Commit | Line | Data |
---|---|---|
ba5c1e9b | 1 | /* |
a53c8fab | 2 | * handling kvm guest interrupts |
ba5c1e9b | 3 | * |
841b91c5 | 4 | * Copyright IBM Corp. 2008,2014 |
ba5c1e9b CO |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | */ | |
12 | ||
ca872302 | 13 | #include <linux/interrupt.h> |
ba5c1e9b | 14 | #include <linux/kvm_host.h> |
cbb870c8 | 15 | #include <linux/hrtimer.h> |
84223598 | 16 | #include <linux/mmu_context.h> |
3cd61299 | 17 | #include <linux/signal.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
cbb870c8 HC |
19 | #include <asm/asm-offsets.h> |
20 | #include <asm/uaccess.h> | |
ba5c1e9b CO |
21 | #include "kvm-s390.h" |
22 | #include "gaccess.h" | |
ade38c31 | 23 | #include "trace-s390.h" |
ba5c1e9b | 24 | |
d8346b7d CH |
25 | #define IOINT_SCHID_MASK 0x0000ffff |
26 | #define IOINT_SSID_MASK 0x00030000 | |
27 | #define IOINT_CSSID_MASK 0x03fc0000 | |
28 | #define IOINT_AI_MASK 0x04000000 | |
29 | ||
e029ae5b TH |
30 | static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu); |
31 | ||
d8346b7d CH |
32 | static int is_ioint(u64 type) |
33 | { | |
34 | return ((type & 0xfffe0000u) != 0xfffe0000u); | |
35 | } | |
36 | ||
3c038e6b | 37 | int psw_extint_disabled(struct kvm_vcpu *vcpu) |
ba5c1e9b CO |
38 | { |
39 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
40 | } | |
41 | ||
d8346b7d CH |
42 | static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
43 | { | |
44 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); | |
45 | } | |
46 | ||
48a3e950 CH |
47 | static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
48 | { | |
49 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); | |
50 | } | |
51 | ||
ba5c1e9b CO |
52 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
53 | { | |
54 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || | |
55 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || | |
56 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) | |
57 | return 0; | |
58 | return 1; | |
59 | } | |
60 | ||
bb78c5ec DH |
61 | static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
62 | { | |
63 | if (psw_extint_disabled(vcpu) || | |
64 | !(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
65 | return 0; | |
f71d0dc5 DH |
66 | if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
67 | /* No timer interrupts when single stepping */ | |
68 | return 0; | |
bb78c5ec DH |
69 | return 1; |
70 | } | |
71 | ||
79fd50c6 CH |
72 | static u64 int_word_to_isc_bits(u32 int_word) |
73 | { | |
74 | u8 isc = (int_word & 0x38000000) >> 27; | |
75 | ||
76 | return (0x80 >> isc) << 24; | |
77 | } | |
78 | ||
ba5c1e9b | 79 | static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu, |
180c12fb | 80 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
81 | { |
82 | switch (inti->type) { | |
7697e71f CE |
83 | case KVM_S390_INT_EXTERNAL_CALL: |
84 | if (psw_extint_disabled(vcpu)) | |
85 | return 0; | |
86 | if (vcpu->arch.sie_block->gcr[0] & 0x2000ul) | |
87 | return 1; | |
ba5c1e9b CO |
88 | case KVM_S390_INT_EMERGENCY: |
89 | if (psw_extint_disabled(vcpu)) | |
90 | return 0; | |
91 | if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) | |
92 | return 1; | |
93 | return 0; | |
e029ae5b TH |
94 | case KVM_S390_INT_CLOCK_COMP: |
95 | return ckc_interrupts_enabled(vcpu); | |
96 | case KVM_S390_INT_CPU_TIMER: | |
97 | if (psw_extint_disabled(vcpu)) | |
98 | return 0; | |
99 | if (vcpu->arch.sie_block->gcr[0] & 0x400ul) | |
100 | return 1; | |
101 | return 0; | |
ba5c1e9b | 102 | case KVM_S390_INT_SERVICE: |
3c038e6b DD |
103 | case KVM_S390_INT_PFAULT_INIT: |
104 | case KVM_S390_INT_PFAULT_DONE: | |
ba5c1e9b CO |
105 | case KVM_S390_INT_VIRTIO: |
106 | if (psw_extint_disabled(vcpu)) | |
107 | return 0; | |
108 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
109 | return 1; | |
110 | return 0; | |
111 | case KVM_S390_PROGRAM_INT: | |
112 | case KVM_S390_SIGP_STOP: | |
113 | case KVM_S390_SIGP_SET_PREFIX: | |
114 | case KVM_S390_RESTART: | |
115 | return 1; | |
48a3e950 CH |
116 | case KVM_S390_MCHK: |
117 | if (psw_mchk_disabled(vcpu)) | |
118 | return 0; | |
119 | if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14) | |
120 | return 1; | |
121 | return 0; | |
d8346b7d CH |
122 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
123 | if (psw_ioint_disabled(vcpu)) | |
124 | return 0; | |
79fd50c6 CH |
125 | if (vcpu->arch.sie_block->gcr[6] & |
126 | int_word_to_isc_bits(inti->io.io_int_word)) | |
d8346b7d CH |
127 | return 1; |
128 | return 0; | |
ba5c1e9b | 129 | default: |
d8346b7d CH |
130 | printk(KERN_WARNING "illegal interrupt type %llx\n", |
131 | inti->type); | |
ba5c1e9b CO |
132 | BUG(); |
133 | } | |
134 | return 0; | |
135 | } | |
136 | ||
137 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) | |
138 | { | |
ba5c1e9b CO |
139 | atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
140 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
141 | } | |
142 | ||
143 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
144 | { | |
ba5c1e9b CO |
145 | atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
146 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
147 | } | |
148 | ||
149 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
150 | { | |
4953919f DH |
151 | atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, |
152 | &vcpu->arch.sie_block->cpuflags); | |
ba5c1e9b | 153 | vcpu->arch.sie_block->lctl = 0x0000; |
27291e21 DH |
154 | vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
155 | ||
156 | if (guestdbg_enabled(vcpu)) { | |
157 | vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | | |
158 | LCTL_CR10 | LCTL_CR11); | |
159 | vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); | |
160 | } | |
db373861 DH |
161 | |
162 | if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP) | |
163 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
ba5c1e9b CO |
164 | } |
165 | ||
166 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
167 | { | |
168 | atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); | |
169 | } | |
170 | ||
171 | static void __set_intercept_indicator(struct kvm_vcpu *vcpu, | |
180c12fb | 172 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
173 | { |
174 | switch (inti->type) { | |
7697e71f | 175 | case KVM_S390_INT_EXTERNAL_CALL: |
ba5c1e9b CO |
176 | case KVM_S390_INT_EMERGENCY: |
177 | case KVM_S390_INT_SERVICE: | |
3c038e6b DD |
178 | case KVM_S390_INT_PFAULT_INIT: |
179 | case KVM_S390_INT_PFAULT_DONE: | |
ba5c1e9b | 180 | case KVM_S390_INT_VIRTIO: |
e029ae5b TH |
181 | case KVM_S390_INT_CLOCK_COMP: |
182 | case KVM_S390_INT_CPU_TIMER: | |
ba5c1e9b CO |
183 | if (psw_extint_disabled(vcpu)) |
184 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
185 | else | |
186 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
187 | break; | |
188 | case KVM_S390_SIGP_STOP: | |
189 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
190 | break; | |
48a3e950 CH |
191 | case KVM_S390_MCHK: |
192 | if (psw_mchk_disabled(vcpu)) | |
193 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
194 | else | |
195 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
196 | break; | |
d8346b7d CH |
197 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
198 | if (psw_ioint_disabled(vcpu)) | |
