[PATCH v2 08/11] vfio/migration: Remove VFIO migration protocol v1
Philippe Mathieu-Daudé
f4bug at amsat.org
Mon Sep 19 09:41:02 UTC 2022
On Mon, May 30, 2022 at 7:56 PM Avihai Horon <avihaih at nvidia.com> wrote:
>
> Now that v2 protocol implementation has been added, remove the
> deprecated v1 implementation.
Worth a note in docs/about/deprecated.rst?
> Signed-off-by: Avihai Horon <avihaih at nvidia.com>
> ---
> hw/vfio/common.c | 19 +-
> hw/vfio/migration.c | 698 +---------------------------------
> hw/vfio/trace-events | 5 -
> include/hw/vfio/vfio-common.h | 5 -
> 4 files changed, 24 insertions(+), 703 deletions(-)
>
> diff --git a/hw/vfio/common.c b/hw/vfio/common.c
> index 5541133ec9..00c6cb0ffe 100644
> --- a/hw/vfio/common.c
> +++ b/hw/vfio/common.c
> @@ -355,14 +355,7 @@ static bool vfio_devices_all_dirty_tracking(VFIOContainer *container)
> return false;
> }
>
> - 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) &&
> + if ((vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF) &&
> (migration->device_state == VFIO_DEVICE_STATE_RUNNING ||
> migration->device_state == VFIO_DEVICE_STATE_RUNNING_P2P)) {
> return false;
> @@ -393,14 +386,8 @@ static bool vfio_devices_all_running_and_mig_active(VFIOContainer *container)
> return false;
> }
>
> - if (!migration->v2 &&
> - migration->device_state_v1 & VFIO_DEVICE_STATE_V1_RUNNING) {
> - continue;
> - }
> -
> - if (migration->v2 &&
> - (migration->device_state == VFIO_DEVICE_STATE_RUNNING ||
> - migration->device_state == VFIO_DEVICE_STATE_RUNNING_P2P)) {
> + if (migration->device_state == VFIO_DEVICE_STATE_RUNNING ||
> + migration->device_state == VFIO_DEVICE_STATE_RUNNING_P2P) {
> continue;
> } else {
> return false;
> diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
> index de68eadb09..852759e6ca 100644
> --- a/hw/vfio/migration.c
> +++ b/hw/vfio/migration.c
> @@ -121,220 +121,6 @@ static int vfio_migration_set_state(VFIODevice *vbasedev,
> return 0;
> }
>
> -static inline int vfio_mig_access(VFIODevice *vbasedev, void *val, int count,
> - off_t off, bool iswrite)
> -{
> - int ret;
> -
> - ret = iswrite ? pwrite(vbasedev->fd, val, count, off) :
> - pread(vbasedev->fd, val, count, off);
> - if (ret < count) {
> - error_report("vfio_mig_%s %d byte %s: failed at offset 0x%"
> - HWADDR_PRIx", err: %s", iswrite ? "write" : "read", count,
> - vbasedev->name, off, strerror(errno));
> - return (ret < 0) ? ret : -EINVAL;
> - }
> - return 0;
> -}
> -
> -static int vfio_mig_rw(VFIODevice *vbasedev, __u8 *buf, size_t count,
> - off_t off, bool iswrite)
> -{
> - int ret, done = 0;
> - __u8 *tbuf = buf;
> -
> - while (count) {
> - int bytes = 0;
> -
> - if (count >= 8 && !(off % 8)) {
> - bytes = 8;
> - } else if (count >= 4 && !(off % 4)) {
> - bytes = 4;
> - } else if (count >= 2 && !(off % 2)) {
> - bytes = 2;
> - } else {
> - bytes = 1;
> - }
> -
> - ret = vfio_mig_access(vbasedev, tbuf, bytes, off, iswrite);
> - if (ret) {
> - return ret;
> - }
> -
> - count -= bytes;
> - done += bytes;
> - off += bytes;
> - tbuf += bytes;
> - }
> - return done;
> -}
> -
> -#define vfio_mig_read(f, v, c, o) vfio_mig_rw(f, (__u8 *)v, c, o, false)
> -#define vfio_mig_write(f, v, c, o) vfio_mig_rw(f, (__u8 *)v, c, o, true)
> -
> -#define VFIO_MIG_STRUCT_OFFSET(f) \
> - offsetof(struct vfio_device_migration_info, f)
> -/*
> - * Change the device_state register for device @vbasedev. Bits set in @mask
> - * are preserved, bits set in @value are set, and bits not set in either @mask
> - * or @value are cleared in device_state. If the register cannot be accessed,
> - * the resulting state would be invalid, or the device enters an error state,
> - * an error is returned.
