Re: [Xen-devel] ARM64:Porting xen to new hardware

[Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>]

Hi, Bharat

On Mon, Sep 25, 2017 at 8:40 PM, bharat gohil <ghl.bhrt@xxxxxxxxx> wrote:
>
>
> On 25-Sep-2017 6:59 PM, "Julien Grall" <julien.grall@xxxxxxx> wrote:
>
> Hi,
>
> I am using same setup.
> It just my guess because no response to key ctrl+a input.
>
> SoC has 8250 compitible UART.I will print character in receive handler of
> UART in Xen. Do we have any other hook test this?

Maybe you got stuck in the UART interrupt handler. Can you recheck?

If so, can you take a look at the patch which has been posted recently:
https://patchwork.kernel.org/patch/9959003/

>
> One more thing, is big-little supported in xen?
> How Xen distribute load among the CPUs or Xen only run in context of the
> guest only?
> In my setup Dom0 use energy aware scheduler.
>
> Thanks,
> Bharat
>
>
> On 09/25/2017 01:53 PM, bharat gohil wrote:
>>
>> Hello Andrii,
>>
>> I tried but no success.
>> It looks, Xen is not running.
>
>
> I am a bit confused... on one of the previous e-mail you posted log from
> Xen:
>
> (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to
> Xen)
>
> (XEN) Freed 272kB init memory.
>
> So unless you have a completely new setup, Xen is definitely running.
> However, what may happen is the serial driver in Xen does not receive input
> characters.
>
> One of the first test would be to check whether the driver effectively
> receive characters.
>
> Cheers,
>
>>
>> Thanks,
>> Bharat
>>
>>
>> On Mon, Sep 25, 2017 at 5:45 PM, Andrii Anisov <andrii_anisov@xxxxxxxx
>> <mailto:andrii_anisov@xxxxxxxx>> wrote:
>>
>>     Hello Bharat,
>>
>>
>>     On 25.09.17 11:42, bharat gohil wrote:
>>
>>         Hello Wilk,
>>
>>         I had try Ctrl+a three times and 'd' but no dump on the serial
>>         console.
>>
>>     Its a way to switch to XEN debug console. In case you are using
>>     minicom, you should press Ctrl+A six times, then you will see the
>>     line like following:
>>          (XEN) *** Serial input -> Xen (type 'CTRL-a' three times to
>>     switch input to DOM0)
>>
>>     Then you can press 'h' for seeing installed key handlers.
>>
>>     But all of this requires XEN to be running somehow.
>>
>>     --
>>     *Andrii Anisov*
>>
>>
>>
>>
>>
>> --
>> Regards,
>> Bharat Gohil
>> Sr.Software Engineer
>> bharat.gohil@xxxxxxxxxx <mailto:bharat.gohil@xxxxxxxxxx>
>> +919427054633
>
>
> --
> Julien Grall
>
>



-- 
Regards,

Oleksandr Tyshchenko

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