199 | __set_cpuflag(vcpu, CPUSTAT_IO_INT); | |
200 | else | |
201 | vcpu->arch.sie_block->lctl |= LCTL_CR6; | |
202 | break; | |
ba5c1e9b CO |
203 | default: |
204 | BUG(); | |
205 | } | |
206 | } | |
207 | ||
8712836b DH |
208 | static int __deliver_prog_irq(struct kvm_vcpu *vcpu, |
209 | struct kvm_s390_pgm_info *pgm_info) | |
210 | { | |
211 | const unsigned short table[] = { 2, 4, 4, 6 }; | |
212 | int rc = 0; | |
213 | ||
214 | switch (pgm_info->code & ~PGM_PER) { | |
215 | case PGM_AFX_TRANSLATION: | |
216 | case PGM_ASX_TRANSLATION: | |
217 | case PGM_EX_TRANSLATION: | |
218 | case PGM_LFX_TRANSLATION: | |
219 | case PGM_LSTE_SEQUENCE: | |
220 | case PGM_LSX_TRANSLATION: | |
221 | case PGM_LX_TRANSLATION: | |
222 | case PGM_PRIMARY_AUTHORITY: | |
223 | case PGM_SECONDARY_AUTHORITY: | |
224 | case PGM_SPACE_SWITCH: | |
225 | rc = put_guest_lc(vcpu, pgm_info->trans_exc_code, | |
226 | (u64 *)__LC_TRANS_EXC_CODE); | |
227 | break; | |
228 | case PGM_ALEN_TRANSLATION: | |
229 | case PGM_ALE_SEQUENCE: | |
230 | case PGM_ASTE_INSTANCE: | |
231 | case PGM_ASTE_SEQUENCE: | |
232 | case PGM_ASTE_VALIDITY: | |
233 | case PGM_EXTENDED_AUTHORITY: | |
234 | rc = put_guest_lc(vcpu, pgm_info->exc_access_id, | |
235 | (u8 *)__LC_EXC_ACCESS_ID); | |
236 | break; | |
237 | case PGM_ASCE_TYPE: | |
238 | case PGM_PAGE_TRANSLATION: | |
239 | case PGM_REGION_FIRST_TRANS: | |
240 | case PGM_REGION_SECOND_TRANS: | |
241 | case PGM_REGION_THIRD_TRANS: | |
242 | case PGM_SEGMENT_TRANSLATION: | |
243 | rc = put_guest_lc(vcpu, pgm_info->trans_exc_code, | |
244 | (u64 *)__LC_TRANS_EXC_CODE); | |
245 | rc |= put_guest_lc(vcpu, pgm_info->exc_access_id, | |
246 | (u8 *)__LC_EXC_ACCESS_ID); | |
247 | rc |= put_guest_lc(vcpu, pgm_info->op_access_id, | |
248 | (u8 *)__LC_OP_ACCESS_ID); | |
249 | break; | |
250 | case PGM_MONITOR: | |
251 | rc = put_guest_lc(vcpu, pgm_info->mon_class_nr, | |
252 | (u64 *)__LC_MON_CLASS_NR); | |
253 | rc |= put_guest_lc(vcpu, pgm_info->mon_code, | |
254 | (u64 *)__LC_MON_CODE); | |
255 | break; | |
256 | case PGM_DATA: | |
257 | rc = put_guest_lc(vcpu, pgm_info->data_exc_code, | |
258 | (u32 *)__LC_DATA_EXC_CODE); | |
259 | break; | |
260 | case PGM_PROTECTION: | |
261 | rc = put_guest_lc(vcpu, pgm_info->trans_exc_code, | |
262 | (u64 *)__LC_TRANS_EXC_CODE); | |
263 | rc |= put_guest_lc(vcpu, pgm_info->exc_access_id, | |
264 | (u8 *)__LC_EXC_ACCESS_ID); | |
265 | break; | |
266 | } | |
267 | ||
268 | if (pgm_info->code & PGM_PER) { | |
269 | rc |= put_guest_lc(vcpu, pgm_info->per_code, | |
270 | (u8 *) __LC_PER_CODE); | |
271 | rc |= put_guest_lc(vcpu, pgm_info->per_atmid, | |
272 | (u8 *)__LC_PER_ATMID); | |
273 | rc |= put_guest_lc(vcpu, pgm_info->per_address, | |
274 | (u64 *) __LC_PER_ADDRESS); | |
275 | rc |= put_guest_lc(vcpu, pgm_info->per_access_id, | |
276 | (u8 *) __LC_PER_ACCESS_ID); | |
277 | } | |
278 | ||
279 | switch (vcpu->arch.sie_block->icptcode) { | |
280 | case ICPT_INST: | |
281 | case ICPT_INSTPROGI: | |
282 | case ICPT_OPEREXC: | |
283 | case ICPT_PARTEXEC: | |
284 | case ICPT_IOINST: | |
285 | /* last instruction only stored for these icptcodes */ | |
286 | rc |= put_guest_lc(vcpu, table[vcpu->arch.sie_block->ipa >> 14], | |
287 | (u16 *) __LC_PGM_ILC); | |
288 | break; | |
289 | case ICPT_PROGI: | |
290 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->pgmilc, | |
291 | (u16 *) __LC_PGM_ILC); | |
292 | break; | |
293 | default: | |
294 | rc |= put_guest_lc(vcpu, 0, | |
295 | (u16 *) __LC_PGM_ILC); | |
296 | } | |
297 | ||
298 | rc |= put_guest_lc(vcpu, pgm_info->code, | |
299 | (u16 *)__LC_PGM_INT_CODE); | |
300 | rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, | |
301 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
302 | rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, | |
303 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
304 | ||
305 | return rc; | |
306 | } | |
307 | ||
ba5c1e9b | 308 | static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, |
180c12fb | 309 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
310 | { |
311 | const unsigned short table[] = { 2, 4, 4, 6 }; | |
dc5008b9 | 312 | int rc = 0; |
ba5c1e9b CO |
313 | |
314 | switch (inti->type) { | |
315 | case KVM_S390_INT_EMERGENCY: | |
316 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); | |
317 | vcpu->stat.deliver_emergency_signal++; | |
ade38c31 CH |
318 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
319 | inti->emerg.code, 0); | |
1a03b764 JF |
320 | rc = put_guest_lc(vcpu, 0x1201, (u16 *)__LC_EXT_INT_CODE); |
321 | rc |= put_guest_lc(vcpu, inti->emerg.code, | |
322 | (u16 *)__LC_EXT_CPU_ADDR); | |
323 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
324 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
325 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
dc5008b9 | 326 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
ba5c1e9b | 327 | break; |
7697e71f CE |
328 | case KVM_S390_INT_EXTERNAL_CALL: |
329 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call"); | |
330 | vcpu->stat.deliver_external_call++; | |
ade38c31 CH |
331 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
332 | inti->extcall.code, 0); | |
1a03b764 JF |
333 | rc = put_guest_lc(vcpu, 0x1202, (u16 *)__LC_EXT_INT_CODE); |
334 | rc |= put_guest_lc(vcpu, inti->extcall.code, | |
335 | (u16 *)__LC_EXT_CPU_ADDR); | |
336 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
337 | &vcpu->arch.sie_block->gpsw, | |
338 | sizeof(psw_t)); | |
339 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
340 | &vcpu->arch.sie_block->gpsw, | |
341 | sizeof(psw_t)); | |
7697e71f | 342 | break; |
e029ae5b TH |
343 | case KVM_S390_INT_CLOCK_COMP: |
344 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
345 | inti->ext.ext_params, 0); | |
346 | deliver_ckc_interrupt(vcpu); | |
347 | break; | |
348 | case KVM_S390_INT_CPU_TIMER: | |
349 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
350 | inti->ext.ext_params, 0); | |
351 | rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, | |
352 | (u16 *)__LC_EXT_INT_CODE); | |
353 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
354 | &vcpu->arch.sie_block->gpsw, | |
355 | sizeof(psw_t)); | |
356 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
357 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
358 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
359 | (u32 *)__LC_EXT_PARAMS); | |
360 | break; | |
ba5c1e9b CO |
361 | case KVM_S390_INT_SERVICE: |
362 | VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", | |
363 | inti->ext.ext_params); | |
364 | vcpu->stat.deliver_service_signal++; | |
ade38c31 CH |
365 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
366 | inti->ext.ext_params, 0); | |
7988276d HC |
367 | rc = put_guest_lc(vcpu, 0x2401, (u16 *)__LC_EXT_INT_CODE); |
368 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
369 | &vcpu->arch.sie_block->gpsw, | |
370 | sizeof(psw_t)); | |
371 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
dc5008b9 | 372 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
7988276d HC |
373 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, |
374 | (u32 *)__LC_EXT_PARAMS); | |
ba5c1e9b | 375 | break; |
3c038e6b DD |
376 | case KVM_S390_INT_PFAULT_INIT: |
