• Linus Torvalds's avatar
    Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · c9b012e5
    Linus Torvalds authored
    Pull arm64 updates from Will Deacon:
     "The big highlight is support for the Scalable Vector Extension (SVE)
      which required extensive ABI work to ensure we don't break existing
      applications by blowing away their signal stack with the rather large
      new vector context (<= 2 kbit per vector register). There's further
      work to be done optimising things like exception return, but the ABI
      is solid now.
    
      Much of the line count comes from some new PMU drivers we have, but
      they're pretty self-contained and I suspect we'll have more of them in
      future.
    
      Plenty of acronym soup here:
    
       - initial support for the Scalable Vector Extension (SVE)
    
       - improved handling for SError interrupts (required to handle RAS
         events)
    
       - enable GCC support for 128-bit integer types
    
       - remove kernel text addresses from backtraces and register dumps
    
       - use of WFE to implement long delay()s
    
       - ACPI IORT updates from Lorenzo Pieralisi
    
       - perf PMU driver for the Statistical Profiling Extension (SPE)
    
       - perf PMU driver for Hisilicon's system PMUs
    
       - misc cleanups and non-critical fixes"
    
    * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (97 commits)
      arm64: Make ARMV8_DEPRECATED depend on SYSCTL
      arm64: Implement __lshrti3 library function
      arm64: support __int128 on gcc 5+
      arm64/sve: Add documentation
      arm64/sve: Detect SVE and activate runtime support
      arm64/sve: KVM: Hide SVE from CPU features exposed to guests
      arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
      arm64/sve: KVM: Prevent guests from using SVE
      arm64/sve: Add sysctl to set the default vector length for new processes
      arm64/sve: Add prctl controls for userspace vector length management
      arm64/sve: ptrace and ELF coredump support
      arm64/sve: Preserve SVE registers around EFI runtime service calls
      arm64/sve: Preserve SVE registers around kernel-mode NEON use
      arm64/sve: Probe SVE capabilities and usable vector lengths
      arm64: cpufeature: Move sys_caps_initialised declarations
      arm64/sve: Backend logic for setting the vector length
      arm64/sve: Signal handling support
      arm64/sve: Support vector length resetting for new processes
      arm64/sve: Core task context handling
      arm64/sve: Low-level CPU setup
      ...
    c9b012e5
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