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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 | { | |
54 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || | |
55 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || | |
56 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) | |
57 | return 0; | |
58 | return 1; | |
59 | } | |
60 | ||
bb78c5ec DH |
61 | static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
62 | { | |
63 | if (psw_extint_disabled(vcpu) || | |
64 | !(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
65 | return 0; | |
f71d0dc5 DH |
66 | if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
67 | /* No timer interrupts when single stepping */ | |
68 | return 0; | |
bb78c5ec DH |
69 | return 1; |
70 | } | |
71 | ||
b4aec925 DH |
72 | static int ckc_irq_pending(struct kvm_vcpu *vcpu) |
73 | { | |
fdf03650 | 74 | preempt_disable(); |
b4aec925 | 75 | if (!(vcpu->arch.sie_block->ckc < |
fdf03650 FZ |
76 | get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) { |
77 | preempt_enable(); | |
b4aec925 | 78 | return 0; |
fdf03650 FZ |
79 | } |
80 | preempt_enable(); | |
b4aec925 DH |
81 | return ckc_interrupts_enabled(vcpu); |
82 | } | |
83 | ||
84 | static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu) | |
85 | { | |
86 | return !psw_extint_disabled(vcpu) && | |
87 | (vcpu->arch.sie_block->gcr[0] & 0x400ul); | |
88 | } | |
89 | ||
90 | static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu) | |
91 | { | |
92 | return (vcpu->arch.sie_block->cputm >> 63) && | |
93 | cpu_timer_interrupts_enabled(vcpu); | |
94 | } | |
95 | ||
6d3da241 | 96 | static inline int is_ioirq(unsigned long irq_type) |
79fd50c6 | 97 | { |
6d3da241 JF |
98 | return ((irq_type >= IRQ_PEND_IO_ISC_0) && |
99 | (irq_type <= IRQ_PEND_IO_ISC_7)); | |
100 | } | |
79fd50c6 | 101 | |
6d3da241 JF |
102 | static uint64_t isc_to_isc_bits(int isc) |
103 | { | |
79fd50c6 CH |
104 | return (0x80 >> isc) << 24; |
105 | } | |
106 | ||
6d3da241 | 107 | static inline u8 int_word_to_isc(u32 int_word) |
ba5c1e9b | 108 | { |
6d3da241 JF |
109 | return (int_word & 0x38000000) >> 27; |
110 | } | |
111 | ||
112 | static inline unsigned long pending_floating_irqs(struct kvm_vcpu *vcpu) | |
113 | { | |
114 | return vcpu->kvm->arch.float_int.pending_irqs; | |
ba5c1e9b CO |
115 | } |
116 | ||
383d0b05 JF |
117 | static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu) |
118 | { | |
119 | return vcpu->arch.local_int.pending_irqs; | |
120 | } | |
121 | ||
6d3da241 JF |
122 | static unsigned long disable_iscs(struct kvm_vcpu *vcpu, |
123 | unsigned long active_mask) | |
124 | { | |
125 | int i; | |
126 | ||
127 | for (i = 0; i <= MAX_ISC; i++) | |
128 | if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i))) | |
129 | active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i)); | |
130 | ||
131 | return active_mask; | |
132 | } | |
133 | ||
134 | static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu) | |
383d0b05 | 135 | { |
6d3da241 JF |
136 | unsigned long active_mask; |
137 | ||
138 | active_mask = pending_local_irqs(vcpu); | |
139 | active_mask |= pending_floating_irqs(vcpu); | |
ffeca0ae JF |
140 | if (!active_mask) |
141 | return 0; | |
383d0b05 JF |
142 | |
143 | if (psw_extint_disabled(vcpu)) | |
144 | active_mask &= ~IRQ_PEND_EXT_MASK; | |
6d3da241 JF |
145 | if (psw_ioint_disabled(vcpu)) |
146 | active_mask &= ~IRQ_PEND_IO_MASK; | |
147 | else | |
148 | active_mask = disable_iscs(vcpu, active_mask); | |
383d0b05 JF |
149 | if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul)) |
150 | __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask); | |
151 | if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul)) | |
152 | __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask); | |
153 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
154 | __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask); | |
155 | if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul)) | |
156 | __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask); | |
6d3da241 JF |
157 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) |
158 | __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask); | |
383d0b05 JF |
159 | if (psw_mchk_disabled(vcpu)) |
160 | active_mask &= ~IRQ_PEND_MCHK_MASK; | |
6d3da241 JF |
161 | if (!(vcpu->arch.sie_block->gcr[14] & |
162 | vcpu->kvm->arch.float_int.mchk.cr14)) | |
163 | __clear_bit(IRQ_PEND_MCHK_REP, &active_mask); | |
383d0b05 | 164 | |
6cddd432 DH |
165 | /* |
166 | * STOP irqs will never be actively delivered. They are triggered via | |
167 | * intercept requests and cleared when the stop intercept is performed. | |
168 | */ | |
169 | __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask); | |
170 | ||
383d0b05 JF |
171 | return active_mask; |
172 | } | |
173 | ||
ba5c1e9b CO |
174 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
175 | { | |
805de8f4 | 176 | atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
177 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); |
178 | } | |
179 | ||
180 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
181 | { | |
805de8f4 | 182 | atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
183 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); |
184 | } | |
185 | ||
186 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
187 | { | |
805de8f4 PZ |
188 | atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, |
189 | &vcpu->arch.sie_block->cpuflags); | |
ba5c1e9b | 190 | vcpu->arch.sie_block->lctl = 0x0000; |
27291e21 DH |
191 | vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
192 | ||
193 | if (guestdbg_enabled(vcpu)) { | |
194 | vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | | |
195 | LCTL_CR10 | LCTL_CR11); | |
196 | vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); | |
197 | } | |
ba5c1e9b CO |
198 | } |
199 | ||
200 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
201 | { | |
805de8f4 | 202 | atomic_or(flag, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
203 | } |
204 | ||
6d3da241 JF |
205 | static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) |
206 | { | |
207 | if (!(pending_floating_irqs(vcpu) & IRQ_PEND_IO_MASK)) | |
208 | return; | |
209 | else if (psw_ioint_disabled(vcpu)) | |
210 | __set_cpuflag(vcpu, CPUSTAT_IO_INT); | |
211 | else | |
212 | vcpu->arch.sie_block->lctl |= LCTL_CR6; | |
213 | } | |
214 | ||
383d0b05 JF |
215 | static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) |
216 | { | |
217 | if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK)) | |
218 | return; | |
219 | if (psw_extint_disabled(vcpu)) | |
220 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
221 | else | |
222 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
223 | } | |
224 | ||
225 | static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) | |
226 | { | |
227 | if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK)) | |
228 | return; | |
229 | if (psw_mchk_disabled(vcpu)) | |
230 | vcpu->arch.sie_block->ictl |= ICTL_LPSW; | |
231 | else | |
232 | vcpu->arch.sie_block->lctl |= LCTL_CR14; | |
233 | } | |
234 | ||
6cddd432 DH |
235 | static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu) |
236 | { | |
237 | if (kvm_s390_is_stop_irq_pending(vcpu)) | |
238 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
239 | } | |
240 | ||
6d3da241 JF |
241 | /* Set interception request for non-deliverable interrupts */ |
242 | static void set_intercept_indicators(struct kvm_vcpu *vcpu) | |
383d0b05 | 243 | { |
6d3da241 | 244 | set_intercept_indicators_io(vcpu); |
383d0b05 JF |
245 | set_intercept_indicators_ext(vcpu); |
246 | set_intercept_indicators_mchk(vcpu); | |
6cddd432 | 247 | set_intercept_indicators_stop(vcpu); |
383d0b05 JF |
248 | } |
249 | ||
8a2ef71b JF |
250 | static u16 get_ilc(struct kvm_vcpu *vcpu) |
251 | { | |
8a2ef71b JF |
252 | switch (vcpu->arch.sie_block->icptcode) { |
253 | case ICPT_INST: | |
254 | case ICPT_INSTPROGI: | |
255 | case ICPT_OPEREXC: | |
256 | case ICPT_PARTEXEC: | |
257 | case ICPT_IOINST: | |
258 | /* last instruction only stored for these icptcodes */ | |
33b412ac | 259 | return insn_length(vcpu->arch.sie_block->ipa >> 8); |
8a2ef71b JF |
260 | case ICPT_PROGI: |
261 | return vcpu->arch.sie_block->pgmilc; | |
262 | default: | |
263 | return 0; | |
264 | } | |
265 | } | |
266 | ||
0fb97abe JF |
267 | static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) |
268 | { | |
383d0b05 | 269 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
270 | int rc; |
271 | ||
272 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, | |
273 | 0, 0); | |
274 | ||
275 | rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, | |
276 | (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 277 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
278 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
279 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
280 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
281 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 282 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
99e20009 | 283 | return rc ? -EFAULT : 0; |
0fb97abe JF |
284 | } |
285 | ||
286 | static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) | |
287 | { | |
383d0b05 | 288 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
289 | int rc; |
290 | ||
291 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, | |
292 | 0, 0); | |
293 | ||
294 | rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP, | |
295 | (u16 __user *)__LC_EXT_INT_CODE); | |
467fc298 | 296 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
297 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
298 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
299 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
300 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 301 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
99e20009 | 302 | return rc ? -EFAULT : 0; |
0fb97abe JF |
303 | } |
304 | ||
383d0b05 | 305 | static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) |
0fb97abe | 306 | { |
383d0b05 JF |
307 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
308 | struct kvm_s390_ext_info ext; | |
0fb97abe JF |
309 | int rc; |
310 | ||
383d0b05 JF |
311 | spin_lock(&li->lock); |
312 | ext = li->irq.ext; | |
313 | clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
314 | li->irq.ext.ext_params2 = 0; | |
315 | spin_unlock(&li->lock); | |
316 | ||
3f24ba15 CB |
317 | VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx", |
318 | ext.ext_params2); | |
0fb97abe JF |
319 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
