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SubjectRe: Xenner design and kvm msr handling
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() ...


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