Xen ARM TODO: Difference between revisions

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== Open Work Items ==
== Open Work Items ==

{{Open Project
|Project=vGIC interrupt prioritisation
|Desc=
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.
}}

{{Open Project
|Project=VCPU virtual time support
|Desc=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.
}}


{{Open Project
{{Open Project

Revision as of 09:51, 1 May 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.

Autogenerate DomU's device trees
Contact: xen-devel@lists.xen.org
Description: Xen or the Xen tools (ie. XL) should be able to generate the device tree for the guest automatically.
References: Not specified, useful references.

Linux 64-bit on Xen
Contact: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Description: Introduce Xen support for ARMv8 in Linux.
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: 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.
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