Re: Xen 4.6 Development Update (three months reminder)

From: Fabio Fantoni <fabio.fantoni@m2r.biz>
To: Andrew Cooper <andrew.cooper3@citrix.com>,
	Jim Fehlig <jfehlig@suse.com>,
	wei.liu2@citrix.com
Cc: elena.ufimtseva@oracle.com, feng.wu@intel.com,
	ian.jackson@eu.citrix.com, oleksandr.dmytryshyn@globallogic.com,
	chegger@amazon.de, cyliu@suse.com, edgar.iglesias@gmail.com,
	chao.p.peng@linux.intel.com, parth.dixit@linaro.org,
	dgolomb@seas.upenn.edu, eshelton@pobox.com,
	kai.huang@linux.intel.com, jtweaver@hawaii.edu,
	vijay.kilari@gmail.com, rcojocaru@bitdefender.com,
	ross.lagerwall@citrix.com, tamas.lengyel@zentific.com,
	Vijaya.Kumar@caviumnetworks.com, anthony.perard@citrix.com,
	xen-devel@lists.xenproject.org, manishjaggi.oss@gmail.com,
	olaf@aepfle.de, ian.campbell@citrix.com, wency@cn.fujitsu.com,
	julien.grall@linaro.org, frediano.ziglio@huawei.com,
	quan.xu@intel.com, tiejun.chen@intel.com,
	boris.ostrovsky@oracle.com, vkuznets@redhat.com,
	andrii.tseglytskyi@globallogic.com, jgross@suse.com,
	talex5@gmail.com, malcolm.crossley@citrix.com,
	ard.biesheuvel@linaro.org, geo
Subject: Re: Xen 4.6 Development Update (three months reminder)
Date: Wed, 29 Apr 2015 12:23:36 +0200	[thread overview]
Message-ID: <5540B128.20608@m2r.biz> (raw)
In-Reply-To: <55402413.8070409@citrix.com>

Il 29/04/2015 02:21, Andrew Cooper ha scritto:
> On 28/04/15 23:17, Jim Fehlig wrote:
>> Jim Fehlig wrote:
>>> wei.liu2@citrix.com wrote:
>>>> Hi all
>>>>
>>>> We are now three months into 4.6 development window. This is an 
>>>> email to keep
>>>> track of all the patch series I gathered. It is by no means 
>>>> complete and / or
>>>> acurate. Feel free to reply this email with new projects or correct my
>>>> misunderstanding.
>>> [...]
>>>> *  libxl: add qxl vga interface support for upstream qemu (fair)
>>>>    -  Fabio Fantoni
>>> I've been working on SPICE support in the libvirt libxl driver and
>>> quickly came across the lack of support for qxl device.  What is the
>>> status of this work?  AFAICT, there was a v16 posted nearly a year ago
>>> with no comments
>>>
>>> http://lists.xen.org/archives/html/xen-devel/2014-05/msg03214.html
>> After playing with this more, I think the patch will need a
>> LIBXL_HAVE_QXL or similar in libxl.h.
>>
>>> I noticed this work was committed in the 4.3 dev cycle, but was 
>>> reverted
>>> before the release by commit 5479961a, which describes problems with
>>> "instructions that cannot be used for MMIO".  Has any progress been 
>>> made
>>> on that front?  Is Fabio's patch the only piece missing to support qxl
>>> devices?
>> I've tried Fabio's patch on top of fairly recent xen-unstable and don't
>> see the issues mentioned in the commit message of 5479961a. Note that I
>> only tried linux HVM guests though.

qxl vga is working good on windows domUs except problem after save/restore
on linux domUs instead I wasn't able to get it working
today I tried with fedora 22 (beta3) lxde live dvd (have included latest 
qxl drivers available): with both stdvga and qxl mouse is working but 
not visible and I not understand why, I'll try also lubuntu 15.04.
can you tell me what dom0 and domU have you use for test please?

>
> 16byte decomposed instruction still don't get passed correctly to the 
> device model.
>
> This has been discussed at the hackathon and plan is in place.
>
> ~Andrew

Thanks, is there any eta of possible solution?

Thanks for any reply and sorry for my bad english.