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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> |
94aa033e | 20 | #include <linux/vmalloc.h> |
cbb870c8 | 21 | #include <asm/asm-offsets.h> |
33b412ac | 22 | #include <asm/dis.h> |
cbb870c8 | 23 | #include <asm/uaccess.h> |
ea5f4969 | 24 | #include <asm/sclp.h> |
6d3da241 | 25 | #include <asm/isc.h> |
1e133ab2 | 26 | #include <asm/gmap.h> |
ba5c1e9b CO |
27 | #include "kvm-s390.h" |
28 | #include "gaccess.h" | |
ade38c31 | 29 | #include "trace-s390.h" |
ba5c1e9b | 30 | |
d8346b7d CH |
31 | #define IOINT_SCHID_MASK 0x0000ffff |
32 | #define IOINT_SSID_MASK 0x00030000 | |
33 | #define IOINT_CSSID_MASK 0x03fc0000 | |
44c6ca3d | 34 | #define PFAULT_INIT 0x0600 |
60f90a14 JF |
35 | #define PFAULT_DONE 0x0680 |
36 | #define VIRTIO_PARAM 0x0d00 | |
d8346b7d | 37 | |
a5bd7647 ED |
38 | /* handle external calls via sigp interpretation facility */ |
39 | static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id) | |
40 | { | |
7d43bafc ED |
41 | int c, scn; |
42 | ||
2c1bb2be DH |
43 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND)) |
44 | return 0; | |
45 | ||
5e044315 | 46 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
47 | if (vcpu->kvm->arch.use_esca) { |
48 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
49 | union esca_sigp_ctrl sigp_ctrl = | |
50 | sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
51 | ||
52 | c = sigp_ctrl.c; | |
53 | scn = sigp_ctrl.scn; | |
54 | } else { | |
55 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
56 | union bsca_sigp_ctrl sigp_ctrl = | |
57 | sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
58 | ||
59 | c = sigp_ctrl.c; | |
60 | scn = sigp_ctrl.scn; | |
61 | } | |
5e044315 | 62 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a5bd7647 ED |
63 | |
64 | if (src_id) | |
7d43bafc | 65 | *src_id = scn; |
a5bd7647 | 66 | |
2c1bb2be | 67 | return c; |
a5bd7647 ED |
68 | } |
69 | ||
70 | static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id) | |
71 | { | |
bc784cce | 72 | int expect, rc; |
a5bd7647 | 73 | |
5e044315 | 74 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
75 | if (vcpu->kvm->arch.use_esca) { |
76 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
77 | union esca_sigp_ctrl *sigp_ctrl = | |
78 | &(sca->cpu[vcpu->vcpu_id].sigp_ctrl); | |
79 | union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl; | |
80 | ||
81 | new_val.scn = src_id; | |
82 | new_val.c = 1; | |
83 | old_val.c = 0; | |
84 | ||
85 | expect = old_val.value; | |
86 | rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value); | |
87 | } else { | |
88 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
89 | union bsca_sigp_ctrl *sigp_ctrl = | |
90 | &(sca->cpu[vcpu->vcpu_id].sigp_ctrl); | |
91 | union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl; | |
bc784cce | 92 | |
7d43bafc ED |
93 | new_val.scn = src_id; |
94 | new_val.c = 1; | |
95 | old_val.c = 0; | |
96 | ||
97 | expect = old_val.value; | |
98 | rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value); | |
99 | } | |
5e044315 | 100 | read_unlock(&vcpu->kvm->arch.sca_lock); |
bc784cce ED |
101 | |
102 | if (rc != expect) { | |
a5bd7647 ED |
103 | /* another external call is pending */ |
104 | return -EBUSY; | |
105 | } | |
106 | atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static void sca_clear_ext_call(struct kvm_vcpu *vcpu) | |
111 | { | |
a5bd7647 | 112 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
7d43bafc | 113 | int rc, expect; |
a5bd7647 ED |
114 | |
115 | atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags); | |
5e044315 | 116 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
117 | if (vcpu->kvm->arch.use_esca) { |
118 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
119 | union esca_sigp_ctrl *sigp_ctrl = | |
120 | &(sca->cpu[vcpu->vcpu_id].sigp_ctrl); | |
121 | union esca_sigp_ctrl old = *sigp_ctrl; | |
122 | ||
123 | expect = old.value; | |
124 | rc = cmpxchg(&sigp_ctrl->value, old.value, 0); | |
125 | } else { | |
126 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
127 | union bsca_sigp_ctrl *sigp_ctrl = | |
128 | &(sca->cpu[vcpu->vcpu_id].sigp_ctrl); | |
129 | union bsca_sigp_ctrl old = *sigp_ctrl; | |
130 | ||
131 | expect = old.value; | |
132 | rc = cmpxchg(&sigp_ctrl->value, old.value, 0); | |
133 | } | |
5e044315 | 134 | read_unlock(&vcpu->kvm->arch.sca_lock); |
7d43bafc | 135 | WARN_ON(rc != expect); /* cannot clear? */ |
a5bd7647 ED |
136 | } |
137 | ||
3c038e6b | 138 | int psw_extint_disabled(struct kvm_vcpu *vcpu) |
ba5c1e9b CO |
139 | { |
140 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
141 | } | |
142 | ||
d8346b7d CH |
143 | static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
144 | { | |
145 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); | |
146 | } | |
147 | ||
48a3e950 CH |
148 | static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
149 | { | |
150 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); | |
151 | } | |
152 | ||
ba5c1e9b CO |
153 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
154 | { | |
fee0e0fd DH |
155 | return psw_extint_disabled(vcpu) && |
156 | psw_ioint_disabled(vcpu) && | |
157 | psw_mchk_disabled(vcpu); | |
ba5c1e9b CO |
158 | } |
159 | ||
bb78c5ec DH |
160 | static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
161 | { | |
162 | if (psw_extint_disabled(vcpu) || | |
163 | !(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
164 | return 0; | |
f71d0dc5 DH |
165 | if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
166 | /* No timer interrupts when single stepping */ | |
167 | return 0; | |
bb78c5ec DH |
168 | return 1; |
169 | } | |
170 | ||
b4aec925 DH |
171 | static int ckc_irq_pending(struct kvm_vcpu *vcpu) |
172 | { | |
60417fcc | 173 | if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm)) |
b4aec925 DH |
174 | return 0; |
175 | return ckc_interrupts_enabled(vcpu); | |
176 | } | |
177 | ||
178 | static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu) | |
179 | { | |
180 | return !psw_extint_disabled(vcpu) && | |
181 | (vcpu->arch.sie_block->gcr[0] & 0x400ul); | |
182 | } | |
183 | ||
184 | static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu) | |
185 | { | |
4287f247 DH |
186 | if (!cpu_timer_interrupts_enabled(vcpu)) |
187 | return 0; | |
188 | return kvm_s390_get_cpu_timer(vcpu) >> 63; | |
b4aec925 DH |
189 | } |
190 | ||
6d3da241 | 191 | static inline int is_ioirq(unsigned long irq_type) |
79fd50c6 | 192 | { |
6d3da241 JF |
193 | return ((irq_type >= IRQ_PEND_IO_ISC_0) && |
194 | (irq_type <= IRQ_PEND_IO_ISC_7)); | |
195 | } | |
79fd50c6 | 196 | |
6d3da241 JF |
197 | static uint64_t isc_to_isc_bits(int isc) |
198 | { | |
79fd50c6 CH |
199 | return (0x80 >> isc) << 24; |
200 | } | |
201 | ||
6d3da241 | 202 | static inline u8 int_word_to_isc(u32 int_word) |
ba5c1e9b | 203 | { |
6d3da241 JF |
204 | return (int_word & 0x38000000) >> 27; |
205 | } | |
206 | ||
5f94c58e | 207 | static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) |
6d3da241 | 208 | { |
5f94c58e DH |
209 | return vcpu->kvm->arch.float_int.pending_irqs | |
210 | vcpu->arch.local_int.pending_irqs; | |
383d0b05 JF |
211 | } |
212 | ||
6d3da241 JF |
213 | static unsigned long disable_iscs(struct kvm_vcpu *vcpu, |
214 | unsigned long active_mask) | |
215 | { | |
216 | int i; | |
217 | ||
218 | for (i = 0; i <= MAX_ISC; i++) | |
219 | if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i))) | |
220 | active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i)); | |
221 | ||
222 | return active_mask; | |
223 | } | |
224 | ||
225 | static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu) | |
383d0b05 | 226 | { |
6d3da241 JF |
227 | unsigned long active_mask; |
228 | ||
5f94c58e | 229 | active_mask = pending_irqs(vcpu); |
ffeca0ae JF |
230 | if (!active_mask) |
231 | return 0; | |
383d0b05 JF |
232 | |
233 | if (psw_extint_disabled(vcpu)) | |
234 | active_mask &= ~IRQ_PEND_EXT_MASK; | |
6d3da241 JF |
235 | if (psw_ioint_disabled(vcpu)) |
236 | active_mask &= ~IRQ_PEND_IO_MASK; | |
237 | else | |
238 | active_mask = disable_iscs(vcpu, active_mask); | |
383d0b05 JF |
239 | if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul)) |
240 | __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask); | |
241 | if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul)) | |
242 | __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask); | |
243 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
244 | __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask); | |
245 | if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul)) | |
246 | __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask); | |
6d3da241 JF |
247 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) |
248 | __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask); | |
383d0b05 JF |
249 | if (psw_mchk_disabled(vcpu)) |
250 | active_mask &= ~IRQ_PEND_MCHK_MASK; | |
6d3da241 JF |
251 | if (!(vcpu->arch.sie_block->gcr[14] & |
252 | vcpu->kvm->arch.float_int.mchk.cr14)) | |
253 | __clear_bit(IRQ_PEND_MCHK_REP, &active_mask); | |
383d0b05 | 254 | |
6cddd432 DH |
255 | /* |
256 | * STOP irqs will never be actively delivered. They are triggered via | |
257 | * intercept requests and cleared when the stop intercept is performed. | |
258 | */ | |
259 | __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask); | |
260 | ||
383d0b05 JF |
261 | return active_mask; |
262 | } | |
263 | ||
ba5c1e9b CO |
264 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
265 | { | |
805de8f4 | 266 | atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
267 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); |
268 | } | |
269 | ||
270 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
271 | { | |
805de8f4 | 272 | atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
273 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); |
274 | } | |
275 | ||
276 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
277 | { | |
805de8f4 PZ |
278 | atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, |
279 | &vcpu->arch.sie_block->cpuflags); | |
ba5c1e9b | 280 | vcpu->arch.sie_block->lctl = 0x0000; |
27291e21 DH |
281 | vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
282 | ||
283 | if (guestdbg_enabled(vcpu)) { | |
284 | vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | | |
285 | LCTL_CR10 | LCTL_CR11); | |
286 | vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); | |
287 | } | |
ba5c1e9b CO |
288 | } |
289 | ||
290 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
291 | { | |
805de8f4 | 292 | atomic_or(flag, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
293 | } |
294 | ||
6d3da241 JF |
295 | static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) |
296 | { | |
5f94c58e | 297 | if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK)) |
6d3da241 JF |
298 | return; |
299 | else if (psw_ioint_disabled(vcpu)) | |
300 | __set_cpuflag(vcpu, CPUSTAT_IO_INT); | |
301 | else | |
302 | vcpu->arch.sie_block->lctl |= LCTL_CR6; | |
303 | } | |
304 | ||
383d0b05 JF |
305 | static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) |
306 | { | |
5f94c58e | 307 | if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK)) |
383d0b05 JF |
308 | return; |
309 | if (psw_extint_disabled(vcpu)) | |
