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Commit | Line | Data |
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ba5c1e9b | 1 | /* |
a53c8fab | 2 | * handling kvm guest interrupts |
ba5c1e9b | 3 | * |
33b412ac | 4 | * Copyright IBM Corp. 2008, 2015 |
ba5c1e9b CO |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | */ | |
12 | ||
ca872302 | 13 | #include <linux/interrupt.h> |
ba5c1e9b | 14 | #include <linux/kvm_host.h> |
cbb870c8 | 15 | #include <linux/hrtimer.h> |
84223598 | 16 | #include <linux/mmu_context.h> |
3cd61299 | 17 | #include <linux/signal.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
383d0b05 | 19 | #include <linux/bitmap.h> |
94aa033e | 20 | #include <linux/vmalloc.h> |
cbb870c8 | 21 | #include <asm/asm-offsets.h> |
33b412ac | 22 | #include <asm/dis.h> |
cbb870c8 | 23 | #include <asm/uaccess.h> |
ea5f4969 | 24 | #include <asm/sclp.h> |
6d3da241 | 25 | #include <asm/isc.h> |
ba5c1e9b CO |
26 | #include "kvm-s390.h" |
27 | #include "gaccess.h" | |
ade38c31 | 28 | #include "trace-s390.h" |
ba5c1e9b | 29 | |
d8346b7d CH |
30 | #define IOINT_SCHID_MASK 0x0000ffff |
31 | #define IOINT_SSID_MASK 0x00030000 | |
32 | #define IOINT_CSSID_MASK 0x03fc0000 | |
44c6ca3d | 33 | #define PFAULT_INIT 0x0600 |
60f90a14 JF |
34 | #define PFAULT_DONE 0x0680 |
35 | #define VIRTIO_PARAM 0x0d00 | |
d8346b7d | 36 | |
3c038e6b | 37 | int psw_extint_disabled(struct kvm_vcpu *vcpu) |
ba5c1e9b CO |
38 | { |
39 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
40 | } | |
41 | ||
d8346b7d CH |
42 | static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
43 | { | |
44 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); | |
45 | } | |
46 | ||
48a3e950 CH |
47 | static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
48 | { | |
49 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); | |
50 | } | |
51 | ||
ba5c1e9b CO |
52 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
53 | { | |
fee0e0fd DH |
54 | return psw_extint_disabled(vcpu) && |
55 | psw_ioint_disabled(vcpu) && | |
56 | psw_mchk_disabled(vcpu); | |
ba5c1e9b CO |
57 | } |
58 | ||
bb78c5ec DH |
59 | static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
60 | { | |
61 | if (psw_extint_disabled(vcpu) || | |
62 | !(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
63 | return 0; | |
f71d0dc5 DH |
64 | if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
65 | /* No timer interrupts when single stepping */ | |
66 | return 0; | |
bb78c5ec DH |
67 | return 1; |
68 | } | |
69 | ||
b4aec925 DH |
70 | static int ckc_irq_pending(struct kvm_vcpu *vcpu) |
71 | { | |
fdf03650 | 72 | preempt_disable(); |
b4aec925 | 73 | if (!(vcpu->arch.sie_block->ckc < |
fdf03650 FZ |
74 | get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) { |
75 | preempt_enable(); | |
b4aec925 | 76 | return 0; |
fdf03650 FZ |
77 | } |
78 | preempt_enable(); | |
b4aec925 DH |
79 | return ckc_interrupts_enabled(vcpu); |
80 | } | |
81 | ||
82 | static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu) | |
83 | { | |
84 | return !psw_extint_disabled(vcpu) && | |
85 | (vcpu->arch.sie_block->gcr[0] & 0x400ul); | |
86 | } | |
87 | ||
88 | static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu) | |
89 | { | |
90 | return (vcpu->arch.sie_block->cputm >> 63) && | |
91 | cpu_timer_interrupts_enabled(vcpu); | |
92 | } | |
93 | ||
6d3da241 | 94 | static inline int is_ioirq(unsigned long irq_type) |
79fd50c6 | 95 | { |
6d3da241 JF |
96 | return ((irq_type >= IRQ_PEND_IO_ISC_0) && |
97 | (irq_type <= IRQ_PEND_IO_ISC_7)); | |
98 | } | |
79fd50c6 | 99 | |
6d3da241 JF |
100 | static uint64_t isc_to_isc_bits(int isc) |
101 | { | |
79fd50c6 CH |
102 | return (0x80 >> isc) << 24; |
103 | } | |
104 | ||
6d3da241 | 105 | static inline u8 int_word_to_isc(u32 int_word) |
ba5c1e9b | 106 | { |
6d3da241 JF |
107 | return (int_word & 0x38000000) >> 27; |
108 | } | |
109 | ||
5f94c58e | 110 | static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) |
6d3da241 | 111 | { |
5f94c58e DH |
112 | return vcpu->kvm->arch.float_int.pending_irqs | |
113 | vcpu->arch.local_int.pending_irqs; | |
383d0b05 JF |
114 | } |
115 | ||
6d3da241 JF |
116 | static unsigned long disable_iscs(struct kvm_vcpu *vcpu, |
117 | unsigned long active_mask) | |
118 | { | |
119 | int i; | |
120 | ||
121 | for (i = 0; i <= MAX_ISC; i++) | |
122 | if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i))) | |
123 | active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i)); | |
124 | ||
125 | return active_mask; | |
126 | } | |
127 | ||
128 | static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu) | |
383d0b05 | 129 | { |
6d3da241 JF |
130 | unsigned long active_mask; |
131 | ||
5f94c58e | 132 | active_mask = pending_irqs(vcpu); |
ffeca0ae JF |
133 | if (!active_mask) |
134 | return 0; | |
383d0b05 JF |
135 | |
136 | if (psw_extint_disabled(vcpu)) | |
137 | active_mask &= ~IRQ_PEND_EXT_MASK; | |
6d3da241 JF |
138 | if (psw_ioint_disabled(vcpu)) |
139 | active_mask &= ~IRQ_PEND_IO_MASK; | |
140 | else | |
141 | active_mask = disable_iscs(vcpu, active_mask); | |
383d0b05 JF |
142 | if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul)) |
143 | __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask); | |
144 | if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul)) | |
145 | __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask); | |
146 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
147 | __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask); | |
148 | if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul)) | |
149 | __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask); | |
6d3da241 JF |
150 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) |
151 | __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask); | |
383d0b05 JF |
152 | if (psw_mchk_disabled(vcpu)) |
153 | active_mask &= ~IRQ_PEND_MCHK_MASK; | |
6d3da241 JF |
154 | if (!(vcpu->arch.sie_block->gcr[14] & |
155 | vcpu->kvm->arch.float_int.mchk.cr14)) | |
156 | __clear_bit(IRQ_PEND_MCHK_REP, &active_mask); | |
383d0b05 | 157 | |
6cddd432 DH |
158 | /* |
159 | * STOP irqs will never be actively delivered. They are triggered via | |
160 | * intercept requests and cleared when the stop intercept is performed. | |
161 | */ | |
162 | __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask); | |
163 | ||
383d0b05 JF |
164 | return active_mask; |
165 | } | |
166 | ||
ba5c1e9b CO |
167 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
168 | { | |
805de8f4 | 169 | atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
170 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); |
171 | } | |
172 | ||
173 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
174 | { | |
805de8f4 | 175 | atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
176 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); |
177 | } | |
178 | ||
179 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
180 | { | |
805de8f4 PZ |
181 | atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, |
182 | &vcpu->arch.sie_block->cpuflags); | |
ba5c1e9b | 183 | vcpu->arch.sie_block->lctl = 0x0000; |
27291e21 DH |
184 | vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
185 | ||
186 | if (guestdbg_enabled(vcpu)) { | |
187 | vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | | |
188 | LCTL_CR10 | LCTL_CR11); | |
189 | vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); | |
190 | } | |
ba5c1e9b CO |
191 | } |
192 | ||
193 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
194 | { | |
805de8f4 | 195 | atomic_or(flag, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
196 | } |
197 | ||
6d3da241 JF |
198 | static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) |
199 | { | |
5f94c58e | 200 | if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK)) |
6d3da241 JF |
201 | return; |
202 | else if (psw_ioint_disabled(vcpu)) | |
203 | __set_cpuflag(vcpu, CPUSTAT_IO_INT); | |
204 | else | |
205 | vcpu->arch.sie_block->lctl |= LCTL_CR6; | |
206 | } | |
207 | ||
383d0b05 JF |
208 | static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) |
209 | { | |
5f94c58e | 210 | if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK)) |
383d0b05 JF |
211 | return; |
212 | if (psw_extint_disabled(vcpu)) | |
213 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
214 | else | |
215 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
216 | } | |
217 | ||
218 | static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) | |
219 | { | |
5f94c58e | 220 | if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK)) |
383d0b05 JF |
221 | return; |
222 | if (psw_mchk_disabled(vcpu)) | |
223 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
224 | else | |
225 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
226 | } | |
227 | ||
6cddd432 DH |
228 | static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu) |
229 | { | |
230 | if (kvm_s390_is_stop_irq_pending(vcpu)) | |
231 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
232 | } | |
233 | ||
6d3da241 JF |
234 | /* Set interception request for non-deliverable interrupts */ |
235 | static void set_intercept_indicators(struct kvm_vcpu *vcpu) | |
383d0b05 | 236 | { |
6d3da241 | 237 | set_intercept_indicators_io(vcpu); |
383d0b05 JF |
238 | set_intercept_indicators_ext(vcpu); |
239 | set_intercept_indicators_mchk(vcpu); | |
6cddd432 | 240 | set_intercept_indicators_stop(vcpu); |
383d0b05 JF |
241 | } |
242 | ||
8a2ef71b JF |
243 | static u16 get_ilc(struct kvm_vcpu *vcpu) |
244 | { | |
8a2ef71b JF |
245 | switch (vcpu->arch.sie_block->icptcode) { |
246 | case ICPT_INST: | |
247 | case ICPT_INSTPROGI: | |
248 | case ICPT_OPEREXC: | |
249 | case ICPT_PARTEXEC: | |
250 | case ICPT_IOINST: | |
251 | /* last instruction only stored for these icptcodes */ | |
33b412ac | 252 | return insn_length(vcpu->arch.sie_block->ipa >> 8); |
8a2ef71b JF |
253 | case ICPT_PROGI: |
254 | return vcpu->arch.sie_block->pgmilc; | |
255 | default: | |
256 | return 0; | |
257 | } | |
258 | } | |
259 | ||
0fb97abe JF |
260 | static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) |
261 | { | |
383d0b05 | 262 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
263 | int rc; |
264 | ||
265 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, | |
266 | 0, 0); | |
267 | ||
268 | rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, | |
269 | (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 270 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
271 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
272 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
273 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
274 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 275 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
99e20009 | 276 | return rc ? -EFAULT : 0; |
0fb97abe JF |
277 | } |
278 | ||
279 | static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) | |
280 | { | |
