• Linus Torvalds's avatar
    Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d6ec9d9a
    Linus Torvalds authored
    Pull x86 core updates from Ingo Molnar:
     "Note that in this cycle most of the x86 topics interacted at a level
      that caused them to be merged into tip:x86/asm - but this should be a
      temporary phenomenon, hopefully we'll back to the usual patterns in
      the next merge window.
    
      The main changes in this cycle were:
    
      Hardware enablement:
    
       - Add support for the Intel UMIP (User Mode Instruction Prevention)
         CPU feature. This is a security feature that disables certain
         instructions such as SGDT, SLDT, SIDT, SMSW and STR. (Ricardo Neri)
    
         [ Note that this is disabled by default for now, there are some
           smaller enhancements in the pipeline that I'll follow up with in
           the next 1-2 days, which allows this to be enabled by default.]
    
       - Add support for the AMD SEV (Secure Encrypted Virtualization) CPU
         feature, on top of SME (Secure Memory Encryption) support that was
         added in v4.14. (Tom Lendacky, Brijesh Singh)
    
       - Enable new SSE/AVX/AVX512 CPU features: AVX512_VBMI2, GFNI, VAES,
         VPCLMULQDQ, AVX512_VNNI, AVX512_BITALG. (Gayatri Kammela)
    
      Other changes:
    
       - A big series of entry code simplifications and enhancements (Andy
         Lutomirski)
    
       - Make the ORC unwinder default on x86 and various objtool
         enhancements. (Josh Poimboeuf)
    
       - 5-level paging enhancements (Kirill A. Shutemov)
    
       - Micro-optimize the entry code a bit (Borislav Petkov)
    
       - Improve the handling of interdependent CPU features in the early
         FPU init code (Andi Kleen)
    
       - Build system enhancements (Changbin Du, Masahiro Yamada)
    
       - ... plus misc enhancements, fixes and cleanups"
    
    * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (118 commits)
      x86/build: Make the boot image generation less verbose
      selftests/x86: Add tests for the STR and SLDT instructions
      selftests/x86: Add tests for User-Mode Instruction Prevention
      x86/traps: Fix up general protection faults caused by UMIP
      x86/umip: Enable User-Mode Instruction Prevention at runtime
      x86/umip: Force a page fault when unable to copy emulated result to user
      x86/umip: Add emulation code for UMIP instructions
      x86/cpufeature: Add User-Mode Instruction Prevention definitions
      x86/insn-eval: Add support to resolve 16-bit address encodings
      x86/insn-eval: Handle 32-bit address encodings in virtual-8086 mode
      x86/insn-eval: Add wrapper function for 32 and 64-bit addresses
      x86/insn-eval: Add support to resolve 32-bit address encodings
      x86/insn-eval: Compute linear address in several utility functions
      resource: Fix resource_size.cocci warnings
      X86/KVM: Clear encryption attribute when SEV is active
      X86/KVM: Decrypt shared per-cpu variables when SEV is active
      percpu: Introduce DEFINE_PER_CPU_DECRYPTED
      x86: Add support for changing memory encryption attribute in early boot
      x86/io: Unroll string I/O when SEV is active
      x86/boot: Add early boot support when running with SEV active
      ...
    d6ec9d9a
Kconfig 93 KB