320 | KVM_S390_INT_PFAULT_INIT, | |
383d0b05 | 321 | 0, ext.ext_params2); |
0fb97abe JF |
322 | |
323 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE); | |
324 | rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); | |
325 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
326 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
327 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
328 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 329 | rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); |
99e20009 | 330 | return rc ? -EFAULT : 0; |
0fb97abe JF |
331 | } |
332 | ||
383d0b05 | 333 | static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) |
0fb97abe | 334 | { |
6d3da241 | 335 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
383d0b05 | 336 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
6d3da241 | 337 | struct kvm_s390_mchk_info mchk = {}; |
bc17de7c | 338 | unsigned long adtl_status_addr; |
6d3da241 JF |
339 | int deliver = 0; |
340 | int rc = 0; | |
0fb97abe | 341 | |
6d3da241 | 342 | spin_lock(&fi->lock); |
383d0b05 | 343 | spin_lock(&li->lock); |
6d3da241 JF |
344 | if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) || |
345 | test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) { | |
346 | /* | |
347 | * If there was an exigent machine check pending, then any | |
348 | * repressible machine checks that might have been pending | |
349 | * are indicated along with it, so always clear bits for | |
350 | * repressible and exigent interrupts | |
351 | */ | |
352 | mchk = li->irq.mchk; | |
353 | clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
354 | clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
355 | memset(&li->irq.mchk, 0, sizeof(mchk)); | |
356 | deliver = 1; | |
357 | } | |
383d0b05 | 358 | /* |
6d3da241 JF |
359 | * We indicate floating repressible conditions along with |
360 | * other pending conditions. Channel Report Pending and Channel | |
361 | * Subsystem damage are the only two and and are indicated by | |
362 | * bits in mcic and masked in cr14. | |
383d0b05 | 363 | */ |
6d3da241 JF |
364 | if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
365 | mchk.mcic |= fi->mchk.mcic; | |
366 | mchk.cr14 |= fi->mchk.cr14; | |
367 | memset(&fi->mchk, 0, sizeof(mchk)); | |
368 | deliver = 1; | |
369 | } | |
383d0b05 | 370 | spin_unlock(&li->lock); |
6d3da241 | 371 | spin_unlock(&fi->lock); |
383d0b05 | 372 | |
6d3da241 | 373 | if (deliver) { |
3f24ba15 | 374 | VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx", |
6d3da241 JF |
375 | mchk.mcic); |
376 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
377 | KVM_S390_MCHK, | |
378 | mchk.cr14, mchk.mcic); | |
379 | ||
380 | rc = kvm_s390_vcpu_store_status(vcpu, | |
381 | KVM_S390_STORE_STATUS_PREFIXED); | |
382 | rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR, | |
383 | &adtl_status_addr, | |
384 | sizeof(unsigned long)); | |
385 | rc |= kvm_s390_vcpu_store_adtl_status(vcpu, | |
386 | adtl_status_addr); | |
387 | rc |= put_guest_lc(vcpu, mchk.mcic, | |
388 | (u64 __user *) __LC_MCCK_CODE); | |
389 | rc |= put_guest_lc(vcpu, mchk.failing_storage_address, | |
390 | (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); | |
391 | rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, | |
392 | &mchk.fixed_logout, | |
393 | sizeof(mchk.fixed_logout)); | |
394 | rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, | |
395 | &vcpu->arch.sie_block->gpsw, | |
396 | sizeof(psw_t)); | |
397 | rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, | |
398 | &vcpu->arch.sie_block->gpsw, | |
399 | sizeof(psw_t)); | |
400 | } | |
99e20009 | 401 | return rc ? -EFAULT : 0; |
0fb97abe JF |
402 | } |
403 | ||
404 | static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) | |
405 | { | |
383d0b05 | 406 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe JF |
407 | int rc; |
408 | ||
3f24ba15 | 409 | VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart"); |
0fb97abe JF |
410 | vcpu->stat.deliver_restart_signal++; |
411 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); | |
412 | ||
413 | rc = write_guest_lc(vcpu, | |
414 | offsetof(struct _lowcore, restart_old_psw), | |
415 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
416 | rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw), | |
417 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
383d0b05 | 418 | clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
99e20009 | 419 | return rc ? -EFAULT : 0; |
0fb97abe JF |
420 | } |
421 | ||
383d0b05 | 422 | static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) |
0fb97abe | 423 | { |
383d0b05 JF |
424 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
425 | struct kvm_s390_prefix_info prefix; | |
426 | ||
427 | spin_lock(&li->lock); | |
428 | prefix = li->irq.prefix; | |
429 | li->irq.prefix.address = 0; | |
430 | clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
431 | spin_unlock(&li->lock); | |
0fb97abe | 432 | |
0fb97abe JF |
433 | vcpu->stat.deliver_prefix_signal++; |
434 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
435 | KVM_S390_SIGP_SET_PREFIX, | |
383d0b05 | 436 | prefix.address, 0); |
0fb97abe | 437 | |
383d0b05 | 438 | kvm_s390_set_prefix(vcpu, prefix.address); |
0fb97abe JF |
439 | return 0; |
440 | } | |
441 | ||
383d0b05 | 442 | static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) |
0fb97abe | 443 | { |
383d0b05 | 444 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
0fb97abe | 445 | int rc; |
383d0b05 JF |
446 | int cpu_addr; |
447 | ||
448 | spin_lock(&li->lock); | |
449 | cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
450 | clear_bit(cpu_addr, li->sigp_emerg_pending); | |
451 | if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) | |
452 | clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); | |
453 | spin_unlock(&li->lock); | |
0fb97abe | 454 | |
3f24ba15 | 455 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg"); |
0fb97abe | 456 | vcpu->stat.deliver_emergency_signal++; |
383d0b05 JF |
457 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
458 | cpu_addr, 0); | |
0fb97abe JF |
459 | |
460 | rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, | |
461 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 462 | rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
463 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
464 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
465 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
466 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 467 | return rc ? -EFAULT : 0; |
0fb97abe JF |
468 | } |
469 | ||
383d0b05 | 470 | static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) |
0fb97abe | 471 | { |
383d0b05 JF |
472 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
473 | struct kvm_s390_extcall_info extcall; | |
0fb97abe JF |
474 | int rc; |
475 | ||
383d0b05 JF |
476 | spin_lock(&li->lock); |
477 | extcall = li->irq.extcall; | |
478 | li->irq.extcall.code = 0; | |
479 | clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); | |
480 | spin_unlock(&li->lock); | |
481 | ||
3f24ba15 | 482 | VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call"); |
0fb97abe JF |
483 | vcpu->stat.deliver_external_call++; |
484 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
485 | KVM_S390_INT_EXTERNAL_CALL, | |
383d0b05 | 486 | extcall.code, 0); |
0fb97abe JF |
487 | |
488 | rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, | |
489 | (u16 *)__LC_EXT_INT_CODE); | |
383d0b05 | 490 | rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
491 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
492 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
493 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, | |
494 | sizeof(psw_t)); | |
99e20009 | 495 | return rc ? -EFAULT : 0; |
0fb97abe JF |
496 | } |
497 | ||
383d0b05 | 498 | static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) |
8712836b | 499 | { |
383d0b05 JF |
500 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
501 | struct kvm_s390_pgm_info pgm_info; | |
a9a846fd | 502 | int rc = 0, nullifying = false; |
8a2ef71b | 503 | u16 ilc = get_ilc(vcpu); |
8712836b | 504 | |
383d0b05 JF |
505 | spin_lock(&li->lock); |
506 | pgm_info = li->irq.pgm; | |
507 | clear_bit(IRQ_PEND_PROG, &li->pending_irqs); | |
508 | memset(&li->irq.pgm, 0, sizeof(pgm_info)); | |
509 | spin_unlock(&li->lock); | |
510 | ||
3f24ba15 | 511 | VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilc:%d", |
383d0b05 | 512 | pgm_info.code, ilc); |
0fb97abe JF |
513 | vcpu->stat.deliver_program_int++; |
514 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
383d0b05 | 515 | pgm_info.code, 0); |
0fb97abe | 516 | |
383d0b05 | 517 | switch (pgm_info.code & ~PGM_PER) { |
8712836b DH |
518 | case PGM_AFX_TRANSLATION: |
519 | case PGM_ASX_TRANSLATION: | |
520 | case PGM_EX_TRANSLATION: | |
521 | case PGM_LFX_TRANSLATION: | |
522 | case PGM_LSTE_SEQUENCE: | |
523 | case PGM_LSX_TRANSLATION: | |
524 | case PGM_LX_TRANSLATION: | |
525 | case PGM_PRIMARY_AUTHORITY: | |
526 | case PGM_SECONDARY_AUTHORITY: | |
a9a846fd TH |
527 | nullifying = true; |
528 | /* fall through */ | |
8712836b | 529 | case PGM_SPACE_SWITCH: |
383d0b05 | 530 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b DH |
531 | (u64 *)__LC_TRANS_EXC_CODE); |
532 | break; | |
533 | case PGM_ALEN_TRANSLATION: | |
534 | case PGM_ALE_SEQUENCE: | |
535 | case PGM_ASTE_INSTANCE: | |
536 | case PGM_ASTE_SEQUENCE: | |
537 | case PGM_ASTE_VALIDITY: | |
538 | case PGM_EXTENDED_AUTHORITY: | |
383d0b05 | 539 | rc = put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 540 | (u8 *)__LC_EXC_ACCESS_ID); |
a9a846fd | 541 | nullifying = true; |
8712836b DH |
542 | break; |
543 | case PGM_ASCE_TYPE: | |
544 | case PGM_PAGE_TRANSLATION: | |
545 | case PGM_REGION_FIRST_TRANS: | |
546 | case PGM_REGION_SECOND_TRANS: | |
547 | case PGM_REGION_THIRD_TRANS: | |
548 | case PGM_SEGMENT_TRANSLATION: | |
383d0b05 | 549 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 550 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 551 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b | 552 | (u8 *)__LC_EXC_ACCESS_ID); |
383d0b05 | 553 | rc |= put_guest_lc(vcpu, pgm_info.op_access_id, |
8712836b | 554 | (u8 *)__LC_OP_ACCESS_ID); |
a9a846fd | 555 | nullifying = true; |
8712836b DH |
556 | break; |
557 | case PGM_MONITOR: | |
383d0b05 | 558 | rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, |
a36c5393 | 559 | (u16 *)__LC_MON_CLASS_NR); |
383d0b05 | 560 | rc |= put_guest_lc(vcpu, pgm_info.mon_code, |
8712836b DH |
561 | (u64 *)__LC_MON_CODE); |
562 | break; | |
