1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * definition for kvm on s390
4 *
5 * Copyright IBM Corp. 2008, 2020
6 *
7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
9 * Christian Ehrhardt <ehrhardt@de.ibm.com>
10 */
11
12 #ifndef ARCH_S390_KVM_S390_H
13 #define ARCH_S390_KVM_S390_H
14
15 #include <linux/hrtimer.h>
16 #include <linux/kvm.h>
17 #include <linux/kvm_host.h>
18 #include <linux/lockdep.h>
19 #include <asm/facility.h>
20 #include <asm/processor.h>
21 #include <asm/sclp.h>
22
23 #define KVM_S390_UCONTROL_MEMSLOT (KVM_USER_MEM_SLOTS + 0)
24
kvm_s390_fpu_store(struct kvm_run * run)25 static inline void kvm_s390_fpu_store(struct kvm_run *run)
26 {
27 fpu_stfpc(&run->s.regs.fpc);
28 if (cpu_has_vx())
29 save_vx_regs((__vector128 *)&run->s.regs.vrs);
30 else
31 save_fp_regs((freg_t *)&run->s.regs.fprs);
32 }
33
kvm_s390_fpu_load(struct kvm_run * run)34 static inline void kvm_s390_fpu_load(struct kvm_run *run)
35 {
36 fpu_lfpc_safe(&run->s.regs.fpc);
37 if (cpu_has_vx())
38 load_vx_regs((__vector128 *)&run->s.regs.vrs);
39 else
40 load_fp_regs((freg_t *)&run->s.regs.fprs);
41 }
42
43 /* Transactional Memory Execution related macros */
44 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
45 #define TDB_FORMAT1 1
46 #define IS_ITDB_VALID(vcpu) \
47 ((*(char *)phys_to_virt((vcpu)->arch.sie_block->itdba) == TDB_FORMAT1))
48
49 extern debug_info_t *kvm_s390_dbf;
50 extern debug_info_t *kvm_s390_dbf_uv;
51
52 #define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
53 do { \
54 debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \
55 d_args); \
56 debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \
57 "%d: " d_string "\n", (d_kvm)->userspace_pid, \
58 d_args); \
59 } while (0)
60
61 #define KVM_EVENT(d_loglevel, d_string, d_args...)\
62 do { \
63 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
64 d_args); \
65 } while (0)
66
67 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
68 do { \
69 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
70 d_args); \
71 } while (0)
72
73 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
74 do { \
75 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
76 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
77 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
78 d_args); \
79 } while (0)
80
kvm_s390_set_cpuflags(struct kvm_vcpu * vcpu,u32 flags)81 static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
82 {
83 atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
84 }
85
kvm_s390_clear_cpuflags(struct kvm_vcpu * vcpu,u32 flags)86 static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
87 {
88 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
89 }
90
kvm_s390_test_cpuflags(struct kvm_vcpu * vcpu,u32 flags)91 static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
92 {
93 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags;
94 }
95
is_vcpu_stopped(struct kvm_vcpu * vcpu)96 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
97 {
98 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
99 }
100
is_vcpu_idle(struct kvm_vcpu * vcpu)101 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
102 {
103 return test_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask);
104 }
105
kvm_is_ucontrol(struct kvm * kvm)106 static inline int kvm_is_ucontrol(struct kvm *kvm)
107 {
108 #ifdef CONFIG_KVM_S390_UCONTROL
109 if (kvm->arch.gmap)
110 return 0;
111 return 1;
112 #else
113 return 0;
114 #endif
115 }
116
117 #define GUEST_PREFIX_SHIFT 13
kvm_s390_get_prefix(struct kvm_vcpu * vcpu)118 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
119 {
120 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
121 }
122
kvm_s390_set_prefix(struct kvm_vcpu * vcpu,u32 prefix)123 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
124 {
125 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
126 prefix);
127 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
128 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
129 kvm_make_request(KVM_REQ_REFRESH_GUEST_PREFIX, vcpu);
130 }
131
