1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 *
4 * Copyright IBM Corp. 2008
5 *
6 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
7 */
8
9 #ifndef __POWERPC_KVM_PPC_H__
10 #define __POWERPC_KVM_PPC_H__
11
12 /* This file exists just so we can dereference kvm_vcpu, avoiding nested header
13 * dependencies. */
14
15 #include <linux/mutex.h>
16 #include <linux/timer.h>
17 #include <linux/types.h>
18 #include <linux/kvm_types.h>
19 #include <linux/kvm_host.h>
20 #include <linux/bug.h>
21 #ifdef CONFIG_PPC_BOOK3S
22 #include <asm/kvm_book3s.h>
23 #else
24 #include <asm/kvm_booke.h>
25 #endif
26 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
27 #include <asm/paca.h>
28 #include <asm/xive.h>
29 #include <asm/cpu_has_feature.h>
30 #endif
31
32 /*
33 * KVMPPC_INST_SW_BREAKPOINT is debug Instruction
34 * for supporting software breakpoint.
35 */
36 #define KVMPPC_INST_SW_BREAKPOINT 0x00dddd00
37
38 enum emulation_result {
39 EMULATE_DONE, /* no further processing */
40 EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
41 EMULATE_FAIL, /* can't emulate this instruction */
42 EMULATE_AGAIN, /* something went wrong. go again */
43 EMULATE_EXIT_USER, /* emulation requires exit to user-space */
44 };
45
46 enum instruction_fetch_type {
47 INST_GENERIC,
48 INST_SC, /* system call */
49 };
50
51 enum xlate_instdata {
52 XLATE_INST, /* translate instruction address */
53 XLATE_DATA /* translate data address */
54 };
55
56 enum xlate_readwrite {
57 XLATE_READ, /* check for read permissions */
58 XLATE_WRITE /* check for write permissions */
59 };
60
61 extern int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
62 extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
63 extern void kvmppc_handler_highmem(void);
64
65 extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
66 extern int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
67 unsigned int rt, unsigned int bytes,
68 int is_default_endian);
69 extern int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
70 unsigned int rt, unsigned int bytes,
71 int is_default_endian);
72 extern int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
73 unsigned int rt, unsigned int bytes,
74 int is_default_endian, int mmio_sign_extend);
75 extern int kvmppc_handle_vmx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
76 unsigned int rt, unsigned int bytes, int is_default_endian);
77 extern int kvmppc_handle_vmx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
78 unsigned int rs, unsigned int bytes, int is_default_endian);
79 extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
80 u64 val, unsigned int bytes,
81 int is_default_endian);
82 extern int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
83 int rs, unsigned int bytes,
84 int is_default_endian);
85
86 extern int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
87 enum instruction_fetch_type type, u32 *inst);
88
89 extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
90 bool data);
91 extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
92 bool data);
93 extern int kvmppc_emulate_instruction(struct kvm_run *run,
94 struct kvm_vcpu *vcpu);
95 extern int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu);
96 extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
97 extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu);
98 extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb);
99 extern void kvmppc_decrementer_func(struct kvm_vcpu *vcpu);
100 extern int kvmppc_sanity_check(struct kvm_vcpu *vcpu);
101 extern int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu);
102 extern void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu);
103
104 /* Core-specific hooks */
105
106 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
107 unsigned int gtlb_idx);
108 extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
109 extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
110 extern void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu);
111 extern int kvmppc_mmu_init(struct kvm_vcpu *vcpu);
112 extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
113 extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
114 extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
115 gva_t eaddr);
116 extern void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu);
117 extern void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu);
118 extern int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr,
119 enum xlate_instdata xlid, enum xlate_readwrite xlrw,
120 struct kvmppc_pte *pte);
121
122 extern struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm,
123 unsigned int id);
124 extern void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu);
125 extern int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu);
126 extern int kvmppc_core_check_processor_compat(void);
127 extern int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
128 struct kvm_translation *tr);
129
130 extern void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
131 extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
132
133 extern int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu);
134 extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
135 extern void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu, ulong flags);
136 extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags);
137 extern void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu);
138 extern void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu);
139 extern void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu);
140 extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
141 extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu);
142 extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
143 struct kvm_interrupt *irq);
144 extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu);
145 extern void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, ulong dear_flags,
146 ulong esr_flags);
147 extern void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
148 ulong dear_flags,
149 ulong esr_flags);
150 extern void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu);
