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

[Ingo Molnar <mingo@kernel.org>]

Linus,

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

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

   # HEAD: 2c4645439e8f2f6e7c37f158feae6f6a82baa910 x86/irq: Fix outdated comments

Here are the main changes in this tree:

 - Introduce x86-64 IRQ/exception/debug stack guard pages to detect stack 
   overflows immediately and deterministically.

 - Clean up over a decade worth of cruft accumulated.

The outcome of this feature should be more clear-cut faults/crashes when 
any of the low level x86 CPU stacks overflow, instead of silent memory 
corruption and sporadic failures much later on.


  out-of-topic modifications in x86-irq-for-linus:
  --------------------------------------------------
  mm/slab.c                          # 80552f0f7aeb: mm/slab: Remove store_stacki

 Thanks,

	Ingo

------------------>
Andy Lutomirski (4):
      x86/dumpstack: Fix off-by-one errors in stack identification
      x86/irq/64: Remove a hardcoded irq_stack_union access
      x86/irq/64: Split the IRQ stack into its own pages
      x86/irq/64: Remap the IRQ stack with guard pages

Jiang Biao (1):
      x86/irq: Fix outdated comments

Qian Cai (1):
      mm/slab: Remove store_stackinfo()

Thomas Gleixner (27):
      x86/irq/64: Limit IST stack overflow check to #DB stack
      x86/irq/64: Sanitize the top/bottom confusion
      x86/idt: Remove unused macro SISTG
      x86/64: Remove stale CURRENT_MASK
      x86/exceptions: Remove unused stack defines on 32bit
      x86/exceptions: Make IST index zero based
      x86/cpu_entry_area: Cleanup setup functions
      x86/exceptions: Add structs for exception stacks
      x86/cpu_entry_area: Prepare for IST guard pages
      x86/cpu_entry_area: Provide exception stack accessor
      x86/traps: Use cpu_entry_area instead of orig_ist
      x86/irq/64: Use cpu entry area instead of orig_ist
      x86/dumpstack/64: Use cpu_entry_area instead of orig_ist
      x86/cpu: Prepare TSS.IST setup for guard pages
      x86/cpu: Remove orig_ist array
      x86/exceptions: Disconnect IST index and stack order
      x86/exceptions: Enable IST guard pages
      x86/exceptions: Split debug IST stack
      x86/dumpstack/64: Speedup in_exception_stack()
      x86/irq/32: Define IRQ_STACK_SIZE
      x86/irq/32: Make irq stack a character array
      x86/irq/32: Rename hard/softirq_stack to hard/softirq_stack_ptr
      x86/irq/64: Rename irq_stack_ptr to hardirq_stack_ptr
      x86/irq/32: Invoke irq_ctx_init() from init_IRQ()
      x86/irq/32: Handle irq stack allocation failure proper
      x86/irq/64: Init hardirq_stack_ptr during CPU hotplug
      x86/irq/64: Remove stack overflow debug code


 Documentation/x86/kernel-stacks       | 13 +++--
 arch/x86/Kconfig                      |  2 +-
 arch/x86/entry/entry_64.S             | 16 +++---
 arch/x86/include/asm/cpu_entry_area.h | 69 ++++++++++++++++++++++--
 arch/x86/include/asm/debugreg.h       |  2 -
 arch/x86/include/asm/irq.h            |  6 +--
 arch/x86/include/asm/irq_vectors.h    |  4 +-
 arch/x86/include/asm/page_32_types.h  |  8 ++-
 arch/x86/include/asm/page_64_types.h  | 16 +++---
 arch/x86/include/asm/processor.h      | 43 ++++++---------
 arch/x86/include/asm/smp.h            |  2 +-
 arch/x86/include/asm/stackprotector.h |  6 +--
 arch/x86/include/asm/stacktrace.h     |  2 +
 arch/x86/kernel/asm-offsets_64.c      |  4 +-
 arch/x86/kernel/cpu/common.c          | 60 ++++-----------------
 arch/x86/kernel/dumpstack_32.c        |  8 +--
 arch/x86/kernel/dumpstack_64.c        | 99 ++++++++++++++++++++++++-----------
 arch/x86/kernel/head_64.S             |  2 +-
 arch/x86/kernel/idt.c                 | 19 ++++---
 arch/x86/kernel/irq_32.c              | 41 ++++++++-------
 arch/x86/kernel/irq_64.c              | 89 +++++++++++++++----------------
 arch/x86/kernel/irqinit.c             |  4 +-
 arch/x86/kernel/nmi.c                 | 20 ++++++-
 arch/x86/kernel/setup_percpu.c        |  5 --
 arch/x86/kernel/smpboot.c             | 15 ++++--
 arch/x86/kernel/vmlinux.lds.S         |  7 +--
 arch/x86/mm/cpu_entry_area.c          | 64 +++++++++++++++-------
 arch/x86/mm/fault.c                   |  3 +-
 arch/x86/tools/relocs.c               |  2 +-
 arch/x86/xen/smp_pv.c                 |  4 +-
 arch/x86/xen/xen-head.S               | 10 ++--
 drivers/xen/events/events_base.c      |  1 -
 mm/slab.c                             | 48 +++--------------
 33 files changed, 377 insertions(+), 317 deletions(-)