kvm_s390_get_base_disp_s(struct kvm_vcpu * vcpu,u8 * ar)132 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
133 {
134 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
135 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
136
137 if (ar)
138 *ar = base2;
139
140 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
141 }
142
kvm_s390_get_base_disp_siy(struct kvm_vcpu * vcpu,u8 * ar)143 static inline u64 kvm_s390_get_base_disp_siy(struct kvm_vcpu *vcpu, u8 *ar)
144 {
145 u32 base1 = vcpu->arch.sie_block->ipb >> 28;
146 s64 disp1;
147
148 /* The displacement is a 20bit _SIGNED_ value */
149 disp1 = sign_extend64(((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
150 ((vcpu->arch.sie_block->ipb & 0xff00) << 4), 19);
151
152 if (ar)
153 *ar = base1;
154
155 return (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
156 }
157
kvm_s390_get_base_disp_sse(struct kvm_vcpu * vcpu,u64 * address1,u64 * address2,u8 * ar_b1,u8 * ar_b2)158 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
159 u64 *address1, u64 *address2,
160 u8 *ar_b1, u8 *ar_b2)
161 {
162 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
163 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
164 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
165 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
166
167 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
168 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
169
170 if (ar_b1)
171 *ar_b1 = base1;
172 if (ar_b2)
173 *ar_b2 = base2;
174 }
175
kvm_s390_get_regs_rre(struct kvm_vcpu * vcpu,int * r1,int * r2)176 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
177 {
178 if (r1)
179 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
180 if (r2)
181 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
182 }
183
kvm_s390_get_base_disp_rsy(struct kvm_vcpu * vcpu,u8 * ar)184 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
185 {
186 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
187 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
188 ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
189 /* The displacement is a 20bit _SIGNED_ value */
190 if (disp2 & 0x80000)
191 disp2+=0xfff00000;
192
193 if (ar)
194 *ar = base2;
195
196 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
197 }
198
kvm_s390_get_base_disp_rs(struct kvm_vcpu * vcpu,u8 * ar)199 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
200 {
201 u32 base2 = vcpu->arch.sie_block->ipb >> 28;
202 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
203
204 if (ar)
205 *ar = base2;
206
207 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
208 }
209
210 /* Set the condition code in the guest program status word */
kvm_s390_set_psw_cc(struct kvm_vcpu * vcpu,unsigned long cc)211 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
212 {
213 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
214 vcpu->arch.sie_block->gpsw.mask |= cc << 44;
215 }
216
217 /* test availability of facility in a kvm instance */
test_kvm_facility(struct kvm * kvm,unsigned long nr)218 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
219 {
220 return __test_facility(nr, kvm->arch.model.fac_mask) &&
221 __test_facility(nr, kvm->arch.model.fac_list);
222 }
223
set_kvm_facility(u64 * fac_list,unsigned long nr)224 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
225 {
226 unsigned char *ptr;
227
228 if (nr >= MAX_FACILITY_BIT)
229 return -EINVAL;
230 ptr = (unsigned char *) fac_list + (nr >> 3);
231 *ptr |= (0x80UL >> (nr & 7));
232 return 0;
233 }
234
test_kvm_cpu_feat(struct kvm * kvm,unsigned long nr)235 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
236 {
237 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
238 return test_bit_inv(nr, kvm->arch.cpu_feat);
239 }
240
241 /* are cpu states controlled by user space */
kvm_s390_user_cpu_state_ctrl(struct kvm * kvm)242 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
243 {
244 return kvm->arch.user_cpu_state_ctrl != 0;
245 }
246
kvm_s390_set_user_cpu_state_ctrl(struct kvm * kvm)247 static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm)
