2022-03-30 Project Stratos Meeting
- Alex Bennée
Date
Mar 30, 2022
Participants
@Alex Bennée
@Mathieu Poirier
@Bill Mills
@Arnd Bergmann
@Viresh Kumar
@Mike Holmes
@Matt Spencer (Deactivated)
@Vincent Guittot
Christopher Clark
@Don Harbin
@Peter Griffin
Srinivas Ramana
@Tim Benton
@François Ozog (Deactivated)
@Randy Linnell
Agenda
Reminder date change: 29/3/22 (Wednesday afternoons, every two weeks)
Follow-up on Xen sys crate
Follow-up on vhost-user work
Discussion
VK: Rust based i2c on Xen, PoC
Dom0 host kernel, with backend
DomU guest kernel
vhost-master from crate + bits from cloud hypervisor
linked in with EPAMs PoC virtio work
AB: we could create a shadow FD after the fact and pass that
AJB: any example of this
AB: KVM?
AJB: talked about irqfd/eventfs redirection: ORKO-8: Native notification support for ioreq regionsClosed
AB: You can have FD sharing the vma sctructure
similar to fork semantics
MP: xen-sys crate double buffering working
nested memory buffers
now looking at Xen Foreign Map API
CC: hasn’t been able to talk to Doug
had changes been addressed?
MP: yes
MP: quiet since Jan
what about the Xen Test Framework
MP: only used to exercise the hypercalls
MP: basically want to know if he cares to go on
AJB: talked about our thoughts about where to host repo
we are ering towards hosting it in rust-vmm
CC: like the idea of being maintained in the community
BM: Where any changes available to the guest
AJB:
BM: when do we get to virtio-iommu?
needed for the limited memory interface
AB: thinks the iommu translation gets in the way
would need new code to support this in guest kernel
BM: fixed region will be the first limited memory visibility
will be used for the A/R hetrogenous modesl
VG: fixed region works well but SCMI only uses small descriptors
AB: still need copy in copy out
AB: iommu models makes more sense for fixed maps
e.g. static frame buffers
stable mappings
AB: some progress being made on fat virtqueue