On 04.06.19 08:15, Xiong, Lei (CT RDA FOA ART-CN1) wrote:
Dear Jan
Thanks for your guidance
I have another question, in the " Setup on Banana Pi ARM board", it mentioned that " The
kernel requires a small patch in order to build the Jailhouse driver module", the file of "
arch/arm/kernel/armksyms.c " need to modified.
My understanding for this is as following:
1 git clone
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
2 cd ~/linux-stable
3 git checkout v4.3.3
4 Modify the " arch/arm/kernel/armksyms.c " manually by VIM.
5 for i in ../bananian/kernel/4.3.3/patches/*; do patch -p1 < $i; done
6 .......
Is my understanding right?
That description is unfortunately rather old. Meanwhile, we have maintained
LTS-based kernel tree with all needed patches included, see
https://github.com/siemens/linux/commits/jailhouse-enabling/4.19[-rt]. A newer
kernel on such an old board also means that it will "just work" because board
support is properly integrated into upstream by now.
Jan
-----Original Message-----
From: Jan Kiszka [mailto:[email protected]]
Sent: Tuesday, June 4, 2019 2:03 PM
To: Xiong, Lei (CT RDA FOA ART-CN1)
Cc: [email protected]
Subject: Re: How to disable CONFIG_VIDEO in the U-Boot config
On 04.06.19 07:47, Xiong, Lei (CT RDA FOA ART-CN1) wrote:
Dear Jan
In fact, my hardware platform is banana PI M1+, I do not find "Banana Pi M1+" in the
" images.list ".
Is there a jailhouse-images supported for "Banana Pi M1+"?
Not explicitly. We support the classic Orange Pi Zero, but that is also
A20-based. Maybe you can use that image on the M1+ as well, only tuning some
boot parameters and using different Jailhouse configs (all available ones are
being installed) in the end. I don't have such board in reach to cross-check,
unfortunately.
In general, ARMv7-based setups with Jailhouse need to be considered more as
demonstrations than as production platforms. Those SOCs typically lack SMMUs
that you need for full isolation, and most activities on ARM-side now go into
v8 designs.
Jan
Thanks you very much~
-----Original Message-----
From: Jan Kiszka [mailto:[email protected]]
Sent: Tuesday, June 4, 2019 1:14 PM
To: Xiong, Lei (CT RDA FOA ART-CN1)
Subject: Re: How to disable CONFIG_VIDEO in the U-Boot config
On 04.06.19 07:10, Jan Kiszka wrote:
Hi Lei Xiong,
On 04.06.19 02:46, Xiong, Lei wrote:
Dear colleagues,
In the “Setup on Banana Pi ARM board” part, it mentioned that
“*since v2015.10, you need to disable CONFIG_VIDEO in the U-Boot
config*, or U-Boot will configure the framebuffer at the end of the
physical RAM where Jailhouse is located.”
My question is that how to disable CONFIG_VIDEO in the U-Boot
config?**
Via "make menuconfig" during the manual u-boot build - which the
description is not covering in details. If you do not want to fiddle
with that, I can warmly recommend jailhouse-images [1] and a board that is
supported by it out of the box.
Jan
[1] https://github.com/siemens/jailhouse-images
...and we can also discuss directly if you have further questions.
That said, generic discussions via the mailing list are always very
much appreciated as they strengthen the community. Thanks for taking that route!
Jan
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Siemens AG, Corporate Technology, CT RDA IOT SES-DE Corporate Competence Center
Embedded Linux
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