Re: [XenPPC] xm save: adding couple domctl operations to access htab

[Tony Breeds <tony@xxxxxxxxxxxxxxxxxx>]

On Sat, Sep 30, 2006 at 05:29:40PM -0400, poff wrote:
> When saving a domain, its htab must be copied, real page numbers replaced 
> with physical,
> then written to disk. To copy the htab, I've tried for many hours to add a 
> domctl operation,
> #define XEN_DOMCTL_gethtab  29, using code and structures similar to 
> XEN_DOMCTL_getmemlist.
> 
> This new command makes it through do_xen_hypercall(), however, always get 
> ENOSYS returned...
> On the Xen side, hcall_xen() I print all the command numbers for do_domctl 
> ops, but this
> new command never arrives. Of course, have added a 'case XEN_DOMCTL_gethtab' 
> in domctl.c,
> and also printk before ENOSYS, but this code is never run.
> 
> 1) Is this a reasonable approach to copying the htab?
> 
> 2) Any clues?

I don't know if I'm off base but have you added appropriate code to 
linux? specifically arch/powerpc/platforms/xen/hcall.c ?

Yours Tony

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