Xen ARM TODO: Difference between revisions
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== In progress == |
== In progress == |
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* Xen 64-bit guests support: http://marc.info/?l=xen-devel&m=136310027317761 by Ian Campbell |
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* Xen SMP: http://marc.info/?l=xen-devel&m=136256023123214 by Ian Campbell |
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* Xen guest SMP support: http://marc.info/?l=xen-devel&m=136430925010828 by Stefano Stabellini |
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* Linux SMP on Xen: http://marc.info/?l=linux-kernel&m=136430893610688&w=2 by Stefano Stabellini |
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* trap WFI in Xen: http://marc.info/?l=xen-devel&m=136492132108133 by Stefano Stabellini |
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* 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). |
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== Known Bugs == |
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* Linux v3.8-rc2 fails to change the MMC voltage during boot on Versatile Express, a [http://marc.info/?l=linux-kernel&m=135843574114719&w=2 patch] is needed to fix the bug. |
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* Hangs on the Arndale board with multi-vcpu guests: [http://marc.info/?l=xen-devel&m=136510786507930| fix] by Julien Grall |
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== Open Work Items == |
== Open Work Items == |
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{{Open Project |
{{Open Project |
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|Project= |
|Project=Save/restore and migration |
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|Desc= |
|Desc= |
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| ⚫ | |||
write a driver in Xen for the ARM System Memory Management Unit (SMMU), use it to assign devices to Dom0. |
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|References=An initial prototype was written a couple of years ago for arm32 but never completed: http://lists.xen.org/archives/html/xen-devel/2014-06/msg02076.html |
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}} |
}} |
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{{Open Project |
{{Open Project |
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|Project= |
|Project=PCI device assignment to DomUs |
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|Desc= |
|Desc= |
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| ⚫ | |||
Xen or the Xen tools (ie. XL) should be able to generate the device tree for the guest automatically. |
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}} |
}} |
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{{Open Project |
{{Open Project |
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|Project= |
|Project=ITS support |
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|Contact=Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
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|Desc= |
|Desc= |
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Physical and virtual ITS support for GICv3. |
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Introduce Xen support for ARMv8 in Linux. |
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|References=Work underway: http://marc.info/?i=1426775889-29442-1-git-send-email-vijay.kilari%40gmail.com |
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}} |
}} |
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{{Open Project |
{{Open Project |
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|Project= |
|Project=More flexible early printk support |
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|Desc=Allow a single Xen binary to support multiple platforms for early_printk |
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|Desc= |
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Rather than parsing the DTB early in asm to get the command line it would probably be sufficient to have a magic hex byte at a specific offset which could be edited by a simple tool. |
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| ⚫ | |||
|References=http://lists.xen.org/archives/html/xen-devel/2014-02/msg01880.html |
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}} |
}} |
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{{Open Project |
{{Open Project |
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|Project= |
|Project=Investigation on HCR.FB |
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|Desc=Setting HCR.FB will upgrade local flush instructions (TLB, instruction cache, branch predictor) to innershareable. It would be nice to benchmark the performance impact on a UP-aware kernel and see if this could be reduced by flushing when a vCPU is migrating to another physical CPUs. |
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|Desc= |
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|References=http://lists.xen.org/archives/html/xen-devel/2016-04/msg03157.html |
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| ⚫ | |||
}} |
}} |
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[[Category:XenARM]] |
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Latest revision as of 10:22, 27 April 2016
This is a list of open work items and known bugs for the Xen on ARM with virtualization extension project.
In progress
Open Work Items
Save/restore and migration
| Contact: xen-devel@lists.xen.org |
| Description: Make VM save/restore and VM migration work on ARM. |
| References: An initial prototype was written a couple of years ago for arm32 but never completed: http://lists.xen.org/archives/html/xen-devel/2014-06/msg02076.html |
PCI 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. |
ITS support
| Contact: xen-devel@lists.xen.org |
| Description: Physical and virtual ITS support for GICv3. |
| References: Work underway: http://marc.info/?i=1426775889-29442-1-git-send-email-vijay.kilari%40gmail.com |
More flexible early printk support
| Contact: xen-devel@lists.xen.org |
| Description: Allow a single Xen binary to support multiple platforms for early_printk Rather than parsing the DTB early in asm to get the command line it would probably be sufficient to have a magic hex byte at a specific offset which could be edited by a simple tool. |
| References: http://lists.xen.org/archives/html/xen-devel/2014-02/msg01880.html |
Investigation on HCR.FB
| Contact: xen-devel@lists.xen.org |
| Description: Setting HCR.FB will upgrade local flush instructions (TLB, instruction cache, branch predictor) to innershareable. It would be nice to benchmark the performance impact on a UP-aware kernel and see if this could be reduced by flushing when a vCPU is migrating to another physical CPUs. |
| References: http://lists.xen.org/archives/html/xen-devel/2016-04/msg03157.html |
