linux-kernel - [GIT PULL] x86/iopl changes for v5.5

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Date:   Mon, 25 Nov 2019 17:16:26 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>
Subject: [GIT PULL] x86/iopl changes for v5.5

Linus,

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

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

   # HEAD: e3cb0c7102f04c83bf1a7cb1d052e92749310b46 x86/ioperm: Fix use of deprecated config option

This tree implements a nice simplification of the iopl and ioperm code 
that Thomas Gleixner discovered: we can implement the IO privilege 
features of the iopl system call by using the IO permission bitmap in 
permissive mode, while trapping CLI/STI/POPF/PUSHF uses in user-space if 
they change the interrupt flag.

This tree implements that feature, with testing facilities and related 
cleanups.

 Thanks,

	Ingo

------------------>
Alexander Duyck (1):
      x86/ioperm: Fix use of deprecated config option

Thomas Gleixner (21):
      x86/ptrace: Prevent truncation of bitmap size
      x86/process: Unify copy_thread_tls()
      x86/cpu: Unify cpu_init()
      x86/tss: Fix and move VMX BUILD_BUG_ON()
      x86/iopl: Cleanup include maze
      x86/ioperm: Simplify first ioperm() invocation logic
      x86/ioperm: Avoid bitmap allocation if no permissions are set
      x86/io: Speedup schedule out of I/O bitmap user
      x86/tss: Move I/O bitmap data into a seperate struct
      x86/ioperm: Move iobitmap data into a struct
      x86/ioperm: Add bitmap sequence number
      x86/ioperm: Move TSS bitmap update to exit to user work
      x86/ioperm: Remove bitmap if all permissions dropped
      x86/ioperm: Share I/O bitmap if identical
      selftests/x86/ioperm: Extend testing so the shared bitmap is exercised
      x86/iopl: Fixup misleading comment
      x86/iopl: Restrict iopl() permission scope
      x86/iopl: Remove legacy IOPL option
      x86/ioperm: Extend IOPL config to control ioperm() as well
      selftests/x86/iopl: Extend test to cover IOPL emulation
      x86/entry/32: Clarify register saving in __switch_to_asm()


 arch/x86/Kconfig                        |  18 +++
 arch/x86/entry/common.c                 |   4 +
 arch/x86/entry/entry_32.S               |   8 +-
 arch/x86/include/asm/io_bitmap.h        |  29 +++++
 arch/x86/include/asm/paravirt.h         |   4 -
 arch/x86/include/asm/paravirt_types.h   |   2 -
 arch/x86/include/asm/pgtable_32_types.h |   2 +-
 arch/x86/include/asm/processor.h        | 113 ++++++++++-------
 arch/x86/include/asm/ptrace.h           |   6 +
 arch/x86/include/asm/switch_to.h        |  10 ++
 arch/x86/include/asm/thread_info.h      |  14 ++-
 arch/x86/include/asm/xen/hypervisor.h   |   2 -
 arch/x86/kernel/cpu/common.c            | 188 ++++++++++++----------------
 arch/x86/kernel/doublefault.c           |   2 +-
 arch/x86/kernel/ioport.c                | 209 +++++++++++++++++++++-----------
 arch/x86/kernel/paravirt.c              |   2 -
 arch/x86/kernel/process.c               | 205 ++++++++++++++++++++++++-------
 arch/x86/kernel/process_32.c            |  77 ------------
 arch/x86/kernel/process_64.c            |  86 -------------
 arch/x86/kernel/ptrace.c                |  12 +-
 arch/x86/kvm/vmx/vmx.c                  |   8 --
 arch/x86/mm/cpu_entry_area.c            |   8 ++
 arch/x86/xen/enlighten_pv.c             |  10 --
 tools/testing/selftests/x86/ioperm.c    |  16 ++-
 tools/testing/selftests/x86/iopl.c      | 129 ++++++++++++++++++--
 25 files changed, 686 insertions(+), 478 deletions(-)
 create mode 100644 arch/x86/include/asm/io_bitmap.h