Re: [GSoC] Xen on ARM: create multiple guests from device tree

[Luca Miccio <lucmiccio@gmail.com>]

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Hi Stefano,
sorry if i am so late but my schedule was full this week. I am currently preparing a presentation for an event here
in Italy and i had no time to check even my emails.

> Il giorno 29 mar 2017, alle ore 02:13, Stefano Stabellini <sstabellini@kernel.org> ha scritto:
> 
> On Tue, 28 Mar 2017, Stefano Stabellini wrote:
>> Hello Luca,
>> 
>> did you manage to make any progress on the number of cores exposed by the model?
>> 
I am still not using the psci and the XEN console says that he is bringing up all the 4 CPUs.
>> Thank you for the Makefile patch! If you have time, I encourage you to
>> fix one of the other small outstanding bugs, for example XEN-20 or
>> XEN-11 (just the ability to load a Dom0 kernel bigger than 128MB or just
>> the ability to parse the new image_size field introduced in Linux 3.17).
>> 
I will try to give it a look this weekend but i am not sure to have the time to
make e fix soon. 
>> Finally, I would like to remind you of the upcoming deadline for
>> applications submissions, which is the 3rd of April for GSoC, see:
>> 
>> http://marc.info/?l=xen-devel&m=149071502330534
>> 
>> The GSoC application system is
>> https://summerofcode.withgoogle.com/get-started/.
>> 
>> Please give a look at the Xen Project application template here:
>> 
>> https://wiki.xenproject.org/wiki/GSoC_Student_Application_Template
>> 
>> It also includes an "Implementation Plan", where you have the chance to
>> explain the implementation plan for the project you would like to apply
>> for.
> 
> FYI I added some more information on this project here:
> http://marc.info/?l=xen-devel&m=149074542307880 <http://marc.info/?l=xen-devel&m=149074542307880>
> 

Thank you for all the information. Unfortunately I have not considered all of my personal deadlines
before attempting to approach this project. It was my mistake. Anyway I will try with all my strength
to fill up the application this weekend and try to submit it anyway. I like the Xen project, and even if
I will not be chosen for this task, surely I will continue to support and follow it diligently.

> 
>> 
>> On Thu, 23 Mar 2017, Luca Miccio wrote:
>>> Hello Julien
>>>> Il giorno 23 mar 2017, alle ore 15:49, Julien Grall <julien.grall@arm.com> ha scritto:
>>>> 
>>>> Hello Luca,
>>>> 
>>>> On 23/03/17 02:23, Luca Miccio wrote:
>>>>> I tried also this method but i had the same error. So i came up with the
>>>>> idea of removing the
>>>>> psci method from the configure and also from the dtsi file that i have
>>>>> changed.
>>>> 
>>>> I guess you are using only 1 core in this case. Am I right?
>>>> 
>>> No, i am using 4 cores, with —cores option and i think that i am using actually 4 cores
>>> because on the model “control panel” i have 4 green triangles which ones of them should
>>> represent the number of cores and their status. 
>>> It is only my opinion so, please, tell me if i am wrong.
>>>>> 
>>>>> With this configuration the model booted up correctly, even if the
>>>>> process took about 10 minutes.
>>>>> Just for my personal knowledge: it is normal that the boot is very slow?
>>>>> Is the rootfs that i’m using?
>>>> 
>>>> Booting a full distro on the model can be slow. Usually I write my own initscript to start the necessary daemon and skip systemd.
>>>> 
>>>> 42sh> cat /root/init.sh
>>>> 
>>>> set -x
>>>> mount -t proc proc  /proc
>>>> mount -t devtmpfs dev /dev
>>>> 
>>>> export HOME=/root
>>>> 
>>>> rm -rf /var/run/xenstore
>>>> rm -rf /var/run/xen
>>>> 
>>>> /etc/init.d/xencommons start
>>>> 
>>>> exec /bin/bash
>>>> 
>>>> -------------------
>>>> 
>>>> And I pass init=/root/init.sh on the Linux kernel command line.
>>>> 
>>> That helped a lot, thank you.
>>>> Cheers,
>>>> 
>>>> -- 
>>>> Julien Grall
>>> 
>>> Luca.
Thank you,
Luca


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