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Commit | Line | Data |
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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> |
383d0b05 | 19 | #include <linux/bitmap.h> |
cbb870c8 HC |
20 | #include <asm/asm-offsets.h> |
21 | #include <asm/uaccess.h> | |
ea5f4969 | 22 | #include <asm/sclp.h> |
ba5c1e9b CO |
23 | #include "kvm-s390.h" |
24 | #include "gaccess.h" | |
ade38c31 | 25 | #include "trace-s390.h" |
ba5c1e9b | 26 | |
d8346b7d CH |
27 | #define IOINT_SCHID_MASK 0x0000ffff |
28 | #define IOINT_SSID_MASK 0x00030000 | |
29 | #define IOINT_CSSID_MASK 0x03fc0000 | |
30 | #define IOINT_AI_MASK 0x04000000 | |
44c6ca3d | 31 | #define PFAULT_INIT 0x0600 |
60f90a14 JF |
32 | #define PFAULT_DONE 0x0680 |
33 | #define VIRTIO_PARAM 0x0d00 | |
d8346b7d CH |
34 | |
35 | static int is_ioint(u64 type) | |
36 | { | |
37 | return ((type & 0xfffe0000u) != 0xfffe0000u); | |
38 | } | |
39 | ||
3c038e6b | 40 | int psw_extint_disabled(struct kvm_vcpu *vcpu) |
ba5c1e9b CO |
41 | { |
42 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
43 | } | |
44 | ||
d8346b7d CH |
45 | static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
46 | { | |
47 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); | |
48 | } | |
49 | ||
48a3e950 CH |
50 | static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
51 | { | |
52 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); | |
53 | } | |
54 | ||
ba5c1e9b CO |
55 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
56 | { | |
57 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || | |
58 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || | |
59 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) | |
60 | return 0; | |
61 | return 1; | |
62 | } | |
63 | ||
bb78c5ec DH |
64 | static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
65 | { | |
66 | if (psw_extint_disabled(vcpu) || | |
67 | !(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
68 | return 0; | |
f71d0dc5 DH |
69 | if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
70 | /* No timer interrupts when single stepping */ | |
71 | return 0; | |
bb78c5ec DH |
72 | return 1; |
73 | } | |
74 | ||
79fd50c6 CH |
75 | static u64 int_word_to_isc_bits(u32 int_word) |
76 | { | |
77 | u8 isc = (int_word & 0x38000000) >> 27; | |
78 | ||
79 | return (0x80 >> isc) << 24; | |
80 | } | |
81 | ||
614aeab4 | 82 | static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu, |
180c12fb | 83 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
84 | { |
85 | switch (inti->type) { | |
7697e71f CE |
86 | case KVM_S390_INT_EXTERNAL_CALL: |
87 | if (psw_extint_disabled(vcpu)) | |
88 | return 0; | |
89 | if (vcpu->arch.sie_block->gcr[0] & 0x2000ul) | |
90 | return 1; | |
f346026e | 91 | return 0; |
ba5c1e9b CO |
92 | case KVM_S390_INT_EMERGENCY: |
93 | if (psw_extint_disabled(vcpu)) | |
94 | return 0; | |
95 | if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) | |
96 | return 1; | |
97 | return 0; | |
e029ae5b TH |
98 | case KVM_S390_INT_CLOCK_COMP: |
99 | return ckc_interrupts_enabled(vcpu); | |
100 | case KVM_S390_INT_CPU_TIMER: | |
101 | if (psw_extint_disabled(vcpu)) | |
102 | return 0; | |
103 | if (vcpu->arch.sie_block->gcr[0] & 0x400ul) | |
104 | return 1; | |
105 | return 0; | |
ba5c1e9b | 106 | case KVM_S390_INT_SERVICE: |
3c038e6b DD |
107 | case KVM_S390_INT_PFAULT_INIT: |
108 | case KVM_S390_INT_PFAULT_DONE: | |
ba5c1e9b CO |
109 | case KVM_S390_INT_VIRTIO: |
110 | if (psw_extint_disabled(vcpu)) | |
111 | return 0; | |
112 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
113 | return 1; | |
114 | return 0; | |
115 | case KVM_S390_PROGRAM_INT: | |
116 | case KVM_S390_SIGP_STOP: | |
117 | case KVM_S390_SIGP_SET_PREFIX: | |
118 | case KVM_S390_RESTART: | |
119 | return 1; | |
48a3e950 CH |
120 | case KVM_S390_MCHK: |
121 | if (psw_mchk_disabled(vcpu)) | |
122 | return 0; | |
123 | if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14) | |
124 | return 1; | |
125 | return 0; | |
d8346b7d CH |
126 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
127 | if (psw_ioint_disabled(vcpu)) | |
128 | return 0; | |
79fd50c6 CH |
129 | if (vcpu->arch.sie_block->gcr[6] & |
130 | int_word_to_isc_bits(inti->io.io_int_word)) | |
d8346b7d CH |
131 | return 1; |
132 | return 0; | |
ba5c1e9b | 133 | default: |
d8346b7d CH |
134 | printk(KERN_WARNING "illegal interrupt type %llx\n", |
135 | inti->type); | |
ba5c1e9b CO |
136 | BUG(); |
137 | } | |
138 | return 0; | |
139 | } | |
140 | ||
383d0b05 JF |
141 | static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu) |
142 | { | |
143 | return vcpu->arch.local_int.pending_irqs; | |
144 | } | |
145 | ||
146 | static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu) | |
147 | { | |
148 | unsigned long active_mask = pending_local_irqs(vcpu); | |
149 | ||
150 | if (psw_extint_disabled(vcpu)) | |
151 | active_mask &= ~IRQ_PEND_EXT_MASK; | |
152 | if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
153 | __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask); | |
154 | if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul)) | |
155 | __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask); | |
156 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
157 | __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask); | |
158 | if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul)) | |
159 | __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask); | |
160 | if (psw_mchk_disabled(vcpu)) | |
161 | active_mask &= ~IRQ_PEND_MCHK_MASK; | |
162 | ||
6cddd432 DH |
163 | /* |
164 | * STOP irqs will never be actively delivered. They are triggered via | |
165 | * intercept requests and cleared when the stop intercept is performed. | |
166 | */ | |
167 | __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask); | |
168 | ||
383d0b05 JF |
169 | return active_mask; |
170 | } | |
171 | ||
ba5c1e9b CO |
172 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
173 | { | |
ba5c1e9b CO |
174 | atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
175 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
176 | } | |
177 | ||
178 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
179 | { | |
ba5c1e9b CO |
180 | atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
181 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
182 | } | |
183 | ||
184 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
185 | { | |
4953919f DH |
186 | atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, |
187 | &vcpu->arch.sie_block->cpuflags); | |
ba5c1e9b | 188 | vcpu->arch.sie_block->lctl = 0x0000; |
27291e21 DH |
189 | vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
190 | ||
191 | if (guestdbg_enabled(vcpu)) { | |
192 | vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | | |
193 | LCTL_CR10 | LCTL_CR11); | |
194 | vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); | |
195 | } | |
ba5c1e9b CO |
196 | } |
197 | ||
198 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
199 | { | |
200 | atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); | |
201 | } | |
202 | ||
383d0b05 JF |
203 | static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) |
204 | { | |
205 | if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK)) | |
206 | return; | |
207 | if (psw_extint_disabled(vcpu)) | |
208 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
209 | else | |
210 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
211 | } | |
212 | ||
213 | static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) | |
214 | { | |
215 | if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK)) | |
216 | return; | |
217 | if (psw_mchk_disabled(vcpu)) | |
218 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
219 | else | |
220 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
221 | } | |
222 | ||
6cddd432 DH |
223 | static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu) |
224 | { | |
225 | if (kvm_s390_is_stop_irq_pending(vcpu)) | |
226 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
227 | } | |
228 | ||
383d0b05 JF |
229 | /* Set interception request for non-deliverable local interrupts */ |
230 | static void set_intercept_indicators_local(struct kvm_vcpu *vcpu) | |
231 | { | |
232 | set_intercept_indicators_ext(vcpu); | |
233 | set_intercept_indicators_mchk(vcpu); | |
6cddd432 | 234 | set_intercept_indicators_stop(vcpu); |
383d0b05 JF |
235 | } |
236 | ||
ba5c1e9b | 237 | static void __set_intercept_indicator(struct kvm_vcpu *vcpu, |
180c12fb | 238 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
239 | { |
240 | switch (inti->type) { | |
ba5c1e9b | 241 | case KVM_S390_INT_SERVICE: |
3c038e6b | 242 | case KVM_S390_INT_PFAULT_DONE: |
ba5c1e9b CO |
243 | case KVM_S390_INT_VIRTIO: |
244 | if (psw_extint_disabled(vcpu)) | |
245 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
246 | else | |
247 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
248 | break; | |
48a3e950 CH |
249 | case KVM_S390_MCHK: |
250 | if (psw_mchk_disabled(vcpu)) | |
251 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
252 | else | |
253 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
254 | break; | |
d8346b7d CH |
255 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
256 | if (psw_ioint_disabled(vcpu)) | |
257 | __set_cpuflag(vcpu, CPUSTAT_IO_INT); | |
