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 #include "qemu/module.h" 17 18 static int kvm_s390_skeys_enabled(S390SKeysState *ss) 19 { 20 S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss); 21 uint8_t single_key; 22 int r; 23 24 r = skeyclass->get_skeys(ss, 0, 1, &single_key); 25 if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) { 26 error_report("S390_GET_KEYS error %d", r); 27 } 28 return (r == 0); 29 } 30 31 static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn, 32 uint64_t count, uint8_t *keys) 33 { 34 struct kvm_s390_skeys args = { 35 .start_gfn = start_gfn, 36 .count = count, 37 .skeydata_addr = (__u64)keys 38 }; 39 40 return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args); 41 } 42 43 static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn, 44 uint64_t count, uint8_t *keys) 45 { 46 struct kvm_s390_skeys args = { 47 .start_gfn = start_gfn, 48 .count = count, 49 .skeydata_addr = (__u64)keys 50 }; 51 52 return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args); 53 } 54 55 static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data) 56 { 57 S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc); 58 DeviceClass *dc = DEVICE_CLASS(oc); 59 60 skeyclass->skeys_enabled = kvm_s390_skeys_enabled; 61 skeyclass->get_skeys = kvm_s390_skeys_get; 62 skeyclass->set_skeys = kvm_s390_skeys_set; 63 64 /* Reason: Internal device (only one skeys device for the whole memory) */ 65 dc->user_creatable = false; 66 } 67 68 static const TypeInfo kvm_s390_skeys_info = { 69 .name = TYPE_KVM_S390_SKEYS, 70 .parent = TYPE_S390_SKEYS, 71 .instance_size = sizeof(S390SKeysState), 72 .class_init = kvm_s390_skeys_class_init, 73 .class_size = sizeof(S390SKeysClass), 74 }; 75 76 static void kvm_s390_skeys_register_types(void) 77 { 78 type_register_static(&kvm_s390_skeys_info); 79 } 80 81 type_init(kvm_s390_skeys_register_types) 82