Re: [Xen-devel] bimodal PAE and compatibility

[Gerd Hoffmann <kraxel@xxxxxxx>]

John Levon wrote:
> We currently ship a PAE 32-bit domU that we can trivially make bimodal,
> except that if we set it to "bimodal", then older Xens will default to
> thinking the domU is not PAE:
> 
> 353     dsi->pae_kernel = PAEKERN_no;
> 354     if ( dsi->__elfnote_section )
> 355     {
> 356         p = xen_elfnote_string(dsi, XEN_ELFNOTE_PAE_MODE);
> 357         if ( p != NULL && strncmp(p, "yes", 3) == 0 )
> 358             dsi->pae_kernel = PAEKERN_extended_cr3;
> 
> Could we have a new note instead?

I don't think it improves the situation, for older Xens you need two
kernels anyway, even if the only difference is the content of the
pae_mode elf note ...

cheers,
  Gerd

-- 
Gerd Hoffmann <kraxel@xxxxxxx>

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