linux-kernel - [GIT PULL] x86 fixes

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Date:   Sun, 1 Dec 2019 23:22:08 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>
Subject: [GIT PULL] x86 fixes

Linus,

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

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

   # HEAD: 91298f1a302dad0f0f630413c812818636faa8a0 x86/mm/pat: Fix off-by-one bugs in interval tree search

Various fixes:

 - Fix the PAT performance regression that downgraded write-combining 
   device memory regions to uncached.

 - There's been a number of bugs in 32-bit double fault handling - 
   hopefully all fixed now.

 - Fix an LDT crash

 - Fix an FPU over-optimization that broke with GCC9 code optimizations.

 - Misc cleanups

 Thanks,

	Ingo

------------------>
Andy Lutomirski (9):
      selftests/x86/single_step_syscall: Check SYSENTER directly
      lkdtm: Add a DOUBLE_FAULT crash type on x86
      x86/traps: Disentangle the 32-bit and 64-bit doublefault code
      x86/doublefault/32: Rename doublefault.c to doublefault_32.c
      x86/doublefault/32: Move #DF stack and TSS to cpu_entry_area
      x86/doublefault/32: Rewrite the x86_32 #DF handler and unify with 64-bit
      x86/traps: die() instead of panicking on a double fault
      x86/ptrace: Remove set_segment_reg() implementations for current
      x86/ptrace: Document FSBASE and GSBASE ABI oddities

Borislav Petkov (2):
      x86/entry/32: Remove unused 'restore_all_notrace' local label
      x86/ioperm: Save an indentation level in tss_update_io_bitmap()

Ingo Molnar (1):
      x86/mm/pat: Fix off-by-one bugs in interval tree search

Joerg Roedel (1):
      x86/mm/32: Sync only to VMALLOC_END in vmalloc_sync_all()

Sebastian Andrzej Siewior (1):
      x86/fpu: Don't cache access to fpu_fpregs_owner_ctx


 arch/x86/Kconfig.debug                            |   2 +-
 arch/x86/entry/entry_32.S                         |  43 ++++++-
 arch/x86/include/asm/cpu_entry_area.h             |  12 ++
 arch/x86/include/asm/doublefault.h                |  13 +++
 arch/x86/include/asm/fpu/internal.h               |   2 +-
 arch/x86/include/asm/pgtable_32_types.h           |   7 +-
 arch/x86/include/asm/processor.h                  |   2 -
 arch/x86/include/asm/traps.h                      |   3 +
 arch/x86/kernel/Makefile                          |   4 +-
 arch/x86/kernel/cpu/common.c                      |  12 +-
 arch/x86/kernel/doublefault.c                     |  86 --------------
 arch/x86/kernel/doublefault_32.c                  | 136 ++++++++++++++++++++++
 arch/x86/kernel/dumpstack_32.c                    |  30 +++++
 arch/x86/kernel/process.c                         |  52 ++++-----
 arch/x86/kernel/ptrace.c                          |  36 ++++--
 arch/x86/kernel/traps.c                           |  31 +++--
 arch/x86/mm/cpu_entry_area.c                      |  14 ++-
 arch/x86/mm/fault.c                               |   2 +-
 arch/x86/mm/pat_interval.c                        |  12 +-
 drivers/misc/lkdtm/bugs.c                         |  39 +++++++
 drivers/misc/lkdtm/core.c                         |   3 +
 drivers/misc/lkdtm/lkdtm.h                        |   3 +
 tools/testing/selftests/x86/single_step_syscall.c |  94 +++++++++++++--
 23 files changed, 467 insertions(+), 171 deletions(-)
 create mode 100644 arch/x86/include/asm/doublefault.h
 delete mode 100644 arch/x86/kernel/doublefault.c
 create mode 100644 arch/x86/kernel/doublefault_32.c