> I wanted to boot s10 HVM in 64-bit mode but it always boots in 32-bit
> mode. Is there a special grub entry to boot s10 HVM domU in 64-bit mode?
Yes, under xvm 3.0.4 the cpuid flags aren't reported 100% the same
as on metal, and the small difference is enough that the boot code
decides that the HVM domU environment isn't capable of 64-bit mode
(which is wrong), and falls back to 32-bit mode.
See bug 6471548, which is similar:
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6471548
As a workaround try to add the 64-bit kernel path into the grub
boot entry, I think the following should work
kernel /platform/i86pc/multiboot kernel/amd64/unix
See also:
http://www.opensolaris.org/jive/thread.jspa?messageID=182632#182177
http://www.opensolaris.org/jive/thread.jspa?messageID=141307#141602
And IIRC, the hang when doing BIOS calls from 64-bit HVM has been fixed
in a recent opensolaris release:
http://www.opensolaris.org/jive/thread.jspa?messageID=141307#142380
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