Merge tag 'kvm-s390-master-4.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / arch / s390 / kvm / kvm-s390.c
index 52880e980a336a80263cd83c70aeabaad6726ea1..1371dff2b90d14244a52da555d9d4914a1be2f45 100644 (file)
@@ -421,6 +421,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
        case KVM_CAP_S390_GS:
                r = test_facility(133);
                break;
+       case KVM_CAP_S390_BPB:
+               r = test_facility(82);
+               break;
        default:
                r = 0;
        }
@@ -2202,6 +2205,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
        kvm_s390_set_prefix(vcpu, 0);
        if (test_kvm_facility(vcpu->kvm, 64))
                vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
+       if (test_kvm_facility(vcpu->kvm, 82))
+               vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC;
        if (test_kvm_facility(vcpu->kvm, 133))
                vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
        /* fprs can be synchronized via vrs, even if the guest has no vx. With
@@ -2343,6 +2348,7 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
        current->thread.fpu.fpc = 0;
        vcpu->arch.sie_block->gbea = 1;
        vcpu->arch.sie_block->pp = 0;
+       vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
        vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
        kvm_clear_async_pf_completion_queue(vcpu);
        if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
@@ -3302,6 +3308,11 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
                vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
                vcpu->arch.gs_enabled = 1;
        }
+       if ((kvm_run->kvm_dirty_regs & KVM_SYNC_BPBC) &&
+           test_kvm_facility(vcpu->kvm, 82)) {
+               vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
+               vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0;
+       }
        save_access_regs(vcpu->arch.host_acrs);
        restore_access_regs(vcpu->run->s.regs.acrs);
        /* save host (userspace) fprs/vrs */
@@ -3348,6 +3359,7 @@ static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
        kvm_run->s.regs.pft = vcpu->arch.pfault_token;
        kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
        kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
+       kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC;
        save_access_regs(vcpu->run->s.regs.acrs);
        restore_access_regs(vcpu->arch.host_acrs);
        /* Save guest register state */
@@ -3374,7 +3386,6 @@ static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
        int rc;
-       sigset_t sigsaved;
 
        if (kvm_run->immediate_exit)
                return -EINTR;
@@ -3384,8 +3395,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
                return 0;
        }
 
-       if (vcpu->sigset_active)
-               sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
+       kvm_sigset_activate(vcpu);
 
        if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
                kvm_s390_vcpu_start(vcpu);
@@ -3419,8 +3429,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
        disable_cpu_timer_accounting(vcpu);
        store_regs(vcpu, kvm_run);
 
-       if (vcpu->sigset_active)
-               sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+       kvm_sigset_deactivate(vcpu);
 
        vcpu->stat.exit_userspace++;
        return rc;