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Re: [Xen-devel] Update Seabios on xen-unstable

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:


* 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

This patch also establishes the basic infrastructure to make
hypercalls, although it currently only uses it to query the hypervisor

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

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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