310 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
311 | else | |
312 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
313 | } | |
314 | ||
315 | static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) | |
316 | { | |
5f94c58e | 317 | if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK)) |
383d0b05 JF |
318 | return; |
319 | if (psw_mchk_disabled(vcpu)) | |
320 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
321 | else | |
322 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
323 | } | |
324 | ||
6cddd432 DH |
325 | static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu) |
326 | { | |
327 | if (kvm_s390_is_stop_irq_pending(vcpu)) | |
328 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
329 | } | |
330 | ||
6d3da241 JF |
331 | /* Set interception request for non-deliverable interrupts */ |
332 | static void set_intercept_indicators(struct kvm_vcpu *vcpu) | |
383d0b05 | 333 | { |
6d3da241 | 334 | set_intercept_indicators_io(vcpu); |
383d0b05 JF |
335 | set_intercept_indicators_ext(vcpu); |
336 | set_intercept_indicators_mchk(vcpu); | |
6cddd432 | 337 | set_intercept_indicators_stop(vcpu); |
383d0b05 JF |
338 | } |
339 | ||
0fb97abe JF |
340 | static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) |
341 | { | |
383d0b05 | 342 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
343 | int rc; |
344 | ||
345 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, | |
346 | 0, 0); | |
347 | ||
348 | rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, | |
349 | (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 350 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
351 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
352 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
353 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
354 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 355 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
99e20009 | 356 | return rc ? -EFAULT : 0; |
0fb97abe JF |
357 | } |
358 | ||
359 | static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) | |
360 | { | |
383d0b05 | 361 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
362 | int rc; |
363 | ||
364 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, | |
365 | 0, 0); | |
366 | ||
367 | rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP, | |
368 | (u16 __user *)__LC_EXT_INT_CODE); | |
467fc298 | 369 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
370 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
371 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
372 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
373 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 374 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
99e20009 | 375 | return rc ? -EFAULT : 0; |
0fb97abe JF |
376 | } |
377 | ||
383d0b05 | 378 | static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) |
0fb97abe | 379 | { |
383d0b05 JF |
380 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
381 | struct kvm_s390_ext_info ext; | |
0fb97abe JF |
382 | int rc; |
383 | ||
383d0b05 JF |
384 | spin_lock(&li->lock); |
385 | ext = li->irq.ext; | |
386 | clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
387 | li->irq.ext.ext_params2 = 0; | |
388 | spin_unlock(&li->lock); | |
389 | ||
3f24ba15 CB |
390 | VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx", |
391 | ext.ext_params2); | |
0fb97abe JF |
392 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
393 | KVM_S390_INT_PFAULT_INIT, | |
383d0b05 | 394 | 0, ext.ext_params2); |
0fb97abe JF |
395 | |
396 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE); | |
397 | rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); | |
398 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
399 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
400 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
401 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 402 | rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); |
99e20009 | 403 | return rc ? -EFAULT : 0; |
0fb97abe JF |
404 | } |
405 | ||
383d0b05 | 406 | static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) |
0fb97abe | 407 | { |
6d3da241 | 408 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
383d0b05 | 409 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
6d3da241 | 410 | struct kvm_s390_mchk_info mchk = {}; |
bc17de7c | 411 | unsigned long adtl_status_addr; |
6d3da241 JF |
412 | int deliver = 0; |
413 | int rc = 0; | |
0fb97abe | 414 | |
6d3da241 | 415 | spin_lock(&fi->lock); |
383d0b05 | 416 | spin_lock(&li->lock); |
6d3da241 JF |
417 | if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) || |
418 | test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) { | |
419 | /* | |
420 | * If there was an exigent machine check pending, then any | |
421 | * repressible machine checks that might have been pending | |
422 | * are indicated along with it, so always clear bits for | |
423 | * repressible and exigent interrupts | |
424 | */ | |
425 | mchk = li->irq.mchk; | |
426 | clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
427 | clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
428 | memset(&li->irq.mchk, 0, sizeof(mchk)); | |
429 | deliver = 1; | |
430 | } | |
383d0b05 | 431 | /* |
6d3da241 JF |
432 | * We indicate floating repressible conditions along with |
433 | * other pending conditions. Channel Report Pending and Channel | |
434 | * Subsystem damage are the only two and and are indicated by | |
435 | * bits in mcic and masked in cr14. | |
383d0b05 | 436 | */ |
6d3da241 JF |
437 | if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
438 | mchk.mcic |= fi->mchk.mcic; | |
439 | mchk.cr14 |= fi->mchk.cr14; | |
440 | memset(&fi->mchk, 0, sizeof(mchk)); | |
441 | deliver = 1; | |
442 | } | |
383d0b05 | 443 | spin_unlock(&li->lock); |
6d3da241 | 444 | spin_unlock(&fi->lock); |
383d0b05 | 445 | |
6d3da241 | 446 | if (deliver) { |
3f24ba15 | 447 | VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx", |
6d3da241 JF |
448 | mchk.mcic); |
449 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
450 | KVM_S390_MCHK, | |
451 | mchk.cr14, mchk.mcic); | |
452 | ||
453 | rc = kvm_s390_vcpu_store_status(vcpu, | |
454 | KVM_S390_STORE_STATUS_PREFIXED); | |
455 | rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR, | |
456 | &adtl_status_addr, | |
457 | sizeof(unsigned long)); | |
458 | rc |= kvm_s390_vcpu_store_adtl_status(vcpu, | |
459 | adtl_status_addr); | |
460 | rc |= put_guest_lc(vcpu, mchk.mcic, | |
461 | (u64 __user *) __LC_MCCK_CODE); | |
462 | rc |= put_guest_lc(vcpu, mchk.failing_storage_address, | |
463 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); | |
464 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, | |
465 | &mchk.fixed_logout, | |
466 | sizeof(mchk.fixed_logout)); | |
467 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, | |
468 | &vcpu->arch.sie_block->gpsw, | |
469 | sizeof(psw_t)); | |
470 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
471 | &vcpu->arch.sie_block->gpsw, | |
472 | sizeof(psw_t)); | |
473 | } | |
99e20009 | 474 | return rc ? -EFAULT : 0; |
0fb97abe JF |
475 | } |
476 | ||
477 | static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) | |
478 | { | |
383d0b05 | 479 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
480 | int rc; |
481 | ||
3f24ba15 | 482 | VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart"); |
0fb97abe JF |
483 | vcpu->stat.deliver_restart_signal++; |
484 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); | |
485 | ||
486 | rc = write_guest_lc(vcpu, | |
c667aeac | 487 | offsetof(struct lowcore, restart_old_psw), |
0fb97abe | 488 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
c667aeac | 489 | rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw), |
0fb97abe | 490 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
383d0b05 | 491 | clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
99e20009 | 492 | return rc ? -EFAULT : 0; |
0fb97abe JF |
493 | } |
494 | ||
383d0b05 | 495 | static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) |
0fb97abe | 496 | { |
383d0b05 JF |
497 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
498 | struct kvm_s390_prefix_info prefix; | |
499 | ||
500 | spin_lock(&li->lock); | |
501 | prefix = li->irq.prefix; | |
502 | li->irq.prefix.address = 0; | |
503 | clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
504 | spin_unlock(&li->lock); | |
0fb97abe | 505 | |
0fb97abe JF |
506 | vcpu->stat.deliver_prefix_signal++; |
507 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
508 | KVM_S390_SIGP_SET_PREFIX, | |
383d0b05 | 509 | prefix.address, 0); |
0fb97abe | 510 | |
383d0b05 | 511 | kvm_s390_set_prefix(vcpu, prefix.address); |
0fb97abe JF |
512 | return 0; |
513 | } | |
514 | ||
383d0b05 | 515 | static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) |
0fb97abe | 516 | { |
383d0b05 | 517 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe | 518 | int rc; |
383d0b05 JF |
519 | int cpu_addr; |
520 | ||
521 | spin_lock(&li->lock); | |
522 | cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
523 | clear_bit(cpu_addr, li->sigp_emerg_pending); | |
524 | if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) | |
525 | clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); | |
526 | spin_unlock(&li->lock); | |
0fb97abe | 527 | |
3f24ba15 | 528 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg"); |
0fb97abe | 529 | vcpu->stat.deliver_emergency_signal++; |
383d0b05 JF |
530 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
531 | cpu_addr, 0); | |
0fb97abe JF |
532 | |
533 | rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, | |
534 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 535 | rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
536 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
537 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
538 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
539 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 540 | return rc ? -EFAULT : 0; |
0fb97abe JF |
541 | } |
542 | ||
383d0b05 | 543 | static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) |
0fb97abe | 544 | { |
383d0b05 JF |
545 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
546 | struct kvm_s390_extcall_info extcall; | |
0fb97abe JF |
547 | int rc; |
548 | ||
383d0b05 JF |
549 | spin_lock(&li->lock); |
550 | extcall = li->irq.extcall; | |
551 | li->irq.extcall.code = 0; | |
552 | clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
553 | spin_unlock(&li->lock); | |
554 | ||
3f24ba15 | 555 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call"); |
0fb97abe JF |
556 | vcpu->stat.deliver_external_call++; |
557 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
558 | KVM_S390_INT_EXTERNAL_CALL, | |
383d0b05 | 559 | extcall.code, 0); |
0fb97abe JF |
560 | |
561 | rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, | |
562 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 563 | rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
564 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
565 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
566 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, | |
567 | sizeof(psw_t)); | |
99e20009 | 568 | return rc ? -EFAULT : 0; |
