Re: [Xen-users] Xen PV display drivers

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

Hi, sorry for late reply

On 10/17/19 11:27 AM, Rajagopal Aravindan wrote:
> Hello Oleksandr,
>
> >>We do not use framebuffer drivers in our setups, but PV display 
> (Linux KMS).
> >>Please let me know if you need details on that.
> Yes, could you please share some details, to consolidate whatever 
> little study we have carried out so far ?
In order to run Xen PV display you need:
1. PV display front kernel driver [1]
2. PV display backend - user-space backend which runs either as
a Weston client or can run as DRM KMS client.
3. Configure your domain, for examples please see [3] and of course [4]

This should be all you need
> Look forward to your reply.
>
> Thanks,
> Rajagopal
Thank you,
Oleksandr
> On Fri, Sep 6, 2019 at 10:58 AM Oleksandr Andrushchenko 
> <Oleksandr_Andrushchenko@xxxxxxxx 
> <mailto:Oleksandr_Andrushchenko@xxxxxxxx>> wrote:
>     Hi,
>     On 9/5/19 9:47 PM, Julien Grall wrote:
>     > Hi,
>     >
>     > I am adding Oleksandr who has been looking after PV display driver
>     > recently.
>     >
>     We do not use framebuffer drivers in our setups, but PV display
>     (Linux KMS).
>     Please let me know if you need details on that.
>
>     > Cheers,
>     >
>     > On 8/28/19 6:49 PM, Rajagopal Aravindan wrote:
>     >> Hello Julien,
>     >>
>     >> I am trying to understand how a Dom-U's GUI desktop is viewable
>     >> through vncviewer.
>     >> While I see a fbfront driver in Ubuntu running as Dom-U, I
>     don't see
>     >> a fbback driver or equivalent.
>     >>
>     fbfront is a kernel driver and its counterpart (fbback) is a part of
>     QEMU [1]
>
>     >> Can you please provide me some info or links on this ?
>     OFFTOP: I am not subscribed on xen-users@, so I miss all the mails
>     there
>     >>
>     >> Thanks,
>     >> Rajagopal
>     >
>     [1]
>     
> https://xenbits.xen.org/gitweb/?p=qemu-xen.git;a=blob;f=hw/display/xenfb.c;h=3c79913b31a67d162299f598002133881e064c87;hb=HEAD
[1] https://elixir.bootlin.com/linux/v5.4-rc2/source/drivers/gpu/drm/xen
[2] https://github.com/xen-troops/displ_be
[3] 
https://github.com/xen-troops/meta-xt-prod-gen3-test/tree/master/recipes-dom0/dom0-image-thin-initramfs/files/meta-xt-prod-extra/recipes-extended/guest-addons/files
[4] https://xenbits.xen.org/docs/unstable/man/xl.cfg.5.html

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