Re: [Xen-devel] Unable to get QXL vga working / videomem over 4MB issue

[Fantu <fantonifabio@xxxxxxxxxx>]

Ian Campbell-10 wrote
> 
> On Tue, 2012-05-08 at 17:24 +0100, Pasi KÃrkkÃinen wrote:
>> On Fri, May 04, 2012 at 12:32:19PM +0100, Ian Campbell wrote:
>> > On Fri, 2012-05-04 at 12:21 +0100, Anthony PERARD wrote:
>> > > On Fri, May 4, 2012 at 9:28 AM, Ian Campbell <Ian.Campbell@>
>> wrote:
>> > > > Anthony -- any idea why the videoram setting doesn't work with
>> upstream
>> > > > qemu?
>> > > 
>> > > Well, the parameter could be pass to qemu qxl, but it's not yet. But
>> > > then, it seams you have to have this value of at least 32MB,
>> otherwise
>> > > the value is increase in qemu.
>> > > 
>> > > For cirrus/stdvga, there is no way to pass the parameter to qemu, the
>> > > size in qemu is fixed to 8MB.
>> > 
>> > OK, so this is simply a feature which upstream qemu doesn't have.
>> That's
>> > fine.
>> > 
>> 
>> Is this something that should be forward-ported from qemu-xen-traditional
>> to upstream qemu ?
> 
> If there are reasons why this should be configurable, then I guess so.
> Are you going to look into that?
> 
> This doesn't seem like 4.2 material to me though.
> 
>> > I guess xl.cfg(5) needs updating to make it clear that this option only
>> > applies to qemu-xen-traditional.
>> > 
>> > The docs also currently say that for stdvga the default is 8MB and for
>> > not stdvga (by which I guess it means Cirrus) the default if 4MB. So I
>> > guess even this is inaccurate for qemu-xen-upstream?
>> > 
>> > Can someone send a patch please?
>> > 
>> 
>> For the documentation patch maybe add this to the 4.2 status todo list
>> as a reminder :) 
> 
> Please make requests for additions to the TODO list in the most recent
> TODO list thread, with a link to the relevant thread. Otherwise the
> chances are I won't remember when I update the list, since I only look
> at replies in the TODO threads.
> 
> Ian.
> 
> 
> _______________________________________________
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> Xen-devel@.xen
> http://lists.xen.org/xen-devel
> 
I may have found something that makes the problem clearer.
With Precise hvm domU with spice and cirrus (default vga) on qemu-xen lspci
show 32 mb but Xorg only sees 4 mb.

----------------------------------------------------
lspci -vvv
...
00:02.0 VGA compatible controller: Cirrus Logic GD 5446 (prog-if 00 [VGA
controller])
        Subsystem: Red Hat, Inc Device 1100
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Region 0: Memory at f0000000 (32-bit, prefetchable) [size=&lt;b>32M*]
        Region 1: Memory at f3020000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at f3000000 [disabled] [size=64K]
        Kernel modules: cirrusfb
...
-----------------
Xorg.0.log
---------------
...
[     6.443] (--) CIRRUS(0): VideoRAM: 4096 kByte
...
----------------------------------------------------

If you need more information I'll post it.

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