377 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0, | |
378 | inti->ext.ext_params2); | |
1a03b764 JF |
379 | rc = put_guest_lc(vcpu, 0x2603, (u16 *) __LC_EXT_INT_CODE); |
380 | rc |= put_guest_lc(vcpu, 0x0600, (u16 *) __LC_EXT_CPU_ADDR); | |
381 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
382 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
3c038e6b | 384 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
1a03b764 JF |
385 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, |
386 | (u64 *) __LC_EXT_PARAMS2); | |
3c038e6b DD |
387 | break; |
388 | case KVM_S390_INT_PFAULT_DONE: | |
389 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0, | |
390 | inti->ext.ext_params2); | |
7988276d HC |
391 | rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE); |
392 | rc |= put_guest_lc(vcpu, 0x0680, (u16 *)__LC_EXT_CPU_ADDR); | |
393 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
394 | &vcpu->arch.sie_block->gpsw, | |
395 | sizeof(psw_t)); | |
396 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
3c038e6b | 397 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
7988276d HC |
398 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, |
399 | (u64 *)__LC_EXT_PARAMS2); | |
3c038e6b | 400 | break; |
ba5c1e9b | 401 | case KVM_S390_INT_VIRTIO: |
33e19115 | 402 | VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx", |
ba5c1e9b CO |
403 | inti->ext.ext_params, inti->ext.ext_params2); |
404 | vcpu->stat.deliver_virtio_interrupt++; | |
ade38c31 CH |
405 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
406 | inti->ext.ext_params, | |
407 | inti->ext.ext_params2); | |
7988276d HC |
408 | rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE); |
409 | rc |= put_guest_lc(vcpu, 0x0d00, (u16 *)__LC_EXT_CPU_ADDR); | |
410 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
411 | &vcpu->arch.sie_block->gpsw, | |
412 | sizeof(psw_t)); | |
413 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
dc5008b9 | 414 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
7988276d HC |
415 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, |
416 | (u32 *)__LC_EXT_PARAMS); | |
417 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
418 | (u64 *)__LC_EXT_PARAMS2); | |
ba5c1e9b | 419 | break; |
ba5c1e9b CO |
420 | case KVM_S390_SIGP_STOP: |
421 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop"); | |
422 | vcpu->stat.deliver_stop_signal++; | |
ade38c31 CH |
423 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
424 | 0, 0); | |
ba5c1e9b CO |
425 | __set_intercept_indicator(vcpu, inti); |
426 | break; | |
427 | ||
428 | case KVM_S390_SIGP_SET_PREFIX: | |
429 | VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", | |
430 | inti->prefix.address); | |
431 | vcpu->stat.deliver_prefix_signal++; | |
ade38c31 CH |
432 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
433 | inti->prefix.address, 0); | |
8d26cf7b | 434 | kvm_s390_set_prefix(vcpu, inti->prefix.address); |
ba5c1e9b CO |
435 | break; |
436 | ||
437 | case KVM_S390_RESTART: | |
438 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); | |
439 | vcpu->stat.deliver_restart_signal++; | |
ade38c31 CH |
440 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
441 | 0, 0); | |
1a03b764 JF |
442 | rc = write_guest_lc(vcpu, |
443 | offsetof(struct _lowcore, restart_old_psw), | |
444 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
445 | rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw), | |
446 | &vcpu->arch.sie_block->gpsw, | |
447 | sizeof(psw_t)); | |
ba5c1e9b | 448 | break; |
ba5c1e9b CO |
449 | case KVM_S390_PROGRAM_INT: |
450 | VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", | |
451 | inti->pgm.code, | |
452 | table[vcpu->arch.sie_block->ipa >> 14]); | |
453 | vcpu->stat.deliver_program_int++; | |
ade38c31 CH |
454 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, |
455 | inti->pgm.code, 0); | |
8712836b | 456 | rc = __deliver_prog_irq(vcpu, &inti->pgm); |
ba5c1e9b CO |
457 | break; |
458 | ||
48a3e950 CH |
459 | case KVM_S390_MCHK: |
460 | VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx", | |
461 | inti->mchk.mcic); | |
462 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
463 | inti->mchk.cr14, | |
464 | inti->mchk.mcic); | |
dc5008b9 HC |
465 | rc = kvm_s390_vcpu_store_status(vcpu, |
466 | KVM_S390_STORE_STATUS_PREFIXED); | |
7988276d HC |
467 | rc |= put_guest_lc(vcpu, inti->mchk.mcic, (u64 *)__LC_MCCK_CODE); |
468 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, | |
469 | &vcpu->arch.sie_block->gpsw, | |
470 | sizeof(psw_t)); | |
471 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
dc5008b9 | 472 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
48a3e950 CH |
473 | break; |
474 | ||
d8346b7d CH |
475 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
476 | { | |
477 | __u32 param0 = ((__u32)inti->io.subchannel_id << 16) | | |
478 | inti->io.subchannel_nr; | |
479 | __u64 param1 = ((__u64)inti->io.io_int_parm << 32) | | |
480 | inti->io.io_int_word; | |
481 | VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type); | |
482 | vcpu->stat.deliver_io_int++; | |
483 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
484 | param0, param1); | |
7988276d HC |
485 | rc = put_guest_lc(vcpu, inti->io.subchannel_id, |
486 | (u16 *)__LC_SUBCHANNEL_ID); | |
487 | rc |= put_guest_lc(vcpu, inti->io.subchannel_nr, | |
488 | (u16 *)__LC_SUBCHANNEL_NR); | |
489 | rc |= put_guest_lc(vcpu, inti->io.io_int_parm, | |
490 | (u32 *)__LC_IO_INT_PARM); | |
491 | rc |= put_guest_lc(vcpu, inti->io.io_int_word, | |
492 | (u32 *)__LC_IO_INT_WORD); | |
493 | rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, | |
494 | &vcpu->arch.sie_block->gpsw, | |
495 | sizeof(psw_t)); | |
496 | rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, | |
497 | &vcpu->arch.sie_block->gpsw, | |
498 | sizeof(psw_t)); | |
d8346b7d CH |
499 | break; |
500 | } | |
ba5c1e9b CO |
501 | default: |
502 | BUG(); | |
503 | } | |
dc5008b9 | 504 | if (rc) { |
3cd61299 | 505 | printk("kvm: The guest lowcore is not mapped during interrupt " |
dc5008b9 | 506 | "delivery, killing userspace\n"); |
3cd61299 | 507 | do_exit(SIGKILL); |
ba5c1e9b CO |
508 | } |
509 | } | |
510 | ||
bb78c5ec | 511 | static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu) |
ba5c1e9b | 512 | { |
dc5008b9 | 513 | int rc; |
ba5c1e9b | 514 | |
1a03b764 JF |
515 | rc = put_guest_lc(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE); |
516 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
517 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
518 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
519 | &vcpu->arch.sie_block->gpsw, | |
520 | sizeof(psw_t)); | |
dc5008b9 | 521 | if (rc) { |
3cd61299 CB |
522 | printk("kvm: The guest lowcore is not mapped during interrupt " |
523 | "delivery, killing userspace\n"); | |
524 | do_exit(SIGKILL); | |
ba5c1e9b | 525 | } |
ba5c1e9b CO |
526 | } |
527 | ||
4953919f DH |
528 | /* Check whether SIGP interpretation facility has an external call pending */ |
529 | int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu) | |
530 | { | |
531 | atomic_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl; | |
532 | ||
533 | if (!psw_extint_disabled(vcpu) && | |
534 | (vcpu->arch.sie_block->gcr[0] & 0x2000ul) && | |
