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Date: Thu, 07 Apr 2011 16:34:38 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] How does the QEMU load the binary files bios.bin
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To: Gleb Natapov <gleb@redhat.com>
Cc: Jordan Justen <jljusten@gmail.com>, Bei Guan <gbtju85@gmail.com>, kvm-devel <kvm@vger.kernel.org>, QEMU Developers <qemu-devel@nongnu.org>

On 04/07/2011 02:31 PM, Gleb Natapov wrote:
>
> Remapping part is easy. As you are saying QEMU already does remapping,

Yes.

> the only thing missing is creating/destroying/remapping KVM memory slot
> (with SMP it is slightly more complicated, but doable).

Yup.  It's not impossible but not free.

>   But after doing
> this SMM will not Just Work in KVM on Intel because VMX does not support
> SMM mode and it can't be approximated by vm86, so KVM will have to emulate
> every single instruction while in SMM mode and this like will not work.

Isn't everyone using Westmere's at this point with unrestricted guest 
mode :-)

BTW, I assume that there's some kernel logic needed to enable SMM 
intercepts but I'm not entirely sure what's involved there.

Regards,

Anthony Liguori

> --
> 			Gleb.
>