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