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vfio/migration: Implement VFIO migration protocol v2

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Implement the basic mandatory part of VFIO migration protocol v2.
This includes all functionality that is necessary to support
VFIO_MIGRATION_STOP_COPY part of the v2 protocol.

The two protocols, v1 and v2, will co-exist and in the following patches
v1 protocol code will be removed.

There are several main differences between v1 and v2 protocols:
- VFIO device state is now represented as a finite state machine instead
  of a bitmap.

- Migration interface with kernel is now done using VFIO_DEVICE_FEATURE
  ioctl and normal read() and write() instead of the migration region.

- Pre-copy is made optional in v2 protocol. Support for pre-copy will be
  added later on.

Detailed information about VFIO migration protocol v2 and its difference
compared to v1 protocol can be found here [1].

[1]
https://lore.kernel.org/all/20220224142024.147653-10-yishaih@nvidia.com/

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>.
Link: https://lore.kernel.org/r/20230216143630.25610-9-avihaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Avihai Horon 2023-02-16 16:36:27 +02:00 committed by Alex Williamson
parent 6eeb290910
commit 31bcbbb5be
4 changed files with 471 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
hw/vfio/common.c
View File

@ -408,10 +408,17 @@ static bool vfio_devices_all_dirty_tracking(VFIOContainer *container)
return false;
}
if ((vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF) &&
if (!migration->v2 &&
(vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF) &&
(migration->device_state_v1 & VFIO_DEVICE_STATE_V1_RUNNING)) {
return false;
}
if (migration->v2 &&
vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF &&
migration->device_state == VFIO_DEVICE_STATE_RUNNING) {
return false;
}
}
}
return true;
@ -438,7 +445,13 @@ static bool vfio_devices_all_running_and_mig_active(VFIOContainer *container)
return false;
}
if (migration->device_state_v1 & VFIO_DEVICE_STATE_V1_RUNNING) {
if (!migration->v2 &&
migration->device_state_v1 & VFIO_DEVICE_STATE_V1_RUNNING) {
continue;
}
if (migration->v2 &&
migration->device_state == VFIO_DEVICE_STATE_RUNNING) {
continue;
} else {
return false;

