xen 2.0.7 on VIA C3 (EPIA)

[Chris Brookes <cbrookes@gmail.com>]

Hello,

Has anyone tried to get Xen 2.0.7 booting on a VIA EPIA board with a
VIA C3 CPU? I know some of the EPIA mainboards have a CPU with
"features" (4kb pages and no cmov instruction) that require the patch
Adam Sulmicki put together for 2.0.0 and 2.0.1
(http://lists.xensource.com/archives/html/xen-devel/2004-12/txt8D0L7RWimG.txt),
and I have managed to patch, compile and boot a NetBSD dom0
sucessfully with this version.

However, I would really like to try and get 2.0.7 going, so I've
attempted to apply the original patch where it still seemed
appropriate. The patch does manage to get me some output from Xen as
it boots (which is a great step forward from the immediate reboot
without it), however the whole thing halts with "(XEN) Unknown
interrupt" just after "
XEN) System RAM: 509MB (521852kB)".

With a few well placed printk's I was able to determine that the halt
was happening inside init_frametable() in arch/x86/memory.c, at the
point where it calls memset(frame_table, 0, frame_table_size).

Unfortunately my C & ASM skills being what they are (i.e not great)
I'm making  slow progress. Anyone more accomplished been there and
done this, or can lend a hand?

Regards

Chris

cpu0: VIA C3 Samuel 2/Ezra (686-class), 533.36 MHz, id 0x673
cpu0: features 80803035<FPU,DE,TSC,MSR,MTRR>
cpu0: features 80803035<PGE,MMX>
cpu0: features 80803035<3DNOW>
cpu0: I-cache 64 KB 32B/line 4-way, D-cache 64 KB 32B/line 4-way
cpu0: L2 cache 64 KB 32B/line 4-way
cpu0: ITLB 128 4 KB entries 8-way
cpu0: DTLB 128 4 KB entries 8-way
cpu0: 4 page colors