Xen ARM TODO

This is a list of open work items and known bugs for the Xen on ARM with virtualization extension project.

In progress

• Xen 64-bit guests support: http://marc.info/?l=xen-devel&m=136310027317761 by Ian Campbell
• Xen SMP: http://marc.info/?l=xen-devel&m=136256023123214 by Ian Campbell
• Xen guest SMP support: http://marc.info/?l=xen-devel&m=136430925010828 by Stefano Stabellini
• Linux SMP on Xen: http://marc.info/?l=linux-kernel&m=136430893610688&w=2 by Stefano Stabellini
• trap WFI in Xen: http://marc.info/?l=xen-devel&m=136492132108133 by Stefano Stabellini
• Remove hardcoded numbers and addresses in Xen, use device tree for everything. This enables a single Xen binary to boot on multiple platforms (Julien Grall).

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

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.