-{
-    int fd = event_notifier_get_fd(e);
-    int r;
-
-    r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
-                              data, false, int128_get64(section->size),
-                              match_data);
-    if (r < 0) {
-        abort();
-    }
-}
-
-void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
-                                  AddressSpace *as, int as_id)
-{
-    int i;
-
-    kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot));
-    kml->as_id = as_id;
-
-    for (i = 0; i < s->nr_slots; i++) {
-        kml->slots[i].slot = i;
-    }
-
-    kml->listener.region_add = kvm_region_add;
-    kml->listener.region_del = kvm_region_del;
-    kml->listener.log_start = kvm_log_start;
-    kml->listener.log_stop = kvm_log_stop;
-    kml->listener.log_sync = kvm_log_sync;
-    kml->listener.priority = 10;
-
-    memory_listener_register(&kml->listener, as);
-}
-
-static MemoryListener kvm_io_listener = {
-    .eventfd_add = kvm_io_ioeventfd_add,
-    .eventfd_del = kvm_io_ioeventfd_del,
-    .priority = 10,
-};
-
-static void kvm_handle_interrupt(CPUState *cpu, int mask)
-{
-    cpu->interrupt_request |= mask;
-
-    if (!qemu_cpu_is_self(cpu)) {
-        qemu_cpu_kick(cpu);
-    }
-}
-
-int kvm_set_irq(KVMState *s, int irq, int level)
-{
-    struct kvm_irq_level event;
-    int ret;
-
-    assert(kvm_async_interrupts_enabled());
-
-    event.level = level;
-    event.irq = irq;
-    ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event);
-    if (ret < 0) {
-        perror("kvm_set_irq");
-        abort();
-    }
-
-    return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status;
-}
-
-#ifdef KVM_CAP_IRQ_ROUTING
-typedef struct KVMMSIRoute {
-    struct kvm_irq_routing_entry kroute;
-    QTAILQ_ENTRY(KVMMSIRoute) entry;
-} KVMMSIRoute;
-
-static void set_gsi(KVMState *s, unsigned int gsi)
-{
-    set_bit(gsi, s->used_gsi_bitmap);
-}
-
-static void clear_gsi(KVMState *s, unsigned int gsi)
-{
-    clear_bit(gsi, s->used_gsi_bitmap);
-}
-
-void kvm_init_irq_routing(KVMState *s)
-{
-    int gsi_count, i;
-
-    gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING) - 1;
-    if (gsi_count > 0) {
-        /* Round up so we can search ints using ffs */
-        s->used_gsi_bitmap = bitmap_new(gsi_count);
-        s->gsi_count = gsi_count;
-    }
-
-    s->irq_routes = g_malloc0(sizeof(*s->irq_routes));
-    s->nr_allocated_irq_routes = 0;
-
-    if (!kvm_direct_msi_allowed) {
-        for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) {
-            QTAILQ_INIT(&s->msi_hashtab[i]);
-        }
-    }
-
-    kvm_arch_init_irq_routing(s);
-}
-
-void kvm_irqchip_commit_routes(KVMState *s)
-{
-    int ret;
-
-    if (kvm_gsi_direct_mapping()) {
-        return;
-    }
-
-    if (!kvm_gsi_routing_enabled()) {
-        return;
-    }
-
-    s->irq_routes->flags = 0;
-    trace_kvm_irqchip_commit_routes();
-    ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes);
-    assert(ret == 0);
-}
-
-static void kvm_add_routing_entry(KVMState *s,
-                                  struct kvm_irq_routing_entry *entry)
-{
-    struct kvm_irq_routing_entry *new;
-    int n, size;
-
-    if (s->irq_routes->nr == s->nr_allocated_irq_routes) {
-        n = s->nr_allocated_irq_routes * 2;
-        if (n < 64) {
-            n = 64;
-        }
-        size = sizeof(struct kvm_irq_routing);
-        size += n * sizeof(*new);
-        s->irq_routes = g_realloc(s->irq_routes, size);
-        s->nr_allocated_irq_routes = n;
-    }
-    n = s->irq_routes->nr++;
-    new = &s->irq_routes->entries[n];
-
-    *new = *entry;
-
-    set_gsi(s, entry->gsi);
-}
-
-static int kvm_update_routing_entry(KVMState *s,
-                                    struct kvm_irq_routing_entry *new_entry)
-{
-    struct kvm_irq_routing_entry *entry;
-    int n;
-
-    for (n = 0; n < s->irq_routes->nr; n++) {
-        entry = &s->irq_routes->entries[n];
-        if (entry->gsi != new_entry->gsi) {
-            continue;
-        }
-
-        if(!memcmp(entry, new_entry, sizeof *entry)) {
-            return 0;
-        }
-
-        *entry = *new_entry;
-
-        return 0;
-    }
-
-    return -ESRCH;
-}
-
-void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin)
-{
-    struct kvm_irq_routing_entry e = {};
-
-    assert(pin < s->gsi_count);
-
-    e.gsi = irq;
-    e.type = KVM_IRQ_ROUTING_IRQCHIP;
-    e.flags = 0;
-    e.u.irqchip.irqchip = irqchip;
-    e.u.irqchip.pin = pin;
-    kvm_add_routing_entry(s, &e);
-}
-
-void kvm_irqchip_release_virq(KVMState *s, int virq)
-{
-    struct kvm_irq_routing_entry *e;
-    int i;
-
-    if (kvm_gsi_direct_mapping()) {
-        return;
-    }
-
-    for (i = 0; i < s->irq_routes->nr; i++) {
-        e = &s->irq_routes->entries[i];
-        if (e->gsi == virq) {
-            s->irq_routes->nr--;
-            *e = s->irq_routes->entries[s->irq_routes->nr];
-        }
-    }
-    clear_gsi(s, virq);
-    kvm_arch_release_virq_post(virq);
-    trace_kvm_irqchip_release_virq(virq);
-}
-
-static unsigned int kvm_hash_msi(uint32_t data)
-{
-    /* This is optimized for IA32 MSI layout. However, no other arch shall
-     * repeat the mistake of not providing a direct MSI injection API. */
-    return data & 0xff;
-}
-
-static void kvm_flush_dynamic_msi_routes(KVMState *s)
-{
-    KVMMSIRoute *route, *next;
-    unsigned int hash;
-
-    for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) {
-        QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) {
-            kvm_irqchip_release_virq(s, route->kroute.gsi);
-            QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry);
-            g_free(route);
-        }
-    }
-}
-
-static int kvm_irqchip_get_virq(KVMState *s)
-{
-    int next_virq;
-
-    /*
-     * PIC and IOAPIC share the first 16 GSI numbers, thus the available
-     * GSI numbers are more than the number of IRQ route. Allocating a GSI
-     * number can succeed even though a new route entry cannot be added.
