xref: /openbmc/qemu/hw/s390x/s390-skeys-kvm.c (revision 5227b326)
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 
kvm_s390_skeys_are_enabled(S390SKeysState * ss)18 static bool kvm_s390_skeys_are_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 
kvm_s390_skeys_get(S390SKeysState * ss,uint64_t start_gfn,uint64_t count,uint8_t * keys)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 
kvm_s390_skeys_set(S390SKeysState * ss,uint64_t start_gfn,uint64_t count,uint8_t * keys)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 
kvm_s390_skeys_class_init(ObjectClass * oc,void * data)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_are_enabled = kvm_s390_skeys_are_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 
kvm_s390_skeys_register_types(void)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