1
2
3
4
5
6#ifndef _KVM_PPC_BOOK3S_XIVE_H
7#define _KVM_PPC_BOOK3S_XIVE_H
8
9#ifdef CONFIG_KVM_XICS
10#include "book3s_xics.h"
11
12
13
14
15
16#define KVMPPC_XIVE_FIRST_IRQ 0
17#define KVMPPC_XIVE_NR_IRQS KVMPPC_XICS_NR_IRQS
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32struct kvmppc_xive_irq_state {
33 bool valid;
34
35 u32 number;
36 u32 ipi_number;
37 struct xive_irq_data ipi_data;
38 u32 pt_number;
39 struct xive_irq_data *pt_data;
40
41
42 u8 guest_priority;
43 u8 saved_priority;
44
45
46 u32 act_server;
47 u8 act_priority;
48
49
50 bool in_eoi;
51 bool old_p;
52 bool old_q;
53 bool lsi;
54 bool asserted;
55
56
57 bool in_queue;
58 bool saved_p;
59 bool saved_q;
60 u8 saved_scan_prio;
61
62
63 u32 eisn;
64};
65
66
67static inline void kvmppc_xive_select_irq(struct kvmppc_xive_irq_state *state,
68 u32 *out_hw_irq,
69 struct xive_irq_data **out_xd)
70{
71 if (state->pt_number) {
72 if (out_hw_irq)
73 *out_hw_irq = state->pt_number;
74 if (out_xd)
75 *out_xd = state->pt_data;
76 } else {
77 if (out_hw_irq)
78 *out_hw_irq = state->ipi_number;
79 if (out_xd)
80 *out_xd = &state->ipi_data;
81 }
82}
83
84
85
86
87
88struct kvmppc_xive_src_block {
89 arch_spinlock_t lock;
90 u16 id;
91 struct kvmppc_xive_irq_state irq_state[KVMPPC_XICS_IRQ_PER_ICS];
92};
93
94struct kvmppc_xive;
95
96struct kvmppc_xive_ops {
97 int (*reset_mapped)(struct kvm *kvm, unsigned long guest_irq);
98};
99
100#define KVMPPC_XIVE_FLAG_SINGLE_ESCALATION 0x1
101#define KVMPPC_XIVE_FLAG_SAVE_RESTORE 0x2
102
103struct kvmppc_xive {
104 struct kvm *kvm;
105 struct kvm_device *dev;
106 struct dentry *dentry;
107
108
109 u32 vp_base;
110
111
112 struct kvmppc_xive_src_block *src_blocks[KVMPPC_XICS_MAX_ICS_ID + 1];
113 u32 max_sbid;
114
115
116
117
118
119
120
121
122 u32 src_count;
123 u32 saved_src_count;
124
125
126
127
128
129 u32 delayed_irqs;
130
131
132 u8 qmap;
133
134
135 u32 q_order;
136 u32 q_page_order;
137
138
139 u8 flags;
140
141
142 u32 nr_servers;
143
144 struct kvmppc_xive_ops *ops;
145 struct address_space *mapping;
146 struct mutex mapping_lock;
147 struct mutex lock;
148};
149
150#define KVMPPC_XIVE_Q_COUNT 8
151
152struct kvmppc_xive_vcpu {
153 struct kvmppc_xive *xive;
154 struct kvm_vcpu *vcpu;
155 bool valid;
156
157
158 u32 server_num;
159
160
161
162
163
164 u32 vp_id;
165 u32 vp_chip_id;
166 u32 vp_cam;
167
168
169 u32 vp_ipi;
170 struct xive_irq_data vp_ipi_data;
171
172
173 uint8_t cppr;
174 uint8_t hw_cppr;
175 uint8_t mfrr;
176 uint8_t pending;
177
178
179 struct xive_q queues[KVMPPC_XIVE_Q_COUNT];
180 u32 esc_virq[KVMPPC_XIVE_Q_COUNT];
181 char *esc_virq_names[KVMPPC_XIVE_Q_COUNT];
182
183
184 u32 delayed_irq;
185
186
187 u64 stat_rm_h_xirr;
188 u64 stat_rm_h_ipoll;
189 u64 stat_rm_h_cppr;
190 u64 stat_rm_h_eoi;
191 u64 stat_rm_h_ipi;
192 u64 stat_vm_h_xirr;
193 u64 stat_vm_h_ipoll;
194 u64 stat_vm_h_cppr;
195 u64 stat_vm_h_eoi;
196 u64 stat_vm_h_ipi;
197};
198
199static inline struct kvm_vcpu *kvmppc_xive_find_server(struct kvm *kvm, u32 nr)
200{
201 struct kvm_vcpu *vcpu = NULL;
202 int i;
203
204 kvm_for_each_vcpu(i, vcpu, kvm) {