-     * When this happens, flush dynamic MSI entries to free IRQ route entries.
-     */
-    if (!kvm_direct_msi_allowed && s->irq_routes->nr == s->gsi_count) {
-        kvm_flush_dynamic_msi_routes(s);
-    }
-
-    /* Return the lowest unused GSI in the bitmap */
-    next_virq = find_first_zero_bit(s->used_gsi_bitmap, s->gsi_count);
-    if (next_virq >= s->gsi_count) {
-        return -ENOSPC;
-    } else {
-        return next_virq;
-    }
-}
-
-static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg)
-{
-    unsigned int hash = kvm_hash_msi(msg.data);
-    KVMMSIRoute *route;
-
-    QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) {
-        if (route->kroute.u.msi.address_lo == (uint32_t)msg.address &&
-            route->kroute.u.msi.address_hi == (msg.address >> 32) &&
-            route->kroute.u.msi.data == le32_to_cpu(msg.data)) {
-            return route;
-        }
-    }
-    return NULL;
-}
-
-int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
-{
-    struct kvm_msi msi;
-    KVMMSIRoute *route;
-
-    if (kvm_direct_msi_allowed) {
-        msi.address_lo = (uint32_t)msg.address;
-        msi.address_hi = msg.address >> 32;
-        msi.data = le32_to_cpu(msg.data);
-        msi.flags = 0;
-        memset(msi.pad, 0, sizeof(msi.pad));
-
-        return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi);
-    }
-
-    route = kvm_lookup_msi_route(s, msg);
-    if (!route) {
-        int virq;
-
-        virq = kvm_irqchip_get_virq(s);
-        if (virq < 0) {
-            return virq;
-        }
-
-        route = g_malloc0(sizeof(KVMMSIRoute));
-        route->kroute.gsi = virq;
-        route->kroute.type = KVM_IRQ_ROUTING_MSI;
-        route->kroute.flags = 0;
-        route->kroute.u.msi.address_lo = (uint32_t)msg.address;
-        route->kroute.u.msi.address_hi = msg.address >> 32;
-        route->kroute.u.msi.data = le32_to_cpu(msg.data);
-
-        kvm_add_routing_entry(s, &route->kroute);
-        kvm_irqchip_commit_routes(s);
-
-        QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route,
-                           entry);
-    }
-
-    assert(route->kroute.type == KVM_IRQ_ROUTING_MSI);
-
-    return kvm_set_irq(s, route->kroute.gsi, 1);
-}
-
-int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
-{
-    struct kvm_irq_routing_entry kroute = {};
-    int virq;
-    MSIMessage msg = {0, 0};
-
-    if (dev) {
-        msg = pci_get_msi_message(dev, vector);
-    }
-
-    if (kvm_gsi_direct_mapping()) {
-        return kvm_arch_msi_data_to_gsi(msg.data);
-    }
-
-    if (!kvm_gsi_routing_enabled()) {
-        return -ENOSYS;
-    }
-
-    virq = kvm_irqchip_get_virq(s);
-    if (virq < 0) {
-        return virq;
-    }
-
-    kroute.gsi = virq;
-    kroute.type = KVM_IRQ_ROUTING_MSI;
-    kroute.flags = 0;
-    kroute.u.msi.address_lo = (uint32_t)msg.address;
-    kroute.u.msi.address_hi = msg.address >> 32;
-    kroute.u.msi.data = le32_to_cpu(msg.data);
-    if (kvm_msi_devid_required()) {
-        kroute.flags = KVM_MSI_VALID_DEVID;
-        kroute.u.msi.devid = pci_requester_id(dev);
-    }
-    if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
-        kvm_irqchip_release_virq(s, virq);
-        return -EINVAL;
-    }
-
-    trace_kvm_irqchip_add_msi_route(dev ? dev->name : (char *)"N/A",
-                                    vector, virq);
-
-    kvm_add_routing_entry(s, &kroute);
-    kvm_arch_add_msi_route_post(&kroute, vector, dev);
-    kvm_irqchip_commit_routes(s);
-
-    return virq;
-}
-
-int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
-                                 PCIDevice *dev)
-{
-    struct kvm_irq_routing_entry kroute = {};
-
-    if (kvm_gsi_direct_mapping()) {
-        return 0;
-    }
-
-    if (!kvm_irqchip_in_kernel()) {
-        return -ENOSYS;
-    }
-
-    kroute.gsi = virq;
-    kroute.type = KVM_IRQ_ROUTING_MSI;
-    kroute.flags = 0;
-    kroute.u.msi.address_lo = (uint32_t)msg.address;
-    kroute.u.msi.address_hi = msg.address >> 32;
-    kroute.u.msi.data = le32_to_cpu(msg.data);
-    if (kvm_msi_devid_required()) {
-        kroute.flags = KVM_MSI_VALID_DEVID;
-        kroute.u.msi.devid = pci_requester_id(dev);
-    }
-    if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
-        return -EINVAL;
-    }
-
-    trace_kvm_irqchip_update_msi_route(virq);
-
-    return kvm_update_routing_entry(s, &kroute);
-}
-
-static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq,
-                                    bool assign)
-{
-    struct kvm_irqfd irqfd = {
-        .fd = fd,
-        .gsi = virq,
-        .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
-    };
-
-    if (rfd != -1) {
-        irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE;
-        irqfd.resamplefd = rfd;
-    }
-
-    if (!kvm_irqfds_enabled()) {
-        return -ENOSYS;
-    }
-
-    return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd);
-}
-
-int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
-{
-    struct kvm_irq_routing_entry kroute = {};
-    int virq;
-
-    if (!kvm_gsi_routing_enabled()) {
-        return -ENOSYS;
-    }
-
-    virq = kvm_irqchip_get_virq(s);
-    if (virq < 0) {
-        return virq;
-    }
-
-    kroute.gsi = virq;
-    kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER;
-    kroute.flags = 0;
-    kroute.u.adapter.summary_addr = adapter->summary_addr;
-    kroute.u.adapter.ind_addr = adapter->ind_addr;
-    kroute.u.adapter.summary_offset = adapter->summary_offset;
-    kroute.u.adapter.ind_offset = adapter->ind_offset;
-    kroute.u.adapter.adapter_id = adapter->adapter_id;
-
-    kvm_add_routing_entry(s, &kroute);
-
-    return virq;
-}
-
