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Commit | Line | Data |
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ba5c1e9b | 1 | /* |
a53c8fab | 2 | * handling kvm guest interrupts |
ba5c1e9b | 3 | * |
33b412ac | 4 | * Copyright IBM Corp. 2008, 2015 |
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 | 20 | #include <asm/asm-offsets.h> |
33b412ac | 21 | #include <asm/dis.h> |
cbb870c8 | 22 | #include <asm/uaccess.h> |
ea5f4969 | 23 | #include <asm/sclp.h> |
ba5c1e9b CO |
24 | #include "kvm-s390.h" |
25 | #include "gaccess.h" | |
ade38c31 | 26 | #include "trace-s390.h" |
ba5c1e9b | 27 | |
d8346b7d CH |
28 | #define IOINT_SCHID_MASK 0x0000ffff |
29 | #define IOINT_SSID_MASK 0x00030000 | |
30 | #define IOINT_CSSID_MASK 0x03fc0000 | |
31 | #define IOINT_AI_MASK 0x04000000 | |
44c6ca3d | 32 | #define PFAULT_INIT 0x0600 |
60f90a14 JF |
33 | #define PFAULT_DONE 0x0680 |
34 | #define VIRTIO_PARAM 0x0d00 | |
d8346b7d CH |
35 | |
36 | static int is_ioint(u64 type) | |
37 | { | |
38 | return ((type & 0xfffe0000u) != 0xfffe0000u); | |
39 | } | |
40 | ||
3c038e6b | 41 | int psw_extint_disabled(struct kvm_vcpu *vcpu) |
ba5c1e9b CO |
42 | { |
43 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
44 | } | |
45 | ||
d8346b7d CH |
46 | static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
47 | { | |
48 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); | |
49 | } | |
50 | ||
48a3e950 CH |
51 | static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
52 | { | |
53 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); | |
54 | } | |
55 | ||
ba5c1e9b CO |
56 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
57 | { | |
58 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || | |
59 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || | |
60 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) | |
61 | return 0; | |
62 | return 1; | |
63 | } | |
64 | ||
bb78c5ec DH |
65 | static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
66 | { | |
67 | if (psw_extint_disabled(vcpu) || | |
68 | !(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
69 | return 0; | |
f71d0dc5 DH |
70 | if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
71 | /* No timer interrupts when single stepping */ | |
72 | return 0; | |
bb78c5ec DH |
73 | return 1; |
74 | } | |
75 | ||
79fd50c6 CH |
76 | static u64 int_word_to_isc_bits(u32 int_word) |
77 | { | |
78 | u8 isc = (int_word & 0x38000000) >> 27; | |
79 | ||
80 | return (0x80 >> isc) << 24; | |
81 | } | |
82 | ||
614aeab4 | 83 | static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu, |
180c12fb | 84 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
85 | { |
86 | switch (inti->type) { | |
7697e71f CE |
87 | case KVM_S390_INT_EXTERNAL_CALL: |
88 | if (psw_extint_disabled(vcpu)) | |
89 | return 0; | |
90 | if (vcpu->arch.sie_block->gcr[0] & 0x2000ul) | |
91 | return 1; | |
f346026e | 92 | return 0; |
ba5c1e9b CO |
93 | case KVM_S390_INT_EMERGENCY: |
94 | if (psw_extint_disabled(vcpu)) | |
95 | return 0; | |
96 | if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) | |
97 | return 1; | |
98 | return 0; | |
e029ae5b TH |
99 | case KVM_S390_INT_CLOCK_COMP: |
100 | return ckc_interrupts_enabled(vcpu); | |
101 | case KVM_S390_INT_CPU_TIMER: | |
102 | if (psw_extint_disabled(vcpu)) | |
103 | return 0; | |
104 | if (vcpu->arch.sie_block->gcr[0] & 0x400ul) | |
105 | return 1; | |
106 | return 0; | |
ba5c1e9b | 107 | case KVM_S390_INT_SERVICE: |
3c038e6b DD |
108 | case KVM_S390_INT_PFAULT_INIT: |
109 | case KVM_S390_INT_PFAULT_DONE: | |
ba5c1e9b CO |
110 | case KVM_S390_INT_VIRTIO: |
111 | if (psw_extint_disabled(vcpu)) | |
112 | return 0; | |
113 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
114 | return 1; | |
115 | return 0; | |
116 | case KVM_S390_PROGRAM_INT: | |
117 | case KVM_S390_SIGP_STOP: | |
118 | case KVM_S390_SIGP_SET_PREFIX: | |
119 | case KVM_S390_RESTART: | |
120 | return 1; | |
48a3e950 CH |
121 | case KVM_S390_MCHK: |
122 | if (psw_mchk_disabled(vcpu)) | |
123 | return 0; | |
124 | if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14) | |
125 | return 1; | |
126 | return 0; | |
d8346b7d CH |
127 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
128 | if (psw_ioint_disabled(vcpu)) | |
129 | return 0; | |
79fd50c6 CH |
130 | if (vcpu->arch.sie_block->gcr[6] & |
131 | int_word_to_isc_bits(inti->io.io_int_word)) | |
d8346b7d CH |
132 | return 1; |
133 | return 0; | |
ba5c1e9b | 134 | default: |
d8346b7d CH |
135 | printk(KERN_WARNING "illegal interrupt type %llx\n", |
136 | inti->type); | |
ba5c1e9b CO |
137 | BUG(); |
138 | } | |
139 | return 0; | |
140 | } | |
141 | ||
383d0b05 JF |
142 | static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu) |
143 | { | |
144 | return vcpu->arch.local_int.pending_irqs; | |
145 | } | |
146 | ||
147 | static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu) | |
148 | { | |
149 | unsigned long active_mask = pending_local_irqs(vcpu); | |
150 | ||
151 | if (psw_extint_disabled(vcpu)) | |
152 | active_mask &= ~IRQ_PEND_EXT_MASK; | |
153 | if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
154 | __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask); | |
155 | if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul)) | |
156 | __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask); | |
157 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
158 | __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask); | |
159 | if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul)) | |
160 | __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask); | |
161 | if (psw_mchk_disabled(vcpu)) | |
162 | active_mask &= ~IRQ_PEND_MCHK_MASK; | |
163 | ||
6cddd432 DH |
164 | /* |
165 | * STOP irqs will never be actively delivered. They are triggered via | |
166 | * intercept requests and cleared when the stop intercept is performed. | |
167 | */ | |
168 | __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask); | |
169 | ||
383d0b05 JF |
170 | return active_mask; |
171 | } | |
172 | ||
ba5c1e9b CO |
173 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
174 | { | |
ba5c1e9b CO |
175 | atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
176 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
177 | } | |
178 | ||
179 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
180 | { | |
ba5c1e9b CO |
181 | atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
182 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
183 | } | |
184 | ||
185 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
186 | { | |
4953919f DH |
187 | atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, |
188 | &vcpu->arch.sie_block->cpuflags); | |
ba5c1e9b | 189 | vcpu->arch.sie_block->lctl = 0x0000; |
27291e21 DH |
190 | vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
191 | ||
192 | if (guestdbg_enabled(vcpu)) { | |
193 | vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | | |
194 | LCTL_CR10 | LCTL_CR11); | |
195 | vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); | |
196 | } | |
ba5c1e9b CO |
197 | } |
198 | ||
199 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
200 | { | |
201 | atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); | |
202 | } | |
203 | ||
383d0b05 JF |
204 | static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) |
205 | { | |
206 | if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK)) | |
207 | return; | |
208 | if (psw_extint_disabled(vcpu)) | |
209 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
210 | else | |
211 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
212 | } | |
213 | ||
214 | static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) | |
215 | { | |
216 | if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK)) | |
217 | return; | |
218 | if (psw_mchk_disabled(vcpu)) | |
219 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
220 | else | |
221 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
222 | } | |
223 | ||
6cddd432 DH |
224 | static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu) |
225 | { | |
226 | if (kvm_s390_is_stop_irq_pending(vcpu)) | |
227 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
228 | } | |
229 | ||
383d0b05 JF |
230 | /* Set interception request for non-deliverable local interrupts */ |
231 | static void set_intercept_indicators_local(struct kvm_vcpu *vcpu) | |
232 | { | |
233 | set_intercept_indicators_ext(vcpu); | |
234 | set_intercept_indicators_mchk(vcpu); | |
6cddd432 | 235 | set_intercept_indicators_stop(vcpu); |
383d0b05 JF |
236 | } |
237 | ||
ba5c1e9b | 238 | static void __set_intercept_indicator(struct kvm_vcpu *vcpu, |
180c12fb | 239 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
240 | { |
241 | switch (inti->type) { | |
ba5c1e9b | 242 | case KVM_S390_INT_SERVICE: |
3c038e6b | 243 | case KVM_S390_INT_PFAULT_DONE: |
ba5c1e9b CO |
244 | case KVM_S390_INT_VIRTIO: |
245 | if (psw_extint_disabled(vcpu)) | |
246 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
247 | else | |
248 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
249 | break; | |
48a3e950 CH |
250 | case KVM_S390_MCHK: |
251 | if (psw_mchk_disabled(vcpu)) | |
252 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
253 | else | |
254 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
255 | break; | |
d8346b7d CH |
