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Commit | Line | Data |
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ba5c1e9b | 1 | /* |
a53c8fab | 2 | * handling kvm guest interrupts |
ba5c1e9b | 3 | * |
33b412ac | 4 | * Copyright IBM Corp. 2008, 2015 |
ba5c1e9b CO |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | */ | |
12 | ||
ca872302 | 13 | #include <linux/interrupt.h> |
ba5c1e9b | 14 | #include <linux/kvm_host.h> |
cbb870c8 | 15 | #include <linux/hrtimer.h> |
84223598 | 16 | #include <linux/mmu_context.h> |
3cd61299 | 17 | #include <linux/signal.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
383d0b05 | 19 | #include <linux/bitmap.h> |
94aa033e | 20 | #include <linux/vmalloc.h> |
cbb870c8 | 21 | #include <asm/asm-offsets.h> |
33b412ac | 22 | #include <asm/dis.h> |
7c0f6ba6 | 23 | #include <linux/uaccess.h> |
ea5f4969 | 24 | #include <asm/sclp.h> |
6d3da241 | 25 | #include <asm/isc.h> |
1e133ab2 | 26 | #include <asm/gmap.h> |
0319dae6 | 27 | #include <asm/switch_to.h> |
ff5dc149 | 28 | #include <asm/nmi.h> |
ba5c1e9b CO |
29 | #include "kvm-s390.h" |
30 | #include "gaccess.h" | |
ade38c31 | 31 | #include "trace-s390.h" |
ba5c1e9b | 32 | |
44c6ca3d | 33 | #define PFAULT_INIT 0x0600 |
60f90a14 JF |
34 | #define PFAULT_DONE 0x0680 |
35 | #define VIRTIO_PARAM 0x0d00 | |
d8346b7d | 36 | |
a5bd7647 ED |
37 | /* handle external calls via sigp interpretation facility */ |
38 | static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id) | |
39 | { | |
7d43bafc ED |
40 | int c, scn; |
41 | ||
2c1bb2be DH |
42 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND)) |
43 | return 0; | |
44 | ||
a6940674 | 45 | BUG_ON(!kvm_s390_use_sca_entries()); |
5e044315 | 46 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
47 | if (vcpu->kvm->arch.use_esca) { |
48 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
49 | union esca_sigp_ctrl sigp_ctrl = | |
50 | sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
51 | ||
52 | c = sigp_ctrl.c; | |
53 | scn = sigp_ctrl.scn; | |
54 | } else { | |
55 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
56 | union bsca_sigp_ctrl sigp_ctrl = | |
57 | sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
58 | ||
59 | c = sigp_ctrl.c; | |
60 | scn = sigp_ctrl.scn; | |
61 | } | |
5e044315 | 62 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a5bd7647 ED |
63 | |
64 | if (src_id) | |
7d43bafc | 65 | *src_id = scn; |
a5bd7647 | 66 | |
2c1bb2be | 67 | return c; |
a5bd7647 ED |
68 | } |
69 | ||
70 | static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id) | |
71 | { | |
bc784cce | 72 | int expect, rc; |
a5bd7647 | 73 | |
a6940674 | 74 | BUG_ON(!kvm_s390_use_sca_entries()); |
5e044315 | 75 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
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; | |
bc784cce | 93 | |
7d43bafc ED |
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 | } | |
5e044315 | 101 | read_unlock(&vcpu->kvm->arch.sca_lock); |
bc784cce ED |
102 | |
103 | if (rc != expect) { | |
a5bd7647 ED |
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 | { | |
a5bd7647 | 113 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
7d43bafc | 114 | int rc, expect; |
a5bd7647 | 115 | |
a6940674 DH |
116 | if (!kvm_s390_use_sca_entries()) |
117 | return; | |
a5bd7647 | 118 | atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags); |
5e044315 | 119 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
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 | } | |
5e044315 | 137 | read_unlock(&vcpu->kvm->arch.sca_lock); |
7d43bafc | 138 | WARN_ON(rc != expect); /* cannot clear? */ |
a5bd7647 ED |
139 | } |
140 | ||
3c038e6b | 141 | int psw_extint_disabled(struct kvm_vcpu *vcpu) |
ba5c1e9b CO |
142 | { |
143 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
144 | } | |
145 | ||
d8346b7d CH |
146 | static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
147 | { | |
148 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); | |
149 | } | |
150 | ||
48a3e950 CH |
151 | static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
152 | { | |
153 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); | |
154 | } | |
155 | ||
ba5c1e9b CO |
156 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
157 | { | |
fee0e0fd DH |
158 | return psw_extint_disabled(vcpu) && |
159 | psw_ioint_disabled(vcpu) && | |
160 | psw_mchk_disabled(vcpu); | |
ba5c1e9b CO |
161 | } |
162 | ||
bb78c5ec DH |
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; | |
f71d0dc5 DH |
168 | if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
169 | /* No timer interrupts when single stepping */ | |
170 | return 0; | |
bb78c5ec DH |
171 | return 1; |
172 | } | |
173 | ||
b4aec925 DH |
174 | static int ckc_irq_pending(struct kvm_vcpu *vcpu) |
175 | { | |
60417fcc | 176 | if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm)) |
b4aec925 DH |
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 | { | |
4287f247 DH |
189 | if (!cpu_timer_interrupts_enabled(vcpu)) |
190 | return 0; | |
191 | return kvm_s390_get_cpu_timer(vcpu) >> 63; | |
b4aec925 DH |
192 | } |
193 | ||
6d3da241 | 194 | static inline int is_ioirq(unsigned long irq_type) |
79fd50c6 | 195 | { |
6d3da241 JF |
196 | return ((irq_type >= IRQ_PEND_IO_ISC_0) && |
197 | (irq_type <= IRQ_PEND_IO_ISC_7)); | |
198 | } | |
79fd50c6 | 199 | |
6d3da241 JF |
200 | static uint64_t isc_to_isc_bits(int isc) |
201 | { | |
79fd50c6 CH |
202 | return (0x80 >> isc) << 24; |
203 | } | |
204 | ||
6d3da241 | 205 | static inline u8 int_word_to_isc(u32 int_word) |
ba5c1e9b | 206 | { |
6d3da241 JF |
207 | return (int_word & 0x38000000) >> 27; |
208 | } | |
209 | ||
5f94c58e | 210 | static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) |
6d3da241 | 211 | { |
5f94c58e DH |
212 | return vcpu->kvm->arch.float_int.pending_irqs | |
213 | vcpu->arch.local_int.pending_irqs; | |
383d0b05 JF |
214 | } |
215 | ||
6d3da241 JF |
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) | |
383d0b05 | 229 | { |
6d3da241 JF |
230 | unsigned long active_mask; |
231 | ||
5f94c58e | 232 | active_mask = pending_irqs(vcpu); |
ffeca0ae JF |
233 | if (!active_mask) |
234 | return 0; | |
383d0b05 JF |
235 | |
236 | if (psw_extint_disabled(vcpu)) | |
237 | active_mask &= ~IRQ_PEND_EXT_MASK; | |
6d3da241 JF |
238 | if (psw_ioint_disabled(vcpu)) |
239 | active_mask &= ~IRQ_PEND_IO_MASK; | |
240 | else | |
241 | active_mask = disable_iscs(vcpu, active_mask); | |
383d0b05 JF |
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); | |
6d3da241 JF |
250 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) |
251 | __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask); | |
383d0b05 JF |
252 | if (psw_mchk_disabled(vcpu)) |
253 | active_mask &= ~IRQ_PEND_MCHK_MASK; | |
6d3da241 JF |
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); | |
383d0b05 | 257 | |
6cddd432 DH |
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 | ||
383d0b05 JF |
264 | return active_mask; |
265 | } | |
266 | ||
ba5c1e9b CO |
267 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
268 | { | |
805de8f4 | 269 | atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
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 | { | |
805de8f4 | 275 | atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
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 | { | |
805de8f4 PZ |
281 | atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, |
282 | &vcpu->arch.sie_block->cpuflags); | |
ba5c1e9b | 283 | vcpu->arch.sie_block->lctl = 0x0000; |
27291e21 DH |
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 | } | |
ba5c1e9b CO |
291 | } |
292 | ||
293 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
294 | { | |
805de8f4 | 295 | atomic_or(flag, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
296 | } |
297 | ||
6d3da241 JF |
298 | static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) |
299 | { | |
5f94c58e | 300 | if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK)) |
6d3da241 JF |
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 | ||
383d0b05 JF |
308 | static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) |
309 | { | |
5f94c58e | 310 | if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK)) |
383d0b05 JF |
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 | { | |
5f94c58e | 320 | if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK)) |
383d0b05 JF |
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 | ||
6cddd432 DH |
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 | ||
6d3da241 JF |
334 | /* Set interception request for non-deliverable interrupts */ |
335 | static void set_intercept_indicators(struct kvm_vcpu *vcpu) | |
383d0b05 | 336 | { |
6d3da241 | 337 | set_intercept_indicators_io(vcpu); |
383d0b05 JF |
338 | set_intercept_indicators_ext(vcpu); |
339 | set_intercept_indicators_mchk(vcpu); | |
6cddd432 | 340 | set_intercept_indicators_stop(vcpu); |
383d0b05 JF |
341 | } |
342 | ||
0fb97abe JF |
343 | static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) |
344 | { | |
383d0b05 | 345 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
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); | |
467fc298 | 353 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
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)); | |
383d0b05 | 358 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
99e20009 | 359 | return rc ? -EFAULT : 0; |
0fb97abe JF |
360 | } |
361 | ||
362 | static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) | |
363 | { | |
383d0b05 | 364 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
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); | |
467fc298 | 372 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
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)); | |
383d0b05 | 377 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
99e20009 | 378 | return rc ? -EFAULT : 0; |
0fb97abe JF |
379 | } |
380 | ||
383d0b05 | 381 | static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) |
0fb97abe | 382 | { |
383d0b05 JF |
383 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
384 | struct kvm_s390_ext_info ext; | |
0fb97abe JF |
385 | int rc; |
386 | ||
383d0b05 JF |
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 | ||
3f24ba15 CB |
393 | VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx", |
394 | ext.ext_params2); | |
0fb97abe JF |
395 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
396 | KVM_S390_INT_PFAULT_INIT, | |
383d0b05 | 397 | 0, ext.ext_params2); |
0fb97abe JF |
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)); | |
383d0b05 | 405 | rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); |
99e20009 | 406 | return rc ? -EFAULT : 0; |
0fb97abe JF |
407 | } |
408 | ||
d6404ded DH |
409 | static int __write_machine_check(struct kvm_vcpu *vcpu, |
410 | struct kvm_s390_mchk_info *mchk) | |
411 | { | |
412 | unsigned long ext_sa_addr; | |
4e0b1ab7 | 413 | unsigned long lc; |
0319dae6 | 414 | freg_t fprs[NUM_FPRS]; |
ff5dc149 | 415 | union mci mci; |
d6404ded DH |
416 | int rc; |
417 | ||
ff5dc149 | 418 | mci.val = mchk->mcic; |
31d8b8d4 | 419 | /* take care of lazy register loading */ |
0319dae6 DH |
420 | save_fpu_regs(); |
421 | save_access_regs(vcpu->run->s.regs.acrs); | |
422 | ||
d6404ded | 423 | /* Extended save area */ |
916cda1a MS |
424 | rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr, |
425 | sizeof(unsigned long)); | |
