From: Matej Hrica <[email protected]> Add a 'hostmem' property to the vhost-user-gpu which enables the shared memory in the parent object.
Register a container MR in the shmem_list for SHMEM_MAP/UNMAP operations. A container MR is used so that SHMEM_MAP FD-backed subregions each get their own KVM memory slot with the correct backing fd. Suggested-by: Albert Esteve <[email protected]> Reviewed-by: Albert Esteve <[email protected]> Signed-off-by: Matej Hrica <[email protected]> Signed-off-by: Dorinda Bassey <[email protected]> --- hw/display/vhost-user-gpu.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c index 57360898ca0..dbba80c7783 100644 --- a/hw/display/vhost-user-gpu.c +++ b/hw/display/vhost-user-gpu.c @@ -649,6 +649,16 @@ vhost_user_gpu_device_realize(DeviceState *qdev, Error **errp) } g->vhost_gpu_fd = -1; + + /* + * If shared memory is enabled, register the hostmem region for + * SHMEM_MAP/UNMAP operations. + */ + if (virtio_gpu_hostmem_enabled(g->parent_obj.conf)) { + VirtioSharedMemory *shmem = virtio_new_shmem_region( + vdev, VIRTIO_GPU_SHM_ID_HOST_VISIBLE, g->parent_obj.conf.hostmem); + memory_region_add_subregion(&g->parent_obj.hostmem, 0, &shmem->mr); + } } static struct vhost_dev *vhost_user_gpu_get_vhost(VirtIODevice *vdev) @@ -659,6 +669,7 @@ static struct vhost_dev *vhost_user_gpu_get_vhost(VirtIODevice *vdev) static const Property vhost_user_gpu_properties[] = { VIRTIO_GPU_BASE_PROPERTIES(VhostUserGPU, parent_obj.conf), + DEFINE_PROP_SIZE("hostmem", VhostUserGPU, parent_obj.conf.hostmem, 0), }; static void -- 2.52.0