258 | else | |
259 | vcpu->arch.sie_block->lctl |= LCTL_CR6; | |
260 | break; | |
ba5c1e9b CO |
261 | default: |
262 | BUG(); | |
263 | } | |
264 | } | |
265 | ||
8a2ef71b JF |
266 | static u16 get_ilc(struct kvm_vcpu *vcpu) |
267 | { | |
268 | const unsigned short table[] = { 2, 4, 4, 6 }; | |
269 | ||
270 | switch (vcpu->arch.sie_block->icptcode) { | |
271 | case ICPT_INST: | |
272 | case ICPT_INSTPROGI: | |
273 | case ICPT_OPEREXC: | |
274 | case ICPT_PARTEXEC: | |
275 | case ICPT_IOINST: | |
276 | /* last instruction only stored for these icptcodes */ | |
277 | return table[vcpu->arch.sie_block->ipa >> 14]; | |
278 | case ICPT_PROGI: | |
279 | return vcpu->arch.sie_block->pgmilc; | |
280 | default: | |
281 | return 0; | |
282 | } | |
283 | } | |
284 | ||
0fb97abe JF |
285 | static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) |
286 | { | |
383d0b05 | 287 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
288 | int rc; |
289 | ||
290 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, | |
291 | 0, 0); | |
292 | ||
293 | rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, | |
294 | (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 295 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
296 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
297 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
298 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
299 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 300 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
99e20009 | 301 | return rc ? -EFAULT : 0; |
0fb97abe JF |
302 | } |
303 | ||
304 | static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) | |
305 | { | |
383d0b05 | 306 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
307 | int rc; |
308 | ||
309 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, | |
310 | 0, 0); | |
311 | ||
312 | rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP, | |
313 | (u16 __user *)__LC_EXT_INT_CODE); | |
467fc298 | 314 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
315 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
316 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
317 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
318 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 319 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
99e20009 | 320 | return rc ? -EFAULT : 0; |
0fb97abe JF |
321 | } |
322 | ||
383d0b05 | 323 | static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) |
0fb97abe | 324 | { |
383d0b05 JF |
325 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
326 | struct kvm_s390_ext_info ext; | |
0fb97abe JF |
327 | int rc; |
328 | ||
383d0b05 JF |
329 | spin_lock(&li->lock); |
330 | ext = li->irq.ext; | |
331 | clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
332 | li->irq.ext.ext_params2 = 0; | |
333 | spin_unlock(&li->lock); | |
334 | ||
0fb97abe | 335 | VCPU_EVENT(vcpu, 4, "interrupt: pfault init parm:%x,parm64:%llx", |
383d0b05 | 336 | 0, ext.ext_params2); |
0fb97abe JF |
337 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
338 | KVM_S390_INT_PFAULT_INIT, | |
383d0b05 | 339 | 0, ext.ext_params2); |
0fb97abe JF |
340 | |
341 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE); | |
342 | rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); | |
343 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
344 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
345 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
346 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 347 | rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); |
99e20009 | 348 | return rc ? -EFAULT : 0; |
0fb97abe JF |
349 | } |
350 | ||
383d0b05 | 351 | static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) |
0fb97abe | 352 | { |
383d0b05 JF |
353 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
354 | struct kvm_s390_mchk_info mchk; | |
0fb97abe JF |
355 | int rc; |
356 | ||
383d0b05 JF |
357 | spin_lock(&li->lock); |
358 | mchk = li->irq.mchk; | |
359 | /* | |
360 | * If there was an exigent machine check pending, then any repressible | |
361 | * machine checks that might have been pending are indicated along | |
362 | * with it, so always clear both bits | |
363 | */ | |
364 | clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
365 | clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
366 | memset(&li->irq.mchk, 0, sizeof(mchk)); | |
367 | spin_unlock(&li->lock); | |
368 | ||
0fb97abe | 369 | VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx", |
383d0b05 | 370 | mchk.mcic); |
0fb97abe | 371 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK, |
383d0b05 | 372 | mchk.cr14, mchk.mcic); |
0fb97abe JF |
373 | |
374 | rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED); | |
383d0b05 | 375 | rc |= put_guest_lc(vcpu, mchk.mcic, |
0fb97abe | 376 | (u64 __user *) __LC_MCCK_CODE); |
383d0b05 | 377 | rc |= put_guest_lc(vcpu, mchk.failing_storage_address, |
0fb97abe JF |
378 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); |
379 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, | |
383d0b05 | 380 | &mchk.fixed_logout, sizeof(mchk.fixed_logout)); |
0fb97abe JF |
381 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, |
382 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
384 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 385 | return rc ? -EFAULT : 0; |
0fb97abe JF |
386 | } |
387 | ||
388 | static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) | |
389 | { | |
383d0b05 | 390 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
391 | int rc; |
392 | ||
393 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); | |
394 | vcpu->stat.deliver_restart_signal++; | |
395 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); | |
396 | ||
397 | rc = write_guest_lc(vcpu, | |
398 | offsetof(struct _lowcore, restart_old_psw), | |
399 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
400 | rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw), | |
401 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 402 | clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
99e20009 | 403 | return rc ? -EFAULT : 0; |
0fb97abe JF |
404 | } |
405 | ||
383d0b05 | 406 | static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) |
0fb97abe | 407 | { |
383d0b05 JF |
408 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
409 | struct kvm_s390_prefix_info prefix; | |
410 | ||
411 | spin_lock(&li->lock); | |
412 | prefix = li->irq.prefix; | |
413 | li->irq.prefix.address = 0; | |
414 | clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
415 | spin_unlock(&li->lock); | |
0fb97abe | 416 | |
383d0b05 | 417 | VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address); |
0fb97abe JF |
418 | vcpu->stat.deliver_prefix_signal++; |
419 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
420 | KVM_S390_SIGP_SET_PREFIX, | |
383d0b05 | 421 | prefix.address, 0); |
0fb97abe | 422 | |
383d0b05 | 423 | kvm_s390_set_prefix(vcpu, prefix.address); |
0fb97abe JF |
424 | return 0; |
425 | } | |
426 | ||
383d0b05 | 427 | static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) |
0fb97abe | 428 | { |
383d0b05 | 429 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe | 430 | int rc; |
383d0b05 JF |
431 | int cpu_addr; |
432 | ||
433 | spin_lock(&li->lock); | |
434 | cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
435 | clear_bit(cpu_addr, li->sigp_emerg_pending); | |
436 | if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) | |
437 | clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); | |
438 | spin_unlock(&li->lock); | |
0fb97abe JF |
439 | |
440 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); | |
441 | vcpu->stat.deliver_emergency_signal++; | |
383d0b05 JF |
442 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
443 | cpu_addr, 0); | |
0fb97abe JF |
444 | |
445 | rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, | |
446 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 447 | rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
448 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
449 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
450 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
451 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 452 | return rc ? -EFAULT : 0; |
0fb97abe JF |
453 | } |
454 | ||
383d0b05 | 455 | static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) |
0fb97abe | 456 | { |
383d0b05 JF |
457 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
458 | struct kvm_s390_extcall_info extcall; | |
0fb97abe JF |
459 | int rc; |
460 | ||
383d0b05 JF |
461 | spin_lock(&li->lock); |
462 | extcall = li->irq.extcall; | |
463 | li->irq.extcall.code = 0; | |
464 | clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
465 | spin_unlock(&li->lock); | |
466 | ||
0fb97abe JF |
467 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call"); |
468 | vcpu->stat.deliver_external_call++; | |
469 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
470 | KVM_S390_INT_EXTERNAL_CALL, | |
383d0b05 | 471 | extcall.code, 0); |
0fb97abe JF |
472 | |
473 | rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, | |
474 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 475 | rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
476 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
