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RE: [Xen-ia64-devel] Community effort neededtocatch upwithxen-unstable

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>, "Byrne, John (HP Labs)" <john.l.byrne@xxxxxx>
Subject: RE: [Xen-ia64-devel] Community effort neededtocatch upwithxen-unstable
From: "Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>
Date: Tue, 6 Sep 2005 14:46:33 -0700
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Thread-topic: [Xen-ia64-devel] Community effort neededtocatch upwithxen-unstable
Hi Kevin --

I hadn't yet applied this patch as I recall there was some discussion
about doing it differently.  Should I go ahead and apply it and
we will fix it later?


> Currently I just put the last page allocated to xenU as the 
> store page,
> not in the middle. But yes, there's still one problem in dom_fw_init,
> where all allocated pages are exposed to domain. Instead we should
> reserve the last page and let store page out of domain's scope. Check
> whether following changes solves your issue:
> diff -r 8799d14bef77 xen/arch/ia64/dom_fw.c
> --- a/xen/arch/ia64/dom_fw.c    Thu Aug 25 22:53:20 2005
> +++ b/xen/arch/ia64/dom_fw.c    Fri Sep  2 10:38:11 2005
> @@ -512,6 +512,11 @@
>                 return 0;
>         }
>  */
> +
> +       /* Last page is for xenstore, and not exported to domain */
> +       if (d != dom0)
> +               maxmem = (d->max_pages - 1) * PAGE_SIZE;
> +
>         memset(fw_mem, 0, fw_mem_size);
>  #ifdef XEN

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