auxd

ARM auxd 支持

提交历史

• https://patchwork.kernel.org/project/kvm/patch/20190213040301.23021-4-baolu.lu@linux.intel.com/
• https://lore.kernel.org/all/20220216025249.3459465-9-baolu.lu@linux.intel.com/
• https://patchwork.kernel.org/project/linux-arm-kernel/patch/20190610184714.6786-7-jean-philippe.brucker@arm.com/

https://lore.kernel.org/all/20210924155705.4258-11-hch@lst.de/

靠，然后又删除了，这么看来不是的 https://lore.kernel.org/all/20220216025249.3459465-9-baolu.lu@linux.intel.com/

The aux-domain related interfaces and iommu_ops are not referenced anywhere in the tree. We’ve also reached a consensus to redesign it based the new iommufd framework. Remove them to avoid dead code.

https://lore.kernel.org/all/20211014053839.727419-7-baolu.lu@linux.intel.com/#r https://lore.kernel.org/r/20210929072030.1330225-1-baolu.lu@linux.intel.com https://lore.kernel.org/r/20211014053839.727419-7-baolu.lu@linux.intel.com

aux 原始想法的来源

• Hardware-Assisted Mediated Pass-Through with VFIO

• ADI : Assignable Device Interfaces

• VDCM : Virtual Device Composition Module

• One device can attach to multiple domains
  • A primary domain used for DMA-API
  • Multiple auxillary domains used for mdev instances
• ‘aux’ is a device attribute instead of domain attribute
  • Same domain may represent as ‘primary’ to deviceA and ‘aux’ to deviceB
  • ‘primary’ vs. ‘aux’ is decided at domain attach time
  • Device driver enables ‘aux’ capability on device before attaching domain

https://patchwork.kernel.org/project/kvm/cover/20190213040301.23021-1-baolu.lu@linux.intel.com/

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