-int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
-{
-    struct kvm_irq_routing_entry kroute = {};
-    int virq;
-
-    if (!kvm_gsi_routing_enabled()) {
-        return -ENOSYS;
-    }
-    if (!kvm_check_extension(s, KVM_CAP_HYPERV_SYNIC)) {
-        return -ENOSYS;
-    }
-    virq = kvm_irqchip_get_virq(s);
-    if (virq < 0) {
-        return virq;
-    }
-
-    kroute.gsi = virq;
-    kroute.type = KVM_IRQ_ROUTING_HV_SINT;
-    kroute.flags = 0;
-    kroute.u.hv_sint.vcpu = vcpu;
-    kroute.u.hv_sint.sint = sint;
-
-    kvm_add_routing_entry(s, &kroute);
-    kvm_irqchip_commit_routes(s);
-
-    return virq;
-}
-
-#else /* !KVM_CAP_IRQ_ROUTING */
-
-void kvm_init_irq_routing(KVMState *s)
-{
-}
-
-void kvm_irqchip_release_virq(KVMState *s, int virq)
-{
-}
-
-int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
-{
-    abort();
-}
-
-int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
-{
-    return -ENOSYS;
-}
-
-int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
-{
-    return -ENOSYS;
-}
-
-int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
-{
-    return -ENOSYS;
-}
-
-static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
-{
-    abort();
-}
-
-int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
-{
-    return -ENOSYS;
-}
-#endif /* !KVM_CAP_IRQ_ROUTING */
-
-int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
-                                       EventNotifier *rn, int virq)
-{
-    return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n),
-           rn ? event_notifier_get_fd(rn) : -1, virq, true);
-}
-
-int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
-                                          int virq)
-{
-    return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq,
-           false);
-}
-
-int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
-                                   EventNotifier *rn, qemu_irq irq)
-{
-    gpointer key, gsi;
-    gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
-
-    if (!found) {
-        return -ENXIO;
-    }
-    return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi));
-}
-
-int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n,
-                                      qemu_irq irq)
-{
-    gpointer key, gsi;
-    gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
-
-    if (!found) {
-        return -ENXIO;
-    }
-    return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi));
-}
-
-void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi)
-{
-    g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi));
-}
-
-static void kvm_irqchip_create(MachineState *machine, KVMState *s)
-{
-    int ret;
-
-    if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
-        ;
-    } else if (kvm_check_extension(s, KVM_CAP_S390_IRQCHIP)) {
-        ret = kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0);
-        if (ret < 0) {
-            fprintf(stderr, "Enable kernel irqchip failed: %s\n", strerror(-ret));
-            exit(1);
-        }
-    } else {
-        return;
-    }
-
-    /* First probe and see if there's a arch-specific hook to create the
-     * in-kernel irqchip for us */
-    ret = kvm_arch_irqchip_create(machine, s);
-    if (ret == 0) {
-        if (machine_kernel_irqchip_split(machine)) {
-            perror("Split IRQ chip mode not supported.");
-            exit(1);
-        } else {
-            ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP);
-        }
-    }
-    if (ret < 0) {
-        fprintf(stderr, "Create kernel irqchip failed: %s\n", strerror(-ret));
-        exit(1);
-    }
-
-    kvm_kernel_irqchip = true;
-    /* If we have an in-kernel IRQ chip then we must have asynchronous
-     * interrupt delivery (though the reverse is not necessarily true)
-     */
-    kvm_async_interrupts_allowed = true;
-    kvm_halt_in_kernel_allowed = true;
-
-    kvm_init_irq_routing(s);
-
-    s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal);
-}
-
-/* Find number of supported CPUs using the recommended
- * procedure from the kernel API documentation to cope with
- * older kernels that may be missing capabilities.
- */
-static int kvm_recommended_vcpus(KVMState *s)
-{
-    int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
-    return (ret) ? ret : 4;
-}
-
-static int kvm_max_vcpus(KVMState *s)
-{
-    int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
-    return (ret) ? ret : kvm_recommended_vcpus(s);
-}
-
-static int kvm_max_vcpu_id(KVMState *s)
-{
-    int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID);
-    return (ret) ? ret : kvm_max_vcpus(s);
-}
-
-bool kvm_vcpu_id_is_valid(int vcpu_id)
-{
-    KVMState *s = KVM_STATE(current_machine->accelerator);
-    return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s);
-}
-
-static int kvm_init(MachineState *ms)
-{
-    MachineClass *mc = MACHINE_GET_CLASS(ms);
-    static const char upgrade_note[] =
-        "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
-        "(see http://sourceforge.net/projects/kvm).\n";
-    struct {
-        const char *name;
-        int num;
-    } num_cpus[] = {
-        { "SMP",          smp_cpus },
-        { "hotpluggable", max_cpus },
-        { NULL, }
-    }, *nc = num_cpus;
-    int soft_vcpus_limit, hard_vcpus_limit;
-    KVMState *s;
-    const KVMCapabilityInfo *missing_cap;
-    int ret;
-    int type = 0;
-    const char *kvm_type;
-
-    s = KVM_STATE(ms->accelerator);
-
-    /*
-     * On systems where the kernel can support different base page
-     * sizes, host page size may be different from TARGET_PAGE_SIZE,
-     * even with KVM.  TARGET_PAGE_SIZE is assumed to be the minimum
-     * page size for the system though.