403c8648 | 563 | case PGM_VECTOR_PROCESSING: |
8712836b | 564 | case PGM_DATA: |
383d0b05 | 565 | rc = put_guest_lc(vcpu, pgm_info.data_exc_code, |
8712836b DH |
566 | (u32 *)__LC_DATA_EXC_CODE); |
567 | break; | |
568 | case PGM_PROTECTION: | |
383d0b05 | 569 | rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
8712836b | 570 | (u64 *)__LC_TRANS_EXC_CODE); |
383d0b05 | 571 | rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
8712836b DH |
572 | (u8 *)__LC_EXC_ACCESS_ID); |
573 | break; | |
a9a846fd TH |
574 | case PGM_STACK_FULL: |
575 | case PGM_STACK_EMPTY: | |
576 | case PGM_STACK_SPECIFICATION: | |
577 | case PGM_STACK_TYPE: | |
578 | case PGM_STACK_OPERATION: | |
579 | case PGM_TRACE_TABEL: | |
580 | case PGM_CRYPTO_OPERATION: | |
581 | nullifying = true; | |
582 | break; | |
8712836b DH |
583 | } |
584 | ||
383d0b05 JF |
585 | if (pgm_info.code & PGM_PER) { |
586 | rc |= put_guest_lc(vcpu, pgm_info.per_code, | |
8712836b | 587 | (u8 *) __LC_PER_CODE); |
383d0b05 | 588 | rc |= put_guest_lc(vcpu, pgm_info.per_atmid, |
8712836b | 589 | (u8 *)__LC_PER_ATMID); |
383d0b05 | 590 | rc |= put_guest_lc(vcpu, pgm_info.per_address, |
8712836b | 591 | (u64 *) __LC_PER_ADDRESS); |
383d0b05 | 592 | rc |= put_guest_lc(vcpu, pgm_info.per_access_id, |
8712836b DH |
593 | (u8 *) __LC_PER_ACCESS_ID); |
594 | } | |
595 | ||
a9a846fd TH |
596 | if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST) |
597 | kvm_s390_rewind_psw(vcpu, ilc); | |
598 | ||
8a2ef71b | 599 | rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC); |
2ba45968 DH |
600 | rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea, |
601 | (u64 *) __LC_LAST_BREAK); | |
383d0b05 | 602 | rc |= put_guest_lc(vcpu, pgm_info.code, |
8712836b DH |
603 | (u16 *)__LC_PGM_INT_CODE); |
604 | rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, | |
605 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
606 | rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, | |
607 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
99e20009 | 608 | return rc ? -EFAULT : 0; |
0fb97abe JF |
609 | } |
610 | ||
6d3da241 | 611 | static int __must_check __deliver_service(struct kvm_vcpu *vcpu) |
0fb97abe | 612 | { |
6d3da241 JF |
613 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
614 | struct kvm_s390_ext_info ext; | |
615 | int rc = 0; | |
616 | ||
617 | spin_lock(&fi->lock); | |
618 | if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) { | |
619 | spin_unlock(&fi->lock); | |
620 | return 0; | |
621 | } | |
622 | ext = fi->srv_signal; | |
623 | memset(&fi->srv_signal, 0, sizeof(ext)); | |
624 | clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
625 | spin_unlock(&fi->lock); | |
0fb97abe | 626 | |
3f24ba15 | 627 | VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x", |
6d3da241 | 628 | ext.ext_params); |
0fb97abe | 629 | vcpu->stat.deliver_service_signal++; |
6d3da241 JF |
630 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, |
631 | ext.ext_params, 0); | |
0fb97abe JF |
632 | |
633 | rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); | |
467fc298 | 634 | rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
0fb97abe JF |
635 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
636 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
637 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
638 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
6d3da241 | 639 | rc |= put_guest_lc(vcpu, ext.ext_params, |
0fb97abe | 640 | (u32 *)__LC_EXT_PARAMS); |
6d3da241 | 641 | |
99e20009 | 642 | return rc ? -EFAULT : 0; |
0fb97abe JF |
643 | } |
644 | ||
6d3da241 | 645 | static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu) |
0fb97abe | 646 | { |
6d3da241 JF |
647 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
648 | struct kvm_s390_interrupt_info *inti; | |
649 | int rc = 0; | |
0fb97abe | 650 | |
6d3da241 JF |
651 | spin_lock(&fi->lock); |
652 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT], | |
653 | struct kvm_s390_interrupt_info, | |
654 | list); | |
655 | if (inti) { | |
6d3da241 JF |
656 | list_del(&inti->list); |
657 | fi->counters[FIRQ_CNTR_PFAULT] -= 1; | |
658 | } | |
659 | if (list_empty(&fi->lists[FIRQ_LIST_PFAULT])) | |
660 | clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
661 | spin_unlock(&fi->lock); | |
8712836b | 662 | |
6d3da241 | 663 | if (inti) { |
3f24ba15 CB |
664 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
665 | KVM_S390_INT_PFAULT_DONE, 0, | |
666 | inti->ext.ext_params2); | |
667 | VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx", | |
668 | inti->ext.ext_params2); | |
669 | ||
6d3da241 JF |
670 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, |
671 | (u16 *)__LC_EXT_INT_CODE); | |
672 | rc |= put_guest_lc(vcpu, PFAULT_DONE, | |
673 | (u16 *)__LC_EXT_CPU_ADDR); | |
674 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
675 | &vcpu->arch.sie_block->gpsw, | |
676 | sizeof(psw_t)); | |
677 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
678 | &vcpu->arch.sie_block->gpsw, | |
679 | sizeof(psw_t)); | |
680 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
681 | (u64 *)__LC_EXT_PARAMS2); | |
682 | kfree(inti); | |
683 | } | |
99e20009 | 684 | return rc ? -EFAULT : 0; |
0fb97abe JF |
685 | } |
686 | ||
6d3da241 | 687 | static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu) |
0fb97abe | 688 | { |
6d3da241 JF |
689 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
690 | struct kvm_s390_interrupt_info *inti; | |
691 | int rc = 0; | |
0fb97abe | 692 | |
6d3da241 JF |
693 | spin_lock(&fi->lock); |
694 | inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO], | |
695 | struct kvm_s390_interrupt_info, | |
696 | list); | |
697 | if (inti) { | |
698 | VCPU_EVENT(vcpu, 4, | |
3f24ba15 | 699 | "deliver: virtio parm: 0x%x,parm64: 0x%llx", |
6d3da241 JF |
700 | inti->ext.ext_params, inti->ext.ext_params2); |
701 | vcpu->stat.deliver_virtio_interrupt++; | |
702 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
703 | inti->type, | |
704 | inti->ext.ext_params, | |
705 | inti->ext.ext_params2); | |
706 | list_del(&inti->list); | |
707 | fi->counters[FIRQ_CNTR_VIRTIO] -= 1; | |
708 | } | |
709 | if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO])) | |
710 | clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
711 | spin_unlock(&fi->lock); | |
0fb97abe | 712 | |
6d3da241 JF |
713 | if (inti) { |
714 | rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, | |
715 | (u16 *)__LC_EXT_INT_CODE); | |
716 | rc |= put_guest_lc(vcpu, VIRTIO_PARAM, | |
717 | (u16 *)__LC_EXT_CPU_ADDR); | |
718 | rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, | |
719 | &vcpu->arch.sie_block->gpsw, | |
720 | sizeof(psw_t)); | |
721 | rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, | |
722 | &vcpu->arch.sie_block->gpsw, | |
723 | sizeof(psw_t)); | |
724 | rc |= put_guest_lc(vcpu, inti->ext.ext_params, | |
725 | (u32 *)__LC_EXT_PARAMS); | |
726 | rc |= put_guest_lc(vcpu, inti->ext.ext_params2, | |
727 | (u64 *)__LC_EXT_PARAMS2); | |
728 | kfree(inti); | |
729 | } | |
99e20009 | 730 | return rc ? -EFAULT : 0; |
0fb97abe JF |
731 | } |
732 | ||
733 | static int __must_check __deliver_io(struct kvm_vcpu *vcpu, | |
6d3da241 | 734 | unsigned long irq_type) |
0fb97abe | 735 | { |
6d3da241 JF |
736 | struct list_head *isc_list; |
737 | struct kvm_s390_float_interrupt *fi; | |
738 | struct kvm_s390_interrupt_info *inti = NULL; | |
739 | int rc = 0; | |
0fb97abe | 740 | |
6d3da241 | 741 | fi = &vcpu->kvm->arch.float_int; |
8712836b | 742 | |
6d3da241 JF |
743 | spin_lock(&fi->lock); |
744 | isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0]; | |
745 | inti = list_first_entry_or_null(isc_list, | |
746 | struct kvm_s390_interrupt_info, | |
747 | list); | |
748 | if (inti) { | |
3f24ba15 | 749 | VCPU_EVENT(vcpu, 4, "deliver: I/O 0x%llx", inti->type); |
6d3da241 JF |
750 | vcpu->stat.deliver_io_int++; |
751 | trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, | |
752 | inti->type, | |
753 | ((__u32)inti->io.subchannel_id << 16) | | |
754 | inti->io.subchannel_nr, | |
755 | ((__u64)inti->io.io_int_parm << 32) | | |
756 | inti->io.io_int_word); | |
757 | list_del(&inti->list); | |
758 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
759 | } | |
760 | if (list_empty(isc_list)) | |
761 | clear_bit(irq_type, &fi->pending_irqs); | |
762 | spin_unlock(&fi->lock); | |
763 | ||
764 | if (inti) { | |
765 | rc = put_guest_lc(vcpu, inti->io.subchannel_id, | |
766 | (u16 *)__LC_SUBCHANNEL_ID); | |
767 | rc |= put_guest_lc(vcpu, inti->io.subchannel_nr, | |
768 | (u16 *)__LC_SUBCHANNEL_NR); | |
769 | rc |= put_guest_lc(vcpu, inti->io.io_int_parm, | |
770 | (u32 *)__LC_IO_INT_PARM); | |
771 | rc |= put_guest_lc(vcpu, inti->io.io_int_word, | |
772 | (u32 *)__LC_IO_INT_WORD); | |
773 | rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, | |
774 | &vcpu->arch.sie_block->gpsw, | |
775 | sizeof(psw_t)); | |
776 | rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, | |
777 | &vcpu->arch.sie_block->gpsw, | |
778 | sizeof(psw_t)); | |
779 | kfree(inti); | |
780 | } | |
383d0b05 | 781 | |
99e20009 | 782 | return rc ? -EFAULT : 0; |
383d0b05 JF |
783 | } |
784 | ||
785 | typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu); | |
786 | ||
787 | static const deliver_irq_t deliver_irq_funcs[] = { | |
788 | [IRQ_PEND_MCHK_EX] = __deliver_machine_check, | |
6d3da241 | 789 | [IRQ_PEND_MCHK_REP] = __deliver_machine_check, |
383d0b05 JF |
790 | [IRQ_PEND_PROG] = __deliver_prog, |
791 | [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal, | |
792 | [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call, | |
793 | [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc, | |
794 | [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer, | |
795 | [IRQ_PEND_RESTART] = __deliver_restart, | |
383d0b05 JF |
796 | [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix, |
797 | [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init, | |
6d3da241 JF |
798 | [IRQ_PEND_EXT_SERVICE] = __deliver_service, |
799 | [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done, | |
800 | [IRQ_PEND_VIRTIO] = __deliver_virtio, | |
383d0b05 JF |
801 | }; |
802 | ||
ea5f4969 DH |
803 | /* Check whether an external call is pending (deliverable or not) */ |
804 | int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) | |
4953919f | 805 | { |
ea5f4969 DH |
806 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
807 | uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
4953919f | 808 | |
37c5f6c8 | 809 | if (!sclp.has_sigpif) |
ea5f4969 | 810 | return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); |
