Xen Winter Summit: planned discussions

Description

Beyond the main sessions, we'll have time for design discussions. However, we’d like to prepare in advance by identifying major topics and beginning some preliminary brainstorming. We may also use community calls to start organizing these ideas before the event.

Topics

• PVH Dom0 limitations & requirements
  • PCI passthrough
  • SR-IOV
  • Dom0 kernel version needed
  • Perf trade-off?
• Better HVM (QEMU) PCI passthrough: getting Q35 done
  • PCIe is memory mapped, need to get that in Xen. ECAM access trapping and decoding already in Xen for PVH dom0.
  • MSI-X/PBA/registers issue in a same page (TPU Coral issue)
  • Q35 is the best solution instead of hacking PIIX3
  • Q35 should expose an ECAM region
• Better hardware & power management
  • Since XSA 351, you cannot use coretemp modules or similar things in the Dom0 to get hardware data. We probably need to discuss the boundaries between Xen and Dom0 to do things in a secure fashion.