-     */
-    assert(TARGET_PAGE_SIZE <= getpagesize());
-
-    s->sigmask_len = 8;
-
-#ifdef KVM_CAP_SET_GUEST_DEBUG
-    QTAILQ_INIT(&s->kvm_sw_breakpoints);
-#endif
-    QLIST_INIT(&s->kvm_parked_vcpus);
-    s->vmfd = -1;
-    s->fd = qemu_open("/dev/kvm", O_RDWR);
-    if (s->fd == -1) {
-        fprintf(stderr, "Could not access KVM kernel module: %m\n");
-        ret = -errno;
-        goto err;
-    }
-
-    ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
-    if (ret < KVM_API_VERSION) {
-        if (ret >= 0) {
-            ret = -EINVAL;
-        }
-        fprintf(stderr, "kvm version too old\n");
-        goto err;
-    }
-
-    if (ret > KVM_API_VERSION) {
-        ret = -EINVAL;
-        fprintf(stderr, "kvm version not supported\n");
-        goto err;
-    }
-
-    kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT);
-    s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
-
-    /* If unspecified, use the default value */
-    if (!s->nr_slots) {
-        s->nr_slots = 32;
-    }
-
-    /* check the vcpu limits */
-    soft_vcpus_limit = kvm_recommended_vcpus(s);
-    hard_vcpus_limit = kvm_max_vcpus(s);
-
-    while (nc->name) {
-        if (nc->num > soft_vcpus_limit) {
-            fprintf(stderr,
-                    "Warning: Number of %s cpus requested (%d) exceeds "
-                    "the recommended cpus supported by KVM (%d)\n",
-                    nc->name, nc->num, soft_vcpus_limit);
-
-            if (nc->num > hard_vcpus_limit) {
-                fprintf(stderr, "Number of %s cpus requested (%d) exceeds "
-                        "the maximum cpus supported by KVM (%d)\n",
-                        nc->name, nc->num, hard_vcpus_limit);
-                exit(1);
-            }
-        }
-        nc++;
-    }
-
-    kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type");
-    if (mc->kvm_type) {
-        type = mc->kvm_type(kvm_type);
-    } else if (kvm_type) {
-        ret = -EINVAL;
-        fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type);
-        goto err;
-    }
-
-    do {
-        ret = kvm_ioctl(s, KVM_CREATE_VM, type);
-    } while (ret == -EINTR);
-
-    if (ret < 0) {
-        fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret,
-                strerror(-ret));
-
-#ifdef TARGET_S390X
-        if (ret == -EINVAL) {
-            fprintf(stderr,
-                    "Host kernel setup problem detected. Please verify:\n");
-            fprintf(stderr, "- for kernels supporting the switch_amode or"
-                    " user_mode parameters, whether\n");
-            fprintf(stderr,
-                    "  user space is running in primary address space\n");
-            fprintf(stderr,
-                    "- for kernels supporting the vm.allocate_pgste sysctl, "
-                    "whether it is enabled\n");
-        }
-#endif
-        goto err;
-    }
-
-    s->vmfd = ret;
-    missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
-    if (!missing_cap) {
-        missing_cap =
-            kvm_check_extension_list(s, kvm_arch_required_capabilities);
-    }
-    if (missing_cap) {
-        ret = -EINVAL;
-        fprintf(stderr, "kvm does not support %s\n%s",
-                missing_cap->name, upgrade_note);
-        goto err;
-    }
-
-    s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
-
-    s->broken_set_mem_region = 1;
-    ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS);
-    if (ret > 0) {
-        s->broken_set_mem_region = 0;
-    }
-
-#ifdef KVM_CAP_VCPU_EVENTS
-    s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
-#endif
-
-    s->robust_singlestep =
-        kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP);
-
-#ifdef KVM_CAP_DEBUGREGS
-    s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
-#endif
-
-#ifdef KVM_CAP_IRQ_ROUTING
-    kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
-#endif
-
-    s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3);
-
-    s->irq_set_ioctl = KVM_IRQ_LINE;
-    if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
-        s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
-    }
-
-#ifdef KVM_CAP_READONLY_MEM
-    kvm_readonly_mem_allowed =
-        (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0);
-#endif
-
-    kvm_eventfds_allowed =
-        (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0);
-
-    kvm_irqfds_allowed =
-        (kvm_check_extension(s, KVM_CAP_IRQFD) > 0);
-
-    kvm_resamplefds_allowed =
-        (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0);
-
-    kvm_vm_attributes_allowed =
-        (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0);
-
-    kvm_ioeventfd_any_length_allowed =
-        (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0);
-
-    kvm_state = s;
-
-    ret = kvm_arch_init(ms, s);
-    if (ret < 0) {
-        goto err;
-    }
-
-    if (machine_kernel_irqchip_allowed(ms)) {
-        kvm_irqchip_create(ms, s);
-    }
-
-    if (kvm_eventfds_allowed) {
-        s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add;
-        s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del;
-    }
-    s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region;
-    s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region;
-
-    kvm_memory_listener_register(s, &s->memory_listener,
-                                 &address_space_memory, 0);
-    memory_listener_register(&kvm_io_listener,
-                             &address_space_io);
-
-    s->many_ioeventfds = kvm_check_many_ioeventfds();
-
-    cpu_interrupt_handler = kvm_handle_interrupt;
-
-    return 0;
-
-err:
-    assert(ret < 0);
-    if (s->vmfd >= 0) {
-        close(s->vmfd);
-    }
-    if (s->fd != -1) {
-        close(s->fd);
-    }
-    g_free(s->memory_listener.slots);
-
-    return ret;
-}
-
-void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len)
-{
-    s->sigmask_len = sigmask_len;
-}
-
-static void kvm_handle_io(uint16_t port, MemTxAttrs attrs, void *data, int direction,
-                          int size, uint32_t count)
-{
-    int i;
-    uint8_t *ptr = data;
-
-    for (i = 0; i < count; i++) {
-        address_space_rw(&address_space_io, port, attrs,
-                         ptr, size,
-                         direction == KVM_EXIT_IO_OUT);
-        ptr += size;
-    }
-}
-
-static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run)
-{
-    fprintf(stderr, "KVM internal error. Suberror: %d\n",
-            run->internal.suberror);
-
-    if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
-        int i;
-
-        for (i = 0; i < run->internal.ndata; ++i) {
-            fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
-                    i, (uint64_t)run->internal.data[i]);
-        }
-    }
-    if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
-        fprintf(stderr, "emulation failure\n");
-        if (!kvm_arch_stop_on_emulation_error(cpu)) {
-            cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE);
-            return EXCP_INTERRUPT;
-        }
-    }
-    /* FIXME: Should trigger a qmp message to let management know
-     * something went wrong.