> - */
> -
> -static int vfio_migration_v1_set_state(VFIODevice *vbasedev, uint32_t mask,
> - uint32_t value)
> -{
> - VFIOMigration *migration = vbasedev->migration;
> - VFIORegion *region = &migration->region;
> - off_t dev_state_off = region->fd_offset +
> - VFIO_MIG_STRUCT_OFFSET(device_state);
> - uint32_t device_state;
> - int ret;
> -
> - ret = vfio_mig_read(vbasedev, &device_state, sizeof(device_state),
> - dev_state_off);
> - if (ret < 0) {
> - return ret;
> - }
> -
> - device_state = (device_state & mask) | value;
> -
> - if (!VFIO_DEVICE_STATE_VALID(device_state)) {
> - return -EINVAL;
> - }
> -
> - ret = vfio_mig_write(vbasedev, &device_state, sizeof(device_state),
> - dev_state_off);
> - if (ret < 0) {
> - int rret;
> -
> - rret = vfio_mig_read(vbasedev, &device_state, sizeof(device_state),
> - dev_state_off);
> -
> - if ((rret < 0) || (VFIO_DEVICE_STATE_IS_ERROR(device_state))) {
> - hw_error("%s: Device in error state 0x%x", vbasedev->name,
> - device_state);
> - return rret ? rret : -EIO;
> - }
> - return ret;
> - }
> -
> - migration->device_state_v1 = device_state;
> - trace_vfio_migration_set_state(vbasedev->name, device_state);
> - return 0;
> -}
> -
> -static void *get_data_section_size(VFIORegion *region, uint64_t data_offset,
> - uint64_t data_size, uint64_t *size)
> -{
> - void *ptr = NULL;
> - uint64_t limit = 0;
> - int i;
> -
> - if (!region->mmaps) {
> - if (size) {
> - *size = MIN(data_size, region->size - data_offset);
> - }
> - return ptr;
> - }
> -
> - for (i = 0; i < region->nr_mmaps; i++) {
> - VFIOMmap *map = region->mmaps + i;
> -
> - if ((data_offset >= map->offset) &&
> - (data_offset < map->offset + map->size)) {
> -
> - /* check if data_offset is within sparse mmap areas */
> - ptr = map->mmap + data_offset - map->offset;
> - if (size) {
> - *size = MIN(data_size, map->offset + map->size - data_offset);
> - }
> - break;
> - } else if ((data_offset < map->offset) &&
> - (!limit || limit > map->offset)) {
> - /*
> - * data_offset is not within sparse mmap areas, find size of
> - * non-mapped area. Check through all list since region->mmaps list
> - * is not sorted.
> - */
> - limit = map->offset;
> - }
> - }
> -
> - if (!ptr && size) {
> - *size = limit ? MIN(data_size, limit - data_offset) : data_size;
> - }
> - return ptr;
> -}
> -
> -static int vfio_save_buffer(QEMUFile *f, VFIODevice *vbasedev, uint64_t *size)
> -{
> - VFIOMigration *migration = vbasedev->migration;
> - VFIORegion *region = &migration->region;
> - uint64_t data_offset = 0, data_size = 0, sz;
> - int ret;
> -
> - ret = vfio_mig_read(vbasedev, &data_offset, sizeof(data_offset),
> - region->fd_offset + VFIO_MIG_STRUCT_OFFSET(data_offset));
> - if (ret < 0) {
> - return ret;
> - }
> -
> - ret = vfio_mig_read(vbasedev, &data_size, sizeof(data_size),
> - region->fd_offset + VFIO_MIG_STRUCT_OFFSET(data_size));
> - if (ret < 0) {
> - return ret;
> - }
> -
> - trace_vfio_save_buffer(vbasedev->name, data_offset, data_size,
> - migration->pending_bytes);
> -
> - qemu_put_be64(f, data_size);
> - sz = data_size;
> -
> - while (sz) {
> - void *buf;
> - uint64_t sec_size;
> - bool buf_allocated = false;
> -
> - buf = get_data_section_size(region, data_offset, sz, &sec_size);
> -
> - if (!buf) {
> - buf = g_try_malloc(sec_size);
> - if (!buf) {
> - error_report("%s: Error allocating buffer ", __func__);
> - return -ENOMEM;
> - }
> - buf_allocated = true;
> -
> - ret = vfio_mig_read(vbasedev, buf, sec_size,
> - region->fd_offset + data_offset);
> - if (ret < 0) {
> - g_free(buf);
> - return ret;
> - }
> - }
> -
> - qemu_put_buffer(f, buf, sec_size);
> -
> - if (buf_allocated) {
> - g_free(buf);
> - }
> - sz -= sec_size;
> - data_offset += sec_size;
> - }
> -
> - ret = qemu_file_get_error(f);
> -
> - if (!ret && size) {
> - *size = data_size;
