RE: RE: Re: [XenARM] android emulator

[ROSSIER Daniel <Daniel.Rossier@xxxxxxxxxx>]

Hi everyone,

I've just went through the last emails and am also happy to see some 
resurrection on this mailing list.
The EmbeddedXEN project (https://sourceforge.net/projects/embeddedxen/)  is 
going ahead from a couple of months with near 
daily updates on git repository. We have now a running version including both 
XEN and paravirt dom0-linux (2.6.18).

We are about to get a running version of the Xenomai extension on the 
hypervisor (for hard realtime support) as well, but it still requires some 
efforts.
We still have some problems occasionally with some loose of timer/serial 
interrupts from the hypervisor, but we are investigating.

Now, we are also working out a clean separation of guest domains with the 
hypervisor.

Anyway, I just mention again two of my mails dated from last Sept.3 on this 
mailing list regarding page_type and mapcache issues for which I've never
got any answer. We have made a workaround for these two issues to figure out 
the problem; it seems to be quite stable now.

Daniel


> -----Original Message-----
> From: xen-arm-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-arm-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Sang-bum Suh
> Sent: mardi, 20. octobre 2009 03:29
> To: Caz Yokoyama
> Cc: xen-arm@xxxxxxxxxxxxxxxxxxx
> Subject: Re: RE: Re: [XenARM] android emulator
> 
> Hi,
> 
> Thanks but, I cannot use a public server during a development stage of
> Linux stuffs according to a company policy where I work.
> 
> I have a plan to release of Linux kernel at the Xen ARM home page in
> the public domain once it is para-virtualized as you can see it in the
> Xen ARM home page.
> 
> In the future, I hope anyone who works for the sorceforge based ARM
> hypervisor project where you are involved will submit code to the Xen
> ARM project.
> 
> Thanks,
> 
> Sang-bum
> 
> 
> 
> 
> 
> ------- Original Message -------
> Sender : Caz Yokoyama<cazyokoyama@xxxxxxxxx>
> Date   : 2009-10-20 09:45 (GMT+09:00)
> Title  : RE: Re: [XenARM] android emulator
> 
> Hello Sang-bum,
> It is nice to hear from the person who is behind xen-arm. Do you have a
> plan to add public read-only access to your 2.6.27 source code
> repository? I am interested in your progress. If your repository is
> inside of firewall, there are a lot of free public servers. I am using
> sourceforge.net. You can use cvs or svn in sourceforge.net. github.com
> is another one for git.
> -caz
> 
> -----Original Message-----
> From: Sang-bum Suh [mailto:sbuk.suh@xxxxxxxxxxx]
> Sent: Monday, October 19, 2009 5:24 PM
> To: Michael R. Hines; Caz Yokoyama
> Cc: xen-arm@xxxxxxxxxxxxxxxxxxx
> Subject: Re: Re: [XenARM] android emulator
> 
> Hi,
> 
> Excellent !
> 
> The released para-virtualized Linux 2.6.21 kernel for the Xen ARM
> project would run on the Xen ARM on Android emulator.
> However, you may need a patch to run an Android platform on Linux
> kernel
> 2.6.21 and port device drivers
> to Android emulator, as there is a problem with Linux kernel version
> and Android platform.
> 
> Try and download vanila Linux kernel and then update it with Para-virt
> Linux files of the package at http://wiki.xensource.com/xenwiki/XenARM.
> For more details, please refer to section 2.2.2. of the Secure Xen on
> ARM user's guide at the web page.
> 
> FYI, I can release para-virtualized Linux kernel 2.6.27 next year of
> which Linux kernel version does not need such Android patch.
> 
> Thanks,
> 
> Sang-bum
> 
> 
> 
> 
> 
> ------- Original Message -------
> Sender : Michael R. Hines<michael@xxxxxxxxxxxx>
> Date   : 2009-10-20 08:19 (GMT+09:00)
> Title  : Re: [XenARM] android emulator
> 
> Actually, I got it to work. The problem was that that I was compiling
