Messages in this thread | | | Date | Tue, 21 Apr 2009 18:00:45 +0200 | From | Gerd Hoffmann <> | Subject | Re: Xenner design and kvm msr handling |
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On 04/21/09 15:33, Avi Kivity wrote: > Gerd Hoffmann wrote: >> Not sure, have to dig into the xen code to figure. >> >> Could be xen doesn't remember the page in the first place. They might >> let the illegal instruction fault handler patch the opcode. At least I >> vaguely remember some discussions about that.
Xen does a simple msr-triggered memcpy() as well, without keeping track of the page. On a quick glimpse I can't find a opcode patching place either. Hmm.
>> Could be there isn't a interface to forgot the page. "reboot" in xen >> land is "destroy guest, restart it". > > How do you unload a driver then?
The linux module (xen-platform-pci) has no module_exit() ...
cheers, Gerd
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