477 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
478 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, | |
479 | sizeof(psw_t)); | |
99e20009 | 480 | return rc ? -EFAULT : 0; |
0fb97abe JF |
481 | } |
482 | ||
383d0b05 | 483 | static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) |
8712836b | 484 | { |
383d0b05 JF |
485 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
486 | struct kvm_s390_pgm_info pgm_info; | |
8712836b | 487 | int rc = 0; |
8a2ef71b | 488 | u16 ilc = get_ilc(vcpu); |
8712836b | 489 | |
383d0b05 JF |
490 | spin_lock(&li->lock); |
491 | pgm_info = li->irq.pgm; | |
492 | clear_bit(IRQ_PEND_PROG, &li->pending_irqs); | |
493 | memset(&li->irq.pgm, 0, sizeof(pgm_info)); | |
494 | spin_unlock(&li->lock); | |
495 | ||
0fb97abe | 496 | VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", |
383d0b05 | 497 | pgm_info.code, ilc); |
0fb97abe JF |
498 | vcpu->stat.deliver_program_int++; |
499 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
383d0b05 | 500 | pgm_info.code, 0); |
0fb97abe | 501 | |
383d0b05 | 502 | switch (pgm_info.code & ~PGM_PER) { |
8712836b DH |
503 | case PGM_AFX_TRANSLATION: |
504 | case PGM_ASX_TRANSLATION: | |
505 | case PGM_EX_TRANSLATION: | |
506 | case PGM_LFX_TRANSLATION: | |
507 | case PGM_LSTE_SEQUENCE: | |
508 | case PGM_LSX_TRANSLATION: | |
509 | case PGM_LX_TRANSLATION: | |
510 | case PGM_PRIMARY_AUTHORITY: | |
511 | case PGM_SECONDARY_AUTHORITY: | |
512 | case PGM_SPACE_SWITCH: | |
383d0b05 | 513 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b DH |
514 | (u64 *)__LC_TRANS_EXC_CODE); |
515 | break; | |
516 | case PGM_ALEN_TRANSLATION: | |
517 | case PGM_ALE_SEQUENCE: | |
518 | case PGM_ASTE_INSTANCE: | |
519 | case PGM_ASTE_SEQUENCE: | |
520 | case PGM_ASTE_VALIDITY: | |
521 | case PGM_EXTENDED_AUTHORITY: | |
383d0b05 | 522 | rc = put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b DH |
523 | (u8 *)__LC_EXC_ACCESS_ID); |
524 | break; | |
525 | case PGM_ASCE_TYPE: | |
526 | case PGM_PAGE_TRANSLATION: | |
527 | case PGM_REGION_FIRST_TRANS: | |
528 | case PGM_REGION_SECOND_TRANS: | |
529 | case PGM_REGION_THIRD_TRANS: | |
530 | case PGM_SEGMENT_TRANSLATION: | |
383d0b05 | 531 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 532 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 533 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 534 | (u8 *)__LC_EXC_ACCESS_ID); |
383d0b05 | 535 | rc |= put_guest_lc(vcpu, pgm_info.op_access_id, |
8712836b DH |
536 | (u8 *)__LC_OP_ACCESS_ID); |
537 | break; | |
538 | case PGM_MONITOR: | |
383d0b05 | 539 | rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, |
a36c5393 | 540 | (u16 *)__LC_MON_CLASS_NR); |
383d0b05 | 541 | rc |= put_guest_lc(vcpu, pgm_info.mon_code, |
8712836b DH |
542 | (u64 *)__LC_MON_CODE); |
543 | break; | |
544 | case PGM_DATA: | |
383d0b05 | 545 | rc = put_guest_lc(vcpu, pgm_info.data_exc_code, |
8712836b DH |
546 | (u32 *)__LC_DATA_EXC_CODE); |
547 | break; | |
548 | case PGM_PROTECTION: | |
383d0b05 | 549 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 550 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 551 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b DH |
552 | (u8 *)__LC_EXC_ACCESS_ID); |
553 | break; | |
554 | } | |
555 | ||
383d0b05 JF |
556 | if (pgm_info.code & PGM_PER) { |
557 | rc |= put_guest_lc(vcpu, pgm_info.per_code, | |
8712836b | 558 | (u8 *) __LC_PER_CODE); |
383d0b05 | 559 | rc |= put_guest_lc(vcpu, pgm_info.per_atmid, |
8712836b | 560 | (u8 *)__LC_PER_ATMID); |
383d0b05 | 561 | rc |= put_guest_lc(vcpu, pgm_info.per_address, |
8712836b | 562 | (u64 *) __LC_PER_ADDRESS); |
383d0b05 | 563 | rc |= put_guest_lc(vcpu, pgm_info.per_access_id, |
8712836b DH |
564 | (u8 *) __LC_PER_ACCESS_ID); |
565 | } | |
566 | ||
8a2ef71b | 567 | rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC); |
383d0b05 | 568 | rc |= put_guest_lc(vcpu, pgm_info.code, |
8712836b DH |
569 | (u16 *)__LC_PGM_INT_CODE); |
570 | rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, | |
571 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
572 | rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, | |
573 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 574 | return rc ? -EFAULT : 0; |
0fb97abe JF |
575 | } |
576 | ||
577 | static int __must_check __deliver_service(struct kvm_vcpu *vcpu, | |
578 | struct kvm_s390_interrupt_info *inti) | |
579 | { | |
580 | int rc; | |
581 | ||
582 | VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", | |
583 | inti->ext.ext_params); | |
584 | vcpu->stat.deliver_service_signal++; | |
585 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
586 | inti->ext.ext_params, 0); | |
587 | ||
588 | rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 589 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
590 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
591 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
592 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
593 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
594 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
595 | (u32 *)__LC_EXT_PARAMS); | |
99e20009 | 596 | return rc ? -EFAULT : 0; |
0fb97abe JF |
597 | } |
598 | ||
599 | static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu, | |
600 | struct kvm_s390_interrupt_info *inti) | |
601 | { | |
602 | int rc; | |
603 | ||
604 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
605 | KVM_S390_INT_PFAULT_DONE, 0, | |
606 | inti->ext.ext_params2); | |
8712836b | 607 | |
0fb97abe JF |
608 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE); |
609 | rc |= put_guest_lc(vcpu, PFAULT_DONE, (u16 *)__LC_EXT_CPU_ADDR); | |
610 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
611 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
612 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
613 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
614 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
615 | (u64 *)__LC_EXT_PARAMS2); | |
99e20009 | 616 | return rc ? -EFAULT : 0; |
0fb97abe JF |
617 | } |
618 | ||
619 | static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu, | |
620 | struct kvm_s390_interrupt_info *inti) | |
621 | { | |
622 | int rc; | |
623 | ||
624 | VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx", | |
625 | inti->ext.ext_params, inti->ext.ext_params2); | |
626 | vcpu->stat.deliver_virtio_interrupt++; | |
627 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
628 | inti->ext.ext_params, | |
629 | inti->ext.ext_params2); | |
630 | ||
631 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE); | |
632 | rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (u16 *)__LC_EXT_CPU_ADDR); | |
633 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
634 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
635 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
636 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
637 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
638 | (u32 *)__LC_EXT_PARAMS); | |
639 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
640 | (u64 *)__LC_EXT_PARAMS2); | |
99e20009 | 641 | return rc ? -EFAULT : 0; |
0fb97abe JF |
642 | } |
643 | ||
644 | static int __must_check __deliver_io(struct kvm_vcpu *vcpu, | |
645 | struct kvm_s390_interrupt_info *inti) | |
646 | { | |
647 | int rc; | |
648 | ||
649 | VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type); | |
650 | vcpu->stat.deliver_io_int++; | |
651 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
652 | ((__u32)inti->io.subchannel_id << 16) | | |
653 | inti->io.subchannel_nr, | |
654 | ((__u64)inti->io.io_int_parm << 32) | | |
655 | inti->io.io_int_word); | |
656 | ||
657 | rc = put_guest_lc(vcpu, inti->io.subchannel_id, | |
658 | (u16 *)__LC_SUBCHANNEL_ID); | |
659 | rc |= put_guest_lc(vcpu, inti->io.subchannel_nr, | |
660 | (u16 *)__LC_SUBCHANNEL_NR); | |
661 | rc |= put_guest_lc(vcpu, inti->io.io_int_parm, | |
662 | (u32 *)__LC_IO_INT_PARM); | |
663 | rc |= put_guest_lc(vcpu, inti->io.io_int_word, | |
664 | (u32 *)__LC_IO_INT_WORD); | |
665 | rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, | |
666 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
667 | rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, | |
668 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 669 | return rc ? -EFAULT : 0; |
8712836b DH |
670 | } |
671 | ||
383d0b05 JF |
672 | static int __must_check __deliver_mchk_floating(struct kvm_vcpu *vcpu, |
673 | struct kvm_s390_interrupt_info *inti) | |
674 | { | |
675 | struct kvm_s390_mchk_info *mchk = &inti->mchk; | |
676 | int rc; | |
677 | ||
678 | VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx", | |
679 | mchk->mcic); | |
680 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK, | |
681 | mchk->cr14, mchk->mcic); | |
682 | ||
683 | rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED); | |
684 | rc |= put_guest_lc(vcpu, mchk->mcic, | |
685 | (u64 __user *) __LC_MCCK_CODE); | |
686 | rc |= put_guest_lc(vcpu, mchk->failing_storage_address, | |
687 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); | |
688 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, | |
689 | &mchk->fixed_logout, sizeof(mchk->fixed_logout)); | |
690 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, | |
691 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
