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d809aa23 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ba5c1e9b | 2 | /* |
a53c8fab | 3 | * handling kvm guest interrupts |
ba5c1e9b | 4 | * |
33b412ac | 5 | * Copyright IBM Corp. 2008, 2015 |
ba5c1e9b | 6 | * |
ba5c1e9b CO |
7 | * Author(s): Carsten Otte <cotte@de.ibm.com> |
8 | */ | |
9 | ||
ca872302 | 10 | #include <linux/interrupt.h> |
ba5c1e9b | 11 | #include <linux/kvm_host.h> |
cbb870c8 | 12 | #include <linux/hrtimer.h> |
84223598 | 13 | #include <linux/mmu_context.h> |
3cd61299 | 14 | #include <linux/signal.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
383d0b05 | 16 | #include <linux/bitmap.h> |
94aa033e | 17 | #include <linux/vmalloc.h> |
cbb870c8 | 18 | #include <asm/asm-offsets.h> |
33b412ac | 19 | #include <asm/dis.h> |
7c0f6ba6 | 20 | #include <linux/uaccess.h> |
ea5f4969 | 21 | #include <asm/sclp.h> |
6d3da241 | 22 | #include <asm/isc.h> |
1e133ab2 | 23 | #include <asm/gmap.h> |
0319dae6 | 24 | #include <asm/switch_to.h> |
ff5dc149 | 25 | #include <asm/nmi.h> |
ba5c1e9b CO |
26 | #include "kvm-s390.h" |
27 | #include "gaccess.h" | |
ade38c31 | 28 | #include "trace-s390.h" |
ba5c1e9b | 29 | |
44c6ca3d | 30 | #define PFAULT_INIT 0x0600 |
60f90a14 JF |
31 | #define PFAULT_DONE 0x0680 |
32 | #define VIRTIO_PARAM 0x0d00 | |
d8346b7d | 33 | |
a5bd7647 ED |
34 | /* handle external calls via sigp interpretation facility */ |
35 | static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id) | |
36 | { | |
7d43bafc ED |
37 | int c, scn; |
38 | ||
8d5fb0dc | 39 | if (!kvm_s390_test_cpuflags(vcpu, CPUSTAT_ECALL_PEND)) |
2c1bb2be DH |
40 | return 0; |
41 | ||
a6940674 | 42 | BUG_ON(!kvm_s390_use_sca_entries()); |
5e044315 | 43 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
44 | if (vcpu->kvm->arch.use_esca) { |
45 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
46 | union esca_sigp_ctrl sigp_ctrl = | |
47 | sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
48 | ||
49 | c = sigp_ctrl.c; | |
50 | scn = sigp_ctrl.scn; | |
51 | } else { | |
52 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
53 | union bsca_sigp_ctrl sigp_ctrl = | |
54 | sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
55 | ||
56 | c = sigp_ctrl.c; | |
57 | scn = sigp_ctrl.scn; | |
58 | } | |
5e044315 | 59 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a5bd7647 ED |
60 | |
61 | if (src_id) | |
7d43bafc | 62 | *src_id = scn; |
a5bd7647 | 63 | |
2c1bb2be | 64 | return c; |
a5bd7647 ED |
65 | } |
66 | ||
67 | static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id) | |
68 | { | |
bc784cce | 69 | int expect, rc; |
a5bd7647 | 70 | |
a6940674 | 71 | BUG_ON(!kvm_s390_use_sca_entries()); |
5e044315 | 72 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
73 | if (vcpu->kvm->arch.use_esca) { |
74 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
75 | union esca_sigp_ctrl *sigp_ctrl = | |
76 | &(sca->cpu[vcpu->vcpu_id].sigp_ctrl); | |
77 | union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl; | |
78 | ||
79 | new_val.scn = src_id; | |
80 | new_val.c = 1; | |
81 | old_val.c = 0; | |
82 | ||
83 | expect = old_val.value; | |
84 | rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value); | |
85 | } else { | |
86 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
87 | union bsca_sigp_ctrl *sigp_ctrl = | |
88 | &(sca->cpu[vcpu->vcpu_id].sigp_ctrl); | |
89 | union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl; | |
bc784cce | 90 | |
7d43bafc ED |
91 | new_val.scn = src_id; |
92 | new_val.c = 1; | |
93 | old_val.c = 0; | |
94 | ||
95 | expect = old_val.value; | |
96 | rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value); | |
97 | } | |
5e044315 | 98 | read_unlock(&vcpu->kvm->arch.sca_lock); |
bc784cce ED |
99 | |
100 | if (rc != expect) { | |
a5bd7647 ED |
101 | /* another external call is pending */ |
102 | return -EBUSY; | |
103 | } | |
ef8f4f49 | 104 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_ECALL_PEND); |
a5bd7647 ED |
105 | return 0; |
106 | } | |
107 | ||
108 | static void sca_clear_ext_call(struct kvm_vcpu *vcpu) | |
109 | { | |
7d43bafc | 110 | int rc, expect; |
a5bd7647 | 111 | |
a6940674 DH |
112 | if (!kvm_s390_use_sca_entries()) |
113 | return; | |
9daecfc6 | 114 | kvm_s390_clear_cpuflags(vcpu, CPUSTAT_ECALL_PEND); |
5e044315 | 115 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
116 | if (vcpu->kvm->arch.use_esca) { |
117 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
118 | union esca_sigp_ctrl *sigp_ctrl = | |
119 | &(sca->cpu[vcpu->vcpu_id].sigp_ctrl); | |
120 | union esca_sigp_ctrl old = *sigp_ctrl; | |
121 | ||
122 | expect = old.value; | |
123 | rc = cmpxchg(&sigp_ctrl->value, old.value, 0); | |
124 | } else { | |
125 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
126 | union bsca_sigp_ctrl *sigp_ctrl = | |
127 | &(sca->cpu[vcpu->vcpu_id].sigp_ctrl); | |
128 | union bsca_sigp_ctrl old = *sigp_ctrl; | |
129 | ||
130 | expect = old.value; | |
131 | rc = cmpxchg(&sigp_ctrl->value, old.value, 0); | |
132 | } | |
5e044315 | 133 | read_unlock(&vcpu->kvm->arch.sca_lock); |
7d43bafc | 134 | WARN_ON(rc != expect); /* cannot clear? */ |
a5bd7647 ED |
135 | } |
136 | ||
3c038e6b | 137 | int psw_extint_disabled(struct kvm_vcpu *vcpu) |
ba5c1e9b CO |
138 | { |
139 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
140 | } | |
141 | ||
d8346b7d CH |
142 | static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
143 | { | |
144 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); | |
145 | } | |
146 | ||
48a3e950 CH |
147 | static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
148 | { | |
149 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); | |
150 | } | |
151 | ||
ba5c1e9b CO |
152 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
153 | { | |
fee0e0fd DH |
154 | return psw_extint_disabled(vcpu) && |
155 | psw_ioint_disabled(vcpu) && | |
156 | psw_mchk_disabled(vcpu); | |
ba5c1e9b CO |
157 | } |
158 | ||
bb78c5ec DH |
159 | static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
160 | { | |
161 | if (psw_extint_disabled(vcpu) || | |
162 | !(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
163 | return 0; | |
f71d0dc5 DH |
164 | if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
165 | /* No timer interrupts when single stepping */ | |
166 | return 0; | |
bb78c5ec DH |
167 | return 1; |
168 | } | |
169 | ||
b4aec925 DH |
170 | static int ckc_irq_pending(struct kvm_vcpu *vcpu) |
171 | { | |
5fe01793 DH |
172 | const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm); |
173 | const u64 ckc = vcpu->arch.sie_block->ckc; | |
174 | ||
175 | if (vcpu->arch.sie_block->gcr[0] & 0x0020000000000000ul) { | |
176 | if ((s64)ckc >= (s64)now) | |
177 | return 0; | |
178 | } else if (ckc >= now) { | |
b4aec925 | 179 | return 0; |
5fe01793 | 180 | } |
b4aec925 DH |
181 | return ckc_interrupts_enabled(vcpu); |
182 | } | |
183 | ||
184 | static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu) | |
185 | { | |
186 | return !psw_extint_disabled(vcpu) && | |
187 | (vcpu->arch.sie_block->gcr[0] & 0x400ul); | |
188 | } | |
189 | ||
190 | static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu) | |
191 | { | |
4287f247 DH |
192 | if (!cpu_timer_interrupts_enabled(vcpu)) |
193 | return 0; | |
194 | return kvm_s390_get_cpu_timer(vcpu) >> 63; | |
b4aec925 DH |
195 | } |
196 | ||
6d3da241 JF |
197 | static uint64_t isc_to_isc_bits(int isc) |
198 | { | |
79fd50c6 CH |
199 | return (0x80 >> isc) << 24; |
200 | } | |
201 | ||
2496c8e7 MM |
202 | static inline u32 isc_to_int_word(u8 isc) |
203 | { | |
204 | return ((u32)isc << 27) | 0x80000000; | |
205 | } | |
206 | ||
6d3da241 | 207 | static inline u8 int_word_to_isc(u32 int_word) |
ba5c1e9b | 208 | { |
6d3da241 JF |
209 | return (int_word & 0x38000000) >> 27; |
210 | } | |
211 | ||
d77e6414 MM |
212 | /* |
213 | * To use atomic bitmap functions, we have to provide a bitmap address | |
214 | * that is u64 aligned. However, the ipm might be u32 aligned. | |
215 | * Therefore, we logically start the bitmap at the very beginning of the | |
216 | * struct and fixup the bit number. | |
217 | */ | |
218 | #define IPM_BIT_OFFSET (offsetof(struct kvm_s390_gisa, ipm) * BITS_PER_BYTE) | |
219 | ||
220 | static inline void kvm_s390_gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc) | |
221 | { | |
222 | set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); | |
223 | } | |
224 | ||
225 | static inline u8 kvm_s390_gisa_get_ipm(struct kvm_s390_gisa *gisa) | |
226 | { | |
227 | return READ_ONCE(gisa->ipm); | |
228 | } | |
229 | ||
230 | static inline void kvm_s390_gisa_clear_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc) | |
231 | { | |
232 | clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); | |
233 | } | |
234 | ||
235 | static inline int kvm_s390_gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc) | |
236 | { | |
237 | return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); | |
238 | } | |
239 | ||
8846f317 | 240 | static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu) |
6d3da241 | 241 | { |
5f94c58e | 242 | return vcpu->kvm->arch.float_int.pending_irqs | |
8846f317 CB |
243 | vcpu->arch.local_int.pending_irqs; |
244 | } | |
245 | ||
246 | static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) | |
247 | { | |
248 | return pending_irqs_no_gisa(vcpu) | | |
d7c5cb01 | 249 | kvm_s390_gisa_get_ipm(vcpu->kvm->arch.gisa) << IRQ_PEND_IO_ISC_7; |
383d0b05 JF |
250 | } |
251 | ||
ee739f4b MM |
252 | static inline int isc_to_irq_type(unsigned long isc) |
253 | { | |
c7901a6e | 254 | return IRQ_PEND_IO_ISC_0 - isc; |
ee739f4b MM |
255 | } |
256 | ||
257 | static inline int irq_type_to_isc(unsigned long irq_type) | |
258 | { | |
c7901a6e | 259 | return IRQ_PEND_IO_ISC_0 - irq_type; |
ee739f4b MM |
260 | } |
261 | ||
6d3da241 JF |
262 | static unsigned long disable_iscs(struct kvm_vcpu *vcpu, |
263 | unsigned long active_mask) | |
264 | { | |
265 | int i; | |
266 | ||
267 | for (i = 0; i <= MAX_ISC; i++) | |
268 | if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i))) | |
ee739f4b | 269 | active_mask &= ~(1UL << (isc_to_irq_type(i))); |
6d3da241 JF |
270 | |
271 | return active_mask; | |
272 | } | |
273 | ||
274 | static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu) | |
383d0b05 | 275 | { |
6d3da241 JF |
276 | unsigned long active_mask; |
277 | ||
5f94c58e | 278 | active_mask = pending_irqs(vcpu); |
ffeca0ae JF |
279 | if (!active_mask) |
280 | return 0; | |
383d0b05 JF |
281 | |
282 | if (psw_extint_disabled(vcpu)) | |
283 | active_mask &= ~IRQ_PEND_EXT_MASK; | |
6d3da241 JF |
284 | if (psw_ioint_disabled(vcpu)) |
285 | active_mask &= ~IRQ_PEND_IO_MASK; | |
286 | else | |
287 | active_mask = disable_iscs(vcpu, active_mask); | |
383d0b05 JF |
288 | if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul)) |
289 | __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask); | |
290 | if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul)) | |
291 | __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask); | |
292 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
293 | __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask); | |
294 | if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul)) | |
295 | __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask); | |
6d3da241 JF |
296 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) |
297 | __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask); | |
383d0b05 JF |
298 | if (psw_mchk_disabled(vcpu)) |
299 | active_mask &= ~IRQ_PEND_MCHK_MASK; | |
4d62fcc0 QH |
300 | /* |
301 | * Check both floating and local interrupt's cr14 because | |
302 | * bit IRQ_PEND_MCHK_REP could be set in both cases. | |
303 | */ | |
6d3da241 | 304 | if (!(vcpu->arch.sie_block->gcr[14] & |
4d62fcc0 QH |
305 | (vcpu->kvm->arch.float_int.mchk.cr14 | |
306 | vcpu->arch.local_int.irq.mchk.cr14))) | |
6d3da241 | 307 | __clear_bit(IRQ_PEND_MCHK_REP, &active_mask); |
383d0b05 | 308 | |
6cddd432 DH |
309 | /* |
310 | * STOP irqs will never be actively delivered. They are triggered via | |
311 | * intercept requests and cleared when the stop intercept is performed. | |
312 | */ | |
313 | __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask); | |
314 | ||
383d0b05 JF |
315 | return active_mask; |
316 | } | |
317 | ||
ba5c1e9b CO |
318 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
319 | { | |
ef8f4f49 | 320 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT); |
a9f6c9a9 | 321 | set_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask); |
ba5c1e9b CO |
322 | } |
323 | ||
324 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
325 | { | |
9daecfc6 | 326 | kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT); |
a9f6c9a9 | 327 | clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask); |
ba5c1e9b CO |
328 | } |
329 | ||
330 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
331 | { | |
9daecfc6 DH |
332 | kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT | |
333 | CPUSTAT_STOP_INT); | |
ba5c1e9b | 334 | vcpu->arch.sie_block->lctl = 0x0000; |
27291e21 DH |
335 | vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
336 | ||
337 | if (guestdbg_enabled(vcpu)) { | |
338 | vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | | |
339 | LCTL_CR10 | LCTL_CR11); | |
340 | vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); | |
341 | } | |
ba5c1e9b CO |
342 | } |
343 | ||
6d3da241 JF |
344 | static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) |
345 | { | |
8846f317 | 346 | if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK)) |
6d3da241 JF |
347 | return; |
348 | else if (psw_ioint_disabled(vcpu)) | |
2018224d | 349 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT); |
6d3da241 JF |
350 | else |
351 | vcpu->arch.sie_block->lctl |= LCTL_CR6; | |
352 | } | |
353 | ||
383d0b05 JF |
354 | static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) |
355 | { | |
5f94c58e | 356 | if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK)) |
383d0b05 JF |
357 | return; |