383d0b05 | 281 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
282 | int rc; |
283 | ||
284 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, | |
285 | 0, 0); | |
286 | ||
287 | rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP, | |
288 | (u16 __user *)__LC_EXT_INT_CODE); | |
467fc298 | 289 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
290 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
291 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
292 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
293 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 294 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
99e20009 | 295 | return rc ? -EFAULT : 0; |
0fb97abe JF |
296 | } |
297 | ||
383d0b05 | 298 | static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) |
0fb97abe | 299 | { |
383d0b05 JF |
300 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
301 | struct kvm_s390_ext_info ext; | |
0fb97abe JF |
302 | int rc; |
303 | ||
383d0b05 JF |
304 | spin_lock(&li->lock); |
305 | ext = li->irq.ext; | |
306 | clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
307 | li->irq.ext.ext_params2 = 0; | |
308 | spin_unlock(&li->lock); | |
309 | ||
3f24ba15 CB |
310 | VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx", |
311 | ext.ext_params2); | |
0fb97abe JF |
312 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
313 | KVM_S390_INT_PFAULT_INIT, | |
383d0b05 | 314 | 0, ext.ext_params2); |
0fb97abe JF |
315 | |
316 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE); | |
317 | rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); | |
318 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
319 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
320 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
321 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 322 | rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); |
99e20009 | 323 | return rc ? -EFAULT : 0; |
0fb97abe JF |
324 | } |
325 | ||
383d0b05 | 326 | static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) |
0fb97abe | 327 | { |
6d3da241 | 328 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
383d0b05 | 329 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
6d3da241 | 330 | struct kvm_s390_mchk_info mchk = {}; |
bc17de7c | 331 | unsigned long adtl_status_addr; |
6d3da241 JF |
332 | int deliver = 0; |
333 | int rc = 0; | |
0fb97abe | 334 | |
6d3da241 | 335 | spin_lock(&fi->lock); |
383d0b05 | 336 | spin_lock(&li->lock); |
6d3da241 JF |
337 | if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) || |
338 | test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) { | |
339 | /* | |
340 | * If there was an exigent machine check pending, then any | |
341 | * repressible machine checks that might have been pending | |
342 | * are indicated along with it, so always clear bits for | |
343 | * repressible and exigent interrupts | |
344 | */ | |
345 | mchk = li->irq.mchk; | |
346 | clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
347 | clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
348 | memset(&li->irq.mchk, 0, sizeof(mchk)); | |
349 | deliver = 1; | |
350 | } | |
383d0b05 | 351 | /* |
6d3da241 JF |
352 | * We indicate floating repressible conditions along with |
353 | * other pending conditions. Channel Report Pending and Channel | |
354 | * Subsystem damage are the only two and and are indicated by | |
355 | * bits in mcic and masked in cr14. | |
383d0b05 | 356 | */ |
6d3da241 JF |
357 | if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
358 | mchk.mcic |= fi->mchk.mcic; | |
359 | mchk.cr14 |= fi->mchk.cr14; | |
360 | memset(&fi->mchk, 0, sizeof(mchk)); | |
361 | deliver = 1; | |
362 | } | |
383d0b05 | 363 | spin_unlock(&li->lock); |
6d3da241 | 364 | spin_unlock(&fi->lock); |
383d0b05 | 365 | |
6d3da241 | 366 | if (deliver) { |
3f24ba15 | 367 | VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx", |
6d3da241 JF |
368 | mchk.mcic); |
369 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
370 | KVM_S390_MCHK, | |
371 | mchk.cr14, mchk.mcic); | |
372 | ||
373 | rc = kvm_s390_vcpu_store_status(vcpu, | |
374 | KVM_S390_STORE_STATUS_PREFIXED); | |
375 | rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR, | |
376 | &adtl_status_addr, | |
377 | sizeof(unsigned long)); | |
378 | rc |= kvm_s390_vcpu_store_adtl_status(vcpu, | |
379 | adtl_status_addr); | |
380 | rc |= put_guest_lc(vcpu, mchk.mcic, | |
381 | (u64 __user *) __LC_MCCK_CODE); | |
382 | rc |= put_guest_lc(vcpu, mchk.failing_storage_address, | |
383 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); | |
384 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, | |
385 | &mchk.fixed_logout, | |
386 | sizeof(mchk.fixed_logout)); | |
387 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, | |
388 | &vcpu->arch.sie_block->gpsw, | |
389 | sizeof(psw_t)); | |
390 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
391 | &vcpu->arch.sie_block->gpsw, | |
392 | sizeof(psw_t)); | |
393 | } | |
99e20009 | 394 | return rc ? -EFAULT : 0; |
0fb97abe JF |
395 | } |
396 | ||
397 | static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) | |
398 | { | |
383d0b05 | 399 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
400 | int rc; |
401 | ||
3f24ba15 | 402 | VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart"); |
0fb97abe JF |
403 | vcpu->stat.deliver_restart_signal++; |
404 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); | |
405 | ||
406 | rc = write_guest_lc(vcpu, | |
407 | offsetof(struct _lowcore, restart_old_psw), | |
408 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
409 | rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw), | |
410 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 411 | clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
99e20009 | 412 | return rc ? -EFAULT : 0; |
0fb97abe JF |
413 | } |
414 | ||
383d0b05 | 415 | static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) |
0fb97abe | 416 | { |
383d0b05 JF |
417 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
418 | struct kvm_s390_prefix_info prefix; | |
419 | ||
420 | spin_lock(&li->lock); | |
421 | prefix = li->irq.prefix; | |
422 | li->irq.prefix.address = 0; | |
423 | clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
424 | spin_unlock(&li->lock); | |
0fb97abe | 425 | |
0fb97abe JF |
426 | vcpu->stat.deliver_prefix_signal++; |
427 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
428 | KVM_S390_SIGP_SET_PREFIX, | |
383d0b05 | 429 | prefix.address, 0); |
0fb97abe | 430 | |
383d0b05 | 431 | kvm_s390_set_prefix(vcpu, prefix.address); |
0fb97abe JF |
432 | return 0; |
433 | } | |
434 | ||
383d0b05 | 435 | static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) |
0fb97abe | 436 | { |
383d0b05 | 437 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe | 438 | int rc; |
383d0b05 JF |
439 | int cpu_addr; |
440 | ||
441 | spin_lock(&li->lock); | |
442 | cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
443 | clear_bit(cpu_addr, li->sigp_emerg_pending); | |
444 | if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) | |
445 | clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); | |
446 | spin_unlock(&li->lock); | |
0fb97abe | 447 | |
3f24ba15 | 448 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg"); |
0fb97abe | 449 | vcpu->stat.deliver_emergency_signal++; |
383d0b05 JF |
450 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
451 | cpu_addr, 0); | |
0fb97abe JF |
452 | |
453 | rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, | |
454 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 455 | rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
456 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
457 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
458 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
459 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 460 | return rc ? -EFAULT : 0; |
0fb97abe JF |
461 | } |
462 | ||
383d0b05 | 463 | static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) |
0fb97abe | 464 | { |
383d0b05 JF |
465 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
466 | struct kvm_s390_extcall_info extcall; | |
0fb97abe JF |
467 | int rc; |
468 | ||
383d0b05 JF |
469 | spin_lock(&li->lock); |
470 | extcall = li->irq.extcall; | |
471 | li->irq.extcall.code = 0; | |
472 | clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
473 | spin_unlock(&li->lock); | |
474 | ||
3f24ba15 | 475 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call"); |
0fb97abe JF |
476 | vcpu->stat.deliver_external_call++; |
477 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
478 | KVM_S390_INT_EXTERNAL_CALL, | |
383d0b05 | 479 | extcall.code, 0); |
0fb97abe JF |
480 | |
481 | rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, | |
482 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 483 | rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
484 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
485 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
486 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, | |
487 | sizeof(psw_t)); | |
99e20009 | 488 | return rc ? -EFAULT : 0; |
0fb97abe JF |
489 | } |
490 | ||
383d0b05 | 491 | static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) |
8712836b | 492 | { |
383d0b05 JF |
493 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
494 | struct kvm_s390_pgm_info pgm_info; | |
a9a846fd | 495 | int rc = 0, nullifying = false; |
8a2ef71b | 496 | u16 ilc = get_ilc(vcpu); |
8712836b | 497 | |
383d0b05 JF |
498 | spin_lock(&li->lock); |
499 | pgm_info = li->irq.pgm; | |
500 | clear_bit(IRQ_PEND_PROG, &li->pending_irqs); | |
501 | memset(&li->irq.pgm, 0, sizeof(pgm_info)); | |
502 | spin_unlock(&li->lock); | |
503 | ||
3f24ba15 | 504 | VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilc:%d", |
383d0b05 | 505 | pgm_info.code, ilc); |
0fb97abe JF |
506 | vcpu->stat.deliver_program_int++; |
507 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
383d0b05 | 508 | pgm_info.code, 0); |
0fb97abe | 509 | |
383d0b05 | 510 | switch (pgm_info.code & ~PGM_PER) { |
8712836b DH |
511 | case PGM_AFX_TRANSLATION: |
512 | case PGM_ASX_TRANSLATION: | |
513 | case PGM_EX_TRANSLATION: | |
514 | case PGM_LFX_TRANSLATION: | |
515 | case PGM_LSTE_SEQUENCE: | |
516 | case PGM_LSX_TRANSLATION: | |
517 | case PGM_LX_TRANSLATION: | |
518 | case PGM_PRIMARY_AUTHORITY: | |
519 | case PGM_SECONDARY_AUTHORITY: | |
a9a846fd TH |
520 | nullifying = true; |
521 | /* fall through */ | |
8712836b | 522 | case PGM_SPACE_SWITCH: |
383d0b05 | 523 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b DH |
524 | (u64 *)__LC_TRANS_EXC_CODE); |
525 | break; | |
526 | case PGM_ALEN_TRANSLATION: | |
527 | case PGM_ALE_SEQUENCE: | |
528 | case PGM_ASTE_INSTANCE: | |
529 | case PGM_ASTE_SEQUENCE: | |
530 | case PGM_ASTE_VALIDITY: | |
531 | case PGM_EXTENDED_AUTHORITY: | |