256 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
257 | if (psw_ioint_disabled(vcpu)) | |
258 | __set_cpuflag(vcpu, CPUSTAT_IO_INT); | |
259 | else | |
260 | vcpu->arch.sie_block->lctl |= LCTL_CR6; | |
261 | break; | |
ba5c1e9b CO |
262 | default: |
263 | BUG(); | |
264 | } | |
265 | } | |
266 | ||
8a2ef71b JF |
267 | static u16 get_ilc(struct kvm_vcpu *vcpu) |
268 | { | |
8a2ef71b JF |
269 | switch (vcpu->arch.sie_block->icptcode) { |
270 | case ICPT_INST: | |
271 | case ICPT_INSTPROGI: | |
272 | case ICPT_OPEREXC: | |
273 | case ICPT_PARTEXEC: | |
274 | case ICPT_IOINST: | |
275 | /* last instruction only stored for these icptcodes */ | |
33b412ac | 276 | return insn_length(vcpu->arch.sie_block->ipa >> 8); |
8a2ef71b JF |
277 | case ICPT_PROGI: |
278 | return vcpu->arch.sie_block->pgmilc; | |
279 | default: | |
280 | return 0; | |
281 | } | |
282 | } | |
283 | ||
0fb97abe JF |
284 | static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) |
285 | { | |
383d0b05 | 286 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
287 | int rc; |
288 | ||
289 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, | |
290 | 0, 0); | |
291 | ||
292 | rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, | |
293 | (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 294 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
295 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
296 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
297 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
298 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 299 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
99e20009 | 300 | return rc ? -EFAULT : 0; |
0fb97abe JF |
301 | } |
302 | ||
303 | static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) | |
304 | { | |
383d0b05 | 305 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
306 | int rc; |
307 | ||
308 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, | |
309 | 0, 0); | |
310 | ||
311 | rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP, | |
312 | (u16 __user *)__LC_EXT_INT_CODE); | |
467fc298 | 313 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
314 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
315 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
316 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
317 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 318 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
99e20009 | 319 | return rc ? -EFAULT : 0; |
0fb97abe JF |
320 | } |
321 | ||
383d0b05 | 322 | static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) |
0fb97abe | 323 | { |
383d0b05 JF |
324 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
325 | struct kvm_s390_ext_info ext; | |
0fb97abe JF |
326 | int rc; |
327 | ||
383d0b05 JF |
328 | spin_lock(&li->lock); |
329 | ext = li->irq.ext; | |
330 | clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
331 | li->irq.ext.ext_params2 = 0; | |
332 | spin_unlock(&li->lock); | |
333 | ||
0fb97abe | 334 | VCPU_EVENT(vcpu, 4, "interrupt: pfault init parm:%x,parm64:%llx", |
383d0b05 | 335 | 0, ext.ext_params2); |
0fb97abe JF |
336 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
337 | KVM_S390_INT_PFAULT_INIT, | |
383d0b05 | 338 | 0, ext.ext_params2); |
0fb97abe JF |
339 | |
340 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE); | |
341 | rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); | |
342 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
343 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
344 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
345 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 346 | rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); |
99e20009 | 347 | return rc ? -EFAULT : 0; |
0fb97abe JF |
348 | } |
349 | ||
383d0b05 | 350 | static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) |
0fb97abe | 351 | { |
383d0b05 JF |
352 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
353 | struct kvm_s390_mchk_info mchk; | |
bc17de7c | 354 | unsigned long adtl_status_addr; |
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); | |
bc17de7c EF |
375 | rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR, |
376 | &adtl_status_addr, sizeof(unsigned long)); | |
377 | rc |= kvm_s390_vcpu_store_adtl_status(vcpu, adtl_status_addr); | |
383d0b05 | 378 | rc |= put_guest_lc(vcpu, mchk.mcic, |
0fb97abe | 379 | (u64 __user *) __LC_MCCK_CODE); |
383d0b05 | 380 | rc |= put_guest_lc(vcpu, mchk.failing_storage_address, |
0fb97abe JF |
381 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); |
382 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, | |
383d0b05 | 383 | &mchk.fixed_logout, sizeof(mchk.fixed_logout)); |
0fb97abe JF |
384 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, |
385 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
386 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
387 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 388 | return rc ? -EFAULT : 0; |
0fb97abe JF |
389 | } |
390 | ||
391 | static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) | |
392 | { | |
383d0b05 | 393 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
394 | int rc; |
395 | ||
396 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); | |
397 | vcpu->stat.deliver_restart_signal++; | |
398 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); | |
399 | ||
400 | rc = write_guest_lc(vcpu, | |
401 | offsetof(struct _lowcore, restart_old_psw), | |
402 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
403 | rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw), | |
404 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 405 | clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
99e20009 | 406 | return rc ? -EFAULT : 0; |
0fb97abe JF |
407 | } |
408 | ||
383d0b05 | 409 | static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) |
0fb97abe | 410 | { |
383d0b05 JF |
411 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
412 | struct kvm_s390_prefix_info prefix; | |
413 | ||
414 | spin_lock(&li->lock); | |
415 | prefix = li->irq.prefix; | |
416 | li->irq.prefix.address = 0; | |
417 | clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
418 | spin_unlock(&li->lock); | |
0fb97abe | 419 | |
383d0b05 | 420 | VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address); |
0fb97abe JF |
421 | vcpu->stat.deliver_prefix_signal++; |
422 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
423 | KVM_S390_SIGP_SET_PREFIX, | |
383d0b05 | 424 | prefix.address, 0); |
0fb97abe | 425 | |
383d0b05 | 426 | kvm_s390_set_prefix(vcpu, prefix.address); |
0fb97abe JF |
427 | return 0; |
428 | } | |
429 | ||
383d0b05 | 430 | static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) |
0fb97abe | 431 | { |
383d0b05 | 432 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe | 433 | int rc; |
383d0b05 JF |
434 | int cpu_addr; |
435 | ||
436 | spin_lock(&li->lock); | |
437 | cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
438 | clear_bit(cpu_addr, li->sigp_emerg_pending); | |
439 | if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) | |
440 | clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); | |
441 | spin_unlock(&li->lock); | |
0fb97abe JF |
442 | |
443 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); | |
444 | vcpu->stat.deliver_emergency_signal++; | |
383d0b05 JF |
445 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
446 | cpu_addr, 0); | |
0fb97abe JF |
447 | |
448 | rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, | |
449 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 450 | rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
451 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
452 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
453 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
454 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 455 | return rc ? -EFAULT : 0; |
0fb97abe JF |
456 | } |
457 | ||
383d0b05 | 458 | static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) |
0fb97abe | 459 | { |
383d0b05 JF |
460 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
461 | struct kvm_s390_extcall_info extcall; | |
0fb97abe JF |
462 | int rc; |
463 | ||
383d0b05 JF |
464 | spin_lock(&li->lock); |
465 | extcall = li->irq.extcall; | |
466 | li->irq.extcall.code = 0; | |
467 | clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
468 | spin_unlock(&li->lock); | |
469 | ||
0fb97abe JF |
470 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call"); |
471 | vcpu->stat.deliver_external_call++; | |
472 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
473 | KVM_S390_INT_EXTERNAL_CALL, | |
383d0b05 | 474 | extcall.code, 0); |
0fb97abe JF |
475 | |
476 | rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, | |
477 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 478 | rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
479 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
480 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
481 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, | |
482 | sizeof(psw_t)); | |
99e20009 | 483 | return rc ? -EFAULT : 0; |
0fb97abe JF |
484 | } |
485 | ||
383d0b05 | 486 | static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) |
8712836b | 487 | { |
383d0b05 JF |
488 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
489 | struct kvm_s390_pgm_info pgm_info; | |