358 | if (psw_extint_disabled(vcpu)) | |
2018224d | 359 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
383d0b05 JF |
360 | else |
361 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
362 | } | |
363 | ||
364 | static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) | |
365 | { | |
5f94c58e | 366 | if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK)) |
383d0b05 JF |
367 | return; |
368 | if (psw_mchk_disabled(vcpu)) | |
369 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
370 | else | |
371 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
372 | } | |
373 | ||
6cddd432 DH |
374 | static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu) |
375 | { | |
376 | if (kvm_s390_is_stop_irq_pending(vcpu)) | |
2018224d | 377 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT); |
6cddd432 DH |
378 | } |
379 | ||
6d3da241 JF |
380 | /* Set interception request for non-deliverable interrupts */ |
381 | static void set_intercept_indicators(struct kvm_vcpu *vcpu) | |
383d0b05 | 382 | { |
6d3da241 | 383 | set_intercept_indicators_io(vcpu); |
383d0b05 JF |
384 | set_intercept_indicators_ext(vcpu); |
385 | set_intercept_indicators_mchk(vcpu); | |
6cddd432 | 386 | set_intercept_indicators_stop(vcpu); |
383d0b05 JF |
387 | } |
388 | ||
0fb97abe JF |
389 | static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) |
390 | { | |
383d0b05 | 391 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
392 | int rc; |
393 | ||
ccc40c53 | 394 | vcpu->stat.deliver_cputm++; |
0fb97abe JF |
395 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, |
396 | 0, 0); | |
397 | ||
398 | rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, | |
399 | (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 400 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
401 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
402 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
403 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
404 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 405 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
99e20009 | 406 | return rc ? -EFAULT : 0; |
0fb97abe JF |
407 | } |
408 | ||
409 | static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) | |
410 | { | |
383d0b05 | 411 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
412 | int rc; |
413 | ||
ccc40c53 | 414 | vcpu->stat.deliver_ckc++; |
0fb97abe JF |
415 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, |
416 | 0, 0); | |
417 | ||
418 | rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP, | |
419 | (u16 __user *)__LC_EXT_INT_CODE); | |
467fc298 | 420 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
421 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
422 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
423 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
424 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 425 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
99e20009 | 426 | return rc ? -EFAULT : 0; |
0fb97abe JF |
427 | } |
428 | ||
383d0b05 | 429 | static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) |
0fb97abe | 430 | { |
383d0b05 JF |
431 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
432 | struct kvm_s390_ext_info ext; | |
0fb97abe JF |
433 | int rc; |
434 | ||
383d0b05 JF |
435 | spin_lock(&li->lock); |
436 | ext = li->irq.ext; | |
437 | clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
438 | li->irq.ext.ext_params2 = 0; | |
439 | spin_unlock(&li->lock); | |
440 | ||
3f24ba15 CB |
441 | VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx", |
442 | ext.ext_params2); | |
0fb97abe JF |
443 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
444 | KVM_S390_INT_PFAULT_INIT, | |
383d0b05 | 445 | 0, ext.ext_params2); |
0fb97abe JF |
446 | |
447 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE); | |
448 | rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); | |
449 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
450 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
451 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
452 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 453 | rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); |
99e20009 | 454 | return rc ? -EFAULT : 0; |
0fb97abe JF |
455 | } |
456 | ||
d6404ded DH |
457 | static int __write_machine_check(struct kvm_vcpu *vcpu, |
458 | struct kvm_s390_mchk_info *mchk) | |
459 | { | |
460 | unsigned long ext_sa_addr; | |
4e0b1ab7 | 461 | unsigned long lc; |
0319dae6 | 462 | freg_t fprs[NUM_FPRS]; |
ff5dc149 | 463 | union mci mci; |
d6404ded DH |
464 | int rc; |
465 | ||
ff5dc149 | 466 | mci.val = mchk->mcic; |
31d8b8d4 | 467 | /* take care of lazy register loading */ |
0319dae6 DH |
468 | save_fpu_regs(); |
469 | save_access_regs(vcpu->run->s.regs.acrs); | |
80248559 CB |
470 | if (MACHINE_HAS_GS && vcpu->arch.gs_enabled) |
471 | save_gs_cb(current->thread.gs_cb); | |
0319dae6 | 472 | |
d6404ded | 473 | /* Extended save area */ |
916cda1a MS |
474 | rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr, |
475 | sizeof(unsigned long)); | |
4e0b1ab7 FZ |
476 | /* Only bits 0 through 63-LC are used for address formation */ |
477 | lc = ext_sa_addr & MCESA_LC_MASK; | |
478 | if (test_kvm_facility(vcpu->kvm, 133)) { | |
479 | switch (lc) { | |
480 | case 0: | |
481 | case 10: | |
482 | ext_sa_addr &= ~0x3ffUL; | |
483 | break; | |
484 | case 11: | |
485 | ext_sa_addr &= ~0x7ffUL; | |
486 | break; | |
487 | case 12: | |
488 | ext_sa_addr &= ~0xfffUL; | |
489 | break; | |
490 | default: | |
491 | ext_sa_addr = 0; | |
492 | break; | |
493 | } | |
494 | } else { | |
495 | ext_sa_addr &= ~0x3ffUL; | |
496 | } | |
497 | ||
ff5dc149 DH |
498 | if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) { |
499 | if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs, | |
500 | 512)) | |
501 | mci.vr = 0; | |
502 | } else { | |
503 | mci.vr = 0; | |
504 | } | |
4e0b1ab7 FZ |
505 | if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133) |
506 | && (lc == 11 || lc == 12)) { | |
507 | if (write_guest_abs(vcpu, ext_sa_addr + 1024, | |
508 | &vcpu->run->s.regs.gscb, 32)) | |
509 | mci.gs = 0; | |
510 | } else { | |
511 | mci.gs = 0; | |
512 | } | |
d6404ded DH |
513 | |
514 | /* General interruption information */ | |
0319dae6 | 515 | rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID); |
d6404ded DH |
516 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, |
517 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
518 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
519 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
ff5dc149 | 520 | rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE); |
d6404ded DH |
521 | |
522 | /* Register-save areas */ | |
0319dae6 DH |
523 | if (MACHINE_HAS_VX) { |
524 | convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); | |
525 | rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128); | |
526 | } else { | |
527 | rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, | |
528 | vcpu->run->s.regs.fprs, 128); | |
529 | } | |
530 | rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA, | |
531 | vcpu->run->s.regs.gprs, 128); | |
532 | rc |= put_guest_lc(vcpu, current->thread.fpu.fpc, | |
533 | (u32 __user *) __LC_FP_CREG_SAVE_AREA); | |
534 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr, | |
535 | (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA); | |
536 | rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu), | |
537 | (u64 __user *) __LC_CPU_TIMER_SAVE_AREA); | |
538 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8, | |
539 | (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA); | |
540 | rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA, | |
541 | &vcpu->run->s.regs.acrs, 64); | |
542 | rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA, | |
543 | &vcpu->arch.sie_block->gcr, 128); | |
d6404ded DH |
544 | |
545 | /* Extended interruption information */ | |
8953fb08 DH |
546 | rc |= put_guest_lc(vcpu, mchk->ext_damage_code, |
547 | (u32 __user *) __LC_EXT_DAMAGE_CODE); | |
d6404ded DH |
548 | rc |= put_guest_lc(vcpu, mchk->failing_storage_address, |
549 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); | |
550 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout, | |
551 | sizeof(mchk->fixed_logout)); | |
552 | return rc ? -EFAULT : 0; | |
553 | } | |
554 | ||
383d0b05 | 555 | static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) |
0fb97abe | 556 | { |
6d3da241 | 557 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
383d0b05 | 558 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
6d3da241 | 559 | struct kvm_s390_mchk_info mchk = {}; |
6d3da241 JF |
560 | int deliver = 0; |
561 | int rc = 0; | |
0fb97abe | 562 | |
6d3da241 | 563 | spin_lock(&fi->lock); |
383d0b05 | 564 | spin_lock(&li->lock); |
6d3da241 JF |
565 | if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) || |
566 | test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) { | |
567 | /* | |
568 | * If there was an exigent machine check pending, then any | |
569 | * repressible machine checks that might have been pending | |
570 | * are indicated along with it, so always clear bits for | |
571 | * repressible and exigent interrupts | |
572 | */ | |
573 | mchk = li->irq.mchk; | |
574 | clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
575 | clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
576 | memset(&li->irq.mchk, 0, sizeof(mchk)); | |
577 | deliver = 1; | |
578 | } | |
383d0b05 | 579 | /* |
6d3da241 JF |
580 | * We indicate floating repressible conditions along with |
581 | * other pending conditions. Channel Report Pending and Channel | |
582 | * Subsystem damage are the only two and and are indicated by | |
583 | * bits in mcic and masked in cr14. | |
383d0b05 | 584 | */ |
6d3da241 JF |
585 | if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
586 | mchk.mcic |= fi->mchk.mcic; | |
587 | mchk.cr14 |= fi->mchk.cr14; | |
588 | memset(&fi->mchk, 0, sizeof(mchk)); | |
589 | deliver = 1; | |
590 | } | |
383d0b05 | 591 | spin_unlock(&li->lock); |
6d3da241 | 592 | spin_unlock(&fi->lock); |
383d0b05 | 593 | |
6d3da241 | 594 | if (deliver) { |
3f24ba15 | 595 | VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx", |
6d3da241 JF |
596 | mchk.mcic); |
597 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
598 | KVM_S390_MCHK, | |
599 | mchk.cr14, mchk.mcic); | |
32de0749 | 600 | vcpu->stat.deliver_machine_check++; |
d6404ded | 601 | rc = __write_machine_check(vcpu, &mchk); |
6d3da241 | 602 | } |
d6404ded | 603 | return rc; |
0fb97abe JF |
604 | } |
605 | ||
606 | static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) | |
607 | { | |
383d0b05 | 608 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
609 | int rc; |
610 | ||
3f24ba15 | 611 | VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart"); |
0fb97abe JF |
612 | vcpu->stat.deliver_restart_signal++; |
613 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); | |
614 | ||
615 | rc = write_guest_lc(vcpu, | |
c667aeac | 616 | offsetof(struct lowcore, restart_old_psw), |
0fb97abe | 617 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
c667aeac | 618 | rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw), |
0fb97abe | 619 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
383d0b05 | 620 | clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
99e20009 | 621 | return rc ? -EFAULT : 0; |
0fb97abe JF |
622 | } |
623 | ||
383d0b05 | 624 | static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) |
0fb97abe | 625 | { |
383d0b05 JF |
626 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
627 | struct kvm_s390_prefix_info prefix; | |
628 | ||
629 | spin_lock(&li->lock); | |
630 | prefix = li->irq.prefix; | |
631 | li->irq.prefix.address = 0; | |
632 | clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
633 | spin_unlock(&li->lock); | |
0fb97abe | 634 | |
0fb97abe JF |
635 | vcpu->stat.deliver_prefix_signal++; |
636 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
637 | KVM_S390_SIGP_SET_PREFIX, | |
383d0b05 | 638 | prefix.address, 0); |
0fb97abe | 639 | |
383d0b05 | 640 | kvm_s390_set_prefix(vcpu, prefix.address); |
0fb97abe JF |
641 | return 0; |
642 | } | |
643 | ||
383d0b05 | 644 | static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) |
0fb97abe | 645 | { |
383d0b05 | 646 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe | 647 | int rc; |
383d0b05 JF |
648 | int cpu_addr; |
649 | ||
650 | spin_lock(&li->lock); | |
651 | cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
652 | clear_bit(cpu_addr, li->sigp_emerg_pending); | |
653 | if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) | |
654 | clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); | |
655 | spin_unlock(&li->lock); | |
0fb97abe | 656 | |
3f24ba15 | 657 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg"); |
0fb97abe | 658 | vcpu->stat.deliver_emergency_signal++; |
383d0b05 JF |
659 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
660 | cpu_addr, 0); | |
0fb97abe JF |
661 | |
662 | rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, | |
663 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 664 | rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
665 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
666 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
667 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
668 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 669 | return rc ? -EFAULT : 0; |
0fb97abe JF |
670 | } |
671 | ||
383d0b05 | 672 | static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) |
0fb97abe | 673 | { |
383d0b05 JF |
674 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
675 | struct kvm_s390_extcall_info extcall; | |
0fb97abe JF |
676 | int rc; |
677 | ||
383d0b05 JF |
678 | spin_lock(&li->lock); |
679 | extcall = li->irq.extcall; | |
680 | li->irq.extcall.code = 0; | |
681 | clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
682 | spin_unlock(&li->lock); | |
683 | ||
3f24ba15 | 684 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call"); |