248 {
249 if (kvm->arch.user_cpu_state_ctrl)
250 return;
251
252 VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control");
253 kvm->arch.user_cpu_state_ctrl = 1;
254 }
255
256 /* get the end gfn of the last (highest gfn) memslot */
kvm_s390_get_gfn_end(struct kvm_memslots * slots)257 static inline unsigned long kvm_s390_get_gfn_end(struct kvm_memslots *slots)
258 {
259 struct rb_node *node;
260 struct kvm_memory_slot *ms;
261
262 if (WARN_ON(kvm_memslots_empty(slots)))
263 return 0;
264
265 node = rb_last(&slots->gfn_tree);
266 ms = container_of(node, struct kvm_memory_slot, gfn_node[slots->node_idx]);
267 return ms->base_gfn + ms->npages;
268 }
269
kvm_s390_get_gisa_desc(struct kvm * kvm)270 static inline u32 kvm_s390_get_gisa_desc(struct kvm *kvm)
271 {
272 u32 gd;
273
274 if (!kvm->arch.gisa_int.origin)
275 return 0;
276
277 gd = virt_to_phys(kvm->arch.gisa_int.origin);
278
279 if (gd && sclp.has_gisaf)
280 gd |= GISA_FORMAT1;
281 return gd;
282 }
283
gpa_to_hva(struct kvm * kvm,gpa_t gpa)284 static inline hva_t gpa_to_hva(struct kvm *kvm, gpa_t gpa)
285 {
286 hva_t hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
287
288 if (!kvm_is_error_hva(hva))
289 hva |= offset_in_page(gpa);
290 return hva;
291 }
292
293 /* implemented in pv.c */
294 int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
295 int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
296 int kvm_s390_pv_set_aside(struct kvm *kvm, u16 *rc, u16 *rrc);
297 int kvm_s390_pv_deinit_aside_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
298 int kvm_s390_pv_deinit_cleanup_all(struct kvm *kvm, u16 *rc, u16 *rrc);
299 int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
300 int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
301 int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
302 u16 *rrc);
303 int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size,
304 unsigned long tweak, u16 *rc, u16 *rrc);
305 int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state);
306 int kvm_s390_pv_dump_cpu(struct kvm_vcpu *vcpu, void *buff, u16 *rc, u16 *rrc);
307 int kvm_s390_pv_dump_stor_state(struct kvm *kvm, void __user *buff_user,
308 u64 *gaddr, u64 buff_user_len, u16 *rc, u16 *rrc);
309 int kvm_s390_pv_dump_complete(struct kvm *kvm, void __user *buff_user,
310 u16 *rc, u16 *rrc);
311 int kvm_s390_pv_destroy_page(struct kvm *kvm, unsigned long gaddr);
312 int kvm_s390_pv_convert_to_secure(struct kvm *kvm, unsigned long gaddr);
313 int kvm_s390_pv_make_secure(struct kvm *kvm, unsigned long gaddr, void *uvcb);
314
kvm_s390_pv_get_handle(struct kvm * kvm)315 static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm)
316 {
317 return kvm->arch.pv.handle;
318 }
319
kvm_s390_pv_cpu_get_handle(struct kvm_vcpu * vcpu)320 static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu)
321 {
322 return vcpu->arch.pv.handle;
323 }
324
325 /**
326 * __kvm_s390_pv_destroy_page() - Destroy a guest page.
327 * @page: the page to destroy
328 *
329 * An attempt will be made to destroy the given guest page. If the attempt
330 * fails, an attempt is made to export the page. If both attempts fail, an
331 * appropriate error is returned.
332 *
333 * Context: must be called holding the mm lock for gmap->mm
334 */
__kvm_s390_pv_destroy_page(struct page * page)335 static inline int __kvm_s390_pv_destroy_page(struct page *page)
336 {
337 struct folio *folio = page_folio(page);
338 int rc;
339
340 /* Large folios cannot be secure. Small folio implies FW_LEVEL_PTE. */
341 if (folio_test_large(folio))
342 return -EFAULT;
343
344 rc = uv_destroy_folio(folio);
345 /*
346 * Fault handlers can race; it is possible that two CPUs will fault
347 * on the same secure page. One CPU can destroy the page, reboot,
348 * re-enter secure mode and import it, while the second CPU was
349 * stuck at the beginning of the handler. At some point the second
350 * CPU will be able to progress, and it will not be able to destroy
351 * the page. In that case we do not want to terminate the process,
352 * we instead try to export the page.
