Re: [Qemu-devel] [Consult] microblaze: About running upstream main branch qemu

[Chen Gang]

At present, I use telnet (without password), login to microblaze qemu
successfully! :-)

 - I compile busy box with the glibc in orginal 'ramfs', so get telnetd:
   use new busybox replace the old one, and add symbol link 'telnetd' to
   busybox in "/bin".

 - configure qemu with network support (device "xlnx.xps-ethernetlite").

   yum install libvirt
   yum install tunctl
   tunctl -b
   ip link set tap0 up
   brctl addif virbr0 tap0
   ./microblaze-softmmu/qemu-system-microblaze -M petalogix-s3adsp1800 \
     -kernel ../linux-stable.microblaze/arch/microblaze/boot/linux.bin \
     -no-reboot -append "console=ttyUL0,115200 doreboot" -nographic \
     -net nic,vlan=0,model=xlnx.xps-ethernetlite,macaddr=00:16:35:AF:94:00 \
     -net tap,vlan=0,ifname=tap0,script=no,downscript=no

 - fix a kernel bug: add "xlnx,xps-ethernetlite-2.00.b" for compatible
   with its firmware (can find it under "/sys/firmware..../compatible",
   within microblaze qemu bash environments). Related diff:

   diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c 
b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
   index 28dbbdc..298fad3 100644
   --- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
   +++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
   @@ -1236,6 +1236,7 @@ static struct of_device_id xemaclite_of_match[] = {
           { .compatible = "xlnx,opb-ethernetlite-1.01.b", },
           { .compatible = "xlnx,xps-ethernetlite-1.00.a", },
           { .compatible = "xlnx,xps-ethernetlite-2.00.a", },
   +       { .compatible = "xlnx,xps-ethernetlite-2.00.b", },
           { .compatible = "xlnx,xps-ethernetlite-2.01.a", },
           { .compatible = "xlnx,xps-ethernetlite-3.00.a", },
           { /* end of list */ },

Next, I shall send related kernel patch for upstream kernel, and continue
for microbaze DejaGNU with microbaze qemu, and sorry again, I did not
finish it within this month.


Thanks.



