[MODERATED] [PATCH 0/9] TAA v2 0

From: Borislav Petkov <[email protected]>
Subject: [PATCH 0/9] TAA v2

Hi,

lemme send the pile out one more time before I leave for OSS EU in Lyon.
Patch 6 is still there until Paolo and Tony have figured out what should
happen with guests.

changelog:
==========

v1:

here's the pile I've picked up. I've incorporated as much of the
feedback as possible, scream loudly if something's missing. First
testing looks good.

We'll cast them in stone in the coming days because distros and stable
have to start backporting soon. All fixes will go ontop, as in previous
occasions.

Michal Hocko (1):
  x86/tsx: Add config options to set tsx=on|off|auto

Pawan Gupta (8):
  x86/msr: Add the IA32_TSX_CTRL MSR
  x86/cpu: Add a helper function x86_read_arch_cap_msr()
  x86/cpu: Add a "tsx=" cmdline option with TSX disabled by default
  x86/speculation/taa: Add mitigation for TSX Async Abort
  x86/speculation/taa: Add sysfs reporting for TSX Async Abort
  kvm/x86: Export MDS_NO=0 to guests when TSX is enabled
  x86/tsx: Add "auto" option to the tsx= cmdline parameter
  x86/speculation/taa: Add documentation for TSX Async Abort

 .../ABI/testing/sysfs-devices-system-cpu      |   1 +
 Documentation/admin-guide/hw-vuln/index.rst   |   1 +
 .../admin-guide/hw-vuln/tsx_async_abort.rst   | 276 ++++++++++++++++++
 .../admin-guide/kernel-parameters.txt         |  67 +++++
 Documentation/x86/index.rst                   |   1 +
 Documentation/x86/tsx_async_abort.rst         | 117 ++++++++
 arch/x86/Kconfig                              |  45 +++
 arch/x86/include/asm/cpufeatures.h            |   1 +
 arch/x86/include/asm/msr-index.h              |   9 +
 arch/x86/include/asm/nospec-branch.h          |   4 +-
 arch/x86/include/asm/processor.h              |   7 +
 arch/x86/kernel/cpu/Makefile                  |   2 +-
 arch/x86/kernel/cpu/bugs.c                    | 131 +++++++++
 arch/x86/kernel/cpu/common.c                  |  32 +-
 arch/x86/kernel/cpu/cpu.h                     |  18 ++
 arch/x86/kernel/cpu/intel.c                   |   5 +
 arch/x86/kernel/cpu/tsx.c                     | 140 +++++++++
 arch/x86/kvm/x86.c                            |  19 ++
 drivers/base/cpu.c                            |   9 +
 include/linux/cpu.h                           |   3 +
 20 files changed, 881 insertions(+), 7 deletions(-)
 create mode 100644 Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
 create mode 100644 Documentation/x86/tsx_async_abort.rst
 create mode 100644 arch/x86/kernel/cpu/tsx.c

-- 
2.21.0