535 | (atomic_read(sigp_ctrl) & SIGP_CTRL_C) && | |
536 | (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND)) | |
537 | return 1; | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
3c038e6b | 542 | int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) |
ba5c1e9b | 543 | { |
180c12fb CB |
544 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
545 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
546 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
547 | int rc = 0; |
548 | ||
549 | if (atomic_read(&li->active)) { | |
4ae3c081 | 550 | spin_lock(&li->lock); |
ba5c1e9b CO |
551 | list_for_each_entry(inti, &li->list, list) |
552 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
553 | rc = 1; | |
554 | break; | |
555 | } | |
4ae3c081 | 556 | spin_unlock(&li->lock); |
ba5c1e9b CO |
557 | } |
558 | ||
559 | if ((!rc) && atomic_read(&fi->active)) { | |
b037a4f3 | 560 | spin_lock(&fi->lock); |
ba5c1e9b CO |
561 | list_for_each_entry(inti, &fi->list, list) |
562 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
563 | rc = 1; | |
564 | break; | |
565 | } | |
b037a4f3 | 566 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
567 | } |
568 | ||
bb78c5ec DH |
569 | if (!rc && kvm_cpu_has_pending_timer(vcpu)) |
570 | rc = 1; | |
ba5c1e9b | 571 | |
4953919f DH |
572 | if (!rc && kvm_s390_si_ext_call_pending(vcpu)) |
573 | rc = 1; | |
574 | ||
ba5c1e9b CO |
575 | return rc; |
576 | } | |
577 | ||
3d80840d MT |
578 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
579 | { | |
bb78c5ec DH |
580 | if (!(vcpu->arch.sie_block->ckc < |
581 | get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) | |
582 | return 0; | |
583 | if (!ckc_interrupts_enabled(vcpu)) | |
584 | return 0; | |
585 | return 1; | |
3d80840d MT |
586 | } |
587 | ||
ba5c1e9b CO |
588 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
589 | { | |
590 | u64 now, sltime; | |
ba5c1e9b CO |
591 | |
592 | vcpu->stat.exit_wait_state++; | |
ba5c1e9b | 593 | |
0759d068 DH |
594 | /* fast path */ |
595 | if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu)) | |
596 | return 0; | |
e52b2af5 | 597 | |
ba5c1e9b CO |
598 | if (psw_interrupts_disabled(vcpu)) { |
599 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
b8e660b8 | 600 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
601 | } |
602 | ||
0759d068 | 603 | __set_cpu_idle(vcpu); |
bb78c5ec | 604 | if (!ckc_interrupts_enabled(vcpu)) { |
ba5c1e9b CO |
605 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
606 | goto no_timer; | |
607 | } | |
608 | ||
8c071b0f | 609 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
ed4f2094 | 610 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); |
ca872302 CB |
611 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
612 | VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime); | |
ba5c1e9b | 613 | no_timer: |
800c1065 | 614 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
0759d068 | 615 | kvm_vcpu_block(vcpu); |
ba5c1e9b | 616 | __unset_cpu_idle(vcpu); |
800c1065 TH |
617 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
618 | ||
ca872302 | 619 | hrtimer_try_to_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
620 | return 0; |
621 | } | |
622 | ||
0e9c85a5 DH |
623 | void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
624 | { | |
625 | if (waitqueue_active(&vcpu->wq)) { | |
626 | /* | |
627 | * The vcpu gave up the cpu voluntarily, mark it as a good | |
628 | * yield-candidate. | |
629 | */ | |
630 | vcpu->preempted = true; | |
631 | wake_up_interruptible(&vcpu->wq); | |
632 | } | |
633 | } | |
634 | ||
ca872302 CB |
635 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
636 | { | |
637 | struct kvm_vcpu *vcpu; | |
638 | ||
639 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
ea74c0ea | 640 | kvm_s390_vcpu_wakeup(vcpu); |
ca872302 CB |
641 | |
642 | return HRTIMER_NORESTART; | |
643 | } | |
ba5c1e9b | 644 | |
2ed10cc1 JF |
645 | void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
646 | { | |
647 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
648 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
649 | ||
4ae3c081 | 650 | spin_lock(&li->lock); |
2ed10cc1 JF |
651 | list_for_each_entry_safe(inti, n, &li->list, list) { |
652 | list_del(&inti->list); | |
653 | kfree(inti); | |
654 | } | |
655 | atomic_set(&li->active, 0); | |
4ae3c081 | 656 | spin_unlock(&li->lock); |
4953919f DH |
657 | |
658 | /* clear pending external calls set by sigp interpretation facility */ | |
659 | atomic_clear_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags); | |
660 | atomic_clear_mask(SIGP_CTRL_C, | |
661 | &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl); | |
2ed10cc1 JF |
662 | } |
663 | ||
ba5c1e9b CO |
664 | void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
665 | { | |
180c12fb CB |
666 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
667 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
668 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
ba5c1e9b CO |
669 | int deliver; |
670 | ||
671 | __reset_intercept_indicators(vcpu); | |
672 | if (atomic_read(&li->active)) { | |
673 | do { | |
674 | deliver = 0; | |
4ae3c081 | 675 | spin_lock(&li->lock); |
ba5c1e9b CO |
676 | list_for_each_entry_safe(inti, n, &li->list, list) { |
677 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
678 | list_del(&inti->list); | |
679 | deliver = 1; | |
680 | break; | |
681 | } | |
682 | __set_intercept_indicator(vcpu, inti); | |
683 | } | |
684 | if (list_empty(&li->list)) | |
685 | atomic_set(&li->active, 0); | |
4ae3c081 | 686 | spin_unlock(&li->lock); |
ba5c1e9b CO |
687 | if (deliver) { |
688 | __do_deliver_interrupt(vcpu, inti); | |
689 | kfree(inti); | |
690 | } | |
691 | } while (deliver); | |
692 | } | |
693 | ||
bb78c5ec DH |
694 | if (kvm_cpu_has_pending_timer(vcpu)) |
695 | deliver_ckc_interrupt(vcpu); | |
ba5c1e9b CO |
696 | |
697 | if (atomic_read(&fi->active)) { | |
698 | do { | |
699 | deliver = 0; | |
b037a4f3 | 700 | spin_lock(&fi->lock); |
ba5c1e9b CO |
701 | list_for_each_entry_safe(inti, n, &fi->list, list) { |
702 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
703 | list_del(&inti->list); | |
a91b8ebe | 704 | fi->irq_count--; |
ba5c1e9b CO |
705 | deliver = 1; |
706 | break; | |
707 | } | |
708 | __set_intercept_indicator(vcpu, inti); | |
709 | } | |
710 | if (list_empty(&fi->list)) | |
711 | atomic_set(&fi->active, 0); | |
b037a4f3 | 712 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
713 | if (deliver) { |
714 | __do_deliver_interrupt(vcpu, inti); | |
715 | kfree(inti); | |
716 | } | |
717 | } while (deliver); | |
718 | } | |
719 | } | |
720 | ||
48a3e950 CH |
721 | void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu) |
722 | { | |
723 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
724 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
725 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
726 | int deliver; | |
727 | ||
728 | __reset_intercept_indicators(vcpu); | |
729 | if (atomic_read(&li->active)) { | |
730 | do { | |
731 | deliver = 0; | |
4ae3c081 | 732 | spin_lock(&li->lock); |
48a3e950 CH |
733 | list_for_each_entry_safe(inti, n, &li->list, list) { |
734 | if ((inti->type == KVM_S390_MCHK) && | |
