Re: [Xen-devel] Does Xen in 64 bit mode support shadow page table mode?

[Randy Thelen <rthelen@xxxxxxxxxx>]

Randy Thelen wrote:

> Folks --
>
> I'm trying to experiment with running a 64 bit paravirtualized  
> guest in shadow page table mode, and I'm getting an error while  
> pinning the page table.
> The call to pin the pages is in xc_linux_build.c:
>
> static int setup_guest(int xc_handle, ...
>
> #if defined(__x86_64__)
>     /*
>      * Pin down l4tab addr as page dir page - causes hypervisor to   
> provide
>      * correct protection for the page
>      */
>     if ( pin_table(xc_handle, MMUEXT_PIN_L4_TABLE,
>                    xen_cr3_to_pfn(ctxt->ctrlreg[3]), dom) )
>         goto error_out;
> #endif
Incidentally, if I comment out this line from my start.S file:

//      .ascii ",FEATURES=!writable_page_tables|! 
auto_translated_physmap"
Then the pin_table() call, above, works just fine and the guest  
domain is created.
Does that help narrow down the problem?

-- Randy

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