Re: Unable to get QXL vga working

[Fabio Fantoni <fantonifabio@tiscali.it>]

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Il 24/05/2012 13:28, ZhouPeng ha scritto:
> On Thu, May 24, 2012 at 6:13 PM, Stefano Stabellini
> <stefano.stabellini@eu.citrix.com>  wrote:
>> On Thu, 24 May 2012, ZhouPeng wrote:
>>> Sorry for late reply, I am not on this mail these days because of my work.
>>>
>>> I further test qxl-vga and I think I figure out the problem in some extend.
>>>
>>> If using qxl device, the default memory size of vga is 64M.
>>> Which will cause xen_ram_alloc(qemu/xen-all.c) fails.
>>>
>>> The exact reason is xc_domain_populate_physmap_exact fails, because
>>> xen-hypervisor
>>> fail,
>>> it's because of   alloc_domheap_pages(d, a->extent_order, a->memflags)
>>> fails in hypervisor.
>>>
>>> I am not very familiar with xen's memory management, Does 64M exceed
>>> xen's heap space in this context?
>> XL sets an upper bound of memory that can be allocated to the VM in
>> libxl__build_pre, calling xc_domain_setmaxmem.
>> My guess is that a 64MB allocation would go over that limit.
>> You could try increasing the limit manually changing the
>> xc_domain_setmaxmem call in libxl__build_pre, or you could try setting
>> videoram=64 in the VM config file.
> Your guess is absolutely right!
>
> But set videoram=128 or
> xc_domain_setmaxmem(ctx->xch, domid, info->target_memkb +
> LIBXL_MAXMEM_CONSTANT + 2 * 64 * 1024);
>
> Then I successfuly install qxl driver in win-hvm and QXL can work properly.
>
> I will send some patch to add qxl support to libxl.
I tried your 3 patches taken from the mailing list, it works but doesn't 
solve qxl problems for me, on linux domU (Precise and Wheezy) xorg 
doesn't start and on windows 7 I have heavy performance problem (unusable).
I tried also with qemu 1.1.0 but nothing change.
Does it work correctly for you? If so can I have some detail of your 
configurations please?
For audio support this is needed too: (tested and working)
-device intel-hda,id=sound0 -device hda-duplex,id=sound0-codec0 on qemu 
invocation and env QEMU_AUDIO_DRV=spice
Can you add audio support on libxl please?




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