151 extern void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
152 ulong esr_flags);
153 extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu);
154 extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu);
155
156 extern int kvmppc_booke_init(void);
157 extern void kvmppc_booke_exit(void);
158
159 extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
160 extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
161 extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
162
163 extern int kvmppc_allocate_hpt(struct kvm_hpt_info *info, u32 order);
164 extern void kvmppc_set_hpt(struct kvm *kvm, struct kvm_hpt_info *info);
165 extern long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order);
166 extern void kvmppc_free_hpt(struct kvm_hpt_info *info);
167 extern void kvmppc_rmap_reset(struct kvm *kvm);
168 extern long kvmppc_prepare_vrma(struct kvm *kvm,
169 struct kvm_userspace_memory_region *mem);
170 extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu,
171 struct kvm_memory_slot *memslot, unsigned long porder);
172 extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);
173 extern long kvm_spapr_tce_attach_iommu_group(struct kvm *kvm, int tablefd,
174 struct iommu_group *grp);
175 extern void kvm_spapr_tce_release_iommu_group(struct kvm *kvm,
176 struct iommu_group *grp);
177 extern int kvmppc_switch_mmu_to_hpt(struct kvm *kvm);
178 extern int kvmppc_switch_mmu_to_radix(struct kvm *kvm);
179 extern void kvmppc_setup_partition_table(struct kvm *kvm);
180
181 extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
182 struct kvm_create_spapr_tce_64 *args);
183 extern struct kvmppc_spapr_tce_table *kvmppc_find_table(
184 struct kvm *kvm, unsigned long liobn);
185 #define kvmppc_ioba_validate(stt, ioba, npages) \
186 (iommu_tce_check_ioba((stt)->page_shift, (stt)->offset, \
187 (stt)->size, (ioba), (npages)) ? \
188 H_PARAMETER : H_SUCCESS)
189 extern long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
190 unsigned long ioba, unsigned long tce);
191 extern long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
192 unsigned long liobn, unsigned long ioba,
193 unsigned long tce_list, unsigned long npages);
194 extern long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
195 unsigned long liobn, unsigned long ioba,
196 unsigned long tce_value, unsigned long npages);
197 extern long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
198 unsigned long ioba);
199 extern struct page *kvm_alloc_hpt_cma(unsigned long nr_pages);
200 extern void kvm_free_hpt_cma(struct page *page, unsigned long nr_pages);
201 extern int kvmppc_core_init_vm(struct kvm *kvm);
202 extern void kvmppc_core_destroy_vm(struct kvm *kvm);
203 extern void kvmppc_core_free_memslot(struct kvm *kvm,
204 struct kvm_memory_slot *free,
205 struct kvm_memory_slot *dont);
206 extern int kvmppc_core_create_memslot(struct kvm *kvm,
207 struct kvm_memory_slot *slot,
208 unsigned long npages);
209 extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
210 struct kvm_memory_slot *memslot,
211 const struct kvm_userspace_memory_region *mem);
212 extern void kvmppc_core_commit_memory_region(struct kvm *kvm,
213 const struct kvm_userspace_memory_region *mem,
214 const struct kvm_memory_slot *old,
215 const struct kvm_memory_slot *new,
216 enum kvm_mr_change change);
217 extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm,
218 struct kvm_ppc_smmu_info *info);
219 extern void kvmppc_core_flush_memslot(struct kvm *kvm,
220 struct kvm_memory_slot *memslot);
221
222 extern int kvmppc_bookehv_init(void);
223 extern void kvmppc_bookehv_exit(void);
224
225 extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu);
226
227 extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *);
228 extern long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
229 struct kvm_ppc_resize_hpt *rhpt);
230 extern long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
231 struct kvm_ppc_resize_hpt *rhpt);
232
233 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
234
235 extern int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp);
236 extern int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu);
237 extern void kvmppc_rtas_tokens_free(struct kvm *kvm);
238
239 extern int kvmppc_xics_set_xive(struct kvm *kvm, u32 irq, u32 server,
240 u32 priority);
241 extern int kvmppc_xics_get_xive(struct kvm *kvm, u32 irq, u32 *server,
242 u32 *priority);
243 extern int kvmppc_xics_int_on(struct kvm *kvm, u32 irq);
244 extern int kvmppc_xics_int_off(struct kvm *kvm, u32 irq);
245
246 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu);
247 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu);
248
249 union kvmppc_one_reg {
250 u32 wval;
251 u64 dval;
252 vector128 vval;
253 u64 vsxval[2];
254 u32 vsx32val[4];
255 u16 vsx16val[8];
256 u8 vsx8val[16];
257 struct {
258 u64 addr;
259 u64 length;
260 } vpaval;
261 u64 xive_timaval[2];
262 };
263
264 struct kvmppc_ops {
265 struct module *owner;
266 int (*get_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
267 int (*set_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
268 int (*get_one_reg)(struct kvm_vcpu *vcpu, u64 id,
269 union kvmppc_one_reg *val);
270 int (*set_one_reg)(struct kvm_vcpu *vcpu, u64 id,
271 union kvmppc_one_reg *val);
272 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
273 void (*vcpu_put)(struct kvm_vcpu *vcpu);
274 void (*set_msr)(struct kvm_vcpu *vcpu, u64 msr);
275 int (*vcpu_run)(struct kvm_run *run, struct kvm_vcpu *vcpu);
276 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned int id);
277 void (*vcpu_free)(struct kvm_vcpu *vcpu);
278 int (*check_requests)(struct kvm_vcpu *vcpu);
279 int (*get_dirty_log)(struct kvm *kvm, struct kvm_dirty_log *log);
280 void (*flush_memslot)(struct kvm *kvm, struct kvm_memory_slot *memslot);
281 int (*prepare_memory_region)(struct kvm *kvm,
282 struct kvm_memory_slot *memslot,
283 const struct kvm_userspace_memory_region *mem);
284 void (*commit_memory_region)(struct kvm *kvm,
285 const struct kvm_userspace_memory_region *mem,
286 const struct kvm_memory_slot *old,
287 const struct kvm_memory_slot *new,
288 enum kvm_mr_change change);
