diff options
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index f746a35e3950..efb902cdd1d2 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -317,8 +317,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) break; case KVM_CAP_NR_VCPUS: case KVM_CAP_MAX_VCPUS: - r = sclp.has_esca ? KVM_S390_ESCA_CPU_SLOTS - : KVM_S390_BSCA_CPU_SLOTS; + r = KVM_S390_BSCA_CPU_SLOTS; + if (sclp.has_esca && sclp.has_64bscao) + r = KVM_S390_ESCA_CPU_SLOTS; break; case KVM_CAP_NR_MEMSLOTS: r = KVM_USER_MEM_SLOTS; @@ -1295,6 +1296,7 @@ static void sca_dispose(struct kvm *kvm) int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) { + gfp_t alloc_flags = GFP_KERNEL; int i, rc; char debug_name[16]; static unsigned long sca_offset; @@ -1319,8 +1321,10 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500); kvm->arch.use_esca = 0; /* start with basic SCA */ + if (!sclp.has_64bscao) + alloc_flags |= GFP_DMA; rwlock_init(&kvm->arch.sca_lock); - kvm->arch.sca = (struct bsca_block *) get_zeroed_page(GFP_KERNEL); + kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags); if (!kvm->arch.sca) goto out_err; spin_lock(&kvm_lock); @@ -1567,7 +1571,7 @@ static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id) if (id < KVM_S390_BSCA_CPU_SLOTS) return true; - if (!sclp.has_esca) + if (!sclp.has_esca || !sclp.has_64bscao) return false; mutex_lock(&kvm->lock); |