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

Pull arm64 updates from Catalin Marinas:

 - Kexec support for arm64

 - Kprobes support

 - Expose MIDR_EL1 and REVIDR_EL1 CPU identification registers to sysfs

 - Trapping of user space cache maintenance operations and emulation in
   the kernel (CPU errata workaround)

 - Clean-up of the early page tables creation (kernel linear mapping,
   EFI run-time maps) to avoid splitting larger blocks (e.g.  pmds) into
   smaller ones (e.g.  ptes)

 - VDSO support for CLOCK_MONOTONIC_RAW in clock_gettime()

 - ARCH_HAS_KCOV enabled for arm64

 - Optimise IP checksum helpers

 - SWIOTLB optimisation to only allocate/initialise the buffer if the
   available RAM is beyond the 32-bit mask

 - Properly handle the "nosmp" command line argument

 - Fix for the initialisation of the CPU debug state during early boot

 - vdso-offsets.h build dependency workaround

 - Build fix when RANDOMIZE_BASE is enabled with MODULES off

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (64 commits)
  arm64: arm: Fix-up the removal of the arm64 regs_query_register_name() prototype
  arm64: Only select ARM64_MODULE_PLTS if MODULES=y
  arm64: mm: run pgtable_page_ctor() on non-swapper translation table pages
  arm64: mm: make create_mapping_late() non-allocating
  arm64: Honor nosmp kernel command line option
  arm64: Fix incorrect per-cpu usage for boot CPU
  arm64: kprobes: Add KASAN instrumentation around stack accesses
  arm64: kprobes: Cleanup jprobe_return
  arm64: kprobes: Fix overflow when saving stack
  arm64: kprobes: WARN if attempting to step with PSTATE.D=1
  arm64: debug: remove unused local_dbg_{enable, disable} macros
  arm64: debug: remove redundant spsr manipulation
  arm64: debug: unmask PSTATE.D earlier
  arm64: localise Image objcopy flags
  arm64: ptrace: remove extra define for CPSR's E bit
  kprobes: Add arm64 case in kprobe example module
  arm64: Add kernel return probes support (kretprobes)
  arm64: Add trampoline code for kretprobes
  arm64: kprobes instruction simulation support
  arm64: Treat all entry code as non-kprobe-able
  ...

1 files changed, 61 insertions, 3 deletions

diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h
index 7f94755089e2..ada08b5b036d 100644
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -46,7 +46,6 @@
 #define COMPAT_PSR_MODE_UND	0x0000001b
 #define COMPAT_PSR_MODE_SYS	0x0000001f
 #define COMPAT_PSR_T_BIT	0x00000020
-#define COMPAT_PSR_E_BIT	0x00000200
 #define COMPAT_PSR_F_BIT	0x00000040
 #define COMPAT_PSR_I_BIT	0x00000080
 #define COMPAT_PSR_A_BIT	0x00000100
@@ -74,6 +73,7 @@
 #define COMPAT_PT_DATA_ADDR		0x10004
 #define COMPAT_PT_TEXT_END_ADDR		0x10008
 #ifndef __ASSEMBLY__
+#include <linux/bug.h>
 
 /* sizeof(struct user) for AArch32 */
 #define COMPAT_USER_SZ	296
@@ -121,6 +121,8 @@ struct pt_regs {
 	u64 unused;	// maintain 16 byte alignment
 };
 
+#define MAX_REG_OFFSET offsetof(struct pt_regs, pstate)
+
 #define arch_has_single_step()	(1)
 
 #ifdef CONFIG_COMPAT
@@ -146,9 +148,58 @@ struct pt_regs {
 #define fast_interrupts_enabled(regs) \
 	(!((regs)->pstate & PSR_F_BIT))
 
-#define user_stack_pointer(regs) \
+#define GET_USP(regs) \
 	(!compat_user_mode(regs) ? (regs)->sp : (regs)->compat_sp)
 
+#define SET_USP(ptregs, value) \
+	(!compat_user_mode(regs) ? ((regs)->sp = value) : ((regs)->compat_sp = value))
+
+extern int regs_query_register_offset(const char *name);
+extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
+					       unsigned int n);
+
+/**
+ * regs_get_register() - get register value from its offset
+ * @regs:	pt_regs from which register value is gotten
+ * @offset:	offset of the register.
+ *
+ * regs_get_register returns the value of a register whose offset from @regs.
+ * The @offset is the offset of the register in struct pt_regs.
+ * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
+ */
+static inline u64 regs_get_register(struct pt_regs *regs, unsigned int offset)
+{
+	u64 val = 0;
+
+	WARN_ON(offset & 7);
+
+	offset >>= 3;
+	switch (offset) {
+	case 0 ... 30:
+		val = regs->regs[offset];
+		break;
+	case offsetof(struct pt_regs, sp) >> 3:
+		val = regs->sp;
+		break;
+	case offsetof(struct pt_regs, pc) >> 3:
+		val = regs->pc;
+		break;
+	case offsetof(struct pt_regs, pstate) >> 3:
+		val = regs->pstate;
+		break;
+	default:
+		val = 0;
+	}
+
+	return val;
+}
+
+/* Valid only for Kernel mode traps. */
+static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
+{
+	return regs->sp;
+}
+
 static inline unsigned long regs_return_value(struct pt_regs *regs)
 {
 	return regs->regs[0];
@@ -158,8 +209,15 @@ static inline unsigned long regs_return_value(struct pt_regs *regs)
 struct task_struct;
 int valid_user_regs(struct user_pt_regs *regs, struct task_struct *task);
 
-#define instruction_pointer(regs)	((unsigned long)(regs)->pc)
+#define GET_IP(regs)		((unsigned long)(regs)->pc)
+#define SET_IP(regs, value)	((regs)->pc = ((u64) (value)))
+
+#define GET_FP(ptregs)		((unsigned long)(ptregs)->regs[29])
+#define SET_FP(ptregs, value)	((ptregs)->regs[29] = ((u64) (value)))
+
+#include <asm-generic/ptrace.h>
 
+#undef profile_pc
 extern unsigned long profile_pc(struct pt_regs *regs);
 
 #endif /* __ASSEMBLY__ */