add arm64 support

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

arch/arm64/kernel/include/compiler.h

@@ -0,0 +1,32 @@
+/* compiler.h COPYRIGHT FUJITSU LIMITED 2015-2016 */
+#ifndef __ASM_COMPILER_H
+#define __ASM_COMPILER_H
+
+/* @ref.impl arch/arm64/include/asm/compiler.h::__asmeq(x,y) */
+/*
+ * This is used to ensure the compiler did actually allocate the register we
+ * asked it for some inline assembly sequences.  Apparently we can't trust the
+ * compiler from one version to another so a bit of paranoia won't hurt.  This
+ * string is meant to be concatenated with the inline asm string and will
+ * cause compilation to stop on mismatch.  (for details, see gcc PR 15089)
+ */
+#define __asmeq(x, y)  ".ifnc " x "," y " ; .err ; .endif\n\t"
+
+/* @ref.impl include/linux/compiler.h::__section(S) */
+/* Simple shorthand for a section definition */
+# define __section(S)	__attribute__ ((__section__(#S)))
+
+/* @ref.impl include/linux/compiler.h::__aligned(x) */
+/*
+ * From the GCC manual:
+ *
+ * Many functions have no effects except the return value and their
+ * return value depends only on the parameters and/or global
+ * variables.  Such a function can be subject to common subexpression
+ * elimination and loop optimization just as an arithmetic operator
+ * would be.
+ * [...]
+ */
+#define __aligned(x)	__attribute__((aligned(x)))
+
+#endif	/* __ASM_COMPILER_H */