Re: [PATCH rfcv1 4/6] vfio: initialize IOMMUFDDevice and pass to vIOMMU

[Joao Martins]

On 15/01/2024 10:13, Zhenzhong Duan wrote:
> diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
> index 9bfddc1360..cbd035f148 100644
> --- a/hw/vfio/iommufd.c
> +++ b/hw/vfio/iommufd.c
> @@ -309,6 +309,7 @@ static int iommufd_cdev_attach(const char *name, 
> VFIODevice *vbasedev,
>      VFIOContainerBase *bcontainer;
>      VFIOIOMMUFDContainer *container;
>      VFIOAddressSpace *space;
> +    IOMMUFDDevice *idev = &vbasedev->idev;
>      struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) };
>      int ret, devfd;
>      uint32_t ioas_id;
> @@ -428,6 +429,7 @@ found_container:
>      QLIST_INSERT_HEAD(&bcontainer->device_list, vbasedev, container_next);
>      QLIST_INSERT_HEAD(&vfio_device_list, vbasedev, global_next);
>  
> +    iommufd_device_init(idev, sizeof(*idev), container->be, vbasedev->devid);
>      trace_iommufd_cdev_device_info(vbasedev->name, devfd, vbasedev->num_irqs,
>                                     vbasedev->num_regions, vbasedev->flags);
>      return 0;

In the dirty tracking series, I'll need to fetch out_capabilities from device
and do a bunch of stuff that is used when allocating hwpt to ask for dirty
tracking. And this means having iommufd_device_init() be called before we call
iommufd_cdev_attach_container().

Here's what it looks based on an earlier version of your patch:

https://github.com/jpemartins/qemu/commit/433f97a05e0cdd8e3b8563aa20e4f22d107219b5

I can move the call earlier in my series, unless there's something specifically
when you call it here?

        Joao