a9a846fd | 490 | int rc = 0, nullifying = false; |
8a2ef71b | 491 | u16 ilc = get_ilc(vcpu); |
8712836b | 492 | |
383d0b05 JF |
493 | spin_lock(&li->lock); |
494 | pgm_info = li->irq.pgm; | |
495 | clear_bit(IRQ_PEND_PROG, &li->pending_irqs); | |
496 | memset(&li->irq.pgm, 0, sizeof(pgm_info)); | |
497 | spin_unlock(&li->lock); | |
498 | ||
0fb97abe | 499 | VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", |
383d0b05 | 500 | pgm_info.code, ilc); |
0fb97abe JF |
501 | vcpu->stat.deliver_program_int++; |
502 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
383d0b05 | 503 | pgm_info.code, 0); |
0fb97abe | 504 | |
383d0b05 | 505 | switch (pgm_info.code & ~PGM_PER) { |
8712836b DH |
506 | case PGM_AFX_TRANSLATION: |
507 | case PGM_ASX_TRANSLATION: | |
508 | case PGM_EX_TRANSLATION: | |
509 | case PGM_LFX_TRANSLATION: | |
510 | case PGM_LSTE_SEQUENCE: | |
511 | case PGM_LSX_TRANSLATION: | |
512 | case PGM_LX_TRANSLATION: | |
513 | case PGM_PRIMARY_AUTHORITY: | |
514 | case PGM_SECONDARY_AUTHORITY: | |
a9a846fd TH |
515 | nullifying = true; |
516 | /* fall through */ | |
8712836b | 517 | case PGM_SPACE_SWITCH: |
383d0b05 | 518 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b DH |
519 | (u64 *)__LC_TRANS_EXC_CODE); |
520 | break; | |
521 | case PGM_ALEN_TRANSLATION: | |
522 | case PGM_ALE_SEQUENCE: | |
523 | case PGM_ASTE_INSTANCE: | |
524 | case PGM_ASTE_SEQUENCE: | |
525 | case PGM_ASTE_VALIDITY: | |
526 | case PGM_EXTENDED_AUTHORITY: | |
383d0b05 | 527 | rc = put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 528 | (u8 *)__LC_EXC_ACCESS_ID); |
a9a846fd | 529 | nullifying = true; |
8712836b DH |
530 | break; |
531 | case PGM_ASCE_TYPE: | |
532 | case PGM_PAGE_TRANSLATION: | |
533 | case PGM_REGION_FIRST_TRANS: | |
534 | case PGM_REGION_SECOND_TRANS: | |
535 | case PGM_REGION_THIRD_TRANS: | |
536 | case PGM_SEGMENT_TRANSLATION: | |
383d0b05 | 537 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 538 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 539 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 540 | (u8 *)__LC_EXC_ACCESS_ID); |
383d0b05 | 541 | rc |= put_guest_lc(vcpu, pgm_info.op_access_id, |
8712836b | 542 | (u8 *)__LC_OP_ACCESS_ID); |
a9a846fd | 543 | nullifying = true; |
8712836b DH |
544 | break; |
545 | case PGM_MONITOR: | |
383d0b05 | 546 | rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, |
a36c5393 | 547 | (u16 *)__LC_MON_CLASS_NR); |
383d0b05 | 548 | rc |= put_guest_lc(vcpu, pgm_info.mon_code, |
8712836b DH |
549 | (u64 *)__LC_MON_CODE); |
550 | break; | |
403c8648 | 551 | case PGM_VECTOR_PROCESSING: |
8712836b | 552 | case PGM_DATA: |
383d0b05 | 553 | rc = put_guest_lc(vcpu, pgm_info.data_exc_code, |
8712836b DH |
554 | (u32 *)__LC_DATA_EXC_CODE); |
555 | break; | |
556 | case PGM_PROTECTION: | |
383d0b05 | 557 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 558 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 559 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b DH |
560 | (u8 *)__LC_EXC_ACCESS_ID); |
561 | break; | |
a9a846fd TH |
562 | case PGM_STACK_FULL: |
563 | case PGM_STACK_EMPTY: | |
564 | case PGM_STACK_SPECIFICATION: | |
565 | case PGM_STACK_TYPE: | |
566 | case PGM_STACK_OPERATION: | |
567 | case PGM_TRACE_TABEL: | |
568 | case PGM_CRYPTO_OPERATION: | |
569 | nullifying = true; | |
570 | break; | |
8712836b DH |
571 | } |
572 | ||
383d0b05 JF |
573 | if (pgm_info.code & PGM_PER) { |
574 | rc |= put_guest_lc(vcpu, pgm_info.per_code, | |
8712836b | 575 | (u8 *) __LC_PER_CODE); |
383d0b05 | 576 | rc |= put_guest_lc(vcpu, pgm_info.per_atmid, |
8712836b | 577 | (u8 *)__LC_PER_ATMID); |
383d0b05 | 578 | rc |= put_guest_lc(vcpu, pgm_info.per_address, |
8712836b | 579 | (u64 *) __LC_PER_ADDRESS); |
383d0b05 | 580 | rc |= put_guest_lc(vcpu, pgm_info.per_access_id, |
8712836b DH |
581 | (u8 *) __LC_PER_ACCESS_ID); |
582 | } | |
583 | ||
a9a846fd TH |
584 | if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST) |
585 | kvm_s390_rewind_psw(vcpu, ilc); | |
586 | ||
8a2ef71b | 587 | rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC); |
383d0b05 | 588 | rc |= put_guest_lc(vcpu, pgm_info.code, |
8712836b DH |
589 | (u16 *)__LC_PGM_INT_CODE); |
590 | rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, | |
591 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
592 | rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, | |
593 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 594 | return rc ? -EFAULT : 0; |
0fb97abe JF |
595 | } |
596 | ||
597 | static int __must_check __deliver_service(struct kvm_vcpu *vcpu, | |
598 | struct kvm_s390_interrupt_info *inti) | |
599 | { | |
600 | int rc; | |
601 | ||
602 | VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", | |
603 | inti->ext.ext_params); | |
604 | vcpu->stat.deliver_service_signal++; | |
605 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
606 | inti->ext.ext_params, 0); | |
607 | ||
608 | rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 609 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
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_params, | |
615 | (u32 *)__LC_EXT_PARAMS); | |
99e20009 | 616 | return rc ? -EFAULT : 0; |
0fb97abe JF |
617 | } |
618 | ||
619 | static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu, | |
620 | struct kvm_s390_interrupt_info *inti) | |
621 | { | |
622 | int rc; | |
623 | ||
624 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
625 | KVM_S390_INT_PFAULT_DONE, 0, | |
626 | inti->ext.ext_params2); | |
8712836b | 627 | |
0fb97abe JF |
628 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE); |
629 | rc |= put_guest_lc(vcpu, PFAULT_DONE, (u16 *)__LC_EXT_CPU_ADDR); | |
630 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
631 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
632 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
633 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
634 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
635 | (u64 *)__LC_EXT_PARAMS2); | |
99e20009 | 636 | return rc ? -EFAULT : 0; |
0fb97abe JF |
637 | } |
638 | ||
639 | static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu, | |
640 | struct kvm_s390_interrupt_info *inti) | |
641 | { | |
642 | int rc; | |
643 | ||
644 | VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx", | |
645 | inti->ext.ext_params, inti->ext.ext_params2); | |
646 | vcpu->stat.deliver_virtio_interrupt++; | |
647 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
648 | inti->ext.ext_params, | |
649 | inti->ext.ext_params2); | |
650 | ||
651 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE); | |
652 | rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (u16 *)__LC_EXT_CPU_ADDR); | |
653 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
654 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
655 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
656 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
657 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
658 | (u32 *)__LC_EXT_PARAMS); | |
659 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
660 | (u64 *)__LC_EXT_PARAMS2); | |
99e20009 | 661 | return rc ? -EFAULT : 0; |
0fb97abe JF |
662 | } |
663 | ||
664 | static int __must_check __deliver_io(struct kvm_vcpu *vcpu, | |
665 | struct kvm_s390_interrupt_info *inti) | |
666 | { | |
667 | int rc; | |
668 | ||
669 | VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type); | |
670 | vcpu->stat.deliver_io_int++; | |
671 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, | |
672 | ((__u32)inti->io.subchannel_id << 16) | | |
673 | inti->io.subchannel_nr, | |
674 | ((__u64)inti->io.io_int_parm << 32) | | |
675 | inti->io.io_int_word); | |
676 | ||
677 | rc = put_guest_lc(vcpu, inti->io.subchannel_id, | |
678 | (u16 *)__LC_SUBCHANNEL_ID); | |
679 | rc |= put_guest_lc(vcpu, inti->io.subchannel_nr, | |
680 | (u16 *)__LC_SUBCHANNEL_NR); | |
681 | rc |= put_guest_lc(vcpu, inti->io.io_int_parm, | |
682 | (u32 *)__LC_IO_INT_PARM); | |
683 | rc |= put_guest_lc(vcpu, inti->io.io_int_word, | |
684 | (u32 *)__LC_IO_INT_WORD); | |
685 | rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, | |
686 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
687 | rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, | |
688 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 689 | return rc ? -EFAULT : 0; |
8712836b DH |
690 | } |
691 | ||
383d0b05 JF |
692 | static int __must_check __deliver_mchk_floating(struct kvm_vcpu *vcpu, |
693 | struct kvm_s390_interrupt_info *inti) | |
694 | { | |
695 | struct kvm_s390_mchk_info *mchk = &inti->mchk; | |
696 | int rc; | |
697 | ||
698 | VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx", | |
699 | mchk->mcic); | |
700 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK, | |
701 | mchk->cr14, mchk->mcic); | |
702 | ||
703 | rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED); | |
704 | rc |= put_guest_lc(vcpu, mchk->mcic, | |
705 | (u64 __user *) __LC_MCCK_CODE); | |
706 | rc |= put_guest_lc(vcpu, mchk->failing_storage_address, | |
707 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); | |
708 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, | |
709 | &mchk->fixed_logout, sizeof(mchk->fixed_logout)); | |
710 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, | |