> - }
> -
> - bytes_transferred += data_size;
> - return ret;
> -}
> -
> static int vfio_load_buffer(QEMUFile *f, VFIODevice *vbasedev,
> uint64_t data_size)
> {
> @@ -351,96 +137,6 @@ static int vfio_load_buffer(QEMUFile *f, VFIODevice *vbasedev,
> return 0;
> }
>
> -static int vfio_v1_load_buffer(QEMUFile *f, VFIODevice *vbasedev,
> - uint64_t data_size)
> -{
> - VFIORegion *region = &vbasedev->migration->region;
> - uint64_t data_offset = 0, size, report_size;
> - int ret;
> -
> - do {
> - ret = vfio_mig_read(vbasedev, &data_offset, sizeof(data_offset),
> - region->fd_offset + VFIO_MIG_STRUCT_OFFSET(data_offset));
> - if (ret < 0) {
> - return ret;
> - }
> -
> - if (data_offset + data_size > region->size) {
> - /*
> - * If data_size is greater than the data section of migration region
> - * then iterate the write buffer operation. This case can occur if
> - * size of migration region at destination is smaller than size of
> - * migration region at source.
> - */
> - report_size = size = region->size - data_offset;
> - data_size -= size;
> - } else {
> - report_size = size = data_size;
> - data_size = 0;
> - }
> -
> - trace_vfio_v1_load_state_device_data(vbasedev->name, data_offset, size);
> -
> - while (size) {
> - void *buf;
> - uint64_t sec_size;
> - bool buf_alloc = false;
> -
> - buf = get_data_section_size(region, data_offset, size, &sec_size);
> -
> - if (!buf) {
> - buf = g_try_malloc(sec_size);
> - if (!buf) {
> - error_report("%s: Error allocating buffer ", __func__);
> - return -ENOMEM;
> - }
> - buf_alloc = true;
> - }
> -
> - qemu_get_buffer(f, buf, sec_size);
> -
> - if (buf_alloc) {
> - ret = vfio_mig_write(vbasedev, buf, sec_size,
> - region->fd_offset + data_offset);
> - g_free(buf);
> -
> - if (ret < 0) {
> - return ret;
> - }
> - }
> - size -= sec_size;
> - data_offset += sec_size;
> - }
> -
> - ret = vfio_mig_write(vbasedev, &report_size, sizeof(report_size),
> - region->fd_offset + VFIO_MIG_STRUCT_OFFSET(data_size));
> - if (ret < 0) {
> - return ret;
> - }
> - } while (data_size);
> -
> - return 0;
> -}
> -
> -static int vfio_update_pending(VFIODevice *vbasedev)
> -{
> - VFIOMigration *migration = vbasedev->migration;
> - VFIORegion *region = &migration->region;
> - uint64_t pending_bytes = 0;
> - int ret;
> -
> - ret = vfio_mig_read(vbasedev, &pending_bytes, sizeof(pending_bytes),
> - region->fd_offset + VFIO_MIG_STRUCT_OFFSET(pending_bytes));
> - if (ret < 0) {
> - migration->pending_bytes = 0;
> - return ret;
> - }
> -
> - migration->pending_bytes = pending_bytes;
> - trace_vfio_update_pending(vbasedev->name, pending_bytes);
> - return 0;
> -}
> -
> static int vfio_save_device_config_state(QEMUFile *f, void *opaque)
> {
> VFIODevice *vbasedev = opaque;
> @@ -493,15 +189,6 @@ static void vfio_migration_cleanup(VFIODevice *vbasedev)
> migration->data_fd = -1;
> }
>
> -static void vfio_migration_v1_cleanup(VFIODevice *vbasedev)
> -{
> - VFIOMigration *migration = vbasedev->migration;
> -
> - if (migration->region.mmaps) {
> - vfio_region_unmap(&migration->region);
> - }
> -}
> -
> /* ---------------------------------------------------------------------- */
>
> static int vfio_save_setup(QEMUFile *f, void *opaque)
> @@ -516,49 +203,6 @@ static int vfio_save_setup(QEMUFile *f, void *opaque)
> return qemu_file_get_error(f);
> }
>
> -static int vfio_v1_save_setup(QEMUFile *f, void *opaque)
> -{
> - VFIODevice *vbasedev = opaque;
> - VFIOMigration *migration = vbasedev->migration;
> - int ret;
> -
> - trace_vfio_save_setup(vbasedev->name);
> -
> - qemu_put_be64(f, VFIO_MIG_FLAG_DEV_SETUP_STATE);
> -
> - if (migration->region.mmaps) {
> - /*
> - * Calling vfio_region_mmap() from migration thread. Memory API called
> - * from this function require locking the iothread when called from
> - * outside the main loop thread.
