Hi, The optional PRE_COPY state support for migration feature is introduced by this series here[1](Thanks for that!). This is something HiSilicon ACC driver can make use for early dev compatibility checks and have made an attempt in the past here[2]. Adding this will speed up reporting the compatibility error early in the migration process without the need to wait for complete data transfer. This is sanity tested on a HiSilicon Platform. Please take a look. Regards, Shameer 1.https://lore.kernel.org/all/20221106174630.25909-1-yishaih@xxxxxxxxxx/ 2.https://lore.kernel.org/kvm/20220302172903.1995-8-shameerali.kolothum.thodi@xxxxxxxxxx/ Shameer Kolothum (4): hisi_acc_vfio_pci: Add support for precopy IOCTL hisi_acc_vfio_pci: Introduce support for PRE_COPY state transitions hisi_acc_vfio_pci: Move the dev compatibility tests for early check hisi_acc_vfio_pci: Enable PRE_COPY flag .../vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 147 ++++++++++++++++-- .../vfio/pci/hisilicon/hisi_acc_vfio_pci.h | 2 + 2 files changed, 133 insertions(+), 16 deletions(-) -- 2.34.1
