Re: [Xen-devel] xc_vcpu_setcontext problem with translated shadow pagetable domains

["Tim Wood" <twwood@xxxxxxxxx>]

On 11/20/06, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx> wrote:
> > I'm working on save/restore for (non hvm) domains with the
> > auto_translated_physmap feature enabled.  I've based my code roughly
> > off of a patch to provide save/restore support for HVM domains, but
> > I'm running into problems when I try to restore a domain.
> >
> > My call to xc_vcpu_setcontext() is failing during restoration -- is
> > there anything unusual about context structs for these types of
> > domains?
>
> Are you getting the restore domain into the right shadow pagetable mode?
I can see that when I restore the domain it is aware that the
"auto_translated_physmap" feature is being used, so I am assuming that
will result in the selection of the correct shadow page table mode.
I'll try to look and see whether that is actually happening.

> Otherwise things like the pagetable base will be invalid (you don't need
> to canonical-ize it on save as its already in gpfn form).
>
> Ian
Right -- I'm just copying the page table/memory contents directly
without canonicalizing (a nice benefit of using shadows!).

Thanks
- Tim

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