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From: "H. Peter Anvin" <hpa@zytor.com>
To: Avi Kivity <avi@qumranet.com>
Cc: Matt_Domsch@Dell.com, pjones@redhat.com, kvm@vger.kernel.org,
	Anthony Liguori <aliguori@us.ibm.com>
Subject: Re: qemu oddness with isolinux vesamenu.c32
Date: Sat, 19 Jul 2008 11:29:56 -0700	[thread overview]
Message-ID: <488232A4.1010706@zytor.com> (raw)
In-Reply-To: <488199AB.4020109@qumranet.com>

Avi Kivity wrote:
> 
> kvm allows writing into the bios; qemu does not.  I thought it was a kvm 
> bug, but turns out that it's a qemu bug...
> 
> (though to be fair, true emulation ought to start out read-only, then be 
> enabled by the bios ram shadow mechanism)
> 

Yes, although simulating the memory "pre-shadowed" works just as well; 
then it should be marked readonly by the BIOS immediately prior to 
running INT 19h.

	-hpa

  reply	other threads:[~2008-07-19 18:43 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <E9909A75A543064DB66E55B8E3BE41EC72701C@ausx3mps307.aus.amer.dell.com>
     [not found] ` <48800A9D.1080403@zytor.com>
2008-07-18 16:25   ` qemu oddness with isolinux vesamenu.c32 H. Peter Anvin
2008-07-18 16:53     ` H. Peter Anvin
2008-07-19  7:37     ` Avi Kivity
2008-07-19 18:29       ` H. Peter Anvin [this message]
2008-07-20  1:45         ` H. Peter Anvin
2008-07-21  9:43           ` Avi Kivity
2008-07-21 12:51             ` H. Peter Anvin

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