0fb97abe JF |
685 | vcpu->stat.deliver_external_call++; |
686 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
687 | KVM_S390_INT_EXTERNAL_CALL, | |
383d0b05 | 688 | extcall.code, 0); |
0fb97abe JF |
689 | |
690 | rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, | |
691 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 692 | rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
693 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
694 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
695 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, | |
696 | sizeof(psw_t)); | |
99e20009 | 697 | return rc ? -EFAULT : 0; |
0fb97abe JF |
698 | } |
699 | ||
383d0b05 | 700 | static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) |
8712836b | 701 | { |
383d0b05 JF |
702 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
703 | struct kvm_s390_pgm_info pgm_info; | |
a9a846fd | 704 | int rc = 0, nullifying = false; |
634790b8 | 705 | u16 ilen; |
8712836b | 706 | |
383d0b05 JF |
707 | spin_lock(&li->lock); |
708 | pgm_info = li->irq.pgm; | |
709 | clear_bit(IRQ_PEND_PROG, &li->pending_irqs); | |
710 | memset(&li->irq.pgm, 0, sizeof(pgm_info)); | |
711 | spin_unlock(&li->lock); | |
712 | ||
634790b8 | 713 | ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK; |
0e8bc06a DH |
714 | VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d", |
715 | pgm_info.code, ilen); | |
ccc40c53 | 716 | vcpu->stat.deliver_program++; |
0fb97abe | 717 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, |
383d0b05 | 718 | pgm_info.code, 0); |
0fb97abe | 719 | |
383d0b05 | 720 | switch (pgm_info.code & ~PGM_PER) { |
8712836b DH |
721 | case PGM_AFX_TRANSLATION: |
722 | case PGM_ASX_TRANSLATION: | |
723 | case PGM_EX_TRANSLATION: | |
724 | case PGM_LFX_TRANSLATION: | |
725 | case PGM_LSTE_SEQUENCE: | |
726 | case PGM_LSX_TRANSLATION: | |
727 | case PGM_LX_TRANSLATION: | |
728 | case PGM_PRIMARY_AUTHORITY: | |
729 | case PGM_SECONDARY_AUTHORITY: | |
a9a846fd TH |
730 | nullifying = true; |
731 | /* fall through */ | |
8712836b | 732 | case PGM_SPACE_SWITCH: |
383d0b05 | 733 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b DH |
734 | (u64 *)__LC_TRANS_EXC_CODE); |
735 | break; | |
736 | case PGM_ALEN_TRANSLATION: | |
737 | case PGM_ALE_SEQUENCE: | |
738 | case PGM_ASTE_INSTANCE: | |
739 | case PGM_ASTE_SEQUENCE: | |
740 | case PGM_ASTE_VALIDITY: | |
741 | case PGM_EXTENDED_AUTHORITY: | |
383d0b05 | 742 | rc = put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 743 | (u8 *)__LC_EXC_ACCESS_ID); |
a9a846fd | 744 | nullifying = true; |
8712836b DH |
745 | break; |
746 | case PGM_ASCE_TYPE: | |
747 | case PGM_PAGE_TRANSLATION: | |
748 | case PGM_REGION_FIRST_TRANS: | |
749 | case PGM_REGION_SECOND_TRANS: | |
750 | case PGM_REGION_THIRD_TRANS: | |
751 | case PGM_SEGMENT_TRANSLATION: | |
383d0b05 | 752 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 753 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 754 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 755 | (u8 *)__LC_EXC_ACCESS_ID); |
383d0b05 | 756 | rc |= put_guest_lc(vcpu, pgm_info.op_access_id, |
8712836b | 757 | (u8 *)__LC_OP_ACCESS_ID); |
a9a846fd | 758 | nullifying = true; |
8712836b DH |
759 | break; |
760 | case PGM_MONITOR: | |
383d0b05 | 761 | rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, |
a36c5393 | 762 | (u16 *)__LC_MON_CLASS_NR); |
383d0b05 | 763 | rc |= put_guest_lc(vcpu, pgm_info.mon_code, |
8712836b DH |
764 | (u64 *)__LC_MON_CODE); |
765 | break; | |
403c8648 | 766 | case PGM_VECTOR_PROCESSING: |
8712836b | 767 | case PGM_DATA: |
383d0b05 | 768 | rc = put_guest_lc(vcpu, pgm_info.data_exc_code, |
8712836b DH |
769 | (u32 *)__LC_DATA_EXC_CODE); |
770 | break; | |
771 | case PGM_PROTECTION: | |
383d0b05 | 772 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 773 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 774 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b DH |
775 | (u8 *)__LC_EXC_ACCESS_ID); |
776 | break; | |
a9a846fd TH |
777 | case PGM_STACK_FULL: |
778 | case PGM_STACK_EMPTY: | |
779 | case PGM_STACK_SPECIFICATION: | |
780 | case PGM_STACK_TYPE: | |
781 | case PGM_STACK_OPERATION: | |
782 | case PGM_TRACE_TABEL: | |
783 | case PGM_CRYPTO_OPERATION: | |
784 | nullifying = true; | |
785 | break; | |
8712836b DH |
786 | } |
787 | ||
383d0b05 JF |
788 | if (pgm_info.code & PGM_PER) { |
789 | rc |= put_guest_lc(vcpu, pgm_info.per_code, | |
8712836b | 790 | (u8 *) __LC_PER_CODE); |
383d0b05 | 791 | rc |= put_guest_lc(vcpu, pgm_info.per_atmid, |
8712836b | 792 | (u8 *)__LC_PER_ATMID); |
383d0b05 | 793 | rc |= put_guest_lc(vcpu, pgm_info.per_address, |
8712836b | 794 | (u64 *) __LC_PER_ADDRESS); |
383d0b05 | 795 | rc |= put_guest_lc(vcpu, pgm_info.per_access_id, |
8712836b DH |
796 | (u8 *) __LC_PER_ACCESS_ID); |
797 | } | |
798 | ||
eaa4f416 | 799 | if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND)) |
0e8bc06a | 800 | kvm_s390_rewind_psw(vcpu, ilen); |
a9a846fd | 801 | |
0e8bc06a DH |
802 | /* bit 1+2 of the target are the ilc, so we can directly use ilen */ |
803 | rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC); | |
2ba45968 DH |
804 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea, |
805 | (u64 *) __LC_LAST_BREAK); | |
383d0b05 | 806 | rc |= put_guest_lc(vcpu, pgm_info.code, |
8712836b DH |
807 | (u16 *)__LC_PGM_INT_CODE); |
808 | rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, | |
809 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
810 | rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, | |
811 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 812 | return rc ? -EFAULT : 0; |
0fb97abe JF |
813 | } |
814 | ||
6d3da241 | 815 | static int __must_check __deliver_service(struct kvm_vcpu *vcpu) |
0fb97abe | 816 | { |
6d3da241 JF |
817 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
818 | struct kvm_s390_ext_info ext; | |
819 | int rc = 0; | |
820 | ||
821 | spin_lock(&fi->lock); | |
822 | if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) { | |
823 | spin_unlock(&fi->lock); | |
824 | return 0; | |
825 | } | |
826 | ext = fi->srv_signal; | |
827 | memset(&fi->srv_signal, 0, sizeof(ext)); | |
828 | clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
829 | spin_unlock(&fi->lock); | |
0fb97abe | 830 | |
3f24ba15 | 831 | VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x", |
6d3da241 | 832 | ext.ext_params); |
0fb97abe | 833 | vcpu->stat.deliver_service_signal++; |
6d3da241 JF |
834 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, |
835 | ext.ext_params, 0); | |
0fb97abe JF |
836 | |
837 | rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 838 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
839 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
840 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
841 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
842 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
6d3da241 | 843 | rc |= put_guest_lc(vcpu, ext.ext_params, |
0fb97abe | 844 | (u32 *)__LC_EXT_PARAMS); |
6d3da241 | 845 | |
99e20009 | 846 | return rc ? -EFAULT : 0; |
0fb97abe JF |
847 | } |
848 | ||
6d3da241 | 849 | static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu) |
0fb97abe | 850 | { |
6d3da241 JF |
851 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
852 | struct kvm_s390_interrupt_info *inti; | |
853 | int rc = 0; | |
0fb97abe | 854 | |
6d3da241 JF |
855 | spin_lock(&fi->lock); |
856 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT], | |
857 | struct kvm_s390_interrupt_info, | |
858 | list); | |
859 | if (inti) { | |
6d3da241 JF |
860 | list_del(&inti->list); |
861 | fi->counters[FIRQ_CNTR_PFAULT] -= 1; | |
862 | } | |
863 | if (list_empty(&fi->lists[FIRQ_LIST_PFAULT])) | |
864 | clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
865 | spin_unlock(&fi->lock); | |
8712836b | 866 | |
6d3da241 | 867 | if (inti) { |
3f24ba15 CB |
868 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
869 | KVM_S390_INT_PFAULT_DONE, 0, | |
870 | inti->ext.ext_params2); | |
871 | VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx", | |
872 | inti->ext.ext_params2); | |
873 | ||
6d3da241 JF |
874 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, |
875 | (u16 *)__LC_EXT_INT_CODE); | |
876 | rc |= put_guest_lc(vcpu, PFAULT_DONE, | |
877 | (u16 *)__LC_EXT_CPU_ADDR); | |
878 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
879 | &vcpu->arch.sie_block->gpsw, | |
880 | sizeof(psw_t)); | |
881 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
882 | &vcpu->arch.sie_block->gpsw, | |
883 | sizeof(psw_t)); | |
884 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
885 | (u64 *)__LC_EXT_PARAMS2); | |
886 | kfree(inti); | |
887 | } | |
99e20009 | 888 | return rc ? -EFAULT : 0; |
0fb97abe JF |
889 | } |
890 | ||
6d3da241 | 891 | static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu) |
0fb97abe | 892 | { |
6d3da241 JF |
893 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
894 | struct kvm_s390_interrupt_info *inti; | |
895 | int rc = 0; | |
0fb97abe | 896 | |
6d3da241 JF |
897 | spin_lock(&fi->lock); |
898 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO], | |
899 | struct kvm_s390_interrupt_info, | |
900 | list); | |
901 | if (inti) { | |
902 | VCPU_EVENT(vcpu, 4, | |
3f24ba15 | 903 | "deliver: virtio parm: 0x%x,parm64: 0x%llx", |
6d3da241 | 904 | inti->ext.ext_params, inti->ext.ext_params2); |
ccc40c53 | 905 | vcpu->stat.deliver_virtio++; |
6d3da241 JF |
906 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
907 | inti->type, | |
908 | inti->ext.ext_params, | |
909 | inti->ext.ext_params2); | |
910 | list_del(&inti->list); | |
911 | fi->counters[FIRQ_CNTR_VIRTIO] -= 1; | |
912 | } | |
913 | if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO])) | |
914 | clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
915 | spin_unlock(&fi->lock); | |
0fb97abe | 916 | |
6d3da241 JF |
917 | if (inti) { |
918 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, | |
919 | (u16 *)__LC_EXT_INT_CODE); | |
920 | rc |= put_guest_lc(vcpu, VIRTIO_PARAM, | |
921 | (u16 *)__LC_EXT_CPU_ADDR); | |
922 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
923 | &vcpu->arch.sie_block->gpsw, | |
924 | sizeof(psw_t)); | |
925 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
926 | &vcpu->arch.sie_block->gpsw, | |
927 | sizeof(psw_t)); | |
928 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
929 | (u32 *)__LC_EXT_PARAMS); | |
930 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
931 | (u64 *)__LC_EXT_PARAMS2); | |
932 | kfree(inti); | |
933 | } | |
99e20009 | 934 | return rc ? -EFAULT : 0; |
0fb97abe JF |
935 | } |
936 | ||
d7c5cb01 MM |
937 | static int __do_deliver_io(struct kvm_vcpu *vcpu, struct kvm_s390_io_info *io) |
938 | { | |
939 | int rc; | |
940 | ||
941 | rc = put_guest_lc(vcpu, io->subchannel_id, (u16 *)__LC_SUBCHANNEL_ID); | |
942 | rc |= put_guest_lc(vcpu, io->subchannel_nr, (u16 *)__LC_SUBCHANNEL_NR); | |
943 | rc |= put_guest_lc(vcpu, io->io_int_parm, (u32 *)__LC_IO_INT_PARM); | |
944 | rc |= put_guest_lc(vcpu, io->io_int_word, (u32 *)__LC_IO_INT_WORD); | |
945 | rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, | |
946 | &vcpu->arch.sie_block->gpsw, | |
947 | sizeof(psw_t)); | |
948 | rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, | |
949 | &vcpu->arch.sie_block->gpsw, | |
950 | sizeof(psw_t)); | |
951 | return rc ? -EFAULT : 0; | |
952 | } | |
953 | ||
0fb97abe | 954 | static int __must_check __deliver_io(struct kvm_vcpu *vcpu, |
6d3da241 | 955 | unsigned long irq_type) |
0fb97abe | 956 | { |
6d3da241 JF |
957 | struct list_head *isc_list; |
958 | struct kvm_s390_float_interrupt *fi; | |
959 | struct kvm_s390_interrupt_info *inti = NULL; | |
d7c5cb01 MM |
960 | struct kvm_s390_io_info io; |
961 | u32 isc; | |
6d3da241 | 962 | int rc = 0; |
0fb97abe | 963 | |
6d3da241 | 964 | fi = &vcpu->kvm->arch.float_int; |
8712836b | 965 | |
6d3da241 | 966 | spin_lock(&fi->lock); |
d7c5cb01 MM |
967 | isc = irq_type_to_isc(irq_type); |
968 | isc_list = &fi->lists[isc]; | |
6d3da241 JF |
969 | inti = list_first_entry_or_null(isc_list, |
970 | struct kvm_s390_interrupt_info, | |
971 | list); | |
972 | if (inti) { | |
dcc98ea6 CB |
973 | if (inti->type & KVM_S390_INT_IO_AI_MASK) |
974 | VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)"); | |
975 | else | |
976 | VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x", | |
977 | inti->io.subchannel_id >> 8, | |
978 | inti->io.subchannel_id >> 1 & 0x3, | |
979 | inti->io.subchannel_nr); | |
980 | ||
ccc40c53 | 981 | vcpu->stat.deliver_io++; |
6d3da241 JF |
982 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
983 | inti->type, | |
984 | ((__u32)inti->io.subchannel_id << 16) | | |
985 | inti->io.subchannel_nr, | |
986 | ((__u64)inti->io.io_int_parm << 32) | | |
987 | inti->io.io_int_word); | |
988 | list_del(&inti->list); | |
989 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
990 | } | |
991 | if (list_empty(isc_list)) | |
992 | clear_bit(irq_type, &fi->pending_irqs); | |
993 | spin_unlock(&fi->lock); | |
994 | ||
995 | if (inti) { | |
d7c5cb01 | 996 | rc = __do_deliver_io(vcpu, &(inti->io)); |
6d3da241 | 997 | kfree(inti); |
d7c5cb01 | 998 | goto out; |
6d3da241 | 999 | } |
383d0b05 | 1000 | |
d7c5cb01 MM |
1001 | if (vcpu->kvm->arch.gisa && |
1002 | kvm_s390_gisa_tac_ipm_gisc(vcpu->kvm->arch.gisa, isc)) { | |
1003 | /* | |
1004 | * in case an adapter interrupt was not delivered | |
1005 | * in SIE context KVM will handle the delivery | |
1006 | */ | |
1007 | VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc); | |
1008 | memset(&io, 0, sizeof(io)); | |
2496c8e7 | 1009 | io.io_int_word = isc_to_int_word(isc); |
ccc40c53 | 1010 | vcpu->stat.deliver_io++; |
d7c5cb01 MM |
1011 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
1012 | KVM_S390_INT_IO(1, 0, 0, 0), | |
1013 | ((__u32)io.subchannel_id << 16) | | |
1014 | io.subchannel_nr, | |
1015 | ((__u64)io.io_int_parm << 32) | | |
1016 | io.io_int_word); | |
1017 | rc = __do_deliver_io(vcpu, &io); | |