> - */
> - qemu_mutex_lock_iothread();
> - ret = vfio_region_mmap(&migration->region);
> - qemu_mutex_unlock_iothread();
> - if (ret) {
> - error_report("%s: Failed to mmap VFIO migration region: %s",
> - vbasedev->name, strerror(-ret));
> - error_report("%s: Falling back to slow path", vbasedev->name);
> - }
> - }
> -
> - ret = vfio_migration_v1_set_state(vbasedev, VFIO_DEVICE_STATE_MASK,
> - VFIO_DEVICE_STATE_V1_SAVING);
> - if (ret) {
> - error_report("%s: Failed to set state SAVING", vbasedev->name);
> - return ret;
> - }
> -
> - qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE);
> -
> - ret = qemu_file_get_error(f);
> - if (ret) {
> - return ret;
> - }
> -
> - return 0;
> -}
> -
> static void vfio_save_cleanup(void *opaque)
> {
> VFIODevice *vbasedev = opaque;
> @@ -567,82 +211,6 @@ static void vfio_save_cleanup(void *opaque)
> trace_vfio_save_cleanup(vbasedev->name);
> }
>
> -static void vfio_v1_save_cleanup(void *opaque)
> -{
> - VFIODevice *vbasedev = opaque;
> -
> - vfio_migration_v1_cleanup(vbasedev);
> - trace_vfio_save_cleanup(vbasedev->name);
> -}
> -
> -static void vfio_save_pending(QEMUFile *f, void *opaque,
> - uint64_t threshold_size,
> - uint64_t *res_precopy_only,
> - uint64_t *res_compatible,
> - uint64_t *res_postcopy_only)
> -{
> - VFIODevice *vbasedev = opaque;
> - VFIOMigration *migration = vbasedev->migration;
> - int ret;
> -
> - ret = vfio_update_pending(vbasedev);
> - if (ret) {
> - return;
> - }
> -
> - *res_precopy_only += migration->pending_bytes;
> -
> - trace_vfio_save_pending(vbasedev->name, *res_precopy_only,
> - *res_postcopy_only, *res_compatible);
> -}
> -
> -static int vfio_save_iterate(QEMUFile *f, void *opaque)
> -{
> - VFIODevice *vbasedev = opaque;
> - VFIOMigration *migration = vbasedev->migration;
> - uint64_t data_size;
> - int ret;
> -
> - qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE);
> -
> - if (migration->pending_bytes == 0) {
> - ret = vfio_update_pending(vbasedev);
> - if (ret) {
> - return ret;
> - }
> -
> - if (migration->pending_bytes == 0) {
> - qemu_put_be64(f, 0);
> - qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE);
> - /* indicates data finished, goto complete phase */
> - return 1;
> - }
> - }
> -
> - ret = vfio_save_buffer(f, vbasedev, &data_size);
> - if (ret) {
> - error_report("%s: vfio_save_buffer failed %s", vbasedev->name,
> - strerror(errno));
> - return ret;
> - }
> -
> - qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE);
> -
> - ret = qemu_file_get_error(f);
> - if (ret) {
> - return ret;
> - }
> -
> - /*
> - * Reset pending_bytes as .save_live_pending is not called during savevm or
> - * snapshot case, in such case vfio_update_pending() at the start of this
> - * function updates pending_bytes.
