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Commit 7e0edc1b authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge Committed by Ingo Molnar
Browse files

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: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d07af1f0

arch/x86/xen/xen-head.S

+5 −0
Original line number Diff line number Diff line
@@ -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 */

include/xen/interface/elfnote.h

+20 −0
Original line number Diff line number Diff line
@@ -120,6 +120,26 @@ 
 */

#define XEN_ELFNOTE_BSD_SYMTAB    11



/*

 * The lowest address the hypervisor hole can begin at (numeric).

 *

 * This must not be set higher than HYPERVISOR_VIRT_START. Its presence

 * also indicates to the hypervisor that the kernel can deal with the

 * hole starting at a higher address.

 */

#define XEN_ELFNOTE_HV_START_LOW  12



/*

 * List of maddr_t-sized mask/value pairs describing how to recognize

 * (non-present) L1 page table entries carrying valid MFNs (numeric).

 */

#define XEN_ELFNOTE_L1_MFN_VALID  13



/*

 * Whether or not the guest supports cooperative suspend cancellation.

 */

#define XEN_ELFNOTE_SUSPEND_CANCEL 14



#endif /* __XEN_PUBLIC_ELFNOTE_H__ */



/*