1018 | } | |
1019 | out: | |
1020 | return rc; | |
383d0b05 JF |
1021 | } |
1022 | ||
ea5f4969 DH |
1023 | /* Check whether an external call is pending (deliverable or not) */ |
1024 | int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) | |
4953919f | 1025 | { |
ea5f4969 | 1026 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
4953919f | 1027 | |
37c5f6c8 | 1028 | if (!sclp.has_sigpif) |
ea5f4969 | 1029 | return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); |
4953919f | 1030 | |
a5bd7647 | 1031 | return sca_ext_call_pending(vcpu, NULL); |
4953919f DH |
1032 | } |
1033 | ||
9a022067 | 1034 | int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) |
ba5c1e9b | 1035 | { |
4d32ad6b DH |
1036 | if (deliverable_irqs(vcpu)) |
1037 | return 1; | |
ba5c1e9b | 1038 | |
4d32ad6b DH |
1039 | if (kvm_cpu_has_pending_timer(vcpu)) |
1040 | return 1; | |
ba5c1e9b | 1041 | |
ea5f4969 | 1042 | /* external call pending and deliverable */ |
4d32ad6b | 1043 | if (kvm_s390_ext_call_pending(vcpu) && |
ea5f4969 DH |
1044 | !psw_extint_disabled(vcpu) && |
1045 | (vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
4d32ad6b | 1046 | return 1; |
4953919f | 1047 | |
4d32ad6b DH |
1048 | if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) |
1049 | return 1; | |
1050 | return 0; | |
ba5c1e9b CO |
1051 | } |
1052 | ||
3d80840d MT |
1053 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
1054 | { | |
b4aec925 | 1055 | return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu); |
3d80840d MT |
1056 | } |
1057 | ||
b3c17f10 DH |
1058 | static u64 __calculate_sltime(struct kvm_vcpu *vcpu) |
1059 | { | |
5fe01793 DH |
1060 | const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm); |
1061 | const u64 ckc = vcpu->arch.sie_block->ckc; | |
1062 | u64 cputm, sltime = 0; | |
b3c17f10 DH |
1063 | |
1064 | if (ckc_interrupts_enabled(vcpu)) { | |
5fe01793 DH |
1065 | if (vcpu->arch.sie_block->gcr[0] & 0x0020000000000000ul) { |
1066 | if ((s64)now < (s64)ckc) | |
1067 | sltime = tod_to_ns((s64)ckc - (s64)now); | |
1068 | } else if (now < ckc) { | |
1069 | sltime = tod_to_ns(ckc - now); | |
1070 | } | |
1071 | /* already expired */ | |
1072 | if (!sltime) | |
b3c17f10 DH |
1073 | return 0; |
1074 | if (cpu_timer_interrupts_enabled(vcpu)) { | |
1075 | cputm = kvm_s390_get_cpu_timer(vcpu); | |
1076 | /* already expired? */ | |
1077 | if (cputm >> 63) | |
1078 | return 0; | |
1079 | return min(sltime, tod_to_ns(cputm)); | |
1080 | } | |
1081 | } else if (cpu_timer_interrupts_enabled(vcpu)) { | |
1082 | sltime = kvm_s390_get_cpu_timer(vcpu); | |
1083 | /* already expired? */ | |
1084 | if (sltime >> 63) | |
1085 | return 0; | |
1086 | } | |
1087 | return sltime; | |
1088 | } | |
1089 | ||
ba5c1e9b CO |
1090 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
1091 | { | |
b3c17f10 | 1092 | u64 sltime; |
ba5c1e9b CO |
1093 | |
1094 | vcpu->stat.exit_wait_state++; | |
ba5c1e9b | 1095 | |
0759d068 | 1096 | /* fast path */ |
118b862b | 1097 | if (kvm_arch_vcpu_runnable(vcpu)) |
0759d068 | 1098 | return 0; |
e52b2af5 | 1099 | |
ba5c1e9b CO |
1100 | if (psw_interrupts_disabled(vcpu)) { |
1101 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
b8e660b8 | 1102 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
1103 | } |
1104 | ||
b3c17f10 DH |
1105 | if (!ckc_interrupts_enabled(vcpu) && |
1106 | !cpu_timer_interrupts_enabled(vcpu)) { | |
ba5c1e9b | 1107 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
bda343ef | 1108 | __set_cpu_idle(vcpu); |
ba5c1e9b CO |
1109 | goto no_timer; |
1110 | } | |
1111 | ||
b3c17f10 DH |
1112 | sltime = __calculate_sltime(vcpu); |
1113 | if (!sltime) | |
bda343ef DH |
1114 | return 0; |
1115 | ||
1116 | __set_cpu_idle(vcpu); | |
8b0e1953 | 1117 | hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL); |
b3c17f10 | 1118 | VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime); |
ba5c1e9b | 1119 | no_timer: |
800c1065 | 1120 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
0759d068 | 1121 | kvm_vcpu_block(vcpu); |
ba5c1e9b | 1122 | __unset_cpu_idle(vcpu); |
800c1065 TH |
1123 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
1124 | ||
2d00f759 | 1125 | hrtimer_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
1126 | return 0; |
1127 | } | |
1128 | ||
0e9c85a5 DH |
1129 | void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
1130 | { | |
3491caf2 CB |
1131 | /* |
1132 | * We cannot move this into the if, as the CPU might be already | |
1133 | * in kvm_vcpu_block without having the waitqueue set (polling) | |
1134 | */ | |
1135 | vcpu->valid_wakeup = true; | |
72e1ad42 CB |
1136 | /* |
1137 | * This is mostly to document, that the read in swait_active could | |
1138 | * be moved before other stores, leading to subtle races. | |
1139 | * All current users do not store or use an atomic like update | |
1140 | */ | |
1141 | smp_mb__after_atomic(); | |
8577370f | 1142 | if (swait_active(&vcpu->wq)) { |
0e9c85a5 DH |
1143 | /* |
1144 | * The vcpu gave up the cpu voluntarily, mark it as a good | |
1145 | * yield-candidate. | |
1146 | */ | |
1147 | vcpu->preempted = true; | |
8577370f | 1148 | swake_up(&vcpu->wq); |
ce2e4f0b | 1149 | vcpu->stat.halt_wakeup++; |
0e9c85a5 | 1150 | } |
adbf1698 DH |
1151 | /* |
1152 | * The VCPU might not be sleeping but is executing the VSIE. Let's | |
1153 | * kick it, so it leaves the SIE to process the request. | |
1154 | */ | |
1155 | kvm_s390_vsie_kick(vcpu); | |
0e9c85a5 DH |
1156 | } |
1157 | ||
ca872302 CB |
1158 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
1159 | { | |
1160 | struct kvm_vcpu *vcpu; | |
b3c17f10 | 1161 | u64 sltime; |
ca872302 CB |
1162 | |
1163 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
b3c17f10 | 1164 | sltime = __calculate_sltime(vcpu); |
ca872302 | 1165 | |
2d00f759 DH |
1166 | /* |
1167 | * If the monotonic clock runs faster than the tod clock we might be | |
1168 | * woken up too early and have to go back to sleep to avoid deadlocks. | |
1169 | */ | |
b3c17f10 | 1170 | if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime))) |
2d00f759 DH |
1171 | return HRTIMER_RESTART; |
1172 | kvm_s390_vcpu_wakeup(vcpu); | |
ca872302 CB |
1173 | return HRTIMER_NORESTART; |
1174 | } | |
ba5c1e9b | 1175 | |
2ed10cc1 JF |
1176 | void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
1177 | { | |
1178 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2ed10cc1 | 1179 | |
4ae3c081 | 1180 | spin_lock(&li->lock); |
383d0b05 JF |
1181 | li->pending_irqs = 0; |
1182 | bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
1183 | memset(&li->irq, 0, sizeof(li->irq)); | |
4ae3c081 | 1184 | spin_unlock(&li->lock); |
4953919f | 1185 | |
a5bd7647 | 1186 | sca_clear_ext_call(vcpu); |
2ed10cc1 JF |
1187 | } |
1188 | ||
614aeab4 | 1189 | int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
ba5c1e9b | 1190 | { |
180c12fb | 1191 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
79395031 | 1192 | int rc = 0; |
383d0b05 | 1193 | unsigned long irq_type; |
6d3da241 | 1194 | unsigned long irqs; |
ba5c1e9b CO |
1195 | |
1196 | __reset_intercept_indicators(vcpu); | |
ba5c1e9b | 1197 | |
383d0b05 JF |
1198 | /* pending ckc conditions might have been invalidated */ |
1199 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
b4aec925 | 1200 | if (ckc_irq_pending(vcpu)) |
383d0b05 JF |
1201 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
1202 | ||
b4aec925 DH |
1203 | /* pending cpu timer conditions might have been invalidated */ |
1204 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
1205 | if (cpu_timer_irq_pending(vcpu)) | |
1206 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
1207 | ||
ffeca0ae | 1208 | while ((irqs = deliverable_irqs(vcpu)) && !rc) { |
c7901a6e MM |
1209 | /* bits are in the reverse order of interrupt priority */ |
1210 | irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT); | |
baabee67 DH |
1211 | switch (irq_type) { |
1212 | case IRQ_PEND_IO_ISC_0: | |
1213 | case IRQ_PEND_IO_ISC_1: | |
1214 | case IRQ_PEND_IO_ISC_2: | |
1215 | case IRQ_PEND_IO_ISC_3: | |
1216 | case IRQ_PEND_IO_ISC_4: | |
1217 | case IRQ_PEND_IO_ISC_5: | |
1218 | case IRQ_PEND_IO_ISC_6: | |
1219 | case IRQ_PEND_IO_ISC_7: | |
6d3da241 | 1220 | rc = __deliver_io(vcpu, irq_type); |
baabee67 DH |
1221 | break; |
1222 | case IRQ_PEND_MCHK_EX: | |
1223 | case IRQ_PEND_MCHK_REP: | |
1224 | rc = __deliver_machine_check(vcpu); | |
1225 | break; | |
1226 | case IRQ_PEND_PROG: | |
1227 | rc = __deliver_prog(vcpu); | |
1228 | break; | |
1229 | case IRQ_PEND_EXT_EMERGENCY: | |
1230 | rc = __deliver_emergency_signal(vcpu); | |
1231 | break; | |
1232 | case IRQ_PEND_EXT_EXTERNAL: | |
1233 | rc = __deliver_external_call(vcpu); | |
1234 | break; | |
1235 | case IRQ_PEND_EXT_CLOCK_COMP: | |
1236 | rc = __deliver_ckc(vcpu); | |
1237 | break; | |
1238 | case IRQ_PEND_EXT_CPU_TIMER: | |
1239 | rc = __deliver_cpu_timer(vcpu); | |
1240 | break; | |
1241 | case IRQ_PEND_RESTART: | |
1242 | rc = __deliver_restart(vcpu); | |
1243 | break; | |
1244 | case IRQ_PEND_SET_PREFIX: | |
1245 | rc = __deliver_set_prefix(vcpu); | |
1246 | break; | |
1247 | case IRQ_PEND_PFAULT_INIT: | |
1248 | rc = __deliver_pfault_init(vcpu); | |
1249 | break; | |
1250 | case IRQ_PEND_EXT_SERVICE: | |
1251 | rc = __deliver_service(vcpu); | |
1252 | break; | |
1253 | case IRQ_PEND_PFAULT_DONE: | |
1254 | rc = __deliver_pfault_done(vcpu); | |
1255 | break; | |
1256 | case IRQ_PEND_VIRTIO: | |
1257 | rc = __deliver_virtio(vcpu); | |
1258 | break; | |
1259 | default: | |
1260 | WARN_ONCE(1, "Unknown pending irq type %ld", irq_type); | |
1261 | clear_bit(irq_type, &li->pending_irqs); | |
383d0b05 | 1262 | } |
ffeca0ae | 1263 | } |
383d0b05 | 1264 | |
6d3da241 | 1265 | set_intercept_indicators(vcpu); |
79395031 JF |
1266 | |
1267 | return rc; | |
ba5c1e9b CO |
1268 | } |
1269 | ||
383d0b05 | 1270 | static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1271 | { |
1272 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1273 | ||
ccc40c53 | 1274 | vcpu->stat.inject_program++; |
ed2afcfa DH |
1275 | VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code); |
1276 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
1277 | irq->u.pgm.code, 0); | |
1278 | ||
634790b8 DH |
1279 | if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) { |
1280 | /* auto detection if no valid ILC was given */ | |
1281 | irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK; | |
1282 | irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu); | |
1283 | irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID; | |
1284 | } | |
1285 | ||
238293b1 DH |
1286 | if (irq->u.pgm.code == PGM_PER) { |
1287 | li->irq.pgm.code |= PGM_PER; | |
634790b8 | 1288 | li->irq.pgm.flags = irq->u.pgm.flags; |
238293b1 DH |
1289 | /* only modify PER related information */ |
1290 | li->irq.pgm.per_address = irq->u.pgm.per_address; | |
1291 | li->irq.pgm.per_code = irq->u.pgm.per_code; | |
1292 | li->irq.pgm.per_atmid = irq->u.pgm.per_atmid; | |
1293 | li->irq.pgm.per_access_id = irq->u.pgm.per_access_id; | |
1294 | } else if (!(irq->u.pgm.code & PGM_PER)) { | |
1295 | li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) | | |
1296 | irq->u.pgm.code; | |
634790b8 | 1297 | li->irq.pgm.flags = irq->u.pgm.flags; |
238293b1 DH |
1298 | /* only modify non-PER information */ |
1299 | li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code; | |
1300 | li->irq.pgm.mon_code = irq->u.pgm.mon_code; | |
1301 | li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code; | |
1302 | li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr; | |
1303 | li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id; | |
1304 | li->irq.pgm.op_access_id = irq->u.pgm.op_access_id; | |
1305 | } else { | |
1306 | li->irq.pgm = irq->u.pgm; | |
1307 | } | |
9185124e | 1308 | set_bit(IRQ_PEND_PROG, &li->pending_irqs); |
0146a7b0 JF |
1309 | return 0; |
1310 | } | |
1311 | ||
383d0b05 | 1312 | static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1313 | { |
1314 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1315 | ||
ccc40c53 | 1316 | vcpu->stat.inject_pfault_init++; |
3f24ba15 CB |
1317 | VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx", |
1318 | irq->u.ext.ext_params2); | |
383d0b05 JF |
1319 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, |
1320 | irq->u.ext.ext_params, | |
ed2afcfa | 1321 | irq->u.ext.ext_params2); |
383d0b05 JF |
1322 | |
1323 | li->irq.ext = irq->u.ext; | |
1324 | set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
2018224d | 1325 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
0146a7b0 JF |
1326 | return 0; |
1327 | } | |
1328 | ||
0675d92d | 1329 | static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1330 | { |
1331 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1332 | struct kvm_s390_extcall_info *extcall = &li->irq.extcall; |
ea5f4969 | 1333 | uint16_t src_id = irq->u.extcall.code; |
0146a7b0 | 1334 | |
ccc40c53 | 1335 | vcpu->stat.inject_external_call++; |
3f24ba15 | 1336 | VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u", |
ea5f4969 | 1337 | src_id); |
383d0b05 | 1338 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, |
ed2afcfa | 1339 | src_id, 0); |
ea5f4969 DH |
1340 | |
1341 | /* sending vcpu invalid */ | |
152e9f65 | 1342 | if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL) |
ea5f4969 DH |
1343 | return -EINVAL; |
1344 | ||
37c5f6c8 | 1345 | if (sclp.has_sigpif) |
a5bd7647 | 1346 | return sca_inject_ext_call(vcpu, src_id); |
383d0b05 | 1347 | |
b938eace | 1348 | if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) |
ea5f4969 | 1349 | return -EBUSY; |
383d0b05 | 1350 | *extcall = irq->u.extcall; |
2018224d | 1351 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
0146a7b0 JF |
1352 | return 0; |
1353 | } | |
1354 | ||
383d0b05 | 1355 | static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1356 | { |
1357 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1358 | struct kvm_s390_prefix_info *prefix = &li->irq.prefix; |
0146a7b0 | 1359 | |
ccc40c53 | 1360 | vcpu->stat.inject_set_prefix++; |
