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 #include <asm/inst.h>
32
33 /*
34 * KVMPPC_INST_SW_BREAKPOINT is debug Instruction
35 * for supporting software breakpoint.
36 */
37 #define KVMPPC_INST_SW_BREAKPOINT 0x00dddd00
38
39 enum emulation_result {
40 EMULATE_DONE, /* no further processing */
41 EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
42 EMULATE_FAIL, /* can't emulate this instruction */
43 EMULATE_AGAIN, /* something went wrong. go again */
44 EMULATE_EXIT_USER, /* emulation requires exit to user-space */
45 };
46
47 enum instruction_fetch_type {
48 INST_GENERIC,
49 INST_SC, /* system call */
50 };
51
52 enum xlate_instdata {
53 XLATE_INST, /* translate instruction address */
54 XLATE_DATA /* translate data address */
55 };
56
57 enum xlate_readwrite {
58 XLATE_READ, /* check for read permissions */
59 XLATE_WRITE /* check for write permissions */
60 };
61
62 extern int kvmppc_vcpu_run(struct kvm_vcpu *vcpu);
63 extern int __kvmppc_vcpu_run(struct kvm_vcpu *vcpu);
64 extern void kvmppc_handler_highmem(void);
65
66 extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
67 extern int kvmppc_handle_load(struct kvm_vcpu *vcpu,
68 unsigned int rt, unsigned int bytes,
69 int is_default_endian);
70 extern int kvmppc_handle_loads(struct kvm_vcpu *vcpu,
71 unsigned int rt, unsigned int bytes,
72 int is_default_endian);
73 extern int kvmppc_handle_vsx_load(struct kvm_vcpu *vcpu,
74 unsigned int rt, unsigned int bytes,
75 int is_default_endian, int mmio_sign_extend);
76 extern int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
77 unsigned int rt, unsigned int bytes, int is_default_endian);
78 extern int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
79 unsigned int rs, unsigned int bytes, int is_default_endian);
80 extern int kvmppc_handle_store(struct kvm_vcpu *vcpu,
81 u64 val, unsigned int bytes,
82 int is_default_endian);
83 extern int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu,
84 int rs, unsigned int bytes,
85 int is_default_endian);
86
87 extern int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
88 enum instruction_fetch_type type,
89 unsigned long *inst);
90
91 extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
92 bool data);
93 extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
94 bool data);
95 extern int kvmppc_emulate_instruction(struct kvm_vcpu *vcpu);
96 extern int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu);
97 extern int kvmppc_emulate_mmio(struct kvm_vcpu *vcpu);
98 extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu);
99 extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb);
100 extern void kvmppc_decrementer_func(struct kvm_vcpu *vcpu);
101 extern int kvmppc_sanity_check(struct kvm_vcpu *vcpu);
102 extern int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu);
103 extern void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu);
104
105 /* Core-specific hooks */
106
107 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
108 unsigned int gtlb_idx);
109 extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
110 extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
111 extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
112 extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
113 gva_t eaddr);
114 extern void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu);
115 extern void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu);
116 extern int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr,
117 enum xlate_instdata xlid, enum xlate_readwrite xlrw,
118 struct kvmppc_pte *pte);
119
120 extern int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu);
121 extern void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu);
122 extern int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu);
123 extern int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
124 struct kvm_translation *tr);
125
126 extern void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
127 extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
128
129 extern int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu);
130 extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
131
132 extern void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu,
133 ulong srr1_flags);
134 extern void kvmppc_core_queue_syscall(struct kvm_vcpu *vcpu);
135 extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu,
136 ulong srr1_flags);
137 extern void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu,
138 ulong srr1_flags);
139 extern void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu,
140 ulong srr1_flags);
141 extern void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu,
142 ulong srr1_flags);
143 extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
144 extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu);
145 extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
146 struct kvm_interrupt *irq);
147 extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu);
148 extern void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
149 ulong dear_flags,
150 ulong esr_flags);
151 extern void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
152 ulong srr1_flags,
153 ulong dar,
154 ulong dsisr);
155 extern void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu);
156 extern void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
157 ulong srr1_flags);
158
159 extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu);
160 extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu);
161
162 extern int kvmppc_booke_init(void);
163 extern void kvmppc_booke_exit(void);
164
165 extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
166 extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
167
168 extern int kvmppc_allocate_hpt(struct kvm_hpt_info *info, u32 order);
169 extern void kvmppc_set_hpt(struct kvm *kvm, struct kvm_hpt_info *info);
