Re: Update Seabios on xen-unstable

[Fabio Fantoni <fantonifabio@tiscali.it>]

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Il 02/01/2013 15:41, Fabio Fantoni ha scritto:
> Qemu still crashes if qxl is active and used but I don't think it is a 
> seabios problem.
>
> I've been looking for the problem in xen but I didn't find a solution 
> at the moment. I can tell that seabios is called by hvmloader that 
> sets a few things like acpi and e820 mapping before calling it. Could 
> it be that hvmloader does something that interferes with seabios, like 
> imposing restrictions?
>
> In practice if I activate qxl but I use it only as stdvga I don't 
> experience any problem except low video performance, but if I use it 
> fully qemu crashes when spice start using qxl features, logging this 
> error:
> (/usr/sbin/xl:4658): Spice-CRITICAL **: red_memslots.c:123:get_virt: 
> slot_id 194 too big, addr=c2c2c2c2c2c2c2c2
>
> The only other possibility that comes to mind is that not enough 
> videoram is successifully set. I thought this problem was already 
> solved some months ago with xen and qemu upstream patches. Could there 
> be other problems preventing the assignment and use 128 mb of videoram?
>
> Thanks for any reply.
>
I see this commit on seabios:

> Commit:74c78786719b202557d4f177bd290ddd98e979fe
>
> * Add support for use as Xen HVM BIOS.
>
> SeaBIOS is called by Xen's hvmloader which does the basic platform
> setup (PCI, APIC, etc) and provides the various BIOS tables. Therefore
> avoid re-doing that setup and copy out the tables as necessary. A
> simple data structure is defined to pass the addresses of these
> tables.
>
> This patch also establishes the basic infrastructure to make
> hypercalls, although it currently only uses it to query the hypervisor
> version.
>
> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>

Can be enabled the reconstruction of the bios tables with seabios 
instead of mantain hvmloader tables or is necessary hvmloader tables for 
correct domU working?
I want try if seabios tables solves the problem.
If yes what I must change on seabios code for test it?
Thanks for any reply


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