Messages in this thread | | | Date | Tue, 21 Apr 2009 19:15:45 +0300 | From | Avi Kivity <> | Subject | Re: Xenner design and kvm msr handling |
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Gerd Hoffmann wrote: > 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. >
Maybe migration is cooperative, that is the host tells the guest it is migrated, so it can re-register the hypercall area?
-- error compiling committee.c: too many arguments to function
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