[Qemu-devel] [Intel-gfx][RFC 6/9] drm/i915/gvt: Introduce new flag to indicate migration capability

[Yulei Zhang]

New device flag VFIO_DEVICE_FLAGS_MIGRATABLE is added for vfio mdev
device vGPU to claim the capability for live migration.

Signed-off-by: Yulei Zhang <address@hidden>
---
 drivers/gpu/drm/i915/gvt/kvmgt.c | 1 +
 include/uapi/linux/vfio.h        | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index d2b13ae..c44b319 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -940,6 +940,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, 
unsigned int cmd,
 
                info.flags = VFIO_DEVICE_FLAGS_PCI;
                info.flags |= VFIO_DEVICE_FLAGS_RESET;
+               info.flags |= VFIO_DEVICE_FLAGS_MIGRATABLE;
                info.num_regions = VFIO_PCI_NUM_REGIONS;
                info.num_irqs = VFIO_PCI_NUM_IRQS;
 
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index ae46105..9ad9ce1 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -199,6 +199,7 @@ struct vfio_device_info {
 #define VFIO_DEVICE_FLAGS_PLATFORM (1 << 2)    /* vfio-platform device */
 #define VFIO_DEVICE_FLAGS_AMBA  (1 << 3)       /* vfio-amba device */
 #define VFIO_DEVICE_FLAGS_CCW  (1 << 4)        /* vfio-ccw device */
+#define VFIO_DEVICE_FLAGS_MIGRATABLE (1 << 5)   /* Device supports migrate */
        __u32   num_regions;    /* Max region index + 1 */
        __u32   num_irqs;       /* Max IRQ index + 1 */
 };
-- 
2.7.4