289 int (*unmap_hva_range)(struct kvm *kvm, unsigned long start,
290 unsigned long end);
291 int (*age_hva)(struct kvm *kvm, unsigned long start, unsigned long end);
292 int (*test_age_hva)(struct kvm *kvm, unsigned long hva);
293 void (*set_spte_hva)(struct kvm *kvm, unsigned long hva, pte_t pte);
294 void (*mmu_destroy)(struct kvm_vcpu *vcpu);
295 void (*free_memslot)(struct kvm_memory_slot *free,
296 struct kvm_memory_slot *dont);
297 int (*create_memslot)(struct kvm_memory_slot *slot,
298 unsigned long npages);
299 int (*init_vm)(struct kvm *kvm);
300 void (*destroy_vm)(struct kvm *kvm);
301 int (*get_smmu_info)(struct kvm *kvm, struct kvm_ppc_smmu_info *info);
302 int (*emulate_op)(struct kvm_run *run, struct kvm_vcpu *vcpu,
303 unsigned int inst, int *advance);
304 int (*emulate_mtspr)(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
305 int (*emulate_mfspr)(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
306 void (*fast_vcpu_kick)(struct kvm_vcpu *vcpu);
307 long (*arch_vm_ioctl)(struct file *filp, unsigned int ioctl,
308 unsigned long arg);
309 int (*hcall_implemented)(unsigned long hcall);
310 int (*irq_bypass_add_producer)(struct irq_bypass_consumer *,
311 struct irq_bypass_producer *);
312 void (*irq_bypass_del_producer)(struct irq_bypass_consumer *,
313 struct irq_bypass_producer *);
314 int (*configure_mmu)(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg);
315 int (*get_rmmu_info)(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
316 int (*set_smt_mode)(struct kvm *kvm, unsigned long mode,
317 unsigned long flags);
318 void (*giveup_ext)(struct kvm_vcpu *vcpu, ulong msr);
319 int (*enable_nested)(struct kvm *kvm);
320 int (*load_from_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
321 int size);
322 int (*store_to_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
323 int size);
324 };
325
326 extern struct kvmppc_ops *kvmppc_hv_ops;
327 extern struct kvmppc_ops *kvmppc_pr_ops;
328
kvmppc_get_last_inst(struct kvm_vcpu * vcpu,enum instruction_fetch_type type,u32 * inst)329 static inline int kvmppc_get_last_inst(struct kvm_vcpu *vcpu,
330 enum instruction_fetch_type type, u32 *inst)
331 {
332 int ret = EMULATE_DONE;
333 u32 fetched_inst;
334
335 /* Load the instruction manually if it failed to do so in the
336 * exit path */
337 if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
338 ret = kvmppc_load_last_inst(vcpu, type, &vcpu->arch.last_inst);
339
340 /* Write fetch_failed unswapped if the fetch failed */
341 if (ret == EMULATE_DONE)
342 fetched_inst = kvmppc_need_byteswap(vcpu) ?
343 swab32(vcpu->arch.last_inst) :
344 vcpu->arch.last_inst;
345 else
346 fetched_inst = vcpu->arch.last_inst;
347
348 *inst = fetched_inst;
349 return ret;
350 }
351
is_kvmppc_hv_enabled(struct kvm * kvm)352 static inline bool is_kvmppc_hv_enabled(struct kvm *kvm)
353 {
354 return kvm->arch.kvm_ops == kvmppc_hv_ops;
355 }
356
357 extern int kvmppc_hwrng_present(void);
358
359 /*
360 * Cuts out inst bits with ordering according to spec.
361 * That means the leftmost bit is zero. All given bits are included.
362 */
kvmppc_get_field(u64 inst,int msb,int lsb)363 static inline u32 kvmppc_get_field(u64 inst, int msb, int lsb)
364 {
365 u32 r;
366 u32 mask;
367
368 BUG_ON(msb > lsb);
369
370 mask = (1 << (lsb - msb + 1)) - 1;
371 r = (inst >> (63 - lsb)) & mask;
372
373 return r;
374 }
375
376 /*
377 * Replaces inst bits with ordering according to spec.
378 */
kvmppc_set_field(u64 inst,int msb,int lsb,int value)379 static inline u32 kvmppc_set_field(u64 inst, int msb, int lsb, int value)
380 {
381 u32 r;
382 u32 mask;
383
384 BUG_ON(msb > lsb);
385
386 mask = ((1 << (lsb - msb + 1)) - 1) << (63 - lsb);
387 r = (inst & ~mask) | ((value << (63 - lsb)) & mask);
388
389 return r;
390 }
391
392 #define one_reg_size(id) \
393 (1ul << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
394
395 #define get_reg_val(id, reg) ({ \
396 union kvmppc_one_reg __u; \
397 switch (one_reg_size(id)) { \
398 case 4: __u.wval = (reg); break; \
399 case 8: __u.dval = (reg); break; \
400 default: BUG(); \
401 } \
402 __u; \
403 })
404
405
406 #define set_reg_val(id, val) ({ \
407 u64 __v; \
408 switch (one_reg_size(id)) { \
409 case 4: __v = (val).wval; break; \
410 case 8: __v = (val).dval; break; \
411 default: BUG(); \
412 } \
413 __v; \
414 })
415
416 int kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
417 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
418
419 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
420 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
421
422 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
423 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
424 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
425 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
426
427 void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid);
428
429 struct openpic;
430
431 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
432 extern void kvm_cma_reserve(void) __init;
kvmppc_set_xics_phys(int cpu,unsigned long addr)433 static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
434 {
435 paca_ptrs[cpu]->kvm_hstate.xics_phys = (void __iomem *)addr;
436 }
437
kvmppc_set_xive_tima(int cpu,unsigned long phys_addr,void __iomem * virt_addr)438 static inline void kvmppc_set_xive_tima(int cpu,
439 unsigned long phys_addr,
440 void __iomem *virt_addr)
441 {
442 paca_ptrs[cpu]->kvm_hstate.xive_tima_phys = (void __iomem *)phys_addr;
443 paca_ptrs[cpu]->kvm_hstate.xive_tima_virt = virt_addr;
444 }
445
kvmppc_get_xics_latch(void)446 static inline u32 kvmppc_get_xics_latch(void)
447 {
448 u32 xirr;
449
450 xirr = get_paca()->kvm_hstate.saved_xirr;
451 get_paca()->kvm_hstate.saved_xirr = 0;
452 return xirr;
453 }
454
455 /*
456 * To avoid the need to unnecessarily exit fully to the host kernel, an IPI to
457 * a CPU thread that's running/napping inside of a guest is by default regarded
458 * as a request to wake the CPU (if needed) and continue execution within the
459 * guest, potentially to process new state like externally-generated
460 * interrupts or IPIs sent from within the guest itself (e.g. H_PROD/H_IPI).