> - */
> - migration->pending_bytes = 0;
> - trace_vfio_save_iterate(vbasedev->name, data_size);
> - return 0;
> -}
> -
> /* Returns 1 if end-of-stream is reached, 0 if more data and -1 if error */
> static int vfio_save_block(QEMUFile *f, VFIOMigration *migration)
> {
> @@ -706,62 +274,6 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque)
> return 0;
> }
>
> -static int vfio_v1_save_complete_precopy(QEMUFile *f, void *opaque)
> -{
> - VFIODevice *vbasedev = opaque;
> - VFIOMigration *migration = vbasedev->migration;
> - uint64_t data_size;
> - int ret;
> -
> - ret = vfio_migration_v1_set_state(vbasedev, ~VFIO_DEVICE_STATE_V1_RUNNING,
> - VFIO_DEVICE_STATE_V1_SAVING);
> - if (ret) {
> - error_report("%s: Failed to set state STOP and SAVING",
> - vbasedev->name);
> - return ret;
> - }
> -
> - ret = vfio_update_pending(vbasedev);
> - if (ret) {
> - return ret;
> - }
> -
> - while (migration->pending_bytes > 0) {
> - qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE);
> - ret = vfio_save_buffer(f, vbasedev, &data_size);
> - if (ret < 0) {
> - error_report("%s: Failed to save buffer", vbasedev->name);
> - return ret;
> - }
> -
> - if (data_size == 0) {
> - break;
> - }
> -
> - ret = vfio_update_pending(vbasedev);
> - if (ret) {
> - return ret;
> - }
> - }
> -
> - qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE);
> -
> - ret = qemu_file_get_error(f);
> - if (ret) {
> - return ret;
> - }
> -
> - ret = vfio_migration_v1_set_state(vbasedev, ~VFIO_DEVICE_STATE_V1_SAVING,
> - 0);
> - if (ret) {
> - error_report("%s: Failed to set state STOPPED", vbasedev->name);
> - return ret;
> - }
> -
> - trace_vfio_save_complete_precopy(vbasedev->name);
> - return ret;
> -}
> -
> static void vfio_save_state(QEMUFile *f, void *opaque)
> {
> VFIODevice *vbasedev = opaque;
> @@ -783,33 +295,6 @@ static int vfio_load_setup(QEMUFile *f, void *opaque)
> vbasedev->migration->device_state);
> }
>
> -static int vfio_v1_load_setup(QEMUFile *f, void *opaque)
> -{
> - VFIODevice *vbasedev = opaque;
> - VFIOMigration *migration = vbasedev->migration;
> - int ret = 0;
> -
> - if (migration->region.mmaps) {
> - ret = vfio_region_mmap(&migration->region);
> - if (ret) {
> - error_report("%s: Failed to mmap VFIO migration region %d: %s",
> - vbasedev->name, migration->region.nr,
> - strerror(-ret));
> - error_report("%s: Falling back to slow path", vbasedev->name);
> - }
> - }
> -
> - ret = vfio_migration_v1_set_state(vbasedev, ~VFIO_DEVICE_STATE_MASK,
> - VFIO_DEVICE_STATE_V1_RESUMING);
> - if (ret) {
> - error_report("%s: Failed to set state RESUMING", vbasedev->name);
> - if (migration->region.mmaps) {
> - vfio_region_unmap(&migration->region);
> - }
> - }
> - return ret;
> -}
> -
> static int vfio_load_cleanup(void *opaque)
> {
> VFIODevice *vbasedev = opaque;
> @@ -819,15 +304,6 @@ static int vfio_load_cleanup(void *opaque)
> return 0;
> }
>