735 | __interrupt_is_deliverable(vcpu, inti)) { | |
736 | list_del(&inti->list); | |
737 | deliver = 1; | |
738 | break; | |
739 | } | |
740 | __set_intercept_indicator(vcpu, inti); | |
741 | } | |
742 | if (list_empty(&li->list)) | |
743 | atomic_set(&li->active, 0); | |
4ae3c081 | 744 | spin_unlock(&li->lock); |
48a3e950 CH |
745 | if (deliver) { |
746 | __do_deliver_interrupt(vcpu, inti); | |
747 | kfree(inti); | |
748 | } | |
749 | } while (deliver); | |
750 | } | |
751 | ||
752 | if (atomic_read(&fi->active)) { | |
753 | do { | |
754 | deliver = 0; | |
755 | spin_lock(&fi->lock); | |
756 | list_for_each_entry_safe(inti, n, &fi->list, list) { | |
757 | if ((inti->type == KVM_S390_MCHK) && | |
758 | __interrupt_is_deliverable(vcpu, inti)) { | |
759 | list_del(&inti->list); | |
a91b8ebe | 760 | fi->irq_count--; |
48a3e950 CH |
761 | deliver = 1; |
762 | break; | |
763 | } | |
764 | __set_intercept_indicator(vcpu, inti); | |
765 | } | |
766 | if (list_empty(&fi->list)) | |
767 | atomic_set(&fi->active, 0); | |
768 | spin_unlock(&fi->lock); | |
769 | if (deliver) { | |
770 | __do_deliver_interrupt(vcpu, inti); | |
771 | kfree(inti); | |
772 | } | |
773 | } while (deliver); | |
774 | } | |
775 | } | |
776 | ||
ba5c1e9b CO |
777 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) |
778 | { | |
180c12fb CB |
779 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
780 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
781 | |
782 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
783 | if (!inti) | |
784 | return -ENOMEM; | |
785 | ||
a419aef8 | 786 | inti->type = KVM_S390_PROGRAM_INT; |
ba5c1e9b CO |
787 | inti->pgm.code = code; |
788 | ||
789 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); | |
ade38c31 | 790 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, inti->type, code, 0, 1); |
4ae3c081 | 791 | spin_lock(&li->lock); |
ba5c1e9b CO |
792 | list_add(&inti->list, &li->list); |
793 | atomic_set(&li->active, 1); | |
d0321a24 | 794 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 795 | spin_unlock(&li->lock); |
bcd84683 JF |
796 | return 0; |
797 | } | |
798 | ||
799 | int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, | |
800 | struct kvm_s390_pgm_info *pgm_info) | |
801 | { | |
802 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
803 | struct kvm_s390_interrupt_info *inti; | |
804 | ||
805 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
806 | if (!inti) | |
807 | return -ENOMEM; | |
808 | ||
809 | VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)", | |
810 | pgm_info->code); | |
811 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
812 | pgm_info->code, 0, 1); | |
813 | ||
814 | inti->type = KVM_S390_PROGRAM_INT; | |
815 | memcpy(&inti->pgm, pgm_info, sizeof(inti->pgm)); | |
4ae3c081 | 816 | spin_lock(&li->lock); |
bcd84683 JF |
817 | list_add(&inti->list, &li->list); |
818 | atomic_set(&li->active, 1); | |
819 | BUG_ON(waitqueue_active(li->wq)); | |
4ae3c081 | 820 | spin_unlock(&li->lock); |
ba5c1e9b CO |
821 | return 0; |
822 | } | |
823 | ||
fa6b7fe9 CH |
824 | struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
825 | u64 cr6, u64 schid) | |
826 | { | |
827 | struct kvm_s390_float_interrupt *fi; | |
828 | struct kvm_s390_interrupt_info *inti, *iter; | |
829 | ||
830 | if ((!schid && !cr6) || (schid && cr6)) | |
831 | return NULL; | |
832 | mutex_lock(&kvm->lock); | |
833 | fi = &kvm->arch.float_int; | |
834 | spin_lock(&fi->lock); | |
835 | inti = NULL; | |
836 | list_for_each_entry(iter, &fi->list, list) { | |
837 | if (!is_ioint(iter->type)) | |
838 | continue; | |
79fd50c6 CH |
839 | if (cr6 && |
840 | ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0)) | |
fa6b7fe9 CH |
841 | continue; |
842 | if (schid) { | |
843 | if (((schid & 0x00000000ffff0000) >> 16) != | |
844 | iter->io.subchannel_id) | |
845 | continue; | |
846 | if ((schid & 0x000000000000ffff) != | |
847 | iter->io.subchannel_nr) | |
848 | continue; | |
849 | } | |
850 | inti = iter; | |
851 | break; | |
852 | } | |
a91b8ebe | 853 | if (inti) { |
fa6b7fe9 | 854 | list_del_init(&inti->list); |
a91b8ebe JF |
855 | fi->irq_count--; |
856 | } | |
fa6b7fe9 CH |
857 | if (list_empty(&fi->list)) |
858 | atomic_set(&fi->active, 0); | |
859 | spin_unlock(&fi->lock); | |
860 | mutex_unlock(&kvm->lock); | |
861 | return inti; | |
862 | } | |
ba5c1e9b | 863 | |
a91b8ebe | 864 | static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) |
ba5c1e9b | 865 | { |
180c12fb CB |
866 | struct kvm_s390_local_interrupt *li; |
867 | struct kvm_s390_float_interrupt *fi; | |
c05c4186 | 868 | struct kvm_s390_interrupt_info *iter; |
1ee0bc55 | 869 | struct kvm_vcpu *dst_vcpu = NULL; |
ba5c1e9b | 870 | int sigcpu; |
a91b8ebe | 871 | int rc = 0; |
ba5c1e9b | 872 | |
c05c4186 JF |
873 | mutex_lock(&kvm->lock); |
874 | fi = &kvm->arch.float_int; | |
875 | spin_lock(&fi->lock); | |
a91b8ebe JF |
876 | if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) { |
877 | rc = -EINVAL; | |
878 | goto unlock_fi; | |
879 | } | |
880 | fi->irq_count++; | |
c05c4186 JF |
881 | if (!is_ioint(inti->type)) { |
882 | list_add_tail(&inti->list, &fi->list); | |
883 | } else { | |
884 | u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word); | |
885 | ||
886 | /* Keep I/O interrupts sorted in isc order. */ | |
887 | list_for_each_entry(iter, &fi->list, list) { | |
888 | if (!is_ioint(iter->type)) | |
889 | continue; | |
890 | if (int_word_to_isc_bits(iter->io.io_int_word) | |
891 | <= isc_bits) | |
892 | continue; | |
893 | break; | |
894 | } | |
895 | list_add_tail(&inti->list, &iter->list); | |
896 | } | |
897 | atomic_set(&fi->active, 1); | |
898 | sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); | |
899 | if (sigcpu == KVM_MAX_VCPUS) { | |
900 | do { | |
901 | sigcpu = fi->next_rr_cpu++; | |
902 | if (sigcpu == KVM_MAX_VCPUS) | |
903 | sigcpu = fi->next_rr_cpu = 0; | |
1ee0bc55 | 904 | } while (kvm_get_vcpu(kvm, sigcpu) == NULL); |
c05c4186 | 905 | } |
1ee0bc55 JF |
906 | dst_vcpu = kvm_get_vcpu(kvm, sigcpu); |
907 | li = &dst_vcpu->arch.local_int; | |
4ae3c081 | 908 | spin_lock(&li->lock); |
c05c4186 | 909 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
4ae3c081 | 910 | spin_unlock(&li->lock); |
0e9c85a5 | 911 | kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu)); |
a91b8ebe | 912 | unlock_fi: |
c05c4186 JF |
913 | spin_unlock(&fi->lock); |
914 | mutex_unlock(&kvm->lock); | |
a91b8ebe | 915 | return rc; |
c05c4186 JF |
916 | } |
917 | ||
918 | int kvm_s390_inject_vm(struct kvm *kvm, | |
919 | struct kvm_s390_interrupt *s390int) | |
920 | { | |
921 | struct kvm_s390_interrupt_info *inti; | |
922 | ||
ba5c1e9b CO |
923 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
924 | if (!inti) | |
925 | return -ENOMEM; | |
926 | ||
c05c4186 JF |
927 | inti->type = s390int->type; |
928 | switch (inti->type) { | |
ba5c1e9b | 929 | case KVM_S390_INT_VIRTIO: |
33e19115 | 930 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b | 931 | s390int->parm, s390int->parm64); |
ba5c1e9b CO |
932 | inti->ext.ext_params = s390int->parm; |
933 | inti->ext.ext_params2 = s390int->parm64; | |
934 | break; | |
935 | case KVM_S390_INT_SERVICE: | |
936 | VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); | |
ba5c1e9b CO |
937 | inti->ext.ext_params = s390int->parm; |