353 */
354 if (rc)
355 rc = uv_convert_from_secure_folio(folio);
356
357 return rc;
358 }
359
360 /* implemented in interrupt.c */
361 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
362 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
363 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
364 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
365 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
366 void kvm_s390_clear_float_irqs(struct kvm *kvm);
367 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
368 struct kvm_s390_interrupt *s390int);
369 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
370 struct kvm_s390_irq *irq);
kvm_s390_inject_prog_irq(struct kvm_vcpu * vcpu,struct kvm_s390_pgm_info * pgm_info)371 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
372 struct kvm_s390_pgm_info *pgm_info)
373 {
374 struct kvm_s390_irq irq = {
375 .type = KVM_S390_PROGRAM_INT,
376 .u.pgm = *pgm_info,
377 };
378
379 return kvm_s390_inject_vcpu(vcpu, &irq);
380 }
kvm_s390_inject_program_int(struct kvm_vcpu * vcpu,u16 code)381 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
382 {
383 struct kvm_s390_irq irq = {
384 .type = KVM_S390_PROGRAM_INT,
385 .u.pgm.code = code,
386 };
387
388 return kvm_s390_inject_vcpu(vcpu, &irq);
389 }
390 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
391 u64 isc_mask, u32 schid);
392 int kvm_s390_reinject_io_int(struct kvm *kvm,
393 struct kvm_s390_interrupt_info *inti);
394 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
395
396 /* implemented in intercept.c */
397 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
398 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
kvm_s390_rewind_psw(struct kvm_vcpu * vcpu,int ilen)399 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
400 {
401 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
402
403 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
404 }
kvm_s390_forward_psw(struct kvm_vcpu * vcpu,int ilen)405 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
406 {
407 kvm_s390_rewind_psw(vcpu, -ilen);
408 }
kvm_s390_retry_instr(struct kvm_vcpu * vcpu)409 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
410 {
411 /* don't inject PER events if we re-execute the instruction */
412 vcpu->arch.sie_block->icptstatus &= ~0x02;
413 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
414 }
415
416 int handle_sthyi(struct kvm_vcpu *vcpu);
417
418 /* implemented in priv.c */
419 int is_valid_psw(psw_t *psw);
420 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
421 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
422 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
423 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
424 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
425 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
426 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
427 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
428 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
429 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
430 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
431
432 /* implemented in vsie.c */
433 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
434 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
435 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
436 unsigned long end);
437 void kvm_s390_vsie_init(struct kvm *kvm);
438 void kvm_s390_vsie_destroy(struct kvm *kvm);
439 int gmap_shadow_valid(struct gmap *sg, unsigned long asce, int edat_level);
440
441 /* implemented in gmap-vsie.c */
442 struct gmap *gmap_shadow(struct gmap *parent, unsigned long asce, int edat_level);
443
444 /* implemented in sigp.c */
445 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
446 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
447
448 /* implemented in kvm-s390.c */
449 int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod);
450 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
451 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
452 int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
453 int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
454 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
455 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
456 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu);
457 void exit_sie(struct kvm_vcpu *vcpu);
458 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
459 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
460 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
461 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
462 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
463 int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rc, u16 *rrc);
464 int __kvm_s390_handle_dat_fault(struct kvm_vcpu *vcpu, gfn_t gfn, gpa_t gaddr, unsigned int flags);
465 int __kvm_s390_mprotect_many(struct gmap *gmap, gpa_t gpa, u8 npages, unsigned int prot,
466 unsigned long bits);
467
kvm_s390_handle_dat_fault(struct kvm_vcpu * vcpu,gpa_t gaddr,unsigned int flags)468 static inline int kvm_s390_handle_dat_fault(struct kvm_vcpu *vcpu, gpa_t gaddr, unsigned int flags)
469 {
470 return __kvm_s390_handle_dat_fault(vcpu, gpa_to_gfn(gaddr), gaddr, flags);
471 }
472
473 /* implemented in diag.c */
474 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
475
kvm_s390_vcpu_block_all(struct kvm * kvm)476 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
477 {
478 unsigned long i;
479 struct kvm_vcpu *vcpu;
480
481 WARN_ON(!mutex_is_locked(&kvm->lock));
482 kvm_for_each_vcpu(i, vcpu, kvm)
483 kvm_s390_vcpu_block(vcpu);
484 }
485
kvm_s390_vcpu_unblock_all(struct kvm * kvm)486 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
487 {
488 unsigned long i;
489 struct kvm_vcpu *vcpu;
490
491 kvm_for_each_vcpu(i, vcpu, kvm)
492 kvm_s390_vcpu_unblock(vcpu);
493 }
494
kvm_s390_get_tod_clock_fast(struct kvm * kvm)495 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
496 {
497 u64 rc;
498
499 preempt_disable();
500 rc = get_tod_clock_fast() + kvm->arch.epoch;
501 preempt_enable();
502 return rc;
503 }
504
505 /**
506 * kvm_s390_inject_prog_cond - conditionally inject a program check
507 * @vcpu: virtual cpu
508 * @rc: original return/error code
509 *
510 * This function is supposed to be used after regular guest access functions
511 * failed, to conditionally inject a program check to a vcpu. The typical
512 * pattern would look like
513 *
514 * rc = write_guest(vcpu, addr, data, len);
515 * if (rc)
516 * return kvm_s390_inject_prog_cond(vcpu, rc);
517 *
518 * A negative return code from guest access functions implies an internal error
519 * like e.g. out of memory. In these cases no program check should be injected
520 * to the guest.