483
hw/vfio/migration.c
View File

@ -10,6 +10,7 @@
#include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "qemu/cutils.h"
#include "qemu/units.h"
#include <linux/vfio.h>
#include <sys/ioctl.h>
@ -44,8 +45,114 @@
#define VFIO_MIG_FLAG_DEV_SETUP_STATE (0xffffffffef100003ULL)
#define VFIO_MIG_FLAG_DEV_DATA_STATE (0xffffffffef100004ULL)
/*
* This is an arbitrary size based on migration of mlx5 devices, where typically
* total device migration size is on the order of 100s of MB. Testing with
* larger values, e.g. 128MB and 1GB, did not show a performance improvement.
*/
#define VFIO_MIG_DEFAULT_DATA_BUFFER_SIZE (1 * MiB)
static int64_t bytes_transferred;
static const char *mig_state_to_str(enum vfio_device_mig_state state)
{
switch (state) {
case VFIO_DEVICE_STATE_ERROR:
return "ERROR";
case VFIO_DEVICE_STATE_STOP:
return "STOP";
case VFIO_DEVICE_STATE_RUNNING:
return "RUNNING";
case VFIO_DEVICE_STATE_STOP_COPY:
return "STOP_COPY";
case VFIO_DEVICE_STATE_RESUMING:
return "RESUMING";
default:
return "UNKNOWN STATE";
}
}
static int vfio_migration_set_state(VFIODevice *vbasedev,
enum vfio_device_mig_state new_state,
enum vfio_device_mig_state recover_state)
{
VFIOMigration *migration = vbasedev->migration;
uint64_t buf[DIV_ROUND_UP(sizeof(struct vfio_device_feature) +
sizeof(struct vfio_device_feature_mig_state),
sizeof(uint64_t))] = {};
struct vfio_device_feature *feature = (struct vfio_device_feature *)buf;
struct vfio_device_feature_mig_state *mig_state =
(struct vfio_device_feature_mig_state *)feature->data;
int ret;
feature->argsz = sizeof(buf);
feature->flags =
VFIO_DEVICE_FEATURE_SET | VFIO_DEVICE_FEATURE_MIG_DEVICE_STATE;
mig_state->device_state = new_state;
if (ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature)) {
/* Try to set the device in some good state */
ret = -errno;
if (recover_state == VFIO_DEVICE_STATE_ERROR) {
error_report("%s: Failed setting device state to %s, err: %s. "
"Recover state is ERROR. Resetting device",
vbasedev->name, mig_state_to_str(new_state),
strerror(errno));
goto reset_device;
}
error_report(
"%s: Failed setting device state to %s, err: %s. Setting device in recover state %s",
vbasedev->name, mig_state_to_str(new_state),
strerror(errno), mig_state_to_str(recover_state));
mig_state->device_state = recover_state;
if (ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature)) {
ret = -errno;
error_report(
"%s: Failed setting device in recover state, err: %s. Resetting device",
vbasedev->name, strerror(errno));
goto reset_device;
}
migration->device_state = recover_state;
return ret;
}
migration->device_state = new_state;
if (mig_state->data_fd != -1) {
if (migration->data_fd != -1) {
/*
* This can happen if the device is asynchronously reset and
* terminates a data transfer.
*/
error_report("%s: data_fd out of sync", vbasedev->name);
close(mig_state->data_fd);
return -EBADF;
}
migration->data_fd = mig_state->data_fd;
}
trace_vfio_migration_set_state(vbasedev->name, mig_state_to_str(new_state));
return 0;
reset_device:
if (ioctl(vbasedev->fd, VFIO_DEVICE_RESET)) {
hw_error("%s: Failed resetting device, err: %s", vbasedev->name,
strerror(errno));
}
migration->device_state = VFIO_DEVICE_STATE_RUNNING;
return ret;
}
static inline int vfio_mig_access(VFIODevice *vbasedev, void *val, int count,
off_t off, bool iswrite)
{
@ -260,6 +367,18 @@ static int vfio_save_buffer(QEMUFile *f, VFIODevice *vbasedev, uint64_t *size)
return ret;
}
static int vfio_load_buffer(QEMUFile *f, VFIODevice *vbasedev,
uint64_t data_size)
{
VFIOMigration *migration = vbasedev->migration;
int ret;
ret = qemu_file_get_to_fd(f, migration->data_fd, data_size);
trace_vfio_load_state_device_data(vbasedev->name, data_size, ret);
return ret;
}
static int vfio_v1_load_buffer(QEMUFile *f, VFIODevice *vbasedev,
uint64_t data_size)
{
@ -394,6 +513,14 @@ static int vfio_load_device_config_state(QEMUFile *f, void *opaque)
return qemu_file_get_error(f);
}
static void vfio_migration_cleanup(VFIODevice *vbasedev)
{
VFIOMigration *migration = vbasedev->migration;
close(migration->data_fd);
migration->data_fd = -1;
}
static void vfio_migration_v1_cleanup(VFIODevice *vbasedev)
{
VFIOMigration *migration = vbasedev->migration;
@ -403,8 +530,80 @@ static void vfio_migration_v1_cleanup(VFIODevice *vbasedev)