461 *
462 * To force an exit to the host kernel, kvmppc_set_host_ipi() must be called
463 * prior to issuing the IPI to set the corresponding 'host_ipi' flag in the
464 * target CPU's PACA. To avoid unnecessary exits to the host, this flag should
465 * be immediately cleared via kvmppc_clear_host_ipi() by the IPI handler on
466 * the receiving side prior to processing the IPI work.
467 *
468 * NOTE:
469 *
470 * We currently issue an smp_mb() at the beginning of kvmppc_set_host_ipi().
471 * This is to guard against sequences such as the following:
472 *
473 * CPU
474 * X: smp_muxed_ipi_set_message():
475 * X: smp_mb()
476 * X: message[RESCHEDULE] = 1
477 * X: doorbell_global_ipi(42):
478 * X: kvmppc_set_host_ipi(42)
479 * X: ppc_msgsnd_sync()/smp_mb()
480 * X: ppc_msgsnd() -> 42
481 * 42: doorbell_exception(): // from CPU X
482 * 42: ppc_msgsync()
483 * 105: smp_muxed_ipi_set_message():
484 * 105: smb_mb()
485 * // STORE DEFERRED DUE TO RE-ORDERING
486 * --105: message[CALL_FUNCTION] = 1
487 * | 105: doorbell_global_ipi(42):
488 * | 105: kvmppc_set_host_ipi(42)
489 * | 42: kvmppc_clear_host_ipi(42)
490 * | 42: smp_ipi_demux_relaxed()
491 * | 42: // returns to executing guest
492 * | // RE-ORDERED STORE COMPLETES
493 * ->105: message[CALL_FUNCTION] = 1
494 * 105: ppc_msgsnd_sync()/smp_mb()
495 * 105: ppc_msgsnd() -> 42
496 * 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored
497 * 105: // hangs waiting on 42 to process messages/call_single_queue
498 *
499 * We also issue an smp_mb() at the end of kvmppc_clear_host_ipi(). This is
500 * to guard against sequences such as the following (as well as to create
501 * a read-side pairing with the barrier in kvmppc_set_host_ipi()):
502 *
503 * CPU
504 * X: smp_muxed_ipi_set_message():
505 * X: smp_mb()
506 * X: message[RESCHEDULE] = 1
507 * X: doorbell_global_ipi(42):
508 * X: kvmppc_set_host_ipi(42)
509 * X: ppc_msgsnd_sync()/smp_mb()
510 * X: ppc_msgsnd() -> 42
511 * 42: doorbell_exception(): // from CPU X
512 * 42: ppc_msgsync()
513 * // STORE DEFERRED DUE TO RE-ORDERING
514 * -- 42: kvmppc_clear_host_ipi(42)
515 * | 42: smp_ipi_demux_relaxed()
516 * | 105: smp_muxed_ipi_set_message():
517 * | 105: smb_mb()
518 * | 105: message[CALL_FUNCTION] = 1
519 * | 105: doorbell_global_ipi(42):
520 * | 105: kvmppc_set_host_ipi(42)
521 * | // RE-ORDERED STORE COMPLETES
522 * -> 42: kvmppc_clear_host_ipi(42)
523 * 42: // returns to executing guest
524 * 105: ppc_msgsnd_sync()/smp_mb()
525 * 105: ppc_msgsnd() -> 42
526 * 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored
527 * 105: // hangs waiting on 42 to process messages/call_single_queue
528 */
kvmppc_set_host_ipi(int cpu)529 static inline void kvmppc_set_host_ipi(int cpu)
530 {
531 /*
532 * order stores of IPI messages vs. setting of host_ipi flag
533 *
534 * pairs with the barrier in kvmppc_clear_host_ipi()
535 */
536 smp_mb();
537 paca_ptrs[cpu]->kvm_hstate.host_ipi = 1;
538 }
539
kvmppc_clear_host_ipi(int cpu)540 static inline void kvmppc_clear_host_ipi(int cpu)
541 {
542 paca_ptrs[cpu]->kvm_hstate.host_ipi = 0;
543 /*
544 * order clearing of host_ipi flag vs. processing of IPI messages
545 *
546 * pairs with the barrier in kvmppc_set_host_ipi()
547 */
548 smp_mb();
549 }
550
kvmppc_fast_vcpu_kick(struct kvm_vcpu * vcpu)551 static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
552 {
553 vcpu->kvm->arch.kvm_ops->fast_vcpu_kick(vcpu);
554 }
555
556 extern void kvm_hv_vm_activated(void);
557 extern void kvm_hv_vm_deactivated(void);
558 extern bool kvm_hv_mode_active(void);
559
560 extern void kvmppc_check_need_tlb_flush(struct kvm *kvm, int pcpu,
561 struct kvm_nested_guest *nested);
562
563 #else
kvm_cma_reserve(void)564 static inline void __init kvm_cma_reserve(void)
565 {}
566
kvmppc_set_xics_phys(int cpu,unsigned long addr)567 static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
568 {}
569
kvmppc_set_xive_tima(int cpu,unsigned long phys_addr,void __iomem * virt_addr)570 static inline void kvmppc_set_xive_tima(int cpu,
571 unsigned long phys_addr,
572 void __iomem *virt_addr)
573 {}
574
kvmppc_get_xics_latch(void)575 static inline u32 kvmppc_get_xics_latch(void)
576 {
577 return 0;
578 }
579
kvmppc_set_host_ipi(int cpu)580 static inline void kvmppc_set_host_ipi(int cpu)
581 {}
582
kvmppc_clear_host_ipi(int cpu)583 static inline void kvmppc_clear_host_ipi(int cpu)
584 {}
585
kvmppc_fast_vcpu_kick(struct kvm_vcpu * vcpu)586 static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
587 {
588 kvm_vcpu_kick(vcpu);
589 }
590
kvm_hv_mode_active(void)591 static inline bool kvm_hv_mode_active(void) { return false; }
592
593 #endif
594
595 #ifdef CONFIG_KVM_XICS
kvmppc_xics_enabled(struct kvm_vcpu * vcpu)596 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
597 {
598 return vcpu->arch.irq_type == KVMPPC_IRQ_XICS;
599 }
600
kvmppc_get_passthru_irqmap(struct kvm * kvm)601 static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
602 struct kvm *kvm)
603 {
604 if (kvm && kvm_irq_bypass)
605 return kvm->arch.pimap;
606 return NULL;
607 }
608
609 extern void kvmppc_alloc_host_rm_ops(void);
610 extern void kvmppc_free_host_rm_ops(void);
611 extern void kvmppc_free_pimap(struct kvm *kvm);
612 extern int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall);