383d0b05 | 532 | rc = put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 533 | (u8 *)__LC_EXC_ACCESS_ID); |
a9a846fd | 534 | nullifying = true; |
8712836b DH |
535 | break; |
536 | case PGM_ASCE_TYPE: | |
537 | case PGM_PAGE_TRANSLATION: | |
538 | case PGM_REGION_FIRST_TRANS: | |
539 | case PGM_REGION_SECOND_TRANS: | |
540 | case PGM_REGION_THIRD_TRANS: | |
541 | case PGM_SEGMENT_TRANSLATION: | |
383d0b05 | 542 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 543 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 544 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 545 | (u8 *)__LC_EXC_ACCESS_ID); |
383d0b05 | 546 | rc |= put_guest_lc(vcpu, pgm_info.op_access_id, |
8712836b | 547 | (u8 *)__LC_OP_ACCESS_ID); |
a9a846fd | 548 | nullifying = true; |
8712836b DH |
549 | break; |
550 | case PGM_MONITOR: | |
383d0b05 | 551 | rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, |
a36c5393 | 552 | (u16 *)__LC_MON_CLASS_NR); |
383d0b05 | 553 | rc |= put_guest_lc(vcpu, pgm_info.mon_code, |
8712836b DH |
554 | (u64 *)__LC_MON_CODE); |
555 | break; | |
403c8648 | 556 | case PGM_VECTOR_PROCESSING: |
8712836b | 557 | case PGM_DATA: |
383d0b05 | 558 | rc = put_guest_lc(vcpu, pgm_info.data_exc_code, |
8712836b DH |
559 | (u32 *)__LC_DATA_EXC_CODE); |
560 | break; | |
561 | case PGM_PROTECTION: | |
383d0b05 | 562 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 563 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 564 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b DH |
565 | (u8 *)__LC_EXC_ACCESS_ID); |
566 | break; | |
a9a846fd TH |
567 | case PGM_STACK_FULL: |
568 | case PGM_STACK_EMPTY: | |
569 | case PGM_STACK_SPECIFICATION: | |
570 | case PGM_STACK_TYPE: | |
571 | case PGM_STACK_OPERATION: | |
572 | case PGM_TRACE_TABEL: | |
573 | case PGM_CRYPTO_OPERATION: | |
574 | nullifying = true; | |
575 | break; | |
8712836b DH |
576 | } |
577 | ||
383d0b05 JF |
578 | if (pgm_info.code & PGM_PER) { |
579 | rc |= put_guest_lc(vcpu, pgm_info.per_code, | |
8712836b | 580 | (u8 *) __LC_PER_CODE); |
383d0b05 | 581 | rc |= put_guest_lc(vcpu, pgm_info.per_atmid, |
8712836b | 582 | (u8 *)__LC_PER_ATMID); |
383d0b05 | 583 | rc |= put_guest_lc(vcpu, pgm_info.per_address, |
8712836b | 584 | (u64 *) __LC_PER_ADDRESS); |
383d0b05 | 585 | rc |= put_guest_lc(vcpu, pgm_info.per_access_id, |
8712836b DH |
586 | (u8 *) __LC_PER_ACCESS_ID); |
587 | } | |
588 | ||
a9a846fd TH |
589 | if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST) |
590 | kvm_s390_rewind_psw(vcpu, ilc); | |
591 | ||
8a2ef71b | 592 | rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC); |
2ba45968 DH |
593 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea, |
594 | (u64 *) __LC_LAST_BREAK); | |
383d0b05 | 595 | rc |= put_guest_lc(vcpu, pgm_info.code, |
8712836b DH |
596 | (u16 *)__LC_PGM_INT_CODE); |
597 | rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, | |
598 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
599 | rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, | |
600 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 601 | return rc ? -EFAULT : 0; |
0fb97abe JF |
602 | } |
603 | ||
6d3da241 | 604 | static int __must_check __deliver_service(struct kvm_vcpu *vcpu) |
0fb97abe | 605 | { |
6d3da241 JF |
606 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
607 | struct kvm_s390_ext_info ext; | |
608 | int rc = 0; | |
609 | ||
610 | spin_lock(&fi->lock); | |
611 | if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) { | |
612 | spin_unlock(&fi->lock); | |
613 | return 0; | |
614 | } | |
615 | ext = fi->srv_signal; | |
616 | memset(&fi->srv_signal, 0, sizeof(ext)); | |
617 | clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
618 | spin_unlock(&fi->lock); | |
0fb97abe | 619 | |
3f24ba15 | 620 | VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x", |
6d3da241 | 621 | ext.ext_params); |
0fb97abe | 622 | vcpu->stat.deliver_service_signal++; |
6d3da241 JF |
623 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, |
624 | ext.ext_params, 0); | |
0fb97abe JF |
625 | |
626 | rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 627 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
628 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
629 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
630 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
631 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
6d3da241 | 632 | rc |= put_guest_lc(vcpu, ext.ext_params, |
0fb97abe | 633 | (u32 *)__LC_EXT_PARAMS); |
6d3da241 | 634 | |
99e20009 | 635 | return rc ? -EFAULT : 0; |
0fb97abe JF |
636 | } |
637 | ||
6d3da241 | 638 | static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu) |
0fb97abe | 639 | { |
6d3da241 JF |
640 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
641 | struct kvm_s390_interrupt_info *inti; | |
642 | int rc = 0; | |
0fb97abe | 643 | |
6d3da241 JF |
644 | spin_lock(&fi->lock); |
645 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT], | |
646 | struct kvm_s390_interrupt_info, | |
647 | list); | |
648 | if (inti) { | |
6d3da241 JF |
649 | list_del(&inti->list); |
650 | fi->counters[FIRQ_CNTR_PFAULT] -= 1; | |
651 | } | |
652 | if (list_empty(&fi->lists[FIRQ_LIST_PFAULT])) | |
653 | clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
654 | spin_unlock(&fi->lock); | |
8712836b | 655 | |
6d3da241 | 656 | if (inti) { |
3f24ba15 CB |
657 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
658 | KVM_S390_INT_PFAULT_DONE, 0, | |
659 | inti->ext.ext_params2); | |
660 | VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx", | |
661 | inti->ext.ext_params2); | |
662 | ||
6d3da241 JF |
663 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, |
664 | (u16 *)__LC_EXT_INT_CODE); | |
665 | rc |= put_guest_lc(vcpu, PFAULT_DONE, | |
666 | (u16 *)__LC_EXT_CPU_ADDR); | |
667 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
668 | &vcpu->arch.sie_block->gpsw, | |
669 | sizeof(psw_t)); | |
670 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
671 | &vcpu->arch.sie_block->gpsw, | |
672 | sizeof(psw_t)); | |
673 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
674 | (u64 *)__LC_EXT_PARAMS2); | |
675 | kfree(inti); | |
676 | } | |
99e20009 | 677 | return rc ? -EFAULT : 0; |
0fb97abe JF |
678 | } |
679 | ||
6d3da241 | 680 | static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu) |
0fb97abe | 681 | { |
6d3da241 JF |
682 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
683 | struct kvm_s390_interrupt_info *inti; | |
684 | int rc = 0; | |
0fb97abe | 685 | |
6d3da241 JF |
686 | spin_lock(&fi->lock); |
687 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO], | |
688 | struct kvm_s390_interrupt_info, | |
689 | list); | |
690 | if (inti) { | |
691 | VCPU_EVENT(vcpu, 4, | |
3f24ba15 | 692 | "deliver: virtio parm: 0x%x,parm64: 0x%llx", |
6d3da241 JF |
693 | inti->ext.ext_params, inti->ext.ext_params2); |
694 | vcpu->stat.deliver_virtio_interrupt++; | |
695 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
696 | inti->type, | |
697 | inti->ext.ext_params, | |
698 | inti->ext.ext_params2); | |
699 | list_del(&inti->list); | |
700 | fi->counters[FIRQ_CNTR_VIRTIO] -= 1; | |
701 | } | |
702 | if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO])) | |
703 | clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
704 | spin_unlock(&fi->lock); | |
0fb97abe | 705 | |
6d3da241 JF |
706 | if (inti) { |
707 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, | |
708 | (u16 *)__LC_EXT_INT_CODE); | |
709 | rc |= put_guest_lc(vcpu, VIRTIO_PARAM, | |
710 | (u16 *)__LC_EXT_CPU_ADDR); | |
711 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
712 | &vcpu->arch.sie_block->gpsw, | |
713 | sizeof(psw_t)); | |
714 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
715 | &vcpu->arch.sie_block->gpsw, | |
716 | sizeof(psw_t)); | |
717 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
718 | (u32 *)__LC_EXT_PARAMS); | |
719 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
720 | (u64 *)__LC_EXT_PARAMS2); | |
721 | kfree(inti); | |
722 | } | |
99e20009 | 723 | return rc ? -EFAULT : 0; |
0fb97abe JF |
724 | } |
725 | ||
726 | static int __must_check __deliver_io(struct kvm_vcpu *vcpu, | |
6d3da241 | 727 | unsigned long irq_type) |
0fb97abe | 728 | { |
6d3da241 JF |
729 | struct list_head *isc_list; |
730 | struct kvm_s390_float_interrupt *fi; | |
731 | struct kvm_s390_interrupt_info *inti = NULL; | |
732 | int rc = 0; | |
0fb97abe | 733 | |
6d3da241 | 734 | fi = &vcpu->kvm->arch.float_int; |
8712836b | 735 | |
6d3da241 JF |
736 | spin_lock(&fi->lock); |
737 | isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0]; | |
738 | inti = list_first_entry_or_null(isc_list, | |
739 | struct kvm_s390_interrupt_info, | |
740 | list); | |
741 | if (inti) { | |
3f24ba15 | 742 | VCPU_EVENT(vcpu, 4, "deliver: I/O 0x%llx", inti->type); |
6d3da241 JF |
743 | vcpu->stat.deliver_io_int++; |
744 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
745 | inti->type, | |
746 | ((__u32)inti->io.subchannel_id << 16) | | |
747 | inti->io.subchannel_nr, | |
748 | ((__u64)inti->io.io_int_parm << 32) | | |
749 | inti->io.io_int_word); | |
750 | list_del(&inti->list); | |
751 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
752 | } | |
753 | if (list_empty(isc_list)) | |
754 | clear_bit(irq_type, &fi->pending_irqs); | |
755 | spin_unlock(&fi->lock); | |
756 | ||
757 | if (inti) { | |
758 | rc = put_guest_lc(vcpu, inti->io.subchannel_id, | |
759 | (u16 *)__LC_SUBCHANNEL_ID); | |
760 | rc |= put_guest_lc(vcpu, inti->io.subchannel_nr, | |
761 | (u16 *)__LC_SUBCHANNEL_NR); | |
762 | rc |= put_guest_lc(vcpu, inti->io.io_int_parm, | |
763 | (u32 *)__LC_IO_INT_PARM); | |
764 | rc |= put_guest_lc(vcpu, inti->io.io_int_word, | |
765 | (u32 *)__LC_IO_INT_WORD); | |
766 | rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, | |
767 | &vcpu->arch.sie_block->gpsw, | |
768 | sizeof(psw_t)); | |
769 | rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, | |
770 | &vcpu->arch.sie_block->gpsw, | |
771 | sizeof(psw_t)); | |
772 | kfree(inti); | |
773 | } | |
383d0b05 | 774 | |
99e20009 | 775 | return rc ? -EFAULT : 0; |
383d0b05 JF |
776 | } |
777 | ||
778 | typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu); | |
779 | ||
780 | static const deliver_irq_t deliver_irq_funcs[] = { | |
781 | [IRQ_PEND_MCHK_EX] = __deliver_machine_check, | |
6d3da241 | 782 | [IRQ_PEND_MCHK_REP] = __deliver_machine_check, |
383d0b05 JF |
783 | [IRQ_PEND_PROG] = __deliver_prog, |
784 | [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal, | |
785 | [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call, | |
786 | [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc, | |
787 | [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer, | |
788 | [IRQ_PEND_RESTART] = __deliver_restart, | |
383d0b05 JF |
789 | [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix, |
790 | [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init, | |
6d3da241 JF |