521 * A positive value implies that an exception happened while accessing a guest's
522 * memory. In this case all data belonging to the corresponding program check
523 * has been stored in vcpu->arch.pgm and can be injected with
524 * kvm_s390_inject_prog_irq().
525 *
526 * Returns: - the original @rc value if @rc was negative (internal error)
527 * - zero if @rc was already zero
528 * - zero or error code from injecting if @rc was positive
529 * (program check injected to @vcpu)
530 */
kvm_s390_inject_prog_cond(struct kvm_vcpu * vcpu,int rc)531 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
532 {
533 if (rc <= 0)
534 return rc;
535 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
536 }
537
538 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
539 struct kvm_s390_irq *s390irq);
540
541 /* implemented in interrupt.c */
542 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
543 int psw_extint_disabled(struct kvm_vcpu *vcpu);
544 void kvm_s390_destroy_adapters(struct kvm *kvm);
545 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
546 extern struct kvm_device_ops kvm_flic_ops;
547 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
548 int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu);
549 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
550 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
551 void __user *buf, int len);
552 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
553 __u8 __user *buf, int len);
554 void kvm_s390_gisa_init(struct kvm *kvm);
555 void kvm_s390_gisa_clear(struct kvm *kvm);
556 void kvm_s390_gisa_destroy(struct kvm *kvm);
557 void kvm_s390_gisa_disable(struct kvm *kvm);
558 void kvm_s390_gisa_enable(struct kvm *kvm);
559 int __init kvm_s390_gib_init(u8 nisc);
560 void kvm_s390_gib_destroy(void);
561
562 /* implemented in guestdbg.c */
563 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
564 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
565 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
566 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
567 struct kvm_guest_debug *dbg);
568 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
569 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
570 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
571 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
572
573 /* support for Basic/Extended SCA handling */
kvm_s390_get_ipte_control(struct kvm * kvm)574 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
575 {
576 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
577
578 return &sca->ipte_control;
579 }
kvm_s390_use_sca_entries(void)580 static inline int kvm_s390_use_sca_entries(void)
581 {
582 /*
583 * Without SIGP interpretation, only SRS interpretation (if available)
584 * might use the entries. By not setting the entries and keeping them
585 * invalid, hardware will not access them but intercept.
586 */
587 return sclp.has_sigpif;
588 }
589 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
590 struct mcck_volatile_info *mcck_info);
591
kvm_s390_cur_gmap_fault_is_write(void)592 static inline bool kvm_s390_cur_gmap_fault_is_write(void)
593 {
594 if (current->thread.gmap_int_code == PGM_PROTECTION)
595 return true;
596 return test_facility(75) && (current->thread.gmap_teid.fsi == TEID_FSI_STORE);
597 }
598
599 /**
600 * kvm_s390_vcpu_crypto_reset_all
601 *
602 * Reset the crypto attributes for each vcpu. This can be done while the vcpus
603 * are running as each vcpu will be removed from SIE before resetting the crypt
604 * attributes and restored to SIE afterward.
605 *
606 * Note: The kvm->lock must be held while calling this function
607 *
608 * @kvm: the KVM guest
609 */
610 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
611
612 /**
613 * kvm_s390_vcpu_pci_enable_interp
614 *
615 * Set the associated PCI attributes for each vcpu to allow for zPCI Load/Store
616 * interpretation as well as adapter interruption forwarding.
617 *
618 * @kvm: the KVM guest
619 */
620 void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm);
621
622 /**
623 * diag9c_forwarding_hz
624 *
625 * Set the maximum number of diag9c forwarding per second
626 */
627 extern unsigned int diag9c_forwarding_hz;
628
629 #endif
630