613 extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
614 extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd);
615 extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu);
616 extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
617 extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev,
618 struct kvm_vcpu *vcpu, u32 cpu);
619 extern void kvmppc_xics_ipi_action(void);
620 extern void kvmppc_xics_set_mapped(struct kvm *kvm, unsigned long guest_irq,
621 unsigned long host_irq);
622 extern void kvmppc_xics_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
623 unsigned long host_irq);
624 extern long kvmppc_deliver_irq_passthru(struct kvm_vcpu *vcpu, __be32 xirr,
625 struct kvmppc_irq_map *irq_map,
626 struct kvmppc_passthru_irqmap *pimap,
627 bool *again);
628
629 extern int kvmppc_xics_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
630 int level, bool line_status);
631
632 extern int h_ipi_redirect;
633 #else
kvmppc_get_passthru_irqmap(struct kvm * kvm)634 static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
635 struct kvm *kvm)
636 { return NULL; }
kvmppc_alloc_host_rm_ops(void)637 static inline void kvmppc_alloc_host_rm_ops(void) {};
kvmppc_free_host_rm_ops(void)638 static inline void kvmppc_free_host_rm_ops(void) {};
kvmppc_free_pimap(struct kvm * kvm)639 static inline void kvmppc_free_pimap(struct kvm *kvm) {};
kvmppc_xics_rm_complete(struct kvm_vcpu * vcpu,u32 hcall)640 static inline int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
641 { return 0; }
kvmppc_xics_enabled(struct kvm_vcpu * vcpu)642 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
643 { return 0; }
kvmppc_xics_free_icp(struct kvm_vcpu * vcpu)644 static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }
kvmppc_xics_hcall(struct kvm_vcpu * vcpu,u32 cmd)645 static inline int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
646 { return 0; }
647 #endif
648
649 #ifdef CONFIG_KVM_XIVE
650 /*
651 * Below the first "xive" is the "eXternal Interrupt Virtualization Engine"
652 * ie. P9 new interrupt controller, while the second "xive" is the legacy
653 * "eXternal Interrupt Vector Entry" which is the configuration of an
654 * interrupt on the "xics" interrupt controller on P8 and earlier. Those
655 * two function consume or produce a legacy "XIVE" state from the
656 * new "XIVE" interrupt controller.
657 */
658 extern int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 server,
659 u32 priority);
660 extern int kvmppc_xive_get_xive(struct kvm *kvm, u32 irq, u32 *server,
661 u32 *priority);
662 extern int kvmppc_xive_int_on(struct kvm *kvm, u32 irq);
663 extern int kvmppc_xive_int_off(struct kvm *kvm, u32 irq);
664 extern void kvmppc_xive_init_module(void);
665 extern void kvmppc_xive_exit_module(void);
666
667 extern int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
668 struct kvm_vcpu *vcpu, u32 cpu);
669 extern void kvmppc_xive_cleanup_vcpu(struct kvm_vcpu *vcpu);
670 extern int kvmppc_xive_set_mapped(struct kvm *kvm, unsigned long guest_irq,
671 struct irq_desc *host_desc);
672 extern int kvmppc_xive_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
673 struct irq_desc *host_desc);
674 extern u64 kvmppc_xive_get_icp(struct kvm_vcpu *vcpu);
675 extern int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
676
677 extern int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
678 int level, bool line_status);
679 extern void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu);
680
kvmppc_xive_enabled(struct kvm_vcpu * vcpu)681 static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
682 {
683 return vcpu->arch.irq_type == KVMPPC_IRQ_XIVE;
684 }
685
686 extern int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
687 struct kvm_vcpu *vcpu, u32 cpu);
688 extern void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu);
689 extern void kvmppc_xive_native_init_module(void);
690 extern void kvmppc_xive_native_exit_module(void);
691 extern int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu,
692 union kvmppc_one_reg *val);
693 extern int kvmppc_xive_native_set_vp(struct kvm_vcpu *vcpu,
694 union kvmppc_one_reg *val);
695 extern bool kvmppc_xive_native_supported(void);
696
697 #else
kvmppc_xive_set_xive(struct kvm * kvm,u32 irq,u32 server,u32 priority)698 static inline int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 server,
699 u32 priority) { return -1; }
kvmppc_xive_get_xive(struct kvm * kvm,u32 irq,u32 * server,u32 * priority)700 static inline int kvmppc_xive_get_xive(struct kvm *kvm, u32 irq, u32 *server,
701 u32 *priority) { return -1; }
kvmppc_xive_int_on(struct kvm * kvm,u32 irq)702 static inline int kvmppc_xive_int_on(struct kvm *kvm, u32 irq) { return -1; }
kvmppc_xive_int_off(struct kvm * kvm,u32 irq)703 static inline int kvmppc_xive_int_off(struct kvm *kvm, u32 irq) { return -1; }
kvmppc_xive_init_module(void)704 static inline void kvmppc_xive_init_module(void) { }
kvmppc_xive_exit_module(void)705 static inline void kvmppc_xive_exit_module(void) { }
706
kvmppc_xive_connect_vcpu(struct kvm_device * dev,struct kvm_vcpu * vcpu,u32 cpu)707 static inline int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
708 struct kvm_vcpu *vcpu, u32 cpu) { return -EBUSY; }