170 extern int kvmppc_alloc_reset_hpt(struct kvm *kvm, int order);
171 extern void kvmppc_free_hpt(struct kvm_hpt_info *info);
172 extern void kvmppc_rmap_reset(struct kvm *kvm);
173 extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu,
174 struct kvm_memory_slot *memslot, unsigned long porder);
175 extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);
176 extern long kvm_spapr_tce_attach_iommu_group(struct kvm *kvm, int tablefd,
177 struct iommu_group *grp);
178 extern void kvm_spapr_tce_release_iommu_group(struct kvm *kvm,
179 struct iommu_group *grp);
180 extern int kvmppc_switch_mmu_to_hpt(struct kvm *kvm);
181 extern int kvmppc_switch_mmu_to_radix(struct kvm *kvm);
182 extern void kvmppc_setup_partition_table(struct kvm *kvm);
183
184 extern int kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
185 struct kvm_create_spapr_tce_64 *args);
186 #define kvmppc_ioba_validate(stt, ioba, npages) \
187 (iommu_tce_check_ioba((stt)->page_shift, (stt)->offset, \
188 (stt)->size, (ioba), (npages)) ? \
189 H_PARAMETER : H_SUCCESS)
190 extern long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
191 unsigned long ioba, unsigned long tce);
192 extern long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
193 unsigned long liobn, unsigned long ioba,
194 unsigned long tce_list, unsigned long npages);
195 extern long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
196 unsigned long liobn, unsigned long ioba,
197 unsigned long tce_value, unsigned long npages);
198 extern long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
199 unsigned long ioba);
200 extern struct page *kvm_alloc_hpt_cma(unsigned long nr_pages);
201 extern void kvm_free_hpt_cma(struct page *page, unsigned long nr_pages);
202 extern int kvmppc_core_init_vm(struct kvm *kvm);
203 extern void kvmppc_core_destroy_vm(struct kvm *kvm);
204 extern void kvmppc_core_free_memslot(struct kvm *kvm,
205 struct kvm_memory_slot *slot);
206 extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
207 const struct kvm_memory_slot *old,
208 struct kvm_memory_slot *new,
209 enum kvm_mr_change change);
210 extern void kvmppc_core_commit_memory_region(struct kvm *kvm,
211 struct kvm_memory_slot *old,
212 const struct kvm_memory_slot *new,
213 enum kvm_mr_change change);
214 extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm,
215 struct kvm_ppc_smmu_info *info);
216 extern void kvmppc_core_flush_memslot(struct kvm *kvm,
217 struct kvm_memory_slot *memslot);
218
219 extern int kvmppc_bookehv_init(void);
220 extern void kvmppc_bookehv_exit(void);
221
222 extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu);
223
224 extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *);
225 extern int kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
226 struct kvm_ppc_resize_hpt *rhpt);
227 extern int kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
228 struct kvm_ppc_resize_hpt *rhpt);
229
230 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
231
232 extern int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp);
233 extern int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu);
234 extern void kvmppc_rtas_tokens_free(struct kvm *kvm);
235
236 extern int kvmppc_xics_set_xive(struct kvm *kvm, u32 irq, u32 server,
237 u32 priority);
238 extern int kvmppc_xics_get_xive(struct kvm *kvm, u32 irq, u32 *server,
239 u32 *priority);
240 extern int kvmppc_xics_int_on(struct kvm *kvm, u32 irq);
241 extern int kvmppc_xics_int_off(struct kvm *kvm, u32 irq);
242
243 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu);
244 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu);
245
246 union kvmppc_one_reg {
247 u32 wval;
248 u64 dval;
249 vector128 vval;
250 u64 vsxval[2];
251 u32 vsx32val[4];
252 u16 vsx16val[8];
253 u8 vsx8val[16];
254 struct {
255 u64 addr;
256 u64 length;
257 } vpaval;
258 u64 xive_timaval[2];
259 };
260
261 struct kvmppc_ops {
262 struct module *owner;
263 int (*get_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
264 int (*set_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
265 int (*get_one_reg)(struct kvm_vcpu *vcpu, u64 id,
266 union kvmppc_one_reg *val);
267 int (*set_one_reg)(struct kvm_vcpu *vcpu, u64 id,
268 union kvmppc_one_reg *val);
269 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
270 void (*vcpu_put)(struct kvm_vcpu *vcpu);
271 void (*inject_interrupt)(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags);
272 void (*set_msr)(struct kvm_vcpu *vcpu, u64 msr);
273 int (*vcpu_run)(struct kvm_vcpu *vcpu);
274 int (*vcpu_create)(struct kvm_vcpu *vcpu);
275 void (*vcpu_free)(struct kvm_vcpu *vcpu);
276 int (*check_requests)(struct kvm_vcpu *vcpu);
277 int (*get_dirty_log)(struct kvm *kvm, struct kvm_dirty_log *log);
278 void (*flush_memslot)(struct kvm *kvm, struct kvm_memory_slot *memslot);
279 int (*prepare_memory_region)(struct kvm *kvm,
280 const struct kvm_memory_slot *old,
281 struct kvm_memory_slot *new,
282 enum kvm_mr_change change);
283 void (*commit_memory_region)(struct kvm *kvm,
284 struct kvm_memory_slot *old,
285 const struct kvm_memory_slot *new,
286 enum kvm_mr_change change);
287 bool (*unmap_gfn_range)(struct kvm *kvm, struct kvm_gfn_range *range);
288 bool (*age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);
289 bool (*test_age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);
290 bool (*set_spte_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);
291 void (*free_memslot)(struct kvm_memory_slot *slot);
292 int (*init_vm)(struct kvm *kvm);
293 void (*destroy_vm)(struct kvm *kvm);
294 int (*get_smmu_info)(struct kvm *kvm, struct kvm_ppc_smmu_info *info);
295 int (*emulate_op)(struct kvm_vcpu *vcpu,
296 unsigned int inst, int *advance);
297 int (*emulate_mtspr)(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
298 int (*emulate_mfspr)(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
299 void (*fast_vcpu_kick)(struct kvm_vcpu *vcpu);