692 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
693 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 694 | return rc ? -EFAULT : 0; |
383d0b05 JF |
695 | } |
696 | ||
697 | typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu); | |
698 | ||
699 | static const deliver_irq_t deliver_irq_funcs[] = { | |
700 | [IRQ_PEND_MCHK_EX] = __deliver_machine_check, | |
701 | [IRQ_PEND_PROG] = __deliver_prog, | |
702 | [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal, | |
703 | [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call, | |
704 | [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc, | |
705 | [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer, | |
706 | [IRQ_PEND_RESTART] = __deliver_restart, | |
383d0b05 JF |
707 | [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix, |
708 | [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init, | |
709 | }; | |
710 | ||
711 | static int __must_check __deliver_floating_interrupt(struct kvm_vcpu *vcpu, | |
712 | struct kvm_s390_interrupt_info *inti) | |
ba5c1e9b | 713 | { |
0fb97abe | 714 | int rc; |
ba5c1e9b CO |
715 | |
716 | switch (inti->type) { | |
ba5c1e9b | 717 | case KVM_S390_INT_SERVICE: |
0fb97abe | 718 | rc = __deliver_service(vcpu, inti); |
ba5c1e9b | 719 | break; |
3c038e6b | 720 | case KVM_S390_INT_PFAULT_DONE: |
0fb97abe | 721 | rc = __deliver_pfault_done(vcpu, inti); |
3c038e6b | 722 | break; |
ba5c1e9b | 723 | case KVM_S390_INT_VIRTIO: |
0fb97abe | 724 | rc = __deliver_virtio(vcpu, inti); |
ba5c1e9b | 725 | break; |
48a3e950 | 726 | case KVM_S390_MCHK: |
383d0b05 | 727 | rc = __deliver_mchk_floating(vcpu, inti); |
48a3e950 | 728 | break; |
d8346b7d | 729 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
0fb97abe | 730 | rc = __deliver_io(vcpu, inti); |
d8346b7d | 731 | break; |
ba5c1e9b CO |
732 | default: |
733 | BUG(); | |
734 | } | |
79395031 JF |
735 | |
736 | return rc; | |
ba5c1e9b CO |
737 | } |
738 | ||
ea5f4969 DH |
739 | /* Check whether an external call is pending (deliverable or not) */ |
740 | int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) | |
4953919f | 741 | { |
ea5f4969 DH |
742 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
743 | uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
4953919f | 744 | |
ea5f4969 DH |
745 | if (!sclp_has_sigpif()) |
746 | return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
4953919f | 747 | |
ea5f4969 DH |
748 | return (sigp_ctrl & SIGP_CTRL_C) && |
749 | (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND); | |
4953919f DH |
750 | } |
751 | ||
9a022067 | 752 | int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) |
ba5c1e9b | 753 | { |
180c12fb CB |
754 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; |
755 | struct kvm_s390_interrupt_info *inti; | |
383d0b05 | 756 | int rc; |
ba5c1e9b | 757 | |
383d0b05 | 758 | rc = !!deliverable_local_irqs(vcpu); |
ba5c1e9b CO |
759 | |
760 | if ((!rc) && atomic_read(&fi->active)) { | |
b037a4f3 | 761 | spin_lock(&fi->lock); |
ba5c1e9b CO |
762 | list_for_each_entry(inti, &fi->list, list) |
763 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
764 | rc = 1; | |
765 | break; | |
766 | } | |
b037a4f3 | 767 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
768 | } |
769 | ||
bb78c5ec DH |
770 | if (!rc && kvm_cpu_has_pending_timer(vcpu)) |
771 | rc = 1; | |
ba5c1e9b | 772 | |
ea5f4969 DH |
773 | /* external call pending and deliverable */ |
774 | if (!rc && kvm_s390_ext_call_pending(vcpu) && | |
775 | !psw_extint_disabled(vcpu) && | |
776 | (vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
4953919f DH |
777 | rc = 1; |
778 | ||
9a022067 | 779 | if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) |
6cddd432 DH |
780 | rc = 1; |
781 | ||
ba5c1e9b CO |
782 | return rc; |
783 | } | |
784 | ||
3d80840d MT |
785 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
786 | { | |
bb78c5ec DH |
787 | if (!(vcpu->arch.sie_block->ckc < |
788 | get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) | |
789 | return 0; | |
790 | if (!ckc_interrupts_enabled(vcpu)) | |
791 | return 0; | |
792 | return 1; | |
3d80840d MT |
793 | } |
794 | ||
ba5c1e9b CO |
795 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
796 | { | |
797 | u64 now, sltime; | |
ba5c1e9b CO |
798 | |
799 | vcpu->stat.exit_wait_state++; | |
ba5c1e9b | 800 | |
0759d068 DH |
801 | /* fast path */ |
802 | if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu)) | |
803 | return 0; | |
e52b2af5 | 804 | |
ba5c1e9b CO |
805 | if (psw_interrupts_disabled(vcpu)) { |
806 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
b8e660b8 | 807 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
808 | } |
809 | ||
bb78c5ec | 810 | if (!ckc_interrupts_enabled(vcpu)) { |
ba5c1e9b | 811 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
bda343ef | 812 | __set_cpu_idle(vcpu); |
ba5c1e9b CO |
813 | goto no_timer; |
814 | } | |
815 | ||
8c071b0f | 816 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
ed4f2094 | 817 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); |
bda343ef DH |
818 | |
819 | /* underflow */ | |
820 | if (vcpu->arch.sie_block->ckc < now) | |
821 | return 0; | |
822 | ||
823 | __set_cpu_idle(vcpu); | |
ca872302 CB |
824 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
825 | VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime); | |
ba5c1e9b | 826 | no_timer: |
800c1065 | 827 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
0759d068 | 828 | kvm_vcpu_block(vcpu); |
ba5c1e9b | 829 | __unset_cpu_idle(vcpu); |
800c1065 TH |
830 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
831 | ||
2d00f759 | 832 | hrtimer_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
833 | return 0; |
834 | } | |
835 | ||
0e9c85a5 DH |
836 | void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
837 | { | |
838 | if (waitqueue_active(&vcpu->wq)) { | |
839 | /* | |
840 | * The vcpu gave up the cpu voluntarily, mark it as a good | |
841 | * yield-candidate. | |
842 | */ | |
843 | vcpu->preempted = true; | |
844 | wake_up_interruptible(&vcpu->wq); | |
ce2e4f0b | 845 | vcpu->stat.halt_wakeup++; |
0e9c85a5 DH |
846 | } |
847 | } | |
848 | ||
ca872302 CB |
849 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
850 | { | |
851 | struct kvm_vcpu *vcpu; | |
2d00f759 | 852 | u64 now, sltime; |
ca872302 CB |
853 | |
854 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
2d00f759 DH |
855 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
856 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); | |
ca872302 | 857 | |
2d00f759 DH |
858 | /* |
859 | * If the monotonic clock runs faster than the tod clock we might be | |
860 | * woken up too early and have to go back to sleep to avoid deadlocks. | |
861 | */ | |
862 | if (vcpu->arch.sie_block->ckc > now && | |
863 | hrtimer_forward_now(timer, ns_to_ktime(sltime))) | |
864 | return HRTIMER_RESTART; | |
865 | kvm_s390_vcpu_wakeup(vcpu); | |
ca872302 CB |
866 | return HRTIMER_NORESTART; |
867 | } | |
ba5c1e9b | 868 | |
2ed10cc1 JF |
869 | void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
870 | { | |
871 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2ed10cc1 | 872 | |
4ae3c081 | 873 | spin_lock(&li->lock); |
383d0b05 JF |
874 | li->pending_irqs = 0; |
875 | bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
876 | memset(&li->irq, 0, sizeof(li->irq)); | |
4ae3c081 | 877 | spin_unlock(&li->lock); |
4953919f DH |
878 | |
879 | /* clear pending external calls set by sigp interpretation facility */ | |
383d0b05 | 880 | atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags); |
ea5f4969 | 881 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0; |
2ed10cc1 JF |
882 | } |
883 | ||
614aeab4 | 884 | int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
ba5c1e9b | 885 | { |
180c12fb CB |
886 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
887 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
888 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
383d0b05 | 889 | deliver_irq_t func; |
ba5c1e9b | 890 | int deliver; |
79395031 | 891 | int rc = 0; |
383d0b05 JF |
892 | unsigned long irq_type; |
893 | unsigned long deliverable_irqs; | |
ba5c1e9b CO |
894 | |
895 | __reset_intercept_indicators(vcpu); | |
ba5c1e9b | 896 | |
383d0b05 JF |
897 | /* pending ckc conditions might have been invalidated */ |
898 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
899 | if (kvm_cpu_has_pending_timer(vcpu)) | |
900 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
901 | ||
902 | do { | |
903 | deliverable_irqs = deliverable_local_irqs(vcpu); | |
904 | /* bits are in the order of interrupt priority */ | |
905 | irq_type = find_first_bit(&deliverable_irqs, IRQ_PEND_COUNT); | |
906 | if (irq_type == IRQ_PEND_COUNT) | |
907 | break; | |
908 | func = deliver_irq_funcs[irq_type]; | |
909 | if (!func) { | |
910 | WARN_ON_ONCE(func == NULL); | |
911 | clear_bit(irq_type, &li->pending_irqs); | |
912 | continue; | |
913 | } | |
914 | rc = func(vcpu); | |
915 | } while (!rc && irq_type != IRQ_PEND_COUNT); | |
916 | ||
917 | set_intercept_indicators_local(vcpu); | |
ba5c1e9b | 918 | |
79395031 | 919 | if (!rc && atomic_read(&fi->active)) { |
ba5c1e9b CO |
920 | do { |
921 | deliver = 0; | |
b037a4f3 | 922 | spin_lock(&fi->lock); |
ba5c1e9b CO |