791 | [IRQ_PEND_EXT_SERVICE] = __deliver_service, |
792 | [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done, | |
793 | [IRQ_PEND_VIRTIO] = __deliver_virtio, | |
383d0b05 JF |
794 | }; |
795 | ||
ea5f4969 DH |
796 | /* Check whether an external call is pending (deliverable or not) */ |
797 | int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) | |
4953919f | 798 | { |
ea5f4969 DH |
799 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
800 | uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
4953919f | 801 | |
37c5f6c8 | 802 | if (!sclp.has_sigpif) |
ea5f4969 | 803 | return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); |
4953919f | 804 | |
ea5f4969 DH |
805 | return (sigp_ctrl & SIGP_CTRL_C) && |
806 | (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND); | |
4953919f DH |
807 | } |
808 | ||
9a022067 | 809 | int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) |
ba5c1e9b | 810 | { |
383d0b05 | 811 | int rc; |
ba5c1e9b | 812 | |
6d3da241 | 813 | rc = !!deliverable_irqs(vcpu); |
ba5c1e9b | 814 | |
bb78c5ec DH |
815 | if (!rc && kvm_cpu_has_pending_timer(vcpu)) |
816 | rc = 1; | |
ba5c1e9b | 817 | |
ea5f4969 DH |
818 | /* external call pending and deliverable */ |
819 | if (!rc && kvm_s390_ext_call_pending(vcpu) && | |
820 | !psw_extint_disabled(vcpu) && | |
821 | (vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
4953919f DH |
822 | rc = 1; |
823 | ||
9a022067 | 824 | if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) |
6cddd432 DH |
825 | rc = 1; |
826 | ||
ba5c1e9b CO |
827 | return rc; |
828 | } | |
829 | ||
3d80840d MT |
830 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
831 | { | |
b4aec925 | 832 | return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu); |
3d80840d MT |
833 | } |
834 | ||
ba5c1e9b CO |
835 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
836 | { | |
837 | u64 now, sltime; | |
ba5c1e9b CO |
838 | |
839 | vcpu->stat.exit_wait_state++; | |
ba5c1e9b | 840 | |
0759d068 DH |
841 | /* fast path */ |
842 | if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu)) | |
843 | return 0; | |
e52b2af5 | 844 | |
ba5c1e9b CO |
845 | if (psw_interrupts_disabled(vcpu)) { |
846 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
b8e660b8 | 847 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
848 | } |
849 | ||
bb78c5ec | 850 | if (!ckc_interrupts_enabled(vcpu)) { |
ba5c1e9b | 851 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
bda343ef | 852 | __set_cpu_idle(vcpu); |
ba5c1e9b CO |
853 | goto no_timer; |
854 | } | |
855 | ||
fdf03650 | 856 | preempt_disable(); |
8c071b0f | 857 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
fdf03650 | 858 | preempt_enable(); |
ed4f2094 | 859 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); |
bda343ef DH |
860 | |
861 | /* underflow */ | |
862 | if (vcpu->arch.sie_block->ckc < now) | |
863 | return 0; | |
864 | ||
865 | __set_cpu_idle(vcpu); | |
ca872302 | 866 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
3f24ba15 | 867 | VCPU_EVENT(vcpu, 4, "enabled wait via clock comparator: %llu ns", sltime); |
ba5c1e9b | 868 | no_timer: |
800c1065 | 869 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
0759d068 | 870 | kvm_vcpu_block(vcpu); |
ba5c1e9b | 871 | __unset_cpu_idle(vcpu); |
800c1065 TH |
872 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
873 | ||
2d00f759 | 874 | hrtimer_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
875 | return 0; |
876 | } | |
877 | ||
0e9c85a5 DH |
878 | void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
879 | { | |
880 | if (waitqueue_active(&vcpu->wq)) { | |
881 | /* | |
882 | * The vcpu gave up the cpu voluntarily, mark it as a good | |
883 | * yield-candidate. | |
884 | */ | |
885 | vcpu->preempted = true; | |
886 | wake_up_interruptible(&vcpu->wq); | |
ce2e4f0b | 887 | vcpu->stat.halt_wakeup++; |
0e9c85a5 DH |
888 | } |
889 | } | |
890 | ||
ca872302 CB |
891 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
892 | { | |
893 | struct kvm_vcpu *vcpu; | |
2d00f759 | 894 | u64 now, sltime; |
ca872302 CB |
895 | |
896 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
fdf03650 | 897 | preempt_disable(); |
2d00f759 | 898 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
fdf03650 | 899 | preempt_enable(); |
2d00f759 | 900 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); |
ca872302 | 901 | |
2d00f759 DH |
902 | /* |
903 | * If the monotonic clock runs faster than the tod clock we might be | |
904 | * woken up too early and have to go back to sleep to avoid deadlocks. | |
905 | */ | |
906 | if (vcpu->arch.sie_block->ckc > now && | |
907 | hrtimer_forward_now(timer, ns_to_ktime(sltime))) | |
908 | return HRTIMER_RESTART; | |
909 | kvm_s390_vcpu_wakeup(vcpu); | |
ca872302 CB |
910 | return HRTIMER_NORESTART; |
911 | } | |
ba5c1e9b | 912 | |
2ed10cc1 JF |
913 | void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
914 | { | |
915 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2ed10cc1 | 916 | |
4ae3c081 | 917 | spin_lock(&li->lock); |
383d0b05 JF |
918 | li->pending_irqs = 0; |
919 | bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
920 | memset(&li->irq, 0, sizeof(li->irq)); | |
4ae3c081 | 921 | spin_unlock(&li->lock); |
4953919f DH |
922 | |
923 | /* clear pending external calls set by sigp interpretation facility */ | |
805de8f4 | 924 | atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags); |
ea5f4969 | 925 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0; |
2ed10cc1 JF |
926 | } |
927 | ||
614aeab4 | 928 | int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
ba5c1e9b | 929 | { |
180c12fb | 930 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
383d0b05 | 931 | deliver_irq_t func; |
79395031 | 932 | int rc = 0; |
383d0b05 | 933 | unsigned long irq_type; |
6d3da241 | 934 | unsigned long irqs; |
ba5c1e9b CO |
935 | |
936 | __reset_intercept_indicators(vcpu); | |
ba5c1e9b | 937 | |
383d0b05 JF |
938 | /* pending ckc conditions might have been invalidated */ |
939 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
b4aec925 | 940 | if (ckc_irq_pending(vcpu)) |
383d0b05 JF |
941 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
942 | ||
b4aec925 DH |
943 | /* pending cpu timer conditions might have been invalidated */ |
944 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
945 | if (cpu_timer_irq_pending(vcpu)) | |
946 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
947 | ||
ffeca0ae | 948 | while ((irqs = deliverable_irqs(vcpu)) && !rc) { |
383d0b05 | 949 | /* bits are in the order of interrupt priority */ |
6d3da241 | 950 | irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT); |
6d3da241 JF |
951 | if (is_ioirq(irq_type)) { |
952 | rc = __deliver_io(vcpu, irq_type); | |
953 | } else { | |
954 | func = deliver_irq_funcs[irq_type]; | |
955 | if (!func) { | |
956 | WARN_ON_ONCE(func == NULL); | |
957 | clear_bit(irq_type, &li->pending_irqs); | |
958 | continue; | |
959 | } | |
960 | rc = func(vcpu); | |
383d0b05 | 961 | } |
ffeca0ae | 962 | } |
383d0b05 | 963 | |
6d3da241 | 964 | set_intercept_indicators(vcpu); |
79395031 JF |
965 | |
966 | return rc; | |
ba5c1e9b CO |
967 | } |
968 | ||
383d0b05 | 969 | static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
970 | { |
971 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
972 | ||
ed2afcfa DH |
973 | VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code); |
974 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
975 | irq->u.pgm.code, 0); | |
976 | ||
383d0b05 | 977 | li->irq.pgm = irq->u.pgm; |
9185124e | 978 | set_bit(IRQ_PEND_PROG, &li->pending_irqs); |
0146a7b0 JF |
979 | return 0; |
980 | } | |
981 | ||
ba5c1e9b CO |
982 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) |
983 | { | |
180c12fb | 984 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
383d0b05 | 985 | struct kvm_s390_irq irq; |
ba5c1e9b | 986 | |
4ae3c081 | 987 | spin_lock(&li->lock); |
383d0b05 JF |
988 | irq.u.pgm.code = code; |
989 | __inject_prog(vcpu, &irq); | |
d0321a24 | 990 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 991 | spin_unlock(&li->lock); |
bcd84683 JF |
992 | return 0; |
993 | } | |
994 | ||
995 | int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, | |
996 | struct kvm_s390_pgm_info *pgm_info) | |
997 | { | |
998 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 999 | struct kvm_s390_irq irq; |
0146a7b0 | 1000 | int rc; |
bcd84683 | 1001 | |
4ae3c081 | 1002 | spin_lock(&li->lock); |
383d0b05 JF |
1003 | irq.u.pgm = *pgm_info; |
1004 | rc = __inject_prog(vcpu, &irq); | |
bcd84683 | 1005 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 1006 | spin_unlock(&li->lock); |
0146a7b0 JF |
1007 | return rc; |
1008 | } | |
1009 | ||
383d0b05 | 1010 | static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1011 | { |
1012 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1013 | ||
3f24ba15 CB |
1014 | VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx", |
1015 | irq->u.ext.ext_params2); | |
383d0b05 JF |
1016 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, |
1017 | irq->u.ext.ext_params, | |
ed2afcfa | 1018 | irq->u.ext.ext_params2); |
383d0b05 JF |
1019 | |
1020 | li->irq.ext = irq->u.ext; | |
1021 | set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
805de8f4 | 1022 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1023 | return 0; |
1024 | } | |
1025 | ||
ea5f4969 DH |
1026 | static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id) |
1027 | { | |
1028 | unsigned char new_val, old_val; | |
1029 | uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
1030 | ||
1031 | new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK); | |
1032 | old_val = *sigp_ctrl & ~SIGP_CTRL_C; | |
1033 | if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) { | |
1034 | /* another external call is pending */ | |
1035 | return -EBUSY; | |
1036 | } | |
805de8f4 | 1037 | atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags); |
ea5f4969 DH |
1038 | return 0; |
1039 | } | |
1040 | ||
0675d92d | 1041 | static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1042 | { |
1043 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1044 | struct kvm_s390_extcall_info *extcall = &li->irq.extcall; |
ea5f4969 | 1045 | uint16_t src_id = irq->u.extcall.code; |
0146a7b0 | 1046 | |
3f24ba15 | 1047 | VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u", |
ea5f4969 | 1048 | src_id); |
383d0b05 | 1049 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, |
ed2afcfa | 1050 | src_id, 0); |
ea5f4969 DH |
1051 | |
1052 | /* sending vcpu invalid */ | |
1053 | if (src_id >= KVM_MAX_VCPUS || | |
1054 | kvm_get_vcpu(vcpu->kvm, src_id) == NULL) | |
1055 | return -EINVAL; | |
1056 | ||
37c5f6c8 | 1057 | if (sclp.has_sigpif) |
ea5f4969 | 1058 | return __inject_extcall_sigpif(vcpu, src_id); |
383d0b05 | 1059 | |
b938eace | 1060 | if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) |
ea5f4969 | 1061 | return -EBUSY; |
383d0b05 | 1062 | *extcall = irq->u.extcall; |
