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

[Volodymyr Babchuk <vlad.babchuk@xxxxxxxxx>]

Hello guys,

I'm following the OP-TEE discussion.
At [1] you can find my patch series for OP-TEE calls handling. It is
very old thing, but it worked (and even had nice features like ability
to handle domain crash in the middle of OP-TEE session).
If you want latest version, just take a look at [2]. There are not all
features implemented. My estimation is that full handler will be 3-4
times bigger (about 1000-1500 lines of code, I think).

[1] https://github.com/lorc/xen/commits/staging-4.7
[2] 
https://github.com/lorc/xen/blob/f0f22838a63b5c29b21a1dc2d3f5db81323aa3ac/xen/arch/arm/optee/smc.c


On 2 May 2017 at 21:00, Julien Grall <julien.grall@xxxxxxx> wrote:
> Hi all,
>
> A quick reminder, the Community Call will be tomorrow (Wednesday 3rd May) at
> 5PM BST.
>
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>
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> Regards,
>
>
> On 20/04/17 17:44, Julien Grall wrote:
>>
>> 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



-- 
WBR Volodymyr Babchuk aka lorc [+380976646013]
mailto: vlad.babchuk@xxxxxxxxx

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