• Linus Torvalds's avatar
    Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · b9085bcb
    Linus Torvalds authored
    Pull KVM update from Paolo Bonzini:
     "Fairly small update, but there are some interesting new features.
    
      Common:
         Optional support for adding a small amount of polling on each HLT
         instruction executed in the guest (or equivalent for other
         architectures).  This can improve latency up to 50% on some
         scenarios (e.g. O_DSYNC writes or TCP_RR netperf tests).  This
         also has to be enabled manually for now, but the plan is to
         auto-tune this in the future.
    
      ARM/ARM64:
         The highlights are support for GICv3 emulation and dirty page
         tracking
    
      s390:
         Several optimizations and bugfixes.  Also a first: a feature
         exposed by KVM (UUID and long guest name in /proc/sysinfo) before
         it is available in IBM's hypervisor! :)
    
      MIPS:
         Bugfixes.
    
      x86:
         Support for PML (page modification logging, a new feature in
         Broadwell Xeons that speeds up dirty page tracking), nested
         virtualization improvements (nested APICv---a nice optimization),
         usual round of emulation fixes.
    
         There is also a new option to reduce latency of the TSC deadline
         timer in the guest; this needs to be tuned manually.
    
         Some commits are common between this pull and Catalin's; I see you
         have already included his tree.
    
      Powerpc:
         Nothing yet.
    
         The KVM/PPC changes will come in through the PPC maintainers,
         because I haven't received them yet and I might end up being
         offline for some part of next week"
    
    * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (130 commits)
      KVM: ia64: drop kvm.h from installed user headers
      KVM: x86: fix build with !CONFIG_SMP
      KVM: x86: emulate: correct page fault error code for NoWrite instructions
      KVM: Disable compat ioctl for s390
      KVM: s390: add cpu model support
      KVM: s390: use facilities and cpu_id per KVM
      KVM: s390/CPACF: Choose crypto control block format
      s390/kernel: Update /proc/sysinfo file with Extended Name and UUID
      KVM: s390: reenable LPP facility
      KVM: s390: floating irqs: fix user triggerable endless loop
      kvm: add halt_poll_ns module parameter
      kvm: remove KVM_MMIO_SIZE
      KVM: MIPS: Don't leak FPU/DSP to guest
      KVM: MIPS: Disable HTW while in guest
      KVM: nVMX: Enable nested posted interrupt processing
      KVM: nVMX: Enable nested virtual interrupt delivery
      KVM: nVMX: Enable nested apic register virtualization
      KVM: nVMX: Make nested control MSRs per-cpu
      KVM: nVMX: Enable nested virtualize x2apic mode
      KVM: nVMX: Prepare for using hardware MSR bitmap
      ...
    b9085bcb
sclp_early.c 8 KB