923 | list_for_each_entry_safe(inti, n, &fi->list, list) { |
924 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
925 | list_del(&inti->list); | |
a91b8ebe | 926 | fi->irq_count--; |
ba5c1e9b CO |
927 | deliver = 1; |
928 | break; | |
929 | } | |
930 | __set_intercept_indicator(vcpu, inti); | |
931 | } | |
932 | if (list_empty(&fi->list)) | |
933 | atomic_set(&fi->active, 0); | |
b037a4f3 | 934 | spin_unlock(&fi->lock); |
ba5c1e9b | 935 | if (deliver) { |
383d0b05 | 936 | rc = __deliver_floating_interrupt(vcpu, inti); |
ba5c1e9b CO |
937 | kfree(inti); |
938 | } | |
79395031 | 939 | } while (!rc && deliver); |
ba5c1e9b | 940 | } |
79395031 JF |
941 | |
942 | return rc; | |
ba5c1e9b CO |
943 | } |
944 | ||
383d0b05 | 945 | static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
946 | { |
947 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
948 | ||
383d0b05 | 949 | li->irq.pgm = irq->u.pgm; |
9185124e | 950 | set_bit(IRQ_PEND_PROG, &li->pending_irqs); |
0146a7b0 JF |
951 | return 0; |
952 | } | |
953 | ||
ba5c1e9b CO |
954 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) |
955 | { | |
180c12fb | 956 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
383d0b05 | 957 | struct kvm_s390_irq irq; |
ba5c1e9b CO |
958 | |
959 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); | |
383d0b05 JF |
960 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, code, |
961 | 0, 1); | |
4ae3c081 | 962 | spin_lock(&li->lock); |
383d0b05 JF |
963 | irq.u.pgm.code = code; |
964 | __inject_prog(vcpu, &irq); | |
d0321a24 | 965 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 966 | spin_unlock(&li->lock); |
bcd84683 JF |
967 | return 0; |
968 | } | |
969 | ||
970 | int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, | |
971 | struct kvm_s390_pgm_info *pgm_info) | |
972 | { | |
973 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 974 | struct kvm_s390_irq irq; |
0146a7b0 | 975 | int rc; |
bcd84683 | 976 | |
bcd84683 JF |
977 | VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)", |
978 | pgm_info->code); | |
979 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
980 | pgm_info->code, 0, 1); | |
4ae3c081 | 981 | spin_lock(&li->lock); |
383d0b05 JF |
982 | irq.u.pgm = *pgm_info; |
983 | rc = __inject_prog(vcpu, &irq); | |
bcd84683 | 984 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 985 | spin_unlock(&li->lock); |
0146a7b0 JF |
986 | return rc; |
987 | } | |
988 | ||
383d0b05 | 989 | static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
990 | { |
991 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
992 | ||
383d0b05 JF |
993 | VCPU_EVENT(vcpu, 3, "inject: external irq params:%x, params2:%llx", |
994 | irq->u.ext.ext_params, irq->u.ext.ext_params2); | |
995 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, | |
996 | irq->u.ext.ext_params, | |
997 | irq->u.ext.ext_params2, 2); | |
998 | ||
999 | li->irq.ext = irq->u.ext; | |
1000 | set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
0146a7b0 JF |
1001 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
1002 | return 0; | |
1003 | } | |
1004 | ||
ea5f4969 DH |
1005 | static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id) |
1006 | { | |
1007 | unsigned char new_val, old_val; | |
1008 | uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
1009 | ||
1010 | new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK); | |
1011 | old_val = *sigp_ctrl & ~SIGP_CTRL_C; | |
1012 | if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) { | |
1013 | /* another external call is pending */ | |
1014 | return -EBUSY; | |
1015 | } | |
1016 | atomic_set_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags); | |
1017 | return 0; | |
1018 | } | |
1019 | ||
0675d92d | 1020 | static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1021 | { |
1022 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1023 | struct kvm_s390_extcall_info *extcall = &li->irq.extcall; |
ea5f4969 | 1024 | uint16_t src_id = irq->u.extcall.code; |
0146a7b0 JF |
1025 | |
1026 | VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u", | |
ea5f4969 | 1027 | src_id); |
383d0b05 | 1028 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, |
ea5f4969 DH |
1029 | src_id, 0, 2); |
1030 | ||
1031 | /* sending vcpu invalid */ | |
1032 | if (src_id >= KVM_MAX_VCPUS || | |
1033 | kvm_get_vcpu(vcpu->kvm, src_id) == NULL) | |
1034 | return -EINVAL; | |
1035 | ||
1036 | if (sclp_has_sigpif()) | |
1037 | return __inject_extcall_sigpif(vcpu, src_id); | |
383d0b05 | 1038 | |
ea5f4969 DH |
1039 | if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) |
1040 | return -EBUSY; | |
383d0b05 | 1041 | *extcall = irq->u.extcall; |
0146a7b0 JF |
1042 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
1043 | return 0; | |
1044 | } | |
1045 | ||
383d0b05 | 1046 | static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1047 | { |
1048 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1049 | struct kvm_s390_prefix_info *prefix = &li->irq.prefix; |
0146a7b0 JF |
1050 | |
1051 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)", | |
556cc0da | 1052 | irq->u.prefix.address); |
383d0b05 | 1053 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, |
556cc0da | 1054 | irq->u.prefix.address, 0, 2); |
383d0b05 | 1055 | |
a3a9c59a DH |
1056 | if (!is_vcpu_stopped(vcpu)) |
1057 | return -EBUSY; | |
1058 | ||
383d0b05 JF |
1059 | *prefix = irq->u.prefix; |
1060 | set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
0146a7b0 JF |
1061 | return 0; |
1062 | } | |
1063 | ||
6cddd432 | 1064 | #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) |
383d0b05 | 1065 | static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1066 | { |
1067 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2822545f | 1068 | struct kvm_s390_stop_info *stop = &li->irq.stop; |
6cddd432 | 1069 | int rc = 0; |
0146a7b0 | 1070 | |
383d0b05 JF |
1071 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0, 2); |
1072 | ||
2822545f DH |
1073 | if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) |
1074 | return -EINVAL; | |
1075 | ||
6cddd432 DH |
1076 | if (is_vcpu_stopped(vcpu)) { |
1077 | if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) | |
1078 | rc = kvm_s390_store_status_unloaded(vcpu, | |
1079 | KVM_S390_STORE_STATUS_NOADDR); | |
1080 | return rc; | |
1081 | } | |
1082 | ||
1083 | if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) | |
1084 | return -EBUSY; | |
2822545f | 1085 | stop->flags = irq->u.stop.flags; |
6cddd432 | 1086 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); |
0146a7b0 JF |
1087 | return 0; |
1088 | } | |
1089 | ||
1090 | static int __inject_sigp_restart(struct kvm_vcpu *vcpu, | |
383d0b05 | 1091 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1092 | { |
1093 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1094 | ||
383d0b05 JF |
1095 | VCPU_EVENT(vcpu, 3, "inject: restart type %llx", irq->type); |
1096 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0, 2); | |
1097 | ||
1098 | set_bit(IRQ_PEND_RESTART, &li->pending_irqs); | |
0146a7b0 JF |
1099 | return 0; |
1100 | } | |
1101 | ||
1102 | static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, | |
383d0b05 | 1103 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1104 | { |
1105 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1106 | ||
383d0b05 JF |
1107 | VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", |
1108 | irq->u.emerg.code); | |
1109 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, | |
49538d12 | 1110 | irq->u.emerg.code, 0, 2); |
383d0b05 | 1111 | |
49538d12 | 1112 | set_bit(irq->u.emerg.code, li->sigp_emerg_pending); |
383d0b05 | 1113 | set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
0146a7b0 JF |
1114 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
1115 | return 0; | |
1116 | } | |
1117 | ||
383d0b05 | 1118 | static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1119 | { |
1120 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1121 | struct kvm_s390_mchk_info *mchk = &li->irq.mchk; |
0146a7b0 JF |
1122 | |
1123 | VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx", | |
556cc0da | 1124 | irq->u.mchk.mcic); |
383d0b05 | 1125 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, |
556cc0da | 1126 | irq->u.mchk.mcic, 2); |
383d0b05 JF |
1127 | |
1128 | /* | |
fc2020cf JF |
1129 | * Because repressible machine checks can be indicated along with |
1130 | * exigent machine checks (PoP, Chapter 11, Interruption action) | |
1131 | * we need to combine cr14, mcic and external damage code. | |
1132 | * Failing storage address and the logout area should not be or'ed | |
1133 | * together, we just indicate the last occurrence of the corresponding | |
1134 | * machine check | |
383d0b05 | 1135 | */ |
fc2020cf | 1136 | mchk->cr14 |= irq->u.mchk.cr14; |
383d0b05 | 1137 | mchk->mcic |= irq->u.mchk.mcic; |
fc2020cf JF |
1138 | mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; |
1139 | mchk->failing_storage_address = irq->u.mchk.failing_storage_address; | |
1140 | memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, | |
1141 | sizeof(mchk->fixed_logout)); | |
383d0b05 JF |
1142 | if (mchk->mcic & MCHK_EX_MASK) |
1143 | set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
1144 | else if (mchk->mcic & MCHK_REP_MASK) | |
1145 | set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
