LinuxCon + ContainerCon + CloudOpen China 2018

Shared Virtual Memory in KVM (Liu Yi, Intel) - Shared Virtual Memory is a hardware extension which allows directly access CPU virtual address, thus enables fast workload submission on accelerators. This feature goes with PCI sig Process Address Space ID (PASID). Many hardware vendors (Intel, AMD, ARM, etc.) have made it a key feature in their platform. It has become a hot area about bringing aforementioned feature to a virtualized environment, which brings flexibility to the accelerator deployment in data center.

In this presentation, Yi Liu will first introduce basic concept of SVM and the hardware requirement of SVM. Then, the session would focus on the SVM virtualization(vSVM) and architecture design in KVM solution. There would be detail technical introduction to the overall flow of vSVM and IOMMU API extensions(new APIs like bind_pasid_tbl/sva_tlb_invalidate and general in-kernel fault report framework). In the end, there would be an update of the vSVM status in community and future work.