0fb97abe JF |
569 | } |
570 | ||
383d0b05 | 571 | static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) |
8712836b | 572 | { |
383d0b05 JF |
573 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
574 | struct kvm_s390_pgm_info pgm_info; | |
a9a846fd | 575 | int rc = 0, nullifying = false; |
634790b8 | 576 | u16 ilen; |
8712836b | 577 | |
383d0b05 JF |
578 | spin_lock(&li->lock); |
579 | pgm_info = li->irq.pgm; | |
580 | clear_bit(IRQ_PEND_PROG, &li->pending_irqs); | |
581 | memset(&li->irq.pgm, 0, sizeof(pgm_info)); | |
582 | spin_unlock(&li->lock); | |
583 | ||
634790b8 | 584 | ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK; |
0e8bc06a DH |
585 | VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d", |
586 | pgm_info.code, ilen); | |
0fb97abe JF |
587 | vcpu->stat.deliver_program_int++; |
588 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
383d0b05 | 589 | pgm_info.code, 0); |
0fb97abe | 590 | |
383d0b05 | 591 | switch (pgm_info.code & ~PGM_PER) { |
8712836b DH |
592 | case PGM_AFX_TRANSLATION: |
593 | case PGM_ASX_TRANSLATION: | |
594 | case PGM_EX_TRANSLATION: | |
595 | case PGM_LFX_TRANSLATION: | |
596 | case PGM_LSTE_SEQUENCE: | |
597 | case PGM_LSX_TRANSLATION: | |
598 | case PGM_LX_TRANSLATION: | |
599 | case PGM_PRIMARY_AUTHORITY: | |
600 | case PGM_SECONDARY_AUTHORITY: | |
a9a846fd TH |
601 | nullifying = true; |
602 | /* fall through */ | |
8712836b | 603 | case PGM_SPACE_SWITCH: |
383d0b05 | 604 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b DH |
605 | (u64 *)__LC_TRANS_EXC_CODE); |
606 | break; | |
607 | case PGM_ALEN_TRANSLATION: | |
608 | case PGM_ALE_SEQUENCE: | |
609 | case PGM_ASTE_INSTANCE: | |
610 | case PGM_ASTE_SEQUENCE: | |
611 | case PGM_ASTE_VALIDITY: | |
612 | case PGM_EXTENDED_AUTHORITY: | |
383d0b05 | 613 | rc = put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 614 | (u8 *)__LC_EXC_ACCESS_ID); |
a9a846fd | 615 | nullifying = true; |
8712836b DH |
616 | break; |
617 | case PGM_ASCE_TYPE: | |
618 | case PGM_PAGE_TRANSLATION: | |
619 | case PGM_REGION_FIRST_TRANS: | |
620 | case PGM_REGION_SECOND_TRANS: | |
621 | case PGM_REGION_THIRD_TRANS: | |
622 | case PGM_SEGMENT_TRANSLATION: | |
383d0b05 | 623 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 624 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 625 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 626 | (u8 *)__LC_EXC_ACCESS_ID); |
383d0b05 | 627 | rc |= put_guest_lc(vcpu, pgm_info.op_access_id, |
8712836b | 628 | (u8 *)__LC_OP_ACCESS_ID); |
a9a846fd | 629 | nullifying = true; |
8712836b DH |
630 | break; |
631 | case PGM_MONITOR: | |
383d0b05 | 632 | rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, |
a36c5393 | 633 | (u16 *)__LC_MON_CLASS_NR); |
383d0b05 | 634 | rc |= put_guest_lc(vcpu, pgm_info.mon_code, |
8712836b DH |
635 | (u64 *)__LC_MON_CODE); |
636 | break; | |
403c8648 | 637 | case PGM_VECTOR_PROCESSING: |
8712836b | 638 | case PGM_DATA: |
383d0b05 | 639 | rc = put_guest_lc(vcpu, pgm_info.data_exc_code, |
8712836b DH |
640 | (u32 *)__LC_DATA_EXC_CODE); |
641 | break; | |
642 | case PGM_PROTECTION: | |
383d0b05 | 643 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 644 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 645 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b DH |
646 | (u8 *)__LC_EXC_ACCESS_ID); |
647 | break; | |
a9a846fd TH |
648 | case PGM_STACK_FULL: |
649 | case PGM_STACK_EMPTY: | |
650 | case PGM_STACK_SPECIFICATION: | |
651 | case PGM_STACK_TYPE: | |
652 | case PGM_STACK_OPERATION: | |
653 | case PGM_TRACE_TABEL: | |
654 | case PGM_CRYPTO_OPERATION: | |
655 | nullifying = true; | |
656 | break; | |
8712836b DH |
657 | } |
658 | ||
383d0b05 JF |
659 | if (pgm_info.code & PGM_PER) { |
660 | rc |= put_guest_lc(vcpu, pgm_info.per_code, | |
8712836b | 661 | (u8 *) __LC_PER_CODE); |
383d0b05 | 662 | rc |= put_guest_lc(vcpu, pgm_info.per_atmid, |
8712836b | 663 | (u8 *)__LC_PER_ATMID); |
383d0b05 | 664 | rc |= put_guest_lc(vcpu, pgm_info.per_address, |
8712836b | 665 | (u64 *) __LC_PER_ADDRESS); |
383d0b05 | 666 | rc |= put_guest_lc(vcpu, pgm_info.per_access_id, |
8712836b DH |
667 | (u8 *) __LC_PER_ACCESS_ID); |
668 | } | |
669 | ||
eaa4f416 | 670 | if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND)) |
0e8bc06a | 671 | kvm_s390_rewind_psw(vcpu, ilen); |
a9a846fd | 672 | |
0e8bc06a DH |
673 | /* bit 1+2 of the target are the ilc, so we can directly use ilen */ |
674 | rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC); | |
2ba45968 DH |
675 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea, |
676 | (u64 *) __LC_LAST_BREAK); | |
383d0b05 | 677 | rc |= put_guest_lc(vcpu, pgm_info.code, |
8712836b DH |
678 | (u16 *)__LC_PGM_INT_CODE); |
679 | rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, | |
680 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
681 | rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, | |
682 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 683 | return rc ? -EFAULT : 0; |
0fb97abe JF |
684 | } |
685 | ||
6d3da241 | 686 | static int __must_check __deliver_service(struct kvm_vcpu *vcpu) |
0fb97abe | 687 | { |
6d3da241 JF |
688 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
689 | struct kvm_s390_ext_info ext; | |
690 | int rc = 0; | |
691 | ||
692 | spin_lock(&fi->lock); | |
693 | if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) { | |
694 | spin_unlock(&fi->lock); | |
695 | return 0; | |
696 | } | |
697 | ext = fi->srv_signal; | |
698 | memset(&fi->srv_signal, 0, sizeof(ext)); | |
699 | clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
700 | spin_unlock(&fi->lock); | |
0fb97abe | 701 | |
3f24ba15 | 702 | VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x", |
6d3da241 | 703 | ext.ext_params); |
0fb97abe | 704 | vcpu->stat.deliver_service_signal++; |
6d3da241 JF |
705 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, |
706 | ext.ext_params, 0); | |
0fb97abe JF |
707 | |
708 | rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 709 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
710 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
711 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
712 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
713 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
6d3da241 | 714 | rc |= put_guest_lc(vcpu, ext.ext_params, |
0fb97abe | 715 | (u32 *)__LC_EXT_PARAMS); |
6d3da241 | 716 | |
99e20009 | 717 | return rc ? -EFAULT : 0; |
0fb97abe JF |
718 | } |
719 | ||
6d3da241 | 720 | static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu) |
0fb97abe | 721 | { |
6d3da241 JF |
722 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
723 | struct kvm_s390_interrupt_info *inti; | |
724 | int rc = 0; | |
0fb97abe | 725 | |
6d3da241 JF |
726 | spin_lock(&fi->lock); |
727 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT], | |
728 | struct kvm_s390_interrupt_info, | |
729 | list); | |
730 | if (inti) { | |
6d3da241 JF |
731 | list_del(&inti->list); |
732 | fi->counters[FIRQ_CNTR_PFAULT] -= 1; | |
733 | } | |
734 | if (list_empty(&fi->lists[FIRQ_LIST_PFAULT])) | |
735 | clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
736 | spin_unlock(&fi->lock); | |
8712836b | 737 | |
6d3da241 | 738 | if (inti) { |
3f24ba15 CB |
739 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
740 | KVM_S390_INT_PFAULT_DONE, 0, | |
741 | inti->ext.ext_params2); | |
742 | VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx", | |
743 | inti->ext.ext_params2); | |
744 | ||
6d3da241 JF |
745 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, |
746 | (u16 *)__LC_EXT_INT_CODE); | |
747 | rc |= put_guest_lc(vcpu, PFAULT_DONE, | |
748 | (u16 *)__LC_EXT_CPU_ADDR); | |
749 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
750 | &vcpu->arch.sie_block->gpsw, | |
751 | sizeof(psw_t)); | |
752 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
753 | &vcpu->arch.sie_block->gpsw, | |
754 | sizeof(psw_t)); | |
755 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
756 | (u64 *)__LC_EXT_PARAMS2); | |
757 | kfree(inti); | |
758 | } | |
99e20009 | 759 | return rc ? -EFAULT : 0; |
0fb97abe JF |
760 | } |
761 | ||
6d3da241 | 762 | static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu) |
0fb97abe | 763 | { |
6d3da241 JF |
764 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
765 | struct kvm_s390_interrupt_info *inti; | |
766 | int rc = 0; | |
0fb97abe | 767 | |
6d3da241 JF |
768 | spin_lock(&fi->lock); |
769 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO], | |
770 | struct kvm_s390_interrupt_info, | |
771 | list); | |
772 | if (inti) { | |
773 | VCPU_EVENT(vcpu, 4, | |
3f24ba15 | 774 | "deliver: virtio parm: 0x%x,parm64: 0x%llx", |
6d3da241 JF |
775 | inti->ext.ext_params, inti->ext.ext_params2); |
776 | vcpu->stat.deliver_virtio_interrupt++; | |
777 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
778 | inti->type, | |
779 | inti->ext.ext_params, | |
780 | inti->ext.ext_params2); | |
781 | list_del(&inti->list); | |
782 | fi->counters[FIRQ_CNTR_VIRTIO] -= 1; | |
783 | } | |
784 | if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO])) | |
785 | clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
786 | spin_unlock(&fi->lock); | |
0fb97abe | 787 | |
6d3da241 JF |
788 | if (inti) { |
789 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, | |
790 | (u16 *)__LC_EXT_INT_CODE); | |
791 | rc |= put_guest_lc(vcpu, VIRTIO_PARAM, | |
792 | (u16 *)__LC_EXT_CPU_ADDR); | |
793 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
794 | &vcpu->arch.sie_block->gpsw, | |
795 | sizeof(psw_t)); | |
796 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
797 | &vcpu->arch.sie_block->gpsw, | |
798 | sizeof(psw_t)); | |
799 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
800 | (u32 *)__LC_EXT_PARAMS); | |
801 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
802 | (u64 *)__LC_EXT_PARAMS2); | |
803 | kfree(inti); | |
804 | } | |
99e20009 | 805 | return rc ? -EFAULT : 0; |
0fb97abe JF |
806 | } |
807 | ||
808 | static int __must_check __deliver_io(struct kvm_vcpu *vcpu, | |
6d3da241 | 809 | unsigned long irq_type) |
0fb97abe | 810 | { |
6d3da241 JF |
811 | struct list_head *isc_list; |
812 | struct kvm_s390_float_interrupt *fi; | |
813 | struct kvm_s390_interrupt_info *inti = NULL; | |
814 | int rc = 0; | |
0fb97abe | 815 | |
6d3da241 | 816 | fi = &vcpu->kvm->arch.float_int; |
8712836b | 817 | |
6d3da241 JF |
818 | spin_lock(&fi->lock); |
819 | isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0]; | |
820 | inti = list_first_entry_or_null(isc_list, | |
821 | struct kvm_s390_interrupt_info, | |
822 | list); | |
823 | if (inti) { | |
3f24ba15 | 824 | VCPU_EVENT(vcpu, 4, "deliver: I/O 0x%llx", inti->type); |
6d3da241 JF |
825 | vcpu->stat.deliver_io_int++; |
826 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
827 | inti->type, | |
828 | ((__u32)inti->io.subchannel_id << 16) | | |
829 | inti->io.subchannel_nr, | |
830 | ((__u64)inti->io.io_int_parm << 32) | | |
831 | inti->io.io_int_word); | |
832 | list_del(&inti->list); | |
833 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
834 | } | |
835 | if (list_empty(isc_list)) | |
836 | clear_bit(irq_type, &fi->pending_irqs); | |
837 | spin_unlock(&fi->lock); | |
838 | ||
839 | if (inti) { | |
