Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "s390 and POWER bug fixes, plus enabling the KVM-VFIO interface on
  s390"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM doc: Fix KVM_SMI chapter number
  KVM: s390: fix memory overwrites when vx is disabled
  KVM: s390: Enable the KVM-VFIO device
  KVM: s390: fix guest fprs memory leak
  KVM: PPC: Fix ONE_REG AltiVec support
  KVM: PPC: Increase memslots to 512
  KVM: PPC: Book3S PR: Remove unused variable 'vcpu_book3s'
  KVM: PPC: Fix emulation of H_SET_DABR/X on POWER8
  KVM: PPC: Book3S HV: Handle unexpected traps in guest entry/exit code better

diff --combined arch/powerpc/kvm/book3s_hv.c
index cff207b72c46ae0b54cf48db5e4a3aa828f2fc29,2675ae3be6432b4b71af7868e11cd45d7a12fe0f..baeddb06811d738a6ea8be4ce920e5ea39a9645a
--- 1/arch/powerpc/kvm/book3s_hv.c
--- 2/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@@ -833,6 -833,24 +833,24 @@@ static int kvmppc_handle_exit_hv(struc
  
        vcpu->stat.sum_exits++;
  
+       /*
+        * This can happen if an interrupt occurs in the last stages
+        * of guest entry or the first stages of guest exit (i.e. after
+        * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV
+        * and before setting it to KVM_GUEST_MODE_HOST_HV).
+        * That can happen due to a bug, or due to a machine check
+        * occurring at just the wrong time.
+        */
+       if (vcpu->arch.shregs.msr & MSR_HV) {
+               printk(KERN_EMERG "KVM trap in HV mode!\n");
+               printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
+                       vcpu->arch.trap, kvmppc_get_pc(vcpu),
+                       vcpu->arch.shregs.msr);
+               kvmppc_dump_regs(vcpu);
+               run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+               run->hw.hardware_exit_reason = vcpu->arch.trap;
+               return RESUME_HOST;
+       }
        run->exit_reason = KVM_EXIT_UNKNOWN;
        run->ready_for_interrupt_injection = 1;
        switch (vcpu->arch.trap) {
@@@ -2700,8 -2718,9 +2718,8 @@@ static int kvmppc_vcpu_run_hv(struct kv
                        goto out;
        }
  
 -      flush_fp_to_thread(current);
 -      flush_altivec_to_thread(current);
 -      flush_vsx_to_thread(current);
 +      flush_all_to_thread(current);
 +
        vcpu->arch.wqp = &vcpu->arch.vcore->wq;
        vcpu->arch.pgdir = current->mm->pgd;
        vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;