4e0b1ab7 FZ |
426 | /* Only bits 0 through 63-LC are used for address formation */ |
427 | lc = ext_sa_addr & MCESA_LC_MASK; | |
428 | if (test_kvm_facility(vcpu->kvm, 133)) { | |
429 | switch (lc) { | |
430 | case 0: | |
431 | case 10: | |
432 | ext_sa_addr &= ~0x3ffUL; | |
433 | break; | |
434 | case 11: | |
435 | ext_sa_addr &= ~0x7ffUL; | |
436 | break; | |
437 | case 12: | |
438 | ext_sa_addr &= ~0xfffUL; | |
439 | break; | |
440 | default: | |
441 | ext_sa_addr = 0; | |
442 | break; | |
443 | } | |
444 | } else { | |
445 | ext_sa_addr &= ~0x3ffUL; | |
446 | } | |
447 | ||
ff5dc149 DH |
448 | if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) { |
449 | if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs, | |
450 | 512)) | |
451 | mci.vr = 0; | |
452 | } else { | |
453 | mci.vr = 0; | |
454 | } | |
4e0b1ab7 FZ |
455 | if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133) |
456 | && (lc == 11 || lc == 12)) { | |
457 | if (write_guest_abs(vcpu, ext_sa_addr + 1024, | |
458 | &vcpu->run->s.regs.gscb, 32)) | |
459 | mci.gs = 0; | |
460 | } else { | |
461 | mci.gs = 0; | |
462 | } | |
d6404ded DH |
463 | |
464 | /* General interruption information */ | |
0319dae6 | 465 | rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID); |
d6404ded DH |
466 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, |
467 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
468 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
469 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
ff5dc149 | 470 | rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE); |
d6404ded DH |
471 | |
472 | /* Register-save areas */ | |
0319dae6 DH |
473 | if (MACHINE_HAS_VX) { |
474 | convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); | |
475 | rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128); | |
476 | } else { | |
477 | rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, | |
478 | vcpu->run->s.regs.fprs, 128); | |
479 | } | |
480 | rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA, | |
481 | vcpu->run->s.regs.gprs, 128); | |
482 | rc |= put_guest_lc(vcpu, current->thread.fpu.fpc, | |
483 | (u32 __user *) __LC_FP_CREG_SAVE_AREA); | |
484 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr, | |
485 | (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA); | |
486 | rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu), | |
487 | (u64 __user *) __LC_CPU_TIMER_SAVE_AREA); | |
488 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8, | |
489 | (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA); | |
490 | rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA, | |
491 | &vcpu->run->s.regs.acrs, 64); | |
492 | rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA, | |
493 | &vcpu->arch.sie_block->gcr, 128); | |
d6404ded DH |
494 | |
495 | /* Extended interruption information */ | |
8953fb08 DH |
496 | rc |= put_guest_lc(vcpu, mchk->ext_damage_code, |
497 | (u32 __user *) __LC_EXT_DAMAGE_CODE); | |
d6404ded DH |
498 | rc |= put_guest_lc(vcpu, mchk->failing_storage_address, |
499 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); | |
500 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout, | |
501 | sizeof(mchk->fixed_logout)); | |
502 | return rc ? -EFAULT : 0; | |
503 | } | |
504 | ||
383d0b05 | 505 | static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) |
0fb97abe | 506 | { |
6d3da241 | 507 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
383d0b05 | 508 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
6d3da241 | 509 | struct kvm_s390_mchk_info mchk = {}; |
6d3da241 JF |
510 | int deliver = 0; |
511 | int rc = 0; | |
0fb97abe | 512 | |
6d3da241 | 513 | spin_lock(&fi->lock); |
383d0b05 | 514 | spin_lock(&li->lock); |
6d3da241 JF |
515 | if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) || |
516 | test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) { | |
517 | /* | |
518 | * If there was an exigent machine check pending, then any | |
519 | * repressible machine checks that might have been pending | |
520 | * are indicated along with it, so always clear bits for | |
521 | * repressible and exigent interrupts | |
522 | */ | |
523 | mchk = li->irq.mchk; | |
524 | clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
525 | clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
526 | memset(&li->irq.mchk, 0, sizeof(mchk)); | |
527 | deliver = 1; | |
528 | } | |
383d0b05 | 529 | /* |
6d3da241 JF |
530 | * We indicate floating repressible conditions along with |
531 | * other pending conditions. Channel Report Pending and Channel | |
532 | * Subsystem damage are the only two and and are indicated by | |
533 | * bits in mcic and masked in cr14. | |
383d0b05 | 534 | */ |
6d3da241 JF |
535 | if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
536 | mchk.mcic |= fi->mchk.mcic; | |
537 | mchk.cr14 |= fi->mchk.cr14; | |
538 | memset(&fi->mchk, 0, sizeof(mchk)); | |
539 | deliver = 1; | |
540 | } | |
383d0b05 | 541 | spin_unlock(&li->lock); |
6d3da241 | 542 | spin_unlock(&fi->lock); |
383d0b05 | 543 | |
6d3da241 | 544 | if (deliver) { |
3f24ba15 | 545 | VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx", |
6d3da241 JF |
546 | mchk.mcic); |
547 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
548 | KVM_S390_MCHK, | |
549 | mchk.cr14, mchk.mcic); | |
d6404ded | 550 | rc = __write_machine_check(vcpu, &mchk); |
6d3da241 | 551 | } |
d6404ded | 552 | return rc; |
0fb97abe JF |
553 | } |
554 | ||
555 | static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) | |
556 | { | |
383d0b05 | 557 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
558 | int rc; |
559 | ||
3f24ba15 | 560 | VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart"); |
0fb97abe JF |
561 | vcpu->stat.deliver_restart_signal++; |
562 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); | |
563 | ||
564 | rc = write_guest_lc(vcpu, | |
c667aeac | 565 | offsetof(struct lowcore, restart_old_psw), |
0fb97abe | 566 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
c667aeac | 567 | rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw), |
0fb97abe | 568 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
383d0b05 | 569 | clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
99e20009 | 570 | return rc ? -EFAULT : 0; |
0fb97abe JF |
571 | } |
572 | ||
383d0b05 | 573 | static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) |
0fb97abe | 574 | { |
383d0b05 JF |
575 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
576 | struct kvm_s390_prefix_info prefix; | |
577 | ||
578 | spin_lock(&li->lock); | |
579 | prefix = li->irq.prefix; | |
580 | li->irq.prefix.address = 0; | |
581 | clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
582 | spin_unlock(&li->lock); | |
0fb97abe | 583 | |
0fb97abe JF |
584 | vcpu->stat.deliver_prefix_signal++; |
585 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
586 | KVM_S390_SIGP_SET_PREFIX, | |
383d0b05 | 587 | prefix.address, 0); |
0fb97abe | 588 | |
383d0b05 | 589 | kvm_s390_set_prefix(vcpu, prefix.address); |
0fb97abe JF |
590 | return 0; |
591 | } | |
592 | ||
383d0b05 | 593 | static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) |
0fb97abe | 594 | { |
383d0b05 | 595 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe | 596 | int rc; |
383d0b05 JF |
597 | int cpu_addr; |
598 | ||
599 | spin_lock(&li->lock); | |
600 | cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
601 | clear_bit(cpu_addr, li->sigp_emerg_pending); | |
602 | if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) | |
603 | clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); | |
604 | spin_unlock(&li->lock); | |
0fb97abe | 605 | |
3f24ba15 | 606 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg"); |
0fb97abe | 607 | vcpu->stat.deliver_emergency_signal++; |
383d0b05 JF |
608 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
609 | cpu_addr, 0); | |
0fb97abe JF |
610 | |
611 | rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, | |
612 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 613 | rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
614 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
615 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
616 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
617 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 618 | return rc ? -EFAULT : 0; |
0fb97abe JF |
619 | } |
620 | ||
383d0b05 | 621 | static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) |
0fb97abe | 622 | { |
383d0b05 JF |
623 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
624 | struct kvm_s390_extcall_info extcall; | |
0fb97abe JF |
625 | int rc; |
626 | ||
383d0b05 JF |
627 | spin_lock(&li->lock); |
628 | extcall = li->irq.extcall; | |
629 | li->irq.extcall.code = 0; | |
630 | clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
631 | spin_unlock(&li->lock); | |
632 | ||
3f24ba15 | 633 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call"); |
0fb97abe JF |
634 | vcpu->stat.deliver_external_call++; |
635 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
636 | KVM_S390_INT_EXTERNAL_CALL, | |
383d0b05 | 637 | extcall.code, 0); |
0fb97abe JF |
638 | |
639 | rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, | |
640 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 641 | rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
642 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
643 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
644 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, | |
645 | sizeof(psw_t)); | |
99e20009 | 646 | return rc ? -EFAULT : 0; |
0fb97abe JF |
647 | } |
648 | ||
383d0b05 | 649 | static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) |
8712836b | 650 | { |
383d0b05 JF |
651 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
652 | struct kvm_s390_pgm_info pgm_info; | |
a9a846fd | 653 | int rc = 0, nullifying = false; |
634790b8 | 654 | u16 ilen; |
8712836b | 655 | |
383d0b05 JF |
656 | spin_lock(&li->lock); |
657 | pgm_info = li->irq.pgm; | |
658 | clear_bit(IRQ_PEND_PROG, &li->pending_irqs); | |
659 | memset(&li->irq.pgm, 0, sizeof(pgm_info)); | |
660 | spin_unlock(&li->lock); | |
661 | ||
634790b8 | 662 | ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK; |
0e8bc06a DH |
663 | VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d", |
664 | pgm_info.code, ilen); | |
0fb97abe JF |
665 | vcpu->stat.deliver_program_int++; |
666 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
383d0b05 | 667 | pgm_info.code, 0); |
0fb97abe | 668 | |
383d0b05 | 669 | switch (pgm_info.code & ~PGM_PER) { |
8712836b DH |
670 | case PGM_AFX_TRANSLATION: |
671 | case PGM_ASX_TRANSLATION: | |
672 | case PGM_EX_TRANSLATION: | |
673 | case PGM_LFX_TRANSLATION: | |
674 | case PGM_LSTE_SEQUENCE: | |
675 | case PGM_LSX_TRANSLATION: | |
676 | case PGM_LX_TRANSLATION: | |
677 | case PGM_PRIMARY_AUTHORITY: | |
678 | case PGM_SECONDARY_AUTHORITY: | |
a9a846fd TH |
679 | nullifying = true; |
680 | /* fall through */ | |
8712836b | 681 | case PGM_SPACE_SWITCH: |
383d0b05 | 682 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b DH |
683 | (u64 *)__LC_TRANS_EXC_CODE); |
684 | break; | |
685 | case PGM_ALEN_TRANSLATION: | |
686 | case PGM_ALE_SEQUENCE: | |
687 | case PGM_ASTE_INSTANCE: | |
688 | case PGM_ASTE_SEQUENCE: | |
689 | case PGM_ASTE_VALIDITY: | |
690 | case PGM_EXTENDED_AUTHORITY: | |
