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12#include "qemu/osdep.h"
13#include "hw/boards.h"
14#include "migration/qemu-file.h"
15#include "hw/s390x/storage-attributes.h"
16#include "qemu/error-report.h"
17#include "sysemu/kvm.h"
18#include "exec/ram_addr.h"
19#include "cpu.h"
20#include "kvm_s390x.h"
21
22Object *kvm_s390_stattrib_create(void)
23{
24 if (kvm_enabled() &&
25 kvm_check_extension(kvm_state, KVM_CAP_S390_CMMA_MIGRATION)) {
26 return object_new(TYPE_KVM_S390_STATTRIB);
27 }
28 return NULL;
29}
30
31static void kvm_s390_stattrib_instance_init(Object *obj)
32{
33 KVMS390StAttribState *sas = KVM_S390_STATTRIB(obj);
34
35 sas->still_dirty = 0;
36}
37
38static int kvm_s390_stattrib_read_helper(S390StAttribState *sa,
39 uint64_t *start_gfn,
40 uint32_t count,
41 uint8_t *values,
42 uint32_t flags)
43{
44 KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
45 int r;
46 struct kvm_s390_cmma_log clog = {
47 .values = (uint64_t)values,
48 .start_gfn = *start_gfn,
49 .count = count,
50 .flags = flags,
51 };
52
53 r = kvm_vm_ioctl(kvm_state, KVM_S390_GET_CMMA_BITS, &clog);
54 if (r < 0) {
55 error_report("KVM_S390_GET_CMMA_BITS failed: %s", strerror(-r));
56 return r;
57 }
58
59 *start_gfn = clog.start_gfn;
60 sas->still_dirty = clog.remaining;
61 return clog.count;
62}
63
64static int kvm_s390_stattrib_get_stattr(S390StAttribState *sa,
65 uint64_t *start_gfn,
66 uint32_t count,
67 uint8_t *values)
68{
69 return kvm_s390_stattrib_read_helper(sa, start_gfn, count, values, 0);
70}
71
72static int kvm_s390_stattrib_peek_stattr(S390StAttribState *sa,
73 uint64_t start_gfn,
74 uint32_t count,
75 uint8_t *values)
76{
77 return kvm_s390_stattrib_read_helper(sa, &start_gfn, count, values,
78 KVM_S390_CMMA_PEEK);
79}
80
81static int kvm_s390_stattrib_set_stattr(S390StAttribState *sa,
82 uint64_t start_gfn,
83 uint32_t count,
84 uint8_t *values)
85{
86 KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
87 MachineState *machine = MACHINE(qdev_get_machine());
88 unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE;
89
90 if (start_gfn + count > max) {
91 error_report("Out of memory bounds when setting storage attributes");
92 return -1;
93 }
94 if (!sas->incoming_buffer) {
95 sas->incoming_buffer = g_malloc0(max);
96 }
97
98 memcpy(sas->incoming_buffer + start_gfn, values, count);
99
100 return 0;
101}
102
103static void kvm_s390_stattrib_synchronize(S390StAttribState *sa)
104{
105 KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
106 MachineState *machine = MACHINE(qdev_get_machine());
107 unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE;
108 unsigned long cx, len = 1 << 19;
109 int r;
110 struct kvm_s390_cmma_log clog = {
111 .flags = 0,
112 .mask = ~0ULL,
113 };
114
115 if (sas->incoming_buffer) {
116 for (cx = 0; cx + len <= max; cx += len) {
117 clog.start_gfn = cx;
118 clog.count = len;
119 clog.values = (uint64_t)(sas->incoming_buffer + cx);
120 r = kvm_vm_ioctl(kvm_state, KVM_S390_SET_CMMA_BITS, &clog);
121 if (r) {
122 error_report("KVM_S390_SET_CMMA_BITS failed: %s", strerror(-r));
123 return;
124 }
125 }
126 if (cx < max) {
127 clog.start_gfn = cx;
128 clog.count = max - cx;
129 clog.values = (uint64_t)(sas->incoming_buffer + cx);
130 r = kvm_vm_ioctl(kvm_state, KVM_S390_SET_CMMA_BITS, &clog);
131 if (r) {
132 error_report("KVM_S390_SET_CMMA_BITS failed: %s", strerror(-r));
133 }
134 }
135 g_free(sas->incoming_buffer);
136 sas->incoming_buffer = NULL;
137 }
138}
139
140static int kvm_s390_stattrib_set_migrationmode(S390StAttribState *sa, bool val)
141{
142 struct kvm_device_attr attr = {
143 .group = KVM_S390_VM_MIGRATION,
144 .attr = val,
145 .addr = 0,
146 };
147 return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
148}
149
150static long long kvm_s390_stattrib_get_dirtycount(S390StAttribState *sa)
151{
152 KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
153 uint8_t val[8];
154
155 kvm_s390_stattrib_peek_stattr(sa, 0, 1, val);
156 return sas->still_dirty;
157}
158
159static int kvm_s390_stattrib_get_active(S390StAttribState *sa)
160{
161 return kvm_s390_cmma_active() && sa->migration_enabled;
162}
163
164static void kvm_s390_stattrib_class_init(ObjectClass *oc, void *data)
165{
166 S390StAttribClass *sac = S390_STATTRIB_CLASS(oc);
167 DeviceClass *dc = DEVICE_CLASS(oc);
168
169 sac->get_stattr = kvm_s390_stattrib_get_stattr;
170 sac->peek_stattr = kvm_s390_stattrib_peek_stattr;
171 sac->set_stattr = kvm_s390_stattrib_set_stattr;
172 sac->set_migrationmode = kvm_s390_stattrib_set_migrationmode;
173 sac->get_dirtycount = kvm_s390_stattrib_get_dirtycount;
174 sac->synchronize = kvm_s390_stattrib_synchronize;
175 sac->get_active = kvm_s390_stattrib_get_active;
176
177
178 dc->user_creatable = false;
179}
180
181static const TypeInfo kvm_s390_stattrib_info = {
182 .name = TYPE_KVM_S390_STATTRIB,
183 .parent = TYPE_S390_STATTRIB,
184 .instance_init = kvm_s390_stattrib_instance_init,
185 .instance_size = sizeof(KVMS390StAttribState),
186 .class_init = kvm_s390_stattrib_class_init,
187 .class_size = sizeof(S390StAttribClass),
188};
189
190static void kvm_s390_stattrib_register_types(void)
191{
192 type_register_static(&kvm_s390_stattrib_info);
193}
194
195type_init(kvm_s390_stattrib_register_types)
196