840 | rc = put_guest_lc(vcpu, inti->io.subchannel_id, | |
841 | (u16 *)__LC_SUBCHANNEL_ID); | |
842 | rc |= put_guest_lc(vcpu, inti->io.subchannel_nr, | |
843 | (u16 *)__LC_SUBCHANNEL_NR); | |
844 | rc |= put_guest_lc(vcpu, inti->io.io_int_parm, | |
845 | (u32 *)__LC_IO_INT_PARM); | |
846 | rc |= put_guest_lc(vcpu, inti->io.io_int_word, | |
847 | (u32 *)__LC_IO_INT_WORD); | |
848 | rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, | |
849 | &vcpu->arch.sie_block->gpsw, | |
850 | sizeof(psw_t)); | |
851 | rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, | |
852 | &vcpu->arch.sie_block->gpsw, | |
853 | sizeof(psw_t)); | |
854 | kfree(inti); | |
855 | } | |
383d0b05 | 856 | |
99e20009 | 857 | return rc ? -EFAULT : 0; |
383d0b05 JF |
858 | } |
859 | ||
860 | typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu); | |
861 | ||
862 | static const deliver_irq_t deliver_irq_funcs[] = { | |
863 | [IRQ_PEND_MCHK_EX] = __deliver_machine_check, | |
6d3da241 | 864 | [IRQ_PEND_MCHK_REP] = __deliver_machine_check, |
383d0b05 JF |
865 | [IRQ_PEND_PROG] = __deliver_prog, |
866 | [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal, | |
867 | [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call, | |
868 | [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc, | |
869 | [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer, | |
870 | [IRQ_PEND_RESTART] = __deliver_restart, | |
383d0b05 JF |
871 | [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix, |
872 | [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init, | |
6d3da241 JF |
873 | [IRQ_PEND_EXT_SERVICE] = __deliver_service, |
874 | [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done, | |
875 | [IRQ_PEND_VIRTIO] = __deliver_virtio, | |
383d0b05 JF |
876 | }; |
877 | ||
ea5f4969 DH |
878 | /* Check whether an external call is pending (deliverable or not) */ |
879 | int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) | |
4953919f | 880 | { |
ea5f4969 | 881 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
4953919f | 882 | |
37c5f6c8 | 883 | if (!sclp.has_sigpif) |
ea5f4969 | 884 | return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); |
4953919f | 885 | |
a5bd7647 | 886 | return sca_ext_call_pending(vcpu, NULL); |
4953919f DH |
887 | } |
888 | ||
9a022067 | 889 | int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) |
ba5c1e9b | 890 | { |
4d32ad6b DH |
891 | if (deliverable_irqs(vcpu)) |
892 | return 1; | |
ba5c1e9b | 893 | |
4d32ad6b DH |
894 | if (kvm_cpu_has_pending_timer(vcpu)) |
895 | return 1; | |
ba5c1e9b | 896 | |
ea5f4969 | 897 | /* external call pending and deliverable */ |
4d32ad6b | 898 | if (kvm_s390_ext_call_pending(vcpu) && |
ea5f4969 DH |
899 | !psw_extint_disabled(vcpu) && |
900 | (vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
4d32ad6b | 901 | return 1; |
4953919f | 902 | |
4d32ad6b DH |
903 | if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) |
904 | return 1; | |
905 | return 0; | |
ba5c1e9b CO |
906 | } |
907 | ||
3d80840d MT |
908 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
909 | { | |
b4aec925 | 910 | return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu); |
3d80840d MT |
911 | } |
912 | ||
b3c17f10 DH |
913 | static u64 __calculate_sltime(struct kvm_vcpu *vcpu) |
914 | { | |
915 | u64 now, cputm, sltime = 0; | |
916 | ||
917 | if (ckc_interrupts_enabled(vcpu)) { | |
918 | now = kvm_s390_get_tod_clock_fast(vcpu->kvm); | |
919 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); | |
920 | /* already expired or overflow? */ | |
921 | if (!sltime || vcpu->arch.sie_block->ckc <= now) | |
922 | return 0; | |
923 | if (cpu_timer_interrupts_enabled(vcpu)) { | |
924 | cputm = kvm_s390_get_cpu_timer(vcpu); | |
925 | /* already expired? */ | |
926 | if (cputm >> 63) | |
927 | return 0; | |
928 | return min(sltime, tod_to_ns(cputm)); | |
929 | } | |
930 | } else if (cpu_timer_interrupts_enabled(vcpu)) { | |
931 | sltime = kvm_s390_get_cpu_timer(vcpu); | |
932 | /* already expired? */ | |
933 | if (sltime >> 63) | |
934 | return 0; | |
935 | } | |
936 | return sltime; | |
937 | } | |
938 | ||
ba5c1e9b CO |
939 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
940 | { | |
b3c17f10 | 941 | u64 sltime; |
ba5c1e9b CO |
942 | |
943 | vcpu->stat.exit_wait_state++; | |
ba5c1e9b | 944 | |
0759d068 | 945 | /* fast path */ |
118b862b | 946 | if (kvm_arch_vcpu_runnable(vcpu)) |
0759d068 | 947 | return 0; |
e52b2af5 | 948 | |
ba5c1e9b CO |
949 | if (psw_interrupts_disabled(vcpu)) { |
950 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
b8e660b8 | 951 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
952 | } |
953 | ||
b3c17f10 DH |
954 | if (!ckc_interrupts_enabled(vcpu) && |
955 | !cpu_timer_interrupts_enabled(vcpu)) { | |
ba5c1e9b | 956 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
bda343ef | 957 | __set_cpu_idle(vcpu); |
ba5c1e9b CO |
958 | goto no_timer; |
959 | } | |
960 | ||
b3c17f10 DH |
961 | sltime = __calculate_sltime(vcpu); |
962 | if (!sltime) | |
bda343ef DH |
963 | return 0; |
964 | ||
965 | __set_cpu_idle(vcpu); | |
ca872302 | 966 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
b3c17f10 | 967 | VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime); |
ba5c1e9b | 968 | no_timer: |
800c1065 | 969 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
0759d068 | 970 | kvm_vcpu_block(vcpu); |
ba5c1e9b | 971 | __unset_cpu_idle(vcpu); |
800c1065 TH |
972 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
973 | ||
2d00f759 | 974 | hrtimer_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
975 | return 0; |
976 | } | |
977 | ||
0e9c85a5 DH |
978 | void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
979 | { | |
8577370f | 980 | if (swait_active(&vcpu->wq)) { |
0e9c85a5 DH |
981 | /* |
982 | * The vcpu gave up the cpu voluntarily, mark it as a good | |
983 | * yield-candidate. | |
984 | */ | |
985 | vcpu->preempted = true; | |
8577370f | 986 | swake_up(&vcpu->wq); |
ce2e4f0b | 987 | vcpu->stat.halt_wakeup++; |
0e9c85a5 DH |
988 | } |
989 | } | |
990 | ||
ca872302 CB |
991 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
992 | { | |
993 | struct kvm_vcpu *vcpu; | |
b3c17f10 | 994 | u64 sltime; |
ca872302 CB |
995 | |
996 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
b3c17f10 | 997 | sltime = __calculate_sltime(vcpu); |
ca872302 | 998 | |
2d00f759 DH |
999 | /* |
1000 | * If the monotonic clock runs faster than the tod clock we might be | |
1001 | * woken up too early and have to go back to sleep to avoid deadlocks. | |
1002 | */ | |
b3c17f10 | 1003 | if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime))) |
2d00f759 DH |
1004 | return HRTIMER_RESTART; |
1005 | kvm_s390_vcpu_wakeup(vcpu); | |
ca872302 CB |
1006 | return HRTIMER_NORESTART; |
1007 | } | |
ba5c1e9b | 1008 | |
2ed10cc1 JF |
1009 | void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
1010 | { | |
1011 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2ed10cc1 | 1012 | |
4ae3c081 | 1013 | spin_lock(&li->lock); |
383d0b05 JF |
1014 | li->pending_irqs = 0; |
1015 | bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
1016 | memset(&li->irq, 0, sizeof(li->irq)); | |
4ae3c081 | 1017 | spin_unlock(&li->lock); |
4953919f | 1018 | |
a5bd7647 | 1019 | sca_clear_ext_call(vcpu); |
2ed10cc1 JF |
1020 | } |
1021 | ||
614aeab4 | 1022 | int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
ba5c1e9b | 1023 | { |
180c12fb | 1024 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
383d0b05 | 1025 | deliver_irq_t func; |
79395031 | 1026 | int rc = 0; |
383d0b05 | 1027 | unsigned long irq_type; |
6d3da241 | 1028 | unsigned long irqs; |
ba5c1e9b CO |
1029 | |
1030 | __reset_intercept_indicators(vcpu); | |
ba5c1e9b | 1031 | |
383d0b05 JF |
1032 | /* pending ckc conditions might have been invalidated */ |
1033 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
b4aec925 | 1034 | if (ckc_irq_pending(vcpu)) |
383d0b05 JF |
1035 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
1036 | ||
b4aec925 DH |
1037 | /* pending cpu timer conditions might have been invalidated */ |
1038 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
1039 | if (cpu_timer_irq_pending(vcpu)) | |
1040 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
1041 | ||
ffeca0ae | 1042 | while ((irqs = deliverable_irqs(vcpu)) && !rc) { |
383d0b05 | 1043 | /* bits are in the order of interrupt priority */ |
6d3da241 | 1044 | irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT); |
6d3da241 JF |
1045 | if (is_ioirq(irq_type)) { |
1046 | rc = __deliver_io(vcpu, irq_type); | |
1047 | } else { | |
1048 | func = deliver_irq_funcs[irq_type]; | |
1049 | if (!func) { | |
1050 | WARN_ON_ONCE(func == NULL); | |
1051 | clear_bit(irq_type, &li->pending_irqs); | |
1052 | continue; | |
1053 | } | |
1054 | rc = func(vcpu); | |
383d0b05 | 1055 | } |
ffeca0ae | 1056 | } |
383d0b05 | 1057 | |
6d3da241 | 1058 | set_intercept_indicators(vcpu); |
79395031 JF |
1059 | |
1060 | return rc; | |
ba5c1e9b CO |
1061 | } |
1062 | ||
383d0b05 | 1063 | static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1064 | { |
1065 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1066 | ||
ed2afcfa DH |
1067 | VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code); |
1068 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
1069 | irq->u.pgm.code, 0); | |
1070 | ||
634790b8 DH |
1071 | if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) { |
1072 | /* auto detection if no valid ILC was given */ | |
1073 | irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK; | |
1074 | irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu); | |
1075 | irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID; | |
1076 | } | |
1077 | ||
238293b1 DH |
1078 | if (irq->u.pgm.code == PGM_PER) { |
1079 | li->irq.pgm.code |= PGM_PER; | |
634790b8 | 1080 | li->irq.pgm.flags = irq->u.pgm.flags; |
238293b1 DH |
1081 | /* only modify PER related information */ |
1082 | li->irq.pgm.per_address = irq->u.pgm.per_address; | |
1083 | li->irq.pgm.per_code = irq->u.pgm.per_code; | |
1084 | li->irq.pgm.per_atmid = irq->u.pgm.per_atmid; | |
1085 | li->irq.pgm.per_access_id = irq->u.pgm.per_access_id; | |
1086 | } else if (!(irq->u.pgm.code & PGM_PER)) { | |
1087 | li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) | | |
1088 | irq->u.pgm.code; | |
634790b8 | 1089 | li->irq.pgm.flags = irq->u.pgm.flags; |
238293b1 DH |
1090 | /* only modify non-PER information */ |
1091 | li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code; | |
1092 | li->irq.pgm.mon_code = irq->u.pgm.mon_code; | |
1093 | li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code; | |
1094 | li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr; | |
1095 | li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id; | |
1096 | li->irq.pgm.op_access_id = irq->u.pgm.op_access_id; | |
1097 | } else { | |
1098 | li->irq.pgm = irq->u.pgm; | |
1099 | } | |
9185124e | 1100 | set_bit(IRQ_PEND_PROG, &li->pending_irqs); |
0146a7b0 JF |
1101 | return 0; |
1102 | } | |
1103 | ||
383d0b05 | 1104 | static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1105 | { |
1106 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1107 | ||
3f24ba15 CB |
1108 | VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx", |
1109 | irq->u.ext.ext_params2); | |
