Re: Unable to create guest PV domain on OMAP5432

[Jayadev Kumaran <jayadevk123@gmail.com>]

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Hello Andrii,

>> What defconfig are you based on? Do you have a device-tree support
enabled?

I use *omap2plus_defconfig* . Yes , device tree support is there and the
dts file used is

*omap5-uevm.dts>> *But it did not get a command line to setup console on
hvc0, or the kernel crashed in earliest stages.

Is there a way to debug which one of the above two possibilities has lead
to the issue ? As I'm using the dom0 kernel image for my guest, is it still
possible that it could be a kernel crash since it has already booted up for
dom0.

Thanks and Regards,

On Wed, Nov 15, 2017 at 4:31 PM, Andrii Anisov <andrii_anisov@epam.com>
wrote:

> Hello Jayadev,
>
>
> On 15.11.17 12:46, Jayadev Kumaran wrote:
>
>> Hello Andrii,
>>
>> >> What kernel do you use for DomU? Please make sure you have in that
>> kernel configuration XEN support enabled (together with hypervisor console
>> support).
>>
>> I use a 3.15 kernel (git://git.kernel.org/pub/scm/
>> linux/kernel/git/torvalds/linux.git <http://git.kernel.org/pub/scm
>> /linux/kernel/git/torvalds/linux.git>) with the following configs
>> enabled for Xen support.
>> CONFIG_XEN_DOM0=y
>> CONFIG_XEN=y
>> CONFIG_XEN_BLKDEV_FRONTEND=y
>> CONFIG_XEN_BLKDEV_BACKEND=y
>> CONFIG_XEN_NETDEV_FRONTEND=y
>> CONFIG_XEN_NETDEV_BACKEND=y
>> CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y
>> CONFIG_HVC_XEN=y
>> CONFIG_HVC_XEN_FRONTEND=y
>> CONFIG_XEN_DEV_EVTCHN=y
>> CONFIG_XEN_BACKEND=y
>> CONFIG_XENFS=y
>> CONFIG_XEN_COMPAT_XENFS=y
>> CONFIG_XEN_SYS_HYPERVISOR=y
>> CONFIG_XEN_XENBUS_FRONTEND=y
>> CONFIG_XEN_GNTDEV=y
>> CONFIG_XEN_GRANT_DEV_ALLOC=y
>> CONFIG_XEN_PRIVCMD=y
>>
>> In fact, it is the same kernel as that of dom0, just to check if Xen is
>> properly configured.
>>
> What defconfig are you based on? Do you have a device-tree support enabled?
>
> Also, I had previously tried with a kernel image with no Xen support and
>> the results were quite similar - guest domain gets created and is shown in
>> a running state as per /'xl list' /, however /'xl console/' shows nothing
>> but hangs until I press Ctrl+5 .
>>
> Your guest is created and XEN treats it as being running, you can see this
> in `xl list`.
> But it did not get a command line to setup console on hvc0, or the kernel
> crashed in earliest stages.
>
>
> --
>
> *Andrii Anisov*
>
>
>

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