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vfio/migration: Query device dirty page tracking support

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Now that everything has been set up for device dirty page tracking,
query the device for device dirty page tracking support.

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20230307125450.62409-15-joao.m.martins@oracle.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Joao Martins 2023-03-07 12:54:49 +00:00 committed by Alex Williamson
parent e46883204c
commit 95b29658b6
1 changed files with 15 additions and 0 deletions
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15
hw/vfio/migration.c
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@ -555,6 +555,19 @@ static int vfio_migration_query_flags(VFIODevice *vbasedev, uint64_t *mig_flags)
return 0;
}
static bool vfio_dma_logging_supported(VFIODevice *vbasedev)
{
uint64_t buf[DIV_ROUND_UP(sizeof(struct vfio_device_feature),
sizeof(uint64_t))] = {};
struct vfio_device_feature *feature = (struct vfio_device_feature *)buf;
feature->argsz = sizeof(buf);
feature->flags = VFIO_DEVICE_FEATURE_PROBE |
VFIO_DEVICE_FEATURE_DMA_LOGGING_START;
return !ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature);
}
static int vfio_migration_init(VFIODevice *vbasedev)
{
int ret;
@ -589,6 +602,8 @@ static int vfio_migration_init(VFIODevice *vbasedev)
migration->device_state = VFIO_DEVICE_STATE_RUNNING;
migration->data_fd = -1;
vbasedev->dirty_pages_supported = vfio_dma_logging_supported(vbasedev);
oid = vmstate_if_get_id(VMSTATE_IF(DEVICE(obj)));
if (oid) {
path = g_strdup_printf("%s/vfio", oid);