}
}
static int vfio_query_stop_copy_size(VFIODevice *vbasedev,
uint64_t *stop_copy_size)
{
uint64_t buf[DIV_ROUND_UP(sizeof(struct vfio_device_feature) +
sizeof(struct vfio_device_feature_mig_data_size),
sizeof(uint64_t))] = {};
struct vfio_device_feature *feature = (struct vfio_device_feature *)buf;
struct vfio_device_feature_mig_data_size *mig_data_size =
(struct vfio_device_feature_mig_data_size *)feature->data;
feature->argsz = sizeof(buf);
feature->flags =
VFIO_DEVICE_FEATURE_GET | VFIO_DEVICE_FEATURE_MIG_DATA_SIZE;
if (ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature)) {
return -errno;
}
*stop_copy_size = mig_data_size->stop_copy_length;
return 0;
}
/* Returns 1 if end-of-stream is reached, 0 if more data and -errno if error */
static int vfio_save_block(QEMUFile *f, VFIOMigration *migration)
{
ssize_t data_size;
data_size = read(migration->data_fd, migration->data_buffer,
migration->data_buffer_size);
if (data_size < 0) {
return -errno;
}
if (data_size == 0) {
return 1;
}
qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE);
qemu_put_be64(f, data_size);
qemu_put_buffer(f, migration->data_buffer, data_size);
bytes_transferred += data_size;
trace_vfio_save_block(migration->vbasedev->name, data_size);
return qemu_file_get_error(f);
}
/* ---------------------------------------------------------------------- */
static int vfio_save_setup(QEMUFile *f, void *opaque)
{
VFIODevice *vbasedev = opaque;
VFIOMigration *migration = vbasedev->migration;
uint64_t stop_copy_size = VFIO_MIG_DEFAULT_DATA_BUFFER_SIZE;
qemu_put_be64(f, VFIO_MIG_FLAG_DEV_SETUP_STATE);
vfio_query_stop_copy_size(vbasedev, &stop_copy_size);
migration->data_buffer_size = MIN(VFIO_MIG_DEFAULT_DATA_BUFFER_SIZE,
stop_copy_size);
migration->data_buffer = g_try_malloc0(migration->data_buffer_size);
if (!migration->data_buffer) {
error_report("%s: Failed to allocate migration data buffer",
vbasedev->name);
return -ENOMEM;
}
trace_vfio_save_setup(vbasedev->name, migration->data_buffer_size);
qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE);
return qemu_file_get_error(f);
}
static int vfio_v1_save_setup(QEMUFile *f, void *opaque)
{
VFIODevice *vbasedev = opaque;
@ -448,6 +647,17 @@ static int vfio_v1_save_setup(QEMUFile *f, void *opaque)
return 0;
}
static void vfio_save_cleanup(void *opaque)
{
VFIODevice *vbasedev = opaque;
VFIOMigration *migration = vbasedev->migration;
g_free(migration->data_buffer);
migration->data_buffer = NULL;
vfio_migration_cleanup(vbasedev);
trace_vfio_save_cleanup(vbasedev->name);
}
static void vfio_v1_save_cleanup(void *opaque)
{
VFIODevice *vbasedev = opaque;
@ -456,6 +666,35 @@ static void vfio_v1_save_cleanup(void *opaque)
trace_vfio_save_cleanup(vbasedev->name);
}
/*
* Migration size of VFIO devices can be as little as a few KBs or as big as
* many GBs. This value should be big enough to cover the worst case.
*/
#define VFIO_MIG_STOP_COPY_SIZE (100 * GiB)
/*
* Only exact function is implemented and not estimate function. The reason is
* that during pre-copy phase of migration the estimate function is called
* repeatedly while pending RAM size is over the threshold, thus migration
* can't converge and querying the VFIO device pending data size is useless.
*/
static void vfio_state_pending_exact(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy)
{
VFIODevice *vbasedev = opaque;
uint64_t stop_copy_size = VFIO_MIG_STOP_COPY_SIZE;
/*
* If getting pending migration size fails, VFIO_MIG_STOP_COPY_SIZE is
* reported so downtime limit won't be violated.
*/
vfio_query_stop_copy_size(vbasedev, &stop_copy_size);
*must_precopy += stop_copy_size;
trace_vfio_state_pending_exact(vbasedev->name, *must_precopy, *can_postcopy,
stop_copy_size);
}
static void vfio_v1_state_pending(void *opaque, uint64_t *must_precopy,
uint64_t *can_postcopy)
{
@ -520,6 +759,42 @@ static int vfio_save_iterate(QEMUFile *f, void *opaque)
return 0;
}
static int vfio_save_complete_precopy(QEMUFile *f, void *opaque)
{
VFIODevice *vbasedev = opaque;
int ret;
/* We reach here with device state STOP only */
ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_STOP_COPY,
VFIO_DEVICE_STATE_STOP);
if (ret) {
return ret;
}
do {
ret = vfio_save_block(f, vbasedev->migration);
if (ret < 0) {
return ret;
}
} while (!ret);
qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE);
ret = qemu_file_get_error(f);
if (ret) {
return ret;
}
/*
* If setting the device in STOP state fails, the device should be reset.
* To do so, use ERROR state as a recover state.
*/
ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_STOP,
VFIO_DEVICE_STATE_ERROR);
trace_vfio_save_complete_precopy(vbasedev->name, ret);
return ret;
}
static int vfio_v1_save_complete_precopy(QEMUFile *f, void *opaque)
{
VFIODevice *vbasedev = opaque;
@ -589,6 +864,14 @@ static void vfio_save_state(QEMUFile *f, void *opaque)
}
}
static int vfio_load_setup(QEMUFile *f, void *opaque)
{
VFIODevice *vbasedev = opaque;
return vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_RESUMING,
vbasedev->migration->device_state);
}
static int vfio_v1_load_setup(QEMUFile *f, void *opaque)
{
VFIODevice *vbasedev = opaque;
@ -616,6 +899,16 @@ static int vfio_v1_load_setup(QEMUFile *f, void *opaque)
return ret;
}
static int vfio_load_cleanup(void *opaque)
{
VFIODevice *vbasedev = opaque;
vfio_migration_cleanup(vbasedev);
trace_vfio_load_cleanup(vbasedev->name);
return 0;
}
static int vfio_v1_load_cleanup(void *opaque)
{
VFIODevice *vbasedev = opaque;
@ -658,7 +951,11 @@ static int vfio_load_state(QEMUFile *f, void *opaque, int version_id)
uint64_t data_size = qemu_get_be64(f);
if (data_size) {
ret = vfio_v1_load_buffer(f, vbasedev, data_size);
if (vbasedev->migration->v2) {
ret = vfio_load_buffer(f, vbasedev, data_size);
} else {
ret = vfio_v1_load_buffer(f, vbasedev, data_size);
}
if (ret < 0) {
return ret;
}
@ -679,6 +976,17 @@ static int vfio_load_state(QEMUFile *f, void *opaque, int version_id)
return ret;
}
static const SaveVMHandlers savevm_vfio_handlers = {
.save_setup = vfio_save_setup,
.save_cleanup = vfio_save_cleanup,
.state_pending_exact = vfio_state_pending_exact,
.save_live_complete_precopy = vfio_save_complete_precopy,
.save_state = vfio_save_state,
.load_setup = vfio_load_setup,
.load_cleanup = vfio_load_cleanup,
.load_state = vfio_load_state,
};
static SaveVMHandlers savevm_vfio_v1_handlers = {
.save_setup = vfio_v1_save_setup,
.save_cleanup = vfio_v1_save_cleanup,
@ -694,6 +1002,38 @@ static SaveVMHandlers savevm_vfio_v1_handlers = {
/* ---------------------------------------------------------------------- */
static void vfio_vmstate_change(void *opaque, bool running, RunState state)
{
VFIODevice *vbasedev = opaque;
enum vfio_device_mig_state new_state;
int ret;
if (running) {
new_state = VFIO_DEVICE_STATE_RUNNING;
} else {
new_state = VFIO_DEVICE_STATE_STOP;
}
/*
* If setting the device in new_state fails, the device should be reset.
* To do so, use ERROR state as a recover state.
*/
ret = vfio_migration_set_state(vbasedev, new_state,
VFIO_DEVICE_STATE_ERROR);
if (ret) {
/*
* Migration should be aborted in this case, but vm_state_notify()
* currently does not support reporting failures.
*/
if (migrate_get_current()->to_dst_file) {
qemu_file_set_error(migrate_get_current()->to_dst_file, ret);
}
}
trace_vfio_vmstate_change(vbasedev->name, running, RunState_str(state),
mig_state_to_str(new_state));
}
static void vfio_v1_vmstate_change(void *opaque, bool running, RunState state)
{
VFIODevice *vbasedev = opaque;
@ -767,12 +1107,21 @@ static void vfio_migration_state_notifier(Notifier *notifier, void *data)
case MIGRATION_STATUS_CANCELLED:
case MIGRATION_STATUS_FAILED:
bytes_transferred = 0;
ret = vfio_migration_v1_set_state(vbasedev,
~(VFIO_DEVICE_STATE_V1_SAVING |
VFIO_DEVICE_STATE_V1_RESUMING),
VFIO_DEVICE_STATE_V1_RUNNING);
if (ret) {
error_report("%s: Failed to set state RUNNING", vbasedev->name);
if (migration->v2) {
/*
* If setting the device in RUNNING state fails, the device should
* be reset. To do so, use ERROR state as a recover state.
*/
vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_RUNNING,
VFIO_DEVICE_STATE_ERROR);
} else {
ret = vfio_migration_v1_set_state(vbasedev,
~(VFIO_DEVICE_STATE_V1_SAVING |
VFIO_DEVICE_STATE_V1_RESUMING),
VFIO_DEVICE_STATE_V1_RUNNING);
if (ret) {
error_report("%s: Failed to set state RUNNING", vbasedev->name);
}
}
}
}
@ -781,12 +1130,42 @@ static void vfio_migration_exit(VFIODevice *vbasedev)
{
VFIOMigration *migration = vbasedev->migration;
vfio_region_exit(&migration->region);