938 | break; | |
3c038e6b DD |
939 | case KVM_S390_INT_PFAULT_DONE: |
940 | inti->type = s390int->type; | |
941 | inti->ext.ext_params2 = s390int->parm64; | |
942 | break; | |
48a3e950 CH |
943 | case KVM_S390_MCHK: |
944 | VM_EVENT(kvm, 5, "inject: machine check parm64:%llx", | |
945 | s390int->parm64); | |
48a3e950 CH |
946 | inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
947 | inti->mchk.mcic = s390int->parm64; | |
948 | break; | |
d8346b7d | 949 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
c05c4186 | 950 | if (inti->type & IOINT_AI_MASK) |
d8346b7d CH |
951 | VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)"); |
952 | else | |
953 | VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x", | |
954 | s390int->type & IOINT_CSSID_MASK, | |
955 | s390int->type & IOINT_SSID_MASK, | |
956 | s390int->type & IOINT_SCHID_MASK); | |
d8346b7d CH |
957 | inti->io.subchannel_id = s390int->parm >> 16; |
958 | inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; | |
959 | inti->io.io_int_parm = s390int->parm64 >> 32; | |
960 | inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; | |
961 | break; | |
ba5c1e9b CO |
962 | default: |
963 | kfree(inti); | |
964 | return -EINVAL; | |
965 | } | |
ade38c31 CH |
966 | trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
967 | 2); | |
ba5c1e9b | 968 | |
a91b8ebe | 969 | return __inject_vm(kvm, inti); |
ba5c1e9b CO |
970 | } |
971 | ||
2f32d4ea CH |
972 | void kvm_s390_reinject_io_int(struct kvm *kvm, |
973 | struct kvm_s390_interrupt_info *inti) | |
974 | { | |
975 | __inject_vm(kvm, inti); | |
976 | } | |
977 | ||
ba5c1e9b CO |
978 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, |
979 | struct kvm_s390_interrupt *s390int) | |
980 | { | |
180c12fb CB |
981 | struct kvm_s390_local_interrupt *li; |
982 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
983 | |
984 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
985 | if (!inti) | |
986 | return -ENOMEM; | |
987 | ||
988 | switch (s390int->type) { | |
989 | case KVM_S390_PROGRAM_INT: | |
990 | if (s390int->parm & 0xffff0000) { | |
991 | kfree(inti); | |
992 | return -EINVAL; | |
993 | } | |
994 | inti->type = s390int->type; | |
995 | inti->pgm.code = s390int->parm; | |
996 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", | |
997 | s390int->parm); | |
998 | break; | |
b7e6e4d3 CB |
999 | case KVM_S390_SIGP_SET_PREFIX: |
1000 | inti->prefix.address = s390int->parm; | |
1001 | inti->type = s390int->type; | |
1002 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)", | |
1003 | s390int->parm); | |
1004 | break; | |
ba5c1e9b CO |
1005 | case KVM_S390_SIGP_STOP: |
1006 | case KVM_S390_RESTART: | |
e029ae5b TH |
1007 | case KVM_S390_INT_CLOCK_COMP: |
1008 | case KVM_S390_INT_CPU_TIMER: | |
82a12737 JH |
1009 | VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); |
1010 | inti->type = s390int->type; | |
1011 | break; | |
7697e71f | 1012 | case KVM_S390_INT_EXTERNAL_CALL: |
82a12737 JH |
1013 | if (s390int->parm & 0xffff0000) { |
1014 | kfree(inti); | |
1015 | return -EINVAL; | |
1016 | } | |
1017 | VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u", | |
1018 | s390int->parm); | |
1019 | inti->type = s390int->type; | |
1020 | inti->extcall.code = s390int->parm; | |
1021 | break; | |
ba5c1e9b | 1022 | case KVM_S390_INT_EMERGENCY: |
82a12737 JH |
1023 | if (s390int->parm & 0xffff0000) { |
1024 | kfree(inti); | |
1025 | return -EINVAL; | |
1026 | } | |
1027 | VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm); | |
ba5c1e9b | 1028 | inti->type = s390int->type; |
82a12737 | 1029 | inti->emerg.code = s390int->parm; |
ba5c1e9b | 1030 | break; |
48a3e950 CH |
1031 | case KVM_S390_MCHK: |
1032 | VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx", | |
1033 | s390int->parm64); | |
1034 | inti->type = s390int->type; | |
1035 | inti->mchk.mcic = s390int->parm64; | |
1036 | break; | |
3c038e6b DD |
1037 | case KVM_S390_INT_PFAULT_INIT: |
1038 | inti->type = s390int->type; | |
1039 | inti->ext.ext_params2 = s390int->parm64; | |
1040 | break; | |
ba5c1e9b CO |
1041 | case KVM_S390_INT_VIRTIO: |
1042 | case KVM_S390_INT_SERVICE: | |
d8346b7d | 1043 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
ba5c1e9b CO |
1044 | default: |
1045 | kfree(inti); | |
1046 | return -EINVAL; | |
1047 | } | |
ade38c31 CH |
1048 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm, |
1049 | s390int->parm64, 2); | |
ba5c1e9b CO |
1050 | |
1051 | mutex_lock(&vcpu->kvm->lock); | |
1052 | li = &vcpu->arch.local_int; | |
4ae3c081 | 1053 | spin_lock(&li->lock); |
ba5c1e9b CO |
1054 | if (inti->type == KVM_S390_PROGRAM_INT) |
1055 | list_add(&inti->list, &li->list); | |
1056 | else | |
1057 | list_add_tail(&inti->list, &li->list); | |
1058 | atomic_set(&li->active, 1); | |
1059 | if (inti->type == KVM_S390_SIGP_STOP) | |
1060 | li->action_bits |= ACTION_STOP_ON_STOP; | |
1061 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
4ae3c081 | 1062 | spin_unlock(&li->lock); |
ba5c1e9b | 1063 | mutex_unlock(&vcpu->kvm->lock); |
0e9c85a5 | 1064 | kvm_s390_vcpu_wakeup(vcpu); |
ba5c1e9b CO |
1065 | return 0; |
1066 | } | |
c05c4186 | 1067 | |
67335e63 | 1068 | void kvm_s390_clear_float_irqs(struct kvm *kvm) |
c05c4186 JF |
1069 | { |
1070 | struct kvm_s390_float_interrupt *fi; | |
1071 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
1072 | ||
1073 | mutex_lock(&kvm->lock); | |
1074 | fi = &kvm->arch.float_int; | |
1075 | spin_lock(&fi->lock); | |
1076 | list_for_each_entry_safe(inti, n, &fi->list, list) { | |
1077 | list_del(&inti->list); | |
1078 | kfree(inti); | |
1079 | } | |
a91b8ebe | 1080 | fi->irq_count = 0; |
c05c4186 JF |
1081 | atomic_set(&fi->active, 0); |
1082 | spin_unlock(&fi->lock); | |
1083 | mutex_unlock(&kvm->lock); | |
1084 | } | |
1085 | ||
1086 | static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti, | |
1087 | u8 *addr) | |
1088 | { | |
1089 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1090 | struct kvm_s390_irq irq = {0}; | |
1091 | ||
1092 | irq.type = inti->type; | |
1093 | switch (inti->type) { | |
3c038e6b DD |
1094 | case KVM_S390_INT_PFAULT_INIT: |
1095 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1096 | case KVM_S390_INT_VIRTIO: |
1097 | case KVM_S390_INT_SERVICE: | |
1098 | irq.u.ext = inti->ext; | |
1099 | break; | |
1100 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1101 | irq.u.io = inti->io; | |
1102 | break; | |
1103 | case KVM_S390_MCHK: | |
1104 | irq.u.mchk = inti->mchk; | |
1105 | break; | |
1106 | default: | |
1107 | return -EINVAL; | |
1108 | } | |
1109 | ||
1110 | if (copy_to_user(uptr, &irq, sizeof(irq))) | |
1111 | return -EFAULT; | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len) | |
1117 | { | |
1118 | struct kvm_s390_interrupt_info *inti; | |
1119 | struct kvm_s390_float_interrupt *fi; | |
1120 | int ret = 0; | |
1121 | int n = 0; | |
1122 | ||
1123 | mutex_lock(&kvm->lock); | |
1124 | fi = &kvm->arch.float_int; | |
1125 | spin_lock(&fi->lock); | |
1126 | ||
1127 | list_for_each_entry(inti, &fi->list, list) { | |
1128 | if (len < sizeof(struct kvm_s390_irq)) { | |
1129 | /* signal userspace to try again */ | |
1130 | ret = -ENOMEM; | |
1131 | break; | |
1132 | } | |
1133 | ret = copy_irq_to_user(inti, buf); | |