4953919f | 811 | |
ea5f4969 DH |
812 | return (sigp_ctrl & SIGP_CTRL_C) && |
813 | (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND); | |
4953919f DH |
814 | } |
815 | ||
9a022067 | 816 | int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) |
ba5c1e9b | 817 | { |
383d0b05 | 818 | int rc; |
ba5c1e9b | 819 | |
6d3da241 | 820 | rc = !!deliverable_irqs(vcpu); |
ba5c1e9b | 821 | |
bb78c5ec DH |
822 | if (!rc && kvm_cpu_has_pending_timer(vcpu)) |
823 | rc = 1; | |
ba5c1e9b | 824 | |
ea5f4969 DH |
825 | /* external call pending and deliverable */ |
826 | if (!rc && kvm_s390_ext_call_pending(vcpu) && | |
827 | !psw_extint_disabled(vcpu) && | |
828 | (vcpu->arch.sie_block->gcr[0] & 0x2000ul)) | |
4953919f DH |
829 | rc = 1; |
830 | ||
9a022067 | 831 | if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) |
6cddd432 DH |
832 | rc = 1; |
833 | ||
ba5c1e9b CO |
834 | return rc; |
835 | } | |
836 | ||
3d80840d MT |
837 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
838 | { | |
b4aec925 | 839 | return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu); |
3d80840d MT |
840 | } |
841 | ||
ba5c1e9b CO |
842 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
843 | { | |
844 | u64 now, sltime; | |
ba5c1e9b CO |
845 | |
846 | vcpu->stat.exit_wait_state++; | |
ba5c1e9b | 847 | |
0759d068 DH |
848 | /* fast path */ |
849 | if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu)) | |
850 | return 0; | |
e52b2af5 | 851 | |
ba5c1e9b CO |
852 | if (psw_interrupts_disabled(vcpu)) { |
853 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
b8e660b8 | 854 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
855 | } |
856 | ||
bb78c5ec | 857 | if (!ckc_interrupts_enabled(vcpu)) { |
ba5c1e9b | 858 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
bda343ef | 859 | __set_cpu_idle(vcpu); |
ba5c1e9b CO |
860 | goto no_timer; |
861 | } | |
862 | ||
fdf03650 | 863 | preempt_disable(); |
8c071b0f | 864 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
fdf03650 | 865 | preempt_enable(); |
ed4f2094 | 866 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); |
bda343ef DH |
867 | |
868 | /* underflow */ | |
869 | if (vcpu->arch.sie_block->ckc < now) | |
870 | return 0; | |
871 | ||
872 | __set_cpu_idle(vcpu); | |
ca872302 | 873 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
3f24ba15 | 874 | VCPU_EVENT(vcpu, 4, "enabled wait via clock comparator: %llu ns", sltime); |
ba5c1e9b | 875 | no_timer: |
800c1065 | 876 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
0759d068 | 877 | kvm_vcpu_block(vcpu); |
ba5c1e9b | 878 | __unset_cpu_idle(vcpu); |
800c1065 TH |
879 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
880 | ||
2d00f759 | 881 | hrtimer_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
882 | return 0; |
883 | } | |
884 | ||
0e9c85a5 DH |
885 | void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
886 | { | |
887 | if (waitqueue_active(&vcpu->wq)) { | |
888 | /* | |
889 | * The vcpu gave up the cpu voluntarily, mark it as a good | |
890 | * yield-candidate. | |
891 | */ | |
892 | vcpu->preempted = true; | |
893 | wake_up_interruptible(&vcpu->wq); | |
ce2e4f0b | 894 | vcpu->stat.halt_wakeup++; |
0e9c85a5 DH |
895 | } |
896 | } | |
897 | ||
ca872302 CB |
898 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
899 | { | |
900 | struct kvm_vcpu *vcpu; | |
2d00f759 | 901 | u64 now, sltime; |
ca872302 CB |
902 | |
903 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
fdf03650 | 904 | preempt_disable(); |
2d00f759 | 905 | now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch; |
fdf03650 | 906 | preempt_enable(); |
2d00f759 | 907 | sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); |
ca872302 | 908 | |
2d00f759 DH |
909 | /* |
910 | * If the monotonic clock runs faster than the tod clock we might be | |
911 | * woken up too early and have to go back to sleep to avoid deadlocks. | |
912 | */ | |
913 | if (vcpu->arch.sie_block->ckc > now && | |
914 | hrtimer_forward_now(timer, ns_to_ktime(sltime))) | |
915 | return HRTIMER_RESTART; | |
916 | kvm_s390_vcpu_wakeup(vcpu); | |
ca872302 CB |
917 | return HRTIMER_NORESTART; |
918 | } | |
ba5c1e9b | 919 | |
2ed10cc1 JF |
920 | void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
921 | { | |
922 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2ed10cc1 | 923 | |
4ae3c081 | 924 | spin_lock(&li->lock); |
383d0b05 JF |
925 | li->pending_irqs = 0; |
926 | bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); | |
927 | memset(&li->irq, 0, sizeof(li->irq)); | |
4ae3c081 | 928 | spin_unlock(&li->lock); |
4953919f DH |
929 | |
930 | /* clear pending external calls set by sigp interpretation facility */ | |
805de8f4 | 931 | atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags); |
ea5f4969 | 932 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0; |
2ed10cc1 JF |
933 | } |
934 | ||
614aeab4 | 935 | int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
ba5c1e9b | 936 | { |
180c12fb | 937 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
383d0b05 | 938 | deliver_irq_t func; |
79395031 | 939 | int rc = 0; |
383d0b05 | 940 | unsigned long irq_type; |
6d3da241 | 941 | unsigned long irqs; |
ba5c1e9b CO |
942 | |
943 | __reset_intercept_indicators(vcpu); | |
ba5c1e9b | 944 | |
383d0b05 JF |
945 | /* pending ckc conditions might have been invalidated */ |
946 | clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
b4aec925 | 947 | if (ckc_irq_pending(vcpu)) |
383d0b05 JF |
948 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
949 | ||
b4aec925 DH |
950 | /* pending cpu timer conditions might have been invalidated */ |
951 | clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
952 | if (cpu_timer_irq_pending(vcpu)) | |
953 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
954 | ||
ffeca0ae | 955 | while ((irqs = deliverable_irqs(vcpu)) && !rc) { |
383d0b05 | 956 | /* bits are in the order of interrupt priority */ |
6d3da241 | 957 | irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT); |
6d3da241 JF |
958 | if (is_ioirq(irq_type)) { |
959 | rc = __deliver_io(vcpu, irq_type); | |
960 | } else { | |
961 | func = deliver_irq_funcs[irq_type]; | |
962 | if (!func) { | |
963 | WARN_ON_ONCE(func == NULL); | |
964 | clear_bit(irq_type, &li->pending_irqs); | |
965 | continue; | |
966 | } | |
967 | rc = func(vcpu); | |
383d0b05 | 968 | } |
ffeca0ae | 969 | } |
383d0b05 | 970 | |
6d3da241 | 971 | set_intercept_indicators(vcpu); |
79395031 JF |
972 | |
973 | return rc; | |
ba5c1e9b CO |
974 | } |
975 | ||
383d0b05 | 976 | static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
977 | { |
978 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
979 | ||
ed2afcfa DH |
980 | VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code); |
981 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, | |
982 | irq->u.pgm.code, 0); | |
983 | ||
383d0b05 | 984 | li->irq.pgm = irq->u.pgm; |
9185124e | 985 | set_bit(IRQ_PEND_PROG, &li->pending_irqs); |
0146a7b0 JF |
986 | return 0; |
987 | } | |
988 | ||
ba5c1e9b CO |
989 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) |
990 | { | |
180c12fb | 991 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
383d0b05 | 992 | struct kvm_s390_irq irq; |
ba5c1e9b | 993 | |
4ae3c081 | 994 | spin_lock(&li->lock); |
383d0b05 JF |
995 | irq.u.pgm.code = code; |
996 | __inject_prog(vcpu, &irq); | |
d0321a24 | 997 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 998 | spin_unlock(&li->lock); |
bcd84683 JF |
999 | return 0; |
1000 | } | |
1001 | ||
1002 | int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, | |
1003 | struct kvm_s390_pgm_info *pgm_info) | |
1004 | { | |
1005 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1006 | struct kvm_s390_irq irq; |
0146a7b0 | 1007 | int rc; |
bcd84683 | 1008 | |
4ae3c081 | 1009 | spin_lock(&li->lock); |
383d0b05 JF |
1010 | irq.u.pgm = *pgm_info; |
1011 | rc = __inject_prog(vcpu, &irq); | |
bcd84683 | 1012 | BUG_ON(waitqueue_active(li->wq)); |
4ae3c081 | 1013 | spin_unlock(&li->lock); |
0146a7b0 JF |
1014 | return rc; |
1015 | } | |
1016 | ||
383d0b05 | 1017 | static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1018 | { |
1019 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1020 | ||
3f24ba15 CB |
1021 | VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx", |
1022 | irq->u.ext.ext_params2); | |
383d0b05 JF |
1023 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, |
1024 | irq->u.ext.ext_params, | |
ed2afcfa | 1025 | irq->u.ext.ext_params2); |
383d0b05 JF |
1026 | |
1027 | li->irq.ext = irq->u.ext; | |
1028 | set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); | |
805de8f4 | 1029 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1030 | return 0; |
1031 | } | |
1032 | ||
ea5f4969 DH |
1033 | static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id) |
1034 | { | |
1035 | unsigned char new_val, old_val; | |
1036 | uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
1037 | ||
1038 | new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK); | |
1039 | old_val = *sigp_ctrl & ~SIGP_CTRL_C; | |
1040 | if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) { | |
1041 | /* another external call is pending */ | |
1042 | return -EBUSY; | |
1043 | } | |
805de8f4 | 1044 | atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags); |
ea5f4969 DH |
1045 | return 0; |
1046 | } | |
1047 | ||
0675d92d | 1048 | static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1049 | { |
1050 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1051 | struct kvm_s390_extcall_info *extcall = &li->irq.extcall; |
ea5f4969 | 1052 | uint16_t src_id = irq->u.extcall.code; |
0146a7b0 | 1053 | |
3f24ba15 | 1054 | VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u", |
ea5f4969 | 1055 | src_id); |
383d0b05 | 1056 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, |
ed2afcfa | 1057 | src_id, 0); |
ea5f4969 DH |
1058 | |
1059 | /* sending vcpu invalid */ | |
1060 | if (src_id >= KVM_MAX_VCPUS || | |
1061 | kvm_get_vcpu(vcpu->kvm, src_id) == NULL) | |
1062 | return -EINVAL; | |
1063 | ||
37c5f6c8 | 1064 | if (sclp.has_sigpif) |
ea5f4969 | 1065 | return __inject_extcall_sigpif(vcpu, src_id); |
383d0b05 | 1066 | |
b938eace | 1067 | if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) |
ea5f4969 | 1068 | return -EBUSY; |
383d0b05 | 1069 | *extcall = irq->u.extcall; |
805de8f4 | 1070 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1071 | return 0; |
1072 | } | |
1073 | ||
383d0b05 | 1074 | static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1075 | { |
1076 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1077 | struct kvm_s390_prefix_info *prefix = &li->irq.prefix; |