711 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
712 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
713 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 714 | return rc ? -EFAULT : 0; |
383d0b05 JF |
715 | } |
716 | ||
717 | typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu); | |
718 | ||
719 | static const deliver_irq_t deliver_irq_funcs[] = { | |
720 | [IRQ_PEND_MCHK_EX] = __deliver_machine_check, | |
721 | [IRQ_PEND_PROG] = __deliver_prog, | |
722 | [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal, | |
723 | [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call, | |
724 | [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc, | |
725 | [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer, | |
726 | [IRQ_PEND_RESTART] = __deliver_restart, | |
383d0b05 JF |
727 | [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix, |
728 | [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init, | |
729 | }; | |
730 | ||
731 | static int __must_check __deliver_floating_interrupt(struct kvm_vcpu *vcpu, | |
732 | struct kvm_s390_interrupt_info *inti) | |
ba5c1e9b | 733 | { |
0fb97abe | 734 | int rc; |
ba5c1e9b CO |
735 | |
736 | switch (inti->type) { | |
ba5c1e9b | 737 | case KVM_S390_INT_SERVICE: |
0fb97abe | 738 | rc = __deliver_service(vcpu, inti); |
ba5c1e9b | 739 | break; |
3c038e6b | 740 | case KVM_S390_INT_PFAULT_DONE: |
0fb97abe | 741 | rc = __deliver_pfault_done(vcpu, inti); |
3c038e6b | 742 | break; |
ba5c1e9b | 743 | case KVM_S390_INT_VIRTIO: |
0fb97abe | 744 | rc = __deliver_virtio(vcpu, inti); |
ba5c1e9b | 745 | break; |
48a3e950 | 746 | case KVM_S390_MCHK: |
383d0b05 | 747 | rc = __deliver_mchk_floating(vcpu, inti); |
48a3e950 | 748 | break; |
d8346b7d | 749 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
0fb97abe | 750 | rc = __deliver_io(vcpu, inti); |
d8346b7d | 751 | break; |
ba5c1e9b CO |
752 | default: |
753 | BUG(); | |
754 | } | |
79395031 JF |
755 | |
756 | return rc; | |
ba5c1e9b CO |
757 | } |
758 | ||
ea5f4969 DH |
759 | /* Check whether an external call is pending (deliverable or not) */ |
760 | int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) | |
4953919f | 761 | { |
ea5f4969 DH |
762 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
763 | uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
4953919f | 764 | |
ea5f4969 DH |
765 | if (!sclp_has_sigpif()) |
766 | return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
4953919f | 767 | |
ea5f4969 DH |
768 | return (sigp_ctrl & SIGP_CTRL_C) && |
769 | (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND); | |
4953919f DH |
770 | } |
771 | ||
9a022067 | 772 | int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) |
ba5c1e9b | 773 | { |
180c12fb CB |
774 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; |
775 | struct kvm_s390_interrupt_info *inti; | |
383d0b05 | 776 | int rc; |
ba5c1e9b | 777 | |
383d0b05 | 778 | rc = !!deliverable_local_irqs(vcpu); |
ba5c1e9b CO |
779 | |
780 | if ((!rc) && atomic_read(&fi->active)) { | |
b037a4f3 | 781 | spin_lock(&fi->lock); |
ba5c1e9b CO |
782 | list_for_each_entry(inti, &fi->list, list) |
783 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
784 | rc = 1; | |
785 | break; | |
786 | } | |
b037a4f3 | 787 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
788 | } |
789 | ||
bb78c5ec DH |
790 | if (!rc && kvm_cpu_has_pending_timer(vcpu)) |
791 | rc = 1; | |
ba5c1e9b | 792 | |
ea5f4969 DH |
793 | /* external call pending and deliverable */ |
794 | if (!rc && kvm_s390_ext_call_pending(vcpu) && | |
795 | !psw_extint_disabled(vcpu) && | |
796 | (vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
4953919f DH |
797 | rc = 1; |
798 | ||
9a022067 | 799 | if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) |
6cddd432 DH |
800 | rc = 1; |
801 | ||
ba5c1e9b CO |
802 | return rc; |
803 | } | |
804 | ||
3d80840d MT |
805 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
806 | { | |
bb78c5ec DH |
807 | if (!(vcpu->arch.sie_block->ckc < |
808 | get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) | |
809 | return 0; | |
810 | if (!ckc_interrupts_enabled(vcpu)) | |
811 | return 0; | |
812 | return 1; | |
3d80840d MT |
813 | } |
814 | ||
ba5c1e9b CO |
815 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
816 | { | |
817 | u64 now, sltime; | |
ba5c1e9b CO |
818 | |
819 | vcpu->stat.exit_wait_state++; | |
ba5c1e9b | 820 | |
0759d068 DH |
821 | /* fast path */ |
822 | if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu)) | |
823 | return 0; | |
e52b2af5 | 824 | |
ba5c1e9b CO |
825 | if (psw_interrupts_disabled(vcpu)) { |
826 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
b8e660b8 | 827 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
828 | } |
829 | ||
bb78c5ec | 830 | if (!ckc_interrupts_enabled(vcpu)) { |
ba5c1e9b | 831 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
bda343ef | 832 | __set_cpu_idle(vcpu); |
ba5c1e9b CO |
833 | goto no_timer; |
834 | } | |
835 | ||
8c071b0f | 836 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
ed4f2094 | 837 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); |
bda343ef DH |
838 | |
839 | /* underflow */ | |
840 | if (vcpu->arch.sie_block->ckc < now) | |
841 | return 0; | |
842 | ||
843 | __set_cpu_idle(vcpu); | |
ca872302 CB |
844 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
845 | VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime); | |
ba5c1e9b | 846 | no_timer: |
800c1065 | 847 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
0759d068 | 848 | kvm_vcpu_block(vcpu); |
ba5c1e9b | 849 | __unset_cpu_idle(vcpu); |
800c1065 TH |
850 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
851 | ||
2d00f759 | 852 | hrtimer_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
853 | return 0; |
854 | } | |
855 | ||
0e9c85a5 DH |
856 | void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
857 | { | |
858 | if (waitqueue_active(&vcpu->wq)) { | |
859 | /* | |
860 | * The vcpu gave up the cpu voluntarily, mark it as a good | |
861 | * yield-candidate. | |
862 | */ | |
863 | vcpu->preempted = true; | |
864 | wake_up_interruptible(&vcpu->wq); | |
ce2e4f0b | 865 | vcpu->stat.halt_wakeup++; |
0e9c85a5 DH |
866 | } |
867 | } | |
868 | ||
ca872302 CB |
869 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
870 | { | |
871 | struct kvm_vcpu *vcpu; | |
2d00f759 | 872 | u64 now, sltime; |
ca872302 CB |
873 | |
874 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
2d00f759 DH |
875 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
876 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); | |
ca872302 | 877 | |
2d00f759 DH |
878 | /* |
879 | * If the monotonic clock runs faster than the tod clock we might be | |
880 | * woken up too early and have to go back to sleep to avoid deadlocks. | |
881 | */ | |
882 | if (vcpu->arch.sie_block->ckc > now && | |
883 | hrtimer_forward_now(timer, ns_to_ktime(sltime))) | |
884 | return HRTIMER_RESTART; | |
885 | kvm_s390_vcpu_wakeup(vcpu); | |
ca872302 CB |
886 | return HRTIMER_NORESTART; |
887 | } | |
ba5c1e9b | 888 | |
2ed10cc1 JF |
889 | void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
890 | { | |
891 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2ed10cc1 | 892 | |
4ae3c081 | 893 | spin_lock(&li->lock); |
383d0b05 JF |
894 | li->pending_irqs = 0; |
895 | bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
896 | memset(&li->irq, 0, sizeof(li->irq)); | |
4ae3c081 | 897 | spin_unlock(&li->lock); |
4953919f DH |
898 | |
899 | /* clear pending external calls set by sigp interpretation facility */ | |
383d0b05 | 900 | atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags); |
ea5f4969 | 901 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0; |
2ed10cc1 JF |
902 | } |
903 | ||
614aeab4 | 904 | int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
ba5c1e9b | 905 | { |
180c12fb CB |
906 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
907 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
908 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
383d0b05 | 909 | deliver_irq_t func; |
ba5c1e9b | 910 | int deliver; |
79395031 | 911 | int rc = 0; |
383d0b05 JF |
912 | unsigned long irq_type; |
913 | unsigned long deliverable_irqs; | |
ba5c1e9b CO |
914 | |
915 | __reset_intercept_indicators(vcpu); | |
ba5c1e9b | 916 | |
383d0b05 JF |
917 | /* pending ckc conditions might have been invalidated */ |
918 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
919 | if (kvm_cpu_has_pending_timer(vcpu)) | |
920 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
921 | ||
922 | do { | |
923 | deliverable_irqs = deliverable_local_irqs(vcpu); | |
924 | /* bits are in the order of interrupt priority */ | |
925 | irq_type = find_first_bit(&deliverable_irqs, IRQ_PEND_COUNT); | |
926 | if (irq_type == IRQ_PEND_COUNT) | |
927 | break; | |
928 | func = deliver_irq_funcs[irq_type]; | |
929 | if (!func) { | |
930 | WARN_ON_ONCE(func == NULL); | |
931 | clear_bit(irq_type, &li->pending_irqs); | |
932 | continue; | |
933 | } | |
934 | rc = func(vcpu); | |
935 | } while (!rc && irq_type != IRQ_PEND_COUNT); | |
936 | ||
937 | set_intercept_indicators_local(vcpu); | |
ba5c1e9b | 938 | |
79395031 | 939 | if (!rc && atomic_read(&fi->active)) { |
ba5c1e9b CO |
940 | do { |
941 | deliver = 0; | |
b037a4f3 | 942 | spin_lock(&fi->lock); |
ba5c1e9b CO |
943 | list_for_each_entry_safe(inti, n, &fi->list, list) { |
