• Linus Torvalds's avatar
    Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 0aebc6a4
    Linus Torvalds authored
    Pull arm64 updates from Catalin Marinas:
     "The main theme of this pull request is security covering variants 2
      and 3 for arm64. I expect to send additional patches next week
      covering an improved firmware interface (requires firmware changes)
      for variant 2 and way for KPTI to be disabled on unaffected CPUs
      (Cavium's ThunderX doesn't work properly with KPTI enabled because of
      a hardware erratum).
    
      Summary:
    
       - Security mitigations:
          - variant 2: invalidate the branch predictor with a call to
            secure firmware
          - variant 3: implement KPTI for arm64
    
       - 52-bit physical address support for arm64 (ARMv8.2)
    
       - arm64 support for RAS (firmware first only) and SDEI (software
         delegated exception interface; allows firmware to inject a RAS
         error into the OS)
    
       - perf support for the ARM DynamIQ Shared Unit PMU
    
       - CPUID and HWCAP bits updated for new floating point multiplication
         instructions in ARMv8.4
    
       - remove some virtual memory layout printks during boot
    
       - fix initial page table creation to cope with larger than 32M kernel
         images when 16K pages are enabled"
    
    * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (104 commits)
      arm64: Fix TTBR + PAN + 52-bit PA logic in cpu_do_switch_mm
      arm64: Turn on KPTI only on CPUs that need it
      arm64: Branch predictor hardening for Cavium ThunderX2
      arm64: Run enable method for errata work arounds on late CPUs
      arm64: Move BP hardening to check_and_switch_context
      arm64: mm: ignore memory above supported physical address size
      arm64: kpti: Fix the interaction between ASID switching and software PAN
      KVM: arm64: Emulate RAS error registers and set HCR_EL2's TERR & TEA
      KVM: arm64: Handle RAS SErrors from EL2 on guest exit
      KVM: arm64: Handle RAS SErrors from EL1 on guest exit
      KVM: arm64: Save ESR_EL2 on guest SError
      KVM: arm64: Save/Restore guest DISR_EL1
      KVM: arm64: Set an impdef ESR for Virtual-SError using VSESR_EL2.
      KVM: arm/arm64: mask/unmask daif around VHE guests
      arm64: kernel: Prepare for a DISR user
      arm64: Unconditionally enable IESB on exception entry/return for firmware-first
      arm64: kernel: Survive corrected RAS errors notified by SError
      arm64: cpufeature: Detect CPU RAS Extentions
      arm64: sysreg: Move to use definitions for all the SCTLR bits
      arm64: cpufeature: __this_cpu_has_cap() shouldn't stop early
      ...
    0aebc6a4
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