300 int (*arch_vm_ioctl)(struct file *filp, unsigned int ioctl,
301 unsigned long arg);
302 int (*hcall_implemented)(unsigned long hcall);
303 int (*irq_bypass_add_producer)(struct irq_bypass_consumer *,
304 struct irq_bypass_producer *);
305 void (*irq_bypass_del_producer)(struct irq_bypass_consumer *,
306 struct irq_bypass_producer *);
307 int (*configure_mmu)(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg);
308 int (*get_rmmu_info)(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
309 int (*set_smt_mode)(struct kvm *kvm, unsigned long mode,
310 unsigned long flags);
311 void (*giveup_ext)(struct kvm_vcpu *vcpu, ulong msr);
312 int (*enable_nested)(struct kvm *kvm);
313 int (*load_from_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
314 int size);
315 int (*store_to_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
316 int size);
317 int (*enable_svm)(struct kvm *kvm);
318 int (*svm_off)(struct kvm *kvm);
319 int (*enable_dawr1)(struct kvm *kvm);
320 bool (*hash_v3_possible)(void);
321 int (*create_vm_debugfs)(struct kvm *kvm);
322 int (*create_vcpu_debugfs)(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry);
323 };
324
325 extern struct kvmppc_ops *kvmppc_hv_ops;
326 extern struct kvmppc_ops *kvmppc_pr_ops;
327
kvmppc_get_last_inst(struct kvm_vcpu * vcpu,enum instruction_fetch_type type,ppc_inst_t * inst)328 static inline int kvmppc_get_last_inst(struct kvm_vcpu *vcpu,
329 enum instruction_fetch_type type, ppc_inst_t *inst)
330 {
331 int ret = EMULATE_DONE;
332 u32 fetched_inst;
333
334 /* Load the instruction manually if it failed to do so in the
335 * exit path */
336 if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
337 ret = kvmppc_load_last_inst(vcpu, type, &vcpu->arch.last_inst);
338
339 /* Write fetch_failed unswapped if the fetch failed */
340 if (ret != EMULATE_DONE) {
341 *inst = ppc_inst(KVM_INST_FETCH_FAILED);
342 return ret;
343 }
344
345 #ifdef CONFIG_PPC64
346 /* Is this a prefixed instruction? */
347 if ((vcpu->arch.last_inst >> 32) != 0) {
348 u32 prefix = vcpu->arch.last_inst >> 32;
349 u32 suffix = vcpu->arch.last_inst;
350 if (kvmppc_need_byteswap(vcpu)) {
351 prefix = swab32(prefix);
352 suffix = swab32(suffix);
353 }
354 *inst = ppc_inst_prefix(prefix, suffix);
355 return EMULATE_DONE;
356 }
357 #endif
358
359 fetched_inst = kvmppc_need_byteswap(vcpu) ?
360 swab32(vcpu->arch.last_inst) :
361 vcpu->arch.last_inst;
362 *inst = ppc_inst(fetched_inst);
363 return EMULATE_DONE;
364 }
365
is_kvmppc_hv_enabled(struct kvm * kvm)366 static inline bool is_kvmppc_hv_enabled(struct kvm *kvm)
367 {
368 return kvm->arch.kvm_ops == kvmppc_hv_ops;
369 }
370
371 extern int kvmppc_hwrng_present(void);
372
373 /*
374 * Cuts out inst bits with ordering according to spec.
375 * That means the leftmost bit is zero. All given bits are included.
376 */
kvmppc_get_field(u64 inst,int msb,int lsb)377 static inline u32 kvmppc_get_field(u64 inst, int msb, int lsb)
378 {
379 u32 r;
380 u32 mask;
381
382 BUG_ON(msb > lsb);
383
384 mask = (1 << (lsb - msb + 1)) - 1;
385 r = (inst >> (63 - lsb)) & mask;
386
387 return r;
388 }
389
390 /*
391 * Replaces inst bits with ordering according to spec.
392 */
kvmppc_set_field(u64 inst,int msb,int lsb,int value)393 static inline u32 kvmppc_set_field(u64 inst, int msb, int lsb, int value)
394 {
395 u32 r;
396 u32 mask;
397
398 BUG_ON(msb > lsb);
399
400 mask = ((1 << (lsb - msb + 1)) - 1) << (63 - lsb);
401 r = (inst & ~mask) | ((value << (63 - lsb)) & mask);
402
403 return r;
404 }
405
406 #define one_reg_size(id) \
407 (1ul << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
408
409 #define get_reg_val(id, reg) ({ \
410 union kvmppc_one_reg __u; \
411 switch (one_reg_size(id)) { \
412 case 4: __u.wval = (reg); break; \
413 case 8: __u.dval = (reg); break; \
414 default: BUG(); \
415 } \
416 __u; \
417 })
418
419
420 #define set_reg_val(id, val) ({ \
421 u64 __v; \
422 switch (one_reg_size(id)) { \
423 case 4: __v = (val).wval; break; \
424 case 8: __v = (val).dval; break; \
425 default: BUG(); \
426 } \
427 __v; \
428 })
429
430 int kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
431 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
432
433 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
434 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
435
436 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
437 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
438 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
439 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
440
441 void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid);
442
443 struct openpic;
444
445 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
446 extern void kvm_cma_reserve(void) __init;
kvmppc_set_xics_phys(int cpu,unsigned long addr)447 static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
448 {
449 paca_ptrs[cpu]->kvm_hstate.xics_phys = (void __iomem *)addr;
450 }
451
kvmppc_set_xive_tima(int cpu,unsigned long phys_addr,void __iomem * virt_addr)452 static inline void kvmppc_set_xive_tima(int cpu,
453 unsigned long phys_addr,
454 void __iomem *virt_addr)
455 {
456 paca_ptrs[cpu]->kvm_hstate.xive_tima_phys = (void __iomem *)phys_addr;
457 paca_ptrs[cpu]->kvm_hstate.xive_tima_virt = virt_addr;
458 }
459
kvmppc_get_xics_latch(void)460 static inline u32 kvmppc_get_xics_latch(void)
461 {
462 u32 xirr;
463
464 xirr = get_paca()->kvm_hstate.saved_xirr;
465 get_paca()->kvm_hstate.saved_xirr = 0;
466 return xirr;
467 }
468
469 /*
470 * To avoid the need to unnecessarily exit fully to the host kernel, an IPI to
471 * a CPU thread that's running/napping inside of a guest is by default regarded
472 * as a request to wake the CPU (if needed) and continue execution within the
473 * guest, potentially to process new state like externally-generated
474 * interrupts or IPIs sent from within the guest itself (e.g. H_PROD/H_IPI).