944 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
945 | list_del(&inti->list); | |
a91b8ebe | 946 | fi->irq_count--; |
ba5c1e9b CO |
947 | deliver = 1; |
948 | break; | |
949 | } | |
950 | __set_intercept_indicator(vcpu, inti); | |
951 | } | |
952 | if (list_empty(&fi->list)) | |
953 | atomic_set(&fi->active, 0); | |
b037a4f3 | 954 | spin_unlock(&fi->lock); |
ba5c1e9b | 955 | if (deliver) { |
383d0b05 | 956 | rc = __deliver_floating_interrupt(vcpu, inti); |
ba5c1e9b CO |
957 | kfree(inti); |
958 | } | |
79395031 | 959 | } while (!rc && deliver); |
ba5c1e9b | 960 | } |
79395031 JF |
961 | |
962 | return rc; | |
ba5c1e9b CO |
963 | } |
964 | ||
383d0b05 | 965 | static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
966 | { |
967 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
968 | ||
383d0b05 | 969 | li->irq.pgm = irq->u.pgm; |
9185124e | 970 | set_bit(IRQ_PEND_PROG, &li->pending_irqs); |
0146a7b0 JF |
971 | return 0; |
972 | } | |
973 | ||
ba5c1e9b CO |
974 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) |
975 | { | |
180c12fb | 976 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
383d0b05 | 977 | struct kvm_s390_irq irq; |
ba5c1e9b CO |
978 | |
979 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); | |
383d0b05 JF |
980 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, code, |
981 | 0, 1); | |
4ae3c081 | 982 | spin_lock(&li->lock); |
383d0b05 JF |
983 | irq.u.pgm.code = code; |
984 | __inject_prog(vcpu, &irq); | |
d0321a24 | 985 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 986 | spin_unlock(&li->lock); |
bcd84683 JF |
987 | return 0; |
988 | } | |
989 | ||
990 | int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, | |
991 | struct kvm_s390_pgm_info *pgm_info) | |
992 | { | |
993 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 994 | struct kvm_s390_irq irq; |
0146a7b0 | 995 | int rc; |
bcd84683 | 996 | |
bcd84683 JF |
997 | VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)", |
998 | pgm_info->code); | |
999 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
1000 | pgm_info->code, 0, 1); | |
4ae3c081 | 1001 | spin_lock(&li->lock); |
383d0b05 JF |
1002 | irq.u.pgm = *pgm_info; |
1003 | rc = __inject_prog(vcpu, &irq); | |
bcd84683 | 1004 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 1005 | spin_unlock(&li->lock); |
0146a7b0 JF |
1006 | return rc; |
1007 | } | |
1008 | ||
383d0b05 | 1009 | static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1010 | { |
1011 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1012 | ||
383d0b05 JF |
1013 | VCPU_EVENT(vcpu, 3, "inject: external irq params:%x, params2:%llx", |
1014 | irq->u.ext.ext_params, irq->u.ext.ext_params2); | |
1015 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, | |
1016 | irq->u.ext.ext_params, | |
1017 | irq->u.ext.ext_params2, 2); | |
1018 | ||
1019 | li->irq.ext = irq->u.ext; | |
1020 | set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
0146a7b0 JF |
1021 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
1022 | return 0; | |
1023 | } | |
1024 | ||
ea5f4969 DH |
1025 | static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id) |
1026 | { | |
1027 | unsigned char new_val, old_val; | |
1028 | uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
1029 | ||
1030 | new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK); | |
1031 | old_val = *sigp_ctrl & ~SIGP_CTRL_C; | |
1032 | if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) { | |
1033 | /* another external call is pending */ | |
1034 | return -EBUSY; | |
1035 | } | |
1036 | atomic_set_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags); | |
1037 | return 0; | |
1038 | } | |
1039 | ||
0675d92d | 1040 | static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1041 | { |
1042 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1043 | struct kvm_s390_extcall_info *extcall = &li->irq.extcall; |
ea5f4969 | 1044 | uint16_t src_id = irq->u.extcall.code; |
0146a7b0 JF |
1045 | |
1046 | VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u", | |
ea5f4969 | 1047 | src_id); |
383d0b05 | 1048 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, |
ea5f4969 DH |
1049 | src_id, 0, 2); |
1050 | ||
1051 | /* sending vcpu invalid */ | |
1052 | if (src_id >= KVM_MAX_VCPUS || | |
1053 | kvm_get_vcpu(vcpu->kvm, src_id) == NULL) | |
1054 | return -EINVAL; | |
1055 | ||
1056 | if (sclp_has_sigpif()) | |
1057 | return __inject_extcall_sigpif(vcpu, src_id); | |
383d0b05 | 1058 | |
ea5f4969 DH |
1059 | if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) |
1060 | return -EBUSY; | |
383d0b05 | 1061 | *extcall = irq->u.extcall; |
0146a7b0 JF |
1062 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
1063 | return 0; | |
1064 | } | |
1065 | ||
383d0b05 | 1066 | static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1067 | { |
1068 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1069 | struct kvm_s390_prefix_info *prefix = &li->irq.prefix; |
0146a7b0 JF |
1070 | |
1071 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)", | |
556cc0da | 1072 | irq->u.prefix.address); |
383d0b05 | 1073 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, |
556cc0da | 1074 | irq->u.prefix.address, 0, 2); |
383d0b05 | 1075 | |
a3a9c59a DH |
1076 | if (!is_vcpu_stopped(vcpu)) |
1077 | return -EBUSY; | |
1078 | ||
383d0b05 JF |
1079 | *prefix = irq->u.prefix; |
1080 | set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
0146a7b0 JF |
1081 | return 0; |
1082 | } | |
1083 | ||
6cddd432 | 1084 | #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) |
383d0b05 | 1085 | static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1086 | { |
1087 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2822545f | 1088 | struct kvm_s390_stop_info *stop = &li->irq.stop; |
6cddd432 | 1089 | int rc = 0; |
0146a7b0 | 1090 | |
383d0b05 JF |
1091 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0, 2); |
1092 | ||
2822545f DH |
1093 | if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) |
1094 | return -EINVAL; | |
1095 | ||
6cddd432 DH |
1096 | if (is_vcpu_stopped(vcpu)) { |
1097 | if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) | |
1098 | rc = kvm_s390_store_status_unloaded(vcpu, | |
1099 | KVM_S390_STORE_STATUS_NOADDR); | |
1100 | return rc; | |
1101 | } | |
1102 | ||
1103 | if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) | |
1104 | return -EBUSY; | |
2822545f | 1105 | stop->flags = irq->u.stop.flags; |
6cddd432 | 1106 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); |
0146a7b0 JF |
1107 | return 0; |
1108 | } | |
1109 | ||
1110 | static int __inject_sigp_restart(struct kvm_vcpu *vcpu, | |
383d0b05 | 1111 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1112 | { |
1113 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1114 | ||
383d0b05 JF |
1115 | VCPU_EVENT(vcpu, 3, "inject: restart type %llx", irq->type); |
1116 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0, 2); | |
1117 | ||
1118 | set_bit(IRQ_PEND_RESTART, &li->pending_irqs); | |
0146a7b0 JF |
1119 | return 0; |
1120 | } | |
1121 | ||
1122 | static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, | |
383d0b05 | 1123 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1124 | { |
1125 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1126 | ||
383d0b05 JF |
1127 | VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", |
1128 | irq->u.emerg.code); | |
1129 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, | |
49538d12 | 1130 | irq->u.emerg.code, 0, 2); |
383d0b05 | 1131 | |
49538d12 | 1132 | set_bit(irq->u.emerg.code, li->sigp_emerg_pending); |
383d0b05 | 1133 | set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
0146a7b0 JF |
1134 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
1135 | return 0; | |
1136 | } | |
1137 | ||
383d0b05 | 1138 | static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1139 | { |
1140 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1141 | struct kvm_s390_mchk_info *mchk = &li->irq.mchk; |
0146a7b0 JF |
1142 | |
1143 | VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx", | |
556cc0da | 1144 | irq->u.mchk.mcic); |
383d0b05 | 1145 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, |
556cc0da | 1146 | irq->u.mchk.mcic, 2); |
383d0b05 JF |
1147 | |
1148 | /* | |
fc2020cf JF |
1149 | * Because repressible machine checks can be indicated along with |
1150 | * exigent machine checks (PoP, Chapter 11, Interruption action) | |
1151 | * we need to combine cr14, mcic and external damage code. | |
1152 | * Failing storage address and the logout area should not be or'ed | |
1153 | * together, we just indicate the last occurrence of the corresponding | |
1154 | * machine check | |
383d0b05 | 1155 | */ |
fc2020cf | 1156 | mchk->cr14 |= irq->u.mchk.cr14; |
383d0b05 | 1157 | mchk->mcic |= irq->u.mchk.mcic; |
fc2020cf JF |
1158 | mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; |
1159 | mchk->failing_storage_address = irq->u.mchk.failing_storage_address; | |
1160 | memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, | |
1161 | sizeof(mchk->fixed_logout)); | |
383d0b05 JF |
1162 | if (mchk->mcic & MCHK_EX_MASK) |
1163 | set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
1164 | else if (mchk->mcic & MCHK_REP_MASK) | |
1165 | set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
0146a7b0 JF |
1166 | return 0; |
