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xen: add capability to load initrd outside of initial mapping

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Modern pvops linux kernels support an initrd not covered by the initial
mapping. This capability is flagged by an elf-note.

In case the elf-note is set by the kernel don't place the initrd into
the initial mapping. This will allow to load larger initrds and/or
support domains with larger memory, as the initial mapping is limited
to 2GB and it is containing the p2m list.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Juergen Gross 2016-03-03 10:38:14 +01:00 • committed by Daniel Kiper
parent d73976fdff
commit 5500cefccd
3 changed files with 53 additions and 11 deletions
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include/grub/xen_file.h
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@ -36,6 +36,7 @@ struct grub_xen_file_info
int has_note;
int has_xen_guest;
int extended_cr3;
int unmapped_initrd;
enum
{
GRUB_XEN_FILE_I386 = 1,