805de8f4 | 1063 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1064 | return 0; |
1065 | } | |
1066 | ||
383d0b05 | 1067 | static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1068 | { |
1069 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1070 | struct kvm_s390_prefix_info *prefix = &li->irq.prefix; |
0146a7b0 | 1071 | |
ed2afcfa | 1072 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x", |
556cc0da | 1073 | irq->u.prefix.address); |
383d0b05 | 1074 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, |
ed2afcfa | 1075 | irq->u.prefix.address, 0); |
383d0b05 | 1076 | |
a3a9c59a DH |
1077 | if (!is_vcpu_stopped(vcpu)) |
1078 | return -EBUSY; | |
1079 | ||
383d0b05 JF |
1080 | *prefix = irq->u.prefix; |
1081 | set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
0146a7b0 JF |
1082 | return 0; |
1083 | } | |
1084 | ||
6cddd432 | 1085 | #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) |
383d0b05 | 1086 | static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1087 | { |
1088 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2822545f | 1089 | struct kvm_s390_stop_info *stop = &li->irq.stop; |
6cddd432 | 1090 | int rc = 0; |
0146a7b0 | 1091 | |
ed2afcfa | 1092 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0); |
383d0b05 | 1093 | |
2822545f DH |
1094 | if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) |
1095 | return -EINVAL; | |
1096 | ||
6cddd432 DH |
1097 | if (is_vcpu_stopped(vcpu)) { |
1098 | if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) | |
1099 | rc = kvm_s390_store_status_unloaded(vcpu, | |
1100 | KVM_S390_STORE_STATUS_NOADDR); | |
1101 | return rc; | |
1102 | } | |
1103 | ||
1104 | if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) | |
1105 | return -EBUSY; | |
2822545f | 1106 | stop->flags = irq->u.stop.flags; |
6cddd432 | 1107 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); |
0146a7b0 JF |
1108 | return 0; |
1109 | } | |
1110 | ||
1111 | static int __inject_sigp_restart(struct kvm_vcpu *vcpu, | |
383d0b05 | 1112 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1113 | { |
1114 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1115 | ||
3f24ba15 | 1116 | VCPU_EVENT(vcpu, 3, "%s", "inject: restart int"); |
ed2afcfa | 1117 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); |
383d0b05 JF |
1118 | |
1119 | set_bit(IRQ_PEND_RESTART, &li->pending_irqs); | |
0146a7b0 JF |
1120 | return 0; |
1121 | } | |
1122 | ||
1123 | static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, | |
383d0b05 | 1124 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1125 | { |
1126 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1127 | ||
3f24ba15 | 1128 | VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u", |
383d0b05 JF |
1129 | irq->u.emerg.code); |
1130 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, | |
ed2afcfa | 1131 | irq->u.emerg.code, 0); |
383d0b05 | 1132 | |
49538d12 | 1133 | set_bit(irq->u.emerg.code, li->sigp_emerg_pending); |
383d0b05 | 1134 | set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
805de8f4 | 1135 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1136 | return 0; |
1137 | } | |
1138 | ||
383d0b05 | 1139 | static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1140 | { |
1141 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1142 | struct kvm_s390_mchk_info *mchk = &li->irq.mchk; |
0146a7b0 | 1143 | |
3f24ba15 | 1144 | VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx", |
556cc0da | 1145 | irq->u.mchk.mcic); |
383d0b05 | 1146 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, |
ed2afcfa | 1147 | irq->u.mchk.mcic); |
383d0b05 JF |
1148 | |
1149 | /* | |
fc2020cf JF |
1150 | * Because repressible machine checks can be indicated along with |
1151 | * exigent machine checks (PoP, Chapter 11, Interruption action) | |
1152 | * we need to combine cr14, mcic and external damage code. | |
1153 | * Failing storage address and the logout area should not be or'ed | |
1154 | * together, we just indicate the last occurrence of the corresponding | |
1155 | * machine check | |
383d0b05 | 1156 | */ |
fc2020cf | 1157 | mchk->cr14 |= irq->u.mchk.cr14; |
383d0b05 | 1158 | mchk->mcic |= irq->u.mchk.mcic; |
fc2020cf JF |
1159 | mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; |
1160 | mchk->failing_storage_address = irq->u.mchk.failing_storage_address; | |
1161 | memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, | |
1162 | sizeof(mchk->fixed_logout)); | |
383d0b05 JF |
1163 | if (mchk->mcic & MCHK_EX_MASK) |
1164 | set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
1165 | else if (mchk->mcic & MCHK_REP_MASK) | |
1166 | set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
0146a7b0 JF |
1167 | return 0; |
1168 | } | |
1169 | ||
383d0b05 | 1170 | static int __inject_ckc(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1171 | { |
1172 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1173 | ||
3f24ba15 | 1174 | VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external"); |
383d0b05 | 1175 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, |
ed2afcfa | 1176 | 0, 0); |
383d0b05 JF |
1177 | |
1178 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
805de8f4 | 1179 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1180 | return 0; |
1181 | } | |
1182 | ||
383d0b05 | 1183 | static int __inject_cpu_timer(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1184 | { |
1185 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1186 | ||
3f24ba15 | 1187 | VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external"); |
383d0b05 | 1188 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, |
ed2afcfa | 1189 | 0, 0); |
383d0b05 JF |
1190 | |
1191 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
805de8f4 | 1192 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
ba5c1e9b CO |
1193 | return 0; |
1194 | } | |
1195 | ||
6d3da241 JF |
1196 | static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm, |
1197 | int isc, u32 schid) | |
1198 | { | |
1199 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1200 | struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1201 | struct kvm_s390_interrupt_info *iter; | |
1202 | u16 id = (schid & 0xffff0000U) >> 16; | |
1203 | u16 nr = schid & 0x0000ffffU; | |
1204 | ||
1205 | spin_lock(&fi->lock); | |
1206 | list_for_each_entry(iter, isc_list, list) { | |
1207 | if (schid && (id != iter->io.subchannel_id || | |
1208 | nr != iter->io.subchannel_nr)) | |
1209 | continue; | |
1210 | /* found an appropriate entry */ | |
1211 | list_del_init(&iter->list); | |
1212 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
1213 | if (list_empty(isc_list)) | |
1214 | clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); | |
1215 | spin_unlock(&fi->lock); | |
1216 | return iter; | |
1217 | } | |
1218 | spin_unlock(&fi->lock); | |
1219 | return NULL; | |
1220 | } | |
383d0b05 | 1221 | |
6d3da241 JF |
1222 | /* |
1223 | * Dequeue and return an I/O interrupt matching any of the interruption | |
1224 | * subclasses as designated by the isc mask in cr6 and the schid (if != 0). | |
1225 | */ | |
fa6b7fe9 | 1226 | struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
6d3da241 JF |
1227 | u64 isc_mask, u32 schid) |
1228 | { | |
1229 | struct kvm_s390_interrupt_info *inti = NULL; | |
1230 | int isc; | |
1231 | ||
1232 | for (isc = 0; isc <= MAX_ISC && !inti; isc++) { | |
1233 | if (isc_mask & isc_to_isc_bits(isc)) | |
1234 | inti = get_io_int(kvm, isc, schid); | |
1235 | } | |
1236 | return inti; | |
1237 | } | |
1238 | ||
1239 | #define SCCB_MASK 0xFFFFFFF8 | |
1240 | #define SCCB_EVENT_PENDING 0x3 | |
1241 | ||
1242 | static int __inject_service(struct kvm *kvm, | |
1243 | struct kvm_s390_interrupt_info *inti) | |
1244 | { | |
1245 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1246 | ||
1247 | spin_lock(&fi->lock); | |
1248 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING; | |
1249 | /* | |
1250 | * Early versions of the QEMU s390 bios will inject several | |
1251 | * service interrupts after another without handling a | |
1252 | * condition code indicating busy. | |
1253 | * We will silently ignore those superfluous sccb values. | |
1254 | * A future version of QEMU will take care of serialization | |
1255 | * of servc requests | |
1256 | */ | |
1257 | if (fi->srv_signal.ext_params & SCCB_MASK) | |
1258 | goto out; | |
1259 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK; | |
1260 | set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
1261 | out: | |
1262 | spin_unlock(&fi->lock); | |
1263 | kfree(inti); | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | static int __inject_virtio(struct kvm *kvm, | |
1268 | struct kvm_s390_interrupt_info *inti) | |
1269 | { | |
1270 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1271 | ||
1272 | spin_lock(&fi->lock); | |
1273 | if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) { | |
1274 | spin_unlock(&fi->lock); | |
1275 | return -EBUSY; | |
1276 | } | |
1277 | fi->counters[FIRQ_CNTR_VIRTIO] += 1; | |
1278 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]); | |
1279 | set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
1280 | spin_unlock(&fi->lock); | |
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | static int __inject_pfault_done(struct kvm *kvm, | |
1285 | struct kvm_s390_interrupt_info *inti) | |
1286 | { | |
1287 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1288 | ||
1289 | spin_lock(&fi->lock); | |
1290 | if (fi->counters[FIRQ_CNTR_PFAULT] >= | |
1291 | (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) { | |
1292 | spin_unlock(&fi->lock); | |
1293 | return -EBUSY; | |
1294 | } | |
1295 | fi->counters[FIRQ_CNTR_PFAULT] += 1; | |
1296 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]); | |
1297 | set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
1298 | spin_unlock(&fi->lock); | |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | #define CR_PENDING_SUBCLASS 28 | |
1303 | static int __inject_float_mchk(struct kvm *kvm, | |
1304 | struct kvm_s390_interrupt_info *inti) | |
1305 | { | |
1306 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1307 | ||
1308 | spin_lock(&fi->lock); | |
1309 | fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS); | |
1310 | fi->mchk.mcic |= inti->mchk.mcic; | |
1311 | set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs); | |
1312 | spin_unlock(&fi->lock); | |
1313 | kfree(inti); | |
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
fa6b7fe9 CH |
1318 | { |
1319 | struct kvm_s390_float_interrupt *fi; | |
6d3da241 JF |
1320 | struct list_head *list; |
1321 | int isc; | |
fa6b7fe9 | 1322 | |
fa6b7fe9 CH |
1323 | fi = &kvm->arch.float_int; |
1324 | spin_lock(&fi->lock); | |
6d3da241 JF |
1325 | if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) { |
1326 | spin_unlock(&fi->lock); | |
1327 | return -EBUSY; | |
a91b8ebe | 1328 | } |
6d3da241 JF |