383d0b05 JF |
1110 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, |
1111 | irq->u.ext.ext_params, | |
ed2afcfa | 1112 | irq->u.ext.ext_params2); |
383d0b05 JF |
1113 | |
1114 | li->irq.ext = irq->u.ext; | |
1115 | set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
805de8f4 | 1116 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1117 | return 0; |
1118 | } | |
1119 | ||
0675d92d | 1120 | static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1121 | { |
1122 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1123 | struct kvm_s390_extcall_info *extcall = &li->irq.extcall; |
ea5f4969 | 1124 | uint16_t src_id = irq->u.extcall.code; |
0146a7b0 | 1125 | |
3f24ba15 | 1126 | VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u", |
ea5f4969 | 1127 | src_id); |
383d0b05 | 1128 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, |
ed2afcfa | 1129 | src_id, 0); |
ea5f4969 DH |
1130 | |
1131 | /* sending vcpu invalid */ | |
152e9f65 | 1132 | if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL) |
ea5f4969 DH |
1133 | return -EINVAL; |
1134 | ||
37c5f6c8 | 1135 | if (sclp.has_sigpif) |
a5bd7647 | 1136 | return sca_inject_ext_call(vcpu, src_id); |
383d0b05 | 1137 | |
b938eace | 1138 | if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) |
ea5f4969 | 1139 | return -EBUSY; |
383d0b05 | 1140 | *extcall = irq->u.extcall; |
805de8f4 | 1141 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1142 | return 0; |
1143 | } | |
1144 | ||
383d0b05 | 1145 | static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1146 | { |
1147 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1148 | struct kvm_s390_prefix_info *prefix = &li->irq.prefix; |
0146a7b0 | 1149 | |
ed2afcfa | 1150 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x", |
556cc0da | 1151 | irq->u.prefix.address); |
383d0b05 | 1152 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, |
ed2afcfa | 1153 | irq->u.prefix.address, 0); |
383d0b05 | 1154 | |
a3a9c59a DH |
1155 | if (!is_vcpu_stopped(vcpu)) |
1156 | return -EBUSY; | |
1157 | ||
383d0b05 JF |
1158 | *prefix = irq->u.prefix; |
1159 | set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
0146a7b0 JF |
1160 | return 0; |
1161 | } | |
1162 | ||
6cddd432 | 1163 | #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) |
383d0b05 | 1164 | static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1165 | { |
1166 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2822545f | 1167 | struct kvm_s390_stop_info *stop = &li->irq.stop; |
6cddd432 | 1168 | int rc = 0; |
0146a7b0 | 1169 | |
ed2afcfa | 1170 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0); |
383d0b05 | 1171 | |
2822545f DH |
1172 | if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) |
1173 | return -EINVAL; | |
1174 | ||
6cddd432 DH |
1175 | if (is_vcpu_stopped(vcpu)) { |
1176 | if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) | |
1177 | rc = kvm_s390_store_status_unloaded(vcpu, | |
1178 | KVM_S390_STORE_STATUS_NOADDR); | |
1179 | return rc; | |
1180 | } | |
1181 | ||
1182 | if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) | |
1183 | return -EBUSY; | |
2822545f | 1184 | stop->flags = irq->u.stop.flags; |
6cddd432 | 1185 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); |
0146a7b0 JF |
1186 | return 0; |
1187 | } | |
1188 | ||
1189 | static int __inject_sigp_restart(struct kvm_vcpu *vcpu, | |
383d0b05 | 1190 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1191 | { |
1192 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1193 | ||
3f24ba15 | 1194 | VCPU_EVENT(vcpu, 3, "%s", "inject: restart int"); |
ed2afcfa | 1195 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); |
383d0b05 JF |
1196 | |
1197 | set_bit(IRQ_PEND_RESTART, &li->pending_irqs); | |
0146a7b0 JF |
1198 | return 0; |
1199 | } | |
1200 | ||
1201 | static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, | |
383d0b05 | 1202 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1203 | { |
1204 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1205 | ||
3f24ba15 | 1206 | VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u", |
383d0b05 JF |
1207 | irq->u.emerg.code); |
1208 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, | |
ed2afcfa | 1209 | irq->u.emerg.code, 0); |
383d0b05 | 1210 | |
b85de33a DH |
1211 | /* sending vcpu invalid */ |
1212 | if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL) | |
1213 | return -EINVAL; | |
1214 | ||
49538d12 | 1215 | set_bit(irq->u.emerg.code, li->sigp_emerg_pending); |
383d0b05 | 1216 | set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
805de8f4 | 1217 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1218 | return 0; |
1219 | } | |
1220 | ||
383d0b05 | 1221 | static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1222 | { |
1223 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1224 | struct kvm_s390_mchk_info *mchk = &li->irq.mchk; |
0146a7b0 | 1225 | |
3f24ba15 | 1226 | VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx", |
556cc0da | 1227 | irq->u.mchk.mcic); |
383d0b05 | 1228 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, |
ed2afcfa | 1229 | irq->u.mchk.mcic); |
383d0b05 JF |
1230 | |
1231 | /* | |
fc2020cf JF |
1232 | * Because repressible machine checks can be indicated along with |
1233 | * exigent machine checks (PoP, Chapter 11, Interruption action) | |
1234 | * we need to combine cr14, mcic and external damage code. | |
1235 | * Failing storage address and the logout area should not be or'ed | |
1236 | * together, we just indicate the last occurrence of the corresponding | |
1237 | * machine check | |
383d0b05 | 1238 | */ |
fc2020cf | 1239 | mchk->cr14 |= irq->u.mchk.cr14; |
383d0b05 | 1240 | mchk->mcic |= irq->u.mchk.mcic; |
fc2020cf JF |
1241 | mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; |
1242 | mchk->failing_storage_address = irq->u.mchk.failing_storage_address; | |
1243 | memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, | |
1244 | sizeof(mchk->fixed_logout)); | |
383d0b05 JF |
1245 | if (mchk->mcic & MCHK_EX_MASK) |
1246 | set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
1247 | else if (mchk->mcic & MCHK_REP_MASK) | |
1248 | set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
0146a7b0 JF |
1249 | return 0; |
1250 | } | |
1251 | ||
383d0b05 | 1252 | static int __inject_ckc(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1253 | { |
1254 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1255 | ||
3f24ba15 | 1256 | VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external"); |
383d0b05 | 1257 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, |
ed2afcfa | 1258 | 0, 0); |
383d0b05 JF |
1259 | |
1260 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
805de8f4 | 1261 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1262 | return 0; |
1263 | } | |
1264 | ||
383d0b05 | 1265 | static int __inject_cpu_timer(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1266 | { |
1267 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1268 | ||
3f24ba15 | 1269 | VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external"); |
383d0b05 | 1270 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, |
ed2afcfa | 1271 | 0, 0); |
383d0b05 JF |
1272 | |
1273 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
805de8f4 | 1274 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
ba5c1e9b CO |
1275 | return 0; |
1276 | } | |
1277 | ||
6d3da241 JF |
1278 | static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm, |
1279 | int isc, u32 schid) | |
1280 | { | |
1281 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1282 | struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1283 | struct kvm_s390_interrupt_info *iter; | |
1284 | u16 id = (schid & 0xffff0000U) >> 16; | |
1285 | u16 nr = schid & 0x0000ffffU; | |
1286 | ||
1287 | spin_lock(&fi->lock); | |
1288 | list_for_each_entry(iter, isc_list, list) { | |
1289 | if (schid && (id != iter->io.subchannel_id || | |
1290 | nr != iter->io.subchannel_nr)) | |
1291 | continue; | |
1292 | /* found an appropriate entry */ | |
1293 | list_del_init(&iter->list); | |
1294 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
1295 | if (list_empty(isc_list)) | |
1296 | clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); | |
1297 | spin_unlock(&fi->lock); | |
1298 | return iter; | |
1299 | } | |
1300 | spin_unlock(&fi->lock); | |
1301 | return NULL; | |
1302 | } | |
383d0b05 | 1303 | |
6d3da241 JF |
1304 | /* |
1305 | * Dequeue and return an I/O interrupt matching any of the interruption | |
1306 | * subclasses as designated by the isc mask in cr6 and the schid (if != 0). | |
1307 | */ | |
fa6b7fe9 | 1308 | struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
6d3da241 JF |
1309 | u64 isc_mask, u32 schid) |
1310 | { | |
1311 | struct kvm_s390_interrupt_info *inti = NULL; | |
1312 | int isc; | |
1313 | ||
1314 | for (isc = 0; isc <= MAX_ISC && !inti; isc++) { | |
1315 | if (isc_mask & isc_to_isc_bits(isc)) | |
1316 | inti = get_io_int(kvm, isc, schid); | |
1317 | } | |
1318 | return inti; | |
1319 | } | |
1320 | ||
1321 | #define SCCB_MASK 0xFFFFFFF8 | |
1322 | #define SCCB_EVENT_PENDING 0x3 | |
1323 | ||
1324 | static int __inject_service(struct kvm *kvm, | |
1325 | struct kvm_s390_interrupt_info *inti) | |
1326 | { | |
1327 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1328 | ||
1329 | spin_lock(&fi->lock); | |
1330 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING; | |
1331 | /* | |
1332 | * Early versions of the QEMU s390 bios will inject several | |
1333 | * service interrupts after another without handling a | |
1334 | * condition code indicating busy. | |
1335 | * We will silently ignore those superfluous sccb values. | |
1336 | * A future version of QEMU will take care of serialization | |
1337 | * of servc requests | |
1338 | */ | |
1339 | if (fi->srv_signal.ext_params & SCCB_MASK) | |
1340 | goto out; | |
1341 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK; | |
1342 | set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
1343 | out: | |
1344 | spin_unlock(&fi->lock); | |
1345 | kfree(inti); | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static int __inject_virtio(struct kvm *kvm, | |
1350 | struct kvm_s390_interrupt_info *inti) | |
1351 | { | |
1352 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1353 | ||
1354 | spin_lock(&fi->lock); | |
1355 | if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) { | |
1356 | spin_unlock(&fi->lock); | |
1357 | return -EBUSY; | |
1358 | } | |
1359 | fi->counters[FIRQ_CNTR_VIRTIO] += 1; | |
1360 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]); | |
1361 | set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
1362 | spin_unlock(&fi->lock); | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | static int __inject_pfault_done(struct kvm *kvm, | |
1367 | struct kvm_s390_interrupt_info *inti) | |
1368 | { | |
1369 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1370 | ||
1371 | spin_lock(&fi->lock); | |
1372 | if (fi->counters[FIRQ_CNTR_PFAULT] >= | |
1373 | (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) { | |
1374 | spin_unlock(&fi->lock); | |
1375 | return -EBUSY; | |
1376 | } | |
1377 | fi->counters[FIRQ_CNTR_PFAULT] += 1; | |
1378 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]); | |
