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

Pull arm64 updates from Will Deacon:
 "Here's the usual mixed bag of arm64 updates, also including some
  related EFI changes (Acked by Matt) and the MMU gather range cleanup
  (Acked by you).

  Changes include:
   - support for alternative instruction patching from Andre
   - seccomp from Akashi
   - some AArch32 instruction emulation, required by the Android folks
   - optimisations for exception entry/exit code, cmpxchg, pcpu atomics
   - mmu_gather range calculations moved into core code
   - EFI updates from Ard, including long-awaited SMBIOS support
   - /proc/cpuinfo fixes to align with the format used by arch/arm/
   - a few non-critical fixes across the architecture"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (70 commits)
  arm64: remove the unnecessary arm64_swiotlb_init()
  arm64: add module support for alternatives fixups
  arm64: perf: Prevent wraparound during overflow
  arm64/include/asm: Fixed a warning about 'struct pt_regs'
  arm64: Provide a namespace to NCAPS
  arm64: bpf: lift restriction on last instruction
  arm64: Implement support for read-mostly sections
  arm64: compat: align cacheflush syscall with arch/arm
  arm64: add seccomp support
  arm64: add SIGSYS siginfo for compat task
  arm64: add seccomp syscall for compat task
  asm-generic: add generic seccomp.h for secure computing mode 1
  arm64: ptrace: allow tracer to skip a system call
  arm64: ptrace: add NT_ARM_SYSTEM_CALL regset
  arm64: Move some head.text functions to executable section
  arm64: jump labels: NOP out NOP -> NOP replacement
  arm64: add support to dump the kernel page tables
  arm64: Add FIX_HOLE to permanent fixed addresses
  arm64: alternatives: fix pr_fmt string for consistency
  arm64: vmlinux.lds.S: don't discard .exit.* sections at link-time
  ...

4 files changed, 83 insertions, 11 deletions

diff --git a/include/asm-generic/seccomp.h b/include/asm-generic/seccomp.h
new file mode 100644
index 000000000000..9fa1f653ed3b
--- /dev/null
+++ b/include/asm-generic/seccomp.h
@@ -0,0 +1,30 @@
+/*
+ * include/asm-generic/seccomp.h
+ *
+ * Copyright (C) 2014 Linaro Limited
+ * Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_GENERIC_SECCOMP_H
+#define _ASM_GENERIC_SECCOMP_H
+
+#include <linux/unistd.h>
+
+#if defined(CONFIG_COMPAT) && !defined(__NR_seccomp_read_32)
+#define __NR_seccomp_read_32            __NR_read
+#define __NR_seccomp_write_32           __NR_write
+#define __NR_seccomp_exit_32            __NR_exit
+#define __NR_seccomp_sigreturn_32       __NR_rt_sigreturn
+#endif /* CONFIG_COMPAT && ! already defined */
+
+#define __NR_seccomp_read               __NR_read
+#define __NR_seccomp_write              __NR_write
+#define __NR_seccomp_exit               __NR_exit
+#ifndef __NR_seccomp_sigreturn
+#define __NR_seccomp_sigreturn          __NR_rt_sigreturn
+#endif
+
+#endif /* _ASM_GENERIC_SECCOMP_H */
diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h
index 5672d7ea1fa0..08848050922e 100644
--- a/include/asm-generic/tlb.h
+++ b/include/asm-generic/tlb.h
@@ -96,10 +96,9 @@ struct mmu_gather {
 #endif
         unsigned long           start;
         unsigned long           end;
-        unsigned int            need_flush : 1, /* Did free PTEs */
         /* we are in the middle of an operation to clear
          * a full mm and can make some optimizations */
-                                fullmm : 1,
+        unsigned int            fullmm : 1,
         /* we have performed an operation which
          * requires a complete flush of the tlb */
                                 need_flush_all : 1;
@@ -128,16 +127,54 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
                 tlb_flush_mmu(tlb);
 }
 