0146a7b0 | 1078 | |
ed2afcfa | 1079 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x", |
556cc0da | 1080 | irq->u.prefix.address); |
383d0b05 | 1081 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, |
ed2afcfa | 1082 | irq->u.prefix.address, 0); |
383d0b05 | 1083 | |
a3a9c59a DH |
1084 | if (!is_vcpu_stopped(vcpu)) |
1085 | return -EBUSY; | |
1086 | ||
383d0b05 JF |
1087 | *prefix = irq->u.prefix; |
1088 | set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); | |
0146a7b0 JF |
1089 | return 0; |
1090 | } | |
1091 | ||
6cddd432 | 1092 | #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) |
383d0b05 | 1093 | static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1094 | { |
1095 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2822545f | 1096 | struct kvm_s390_stop_info *stop = &li->irq.stop; |
6cddd432 | 1097 | int rc = 0; |
0146a7b0 | 1098 | |
ed2afcfa | 1099 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0); |
383d0b05 | 1100 | |
2822545f DH |
1101 | if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) |
1102 | return -EINVAL; | |
1103 | ||
6cddd432 DH |
1104 | if (is_vcpu_stopped(vcpu)) { |
1105 | if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) | |
1106 | rc = kvm_s390_store_status_unloaded(vcpu, | |
1107 | KVM_S390_STORE_STATUS_NOADDR); | |
1108 | return rc; | |
1109 | } | |
1110 | ||
1111 | if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) | |
1112 | return -EBUSY; | |
2822545f | 1113 | stop->flags = irq->u.stop.flags; |
6cddd432 | 1114 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); |
0146a7b0 JF |
1115 | return 0; |
1116 | } | |
1117 | ||
1118 | static int __inject_sigp_restart(struct kvm_vcpu *vcpu, | |
383d0b05 | 1119 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1120 | { |
1121 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1122 | ||
3f24ba15 | 1123 | VCPU_EVENT(vcpu, 3, "%s", "inject: restart int"); |
ed2afcfa | 1124 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); |
383d0b05 JF |
1125 | |
1126 | set_bit(IRQ_PEND_RESTART, &li->pending_irqs); | |
0146a7b0 JF |
1127 | return 0; |
1128 | } | |
1129 | ||
1130 | static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, | |
383d0b05 | 1131 | struct kvm_s390_irq *irq) |
0146a7b0 JF |
1132 | { |
1133 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1134 | ||
3f24ba15 | 1135 | VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u", |
383d0b05 JF |
1136 | irq->u.emerg.code); |
1137 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, | |
ed2afcfa | 1138 | irq->u.emerg.code, 0); |
383d0b05 | 1139 | |
49538d12 | 1140 | set_bit(irq->u.emerg.code, li->sigp_emerg_pending); |
383d0b05 | 1141 | set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
805de8f4 | 1142 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1143 | return 0; |
1144 | } | |
1145 | ||
383d0b05 | 1146 | static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
0146a7b0 JF |
1147 | { |
1148 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
383d0b05 | 1149 | struct kvm_s390_mchk_info *mchk = &li->irq.mchk; |
0146a7b0 | 1150 | |
3f24ba15 | 1151 | VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx", |
556cc0da | 1152 | irq->u.mchk.mcic); |
383d0b05 | 1153 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, |
ed2afcfa | 1154 | irq->u.mchk.mcic); |
383d0b05 JF |
1155 | |
1156 | /* | |
fc2020cf JF |
1157 | * Because repressible machine checks can be indicated along with |
1158 | * exigent machine checks (PoP, Chapter 11, Interruption action) | |
1159 | * we need to combine cr14, mcic and external damage code. | |
1160 | * Failing storage address and the logout area should not be or'ed | |
1161 | * together, we just indicate the last occurrence of the corresponding | |
1162 | * machine check | |
383d0b05 | 1163 | */ |
fc2020cf | 1164 | mchk->cr14 |= irq->u.mchk.cr14; |
383d0b05 | 1165 | mchk->mcic |= irq->u.mchk.mcic; |
fc2020cf JF |
1166 | mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; |
1167 | mchk->failing_storage_address = irq->u.mchk.failing_storage_address; | |
1168 | memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, | |
1169 | sizeof(mchk->fixed_logout)); | |
383d0b05 JF |
1170 | if (mchk->mcic & MCHK_EX_MASK) |
1171 | set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); | |
1172 | else if (mchk->mcic & MCHK_REP_MASK) | |
1173 | set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); | |
0146a7b0 JF |
1174 | return 0; |
1175 | } | |
1176 | ||
383d0b05 | 1177 | static int __inject_ckc(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1178 | { |
1179 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1180 | ||
3f24ba15 | 1181 | VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external"); |
383d0b05 | 1182 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, |
ed2afcfa | 1183 | 0, 0); |
383d0b05 JF |
1184 | |
1185 | set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); | |
805de8f4 | 1186 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
0146a7b0 JF |
1187 | return 0; |
1188 | } | |
1189 | ||
383d0b05 | 1190 | static int __inject_cpu_timer(struct kvm_vcpu *vcpu) |
0146a7b0 JF |
1191 | { |
1192 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1193 | ||
3f24ba15 | 1194 | VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external"); |
383d0b05 | 1195 | trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, |
ed2afcfa | 1196 | 0, 0); |
383d0b05 JF |
1197 | |
1198 | set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); | |
805de8f4 | 1199 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
ba5c1e9b CO |
1200 | return 0; |
1201 | } | |
1202 | ||
6d3da241 JF |
1203 | static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm, |
1204 | int isc, u32 schid) | |
1205 | { | |
1206 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1207 | struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1208 | struct kvm_s390_interrupt_info *iter; | |
1209 | u16 id = (schid & 0xffff0000U) >> 16; | |
1210 | u16 nr = schid & 0x0000ffffU; | |
1211 | ||
1212 | spin_lock(&fi->lock); | |
1213 | list_for_each_entry(iter, isc_list, list) { | |
1214 | if (schid && (id != iter->io.subchannel_id || | |
1215 | nr != iter->io.subchannel_nr)) | |
1216 | continue; | |
1217 | /* found an appropriate entry */ | |
1218 | list_del_init(&iter->list); | |
1219 | fi->counters[FIRQ_CNTR_IO] -= 1; | |
1220 | if (list_empty(isc_list)) | |
1221 | clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); | |
1222 | spin_unlock(&fi->lock); | |
1223 | return iter; | |
1224 | } | |
1225 | spin_unlock(&fi->lock); | |
1226 | return NULL; | |
1227 | } | |
383d0b05 | 1228 | |
6d3da241 JF |
1229 | /* |
1230 | * Dequeue and return an I/O interrupt matching any of the interruption | |
1231 | * subclasses as designated by the isc mask in cr6 and the schid (if != 0). | |
1232 | */ | |
fa6b7fe9 | 1233 | struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
6d3da241 JF |
1234 | u64 isc_mask, u32 schid) |
1235 | { | |
1236 | struct kvm_s390_interrupt_info *inti = NULL; | |
1237 | int isc; | |
1238 | ||
1239 | for (isc = 0; isc <= MAX_ISC && !inti; isc++) { | |
1240 | if (isc_mask & isc_to_isc_bits(isc)) | |
1241 | inti = get_io_int(kvm, isc, schid); | |
1242 | } | |
1243 | return inti; | |
1244 | } | |
1245 | ||
1246 | #define SCCB_MASK 0xFFFFFFF8 | |
1247 | #define SCCB_EVENT_PENDING 0x3 | |
1248 | ||
1249 | static int __inject_service(struct kvm *kvm, | |
1250 | struct kvm_s390_interrupt_info *inti) | |
1251 | { | |
1252 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1253 | ||
1254 | spin_lock(&fi->lock); | |
1255 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING; | |
1256 | /* | |
1257 | * Early versions of the QEMU s390 bios will inject several | |
1258 | * service interrupts after another without handling a | |
1259 | * condition code indicating busy. | |
1260 | * We will silently ignore those superfluous sccb values. | |
1261 | * A future version of QEMU will take care of serialization | |
1262 | * of servc requests | |
1263 | */ | |
1264 | if (fi->srv_signal.ext_params & SCCB_MASK) | |
1265 | goto out; | |
1266 | fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK; | |
1267 | set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); | |
1268 | out: | |
1269 | spin_unlock(&fi->lock); | |
1270 | kfree(inti); | |
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | static int __inject_virtio(struct kvm *kvm, | |
1275 | struct kvm_s390_interrupt_info *inti) | |
1276 | { | |
1277 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1278 | ||
1279 | spin_lock(&fi->lock); | |
1280 | if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) { | |
1281 | spin_unlock(&fi->lock); | |
1282 | return -EBUSY; | |
1283 | } | |
1284 | fi->counters[FIRQ_CNTR_VIRTIO] += 1; | |
1285 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]); | |
1286 | set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); | |
1287 | spin_unlock(&fi->lock); | |
1288 | return 0; | |
1289 | } | |
1290 | ||
1291 | static int __inject_pfault_done(struct kvm *kvm, | |
1292 | struct kvm_s390_interrupt_info *inti) | |
1293 | { | |
1294 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1295 | ||
1296 | spin_lock(&fi->lock); | |
1297 | if (fi->counters[FIRQ_CNTR_PFAULT] >= | |
1298 | (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) { | |
1299 | spin_unlock(&fi->lock); | |
1300 | return -EBUSY; | |
1301 | } | |
1302 | fi->counters[FIRQ_CNTR_PFAULT] += 1; | |
1303 | list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]); | |
1304 | set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); | |
1305 | spin_unlock(&fi->lock); | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | #define CR_PENDING_SUBCLASS 28 | |
1310 | static int __inject_float_mchk(struct kvm *kvm, | |
1311 | struct kvm_s390_interrupt_info *inti) | |
1312 | { | |
1313 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1314 | ||
1315 | spin_lock(&fi->lock); | |
1316 | fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS); | |
1317 | fi->mchk.mcic |= inti->mchk.mcic; | |
1318 | set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs); | |
1319 | spin_unlock(&fi->lock); | |
1320 | kfree(inti); | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
fa6b7fe9 CH |
1325 | { |
1326 | struct kvm_s390_float_interrupt *fi; | |
6d3da241 JF |
1327 | struct list_head *list; |
1328 | int isc; | |
fa6b7fe9 | 1329 | |
fa6b7fe9 CH |
1330 | fi = &kvm->arch.float_int; |
1331 | spin_lock(&fi->lock); | |
6d3da241 JF |
1332 | if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) { |
1333 | spin_unlock(&fi->lock); | |