> -static int vfio_v1_load_cleanup(void *opaque)
> -{
> - VFIODevice *vbasedev = opaque;
> -
> - vfio_migration_v1_cleanup(vbasedev);
> - trace_vfio_load_cleanup(vbasedev->name);
> - return 0;
> -}
> -
> static int vfio_load_state(QEMUFile *f, void *opaque, int version_id)
> {
> VFIODevice *vbasedev = opaque;
> @@ -861,11 +337,7 @@ static int vfio_load_state(QEMUFile *f, void *opaque, int version_id)
> uint64_t data_size = qemu_get_be64(f);
>
> if (data_size) {
> - if (vbasedev->migration->v2) {
> - ret = vfio_load_buffer(f, vbasedev, data_size);
> - } else {
> - ret = vfio_v1_load_buffer(f, vbasedev, data_size);
> - }
> + ret = vfio_load_buffer(f, vbasedev, data_size);
> if (ret < 0) {
> return ret;
> }
> @@ -896,18 +368,6 @@ static SaveVMHandlers savevm_vfio_handlers = {
> .load_state = vfio_load_state,
> };
>
> -static SaveVMHandlers savevm_vfio_v1_handlers = {
> - .save_setup = vfio_v1_save_setup,
> - .save_cleanup = vfio_v1_save_cleanup,
> - .save_live_pending = vfio_save_pending,
> - .save_live_iterate = vfio_save_iterate,
> - .save_live_complete_precopy = vfio_v1_save_complete_precopy,
> - .save_state = vfio_save_state,
> - .load_setup = vfio_v1_load_setup,
> - .load_cleanup = vfio_v1_load_cleanup,
> - .load_state = vfio_load_state,
> -};
> -
> /* ---------------------------------------------------------------------- */
>
> static void vfio_vmstate_change(void *opaque, bool running, RunState state)
> @@ -938,70 +398,12 @@ static void vfio_vmstate_change(void *opaque, bool running, RunState state)
> new_state);
> }
>
> -static void vfio_v1_vmstate_change(void *opaque, bool running, RunState state)
> -{
> - VFIODevice *vbasedev = opaque;
> - VFIOMigration *migration = vbasedev->migration;
> - uint32_t value, mask;
> - int ret;
> -
> - if (vbasedev->migration->vm_running == running) {
> - return;
> - }
> -
> - if (running) {
> - /*
> - * Here device state can have one of _SAVING, _RESUMING or _STOP bit.
> - * Transition from _SAVING to _RUNNING can happen if there is migration
> - * failure, in that case clear _SAVING bit.
> - * Transition from _RESUMING to _RUNNING occurs during resuming
> - * phase, in that case clear _RESUMING bit.
> - * In both the above cases, set _RUNNING bit.
> - */
> - mask = ~VFIO_DEVICE_STATE_MASK;
> - value = VFIO_DEVICE_STATE_V1_RUNNING;
> - } else {
> - /*
> - * Here device state could be either _RUNNING or _SAVING|_RUNNING. Reset
> - * _RUNNING bit
> - */
> - mask = ~VFIO_DEVICE_STATE_V1_RUNNING;
> -
> - /*
> - * When VM state transition to stop for savevm command, device should
> - * start saving data.
> - */
> - if (state == RUN_STATE_SAVE_VM) {
> - value = VFIO_DEVICE_STATE_V1_SAVING;
> - } else {
> - value = 0;
> - }
> - }
> -
> - ret = vfio_migration_v1_set_state(vbasedev, mask, value);
> - if (ret) {
> - /*
> - * Migration should be aborted in this case, but vm_state_notify()
> - * currently does not support reporting failures.