1167 | } | |
1168 | ||
383d0b05 | 1169 | static int __inject_ckc(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1170 | { |
1171 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1172 | ||
383d0b05 JF |
1173 | VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CLOCK_COMP); |
1174 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, | |
1175 | 0, 0, 2); | |
1176 | ||
1177 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
0146a7b0 JF |
1178 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
1179 | return 0; | |
1180 | } | |
1181 | ||
383d0b05 | 1182 | static int __inject_cpu_timer(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1183 | { |
1184 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1185 | ||
383d0b05 JF |
1186 | VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CPU_TIMER); |
1187 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, | |
1188 | 0, 0, 2); | |
1189 | ||
1190 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
0146a7b0 | 1191 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); |
ba5c1e9b CO |
1192 | return 0; |
1193 | } | |
1194 | ||
383d0b05 | 1195 | |
fa6b7fe9 CH |
1196 | struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
1197 | u64 cr6, u64 schid) | |
1198 | { | |
1199 | struct kvm_s390_float_interrupt *fi; | |
1200 | struct kvm_s390_interrupt_info *inti, *iter; | |
1201 | ||
1202 | if ((!schid && !cr6) || (schid && cr6)) | |
1203 | return NULL; | |
fa6b7fe9 CH |
1204 | fi = &kvm->arch.float_int; |
1205 | spin_lock(&fi->lock); | |
1206 | inti = NULL; | |
1207 | list_for_each_entry(iter, &fi->list, list) { | |
1208 | if (!is_ioint(iter->type)) | |
1209 | continue; | |
79fd50c6 CH |
1210 | if (cr6 && |
1211 | ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0)) | |
fa6b7fe9 CH |
1212 | continue; |
1213 | if (schid) { | |
1214 | if (((schid & 0x00000000ffff0000) >> 16) != | |
1215 | iter->io.subchannel_id) | |
1216 | continue; | |
1217 | if ((schid & 0x000000000000ffff) != | |
1218 | iter->io.subchannel_nr) | |
1219 | continue; | |
1220 | } | |
1221 | inti = iter; | |
1222 | break; | |
1223 | } | |
a91b8ebe | 1224 | if (inti) { |
fa6b7fe9 | 1225 | list_del_init(&inti->list); |
a91b8ebe JF |
1226 | fi->irq_count--; |
1227 | } | |
fa6b7fe9 CH |
1228 | if (list_empty(&fi->list)) |
1229 | atomic_set(&fi->active, 0); | |
1230 | spin_unlock(&fi->lock); | |
fa6b7fe9 CH |
1231 | return inti; |
1232 | } | |
ba5c1e9b | 1233 | |
a91b8ebe | 1234 | static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) |
ba5c1e9b | 1235 | { |
180c12fb CB |
1236 | struct kvm_s390_local_interrupt *li; |
1237 | struct kvm_s390_float_interrupt *fi; | |
c05c4186 | 1238 | struct kvm_s390_interrupt_info *iter; |
1ee0bc55 | 1239 | struct kvm_vcpu *dst_vcpu = NULL; |
ba5c1e9b | 1240 | int sigcpu; |
a91b8ebe | 1241 | int rc = 0; |
ba5c1e9b | 1242 | |
c05c4186 JF |
1243 | fi = &kvm->arch.float_int; |
1244 | spin_lock(&fi->lock); | |
a91b8ebe JF |
1245 | if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) { |
1246 | rc = -EINVAL; | |
1247 | goto unlock_fi; | |
1248 | } | |
1249 | fi->irq_count++; | |
c05c4186 JF |
1250 | if (!is_ioint(inti->type)) { |
1251 | list_add_tail(&inti->list, &fi->list); | |
1252 | } else { | |
1253 | u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word); | |
1254 | ||
1255 | /* Keep I/O interrupts sorted in isc order. */ | |
1256 | list_for_each_entry(iter, &fi->list, list) { | |
1257 | if (!is_ioint(iter->type)) | |
1258 | continue; | |
1259 | if (int_word_to_isc_bits(iter->io.io_int_word) | |
1260 | <= isc_bits) | |
1261 | continue; | |
1262 | break; | |
1263 | } | |
1264 | list_add_tail(&inti->list, &iter->list); | |
1265 | } | |
1266 | atomic_set(&fi->active, 1); | |
8e2207cd DH |
1267 | if (atomic_read(&kvm->online_vcpus) == 0) |
1268 | goto unlock_fi; | |
c05c4186 JF |
1269 | sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); |
1270 | if (sigcpu == KVM_MAX_VCPUS) { | |
1271 | do { | |
1272 | sigcpu = fi->next_rr_cpu++; | |
1273 | if (sigcpu == KVM_MAX_VCPUS) | |
1274 | sigcpu = fi->next_rr_cpu = 0; | |
1ee0bc55 | 1275 | } while (kvm_get_vcpu(kvm, sigcpu) == NULL); |
c05c4186 | 1276 | } |
1ee0bc55 JF |
1277 | dst_vcpu = kvm_get_vcpu(kvm, sigcpu); |
1278 | li = &dst_vcpu->arch.local_int; | |
4ae3c081 | 1279 | spin_lock(&li->lock); |
da00fcbd CB |
1280 | switch (inti->type) { |
1281 | case KVM_S390_MCHK: | |
1282 | atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags); | |
1283 | break; | |
1284 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1285 | atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags); | |
1286 | break; | |
1287 | default: | |
1288 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
1289 | break; | |
1290 | } | |
4ae3c081 | 1291 | spin_unlock(&li->lock); |
0e9c85a5 | 1292 | kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu)); |
a91b8ebe | 1293 | unlock_fi: |
c05c4186 | 1294 | spin_unlock(&fi->lock); |
a91b8ebe | 1295 | return rc; |
c05c4186 JF |
1296 | } |
1297 | ||
1298 | int kvm_s390_inject_vm(struct kvm *kvm, | |
1299 | struct kvm_s390_interrupt *s390int) | |
1300 | { | |
1301 | struct kvm_s390_interrupt_info *inti; | |
428d53be | 1302 | int rc; |
c05c4186 | 1303 | |
ba5c1e9b CO |
1304 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
1305 | if (!inti) | |
1306 | return -ENOMEM; | |
1307 | ||
c05c4186 JF |
1308 | inti->type = s390int->type; |
1309 | switch (inti->type) { | |
ba5c1e9b | 1310 | case KVM_S390_INT_VIRTIO: |
33e19115 | 1311 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b | 1312 | s390int->parm, s390int->parm64); |
ba5c1e9b CO |
1313 | inti->ext.ext_params = s390int->parm; |
1314 | inti->ext.ext_params2 = s390int->parm64; | |
1315 | break; | |
1316 | case KVM_S390_INT_SERVICE: | |
1317 | VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); | |
ba5c1e9b CO |
1318 | inti->ext.ext_params = s390int->parm; |
1319 | break; | |
3c038e6b | 1320 | case KVM_S390_INT_PFAULT_DONE: |
3c038e6b DD |
1321 | inti->ext.ext_params2 = s390int->parm64; |
1322 | break; | |
48a3e950 CH |
1323 | case KVM_S390_MCHK: |
1324 | VM_EVENT(kvm, 5, "inject: machine check parm64:%llx", | |
1325 | s390int->parm64); | |
48a3e950 CH |
1326 | inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
1327 | inti->mchk.mcic = s390int->parm64; | |
1328 | break; | |
d8346b7d | 1329 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
c05c4186 | 1330 | if (inti->type & IOINT_AI_MASK) |
d8346b7d CH |
1331 | VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)"); |
1332 | else | |
1333 | VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x", | |
1334 | s390int->type & IOINT_CSSID_MASK, | |
1335 | s390int->type & IOINT_SSID_MASK, | |
1336 | s390int->type & IOINT_SCHID_MASK); | |
d8346b7d CH |
1337 | inti->io.subchannel_id = s390int->parm >> 16; |
1338 | inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; | |
1339 | inti->io.io_int_parm = s390int->parm64 >> 32; | |
1340 | inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; | |
1341 | break; | |
ba5c1e9b CO |
1342 | default: |
1343 | kfree(inti); | |
1344 | return -EINVAL; | |
1345 | } | |
ade38c31 CH |
1346 | trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
1347 | 2); | |
ba5c1e9b | 1348 | |
428d53be DH |
1349 | rc = __inject_vm(kvm, inti); |
1350 | if (rc) | |
1351 | kfree(inti); | |
1352 | return rc; | |
ba5c1e9b CO |
1353 | } |
1354 | ||
15462e37 | 1355 | int kvm_s390_reinject_io_int(struct kvm *kvm, |
2f32d4ea CH |
1356 | struct kvm_s390_interrupt_info *inti) |
1357 | { | |
15462e37 | 1358 | return __inject_vm(kvm, inti); |
2f32d4ea CH |
1359 | } |
1360 | ||
383d0b05 JF |
1361 | int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
1362 | struct kvm_s390_irq *irq) | |
1363 | { | |
1364 | irq->type = s390int->type; | |
1365 | switch (irq->type) { | |
1366 | case KVM_S390_PROGRAM_INT: | |
1367 | if (s390int->parm & 0xffff0000) | |
1368 | return -EINVAL; | |
1369 | irq->u.pgm.code = s390int->parm; | |
1370 | break; | |
1371 | case KVM_S390_SIGP_SET_PREFIX: | |
1372 | irq->u.prefix.address = s390int->parm; | |
1373 | break; | |
2822545f DH |
1374 | case KVM_S390_SIGP_STOP: |
1375 | irq->u.stop.flags = s390int->parm; | |
1376 | break; | |
383d0b05 | 1377 | case KVM_S390_INT_EXTERNAL_CALL: |
94d1f564 | 1378 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1379 | return -EINVAL; |
1380 | irq->u.extcall.code = s390int->parm; | |
1381 | break; | |
1382 | case KVM_S390_INT_EMERGENCY: | |
94d1f564 | 1383 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1384 | return -EINVAL; |
1385 | irq->u.emerg.code = s390int->parm; | |
1386 | break; | |
1387 | case KVM_S390_MCHK: | |
1388 | irq->u.mchk.mcic = s390int->parm64; | |
1389 | break; | |
1390 | } | |
1391 | return 0; | |
1392 | } | |
1393 | ||
6cddd432 DH |
1394 | int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) |
1395 | { | |
1396 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1397 | ||
1398 | return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1399 | } | |
1400 | ||
1401 | void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) | |
1402 | { | |
1403 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1404 | ||
1405 | spin_lock(&li->lock); | |
1406 | li->irq.stop.flags = 0; | |
1407 | clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1408 | spin_unlock(&li->lock); | |
1409 | } | |
1410 | ||
