1 /* 2 * s390 storage key device 3 * 4 * Copyright 2015 IBM Corp. 5 * Author(s): Jason J. Herne <jjherne@linux.vnet.ibm.com> 6 * 7 * This work is licensed under the terms of the GNU GPL, version 2 or (at 8 * your option) any later version. See the COPYING file in the top-level 9 * directory. 10 */ 11 12 #include "qemu/osdep.h" 13 #include "hw/s390x/storage-keys.h" 14 #include "sysemu/kvm.h" 15 #include "qemu/error-report.h" 16 17 static int kvm_s390_skeys_enabled(S390SKeysState *ss) 18 { 19 S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss); 20 uint8_t single_key; 21 int r; 22 23 r = skeyclass->get_skeys(ss, 0, 1, &single_key); 24 if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) { 25 error_report("S390_GET_KEYS error %d", r); 26 } 27 return (r == 0); 28 } 29 30 static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn, 31 uint64_t count, uint8_t *keys) 32 { 33 struct kvm_s390_skeys args = { 34 .start_gfn = start_gfn, 35 .count = count, 36 .skeydata_addr = (__u64)keys 37 }; 38 39 return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args); 40 } 41 42 static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn, 43 uint64_t count, uint8_t *keys) 44 { 45 struct kvm_s390_skeys args = { 46 .start_gfn = start_gfn, 47 .count = count, 48 .skeydata_addr = (__u64)keys 49 }; 50 51 return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args); 52 } 53 54 static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data) 55 { 56 S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc); 57 DeviceClass *dc = DEVICE_CLASS(oc); 58 59 skeyclass->skeys_enabled = kvm_s390_skeys_enabled; 60 skeyclass->get_skeys = kvm_s390_skeys_get; 61 skeyclass->set_skeys = kvm_s390_skeys_set; 62 63 /* Reason: Internal device (only one skeys device for the whole memory) */ 64 dc->user_creatable = false; 65 } 66 67 static const TypeInfo kvm_s390_skeys_info = { 68 .name = TYPE_KVM_S390_SKEYS, 69 .parent = TYPE_S390_SKEYS, 70 .instance_size = sizeof(S390SKeysState), 71 .class_init = kvm_s390_skeys_class_init, 72 .class_size = sizeof(S390SKeysClass), 73 }; 74 75 static void kvm_s390_skeys_register_types(void) 76 { 77 type_register_static(&kvm_s390_skeys_info); 78 } 79 80 type_init(kvm_s390_skeys_register_types) 81