Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull ARM64 updates from Catalin Marinas:
 - KGDB support for arm64
 - PCI I/O space extended to 16M (in preparation of PCIe support
   patches)
 - Dropping ZONE_DMA32 in favour of ZONE_DMA (we only need one for the
   time being), together with swiotlb late initialisation to correctly
   setup the bounce buffer
 - DMA API cache maintenance support (not all ARMv8 platforms have
   hardware cache coherency)
 - Crypto extensions advertising via ELF_HWCAP2 for compat user space
 - Perf support for dwarf unwinding in compat mode
 - asm/tlb.h converted to the generic mmu_gather code
 - asm-generic rwsem implementation
 - Code clean-up

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (42 commits)
  arm64: Remove pgprot_dmacoherent()
  arm64: Support DMA_ATTR_WRITE_COMBINE
  arm64: Implement custom mmap functions for dma mapping
  arm64: Fix __range_ok macro
  arm64: Fix duplicated Kconfig entries
  arm64: mm: Route pmd thp functions through pte equivalents
  arm64: rwsem: use asm-generic rwsem implementation
  asm-generic: rwsem: de-PPCify rwsem.h
  arm64: enable generic CPU feature modalias matching for this architecture
  arm64: smp: make local symbol static
  arm64: debug: make local symbols static
  ARM64: perf: support dwarf unwinding in compat mode
  ARM64: perf: add support for frame pointer unwinding in compat mode
  ARM64: perf: add support for perf registers API
  arm64: Add boot time configuration of Intermediate Physical Address size
  arm64: Do not synchronise I and D caches for special ptes
  arm64: Make DMA coherent and strongly ordered mappings not executable
  arm64: barriers: add dmb barrier
  arm64: topology: Implement basic CPU topology support
  arm64: advertise ARMv8 extensions to 32-bit compat ELF binaries
  ...

1 files changed, 47 insertions, 17 deletions

diff --git a/arch/arm64/include/asm/debug-monitors.h b/arch/arm64/include/asm/debug-monitors.h
index 62314791570c..6e9b5b36921c 100644
--- a/arch/arm64/include/asm/debug-monitors.h
+++ b/arch/arm64/include/asm/debug-monitors.h
@@ -26,6 +26,53 @@
 #define DBG_ESR_EVT_HWWP	0x2
 #define DBG_ESR_EVT_BRK		0x6
 
+/*
+ * Break point instruction encoding
+ */
+#define BREAK_INSTR_SIZE		4
+
+/*
+ * ESR values expected for dynamic and compile time BRK instruction
+ */
+#define DBG_ESR_VAL_BRK(x)	(0xf2000000 | ((x) & 0xfffff))
+
+/*
+ * #imm16 values used for BRK instruction generation
+ * Allowed values for kgbd are 0x400 - 0x7ff
+ * 0x400: for dynamic BRK instruction
+ * 0x401: for compile time BRK instruction
+ */
+#define KGDB_DYN_DGB_BRK_IMM		0x400
+#define KDBG_COMPILED_DBG_BRK_IMM	0x401
+
+/*
+ * BRK instruction encoding
+ * The #imm16 value should be placed at bits[20:5] within BRK ins
+ */
+#define AARCH64_BREAK_MON	0xd4200000
+
+/*
+ * Extract byte from BRK instruction
+ */
+#define KGDB_DYN_DGB_BRK_INS_BYTE(x) \
+	((((AARCH64_BREAK_MON) & 0xffe0001f) >> (x * 8)) & 0xff)
+
+/*
+ * Extract byte from BRK #imm16
+ */
+#define KGBD_DYN_DGB_BRK_IMM_BYTE(x) \
+	(((((KGDB_DYN_DGB_BRK_IMM) & 0xffff) << 5) >> (x * 8)) & 0xff)
+
+#define KGDB_DYN_DGB_BRK_BYTE(x) \
+	(KGDB_DYN_DGB_BRK_INS_BYTE(x) | KGBD_DYN_DGB_BRK_IMM_BYTE(x))
+
+#define  KGDB_DYN_BRK_INS_BYTE0  KGDB_DYN_DGB_BRK_BYTE(0)
+#define  KGDB_DYN_BRK_INS_BYTE1  KGDB_DYN_DGB_BRK_BYTE(1)
+#define  KGDB_DYN_BRK_INS_BYTE2  KGDB_DYN_DGB_BRK_BYTE(2)
+#define  KGDB_DYN_BRK_INS_BYTE3  KGDB_DYN_DGB_BRK_BYTE(3)
+
+#define CACHE_FLUSH_IS_SAFE		1
+
 enum debug_el {
 	DBG_ACTIVE_EL0 = 0,
 	DBG_ACTIVE_EL1,
@@ -43,23 +90,6 @@ enum debug_el {
 #ifndef __ASSEMBLY__
 struct task_struct;
 
-#define local_dbg_save(flags)							\
-	do {									\
-		typecheck(unsigned long, flags);				\
-		asm volatile(							\
-		"mrs	%0, daif			// local_dbg_save\n"	\
-		"msr	daifset, #8"						\
-		: "=r" (flags) : : "memory");					\
-	} while (0)
-
-#define local_dbg_restore(flags)						\
-	do {									\
-		typecheck(unsigned long, flags);				\
-		asm volatile(							\
-		"msr	daif, %0			// local_dbg_restore\n"	\
-		: : "r" (flags) : "memory");					\
-	} while (0)
-
 #define DBG_ARCH_ID_RESERVED	0	/* In case of ptrace ABI updates. */
 
 #define DBG_HOOK_HANDLED	0