kvmppc_xive_cleanup_vcpu(struct kvm_vcpu * vcpu)709 static inline void kvmppc_xive_cleanup_vcpu(struct kvm_vcpu *vcpu) { }
kvmppc_xive_set_mapped(struct kvm * kvm,unsigned long guest_irq,struct irq_desc * host_desc)710 static inline int kvmppc_xive_set_mapped(struct kvm *kvm, unsigned long guest_irq,
711 struct irq_desc *host_desc) { return -ENODEV; }
kvmppc_xive_clr_mapped(struct kvm * kvm,unsigned long guest_irq,struct irq_desc * host_desc)712 static inline int kvmppc_xive_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
713 struct irq_desc *host_desc) { return -ENODEV; }
kvmppc_xive_get_icp(struct kvm_vcpu * vcpu)714 static inline u64 kvmppc_xive_get_icp(struct kvm_vcpu *vcpu) { return 0; }
kvmppc_xive_set_icp(struct kvm_vcpu * vcpu,u64 icpval)715 static inline int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval) { return -ENOENT; }
716
kvmppc_xive_set_irq(struct kvm * kvm,int irq_source_id,u32 irq,int level,bool line_status)717 static inline int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
718 int level, bool line_status) { return -ENODEV; }
kvmppc_xive_push_vcpu(struct kvm_vcpu * vcpu)719 static inline void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu) { }
720
kvmppc_xive_enabled(struct kvm_vcpu * vcpu)721 static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
722 { return 0; }
kvmppc_xive_native_connect_vcpu(struct kvm_device * dev,struct kvm_vcpu * vcpu,u32 cpu)723 static inline int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
724 struct kvm_vcpu *vcpu, u32 cpu) { return -EBUSY; }
kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu * vcpu)725 static inline void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu) { }
kvmppc_xive_native_init_module(void)726 static inline void kvmppc_xive_native_init_module(void) { }
kvmppc_xive_native_exit_module(void)727 static inline void kvmppc_xive_native_exit_module(void) { }
kvmppc_xive_native_get_vp(struct kvm_vcpu * vcpu,union kvmppc_one_reg * val)728 static inline int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu,
729 union kvmppc_one_reg *val)
730 { return 0; }
kvmppc_xive_native_set_vp(struct kvm_vcpu * vcpu,union kvmppc_one_reg * val)731 static inline int kvmppc_xive_native_set_vp(struct kvm_vcpu *vcpu,
732 union kvmppc_one_reg *val)
733 { return -ENOENT; }
734
735 #endif /* CONFIG_KVM_XIVE */
736
737 #if defined(CONFIG_PPC_POWERNV) && defined(CONFIG_KVM_BOOK3S_64_HANDLER)
xics_on_xive(void)738 static inline bool xics_on_xive(void)
739 {
740 return xive_enabled() && cpu_has_feature(CPU_FTR_HVMODE);
741 }
742 #else
xics_on_xive(void)743 static inline bool xics_on_xive(void)
744 {
745 return false;
746 }
747 #endif
748
749 /*
750 * Prototypes for functions called only from assembler code.
751 * Having prototypes reduces sparse errors.
752 */
753 long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
754 unsigned long ioba, unsigned long tce);
755 long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
756 unsigned long liobn, unsigned long ioba,
757 unsigned long tce_list, unsigned long npages);
758 long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
759 unsigned long liobn, unsigned long ioba,
760 unsigned long tce_value, unsigned long npages);
761 long int kvmppc_rm_h_confer(struct kvm_vcpu *vcpu, int target,
762 unsigned int yield_count);
763 long kvmppc_h_random(struct kvm_vcpu *vcpu);
764 void kvmhv_commence_exit(int trap);
765 void kvmppc_realmode_machine_check(struct kvm_vcpu *vcpu);
766 void kvmppc_subcore_enter_guest(void);
767 void kvmppc_subcore_exit_guest(void);
768 long kvmppc_realmode_hmi_handler(void);
769 long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
770 long pte_index, unsigned long pteh, unsigned long ptel);
771 long kvmppc_h_remove(struct kvm_vcpu *vcpu, unsigned long flags,
772 unsigned long pte_index, unsigned long avpn);
773 long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu);
774 long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
775 unsigned long pte_index, unsigned long avpn,
776 unsigned long va);
777 long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags,
778 unsigned long pte_index);
779 long kvmppc_h_clear_ref(struct kvm_vcpu *vcpu, unsigned long flags,
780 unsigned long pte_index);
781 long kvmppc_h_clear_mod(struct kvm_vcpu *vcpu, unsigned long flags,
782 unsigned long pte_index);
783 long kvmppc_rm_h_page_init(struct kvm_vcpu *vcpu, unsigned long flags,
784 unsigned long dest, unsigned long src);
785 long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr,
786 unsigned long slb_v, unsigned int status, bool data);
787 unsigned long kvmppc_rm_h_xirr(struct kvm_vcpu *vcpu);
788 unsigned long kvmppc_rm_h_xirr_x(struct kvm_vcpu *vcpu);
789 unsigned long kvmppc_rm_h_ipoll(struct kvm_vcpu *vcpu, unsigned long server);
790 int kvmppc_rm_h_ipi(struct kvm_vcpu *vcpu, unsigned long server,
791 unsigned long mfrr);
792 int kvmppc_rm_h_cppr(struct kvm_vcpu *vcpu, unsigned long cppr);
793 int kvmppc_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr);
794 void kvmppc_guest_entry_inject_int(struct kvm_vcpu *vcpu);
795
796 /*
797 * Host-side operations we want to set up while running in real
798 * mode in the guest operating on the xics.