1329 | fi->counters[FIRQ_CNTR_IO] += 1; |
1330 | ||
1331 | isc = int_word_to_isc(inti->io.io_int_word); | |
1332 | list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1333 | list_add_tail(&inti->list, list); | |
1334 | set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); | |
fa6b7fe9 | 1335 | spin_unlock(&fi->lock); |
6d3da241 | 1336 | return 0; |
fa6b7fe9 | 1337 | } |
ba5c1e9b | 1338 | |
96e0ed23 DH |
1339 | /* |
1340 | * Find a destination VCPU for a floating irq and kick it. | |
1341 | */ | |
1342 | static void __floating_irq_kick(struct kvm *kvm, u64 type) | |
ba5c1e9b | 1343 | { |
96e0ed23 | 1344 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
180c12fb | 1345 | struct kvm_s390_local_interrupt *li; |
96e0ed23 DH |
1346 | struct kvm_vcpu *dst_vcpu; |
1347 | int sigcpu, online_vcpus, nr_tries = 0; | |
1348 | ||
1349 | online_vcpus = atomic_read(&kvm->online_vcpus); | |
1350 | if (!online_vcpus) | |
1351 | return; | |
1352 | ||
1353 | /* find idle VCPUs first, then round robin */ | |
1354 | sigcpu = find_first_bit(fi->idle_mask, online_vcpus); | |
1355 | if (sigcpu == online_vcpus) { | |
1356 | do { | |
1357 | sigcpu = fi->next_rr_cpu; | |
1358 | fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus; | |
1359 | /* avoid endless loops if all vcpus are stopped */ | |
1360 | if (nr_tries++ >= online_vcpus) | |
1361 | return; | |
1362 | } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu))); | |
1363 | } | |
1364 | dst_vcpu = kvm_get_vcpu(kvm, sigcpu); | |
1365 | ||
1366 | /* make the VCPU drop out of the SIE, or wake it up if sleeping */ | |
1367 | li = &dst_vcpu->arch.local_int; | |
1368 | spin_lock(&li->lock); | |
1369 | switch (type) { | |
1370 | case KVM_S390_MCHK: | |
805de8f4 | 1371 | atomic_or(CPUSTAT_STOP_INT, li->cpuflags); |
96e0ed23 DH |
1372 | break; |
1373 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
805de8f4 | 1374 | atomic_or(CPUSTAT_IO_INT, li->cpuflags); |
96e0ed23 DH |
1375 | break; |
1376 | default: | |
805de8f4 | 1377 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
96e0ed23 DH |
1378 | break; |
1379 | } | |
1380 | spin_unlock(&li->lock); | |
1381 | kvm_s390_vcpu_wakeup(dst_vcpu); | |
1382 | } | |
1383 | ||
1384 | static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
1385 | { | |
6d3da241 JF |
1386 | u64 type = READ_ONCE(inti->type); |
1387 | int rc; | |
ba5c1e9b | 1388 | |
6d3da241 JF |
1389 | switch (type) { |
1390 | case KVM_S390_MCHK: | |
1391 | rc = __inject_float_mchk(kvm, inti); | |
1392 | break; | |
1393 | case KVM_S390_INT_VIRTIO: | |
1394 | rc = __inject_virtio(kvm, inti); | |
1395 | break; | |
1396 | case KVM_S390_INT_SERVICE: | |
1397 | rc = __inject_service(kvm, inti); | |
1398 | break; | |
1399 | case KVM_S390_INT_PFAULT_DONE: | |
1400 | rc = __inject_pfault_done(kvm, inti); | |
1401 | break; | |
1402 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1403 | rc = __inject_io(kvm, inti); | |
1404 | break; | |
1405 | default: | |
a91b8ebe | 1406 | rc = -EINVAL; |
c05c4186 | 1407 | } |
6d3da241 JF |
1408 | if (rc) |
1409 | return rc; | |
1410 | ||
96e0ed23 | 1411 | __floating_irq_kick(kvm, type); |
6d3da241 | 1412 | return 0; |
c05c4186 JF |
1413 | } |
1414 | ||
1415 | int kvm_s390_inject_vm(struct kvm *kvm, | |
1416 | struct kvm_s390_interrupt *s390int) | |
1417 | { | |
1418 | struct kvm_s390_interrupt_info *inti; | |
428d53be | 1419 | int rc; |
c05c4186 | 1420 | |
ba5c1e9b CO |
1421 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
1422 | if (!inti) | |
1423 | return -ENOMEM; | |
1424 | ||
c05c4186 JF |
1425 | inti->type = s390int->type; |
1426 | switch (inti->type) { | |
ba5c1e9b | 1427 | case KVM_S390_INT_VIRTIO: |
33e19115 | 1428 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b | 1429 | s390int->parm, s390int->parm64); |
ba5c1e9b CO |
1430 | inti->ext.ext_params = s390int->parm; |
1431 | inti->ext.ext_params2 = s390int->parm64; | |
1432 | break; | |
1433 | case KVM_S390_INT_SERVICE: | |
3f24ba15 | 1434 | VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm); |
ba5c1e9b CO |
1435 | inti->ext.ext_params = s390int->parm; |
1436 | break; | |
3c038e6b | 1437 | case KVM_S390_INT_PFAULT_DONE: |
3c038e6b DD |
1438 | inti->ext.ext_params2 = s390int->parm64; |
1439 | break; | |
48a3e950 | 1440 | case KVM_S390_MCHK: |
3f24ba15 | 1441 | VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx", |
48a3e950 | 1442 | s390int->parm64); |
48a3e950 CH |
1443 | inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
1444 | inti->mchk.mcic = s390int->parm64; | |
1445 | break; | |
d8346b7d | 1446 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
a37281b6 | 1447 | if (inti->type & KVM_S390_INT_IO_AI_MASK) |
d8346b7d CH |
1448 | VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)"); |
1449 | else | |
1450 | VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x", | |
1451 | s390int->type & IOINT_CSSID_MASK, | |
1452 | s390int->type & IOINT_SSID_MASK, | |
1453 | s390int->type & IOINT_SCHID_MASK); | |
d8346b7d CH |
1454 | inti->io.subchannel_id = s390int->parm >> 16; |
1455 | inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; | |
1456 | inti->io.io_int_parm = s390int->parm64 >> 32; | |
1457 | inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; | |
1458 | break; | |
ba5c1e9b CO |
1459 | default: |
1460 | kfree(inti); | |
1461 | return -EINVAL; | |
1462 | } | |
ade38c31 CH |
1463 | trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
1464 | 2); | |
ba5c1e9b | 1465 | |
428d53be DH |
1466 | rc = __inject_vm(kvm, inti); |
1467 | if (rc) | |
1468 | kfree(inti); | |
1469 | return rc; | |
ba5c1e9b CO |
1470 | } |
1471 | ||
15462e37 | 1472 | int kvm_s390_reinject_io_int(struct kvm *kvm, |
2f32d4ea CH |
1473 | struct kvm_s390_interrupt_info *inti) |
1474 | { | |
15462e37 | 1475 | return __inject_vm(kvm, inti); |
2f32d4ea CH |
1476 | } |
1477 | ||
383d0b05 JF |
1478 | int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
1479 | struct kvm_s390_irq *irq) | |
1480 | { | |
1481 | irq->type = s390int->type; | |
1482 | switch (irq->type) { | |
1483 | case KVM_S390_PROGRAM_INT: | |
1484 | if (s390int->parm & 0xffff0000) | |
1485 | return -EINVAL; | |
1486 | irq->u.pgm.code = s390int->parm; | |
1487 | break; | |
1488 | case KVM_S390_SIGP_SET_PREFIX: | |
1489 | irq->u.prefix.address = s390int->parm; | |
1490 | break; | |
2822545f DH |
1491 | case KVM_S390_SIGP_STOP: |
1492 | irq->u.stop.flags = s390int->parm; | |
1493 | break; | |
383d0b05 | 1494 | case KVM_S390_INT_EXTERNAL_CALL: |
94d1f564 | 1495 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1496 | return -EINVAL; |
1497 | irq->u.extcall.code = s390int->parm; | |
1498 | break; | |
1499 | case KVM_S390_INT_EMERGENCY: | |
94d1f564 | 1500 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1501 | return -EINVAL; |
1502 | irq->u.emerg.code = s390int->parm; | |
1503 | break; | |
1504 | case KVM_S390_MCHK: | |
1505 | irq->u.mchk.mcic = s390int->parm64; | |
1506 | break; | |
1507 | } | |
1508 | return 0; | |
1509 | } | |
1510 | ||
6cddd432 DH |
1511 | int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) |
1512 | { | |
1513 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1514 | ||
1515 | return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1516 | } | |
1517 | ||
1518 | void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) | |
1519 | { | |
1520 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1521 | ||
1522 | spin_lock(&li->lock); | |
1523 | li->irq.stop.flags = 0; | |
1524 | clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1525 | spin_unlock(&li->lock); | |
1526 | } | |
1527 | ||
79e87a10 | 1528 | static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
ba5c1e9b | 1529 | { |
0146a7b0 | 1530 | int rc; |
ba5c1e9b | 1531 | |
383d0b05 | 1532 | switch (irq->type) { |
ba5c1e9b | 1533 | case KVM_S390_PROGRAM_INT: |
383d0b05 | 1534 | rc = __inject_prog(vcpu, irq); |
ba5c1e9b | 1535 | break; |
b7e6e4d3 | 1536 | case KVM_S390_SIGP_SET_PREFIX: |
383d0b05 | 1537 | rc = __inject_set_prefix(vcpu, irq); |
b7e6e4d3 | 1538 | break; |
ba5c1e9b | 1539 | case KVM_S390_SIGP_STOP: |
383d0b05 | 1540 | rc = __inject_sigp_stop(vcpu, irq); |
0146a7b0 | 1541 | break; |
ba5c1e9b | 1542 | case KVM_S390_RESTART: |
383d0b05 | 1543 | rc = __inject_sigp_restart(vcpu, irq); |
0146a7b0 | 1544 | break; |
e029ae5b | 1545 | case KVM_S390_INT_CLOCK_COMP: |
383d0b05 | 1546 | rc = __inject_ckc(vcpu); |
0146a7b0 | 1547 | break; |
e029ae5b | 1548 | case KVM_S390_INT_CPU_TIMER: |
383d0b05 | 1549 | rc = __inject_cpu_timer(vcpu); |
82a12737 | 1550 | break; |
7697e71f | 1551 | case KVM_S390_INT_EXTERNAL_CALL: |
383d0b05 | 1552 | rc = __inject_extcall(vcpu, irq); |
82a12737 | 1553 | break; |
ba5c1e9b | 1554 | case KVM_S390_INT_EMERGENCY: |
383d0b05 | 1555 | rc = __inject_sigp_emergency(vcpu, irq); |
ba5c1e9b | 1556 | break; |
48a3e950 | 1557 | case KVM_S390_MCHK: |
383d0b05 | 1558 | rc = __inject_mchk(vcpu, irq); |
48a3e950 | 1559 | break; |
3c038e6b | 1560 | case KVM_S390_INT_PFAULT_INIT: |
383d0b05 | 1561 | rc = __inject_pfault_init(vcpu, irq); |
3c038e6b | 1562 | break; |
ba5c1e9b CO |
1563 | case KVM_S390_INT_VIRTIO: |
1564 | case KVM_S390_INT_SERVICE: | |
d8346b7d | 1565 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
ba5c1e9b | 1566 | default: |
0146a7b0 | 1567 | rc = -EINVAL; |
ba5c1e9b | 1568 | } |
79e87a10 JF |
1569 | |
1570 | return rc; | |
1571 | } | |
1572 | ||
1573 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) | |
1574 | { | |
1575 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1576 | int rc; | |
1577 | ||
1578 | spin_lock(&li->lock); | |
1579 | rc = do_inject_vcpu(vcpu, irq); | |
4ae3c081 | 1580 | spin_unlock(&li->lock); |
0146a7b0 JF |
1581 | if (!rc) |
1582 | kvm_s390_vcpu_wakeup(vcpu); | |
0146a7b0 | 1583 | return rc; |
ba5c1e9b | 1584 | } |
c05c4186 | 1585 | |
6d3da241 | 1586 | static inline void clear_irq_list(struct list_head *_list) |
c05c4186 | 1587 | { |
6d3da241 | 1588 | struct kvm_s390_interrupt_info *inti, *n; |
c05c4186 | 1589 | |
6d3da241 | 1590 | list_for_each_entry_safe(inti, n, _list, list) { |
c05c4186 JF |
1591 | list_del(&inti->list); |
1592 | kfree(inti); | |
1593 | } | |
c05c4186 JF |
1594 | } |
1595 | ||
94aa033e JF |
1596 | static void inti_to_irq(struct kvm_s390_interrupt_info *inti, |
1597 | struct kvm_s390_irq *irq) | |
c05c4186 | 1598 | { |
94aa033e | 1599 | irq->type = inti->type; |
c05c4186 | 1600 | switch (inti->type) { |
3c038e6b DD |
1601 | case KVM_S390_INT_PFAULT_INIT: |
1602 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 | 1603 | case KVM_S390_INT_VIRTIO: |
94aa033e | 1604 | irq->u.ext = inti->ext; |
c05c4186 JF |
1605 | break; |
1606 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
94aa033e | 1607 | irq->u.io = inti->io; |
c05c4186 | 1608 | break; |
c05c4186 | 1609 | } |
c05c4186 JF |
1610 | } |
1611 | ||
6d3da241 JF |
1612 | void kvm_s390_clear_float_irqs(struct kvm *kvm) |
1613 | { | |
1614 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1615 | int i; | |