1379 | set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
1380 | spin_unlock(&fi->lock); | |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | #define CR_PENDING_SUBCLASS 28 | |
1385 | static int __inject_float_mchk(struct kvm *kvm, | |
1386 | struct kvm_s390_interrupt_info *inti) | |
1387 | { | |
1388 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1389 | ||
1390 | spin_lock(&fi->lock); | |
1391 | fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS); | |
1392 | fi->mchk.mcic |= inti->mchk.mcic; | |
1393 | set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs); | |
1394 | spin_unlock(&fi->lock); | |
1395 | kfree(inti); | |
1396 | return 0; | |
1397 | } | |
1398 | ||
1399 | static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
fa6b7fe9 CH |
1400 | { |
1401 | struct kvm_s390_float_interrupt *fi; | |
6d3da241 JF |
1402 | struct list_head *list; |
1403 | int isc; | |
fa6b7fe9 | 1404 | |
fa6b7fe9 CH |
1405 | fi = &kvm->arch.float_int; |
1406 | spin_lock(&fi->lock); | |
6d3da241 JF |
1407 | if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) { |
1408 | spin_unlock(&fi->lock); | |
1409 | return -EBUSY; | |
a91b8ebe | 1410 | } |
6d3da241 JF |
1411 | fi->counters[FIRQ_CNTR_IO] += 1; |
1412 | ||
1413 | isc = int_word_to_isc(inti->io.io_int_word); | |
1414 | list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1415 | list_add_tail(&inti->list, list); | |
1416 | set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); | |
fa6b7fe9 | 1417 | spin_unlock(&fi->lock); |
6d3da241 | 1418 | return 0; |
fa6b7fe9 | 1419 | } |
ba5c1e9b | 1420 | |
96e0ed23 DH |
1421 | /* |
1422 | * Find a destination VCPU for a floating irq and kick it. | |
1423 | */ | |
1424 | static void __floating_irq_kick(struct kvm *kvm, u64 type) | |
ba5c1e9b | 1425 | { |
96e0ed23 | 1426 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
180c12fb | 1427 | struct kvm_s390_local_interrupt *li; |
96e0ed23 DH |
1428 | struct kvm_vcpu *dst_vcpu; |
1429 | int sigcpu, online_vcpus, nr_tries = 0; | |
1430 | ||
1431 | online_vcpus = atomic_read(&kvm->online_vcpus); | |
1432 | if (!online_vcpus) | |
1433 | return; | |
1434 | ||
1435 | /* find idle VCPUs first, then round robin */ | |
1436 | sigcpu = find_first_bit(fi->idle_mask, online_vcpus); | |
1437 | if (sigcpu == online_vcpus) { | |
1438 | do { | |
1439 | sigcpu = fi->next_rr_cpu; | |
1440 | fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus; | |
1441 | /* avoid endless loops if all vcpus are stopped */ | |
1442 | if (nr_tries++ >= online_vcpus) | |
1443 | return; | |
1444 | } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu))); | |
1445 | } | |
1446 | dst_vcpu = kvm_get_vcpu(kvm, sigcpu); | |
1447 | ||
1448 | /* make the VCPU drop out of the SIE, or wake it up if sleeping */ | |
1449 | li = &dst_vcpu->arch.local_int; | |
1450 | spin_lock(&li->lock); | |
1451 | switch (type) { | |
1452 | case KVM_S390_MCHK: | |
805de8f4 | 1453 | atomic_or(CPUSTAT_STOP_INT, li->cpuflags); |
96e0ed23 DH |
1454 | break; |
1455 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
805de8f4 | 1456 | atomic_or(CPUSTAT_IO_INT, li->cpuflags); |
96e0ed23 DH |
1457 | break; |
1458 | default: | |
805de8f4 | 1459 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
96e0ed23 DH |
1460 | break; |
1461 | } | |
1462 | spin_unlock(&li->lock); | |
1463 | kvm_s390_vcpu_wakeup(dst_vcpu); | |
1464 | } | |
1465 | ||
1466 | static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
1467 | { | |
6d3da241 JF |
1468 | u64 type = READ_ONCE(inti->type); |
1469 | int rc; | |
ba5c1e9b | 1470 | |
6d3da241 JF |
1471 | switch (type) { |
1472 | case KVM_S390_MCHK: | |
1473 | rc = __inject_float_mchk(kvm, inti); | |
1474 | break; | |
1475 | case KVM_S390_INT_VIRTIO: | |
1476 | rc = __inject_virtio(kvm, inti); | |
1477 | break; | |
1478 | case KVM_S390_INT_SERVICE: | |
1479 | rc = __inject_service(kvm, inti); | |
1480 | break; | |
1481 | case KVM_S390_INT_PFAULT_DONE: | |
1482 | rc = __inject_pfault_done(kvm, inti); | |
1483 | break; | |
1484 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1485 | rc = __inject_io(kvm, inti); | |
1486 | break; | |
1487 | default: | |
a91b8ebe | 1488 | rc = -EINVAL; |
c05c4186 | 1489 | } |
6d3da241 JF |
1490 | if (rc) |
1491 | return rc; | |
1492 | ||
96e0ed23 | 1493 | __floating_irq_kick(kvm, type); |
6d3da241 | 1494 | return 0; |
c05c4186 JF |
1495 | } |
1496 | ||
1497 | int kvm_s390_inject_vm(struct kvm *kvm, | |
1498 | struct kvm_s390_interrupt *s390int) | |
1499 | { | |
1500 | struct kvm_s390_interrupt_info *inti; | |
428d53be | 1501 | int rc; |
c05c4186 | 1502 | |
ba5c1e9b CO |
1503 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
1504 | if (!inti) | |
1505 | return -ENOMEM; | |
1506 | ||
c05c4186 JF |
1507 | inti->type = s390int->type; |
1508 | switch (inti->type) { | |
ba5c1e9b | 1509 | case KVM_S390_INT_VIRTIO: |
33e19115 | 1510 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b | 1511 | s390int->parm, s390int->parm64); |
ba5c1e9b CO |
1512 | inti->ext.ext_params = s390int->parm; |
1513 | inti->ext.ext_params2 = s390int->parm64; | |
1514 | break; | |
1515 | case KVM_S390_INT_SERVICE: | |
3f24ba15 | 1516 | VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm); |
ba5c1e9b CO |
1517 | inti->ext.ext_params = s390int->parm; |
1518 | break; | |
3c038e6b | 1519 | case KVM_S390_INT_PFAULT_DONE: |
3c038e6b DD |
1520 | inti->ext.ext_params2 = s390int->parm64; |
1521 | break; | |
48a3e950 | 1522 | case KVM_S390_MCHK: |
3f24ba15 | 1523 | VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx", |
48a3e950 | 1524 | s390int->parm64); |
48a3e950 CH |
1525 | inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
1526 | inti->mchk.mcic = s390int->parm64; | |
1527 | break; | |
d8346b7d | 1528 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
a37281b6 | 1529 | if (inti->type & KVM_S390_INT_IO_AI_MASK) |
d8346b7d CH |
1530 | VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)"); |
1531 | else | |
1532 | VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x", | |
1533 | s390int->type & IOINT_CSSID_MASK, | |
1534 | s390int->type & IOINT_SSID_MASK, | |
1535 | s390int->type & IOINT_SCHID_MASK); | |
d8346b7d CH |
1536 | inti->io.subchannel_id = s390int->parm >> 16; |
1537 | inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; | |
1538 | inti->io.io_int_parm = s390int->parm64 >> 32; | |
1539 | inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; | |
1540 | break; | |
ba5c1e9b CO |
1541 | default: |
1542 | kfree(inti); | |
1543 | return -EINVAL; | |
1544 | } | |
ade38c31 CH |
1545 | trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
1546 | 2); | |
ba5c1e9b | 1547 | |
428d53be DH |
1548 | rc = __inject_vm(kvm, inti); |
1549 | if (rc) | |
1550 | kfree(inti); | |
1551 | return rc; | |
ba5c1e9b CO |
1552 | } |
1553 | ||
15462e37 | 1554 | int kvm_s390_reinject_io_int(struct kvm *kvm, |
2f32d4ea CH |
1555 | struct kvm_s390_interrupt_info *inti) |
1556 | { | |
15462e37 | 1557 | return __inject_vm(kvm, inti); |
2f32d4ea CH |
1558 | } |
1559 | ||
383d0b05 JF |
1560 | int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
1561 | struct kvm_s390_irq *irq) | |
1562 | { | |
1563 | irq->type = s390int->type; | |
1564 | switch (irq->type) { | |
1565 | case KVM_S390_PROGRAM_INT: | |
1566 | if (s390int->parm & 0xffff0000) | |
1567 | return -EINVAL; | |
1568 | irq->u.pgm.code = s390int->parm; | |
1569 | break; | |
1570 | case KVM_S390_SIGP_SET_PREFIX: | |
1571 | irq->u.prefix.address = s390int->parm; | |
1572 | break; | |
2822545f DH |
1573 | case KVM_S390_SIGP_STOP: |
1574 | irq->u.stop.flags = s390int->parm; | |
1575 | break; | |
383d0b05 | 1576 | case KVM_S390_INT_EXTERNAL_CALL: |
94d1f564 | 1577 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1578 | return -EINVAL; |
1579 | irq->u.extcall.code = s390int->parm; | |
1580 | break; | |
1581 | case KVM_S390_INT_EMERGENCY: | |
94d1f564 | 1582 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1583 | return -EINVAL; |
1584 | irq->u.emerg.code = s390int->parm; | |
1585 | break; | |
1586 | case KVM_S390_MCHK: | |
1587 | irq->u.mchk.mcic = s390int->parm64; | |
1588 | break; | |
1589 | } | |
1590 | return 0; | |
1591 | } | |
1592 | ||
6cddd432 DH |
1593 | int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) |
1594 | { | |
1595 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1596 | ||
1597 | return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1598 | } | |
1599 | ||
1600 | void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) | |
1601 | { | |
1602 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1603 | ||
1604 | spin_lock(&li->lock); | |
1605 | li->irq.stop.flags = 0; | |
1606 | clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1607 | spin_unlock(&li->lock); | |
1608 | } | |
1609 | ||
79e87a10 | 1610 | static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
ba5c1e9b | 1611 | { |
0146a7b0 | 1612 | int rc; |
ba5c1e9b | 1613 | |
383d0b05 | 1614 | switch (irq->type) { |
ba5c1e9b | 1615 | case KVM_S390_PROGRAM_INT: |
383d0b05 | 1616 | rc = __inject_prog(vcpu, irq); |
ba5c1e9b | 1617 | break; |
b7e6e4d3 | 1618 | case KVM_S390_SIGP_SET_PREFIX: |
383d0b05 | 1619 | rc = __inject_set_prefix(vcpu, irq); |
b7e6e4d3 | 1620 | break; |
ba5c1e9b | 1621 | case KVM_S390_SIGP_STOP: |
383d0b05 | 1622 | rc = __inject_sigp_stop(vcpu, irq); |
0146a7b0 | 1623 | break; |
ba5c1e9b | 1624 | case KVM_S390_RESTART: |
383d0b05 | 1625 | rc = __inject_sigp_restart(vcpu, irq); |
0146a7b0 | 1626 | break; |
e029ae5b | 1627 | case KVM_S390_INT_CLOCK_COMP: |
383d0b05 | 1628 | rc = __inject_ckc(vcpu); |
0146a7b0 | 1629 | break; |
e029ae5b | 1630 | case KVM_S390_INT_CPU_TIMER: |
383d0b05 | 1631 | rc = __inject_cpu_timer(vcpu); |
82a12737 | 1632 | break; |
7697e71f | 1633 | case KVM_S390_INT_EXTERNAL_CALL: |
383d0b05 | 1634 | rc = __inject_extcall(vcpu, irq); |
82a12737 | 1635 | break; |
ba5c1e9b | 1636 | case KVM_S390_INT_EMERGENCY: |
383d0b05 | 1637 | rc = __inject_sigp_emergency(vcpu, irq); |
ba5c1e9b | 1638 | break; |
48a3e950 | 1639 | case KVM_S390_MCHK: |
383d0b05 | 1640 | rc = __inject_mchk(vcpu, irq); |
48a3e950 | 1641 | break; |
3c038e6b | 1642 | case KVM_S390_INT_PFAULT_INIT: |
383d0b05 | 1643 | rc = __inject_pfault_init(vcpu, irq); |
3c038e6b | 1644 | break; |
ba5c1e9b CO |
1645 | case KVM_S390_INT_VIRTIO: |
1646 | case KVM_S390_INT_SERVICE: | |
d8346b7d | 1647 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
ba5c1e9b | 1648 | default: |
0146a7b0 | 1649 | rc = -EINVAL; |
ba5c1e9b | 1650 | } |
79e87a10 JF |
1651 | |
1652 | return rc; | |
1653 | } | |
1654 | ||
1655 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) | |
1656 | { | |
1657 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1658 | int rc; | |
1659 | ||
1660 | spin_lock(&li->lock); | |
1661 | rc = do_inject_vcpu(vcpu, irq); | |
4ae3c081 | 1662 | spin_unlock(&li->lock); |
0146a7b0 JF |
1663 | if (!rc) |
1664 | kvm_s390_vcpu_wakeup(vcpu); | |
0146a7b0 | 1665 | return rc; |
ba5c1e9b | 1666 | } |
c05c4186 | 1667 | |
6d3da241 | 1668 | static inline void clear_irq_list(struct list_head *_list) |
c05c4186 | 1669 | { |
6d3da241 | 1670 | struct kvm_s390_interrupt_info *inti, *n; |
c05c4186 | 1671 | |
6d3da241 | 1672 | list_for_each_entry_safe(inti, n, _list, list) { |
c05c4186 JF |
1673 | list_del(&inti->list); |
1674 | kfree(inti); | |