0146a7b0 JF |
1146 | return 0; |
1147 | } | |
1148 | ||
383d0b05 | 1149 | static int __inject_ckc(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1150 | { |
1151 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1152 | ||
383d0b05 JF |
1153 | VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CLOCK_COMP); |
1154 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, | |
1155 | 0, 0, 2); | |
1156 | ||
1157 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
0146a7b0 JF |
1158 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
1159 | return 0; | |
1160 | } | |
1161 | ||
383d0b05 | 1162 | static int __inject_cpu_timer(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1163 | { |
1164 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1165 | ||
383d0b05 JF |
1166 | VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CPU_TIMER); |
1167 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, | |
1168 | 0, 0, 2); | |
1169 | ||
1170 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
0146a7b0 | 1171 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
ba5c1e9b CO |
1172 | return 0; |
1173 | } | |
1174 | ||
383d0b05 | 1175 | |
fa6b7fe9 CH |
1176 | struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
1177 | u64 cr6, u64 schid) | |
1178 | { | |
1179 | struct kvm_s390_float_interrupt *fi; | |
1180 | struct kvm_s390_interrupt_info *inti, *iter; | |
1181 | ||
1182 | if ((!schid && !cr6) || (schid && cr6)) | |
1183 | return NULL; | |
fa6b7fe9 CH |
1184 | fi = &kvm->arch.float_int; |
1185 | spin_lock(&fi->lock); | |
1186 | inti = NULL; | |
1187 | list_for_each_entry(iter, &fi->list, list) { | |
1188 | if (!is_ioint(iter->type)) | |
1189 | continue; | |
79fd50c6 CH |
1190 | if (cr6 && |
1191 | ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0)) | |
fa6b7fe9 CH |
1192 | continue; |
1193 | if (schid) { | |
1194 | if (((schid & 0x00000000ffff0000) >> 16) != | |
1195 | iter->io.subchannel_id) | |
1196 | continue; | |
1197 | if ((schid & 0x000000000000ffff) != | |
1198 | iter->io.subchannel_nr) | |
1199 | continue; | |
1200 | } | |
1201 | inti = iter; | |
1202 | break; | |
1203 | } | |
a91b8ebe | 1204 | if (inti) { |
fa6b7fe9 | 1205 | list_del_init(&inti->list); |
a91b8ebe JF |
1206 | fi->irq_count--; |
1207 | } | |
fa6b7fe9 CH |
1208 | if (list_empty(&fi->list)) |
1209 | atomic_set(&fi->active, 0); | |
1210 | spin_unlock(&fi->lock); | |
fa6b7fe9 CH |
1211 | return inti; |
1212 | } | |
ba5c1e9b | 1213 | |
a91b8ebe | 1214 | static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) |
ba5c1e9b | 1215 | { |
180c12fb CB |
1216 | struct kvm_s390_local_interrupt *li; |
1217 | struct kvm_s390_float_interrupt *fi; | |
c05c4186 | 1218 | struct kvm_s390_interrupt_info *iter; |
1ee0bc55 | 1219 | struct kvm_vcpu *dst_vcpu = NULL; |
ba5c1e9b | 1220 | int sigcpu; |
a91b8ebe | 1221 | int rc = 0; |
ba5c1e9b | 1222 | |
c05c4186 JF |
1223 | fi = &kvm->arch.float_int; |
1224 | spin_lock(&fi->lock); | |
a91b8ebe JF |
1225 | if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) { |
1226 | rc = -EINVAL; | |
1227 | goto unlock_fi; | |
1228 | } | |
1229 | fi->irq_count++; | |
c05c4186 JF |
1230 | if (!is_ioint(inti->type)) { |
1231 | list_add_tail(&inti->list, &fi->list); | |
1232 | } else { | |
1233 | u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word); | |
1234 | ||
1235 | /* Keep I/O interrupts sorted in isc order. */ | |
1236 | list_for_each_entry(iter, &fi->list, list) { | |
1237 | if (!is_ioint(iter->type)) | |
1238 | continue; | |
1239 | if (int_word_to_isc_bits(iter->io.io_int_word) | |
1240 | <= isc_bits) | |
1241 | continue; | |
1242 | break; | |
1243 | } | |
1244 | list_add_tail(&inti->list, &iter->list); | |
1245 | } | |
1246 | atomic_set(&fi->active, 1); | |
1247 | sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); | |
1248 | if (sigcpu == KVM_MAX_VCPUS) { | |
1249 | do { | |
1250 | sigcpu = fi->next_rr_cpu++; | |
1251 | if (sigcpu == KVM_MAX_VCPUS) | |
1252 | sigcpu = fi->next_rr_cpu = 0; | |
1ee0bc55 | 1253 | } while (kvm_get_vcpu(kvm, sigcpu) == NULL); |
c05c4186 | 1254 | } |
1ee0bc55 JF |
1255 | dst_vcpu = kvm_get_vcpu(kvm, sigcpu); |
1256 | li = &dst_vcpu->arch.local_int; | |
4ae3c081 | 1257 | spin_lock(&li->lock); |
da00fcbd CB |
1258 | switch (inti->type) { |
1259 | case KVM_S390_MCHK: | |
1260 | atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags); | |
1261 | break; | |
1262 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1263 | atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags); | |
1264 | break; | |
1265 | default: | |
1266 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
1267 | break; | |
1268 | } | |
4ae3c081 | 1269 | spin_unlock(&li->lock); |
0e9c85a5 | 1270 | kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu)); |
a91b8ebe | 1271 | unlock_fi: |
c05c4186 | 1272 | spin_unlock(&fi->lock); |
a91b8ebe | 1273 | return rc; |
c05c4186 JF |
1274 | } |
1275 | ||
1276 | int kvm_s390_inject_vm(struct kvm *kvm, | |
1277 | struct kvm_s390_interrupt *s390int) | |
1278 | { | |
1279 | struct kvm_s390_interrupt_info *inti; | |
428d53be | 1280 | int rc; |
c05c4186 | 1281 | |
ba5c1e9b CO |
1282 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
1283 | if (!inti) | |
1284 | return -ENOMEM; | |
1285 | ||
c05c4186 JF |
1286 | inti->type = s390int->type; |
1287 | switch (inti->type) { | |
ba5c1e9b | 1288 | case KVM_S390_INT_VIRTIO: |
33e19115 | 1289 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b | 1290 | s390int->parm, s390int->parm64); |
ba5c1e9b CO |
1291 | inti->ext.ext_params = s390int->parm; |
1292 | inti->ext.ext_params2 = s390int->parm64; | |
1293 | break; | |
1294 | case KVM_S390_INT_SERVICE: | |
1295 | VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); | |
ba5c1e9b CO |
1296 | inti->ext.ext_params = s390int->parm; |
1297 | break; | |
3c038e6b DD |
1298 | case KVM_S390_INT_PFAULT_DONE: |
1299 | inti->type = s390int->type; | |
1300 | inti->ext.ext_params2 = s390int->parm64; | |
1301 | break; | |
48a3e950 CH |
1302 | case KVM_S390_MCHK: |
1303 | VM_EVENT(kvm, 5, "inject: machine check parm64:%llx", | |
1304 | s390int->parm64); | |
48a3e950 CH |
1305 | inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
1306 | inti->mchk.mcic = s390int->parm64; | |
1307 | break; | |
d8346b7d | 1308 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
c05c4186 | 1309 | if (inti->type & IOINT_AI_MASK) |
d8346b7d CH |
1310 | VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)"); |
1311 | else | |
1312 | VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x", | |
1313 | s390int->type & IOINT_CSSID_MASK, | |
1314 | s390int->type & IOINT_SSID_MASK, | |
1315 | s390int->type & IOINT_SCHID_MASK); | |
d8346b7d CH |
1316 | inti->io.subchannel_id = s390int->parm >> 16; |
1317 | inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; | |
1318 | inti->io.io_int_parm = s390int->parm64 >> 32; | |
1319 | inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; | |
1320 | break; | |
ba5c1e9b CO |
1321 | default: |
1322 | kfree(inti); | |
1323 | return -EINVAL; | |
1324 | } | |
ade38c31 CH |
1325 | trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
1326 | 2); | |
ba5c1e9b | 1327 | |
428d53be DH |
1328 | rc = __inject_vm(kvm, inti); |
1329 | if (rc) | |
1330 | kfree(inti); | |
1331 | return rc; | |
ba5c1e9b CO |
1332 | } |
1333 | ||
2f32d4ea CH |
1334 | void kvm_s390_reinject_io_int(struct kvm *kvm, |
1335 | struct kvm_s390_interrupt_info *inti) | |
1336 | { | |
1337 | __inject_vm(kvm, inti); | |
1338 | } | |
1339 | ||
383d0b05 JF |
1340 | int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
1341 | struct kvm_s390_irq *irq) | |
1342 | { | |
1343 | irq->type = s390int->type; | |
1344 | switch (irq->type) { | |
1345 | case KVM_S390_PROGRAM_INT: | |
1346 | if (s390int->parm & 0xffff0000) | |
1347 | return -EINVAL; | |
1348 | irq->u.pgm.code = s390int->parm; | |
1349 | break; | |
1350 | case KVM_S390_SIGP_SET_PREFIX: | |
1351 | irq->u.prefix.address = s390int->parm; | |
1352 | break; | |
2822545f DH |
1353 | case KVM_S390_SIGP_STOP: |
1354 | irq->u.stop.flags = s390int->parm; | |
1355 | break; | |
383d0b05 JF |
1356 | case KVM_S390_INT_EXTERNAL_CALL: |
1357 | if (irq->u.extcall.code & 0xffff0000) | |
1358 | return -EINVAL; | |
1359 | irq->u.extcall.code = s390int->parm; | |
1360 | break; | |
1361 | case KVM_S390_INT_EMERGENCY: | |
1362 | if (irq->u.emerg.code & 0xffff0000) | |
1363 | return -EINVAL; | |
1364 | irq->u.emerg.code = s390int->parm; | |
1365 | break; | |
1366 | case KVM_S390_MCHK: | |
1367 | irq->u.mchk.mcic = s390int->parm64; | |
1368 | break; | |
1369 | } | |
1370 | return 0; | |
1371 | } | |
1372 | ||
6cddd432 DH |
1373 | int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) |
1374 | { | |
1375 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1376 | ||
1377 | return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1378 | } | |
1379 | ||
1380 | void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) | |
1381 | { | |
1382 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1383 | ||
1384 | spin_lock(&li->lock); | |
1385 | li->irq.stop.flags = 0; | |
1386 | clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1387 | spin_unlock(&li->lock); | |
1388 | } | |
1389 | ||
383d0b05 | 1390 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
ba5c1e9b | 1391 | { |
