[GIT PULL] x86/mm changes for v5.2

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest x86-mm-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-mm-for-linus

   # HEAD: caa841360134f863987f2d4f77b8dc2fbb7596f8 x86/mm: Initialize PGD cache during mm initialization

The changes in this tree are:

 - text_poke() fixes and an extensive set of executability lockdowns, to 
   (hopefully) eliminate the last residual circumstances under which we 
   are using W|X mappings even temporarily on x86 kernels. This required 
   a broad range of surgery in text patching facilities, module loading, 
   trampoline handling and other bits.

 - Tweak page fault messages to be more informative and more structured.

 - Remove DISCONTIGMEM support on x86-32 and make SPARSEMEM the default.

 - Reduce KASLR granularity on 5-level paging kernels from 512 GB to 1 GB.

 - Misc other changes and updates.

  out-of-topic modifications in x86-mm-for-linus:
  -------------------------------------------------
  arch/Kconfig                       # d253ca0c3865: x86/mm/cpa: Add set_direct_m
  include/asm-generic/pgtable.h      # caa841360134: x86/mm: Initialize PGD cache
  include/asm-generic/tlb.h          # 5932c9fd19e6: mm/tlb: Provide default nmi_
  include/linux/filter.h             # d53d2f78cead: bpf: Use vmalloc special fla
                                   # f2c65fb3221a: x86/modules: Avoid breaking 
  include/linux/mm.h                 # d63326928611: mm/hibernation: Make hiberna
  include/linux/sched/task.h         # 13585fa0668c: fork: Provide a function for
  include/linux/set_memory.h         # d253ca0c3865: x86/mm/cpa: Add set_direct_m
  include/linux/uprobes.h            # aad42dd44db0: uprobes: Initialize uprobes 
  include/linux/vmalloc.h            # 868b104d7379: mm/vmalloc: Add flag for fre
  kernel/bpf/core.c                  # d53d2f78cead: bpf: Use vmalloc special fla
  kernel/events/uprobes.c            # aad42dd44db0: uprobes: Initialize uprobes 
  kernel/module.c                    # 1a7b7d922081: modules: Use vmalloc special
                                   # f2c65fb3221a: x86/modules: Avoid breaking 
  kernel/power/snapshot.c            # d63326928611: mm/hibernation: Make hiberna
  kernel/trace/bpf_trace.c           # c7b6f29b6257: bpf: Fail bpf_probe_write_us
  mm/page_alloc.c                    # d63326928611: mm/hibernation: Make hiberna
  mm/vmalloc.c                       # 868b104d7379: mm/vmalloc: Add flag for fre

 Thanks,

	Ingo

------------------>
Andy Lutomirski (1):
      x86/mm: Introduce temporary mm structs

Baoquan He (2):
      x86/mm/KASLR: Use only one PUD entry for real mode trampoline
      x86/mm/KASLR: Reduce randomization granularity for 5-level paging to 1GB

Borislav Petkov (1):
      x86/fault: Make fault messages more succinct

Jiri Kosina (1):
      x86/mm: Remove in_nmi() warning from 64-bit implementation of vmalloc_fault()

Kees Cook (1):
      x86/build: Move _etext to actual end of .text

Mike Rapoport (2):
      x86/Kconfig: Make SPARSEMEM default for 32-bit x86
      x86/Kconfig: Deprecate DISCONTIGMEM support for 32-bit x86

Nadav Amit (18):
      x86/mm/tlb: Remove 'struct flush_tlb_info' from the stack
      x86/alternatives: Add text_poke_kgdb() to not assert the lock when debugging
      mm/tlb: Provide default nmi_uaccess_okay()
      bpf: Fail bpf_probe_write_user() while mm is switched
      x86/jump_label: Use text_poke_early() during early init
      x86/mm: Save debug registers when loading a temporary mm
      uprobes: Initialize uprobes earlier
      fork: Provide a function for copying init_mm
      x86/alternatives: Initialize temporary mm for patching
      x86/alternatives: Use temporary mm for text poking
      x86/kgdb: Avoid redundant comparison of patched code
      x86/ftrace: Set trampoline pages as executable
      x86/kprobes: Set instruction page as executable
      x86/modules: Avoid breaking W^X while loading modules
      x86/jump-label: Remove support for custom text poker
      x86/alternatives: Remove the return value of text_poke_*()
      x86/alternatives: Add comment about module removal races
      x86/mm: Initialize PGD cache during mm initialization

Rick Edgecombe (7):
      x86/mm/cpa: Add set_direct_map_*() functions
      mm/hibernation: Make hibernation handle unmapped pages
      mm/vmalloc: Add flag for freeing of special permsissions
      modules: Use vmalloc special flag
      bpf: Use vmalloc special flag
      x86/ftrace: Use vmalloc special flag
      x86/kprobes: Use vmalloc special flag

Sean Christopherson (2):
      x86/fault: Reword initial BUG message for unhandled page faults
      x86/fault: Decode and print #PF oops in human readable form

Stephen Kitt (1):
      x86/mm: Fix the 56-bit addresses memory map in Documentation/x86/x86_64/mm.txt


 Documentation/x86/x86_64/mm.txt      |   6 +-
 arch/Kconfig                         |   4 +
 arch/x86/Kconfig                     |  11 +-
 arch/x86/include/asm/fixmap.h        |   2 -
 arch/x86/include/asm/mmu_context.h   |  56 ++++++++++
 arch/x86/include/asm/pgtable.h       |   3 +
 arch/x86/include/asm/set_memory.h    |   3 +
 arch/x86/include/asm/text-patching.h |   7 +-
 arch/x86/include/asm/tlbflush.h      |   2 +
 arch/x86/kernel/alternative.c        | 201 +++++++++++++++++++++++++++--------
 arch/x86/kernel/ftrace.c             |  22 ++--
 arch/x86/kernel/jump_label.c         |  21 ++--
 arch/x86/kernel/kgdb.c               |  25 ++---
 arch/x86/kernel/kprobes/core.c       |  19 +++-
 arch/x86/kernel/module.c             |   2 +-
 arch/x86/kernel/vmlinux.lds.S        |   6 +-
 arch/x86/mm/fault.c                  |  55 ++++------
 arch/x86/mm/init.c                   |  37 +++++++
 arch/x86/mm/kaslr.c                  |  94 +++++++---------
 arch/x86/mm/pageattr.c               |  16 +--
 arch/x86/mm/pgtable.c                |  10 +-
 arch/x86/mm/tlb.c                    | 116 ++++++++++++++------
 arch/x86/xen/mmu_pv.c                |   2 -
 include/asm-generic/pgtable.h        |   2 +
 include/asm-generic/tlb.h            |   9 ++
 include/linux/filter.h               |  18 +---
 include/linux/mm.h                   |  18 ++--
 include/linux/sched/task.h           |   1 +
 include/linux/set_memory.h           |  11 ++
 include/linux/uprobes.h              |   5 +
 include/linux/vmalloc.h              |  15 +++
 init/main.c                          |   6 ++
 kernel/bpf/core.c                    |   1 -
 kernel/events/uprobes.c              |   8 +-
 kernel/fork.c                        |  25 +++--
 kernel/module.c                      |  82 +++++++-------
 kernel/power/snapshot.c              |   5 +-
 kernel/trace/bpf_trace.c             |   8 ++
 mm/page_alloc.c                      |   7 +-
 mm/vmalloc.c                         | 113 ++++++++++++++++----
 40 files changed, 711 insertions(+), 343 deletions(-)