1675 | } | |
c05c4186 JF |
1676 | } |
1677 | ||
94aa033e JF |
1678 | static void inti_to_irq(struct kvm_s390_interrupt_info *inti, |
1679 | struct kvm_s390_irq *irq) | |
c05c4186 | 1680 | { |
94aa033e | 1681 | irq->type = inti->type; |
c05c4186 | 1682 | switch (inti->type) { |
3c038e6b DD |
1683 | case KVM_S390_INT_PFAULT_INIT: |
1684 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 | 1685 | case KVM_S390_INT_VIRTIO: |
94aa033e | 1686 | irq->u.ext = inti->ext; |
c05c4186 JF |
1687 | break; |
1688 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
94aa033e | 1689 | irq->u.io = inti->io; |
c05c4186 | 1690 | break; |
c05c4186 | 1691 | } |
c05c4186 JF |
1692 | } |
1693 | ||
6d3da241 JF |
1694 | void kvm_s390_clear_float_irqs(struct kvm *kvm) |
1695 | { | |
1696 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1697 | int i; | |
1698 | ||
1699 | spin_lock(&fi->lock); | |
f2ae45ed JF |
1700 | fi->pending_irqs = 0; |
1701 | memset(&fi->srv_signal, 0, sizeof(fi->srv_signal)); | |
1702 | memset(&fi->mchk, 0, sizeof(fi->mchk)); | |
6d3da241 JF |
1703 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1704 | clear_irq_list(&fi->lists[i]); | |
1705 | for (i = 0; i < FIRQ_MAX_COUNT; i++) | |
1706 | fi->counters[i] = 0; | |
1707 | spin_unlock(&fi->lock); | |
1708 | }; | |
1709 | ||
94aa033e | 1710 | static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len) |
c05c4186 JF |
1711 | { |
1712 | struct kvm_s390_interrupt_info *inti; | |
1713 | struct kvm_s390_float_interrupt *fi; | |
94aa033e | 1714 | struct kvm_s390_irq *buf; |
6d3da241 | 1715 | struct kvm_s390_irq *irq; |
94aa033e | 1716 | int max_irqs; |
c05c4186 JF |
1717 | int ret = 0; |
1718 | int n = 0; | |
6d3da241 | 1719 | int i; |
c05c4186 | 1720 | |
94aa033e JF |
1721 | if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0) |
1722 | return -EINVAL; | |
1723 | ||
1724 | /* | |
1725 | * We are already using -ENOMEM to signal | |
1726 | * userspace it may retry with a bigger buffer, | |
1727 | * so we need to use something else for this case | |
1728 | */ | |
1729 | buf = vzalloc(len); | |
1730 | if (!buf) | |
1731 | return -ENOBUFS; | |
1732 | ||
1733 | max_irqs = len / sizeof(struct kvm_s390_irq); | |
1734 | ||
c05c4186 JF |
1735 | fi = &kvm->arch.float_int; |
1736 | spin_lock(&fi->lock); | |
6d3da241 JF |
1737 | for (i = 0; i < FIRQ_LIST_COUNT; i++) { |
1738 | list_for_each_entry(inti, &fi->lists[i], list) { | |
1739 | if (n == max_irqs) { | |
1740 | /* signal userspace to try again */ | |
1741 | ret = -ENOMEM; | |
1742 | goto out; | |
1743 | } | |
1744 | inti_to_irq(inti, &buf[n]); | |
1745 | n++; | |
1746 | } | |
1747 | } | |
1748 | if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) { | |
94aa033e | 1749 | if (n == max_irqs) { |
c05c4186 JF |
1750 | /* signal userspace to try again */ |
1751 | ret = -ENOMEM; | |
6d3da241 | 1752 | goto out; |
c05c4186 | 1753 | } |
6d3da241 JF |
1754 | irq = (struct kvm_s390_irq *) &buf[n]; |
1755 | irq->type = KVM_S390_INT_SERVICE; | |
1756 | irq->u.ext = fi->srv_signal; | |
c05c4186 JF |
1757 | n++; |
1758 | } | |
6d3da241 JF |
1759 | if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
1760 | if (n == max_irqs) { | |
1761 | /* signal userspace to try again */ | |
1762 | ret = -ENOMEM; | |
1763 | goto out; | |
1764 | } | |
1765 | irq = (struct kvm_s390_irq *) &buf[n]; | |
1766 | irq->type = KVM_S390_MCHK; | |
1767 | irq->u.mchk = fi->mchk; | |
1768 | n++; | |
1769 | } | |
1770 | ||
1771 | out: | |
c05c4186 | 1772 | spin_unlock(&fi->lock); |
94aa033e JF |
1773 | if (!ret && n > 0) { |
1774 | if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n)) | |
1775 | ret = -EFAULT; | |
1776 | } | |
1777 | vfree(buf); | |
c05c4186 JF |
1778 | |
1779 | return ret < 0 ? ret : n; | |
1780 | } | |
1781 | ||
1782 | static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) | |
1783 | { | |
1784 | int r; | |
1785 | ||
1786 | switch (attr->group) { | |
1787 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
94aa033e | 1788 | r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr, |
c05c4186 JF |
1789 | attr->attr); |
1790 | break; | |
1791 | default: | |
1792 | r = -EINVAL; | |
1793 | } | |
1794 | ||
1795 | return r; | |
1796 | } | |
1797 | ||
1798 | static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, | |
1799 | u64 addr) | |
1800 | { | |
1801 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1802 | void *target = NULL; | |
1803 | void __user *source; | |
1804 | u64 size; | |
1805 | ||
1806 | if (get_user(inti->type, (u64 __user *)addr)) | |
1807 | return -EFAULT; | |
1808 | ||
1809 | switch (inti->type) { | |
3c038e6b DD |
1810 | case KVM_S390_INT_PFAULT_INIT: |
1811 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1812 | case KVM_S390_INT_VIRTIO: |
1813 | case KVM_S390_INT_SERVICE: | |
1814 | target = (void *) &inti->ext; | |
1815 | source = &uptr->u.ext; | |
1816 | size = sizeof(inti->ext); | |
1817 | break; | |
1818 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1819 | target = (void *) &inti->io; | |
1820 | source = &uptr->u.io; | |
1821 | size = sizeof(inti->io); | |
1822 | break; | |
1823 | case KVM_S390_MCHK: | |
1824 | target = (void *) &inti->mchk; | |
1825 | source = &uptr->u.mchk; | |
1826 | size = sizeof(inti->mchk); | |
1827 | break; | |
1828 | default: | |
1829 | return -EINVAL; | |
1830 | } | |
1831 | ||
1832 | if (copy_from_user(target, source, size)) | |
1833 | return -EFAULT; | |
1834 | ||
1835 | return 0; | |
1836 | } | |
1837 | ||
1838 | static int enqueue_floating_irq(struct kvm_device *dev, | |
1839 | struct kvm_device_attr *attr) | |
1840 | { | |
1841 | struct kvm_s390_interrupt_info *inti = NULL; | |
1842 | int r = 0; | |
1843 | int len = attr->attr; | |
1844 | ||
1845 | if (len % sizeof(struct kvm_s390_irq) != 0) | |
1846 | return -EINVAL; | |
1847 | else if (len > KVM_S390_FLIC_MAX_BUFFER) | |
1848 | return -EINVAL; | |
1849 | ||
1850 | while (len >= sizeof(struct kvm_s390_irq)) { | |
1851 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
1852 | if (!inti) | |
1853 | return -ENOMEM; | |
1854 | ||
1855 | r = copy_irq_from_user(inti, attr->addr); | |
1856 | if (r) { | |
1857 | kfree(inti); | |
1858 | return r; | |
1859 | } | |
a91b8ebe JF |
1860 | r = __inject_vm(dev->kvm, inti); |
1861 | if (r) { | |
1862 | kfree(inti); | |
1863 | return r; | |
1864 | } | |
c05c4186 JF |
1865 | len -= sizeof(struct kvm_s390_irq); |
1866 | attr->addr += sizeof(struct kvm_s390_irq); | |
1867 | } | |
1868 | ||
1869 | return r; | |
1870 | } | |
1871 | ||
841b91c5 CH |
1872 | static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
1873 | { | |
1874 | if (id >= MAX_S390_IO_ADAPTERS) | |
1875 | return NULL; | |
1876 | return kvm->arch.adapters[id]; | |
1877 | } | |
1878 | ||
1879 | static int register_io_adapter(struct kvm_device *dev, | |
1880 | struct kvm_device_attr *attr) | |
1881 | { | |
1882 | struct s390_io_adapter *adapter; | |
1883 | struct kvm_s390_io_adapter adapter_info; | |
1884 | ||
1885 | if (copy_from_user(&adapter_info, | |
1886 | (void __user *)attr->addr, sizeof(adapter_info))) | |
1887 | return -EFAULT; | |
1888 | ||
1889 | if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || | |
1890 | (dev->kvm->arch.adapters[adapter_info.id] != NULL)) | |
1891 | return -EINVAL; | |
1892 | ||
1893 | adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); | |
1894 | if (!adapter) | |
1895 | return -ENOMEM; | |
1896 | ||
1897 | INIT_LIST_HEAD(&adapter->maps); | |
1898 | init_rwsem(&adapter->maps_lock); | |
1899 | atomic_set(&adapter->nr_maps, 0); | |
1900 | adapter->id = adapter_info.id; | |
1901 | adapter->isc = adapter_info.isc; | |
1902 | adapter->maskable = adapter_info.maskable; | |
1903 | adapter->masked = false; | |
1904 | adapter->swap = adapter_info.swap; | |
1905 | dev->kvm->arch.adapters[adapter->id] = adapter; | |
1906 | ||
1907 | return 0; | |
1908 | } | |
1909 | ||
1910 | int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) | |
1911 | { | |
1912 | int ret; | |
1913 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1914 | ||
1915 | if (!adapter || !adapter->maskable) | |
1916 | return -EINVAL; | |
1917 | ret = adapter->masked; | |
1918 | adapter->masked = masked; | |
1919 | return ret; | |
1920 | } | |
1921 | ||
1922 | static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) | |
1923 | { | |
1924 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1925 | struct s390_map_info *map; | |
1926 | int ret; | |
1927 | ||
1928 | if (!adapter || !addr) | |
1929 | return -EINVAL; | |
1930 | ||
1931 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
1932 | if (!map) { | |
1933 | ret = -ENOMEM; | |
1934 | goto out; | |
1935 | } | |
1936 | INIT_LIST_HEAD(&map->list); | |
1937 | map->guest_addr = addr; | |
6e0a0431 | 1938 | map->addr = gmap_translate(kvm->arch.gmap, addr); |
841b91c5 CH |
1939 | if (map->addr == -EFAULT) { |
1940 | ret = -EFAULT; | |
1941 | goto out; | |
1942 | } | |
1943 | ret = get_user_pages_fast(map->addr, 1, 1, &map->page); | |
1944 | if (ret < 0) | |
1945 | goto out; | |
1946 | BUG_ON(ret != 1); | |
1947 | down_write(&adapter->maps_lock); | |
1948 | if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { | |
1949 | list_add_tail(&map->list, &adapter->maps); | |
1950 | ret = 0; | |
1951 | } else { | |
1952 | put_page(map->page); | |
1953 | ret = -EINVAL; | |
1954 | } | |
1955 | up_write(&adapter->maps_lock); | |
1956 | out: | |
1957 | if (ret) | |
1958 | kfree(map); | |
1959 | return ret; | |
1960 | } | |
1961 | ||
1962 | static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) | |
1963 | { | |
1964 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1965 | struct s390_map_info *map, *tmp; | |
1966 | int found = 0; | |
1967 | ||
1968 | if (!adapter || !addr) | |
1969 | return -EINVAL; | |
1970 | ||
1971 | down_write(&adapter->maps_lock); | |
1972 | list_for_each_entry_safe(map, tmp, &adapter->maps, list) { | |
1973 | if (map->guest_addr == addr) { | |
1974 | found = 1; | |
1975 | atomic_dec(&adapter->nr_maps); | |
1976 | list_del(&map->list); | |
1977 | put_page(map->page); | |
1978 | kfree(map); | |
1979 | break; | |
1980 | } | |
1981 | } | |
1982 | up_write(&adapter->maps_lock); | |
1983 | ||
1984 | return found ? 0 : -EINVAL; | |
1985 | } | |
1986 | ||
1987 | void kvm_s390_destroy_adapters(struct kvm *kvm) | |
1988 | { | |
1989 | int i; | |
1990 | struct s390_map_info *map, *tmp; | |
1991 | ||
1992 | for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { | |
1993 | if (!kvm->arch.adapters[i]) | |
1994 | continue; | |
1995 | list_for_each_entry_safe(map, tmp, | |
1996 | &kvm->arch.adapters[i]->maps, list) { | |
1997 | list_del(&map->list); | |
1998 | put_page(map->page); | |
1999 | kfree(map); | |
2000 | } | |
2001 | kfree(kvm->arch.adapters[i]); | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | static int modify_io_adapter(struct kvm_device *dev, | |
2006 | struct kvm_device_attr *attr) | |
2007 | { | |
2008 | struct kvm_s390_io_adapter_req req; | |
2009 | struct s390_io_adapter *adapter; | |
2010 | int ret; | |
2011 | ||
2012 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
2013 | return -EFAULT; | |
2014 | ||
2015 | adapter = get_io_adapter(dev->kvm, req.id); | |
2016 | if (!adapter) | |
2017 | return -EINVAL; | |
2018 | switch (req.type) { | |
2019 | case KVM_S390_IO_ADAPTER_MASK: | |