vfio_region_finalize(&migration->region);
if (!migration->v2) {
vfio_region_exit(&migration->region);
vfio_region_finalize(&migration->region);
}
g_free(vbasedev->migration);
vbasedev->migration = NULL;
}
static int vfio_migration_query_flags(VFIODevice *vbasedev, uint64_t *mig_flags)
{
uint64_t buf[DIV_ROUND_UP(sizeof(struct vfio_device_feature) +
sizeof(struct vfio_device_feature_migration),
sizeof(uint64_t))] = {};
struct vfio_device_feature *feature = (struct vfio_device_feature *)buf;
struct vfio_device_feature_migration *mig =
(struct vfio_device_feature_migration *)feature->data;
feature->argsz = sizeof(buf);
feature->flags = VFIO_DEVICE_FEATURE_GET | VFIO_DEVICE_FEATURE_MIGRATION;
if (ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature)) {
if (errno == ENOTTY) {
error_report("%s: VFIO migration is not supported in kernel",
vbasedev->name);
} else {
error_report("%s: Failed to query VFIO migration support, err: %s",
vbasedev->name, strerror(errno));
}
return -errno;
}
*mig_flags = mig->flags;
return 0;
}
static int vfio_migration_init(VFIODevice *vbasedev)
{
int ret;
@ -795,6 +1174,7 @@ static int vfio_migration_init(VFIODevice *vbasedev)
char id[256] = "";
g_autofree char *path = NULL, *oid = NULL;
struct vfio_region_info *info;
uint64_t mig_flags = 0;
if (!vbasedev->ops->vfio_get_object) {
return -EINVAL;
@ -805,35 +1185,51 @@ static int vfio_migration_init(VFIODevice *vbasedev)
return -EINVAL;
}
ret = vfio_get_dev_region_info(vbasedev,
VFIO_REGION_TYPE_MIGRATION_DEPRECATED,
VFIO_REGION_SUBTYPE_MIGRATION_DEPRECATED,
&info);
if (ret) {
ret = vfio_migration_query_flags(vbasedev, &mig_flags);
if (!ret) {
/* Migration v2 */
/* Basic migration functionality must be supported */
if (!(mig_flags & VFIO_MIGRATION_STOP_COPY)) {
return -EOPNOTSUPP;
}
vbasedev->migration = g_new0(VFIOMigration, 1);
vbasedev->migration->device_state = VFIO_DEVICE_STATE_RUNNING;
vbasedev->migration->data_fd = -1;
vbasedev->migration->v2 = true;
} else if (ret == -ENOTTY) {
/* Migration v1 */
ret = vfio_get_dev_region_info(vbasedev,
VFIO_REGION_TYPE_MIGRATION_DEPRECATED,
VFIO_REGION_SUBTYPE_MIGRATION_DEPRECATED,
&info);
if (ret) {
return ret;
}
vbasedev->migration = g_new0(VFIOMigration, 1);
vbasedev->migration->device_state_v1 = VFIO_DEVICE_STATE_V1_RUNNING;
vbasedev->migration->vm_running = runstate_is_running();
ret = vfio_region_setup(obj, vbasedev, &vbasedev->migration->region,
info->index, "migration");
if (ret) {
error_report("%s: Failed to setup VFIO migration region %d: %s",
vbasedev->name, info->index, strerror(-ret));
goto err;
}
if (!vbasedev->migration->region.size) {
error_report("%s: Invalid zero-sized VFIO migration region %d",
vbasedev->name, info->index);
ret = -EINVAL;
goto err;
}
g_free(info);
} else {
return ret;
}
vbasedev->migration = g_new0(VFIOMigration, 1);
vbasedev->migration->device_state_v1 = VFIO_DEVICE_STATE_V1_RUNNING;
vbasedev->migration->vm_running = runstate_is_running();
ret = vfio_region_setup(obj, vbasedev, &vbasedev->migration->region,
info->index, "migration");
if (ret) {
error_report("%s: Failed to setup VFIO migration region %d: %s",
vbasedev->name, info->index, strerror(-ret));
goto err;
}
if (!vbasedev->migration->region.size) {
error_report("%s: Invalid zero-sized VFIO migration region %d",
vbasedev->name, info->index);
ret = -EINVAL;
goto err;
}
g_free(info);
migration = vbasedev->migration;
migration->vbasedev = vbasedev;
@ -845,11 +1241,20 @@ static int vfio_migration_init(VFIODevice *vbasedev)
}
strpadcpy(id, sizeof(id), path, '\0');
register_savevm_live(id, VMSTATE_INSTANCE_ID_ANY, 1,
&savevm_vfio_v1_handlers, vbasedev);
if (migration->v2) {
register_savevm_live(id, VMSTATE_INSTANCE_ID_ANY, 1,
&savevm_vfio_handlers, vbasedev);
migration->vm_state = qdev_add_vm_change_state_handler(
vbasedev->dev, vfio_vmstate_change, vbasedev);
} else {
register_savevm_live(id, VMSTATE_INSTANCE_ID_ANY, 1,
&savevm_vfio_v1_handlers, vbasedev);
migration->vm_state = qdev_add_vm_change_state_handler(
vbasedev->dev, vfio_v1_vmstate_change, vbasedev);
}
migration->vm_state = qdev_add_vm_change_state_handler(
vbasedev->dev, vfio_v1_vmstate_change, vbasedev);
migration->migration_state.notify = vfio_migration_state_notifier;
add_migration_state_change_notifier(&migration->migration_state);
return 0;