383d0b05 | 691 | rc = put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 692 | (u8 *)__LC_EXC_ACCESS_ID); |
a9a846fd | 693 | nullifying = true; |
8712836b DH |
694 | break; |
695 | case PGM_ASCE_TYPE: | |
696 | case PGM_PAGE_TRANSLATION: | |
697 | case PGM_REGION_FIRST_TRANS: | |
698 | case PGM_REGION_SECOND_TRANS: | |
699 | case PGM_REGION_THIRD_TRANS: | |
700 | case PGM_SEGMENT_TRANSLATION: | |
383d0b05 | 701 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 702 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 703 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 704 | (u8 *)__LC_EXC_ACCESS_ID); |
383d0b05 | 705 | rc |= put_guest_lc(vcpu, pgm_info.op_access_id, |
8712836b | 706 | (u8 *)__LC_OP_ACCESS_ID); |
a9a846fd | 707 | nullifying = true; |
8712836b DH |
708 | break; |
709 | case PGM_MONITOR: | |
383d0b05 | 710 | rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, |
a36c5393 | 711 | (u16 *)__LC_MON_CLASS_NR); |
383d0b05 | 712 | rc |= put_guest_lc(vcpu, pgm_info.mon_code, |
8712836b DH |
713 | (u64 *)__LC_MON_CODE); |
714 | break; | |
403c8648 | 715 | case PGM_VECTOR_PROCESSING: |
8712836b | 716 | case PGM_DATA: |
383d0b05 | 717 | rc = put_guest_lc(vcpu, pgm_info.data_exc_code, |
8712836b DH |
718 | (u32 *)__LC_DATA_EXC_CODE); |
719 | break; | |
720 | case PGM_PROTECTION: | |
383d0b05 | 721 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 722 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 723 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b DH |
724 | (u8 *)__LC_EXC_ACCESS_ID); |
725 | break; | |
a9a846fd TH |
726 | case PGM_STACK_FULL: |
727 | case PGM_STACK_EMPTY: | |
728 | case PGM_STACK_SPECIFICATION: | |
729 | case PGM_STACK_TYPE: | |
730 | case PGM_STACK_OPERATION: | |
731 | case PGM_TRACE_TABEL: | |
732 | case PGM_CRYPTO_OPERATION: | |
733 | nullifying = true; | |
734 | break; | |
8712836b DH |
735 | } |
736 | ||
383d0b05 JF |
737 | if (pgm_info.code & PGM_PER) { |
738 | rc |= put_guest_lc(vcpu, pgm_info.per_code, | |
8712836b | 739 | (u8 *) __LC_PER_CODE); |
383d0b05 | 740 | rc |= put_guest_lc(vcpu, pgm_info.per_atmid, |
8712836b | 741 | (u8 *)__LC_PER_ATMID); |
383d0b05 | 742 | rc |= put_guest_lc(vcpu, pgm_info.per_address, |
8712836b | 743 | (u64 *) __LC_PER_ADDRESS); |
383d0b05 | 744 | rc |= put_guest_lc(vcpu, pgm_info.per_access_id, |
8712836b DH |
745 | (u8 *) __LC_PER_ACCESS_ID); |
746 | } | |
747 | ||
eaa4f416 | 748 | if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND)) |
0e8bc06a | 749 | kvm_s390_rewind_psw(vcpu, ilen); |
a9a846fd | 750 | |
0e8bc06a DH |
751 | /* bit 1+2 of the target are the ilc, so we can directly use ilen */ |
752 | rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC); | |
2ba45968 DH |
753 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea, |
754 | (u64 *) __LC_LAST_BREAK); | |
383d0b05 | 755 | rc |= put_guest_lc(vcpu, pgm_info.code, |
8712836b DH |
756 | (u16 *)__LC_PGM_INT_CODE); |
757 | rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, | |
758 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
759 | rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, | |
760 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 761 | return rc ? -EFAULT : 0; |
0fb97abe JF |
762 | } |
763 | ||
6d3da241 | 764 | static int __must_check __deliver_service(struct kvm_vcpu *vcpu) |
0fb97abe | 765 | { |
6d3da241 JF |
766 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
767 | struct kvm_s390_ext_info ext; | |
768 | int rc = 0; | |
769 | ||
770 | spin_lock(&fi->lock); | |
771 | if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) { | |
772 | spin_unlock(&fi->lock); | |
773 | return 0; | |
774 | } | |
775 | ext = fi->srv_signal; | |
776 | memset(&fi->srv_signal, 0, sizeof(ext)); | |
777 | clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
778 | spin_unlock(&fi->lock); | |
0fb97abe | 779 | |
3f24ba15 | 780 | VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x", |
6d3da241 | 781 | ext.ext_params); |
0fb97abe | 782 | vcpu->stat.deliver_service_signal++; |
6d3da241 JF |
783 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, |
784 | ext.ext_params, 0); | |
0fb97abe JF |
785 | |
786 | rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 787 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
788 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
789 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
790 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
791 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
6d3da241 | 792 | rc |= put_guest_lc(vcpu, ext.ext_params, |
0fb97abe | 793 | (u32 *)__LC_EXT_PARAMS); |
6d3da241 | 794 | |
99e20009 | 795 | return rc ? -EFAULT : 0; |
0fb97abe JF |
796 | } |
797 | ||
6d3da241 | 798 | static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu) |
0fb97abe | 799 | { |
6d3da241 JF |
800 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
801 | struct kvm_s390_interrupt_info *inti; | |
802 | int rc = 0; | |
0fb97abe | 803 | |
6d3da241 JF |
804 | spin_lock(&fi->lock); |
805 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT], | |
806 | struct kvm_s390_interrupt_info, | |
807 | list); | |
808 | if (inti) { | |
6d3da241 JF |
809 | list_del(&inti->list); |
810 | fi->counters[FIRQ_CNTR_PFAULT] -= 1; | |
811 | } | |
812 | if (list_empty(&fi->lists[FIRQ_LIST_PFAULT])) | |
813 | clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
814 | spin_unlock(&fi->lock); | |
8712836b | 815 | |
6d3da241 | 816 | if (inti) { |
3f24ba15 CB |
817 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
818 | KVM_S390_INT_PFAULT_DONE, 0, | |
819 | inti->ext.ext_params2); | |
820 | VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx", | |
821 | inti->ext.ext_params2); | |
822 | ||
6d3da241 JF |
823 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, |
824 | (u16 *)__LC_EXT_INT_CODE); | |
825 | rc |= put_guest_lc(vcpu, PFAULT_DONE, | |
826 | (u16 *)__LC_EXT_CPU_ADDR); | |
827 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
828 | &vcpu->arch.sie_block->gpsw, | |
829 | sizeof(psw_t)); | |
830 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
831 | &vcpu->arch.sie_block->gpsw, | |
832 | sizeof(psw_t)); | |
833 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
834 | (u64 *)__LC_EXT_PARAMS2); | |
835 | kfree(inti); | |
836 | } | |
99e20009 | 837 | return rc ? -EFAULT : 0; |
0fb97abe JF |
838 | } |
839 | ||
6d3da241 | 840 | static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu) |
0fb97abe | 841 | { |
6d3da241 JF |
842 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
843 | struct kvm_s390_interrupt_info *inti; | |
844 | int rc = 0; | |
0fb97abe | 845 | |
6d3da241 JF |
846 | spin_lock(&fi->lock); |
847 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO], | |
848 | struct kvm_s390_interrupt_info, | |
849 | list); | |
850 | if (inti) { | |
851 | VCPU_EVENT(vcpu, 4, | |
3f24ba15 | 852 | "deliver: virtio parm: 0x%x,parm64: 0x%llx", |
6d3da241 JF |
853 | inti->ext.ext_params, inti->ext.ext_params2); |
854 | vcpu->stat.deliver_virtio_interrupt++; | |
855 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
856 | inti->type, | |
857 | inti->ext.ext_params, | |
858 | inti->ext.ext_params2); | |
859 | list_del(&inti->list); | |
860 | fi->counters[FIRQ_CNTR_VIRTIO] -= 1; | |
861 | } | |
862 | if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO])) | |
863 | clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
864 | spin_unlock(&fi->lock); | |
0fb97abe | 865 | |
6d3da241 JF |
866 | if (inti) { |
867 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, | |
868 | (u16 *)__LC_EXT_INT_CODE); | |
869 | rc |= put_guest_lc(vcpu, VIRTIO_PARAM, | |
870 | (u16 *)__LC_EXT_CPU_ADDR); | |
871 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
872 | &vcpu->arch.sie_block->gpsw, | |
873 | sizeof(psw_t)); | |
874 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
875 | &vcpu->arch.sie_block->gpsw, | |
876 | sizeof(psw_t)); | |
877 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
878 | (u32 *)__LC_EXT_PARAMS); | |
879 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
880 | (u64 *)__LC_EXT_PARAMS2); | |
881 | kfree(inti); | |
882 | } | |
99e20009 | 883 | return rc ? -EFAULT : 0; |
0fb97abe JF |
884 | } |
885 | ||
886 | static int __must_check __deliver_io(struct kvm_vcpu *vcpu, | |
6d3da241 | 887 | unsigned long irq_type) |
0fb97abe | 888 | { |
6d3da241 JF |
889 | struct list_head *isc_list; |
890 | struct kvm_s390_float_interrupt *fi; | |
891 | struct kvm_s390_interrupt_info *inti = NULL; | |
892 | int rc = 0; | |
0fb97abe | 893 | |
6d3da241 | 894 | fi = &vcpu->kvm->arch.float_int; |
8712836b | 895 | |
6d3da241 JF |
896 | spin_lock(&fi->lock); |
897 | isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0]; | |
898 | inti = list_first_entry_or_null(isc_list, | |
899 | struct kvm_s390_interrupt_info, | |
900 | list); | |
901 | if (inti) { | |
dcc98ea6 CB |
902 | if (inti->type & KVM_S390_INT_IO_AI_MASK) |
903 | VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)"); | |
904 | else | |
905 | VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x", | |
906 | inti->io.subchannel_id >> 8, | |
907 | inti->io.subchannel_id >> 1 & 0x3, | |
908 | inti->io.subchannel_nr); | |
909 | ||
6d3da241 JF |
910 | vcpu->stat.deliver_io_int++; |
911 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
912 | inti->type, | |
913 | ((__u32)inti->io.subchannel_id << 16) | | |
914 | inti->io.subchannel_nr, | |
915 | ((__u64)inti->io.io_int_parm << 32) | | |
916 | inti->io.io_int_word); | |
917 | list_del(&inti->list); | |
918 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
919 | } | |
920 | if (list_empty(isc_list)) | |
921 | clear_bit(irq_type, &fi->pending_irqs); | |
922 | spin_unlock(&fi->lock); | |
923 | ||
924 | if (inti) { | |
925 | rc = put_guest_lc(vcpu, inti->io.subchannel_id, | |
926 | (u16 *)__LC_SUBCHANNEL_ID); | |
927 | rc |= put_guest_lc(vcpu, inti->io.subchannel_nr, | |
928 | (u16 *)__LC_SUBCHANNEL_NR); | |
929 | rc |= put_guest_lc(vcpu, inti->io.io_int_parm, | |
930 | (u32 *)__LC_IO_INT_PARM); | |
931 | rc |= put_guest_lc(vcpu, inti->io.io_int_word, | |
932 | (u32 *)__LC_IO_INT_WORD); | |
933 | rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, | |
934 | &vcpu->arch.sie_block->gpsw, | |
935 | sizeof(psw_t)); | |
936 | rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, | |
937 | &vcpu->arch.sie_block->gpsw, | |
938 | sizeof(psw_t)); | |
939 | kfree(inti); | |
940 | } | |
383d0b05 | 941 | |
99e20009 | 942 | return rc ? -EFAULT : 0; |
383d0b05 JF |
943 | } |
944 | ||
945 | typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu); | |
946 | ||
947 | static const deliver_irq_t deliver_irq_funcs[] = { | |
948 | [IRQ_PEND_MCHK_EX] = __deliver_machine_check, | |
6d3da241 | 949 | [IRQ_PEND_MCHK_REP] = __deliver_machine_check, |
383d0b05 JF |
950 | [IRQ_PEND_PROG] = __deliver_prog, |
951 | [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal, | |
952 | [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call, | |
953 | [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc, | |
954 | [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer, | |
955 | [IRQ_PEND_RESTART] = __deliver_restart, | |
383d0b05 JF |
956 | [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix, |
957 | [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init, | |
6d3da241 JF |
958 | [IRQ_PEND_EXT_SERVICE] = __deliver_service, |
959 | [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done, | |
