[Xen-devel] Re: [PATCH][RFC] Emulating real mode with x86_emulat

To:	Anthony Liguori <aliguori@xxxxxxxxxx>
Subject:	[Xen-devel] Re: [PATCH][RFC] Emulating real mode with x86_emulate
From:	Andi Kleen <andi@xxxxxxxxxxxxxx>
Date:	Fri, 30 Mar 2007 23:25:48 +0200
Cc:	"Nakajima, Jun" <jun.nakajima@xxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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> There are some hard problems with migrating into QEMU.  Namely, the code 
> that QEMU generates isn't SMP safe (atomic instructions lose their 
> atomicity)

I see.

You're worrying that real mode startup trampolines of OS rely 
on atomic instructions?  I can't think of much other possible real mode
multi CPU code.

-Andi

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[Xen-devel] Re: [PATCH][RFC] Emulating real mode with x86_emulate