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10#include "qemu/osdep.h"
11#include "qemu/log.h"
12#include "qemu/error-report.h"
13#include "qapi/error.h"
14#include "hw/ppc/spapr.h"
15#include "hw/ppc/xics.h"
16#include "sysemu/kvm.h"
17
18#include "trace.h"
19
20void spapr_irq_msi_init(sPAPRMachineState *spapr, uint32_t nr_msis)
21{
22 spapr->irq_map_nr = nr_msis;
23 spapr->irq_map = bitmap_new(spapr->irq_map_nr);
24}
25
26int spapr_irq_msi_alloc(sPAPRMachineState *spapr, uint32_t num, bool align,
27 Error **errp)
28{
29 int irq;
30
31
32
33
34
35
36
37 align -= 1;
38
39 irq = bitmap_find_next_zero_area(spapr->irq_map, spapr->irq_map_nr, 0, num,
40 align);
41 if (irq == spapr->irq_map_nr) {
42 error_setg(errp, "can't find a free %d-IRQ block", num);
43 return -1;
44 }
45
46 bitmap_set(spapr->irq_map, irq, num);
47
48 return irq + SPAPR_IRQ_MSI;
49}
50
51void spapr_irq_msi_free(sPAPRMachineState *spapr, int irq, uint32_t num)
52{
53 bitmap_clear(spapr->irq_map, irq - SPAPR_IRQ_MSI, num);
54}
55
56void spapr_irq_msi_reset(sPAPRMachineState *spapr)
57{
58 bitmap_clear(spapr->irq_map, 0, spapr->irq_map_nr);
59}
60
61
62
63
64
65
66static ICSState *spapr_ics_create(sPAPRMachineState *spapr,
67 const char *type_ics,
68 int nr_irqs, Error **errp)
69{
70 Error *local_err = NULL;
71 Object *obj;
72
73 obj = object_new(type_ics);
74 object_property_add_child(OBJECT(spapr), "ics", obj, &error_abort);
75 object_property_add_const_link(obj, ICS_PROP_XICS, OBJECT(spapr),
76 &error_abort);
77 object_property_set_int(obj, nr_irqs, "nr-irqs", &local_err);
78 if (local_err) {
79 goto error;
80 }
81 object_property_set_bool(obj, true, "realized", &local_err);
82 if (local_err) {
83 goto error;
84 }
85
86 return ICS_BASE(obj);
87
88error:
89 error_propagate(errp, local_err);
90 return NULL;
91}
92
93static void spapr_irq_init_xics(sPAPRMachineState *spapr, Error **errp)
94{
95 MachineState *machine = MACHINE(spapr);
96 sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
97 int nr_irqs = smc->irq->nr_irqs;
98 Error *local_err = NULL;
99
100
101 if (!SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
102 spapr_irq_msi_init(spapr, smc->irq->nr_msis);
103 }
104
105 if (kvm_enabled()) {
106 if (machine_kernel_irqchip_allowed(machine) &&
107 !xics_kvm_init(spapr, &local_err)) {
108 spapr->icp_type = TYPE_KVM_ICP;
109 spapr->ics = spapr_ics_create(spapr, TYPE_ICS_KVM, nr_irqs,
110 &local_err);
111 }
112 if (machine_kernel_irqchip_required(machine) && !spapr->ics) {
113 error_prepend(&local_err,
114 "kernel_irqchip requested but unavailable: ");
115 goto error;
116 }
117 error_free(local_err);
118 local_err = NULL;
119 }
120
121 if (!spapr->ics) {
122 xics_spapr_init(spapr);
123 spapr->icp_type = TYPE_ICP;
124 spapr->ics = spapr_ics_create(spapr, TYPE_ICS_SIMPLE, nr_irqs,
125 &local_err);
126 }
127
128error:
129 error_propagate(errp, local_err);
130}
131
132#define ICS_IRQ_FREE(ics, srcno) \
133 (!((ics)->irqs[(srcno)].flags & (XICS_FLAGS_IRQ_MASK)))
134
135static int spapr_irq_claim_xics(sPAPRMachineState *spapr, int irq, bool lsi,
136 Error **errp)
137{
138 ICSState *ics = spapr->ics;
139
140 assert(ics);
141
142 if (!ics_valid_irq(ics, irq)) {
143 error_setg(errp, "IRQ %d is invalid", irq);
144 return -1;
145 }
146
147 if (!ICS_IRQ_FREE(ics, irq - ics->offset)) {
148 error_setg(errp, "IRQ %d is not free", irq);
149 return -1;
150 }
151
152 ics_set_irq_type(ics, irq - ics->offset, lsi);