> - */
> - error_report("%s: Failed to set device state 0x%x", vbasedev->name,
> - (migration->device_state_v1 & mask) | value);
> - if (migrate_get_current()->to_dst_file) {
> - qemu_file_set_error(migrate_get_current()->to_dst_file, ret);
> - }
> - }
> - vbasedev->migration->vm_running = running;
> - trace_vfio_vmstate_change(vbasedev->name, running, RunState_str(state),
> - (migration->device_state_v1 & mask) | value);
> -}
> -
> static void vfio_migration_state_notifier(Notifier *notifier, void *data)
> {
> MigrationState *s = data;
> VFIOMigration *migration = container_of(notifier, VFIOMigration,
> migration_state);
> VFIODevice *vbasedev = migration->vbasedev;
> - int ret;
>
> trace_vfio_migration_state_notifier(vbasedev->name,
> MigrationStatus_str(s->state));
> @@ -1011,31 +413,14 @@ static void vfio_migration_state_notifier(Notifier *notifier, void *data)
> case MIGRATION_STATUS_CANCELLED:
> case MIGRATION_STATUS_FAILED:
> bytes_transferred = 0;
> - if (migration->v2) {
> - 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);
> - }
> - }
> + vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_RUNNING,
> + VFIO_DEVICE_STATE_ERROR);
> }
> }
>
> static void vfio_migration_exit(VFIODevice *vbasedev)
> {
> - VFIOMigration *migration = vbasedev->migration;
> -
> - if (migration->v2) {
> - g_free(migration->data_buffer);
> - } else {
> - vfio_region_exit(&migration->region);
> - vfio_region_finalize(&migration->region);
> - }
> + g_free(vbasedev->migration->data_buffer);
> g_free(vbasedev->migration);
> vbasedev->migration = NULL;
> }
> @@ -1066,7 +451,6 @@ static int vfio_migration_init(VFIODevice *vbasedev)
> VFIOMigration *migration;
> char id[256] = "";
> g_autofree char *path = NULL, *oid = NULL;
> - struct vfio_region_info *info = NULL;
> uint64_t mig_flags;
>
> if (!vbasedev->ops->vfio_get_object) {
> @@ -1079,48 +463,20 @@ static int vfio_migration_init(VFIODevice *vbasedev)
> }
>
> 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->data_buffer_size = VFIO_MIG_DATA_BUFFER_SIZE;
> - vbasedev->migration->data_buffer =
> - g_malloc0(vbasedev->migration->data_buffer_size);
> - vbasedev->migration->data_fd = -1;
> - vbasedev->migration->v2 = true;
> - } else {
> - /* 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);
> -
> - 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;
> - }
> + if (ret) {
> + return ret;
> + }
>
> - g_free(info);
> + /* Basic migration functionality must be supported */
> + if (!(mig_flags & VFIO_MIGRATION_STOP_COPY)) {
> + return -EOPNOTSUPP;
> }
>
> + vbasedev->migration = g_new0(VFIOMigration, 1);
> + vbasedev->migration->data_buffer_size = VFIO_MIG_DATA_BUFFER_SIZE;
> + vbasedev->migration->data_buffer =
> + g_malloc0(vbasedev->migration->data_buffer_size);
> + vbasedev->migration->data_fd = -1;
> migration = vbasedev->migration;
> migration->vbasedev = vbasedev;
>
> @@ -1132,28 +488,16 @@ static int vfio_migration_init(VFIODevice *vbasedev)
> }
> strpadcpy(id, sizeof(id), path, '\0');
>
> - 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);
> - }
> + 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);
> migration->migration_state.notify = vfio_migration_state_notifier;
> add_migration_state_change_notifier(&migration->migration_state);
> - return 0;
>
> -err:
> - g_free(info);
> - vfio_migration_exit(vbasedev);
> - return ret;
> + return 0;
> }
>
> /* ---------------------------------------------------------------------- */
> diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events
> index 6e8c5958b9..a24ea7d8b0 100644
> --- a/hw/vfio/trace-events
> +++ b/hw/vfio/trace-events
> @@ -154,15 +154,10 @@ vfio_vmstate_change(const char *name, int running, const char *reason, uint32_t
> vfio_migration_state_notifier(const char *name, const char *state) " (%s) state %s"
> vfio_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_save_pending(const char *name, uint64_t precopy, uint64_t postcopy, uint64_t compatible) " (%s) precopy 0x%"PRIx64" postcopy 0x%"PRIx64" compatible 0x%"PRIx64
> -vfio_save_iterate(const char *name, int data_size) " (%s) data_size %d"
> vfio_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) " (%s) size 0x%"PRIx64
> 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
> diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
> index 2ec3346fea..76d470178f 100644
> --- a/include/hw/vfio/vfio-common.h
> +++ b/include/hw/vfio/vfio-common.h
> @@ -61,16 +61,11 @@ typedef struct VFIORegion {
> typedef struct VFIOMigration {
> struct VFIODevice *vbasedev;
> VMChangeStateEntry *vm_state;
> - VFIORegion region;
> - uint32_t device_state_v1;
> - int vm_running;
> Notifier migration_state;
> - uint64_t pending_bytes;
> enum vfio_device_mig_state device_state;
> int data_fd;
> void *data_buffer;
> size_t data_buffer_size;
> - bool v2;
> } VFIOMigration;
>
> typedef struct VFIOAddressSpace {
> --
> 2.21.3
>
>
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