Re: [Xen-users] Android-PVH direct kernel booting

[Kun Cheng <chengkunck@xxxxxxxxx>]

I have also found a lot posts in google complaining the same mistake.

A recent one complaining the grub2 didnt find anroid-x86, see: https://grokbase.com/t/gg/android-x86/126wpgwwab/boot-grub2-problems

Also I have seen people complaining some certain releases got suck in booting.

Hope those can be useful.

Kun Cheng <chengkunck@xxxxxxxxx> 于2019年9月2日周一 上午11:44写道：

Sorry for the late reply. I was travelling in the last a couple of days.  

Rajagopal Aravindan <a.rajagopal.81@xxxxxxxxx> 于2019年8月29日周四 下午12:35写道：

Hello Kun,

Thanks for your reply.

>>Have you compelled android on x86 machine and tried to run it on a x86 platform too? In that case, you need android on x86 support.

Yes, I downloaded Android-x86 code and prepared iso_img.

I am able to natively install the iso_img and my x86_64 boots fine into Android-x86.  

Then, I tried installing from the iso_img in my Xen HVM guest, using a raw disk image file (loopback mounting).

This also works fine and I am able to boot my Xen HVM guest into Android-x86.

Now, I am trying to convert my HVM into a PVH guest and do direct kernel boot (dkb) by loopback mounting the raw disk image file.

Which is when I am running into ""Detecting Android x86 ...".

PFA the dkb config file.

Any inputs would be very helpful.

 

I have limited experience with direct kernel boot. I usually use that (and netboot) to create a complete new vm, which seems to be quite different from the way you use it.

For pv support in HVMs, I do think mainstream linux kernels should be okay, as pv drivers are already merged since 2.6.

But I have little knowledge about aosp-x86. Can you confirm the pv drivers are there and compiled in the kernel built for the image which you have been using?

 

>>If you are cross compelling android, then you need to check your toolchain. Also I am not sure if you can run arm guest domain on a x86 platform.

Once I meet with success on x86, would be trying this next.

Thanks,

Rajagopal

On Thu, Aug 29, 2019 at 8:09 AM Kun Cheng <chengkunck@xxxxxxxxx> wrote:

Hello Rajagopal,

Some quick thoughts.

1. Have you compelled android on x86 machine and tried to run it on a x86 platform too? In that case, you need android on x86 support.

2. If you are cross compelling android, then you need to check your toolchain. Also I am not sure if you can run arm guest domain on a x86 platform.

Regards,

Kun

发件人: Rajagopal Aravindan

发送时间: 8月29日星期四 上午1:46

主题: Fwd: Android-PVH direct kernel booting

收件人: chengkunck@xxxxxxxxx, denisobrezkov@xxxxxxxxx

抄送: xen-users@xxxxxxxxxxxxxxxxxxxx

Hello Denis & Kun,

Any thoughts on the below mail, please ?

Once I get Android to direct kernel boot as Dom-U on x86, I  shall try the same on OdroidXU4.

Thanks in  advance,

Rajagopal

---------- Forwarded message ---------

From: Rajagopal Aravindan <a.rajagopal.81@xxxxxxxxx>

Date: Tue, Aug 27, 2019 at 12:16 AM

Subject: Android-PVH direct kernel booting

To: <xen-users@xxxxxxxxxxxxxxxxxxxx>

Hello Xen,

I built an Android ISO with PVH enabled and installed it in HVM mode.

Now, I am trying to convert it into a PVH using direct kernel booting.

But, while attempting to boot, booting gets stuck at "Detecting Android x86 ......."

PFA my config file.

Can someone please point me in the right direction, for getting this to work ?

Using the above method I am able to boot into Ubuntu, though.

Thanks,

Rajagopal

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