475 *
476 * To force an exit to the host kernel, kvmppc_set_host_ipi() must be called
477 * prior to issuing the IPI to set the corresponding 'host_ipi' flag in the
478 * target CPU's PACA. To avoid unnecessary exits to the host, this flag should
479 * be immediately cleared via kvmppc_clear_host_ipi() by the IPI handler on
480 * the receiving side prior to processing the IPI work.
481 *
482 * NOTE:
483 *
484 * We currently issue an smp_mb() at the beginning of kvmppc_set_host_ipi().
485 * This is to guard against sequences such as the following:
486 *
487 * CPU
488 * X: smp_muxed_ipi_set_message():
489 * X: smp_mb()
490 * X: message[RESCHEDULE] = 1
491 * X: doorbell_global_ipi(42):
492 * X: kvmppc_set_host_ipi(42)
493 * X: ppc_msgsnd_sync()/smp_mb()
494 * X: ppc_msgsnd() -> 42
495 * 42: doorbell_exception(): // from CPU X
496 * 42: ppc_msgsync()
497 * 105: smp_muxed_ipi_set_message():
498 * 105: smb_mb()
499 * // STORE DEFERRED DUE TO RE-ORDERING
500 * --105: message[CALL_FUNCTION] = 1
501 * | 105: doorbell_global_ipi(42):
502 * | 105: kvmppc_set_host_ipi(42)
503 * | 42: kvmppc_clear_host_ipi(42)
504 * | 42: smp_ipi_demux_relaxed()
505 * | 42: // returns to executing guest
506 * | // RE-ORDERED STORE COMPLETES
507 * ->105: message[CALL_FUNCTION] = 1
508 * 105: ppc_msgsnd_sync()/smp_mb()
509 * 105: ppc_msgsnd() -> 42
510 * 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored
511 * 105: // hangs waiting on 42 to process messages/call_single_queue
512 *
513 * We also issue an smp_mb() at the end of kvmppc_clear_host_ipi(). This is
514 * to guard against sequences such as the following (as well as to create
515 * a read-side pairing with the barrier in kvmppc_set_host_ipi()):
516 *
517 * CPU
518 * X: smp_muxed_ipi_set_message():
519 * X: smp_mb()
520 * X: message[RESCHEDULE] = 1
521 * X: doorbell_global_ipi(42):
522 * X: kvmppc_set_host_ipi(42)
523 * X: ppc_msgsnd_sync()/smp_mb()
524 * X: ppc_msgsnd() -> 42
525 * 42: doorbell_exception(): // from CPU X
526 * 42: ppc_msgsync()
527 * // STORE DEFERRED DUE TO RE-ORDERING
528 * -- 42: kvmppc_clear_host_ipi(42)
529 * | 42: smp_ipi_demux_relaxed()
530 * | 105: smp_muxed_ipi_set_message():
531 * | 105: smb_mb()
532 * | 105: message[CALL_FUNCTION] = 1
533 * | 105: doorbell_global_ipi(42):
534 * | 105: kvmppc_set_host_ipi(42)
535 * | // RE-ORDERED STORE COMPLETES
536 * -> 42: kvmppc_clear_host_ipi(42)
537 * 42: // returns to executing guest
538 * 105: ppc_msgsnd_sync()/smp_mb()
539 * 105: ppc_msgsnd() -> 42
540 * 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored
541 * 105: // hangs waiting on 42 to process messages/call_single_queue
542 */
kvmppc_set_host_ipi(int cpu)543 static inline void kvmppc_set_host_ipi(int cpu)
544 {
545 /*
546 * order stores of IPI messages vs. setting of host_ipi flag
547 *
548 * pairs with the barrier in kvmppc_clear_host_ipi()
549 */
550 smp_mb();
551 WRITE_ONCE(paca_ptrs[cpu]->kvm_hstate.host_ipi, 1);
552 }
553
kvmppc_clear_host_ipi(int cpu)554 static inline void kvmppc_clear_host_ipi(int cpu)
555 {
556 WRITE_ONCE(paca_ptrs[cpu]->kvm_hstate.host_ipi, 0);
557 /*
558 * order clearing of host_ipi flag vs. processing of IPI messages
559 *
560 * pairs with the barrier in kvmppc_set_host_ipi()
561 */
562 smp_mb();
563 }
564
kvmppc_fast_vcpu_kick(struct kvm_vcpu * vcpu)565 static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
566 {
567 vcpu->kvm->arch.kvm_ops->fast_vcpu_kick(vcpu);
568 }
569
570 extern void kvm_hv_vm_activated(void);
571 extern void kvm_hv_vm_deactivated(void);
572 extern bool kvm_hv_mode_active(void);
573
574 extern void kvmppc_check_need_tlb_flush(struct kvm *kvm, int pcpu);
575
576 #else
kvm_cma_reserve(void)577 static inline void __init kvm_cma_reserve(void)
578 {}
579
kvmppc_set_xics_phys(int cpu,unsigned long addr)580 static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
581 {}
582
kvmppc_set_xive_tima(int cpu,unsigned long phys_addr,void __iomem * virt_addr)583 static inline void kvmppc_set_xive_tima(int cpu,
584 unsigned long phys_addr,
585 void __iomem *virt_addr)
586 {}
587
kvmppc_get_xics_latch(void)588 static inline u32 kvmppc_get_xics_latch(void)
589 {
590 return 0;
591 }
592
kvmppc_set_host_ipi(int cpu)593 static inline void kvmppc_set_host_ipi(int cpu)
594 {}
595
kvmppc_clear_host_ipi(int cpu)596 static inline void kvmppc_clear_host_ipi(int cpu)
597 {}
598
kvmppc_fast_vcpu_kick(struct kvm_vcpu * vcpu)599 static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
600 {
601 kvm_vcpu_kick(vcpu);
602 }
603
kvm_hv_mode_active(void)604 static inline bool kvm_hv_mode_active(void) { return false; }
605
606 #endif
607
608 #ifdef CONFIG_PPC_PSERIES
kvmhv_on_pseries(void)609 static inline bool kvmhv_on_pseries(void)
610 {
611 return !cpu_has_feature(CPU_FTR_HVMODE);
612 }
613 #else
kvmhv_on_pseries(void)614 static inline bool kvmhv_on_pseries(void)
615 {
616 return false;
617 }
618 #endif
619
620 #ifdef CONFIG_KVM_XICS
kvmppc_xics_enabled(struct kvm_vcpu * vcpu)621 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
622 {
623 return vcpu->arch.irq_type == KVMPPC_IRQ_XICS;
624 }
625
kvmppc_get_passthru_irqmap(struct kvm * kvm)626 static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