0146a7b0 | 1392 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0146a7b0 | 1393 | int rc; |
ba5c1e9b | 1394 | |
0146a7b0 | 1395 | spin_lock(&li->lock); |
383d0b05 | 1396 | switch (irq->type) { |
ba5c1e9b | 1397 | case KVM_S390_PROGRAM_INT: |
ba5c1e9b | 1398 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", |
383d0b05 JF |
1399 | irq->u.pgm.code); |
1400 | rc = __inject_prog(vcpu, irq); | |
ba5c1e9b | 1401 | break; |
b7e6e4d3 | 1402 | case KVM_S390_SIGP_SET_PREFIX: |
383d0b05 | 1403 | rc = __inject_set_prefix(vcpu, irq); |
b7e6e4d3 | 1404 | break; |
ba5c1e9b | 1405 | case KVM_S390_SIGP_STOP: |
383d0b05 | 1406 | rc = __inject_sigp_stop(vcpu, irq); |
0146a7b0 | 1407 | break; |
ba5c1e9b | 1408 | case KVM_S390_RESTART: |
383d0b05 | 1409 | rc = __inject_sigp_restart(vcpu, irq); |
0146a7b0 | 1410 | break; |
e029ae5b | 1411 | case KVM_S390_INT_CLOCK_COMP: |
383d0b05 | 1412 | rc = __inject_ckc(vcpu); |
0146a7b0 | 1413 | break; |
e029ae5b | 1414 | case KVM_S390_INT_CPU_TIMER: |
383d0b05 | 1415 | rc = __inject_cpu_timer(vcpu); |
82a12737 | 1416 | break; |
7697e71f | 1417 | case KVM_S390_INT_EXTERNAL_CALL: |
383d0b05 | 1418 | rc = __inject_extcall(vcpu, irq); |
82a12737 | 1419 | break; |
ba5c1e9b | 1420 | case KVM_S390_INT_EMERGENCY: |
383d0b05 | 1421 | rc = __inject_sigp_emergency(vcpu, irq); |
ba5c1e9b | 1422 | break; |
48a3e950 | 1423 | case KVM_S390_MCHK: |
383d0b05 | 1424 | rc = __inject_mchk(vcpu, irq); |
48a3e950 | 1425 | break; |
3c038e6b | 1426 | case KVM_S390_INT_PFAULT_INIT: |
383d0b05 | 1427 | rc = __inject_pfault_init(vcpu, irq); |
3c038e6b | 1428 | break; |
ba5c1e9b CO |
1429 | case KVM_S390_INT_VIRTIO: |
1430 | case KVM_S390_INT_SERVICE: | |
d8346b7d | 1431 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
ba5c1e9b | 1432 | default: |
0146a7b0 | 1433 | rc = -EINVAL; |
ba5c1e9b | 1434 | } |
4ae3c081 | 1435 | spin_unlock(&li->lock); |
0146a7b0 JF |
1436 | if (!rc) |
1437 | kvm_s390_vcpu_wakeup(vcpu); | |
0146a7b0 | 1438 | return rc; |
ba5c1e9b | 1439 | } |
c05c4186 | 1440 | |
67335e63 | 1441 | void kvm_s390_clear_float_irqs(struct kvm *kvm) |
c05c4186 JF |
1442 | { |
1443 | struct kvm_s390_float_interrupt *fi; | |
1444 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
1445 | ||
c05c4186 JF |
1446 | fi = &kvm->arch.float_int; |
1447 | spin_lock(&fi->lock); | |
1448 | list_for_each_entry_safe(inti, n, &fi->list, list) { | |
1449 | list_del(&inti->list); | |
1450 | kfree(inti); | |
1451 | } | |
a91b8ebe | 1452 | fi->irq_count = 0; |
c05c4186 JF |
1453 | atomic_set(&fi->active, 0); |
1454 | spin_unlock(&fi->lock); | |
c05c4186 JF |
1455 | } |
1456 | ||
1457 | static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti, | |
1458 | u8 *addr) | |
1459 | { | |
1460 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1461 | struct kvm_s390_irq irq = {0}; | |
1462 | ||
1463 | irq.type = inti->type; | |
1464 | switch (inti->type) { | |
3c038e6b DD |
1465 | case KVM_S390_INT_PFAULT_INIT: |
1466 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1467 | case KVM_S390_INT_VIRTIO: |
1468 | case KVM_S390_INT_SERVICE: | |
1469 | irq.u.ext = inti->ext; | |
1470 | break; | |
1471 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1472 | irq.u.io = inti->io; | |
1473 | break; | |
1474 | case KVM_S390_MCHK: | |
1475 | irq.u.mchk = inti->mchk; | |
1476 | break; | |
1477 | default: | |
1478 | return -EINVAL; | |
1479 | } | |
1480 | ||
1481 | if (copy_to_user(uptr, &irq, sizeof(irq))) | |
1482 | return -EFAULT; | |
1483 | ||
1484 | return 0; | |
1485 | } | |
1486 | ||
1487 | static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len) | |
1488 | { | |
1489 | struct kvm_s390_interrupt_info *inti; | |
1490 | struct kvm_s390_float_interrupt *fi; | |
1491 | int ret = 0; | |
1492 | int n = 0; | |
1493 | ||
c05c4186 JF |
1494 | fi = &kvm->arch.float_int; |
1495 | spin_lock(&fi->lock); | |
1496 | ||
1497 | list_for_each_entry(inti, &fi->list, list) { | |
1498 | if (len < sizeof(struct kvm_s390_irq)) { | |
1499 | /* signal userspace to try again */ | |
1500 | ret = -ENOMEM; | |
1501 | break; | |
1502 | } | |
1503 | ret = copy_irq_to_user(inti, buf); | |
1504 | if (ret) | |
1505 | break; | |
1506 | buf += sizeof(struct kvm_s390_irq); | |
1507 | len -= sizeof(struct kvm_s390_irq); | |
1508 | n++; | |
1509 | } | |
1510 | ||
1511 | spin_unlock(&fi->lock); | |
c05c4186 JF |
1512 | |
1513 | return ret < 0 ? ret : n; | |
1514 | } | |
1515 | ||
1516 | static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) | |
1517 | { | |
1518 | int r; | |
1519 | ||
1520 | switch (attr->group) { | |
1521 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
1522 | r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr, | |
1523 | attr->attr); | |
1524 | break; | |
1525 | default: | |
1526 | r = -EINVAL; | |
1527 | } | |
1528 | ||
1529 | return r; | |
1530 | } | |
1531 | ||
1532 | static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, | |
1533 | u64 addr) | |
1534 | { | |
1535 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1536 | void *target = NULL; | |
1537 | void __user *source; | |
1538 | u64 size; | |
1539 | ||
1540 | if (get_user(inti->type, (u64 __user *)addr)) | |
1541 | return -EFAULT; | |
1542 | ||
1543 | switch (inti->type) { | |
3c038e6b DD |
1544 | case KVM_S390_INT_PFAULT_INIT: |
1545 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1546 | case KVM_S390_INT_VIRTIO: |
1547 | case KVM_S390_INT_SERVICE: | |
1548 | target = (void *) &inti->ext; | |
1549 | source = &uptr->u.ext; | |
1550 | size = sizeof(inti->ext); | |
1551 | break; | |
1552 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1553 | target = (void *) &inti->io; | |
1554 | source = &uptr->u.io; | |
1555 | size = sizeof(inti->io); | |
1556 | break; | |
1557 | case KVM_S390_MCHK: | |
1558 | target = (void *) &inti->mchk; | |
1559 | source = &uptr->u.mchk; | |
1560 | size = sizeof(inti->mchk); | |
1561 | break; | |
1562 | default: | |
1563 | return -EINVAL; | |
1564 | } | |
1565 | ||
1566 | if (copy_from_user(target, source, size)) | |
1567 | return -EFAULT; | |
1568 | ||
1569 | return 0; | |
1570 | } | |
1571 | ||
1572 | static int enqueue_floating_irq(struct kvm_device *dev, | |
1573 | struct kvm_device_attr *attr) | |
1574 | { | |
1575 | struct kvm_s390_interrupt_info *inti = NULL; | |
1576 | int r = 0; | |
1577 | int len = attr->attr; | |
1578 | ||
1579 | if (len % sizeof(struct kvm_s390_irq) != 0) | |
1580 | return -EINVAL; | |
1581 | else if (len > KVM_S390_FLIC_MAX_BUFFER) | |
1582 | return -EINVAL; | |
1583 | ||
1584 | while (len >= sizeof(struct kvm_s390_irq)) { | |
1585 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
1586 | if (!inti) | |
1587 | return -ENOMEM; | |
1588 | ||
1589 | r = copy_irq_from_user(inti, attr->addr); | |
1590 | if (r) { | |
1591 | kfree(inti); | |
1592 | return r; | |
1593 | } | |
a91b8ebe JF |
1594 | r = __inject_vm(dev->kvm, inti); |
1595 | if (r) { | |
1596 | kfree(inti); | |
1597 | return r; | |
1598 | } | |
c05c4186 JF |
1599 | len -= sizeof(struct kvm_s390_irq); |
1600 | attr->addr += sizeof(struct kvm_s390_irq); | |
1601 | } | |
1602 | ||
1603 | return r; | |
1604 | } | |
1605 | ||
841b91c5 CH |
1606 | static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
1607 | { | |
1608 | if (id >= MAX_S390_IO_ADAPTERS) | |
1609 | return NULL; | |
1610 | return kvm->arch.adapters[id]; | |
1611 | } | |
1612 | ||
1613 | static int register_io_adapter(struct kvm_device *dev, | |
1614 | struct kvm_device_attr *attr) | |
1615 | { | |
1616 | struct s390_io_adapter *adapter; | |
1617 | struct kvm_s390_io_adapter adapter_info; | |
1618 | ||
1619 | if (copy_from_user(&adapter_info, | |
1620 | (void __user *)attr->addr, sizeof(adapter_info))) | |
1621 | return -EFAULT; | |
1622 | ||
1623 | if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || | |
1624 | (dev->kvm->arch.adapters[adapter_info.id] != NULL)) | |
1625 | return -EINVAL; | |
1626 | ||
1627 | adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); | |
1628 | if (!adapter) | |
1629 | return -ENOMEM; | |
1630 | ||
1631 | INIT_LIST_HEAD(&adapter->maps); | |
1632 | init_rwsem(&adapter->maps_lock); | |
1633 | atomic_set(&adapter->nr_maps, 0); | |
1634 | adapter->id = adapter_info.id; | |
1635 | adapter->isc = adapter_info.isc; | |
1636 | adapter->maskable = adapter_info.maskable; | |
1637 | adapter->masked = false; | |
1638 | adapter->swap = adapter_info.swap; | |
1639 | dev->kvm->arch.adapters[adapter->id] = adapter; | |
1640 | ||
1641 | return 0; | |
1642 | } | |
1643 | ||
1644 | int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) | |
1645 | { | |
1646 | int ret; | |
1647 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1648 | ||
1649 | if (!adapter || !adapter->maskable) | |
1650 | return -EINVAL; | |
1651 | ret = adapter->masked; | |
1652 | adapter->masked = masked; | |
1653 | return ret; | |
1654 | } | |
1655 | ||
1656 | static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) | |
1657 | { | |
1658 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1659 | struct s390_map_info *map; | |
1660 | int ret; | |
1661 | ||
1662 | if (!adapter || !addr) | |
1663 | return -EINVAL; | |
1664 | ||
1665 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
1666 | if (!map) { | |
1667 | ret = -ENOMEM; | |
1668 | goto out; | |
1669 | } | |
1670 | INIT_LIST_HEAD(&map->list); | |
1671 | map->guest_addr = addr; | |