799 * Currently only VCPU wakeup is supported.
800 */
801
802 union kvmppc_rm_state {
803 unsigned long raw;
804 struct {
805 u32 in_host;
806 u32 rm_action;
807 };
808 };
809
810 struct kvmppc_host_rm_core {
811 union kvmppc_rm_state rm_state;
812 void *rm_data;
813 char pad[112];
814 };
815
816 struct kvmppc_host_rm_ops {
817 struct kvmppc_host_rm_core *rm_core;
818 void (*vcpu_kick)(struct kvm_vcpu *vcpu);
819 };
820
821 extern struct kvmppc_host_rm_ops *kvmppc_host_rm_ops_hv;
822
kvmppc_get_epr(struct kvm_vcpu * vcpu)823 static inline unsigned long kvmppc_get_epr(struct kvm_vcpu *vcpu)
824 {
825 #ifdef CONFIG_KVM_BOOKE_HV
826 return mfspr(SPRN_GEPR);
827 #elif defined(CONFIG_BOOKE)
828 return vcpu->arch.epr;
829 #else
830 return 0;
831 #endif
832 }
833
kvmppc_set_epr(struct kvm_vcpu * vcpu,u32 epr)834 static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr)
835 {
836 #ifdef CONFIG_KVM_BOOKE_HV
837 mtspr(SPRN_GEPR, epr);
838 #elif defined(CONFIG_BOOKE)
839 vcpu->arch.epr = epr;
840 #endif
841 }
842
843 #ifdef CONFIG_KVM_MPIC
844
845 void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu);
846 int kvmppc_mpic_connect_vcpu(struct kvm_device *dev, struct kvm_vcpu *vcpu,
847 u32 cpu);
848 void kvmppc_mpic_disconnect_vcpu(struct openpic *opp, struct kvm_vcpu *vcpu);
849
850 #else
851
kvmppc_mpic_set_epr(struct kvm_vcpu * vcpu)852 static inline void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu)
853 {
854 }
855
kvmppc_mpic_connect_vcpu(struct kvm_device * dev,struct kvm_vcpu * vcpu,u32 cpu)856 static inline int kvmppc_mpic_connect_vcpu(struct kvm_device *dev,
857 struct kvm_vcpu *vcpu, u32 cpu)
858 {
859 return -EINVAL;
860 }
861
kvmppc_mpic_disconnect_vcpu(struct openpic * opp,struct kvm_vcpu * vcpu)862 static inline void kvmppc_mpic_disconnect_vcpu(struct openpic *opp,
863 struct kvm_vcpu *vcpu)
864 {
865 }
866
867 #endif /* CONFIG_KVM_MPIC */
868
869 int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
870 struct kvm_config_tlb *cfg);
871 int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
872 struct kvm_dirty_tlb *cfg);
873
874 long kvmppc_alloc_lpid(void);
875 void kvmppc_claim_lpid(long lpid);
876 void kvmppc_free_lpid(long lpid);
877 void kvmppc_init_lpid(unsigned long nr_lpids);
878
kvmppc_mmu_flush_icache(kvm_pfn_t pfn)879 static inline void kvmppc_mmu_flush_icache(kvm_pfn_t pfn)
880 {
881 struct page *page;
882 /*
883 * We can only access pages that the kernel maps
884 * as memory. Bail out for unmapped ones.
885 */
886 if (!pfn_valid(pfn))
887 return;
888
889 /* Clear i-cache for new pages */
890 page = pfn_to_page(pfn);
891 if (!test_bit(PG_arch_1, &page->flags)) {
892 flush_dcache_icache_page(page);
893 set_bit(PG_arch_1, &page->flags);
894 }
895 }
896
897 /*
898 * Shared struct helpers. The shared struct can be little or big endian,
899 * depending on the guest endianness. So expose helpers to all of them.