2020 | ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); | |
2021 | if (ret > 0) | |
2022 | ret = 0; | |
2023 | break; | |
2024 | case KVM_S390_IO_ADAPTER_MAP: | |
2025 | ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); | |
2026 | break; | |
2027 | case KVM_S390_IO_ADAPTER_UNMAP: | |
2028 | ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); | |
2029 | break; | |
2030 | default: | |
2031 | ret = -EINVAL; | |
2032 | } | |
2033 | ||
2034 | return ret; | |
2035 | } | |
2036 | ||
c05c4186 JF |
2037 | static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
2038 | { | |
2039 | int r = 0; | |
3c038e6b DD |
2040 | unsigned int i; |
2041 | struct kvm_vcpu *vcpu; | |
c05c4186 JF |
2042 | |
2043 | switch (attr->group) { | |
2044 | case KVM_DEV_FLIC_ENQUEUE: | |
2045 | r = enqueue_floating_irq(dev, attr); | |
2046 | break; | |
2047 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
67335e63 | 2048 | kvm_s390_clear_float_irqs(dev->kvm); |
c05c4186 | 2049 | break; |
3c038e6b DD |
2050 | case KVM_DEV_FLIC_APF_ENABLE: |
2051 | dev->kvm->arch.gmap->pfault_enabled = 1; | |
2052 | break; | |
2053 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
2054 | dev->kvm->arch.gmap->pfault_enabled = 0; | |
2055 | /* | |
2056 | * Make sure no async faults are in transition when | |
2057 | * clearing the queues. So we don't need to worry | |
2058 | * about late coming workers. | |
2059 | */ | |
2060 | synchronize_srcu(&dev->kvm->srcu); | |
2061 | kvm_for_each_vcpu(i, vcpu, dev->kvm) | |
2062 | kvm_clear_async_pf_completion_queue(vcpu); | |
2063 | break; | |
841b91c5 CH |
2064 | case KVM_DEV_FLIC_ADAPTER_REGISTER: |
2065 | r = register_io_adapter(dev, attr); | |
2066 | break; | |
2067 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
2068 | r = modify_io_adapter(dev, attr); | |
2069 | break; | |
c05c4186 JF |
2070 | default: |
2071 | r = -EINVAL; | |
2072 | } | |
2073 | ||
2074 | return r; | |
2075 | } | |
2076 | ||
2077 | static int flic_create(struct kvm_device *dev, u32 type) | |
2078 | { | |
2079 | if (!dev) | |
2080 | return -EINVAL; | |
2081 | if (dev->kvm->arch.flic) | |
2082 | return -EINVAL; | |
2083 | dev->kvm->arch.flic = dev; | |
2084 | return 0; | |
2085 | } | |
2086 | ||
2087 | static void flic_destroy(struct kvm_device *dev) | |
2088 | { | |
2089 | dev->kvm->arch.flic = NULL; | |
2090 | kfree(dev); | |
2091 | } | |
2092 | ||
2093 | /* s390 floating irq controller (flic) */ | |
2094 | struct kvm_device_ops kvm_flic_ops = { | |
2095 | .name = "kvm-flic", | |
2096 | .get_attr = flic_get_attr, | |
2097 | .set_attr = flic_set_attr, | |
2098 | .create = flic_create, | |
2099 | .destroy = flic_destroy, | |
2100 | }; | |
84223598 CH |
2101 | |
2102 | static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) | |
2103 | { | |
2104 | unsigned long bit; | |
2105 | ||
2106 | bit = bit_nr + (addr % PAGE_SIZE) * 8; | |
2107 | ||
2108 | return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; | |
2109 | } | |
2110 | ||
2111 | static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, | |
2112 | u64 addr) | |
2113 | { | |
2114 | struct s390_map_info *map; | |
2115 | ||
2116 | if (!adapter) | |
2117 | return NULL; | |
2118 | ||
2119 | list_for_each_entry(map, &adapter->maps, list) { | |
2120 | if (map->guest_addr == addr) | |
2121 | return map; | |
2122 | } | |
2123 | return NULL; | |
2124 | } | |
2125 | ||
2126 | static int adapter_indicators_set(struct kvm *kvm, | |
2127 | struct s390_io_adapter *adapter, | |
2128 | struct kvm_s390_adapter_int *adapter_int) | |
2129 | { | |
2130 | unsigned long bit; | |
2131 | int summary_set, idx; | |
2132 | struct s390_map_info *info; | |
2133 | void *map; | |
2134 | ||
2135 | info = get_map_info(adapter, adapter_int->ind_addr); | |
2136 | if (!info) | |
2137 | return -1; | |
2138 | map = page_address(info->page); | |
2139 | bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); | |
2140 | set_bit(bit, map); | |
2141 | idx = srcu_read_lock(&kvm->srcu); | |
2142 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2143 | set_page_dirty_lock(info->page); | |
2144 | info = get_map_info(adapter, adapter_int->summary_addr); | |
2145 | if (!info) { | |
2146 | srcu_read_unlock(&kvm->srcu, idx); | |
2147 | return -1; | |
2148 | } | |
2149 | map = page_address(info->page); | |
2150 | bit = get_ind_bit(info->addr, adapter_int->summary_offset, | |
2151 | adapter->swap); | |
2152 | summary_set = test_and_set_bit(bit, map); | |
2153 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2154 | set_page_dirty_lock(info->page); | |
2155 | srcu_read_unlock(&kvm->srcu, idx); | |
2156 | return summary_set ? 0 : 1; | |
2157 | } | |
2158 | ||
2159 | /* | |
2160 | * < 0 - not injected due to error | |
2161 | * = 0 - coalesced, summary indicator already active | |
2162 | * > 0 - injected interrupt | |
2163 | */ | |
2164 | static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, | |
2165 | struct kvm *kvm, int irq_source_id, int level, | |
2166 | bool line_status) | |
2167 | { | |
2168 | int ret; | |
2169 | struct s390_io_adapter *adapter; | |
2170 | ||
2171 | /* We're only interested in the 0->1 transition. */ | |
2172 | if (!level) | |
2173 | return 0; | |
2174 | adapter = get_io_adapter(kvm, e->adapter.adapter_id); | |
2175 | if (!adapter) | |
2176 | return -1; | |
2177 | down_read(&adapter->maps_lock); | |
2178 | ret = adapter_indicators_set(kvm, adapter, &e->adapter); | |
2179 | up_read(&adapter->maps_lock); | |
2180 | if ((ret > 0) && !adapter->masked) { | |
2181 | struct kvm_s390_interrupt s390int = { | |
2182 | .type = KVM_S390_INT_IO(1, 0, 0, 0), | |
2183 | .parm = 0, | |
2184 | .parm64 = (adapter->isc << 27) | 0x80000000, | |
2185 | }; | |
2186 | ret = kvm_s390_inject_vm(kvm, &s390int); | |
2187 | if (ret == 0) | |
2188 | ret = 1; | |
2189 | } | |
2190 | return ret; | |
2191 | } | |
2192 | ||
8ba918d4 | 2193 | int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
84223598 CH |
2194 | const struct kvm_irq_routing_entry *ue) |
2195 | { | |
2196 | int ret; | |
2197 | ||
2198 | switch (ue->type) { | |
2199 | case KVM_IRQ_ROUTING_S390_ADAPTER: | |
2200 | e->set = set_adapter_int; | |
2201 | e->adapter.summary_addr = ue->u.adapter.summary_addr; | |
2202 | e->adapter.ind_addr = ue->u.adapter.ind_addr; | |
2203 | e->adapter.summary_offset = ue->u.adapter.summary_offset; | |
2204 | e->adapter.ind_offset = ue->u.adapter.ind_offset; | |
2205 | e->adapter.adapter_id = ue->u.adapter.adapter_id; | |
2206 | ret = 0; | |
2207 | break; | |
2208 | default: | |
2209 | ret = -EINVAL; | |
2210 | } | |
2211 | ||
2212 | return ret; | |
2213 | } | |
2214 | ||
2215 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, | |
2216 | int irq_source_id, int level, bool line_status) | |
2217 | { | |
2218 | return -EINVAL; | |
2219 | } | |
816c7667 JF |
2220 | |
2221 | int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len) | |
2222 | { | |
2223 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2224 | struct kvm_s390_irq *buf; | |
2225 | int r = 0; | |
2226 | int n; | |
2227 | ||
2228 | buf = vmalloc(len); | |
2229 | if (!buf) | |
2230 | return -ENOMEM; | |
2231 | ||
2232 | if (copy_from_user((void *) buf, irqstate, len)) { | |
2233 | r = -EFAULT; | |
2234 | goto out_free; | |
2235 | } | |
2236 | ||
2237 | /* | |
2238 | * Don't allow setting the interrupt state | |
2239 | * when there are already interrupts pending | |
2240 | */ | |
2241 | spin_lock(&li->lock); | |
2242 | if (li->pending_irqs) { | |
2243 | r = -EBUSY; | |
2244 | goto out_unlock; | |
2245 | } | |
2246 | ||
2247 | for (n = 0; n < len / sizeof(*buf); n++) { | |
2248 | r = do_inject_vcpu(vcpu, &buf[n]); | |
2249 | if (r) | |
2250 | break; | |
2251 | } | |
2252 | ||
2253 | out_unlock: | |
2254 | spin_unlock(&li->lock); | |
2255 | out_free: | |
2256 | vfree(buf); | |
2257 | ||
2258 | return r; | |
2259 | } | |
2260 | ||
2261 | static void store_local_irq(struct kvm_s390_local_interrupt *li, | |
2262 | struct kvm_s390_irq *irq, | |
2263 | unsigned long irq_type) | |
2264 | { | |
2265 | switch (irq_type) { | |
2266 | case IRQ_PEND_MCHK_EX: | |
2267 | case IRQ_PEND_MCHK_REP: | |
2268 | irq->type = KVM_S390_MCHK; | |
2269 | irq->u.mchk = li->irq.mchk; | |
2270 | break; | |
2271 | case IRQ_PEND_PROG: | |
2272 | irq->type = KVM_S390_PROGRAM_INT; | |
2273 | irq->u.pgm = li->irq.pgm; | |
2274 | break; | |
2275 | case IRQ_PEND_PFAULT_INIT: | |
2276 | irq->type = KVM_S390_INT_PFAULT_INIT; | |
2277 | irq->u.ext = li->irq.ext; | |
2278 | break; | |
2279 | case IRQ_PEND_EXT_EXTERNAL: | |
2280 | irq->type = KVM_S390_INT_EXTERNAL_CALL; | |
2281 | irq->u.extcall = li->irq.extcall; | |
2282 | break; | |
2283 | case IRQ_PEND_EXT_CLOCK_COMP: | |
2284 | irq->type = KVM_S390_INT_CLOCK_COMP; | |
2285 | break; | |
2286 | case IRQ_PEND_EXT_CPU_TIMER: | |
2287 | irq->type = KVM_S390_INT_CPU_TIMER; | |
2288 | break; | |
2289 | case IRQ_PEND_SIGP_STOP: | |
2290 | irq->type = KVM_S390_SIGP_STOP; | |
2291 | irq->u.stop = li->irq.stop; | |
2292 | break; | |
2293 | case IRQ_PEND_RESTART: | |
2294 | irq->type = KVM_S390_RESTART; | |
2295 | break; | |
2296 | case IRQ_PEND_SET_PREFIX: | |
2297 | irq->type = KVM_S390_SIGP_SET_PREFIX; | |
2298 | irq->u.prefix = li->irq.prefix; | |
2299 | break; | |
2300 | } | |
2301 | } | |
2302 | ||
2303 | int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len) | |
2304 | { | |
a5bd7647 | 2305 | int scn; |
816c7667 JF |
2306 | unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)]; |
2307 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2308 | unsigned long pending_irqs; | |
2309 | struct kvm_s390_irq irq; | |
2310 | unsigned long irq_type; | |
2311 | int cpuaddr; | |
2312 | int n = 0; | |
2313 | ||
2314 | spin_lock(&li->lock); | |
2315 | pending_irqs = li->pending_irqs; | |
2316 | memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending, | |
2317 | sizeof(sigp_emerg_pending)); | |
2318 | spin_unlock(&li->lock); | |
2319 | ||
2320 | for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) { | |
2321 | memset(&irq, 0, sizeof(irq)); | |
2322 | if (irq_type == IRQ_PEND_EXT_EMERGENCY) | |
2323 | continue; | |
2324 | if (n + sizeof(irq) > len) | |
2325 | return -ENOBUFS; | |
2326 | store_local_irq(&vcpu->arch.local_int, &irq, irq_type); | |
2327 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2328 | return -EFAULT; | |
2329 | n += sizeof(irq); | |
2330 | } | |
2331 | ||
2332 | if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) { | |
2333 | for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) { | |
2334 | memset(&irq, 0, sizeof(irq)); | |
2335 | if (n + sizeof(irq) > len) | |
2336 | return -ENOBUFS; | |
2337 | irq.type = KVM_S390_INT_EMERGENCY; | |
2338 | irq.u.emerg.code = cpuaddr; | |
2339 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2340 | return -EFAULT; | |
2341 | n += sizeof(irq); | |
2342 | } | |
2343 | } | |
2344 | ||
a5bd7647 | 2345 | if (sca_ext_call_pending(vcpu, &scn)) { |
816c7667 JF |
2346 | if (n + sizeof(irq) > len) |
2347 | return -ENOBUFS; | |
2348 | memset(&irq, 0, sizeof(irq)); | |
2349 | irq.type = KVM_S390_INT_EXTERNAL_CALL; | |
a5bd7647 | 2350 | irq.u.extcall.code = scn; |
816c7667 JF |
2351 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) |
2352 | return -EFAULT; | |
2353 | n += sizeof(irq); | |
2354 | } | |
2355 | ||
2356 | return n; | |
2357 | } |