Xen ARM TODO: Difference between revisions
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|References=InProgress: http://lists.xen.org/archives/html/xen-devel/2013-10/msg00192.html |
|References=InProgress: http://lists.xen.org/archives/html/xen-devel/2013-10/msg00192.html |
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{{Open Project |
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|Project=Use Superpage mappings for P2M |
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|Desc= |
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Currently we use 4K pages everywhere. Xen should attempt to use 2MB mappings in the P2M wherever possible. |
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This will have significant performance benefits. |
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Need to do 2MB ballooning too. |
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}} |
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{{Open Project |
{{Open Project |
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|Project=Device assignment to DomUs |
|Project=Device assignment to DomUs |
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Revision as of 14:10, 11 December 2013
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
linux v3.8-rc2 boot failed on versatile express
| Contact: xen-devel@lists.xen.org |
| Status: Fixed |
| Description: Linux v3.8-rc2 fails to change the MMC voltage during boot on Versatile Express. |
| References: patch is needed to fix the bug. |
Arndale Board
Guest hang with multi-vcpu
| Contact: xen-devel@lists.xen.org |
| Status: Fixed |
| Description: Hangs on the Arndale board with multi-vcpu guests. |
| References: patch is needed to fix the bug. |
Network doesn't work in the guest
| Contact: julien.grall@citrix.com |
| Status: In progress |
| Description: Network doesn't work in the guest when an ehternet cable is plugged |
| References: http://pastebin.com/gEP3HdCg |
Sometimes Guest can't extract the initramfs
| Contact: xen-devel@lists.xen.org |
| Status: Open |
| Description: When Xen tries to copy data from the guest, it fails to unmap some page because nobody(?) mapped it. |
| References: http://pastebin.com/frbeiuxz |
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
| Contact: xen-devel@lists.xen.org |
| Description: Make VM save/restore and VM migration work on ARM. |
| References: InProgress: http://lists.xen.org/archives/html/xen-devel/2013-10/msg00192.html |
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. |