ed2afcfa | 1361 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x", |
556cc0da | 1362 | irq->u.prefix.address); |
383d0b05 | 1363 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, |
ed2afcfa | 1364 | irq->u.prefix.address, 0); |
383d0b05 | 1365 | |
a3a9c59a DH |
1366 | if (!is_vcpu_stopped(vcpu)) |
1367 | return -EBUSY; | |
1368 | ||
383d0b05 JF |
1369 | *prefix = irq->u.prefix; |
1370 | set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
0146a7b0 JF |
1371 | return 0; |
1372 | } | |
1373 | ||
6cddd432 | 1374 | #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) |
383d0b05 | 1375 | static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1376 | { |
1377 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2822545f | 1378 | struct kvm_s390_stop_info *stop = &li->irq.stop; |
6cddd432 | 1379 | int rc = 0; |
0146a7b0 | 1380 | |
ccc40c53 | 1381 | vcpu->stat.inject_stop_signal++; |
ed2afcfa | 1382 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0); |
383d0b05 | 1383 | |
2822545f DH |
1384 | if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) |
1385 | return -EINVAL; | |
1386 | ||
6cddd432 DH |
1387 | if (is_vcpu_stopped(vcpu)) { |
1388 | if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) | |
1389 | rc = kvm_s390_store_status_unloaded(vcpu, | |
1390 | KVM_S390_STORE_STATUS_NOADDR); | |
1391 | return rc; | |
1392 | } | |
1393 | ||
1394 | if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) | |
1395 | return -EBUSY; | |
2822545f | 1396 | stop->flags = irq->u.stop.flags; |
2018224d | 1397 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT); |
0146a7b0 JF |
1398 | return 0; |
1399 | } | |
1400 | ||
1401 | static int __inject_sigp_restart(struct kvm_vcpu *vcpu, | |
383d0b05 | 1402 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1403 | { |
1404 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1405 | ||
ccc40c53 | 1406 | vcpu->stat.inject_restart++; |
3f24ba15 | 1407 | VCPU_EVENT(vcpu, 3, "%s", "inject: restart int"); |
ed2afcfa | 1408 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); |
383d0b05 JF |
1409 | |
1410 | set_bit(IRQ_PEND_RESTART, &li->pending_irqs); | |
0146a7b0 JF |
1411 | return 0; |
1412 | } | |
1413 | ||
1414 | static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, | |
383d0b05 | 1415 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1416 | { |
1417 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1418 | ||
ccc40c53 | 1419 | vcpu->stat.inject_emergency_signal++; |
3f24ba15 | 1420 | VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u", |
383d0b05 JF |
1421 | irq->u.emerg.code); |
1422 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, | |
ed2afcfa | 1423 | irq->u.emerg.code, 0); |
383d0b05 | 1424 | |
b85de33a DH |
1425 | /* sending vcpu invalid */ |
1426 | if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL) | |
1427 | return -EINVAL; | |
1428 | ||
49538d12 | 1429 | set_bit(irq->u.emerg.code, li->sigp_emerg_pending); |
383d0b05 | 1430 | set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
2018224d | 1431 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
0146a7b0 JF |
1432 | return 0; |
1433 | } | |
1434 | ||
383d0b05 | 1435 | static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1436 | { |
1437 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1438 | struct kvm_s390_mchk_info *mchk = &li->irq.mchk; |
0146a7b0 | 1439 | |
ccc40c53 | 1440 | vcpu->stat.inject_mchk++; |
3f24ba15 | 1441 | VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx", |
556cc0da | 1442 | irq->u.mchk.mcic); |
383d0b05 | 1443 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, |
ed2afcfa | 1444 | irq->u.mchk.mcic); |
383d0b05 JF |
1445 | |
1446 | /* | |
fc2020cf JF |
1447 | * Because repressible machine checks can be indicated along with |
1448 | * exigent machine checks (PoP, Chapter 11, Interruption action) | |
1449 | * we need to combine cr14, mcic and external damage code. | |
1450 | * Failing storage address and the logout area should not be or'ed | |
1451 | * together, we just indicate the last occurrence of the corresponding | |
1452 | * machine check | |
383d0b05 | 1453 | */ |
fc2020cf | 1454 | mchk->cr14 |= irq->u.mchk.cr14; |
383d0b05 | 1455 | mchk->mcic |= irq->u.mchk.mcic; |
fc2020cf JF |
1456 | mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; |
1457 | mchk->failing_storage_address = irq->u.mchk.failing_storage_address; | |
1458 | memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, | |
1459 | sizeof(mchk->fixed_logout)); | |
383d0b05 JF |
1460 | if (mchk->mcic & MCHK_EX_MASK) |
1461 | set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
1462 | else if (mchk->mcic & MCHK_REP_MASK) | |
1463 | set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
0146a7b0 JF |
1464 | return 0; |
1465 | } | |
1466 | ||
383d0b05 | 1467 | static int __inject_ckc(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1468 | { |
1469 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1470 | ||
ccc40c53 | 1471 | vcpu->stat.inject_ckc++; |
3f24ba15 | 1472 | VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external"); |
383d0b05 | 1473 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, |
ed2afcfa | 1474 | 0, 0); |
383d0b05 JF |
1475 | |
1476 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
2018224d | 1477 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
0146a7b0 JF |
1478 | return 0; |
1479 | } | |
1480 | ||
383d0b05 | 1481 | static int __inject_cpu_timer(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1482 | { |
1483 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1484 | ||
ccc40c53 | 1485 | vcpu->stat.inject_cputm++; |
3f24ba15 | 1486 | VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external"); |
383d0b05 | 1487 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, |
ed2afcfa | 1488 | 0, 0); |
383d0b05 JF |
1489 | |
1490 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
2018224d | 1491 | kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
ba5c1e9b CO |
1492 | return 0; |
1493 | } | |
1494 | ||
6d3da241 JF |
1495 | static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm, |
1496 | int isc, u32 schid) | |
1497 | { | |
1498 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1499 | struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1500 | struct kvm_s390_interrupt_info *iter; | |
1501 | u16 id = (schid & 0xffff0000U) >> 16; | |
1502 | u16 nr = schid & 0x0000ffffU; | |
1503 | ||
1504 | spin_lock(&fi->lock); | |
1505 | list_for_each_entry(iter, isc_list, list) { | |
1506 | if (schid && (id != iter->io.subchannel_id || | |
1507 | nr != iter->io.subchannel_nr)) | |
1508 | continue; | |
1509 | /* found an appropriate entry */ | |
1510 | list_del_init(&iter->list); | |
1511 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
1512 | if (list_empty(isc_list)) | |
ee739f4b | 1513 | clear_bit(isc_to_irq_type(isc), &fi->pending_irqs); |
6d3da241 JF |
1514 | spin_unlock(&fi->lock); |
1515 | return iter; | |
1516 | } | |
1517 | spin_unlock(&fi->lock); | |
1518 | return NULL; | |
1519 | } | |
383d0b05 | 1520 | |
4b35f65e MM |
1521 | static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm, |
1522 | u64 isc_mask, u32 schid) | |
1523 | { | |
1524 | struct kvm_s390_interrupt_info *inti = NULL; | |
1525 | int isc; | |
1526 | ||
1527 | for (isc = 0; isc <= MAX_ISC && !inti; isc++) { | |
1528 | if (isc_mask & isc_to_isc_bits(isc)) | |
1529 | inti = get_io_int(kvm, isc, schid); | |
1530 | } | |
1531 | return inti; | |
1532 | } | |
1533 | ||
1534 | static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid) | |
1535 | { | |
1536 | unsigned long active_mask; | |
1537 | int isc; | |
1538 | ||
1539 | if (schid) | |
1540 | goto out; | |
1541 | if (!kvm->arch.gisa) | |
1542 | goto out; | |
1543 | ||
1544 | active_mask = (isc_mask & kvm_s390_gisa_get_ipm(kvm->arch.gisa) << 24) << 32; | |
1545 | while (active_mask) { | |
1546 | isc = __fls(active_mask) ^ (BITS_PER_LONG - 1); | |
1547 | if (kvm_s390_gisa_tac_ipm_gisc(kvm->arch.gisa, isc)) | |
1548 | return isc; | |
1549 | clear_bit_inv(isc, &active_mask); | |
1550 | } | |
1551 | out: | |
1552 | return -EINVAL; | |
1553 | } | |
1554 | ||
6d3da241 JF |
1555 | /* |
1556 | * Dequeue and return an I/O interrupt matching any of the interruption | |
1557 | * subclasses as designated by the isc mask in cr6 and the schid (if != 0). | |
4b35f65e MM |
1558 | * Take into account the interrupts pending in the interrupt list and in GISA. |
1559 | * | |
1560 | * Note that for a guest that does not enable I/O interrupts | |
1561 | * but relies on TPI, a flood of classic interrupts may starve | |
1562 | * out adapter interrupts on the same isc. Linux does not do | |
1563 | * that, and it is possible to work around the issue by configuring | |
1564 | * different iscs for classic and adapter interrupts in the guest, | |
1565 | * but we may want to revisit this in the future. | |
6d3da241 | 1566 | */ |
fa6b7fe9 | 1567 | struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
6d3da241 JF |
1568 | u64 isc_mask, u32 schid) |
1569 | { | |
4b35f65e | 1570 | struct kvm_s390_interrupt_info *inti, *tmp_inti; |
6d3da241 JF |
1571 | int isc; |
1572 | ||
4b35f65e MM |
1573 | inti = get_top_io_int(kvm, isc_mask, schid); |
1574 | ||
1575 | isc = get_top_gisa_isc(kvm, isc_mask, schid); | |
1576 | if (isc < 0) | |
1577 | /* no AI in GISA */ | |
1578 | goto out; | |
1579 | ||
1580 | if (!inti) | |
1581 | /* AI in GISA but no classical IO int */ | |
1582 | goto gisa_out; | |
1583 | ||
1584 | /* both types of interrupts present */ | |
1585 | if (int_word_to_isc(inti->io.io_int_word) <= isc) { | |
1586 | /* classical IO int with higher priority */ | |
1587 | kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc); | |
1588 | goto out; | |
6d3da241 | 1589 | } |
4b35f65e MM |
1590 | gisa_out: |
1591 | tmp_inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
1592 | if (tmp_inti) { | |
1593 | tmp_inti->type = KVM_S390_INT_IO(1, 0, 0, 0); | |
1594 | tmp_inti->io.io_int_word = isc_to_int_word(isc); | |
1595 | if (inti) | |
1596 | kvm_s390_reinject_io_int(kvm, inti); | |
1597 | inti = tmp_inti; | |
1598 | } else | |
1599 | kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc); | |
1600 | out: | |
6d3da241 JF |
1601 | return inti; |
1602 | } | |
1603 | ||
1604 | #define SCCB_MASK 0xFFFFFFF8 | |
1605 | #define SCCB_EVENT_PENDING 0x3 | |
1606 | ||
1607 | static int __inject_service(struct kvm *kvm, | |
1608 | struct kvm_s390_interrupt_info *inti) | |
1609 | { | |
1610 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1611 | ||
ccc40c53 | 1612 | kvm->stat.inject_service_signal++; |
6d3da241 JF |
1613 | spin_lock(&fi->lock); |
1614 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING; | |
1615 | /* | |
1616 | * Early versions of the QEMU s390 bios will inject several | |
1617 | * service interrupts after another without handling a | |
1618 | * condition code indicating busy. | |
1619 | * We will silently ignore those superfluous sccb values. | |
1620 | * A future version of QEMU will take care of serialization | |
1621 | * of servc requests | |
1622 | */ | |
1623 | if (fi->srv_signal.ext_params & SCCB_MASK) | |
1624 | goto out; | |
1625 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK; | |
1626 | set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
1627 | out: | |
1628 | spin_unlock(&fi->lock); | |
1629 | kfree(inti); | |
1630 | return 0; | |
1631 | } | |
1632 | ||
1633 | static int __inject_virtio(struct kvm *kvm, | |
1634 | struct kvm_s390_interrupt_info *inti) | |
1635 | { | |
1636 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1637 | ||
ccc40c53 | 1638 | kvm->stat.inject_virtio++; |
6d3da241 JF |
1639 | spin_lock(&fi->lock); |
1640 | if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) { | |
1641 | spin_unlock(&fi->lock); | |
1642 | return -EBUSY; | |
1643 | } | |
1644 | fi->counters[FIRQ_CNTR_VIRTIO] += 1; | |
1645 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]); | |
1646 | set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
1647 | spin_unlock(&fi->lock); | |
1648 | return 0; | |
1649 | } | |
1650 | ||
1651 | static int __inject_pfault_done(struct kvm *kvm, | |
1652 | struct kvm_s390_interrupt_info *inti) | |
1653 | { | |
1654 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1655 | ||
ccc40c53 | 1656 | kvm->stat.inject_pfault_done++; |
6d3da241 JF |
1657 | spin_lock(&fi->lock); |
1658 | if (fi->counters[FIRQ_CNTR_PFAULT] >= | |
1659 | (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) { | |
1660 | spin_unlock(&fi->lock); | |
1661 | return -EBUSY; | |
1662 | } | |
1663 | fi->counters[FIRQ_CNTR_PFAULT] += 1; | |
1664 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]); | |
1665 | set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
1666 | spin_unlock(&fi->lock); | |
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | #define CR_PENDING_SUBCLASS 28 | |
1671 | static int __inject_float_mchk(struct kvm *kvm, | |
1672 | struct kvm_s390_interrupt_info *inti) | |
1673 | { | |
1674 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1675 | ||
ccc40c53 | 1676 | kvm->stat.inject_float_mchk++; |
6d3da241 JF |
1677 | spin_lock(&fi->lock); |
1678 | fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS); | |
1679 | fi->mchk.mcic |= inti->mchk.mcic; | |
1680 | set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs); | |
1681 | spin_unlock(&fi->lock); | |
1682 | kfree(inti); | |
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
fa6b7fe9 CH |
1687 | { |
1688 | struct kvm_s390_float_interrupt *fi; | |
6d3da241 JF |
1689 | struct list_head *list; |
1690 | int isc; | |
fa6b7fe9 | 1691 | |
ccc40c53 | 1692 | kvm->stat.inject_io++; |
d7c5cb01 MM |
1693 | isc = int_word_to_isc(inti->io.io_int_word); |
1694 | ||
1695 | if (kvm->arch.gisa && inti->type & KVM_S390_INT_IO_AI_MASK) { | |
1696 | VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc); | |
1697 | kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc); | |
1698 | kfree(inti); | |
1699 | return 0; | |
1700 | } | |
1701 | ||
fa6b7fe9 CH |
1702 | fi = &kvm->arch.float_int; |