960 | [IRQ_PEND_VIRTIO] = __deliver_virtio, | |
383d0b05 JF |
961 | }; |
962 | ||
ea5f4969 DH |
963 | /* Check whether an external call is pending (deliverable or not) */ |
964 | int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) | |
4953919f | 965 | { |
ea5f4969 | 966 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
4953919f | 967 | |
37c5f6c8 | 968 | if (!sclp.has_sigpif) |
ea5f4969 | 969 | return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); |
4953919f | 970 | |
a5bd7647 | 971 | return sca_ext_call_pending(vcpu, NULL); |
4953919f DH |
972 | } |
973 | ||
9a022067 | 974 | int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) |
ba5c1e9b | 975 | { |
4d32ad6b DH |
976 | if (deliverable_irqs(vcpu)) |
977 | return 1; | |
ba5c1e9b | 978 | |
4d32ad6b DH |
979 | if (kvm_cpu_has_pending_timer(vcpu)) |
980 | return 1; | |
ba5c1e9b | 981 | |
ea5f4969 | 982 | /* external call pending and deliverable */ |
4d32ad6b | 983 | if (kvm_s390_ext_call_pending(vcpu) && |
ea5f4969 DH |
984 | !psw_extint_disabled(vcpu) && |
985 | (vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
4d32ad6b | 986 | return 1; |
4953919f | 987 | |
4d32ad6b DH |
988 | if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) |
989 | return 1; | |
990 | return 0; | |
ba5c1e9b CO |
991 | } |
992 | ||
3d80840d MT |
993 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
994 | { | |
b4aec925 | 995 | return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu); |
3d80840d MT |
996 | } |
997 | ||
b3c17f10 DH |
998 | static u64 __calculate_sltime(struct kvm_vcpu *vcpu) |
999 | { | |
1000 | u64 now, cputm, sltime = 0; | |
1001 | ||
1002 | if (ckc_interrupts_enabled(vcpu)) { | |
1003 | now = kvm_s390_get_tod_clock_fast(vcpu->kvm); | |
1004 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); | |
1005 | /* already expired or overflow? */ | |
1006 | if (!sltime || vcpu->arch.sie_block->ckc <= now) | |
1007 | return 0; | |
1008 | if (cpu_timer_interrupts_enabled(vcpu)) { | |
1009 | cputm = kvm_s390_get_cpu_timer(vcpu); | |
1010 | /* already expired? */ | |
1011 | if (cputm >> 63) | |
1012 | return 0; | |
1013 | return min(sltime, tod_to_ns(cputm)); | |
1014 | } | |
1015 | } else if (cpu_timer_interrupts_enabled(vcpu)) { | |
1016 | sltime = kvm_s390_get_cpu_timer(vcpu); | |
1017 | /* already expired? */ | |
1018 | if (sltime >> 63) | |
1019 | return 0; | |
1020 | } | |
1021 | return sltime; | |
1022 | } | |
1023 | ||
ba5c1e9b CO |
1024 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
1025 | { | |
b3c17f10 | 1026 | u64 sltime; |
ba5c1e9b CO |
1027 | |
1028 | vcpu->stat.exit_wait_state++; | |
ba5c1e9b | 1029 | |
0759d068 | 1030 | /* fast path */ |
118b862b | 1031 | if (kvm_arch_vcpu_runnable(vcpu)) |
0759d068 | 1032 | return 0; |
e52b2af5 | 1033 | |
ba5c1e9b CO |
1034 | if (psw_interrupts_disabled(vcpu)) { |
1035 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
b8e660b8 | 1036 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
1037 | } |
1038 | ||
b3c17f10 DH |
1039 | if (!ckc_interrupts_enabled(vcpu) && |
1040 | !cpu_timer_interrupts_enabled(vcpu)) { | |
ba5c1e9b | 1041 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
bda343ef | 1042 | __set_cpu_idle(vcpu); |
ba5c1e9b CO |
1043 | goto no_timer; |
1044 | } | |
1045 | ||
b3c17f10 DH |
1046 | sltime = __calculate_sltime(vcpu); |
1047 | if (!sltime) | |
bda343ef DH |
1048 | return 0; |
1049 | ||
1050 | __set_cpu_idle(vcpu); | |
8b0e1953 | 1051 | hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL); |
b3c17f10 | 1052 | VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime); |
ba5c1e9b | 1053 | no_timer: |
800c1065 | 1054 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
0759d068 | 1055 | kvm_vcpu_block(vcpu); |
ba5c1e9b | 1056 | __unset_cpu_idle(vcpu); |
800c1065 TH |
1057 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
1058 | ||
2d00f759 | 1059 | hrtimer_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
1060 | return 0; |
1061 | } | |
1062 | ||
0e9c85a5 DH |
1063 | void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
1064 | { | |
3491caf2 CB |
1065 | /* |
1066 | * We cannot move this into the if, as the CPU might be already | |
1067 | * in kvm_vcpu_block without having the waitqueue set (polling) | |
1068 | */ | |
1069 | vcpu->valid_wakeup = true; | |
8577370f | 1070 | if (swait_active(&vcpu->wq)) { |
0e9c85a5 DH |
1071 | /* |
1072 | * The vcpu gave up the cpu voluntarily, mark it as a good | |
1073 | * yield-candidate. | |
1074 | */ | |
1075 | vcpu->preempted = true; | |
8577370f | 1076 | swake_up(&vcpu->wq); |
ce2e4f0b | 1077 | vcpu->stat.halt_wakeup++; |
0e9c85a5 | 1078 | } |
adbf1698 DH |
1079 | /* |
1080 | * The VCPU might not be sleeping but is executing the VSIE. Let's | |
1081 | * kick it, so it leaves the SIE to process the request. | |
1082 | */ | |
1083 | kvm_s390_vsie_kick(vcpu); | |
0e9c85a5 DH |
1084 | } |
1085 | ||
ca872302 CB |
1086 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
1087 | { | |
1088 | struct kvm_vcpu *vcpu; | |
b3c17f10 | 1089 | u64 sltime; |
ca872302 CB |
1090 | |
1091 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
b3c17f10 | 1092 | sltime = __calculate_sltime(vcpu); |
ca872302 | 1093 | |
2d00f759 DH |
1094 | /* |
1095 | * If the monotonic clock runs faster than the tod clock we might be | |
1096 | * woken up too early and have to go back to sleep to avoid deadlocks. | |
1097 | */ | |
b3c17f10 | 1098 | if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime))) |
2d00f759 DH |
1099 | return HRTIMER_RESTART; |
1100 | kvm_s390_vcpu_wakeup(vcpu); | |
ca872302 CB |
1101 | return HRTIMER_NORESTART; |
1102 | } | |
ba5c1e9b | 1103 | |
2ed10cc1 JF |
1104 | void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
1105 | { | |
1106 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2ed10cc1 | 1107 | |
4ae3c081 | 1108 | spin_lock(&li->lock); |
383d0b05 JF |
1109 | li->pending_irqs = 0; |
1110 | bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
1111 | memset(&li->irq, 0, sizeof(li->irq)); | |
4ae3c081 | 1112 | spin_unlock(&li->lock); |
4953919f | 1113 | |
a5bd7647 | 1114 | sca_clear_ext_call(vcpu); |
2ed10cc1 JF |
1115 | } |
1116 | ||
614aeab4 | 1117 | int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
ba5c1e9b | 1118 | { |
180c12fb | 1119 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
383d0b05 | 1120 | deliver_irq_t func; |
79395031 | 1121 | int rc = 0; |
383d0b05 | 1122 | unsigned long irq_type; |
6d3da241 | 1123 | unsigned long irqs; |
ba5c1e9b CO |
1124 | |
1125 | __reset_intercept_indicators(vcpu); | |
ba5c1e9b | 1126 | |
383d0b05 JF |
1127 | /* pending ckc conditions might have been invalidated */ |
1128 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
b4aec925 | 1129 | if (ckc_irq_pending(vcpu)) |
383d0b05 JF |
1130 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
1131 | ||
b4aec925 DH |
1132 | /* pending cpu timer conditions might have been invalidated */ |
1133 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
1134 | if (cpu_timer_irq_pending(vcpu)) | |
1135 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
1136 | ||
ffeca0ae | 1137 | while ((irqs = deliverable_irqs(vcpu)) && !rc) { |
383d0b05 | 1138 | /* bits are in the order of interrupt priority */ |
6d3da241 | 1139 | irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT); |
6d3da241 JF |
1140 | if (is_ioirq(irq_type)) { |
1141 | rc = __deliver_io(vcpu, irq_type); | |
1142 | } else { | |
1143 | func = deliver_irq_funcs[irq_type]; | |
1144 | if (!func) { | |
1145 | WARN_ON_ONCE(func == NULL); | |
1146 | clear_bit(irq_type, &li->pending_irqs); | |
1147 | continue; | |
1148 | } | |
1149 | rc = func(vcpu); | |
383d0b05 | 1150 | } |
ffeca0ae | 1151 | } |
383d0b05 | 1152 | |
6d3da241 | 1153 | set_intercept_indicators(vcpu); |
79395031 JF |
1154 | |
1155 | return rc; | |
ba5c1e9b CO |
1156 | } |
1157 | ||
383d0b05 | 1158 | static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1159 | { |
1160 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1161 | ||
ed2afcfa DH |
1162 | VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code); |
1163 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
1164 | irq->u.pgm.code, 0); | |
1165 | ||
634790b8 DH |
1166 | if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) { |
1167 | /* auto detection if no valid ILC was given */ | |
1168 | irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK; | |
1169 | irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu); | |
1170 | irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID; | |
1171 | } | |
1172 | ||
238293b1 DH |
1173 | if (irq->u.pgm.code == PGM_PER) { |
1174 | li->irq.pgm.code |= PGM_PER; | |
634790b8 | 1175 | li->irq.pgm.flags = irq->u.pgm.flags; |
238293b1 DH |
1176 | /* only modify PER related information */ |
1177 | li->irq.pgm.per_address = irq->u.pgm.per_address; | |
1178 | li->irq.pgm.per_code = irq->u.pgm.per_code; | |
1179 | li->irq.pgm.per_atmid = irq->u.pgm.per_atmid; | |
1180 | li->irq.pgm.per_access_id = irq->u.pgm.per_access_id; | |
1181 | } else if (!(irq->u.pgm.code & PGM_PER)) { | |
1182 | li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) | | |
1183 | irq->u.pgm.code; | |
634790b8 | 1184 | li->irq.pgm.flags = irq->u.pgm.flags; |
238293b1 DH |
1185 | /* only modify non-PER information */ |
1186 | li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code; | |
1187 | li->irq.pgm.mon_code = irq->u.pgm.mon_code; | |
1188 | li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code; | |
1189 | li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr; | |
1190 | li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id; | |
1191 | li->irq.pgm.op_access_id = irq->u.pgm.op_access_id; | |
1192 | } else { | |
1193 | li->irq.pgm = irq->u.pgm; | |
1194 | } | |
9185124e | 1195 | set_bit(IRQ_PEND_PROG, &li->pending_irqs); |
0146a7b0 JF |
1196 | return 0; |
1197 | } | |
1198 | ||
383d0b05 | 1199 | static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1200 | { |
1201 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1202 | ||
3f24ba15 CB |
1203 | VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx", |
1204 | irq->u.ext.ext_params2); | |
383d0b05 JF |
1205 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, |
1206 | irq->u.ext.ext_params, | |
ed2afcfa | 1207 | irq->u.ext.ext_params2); |
383d0b05 JF |
1208 | |
1209 | li->irq.ext = irq->u.ext; | |
1210 | set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
805de8f4 | 1211 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1212 | return 0; |
1213 | } | |
1214 | ||
0675d92d | 1215 | static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1216 | { |
1217 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1218 | struct kvm_s390_extcall_info *extcall = &li->irq.extcall; |
ea5f4969 | 1219 | uint16_t src_id = irq->u.extcall.code; |
0146a7b0 | 1220 | |
3f24ba15 | 1221 | VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u", |
ea5f4969 | 1222 | src_id); |
383d0b05 | 1223 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, |
ed2afcfa | 1224 | src_id, 0); |
ea5f4969 DH |
1225 | |
1226 | /* sending vcpu invalid */ | |
152e9f65 | 1227 | if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL) |
ea5f4969 DH |
1228 | return -EINVAL; |
1229 | ||
37c5f6c8 | 1230 | if (sclp.has_sigpif) |
a5bd7647 | 1231 | return sca_inject_ext_call(vcpu, src_id); |
383d0b05 | 1232 | |
b938eace | 1233 | if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) |
