add arm64 support

- add arm64 dependent codes with GICv3 and SVE support
- fix bugs based on architecture separation requests

arch/arm64/kernel/include/elfnote.h

@@ -0,0 +1,60 @@
+/* elfnote.h COPYRIGHT FUJITSU LIMITED 2016 */
+/* @ref.impl include/linux/elfnote.h */
+/*
+ * Helper macros to generate ELF Note structures, which are put into a
+ * PT_NOTE segment of the final vmlinux image.  These are useful for
+ * including name-value pairs of metadata into the kernel binary (or
+ * modules?) for use by external programs.
+ *
+ * Each note has three parts: a name, a type and a desc.  The name is
+ * intended to distinguish the note's originator, so it would be a
+ * company, project, subsystem, etc; it must be in a suitable form for
+ * use in a section name.  The type is an integer which is used to tag
+ * the data, and is considered to be within the "name" namespace (so
+ * "FooCo"'s type 42 is distinct from "BarProj"'s type 42).  The
+ * "desc" field is the actual data.  There are no constraints on the
+ * desc field's contents, though typically they're fairly small.
+ *
+ * All notes from a given NAME are put into a section named
+ * .note.NAME.  When the kernel image is finally linked, all the notes
+ * are packed into a single .notes section, which is mapped into the
+ * PT_NOTE segment.  Because notes for a given name are grouped into
+ * the same section, they'll all be adjacent the output file.
+ *
+ * This file defines macros for both C and assembler use.  Their
+ * syntax is slightly different, but they're semantically similar.
+ *
+ * See the ELF specification for more detail about ELF notes.
+ */
+#ifndef __HEADER_ARM64_COMMON_ELFNOTE_H
+#define __HEADER_ARM64_COMMON_ELFNOTE_H
+
+#ifdef __ASSEMBLER__
+
+/*
+ * Generate a structure with the same shape as Elf{32,64}_Nhdr (which
+ * turn out to be the same size and shape), followed by the name and
+ * desc data with appropriate padding.  The 'desctype' argument is the
+ * assembler pseudo op defining the type of the data e.g. .asciz while
+ * 'descdata' is the data itself e.g.  "hello, world".
+ *
+ * e.g. ELFNOTE(XYZCo, 42, .asciz, "forty-two")
+ *      ELFNOTE(XYZCo, 12, .long, 0xdeadbeef)
+ */
+#define ELFNOTE_START(name, type, flags)        \
+.pushsection .note.name, flags,@note    ;       \
+  .balign 4                             ;       \
+  .long 2f - 1f         /* namesz */    ;       \
+  .long 4484f - 3f      /* descsz */    ;       \
+  .long type                            ;       \
+1:.asciz #name                          ;       \
+2:.balign 4                             ;       \
+3:
+
+#define ELFNOTE_END                             \
+4484:.balign 4                          ;       \
+.popsection                             ;
+
+#endif	/* __ASSEMBLER__ */
+
+#endif	/* !__HEADER_ARM64_COMMON_ELFNOTE_H */