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charset="utf-8" Call VFIO_IOMMU_DIRTY_PAGES ioctl to start and stop dirty pages tracking for VFIO devices. Signed-off-by: Kirti Wankhede Reviewed-by: Dr. David Alan Gilbert --- hw/vfio/migration.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 0dc40e34a4de..d4ba24c2dfae 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -11,6 +11,7 @@ #include "qemu/main-loop.h" #include "qemu/cutils.h" #include +#include =20 #include "sysemu/runstate.h" #include "hw/vfio/vfio-common.h" @@ -391,10 +392,40 @@ static int vfio_load_device_config_state(QEMUFile *f,= void *opaque) return qemu_file_get_error(f); } =20 +static int vfio_set_dirty_page_tracking(VFIODevice *vbasedev, bool start) +{ + int ret; + VFIOMigration *migration =3D vbasedev->migration; + VFIOContainer *container =3D vbasedev->group->container; + struct vfio_iommu_type1_dirty_bitmap dirty =3D { + .argsz =3D sizeof(dirty), + }; + + if (start) { + if (migration->device_state & VFIO_DEVICE_STATE_SAVING) { + dirty.flags =3D VFIO_IOMMU_DIRTY_PAGES_FLAG_START; + } else { + return -EINVAL; + } + } else { + dirty.flags =3D VFIO_IOMMU_DIRTY_PAGES_FLAG_STOP; + } + + ret =3D ioctl(container->fd, VFIO_IOMMU_DIRTY_PAGES, &dirty); + if (ret) { + error_report("Failed to set dirty tracking flag 0x%x errno: %d", + dirty.flags, errno); + return -errno; + } + return ret; +} + static void vfio_migration_cleanup(VFIODevice *vbasedev) { VFIOMigration *migration =3D vbasedev->migration; =20 + vfio_set_dirty_page_tracking(vbasedev, false); + if (migration->region.mmaps) { vfio_region_unmap(&migration->region); } @@ -435,6 +466,11 @@ static int vfio_save_setup(QEMUFile *f, void *opaque) return ret; } =20 + ret =3D vfio_set_dirty_page_tracking(vbasedev, true); + if (ret) { + return ret; + } + qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE); =20 ret =3D qemu_file_get_error(f); --=20 2.7.0