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[qemu.git] / hw / ppc / spapr_cpu_core.c
1 /*
2  * sPAPR CPU core device, acts as container of CPU thread devices.
3  *
4  * Copyright (C) 2016 Bharata B Rao <[email protected]>
5  *
6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
7  * See the COPYING file in the top-level directory.
8  */
9 #include "hw/cpu/core.h"
10 #include "hw/ppc/spapr_cpu_core.h"
11 #include "target/ppc/cpu.h"
12 #include "hw/ppc/spapr.h"
13 #include "hw/boards.h"
14 #include "qapi/error.h"
15 #include "sysemu/cpus.h"
16 #include "sysemu/kvm.h"
17 #include "target/ppc/kvm_ppc.h"
18 #include "hw/ppc/ppc.h"
19 #include "target/ppc/mmu-hash64.h"
20 #include "sysemu/numa.h"
21 #include "qemu/error-report.h"
22
23 static void spapr_cpu_reset(void *opaque)
24 {
25     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
26     PowerPCCPU *cpu = opaque;
27     CPUState *cs = CPU(cpu);
28     CPUPPCState *env = &cpu->env;
29
30     cpu_reset(cs);
31
32     /* All CPUs start halted.  CPU0 is unhalted from the machine level
33      * reset code and the rest are explicitly started up by the guest
34      * using an RTAS call */
35     cs->halted = 1;
36
37     env->spr[SPR_HIOR] = 0;
38
39     /*
40      * This is a hack for the benefit of KVM PR - it abuses the SDR1
41      * slot in kvm_sregs to communicate the userspace address of the
42      * HPT
43      */
44     if (kvm_enabled()) {
45         env->spr[SPR_SDR1] = (target_ulong)(uintptr_t)spapr->htab
46             | (spapr->htab_shift - 18);
47         if (kvmppc_put_books_sregs(cpu) < 0) {
48             error_report("Unable to update SDR1 in KVM");
49             exit(1);
50         }
51     }
52 }
53
54 static void spapr_cpu_destroy(PowerPCCPU *cpu)
55 {
56     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
57
58     xics_cpu_destroy(XICS_FABRIC(spapr), cpu);
59     qemu_unregister_reset(spapr_cpu_reset, cpu);
60 }
61
62 static void spapr_cpu_init(sPAPRMachineState *spapr, PowerPCCPU *cpu,
63                            Error **errp)
64 {
65     CPUPPCState *env = &cpu->env;
66
67     /* Set time-base frequency to 512 MHz */
68     cpu_ppc_tb_init(env, SPAPR_TIMEBASE_FREQ);
69
70     /* Enable PAPR mode in TCG or KVM */
71     cpu_ppc_set_papr(cpu, PPC_VIRTUAL_HYPERVISOR(spapr));
72
73     if (cpu->max_compat) {
74         Error *local_err = NULL;
75
76         ppc_set_compat(cpu, cpu->max_compat, &local_err);
77         if (local_err) {
78             error_propagate(errp, local_err);
79             return;
80         }
81     }
82
83     qemu_register_reset(spapr_cpu_reset, cpu);
84     spapr_cpu_reset(cpu);
85 }
86
87 /*
88  * Return the sPAPR CPU core type for @model which essentially is the CPU
89  * model specified with -cpu cmdline option.
90  */
91 char *spapr_get_cpu_core_type(const char *model)
92 {
93     char *core_type;
94     gchar **model_pieces = g_strsplit(model, ",", 2);
95
96     core_type = g_strdup_printf("%s-%s", model_pieces[0], TYPE_SPAPR_CPU_CORE);
97
98     /* Check whether it exists or whether we have to look up an alias name */
99     if (!object_class_by_name(core_type)) {
100         const char *realmodel;
101
102         g_free(core_type);
103         core_type = NULL;
104         realmodel = ppc_cpu_lookup_alias(model_pieces[0]);
105         if (realmodel) {
106             core_type = spapr_get_cpu_core_type(realmodel);
107         }
108     }
109
110     g_strfreev(model_pieces);
111     return core_type;
112 }
113
114 static void spapr_cpu_core_unrealizefn(DeviceState *dev, Error **errp)
115 {
116     sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
117     sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(dev));
118     const char *typename = object_class_get_name(scc->cpu_class);
119     size_t size = object_type_get_instance_size(typename);
120     CPUCore *cc = CPU_CORE(dev);
121     int i;
122
123     for (i = 0; i < cc->nr_threads; i++) {
124         void *obj = sc->threads + i * size;
125         DeviceState *dev = DEVICE(obj);
126         CPUState *cs = CPU(dev);
127         PowerPCCPU *cpu = POWERPC_CPU(cs);
128
129         spapr_cpu_destroy(cpu);
130         object_unparent(cpu->intc);
131         cpu_remove_sync(cs);
132         object_unparent(obj);
133     }
134     g_free(sc->threads);
135 }
136
137 static void spapr_cpu_core_realize_child(Object *child, Error **errp)
138 {
139     Error *local_err = NULL;
140     sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
141     CPUState *cs = CPU(child);
142     PowerPCCPU *cpu = POWERPC_CPU(cs);
143     Object *obj;
144
