add arm64 support

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

arch/arm64/kernel/include/debug-monitors.h

@@ -0,0 +1,35 @@
+/* debug-monitors.h COPYRIGHT FUJITSU LIMITED 2016-2017 */
+#ifndef __HEADER_ARM64_COMMON_DEBUG_MONITORS_H
+#define __HEADER_ARM64_COMMON_DEBUG_MONITORS_H
+
+/* Low-level stepping controls. */
+#define DBG_MDSCR_SS		(1 << 0)
+#define DBG_SPSR_SS		(1 << 21)
+
+/* MDSCR_EL1 enabling bits */
+#define DBG_MDSCR_KDE		(1 << 13)
+#define DBG_MDSCR_MDE		(1 << 15)
+#define DBG_MDSCR_MASK		~(DBG_MDSCR_KDE | DBG_MDSCR_MDE)
+
+#define DBG_ESR_EVT(x)		(((x) >> 27) & 0x7)
+
+/* AArch64 */
+#define DBG_ESR_EVT_HWBP	0x0
+#define DBG_ESR_EVT_HWSS	0x1
+#define DBG_ESR_EVT_HWWP	0x2
+#define DBG_ESR_EVT_BRK		0x6
+
+#ifndef __ASSEMBLY__
+
+unsigned char debug_monitors_arch(void);
+void mdscr_write(unsigned int mdscr);
+unsigned int mdscr_read(void);
+void debug_monitors_init(void);
+
+struct pt_regs;
+void set_regs_spsr_ss(struct pt_regs *regs);
+void clear_regs_spsr_ss(struct pt_regs *regs);
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* !__HEADER_ARM64_COMMON_DEBUG_MONITORS_H */