ea5f4969 | 1234 | return -EBUSY; |
383d0b05 | 1235 | *extcall = irq->u.extcall; |
805de8f4 | 1236 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1237 | return 0; |
1238 | } | |
1239 | ||
383d0b05 | 1240 | static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1241 | { |
1242 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1243 | struct kvm_s390_prefix_info *prefix = &li->irq.prefix; |
0146a7b0 | 1244 | |
ed2afcfa | 1245 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x", |
556cc0da | 1246 | irq->u.prefix.address); |
383d0b05 | 1247 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, |
ed2afcfa | 1248 | irq->u.prefix.address, 0); |
383d0b05 | 1249 | |
a3a9c59a DH |
1250 | if (!is_vcpu_stopped(vcpu)) |
1251 | return -EBUSY; | |
1252 | ||
383d0b05 JF |
1253 | *prefix = irq->u.prefix; |
1254 | set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
0146a7b0 JF |
1255 | return 0; |
1256 | } | |
1257 | ||
6cddd432 | 1258 | #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) |
383d0b05 | 1259 | static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1260 | { |
1261 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2822545f | 1262 | struct kvm_s390_stop_info *stop = &li->irq.stop; |
6cddd432 | 1263 | int rc = 0; |
0146a7b0 | 1264 | |
ed2afcfa | 1265 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0); |
383d0b05 | 1266 | |
2822545f DH |
1267 | if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) |
1268 | return -EINVAL; | |
1269 | ||
6cddd432 DH |
1270 | if (is_vcpu_stopped(vcpu)) { |
1271 | if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) | |
1272 | rc = kvm_s390_store_status_unloaded(vcpu, | |
1273 | KVM_S390_STORE_STATUS_NOADDR); | |
1274 | return rc; | |
1275 | } | |
1276 | ||
1277 | if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) | |
1278 | return -EBUSY; | |
2822545f | 1279 | stop->flags = irq->u.stop.flags; |
6cddd432 | 1280 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); |
0146a7b0 JF |
1281 | return 0; |
1282 | } | |
1283 | ||
1284 | static int __inject_sigp_restart(struct kvm_vcpu *vcpu, | |
383d0b05 | 1285 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1286 | { |
1287 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1288 | ||
3f24ba15 | 1289 | VCPU_EVENT(vcpu, 3, "%s", "inject: restart int"); |
ed2afcfa | 1290 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); |
383d0b05 JF |
1291 | |
1292 | set_bit(IRQ_PEND_RESTART, &li->pending_irqs); | |
0146a7b0 JF |
1293 | return 0; |
1294 | } | |
1295 | ||
1296 | static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, | |
383d0b05 | 1297 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1298 | { |
1299 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1300 | ||
3f24ba15 | 1301 | VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u", |
383d0b05 JF |
1302 | irq->u.emerg.code); |
1303 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, | |
ed2afcfa | 1304 | irq->u.emerg.code, 0); |
383d0b05 | 1305 | |
b85de33a DH |
1306 | /* sending vcpu invalid */ |
1307 | if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL) | |
1308 | return -EINVAL; | |
1309 | ||
49538d12 | 1310 | set_bit(irq->u.emerg.code, li->sigp_emerg_pending); |
383d0b05 | 1311 | set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
805de8f4 | 1312 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1313 | return 0; |
1314 | } | |
1315 | ||
383d0b05 | 1316 | static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1317 | { |
1318 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1319 | struct kvm_s390_mchk_info *mchk = &li->irq.mchk; |
0146a7b0 | 1320 | |
3f24ba15 | 1321 | VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx", |
556cc0da | 1322 | irq->u.mchk.mcic); |
383d0b05 | 1323 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, |
ed2afcfa | 1324 | irq->u.mchk.mcic); |
383d0b05 JF |
1325 | |
1326 | /* | |
fc2020cf JF |
1327 | * Because repressible machine checks can be indicated along with |
1328 | * exigent machine checks (PoP, Chapter 11, Interruption action) | |
1329 | * we need to combine cr14, mcic and external damage code. | |
1330 | * Failing storage address and the logout area should not be or'ed | |
1331 | * together, we just indicate the last occurrence of the corresponding | |
1332 | * machine check | |
383d0b05 | 1333 | */ |
fc2020cf | 1334 | mchk->cr14 |= irq->u.mchk.cr14; |
383d0b05 | 1335 | mchk->mcic |= irq->u.mchk.mcic; |
fc2020cf JF |
1336 | mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; |
1337 | mchk->failing_storage_address = irq->u.mchk.failing_storage_address; | |
1338 | memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, | |
1339 | sizeof(mchk->fixed_logout)); | |
383d0b05 JF |
1340 | if (mchk->mcic & MCHK_EX_MASK) |
1341 | set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
1342 | else if (mchk->mcic & MCHK_REP_MASK) | |
1343 | set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
0146a7b0 JF |
1344 | return 0; |
1345 | } | |
1346 | ||
383d0b05 | 1347 | static int __inject_ckc(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1348 | { |
1349 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1350 | ||
3f24ba15 | 1351 | VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external"); |
383d0b05 | 1352 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, |
ed2afcfa | 1353 | 0, 0); |
383d0b05 JF |
1354 | |
1355 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
805de8f4 | 1356 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1357 | return 0; |
1358 | } | |
1359 | ||
383d0b05 | 1360 | static int __inject_cpu_timer(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1361 | { |
1362 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1363 | ||
3f24ba15 | 1364 | VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external"); |
383d0b05 | 1365 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, |
ed2afcfa | 1366 | 0, 0); |
383d0b05 JF |
1367 | |
1368 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
805de8f4 | 1369 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
ba5c1e9b CO |
1370 | return 0; |
1371 | } | |
1372 | ||
6d3da241 JF |
1373 | static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm, |
1374 | int isc, u32 schid) | |
1375 | { | |
1376 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1377 | struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1378 | struct kvm_s390_interrupt_info *iter; | |
1379 | u16 id = (schid & 0xffff0000U) >> 16; | |
1380 | u16 nr = schid & 0x0000ffffU; | |
1381 | ||
1382 | spin_lock(&fi->lock); | |
1383 | list_for_each_entry(iter, isc_list, list) { | |
1384 | if (schid && (id != iter->io.subchannel_id || | |
1385 | nr != iter->io.subchannel_nr)) | |
1386 | continue; | |
1387 | /* found an appropriate entry */ | |
1388 | list_del_init(&iter->list); | |
1389 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
1390 | if (list_empty(isc_list)) | |
1391 | clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); | |
1392 | spin_unlock(&fi->lock); | |
1393 | return iter; | |
1394 | } | |
1395 | spin_unlock(&fi->lock); | |
1396 | return NULL; | |
1397 | } | |
383d0b05 | 1398 | |
6d3da241 JF |
1399 | /* |
1400 | * Dequeue and return an I/O interrupt matching any of the interruption | |
1401 | * subclasses as designated by the isc mask in cr6 and the schid (if != 0). | |
1402 | */ | |
fa6b7fe9 | 1403 | struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
6d3da241 JF |
1404 | u64 isc_mask, u32 schid) |
1405 | { | |
1406 | struct kvm_s390_interrupt_info *inti = NULL; | |
1407 | int isc; | |
1408 | ||
1409 | for (isc = 0; isc <= MAX_ISC && !inti; isc++) { | |
1410 | if (isc_mask & isc_to_isc_bits(isc)) | |
1411 | inti = get_io_int(kvm, isc, schid); | |
1412 | } | |
1413 | return inti; | |
1414 | } | |
1415 | ||
1416 | #define SCCB_MASK 0xFFFFFFF8 | |
1417 | #define SCCB_EVENT_PENDING 0x3 | |
1418 | ||
1419 | static int __inject_service(struct kvm *kvm, | |
1420 | struct kvm_s390_interrupt_info *inti) | |
1421 | { | |
1422 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1423 | ||
1424 | spin_lock(&fi->lock); | |
1425 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING; | |
1426 | /* | |
1427 | * Early versions of the QEMU s390 bios will inject several | |
1428 | * service interrupts after another without handling a | |
1429 | * condition code indicating busy. | |
1430 | * We will silently ignore those superfluous sccb values. | |
1431 | * A future version of QEMU will take care of serialization | |
1432 | * of servc requests | |
1433 | */ | |
1434 | if (fi->srv_signal.ext_params & SCCB_MASK) | |
1435 | goto out; | |
1436 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK; | |
1437 | set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
1438 | out: | |
1439 | spin_unlock(&fi->lock); | |
1440 | kfree(inti); | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | static int __inject_virtio(struct kvm *kvm, | |
1445 | struct kvm_s390_interrupt_info *inti) | |
1446 | { | |
1447 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1448 | ||
1449 | spin_lock(&fi->lock); | |
1450 | if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) { | |
1451 | spin_unlock(&fi->lock); | |
1452 | return -EBUSY; | |
1453 | } | |
1454 | fi->counters[FIRQ_CNTR_VIRTIO] += 1; | |
1455 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]); | |
1456 | set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
1457 | spin_unlock(&fi->lock); | |
1458 | return 0; | |
1459 | } | |
1460 | ||
1461 | static int __inject_pfault_done(struct kvm *kvm, | |
1462 | struct kvm_s390_interrupt_info *inti) | |
1463 | { | |
1464 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1465 | ||
1466 | spin_lock(&fi->lock); | |
1467 | if (fi->counters[FIRQ_CNTR_PFAULT] >= | |
1468 | (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) { | |
1469 | spin_unlock(&fi->lock); | |
1470 | return -EBUSY; | |
1471 | } | |
1472 | fi->counters[FIRQ_CNTR_PFAULT] += 1; | |
1473 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]); | |
1474 | set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
1475 | spin_unlock(&fi->lock); | |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | #define CR_PENDING_SUBCLASS 28 | |
1480 | static int __inject_float_mchk(struct kvm *kvm, | |
1481 | struct kvm_s390_interrupt_info *inti) | |
1482 | { | |
1483 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1484 | ||
1485 | spin_lock(&fi->lock); | |
1486 | fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS); | |
1487 | fi->mchk.mcic |= inti->mchk.mcic; | |
1488 | set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs); | |
1489 | spin_unlock(&fi->lock); | |
1490 | kfree(inti); | |
1491 | return 0; | |
1492 | } | |
1493 | ||
1494 | static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
fa6b7fe9 CH |
1495 | { |
1496 | struct kvm_s390_float_interrupt *fi; | |
6d3da241 JF |
1497 | struct list_head *list; |
1498 | int isc; | |
fa6b7fe9 | 1499 | |
fa6b7fe9 CH |
1500 | fi = &kvm->arch.float_int; |
1501 | spin_lock(&fi->lock); | |
6d3da241 JF |
1502 | if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) { |
1503 | spin_unlock(&fi->lock); | |
1504 | return -EBUSY; | |
a91b8ebe | 1505 | } |
6d3da241 JF |
1506 | fi->counters[FIRQ_CNTR_IO] += 1; |
1507 | ||
dcc98ea6 CB |
1508 | if (inti->type & KVM_S390_INT_IO_AI_MASK) |
1509 | VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)"); | |
1510 | else | |
