• Linus Torvalds's avatar
    Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 6304672b
    Linus Torvalds authored
    Pull x86/pti updates from Thomas Gleixner:
     "Another set of melted spectrum related changes:
    
       - Code simplifications and cleanups for RSB and retpolines.
    
       - Make the indirect calls in KVM speculation safe.
    
       - Whitelist CPUs which are known not to speculate from Meltdown and
         prepare for the new CPUID flag which tells the kernel that a CPU is
         not affected.
    
       - A less rigorous variant of the module retpoline check which merily
         warns when a non-retpoline protected module is loaded and reflects
         that fact in the sysfs file.
    
       - Prepare for Indirect Branch Prediction Barrier support.
    
       - Prepare for exposure of the Speculation Control MSRs to guests, so
         guest OSes which depend on those "features" can use them. Includes
         a blacklist of the broken microcodes. The actual exposure of the
         MSRs through KVM is still being worked on"
    
    * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
      x86/speculation: Simplify indirect_branch_prediction_barrier()
      x86/retpoline: Simplify vmexit_fill_RSB()
      x86/cpufeatures: Clean up Spectre v2 related CPUID flags
      x86/cpu/bugs: Make retpoline module warning conditional
      x86/bugs: Drop one "mitigation" from dmesg
      x86/nospec: Fix header guards names
      x86/alternative: Print unadorned pointers
      x86/speculation: Add basic IBPB (Indirect Branch Prediction Barrier) support
      x86/cpufeature: Blacklist SPEC_CTRL/PRED_CMD on early Spectre v2 microcodes
      x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown
      x86/msr: Add definitions for new speculation control MSRs
      x86/cpufeatures: Add AMD feature bits for Speculation Control
      x86/cpufeatures: Add Intel feature bits for Speculation Control
      x86/cpufeatures: Add CPUID_7_EDX CPUID leaf
      module/retpoline: Warn about missing retpoline in module
      KVM: VMX: Make indirect call speculation safe
      KVM: x86: Make indirect calls in emulator speculation safe
    6304672b
modpost.c 66.4 KB