• Linus Torvalds's avatar
    Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 410feb75
    Linus Torvalds authored
    Pull arm64 updates from Catalin Marinas:
     "Apart from the core arm64 and perf changes, the Spectre v4 mitigation
      touches the arm KVM code and the ACPI PPTT support touches drivers/
      (acpi and cacheinfo). I should have the maintainers' acks in place.
    
      Summary:
    
       - Spectre v4 mitigation (Speculative Store Bypass Disable) support
         for arm64 using SMC firmware call to set a hardware chicken bit
    
       - ACPI PPTT (Processor Properties Topology Table) parsing support and
         enable the feature for arm64
    
       - Report signal frame size to user via auxv (AT_MINSIGSTKSZ). The
         primary motivation is Scalable Vector Extensions which requires
         more space on the signal frame than the currently defined
         MINSIGSTKSZ
    
       - ARM perf patches: allow building arm-cci as module, demote
         dev_warn() to dev_dbg() in arm-ccn event_init(), miscellaneous
         cleanups
    
       - cmpwait() WFE optimisation to avoid some spurious wakeups
    
       - L1_CACHE_BYTES reverted back to 64 (for performance reasons that
         have to do with some network allocations) while keeping
         ARCH_DMA_MINALIGN to 128. cache_line_size() returns the actual
         hardware Cache Writeback Granule
    
       - Turn LSE atomics on by default in Kconfig
    
       - Kernel fault reporting tidying
    
       - Some #include and miscellaneous cleanups"
    
    * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (53 commits)
      arm64: Fix syscall restarting around signal suppressed by tracer
      arm64: topology: Avoid checking numa mask for scheduler MC selection
      ACPI / PPTT: fix build when CONFIG_ACPI_PPTT is not enabled
      arm64: cpu_errata: include required headers
      arm64: KVM: Move VCPU_WORKAROUND_2_FLAG macros to the top of the file
      arm64: signal: Report signal frame size to userspace via auxv
      arm64/sve: Thin out initialisation sanity-checks for sve_max_vl
      arm64: KVM: Add ARCH_WORKAROUND_2 discovery through ARCH_FEATURES_FUNC_ID
      arm64: KVM: Handle guest's ARCH_WORKAROUND_2 requests
      arm64: KVM: Add ARCH_WORKAROUND_2 support for guests
      arm64: KVM: Add HYP per-cpu accessors
      arm64: ssbd: Add prctl interface for per-thread mitigation
      arm64: ssbd: Introduce thread flag to control userspace mitigation
      arm64: ssbd: Restore mitigation status on CPU resume
      arm64: ssbd: Skip apply_ssbd if not using dynamic mitigation
      arm64: ssbd: Add global mitigation state accessor
      arm64: Add 'ssbd' command-line option
      arm64: Add ARCH_WORKAROUND_2 probing
      arm64: Add per-cpu infrastructure to call ARCH_WORKAROUND_2
      arm64: Call ARCH_WORKAROUND_2 on transitions between EL0 and EL1
      ...
    410feb75
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