1134 | if (ret) | |
1135 | break; | |
1136 | buf += sizeof(struct kvm_s390_irq); | |
1137 | len -= sizeof(struct kvm_s390_irq); | |
1138 | n++; | |
1139 | } | |
1140 | ||
1141 | spin_unlock(&fi->lock); | |
1142 | mutex_unlock(&kvm->lock); | |
1143 | ||
1144 | return ret < 0 ? ret : n; | |
1145 | } | |
1146 | ||
1147 | static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) | |
1148 | { | |
1149 | int r; | |
1150 | ||
1151 | switch (attr->group) { | |
1152 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
1153 | r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr, | |
1154 | attr->attr); | |
1155 | break; | |
1156 | default: | |
1157 | r = -EINVAL; | |
1158 | } | |
1159 | ||
1160 | return r; | |
1161 | } | |
1162 | ||
1163 | static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, | |
1164 | u64 addr) | |
1165 | { | |
1166 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1167 | void *target = NULL; | |
1168 | void __user *source; | |
1169 | u64 size; | |
1170 | ||
1171 | if (get_user(inti->type, (u64 __user *)addr)) | |
1172 | return -EFAULT; | |
1173 | ||
1174 | switch (inti->type) { | |
3c038e6b DD |
1175 | case KVM_S390_INT_PFAULT_INIT: |
1176 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1177 | case KVM_S390_INT_VIRTIO: |
1178 | case KVM_S390_INT_SERVICE: | |
1179 | target = (void *) &inti->ext; | |
1180 | source = &uptr->u.ext; | |
1181 | size = sizeof(inti->ext); | |
1182 | break; | |
1183 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1184 | target = (void *) &inti->io; | |
1185 | source = &uptr->u.io; | |
1186 | size = sizeof(inti->io); | |
1187 | break; | |
1188 | case KVM_S390_MCHK: | |
1189 | target = (void *) &inti->mchk; | |
1190 | source = &uptr->u.mchk; | |
1191 | size = sizeof(inti->mchk); | |
1192 | break; | |
1193 | default: | |
1194 | return -EINVAL; | |
1195 | } | |
1196 | ||
1197 | if (copy_from_user(target, source, size)) | |
1198 | return -EFAULT; | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static int enqueue_floating_irq(struct kvm_device *dev, | |
1204 | struct kvm_device_attr *attr) | |
1205 | { | |
1206 | struct kvm_s390_interrupt_info *inti = NULL; | |
1207 | int r = 0; | |
1208 | int len = attr->attr; | |
1209 | ||
1210 | if (len % sizeof(struct kvm_s390_irq) != 0) | |
1211 | return -EINVAL; | |
1212 | else if (len > KVM_S390_FLIC_MAX_BUFFER) | |
1213 | return -EINVAL; | |
1214 | ||
1215 | while (len >= sizeof(struct kvm_s390_irq)) { | |
1216 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
1217 | if (!inti) | |
1218 | return -ENOMEM; | |
1219 | ||
1220 | r = copy_irq_from_user(inti, attr->addr); | |
1221 | if (r) { | |
1222 | kfree(inti); | |
1223 | return r; | |
1224 | } | |
a91b8ebe JF |
1225 | r = __inject_vm(dev->kvm, inti); |
1226 | if (r) { | |
1227 | kfree(inti); | |
1228 | return r; | |
1229 | } | |
c05c4186 JF |
1230 | len -= sizeof(struct kvm_s390_irq); |
1231 | attr->addr += sizeof(struct kvm_s390_irq); | |
1232 | } | |
1233 | ||
1234 | return r; | |
1235 | } | |
1236 | ||
841b91c5 CH |
1237 | static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
1238 | { | |
1239 | if (id >= MAX_S390_IO_ADAPTERS) | |
1240 | return NULL; | |
1241 | return kvm->arch.adapters[id]; | |
1242 | } | |
1243 | ||
1244 | static int register_io_adapter(struct kvm_device *dev, | |
1245 | struct kvm_device_attr *attr) | |
1246 | { | |
1247 | struct s390_io_adapter *adapter; | |
1248 | struct kvm_s390_io_adapter adapter_info; | |
1249 | ||
1250 | if (copy_from_user(&adapter_info, | |
1251 | (void __user *)attr->addr, sizeof(adapter_info))) | |
1252 | return -EFAULT; | |
1253 | ||
1254 | if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || | |
1255 | (dev->kvm->arch.adapters[adapter_info.id] != NULL)) | |
1256 | return -EINVAL; | |
1257 | ||
1258 | adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); | |
1259 | if (!adapter) | |
1260 | return -ENOMEM; | |
1261 | ||
1262 | INIT_LIST_HEAD(&adapter->maps); | |
1263 | init_rwsem(&adapter->maps_lock); | |
1264 | atomic_set(&adapter->nr_maps, 0); | |
1265 | adapter->id = adapter_info.id; | |
1266 | adapter->isc = adapter_info.isc; | |
1267 | adapter->maskable = adapter_info.maskable; | |
1268 | adapter->masked = false; | |
1269 | adapter->swap = adapter_info.swap; | |
1270 | dev->kvm->arch.adapters[adapter->id] = adapter; | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) | |
1276 | { | |
1277 | int ret; | |
1278 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1279 | ||
1280 | if (!adapter || !adapter->maskable) | |
1281 | return -EINVAL; | |
1282 | ret = adapter->masked; | |
1283 | adapter->masked = masked; | |
1284 | return ret; | |
1285 | } | |
1286 | ||
1287 | static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) | |
1288 | { | |
1289 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1290 | struct s390_map_info *map; | |
1291 | int ret; | |
1292 | ||
1293 | if (!adapter || !addr) | |
1294 | return -EINVAL; | |
1295 | ||
1296 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
1297 | if (!map) { | |
1298 | ret = -ENOMEM; | |
1299 | goto out; | |
1300 | } | |
1301 | INIT_LIST_HEAD(&map->list); | |
1302 | map->guest_addr = addr; | |
1303 | map->addr = gmap_translate(addr, kvm->arch.gmap); | |
1304 | if (map->addr == -EFAULT) { | |
1305 | ret = -EFAULT; | |
1306 | goto out; | |
1307 | } | |
1308 | ret = get_user_pages_fast(map->addr, 1, 1, &map->page); | |
1309 | if (ret < 0) | |
1310 | goto out; | |
1311 | BUG_ON(ret != 1); | |
1312 | down_write(&adapter->maps_lock); | |
1313 | if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { | |
1314 | list_add_tail(&map->list, &adapter->maps); | |
1315 | ret = 0; | |
1316 | } else { | |
1317 | put_page(map->page); | |
1318 | ret = -EINVAL; | |
1319 | } | |
1320 | up_write(&adapter->maps_lock); | |
1321 | out: | |
1322 | if (ret) | |
1323 | kfree(map); | |
1324 | return ret; | |
1325 | } | |
1326 | ||
1327 | static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) | |
1328 | { | |
1329 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1330 | struct s390_map_info *map, *tmp; | |
1331 | int found = 0; | |
1332 | ||
1333 | if (!adapter || !addr) | |
1334 | return -EINVAL; | |
1335 | ||
1336 | down_write(&adapter->maps_lock); | |
1337 | list_for_each_entry_safe(map, tmp, &adapter->maps, list) { | |
1338 | if (map->guest_addr == addr) { | |
1339 | found = 1; | |
1340 | atomic_dec(&adapter->nr_maps); | |
1341 | list_del(&map->list); | |
1342 | put_page(map->page); | |
1343 | kfree(map); | |
1344 | break; | |
1345 | } | |
1346 | } | |
1347 | up_write(&adapter->maps_lock); | |
1348 | ||
1349 | return found ? 0 : -EINVAL; | |
1350 | } | |
1351 | ||
1352 | void kvm_s390_destroy_adapters(struct kvm *kvm) | |
1353 | { | |
1354 | int i; | |
1355 | struct s390_map_info *map, *tmp; | |
1356 | ||
1357 | for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { | |
1358 | if (!kvm->arch.adapters[i]) | |
1359 | continue; | |
1360 | list_for_each_entry_safe(map, tmp, | |
1361 | &kvm->arch.adapters[i]->maps, list) { | |
1362 | list_del(&map->list); | |
1363 | put_page(map->page); | |
1364 | kfree(map); | |
1365 | } | |
1366 | kfree(kvm->arch.adapters[i]); | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | static int modify_io_adapter(struct kvm_device *dev, | |