900 */
kvmppc_shared_big_endian(struct kvm_vcpu * vcpu)901 static inline bool kvmppc_shared_big_endian(struct kvm_vcpu *vcpu)
902 {
903 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
904 /* Only Book3S_64 PR supports bi-endian for now */
905 return vcpu->arch.shared_big_endian;
906 #elif defined(CONFIG_PPC_BOOK3S_64) && defined(__LITTLE_ENDIAN__)
907 /* Book3s_64 HV on little endian is always little endian */
908 return false;
909 #else
910 return true;
911 #endif
912 }
913
914 #define SPRNG_WRAPPER_GET(reg, bookehv_spr) \
915 static inline ulong kvmppc_get_##reg(struct kvm_vcpu *vcpu) \
916 { \
917 return mfspr(bookehv_spr); \
918 } \
919
920 #define SPRNG_WRAPPER_SET(reg, bookehv_spr) \
921 static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, ulong val) \
922 { \
923 mtspr(bookehv_spr, val); \
924 } \
925
926 #define SHARED_WRAPPER_GET(reg, size) \
927 static inline u##size kvmppc_get_##reg(struct kvm_vcpu *vcpu) \
928 { \
929 if (kvmppc_shared_big_endian(vcpu)) \
930 return be##size##_to_cpu(vcpu->arch.shared->reg); \
931 else \
932 return le##size##_to_cpu(vcpu->arch.shared->reg); \
933 } \
934
935 #define SHARED_WRAPPER_SET(reg, size) \
936 static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, u##size val) \
937 { \
938 if (kvmppc_shared_big_endian(vcpu)) \
939 vcpu->arch.shared->reg = cpu_to_be##size(val); \
940 else \
941 vcpu->arch.shared->reg = cpu_to_le##size(val); \
942 } \
943
944 #define SHARED_WRAPPER(reg, size) \
945 SHARED_WRAPPER_GET(reg, size) \
946 SHARED_WRAPPER_SET(reg, size) \
947
948 #define SPRNG_WRAPPER(reg, bookehv_spr) \
949 SPRNG_WRAPPER_GET(reg, bookehv_spr) \
950 SPRNG_WRAPPER_SET(reg, bookehv_spr) \
951
952 #ifdef CONFIG_KVM_BOOKE_HV
953
954 #define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr) \
955 SPRNG_WRAPPER(reg, bookehv_spr) \
956
957 #else
958
959 #define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr) \
960 SHARED_WRAPPER(reg, size) \
961
962 #endif
963
964 SHARED_WRAPPER(critical, 64)
965 SHARED_SPRNG_WRAPPER(sprg0, 64, SPRN_GSPRG0)
966 SHARED_SPRNG_WRAPPER(sprg1, 64, SPRN_GSPRG1)
967 SHARED_SPRNG_WRAPPER(sprg2, 64, SPRN_GSPRG2)
968 SHARED_SPRNG_WRAPPER(sprg3, 64, SPRN_GSPRG3)
969 SHARED_SPRNG_WRAPPER(srr0, 64, SPRN_GSRR0)
970 SHARED_SPRNG_WRAPPER(srr1, 64, SPRN_GSRR1)
971 SHARED_SPRNG_WRAPPER(dar, 64, SPRN_GDEAR)
972 SHARED_SPRNG_WRAPPER(esr, 64, SPRN_GESR)
973 SHARED_WRAPPER_GET(msr, 64)
kvmppc_set_msr_fast(struct kvm_vcpu * vcpu,u64 val)974 static inline void kvmppc_set_msr_fast(struct kvm_vcpu *vcpu, u64 val)
975 {
976 if (kvmppc_shared_big_endian(vcpu))
977 vcpu->arch.shared->msr = cpu_to_be64(val);
978 else
979 vcpu->arch.shared->msr = cpu_to_le64(val);
980 }
981 SHARED_WRAPPER(dsisr, 32)
982 SHARED_WRAPPER(int_pending, 32)
983 SHARED_WRAPPER(sprg4, 64)
984 SHARED_WRAPPER(sprg5, 64)
985 SHARED_WRAPPER(sprg6, 64)
986 SHARED_WRAPPER(sprg7, 64)
987
kvmppc_get_sr(struct kvm_vcpu * vcpu,int nr)988 static inline u32 kvmppc_get_sr(struct kvm_vcpu *vcpu, int nr)
989 {
990 if (kvmppc_shared_big_endian(vcpu))
991 return be32_to_cpu(vcpu->arch.shared->sr[nr]);
992 else
993 return le32_to_cpu(vcpu->arch.shared->sr[nr]);
994 }
995
kvmppc_set_sr(struct kvm_vcpu * vcpu,int nr,u32 val)996 static inline void kvmppc_set_sr(struct kvm_vcpu *vcpu, int nr, u32 val)
997 {
998 if (kvmppc_shared_big_endian(vcpu))
999 vcpu->arch.shared->sr[nr] = cpu_to_be32(val);
1000 else
1001 vcpu->arch.shared->sr[nr] = cpu_to_le32(val);
1002 }
1003
1004 /*
1005 * Please call after prepare_to_enter. This function puts the lazy ee and irq
1006 * disabled tracking state back to normal mode, without actually enabling
1007 * interrupts.
1008 */
kvmppc_fix_ee_before_entry(void)1009 static inline void kvmppc_fix_ee_before_entry(void)
1010 {
1011 trace_hardirqs_on();
1012
1013 #ifdef CONFIG_PPC64
1014 /*
1015 * To avoid races, the caller must have gone directly from having
1016 * interrupts fully-enabled to hard-disabled.
1017 */
1018 WARN_ON(local_paca->irq_happened != PACA_IRQ_HARD_DIS);
1019
1020 /* Only need to enable IRQs by hard enabling them after this */
1021 local_paca->irq_happened = 0;
1022 irq_soft_mask_set(IRQS_ENABLED);
1023 #endif
1024 }
1025
kvmppc_get_ea_indexed(struct kvm_vcpu * vcpu,int ra,int rb)1026 static inline ulong kvmppc_get_ea_indexed(struct kvm_vcpu *vcpu, int ra, int rb)
1027 {
1028 ulong ea;
1029 ulong msr_64bit = 0;
1030
1031 ea = kvmppc_get_gpr(vcpu, rb);
1032 if (ra)
1033 ea += kvmppc_get_gpr(vcpu, ra);
1034
1035 #if defined(CONFIG_PPC_BOOK3E_64)
1036 msr_64bit = MSR_CM;
1037 #elif defined(CONFIG_PPC_BOOK3S_64)
1038 msr_64bit = MSR_SF;
1039 #endif
1040
1041 if (!(kvmppc_get_msr(vcpu) & msr_64bit))
1042 ea = (uint32_t)ea;
1043
1044 return ea;
1045 }
1046
1047 extern void xics_wake_cpu(int cpu);
1048
1049 #endif /* __POWERPC_KVM_PPC_H__ */
1050