627 struct kvm *kvm)
628 {
629 if (kvm && kvm_irq_bypass)
630 return kvm->arch.pimap;
631 return NULL;
632 }
633
634 extern void kvmppc_alloc_host_rm_ops(void);
635 extern void kvmppc_free_host_rm_ops(void);
636 extern void kvmppc_free_pimap(struct kvm *kvm);
637 extern int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall);
638 extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
639 extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd);
640 extern int kvmppc_xive_xics_hcall(struct kvm_vcpu *vcpu, u32 req);
641 extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu);
642 extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
643 extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev,
644 struct kvm_vcpu *vcpu, u32 cpu);
645 extern void kvmppc_xics_ipi_action(void);
646 extern void kvmppc_xics_set_mapped(struct kvm *kvm, unsigned long guest_irq,
647 unsigned long host_irq);
648 extern void kvmppc_xics_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
649 unsigned long host_irq);
650 extern long kvmppc_deliver_irq_passthru(struct kvm_vcpu *vcpu, __be32 xirr,
651 struct kvmppc_irq_map *irq_map,
652 struct kvmppc_passthru_irqmap *pimap,
653 bool *again);
654
655 extern int kvmppc_xics_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
656 int level, bool line_status);
657
658 extern int h_ipi_redirect;
659 #else
kvmppc_get_passthru_irqmap(struct kvm * kvm)660 static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
661 struct kvm *kvm)
662 { return NULL; }
kvmppc_alloc_host_rm_ops(void)663 static inline void kvmppc_alloc_host_rm_ops(void) {}
kvmppc_free_host_rm_ops(void)664 static inline void kvmppc_free_host_rm_ops(void) {}
kvmppc_free_pimap(struct kvm * kvm)665 static inline void kvmppc_free_pimap(struct kvm *kvm) {}
kvmppc_xics_rm_complete(struct kvm_vcpu * vcpu,u32 hcall)666 static inline int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
667 { return 0; }
kvmppc_xics_enabled(struct kvm_vcpu * vcpu)668 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
669 { return 0; }
kvmppc_xics_free_icp(struct kvm_vcpu * vcpu)670 static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }
kvmppc_xics_hcall(struct kvm_vcpu * vcpu,u32 cmd)671 static inline int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
672 { return 0; }
kvmppc_xive_xics_hcall(struct kvm_vcpu * vcpu,u32 req)673 static inline int kvmppc_xive_xics_hcall(struct kvm_vcpu *vcpu, u32 req)
674 { return 0; }
675 #endif
676
677 #ifdef CONFIG_KVM_XIVE
678 /*
679 * Below the first "xive" is the "eXternal Interrupt Virtualization Engine"
680 * ie. P9 new interrupt controller, while the second "xive" is the legacy
681 * "eXternal Interrupt Vector Entry" which is the configuration of an
682 * interrupt on the "xics" interrupt controller on P8 and earlier. Those
683 * two function consume or produce a legacy "XIVE" state from the
684 * new "XIVE" interrupt controller.
685 */
686 extern int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 server,
687 u32 priority);
688 extern int kvmppc_xive_get_xive(struct kvm *kvm, u32 irq, u32 *server,
689 u32 *priority);
690 extern int kvmppc_xive_int_on(struct kvm *kvm, u32 irq);
691 extern int kvmppc_xive_int_off(struct kvm *kvm, u32 irq);
692
693 extern int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
694 struct kvm_vcpu *vcpu, u32 cpu);
695 extern void kvmppc_xive_cleanup_vcpu(struct kvm_vcpu *vcpu);
696 extern int kvmppc_xive_set_mapped(struct kvm *kvm, unsigned long guest_irq,
697 unsigned long host_irq);
698 extern int kvmppc_xive_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
699 unsigned long host_irq);
700 extern u64 kvmppc_xive_get_icp(struct kvm_vcpu *vcpu);
701 extern int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
702
703 extern int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
704 int level, bool line_status);
705 extern void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu);
706 extern void kvmppc_xive_pull_vcpu(struct kvm_vcpu *vcpu);
707 extern bool kvmppc_xive_rearm_escalation(struct kvm_vcpu *vcpu);
708
kvmppc_xive_enabled(struct kvm_vcpu * vcpu)709 static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
710 {
711 return vcpu->arch.irq_type == KVMPPC_IRQ_XIVE;
712 }
713
714 extern int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
715 struct kvm_vcpu *vcpu, u32 cpu);
716 extern void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu);
717 extern int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu,
718 union kvmppc_one_reg *val);
719 extern int kvmppc_xive_native_set_vp(struct kvm_vcpu *vcpu,
720 union kvmppc_one_reg *val);
721 extern bool kvmppc_xive_native_supported(void);
722
723 #else
kvmppc_xive_set_xive(struct kvm * kvm,u32 irq,u32 server,u32 priority)724 static inline int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 server,
725 u32 priority) { return -1; }
kvmppc_xive_get_xive(struct kvm * kvm,u32 irq,u32 * server,u32 * priority)726 static inline int kvmppc_xive_get_xive(struct kvm *kvm, u32 irq, u32 *server,
727 u32 *priority) { return -1; }
kvmppc_xive_int_on(struct kvm * kvm,u32 irq)728 static inline int kvmppc_xive_int_on(struct kvm *kvm, u32 irq) { return -1; }
