From: Longpeng <longpeng2@xxxxxxxxxx> To support generic vdpa deivce[1], we need add the following ioctls: - GET_CONFIG_SIZE: the size of the virtio config space (Patch 1) - GET_VQS_COUNT: the count of virtqueues that exposed (Patch 2) Changes v1(RFC) -> v2: Patch 1: - be more verbose in commit message and the comment for get_config_size [Jason] Patch 2: - change the type of nvqs to u32 [Jason] Patch 3: - drop from this series because Gautam sent another proposal[2] [1] https://lore.kernel.org/all/20220105005900.860-1-longpeng2@xxxxxxxxxx/ [2] https://patchwork.kernel.org/project/kvm/patch/20220224212314.1326-20-gdawar@xxxxxxxxxx/ Longpeng (2): vdpa: support exposing the config size to userspace vdpa: support exposing the count of vqs to userspace drivers/vdpa/vdpa.c | 6 +++--- drivers/vhost/vdpa.c | 40 ++++++++++++++++++++++++++++++++++++---- include/linux/vdpa.h | 9 +++++---- include/uapi/linux/vhost.h | 7 +++++++ 4 files changed, 51 insertions(+), 11 deletions(-) -- 1.8.3.1