• Linus Torvalds's avatar
    Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 933425fb
    Linus Torvalds authored
    Pull KVM updates from Paolo Bonzini:
     "First batch of KVM changes for 4.4.
         A bunch of fixes and optimizations for interrupt and time handling.
         Mostly bug fixes.
         No big features, but many small fixes and prerequisites including:
          - a number of fixes for the arch-timer
          - introducing proper level-triggered semantics for the arch-timers
          - a series of patches to synchronously halt a guest (prerequisite
            for IRQ forwarding)
          - some tracepoint improvements
          - a tweak for the EL2 panic handlers
          - some more VGIC cleanups getting rid of redundant state
         Quite a few changes:
          - support for VT-d posted interrupts (i.e. PCI devices can inject
            interrupts directly into vCPUs).  This introduces a new
            component (in virt/lib/) that connects VFIO and KVM together.
            The same infrastructure will be used for ARM interrupt
            forwarding as well.
          - more Hyper-V features, though the main one Hyper-V synthetic
            interrupt controller will have to wait for 4.5.  These will let
            KVM expose Hyper-V devices.
          - nested virtualization now supports VPID (same as PCID but for
            vCPUs) which makes it quite a bit faster
          - for future hardware that supports NVDIMM, there is support for
            clflushopt, clwb, pcommit
          - support for "split irqchip", i.e.  LAPIC in kernel +
            IOAPIC/PIC/PIT in userspace, which reduces the attack surface of
            the hypervisor
          - obligatory smattering of SMM fixes
          - on the guest side, stable scheduler clock support was rewritten
            to not require help from the hypervisor"
    * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (123 commits)
      KVM: VMX: Fix commit which broke PML
      KVM: x86: obey KVM_X86_QUIRK_CD_NW_CLEARED in kvm_set_cr0()
      KVM: x86: allow RSM from 64-bit mode
      KVM: VMX: fix SMEP and SMAP without EPT
      KVM: x86: move kvm_set_irq_inatomic to legacy device assignment
      KVM: device assignment: remove pointless #ifdefs
      KVM: x86: merge kvm_arch_set_irq with kvm_set_msi_inatomic
      KVM: x86: zero apic_arb_prio on reset
      drivers/hv: share Hyper-V SynIC constants with userspace
      KVM: x86: handle SMBASE as physical address in RSM
      KVM: x86: add read_phys to x86_emulate_ops
      KVM: x86: removing unused variable
      KVM: don't pointlessly leave KVM_COMPAT=y in non-KVM configs
      KVM: arm/arm64: Merge vgic_set_lr() and vgic_sync_lr_elrsr()
      KVM: arm/arm64: Clean up vgic_retire_lr() and surroundings
      KVM: arm/arm64: Optimize away redundant LR tracking
      KVM: s390: use simple switch statement as multiplexer
      KVM: s390: drop useless newline in debugging data
      KVM: s390: SCA must not cross page boundaries
      KVM: arm: Do not indent the arguments of DECLARE_BITMAP
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