1511 | VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x", | |
1512 | inti->io.subchannel_id >> 8, | |
1513 | inti->io.subchannel_id >> 1 & 0x3, | |
1514 | inti->io.subchannel_nr); | |
6d3da241 JF |
1515 | isc = int_word_to_isc(inti->io.io_int_word); |
1516 | list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1517 | list_add_tail(&inti->list, list); | |
1518 | set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); | |
fa6b7fe9 | 1519 | spin_unlock(&fi->lock); |
6d3da241 | 1520 | return 0; |
fa6b7fe9 | 1521 | } |
ba5c1e9b | 1522 | |
96e0ed23 DH |
1523 | /* |
1524 | * Find a destination VCPU for a floating irq and kick it. | |
1525 | */ | |
1526 | static void __floating_irq_kick(struct kvm *kvm, u64 type) | |
ba5c1e9b | 1527 | { |
96e0ed23 | 1528 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
180c12fb | 1529 | struct kvm_s390_local_interrupt *li; |
96e0ed23 DH |
1530 | struct kvm_vcpu *dst_vcpu; |
1531 | int sigcpu, online_vcpus, nr_tries = 0; | |
1532 | ||
1533 | online_vcpus = atomic_read(&kvm->online_vcpus); | |
1534 | if (!online_vcpus) | |
1535 | return; | |
1536 | ||
1537 | /* find idle VCPUs first, then round robin */ | |
1538 | sigcpu = find_first_bit(fi->idle_mask, online_vcpus); | |
1539 | if (sigcpu == online_vcpus) { | |
1540 | do { | |
1541 | sigcpu = fi->next_rr_cpu; | |
1542 | fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus; | |
1543 | /* avoid endless loops if all vcpus are stopped */ | |
1544 | if (nr_tries++ >= online_vcpus) | |
1545 | return; | |
1546 | } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu))); | |
1547 | } | |
1548 | dst_vcpu = kvm_get_vcpu(kvm, sigcpu); | |
1549 | ||
1550 | /* make the VCPU drop out of the SIE, or wake it up if sleeping */ | |
1551 | li = &dst_vcpu->arch.local_int; | |
1552 | spin_lock(&li->lock); | |
1553 | switch (type) { | |
1554 | case KVM_S390_MCHK: | |
805de8f4 | 1555 | atomic_or(CPUSTAT_STOP_INT, li->cpuflags); |
96e0ed23 DH |
1556 | break; |
1557 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
805de8f4 | 1558 | atomic_or(CPUSTAT_IO_INT, li->cpuflags); |
96e0ed23 DH |
1559 | break; |
1560 | default: | |
805de8f4 | 1561 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
96e0ed23 DH |
1562 | break; |
1563 | } | |
1564 | spin_unlock(&li->lock); | |
1565 | kvm_s390_vcpu_wakeup(dst_vcpu); | |
1566 | } | |
1567 | ||
1568 | static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
1569 | { | |
6d3da241 JF |
1570 | u64 type = READ_ONCE(inti->type); |
1571 | int rc; | |
ba5c1e9b | 1572 | |
6d3da241 JF |
1573 | switch (type) { |
1574 | case KVM_S390_MCHK: | |
1575 | rc = __inject_float_mchk(kvm, inti); | |
1576 | break; | |
1577 | case KVM_S390_INT_VIRTIO: | |
1578 | rc = __inject_virtio(kvm, inti); | |
1579 | break; | |
1580 | case KVM_S390_INT_SERVICE: | |
1581 | rc = __inject_service(kvm, inti); | |
1582 | break; | |
1583 | case KVM_S390_INT_PFAULT_DONE: | |
1584 | rc = __inject_pfault_done(kvm, inti); | |
1585 | break; | |
1586 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1587 | rc = __inject_io(kvm, inti); | |
1588 | break; | |
1589 | default: | |
a91b8ebe | 1590 | rc = -EINVAL; |
c05c4186 | 1591 | } |
6d3da241 JF |
1592 | if (rc) |
1593 | return rc; | |
1594 | ||
96e0ed23 | 1595 | __floating_irq_kick(kvm, type); |
6d3da241 | 1596 | return 0; |
c05c4186 JF |
1597 | } |
1598 | ||
1599 | int kvm_s390_inject_vm(struct kvm *kvm, | |
1600 | struct kvm_s390_interrupt *s390int) | |
1601 | { | |
1602 | struct kvm_s390_interrupt_info *inti; | |
428d53be | 1603 | int rc; |
c05c4186 | 1604 | |
ba5c1e9b CO |
1605 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
1606 | if (!inti) | |
1607 | return -ENOMEM; | |
1608 | ||
c05c4186 JF |
1609 | inti->type = s390int->type; |
1610 | switch (inti->type) { | |
ba5c1e9b | 1611 | case KVM_S390_INT_VIRTIO: |
33e19115 | 1612 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b | 1613 | s390int->parm, s390int->parm64); |
ba5c1e9b CO |
1614 | inti->ext.ext_params = s390int->parm; |
1615 | inti->ext.ext_params2 = s390int->parm64; | |
1616 | break; | |
1617 | case KVM_S390_INT_SERVICE: | |
3f24ba15 | 1618 | VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm); |
ba5c1e9b CO |
1619 | inti->ext.ext_params = s390int->parm; |
1620 | break; | |
3c038e6b | 1621 | case KVM_S390_INT_PFAULT_DONE: |
3c038e6b DD |
1622 | inti->ext.ext_params2 = s390int->parm64; |
1623 | break; | |
48a3e950 | 1624 | case KVM_S390_MCHK: |
3f24ba15 | 1625 | VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx", |
48a3e950 | 1626 | s390int->parm64); |
48a3e950 CH |
1627 | inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
1628 | inti->mchk.mcic = s390int->parm64; | |
1629 | break; | |
d8346b7d | 1630 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
d8346b7d CH |
1631 | inti->io.subchannel_id = s390int->parm >> 16; |
1632 | inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; | |
1633 | inti->io.io_int_parm = s390int->parm64 >> 32; | |
1634 | inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; | |
1635 | break; | |
ba5c1e9b CO |
1636 | default: |
1637 | kfree(inti); | |
1638 | return -EINVAL; | |
1639 | } | |
ade38c31 CH |
1640 | trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
1641 | 2); | |
ba5c1e9b | 1642 | |
428d53be DH |
1643 | rc = __inject_vm(kvm, inti); |
1644 | if (rc) | |
1645 | kfree(inti); | |
1646 | return rc; | |
ba5c1e9b CO |
1647 | } |
1648 | ||
15462e37 | 1649 | int kvm_s390_reinject_io_int(struct kvm *kvm, |
2f32d4ea CH |
1650 | struct kvm_s390_interrupt_info *inti) |
1651 | { | |
15462e37 | 1652 | return __inject_vm(kvm, inti); |
2f32d4ea CH |
1653 | } |
1654 | ||
383d0b05 JF |
1655 | int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
1656 | struct kvm_s390_irq *irq) | |
1657 | { | |
1658 | irq->type = s390int->type; | |
1659 | switch (irq->type) { | |
1660 | case KVM_S390_PROGRAM_INT: | |
1661 | if (s390int->parm & 0xffff0000) | |
1662 | return -EINVAL; | |
1663 | irq->u.pgm.code = s390int->parm; | |
1664 | break; | |
1665 | case KVM_S390_SIGP_SET_PREFIX: | |
1666 | irq->u.prefix.address = s390int->parm; | |
1667 | break; | |
2822545f DH |
1668 | case KVM_S390_SIGP_STOP: |
1669 | irq->u.stop.flags = s390int->parm; | |
1670 | break; | |
383d0b05 | 1671 | case KVM_S390_INT_EXTERNAL_CALL: |
94d1f564 | 1672 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1673 | return -EINVAL; |
1674 | irq->u.extcall.code = s390int->parm; | |
1675 | break; | |
1676 | case KVM_S390_INT_EMERGENCY: | |
94d1f564 | 1677 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1678 | return -EINVAL; |
1679 | irq->u.emerg.code = s390int->parm; | |
1680 | break; | |
1681 | case KVM_S390_MCHK: | |
1682 | irq->u.mchk.mcic = s390int->parm64; | |
1683 | break; | |
1684 | } | |
1685 | return 0; | |
1686 | } | |
1687 | ||
6cddd432 DH |
1688 | int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) |
1689 | { | |
1690 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1691 | ||
1692 | return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1693 | } | |
1694 | ||
1695 | void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) | |
1696 | { | |
1697 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1698 | ||
1699 | spin_lock(&li->lock); | |
1700 | li->irq.stop.flags = 0; | |
1701 | clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1702 | spin_unlock(&li->lock); | |
1703 | } | |
1704 | ||
79e87a10 | 1705 | static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
ba5c1e9b | 1706 | { |
0146a7b0 | 1707 | int rc; |
ba5c1e9b | 1708 | |
383d0b05 | 1709 | switch (irq->type) { |
ba5c1e9b | 1710 | case KVM_S390_PROGRAM_INT: |
383d0b05 | 1711 | rc = __inject_prog(vcpu, irq); |
ba5c1e9b | 1712 | break; |
b7e6e4d3 | 1713 | case KVM_S390_SIGP_SET_PREFIX: |
383d0b05 | 1714 | rc = __inject_set_prefix(vcpu, irq); |
b7e6e4d3 | 1715 | break; |
ba5c1e9b | 1716 | case KVM_S390_SIGP_STOP: |
383d0b05 | 1717 | rc = __inject_sigp_stop(vcpu, irq); |
0146a7b0 | 1718 | break; |
ba5c1e9b | 1719 | case KVM_S390_RESTART: |
383d0b05 | 1720 | rc = __inject_sigp_restart(vcpu, irq); |
0146a7b0 | 1721 | break; |
e029ae5b | 1722 | case KVM_S390_INT_CLOCK_COMP: |
383d0b05 | 1723 | rc = __inject_ckc(vcpu); |
0146a7b0 | 1724 | break; |
e029ae5b | 1725 | case KVM_S390_INT_CPU_TIMER: |
383d0b05 | 1726 | rc = __inject_cpu_timer(vcpu); |
82a12737 | 1727 | break; |
7697e71f | 1728 | case KVM_S390_INT_EXTERNAL_CALL: |
383d0b05 | 1729 | rc = __inject_extcall(vcpu, irq); |
82a12737 | 1730 | break; |
ba5c1e9b | 1731 | case KVM_S390_INT_EMERGENCY: |
383d0b05 | 1732 | rc = __inject_sigp_emergency(vcpu, irq); |
ba5c1e9b | 1733 | break; |
48a3e950 | 1734 | case KVM_S390_MCHK: |
383d0b05 | 1735 | rc = __inject_mchk(vcpu, irq); |
48a3e950 | 1736 | break; |
3c038e6b | 1737 | case KVM_S390_INT_PFAULT_INIT: |
383d0b05 | 1738 | rc = __inject_pfault_init(vcpu, irq); |
3c038e6b | 1739 | break; |
ba5c1e9b CO |
1740 | case KVM_S390_INT_VIRTIO: |
1741 | case KVM_S390_INT_SERVICE: | |
d8346b7d | 1742 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
ba5c1e9b | 1743 | default: |
0146a7b0 | 1744 | rc = -EINVAL; |
ba5c1e9b | 1745 | } |
79e87a10 JF |
1746 | |
1747 | return rc; | |
1748 | } | |
1749 | ||
1750 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) | |
1751 | { | |
1752 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1753 | int rc; | |
1754 | ||
1755 | spin_lock(&li->lock); | |
1756 | rc = do_inject_vcpu(vcpu, irq); | |
4ae3c081 | 1757 | spin_unlock(&li->lock); |
0146a7b0 JF |
1758 | if (!rc) |
1759 | kvm_s390_vcpu_wakeup(vcpu); | |
0146a7b0 | 1760 | return rc; |
ba5c1e9b | 1761 | } |
c05c4186 | 1762 | |
6d3da241 | 1763 | static inline void clear_irq_list(struct list_head *_list) |
c05c4186 | 1764 | { |
6d3da241 | 1765 | struct kvm_s390_interrupt_info *inti, *n; |
c05c4186 | 1766 | |
6d3da241 | 1767 | list_for_each_entry_safe(inti, n, _list, list) { |
c05c4186 JF |
1768 | list_del(&inti->list); |
1769 | kfree(inti); | |
1770 | } | |
c05c4186 JF |
1771 | } |
1772 | ||
94aa033e JF |
1773 | static void inti_to_irq(struct kvm_s390_interrupt_info *inti, |
1774 | struct kvm_s390_irq *irq) | |
c05c4186 | 1775 | { |
94aa033e | 1776 | irq->type = inti->type; |
c05c4186 | 1777 | switch (inti->type) { |
3c038e6b DD |
1778 | case KVM_S390_INT_PFAULT_INIT: |
1779 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 | 1780 | case KVM_S390_INT_VIRTIO: |
94aa033e | 1781 | irq->u.ext = inti->ext; |
c05c4186 JF |
1782 | break; |
1783 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
94aa033e | 1784 | irq->u.io = inti->io; |
c05c4186 | 1785 | break; |
c05c4186 | 1786 | } |
c05c4186 JF |
1787 | } |
1788 | ||
6d3da241 JF |
1789 | void kvm_s390_clear_float_irqs(struct kvm *kvm) |
1790 | { | |
1791 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1792 | int i; | |
1793 | ||
1794 | spin_lock(&fi->lock); | |
f2ae45ed JF |
1795 | fi->pending_irqs = 0; |
1796 | memset(&fi->srv_signal, 0, sizeof(fi->srv_signal)); | |
1797 | memset(&fi->mchk, 0, sizeof(fi->mchk)); | |
6d3da241 JF |
1798 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1799 | clear_irq_list(&fi->lists[i]); | |
1800 | for (i = 0; i < FIRQ_MAX_COUNT; i++) | |
1801 | fi->counters[i] = 0; | |
1802 | spin_unlock(&fi->lock); | |
1803 | }; | |
1804 | ||
94aa033e | 1805 | static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len) |
c05c4186 JF |
1806 | { |
1807 | struct kvm_s390_interrupt_info *inti; | |
1808 | struct kvm_s390_float_interrupt *fi; | |
94aa033e | 1809 | struct kvm_s390_irq *buf; |