383d0b05 | 1411 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
ba5c1e9b | 1412 | { |
0146a7b0 | 1413 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0146a7b0 | 1414 | int rc; |
ba5c1e9b | 1415 | |
0146a7b0 | 1416 | spin_lock(&li->lock); |
383d0b05 | 1417 | switch (irq->type) { |
ba5c1e9b | 1418 | case KVM_S390_PROGRAM_INT: |
ba5c1e9b | 1419 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", |
383d0b05 JF |
1420 | irq->u.pgm.code); |
1421 | rc = __inject_prog(vcpu, irq); | |
ba5c1e9b | 1422 | break; |
b7e6e4d3 | 1423 | case KVM_S390_SIGP_SET_PREFIX: |
383d0b05 | 1424 | rc = __inject_set_prefix(vcpu, irq); |
b7e6e4d3 | 1425 | break; |
ba5c1e9b | 1426 | case KVM_S390_SIGP_STOP: |
383d0b05 | 1427 | rc = __inject_sigp_stop(vcpu, irq); |
0146a7b0 | 1428 | break; |
ba5c1e9b | 1429 | case KVM_S390_RESTART: |
383d0b05 | 1430 | rc = __inject_sigp_restart(vcpu, irq); |
0146a7b0 | 1431 | break; |
e029ae5b | 1432 | case KVM_S390_INT_CLOCK_COMP: |
383d0b05 | 1433 | rc = __inject_ckc(vcpu); |
0146a7b0 | 1434 | break; |
e029ae5b | 1435 | case KVM_S390_INT_CPU_TIMER: |
383d0b05 | 1436 | rc = __inject_cpu_timer(vcpu); |
82a12737 | 1437 | break; |
7697e71f | 1438 | case KVM_S390_INT_EXTERNAL_CALL: |
383d0b05 | 1439 | rc = __inject_extcall(vcpu, irq); |
82a12737 | 1440 | break; |
ba5c1e9b | 1441 | case KVM_S390_INT_EMERGENCY: |
383d0b05 | 1442 | rc = __inject_sigp_emergency(vcpu, irq); |
ba5c1e9b | 1443 | break; |
48a3e950 | 1444 | case KVM_S390_MCHK: |
383d0b05 | 1445 | rc = __inject_mchk(vcpu, irq); |
48a3e950 | 1446 | break; |
3c038e6b | 1447 | case KVM_S390_INT_PFAULT_INIT: |
383d0b05 | 1448 | rc = __inject_pfault_init(vcpu, irq); |
3c038e6b | 1449 | break; |
ba5c1e9b CO |
1450 | case KVM_S390_INT_VIRTIO: |
1451 | case KVM_S390_INT_SERVICE: | |
d8346b7d | 1452 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
ba5c1e9b | 1453 | default: |
0146a7b0 | 1454 | rc = -EINVAL; |
ba5c1e9b | 1455 | } |
4ae3c081 | 1456 | spin_unlock(&li->lock); |
0146a7b0 JF |
1457 | if (!rc) |
1458 | kvm_s390_vcpu_wakeup(vcpu); | |
0146a7b0 | 1459 | return rc; |
ba5c1e9b | 1460 | } |
c05c4186 | 1461 | |
67335e63 | 1462 | void kvm_s390_clear_float_irqs(struct kvm *kvm) |
c05c4186 JF |
1463 | { |
1464 | struct kvm_s390_float_interrupt *fi; | |
1465 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
1466 | ||
c05c4186 JF |
1467 | fi = &kvm->arch.float_int; |
1468 | spin_lock(&fi->lock); | |
1469 | list_for_each_entry_safe(inti, n, &fi->list, list) { | |
1470 | list_del(&inti->list); | |
1471 | kfree(inti); | |
1472 | } | |
a91b8ebe | 1473 | fi->irq_count = 0; |
c05c4186 JF |
1474 | atomic_set(&fi->active, 0); |
1475 | spin_unlock(&fi->lock); | |
c05c4186 JF |
1476 | } |
1477 | ||
1478 | static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti, | |
1479 | u8 *addr) | |
1480 | { | |
1481 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1482 | struct kvm_s390_irq irq = {0}; | |
1483 | ||
1484 | irq.type = inti->type; | |
1485 | switch (inti->type) { | |
3c038e6b DD |
1486 | case KVM_S390_INT_PFAULT_INIT: |
1487 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1488 | case KVM_S390_INT_VIRTIO: |
1489 | case KVM_S390_INT_SERVICE: | |
1490 | irq.u.ext = inti->ext; | |
1491 | break; | |
1492 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1493 | irq.u.io = inti->io; | |
1494 | break; | |
1495 | case KVM_S390_MCHK: | |
1496 | irq.u.mchk = inti->mchk; | |
1497 | break; | |
1498 | default: | |
1499 | return -EINVAL; | |
1500 | } | |
1501 | ||
1502 | if (copy_to_user(uptr, &irq, sizeof(irq))) | |
1503 | return -EFAULT; | |
1504 | ||
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len) | |
1509 | { | |
1510 | struct kvm_s390_interrupt_info *inti; | |
1511 | struct kvm_s390_float_interrupt *fi; | |
1512 | int ret = 0; | |
1513 | int n = 0; | |
1514 | ||
c05c4186 JF |
1515 | fi = &kvm->arch.float_int; |
1516 | spin_lock(&fi->lock); | |
1517 | ||
1518 | list_for_each_entry(inti, &fi->list, list) { | |
1519 | if (len < sizeof(struct kvm_s390_irq)) { | |
1520 | /* signal userspace to try again */ | |
1521 | ret = -ENOMEM; | |
1522 | break; | |
1523 | } | |
1524 | ret = copy_irq_to_user(inti, buf); | |
1525 | if (ret) | |
1526 | break; | |
1527 | buf += sizeof(struct kvm_s390_irq); | |
1528 | len -= sizeof(struct kvm_s390_irq); | |
1529 | n++; | |
1530 | } | |
1531 | ||
1532 | spin_unlock(&fi->lock); | |
c05c4186 JF |
1533 | |
1534 | return ret < 0 ? ret : n; | |
1535 | } | |
1536 | ||
1537 | static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) | |
1538 | { | |
1539 | int r; | |
1540 | ||
1541 | switch (attr->group) { | |
1542 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
1543 | r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr, | |
1544 | attr->attr); | |
1545 | break; | |
1546 | default: | |
1547 | r = -EINVAL; | |
1548 | } | |
1549 | ||
1550 | return r; | |
1551 | } | |
1552 | ||
1553 | static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, | |
1554 | u64 addr) | |
1555 | { | |
1556 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1557 | void *target = NULL; | |
1558 | void __user *source; | |
1559 | u64 size; | |
1560 | ||
1561 | if (get_user(inti->type, (u64 __user *)addr)) | |
1562 | return -EFAULT; | |
1563 | ||
1564 | switch (inti->type) { | |
3c038e6b DD |
1565 | case KVM_S390_INT_PFAULT_INIT: |
1566 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1567 | case KVM_S390_INT_VIRTIO: |
1568 | case KVM_S390_INT_SERVICE: | |
1569 | target = (void *) &inti->ext; | |
1570 | source = &uptr->u.ext; | |
1571 | size = sizeof(inti->ext); | |
1572 | break; | |
1573 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1574 | target = (void *) &inti->io; | |
1575 | source = &uptr->u.io; | |
1576 | size = sizeof(inti->io); | |
1577 | break; | |
1578 | case KVM_S390_MCHK: | |
1579 | target = (void *) &inti->mchk; | |
1580 | source = &uptr->u.mchk; | |
1581 | size = sizeof(inti->mchk); | |
1582 | break; | |
1583 | default: | |
1584 | return -EINVAL; | |
1585 | } | |
1586 | ||
1587 | if (copy_from_user(target, source, size)) | |
1588 | return -EFAULT; | |
1589 | ||
1590 | return 0; | |
1591 | } | |
1592 | ||
1593 | static int enqueue_floating_irq(struct kvm_device *dev, | |
1594 | struct kvm_device_attr *attr) | |
1595 | { | |
1596 | struct kvm_s390_interrupt_info *inti = NULL; | |
1597 | int r = 0; | |
1598 | int len = attr->attr; | |
1599 | ||
1600 | if (len % sizeof(struct kvm_s390_irq) != 0) | |
1601 | return -EINVAL; | |
1602 | else if (len > KVM_S390_FLIC_MAX_BUFFER) | |
1603 | return -EINVAL; | |
1604 | ||
1605 | while (len >= sizeof(struct kvm_s390_irq)) { | |
1606 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
1607 | if (!inti) | |
1608 | return -ENOMEM; | |
1609 | ||
1610 | r = copy_irq_from_user(inti, attr->addr); | |
1611 | if (r) { | |
1612 | kfree(inti); | |
1613 | return r; | |
1614 | } | |
a91b8ebe JF |
1615 | r = __inject_vm(dev->kvm, inti); |
1616 | if (r) { | |
1617 | kfree(inti); | |
1618 | return r; | |
1619 | } | |
c05c4186 JF |
1620 | len -= sizeof(struct kvm_s390_irq); |
1621 | attr->addr += sizeof(struct kvm_s390_irq); | |
1622 | } | |
1623 | ||
1624 | return r; | |
1625 | } | |
1626 | ||
841b91c5 CH |
1627 | static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
1628 | { | |
1629 | if (id >= MAX_S390_IO_ADAPTERS) | |
1630 | return NULL; | |
1631 | return kvm->arch.adapters[id]; | |
1632 | } | |
1633 | ||
1634 | static int register_io_adapter(struct kvm_device *dev, | |
1635 | struct kvm_device_attr *attr) | |
1636 | { | |
1637 | struct s390_io_adapter *adapter; | |
1638 | struct kvm_s390_io_adapter adapter_info; | |
1639 | ||
1640 | if (copy_from_user(&adapter_info, | |
1641 | (void __user *)attr->addr, sizeof(adapter_info))) | |
1642 | return -EFAULT; | |
1643 | ||
1644 | if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || | |
1645 | (dev->kvm->arch.adapters[adapter_info.id] != NULL)) | |
1646 | return -EINVAL; | |
1647 | ||
1648 | adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); | |
1649 | if (!adapter) | |
1650 | return -ENOMEM; | |
1651 | ||
1652 | INIT_LIST_HEAD(&adapter->maps); | |
1653 | init_rwsem(&adapter->maps_lock); | |
1654 | atomic_set(&adapter->nr_maps, 0); | |
1655 | adapter->id = adapter_info.id; | |
1656 | adapter->isc = adapter_info.isc; | |
1657 | adapter->maskable = adapter_info.maskable; | |
1658 | adapter->masked = false; | |
1659 | adapter->swap = adapter_info.swap; | |
1660 | dev->kvm->arch.adapters[adapter->id] = adapter; | |
1661 | ||
1662 | return 0; | |
1663 | } | |
1664 | ||
1665 | int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) | |
1666 | { | |
1667 | int ret; | |
1668 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1669 | ||
1670 | if (!adapter || !adapter->maskable) | |
1671 | return -EINVAL; | |
1672 | ret = adapter->masked; | |
1673 | adapter->masked = masked; | |
1674 | return ret; | |
1675 | } | |
1676 | ||
1677 | static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) | |
1678 | { | |
1679 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1680 | struct s390_map_info *map; | |
1681 | int ret; | |
1682 | ||
1683 | if (!adapter || !addr) | |
1684 | return -EINVAL; | |
1685 | ||
1686 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
1687 | if (!map) { | |
1688 | ret = -ENOMEM; | |
1689 | goto out; | |
1690 | } | |
1691 | INIT_LIST_HEAD(&map->list); | |
1692 | map->guest_addr = addr; | |