1334 | return -EBUSY; | |
a91b8ebe | 1335 | } |
6d3da241 JF |
1336 | fi->counters[FIRQ_CNTR_IO] += 1; |
1337 | ||
1338 | isc = int_word_to_isc(inti->io.io_int_word); | |
1339 | list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; | |
1340 | list_add_tail(&inti->list, list); | |
1341 | set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); | |
fa6b7fe9 | 1342 | spin_unlock(&fi->lock); |
6d3da241 | 1343 | return 0; |
fa6b7fe9 | 1344 | } |
ba5c1e9b | 1345 | |
96e0ed23 DH |
1346 | /* |
1347 | * Find a destination VCPU for a floating irq and kick it. | |
1348 | */ | |
1349 | static void __floating_irq_kick(struct kvm *kvm, u64 type) | |
ba5c1e9b | 1350 | { |
96e0ed23 | 1351 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
180c12fb | 1352 | struct kvm_s390_local_interrupt *li; |
96e0ed23 DH |
1353 | struct kvm_vcpu *dst_vcpu; |
1354 | int sigcpu, online_vcpus, nr_tries = 0; | |
1355 | ||
1356 | online_vcpus = atomic_read(&kvm->online_vcpus); | |
1357 | if (!online_vcpus) | |
1358 | return; | |
1359 | ||
1360 | /* find idle VCPUs first, then round robin */ | |
1361 | sigcpu = find_first_bit(fi->idle_mask, online_vcpus); | |
1362 | if (sigcpu == online_vcpus) { | |
1363 | do { | |
1364 | sigcpu = fi->next_rr_cpu; | |
1365 | fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus; | |
1366 | /* avoid endless loops if all vcpus are stopped */ | |
1367 | if (nr_tries++ >= online_vcpus) | |
1368 | return; | |
1369 | } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu))); | |
1370 | } | |
1371 | dst_vcpu = kvm_get_vcpu(kvm, sigcpu); | |
1372 | ||
1373 | /* make the VCPU drop out of the SIE, or wake it up if sleeping */ | |
1374 | li = &dst_vcpu->arch.local_int; | |
1375 | spin_lock(&li->lock); | |
1376 | switch (type) { | |
1377 | case KVM_S390_MCHK: | |
805de8f4 | 1378 | atomic_or(CPUSTAT_STOP_INT, li->cpuflags); |
96e0ed23 DH |
1379 | break; |
1380 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
805de8f4 | 1381 | atomic_or(CPUSTAT_IO_INT, li->cpuflags); |
96e0ed23 DH |
1382 | break; |
1383 | default: | |
805de8f4 | 1384 | atomic_or(CPUSTAT_EXT_INT, li->cpuflags); |
96e0ed23 DH |
1385 | break; |
1386 | } | |
1387 | spin_unlock(&li->lock); | |
1388 | kvm_s390_vcpu_wakeup(dst_vcpu); | |
1389 | } | |
1390 | ||
1391 | static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) | |
1392 | { | |
6d3da241 JF |
1393 | u64 type = READ_ONCE(inti->type); |
1394 | int rc; | |
ba5c1e9b | 1395 | |
6d3da241 JF |
1396 | switch (type) { |
1397 | case KVM_S390_MCHK: | |
1398 | rc = __inject_float_mchk(kvm, inti); | |
1399 | break; | |
1400 | case KVM_S390_INT_VIRTIO: | |
1401 | rc = __inject_virtio(kvm, inti); | |
1402 | break; | |
1403 | case KVM_S390_INT_SERVICE: | |
1404 | rc = __inject_service(kvm, inti); | |
1405 | break; | |
1406 | case KVM_S390_INT_PFAULT_DONE: | |
1407 | rc = __inject_pfault_done(kvm, inti); | |
1408 | break; | |
1409 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1410 | rc = __inject_io(kvm, inti); | |
1411 | break; | |
1412 | default: | |
a91b8ebe | 1413 | rc = -EINVAL; |
c05c4186 | 1414 | } |
6d3da241 JF |
1415 | if (rc) |
1416 | return rc; | |
1417 | ||
96e0ed23 | 1418 | __floating_irq_kick(kvm, type); |
6d3da241 | 1419 | return 0; |
c05c4186 JF |
1420 | } |
1421 | ||
1422 | int kvm_s390_inject_vm(struct kvm *kvm, | |
1423 | struct kvm_s390_interrupt *s390int) | |
1424 | { | |
1425 | struct kvm_s390_interrupt_info *inti; | |
428d53be | 1426 | int rc; |
c05c4186 | 1427 | |
ba5c1e9b CO |
1428 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); |
1429 | if (!inti) | |
1430 | return -ENOMEM; | |
1431 | ||
c05c4186 JF |
1432 | inti->type = s390int->type; |
1433 | switch (inti->type) { | |
ba5c1e9b | 1434 | case KVM_S390_INT_VIRTIO: |
33e19115 | 1435 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b | 1436 | s390int->parm, s390int->parm64); |
ba5c1e9b CO |
1437 | inti->ext.ext_params = s390int->parm; |
1438 | inti->ext.ext_params2 = s390int->parm64; | |
1439 | break; | |
1440 | case KVM_S390_INT_SERVICE: | |
3f24ba15 | 1441 | VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm); |
ba5c1e9b CO |
1442 | inti->ext.ext_params = s390int->parm; |
1443 | break; | |
3c038e6b | 1444 | case KVM_S390_INT_PFAULT_DONE: |
3c038e6b DD |
1445 | inti->ext.ext_params2 = s390int->parm64; |
1446 | break; | |
48a3e950 | 1447 | case KVM_S390_MCHK: |
3f24ba15 | 1448 | VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx", |
48a3e950 | 1449 | s390int->parm64); |
48a3e950 CH |
1450 | inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
1451 | inti->mchk.mcic = s390int->parm64; | |
1452 | break; | |
d8346b7d | 1453 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
a37281b6 | 1454 | if (inti->type & KVM_S390_INT_IO_AI_MASK) |
d8346b7d CH |
1455 | VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)"); |
1456 | else | |
1457 | VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x", | |
1458 | s390int->type & IOINT_CSSID_MASK, | |
1459 | s390int->type & IOINT_SSID_MASK, | |
1460 | s390int->type & IOINT_SCHID_MASK); | |
d8346b7d CH |
1461 | inti->io.subchannel_id = s390int->parm >> 16; |
1462 | inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; | |
1463 | inti->io.io_int_parm = s390int->parm64 >> 32; | |
1464 | inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; | |
1465 | break; | |
ba5c1e9b CO |
1466 | default: |
1467 | kfree(inti); | |
1468 | return -EINVAL; | |
1469 | } | |
ade38c31 CH |
1470 | trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
1471 | 2); | |
ba5c1e9b | 1472 | |
428d53be DH |
1473 | rc = __inject_vm(kvm, inti); |
1474 | if (rc) | |
1475 | kfree(inti); | |
1476 | return rc; | |
ba5c1e9b CO |
1477 | } |
1478 | ||
15462e37 | 1479 | int kvm_s390_reinject_io_int(struct kvm *kvm, |
2f32d4ea CH |
1480 | struct kvm_s390_interrupt_info *inti) |
1481 | { | |
15462e37 | 1482 | return __inject_vm(kvm, inti); |
2f32d4ea CH |
1483 | } |
1484 | ||
383d0b05 JF |
1485 | int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
1486 | struct kvm_s390_irq *irq) | |
1487 | { | |
1488 | irq->type = s390int->type; | |
1489 | switch (irq->type) { | |
1490 | case KVM_S390_PROGRAM_INT: | |
1491 | if (s390int->parm & 0xffff0000) | |
1492 | return -EINVAL; | |
1493 | irq->u.pgm.code = s390int->parm; | |
1494 | break; | |
1495 | case KVM_S390_SIGP_SET_PREFIX: | |
1496 | irq->u.prefix.address = s390int->parm; | |
1497 | break; | |
2822545f DH |
1498 | case KVM_S390_SIGP_STOP: |
1499 | irq->u.stop.flags = s390int->parm; | |
1500 | break; | |
383d0b05 | 1501 | case KVM_S390_INT_EXTERNAL_CALL: |
94d1f564 | 1502 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1503 | return -EINVAL; |
1504 | irq->u.extcall.code = s390int->parm; | |
1505 | break; | |
1506 | case KVM_S390_INT_EMERGENCY: | |
94d1f564 | 1507 | if (s390int->parm & 0xffff0000) |
383d0b05 JF |
1508 | return -EINVAL; |
1509 | irq->u.emerg.code = s390int->parm; | |
1510 | break; | |
1511 | case KVM_S390_MCHK: | |
1512 | irq->u.mchk.mcic = s390int->parm64; | |
1513 | break; | |
1514 | } | |
1515 | return 0; | |
1516 | } | |
1517 | ||
6cddd432 DH |
1518 | int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) |
1519 | { | |
1520 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1521 | ||
1522 | return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1523 | } | |
1524 | ||
1525 | void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) | |
1526 | { | |
1527 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1528 | ||
1529 | spin_lock(&li->lock); | |
1530 | li->irq.stop.flags = 0; | |
1531 | clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); | |
1532 | spin_unlock(&li->lock); | |
1533 | } | |
1534 | ||
79e87a10 | 1535 | static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
ba5c1e9b | 1536 | { |
0146a7b0 | 1537 | int rc; |
ba5c1e9b | 1538 | |
383d0b05 | 1539 | switch (irq->type) { |
ba5c1e9b | 1540 | case KVM_S390_PROGRAM_INT: |
383d0b05 | 1541 | rc = __inject_prog(vcpu, irq); |
ba5c1e9b | 1542 | break; |
b7e6e4d3 | 1543 | case KVM_S390_SIGP_SET_PREFIX: |
383d0b05 | 1544 | rc = __inject_set_prefix(vcpu, irq); |
b7e6e4d3 | 1545 | break; |
ba5c1e9b | 1546 | case KVM_S390_SIGP_STOP: |
383d0b05 | 1547 | rc = __inject_sigp_stop(vcpu, irq); |
0146a7b0 | 1548 | break; |
ba5c1e9b | 1549 | case KVM_S390_RESTART: |
383d0b05 | 1550 | rc = __inject_sigp_restart(vcpu, irq); |
0146a7b0 | 1551 | break; |
e029ae5b | 1552 | case KVM_S390_INT_CLOCK_COMP: |
383d0b05 | 1553 | rc = __inject_ckc(vcpu); |
0146a7b0 | 1554 | break; |
e029ae5b | 1555 | case KVM_S390_INT_CPU_TIMER: |
383d0b05 | 1556 | rc = __inject_cpu_timer(vcpu); |
82a12737 | 1557 | break; |
7697e71f | 1558 | case KVM_S390_INT_EXTERNAL_CALL: |
383d0b05 | 1559 | rc = __inject_extcall(vcpu, irq); |
82a12737 | 1560 | break; |
ba5c1e9b | 1561 | case KVM_S390_INT_EMERGENCY: |
383d0b05 | 1562 | rc = __inject_sigp_emergency(vcpu, irq); |
ba5c1e9b | 1563 | break; |
48a3e950 | 1564 | case KVM_S390_MCHK: |
383d0b05 | 1565 | rc = __inject_mchk(vcpu, irq); |
48a3e950 | 1566 | break; |
3c038e6b | 1567 | case KVM_S390_INT_PFAULT_INIT: |
383d0b05 | 1568 | rc = __inject_pfault_init(vcpu, irq); |
3c038e6b | 1569 | break; |
ba5c1e9b CO |
1570 | case KVM_S390_INT_VIRTIO: |
1571 | case KVM_S390_INT_SERVICE: | |
d8346b7d | 1572 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
ba5c1e9b | 1573 | default: |
0146a7b0 | 1574 | rc = -EINVAL; |
ba5c1e9b | 1575 | } |
79e87a10 JF |
1576 | |
1577 | return rc; | |
1578 | } | |
1579 | ||
1580 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) | |
1581 | { | |
1582 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
1583 | int rc; | |
1584 | ||
1585 | spin_lock(&li->lock); | |
1586 | rc = do_inject_vcpu(vcpu, irq); | |
4ae3c081 | 1587 | spin_unlock(&li->lock); |
0146a7b0 JF |
1588 | if (!rc) |
1589 | kvm_s390_vcpu_wakeup(vcpu); | |
0146a7b0 | 1590 | return rc; |
ba5c1e9b | 1591 | } |
c05c4186 | 1592 | |
6d3da241 | 1593 | static inline void clear_irq_list(struct list_head *_list) |
c05c4186 | 1594 | { |
6d3da241 | 1595 | struct kvm_s390_interrupt_info *inti, *n; |
c05c4186 | 1596 | |
6d3da241 | 1597 | list_for_each_entry_safe(inti, n, _list, list) { |
c05c4186 JF |
1598 | list_del(&inti->list); |
1599 | kfree(inti); | |
1600 | } | |
c05c4186 JF |
1601 | } |
1602 | ||
94aa033e JF |
1603 | static void inti_to_irq(struct kvm_s390_interrupt_info *inti, |
1604 | struct kvm_s390_irq *irq) | |
c05c4186 | 1605 | { |
94aa033e | 1606 | irq->type = inti->type; |
c05c4186 | 1607 | switch (inti->type) { |
3c038e6b DD |
1608 | case KVM_S390_INT_PFAULT_INIT: |
1609 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 | 1610 | case KVM_S390_INT_VIRTIO: |