6d3da241 | 1810 | struct kvm_s390_irq *irq; |
94aa033e | 1811 | int max_irqs; |
c05c4186 JF |
1812 | int ret = 0; |
1813 | int n = 0; | |
6d3da241 | 1814 | int i; |
c05c4186 | 1815 | |
94aa033e JF |
1816 | if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0) |
1817 | return -EINVAL; | |
1818 | ||
1819 | /* | |
1820 | * We are already using -ENOMEM to signal | |
1821 | * userspace it may retry with a bigger buffer, | |
1822 | * so we need to use something else for this case | |
1823 | */ | |
1824 | buf = vzalloc(len); | |
1825 | if (!buf) | |
1826 | return -ENOBUFS; | |
1827 | ||
1828 | max_irqs = len / sizeof(struct kvm_s390_irq); | |
1829 | ||
c05c4186 JF |
1830 | fi = &kvm->arch.float_int; |
1831 | spin_lock(&fi->lock); | |
6d3da241 JF |
1832 | for (i = 0; i < FIRQ_LIST_COUNT; i++) { |
1833 | list_for_each_entry(inti, &fi->lists[i], list) { | |
1834 | if (n == max_irqs) { | |
1835 | /* signal userspace to try again */ | |
1836 | ret = -ENOMEM; | |
1837 | goto out; | |
1838 | } | |
1839 | inti_to_irq(inti, &buf[n]); | |
1840 | n++; | |
1841 | } | |
1842 | } | |
1843 | if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) { | |
94aa033e | 1844 | if (n == max_irqs) { |
c05c4186 JF |
1845 | /* signal userspace to try again */ |
1846 | ret = -ENOMEM; | |
6d3da241 | 1847 | goto out; |
c05c4186 | 1848 | } |
6d3da241 JF |
1849 | irq = (struct kvm_s390_irq *) &buf[n]; |
1850 | irq->type = KVM_S390_INT_SERVICE; | |
1851 | irq->u.ext = fi->srv_signal; | |
c05c4186 JF |
1852 | n++; |
1853 | } | |
6d3da241 JF |
1854 | if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
1855 | if (n == max_irqs) { | |
1856 | /* signal userspace to try again */ | |
1857 | ret = -ENOMEM; | |
1858 | goto out; | |
1859 | } | |
1860 | irq = (struct kvm_s390_irq *) &buf[n]; | |
1861 | irq->type = KVM_S390_MCHK; | |
1862 | irq->u.mchk = fi->mchk; | |
1863 | n++; | |
1864 | } | |
1865 | ||
1866 | out: | |
c05c4186 | 1867 | spin_unlock(&fi->lock); |
94aa033e JF |
1868 | if (!ret && n > 0) { |
1869 | if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n)) | |
1870 | ret = -EFAULT; | |
1871 | } | |
1872 | vfree(buf); | |
c05c4186 JF |
1873 | |
1874 | return ret < 0 ? ret : n; | |
1875 | } | |
1876 | ||
1877 | static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) | |
1878 | { | |
1879 | int r; | |
1880 | ||
1881 | switch (attr->group) { | |
1882 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
94aa033e | 1883 | r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr, |
c05c4186 JF |
1884 | attr->attr); |
1885 | break; | |
1886 | default: | |
1887 | r = -EINVAL; | |
1888 | } | |
1889 | ||
1890 | return r; | |
1891 | } | |
1892 | ||
1893 | static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, | |
1894 | u64 addr) | |
1895 | { | |
1896 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1897 | void *target = NULL; | |
1898 | void __user *source; | |
1899 | u64 size; | |
1900 | ||
1901 | if (get_user(inti->type, (u64 __user *)addr)) | |
1902 | return -EFAULT; | |
1903 | ||
1904 | switch (inti->type) { | |
3c038e6b DD |
1905 | case KVM_S390_INT_PFAULT_INIT: |
1906 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1907 | case KVM_S390_INT_VIRTIO: |
1908 | case KVM_S390_INT_SERVICE: | |
1909 | target = (void *) &inti->ext; | |
1910 | source = &uptr->u.ext; | |
1911 | size = sizeof(inti->ext); | |
1912 | break; | |
1913 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1914 | target = (void *) &inti->io; | |
1915 | source = &uptr->u.io; | |
1916 | size = sizeof(inti->io); | |
1917 | break; | |
1918 | case KVM_S390_MCHK: | |
1919 | target = (void *) &inti->mchk; | |
1920 | source = &uptr->u.mchk; | |
1921 | size = sizeof(inti->mchk); | |
1922 | break; | |
1923 | default: | |
1924 | return -EINVAL; | |
1925 | } | |
1926 | ||
1927 | if (copy_from_user(target, source, size)) | |
1928 | return -EFAULT; | |
1929 | ||
1930 | return 0; | |
1931 | } | |
1932 | ||
1933 | static int enqueue_floating_irq(struct kvm_device *dev, | |
1934 | struct kvm_device_attr *attr) | |
1935 | { | |
1936 | struct kvm_s390_interrupt_info *inti = NULL; | |
1937 | int r = 0; | |
1938 | int len = attr->attr; | |
1939 | ||
1940 | if (len % sizeof(struct kvm_s390_irq) != 0) | |
1941 | return -EINVAL; | |
1942 | else if (len > KVM_S390_FLIC_MAX_BUFFER) | |
1943 | return -EINVAL; | |
1944 | ||
1945 | while (len >= sizeof(struct kvm_s390_irq)) { | |
1946 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
1947 | if (!inti) | |
1948 | return -ENOMEM; | |
1949 | ||
1950 | r = copy_irq_from_user(inti, attr->addr); | |
1951 | if (r) { | |
1952 | kfree(inti); | |
1953 | return r; | |
1954 | } | |
a91b8ebe JF |
1955 | r = __inject_vm(dev->kvm, inti); |
1956 | if (r) { | |
1957 | kfree(inti); | |
1958 | return r; | |
1959 | } | |
c05c4186 JF |
1960 | len -= sizeof(struct kvm_s390_irq); |
1961 | attr->addr += sizeof(struct kvm_s390_irq); | |
1962 | } | |
1963 | ||
1964 | return r; | |
1965 | } | |
1966 | ||
841b91c5 CH |
1967 | static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
1968 | { | |
1969 | if (id >= MAX_S390_IO_ADAPTERS) | |
1970 | return NULL; | |
1971 | return kvm->arch.adapters[id]; | |
1972 | } | |
1973 | ||
1974 | static int register_io_adapter(struct kvm_device *dev, | |
1975 | struct kvm_device_attr *attr) | |
1976 | { | |
1977 | struct s390_io_adapter *adapter; | |
1978 | struct kvm_s390_io_adapter adapter_info; | |
1979 | ||
1980 | if (copy_from_user(&adapter_info, | |
1981 | (void __user *)attr->addr, sizeof(adapter_info))) | |
1982 | return -EFAULT; | |
1983 | ||
1984 | if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || | |
1985 | (dev->kvm->arch.adapters[adapter_info.id] != NULL)) | |
1986 | return -EINVAL; | |
1987 | ||
1988 | adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); | |
1989 | if (!adapter) | |
1990 | return -ENOMEM; | |
1991 | ||
1992 | INIT_LIST_HEAD(&adapter->maps); | |
1993 | init_rwsem(&adapter->maps_lock); | |
1994 | atomic_set(&adapter->nr_maps, 0); | |
1995 | adapter->id = adapter_info.id; | |
1996 | adapter->isc = adapter_info.isc; | |
1997 | adapter->maskable = adapter_info.maskable; | |
1998 | adapter->masked = false; | |
1999 | adapter->swap = adapter_info.swap; | |
08fab50d FL |
2000 | adapter->suppressible = (adapter_info.flags) & |
2001 | KVM_S390_ADAPTER_SUPPRESSIBLE; | |
841b91c5 CH |
2002 | dev->kvm->arch.adapters[adapter->id] = adapter; |
2003 | ||
2004 | return 0; | |
2005 | } | |
2006 | ||
2007 | int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) | |
2008 | { | |
2009 | int ret; | |
2010 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
2011 | ||
2012 | if (!adapter || !adapter->maskable) | |
2013 | return -EINVAL; | |
2014 | ret = adapter->masked; | |
2015 | adapter->masked = masked; | |
2016 | return ret; | |
2017 | } | |
2018 | ||
2019 | static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) | |
2020 | { | |
2021 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
2022 | struct s390_map_info *map; | |
2023 | int ret; | |
2024 | ||
2025 | if (!adapter || !addr) | |
2026 | return -EINVAL; | |
2027 | ||
2028 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
2029 | if (!map) { | |
2030 | ret = -ENOMEM; | |
2031 | goto out; | |
2032 | } | |
2033 | INIT_LIST_HEAD(&map->list); | |
2034 | map->guest_addr = addr; | |
6e0a0431 | 2035 | map->addr = gmap_translate(kvm->arch.gmap, addr); |
841b91c5 CH |
2036 | if (map->addr == -EFAULT) { |
2037 | ret = -EFAULT; | |
2038 | goto out; | |
2039 | } | |
2040 | ret = get_user_pages_fast(map->addr, 1, 1, &map->page); | |
2041 | if (ret < 0) | |
2042 | goto out; | |
2043 | BUG_ON(ret != 1); | |
2044 | down_write(&adapter->maps_lock); | |
2045 | if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { | |
2046 | list_add_tail(&map->list, &adapter->maps); | |
2047 | ret = 0; | |
2048 | } else { | |
2049 | put_page(map->page); | |
2050 | ret = -EINVAL; | |
2051 | } | |
2052 | up_write(&adapter->maps_lock); | |
2053 | out: | |
2054 | if (ret) | |
2055 | kfree(map); | |
2056 | return ret; | |
2057 | } | |
2058 | ||
2059 | static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) | |
2060 | { | |
2061 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
2062 | struct s390_map_info *map, *tmp; | |
2063 | int found = 0; | |
2064 | ||
2065 | if (!adapter || !addr) | |
2066 | return -EINVAL; | |
2067 | ||
2068 | down_write(&adapter->maps_lock); | |
2069 | list_for_each_entry_safe(map, tmp, &adapter->maps, list) { | |
2070 | if (map->guest_addr == addr) { | |
2071 | found = 1; | |
2072 | atomic_dec(&adapter->nr_maps); | |
2073 | list_del(&map->list); | |
2074 | put_page(map->page); | |
2075 | kfree(map); | |
2076 | break; | |
2077 | } | |
2078 | } | |
2079 | up_write(&adapter->maps_lock); | |
2080 | ||
2081 | return found ? 0 : -EINVAL; | |
2082 | } | |
2083 | ||
2084 | void kvm_s390_destroy_adapters(struct kvm *kvm) | |
2085 | { | |
2086 | int i; | |
2087 | struct s390_map_info *map, *tmp; | |
2088 | ||
2089 | for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { | |
2090 | if (!kvm->arch.adapters[i]) | |
2091 | continue; | |
2092 | list_for_each_entry_safe(map, tmp, | |
2093 | &kvm->arch.adapters[i]->maps, list) { | |
2094 | list_del(&map->list); | |
2095 | put_page(map->page); | |
2096 | kfree(map); | |
2097 | } | |
2098 | kfree(kvm->arch.adapters[i]); | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | static int modify_io_adapter(struct kvm_device *dev, | |
2103 | struct kvm_device_attr *attr) | |
2104 | { | |
2105 | struct kvm_s390_io_adapter_req req; | |
2106 | struct s390_io_adapter *adapter; | |
2107 | int ret; | |
2108 | ||
2109 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
2110 | return -EFAULT; | |
2111 | ||
2112 | adapter = get_io_adapter(dev->kvm, req.id); | |
2113 | if (!adapter) | |
2114 | return -EINVAL; | |
2115 | switch (req.type) { | |
2116 | case KVM_S390_IO_ADAPTER_MASK: | |
2117 | ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); | |
2118 | if (ret > 0) | |
2119 | ret = 0; | |
2120 | break; | |
2121 | case KVM_S390_IO_ADAPTER_MAP: | |
2122 | ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); | |
2123 | break; | |
2124 | case KVM_S390_IO_ADAPTER_UNMAP: | |
2125 | ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); | |
2126 | break; | |
2127 | default: | |
2128 | ret = -EINVAL; | |
2129 | } | |
2130 | ||
2131 | return ret; | |
2132 | } | |
2133 | ||
6d28f789 HP |
2134 | static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr) |
2135 | ||
2136 | { | |
2137 | const u64 isc_mask = 0xffUL << 24; /* all iscs set */ | |
2138 | u32 schid; | |
2139 | ||
2140 | if (attr->flags) | |
2141 | return -EINVAL; | |
2142 | if (attr->attr != sizeof(schid)) | |
2143 | return -EINVAL; | |
2144 | if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid))) | |
2145 | return -EFAULT; | |
2146 | kfree(kvm_s390_get_io_int(kvm, isc_mask, schid)); | |
2147 | /* | |
2148 | * If userspace is conforming to the architecture, we can have at most | |
2149 | * one pending I/O interrupt per subchannel, so this is effectively a | |
2150 | * clear all. | |
2151 | */ | |
2152 | return 0; | |
2153 | } | |
2154 | ||
c05c4186 JF |
2155 | static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
2156 | { | |
2157 | int r = 0; | |
3c038e6b DD |
2158 | unsigned int i; |
2159 | struct kvm_vcpu *vcpu; | |
c05c4186 JF |
2160 | |
2161 | switch (attr->group) { | |
2162 | case KVM_DEV_FLIC_ENQUEUE: | |
