>-Original Message-
>From: Cédric Le Goater
>Subject: Re: [PATCH v3 04/19] vfio/iommufd: Introduce
>HostIOMMUDeviceIOMMUFDVFIO device
>
>On 4/29/24 08:50, Zhenzhong Duan wrote:
>> HostIOMMUDeviceIOMMUFDVFIO represents a host IOMMU device under
>VFIO
>> iommufd backend. It will be created during VFIO device attaching and
>> passed to vIOMMU.
>>
>> It includes a link to VFIODevice so that we can do VFIO device
>> specific operations, i.e., [at/de]taching hwpt, etc.
>>
>> Signed-off-by: Zhenzhong Duan
>> ---
>> include/hw/vfio/vfio-common.h | 13 +
>> hw/vfio/iommufd.c | 6 +-
>> 2 files changed, 18 insertions(+), 1 deletion(-)
>>
>> diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-
>common.h
>> index aa3abe0a18..0943add3bc 100644
>> --- a/include/hw/vfio/vfio-common.h
>> +++ b/include/hw/vfio/vfio-common.h
>> @@ -32,6 +32,7 @@
>> #include "sysemu/sysemu.h"
>> #include "hw/vfio/vfio-container-base.h"
>> #include "sysemu/host_iommu_device.h"
>> +#include "sysemu/iommufd.h"
>>
>> #define VFIO_MSG_PREFIX "vfio %s: "
>>
>> @@ -159,6 +160,18 @@ struct HostIOMMUDeviceLegacyVFIO {
>> VFIODevice *vdev;
>> };
>>
>> +#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD_VFIO \
>> +TYPE_HOST_IOMMU_DEVICE_IOMMUFD "-vfio"
>> +OBJECT_DECLARE_SIMPLE_TYPE(HostIOMMUDeviceIOMMUFDVFIO,
>> + HOST_IOMMU_DEVICE_IOMMUFD_VFIO)
>> +
>> +/* Abstraction of host IOMMU device with VFIO IOMMUFD backend */
>> +struct HostIOMMUDeviceIOMMUFDVFIO {
>> +HostIOMMUDeviceIOMMUFD parent;
>> +
>> +VFIODevice *vdev;
>
>Seems useless today.
Yes, useless before nesting series, will add in nesting series.
Thanks
Zhenzhong
>
>Thanks,
>
>C.
>
>
>
>> +};
>> +
>> typedef struct VFIODMABuf {
>> QemuDmaBuf buf;
>> uint32_t pos_x, pos_y, pos_updates;
>> diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
>> index 8827ffe636..997f4ac43e 100644
>> --- a/hw/vfio/iommufd.c
>> +++ b/hw/vfio/iommufd.c
>> @@ -639,7 +639,11 @@ static const TypeInfo types[] = {
>> .name = TYPE_VFIO_IOMMU_IOMMUFD,
>> .parent = TYPE_VFIO_IOMMU,
>> .class_init = vfio_iommu_iommufd_class_init,
>> -},
>> +}, {
>> +.name = TYPE_HOST_IOMMU_DEVICE_IOMMUFD_VFIO,
>> +.parent = TYPE_HOST_IOMMU_DEVICE_IOMMUFD,
>> +.instance_size = sizeof(HostIOMMUDeviceIOMMUFDVFIO),
>> +}
>> };
>>
>> DEFINE_TYPES(types)