1703 | spin_lock(&fi->lock); | |
6d3da241 JF |
1704 | if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) { |
1705 | spin_unlock(&fi->lock); | |
1706 | return -EBUSY; | |
a91b8ebe | 1707 | } |
6d3da241 JF |
1708 | fi->counters[FIRQ_CNTR_IO] += 1; |
1709 | ||
dcc98ea6 CB |
1710 | if (inti->type & KVM_S390_INT_IO_AI_MASK) |
1711 | VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)"); | |
1712 | else | |
1713 | VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x", | |
1714 | inti->io.subchannel_id >> 8, | |
1715 | inti->io.subchannel_id >> 1 & 0x3, | |
1716 | inti->io.subchannel_nr); | |
6d3da241 JF |
1717 | list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; |
1718 | list_add_tail(&inti->list, list); | |
ee739f4b | 1719 | set_bit(isc_to_irq_type(isc), &fi->pending_irqs); |
fa6b7fe9 | 1720 | spin_unlock(&fi->lock); |
6d3da241 | 1721 | return 0; |
fa6b7fe9 | 1722 | } |
ba5c1e9b | 1723 | |
96e0ed23 DH |
1724 | /* |
1725 | * Find a destination VCPU for a floating irq and kick it. | |
1726 | */ | |
1727 | static void __floating_irq_kick(struct kvm *kvm, u64 type) | |
ba5c1e9b | 1728 | { |
96e0ed23 | 1729 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
96e0ed23 DH |
1730 | struct kvm_vcpu *dst_vcpu; |
1731 | int sigcpu, online_vcpus, nr_tries = 0; | |
1732 | ||
1733 | online_vcpus = atomic_read(&kvm->online_vcpus); | |
1734 | if (!online_vcpus) | |
1735 | return; | |
1736 | ||
1737 | /* find idle VCPUs first, then round robin */ | |
1738 | sigcpu = find_first_bit(fi->idle_mask, online_vcpus); | |
1739 | if (sigcpu == online_vcpus) { | |
1740 | do { | |
1741 | sigcpu = fi->next_rr_cpu; | |
1742 | fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus; | |
1743 | /* avoid endless loops if all vcpus are stopped */ | |
1744 | if (nr_tries++ >= online_vcpus) | |
1745 | return; | |
1746 | } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu))); | |
1747 | } | |
1748 | dst_vcpu = kvm_get_vcpu(kvm, sigcpu); | |
1749 | ||
1750 | /* make the VCPU drop out of the SIE, or wake it up if sleeping */ | |
96e0ed23 DH |
1751 | switch (type) { |
1752 | case KVM_S390_MCHK: | |
2018224d | 1753 | kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT); |
96e0ed23 DH |
1754 | break; |
1755 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
a9810327 CB |
1756 | if (!(type & KVM_S390_INT_IO_AI_MASK && kvm->arch.gisa)) |
1757 | kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT); | |
96e0ed23 DH |
1758 | break; |
1759 | default: | |
2018224d | 1760 | kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT); |
96e0ed23 DH |
1761 | break; |
1762 | } | |
96e0ed23 DH |
1763 | kvm_s390_vcpu_wakeup(dst_vcpu); |
1764 | } | |
1765 | ||
1766 | static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
1767 | { | |
6d3da241 JF |
1768 | u64 type = READ_ONCE(inti->type); |
1769 | int rc; | |
ba5c1e9b | 1770 | |
6d3da241 JF |
1771 | switch (type) { |
1772 | case KVM_S390_MCHK: | |
1773 | rc = __inject_float_mchk(kvm, inti); | |
1774 | break; | |
1775 | case KVM_S390_INT_VIRTIO: | |
1776 | rc = __inject_virtio(kvm, inti); | |
1777 | break; | |
1778 | case KVM_S390_INT_SERVICE: | |
1779 | rc = __inject_service(kvm, inti); | |
1780 | break; | |
1781 | case KVM_S390_INT_PFAULT_DONE: | |
1782 | rc = __inject_pfault_done(kvm, inti); | |
1783 | break; | |
1784 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1785 | rc = __inject_io(kvm, inti); | |
1786 | break; | |
1787 | default: | |
a91b8ebe | 1788 | rc = -EINVAL; |
c05c4186 | 1789 | } |
6d3da241 JF |
1790 | if (rc) |
1791 | return rc; | |
1792 | ||
96e0ed23 | 1793 | __floating_irq_kick(kvm, type); |
6d3da241 | 1794 | return 0; |
c05c4186 JF |
1795 | } |
1796 | ||
1797 | int kvm_s390_inject_vm(struct kvm *kvm, | |
1798 | struct kvm_s390_interrupt *s390int) | |
1799 | { | |
1800 | struct kvm_s390_interrupt_info *inti; | |
428d53be | 1801 | int rc; |
c05c4186 | 1802 | |
ba5c1e9b CO |
1803 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
1804 | if (!inti) | |
1805 | return -ENOMEM; | |
1806 | ||
c05c4186 JF |
1807 | inti->type = s390int->type; |
1808 | switch (inti->type) { | |
ba5c1e9b | 1809 | case KVM_S390_INT_VIRTIO: |
33e19115 | 1810 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b | 1811 | s390int->parm, s390int->parm64); |
ba5c1e9b CO |
1812 | inti->ext.ext_params = s390int->parm; |
1813 | inti->ext.ext_params2 = s390int->parm64; | |
1814 | break; | |
1815 | case KVM_S390_INT_SERVICE: | |
3f24ba15 | 1816 | VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm); |
ba5c1e9b CO |
1817 | inti->ext.ext_params = s390int->parm; |
1818 | break; | |
3c038e6b | 1819 | case KVM_S390_INT_PFAULT_DONE: |
3c038e6b DD |
1820 | inti->ext.ext_params2 = s390int->parm64; |
1821 | break; | |
48a3e950 | 1822 | case KVM_S390_MCHK: |
3f24ba15 | 1823 | VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx", |
48a3e950 | 1824 | s390int->parm64); |
48a3e950 CH |
1825 | inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
1826 | inti->mchk.mcic = s390int->parm64; | |
1827 | break; | |
d8346b7d | 1828 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
d8346b7d CH |
1829 | inti->io.subchannel_id = s390int->parm >> 16; |
1830 | inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; | |
1831 | inti->io.io_int_parm = s390int->parm64 >> 32; | |
1832 | inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; | |
1833 | break; | |
ba5c1e9b CO |
1834 | default: |
1835 | kfree(inti); | |
1836 | return -EINVAL; | |
1837 | } | |
ade38c31 CH |
1838 | trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
1839 | 2); | |
ba5c1e9b | 1840 | |
428d53be DH |
1841 | rc = __inject_vm(kvm, inti); |
1842 | if (rc) | |
1843 | kfree(inti); | |
1844 | return rc; | |
ba5c1e9b CO |
1845 | } |
1846 | ||
15462e37 | 1847 | int kvm_s390_reinject_io_int(struct kvm *kvm, |
2f32d4ea CH |
1848 | struct kvm_s390_interrupt_info *inti) |
1849 | { | |
15462e37 | 1850 | return __inject_vm(kvm, inti); |
2f32d4ea CH |
1851 | } |
1852 | ||
383d0b05 JF |
1853 | int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
1854 | struct kvm_s390_irq *irq) | |
1855 | { | |
1856 | irq->type = s390int->type; | |
1857 | switch (irq->type) { | |
1858 | case KVM_S390_PROGRAM_INT: | |
1859 | if (s390int->parm & 0xffff0000) | |
1860 | return -EINVAL; | |
1861 | irq->u.pgm.code = s390int->parm; | |
1862 | break; | |
1863 | case KVM_S390_SIGP_SET_PREFIX: | |
1864 | irq->u.prefix.address = s390int->parm; | |
1865 | break; | |
2822545f DH |
1866 | case KVM_S390_SIGP_STOP: |
1867 | irq->u.stop.flags = s390int->parm; | |
1868 | break; | |
383d0b05 | 1869 | case KVM_S390_INT_EXTERNAL_CALL: |
94d1f564 | 1870 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1871 | return -EINVAL; |
1872 | irq->u.extcall.code = s390int->parm; | |
1873 | break; | |
1874 | case KVM_S390_INT_EMERGENCY: | |
94d1f564 | 1875 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1876 | return -EINVAL; |
1877 | irq->u.emerg.code = s390int->parm; | |
1878 | break; | |
1879 | case KVM_S390_MCHK: | |
1880 | irq->u.mchk.mcic = s390int->parm64; | |
1881 | break; | |
1882 | } | |
1883 | return 0; | |
1884 | } | |
1885 | ||
6cddd432 DH |
1886 | int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) |
1887 | { | |
1888 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1889 | ||
1890 | return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1891 | } | |
1892 | ||
1893 | void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) | |
1894 | { | |
1895 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1896 | ||
1897 | spin_lock(&li->lock); | |
1898 | li->irq.stop.flags = 0; | |
1899 | clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1900 | spin_unlock(&li->lock); | |
1901 | } | |
1902 | ||
79e87a10 | 1903 | static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
ba5c1e9b | 1904 | { |
0146a7b0 | 1905 | int rc; |
ba5c1e9b | 1906 | |
383d0b05 | 1907 | switch (irq->type) { |
ba5c1e9b | 1908 | case KVM_S390_PROGRAM_INT: |
383d0b05 | 1909 | rc = __inject_prog(vcpu, irq); |
ba5c1e9b | 1910 | break; |
b7e6e4d3 | 1911 | case KVM_S390_SIGP_SET_PREFIX: |
383d0b05 | 1912 | rc = __inject_set_prefix(vcpu, irq); |
b7e6e4d3 | 1913 | break; |
ba5c1e9b | 1914 | case KVM_S390_SIGP_STOP: |
383d0b05 | 1915 | rc = __inject_sigp_stop(vcpu, irq); |
0146a7b0 | 1916 | break; |
ba5c1e9b | 1917 | case KVM_S390_RESTART: |
383d0b05 | 1918 | rc = __inject_sigp_restart(vcpu, irq); |
0146a7b0 | 1919 | break; |
e029ae5b | 1920 | case KVM_S390_INT_CLOCK_COMP: |
383d0b05 | 1921 | rc = __inject_ckc(vcpu); |
0146a7b0 | 1922 | break; |
e029ae5b | 1923 | case KVM_S390_INT_CPU_TIMER: |
383d0b05 | 1924 | rc = __inject_cpu_timer(vcpu); |
82a12737 | 1925 | break; |
7697e71f | 1926 | case KVM_S390_INT_EXTERNAL_CALL: |
383d0b05 | 1927 | rc = __inject_extcall(vcpu, irq); |
82a12737 | 1928 | break; |
ba5c1e9b | 1929 | case KVM_S390_INT_EMERGENCY: |
383d0b05 | 1930 | rc = __inject_sigp_emergency(vcpu, irq); |
ba5c1e9b | 1931 | break; |
48a3e950 | 1932 | case KVM_S390_MCHK: |
383d0b05 | 1933 | rc = __inject_mchk(vcpu, irq); |
48a3e950 | 1934 | break; |
3c038e6b | 1935 | case KVM_S390_INT_PFAULT_INIT: |
383d0b05 | 1936 | rc = __inject_pfault_init(vcpu, irq); |
3c038e6b | 1937 | break; |
ba5c1e9b CO |
1938 | case KVM_S390_INT_VIRTIO: |
1939 | case KVM_S390_INT_SERVICE: | |
d8346b7d | 1940 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
ba5c1e9b | 1941 | default: |
0146a7b0 | 1942 | rc = -EINVAL; |
ba5c1e9b | 1943 | } |
79e87a10 JF |
1944 | |
1945 | return rc; | |
1946 | } | |
1947 | ||
1948 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) | |
1949 | { | |
1950 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1951 | int rc; | |
1952 | ||
1953 | spin_lock(&li->lock); | |
1954 | rc = do_inject_vcpu(vcpu, irq); | |
4ae3c081 | 1955 | spin_unlock(&li->lock); |
0146a7b0 JF |
1956 | if (!rc) |
1957 | kvm_s390_vcpu_wakeup(vcpu); | |
0146a7b0 | 1958 | return rc; |
ba5c1e9b | 1959 | } |
c05c4186 | 1960 | |
6d3da241 | 1961 | static inline void clear_irq_list(struct list_head *_list) |
c05c4186 | 1962 | { |
6d3da241 | 1963 | struct kvm_s390_interrupt_info *inti, *n; |
c05c4186 | 1964 | |
6d3da241 | 1965 | list_for_each_entry_safe(inti, n, _list, list) { |
c05c4186 JF |
1966 | list_del(&inti->list); |
1967 | kfree(inti); | |
1968 | } | |
c05c4186 JF |
1969 | } |
1970 | ||
94aa033e JF |
1971 | static void inti_to_irq(struct kvm_s390_interrupt_info *inti, |
1972 | struct kvm_s390_irq *irq) | |
c05c4186 | 1973 | { |
94aa033e | 1974 | irq->type = inti->type; |
c05c4186 | 1975 | switch (inti->type) { |
3c038e6b DD |
1976 | case KVM_S390_INT_PFAULT_INIT: |
1977 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 | 1978 | case KVM_S390_INT_VIRTIO: |
94aa033e | 1979 | irq->u.ext = inti->ext; |
c05c4186 JF |
1980 | break; |
1981 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
94aa033e | 1982 | irq->u.io = inti->io; |
c05c4186 | 1983 | break; |
c05c4186 | 1984 | } |
c05c4186 JF |
1985 | } |
1986 | ||
6d3da241 JF |
1987 | void kvm_s390_clear_float_irqs(struct kvm *kvm) |
1988 | { | |
1989 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1990 | int i; | |
1991 | ||
1992 | spin_lock(&fi->lock); | |
f2ae45ed JF |
1993 | fi->pending_irqs = 0; |
1994 | memset(&fi->srv_signal, 0, sizeof(fi->srv_signal)); | |
1995 | memset(&fi->mchk, 0, sizeof(fi->mchk)); | |
6d3da241 JF |
1996 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1997 | clear_irq_list(&fi->lists[i]); | |
1998 | for (i = 0; i < FIRQ_MAX_COUNT; i++) | |
1999 | fi->counters[i] = 0; | |
2000 | spin_unlock(&fi->lock); | |
24160af6 | 2001 | kvm_s390_gisa_clear(kvm); |
6d3da241 JF |
2002 | }; |
2003 | ||
94aa033e | 2004 | static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len) |
c05c4186 JF |
2005 | { |
2006 | struct kvm_s390_interrupt_info *inti; | |
2007 | struct kvm_s390_float_interrupt *fi; | |
94aa033e | 2008 | struct kvm_s390_irq *buf; |
6d3da241 | 2009 | struct kvm_s390_irq *irq; |
94aa033e | 2010 | int max_irqs; |
c05c4186 JF |
2011 | int ret = 0; |
2012 | int n = 0; | |
6d3da241 | 2013 | int i; |
c05c4186 | 2014 | |
94aa033e JF |
2015 | if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0) |
2016 | return -EINVAL; | |
2017 | ||
2018 | /* | |
2019 | * We are already using -ENOMEM to signal | |
2020 | * userspace it may retry with a bigger buffer, | |
2021 | * so we need to use something else for this case | |
2022 | */ | |
2023 | buf = vzalloc(len); | |
2024 | if (!buf) | |
2025 | return -ENOBUFS; | |
2026 | ||
2027 | max_irqs = len / sizeof(struct kvm_s390_irq); | |
2028 | ||
24160af6 MM |
2029 | if (kvm->arch.gisa && |
2030 | kvm_s390_gisa_get_ipm(kvm->arch.gisa)) { | |
2031 | for (i = 0; i <= MAX_ISC; i++) { | |
2032 | if (n == max_irqs) { | |
2033 | /* signal userspace to try again */ | |
2034 | ret = -ENOMEM; | |
2035 | goto out_nolock; | |
2036 | } | |
2037 | if (kvm_s390_gisa_tac_ipm_gisc(kvm->arch.gisa, i)) { | |
2038 | irq = (struct kvm_s390_irq *) &buf[n]; | |
2039 | irq->type = KVM_S390_INT_IO(1, 0, 0, 0); | |
2040 | irq->u.io.io_int_word = isc_to_int_word(i); | |
2041 | n++; | |
2042 | } | |
2043 | } | |
2044 | } | |
c05c4186 JF |
2045 | fi = &kvm->arch.float_int; |
2046 | spin_lock(&fi->lock); | |
6d3da241 JF |
2047 | for (i = 0; i < FIRQ_LIST_COUNT; i++) { |
2048 | list_for_each_entry(inti, &fi->lists[i], list) { | |
2049 | if (n == max_irqs) { | |
2050 | /* signal userspace to try again */ | |
2051 | ret = -ENOMEM; | |
2052 | goto out; | |
2053 | } | |
2054 | inti_to_irq(inti, &buf[n]); | |
2055 | n++; | |
2056 | } | |
2057 | } | |
2058 | if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) { | |
94aa033e | 2059 | if (n == max_irqs) { |
c05c4186 JF |
2060 | /* signal userspace to try again */ |
2061 | ret = -ENOMEM; | |
6d3da241 | 2062 | goto out; |
c05c4186 | 2063 | } |
6d3da241 JF |
2064 | irq = (struct kvm_s390_irq *) &buf[n]; |
2065 | irq->type = KVM_S390_INT_SERVICE; | |
2066 | irq->u.ext = fi->srv_signal; | |
c05c4186 JF |
2067 | n++; |
2068 | } | |
6d3da241 JF |
2069 | if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
2070 | if (n == max_irqs) { | |
2071 | /* signal userspace to try again */ | |