2163 | r = enqueue_floating_irq(dev, attr); | |
2164 | break; | |
2165 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
67335e63 | 2166 | kvm_s390_clear_float_irqs(dev->kvm); |
c05c4186 | 2167 | break; |
3c038e6b DD |
2168 | case KVM_DEV_FLIC_APF_ENABLE: |
2169 | dev->kvm->arch.gmap->pfault_enabled = 1; | |
2170 | break; | |
2171 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
2172 | dev->kvm->arch.gmap->pfault_enabled = 0; | |
2173 | /* | |
2174 | * Make sure no async faults are in transition when | |
2175 | * clearing the queues. So we don't need to worry | |
2176 | * about late coming workers. | |
2177 | */ | |
2178 | synchronize_srcu(&dev->kvm->srcu); | |
2179 | kvm_for_each_vcpu(i, vcpu, dev->kvm) | |
2180 | kvm_clear_async_pf_completion_queue(vcpu); | |
2181 | break; | |
841b91c5 CH |
2182 | case KVM_DEV_FLIC_ADAPTER_REGISTER: |
2183 | r = register_io_adapter(dev, attr); | |
2184 | break; | |
2185 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
2186 | r = modify_io_adapter(dev, attr); | |
2187 | break; | |
6d28f789 HP |
2188 | case KVM_DEV_FLIC_CLEAR_IO_IRQ: |
2189 | r = clear_io_irq(dev->kvm, attr); | |
2190 | break; | |
c05c4186 JF |
2191 | default: |
2192 | r = -EINVAL; | |
2193 | } | |
2194 | ||
2195 | return r; | |
2196 | } | |
2197 | ||
4f129858 HP |
2198 | static int flic_has_attr(struct kvm_device *dev, |
2199 | struct kvm_device_attr *attr) | |
2200 | { | |
2201 | switch (attr->group) { | |
2202 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
2203 | case KVM_DEV_FLIC_ENQUEUE: | |
2204 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
2205 | case KVM_DEV_FLIC_APF_ENABLE: | |
2206 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
2207 | case KVM_DEV_FLIC_ADAPTER_REGISTER: | |
2208 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
6d28f789 | 2209 | case KVM_DEV_FLIC_CLEAR_IO_IRQ: |
4f129858 HP |
2210 | return 0; |
2211 | } | |
2212 | return -ENXIO; | |
2213 | } | |
2214 | ||
c05c4186 JF |
2215 | static int flic_create(struct kvm_device *dev, u32 type) |
2216 | { | |
2217 | if (!dev) | |
2218 | return -EINVAL; | |
2219 | if (dev->kvm->arch.flic) | |
2220 | return -EINVAL; | |
2221 | dev->kvm->arch.flic = dev; | |
2222 | return 0; | |
2223 | } | |
2224 | ||
2225 | static void flic_destroy(struct kvm_device *dev) | |
2226 | { | |
2227 | dev->kvm->arch.flic = NULL; | |
2228 | kfree(dev); | |
2229 | } | |
2230 | ||
2231 | /* s390 floating irq controller (flic) */ | |
2232 | struct kvm_device_ops kvm_flic_ops = { | |
2233 | .name = "kvm-flic", | |
2234 | .get_attr = flic_get_attr, | |
2235 | .set_attr = flic_set_attr, | |
4f129858 | 2236 | .has_attr = flic_has_attr, |
c05c4186 JF |
2237 | .create = flic_create, |
2238 | .destroy = flic_destroy, | |
2239 | }; | |
84223598 CH |
2240 | |
2241 | static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) | |
2242 | { | |
2243 | unsigned long bit; | |
2244 | ||
2245 | bit = bit_nr + (addr % PAGE_SIZE) * 8; | |
2246 | ||
2247 | return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; | |
2248 | } | |
2249 | ||
2250 | static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, | |
2251 | u64 addr) | |
2252 | { | |
2253 | struct s390_map_info *map; | |
2254 | ||
2255 | if (!adapter) | |
2256 | return NULL; | |
2257 | ||
2258 | list_for_each_entry(map, &adapter->maps, list) { | |
2259 | if (map->guest_addr == addr) | |
2260 | return map; | |
2261 | } | |
2262 | return NULL; | |
2263 | } | |
2264 | ||
2265 | static int adapter_indicators_set(struct kvm *kvm, | |
2266 | struct s390_io_adapter *adapter, | |
2267 | struct kvm_s390_adapter_int *adapter_int) | |
2268 | { | |
2269 | unsigned long bit; | |
2270 | int summary_set, idx; | |
2271 | struct s390_map_info *info; | |
2272 | void *map; | |
2273 | ||
2274 | info = get_map_info(adapter, adapter_int->ind_addr); | |
2275 | if (!info) | |
2276 | return -1; | |
2277 | map = page_address(info->page); | |
2278 | bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); | |
2279 | set_bit(bit, map); | |
2280 | idx = srcu_read_lock(&kvm->srcu); | |
2281 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2282 | set_page_dirty_lock(info->page); | |
2283 | info = get_map_info(adapter, adapter_int->summary_addr); | |
2284 | if (!info) { | |
2285 | srcu_read_unlock(&kvm->srcu, idx); | |
2286 | return -1; | |
2287 | } | |
2288 | map = page_address(info->page); | |
2289 | bit = get_ind_bit(info->addr, adapter_int->summary_offset, | |
2290 | adapter->swap); | |
2291 | summary_set = test_and_set_bit(bit, map); | |
2292 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2293 | set_page_dirty_lock(info->page); | |
2294 | srcu_read_unlock(&kvm->srcu, idx); | |
2295 | return summary_set ? 0 : 1; | |
2296 | } | |
2297 | ||
2298 | /* | |
2299 | * < 0 - not injected due to error | |
2300 | * = 0 - coalesced, summary indicator already active | |
2301 | * > 0 - injected interrupt | |
2302 | */ | |
2303 | static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, | |
2304 | struct kvm *kvm, int irq_source_id, int level, | |
2305 | bool line_status) | |
2306 | { | |
2307 | int ret; | |
2308 | struct s390_io_adapter *adapter; | |
2309 | ||
2310 | /* We're only interested in the 0->1 transition. */ | |
2311 | if (!level) | |
2312 | return 0; | |
2313 | adapter = get_io_adapter(kvm, e->adapter.adapter_id); | |
2314 | if (!adapter) | |
2315 | return -1; | |
2316 | down_read(&adapter->maps_lock); | |
2317 | ret = adapter_indicators_set(kvm, adapter, &e->adapter); | |
2318 | up_read(&adapter->maps_lock); | |
2319 | if ((ret > 0) && !adapter->masked) { | |
2320 | struct kvm_s390_interrupt s390int = { | |
2321 | .type = KVM_S390_INT_IO(1, 0, 0, 0), | |
2322 | .parm = 0, | |
2323 | .parm64 = (adapter->isc << 27) | 0x80000000, | |
2324 | }; | |
2325 | ret = kvm_s390_inject_vm(kvm, &s390int); | |
2326 | if (ret == 0) | |
2327 | ret = 1; | |
2328 | } | |
2329 | return ret; | |
2330 | } | |
2331 | ||
c63cf538 RK |
2332 | int kvm_set_routing_entry(struct kvm *kvm, |
2333 | struct kvm_kernel_irq_routing_entry *e, | |
84223598 CH |
2334 | const struct kvm_irq_routing_entry *ue) |
2335 | { | |
2336 | int ret; | |
2337 | ||
2338 | switch (ue->type) { | |
2339 | case KVM_IRQ_ROUTING_S390_ADAPTER: | |
2340 | e->set = set_adapter_int; | |
2341 | e->adapter.summary_addr = ue->u.adapter.summary_addr; | |
2342 | e->adapter.ind_addr = ue->u.adapter.ind_addr; | |
2343 | e->adapter.summary_offset = ue->u.adapter.summary_offset; | |
2344 | e->adapter.ind_offset = ue->u.adapter.ind_offset; | |
2345 | e->adapter.adapter_id = ue->u.adapter.adapter_id; | |
2346 | ret = 0; | |
2347 | break; | |
2348 | default: | |
2349 | ret = -EINVAL; | |
2350 | } | |
2351 | ||
2352 | return ret; | |
2353 | } | |
2354 | ||
2355 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, | |
2356 | int irq_source_id, int level, bool line_status) | |
2357 | { | |
2358 | return -EINVAL; | |
2359 | } | |
816c7667 JF |
2360 | |
2361 | int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len) | |
2362 | { | |
2363 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2364 | struct kvm_s390_irq *buf; | |
2365 | int r = 0; | |
2366 | int n; | |
2367 | ||
2368 | buf = vmalloc(len); | |
2369 | if (!buf) | |
2370 | return -ENOMEM; | |
2371 | ||
2372 | if (copy_from_user((void *) buf, irqstate, len)) { | |
2373 | r = -EFAULT; | |
2374 | goto out_free; | |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * Don't allow setting the interrupt state | |
2379 | * when there are already interrupts pending | |
2380 | */ | |
2381 | spin_lock(&li->lock); | |
2382 | if (li->pending_irqs) { | |
2383 | r = -EBUSY; | |
2384 | goto out_unlock; | |
2385 | } | |
2386 | ||
2387 | for (n = 0; n < len / sizeof(*buf); n++) { | |
2388 | r = do_inject_vcpu(vcpu, &buf[n]); | |
2389 | if (r) | |
2390 | break; | |
2391 | } | |
2392 | ||
2393 | out_unlock: | |
2394 | spin_unlock(&li->lock); | |
2395 | out_free: | |
2396 | vfree(buf); | |
2397 | ||
2398 | return r; | |
2399 | } | |
2400 | ||
2401 | static void store_local_irq(struct kvm_s390_local_interrupt *li, | |
2402 | struct kvm_s390_irq *irq, | |
2403 | unsigned long irq_type) | |
2404 | { | |
2405 | switch (irq_type) { | |
2406 | case IRQ_PEND_MCHK_EX: | |
2407 | case IRQ_PEND_MCHK_REP: | |
2408 | irq->type = KVM_S390_MCHK; | |
2409 | irq->u.mchk = li->irq.mchk; | |
2410 | break; | |
2411 | case IRQ_PEND_PROG: | |
2412 | irq->type = KVM_S390_PROGRAM_INT; | |
2413 | irq->u.pgm = li->irq.pgm; | |
2414 | break; | |
2415 | case IRQ_PEND_PFAULT_INIT: | |
2416 | irq->type = KVM_S390_INT_PFAULT_INIT; | |
2417 | irq->u.ext = li->irq.ext; | |
2418 | break; | |
2419 | case IRQ_PEND_EXT_EXTERNAL: | |
2420 | irq->type = KVM_S390_INT_EXTERNAL_CALL; | |
2421 | irq->u.extcall = li->irq.extcall; | |
2422 | break; | |
2423 | case IRQ_PEND_EXT_CLOCK_COMP: | |
2424 | irq->type = KVM_S390_INT_CLOCK_COMP; | |
2425 | break; | |
2426 | case IRQ_PEND_EXT_CPU_TIMER: | |
2427 | irq->type = KVM_S390_INT_CPU_TIMER; | |
2428 | break; | |
2429 | case IRQ_PEND_SIGP_STOP: | |
2430 | irq->type = KVM_S390_SIGP_STOP; | |
2431 | irq->u.stop = li->irq.stop; | |
2432 | break; | |
2433 | case IRQ_PEND_RESTART: | |
2434 | irq->type = KVM_S390_RESTART; | |
2435 | break; | |
2436 | case IRQ_PEND_SET_PREFIX: | |
2437 | irq->type = KVM_S390_SIGP_SET_PREFIX; | |
2438 | irq->u.prefix = li->irq.prefix; | |
2439 | break; | |
2440 | } | |
2441 | } | |
2442 | ||
2443 | int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len) | |
2444 | { | |
a5bd7647 | 2445 | int scn; |
816c7667 JF |
2446 | unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)]; |
2447 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2448 | unsigned long pending_irqs; | |
2449 | struct kvm_s390_irq irq; | |
2450 | unsigned long irq_type; | |
2451 | int cpuaddr; | |
2452 | int n = 0; | |
2453 | ||
2454 | spin_lock(&li->lock); | |
2455 | pending_irqs = li->pending_irqs; | |
2456 | memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending, | |
2457 | sizeof(sigp_emerg_pending)); | |
2458 | spin_unlock(&li->lock); | |
2459 | ||
2460 | for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) { | |
2461 | memset(&irq, 0, sizeof(irq)); | |
2462 | if (irq_type == IRQ_PEND_EXT_EMERGENCY) | |
2463 | continue; | |
2464 | if (n + sizeof(irq) > len) | |
2465 | return -ENOBUFS; | |
2466 | store_local_irq(&vcpu->arch.local_int, &irq, irq_type); | |
2467 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2468 | return -EFAULT; | |
2469 | n += sizeof(irq); | |
2470 | } | |
2471 | ||
2472 | if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) { | |
2473 | for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) { | |
2474 | memset(&irq, 0, sizeof(irq)); | |
2475 | if (n + sizeof(irq) > len) | |
2476 | return -ENOBUFS; | |
2477 | irq.type = KVM_S390_INT_EMERGENCY; | |
2478 | irq.u.emerg.code = cpuaddr; | |
2479 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2480 | return -EFAULT; | |
2481 | n += sizeof(irq); | |
2482 | } | |
2483 | } | |
2484 | ||
a5bd7647 | 2485 | if (sca_ext_call_pending(vcpu, &scn)) { |
816c7667 JF |
2486 | if (n + sizeof(irq) > len) |
2487 | return -ENOBUFS; | |
2488 | memset(&irq, 0, sizeof(irq)); | |
2489 | irq.type = KVM_S390_INT_EXTERNAL_CALL; | |
a5bd7647 | 2490 | irq.u.extcall.code = scn; |
816c7667 JF |
2491 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) |
2492 | return -EFAULT; | |
2493 | n += sizeof(irq); | |
2494 | } | |
2495 | ||
2496 | return n; | |
2497 | } |