> on a 64-bit version of the ARM-ported emulator instead of a 32-bit
> version, so I logged into a 32-bit machine and attempted to compile it.
> 
> However, there was one snag before it worked: a patch is needed:
> 
> --- Taken from http://code.google.com/p/android/issues/detail?id=838
> 
> 1.) A -msse2 cflags is missing in Makefile.target which make
> _mm_add_si64 cannot be found:
> /android-emulator-20080826/qemu/skins/skin_argb.h:286: warning:
> implicit declaration of function '_mm_add_si64'
> /android-emulator-20080826/qemu/skins/skin_argb.h:286: error:
> incompatible types in assignment
> 
> 2.) The error comment in build-emulator.sh is wrong.
> 
> Patch:
> --- qemu.orig/Makefile.target 2008-08-29 10:01:41.000000000 +0800
> +++ qemu/Makefile.target      2008-08-29 10:01:24.000000000 +0800
> @@ -39,7 +39,7 @@ endif
> 
>  ifeq ($(ARCH),i386)
>  OP_CFLAGS=$(CFLAGS) -O2 -fomit-frame-pointer
> -CFLAGS+=-DUSE_MMX -mmmx
> +CFLAGS+=-DUSE_MMX -mmmx -msse2
>  ifneq ($(CONFIG_DARWIN),yes)
>  OP_CFLAGS+= -mpreferred-stack-boundary=2  else
> 
> 
> Once I applied this on a 32-bit Ubuntu 9.04 server box, the compile
> succeeded and the two mini-os domains started running inside the
> emulator.
> 
> Cool stuff! Thank you very much for your quick response.
> 
> What is the possibility of getting a full linux-2.6.21-arm running
> inside the emulator?
> 
> Is that possible right now?
> 
> - Michael
> 
> Caz Yokoyama wrote:
> > Hello Michael,
> > What optimization option do you use? -O2? -O0? Don't use -O0. You
> will
> have
> > segfault. Could you run backtrace command on segfault? In addition,
> > please provide more detail of your environment.
> > -caz
> > P.S. You may not hear from anybody other than me. This is a very
> quiet
> > mailing list.
> >
> > -----Original Message-----
> > From: xen-arm-bounces@xxxxxxxxxxxxxxxxxxx
> > [mailto:xen-arm-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Michael R.
> > Hines
> > Sent: Monday, October 19, 2009 12:58 PM
> > To: xen-arm@xxxxxxxxxxxxxxxxxxx
> > Subject: [XenARM] android emulator
> >
> > Greetings,
> >
> > I have followed all the instructions in the Secure XenARM manual and
> I
> > went through section A.2 on how to build XenARM for the Android
> > emulator. I successfully built the arm-port of Xen as well as the
> > arm-port of mini-os and I built the patched version of QEMU 0.82.
> >
> > When I tried to run the emulator, I get a segfault - From what I can
> > tell, the fault occurs at the very first instruction when QEMU
> > attempts to start running the Xen hypervisor.
> >
> > Here is the output of a sample GDB session:
> >
> > $ gdb emulator
> > $ (gdb) run -guest0 0x01c00000 mini-os.elf -guest1 0x02c00000
> > mini-os.elf -show-kernel -system ./images -shell -qemu -s Starting
> > program: ../android-emulator-xen_arm/emulator -guest0 0x01c00000
> > mini-os.elf -guest1 0x02c00000 mini-os.elf -show-kernel -system
> > ./images  -shell -qemu -s [Thread debugging using libthread_db
> > enabled] guest0 - mini-os.elf
> > guest1 - mini-os.elf
> > [New Thread 0x7f32a807c6f0 (LWP 5913)] [New Thread 0x7f329e9f0950
> (LWP
> > 5916)] [New Thread 0x7f329e1ef950 (LWP 5917)] Waiting gdb connection
> > on port 1234
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread 0x7f32a807c6f0 (LWP 5913)] 0x0000000000000000 in
> > ?? ()
> > (gdb)
> >
> >
> > Any ideas on where I could start debugging this? Or are there updated
> > patches to make this work?
> >
> >
> 
> --
> /*
>  * Michael R. Hines
>  * Post-Doc, Dept. of Computer Science
>  * http://www.cs.columbia.edu/~mhines/
>  * Live long and prosper...
>  */
> 
> 
> 
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> 
> 
> 
> 


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