-     */
-    return -1;
-}
-
-void kvm_flush_coalesced_mmio_buffer(void)
-{
-    KVMState *s = kvm_state;
-
-    if (s->coalesced_flush_in_progress) {
-        return;
-    }
-
-    s->coalesced_flush_in_progress = true;
-
-    if (s->coalesced_mmio_ring) {
-        struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
-        while (ring->first != ring->last) {
-            struct kvm_coalesced_mmio *ent;
-
-            ent = &ring->coalesced_mmio[ring->first];
-
-            cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
-            smp_wmb();
-            ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
-        }
-    }
-
-    s->coalesced_flush_in_progress = false;
-}
-
-static void do_kvm_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg)
-{
-    if (!cpu->kvm_vcpu_dirty) {
-        kvm_arch_get_registers(cpu);
-        cpu->kvm_vcpu_dirty = true;
-    }
-}
-
-void kvm_cpu_synchronize_state(CPUState *cpu)
-{
-    if (!cpu->kvm_vcpu_dirty) {
-        run_on_cpu(cpu, do_kvm_cpu_synchronize_state, RUN_ON_CPU_NULL);
-    }
-}
-
-static void do_kvm_cpu_synchronize_post_reset(CPUState *cpu, run_on_cpu_data arg)
-{
-    kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE);
-    cpu->kvm_vcpu_dirty = false;
-}
-
-void kvm_cpu_synchronize_post_reset(CPUState *cpu)
-{
-    run_on_cpu(cpu, do_kvm_cpu_synchronize_post_reset, RUN_ON_CPU_NULL);
-}
-
-static void do_kvm_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg)
-{
-    kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE);
-    cpu->kvm_vcpu_dirty = false;
-}
-
-void kvm_cpu_synchronize_post_init(CPUState *cpu)
-{
-    run_on_cpu(cpu, do_kvm_cpu_synchronize_post_init, RUN_ON_CPU_NULL);
-}
-
-static void do_kvm_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg)
-{
-    cpu->kvm_vcpu_dirty = true;
-}
-
-void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu)
-{
-    run_on_cpu(cpu, do_kvm_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL);
-}
-
-#ifdef KVM_HAVE_MCE_INJECTION
-static __thread void *pending_sigbus_addr;
-static __thread int pending_sigbus_code;
-static __thread bool have_sigbus_pending;
-#endif
-
-static void kvm_cpu_kick(CPUState *cpu)
-{
-    atomic_set(&cpu->kvm_run->immediate_exit, 1);
-}
-
-static void kvm_cpu_kick_self(void)
-{
-    if (kvm_immediate_exit) {
-        kvm_cpu_kick(current_cpu);
-    } else {
-        qemu_cpu_kick_self();
-    }
-}
-
-static void kvm_eat_signals(CPUState *cpu)
-{
-    struct timespec ts = { 0, 0 };
-    siginfo_t siginfo;
-    sigset_t waitset;
-    sigset_t chkset;
-    int r;
-
-    if (kvm_immediate_exit) {
-        atomic_set(&cpu->kvm_run->immediate_exit, 0);
-        /* Write kvm_run->immediate_exit before the cpu->exit_request
-         * write in kvm_cpu_exec.
-         */
-        smp_wmb();
-        return;
-    }
-
-    sigemptyset(&waitset);
-    sigaddset(&waitset, SIG_IPI);
-
-    do {
-        r = sigtimedwait(&waitset, &siginfo, &ts);
-        if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
-            perror("sigtimedwait");
-            exit(1);
-        }
-
-        r = sigpending(&chkset);
-        if (r == -1) {
-            perror("sigpending");
-            exit(1);
-        }
-    } while (sigismember(&chkset, SIG_IPI));
-}
-
-int kvm_cpu_exec(CPUState *cpu)
-{
-    struct kvm_run *run = cpu->kvm_run;
-    int ret, run_ret;
-
-    DPRINTF("kvm_cpu_exec()\n");
-
-    if (kvm_arch_process_async_events(cpu)) {
-        atomic_set(&cpu->exit_request, 0);
-        return EXCP_HLT;
-    }
-
-    qemu_mutex_unlock_iothread();
-    cpu_exec_start(cpu);
-
-    do {
-        MemTxAttrs attrs;
-
-        if (cpu->kvm_vcpu_dirty) {
-            kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE);
-            cpu->kvm_vcpu_dirty = false;
-        }
-
-        kvm_arch_pre_run(cpu, run);
-        if (atomic_read(&cpu->exit_request)) {
-            DPRINTF("interrupt exit requested\n");
-            /*
-             * KVM requires us to reenter the kernel after IO exits to complete
-             * instruction emulation. This self-signal will ensure that we
-             * leave ASAP again.