7
hw/vfio/trace-events
View File

@ -149,20 +149,27 @@ vfio_display_edid_write_error(void) ""
# migration.c
vfio_migration_probe(const char *name) " (%s)"
vfio_migration_set_state(const char *name, const char *state) " (%s) state %s"
vfio_migration_v1_set_state(const char *name, uint32_t state) " (%s) state %d"
vfio_vmstate_change(const char *name, int running, const char *reason, const char *dev_state) " (%s) running %d reason %s device state %s"
vfio_v1_vmstate_change(const char *name, int running, const char *reason, uint32_t dev_state) " (%s) running %d reason %s device state %d"
vfio_migration_state_notifier(const char *name, const char *state) " (%s) state %s"
vfio_save_setup(const char *name, uint64_t data_buffer_size) " (%s) data buffer size 0x%"PRIx64
vfio_v1_save_setup(const char *name) " (%s)"
vfio_save_cleanup(const char *name) " (%s)"
vfio_save_buffer(const char *name, uint64_t data_offset, uint64_t data_size, uint64_t pending) " (%s) Offset 0x%"PRIx64" size 0x%"PRIx64" pending 0x%"PRIx64
vfio_update_pending(const char *name, uint64_t pending) " (%s) pending 0x%"PRIx64
vfio_save_device_config_state(const char *name) " (%s)"
vfio_state_pending_exact(const char *name, uint64_t precopy, uint64_t postcopy, uint64_t stopcopy_size) " (%s) precopy 0x%"PRIx64" postcopy 0x%"PRIx64" stopcopy size 0x%"PRIx64
vfio_v1_state_pending(const char *name, uint64_t precopy, uint64_t postcopy) " (%s) precopy 0x%"PRIx64" postcopy 0x%"PRIx64
vfio_save_iterate(const char *name, int data_size) " (%s) data_size %d"
vfio_save_complete_precopy(const char *name, int ret) " (%s) ret %d"
vfio_v1_save_complete_precopy(const char *name) " (%s)"
vfio_load_device_config_state(const char *name) " (%s)"
vfio_load_state(const char *name, uint64_t data) " (%s) data 0x%"PRIx64
vfio_v1_load_state_device_data(const char *name, uint64_t data_offset, uint64_t data_size) " (%s) Offset 0x%"PRIx64" size 0x%"PRIx64
vfio_load_state_device_data(const char *name, uint64_t data_size, int ret) " (%s) size 0x%"PRIx64" ret %d"
vfio_load_cleanup(const char *name) " (%s)"
vfio_get_dirty_bitmap(int fd, uint64_t iova, uint64_t size, uint64_t bitmap_size, uint64_t start) "container fd=%d, iova=0x%"PRIx64" size= 0x%"PRIx64" bitmap_size=0x%"PRIx64" start=0x%"PRIx64
vfio_iommu_map_dirty_notify(uint64_t iova_start, uint64_t iova_end) "iommu dirty @ 0x%"PRIx64" - 0x%"PRIx64
vfio_save_block(const char *name, int data_size) " (%s) data_size %d"

5
include/hw/vfio/vfio-common.h
View File

@ -66,6 +66,11 @@ typedef struct VFIOMigration {
int vm_running;
Notifier migration_state;
uint64_t pending_bytes;
uint32_t device_state;
int data_fd;
void *data_buffer;
size_t data_buffer_size;
bool v2;
} VFIOMigration;
typedef struct VFIOAddressSpace {