2072 | ret = -ENOMEM; | |
2073 | goto out; | |
2074 | } | |
2075 | irq = (struct kvm_s390_irq *) &buf[n]; | |
2076 | irq->type = KVM_S390_MCHK; | |
2077 | irq->u.mchk = fi->mchk; | |
2078 | n++; | |
2079 | } | |
2080 | ||
2081 | out: | |
c05c4186 | 2082 | spin_unlock(&fi->lock); |
24160af6 | 2083 | out_nolock: |
94aa033e JF |
2084 | if (!ret && n > 0) { |
2085 | if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n)) | |
2086 | ret = -EFAULT; | |
2087 | } | |
2088 | vfree(buf); | |
c05c4186 JF |
2089 | |
2090 | return ret < 0 ? ret : n; | |
2091 | } | |
2092 | ||
2c1a48f2 YMZ |
2093 | static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr) |
2094 | { | |
2095 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
2096 | struct kvm_s390_ais_all ais; | |
2097 | ||
2098 | if (attr->attr < sizeof(ais)) | |
2099 | return -EINVAL; | |
2100 | ||
2101 | if (!test_kvm_facility(kvm, 72)) | |
2102 | return -ENOTSUPP; | |
2103 | ||
2104 | mutex_lock(&fi->ais_lock); | |
2105 | ais.simm = fi->simm; | |
2106 | ais.nimm = fi->nimm; | |
2107 | mutex_unlock(&fi->ais_lock); | |
2108 | ||
2109 | if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais))) | |
2110 | return -EFAULT; | |
2111 | ||
2112 | return 0; | |
2113 | } | |
2114 | ||
c05c4186 JF |
2115 | static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
2116 | { | |
2117 | int r; | |
2118 | ||
2119 | switch (attr->group) { | |
2120 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
94aa033e | 2121 | r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr, |
c05c4186 JF |
2122 | attr->attr); |
2123 | break; | |
2c1a48f2 YMZ |
2124 | case KVM_DEV_FLIC_AISM_ALL: |
2125 | r = flic_ais_mode_get_all(dev->kvm, attr); | |
2126 | break; | |
c05c4186 JF |
2127 | default: |
2128 | r = -EINVAL; | |
2129 | } | |
2130 | ||
2131 | return r; | |
2132 | } | |
2133 | ||
2134 | static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, | |
2135 | u64 addr) | |
2136 | { | |
2137 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
2138 | void *target = NULL; | |
2139 | void __user *source; | |
2140 | u64 size; | |
2141 | ||
2142 | if (get_user(inti->type, (u64 __user *)addr)) | |
2143 | return -EFAULT; | |
2144 | ||
2145 | switch (inti->type) { | |
3c038e6b DD |
2146 | case KVM_S390_INT_PFAULT_INIT: |
2147 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
2148 | case KVM_S390_INT_VIRTIO: |
2149 | case KVM_S390_INT_SERVICE: | |
2150 | target = (void *) &inti->ext; | |
2151 | source = &uptr->u.ext; | |
2152 | size = sizeof(inti->ext); | |
2153 | break; | |
2154 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
2155 | target = (void *) &inti->io; | |
2156 | source = &uptr->u.io; | |
2157 | size = sizeof(inti->io); | |
2158 | break; | |
2159 | case KVM_S390_MCHK: | |
2160 | target = (void *) &inti->mchk; | |
2161 | source = &uptr->u.mchk; | |
2162 | size = sizeof(inti->mchk); | |
2163 | break; | |
2164 | default: | |
2165 | return -EINVAL; | |
2166 | } | |
2167 | ||
2168 | if (copy_from_user(target, source, size)) | |
2169 | return -EFAULT; | |
2170 | ||
2171 | return 0; | |
2172 | } | |
2173 | ||
2174 | static int enqueue_floating_irq(struct kvm_device *dev, | |
2175 | struct kvm_device_attr *attr) | |
2176 | { | |
2177 | struct kvm_s390_interrupt_info *inti = NULL; | |
2178 | int r = 0; | |
2179 | int len = attr->attr; | |
2180 | ||
2181 | if (len % sizeof(struct kvm_s390_irq) != 0) | |
2182 | return -EINVAL; | |
2183 | else if (len > KVM_S390_FLIC_MAX_BUFFER) | |
2184 | return -EINVAL; | |
2185 | ||
2186 | while (len >= sizeof(struct kvm_s390_irq)) { | |
2187 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
2188 | if (!inti) | |
2189 | return -ENOMEM; | |
2190 | ||
2191 | r = copy_irq_from_user(inti, attr->addr); | |
2192 | if (r) { | |
2193 | kfree(inti); | |
2194 | return r; | |
2195 | } | |
a91b8ebe JF |
2196 | r = __inject_vm(dev->kvm, inti); |
2197 | if (r) { | |
2198 | kfree(inti); | |
2199 | return r; | |
2200 | } | |
c05c4186 JF |
2201 | len -= sizeof(struct kvm_s390_irq); |
2202 | attr->addr += sizeof(struct kvm_s390_irq); | |
2203 | } | |
2204 | ||
2205 | return r; | |
2206 | } | |
2207 | ||
841b91c5 CH |
2208 | static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
2209 | { | |
2210 | if (id >= MAX_S390_IO_ADAPTERS) | |
2211 | return NULL; | |
2212 | return kvm->arch.adapters[id]; | |
2213 | } | |
2214 | ||
2215 | static int register_io_adapter(struct kvm_device *dev, | |
2216 | struct kvm_device_attr *attr) | |
2217 | { | |
2218 | struct s390_io_adapter *adapter; | |
2219 | struct kvm_s390_io_adapter adapter_info; | |
2220 | ||
2221 | if (copy_from_user(&adapter_info, | |
2222 | (void __user *)attr->addr, sizeof(adapter_info))) | |
2223 | return -EFAULT; | |
2224 | ||
2225 | if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || | |
2226 | (dev->kvm->arch.adapters[adapter_info.id] != NULL)) | |
2227 | return -EINVAL; | |
2228 | ||
2229 | adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); | |
2230 | if (!adapter) | |
2231 | return -ENOMEM; | |
2232 | ||
2233 | INIT_LIST_HEAD(&adapter->maps); | |
2234 | init_rwsem(&adapter->maps_lock); | |
2235 | atomic_set(&adapter->nr_maps, 0); | |
2236 | adapter->id = adapter_info.id; | |
2237 | adapter->isc = adapter_info.isc; | |
2238 | adapter->maskable = adapter_info.maskable; | |
2239 | adapter->masked = false; | |
2240 | adapter->swap = adapter_info.swap; | |
08fab50d FL |
2241 | adapter->suppressible = (adapter_info.flags) & |
2242 | KVM_S390_ADAPTER_SUPPRESSIBLE; | |
841b91c5 CH |
2243 | dev->kvm->arch.adapters[adapter->id] = adapter; |
2244 | ||
2245 | return 0; | |
2246 | } | |
2247 | ||
2248 | int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) | |
2249 | { | |
2250 | int ret; | |
2251 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
2252 | ||
2253 | if (!adapter || !adapter->maskable) | |
2254 | return -EINVAL; | |
2255 | ret = adapter->masked; | |
2256 | adapter->masked = masked; | |
2257 | return ret; | |
2258 | } | |
2259 | ||
2260 | static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) | |
2261 | { | |
2262 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
2263 | struct s390_map_info *map; | |
2264 | int ret; | |
2265 | ||
2266 | if (!adapter || !addr) | |
2267 | return -EINVAL; | |
2268 | ||
2269 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
2270 | if (!map) { | |
2271 | ret = -ENOMEM; | |
2272 | goto out; | |
2273 | } | |
2274 | INIT_LIST_HEAD(&map->list); | |
2275 | map->guest_addr = addr; | |
6e0a0431 | 2276 | map->addr = gmap_translate(kvm->arch.gmap, addr); |
841b91c5 CH |
2277 | if (map->addr == -EFAULT) { |
2278 | ret = -EFAULT; | |
2279 | goto out; | |
2280 | } | |
2281 | ret = get_user_pages_fast(map->addr, 1, 1, &map->page); | |
2282 | if (ret < 0) | |
2283 | goto out; | |
2284 | BUG_ON(ret != 1); | |
2285 | down_write(&adapter->maps_lock); | |
2286 | if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { | |
2287 | list_add_tail(&map->list, &adapter->maps); | |
2288 | ret = 0; | |
2289 | } else { | |
2290 | put_page(map->page); | |
2291 | ret = -EINVAL; | |
2292 | } | |
2293 | up_write(&adapter->maps_lock); | |
2294 | out: | |
2295 | if (ret) | |
2296 | kfree(map); | |
2297 | return ret; | |
2298 | } | |
2299 | ||
2300 | static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) | |
2301 | { | |
2302 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
2303 | struct s390_map_info *map, *tmp; | |
2304 | int found = 0; | |
2305 | ||
2306 | if (!adapter || !addr) | |
2307 | return -EINVAL; | |
2308 | ||
2309 | down_write(&adapter->maps_lock); | |
2310 | list_for_each_entry_safe(map, tmp, &adapter->maps, list) { | |
2311 | if (map->guest_addr == addr) { | |
2312 | found = 1; | |
2313 | atomic_dec(&adapter->nr_maps); | |
2314 | list_del(&map->list); | |
2315 | put_page(map->page); | |
2316 | kfree(map); | |
2317 | break; | |
2318 | } | |
2319 | } | |
2320 | up_write(&adapter->maps_lock); | |
2321 | ||
2322 | return found ? 0 : -EINVAL; | |
2323 | } | |
2324 | ||
2325 | void kvm_s390_destroy_adapters(struct kvm *kvm) | |
2326 | { | |
2327 | int i; | |
2328 | struct s390_map_info *map, *tmp; | |
2329 | ||
2330 | for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { | |
2331 | if (!kvm->arch.adapters[i]) | |
2332 | continue; | |
2333 | list_for_each_entry_safe(map, tmp, | |
2334 | &kvm->arch.adapters[i]->maps, list) { | |
2335 | list_del(&map->list); | |
2336 | put_page(map->page); | |
2337 | kfree(map); | |
2338 | } | |
2339 | kfree(kvm->arch.adapters[i]); | |
2340 | } | |
2341 | } | |
2342 | ||
2343 | static int modify_io_adapter(struct kvm_device *dev, | |
2344 | struct kvm_device_attr *attr) | |
2345 | { | |
2346 | struct kvm_s390_io_adapter_req req; | |
2347 | struct s390_io_adapter *adapter; | |
2348 | int ret; | |
2349 | ||
2350 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
2351 | return -EFAULT; | |
2352 | ||
2353 | adapter = get_io_adapter(dev->kvm, req.id); | |
2354 | if (!adapter) | |
2355 | return -EINVAL; | |
2356 | switch (req.type) { | |
2357 | case KVM_S390_IO_ADAPTER_MASK: | |
2358 | ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); | |
2359 | if (ret > 0) | |
2360 | ret = 0; | |
2361 | break; | |
2362 | case KVM_S390_IO_ADAPTER_MAP: | |
2363 | ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); | |
2364 | break; | |
2365 | case KVM_S390_IO_ADAPTER_UNMAP: | |
2366 | ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); | |
2367 | break; | |
2368 | default: | |
2369 | ret = -EINVAL; | |
2370 | } | |
2371 | ||
2372 | return ret; | |
2373 | } | |
2374 | ||
6d28f789 HP |
2375 | static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr) |
2376 | ||
2377 | { | |
2378 | const u64 isc_mask = 0xffUL << 24; /* all iscs set */ | |
2379 | u32 schid; | |
2380 | ||
2381 | if (attr->flags) | |
2382 | return -EINVAL; | |
2383 | if (attr->attr != sizeof(schid)) | |
2384 | return -EINVAL; | |
2385 | if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid))) | |
2386 | return -EFAULT; | |
4dd6f17e MM |
2387 | if (!schid) |
2388 | return -EINVAL; | |
6d28f789 HP |
2389 | kfree(kvm_s390_get_io_int(kvm, isc_mask, schid)); |
2390 | /* | |
2391 | * If userspace is conforming to the architecture, we can have at most | |
2392 | * one pending I/O interrupt per subchannel, so this is effectively a | |
2393 | * clear all. | |
2394 | */ | |
2395 | return 0; | |
2396 | } | |
2397 | ||
51978393 FL |
2398 | static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr) |
2399 | { | |
2400 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
2401 | struct kvm_s390_ais_req req; | |
2402 | int ret = 0; | |
2403 | ||
1ba15b24 | 2404 | if (!test_kvm_facility(kvm, 72)) |
51978393 FL |
2405 | return -ENOTSUPP; |
2406 | ||
2407 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
2408 | return -EFAULT; | |
2409 | ||
2410 | if (req.isc > MAX_ISC) | |
2411 | return -EINVAL; | |
2412 | ||
2413 | trace_kvm_s390_modify_ais_mode(req.isc, | |
2414 | (fi->simm & AIS_MODE_MASK(req.isc)) ? | |
2415 | (fi->nimm & AIS_MODE_MASK(req.isc)) ? | |
2416 | 2 : KVM_S390_AIS_MODE_SINGLE : | |
2417 | KVM_S390_AIS_MODE_ALL, req.mode); | |
2418 | ||
2419 | mutex_lock(&fi->ais_lock); | |
2420 | switch (req.mode) { | |
2421 | case KVM_S390_AIS_MODE_ALL: | |
2422 | fi->simm &= ~AIS_MODE_MASK(req.isc); | |
2423 | fi->nimm &= ~AIS_MODE_MASK(req.isc); | |
2424 | break; | |
2425 | case KVM_S390_AIS_MODE_SINGLE: | |
2426 | fi->simm |= AIS_MODE_MASK(req.isc); | |
2427 | fi->nimm &= ~AIS_MODE_MASK(req.isc); | |
2428 | break; | |
2429 | default: | |
2430 | ret = -EINVAL; | |
2431 | } | |
2432 | mutex_unlock(&fi->ais_lock); | |
2433 | ||
2434 | return ret; | |
2435 | } | |
2436 | ||
a8920950 YMZ |
2437 | static int kvm_s390_inject_airq(struct kvm *kvm, |
2438 | struct s390_io_adapter *adapter) | |
2439 | { | |
2440 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
2441 | struct kvm_s390_interrupt s390int = { | |
2442 | .type = KVM_S390_INT_IO(1, 0, 0, 0), | |
2443 | .parm = 0, | |
2496c8e7 | 2444 | .parm64 = isc_to_int_word(adapter->isc), |
a8920950 YMZ |
2445 | }; |
2446 | int ret = 0; | |
2447 | ||
1ba15b24 | 2448 | if (!test_kvm_facility(kvm, 72) || !adapter->suppressible) |
a8920950 YMZ |
2449 | return kvm_s390_inject_vm(kvm, &s390int); |
2450 | ||
2451 | mutex_lock(&fi->ais_lock); | |
2452 | if (fi->nimm & AIS_MODE_MASK(adapter->isc)) { | |
2453 | trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc); | |
2454 | goto out; | |
2455 | } | |
2456 | ||
2457 | ret = kvm_s390_inject_vm(kvm, &s390int); | |
2458 | if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) { | |
2459 | fi->nimm |= AIS_MODE_MASK(adapter->isc); | |
2460 | trace_kvm_s390_modify_ais_mode(adapter->isc, | |
2461 | KVM_S390_AIS_MODE_SINGLE, 2); | |
2462 | } | |
2463 | out: | |
2464 | mutex_unlock(&fi->ais_lock); | |
2465 | return ret; | |
2466 | } | |
2467 | ||
2468 | static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr) | |
2469 | { | |
2470 | unsigned int id = attr->attr; | |
2471 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
2472 | ||
2473 | if (!adapter) | |
2474 | return -EINVAL; | |
2475 | ||
2476 | return kvm_s390_inject_airq(kvm, adapter); | |
2477 | } | |
2478 | ||
2c1a48f2 YMZ |
2479 | static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr) |
2480 | { | |
2481 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
2482 | struct kvm_s390_ais_all ais; | |
2483 | ||
2484 | if (!test_kvm_facility(kvm, 72)) | |
2485 | return -ENOTSUPP; | |
2486 | ||
2487 | if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais))) | |
2488 | return -EFAULT; | |
2489 | ||
2490 | mutex_lock(&fi->ais_lock); | |
2491 | fi->simm = ais.simm; | |
2492 | fi->nimm = ais.nimm; | |
2493 | mutex_unlock(&fi->ais_lock); | |
2494 | ||
2495 | return 0; | |
2496 | } | |
2497 | ||
c05c4186 JF |
2498 | static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
2499 | { | |
2500 | int r = 0; | |
3c038e6b DD |
2501 | unsigned int i; |
2502 | struct kvm_vcpu *vcpu; | |
c05c4186 JF |
2503 | |
2504 | switch (attr->group) { | |
2505 | case KVM_DEV_FLIC_ENQUEUE: | |
