[PATCH 11/11] [PVOPS] numa-guest-support elfnote

[PATCH 11/11] [PVOPS] numa-guest-support elfnote

[Dulloor]

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Add numa-guest-support elfnote, if compiled with CONFIG_XEN_NUMA_GUEST

-dulloor

Signed-off-by: Dulloor Rao <dulloor@gatech.edu>

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diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index 1a5ff24..61b0460 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -44,6 +44,9 @@ ENTRY(hypercall_page)
 	ELFNOTE(Xen, XEN_ELFNOTE_ENTRY,          _ASM_PTR startup_xen)
 	ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page)
 	ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,       .asciz "!writable_page_tables|pae_pgdir_above_4gb")
+#ifdef CONFIG_XEN_NUMA_GUEST
+	ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,       .asciz "numa_guest_support")
+#endif
 	ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE,       .asciz "yes")
 	ELFNOTE(Xen, XEN_ELFNOTE_LOADER,         .asciz "generic")
 	ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
diff --git a/include/xen/interface/features.h b/include/xen/interface/features.h
index f51b641..6578d76 100644
--- a/include/xen/interface/features.h
+++ b/include/xen/interface/features.h
@@ -41,6 +41,21 @@
 /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */
 #define XENFEAT_mmu_pt_update_preserve_ad  5
 
+/* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */
+#define XENFEAT_highmem_assist             6
+
+/*
+ * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel
+ * available pte bits.
+ */
+#define XENFEAT_gnttab_map_avail_bits      7
+
+/*
+ * If set, the guest is made aware of the underlying NUMA characteristics
+ * (numa guest enlightenment)
+ */
+#define XENFEAT_numa_guest_support         8
+
 #define XENFEAT_NR_SUBMAPS 1
 
 #endif /* __XEN_PUBLIC_FEATURES_H__ */

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