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

To: Andi Kleen <andi@xxxxxxxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH][RFC] Emulating real mode with x86_emulate
From: Anthony Liguori <aliguori@xxxxxxxxxx>
Date: Fri, 30 Mar 2007 16:20:38 -0500
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir@xxxxxxxxxxxxx>, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
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Andi Kleen wrote:
Anthony Liguori <aliguori@xxxxxxxxxx> writes:

Attached is a patch that begins to lay down the infrastructure for
emulating real mode with x86_emulate().  With a little more
refactoring, I think it could also replace the SVM emulator.

I thought the roadmap direction of this was to migrate the context
into qemu and let its JIT handle it? Or has that been dropped?

There are some hard problems with migrating into QEMU. Namely, the code that QEMU generates isn't SMP safe (atomic instructions lose their atomicity).


Anthony Liguori


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