6e0a0431 | 1693 | map->addr = gmap_translate(kvm->arch.gmap, addr); |
841b91c5 CH |
1694 | if (map->addr == -EFAULT) { |
1695 | ret = -EFAULT; | |
1696 | goto out; | |
1697 | } | |
1698 | ret = get_user_pages_fast(map->addr, 1, 1, &map->page); | |
1699 | if (ret < 0) | |
1700 | goto out; | |
1701 | BUG_ON(ret != 1); | |
1702 | down_write(&adapter->maps_lock); | |
1703 | if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { | |
1704 | list_add_tail(&map->list, &adapter->maps); | |
1705 | ret = 0; | |
1706 | } else { | |
1707 | put_page(map->page); | |
1708 | ret = -EINVAL; | |
1709 | } | |
1710 | up_write(&adapter->maps_lock); | |
1711 | out: | |
1712 | if (ret) | |
1713 | kfree(map); | |
1714 | return ret; | |
1715 | } | |
1716 | ||
1717 | static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) | |
1718 | { | |
1719 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1720 | struct s390_map_info *map, *tmp; | |
1721 | int found = 0; | |
1722 | ||
1723 | if (!adapter || !addr) | |
1724 | return -EINVAL; | |
1725 | ||
1726 | down_write(&adapter->maps_lock); | |
1727 | list_for_each_entry_safe(map, tmp, &adapter->maps, list) { | |
1728 | if (map->guest_addr == addr) { | |
1729 | found = 1; | |
1730 | atomic_dec(&adapter->nr_maps); | |
1731 | list_del(&map->list); | |
1732 | put_page(map->page); | |
1733 | kfree(map); | |
1734 | break; | |
1735 | } | |
1736 | } | |
1737 | up_write(&adapter->maps_lock); | |
1738 | ||
1739 | return found ? 0 : -EINVAL; | |
1740 | } | |
1741 | ||
1742 | void kvm_s390_destroy_adapters(struct kvm *kvm) | |
1743 | { | |
1744 | int i; | |
1745 | struct s390_map_info *map, *tmp; | |
1746 | ||
1747 | for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { | |
1748 | if (!kvm->arch.adapters[i]) | |
1749 | continue; | |
1750 | list_for_each_entry_safe(map, tmp, | |
1751 | &kvm->arch.adapters[i]->maps, list) { | |
1752 | list_del(&map->list); | |
1753 | put_page(map->page); | |
1754 | kfree(map); | |
1755 | } | |
1756 | kfree(kvm->arch.adapters[i]); | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | static int modify_io_adapter(struct kvm_device *dev, | |
1761 | struct kvm_device_attr *attr) | |
1762 | { | |
1763 | struct kvm_s390_io_adapter_req req; | |
1764 | struct s390_io_adapter *adapter; | |
1765 | int ret; | |
1766 | ||
1767 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
1768 | return -EFAULT; | |
1769 | ||
1770 | adapter = get_io_adapter(dev->kvm, req.id); | |
1771 | if (!adapter) | |
1772 | return -EINVAL; | |
1773 | switch (req.type) { | |
1774 | case KVM_S390_IO_ADAPTER_MASK: | |
1775 | ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); | |
1776 | if (ret > 0) | |
1777 | ret = 0; | |
1778 | break; | |
1779 | case KVM_S390_IO_ADAPTER_MAP: | |
1780 | ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); | |
1781 | break; | |
1782 | case KVM_S390_IO_ADAPTER_UNMAP: | |
1783 | ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); | |
1784 | break; | |
1785 | default: | |
1786 | ret = -EINVAL; | |
1787 | } | |
1788 | ||
1789 | return ret; | |
1790 | } | |
1791 | ||
c05c4186 JF |
1792 | static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
1793 | { | |
1794 | int r = 0; | |
3c038e6b DD |
1795 | unsigned int i; |
1796 | struct kvm_vcpu *vcpu; | |
c05c4186 JF |
1797 | |
1798 | switch (attr->group) { | |
1799 | case KVM_DEV_FLIC_ENQUEUE: | |
1800 | r = enqueue_floating_irq(dev, attr); | |
1801 | break; | |
1802 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
67335e63 | 1803 | kvm_s390_clear_float_irqs(dev->kvm); |
c05c4186 | 1804 | break; |
3c038e6b DD |
1805 | case KVM_DEV_FLIC_APF_ENABLE: |
1806 | dev->kvm->arch.gmap->pfault_enabled = 1; | |
1807 | break; | |
1808 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
1809 | dev->kvm->arch.gmap->pfault_enabled = 0; | |
1810 | /* | |
1811 | * Make sure no async faults are in transition when | |
1812 | * clearing the queues. So we don't need to worry | |
1813 | * about late coming workers. | |
1814 | */ | |
1815 | synchronize_srcu(&dev->kvm->srcu); | |
1816 | kvm_for_each_vcpu(i, vcpu, dev->kvm) | |
1817 | kvm_clear_async_pf_completion_queue(vcpu); | |
1818 | break; | |
841b91c5 CH |
1819 | case KVM_DEV_FLIC_ADAPTER_REGISTER: |
1820 | r = register_io_adapter(dev, attr); | |
1821 | break; | |
1822 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
1823 | r = modify_io_adapter(dev, attr); | |
1824 | break; | |
c05c4186 JF |
1825 | default: |
1826 | r = -EINVAL; | |
1827 | } | |
1828 | ||
1829 | return r; | |
1830 | } | |
1831 | ||
1832 | static int flic_create(struct kvm_device *dev, u32 type) | |
1833 | { | |
1834 | if (!dev) | |
1835 | return -EINVAL; | |
1836 | if (dev->kvm->arch.flic) | |
1837 | return -EINVAL; | |
1838 | dev->kvm->arch.flic = dev; | |
1839 | return 0; | |
1840 | } | |
1841 | ||
1842 | static void flic_destroy(struct kvm_device *dev) | |
1843 | { | |
1844 | dev->kvm->arch.flic = NULL; | |
1845 | kfree(dev); | |
1846 | } | |
1847 | ||
1848 | /* s390 floating irq controller (flic) */ | |
1849 | struct kvm_device_ops kvm_flic_ops = { | |
1850 | .name = "kvm-flic", | |
1851 | .get_attr = flic_get_attr, | |
1852 | .set_attr = flic_set_attr, | |
1853 | .create = flic_create, | |
1854 | .destroy = flic_destroy, | |
1855 | }; | |
84223598 CH |
1856 | |
1857 | static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) | |
1858 | { | |
1859 | unsigned long bit; | |
1860 | ||
1861 | bit = bit_nr + (addr % PAGE_SIZE) * 8; | |
1862 | ||
1863 | return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; | |
1864 | } | |
1865 | ||
1866 | static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, | |
1867 | u64 addr) | |
1868 | { | |
1869 | struct s390_map_info *map; | |
1870 | ||
1871 | if (!adapter) | |
1872 | return NULL; | |
1873 | ||
1874 | list_for_each_entry(map, &adapter->maps, list) { | |
1875 | if (map->guest_addr == addr) | |
1876 | return map; | |
1877 | } | |
1878 | return NULL; | |
1879 | } | |
1880 | ||
1881 | static int adapter_indicators_set(struct kvm *kvm, | |
1882 | struct s390_io_adapter *adapter, | |
1883 | struct kvm_s390_adapter_int *adapter_int) | |
1884 | { | |
1885 | unsigned long bit; | |
1886 | int summary_set, idx; | |
1887 | struct s390_map_info *info; | |
1888 | void *map; | |
1889 | ||
1890 | info = get_map_info(adapter, adapter_int->ind_addr); | |
1891 | if (!info) | |
1892 | return -1; | |
1893 | map = page_address(info->page); | |
1894 | bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); | |
1895 | set_bit(bit, map); | |
1896 | idx = srcu_read_lock(&kvm->srcu); | |
1897 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
1898 | set_page_dirty_lock(info->page); | |
1899 | info = get_map_info(adapter, adapter_int->summary_addr); | |
1900 | if (!info) { | |
1901 | srcu_read_unlock(&kvm->srcu, idx); | |
1902 | return -1; | |
1903 | } | |
1904 | map = page_address(info->page); | |
1905 | bit = get_ind_bit(info->addr, adapter_int->summary_offset, | |
1906 | adapter->swap); | |
1907 | summary_set = test_and_set_bit(bit, map); | |
1908 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
1909 | set_page_dirty_lock(info->page); | |
1910 | srcu_read_unlock(&kvm->srcu, idx); | |
1911 | return summary_set ? 0 : 1; | |
1912 | } | |
1913 | ||
1914 | /* | |
1915 | * < 0 - not injected due to error | |
1916 | * = 0 - coalesced, summary indicator already active | |
1917 | * > 0 - injected interrupt | |
1918 | */ | |
1919 | static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, | |
1920 | struct kvm *kvm, int irq_source_id, int level, | |
1921 | bool line_status) | |
1922 | { | |
1923 | int ret; | |
1924 | struct s390_io_adapter *adapter; | |
1925 | ||
1926 | /* We're only interested in the 0->1 transition. */ | |
1927 | if (!level) | |
1928 | return 0; | |
1929 | adapter = get_io_adapter(kvm, e->adapter.adapter_id); | |
1930 | if (!adapter) | |
1931 | return -1; | |
1932 | down_read(&adapter->maps_lock); | |
1933 | ret = adapter_indicators_set(kvm, adapter, &e->adapter); | |
1934 | up_read(&adapter->maps_lock); | |
1935 | if ((ret > 0) && !adapter->masked) { | |
1936 | struct kvm_s390_interrupt s390int = { | |
1937 | .type = KVM_S390_INT_IO(1, 0, 0, 0), | |
1938 | .parm = 0, | |
1939 | .parm64 = (adapter->isc << 27) | 0x80000000, | |
1940 | }; | |
1941 | ret = kvm_s390_inject_vm(kvm, &s390int); | |
1942 | if (ret == 0) | |
1943 | ret = 1; | |
1944 | } | |
1945 | return ret; | |
1946 | } | |
1947 | ||
8ba918d4 | 1948 | int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
84223598 CH |
1949 | const struct kvm_irq_routing_entry *ue) |
1950 | { | |
1951 | int ret; | |
1952 | ||
1953 | switch (ue->type) { | |
1954 | case KVM_IRQ_ROUTING_S390_ADAPTER: | |
1955 | e->set = set_adapter_int; | |
1956 | e->adapter.summary_addr = ue->u.adapter.summary_addr; | |
1957 | e->adapter.ind_addr = ue->u.adapter.ind_addr; | |
1958 | e->adapter.summary_offset = ue->u.adapter.summary_offset; | |
1959 | e->adapter.ind_offset = ue->u.adapter.ind_offset; | |
1960 | e->adapter.adapter_id = ue->u.adapter.adapter_id; | |
1961 | ret = 0; | |
1962 | break; | |
1963 | default: | |
1964 | ret = -EINVAL; | |
1965 | } | |
1966 | ||
1967 | return ret; | |
1968 | } | |
1969 | ||
1970 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, | |
1971 | int irq_source_id, int level, bool line_status) | |
1972 | { | |
1973 | return -EINVAL; | |
1974 | } |