kvmppc_xive_int_off(struct kvm * kvm,u32 irq)729 static inline int kvmppc_xive_int_off(struct kvm *kvm, u32 irq) { return -1; }
730
kvmppc_xive_connect_vcpu(struct kvm_device * dev,struct kvm_vcpu * vcpu,u32 cpu)731 static inline int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
732 struct kvm_vcpu *vcpu, u32 cpu) { return -EBUSY; }
kvmppc_xive_cleanup_vcpu(struct kvm_vcpu * vcpu)733 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)734 static inline int kvmppc_xive_set_mapped(struct kvm *kvm, unsigned long guest_irq,
735 struct irq_desc *host_desc) { return -ENODEV; }
kvmppc_xive_clr_mapped(struct kvm * kvm,unsigned long guest_irq,struct irq_desc * host_desc)736 static inline int kvmppc_xive_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
737 struct irq_desc *host_desc) { return -ENODEV; }
kvmppc_xive_get_icp(struct kvm_vcpu * vcpu)738 static inline u64 kvmppc_xive_get_icp(struct kvm_vcpu *vcpu) { return 0; }
kvmppc_xive_set_icp(struct kvm_vcpu * vcpu,u64 icpval)739 static inline int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval) { return -ENOENT; }
740
kvmppc_xive_set_irq(struct kvm * kvm,int irq_source_id,u32 irq,int level,bool line_status)741 static inline int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
742 int level, bool line_status) { return -ENODEV; }
kvmppc_xive_push_vcpu(struct kvm_vcpu * vcpu)743 static inline void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu) { }
kvmppc_xive_pull_vcpu(struct kvm_vcpu * vcpu)744 static inline void kvmppc_xive_pull_vcpu(struct kvm_vcpu *vcpu) { }
kvmppc_xive_rearm_escalation(struct kvm_vcpu * vcpu)745 static inline bool kvmppc_xive_rearm_escalation(struct kvm_vcpu *vcpu) { return true; }
746
kvmppc_xive_enabled(struct kvm_vcpu * vcpu)747 static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
748 { return 0; }
kvmppc_xive_native_connect_vcpu(struct kvm_device * dev,struct kvm_vcpu * vcpu,u32 cpu)749 static inline int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
750 struct kvm_vcpu *vcpu, u32 cpu) { return -EBUSY; }
kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu * vcpu)751 static inline void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu) { }
kvmppc_xive_native_get_vp(struct kvm_vcpu * vcpu,union kvmppc_one_reg * val)752 static inline int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu,
753 union kvmppc_one_reg *val)
754 { return 0; }
kvmppc_xive_native_set_vp(struct kvm_vcpu * vcpu,union kvmppc_one_reg * val)755 static inline int kvmppc_xive_native_set_vp(struct kvm_vcpu *vcpu,
756 union kvmppc_one_reg *val)
757 { return -ENOENT; }
758
759 #endif /* CONFIG_KVM_XIVE */
760
761 #if defined(CONFIG_PPC_POWERNV) && defined(CONFIG_KVM_BOOK3S_64_HANDLER)
xics_on_xive(void)762 static inline bool xics_on_xive(void)
763 {
764 return xive_enabled() && cpu_has_feature(CPU_FTR_HVMODE);
765 }
766 #else
xics_on_xive(void)767 static inline bool xics_on_xive(void)
768 {
769 return false;
770 }
771 #endif
772
773 /*
774 * Prototypes for functions called only from assembler code.
775 * Having prototypes reduces sparse errors.
776 */
777 long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
778 unsigned long ioba, unsigned long tce);
779 long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
780 unsigned long liobn, unsigned long ioba,
781 unsigned long tce_list, unsigned long npages);
782 long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
783 unsigned long liobn, unsigned long ioba,
784 unsigned long tce_value, unsigned long npages);
785 long int kvmppc_rm_h_confer(struct kvm_vcpu *vcpu, int target,
786 unsigned int yield_count);
787 long kvmppc_rm_h_random(struct kvm_vcpu *vcpu);
788 void kvmhv_commence_exit(int trap);
789 void kvmppc_realmode_machine_check(struct kvm_vcpu *vcpu);
790 void kvmppc_subcore_enter_guest(void);
791 void kvmppc_subcore_exit_guest(void);
792 long kvmppc_realmode_hmi_handler(void);
793 long kvmppc_p9_realmode_hmi_handler(struct kvm_vcpu *vcpu);
794 long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
795 long pte_index, unsigned long pteh, unsigned long ptel);
796 long kvmppc_h_remove(struct kvm_vcpu *vcpu, unsigned long flags,
797 unsigned long pte_index, unsigned long avpn);
798 long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu);
799 long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
800 unsigned long pte_index, unsigned long avpn);
801 long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags,
802 unsigned long pte_index);
803 long kvmppc_h_clear_ref(struct kvm_vcpu *vcpu, unsigned long flags,
804 unsigned long pte_index);
805 long kvmppc_h_clear_mod(struct kvm_vcpu *vcpu, unsigned long flags,
806 unsigned long pte_index);
807 long kvmppc_rm_h_page_init(struct kvm_vcpu *vcpu, unsigned long flags,
808 unsigned long dest, unsigned long src);
809 long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr,
810 unsigned long slb_v, unsigned int status, bool data);
811 void kvmppc_guest_entry_inject_int(struct kvm_vcpu *vcpu);
812
813 /*
814 * Host-side operations we want to set up while running in real
815 * mode in the guest operating on the xics.