153 return 0;
154}
155
156static void spapr_irq_free_xics(sPAPRMachineState *spapr, int irq, int num)
157{
158 ICSState *ics = spapr->ics;
159 uint32_t srcno = irq - ics->offset;
160 int i;
161
162 if (ics_valid_irq(ics, irq)) {
163 trace_spapr_irq_free(0, irq, num);
164 for (i = srcno; i < srcno + num; ++i) {
165 if (ICS_IRQ_FREE(ics, i)) {
166 trace_spapr_irq_free_warn(0, i);
167 }
168 memset(&ics->irqs[i], 0, sizeof(ICSIRQState));
169 }
170 }
171}
172
173static qemu_irq spapr_qirq_xics(sPAPRMachineState *spapr, int irq)
174{
175 ICSState *ics = spapr->ics;
176 uint32_t srcno = irq - ics->offset;
177
178 if (ics_valid_irq(ics, irq)) {
179 return ics->qirqs[srcno];
180 }
181
182 return NULL;
183}
184
185static void spapr_irq_print_info_xics(sPAPRMachineState *spapr, Monitor *mon)
186{
187 CPUState *cs;
188
189 CPU_FOREACH(cs) {
190 PowerPCCPU *cpu = POWERPC_CPU(cs);
191
192 icp_pic_print_info(ICP(cpu->intc), mon);
193 }
194
195 ics_pic_print_info(spapr->ics, mon);
196}
197
198#define SPAPR_IRQ_XICS_NR_IRQS 0x1000
199#define SPAPR_IRQ_XICS_NR_MSIS \
200 (XICS_IRQ_BASE + SPAPR_IRQ_XICS_NR_IRQS - SPAPR_IRQ_MSI)
201
202sPAPRIrq spapr_irq_xics = {
203 .nr_irqs = SPAPR_IRQ_XICS_NR_IRQS,
204 .nr_msis = SPAPR_IRQ_XICS_NR_MSIS,
205
206 .init = spapr_irq_init_xics,
207 .claim = spapr_irq_claim_xics,
208 .free = spapr_irq_free_xics,
209 .qirq = spapr_qirq_xics,
210 .print_info = spapr_irq_print_info_xics,
211};
212
213
214
215
216
217int spapr_irq_claim(sPAPRMachineState *spapr, int irq, bool lsi, Error **errp)
218{
219 sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
220
221 return smc->irq->claim(spapr, irq, lsi, errp);
222}
223
224void spapr_irq_free(sPAPRMachineState *spapr, int irq, int num)
225{
226 sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
227
228 smc->irq->free(spapr, irq, num);
229}
230
231qemu_irq spapr_qirq(sPAPRMachineState *spapr, int irq)
232{
233 sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
234
235 return smc->irq->qirq(spapr, irq);
236}
237
238
239
240
241
242static int ics_find_free_block(ICSState *ics, int num, int alignnum)
243{
244 int first, i;
245
246 for (first = 0; first < ics->nr_irqs; first += alignnum) {
247 if (num > (ics->nr_irqs - first)) {
248 return -1;
249 }
250 for (i = first; i < first + num; ++i) {
251 if (!ICS_IRQ_FREE(ics, i)) {
252 break;
253 }
254 }
255 if (i == (first + num)) {
256 return first;
257 }
258 }
259
260 return -1;
261}
262
263int spapr_irq_find(sPAPRMachineState *spapr, int num, bool align, Error **errp)
264{
265 ICSState *ics = spapr->ics;
266 int first = -1;
267
268 assert(ics);
269
270
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273
274
275
276
277 if (align) {
278 assert((num == 1) || (num == 2) || (num == 4) ||
279 (num == 8) || (num == 16) || (num == 32));
280 first = ics_find_free_block(ics, num, num);
281 } else {
282 first = ics_find_free_block(ics, num, 1);
283 }
284
285 if (first < 0) {
286 error_setg(errp, "can't find a free %d-IRQ block", num);
287 return -1;
288 }
289
290 return first + ics->offset;
291}
292
293#define SPAPR_IRQ_XICS_LEGACY_NR_IRQS 0x400
294
295sPAPRIrq spapr_irq_xics_legacy = {
296 .nr_irqs = SPAPR_IRQ_XICS_LEGACY_NR_IRQS,
297 .nr_msis = SPAPR_IRQ_XICS_LEGACY_NR_IRQS,
298
299 .init = spapr_irq_init_xics,
300 .claim = spapr_irq_claim_xics,
301 .free = spapr_irq_free_xics,
302 .qirq = spapr_qirq_xics,
303 .print_info = spapr_irq_print_info_xics,
304};
305