-             */
-            kvm_cpu_kick_self();
-        }
-
-        /* Read cpu->exit_request before KVM_RUN reads run->immediate_exit.
-         * Matching barrier in kvm_eat_signals.
-         */
-        smp_rmb();
-
-        run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0);
-
-        attrs = kvm_arch_post_run(cpu, run);
-
-#ifdef KVM_HAVE_MCE_INJECTION
-        if (unlikely(have_sigbus_pending)) {
-            qemu_mutex_lock_iothread();
-            kvm_arch_on_sigbus_vcpu(cpu, pending_sigbus_code,
-                                    pending_sigbus_addr);
-            have_sigbus_pending = false;
-            qemu_mutex_unlock_iothread();
-        }
-#endif
-
-        if (run_ret < 0) {
-            if (run_ret == -EINTR || run_ret == -EAGAIN) {
-                DPRINTF("io window exit\n");
-                kvm_eat_signals(cpu);
-                ret = EXCP_INTERRUPT;
-                break;
-            }
-            fprintf(stderr, "error: kvm run failed %s\n",
-                    strerror(-run_ret));
-#ifdef TARGET_PPC
-            if (run_ret == -EBUSY) {
-                fprintf(stderr,
-                        "This is probably because your SMT is enabled.\n"
-                        "VCPU can only run on primary threads with all "
-                        "secondary threads offline.\n");
-            }
-#endif
-            ret = -1;
-            break;
-        }
-
-        trace_kvm_run_exit(cpu->cpu_index, run->exit_reason);
-        switch (run->exit_reason) {
-        case KVM_EXIT_IO:
-            DPRINTF("handle_io\n");
-            /* Called outside BQL */
-            kvm_handle_io(run->io.port, attrs,
-                          (uint8_t *)run + run->io.data_offset,
-                          run->io.direction,
-                          run->io.size,
-                          run->io.count);
-            ret = 0;
-            break;
-        case KVM_EXIT_MMIO:
-            DPRINTF("handle_mmio\n");
-            /* Called outside BQL */
-            address_space_rw(&address_space_memory,
-                             run->mmio.phys_addr, attrs,
-                             run->mmio.data,
-                             run->mmio.len,
-                             run->mmio.is_write);
-            ret = 0;
-            break;
-        case KVM_EXIT_IRQ_WINDOW_OPEN:
-            DPRINTF("irq_window_open\n");
-            ret = EXCP_INTERRUPT;
-            break;
-        case KVM_EXIT_SHUTDOWN:
-            DPRINTF("shutdown\n");
-            qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
-            ret = EXCP_INTERRUPT;
-            break;
-        case KVM_EXIT_UNKNOWN:
-            fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
-                    (uint64_t)run->hw.hardware_exit_reason);
-            ret = -1;
-            break;
-        case KVM_EXIT_INTERNAL_ERROR:
-            ret = kvm_handle_internal_error(cpu, run);
-            break;
-        case KVM_EXIT_SYSTEM_EVENT:
-            switch (run->system_event.type) {
-            case KVM_SYSTEM_EVENT_SHUTDOWN:
-                qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
-                ret = EXCP_INTERRUPT;
-                break;
-            case KVM_SYSTEM_EVENT_RESET:
-                qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
-                ret = EXCP_INTERRUPT;
-                break;
-            case KVM_SYSTEM_EVENT_CRASH:
-                kvm_cpu_synchronize_state(cpu);
-                qemu_mutex_lock_iothread();
-                qemu_system_guest_panicked(cpu_get_crash_info(cpu));
-                qemu_mutex_unlock_iothread();
-                ret = 0;
-                break;
-            default:
-                DPRINTF("kvm_arch_handle_exit\n");
-                ret = kvm_arch_handle_exit(cpu, run);
-                break;
-            }
-            break;
-        default:
-            DPRINTF("kvm_arch_handle_exit\n");
-            ret = kvm_arch_handle_exit(cpu, run);
-            break;
-        }
-    } while (ret == 0);
-
-    cpu_exec_end(cpu);
-    qemu_mutex_lock_iothread();
-
-    if (ret < 0) {
-        cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE);
-        vm_stop(RUN_STATE_INTERNAL_ERROR);
-    }
-
-    atomic_set(&cpu->exit_request, 0);
-    return ret;
-}
-
-int kvm_ioctl(KVMState *s, int type, ...)
-{
-    int ret;
-    void *arg;
-    va_list ap;
-
-    va_start(ap, type);
-    arg = va_arg(ap, void *);
-    va_end(ap);
-
-    trace_kvm_ioctl(type, arg);
-    ret = ioctl(s->fd, type, arg);
-    if (ret == -1) {
-        ret = -errno;
-    }
-    return ret;
-}
-
-int kvm_vm_ioctl(KVMState *s, int type, ...)
-{
-    int ret;
-    void *arg;
-    va_list ap;
-
-    va_start(ap, type);
-    arg = va_arg(ap, void *);
-    va_end(ap);
-
-    trace_kvm_vm_ioctl(type, arg);
-    ret = ioctl(s->vmfd, type, arg);
-    if (ret == -1) {
-        ret = -errno;
-    }
-    return ret;
-}
-
-int kvm_vcpu_ioctl(CPUState *cpu, int type, ...)
-{
-    int ret;
-    void *arg;
-    va_list ap;
-
-    va_start(ap, type);
-    arg = va_arg(ap, void *);
-    va_end(ap);
-
-    trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg);
-    ret = ioctl(cpu->kvm_fd, type, arg);
-    if (ret == -1) {
-        ret = -errno;
-    }
-    return ret;
-}
-
-int kvm_device_ioctl(int fd, int type, ...)
