This is a list of open work items and known bugs for the Xen on ARM with virtualization extension project.
In progress
Known Bugs
Versatile Express
Arndale Board
Open Work Items
vGIC interrupt prioritisation
| Contact: xen-devel@lists.xen.org |
| Description: Currently the vGIC only implements a very basic form of interrupt priority, in particular it is not able to preempt an inflight lower priority interrupt when a new higher priority one occurs. The emulation needs to consider the vCPUs current IAR as well as the priorities of pending and inflight interrupts. |
| References: Not specified, useful references. |
VCPU virtual time support
| Contact: xen-devel@lists.xen.org |
| Description: Currently the concept of virtual time exposed to the guests is very simplistic and is just a static offset from physical time based on the time when the guest was started. We need to consider if this is actually what is needed/wanted and consider cases such as stolen time etc. |
| References: Not specified, useful references. |
IOMMU support in Xen
| Contact: xen-devel@lists.xen.org |
| Description: write a driver in Xen for the ARM System Memory Management Unit (SMMU), use it to assign devices to Dom0. |
| References: Not specified, useful references. |
Save/restore and migration
Use Superpage mappings for P2M
| Contact: xen-devel@lists.xen.org |
| Description: Currently we use 4K pages everywhere. Xen should attempt to use 2MB mappings in the P2M wherever possible.
This will have significant performance benefits.
Need to do 2MB ballooning too. |
| References: Not specified, useful references. |
Device assignment to DomUs
| Contact: xen-devel@lists.xen.org |
| Description: Assign one or more devices to an unprivileged guest, re-program the SMMU accordingly. |
| References: Not specified, useful references. |
Expose Wallclock time to guests
| Contact: xen-devel@lists.xen.org |
| Description: Current Xen on ARM does not popular the wallclock time fields of the shared info with anything useful. It should do so... |
| References: Not specified, useful references. |