1371 | struct kvm_device_attr *attr) | |
1372 | { | |
1373 | struct kvm_s390_io_adapter_req req; | |
1374 | struct s390_io_adapter *adapter; | |
1375 | int ret; | |
1376 | ||
1377 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
1378 | return -EFAULT; | |
1379 | ||
1380 | adapter = get_io_adapter(dev->kvm, req.id); | |
1381 | if (!adapter) | |
1382 | return -EINVAL; | |
1383 | switch (req.type) { | |
1384 | case KVM_S390_IO_ADAPTER_MASK: | |
1385 | ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); | |
1386 | if (ret > 0) | |
1387 | ret = 0; | |
1388 | break; | |
1389 | case KVM_S390_IO_ADAPTER_MAP: | |
1390 | ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); | |
1391 | break; | |
1392 | case KVM_S390_IO_ADAPTER_UNMAP: | |
1393 | ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); | |
1394 | break; | |
1395 | default: | |
1396 | ret = -EINVAL; | |
1397 | } | |
1398 | ||
1399 | return ret; | |
1400 | } | |
1401 | ||
c05c4186 JF |
1402 | static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
1403 | { | |
1404 | int r = 0; | |
3c038e6b DD |
1405 | unsigned int i; |
1406 | struct kvm_vcpu *vcpu; | |
c05c4186 JF |
1407 | |
1408 | switch (attr->group) { | |
1409 | case KVM_DEV_FLIC_ENQUEUE: | |
1410 | r = enqueue_floating_irq(dev, attr); | |
1411 | break; | |
1412 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
1413 | r = 0; | |
67335e63 | 1414 | kvm_s390_clear_float_irqs(dev->kvm); |
c05c4186 | 1415 | break; |
3c038e6b DD |
1416 | case KVM_DEV_FLIC_APF_ENABLE: |
1417 | dev->kvm->arch.gmap->pfault_enabled = 1; | |
1418 | break; | |
1419 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
1420 | dev->kvm->arch.gmap->pfault_enabled = 0; | |
1421 | /* | |
1422 | * Make sure no async faults are in transition when | |
1423 | * clearing the queues. So we don't need to worry | |
1424 | * about late coming workers. | |
1425 | */ | |
1426 | synchronize_srcu(&dev->kvm->srcu); | |
1427 | kvm_for_each_vcpu(i, vcpu, dev->kvm) | |
1428 | kvm_clear_async_pf_completion_queue(vcpu); | |
1429 | break; | |
841b91c5 CH |
1430 | case KVM_DEV_FLIC_ADAPTER_REGISTER: |
1431 | r = register_io_adapter(dev, attr); | |
1432 | break; | |
1433 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
1434 | r = modify_io_adapter(dev, attr); | |
1435 | break; | |
c05c4186 JF |
1436 | default: |
1437 | r = -EINVAL; | |
1438 | } | |
1439 | ||
1440 | return r; | |
1441 | } | |
1442 | ||
1443 | static int flic_create(struct kvm_device *dev, u32 type) | |
1444 | { | |
1445 | if (!dev) | |
1446 | return -EINVAL; | |
1447 | if (dev->kvm->arch.flic) | |
1448 | return -EINVAL; | |
1449 | dev->kvm->arch.flic = dev; | |
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | static void flic_destroy(struct kvm_device *dev) | |
1454 | { | |
1455 | dev->kvm->arch.flic = NULL; | |
1456 | kfree(dev); | |
1457 | } | |
1458 | ||
1459 | /* s390 floating irq controller (flic) */ | |
1460 | struct kvm_device_ops kvm_flic_ops = { | |
1461 | .name = "kvm-flic", | |
1462 | .get_attr = flic_get_attr, | |
1463 | .set_attr = flic_set_attr, | |
1464 | .create = flic_create, | |
1465 | .destroy = flic_destroy, | |
1466 | }; | |
84223598 CH |
1467 | |
1468 | static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) | |
1469 | { | |
1470 | unsigned long bit; | |
1471 | ||
1472 | bit = bit_nr + (addr % PAGE_SIZE) * 8; | |
1473 | ||
1474 | return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; | |
1475 | } | |
1476 | ||
1477 | static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, | |
1478 | u64 addr) | |
1479 | { | |
1480 | struct s390_map_info *map; | |
1481 | ||
1482 | if (!adapter) | |
1483 | return NULL; | |
1484 | ||
1485 | list_for_each_entry(map, &adapter->maps, list) { | |
1486 | if (map->guest_addr == addr) | |
1487 | return map; | |
1488 | } | |
1489 | return NULL; | |
1490 | } | |
1491 | ||
1492 | static int adapter_indicators_set(struct kvm *kvm, | |
1493 | struct s390_io_adapter *adapter, | |
1494 | struct kvm_s390_adapter_int *adapter_int) | |
1495 | { | |
1496 | unsigned long bit; | |
1497 | int summary_set, idx; | |
1498 | struct s390_map_info *info; | |
1499 | void *map; | |
1500 | ||
1501 | info = get_map_info(adapter, adapter_int->ind_addr); | |
1502 | if (!info) | |
1503 | return -1; | |
1504 | map = page_address(info->page); | |
1505 | bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); | |
1506 | set_bit(bit, map); | |
1507 | idx = srcu_read_lock(&kvm->srcu); | |
1508 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
1509 | set_page_dirty_lock(info->page); | |
1510 | info = get_map_info(adapter, adapter_int->summary_addr); | |
1511 | if (!info) { | |
1512 | srcu_read_unlock(&kvm->srcu, idx); | |
1513 | return -1; | |
1514 | } | |
1515 | map = page_address(info->page); | |
1516 | bit = get_ind_bit(info->addr, adapter_int->summary_offset, | |
1517 | adapter->swap); | |
1518 | summary_set = test_and_set_bit(bit, map); | |
1519 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
1520 | set_page_dirty_lock(info->page); | |
1521 | srcu_read_unlock(&kvm->srcu, idx); | |
1522 | return summary_set ? 0 : 1; | |
1523 | } | |
1524 | ||
1525 | /* | |
1526 | * < 0 - not injected due to error | |
1527 | * = 0 - coalesced, summary indicator already active | |
1528 | * > 0 - injected interrupt | |
1529 | */ | |
1530 | static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, | |
1531 | struct kvm *kvm, int irq_source_id, int level, | |
1532 | bool line_status) | |
1533 | { | |
1534 | int ret; | |
1535 | struct s390_io_adapter *adapter; | |
1536 | ||
1537 | /* We're only interested in the 0->1 transition. */ | |
1538 | if (!level) | |
1539 | return 0; | |
1540 | adapter = get_io_adapter(kvm, e->adapter.adapter_id); | |
1541 | if (!adapter) | |
1542 | return -1; | |
1543 | down_read(&adapter->maps_lock); | |
1544 | ret = adapter_indicators_set(kvm, adapter, &e->adapter); | |
1545 | up_read(&adapter->maps_lock); | |
1546 | if ((ret > 0) && !adapter->masked) { | |
1547 | struct kvm_s390_interrupt s390int = { | |
1548 | .type = KVM_S390_INT_IO(1, 0, 0, 0), | |
1549 | .parm = 0, | |
1550 | .parm64 = (adapter->isc << 27) | 0x80000000, | |
1551 | }; | |
1552 | ret = kvm_s390_inject_vm(kvm, &s390int); | |
1553 | if (ret == 0) | |
1554 | ret = 1; | |
1555 | } | |
1556 | return ret; | |
1557 | } | |
1558 | ||
8ba918d4 | 1559 | int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
84223598 CH |
1560 | const struct kvm_irq_routing_entry *ue) |
1561 | { | |
1562 | int ret; | |
1563 | ||
1564 | switch (ue->type) { | |
1565 | case KVM_IRQ_ROUTING_S390_ADAPTER: | |
1566 | e->set = set_adapter_int; | |
1567 | e->adapter.summary_addr = ue->u.adapter.summary_addr; | |
1568 | e->adapter.ind_addr = ue->u.adapter.ind_addr; | |
1569 | e->adapter.summary_offset = ue->u.adapter.summary_offset; | |
1570 | e->adapter.ind_offset = ue->u.adapter.ind_offset; | |
1571 | e->adapter.adapter_id = ue->u.adapter.adapter_id; | |
1572 | ret = 0; | |
1573 | break; | |
1574 | default: | |
1575 | ret = -EINVAL; | |
1576 | } | |
1577 | ||
1578 | return ret; | |
1579 | } | |
1580 | ||
1581 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, | |
1582 | int irq_source_id, int level, bool line_status) | |
1583 | { | |
1584 | return -EINVAL; | |
1585 | } |