[PATCH v3 0/3] arch/x86: Enable MPK feature on AMD

[Babu Moger]

AMD's next generation of EPYC processors support the MPK (Memory
Protection Keys) feature.

AMD documentation for MPK feature is available at "AMD64 Architecture
Programmerâs Manual Volume 2: System Programming, Pub. 24593 Rev. 3.34,
Section 5.6.6 Memory Protection Keys (MPK) Bit".

The documentation can be obtained at the link below:
https://bugzilla.kernel.org/show_bug.cgi?id=206537

This series enables the feature on AMD and updates config parameters
to reflect the MPK support on generic x86 platforms.

---
v3:
  - Fixed the problem Jim Mattson pointed out which can cause pkru
    resources to get corrupted during host and guest switches. 
  - Moved the PKU feature detection code from VMX.c to common code.
  
v2:
  https://lore.kernel.org/lkml/158897190718.22378.3974700869904223395.stgit@xxxxxxxxxxxxxxxxxxx/
  - Introduced intermediate config option X86_MEMORY_PROTECTION_KEYS to
    avoid user propmpts. Kept X86_INTEL_MEMORY_PROTECTION_KEYS as is.
    Eventually, we will be moving to X86_MEMORY_PROTECTION_KEYS after
    couple of kernel revisions. 
  - Moved pkru data structures to kvm_vcpu_arch. Moved save/restore pkru
    to kvm_load_host_xsave_state/kvm_load_guest_xsave_state.

v1:
  https://lore.kernel.org/lkml/158880240546.11615.2219410169137148044.stgit@xxxxxxxxxxxxxxxxxxx/

Babu Moger (3):
      arch/x86: Rename config X86_INTEL_MEMORY_PROTECTION_KEYS to generic x86
      KVM: x86: Move pkru save/restore to x86.c
      KVM: x86: Move MPK feature detection to common code


 Documentation/core-api/protection-keys.rst     |    3 ++-
 arch/x86/Kconfig                               |   11 +++++++++--
 arch/x86/include/asm/disabled-features.h       |    4 ++--
 arch/x86/include/asm/kvm_host.h                |    1 +
 arch/x86/include/asm/mmu.h                     |    2 +-
 arch/x86/include/asm/mmu_context.h             |    4 ++--
 arch/x86/include/asm/pgtable.h                 |    4 ++--
 arch/x86/include/asm/pgtable_types.h           |    2 +-
 arch/x86/include/asm/special_insns.h           |    2 +-
 arch/x86/include/uapi/asm/mman.h               |    2 +-
 arch/x86/kernel/cpu/common.c                   |    2 +-
 arch/x86/kvm/cpuid.c                           |    4 +++-
 arch/x86/kvm/vmx/vmx.c                         |   22 ----------------------
 arch/x86/kvm/x86.c                             |   17 +++++++++++++++++
 arch/x86/mm/Makefile                           |    2 +-
 arch/x86/mm/pkeys.c                            |    2 +-
 scripts/headers_install.sh                     |    2 +-
 tools/arch/x86/include/asm/disabled-features.h |    4 ++--
 18 files changed, 48 insertions(+), 42 deletions(-)

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