205 if (vcpu->arch.xive_vcpu && nr == vcpu->arch.xive_vcpu->server_num)
206 return vcpu;
207 }
208 return NULL;
209}
210
211static inline struct kvmppc_xive_src_block *kvmppc_xive_find_source(struct kvmppc_xive *xive,
212 u32 irq, u16 *source)
213{
214 u32 bid = irq >> KVMPPC_XICS_ICS_SHIFT;
215 u16 src = irq & KVMPPC_XICS_SRC_MASK;
216
217 if (source)
218 *source = src;
219 if (bid > KVMPPC_XICS_MAX_ICS_ID)
220 return NULL;
221 return xive->src_blocks[bid];
222}
223
224
225
226
227
228
229
230
231
232
233
234
235static inline u32 kvmppc_xive_vp(struct kvmppc_xive *xive, u32 server)
236{
237 return xive->vp_base + kvmppc_pack_vcpu_id(xive->kvm, server);
238}
239
240static inline bool kvmppc_xive_vp_in_use(struct kvm *kvm, u32 vp_id)
241{
242 struct kvm_vcpu *vcpu = NULL;
243 int i;
244
245 kvm_for_each_vcpu(i, vcpu, kvm) {
246 if (vcpu->arch.xive_vcpu && vp_id == vcpu->arch.xive_vcpu->vp_id)
247 return true;
248 }
249 return false;
250}
251
252
253
254
255
256
257
258
259
260
261static inline u8 xive_prio_from_guest(u8 prio)
262{
263 if (prio == 0xff || prio < 6)
264 return prio;
265 return 6;
266}
267
268static inline u8 xive_prio_to_guest(u8 prio)
269{
270 return prio;
271}
272
273static inline u32 __xive_read_eq(__be32 *qpage, u32 msk, u32 *idx, u32 *toggle)
274{
275 u32 cur;
276
277 if (!qpage)
278 return 0;
279 cur = be32_to_cpup(qpage + *idx);
280 if ((cur >> 31) == *toggle)
281 return 0;
282 *idx = (*idx + 1) & msk;
283 if (*idx == 0)
284 (*toggle) ^= 1;
285 return cur & 0x7fffffff;
286}
287
288extern unsigned long xive_rm_h_xirr(struct kvm_vcpu *vcpu);
289extern unsigned long xive_rm_h_ipoll(struct kvm_vcpu *vcpu, unsigned long server);
290extern int xive_rm_h_ipi(struct kvm_vcpu *vcpu, unsigned long server,
291 unsigned long mfrr);
292extern int xive_rm_h_cppr(struct kvm_vcpu *vcpu, unsigned long cppr);
293extern int xive_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr);
294
295
296
297
298void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu);
299int kvmppc_xive_debug_show_queues(struct seq_file *m, struct kvm_vcpu *vcpu);
300void kvmppc_xive_debug_show_sources(struct seq_file *m,
301 struct kvmppc_xive_src_block *sb);
302struct kvmppc_xive_src_block *kvmppc_xive_create_src_block(
303 struct kvmppc_xive *xive, int irq);
304void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb);
305int kvmppc_xive_select_target(struct kvm *kvm, u32 *server, u8 prio);
306int kvmppc_xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio,
307 bool single_escalation);
308struct kvmppc_xive *kvmppc_xive_get_device(struct kvm *kvm, u32 type);
309void xive_cleanup_single_escalation(struct kvm_vcpu *vcpu,
310 struct kvmppc_xive_vcpu *xc, int irq);
311int kvmppc_xive_compute_vp_id(struct kvmppc_xive *xive, u32 cpu, u32 *vp);
312int kvmppc_xive_set_nr_servers(struct kvmppc_xive *xive, u64 addr);
313bool kvmppc_xive_check_save_restore(struct kvm_vcpu *vcpu);
314
315static inline bool kvmppc_xive_has_single_escalation(struct kvmppc_xive *xive)
316{
317 return xive->flags & KVMPPC_XIVE_FLAG_SINGLE_ESCALATION;
318}
319
320#endif
321#endif
322