RE: [PATCH v4 01/23] iommufd/viommu: Add driver-allocated vDEVICE support

From: Nicolin Chen nicolinc@nvidia.com Sent: Friday, May 9, 2025 11:02 AM

+#define iommufd_vdevice_alloc(viommu, drv_struct, member) \

• ({ \

• drv_struct *ret;                                               \
  

• 							       \
  

• static_assert(__same_type(struct iommufd_viommu,
  

*viommu)); \

• static_assert(__same_type(struct iommufd_vdevice,              \
  

• 			  ((drv_struct *)NULL)->member));
  

\

• static_assert(offsetof(drv_struct, member.obj) == 0);          \
  

• ret = (drv_struct *)_iommufd_object_alloc(                     \
  

• 	viommu->ictx, sizeof(drv_struct),
  

IOMMUFD_OBJ_VDEVICE);\

• if (!IS_ERR(ret)) {                                            \
  

• 	ret->member.viommu = viommu;                           \
  

• 	ret->member.ictx = viommu->ictx;                       \
  

• }                                                              \
  

• ret;                                                           \
  

• })

viommu->ictx is set in patch5, so logically this is better put after that.

Reviewed-by: Kevin Tian kevin.tian@intel.com