816 * Currently only VCPU wakeup is supported.
817 */
818
819 union kvmppc_rm_state {
820 unsigned long raw;
821 struct {
822 u32 in_host;
823 u32 rm_action;
824 };
825 };
826
827 struct kvmppc_host_rm_core {
828 union kvmppc_rm_state rm_state;
829 void *rm_data;
830 char pad[112];
831 };
832
833 struct kvmppc_host_rm_ops {
834 struct kvmppc_host_rm_core *rm_core;
835 void (*vcpu_kick)(struct kvm_vcpu *vcpu);
836 };
837
838 extern struct kvmppc_host_rm_ops *kvmppc_host_rm_ops_hv;
839
kvmppc_get_epr(struct kvm_vcpu * vcpu)840 static inline unsigned long kvmppc_get_epr(struct kvm_vcpu *vcpu)
841 {
842 #ifdef CONFIG_KVM_BOOKE_HV
843 return mfspr(SPRN_GEPR);
844 #elif defined(CONFIG_BOOKE)
845 return vcpu->arch.epr;
846 #else
847 return 0;
848 #endif
849 }
850
kvmppc_set_epr(struct kvm_vcpu * vcpu,u32 epr)851 static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr)
852 {
853 #ifdef CONFIG_KVM_BOOKE_HV
854 mtspr(SPRN_GEPR, epr);
855 #elif defined(CONFIG_BOOKE)
856 vcpu->arch.epr = epr;
857 #endif
858 }
859
860 #ifdef CONFIG_KVM_MPIC
861
862 void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu);
863 int kvmppc_mpic_connect_vcpu(struct kvm_device *dev, struct kvm_vcpu *vcpu,
864 u32 cpu);
865 void kvmppc_mpic_disconnect_vcpu(struct openpic *opp, struct kvm_vcpu *vcpu);
866
867 #else
868
kvmppc_mpic_set_epr(struct kvm_vcpu * vcpu)869 static inline void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu)
870 {
871 }
872
kvmppc_mpic_connect_vcpu(struct kvm_device * dev,struct kvm_vcpu * vcpu,u32 cpu)873 static inline int kvmppc_mpic_connect_vcpu(struct kvm_device *dev,
874 struct kvm_vcpu *vcpu, u32 cpu)
875 {
876 return -EINVAL;
877 }
878
kvmppc_mpic_disconnect_vcpu(struct openpic * opp,struct kvm_vcpu * vcpu)879 static inline void kvmppc_mpic_disconnect_vcpu(struct openpic *opp,
880 struct kvm_vcpu *vcpu)
881 {
882 }
883
884 #endif /* CONFIG_KVM_MPIC */
885
886 int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
887 struct kvm_config_tlb *cfg);
888 int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
889 struct kvm_dirty_tlb *cfg);
890
891 long kvmppc_alloc_lpid(void);
892 void kvmppc_free_lpid(long lpid);
893 void kvmppc_init_lpid(unsigned long nr_lpids);
894
kvmppc_mmu_flush_icache(kvm_pfn_t pfn)895 static inline void kvmppc_mmu_flush_icache(kvm_pfn_t pfn)
896 {
897 struct folio *folio;
898 /*
899 * We can only access pages that the kernel maps
900 * as memory. Bail out for unmapped ones.
901 */
902 if (!pfn_valid(pfn))
903 return;
904
905 /* Clear i-cache for new pages */
906 folio = page_folio(pfn_to_page(pfn));
907 if (!test_bit(PG_dcache_clean, &folio->flags)) {
908 flush_dcache_icache_folio(folio);
909 set_bit(PG_dcache_clean, &folio->flags);
910 }
911 }
912
913 /*
914 * Shared struct helpers. The shared struct can be little or big endian,
915 * depending on the guest endianness. So expose helpers to all of them.
916 */
kvmppc_shared_big_endian(struct kvm_vcpu * vcpu)917 static inline bool kvmppc_shared_big_endian(struct kvm_vcpu *vcpu)
918 {
919 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
920 /* Only Book3S_64 PR supports bi-endian for now */
921 return vcpu->arch.shared_big_endian;
922 #elif defined(CONFIG_PPC_BOOK3S_64) && defined(__LITTLE_ENDIAN__)
923 /* Book3s_64 HV on little endian is always little endian */
924 return false;
925 #else
926 return true;
927 #endif
928 }
929
930 #define SPRNG_WRAPPER_GET(reg, bookehv_spr) \
931 static inline ulong kvmppc_get_##reg(struct kvm_vcpu *vcpu) \
932 { \
933 return mfspr(bookehv_spr); \
934 } \
935
936 #define SPRNG_WRAPPER_SET(reg, bookehv_spr) \
937 static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, ulong val) \
938 { \
939 mtspr(bookehv_spr, val); \
940 } \
941
942 #define SHARED_WRAPPER_GET(reg, size) \
943 static inline u##size kvmppc_get_##reg(struct kvm_vcpu *vcpu) \
944 { \
945 if (kvmppc_shared_big_endian(vcpu)) \
946 return be##size##_to_cpu(vcpu->arch.shared->reg); \
947 else \
948 return le##size##_to_cpu(vcpu->arch.shared->reg); \
949 } \
950