On 10/30/14 22:20, Chen Gang wrote:
> On 10/27/14 22:47, Chen Gang wrote:
>>
>> After a little try, I succeed run microblaze under upstream qemu 2.1.2
>> and upstream Linux kernel 3.17-rc7, with the xilinux own ramdisk:
>> "microblaze_complete.cpio.gz". :-)
>>
>> Compiler is "gcc version 4.9.1 20140717 (Red Hat Cross 4.9.1-1) (GCC)"
>> for microblaze, and "gcc version 4.8.3 20140624 (Red Hat 4.8.3-1) (GCC)"
>> for x86_64 qemu.
>>
>> Next I shall try to use virtio file to share the local data to virtual
>> guest (I guess, it should be OK).
>>
> 
> I finished testing the microblaze hello world program with both dynamic
> glibc and static glibc under qemu (I put it to 'ramfs' manualy, and it
> runs well)  :-)
> 
> Next, I need focus on networking (I have found qemu related device, and
> kernel related device, and I also know, it needs telnetd in busy box).
> But sorry, it seems I can not finish within this month :-(
> 
>  - I wasted much time resources on choosing qemu or sim, next I should
>    notice about it (do not waste time, again).
> 
>  - and another excuse is: I have to do it in my free time (within 2.5
>    hours per day, in average). My current job is not related with it
>    (at present, it is about Global Platform Java applet for iPhone OS).
> 
> Next month:
> 
>  - I should finish microblaze qemu test under DejaGNU, should finish
>    within next month (2014-11-30).
> 
>  - I also shall start tile cross compiling for gcc/binutils, and use it
>    to Linux kernel, and test it with qemu. I shall try to finish them
>    within 2 months (finish before 2014-12-31).
> 
>  - At least, finish 1 patch for gcc, 1 patch for binutils, 1 patch for
>    qemu/kvm/xen, 3 patches for kernel, within next month (2014-11-30).
> 
> 
> Welcome any ideas, suggestions or completions (especially for net device,
> net drivers, busy box for telnet ...).
> 
> Thanks.
> 
> 
>>
>> Thanks again!
>>
>>
>>
>> On 10/27/2014 09:47 AM, Chen Gang wrote:
>>> On 10/26/14 21:28, Chen Gang wrote:
>>>> Hello Guenter Roeck:
>>>>
>>>> I still shall try qemu and kernel distribution, next, since it can do
>>>> it successfully (whether 'sim' can be success or not).
>>>>
>>>
>>> I got confirmation from microblaze members, at present, microblaze sim
>>> can not full simulate entire system, so I shall try qemu and kernel
>>> distribution for it (which can do full simulation for microblaze).
>>>
>>> I shall try my best to finish it within this month.
>>>
>>> Thanks.
>>>
>>>> But excuse me, maybe I can not finish microblaze qemu test within this
>>>> month, hope I can finish within next month (2014-11-30).
>>>>
>>>> Thank your information about qemu, again.
>>>>
>>>>
>>>> Thanks.
>>>>
>>>> On 10/22/2014 08:28 AM, Chen Gang wrote:
>>>>> OK, thanks, there are multiple branches in upstream qemu. Sorry
>>>>> for my original said, and I can only say: for upstream  develop
>>>>> master branch, it does not support microblaze.
>>>>>
>>>>> Excuse me, I does not mainly focus on only using qemu, and I
>>>>> also found another easier way for test microblaze toolchain (use sim of 
>>>>> binutils). So next, I will mainly focus on sim.
>>>>>
>>>>> I also met some issues for sim, but I guess, I can analyze it,
>>>>> maybe also have chances to make patch for it (that is the main
>>>>> reason why I want to focus on it).
>>>>>
>>>>> Thanks.
>>>>>
>>>>> Send from Lenovo A788t.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Guenter Roeck <address@hidden> wrote:
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Oct 21, 2014 at 06:41:14PM +0800, Chen Gang wrote:
>>>>>> On 10/21/14 12:37, Guenter Roeck wrote:
>>>>>>> On 10/20/2014 08:23 AM, Chen Gang wrote:
>>>>>>>> On 10/19/2014 10:58 PM, Guenter Roeck wrote:
>>>>>>>>>
>>>>>>>>> This doesn't use devicetree, but the configurations are known to be 
>>>>>>>>> working
>>>>>>>>> with kernel releases all the way back to kernel version 3.10.
>>>>>>>>>
>>>>>>>>
>>>>>>>> Yeah, really it is !
>>>>>>>>
>>>>>>>> After try upstream qemu and upstream kernel, for me, neither them can
>>>>>>>> work well. For xilinx qemu with xilinux kernel, it should be well,
>>>>>>>> although I still met issue below, is what I have done incorrect?
>>>>>>>>
>>>>>>>
>>>>>>> Difficult to say.
>>>>>>>
>>>>>>> I use gcc 4.8.0 from kernel.org and qemu 2.1.2 with its default 
>>>>>>> configuration
>>>>>>> for the microblaze big endian target. No idea if that makes a 
>>>>>>> difference,
>>>>>>> but I would suggest to start with those.
>>>>>>>
>>>>>>> For microblazeel I use gcc 4.9.1 built with buildroot 2014.08 for both
>>>>>>> kernel and initramfs. Initramfs for that target is built from busybox.
>>>>>>>
>>>>>>
>>>>>> OK, thank you very much for your information.
>>>>>>
>>>>>> But sorry, I have to stop trying, because that is far from upstream qemu
>>>>>> and upstream kernel (at present, I have no enough time resource on it).
>>>>>>
>>>>>> My original goal is "use upstream microblaze qemu to test upstream gcc,
>>>>>> binutils and glibc of microblaze". And now I find another ways: "use sim
>>>>>> which is in upstream binutils to perform the related test".
>>>>>>
>>>>> You lost me. qemu 2.1.2 is the upstream qemu, and I do use upstream 
>>>>> binutils
>>>>> (2.24 if I recall corectly) as well as upstream gcc and upstream kernel.
>>>>> Did I indicate otherwise in anything I said ? FWIW, should be able to use
>>>>> qemu from distributions without recompiling it.
>>>>>
>>>>> Thanks,
>>>>> Guenter
>>>>>
>>>>
>>>>
>>>
>>
>>
> 

-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed