xen: add new Xen elfnote types and use them appropriately

Define recently added XEN_ELFNOTEs, and use them appropriately.
Most significantly, this enables domain checkpointing (xm save -c).

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index 2ab5f42f34d8..ef6c9e005f90 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -7,6 +7,7 @@
 #include <linux/init.h>
 #include <asm/boot.h>
 #include <xen/interface/elfnote.h>
+#include <asm/xen/interface.h>
 
         __INIT
 ENTRY(startup_xen)
@@ -32,5 +33,9 @@ ENTRY(hypercall_page)
         ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,       .asciz "!writable_page_tables|pae_pgdir_above_4gb")
         ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE,       .asciz "yes")
         ELFNOTE(Xen, XEN_ELFNOTE_LOADER,         .asciz "generic")
+        ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
+                .quad _PAGE_PRESENT; .quad _PAGE_PRESENT)
+        ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
+        ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW,   .long __HYPERVISOR_VIRT_START)
 
 #endif /*CONFIG_XEN */