-{
-    int ret;
-    void *arg;
-    va_list ap;
-
-    va_start(ap, type);
-    arg = va_arg(ap, void *);
-    va_end(ap);
-
-    trace_kvm_device_ioctl(fd, type, arg);
-    ret = ioctl(fd, type, arg);
-    if (ret == -1) {
-        ret = -errno;
-    }
-    return ret;
-}
-
-int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr)
-{
-    int ret;
-    struct kvm_device_attr attribute = {
-        .group = group,
-        .attr = attr,
-    };
-
-    if (!kvm_vm_attributes_allowed) {
-        return 0;
-    }
-
-    ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute);
-    /* kvm returns 0 on success for HAS_DEVICE_ATTR */
-    return ret ? 0 : 1;
-}
-
-int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr)
-{
-    struct kvm_device_attr attribute = {
-        .group = group,
-        .attr = attr,
-        .flags = 0,
-    };
-
-    return kvm_device_ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute) ? 0 : 1;
-}
-
-int kvm_device_access(int fd, int group, uint64_t attr,
-                      void *val, bool write, Error **errp)
-{
-    struct kvm_device_attr kvmattr;
-    int err;
-
-    kvmattr.flags = 0;
-    kvmattr.group = group;
-    kvmattr.attr = attr;
-    kvmattr.addr = (uintptr_t)val;
-
-    err = kvm_device_ioctl(fd,
-                           write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR,
-                           &kvmattr);
-    if (err < 0) {
-        error_setg_errno(errp, -err,
-                         "KVM_%s_DEVICE_ATTR failed: Group %d "
-                         "attr 0x%016" PRIx64,
-                         write ? "SET" : "GET", group, attr);
-    }
-    return err;
-}
-
-/* Return 1 on success, 0 on failure */
-int kvm_has_sync_mmu(void)
-{
-    return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
-}
-
-int kvm_has_vcpu_events(void)
-{
-    return kvm_state->vcpu_events;
-}
-
-int kvm_has_robust_singlestep(void)
-{
-    return kvm_state->robust_singlestep;
-}
-
-int kvm_has_debugregs(void)
-{
-    return kvm_state->debugregs;
-}
-
-int kvm_has_many_ioeventfds(void)
-{
-    if (!kvm_enabled()) {
-        return 0;
-    }
-    return kvm_state->many_ioeventfds;
-}
-
-int kvm_has_gsi_routing(void)
-{
-#ifdef KVM_CAP_IRQ_ROUTING
-    return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING);
-#else
-    return false;
-#endif
-}
-
-int kvm_has_intx_set_mask(void)
-{
-    return kvm_state->intx_set_mask;
-}
-
-#ifdef KVM_CAP_SET_GUEST_DEBUG
-struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
-                                                 target_ulong pc)
-{
-    struct kvm_sw_breakpoint *bp;
-
-    QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) {
-        if (bp->pc == pc) {
-            return bp;
-        }
-    }
-    return NULL;
-}
-
-int kvm_sw_breakpoints_active(CPUState *cpu)
-{
-    return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints);
-}
-
-struct kvm_set_guest_debug_data {
-    struct kvm_guest_debug dbg;
-    int err;
-};
-
-static void kvm_invoke_set_guest_debug(CPUState *cpu, run_on_cpu_data data)
-{
-    struct kvm_set_guest_debug_data *dbg_data =
-        (struct kvm_set_guest_debug_data *) data.host_ptr;
-
-    dbg_data->err = kvm_vcpu_ioctl(cpu, KVM_SET_GUEST_DEBUG,
-                                   &dbg_data->dbg);
-}
-
-int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
-{
-    struct kvm_set_guest_debug_data data;
-
-    data.dbg.control = reinject_trap;
-
-    if (cpu->singlestep_enabled) {
-        data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
-    }
-    kvm_arch_update_guest_debug(cpu, &data.dbg);
-
-    run_on_cpu(cpu, kvm_invoke_set_guest_debug,
-               RUN_ON_CPU_HOST_PTR(&data));
-    return data.err;
-}
-
-int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
-                          target_ulong len, int type)
-{
-    struct kvm_sw_breakpoint *bp;
-    int err;
-
-    if (type == GDB_BREAKPOINT_SW) {
-        bp = kvm_find_sw_breakpoint(cpu, addr);
-        if (bp) {
-            bp->use_count++;
-            return 0;
-        }
-
-        bp = g_malloc(sizeof(struct kvm_sw_breakpoint));
-        bp->pc = addr;
-        bp->use_count = 1;
-        err = kvm_arch_insert_sw_breakpoint(cpu, bp);
-        if (err) {
-            g_free(bp);
-            return err;
-        }
-
-        QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
-    } else {
-        err = kvm_arch_insert_hw_breakpoint(addr, len, type);
-        if (err) {
-            return err;
-        }
-    }
-
-    CPU_FOREACH(cpu) {
-        err = kvm_update_guest_debug(cpu, 0);
-        if (err) {
-            return err;
-        }
-    }
-    return 0;
-}
-
-int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
-                          target_ulong len, int type)
-{
-    struct kvm_sw_breakpoint *bp;
-    int err;
-
-    if (type == GDB_BREAKPOINT_SW) {
-        bp = kvm_find_sw_breakpoint(cpu, addr);
-        if (!bp) {
-            return -ENOENT;
-        }
-
-        if (bp->use_count > 1) {
-            bp->use_count--;
-            return 0;
-        }
-
-        err = kvm_arch_remove_sw_breakpoint(cpu, bp);
-        if (err) {
-            return err;
-        }
-
-        QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry);
-        g_free(bp);
-    } else {
-        err = kvm_arch_remove_hw_breakpoint(addr, len, type);
-        if (err) {
-            return err;
-        }
-    }
-
-    CPU_FOREACH(cpu) {
-        err = kvm_update_guest_debug(cpu, 0);