6e0a0431 | 1672 | map->addr = gmap_translate(kvm->arch.gmap, addr); |
841b91c5 CH |
1673 | if (map->addr == -EFAULT) { |
1674 | ret = -EFAULT; | |
1675 | goto out; | |
1676 | } | |
1677 | ret = get_user_pages_fast(map->addr, 1, 1, &map->page); | |
1678 | if (ret < 0) | |
1679 | goto out; | |
1680 | BUG_ON(ret != 1); | |
1681 | down_write(&adapter->maps_lock); | |
1682 | if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { | |
1683 | list_add_tail(&map->list, &adapter->maps); | |
1684 | ret = 0; | |
1685 | } else { | |
1686 | put_page(map->page); | |
1687 | ret = -EINVAL; | |
1688 | } | |
1689 | up_write(&adapter->maps_lock); | |
1690 | out: | |
1691 | if (ret) | |
1692 | kfree(map); | |
1693 | return ret; | |
1694 | } | |
1695 | ||
1696 | static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) | |
1697 | { | |
1698 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1699 | struct s390_map_info *map, *tmp; | |
1700 | int found = 0; | |
1701 | ||
1702 | if (!adapter || !addr) | |
1703 | return -EINVAL; | |
1704 | ||
1705 | down_write(&adapter->maps_lock); | |
1706 | list_for_each_entry_safe(map, tmp, &adapter->maps, list) { | |
1707 | if (map->guest_addr == addr) { | |
1708 | found = 1; | |
1709 | atomic_dec(&adapter->nr_maps); | |
1710 | list_del(&map->list); | |
1711 | put_page(map->page); | |
1712 | kfree(map); | |
1713 | break; | |
1714 | } | |
1715 | } | |
1716 | up_write(&adapter->maps_lock); | |
1717 | ||
1718 | return found ? 0 : -EINVAL; | |
1719 | } | |
1720 | ||
1721 | void kvm_s390_destroy_adapters(struct kvm *kvm) | |
1722 | { | |
1723 | int i; | |
1724 | struct s390_map_info *map, *tmp; | |
1725 | ||
1726 | for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { | |
1727 | if (!kvm->arch.adapters[i]) | |
1728 | continue; | |
1729 | list_for_each_entry_safe(map, tmp, | |
1730 | &kvm->arch.adapters[i]->maps, list) { | |
1731 | list_del(&map->list); | |
1732 | put_page(map->page); | |
1733 | kfree(map); | |
1734 | } | |
1735 | kfree(kvm->arch.adapters[i]); | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | static int modify_io_adapter(struct kvm_device *dev, | |
1740 | struct kvm_device_attr *attr) | |
1741 | { | |
1742 | struct kvm_s390_io_adapter_req req; | |
1743 | struct s390_io_adapter *adapter; | |
1744 | int ret; | |
1745 | ||
1746 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
1747 | return -EFAULT; | |
1748 | ||
1749 | adapter = get_io_adapter(dev->kvm, req.id); | |
1750 | if (!adapter) | |
1751 | return -EINVAL; | |
1752 | switch (req.type) { | |
1753 | case KVM_S390_IO_ADAPTER_MASK: | |
1754 | ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); | |
1755 | if (ret > 0) | |
1756 | ret = 0; | |
1757 | break; | |
1758 | case KVM_S390_IO_ADAPTER_MAP: | |
1759 | ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); | |
1760 | break; | |
1761 | case KVM_S390_IO_ADAPTER_UNMAP: | |
1762 | ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); | |
1763 | break; | |
1764 | default: | |
1765 | ret = -EINVAL; | |
1766 | } | |
1767 | ||
1768 | return ret; | |
1769 | } | |
1770 | ||
c05c4186 JF |
1771 | static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
1772 | { | |
1773 | int r = 0; | |
3c038e6b DD |
1774 | unsigned int i; |
1775 | struct kvm_vcpu *vcpu; | |
c05c4186 JF |
1776 | |
1777 | switch (attr->group) { | |
1778 | case KVM_DEV_FLIC_ENQUEUE: | |
1779 | r = enqueue_floating_irq(dev, attr); | |
1780 | break; | |
1781 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
67335e63 | 1782 | kvm_s390_clear_float_irqs(dev->kvm); |
c05c4186 | 1783 | break; |
3c038e6b DD |
1784 | case KVM_DEV_FLIC_APF_ENABLE: |
1785 | dev->kvm->arch.gmap->pfault_enabled = 1; | |
1786 | break; | |
1787 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
1788 | dev->kvm->arch.gmap->pfault_enabled = 0; | |
1789 | /* | |
1790 | * Make sure no async faults are in transition when | |
1791 | * clearing the queues. So we don't need to worry | |
1792 | * about late coming workers. | |
1793 | */ | |
1794 | synchronize_srcu(&dev->kvm->srcu); | |
1795 | kvm_for_each_vcpu(i, vcpu, dev->kvm) | |
1796 | kvm_clear_async_pf_completion_queue(vcpu); | |
1797 | break; | |
841b91c5 CH |
1798 | case KVM_DEV_FLIC_ADAPTER_REGISTER: |
1799 | r = register_io_adapter(dev, attr); | |
1800 | break; | |
1801 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
1802 | r = modify_io_adapter(dev, attr); | |
1803 | break; | |
c05c4186 JF |
1804 | default: |
1805 | r = -EINVAL; | |
1806 | } | |
1807 | ||
1808 | return r; | |
1809 | } | |
1810 | ||
1811 | static int flic_create(struct kvm_device *dev, u32 type) | |
1812 | { | |
1813 | if (!dev) | |
1814 | return -EINVAL; | |
1815 | if (dev->kvm->arch.flic) | |
1816 | return -EINVAL; | |
1817 | dev->kvm->arch.flic = dev; | |
1818 | return 0; | |
1819 | } | |
1820 | ||
1821 | static void flic_destroy(struct kvm_device *dev) | |
1822 | { | |
1823 | dev->kvm->arch.flic = NULL; | |
1824 | kfree(dev); | |
1825 | } | |
1826 | ||
1827 | /* s390 floating irq controller (flic) */ | |
1828 | struct kvm_device_ops kvm_flic_ops = { | |
1829 | .name = "kvm-flic", | |
1830 | .get_attr = flic_get_attr, | |
1831 | .set_attr = flic_set_attr, | |
1832 | .create = flic_create, | |
1833 | .destroy = flic_destroy, | |
1834 | }; | |
84223598 CH |
1835 | |
1836 | static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) | |
1837 | { | |
1838 | unsigned long bit; | |
1839 | ||
1840 | bit = bit_nr + (addr % PAGE_SIZE) * 8; | |
1841 | ||
1842 | return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; | |
1843 | } | |
1844 | ||
1845 | static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, | |
1846 | u64 addr) | |
1847 | { | |
1848 | struct s390_map_info *map; | |
1849 | ||
1850 | if (!adapter) | |
1851 | return NULL; | |
1852 | ||
1853 | list_for_each_entry(map, &adapter->maps, list) { | |
1854 | if (map->guest_addr == addr) | |
1855 | return map; | |
1856 | } | |
1857 | return NULL; | |
1858 | } | |
1859 | ||
1860 | static int adapter_indicators_set(struct kvm *kvm, | |
1861 | struct s390_io_adapter *adapter, | |
1862 | struct kvm_s390_adapter_int *adapter_int) | |
1863 | { | |
1864 | unsigned long bit; | |
1865 | int summary_set, idx; | |
1866 | struct s390_map_info *info; | |
1867 | void *map; | |
1868 | ||
1869 | info = get_map_info(adapter, adapter_int->ind_addr); | |
1870 | if (!info) | |
1871 | return -1; | |
1872 | map = page_address(info->page); | |
1873 | bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); | |
1874 | set_bit(bit, map); | |
1875 | idx = srcu_read_lock(&kvm->srcu); | |
1876 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
1877 | set_page_dirty_lock(info->page); | |
1878 | info = get_map_info(adapter, adapter_int->summary_addr); | |
1879 | if (!info) { | |
1880 | srcu_read_unlock(&kvm->srcu, idx); | |
1881 | return -1; | |
1882 | } | |
1883 | map = page_address(info->page); | |
1884 | bit = get_ind_bit(info->addr, adapter_int->summary_offset, | |
1885 | adapter->swap); | |
1886 | summary_set = test_and_set_bit(bit, map); | |
1887 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
1888 | set_page_dirty_lock(info->page); | |
1889 | srcu_read_unlock(&kvm->srcu, idx); | |
1890 | return summary_set ? 0 : 1; | |
1891 | } | |
1892 | ||
1893 | /* | |
1894 | * < 0 - not injected due to error | |
1895 | * = 0 - coalesced, summary indicator already active | |
1896 | * > 0 - injected interrupt | |
1897 | */ | |
1898 | static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, | |
1899 | struct kvm *kvm, int irq_source_id, int level, | |
1900 | bool line_status) | |
1901 | { | |
1902 | int ret; | |
1903 | struct s390_io_adapter *adapter; | |
1904 | ||
1905 | /* We're only interested in the 0->1 transition. */ | |
1906 | if (!level) | |
1907 | return 0; | |
1908 | adapter = get_io_adapter(kvm, e->adapter.adapter_id); | |
1909 | if (!adapter) | |
1910 | return -1; | |
1911 | down_read(&adapter->maps_lock); | |
1912 | ret = adapter_indicators_set(kvm, adapter, &e->adapter); | |
1913 | up_read(&adapter->maps_lock); | |
1914 | if ((ret > 0) && !adapter->masked) { | |
1915 | struct kvm_s390_interrupt s390int = { | |
1916 | .type = KVM_S390_INT_IO(1, 0, 0, 0), | |
1917 | .parm = 0, | |
1918 | .parm64 = (adapter->isc << 27) | 0x80000000, | |
1919 | }; | |
1920 | ret = kvm_s390_inject_vm(kvm, &s390int); | |
1921 | if (ret == 0) | |
1922 | ret = 1; | |
1923 | } | |
1924 | return ret; | |
1925 | } | |
1926 | ||
8ba918d4 | 1927 | int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
84223598 CH |
1928 | const struct kvm_irq_routing_entry *ue) |
1929 | { | |
1930 | int ret; | |
1931 | ||
1932 | switch (ue->type) { | |
1933 | case KVM_IRQ_ROUTING_S390_ADAPTER: | |
1934 | e->set = set_adapter_int; | |
1935 | e->adapter.summary_addr = ue->u.adapter.summary_addr; | |
1936 | e->adapter.ind_addr = ue->u.adapter.ind_addr; | |
1937 | e->adapter.summary_offset = ue->u.adapter.summary_offset; | |
1938 | e->adapter.ind_offset = ue->u.adapter.ind_offset; | |
1939 | e->adapter.adapter_id = ue->u.adapter.adapter_id; | |
1940 | ret = 0; | |
1941 | break; | |
1942 | default: | |
1943 | ret = -EINVAL; | |
1944 | } | |
1945 | ||
1946 | return ret; | |
1947 | } | |
1948 | ||
1949 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, | |
1950 | int irq_source_id, int level, bool line_status) | |
1951 | { | |
1952 | return -EINVAL; | |
1953 | } |