94aa033e | 1611 | irq->u.ext = inti->ext; |
c05c4186 JF |
1612 | break; |
1613 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
94aa033e | 1614 | irq->u.io = inti->io; |
c05c4186 | 1615 | break; |
c05c4186 | 1616 | } |
c05c4186 JF |
1617 | } |
1618 | ||
6d3da241 JF |
1619 | void kvm_s390_clear_float_irqs(struct kvm *kvm) |
1620 | { | |
1621 | struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; | |
1622 | int i; | |
1623 | ||
1624 | spin_lock(&fi->lock); | |
f2ae45ed JF |
1625 | fi->pending_irqs = 0; |
1626 | memset(&fi->srv_signal, 0, sizeof(fi->srv_signal)); | |
1627 | memset(&fi->mchk, 0, sizeof(fi->mchk)); | |
6d3da241 JF |
1628 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1629 | clear_irq_list(&fi->lists[i]); | |
1630 | for (i = 0; i < FIRQ_MAX_COUNT; i++) | |
1631 | fi->counters[i] = 0; | |
1632 | spin_unlock(&fi->lock); | |
1633 | }; | |
1634 | ||
94aa033e | 1635 | static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len) |
c05c4186 JF |
1636 | { |
1637 | struct kvm_s390_interrupt_info *inti; | |
1638 | struct kvm_s390_float_interrupt *fi; | |
94aa033e | 1639 | struct kvm_s390_irq *buf; |
6d3da241 | 1640 | struct kvm_s390_irq *irq; |
94aa033e | 1641 | int max_irqs; |
c05c4186 JF |
1642 | int ret = 0; |
1643 | int n = 0; | |
6d3da241 | 1644 | int i; |
c05c4186 | 1645 | |
94aa033e JF |
1646 | if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0) |
1647 | return -EINVAL; | |
1648 | ||
1649 | /* | |
1650 | * We are already using -ENOMEM to signal | |
1651 | * userspace it may retry with a bigger buffer, | |
1652 | * so we need to use something else for this case | |
1653 | */ | |
1654 | buf = vzalloc(len); | |
1655 | if (!buf) | |
1656 | return -ENOBUFS; | |
1657 | ||
1658 | max_irqs = len / sizeof(struct kvm_s390_irq); | |
1659 | ||
c05c4186 JF |
1660 | fi = &kvm->arch.float_int; |
1661 | spin_lock(&fi->lock); | |
6d3da241 JF |
1662 | for (i = 0; i < FIRQ_LIST_COUNT; i++) { |
1663 | list_for_each_entry(inti, &fi->lists[i], list) { | |
1664 | if (n == max_irqs) { | |
1665 | /* signal userspace to try again */ | |
1666 | ret = -ENOMEM; | |
1667 | goto out; | |
1668 | } | |
1669 | inti_to_irq(inti, &buf[n]); | |
1670 | n++; | |
1671 | } | |
1672 | } | |
1673 | if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) { | |
94aa033e | 1674 | if (n == max_irqs) { |
c05c4186 JF |
1675 | /* signal userspace to try again */ |
1676 | ret = -ENOMEM; | |
6d3da241 | 1677 | goto out; |
c05c4186 | 1678 | } |
6d3da241 JF |
1679 | irq = (struct kvm_s390_irq *) &buf[n]; |
1680 | irq->type = KVM_S390_INT_SERVICE; | |
1681 | irq->u.ext = fi->srv_signal; | |
c05c4186 JF |
1682 | n++; |
1683 | } | |
6d3da241 JF |
1684 | if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
1685 | if (n == max_irqs) { | |
1686 | /* signal userspace to try again */ | |
1687 | ret = -ENOMEM; | |
1688 | goto out; | |
1689 | } | |
1690 | irq = (struct kvm_s390_irq *) &buf[n]; | |
1691 | irq->type = KVM_S390_MCHK; | |
1692 | irq->u.mchk = fi->mchk; | |
1693 | n++; | |
1694 | } | |
1695 | ||
1696 | out: | |
c05c4186 | 1697 | spin_unlock(&fi->lock); |
94aa033e JF |
1698 | if (!ret && n > 0) { |
1699 | if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n)) | |
1700 | ret = -EFAULT; | |
1701 | } | |
1702 | vfree(buf); | |
c05c4186 JF |
1703 | |
1704 | return ret < 0 ? ret : n; | |
1705 | } | |
1706 | ||
1707 | static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) | |
1708 | { | |
1709 | int r; | |
1710 | ||
1711 | switch (attr->group) { | |
1712 | case KVM_DEV_FLIC_GET_ALL_IRQS: | |
94aa033e | 1713 | r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr, |
c05c4186 JF |
1714 | attr->attr); |
1715 | break; | |
1716 | default: | |
1717 | r = -EINVAL; | |
1718 | } | |
1719 | ||
1720 | return r; | |
1721 | } | |
1722 | ||
1723 | static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, | |
1724 | u64 addr) | |
1725 | { | |
1726 | struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; | |
1727 | void *target = NULL; | |
1728 | void __user *source; | |
1729 | u64 size; | |
1730 | ||
1731 | if (get_user(inti->type, (u64 __user *)addr)) | |
1732 | return -EFAULT; | |
1733 | ||
1734 | switch (inti->type) { | |
3c038e6b DD |
1735 | case KVM_S390_INT_PFAULT_INIT: |
1736 | case KVM_S390_INT_PFAULT_DONE: | |
c05c4186 JF |
1737 | case KVM_S390_INT_VIRTIO: |
1738 | case KVM_S390_INT_SERVICE: | |
1739 | target = (void *) &inti->ext; | |
1740 | source = &uptr->u.ext; | |
1741 | size = sizeof(inti->ext); | |
1742 | break; | |
1743 | case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: | |
1744 | target = (void *) &inti->io; | |
1745 | source = &uptr->u.io; | |
1746 | size = sizeof(inti->io); | |
1747 | break; | |
1748 | case KVM_S390_MCHK: | |
1749 | target = (void *) &inti->mchk; | |
1750 | source = &uptr->u.mchk; | |
1751 | size = sizeof(inti->mchk); | |
1752 | break; | |
1753 | default: | |
1754 | return -EINVAL; | |
1755 | } | |
1756 | ||
1757 | if (copy_from_user(target, source, size)) | |
1758 | return -EFAULT; | |
1759 | ||
1760 | return 0; | |
1761 | } | |
1762 | ||
1763 | static int enqueue_floating_irq(struct kvm_device *dev, | |
1764 | struct kvm_device_attr *attr) | |
1765 | { | |
1766 | struct kvm_s390_interrupt_info *inti = NULL; | |
1767 | int r = 0; | |
1768 | int len = attr->attr; | |
1769 | ||
1770 | if (len % sizeof(struct kvm_s390_irq) != 0) | |
1771 | return -EINVAL; | |
1772 | else if (len > KVM_S390_FLIC_MAX_BUFFER) | |
1773 | return -EINVAL; | |
1774 | ||
1775 | while (len >= sizeof(struct kvm_s390_irq)) { | |
1776 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
1777 | if (!inti) | |
1778 | return -ENOMEM; | |
1779 | ||
1780 | r = copy_irq_from_user(inti, attr->addr); | |
1781 | if (r) { | |
1782 | kfree(inti); | |
1783 | return r; | |
1784 | } | |
a91b8ebe JF |
1785 | r = __inject_vm(dev->kvm, inti); |
1786 | if (r) { | |
1787 | kfree(inti); | |
1788 | return r; | |
1789 | } | |
c05c4186 JF |
1790 | len -= sizeof(struct kvm_s390_irq); |
1791 | attr->addr += sizeof(struct kvm_s390_irq); | |
1792 | } | |
1793 | ||
1794 | return r; | |
1795 | } | |
1796 | ||
841b91c5 CH |
1797 | static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
1798 | { | |
1799 | if (id >= MAX_S390_IO_ADAPTERS) | |
1800 | return NULL; | |
1801 | return kvm->arch.adapters[id]; | |
1802 | } | |
1803 | ||
1804 | static int register_io_adapter(struct kvm_device *dev, | |
1805 | struct kvm_device_attr *attr) | |
1806 | { | |
1807 | struct s390_io_adapter *adapter; | |
1808 | struct kvm_s390_io_adapter adapter_info; | |
1809 | ||
1810 | if (copy_from_user(&adapter_info, | |
1811 | (void __user *)attr->addr, sizeof(adapter_info))) | |
1812 | return -EFAULT; | |
1813 | ||
1814 | if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) || | |
1815 | (dev->kvm->arch.adapters[adapter_info.id] != NULL)) | |
1816 | return -EINVAL; | |
1817 | ||
1818 | adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); | |
1819 | if (!adapter) | |
1820 | return -ENOMEM; | |
1821 | ||
1822 | INIT_LIST_HEAD(&adapter->maps); | |
1823 | init_rwsem(&adapter->maps_lock); | |
1824 | atomic_set(&adapter->nr_maps, 0); | |
1825 | adapter->id = adapter_info.id; | |
1826 | adapter->isc = adapter_info.isc; | |
1827 | adapter->maskable = adapter_info.maskable; | |
1828 | adapter->masked = false; | |
1829 | adapter->swap = adapter_info.swap; | |
1830 | dev->kvm->arch.adapters[adapter->id] = adapter; | |
1831 | ||
1832 | return 0; | |
1833 | } | |
1834 | ||
1835 | int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) | |
1836 | { | |
1837 | int ret; | |
1838 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1839 | ||
1840 | if (!adapter || !adapter->maskable) | |
1841 | return -EINVAL; | |
1842 | ret = adapter->masked; | |
1843 | adapter->masked = masked; | |
1844 | return ret; | |
1845 | } | |
1846 | ||
1847 | static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr) | |
1848 | { | |
1849 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1850 | struct s390_map_info *map; | |
1851 | int ret; | |
1852 | ||
1853 | if (!adapter || !addr) | |
1854 | return -EINVAL; | |
1855 | ||
1856 | map = kzalloc(sizeof(*map), GFP_KERNEL); | |
1857 | if (!map) { | |
1858 | ret = -ENOMEM; | |
1859 | goto out; | |
1860 | } | |
1861 | INIT_LIST_HEAD(&map->list); | |
1862 | map->guest_addr = addr; | |
6e0a0431 | 1863 | map->addr = gmap_translate(kvm->arch.gmap, addr); |
841b91c5 CH |
1864 | if (map->addr == -EFAULT) { |
1865 | ret = -EFAULT; | |
1866 | goto out; | |
1867 | } | |
1868 | ret = get_user_pages_fast(map->addr, 1, 1, &map->page); | |
1869 | if (ret < 0) | |
1870 | goto out; | |
1871 | BUG_ON(ret != 1); | |
1872 | down_write(&adapter->maps_lock); | |
1873 | if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) { | |
1874 | list_add_tail(&map->list, &adapter->maps); | |
1875 | ret = 0; | |
1876 | } else { | |
1877 | put_page(map->page); | |
1878 | ret = -EINVAL; | |
1879 | } | |
1880 | up_write(&adapter->maps_lock); | |
1881 | out: | |
1882 | if (ret) | |
1883 | kfree(map); | |
1884 | return ret; | |
1885 | } | |
1886 | ||
1887 | static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr) | |
1888 | { | |
1889 | struct s390_io_adapter *adapter = get_io_adapter(kvm, id); | |
1890 | struct s390_map_info *map, *tmp; | |
1891 | int found = 0; | |
1892 | ||
1893 | if (!adapter || !addr) | |
1894 | return -EINVAL; | |
1895 | ||
1896 | down_write(&adapter->maps_lock); | |
1897 | list_for_each_entry_safe(map, tmp, &adapter->maps, list) { | |
1898 | if (map->guest_addr == addr) { | |
1899 | found = 1; | |
1900 | atomic_dec(&adapter->nr_maps); | |
1901 | list_del(&map->list); | |
1902 | put_page(map->page); | |
1903 | kfree(map); | |
1904 | break; | |
1905 | } | |
1906 | } | |
1907 | up_write(&adapter->maps_lock); | |
1908 | ||
1909 | return found ? 0 : -EINVAL; | |
1910 | } | |
1911 | ||
1912 | void kvm_s390_destroy_adapters(struct kvm *kvm) | |
1913 | { | |
1914 | int i; | |
1915 | struct s390_map_info *map, *tmp; | |
1916 | ||
1917 | for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) { | |
1918 | if (!kvm->arch.adapters[i]) | |
1919 | continue; | |
1920 | list_for_each_entry_safe(map, tmp, | |
1921 | &kvm->arch.adapters[i]->maps, list) { | |
1922 | list_del(&map->list); | |
1923 | put_page(map->page); | |
1924 | kfree(map); | |
1925 | } | |
1926 | kfree(kvm->arch.adapters[i]); | |
1927 | } | |
1928 | } | |
1929 | ||
1930 | static int modify_io_adapter(struct kvm_device *dev, | |
1931 | struct kvm_device_attr *attr) | |
1932 | { | |
1933 | struct kvm_s390_io_adapter_req req; | |
1934 | struct s390_io_adapter *adapter; | |
1935 | int ret; | |
1936 | ||