2506 | r = enqueue_floating_irq(dev, attr); | |
2507 | break; | |
2508 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
67335e63 | 2509 | kvm_s390_clear_float_irqs(dev->kvm); |
c05c4186 | 2510 | break; |
3c038e6b DD |
2511 | case KVM_DEV_FLIC_APF_ENABLE: |
2512 | dev->kvm->arch.gmap->pfault_enabled = 1; | |
2513 | break; | |
2514 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
2515 | dev->kvm->arch.gmap->pfault_enabled = 0; | |
2516 | /* | |
2517 | * Make sure no async faults are in transition when | |
2518 | * clearing the queues. So we don't need to worry | |
2519 | * about late coming workers. | |
2520 | */ | |
2521 | synchronize_srcu(&dev->kvm->srcu); | |
2522 | kvm_for_each_vcpu(i, vcpu, dev->kvm) | |
2523 | kvm_clear_async_pf_completion_queue(vcpu); | |
2524 | break; | |
841b91c5 CH |
2525 | case KVM_DEV_FLIC_ADAPTER_REGISTER: |
2526 | r = register_io_adapter(dev, attr); | |
2527 | break; | |
2528 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
2529 | r = modify_io_adapter(dev, attr); | |
2530 | break; | |
6d28f789 HP |
2531 | case KVM_DEV_FLIC_CLEAR_IO_IRQ: |
2532 | r = clear_io_irq(dev->kvm, attr); | |
2533 | break; | |
51978393 FL |
2534 | case KVM_DEV_FLIC_AISM: |
2535 | r = modify_ais_mode(dev->kvm, attr); | |
2536 | break; | |
a8920950 YMZ |
2537 | case KVM_DEV_FLIC_AIRQ_INJECT: |
2538 | r = flic_inject_airq(dev->kvm, attr); | |
2539 | break; | |
2c1a48f2 YMZ |
2540 | case KVM_DEV_FLIC_AISM_ALL: |
2541 | r = flic_ais_mode_set_all(dev->kvm, attr); | |
2542 | break; | |
c05c4186 JF |
2543 | default: |
2544 | r = -EINVAL; | |
2545 | } | |
2546 | ||
2547 | return r; | |
2548 | } | |
2549 | ||
4f129858 HP |
2550 | static int flic_has_attr(struct kvm_device *dev, |
2551 | struct kvm_device_attr *attr) | |
2552 | { | |
2553 | switch (attr->group) { | |
2554 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
2555 | case KVM_DEV_FLIC_ENQUEUE: | |
2556 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
2557 | case KVM_DEV_FLIC_APF_ENABLE: | |
2558 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
2559 | case KVM_DEV_FLIC_ADAPTER_REGISTER: | |
2560 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
6d28f789 | 2561 | case KVM_DEV_FLIC_CLEAR_IO_IRQ: |
51978393 | 2562 | case KVM_DEV_FLIC_AISM: |
a8920950 | 2563 | case KVM_DEV_FLIC_AIRQ_INJECT: |
2c1a48f2 | 2564 | case KVM_DEV_FLIC_AISM_ALL: |
4f129858 HP |
2565 | return 0; |
2566 | } | |
2567 | return -ENXIO; | |
2568 | } | |
2569 | ||
c05c4186 JF |
2570 | static int flic_create(struct kvm_device *dev, u32 type) |
2571 | { | |
2572 | if (!dev) | |
2573 | return -EINVAL; | |
2574 | if (dev->kvm->arch.flic) | |
2575 | return -EINVAL; | |
2576 | dev->kvm->arch.flic = dev; | |
2577 | return 0; | |
2578 | } | |
2579 | ||
2580 | static void flic_destroy(struct kvm_device *dev) | |
2581 | { | |
2582 | dev->kvm->arch.flic = NULL; | |
2583 | kfree(dev); | |
2584 | } | |
2585 | ||
2586 | /* s390 floating irq controller (flic) */ | |
2587 | struct kvm_device_ops kvm_flic_ops = { | |
2588 | .name = "kvm-flic", | |
2589 | .get_attr = flic_get_attr, | |
2590 | .set_attr = flic_set_attr, | |
4f129858 | 2591 | .has_attr = flic_has_attr, |
c05c4186 JF |
2592 | .create = flic_create, |
2593 | .destroy = flic_destroy, | |
2594 | }; | |
84223598 CH |
2595 | |
2596 | static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) | |
2597 | { | |
2598 | unsigned long bit; | |
2599 | ||
2600 | bit = bit_nr + (addr % PAGE_SIZE) * 8; | |
2601 | ||
2602 | return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; | |
2603 | } | |
2604 | ||
2605 | static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, | |
2606 | u64 addr) | |
2607 | { | |
2608 | struct s390_map_info *map; | |
2609 | ||
2610 | if (!adapter) | |
2611 | return NULL; | |
2612 | ||
2613 | list_for_each_entry(map, &adapter->maps, list) { | |
2614 | if (map->guest_addr == addr) | |
2615 | return map; | |
2616 | } | |
2617 | return NULL; | |
2618 | } | |
2619 | ||
2620 | static int adapter_indicators_set(struct kvm *kvm, | |
2621 | struct s390_io_adapter *adapter, | |
2622 | struct kvm_s390_adapter_int *adapter_int) | |
2623 | { | |
2624 | unsigned long bit; | |
2625 | int summary_set, idx; | |
2626 | struct s390_map_info *info; | |
2627 | void *map; | |
2628 | ||
2629 | info = get_map_info(adapter, adapter_int->ind_addr); | |
2630 | if (!info) | |
2631 | return -1; | |
2632 | map = page_address(info->page); | |
2633 | bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); | |
2634 | set_bit(bit, map); | |
2635 | idx = srcu_read_lock(&kvm->srcu); | |
2636 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2637 | set_page_dirty_lock(info->page); | |
2638 | info = get_map_info(adapter, adapter_int->summary_addr); | |
2639 | if (!info) { | |
2640 | srcu_read_unlock(&kvm->srcu, idx); | |
2641 | return -1; | |
2642 | } | |
2643 | map = page_address(info->page); | |
2644 | bit = get_ind_bit(info->addr, adapter_int->summary_offset, | |
2645 | adapter->swap); | |
2646 | summary_set = test_and_set_bit(bit, map); | |
2647 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2648 | set_page_dirty_lock(info->page); | |
2649 | srcu_read_unlock(&kvm->srcu, idx); | |
2650 | return summary_set ? 0 : 1; | |
2651 | } | |
2652 | ||
2653 | /* | |
2654 | * < 0 - not injected due to error | |
2655 | * = 0 - coalesced, summary indicator already active | |
2656 | * > 0 - injected interrupt | |
2657 | */ | |
2658 | static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, | |
2659 | struct kvm *kvm, int irq_source_id, int level, | |
2660 | bool line_status) | |
2661 | { | |
2662 | int ret; | |
2663 | struct s390_io_adapter *adapter; | |
2664 | ||
2665 | /* We're only interested in the 0->1 transition. */ | |
2666 | if (!level) | |
2667 | return 0; | |
2668 | adapter = get_io_adapter(kvm, e->adapter.adapter_id); | |
2669 | if (!adapter) | |
2670 | return -1; | |
2671 | down_read(&adapter->maps_lock); | |
2672 | ret = adapter_indicators_set(kvm, adapter, &e->adapter); | |
2673 | up_read(&adapter->maps_lock); | |
2674 | if ((ret > 0) && !adapter->masked) { | |
a8920950 | 2675 | ret = kvm_s390_inject_airq(kvm, adapter); |
84223598 CH |
2676 | if (ret == 0) |
2677 | ret = 1; | |
2678 | } | |
2679 | return ret; | |
2680 | } | |
2681 | ||
4d62fcc0 QH |
2682 | /* |
2683 | * Inject the machine check to the guest. | |
2684 | */ | |
2685 | void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, | |
2686 | struct mcck_volatile_info *mcck_info) | |
2687 | { | |
2688 | struct kvm_s390_interrupt_info inti; | |
2689 | struct kvm_s390_irq irq; | |
2690 | struct kvm_s390_mchk_info *mchk; | |
2691 | union mci mci; | |
2692 | __u64 cr14 = 0; /* upper bits are not used */ | |
3dbf0205 | 2693 | int rc; |
4d62fcc0 QH |
2694 | |
2695 | mci.val = mcck_info->mcic; | |
2696 | if (mci.sr) | |
cc65450c | 2697 | cr14 |= CR14_RECOVERY_SUBMASK; |
4d62fcc0 | 2698 | if (mci.dg) |
cc65450c | 2699 | cr14 |= CR14_DEGRADATION_SUBMASK; |
4d62fcc0 | 2700 | if (mci.w) |
cc65450c | 2701 | cr14 |= CR14_WARNING_SUBMASK; |
4d62fcc0 QH |
2702 | |
2703 | mchk = mci.ck ? &inti.mchk : &irq.u.mchk; | |
2704 | mchk->cr14 = cr14; | |
2705 | mchk->mcic = mcck_info->mcic; | |
2706 | mchk->ext_damage_code = mcck_info->ext_damage_code; | |
2707 | mchk->failing_storage_address = mcck_info->failing_storage_address; | |
2708 | if (mci.ck) { | |
2709 | /* Inject the floating machine check */ | |
2710 | inti.type = KVM_S390_MCHK; | |
3dbf0205 | 2711 | rc = __inject_vm(vcpu->kvm, &inti); |
4d62fcc0 QH |
2712 | } else { |
2713 | /* Inject the machine check to specified vcpu */ | |
2714 | irq.type = KVM_S390_MCHK; | |
3dbf0205 | 2715 | rc = kvm_s390_inject_vcpu(vcpu, &irq); |
4d62fcc0 | 2716 | } |
3dbf0205 | 2717 | WARN_ON_ONCE(rc); |
4d62fcc0 QH |
2718 | } |
2719 | ||
c63cf538 RK |
2720 | int kvm_set_routing_entry(struct kvm *kvm, |
2721 | struct kvm_kernel_irq_routing_entry *e, | |
84223598 CH |
2722 | const struct kvm_irq_routing_entry *ue) |
2723 | { | |
2724 | int ret; | |
2725 | ||
2726 | switch (ue->type) { | |
2727 | case KVM_IRQ_ROUTING_S390_ADAPTER: | |
2728 | e->set = set_adapter_int; | |
2729 | e->adapter.summary_addr = ue->u.adapter.summary_addr; | |
2730 | e->adapter.ind_addr = ue->u.adapter.ind_addr; | |
2731 | e->adapter.summary_offset = ue->u.adapter.summary_offset; | |
2732 | e->adapter.ind_offset = ue->u.adapter.ind_offset; | |
2733 | e->adapter.adapter_id = ue->u.adapter.adapter_id; | |
2734 | ret = 0; | |
2735 | break; | |
2736 | default: | |
2737 | ret = -EINVAL; | |
2738 | } | |
2739 | ||
2740 | return ret; | |
2741 | } | |
2742 | ||
2743 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, | |
2744 | int irq_source_id, int level, bool line_status) | |
2745 | { | |
2746 | return -EINVAL; | |
2747 | } | |
816c7667 JF |
2748 | |
2749 | int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len) | |
2750 | { | |
2751 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2752 | struct kvm_s390_irq *buf; | |
2753 | int r = 0; | |
2754 | int n; | |
2755 | ||
2756 | buf = vmalloc(len); | |
2757 | if (!buf) | |
2758 | return -ENOMEM; | |
2759 | ||
2760 | if (copy_from_user((void *) buf, irqstate, len)) { | |
2761 | r = -EFAULT; | |
2762 | goto out_free; | |
2763 | } | |
2764 | ||
2765 | /* | |
2766 | * Don't allow setting the interrupt state | |
2767 | * when there are already interrupts pending | |
2768 | */ | |
2769 | spin_lock(&li->lock); | |
2770 | if (li->pending_irqs) { | |
2771 | r = -EBUSY; | |
2772 | goto out_unlock; | |
2773 | } | |
2774 | ||
2775 | for (n = 0; n < len / sizeof(*buf); n++) { | |
2776 | r = do_inject_vcpu(vcpu, &buf[n]); | |
2777 | if (r) | |
2778 | break; | |
2779 | } | |
2780 | ||
2781 | out_unlock: | |
2782 | spin_unlock(&li->lock); | |
2783 | out_free: | |
2784 | vfree(buf); | |
2785 | ||
2786 | return r; | |
2787 | } | |
2788 | ||
2789 | static void store_local_irq(struct kvm_s390_local_interrupt *li, | |
2790 | struct kvm_s390_irq *irq, | |
2791 | unsigned long irq_type) | |
2792 | { | |
2793 | switch (irq_type) { | |
2794 | case IRQ_PEND_MCHK_EX: | |
2795 | case IRQ_PEND_MCHK_REP: | |
2796 | irq->type = KVM_S390_MCHK; | |
2797 | irq->u.mchk = li->irq.mchk; | |
2798 | break; | |
2799 | case IRQ_PEND_PROG: | |
2800 | irq->type = KVM_S390_PROGRAM_INT; | |
2801 | irq->u.pgm = li->irq.pgm; | |
2802 | break; | |
2803 | case IRQ_PEND_PFAULT_INIT: | |
2804 | irq->type = KVM_S390_INT_PFAULT_INIT; | |
2805 | irq->u.ext = li->irq.ext; | |
2806 | break; | |
2807 | case IRQ_PEND_EXT_EXTERNAL: | |
2808 | irq->type = KVM_S390_INT_EXTERNAL_CALL; | |
2809 | irq->u.extcall = li->irq.extcall; | |
2810 | break; | |
2811 | case IRQ_PEND_EXT_CLOCK_COMP: | |
2812 | irq->type = KVM_S390_INT_CLOCK_COMP; | |
2813 | break; | |
2814 | case IRQ_PEND_EXT_CPU_TIMER: | |
2815 | irq->type = KVM_S390_INT_CPU_TIMER; | |
2816 | break; | |
2817 | case IRQ_PEND_SIGP_STOP: | |
2818 | irq->type = KVM_S390_SIGP_STOP; | |
2819 | irq->u.stop = li->irq.stop; | |
2820 | break; | |
2821 | case IRQ_PEND_RESTART: | |
2822 | irq->type = KVM_S390_RESTART; | |
2823 | break; | |
2824 | case IRQ_PEND_SET_PREFIX: | |
2825 | irq->type = KVM_S390_SIGP_SET_PREFIX; | |
2826 | irq->u.prefix = li->irq.prefix; | |
2827 | break; | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len) | |
2832 | { | |
a5bd7647 | 2833 | int scn; |
816c7667 JF |
2834 | unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)]; |
2835 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2836 | unsigned long pending_irqs; | |
2837 | struct kvm_s390_irq irq; | |
2838 | unsigned long irq_type; | |
2839 | int cpuaddr; | |
2840 | int n = 0; | |
2841 | ||
2842 | spin_lock(&li->lock); | |
2843 | pending_irqs = li->pending_irqs; | |
2844 | memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending, | |
2845 | sizeof(sigp_emerg_pending)); | |
2846 | spin_unlock(&li->lock); | |
2847 | ||
2848 | for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) { | |
2849 | memset(&irq, 0, sizeof(irq)); | |
2850 | if (irq_type == IRQ_PEND_EXT_EMERGENCY) | |
2851 | continue; | |
2852 | if (n + sizeof(irq) > len) | |
2853 | return -ENOBUFS; | |
2854 | store_local_irq(&vcpu->arch.local_int, &irq, irq_type); | |
2855 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2856 | return -EFAULT; | |
2857 | n += sizeof(irq); | |
2858 | } | |
2859 | ||
2860 | if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) { | |
2861 | for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) { | |
2862 | memset(&irq, 0, sizeof(irq)); | |
2863 | if (n + sizeof(irq) > len) | |
2864 | return -ENOBUFS; | |
2865 | irq.type = KVM_S390_INT_EMERGENCY; | |
2866 | irq.u.emerg.code = cpuaddr; | |
2867 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2868 | return -EFAULT; | |
2869 | n += sizeof(irq); | |
2870 | } | |
2871 | } | |
2872 | ||
a5bd7647 | 2873 | if (sca_ext_call_pending(vcpu, &scn)) { |
816c7667 JF |
2874 | if (n + sizeof(irq) > len) |
2875 | return -ENOBUFS; | |
2876 | memset(&irq, 0, sizeof(irq)); | |
2877 | irq.type = KVM_S390_INT_EXTERNAL_CALL; | |
a5bd7647 | 2878 | irq.u.extcall.code = scn; |
816c7667 JF |
2879 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) |
2880 | return -EFAULT; | |
2881 | n += sizeof(irq); | |
2882 | } | |
2883 | ||
2884 | return n; | |
2885 | } | |
d7c5cb01 MM |
2886 | |
2887 | void kvm_s390_gisa_clear(struct kvm *kvm) | |
2888 | { | |
2889 | if (kvm->arch.gisa) { | |
2890 | memset(kvm->arch.gisa, 0, sizeof(struct kvm_s390_gisa)); | |
2891 | kvm->arch.gisa->next_alert = (u32)(u64)kvm->arch.gisa; | |
2892 | VM_EVENT(kvm, 3, "gisa 0x%pK cleared", kvm->arch.gisa); | |
2893 | } | |
2894 | } | |
2895 | ||
2896 | void kvm_s390_gisa_init(struct kvm *kvm) | |
2897 | { | |
4b9f9525 | 2898 | if (css_general_characteristics.aiv) { |
f180bfda MM |
2899 | kvm->arch.gisa = &kvm->arch.sie_page2->gisa; |
2900 | VM_EVENT(kvm, 3, "gisa 0x%pK initialized", kvm->arch.gisa); | |
2901 | kvm_s390_gisa_clear(kvm); | |
2902 | } | |
d7c5cb01 MM |
2903 | } |
2904 | ||
2905 | void kvm_s390_gisa_destroy(struct kvm *kvm) | |
2906 | { | |
2907 | if (!kvm->arch.gisa) | |
2908 | return; | |
2909 | kvm->arch.gisa = NULL; | |
2910 | } |