145     obj = object_new(spapr->icp_type);
146     object_property_add_child(OBJECT(cpu), "icp", obj, &error_abort);
147     object_unref(obj);
148     object_property_add_const_link(obj, "xics", OBJECT(spapr), &error_abort);
149     object_property_set_bool(obj, true, "realized", &local_err);
150     if (local_err) {
151         goto error;
152     }
153
154     object_property_set_bool(child, true, "realized", &local_err);
155     if (local_err) {
156         goto error;
157     }
158
159     spapr_cpu_init(spapr, cpu, &local_err);
160     if (local_err) {
161         goto error;
162     }
163
164     xics_cpu_setup(XICS_FABRIC(spapr), cpu, ICP(obj));
165     return;
166
167 error:
168     object_unparent(obj);
169     error_propagate(errp, local_err);
170 }
171
172 static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
173 {
174     sPAPRCPUCore *sc = SPAPR_CPU_CORE(OBJECT(dev));
175     sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_GET_CLASS(OBJECT(dev));
176     CPUCore *cc = CPU_CORE(OBJECT(dev));
177     const char *typename = object_class_get_name(scc->cpu_class);
178     size_t size = object_type_get_instance_size(typename);
179     Error *local_err = NULL;
180     void *obj;
181     int i, j;
182
183     sc->threads = g_malloc0(size * cc->nr_threads);
184     for (i = 0; i < cc->nr_threads; i++) {
185         char id[32];
186         CPUState *cs;
187
188         obj = sc->threads + i * size;
189
190         object_initialize(obj, size, typename);
191         cs = CPU(obj);
192         cs->cpu_index = cc->core_id + i;
193
194         /* Set NUMA node for the threads belonged to core  */
195         cs->numa_node = sc->node_id;
196
197         snprintf(id, sizeof(id), "thread[%d]", i);
198         object_property_add_child(OBJECT(sc), id, obj, &local_err);
199         if (local_err) {
200             goto err;
201         }
202         object_unref(obj);
203     }
204
205     for (j = 0; j < cc->nr_threads; j++) {
206         obj = sc->threads + j * size;
207
208         spapr_cpu_core_realize_child(obj, &local_err);
209         if (local_err) {
210             goto err;
211         }
212     }
213     return;
214
215 err:
216     while (--i >= 0) {
217         obj = sc->threads + i * size;
218         object_unparent(obj);
219     }
220     g_free(sc->threads);
221     error_propagate(errp, local_err);
222 }
223
224 static const char *spapr_core_models[] = {
225     /* 970 */
226     "970_v2.2",
227
228     /* 970MP variants */
229     "970MP_v1.0",
230     "970mp_v1.0",
231     "970MP_v1.1",
232     "970mp_v1.1",
233
234     /* POWER5+ */
235     "POWER5+_v2.1",
236
237     /* POWER7 */
238     "POWER7_v2.3",
239
240     /* POWER7+ */
241     "POWER7+_v2.1",
242
243     /* POWER8 */
244     "POWER8_v2.0",
245
246     /* POWER8E */
247     "POWER8E_v2.1",
248
249     /* POWER8NVL */
250     "POWER8NVL_v1.0",
251
252     /* POWER9 */
253     "POWER9_v1.0",
254 };
255
256 static Property spapr_cpu_core_properties[] = {
257     DEFINE_PROP_INT32("node-id", sPAPRCPUCore, node_id, CPU_UNSET_NUMA_NODE_ID),
258     DEFINE_PROP_END_OF_LIST()
259 };
260
261 void spapr_cpu_core_class_init(ObjectClass *oc, void *data)
262 {
263     DeviceClass *dc = DEVICE_CLASS(oc);
264     sPAPRCPUCoreClass *scc = SPAPR_CPU_CORE_CLASS(oc);
265
266     dc->realize = spapr_cpu_core_realize;
267     dc->unrealize = spapr_cpu_core_unrealizefn;
268     dc->props = spapr_cpu_core_properties;
269     scc->cpu_class = cpu_class_by_name(TYPE_POWERPC_CPU, data);
270     g_assert(scc->cpu_class);
271 }
272
273 static const TypeInfo spapr_cpu_core_type_info = {
274     .name = TYPE_SPAPR_CPU_CORE,
275     .parent = TYPE_CPU_CORE,
276     .abstract = true,
277     .instance_size = sizeof(sPAPRCPUCore),
278     .class_size = sizeof(sPAPRCPUCoreClass),
279 };
280
281 static void spapr_cpu_core_register_types(void)
282 {
283     int i;
284
285     type_register_static(&spapr_cpu_core_type_info);
286
287     for (i = 0; i < ARRAY_SIZE(spapr_core_models); i++) {
288         TypeInfo type_info = {
289             .parent = TYPE_SPAPR_CPU_CORE,
290             .instance_size = sizeof(sPAPRCPUCore),
291             .class_init = spapr_cpu_core_class_init,
292             .class_data = (void *) spapr_core_models[i],
293         };
294
295         type_info.name = g_strdup_printf("%s-" TYPE_SPAPR_CPU_CORE,
296                                          spapr_core_models[i]);
297         type_register(&type_info);
298         g_free((void *)type_info.name);
299     }
300 }
301
302 type_init(spapr_cpu_core_register_types)
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