1616 | ||
1617 | spin_lock(&fi->lock); | |
f2ae45ed JF |
1618 | fi->pending_irqs = 0; |
1619 | memset(&fi->srv_signal, 0, sizeof(fi->srv_signal)); | |
1620 | memset(&fi->mchk, 0, sizeof(fi->mchk)); | |
6d3da241 JF |
1621 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1622 | clear_irq_list(&fi->lists[i]); | |
1623 | for (i = 0; i < FIRQ_MAX_COUNT; i++) | |
1624 | fi->counters[i] = 0; | |
1625 | spin_unlock(&fi->lock); | |
1626 | }; | |
1627 | ||
94aa033e | 1628 | static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len) |
c05c4186 JF |
1629 | { |
1630 | struct kvm_s390_interrupt_info *inti; | |
1631 | struct kvm_s390_float_interrupt *fi; | |
94aa033e | 1632 | struct kvm_s390_irq *buf; |
6d3da241 | 1633 | struct kvm_s390_irq *irq; |
94aa033e | 1634 | int max_irqs; |
c05c4186 JF |
1635 | int ret = 0; |
1636 | int n = 0; | |
6d3da241 | 1637 | int i; |
c05c4186 | 1638 | |
94aa033e JF |
1639 | if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0) |
1640 | return -EINVAL; | |
1641 | ||
1642 | /* | |
1643 | * We are already using -ENOMEM to signal | |
1644 | * userspace it may retry with a bigger buffer, | |
1645 | * so we need to use something else for this case | |
1646 | */ | |
1647 | buf = vzalloc(len); | |
1648 | if (!buf) | |
1649 | return -ENOBUFS; | |
1650 | ||
1651 | max_irqs = len / sizeof(struct kvm_s390_irq); | |
1652 | ||
c05c4186 JF |
1653 | fi = &kvm->arch.float_int; |
1654 | spin_lock(&fi->lock); | |
6d3da241 JF |
1655 | for (i = 0; i < FIRQ_LIST_COUNT; i++) { |
1656 | list_for_each_entry(inti, &fi->lists[i], list) { | |
1657 | if (n == max_irqs) { | |
1658 | /* signal userspace to try again */ | |
1659 | ret = -ENOMEM; | |
1660 | goto out; | |
1661 | } | |
1662 | inti_to_irq(inti, &buf[n]); | |
1663 | n++; | |
1664 | } | |
1665 | } | |
1666 | if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) { | |
94aa033e | 1667 | if (n == max_irqs) { |
c05c4186 JF |
1668 | /* signal userspace to try again */ |
1669 | ret = -ENOMEM; | |
6d3da241 | 1670 | goto out; |
c05c4186 | 1671 | } |
6d3da241 JF |
1672 | irq = (struct kvm_s390_irq *) &buf[n]; |
1673 | irq->type = KVM_S390_INT_SERVICE; | |
1674 | irq->u.ext = fi->srv_signal; | |
c05c4186 JF |
1675 | n++; |
1676 | } | |
6d3da241 JF |
1677 | if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
1678 | if (n == max_irqs) { | |
1679 | /* signal userspace to try again */ | |
1680 | ret = -ENOMEM; | |
1681 | goto out; | |
1682 | } | |
1683 | irq = (struct kvm_s390_irq *) &buf[n]; | |
1684 | irq->type = KVM_S390_MCHK; | |
1685 | irq->u.mchk = fi->mchk; | |
1686 | n++; | |
1687 | } | |
1688 | ||
1689 | out: | |
c05c4186 | 1690 | spin_unlock(&fi->lock); |
94aa033e JF |
1691 | if (!ret && n > 0) { |
1692 | if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n)) | |
1693 | ret = -EFAULT; | |
1694 | } | |
1695 | vfree(buf); | |
c05c4186 JF |
1696 | |
1697 | return ret < 0 ? ret : n; | |
1698 | } | |
1699 | ||
1700 | static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) | |
1701 | { | |
1702 | int r; | |
1703 | ||
1704 | switch (attr->group) { | |
1705 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
94aa033e | 1706 | r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr, |
c05c4186 JF |
1707 | attr->attr); |
1708 | break; | |
1709 | default: | |
1710 | r = -EINVAL; | |
1711 | } | |
1712 | ||
1713 | return r; | |
1714 | } | |
1715 | ||
1716 | static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, | |
1717 | u64 addr) | |
1718 | { | |
1719 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1720 | void *target = NULL; | |
1721 | void __user *source; | |
1722 | u64 size; | |
1723 | ||
1724 | if (get_user(inti->type, (u64 __user *)addr)) | |
1725 | return -EFAULT; | |
1726 | ||
1727 | switch (inti->type) { | |
3c038e6b DD |
1728 | case KVM_S390_INT_PFAULT_INIT: |
1729 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1730 | case KVM_S390_INT_VIRTIO: |
1731 | case KVM_S390_INT_SERVICE: | |
1732 | target = (void *) &inti->ext; | |
1733 | source = &uptr->u.ext; | |
1734 | size = sizeof(inti->ext); | |
1735 | break; | |
1736 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1737 | target = (void *) &inti->io; | |
1738 | source = &uptr->u.io; | |
1739 | size = sizeof(inti->io); | |
1740 | break; | |
1741 | case KVM_S390_MCHK: | |
1742 | target = (void *) &inti->mchk; | |
1743 | source = &uptr->u.mchk; | |
1744 | size = sizeof(inti->mchk); | |
1745 | break; | |
1746 | default: | |
1747 | return -EINVAL; | |
1748 | } | |
1749 | ||
1750 | if (copy_from_user(target, source, size)) | |
1751 | return -EFAULT; | |
1752 | ||
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | static int enqueue_floating_irq(struct kvm_device *dev, | |
1757 | struct kvm_device_attr *attr) | |
1758 | { | |
1759 | struct kvm_s390_interrupt_info *inti = NULL; | |
1760 | int r = 0; | |
1761 | int len = attr->attr; | |
1762 | ||
1763 | if (len % sizeof(struct kvm_s390_irq) != 0) | |
1764 | return -EINVAL; | |
1765 | else if (len > KVM_S390_FLIC_MAX_BUFFER) | |
1766 | return -EINVAL; | |
1767 | ||
1768 | while (len >= sizeof(struct kvm_s390_irq)) { | |
1769 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
1770 | if (!inti) | |
1771 | return -ENOMEM; | |
1772 | ||
1773 | r = copy_irq_from_user(inti, attr->addr); | |
1774 | if (r) { | |
1775 | kfree(inti); | |
1776 | return r; | |
1777 | } | |
a91b8ebe JF |
1778 | r = __inject_vm(dev->kvm, inti); |
1779 | if (r) { | |
1780 | kfree(inti); | |
1781 | return r; | |
1782 | } | |
c05c4186 JF |
1783 | len -= sizeof(struct kvm_s390_irq); |
1784 | attr->addr += sizeof(struct kvm_s390_irq); | |
1785 | } | |
1786 | ||
1787 | return r; | |
1788 | } | |
1789 | ||
841b91c5 CH |
1790 | static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
1791 | { | |
1792 | if (id >= MAX_S390_IO_ADAPTERS) | |
1793 | return NULL; | |
1794 | return kvm->arch.adapters[id]; | |
1795 | } | |
1796 | ||
1797 | static int register_io_adapter(struct kvm_device *dev, | |
1798 | struct kvm_device_attr *attr) | |
1799 | { | |
1800 | struct s390_io_adapter *adapter; | |
1801 | struct kvm_s390_io_adapter adapter_info; | |
1802 | ||
1803 | if (copy_from_user(&adapter_info, | |
1804 | (void __user *)attr->addr, sizeof(adapter_info))) | |
1805 | return -EFAULT; | |
1806 | ||
1807 | if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || | |
1808 | (dev->kvm->arch.adapters[adapter_info.id] != NULL)) | |
1809 | return -EINVAL; | |
1810 | ||
1811 | adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); | |
1812 | if (!adapter) | |
1813 | return -ENOMEM; | |
1814 | ||
1815 | INIT_LIST_HEAD(&adapter->maps); | |
1816 | init_rwsem(&adapter->maps_lock); | |
1817 | atomic_set(&adapter->nr_maps, 0); | |
1818 | adapter->id = adapter_info.id; | |
1819 | adapter->isc = adapter_info.isc; | |
1820 | adapter->maskable = adapter_info.maskable; | |
1821 | adapter->masked = false; | |
1822 | adapter->swap = adapter_info.swap; | |
1823 | dev->kvm->arch.adapters[adapter->id] = adapter; | |
1824 | ||
1825 | return 0; | |
1826 | } | |
1827 | ||
1828 | int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) | |
1829 | { | |
1830 | int ret; | |
1831 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1832 | ||
1833 | if (!adapter || !adapter->maskable) | |
1834 | return -EINVAL; | |
1835 | ret = adapter->masked; | |
1836 | adapter->masked = masked; | |
1837 | return ret; | |
1838 | } | |
1839 | ||
1840 | static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) | |
1841 | { | |
1842 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1843 | struct s390_map_info *map; | |
1844 | int ret; | |
1845 | ||
1846 | if (!adapter || !addr) | |
1847 | return -EINVAL; | |
1848 | ||
1849 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
1850 | if (!map) { | |
1851 | ret = -ENOMEM; | |
1852 | goto out; | |
1853 | } | |
1854 | INIT_LIST_HEAD(&map->list); | |
1855 | map->guest_addr = addr; | |
6e0a0431 | 1856 | map->addr = gmap_translate(kvm->arch.gmap, addr); |
841b91c5 CH |
1857 | if (map->addr == -EFAULT) { |
1858 | ret = -EFAULT; | |
1859 | goto out; | |
1860 | } | |
1861 | ret = get_user_pages_fast(map->addr, 1, 1, &map->page); | |
1862 | if (ret < 0) | |
1863 | goto out; | |
1864 | BUG_ON(ret != 1); | |
1865 | down_write(&adapter->maps_lock); | |
1866 | if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { | |
1867 | list_add_tail(&map->list, &adapter->maps); | |
1868 | ret = 0; | |
1869 | } else { | |
1870 | put_page(map->page); | |
1871 | ret = -EINVAL; | |
1872 | } | |
1873 | up_write(&adapter->maps_lock); | |
1874 | out: | |
1875 | if (ret) | |
1876 | kfree(map); | |
1877 | return ret; | |
1878 | } | |
1879 | ||
1880 | static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) | |
1881 | { | |
1882 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1883 | struct s390_map_info *map, *tmp; | |
1884 | int found = 0; | |
1885 | ||
1886 | if (!adapter || !addr) | |
1887 | return -EINVAL; | |
1888 | ||
1889 | down_write(&adapter->maps_lock); | |
1890 | list_for_each_entry_safe(map, tmp, &adapter->maps, list) { | |
1891 | if (map->guest_addr == addr) { | |
1892 | found = 1; | |
1893 | atomic_dec(&adapter->nr_maps); | |
1894 | list_del(&map->list); | |
1895 | put_page(map->page); | |
1896 | kfree(map); | |
1897 | break; | |
1898 | } | |
1899 | } | |
1900 | up_write(&adapter->maps_lock); | |
1901 | ||
1902 | return found ? 0 : -EINVAL; | |
1903 | } | |
1904 | ||
1905 | void kvm_s390_destroy_adapters(struct kvm *kvm) | |
1906 | { | |
1907 | int i; | |
1908 | struct s390_map_info *map, *tmp; | |
1909 | ||
1910 | for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { | |
1911 | if (!kvm->arch.adapters[i]) | |
1912 | continue; | |
1913 | list_for_each_entry_safe(map, tmp, | |
1914 | &kvm->arch.adapters[i]->maps, list) { | |
1915 | list_del(&map->list); | |
1916 | put_page(map->page); | |
1917 | kfree(map); | |
1918 | } | |
1919 | kfree(kvm->arch.adapters[i]); | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | static int modify_io_adapter(struct kvm_device *dev, | |
1924 | struct kvm_device_attr *attr) | |
1925 | { | |
1926 | struct kvm_s390_io_adapter_req req; | |
1927 | struct s390_io_adapter *adapter; | |
1928 | int ret; | |
1929 | ||
1930 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
1931 | return -EFAULT; | |
1932 | ||
1933 | adapter = get_io_adapter(dev->kvm, req.id); | |
1934 | if (!adapter) | |
1935 | return -EINVAL; | |
1936 | switch (req.type) { | |
1937 | case KVM_S390_IO_ADAPTER_MASK: | |
1938 | ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); | |
1939 | if (ret > 0) | |
1940 | ret = 0; | |
1941 | break; | |
1942 | case KVM_S390_IO_ADAPTER_MAP: | |
1943 | ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); | |
1944 | break; | |
1945 | case KVM_S390_IO_ADAPTER_UNMAP: | |
1946 | ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); | |
1947 | break; | |
1948 | default: | |
1949 | ret = -EINVAL; | |
1950 | } | |
1951 | ||