+static inline void __tlb_adjust_range(struct mmu_gather *tlb,
+                                      unsigned long address)
+{
+        tlb->start = min(tlb->start, address);
+        tlb->end = max(tlb->end, address + PAGE_SIZE);
+}
+
+static inline void __tlb_reset_range(struct mmu_gather *tlb)
+{
+        tlb->start = TASK_SIZE;
+        tlb->end = 0;
+}
+
+/*
+ * In the case of tlb vma handling, we can optimise these away in the
+ * case where we're doing a full MM flush.  When we're doing a munmap,
+ * the vmas are adjusted to only cover the region to be torn down.
+ */
+#ifndef tlb_start_vma
+#define tlb_start_vma(tlb, vma) do { } while (0)
+#endif
+
+#define __tlb_end_vma(tlb, vma)                                 \
+        do {                                                    \
+                if (!tlb->fullmm && tlb->end) {                 \
+                        tlb_flush(tlb);                         \
+                        __tlb_reset_range(tlb);                 \
+                }                                               \
+        } while (0)
+
+#ifndef tlb_end_vma
+#define tlb_end_vma     __tlb_end_vma
+#endif
+
+#ifndef __tlb_remove_tlb_entry
+#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
+#endif
+
 /**
  * tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation.
  *
- * Record the fact that pte's were really umapped in ->need_flush, so we can
- * later optimise away the tlb invalidate.   This helps when userspace is
- * unmapping already-unmapped pages, which happens quite a lot.
+ * Record the fact that pte's were really unmapped by updating the range,
+ * so we can later optimise away the tlb invalidate.   This helps when
+ * userspace is unmapping already-unmapped pages, which happens quite a lot.
  */
 #define tlb_remove_tlb_entry(tlb, ptep, address)                \
         do {                                                    \
-                tlb->need_flush = 1;                            \
+                __tlb_adjust_range(tlb, address);               \
                 __tlb_remove_tlb_entry(tlb, ptep, address);     \
         } while (0)
 
@@ -151,27 +188,27 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
 
 #define tlb_remove_pmd_tlb_entry(tlb, pmdp, address)            \
         do {                                                    \
-                tlb->need_flush = 1;                            \
+                __tlb_adjust_range(tlb, address);               \
                 __tlb_remove_pmd_tlb_entry(tlb, pmdp, address); \
         } while (0)
 
 #define pte_free_tlb(tlb, ptep, address)                        \
         do {                                                    \
-                tlb->need_flush = 1;                            \
+                __tlb_adjust_range(tlb, address);               \
                 __pte_free_tlb(tlb, ptep, address);             \
         } while (0)
 
 #ifndef __ARCH_HAS_4LEVEL_HACK
 #define pud_free_tlb(tlb, pudp, address)                        \
         do {                                                    \
-                tlb->need_flush = 1;                            \
+                __tlb_adjust_range(tlb, address);               \
                 __pud_free_tlb(tlb, pudp, address);             \
         } while (0)
 #endif
 
 #define pmd_free_tlb(tlb, pmdp, address)                        \
         do {                                                    \
-                tlb->need_flush = 1;                            \
+                __tlb_adjust_range(tlb, address);               \
                 __pmd_free_tlb(tlb, pmdp, address);             \
         } while (0)
 
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 0949f9c7e872..0238d612750e 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -547,6 +547,9 @@ void efi_native_runtime_setup(void);
 #define SMBIOS_TABLE_GUID    \
     EFI_GUID(  0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 
+#define SMBIOS3_TABLE_GUID    \
+    EFI_GUID(  0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94 )
+
 #define SAL_SYSTEM_TABLE_GUID    \
     EFI_GUID(  0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 
@@ -810,7 +813,8 @@ extern struct efi {
         unsigned long mps;              /* MPS table */
         unsigned long acpi;             /* ACPI table  (IA64 ext 0.71) */
         unsigned long acpi20;           /* ACPI table  (ACPI 2.0) */
-        unsigned long smbios;           /* SM BIOS table */
+        unsigned long smbios;           /* SMBIOS table (32 bit entry point) */
+        unsigned long smbios3;          /* SMBIOS table (64 bit entry point) */
         unsigned long sal_systab;       /* SAL system table */
         unsigned long boot_info;        /* boot info table */
         unsigned long hcdp;             /* HCDP table */
diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index ea9bf2561b9e..71e1d0ed92f7 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -397,6 +397,7 @@ typedef struct elf64_shdr {
 #define NT_ARM_TLS      0x401           /* ARM TLS register */
 #define NT_ARM_HW_BREAK 0x402           /* ARM hardware breakpoint registers */
 #define NT_ARM_HW_WATCH 0x403           /* ARM hardware watchpoint registers */
+#define NT_ARM_SYSTEM_CALL      0x404   /* ARM system call number */
 #define NT_METAG_CBUF   0x500           /* Metag catch buffer registers */
 #define NT_METAG_RPIPE  0x501           /* Metag read pipeline state */
 #define NT_METAG_TLS    0x502           /* Metag TLS pointer */