-        if (err) {
-            return err;
-        }
-    }
-    return 0;
-}
-
-void kvm_remove_all_breakpoints(CPUState *cpu)
-{
-    struct kvm_sw_breakpoint *bp, *next;
-    KVMState *s = cpu->kvm_state;
-    CPUState *tmpcpu;
-
-    QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
-        if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) {
-            /* Try harder to find a CPU that currently sees the breakpoint. */
-            CPU_FOREACH(tmpcpu) {
-                if (kvm_arch_remove_sw_breakpoint(tmpcpu, bp) == 0) {
-                    break;
-                }
-            }
-        }
-        QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry);
-        g_free(bp);
-    }
-    kvm_arch_remove_all_hw_breakpoints();
-
-    CPU_FOREACH(cpu) {
-        kvm_update_guest_debug(cpu, 0);
-    }
-}
-
-#else /* !KVM_CAP_SET_GUEST_DEBUG */
-
-int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
-{
-    return -EINVAL;
-}
-
-int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
-                          target_ulong len, int type)
-{
-    return -EINVAL;
-}
-
-int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
-                          target_ulong len, int type)
-{
-    return -EINVAL;
-}
-
-void kvm_remove_all_breakpoints(CPUState *cpu)
-{
-}
-#endif /* !KVM_CAP_SET_GUEST_DEBUG */
-
-static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset)
-{
-    KVMState *s = kvm_state;
-    struct kvm_signal_mask *sigmask;
-    int r;
-
-    sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset));
-
-    sigmask->len = s->sigmask_len;
-    memcpy(sigmask->sigset, sigset, sizeof(*sigset));
-    r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask);
-    g_free(sigmask);
-
-    return r;
-}
-
-static void kvm_ipi_signal(int sig)
-{
-    if (current_cpu) {
-        assert(kvm_immediate_exit);
-        kvm_cpu_kick(current_cpu);
-    }
-}
-
-void kvm_init_cpu_signals(CPUState *cpu)
-{
-    int r;
-    sigset_t set;
-    struct sigaction sigact;
-
-    memset(&sigact, 0, sizeof(sigact));
-    sigact.sa_handler = kvm_ipi_signal;
-    sigaction(SIG_IPI, &sigact, NULL);
-
-    pthread_sigmask(SIG_BLOCK, NULL, &set);
-#if defined KVM_HAVE_MCE_INJECTION
-    sigdelset(&set, SIGBUS);
-    pthread_sigmask(SIG_SETMASK, &set, NULL);
-#endif
-    sigdelset(&set, SIG_IPI);
-    if (kvm_immediate_exit) {
-        r = pthread_sigmask(SIG_SETMASK, &set, NULL);
-    } else {
-        r = kvm_set_signal_mask(cpu, &set);
-    }
-    if (r) {
-        fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
-        exit(1);
-    }
-}
-
-/* Called asynchronously in VCPU thread.  */
-int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
-{
-#ifdef KVM_HAVE_MCE_INJECTION
-    if (have_sigbus_pending) {
-        return 1;
-    }
-    have_sigbus_pending = true;
-    pending_sigbus_addr = addr;
-    pending_sigbus_code = code;
-    atomic_set(&cpu->exit_request, 1);
-    return 0;
-#else
-    return 1;
-#endif
-}
-
-/* Called synchronously (via signalfd) in main thread.  */
-int kvm_on_sigbus(int code, void *addr)
-{
-#ifdef KVM_HAVE_MCE_INJECTION
-    /* Action required MCE kills the process if SIGBUS is blocked.  Because
-     * that's what happens in the I/O thread, where we handle MCE via signalfd,
-     * we can only get action optional here.
-     */
-    assert(code != BUS_MCEERR_AR);
-    kvm_arch_on_sigbus_vcpu(first_cpu, code, addr);
-    return 0;
-#else
-    return 1;
-#endif
-}
-
-int kvm_create_device(KVMState *s, uint64_t type, bool test)
-{
-    int ret;
-    struct kvm_create_device create_dev;
-
-    create_dev.type = type;
-    create_dev.fd = -1;
-    create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
-
-    if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) {
-        return -ENOTSUP;
-    }
-
-    ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev);
-    if (ret) {
-        return ret;
-    }
-
-    return test ? 0 : create_dev.fd;
-}
-
-bool kvm_device_supported(int vmfd, uint64_t type)
-{
-    struct kvm_create_device create_dev = {
-        .type = type,
-        .fd = -1,
-        .flags = KVM_CREATE_DEVICE_TEST,
-    };
-
-    if (ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_DEVICE_CTRL) <= 0) {
-        return false;
-    }
-
-    return (ioctl(vmfd, KVM_CREATE_DEVICE, &create_dev) >= 0);
-}
-
-int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source)
-{
-    struct kvm_one_reg reg;
-    int r;
-
-    reg.id = id;
-    reg.addr = (uintptr_t) source;
-    r = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
-    if (r) {
-        trace_kvm_failed_reg_set(id, strerror(-r));
-    }
-    return r;
-}
-
-int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target)
-{
-    struct kvm_one_reg reg;
-    int r;
-
-    reg.id = id;
-    reg.addr = (uintptr_t) target;
-    r = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
-    if (r) {
-        trace_kvm_failed_reg_get(id, strerror(-r));
-    }
-    return r;
-}
-
-static void kvm_accel_class_init(ObjectClass *oc, void *data)
-{
-    AccelClass *ac = ACCEL_CLASS(oc);
-    ac->name = "KVM";
-    ac->init_machine = kvm_init;
-    ac->allowed = &kvm_allowed;
-}
-
-static const TypeInfo kvm_accel_type = {
-    .name = TYPE_KVM_ACCEL,
-    .parent = TYPE_ACCEL,
-    .class_init = kvm_accel_class_init,
-    .instance_size = sizeof(KVMState),
-};
-
-static void kvm_type_init(void)
-{
-    type_register_static(&kvm_accel_type);
-}
-
-type_init(kvm_type_init);