[Xen-devel] Xen ARM community call - meeting minutes and date for the next one

[Julien Grall <julien.grall@xxxxxxx>]

Hi all,

Below the meeting minutes for the previous Xen community call. Feel free to
reply if I missed some parts.

I suggest to have the next call on the 3rd May at 5PM BST. Any opinions.

Also, do you have any specific topic you would like to talk during this 
call?
Cheers,

== Attendees ==

Stefano, Aporeto
Julien, ARM
Oleksandr, EPAM
Volodymir, EPAM
Edgar, Xilinx
Anasatasios, OnApp

== SMC and EL0 App ==

Some SMC call may be sensitive to latency (e.g power down).

Stefano: We would need to be able to decide whether SMC are emulated in 
EL0 or EL2.
Edgar: Shall I wait EL0 App support before resending the series to 
forward SMC on Zynqmp [1]?
Answer: No need to wait, the current approach is fine for now.

Xen EL0 update from Volodymir:
    * Thread started on xen-devel (see [2])
    * Stefano suggested to create and share a small example
    * Plan -> Post the patches on github + writing document

== IOMMU ==

Xen does not support the generic IOMMU bindings.

ACTION: Needs to be fixed ASAP. Potentially on Xen 4.9?

== Reserve region support in DT ==

Reserve region is not mapped in DOM0, though they should be mapped. DMA 
API will allocate memory for those regions.
There was a discussion about that few months ago (see [3]). This would 
need to be followed-up.
== Cross-compiling ==

Anastasios: We are looking at support Xen in Buildroot. The use case is 
a small initramfs.
Potential task: Keep Xen updated on buildroot. Anastasios could help on 
that.
Stefano: Xen is compiling fine with Yocto.

ACTION: Stefano to write a wiki page about using meta-virtualization on 
Yocto.
Release update
--------------

Stefano might keep a branch around to keep patches which target the next
release.

[1] 
https://lists.xenproject.org/archives/html/xen-devel/2017-02/msg00634.html
[2] 
https://lists.xenproject.org/archives/html/xen-devel/2017-04/msg01002.html
[3] https://lists.xen.org/archives/html/xen-devel/2016-11/msg02295.html

--
Julien Grall

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