On 2016-03-14 19:52, Marcel Apfelbaum wrote: > On 03/12/2016 06:13 PM, Aviv B.D. wrote: >> From: "Aviv B.D." <bd.a...@gmail.com <mailto:bd.a...@gmail.com>> >> >> * Fix bug that prevent qemu from starting up when vIOMMU and VFIO >> device are present. >> * Advertise Cache Mode capability in iommu cap register.
For the final version: Please keep that feature optional, for the sake of emulation accuracy (no modern hw exposes it any more). Maybe turn it one once a vfio device is in the scope of the IOMMU? >> * Register every VFIO device with IOMMU state. >> * On page cache invalidation in vIOMMU, check if the domain belong to >> VFIO device and mirror the guest requests to host. >> >> Not working (Yet!): >> * Tested only with network interface card (ixgbevf) and >> intel_iommu=strict in guest's kernel command line. >> * Lock up under high load. >> * Errors on guest poweroff. >> * High relative latency compare to VFIO without IOMMU. > > Adding (possibly) interested developers to the thread. Thanks, Jan -- Siemens AG, Corporate Technology, CT RDA ITP SES-DE Corporate Competence Center Embedded Linux