1952 | return ret; | |
1953 | } | |
1954 | ||
c05c4186 JF |
1955 | static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
1956 | { | |
1957 | int r = 0; | |
3c038e6b DD |
1958 | unsigned int i; |
1959 | struct kvm_vcpu *vcpu; | |
c05c4186 JF |
1960 | |
1961 | switch (attr->group) { | |
1962 | case KVM_DEV_FLIC_ENQUEUE: | |
1963 | r = enqueue_floating_irq(dev, attr); | |
1964 | break; | |
1965 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
67335e63 | 1966 | kvm_s390_clear_float_irqs(dev->kvm); |
c05c4186 | 1967 | break; |
3c038e6b DD |
1968 | case KVM_DEV_FLIC_APF_ENABLE: |
1969 | dev->kvm->arch.gmap->pfault_enabled = 1; | |
1970 | break; | |
1971 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
1972 | dev->kvm->arch.gmap->pfault_enabled = 0; | |
1973 | /* | |
1974 | * Make sure no async faults are in transition when | |
1975 | * clearing the queues. So we don't need to worry | |
1976 | * about late coming workers. | |
1977 | */ | |
1978 | synchronize_srcu(&dev->kvm->srcu); | |
1979 | kvm_for_each_vcpu(i, vcpu, dev->kvm) | |
1980 | kvm_clear_async_pf_completion_queue(vcpu); | |
1981 | break; | |
841b91c5 CH |
1982 | case KVM_DEV_FLIC_ADAPTER_REGISTER: |
1983 | r = register_io_adapter(dev, attr); | |
1984 | break; | |
1985 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
1986 | r = modify_io_adapter(dev, attr); | |
1987 | break; | |
c05c4186 JF |
1988 | default: |
1989 | r = -EINVAL; | |
1990 | } | |
1991 | ||
1992 | return r; | |
1993 | } | |
1994 | ||
1995 | static int flic_create(struct kvm_device *dev, u32 type) | |
1996 | { | |
1997 | if (!dev) | |
1998 | return -EINVAL; | |
1999 | if (dev->kvm->arch.flic) | |
2000 | return -EINVAL; | |
2001 | dev->kvm->arch.flic = dev; | |
2002 | return 0; | |
2003 | } | |
2004 | ||
2005 | static void flic_destroy(struct kvm_device *dev) | |
2006 | { | |
2007 | dev->kvm->arch.flic = NULL; | |
2008 | kfree(dev); | |
2009 | } | |
2010 | ||
2011 | /* s390 floating irq controller (flic) */ | |
2012 | struct kvm_device_ops kvm_flic_ops = { | |
2013 | .name = "kvm-flic", | |
2014 | .get_attr = flic_get_attr, | |
2015 | .set_attr = flic_set_attr, | |
2016 | .create = flic_create, | |
2017 | .destroy = flic_destroy, | |
2018 | }; | |
84223598 CH |
2019 | |
2020 | static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) | |
2021 | { | |
2022 | unsigned long bit; | |
2023 | ||
2024 | bit = bit_nr + (addr % PAGE_SIZE) * 8; | |
2025 | ||
2026 | return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; | |
2027 | } | |
2028 | ||
2029 | static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, | |
2030 | u64 addr) | |
2031 | { | |
2032 | struct s390_map_info *map; | |
2033 | ||
2034 | if (!adapter) | |
2035 | return NULL; | |
2036 | ||
2037 | list_for_each_entry(map, &adapter->maps, list) { | |
2038 | if (map->guest_addr == addr) | |
2039 | return map; | |
2040 | } | |
2041 | return NULL; | |
2042 | } | |
2043 | ||
2044 | static int adapter_indicators_set(struct kvm *kvm, | |
2045 | struct s390_io_adapter *adapter, | |
2046 | struct kvm_s390_adapter_int *adapter_int) | |
2047 | { | |
2048 | unsigned long bit; | |
2049 | int summary_set, idx; | |
2050 | struct s390_map_info *info; | |
2051 | void *map; | |
2052 | ||
2053 | info = get_map_info(adapter, adapter_int->ind_addr); | |
2054 | if (!info) | |
2055 | return -1; | |
2056 | map = page_address(info->page); | |
2057 | bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); | |
2058 | set_bit(bit, map); | |
2059 | idx = srcu_read_lock(&kvm->srcu); | |
2060 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2061 | set_page_dirty_lock(info->page); | |
2062 | info = get_map_info(adapter, adapter_int->summary_addr); | |
2063 | if (!info) { | |
2064 | srcu_read_unlock(&kvm->srcu, idx); | |
2065 | return -1; | |
2066 | } | |
2067 | map = page_address(info->page); | |
2068 | bit = get_ind_bit(info->addr, adapter_int->summary_offset, | |
2069 | adapter->swap); | |
2070 | summary_set = test_and_set_bit(bit, map); | |
2071 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2072 | set_page_dirty_lock(info->page); | |
2073 | srcu_read_unlock(&kvm->srcu, idx); | |
2074 | return summary_set ? 0 : 1; | |
2075 | } | |
2076 | ||
2077 | /* | |
2078 | * < 0 - not injected due to error | |
2079 | * = 0 - coalesced, summary indicator already active | |
2080 | * > 0 - injected interrupt | |
2081 | */ | |
2082 | static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, | |
2083 | struct kvm *kvm, int irq_source_id, int level, | |
2084 | bool line_status) | |
2085 | { | |
2086 | int ret; | |
2087 | struct s390_io_adapter *adapter; | |
2088 | ||
2089 | /* We're only interested in the 0->1 transition. */ | |
2090 | if (!level) | |
2091 | return 0; | |
2092 | adapter = get_io_adapter(kvm, e->adapter.adapter_id); | |
2093 | if (!adapter) | |
2094 | return -1; | |
2095 | down_read(&adapter->maps_lock); | |
2096 | ret = adapter_indicators_set(kvm, adapter, &e->adapter); | |
2097 | up_read(&adapter->maps_lock); | |
2098 | if ((ret > 0) && !adapter->masked) { | |
2099 | struct kvm_s390_interrupt s390int = { | |
2100 | .type = KVM_S390_INT_IO(1, 0, 0, 0), | |
2101 | .parm = 0, | |
2102 | .parm64 = (adapter->isc << 27) | 0x80000000, | |
2103 | }; | |
2104 | ret = kvm_s390_inject_vm(kvm, &s390int); | |
2105 | if (ret == 0) | |
2106 | ret = 1; | |
2107 | } | |
2108 | return ret; | |
2109 | } | |
2110 | ||
8ba918d4 | 2111 | int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
84223598 CH |
2112 | const struct kvm_irq_routing_entry *ue) |
2113 | { | |
2114 | int ret; | |
2115 | ||
2116 | switch (ue->type) { | |
2117 | case KVM_IRQ_ROUTING_S390_ADAPTER: | |
2118 | e->set = set_adapter_int; | |
2119 | e->adapter.summary_addr = ue->u.adapter.summary_addr; | |
2120 | e->adapter.ind_addr = ue->u.adapter.ind_addr; | |
2121 | e->adapter.summary_offset = ue->u.adapter.summary_offset; | |
2122 | e->adapter.ind_offset = ue->u.adapter.ind_offset; | |
2123 | e->adapter.adapter_id = ue->u.adapter.adapter_id; | |
2124 | ret = 0; | |
2125 | break; | |
2126 | default: | |
2127 | ret = -EINVAL; | |
2128 | } | |
2129 | ||
2130 | return ret; | |
2131 | } | |
2132 | ||
2133 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, | |
2134 | int irq_source_id, int level, bool line_status) | |
2135 | { | |
2136 | return -EINVAL; | |
2137 | } | |
816c7667 JF |
2138 | |
2139 | int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len) | |
2140 | { | |
2141 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2142 | struct kvm_s390_irq *buf; | |
2143 | int r = 0; | |
2144 | int n; | |
2145 | ||
2146 | buf = vmalloc(len); | |
2147 | if (!buf) | |
2148 | return -ENOMEM; | |
2149 | ||
2150 | if (copy_from_user((void *) buf, irqstate, len)) { | |
2151 | r = -EFAULT; | |
2152 | goto out_free; | |
2153 | } | |
2154 | ||
2155 | /* | |
2156 | * Don't allow setting the interrupt state | |
2157 | * when there are already interrupts pending | |
2158 | */ | |
2159 | spin_lock(&li->lock); | |
2160 | if (li->pending_irqs) { | |
2161 | r = -EBUSY; | |
2162 | goto out_unlock; | |
2163 | } | |
2164 | ||
2165 | for (n = 0; n < len / sizeof(*buf); n++) { | |
2166 | r = do_inject_vcpu(vcpu, &buf[n]); | |
2167 | if (r) | |
2168 | break; | |
2169 | } | |
2170 | ||
2171 | out_unlock: | |
2172 | spin_unlock(&li->lock); | |
2173 | out_free: | |
2174 | vfree(buf); | |
2175 | ||
2176 | return r; | |
2177 | } | |
2178 | ||
2179 | static void store_local_irq(struct kvm_s390_local_interrupt *li, | |
2180 | struct kvm_s390_irq *irq, | |
2181 | unsigned long irq_type) | |
2182 | { | |
2183 | switch (irq_type) { | |
2184 | case IRQ_PEND_MCHK_EX: | |
2185 | case IRQ_PEND_MCHK_REP: | |
2186 | irq->type = KVM_S390_MCHK; | |
2187 | irq->u.mchk = li->irq.mchk; | |
2188 | break; | |
2189 | case IRQ_PEND_PROG: | |
2190 | irq->type = KVM_S390_PROGRAM_INT; | |
2191 | irq->u.pgm = li->irq.pgm; | |
2192 | break; | |
2193 | case IRQ_PEND_PFAULT_INIT: | |
2194 | irq->type = KVM_S390_INT_PFAULT_INIT; | |
2195 | irq->u.ext = li->irq.ext; | |
2196 | break; | |
2197 | case IRQ_PEND_EXT_EXTERNAL: | |
2198 | irq->type = KVM_S390_INT_EXTERNAL_CALL; | |
2199 | irq->u.extcall = li->irq.extcall; | |
2200 | break; | |
2201 | case IRQ_PEND_EXT_CLOCK_COMP: | |
2202 | irq->type = KVM_S390_INT_CLOCK_COMP; | |
2203 | break; | |
2204 | case IRQ_PEND_EXT_CPU_TIMER: | |
2205 | irq->type = KVM_S390_INT_CPU_TIMER; | |
2206 | break; | |
2207 | case IRQ_PEND_SIGP_STOP: | |
2208 | irq->type = KVM_S390_SIGP_STOP; | |
2209 | irq->u.stop = li->irq.stop; | |
2210 | break; | |
2211 | case IRQ_PEND_RESTART: | |
2212 | irq->type = KVM_S390_RESTART; | |
2213 | break; | |
2214 | case IRQ_PEND_SET_PREFIX: | |
2215 | irq->type = KVM_S390_SIGP_SET_PREFIX; | |
2216 | irq->u.prefix = li->irq.prefix; | |
2217 | break; | |
2218 | } | |
2219 | } | |
2220 | ||
2221 | int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len) | |
2222 | { | |
2223 | uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
2224 | unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)]; | |
2225 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2226 | unsigned long pending_irqs; | |
2227 | struct kvm_s390_irq irq; | |
2228 | unsigned long irq_type; | |
2229 | int cpuaddr; | |
2230 | int n = 0; | |
2231 | ||
2232 | spin_lock(&li->lock); | |
2233 | pending_irqs = li->pending_irqs; | |
2234 | memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending, | |
2235 | sizeof(sigp_emerg_pending)); | |
2236 | spin_unlock(&li->lock); | |
2237 | ||
2238 | for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) { | |
2239 | memset(&irq, 0, sizeof(irq)); | |
2240 | if (irq_type == IRQ_PEND_EXT_EMERGENCY) | |
2241 | continue; | |
2242 | if (n + sizeof(irq) > len) | |
2243 | return -ENOBUFS; | |
2244 | store_local_irq(&vcpu->arch.local_int, &irq, irq_type); | |
2245 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2246 | return -EFAULT; | |
2247 | n += sizeof(irq); | |
2248 | } | |
2249 | ||
2250 | if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) { | |
2251 | for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) { | |
2252 | memset(&irq, 0, sizeof(irq)); | |
2253 | if (n + sizeof(irq) > len) | |
2254 | return -ENOBUFS; | |
2255 | irq.type = KVM_S390_INT_EMERGENCY; | |
2256 | irq.u.emerg.code = cpuaddr; | |
2257 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2258 | return -EFAULT; | |
2259 | n += sizeof(irq); | |
2260 | } | |
2261 | } | |
2262 | ||
2263 | if ((sigp_ctrl & SIGP_CTRL_C) && | |
2264 | (atomic_read(&vcpu->arch.sie_block->cpuflags) & | |
2265 | CPUSTAT_ECALL_PEND)) { | |
2266 | if (n + sizeof(irq) > len) | |
2267 | return -ENOBUFS; | |
2268 | memset(&irq, 0, sizeof(irq)); | |
2269 | irq.type = KVM_S390_INT_EXTERNAL_CALL; | |
2270 | irq.u.extcall.code = sigp_ctrl & SIGP_CTRL_SCN_MASK; | |
2271 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2272 | return -EFAULT; | |
2273 | n += sizeof(irq); | |
2274 | } | |
2275 | ||
2276 | return n; | |
2277 | } |