951 #define SHARED_WRAPPER_SET(reg, size) \
952 static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, u##size val) \
953 { \
954 if (kvmppc_shared_big_endian(vcpu)) \
955 vcpu->arch.shared->reg = cpu_to_be##size(val); \
956 else \
957 vcpu->arch.shared->reg = cpu_to_le##size(val); \
958 } \
959
960 #define SHARED_WRAPPER(reg, size) \
961 SHARED_WRAPPER_GET(reg, size) \
962 SHARED_WRAPPER_SET(reg, size) \
963
964 #define SPRNG_WRAPPER(reg, bookehv_spr) \
965 SPRNG_WRAPPER_GET(reg, bookehv_spr) \
966 SPRNG_WRAPPER_SET(reg, bookehv_spr) \
967
968 #ifdef CONFIG_KVM_BOOKE_HV
969
970 #define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr) \
971 SPRNG_WRAPPER(reg, bookehv_spr) \
972
973 #else
974
975 #define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr) \
976 SHARED_WRAPPER(reg, size) \
977
978 #endif
979
980 SHARED_WRAPPER(critical, 64)
981 SHARED_SPRNG_WRAPPER(sprg0, 64, SPRN_GSPRG0)
982 SHARED_SPRNG_WRAPPER(sprg1, 64, SPRN_GSPRG1)
983 SHARED_SPRNG_WRAPPER(sprg2, 64, SPRN_GSPRG2)
984 SHARED_SPRNG_WRAPPER(sprg3, 64, SPRN_GSPRG3)
985 SHARED_SPRNG_WRAPPER(srr0, 64, SPRN_GSRR0)
986 SHARED_SPRNG_WRAPPER(srr1, 64, SPRN_GSRR1)
987 SHARED_SPRNG_WRAPPER(dar, 64, SPRN_GDEAR)
988 SHARED_SPRNG_WRAPPER(esr, 64, SPRN_GESR)
989 SHARED_WRAPPER_GET(msr, 64)
kvmppc_set_msr_fast(struct kvm_vcpu * vcpu,u64 val)990 static inline void kvmppc_set_msr_fast(struct kvm_vcpu *vcpu, u64 val)
991 {
992 if (kvmppc_shared_big_endian(vcpu))
993 vcpu->arch.shared->msr = cpu_to_be64(val);
994 else
995 vcpu->arch.shared->msr = cpu_to_le64(val);
996 }
997 SHARED_WRAPPER(dsisr, 32)
998 SHARED_WRAPPER(int_pending, 32)
999 SHARED_WRAPPER(sprg4, 64)
1000 SHARED_WRAPPER(sprg5, 64)
1001 SHARED_WRAPPER(sprg6, 64)
1002 SHARED_WRAPPER(sprg7, 64)
1003
kvmppc_get_sr(struct kvm_vcpu * vcpu,int nr)1004 static inline u32 kvmppc_get_sr(struct kvm_vcpu *vcpu, int nr)
1005 {
1006 if (kvmppc_shared_big_endian(vcpu))
1007 return be32_to_cpu(vcpu->arch.shared->sr[nr]);
1008 else
1009 return le32_to_cpu(vcpu->arch.shared->sr[nr]);
1010 }
1011
kvmppc_set_sr(struct kvm_vcpu * vcpu,int nr,u32 val)1012 static inline void kvmppc_set_sr(struct kvm_vcpu *vcpu, int nr, u32 val)
1013 {
1014 if (kvmppc_shared_big_endian(vcpu))
1015 vcpu->arch.shared->sr[nr] = cpu_to_be32(val);
1016 else
1017 vcpu->arch.shared->sr[nr] = cpu_to_le32(val);
1018 }
1019
1020 /*
1021 * Please call after prepare_to_enter. This function puts the lazy ee and irq
1022 * disabled tracking state back to normal mode, without actually enabling
1023 * interrupts.
1024 */
kvmppc_fix_ee_before_entry(void)1025 static inline void kvmppc_fix_ee_before_entry(void)
1026 {
1027 trace_hardirqs_on();
1028
1029 #ifdef CONFIG_PPC64
1030 /*
1031 * To avoid races, the caller must have gone directly from having
1032 * interrupts fully-enabled to hard-disabled.
1033 */
1034 WARN_ON(local_paca->irq_happened != PACA_IRQ_HARD_DIS);
1035
1036 /* Only need to enable IRQs by hard enabling them after this */
1037 local_paca->irq_happened = 0;
1038 irq_soft_mask_set(IRQS_ENABLED);
1039 #endif
1040 }
1041
kvmppc_fix_ee_after_exit(void)1042 static inline void kvmppc_fix_ee_after_exit(void)
1043 {
1044 #ifdef CONFIG_PPC64
1045 /* Only need to enable IRQs by hard enabling them after this */
1046 local_paca->irq_happened = PACA_IRQ_HARD_DIS;
1047 irq_soft_mask_set(IRQS_ALL_DISABLED);
1048 #endif
1049
1050 trace_hardirqs_off();
1051 }
1052
1053
kvmppc_get_ea_indexed(struct kvm_vcpu * vcpu,int ra,int rb)1054 static inline ulong kvmppc_get_ea_indexed(struct kvm_vcpu *vcpu, int ra, int rb)
1055 {
1056 ulong ea;
1057 ulong msr_64bit = 0;
1058
1059 ea = kvmppc_get_gpr(vcpu, rb);
1060 if (ra)
1061 ea += kvmppc_get_gpr(vcpu, ra);
1062
1063 #if defined(CONFIG_PPC_BOOK3E_64)
1064 msr_64bit = MSR_CM;
1065 #elif defined(CONFIG_PPC_BOOK3S_64)
1066 msr_64bit = MSR_SF;
1067 #endif
1068
1069 if (!(kvmppc_get_msr(vcpu) & msr_64bit))
1070 ea = (uint32_t)ea;
1071
1072 return ea;
1073 }
1074
1075 extern void xics_wake_cpu(int cpu);
1076
1077 #endif /* __POWERPC_KVM_PPC_H__ */
1078