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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-05-31 01:33:04 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-06-02 13:25:51 +0200 |
| commit | 7e0edc1bc343231029084761ebf59e522902eb49 (patch) | |
| tree | cf5fa89641b80b2775616e2224c39b7cae37d2f2 | |
| parent | d07af1f0e3a3e378074fc36322dd7b0e72d9a3e2 (diff) | |
| download | linux-7e0edc1bc343231029084761ebf59e522902eb49.tar.gz linux-7e0edc1bc343231029084761ebf59e522902eb49.tar.bz2 linux-7e0edc1bc343231029084761ebf59e522902eb49.zip | |
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>
| -rw-r--r-- | arch/x86/xen/xen-head.S | 5 | ||||
| -rw-r--r-- | include/xen/interface/elfnote.h | 20 |
2 files changed, 25 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 */ diff --git a/include/xen/interface/elfnote.h b/include/xen/interface/elfnote.h index a64d3df5bd95..7a8262c375cc 100644 --- a/include/xen/interface/elfnote.h +++ b/include/xen/interface/elfnote.h @@ -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__ */ /* |