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Re: [Qemu-devel] Re: [PATCH 5/5] Port apic to new VMState design

From: Gerd Hoffmann
Subject: Re: [Qemu-devel] Re: [PATCH 5/5] Port apic to new VMState design
Date: Wed, 19 Aug 2009 10:00:01 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2

Basically what I am asking is if you couldn't just add an optional
callback so some additional stuff can be done after the "basic" state
has been loaded - or if that isn't desired at least a callback that
allows verifying the loaded values and aborting execution.

I think we are going to need post-processing callbacks anyway. Several drivers have to do some actions after loading the state information. There you'll be able to set the stats size and also perform sanity checks on the loaded state.

That is completely different from what I meant.
Changing the RAM compromises the VM and only the VM, an exploit in a
device emulation might allow to compromise the _host_. Is it now clearer
what I meant?

When you are able modify the savevm state you already have access to the host ...


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