1937 | if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) | |
1938 | return -EFAULT; | |
1939 | ||
1940 | adapter = get_io_adapter(dev->kvm, req.id); | |
1941 | if (!adapter) | |
1942 | return -EINVAL; | |
1943 | switch (req.type) { | |
1944 | case KVM_S390_IO_ADAPTER_MASK: | |
1945 | ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); | |
1946 | if (ret > 0) | |
1947 | ret = 0; | |
1948 | break; | |
1949 | case KVM_S390_IO_ADAPTER_MAP: | |
1950 | ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr); | |
1951 | break; | |
1952 | case KVM_S390_IO_ADAPTER_UNMAP: | |
1953 | ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr); | |
1954 | break; | |
1955 | default: | |
1956 | ret = -EINVAL; | |
1957 | } | |
1958 | ||
1959 | return ret; | |
1960 | } | |
1961 | ||
c05c4186 JF |
1962 | static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
1963 | { | |
1964 | int r = 0; | |
3c038e6b DD |
1965 | unsigned int i; |
1966 | struct kvm_vcpu *vcpu; | |
c05c4186 JF |
1967 | |
1968 | switch (attr->group) { | |
1969 | case KVM_DEV_FLIC_ENQUEUE: | |
1970 | r = enqueue_floating_irq(dev, attr); | |
1971 | break; | |
1972 | case KVM_DEV_FLIC_CLEAR_IRQS: | |
67335e63 | 1973 | kvm_s390_clear_float_irqs(dev->kvm); |
c05c4186 | 1974 | break; |
3c038e6b DD |
1975 | case KVM_DEV_FLIC_APF_ENABLE: |
1976 | dev->kvm->arch.gmap->pfault_enabled = 1; | |
1977 | break; | |
1978 | case KVM_DEV_FLIC_APF_DISABLE_WAIT: | |
1979 | dev->kvm->arch.gmap->pfault_enabled = 0; | |
1980 | /* | |
1981 | * Make sure no async faults are in transition when | |
1982 | * clearing the queues. So we don't need to worry | |
1983 | * about late coming workers. | |
1984 | */ | |
1985 | synchronize_srcu(&dev->kvm->srcu); | |
1986 | kvm_for_each_vcpu(i, vcpu, dev->kvm) | |
1987 | kvm_clear_async_pf_completion_queue(vcpu); | |
1988 | break; | |
841b91c5 CH |
1989 | case KVM_DEV_FLIC_ADAPTER_REGISTER: |
1990 | r = register_io_adapter(dev, attr); | |
1991 | break; | |
1992 | case KVM_DEV_FLIC_ADAPTER_MODIFY: | |
1993 | r = modify_io_adapter(dev, attr); | |
1994 | break; | |
c05c4186 JF |
1995 | default: |
1996 | r = -EINVAL; | |
1997 | } | |
1998 | ||
1999 | return r; | |
2000 | } | |
2001 | ||
2002 | static int flic_create(struct kvm_device *dev, u32 type) | |
2003 | { | |
2004 | if (!dev) | |
2005 | return -EINVAL; | |
2006 | if (dev->kvm->arch.flic) | |
2007 | return -EINVAL; | |
2008 | dev->kvm->arch.flic = dev; | |
2009 | return 0; | |
2010 | } | |
2011 | ||
2012 | static void flic_destroy(struct kvm_device *dev) | |
2013 | { | |
2014 | dev->kvm->arch.flic = NULL; | |
2015 | kfree(dev); | |
2016 | } | |
2017 | ||
2018 | /* s390 floating irq controller (flic) */ | |
2019 | struct kvm_device_ops kvm_flic_ops = { | |
2020 | .name = "kvm-flic", | |
2021 | .get_attr = flic_get_attr, | |
2022 | .set_attr = flic_set_attr, | |
2023 | .create = flic_create, | |
2024 | .destroy = flic_destroy, | |
2025 | }; | |
84223598 CH |
2026 | |
2027 | static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) | |
2028 | { | |
2029 | unsigned long bit; | |
2030 | ||
2031 | bit = bit_nr + (addr % PAGE_SIZE) * 8; | |
2032 | ||
2033 | return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; | |
2034 | } | |
2035 | ||
2036 | static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter, | |
2037 | u64 addr) | |
2038 | { | |
2039 | struct s390_map_info *map; | |
2040 | ||
2041 | if (!adapter) | |
2042 | return NULL; | |
2043 | ||
2044 | list_for_each_entry(map, &adapter->maps, list) { | |
2045 | if (map->guest_addr == addr) | |
2046 | return map; | |
2047 | } | |
2048 | return NULL; | |
2049 | } | |
2050 | ||
2051 | static int adapter_indicators_set(struct kvm *kvm, | |
2052 | struct s390_io_adapter *adapter, | |
2053 | struct kvm_s390_adapter_int *adapter_int) | |
2054 | { | |
2055 | unsigned long bit; | |
2056 | int summary_set, idx; | |
2057 | struct s390_map_info *info; | |
2058 | void *map; | |
2059 | ||
2060 | info = get_map_info(adapter, adapter_int->ind_addr); | |
2061 | if (!info) | |
2062 | return -1; | |
2063 | map = page_address(info->page); | |
2064 | bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap); | |
2065 | set_bit(bit, map); | |
2066 | idx = srcu_read_lock(&kvm->srcu); | |
2067 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2068 | set_page_dirty_lock(info->page); | |
2069 | info = get_map_info(adapter, adapter_int->summary_addr); | |
2070 | if (!info) { | |
2071 | srcu_read_unlock(&kvm->srcu, idx); | |
2072 | return -1; | |
2073 | } | |
2074 | map = page_address(info->page); | |
2075 | bit = get_ind_bit(info->addr, adapter_int->summary_offset, | |
2076 | adapter->swap); | |
2077 | summary_set = test_and_set_bit(bit, map); | |
2078 | mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT); | |
2079 | set_page_dirty_lock(info->page); | |
2080 | srcu_read_unlock(&kvm->srcu, idx); | |
2081 | return summary_set ? 0 : 1; | |
2082 | } | |
2083 | ||
2084 | /* | |
2085 | * < 0 - not injected due to error | |
2086 | * = 0 - coalesced, summary indicator already active | |
2087 | * > 0 - injected interrupt | |
2088 | */ | |
2089 | static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, | |
2090 | struct kvm *kvm, int irq_source_id, int level, | |
2091 | bool line_status) | |
2092 | { | |
2093 | int ret; | |
2094 | struct s390_io_adapter *adapter; | |
2095 | ||
2096 | /* We're only interested in the 0->1 transition. */ | |
2097 | if (!level) | |
2098 | return 0; | |
2099 | adapter = get_io_adapter(kvm, e->adapter.adapter_id); | |
2100 | if (!adapter) | |
2101 | return -1; | |
2102 | down_read(&adapter->maps_lock); | |
2103 | ret = adapter_indicators_set(kvm, adapter, &e->adapter); | |
2104 | up_read(&adapter->maps_lock); | |
2105 | if ((ret > 0) && !adapter->masked) { | |
2106 | struct kvm_s390_interrupt s390int = { | |
2107 | .type = KVM_S390_INT_IO(1, 0, 0, 0), | |
2108 | .parm = 0, | |
2109 | .parm64 = (adapter->isc << 27) | 0x80000000, | |
2110 | }; | |
2111 | ret = kvm_s390_inject_vm(kvm, &s390int); | |
2112 | if (ret == 0) | |
2113 | ret = 1; | |
2114 | } | |
2115 | return ret; | |
2116 | } | |
2117 | ||
8ba918d4 | 2118 | int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, |
84223598 CH |
2119 | const struct kvm_irq_routing_entry *ue) |
2120 | { | |
2121 | int ret; | |
2122 | ||
2123 | switch (ue->type) { | |
2124 | case KVM_IRQ_ROUTING_S390_ADAPTER: | |
2125 | e->set = set_adapter_int; | |
2126 | e->adapter.summary_addr = ue->u.adapter.summary_addr; | |
2127 | e->adapter.ind_addr = ue->u.adapter.ind_addr; | |
2128 | e->adapter.summary_offset = ue->u.adapter.summary_offset; | |
2129 | e->adapter.ind_offset = ue->u.adapter.ind_offset; | |
2130 | e->adapter.adapter_id = ue->u.adapter.adapter_id; | |
2131 | ret = 0; | |
2132 | break; | |
2133 | default: | |
2134 | ret = -EINVAL; | |
2135 | } | |
2136 | ||
2137 | return ret; | |
2138 | } | |
2139 | ||
2140 | int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, | |
2141 | int irq_source_id, int level, bool line_status) | |
2142 | { | |
2143 | return -EINVAL; | |
2144 | } | |
816c7667 JF |
2145 | |
2146 | int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len) | |
2147 | { | |
2148 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2149 | struct kvm_s390_irq *buf; | |
2150 | int r = 0; | |
2151 | int n; | |
2152 | ||
2153 | buf = vmalloc(len); | |
2154 | if (!buf) | |
2155 | return -ENOMEM; | |
2156 | ||
2157 | if (copy_from_user((void *) buf, irqstate, len)) { | |
2158 | r = -EFAULT; | |
2159 | goto out_free; | |
2160 | } | |
2161 | ||
2162 | /* | |
2163 | * Don't allow setting the interrupt state | |
2164 | * when there are already interrupts pending | |
2165 | */ | |
2166 | spin_lock(&li->lock); | |
2167 | if (li->pending_irqs) { | |
2168 | r = -EBUSY; | |
2169 | goto out_unlock; | |
2170 | } | |
2171 | ||
2172 | for (n = 0; n < len / sizeof(*buf); n++) { | |
2173 | r = do_inject_vcpu(vcpu, &buf[n]); | |
2174 | if (r) | |
2175 | break; | |
2176 | } | |
2177 | ||
2178 | out_unlock: | |
2179 | spin_unlock(&li->lock); | |
2180 | out_free: | |
2181 | vfree(buf); | |
2182 | ||
2183 | return r; | |
2184 | } | |
2185 | ||
2186 | static void store_local_irq(struct kvm_s390_local_interrupt *li, | |
2187 | struct kvm_s390_irq *irq, | |
2188 | unsigned long irq_type) | |
2189 | { | |
2190 | switch (irq_type) { | |
2191 | case IRQ_PEND_MCHK_EX: | |
2192 | case IRQ_PEND_MCHK_REP: | |
2193 | irq->type = KVM_S390_MCHK; | |
2194 | irq->u.mchk = li->irq.mchk; | |
2195 | break; | |
2196 | case IRQ_PEND_PROG: | |
2197 | irq->type = KVM_S390_PROGRAM_INT; | |
2198 | irq->u.pgm = li->irq.pgm; | |
2199 | break; | |
2200 | case IRQ_PEND_PFAULT_INIT: | |
2201 | irq->type = KVM_S390_INT_PFAULT_INIT; | |
2202 | irq->u.ext = li->irq.ext; | |
2203 | break; | |
2204 | case IRQ_PEND_EXT_EXTERNAL: | |
2205 | irq->type = KVM_S390_INT_EXTERNAL_CALL; | |
2206 | irq->u.extcall = li->irq.extcall; | |
2207 | break; | |
2208 | case IRQ_PEND_EXT_CLOCK_COMP: | |
2209 | irq->type = KVM_S390_INT_CLOCK_COMP; | |
2210 | break; | |
2211 | case IRQ_PEND_EXT_CPU_TIMER: | |
2212 | irq->type = KVM_S390_INT_CPU_TIMER; | |
2213 | break; | |
2214 | case IRQ_PEND_SIGP_STOP: | |
2215 | irq->type = KVM_S390_SIGP_STOP; | |
2216 | irq->u.stop = li->irq.stop; | |
2217 | break; | |
2218 | case IRQ_PEND_RESTART: | |
2219 | irq->type = KVM_S390_RESTART; | |
2220 | break; | |
2221 | case IRQ_PEND_SET_PREFIX: | |
2222 | irq->type = KVM_S390_SIGP_SET_PREFIX; | |
2223 | irq->u.prefix = li->irq.prefix; | |
2224 | break; | |
2225 | } | |
2226 | } | |
2227 | ||
2228 | int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len) | |
2229 | { | |
2230 | uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl; | |
2231 | unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)]; | |
2232 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; | |
2233 | unsigned long pending_irqs; | |
2234 | struct kvm_s390_irq irq; | |
2235 | unsigned long irq_type; | |
2236 | int cpuaddr; | |
2237 | int n = 0; | |
2238 | ||
2239 | spin_lock(&li->lock); | |
2240 | pending_irqs = li->pending_irqs; | |
2241 | memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending, | |
2242 | sizeof(sigp_emerg_pending)); | |
2243 | spin_unlock(&li->lock); | |
2244 | ||
2245 | for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) { | |
2246 | memset(&irq, 0, sizeof(irq)); | |
2247 | if (irq_type == IRQ_PEND_EXT_EMERGENCY) | |
2248 | continue; | |
2249 | if (n + sizeof(irq) > len) | |
2250 | return -ENOBUFS; | |
2251 | store_local_irq(&vcpu->arch.local_int, &irq, irq_type); | |
2252 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2253 | return -EFAULT; | |
2254 | n += sizeof(irq); | |
2255 | } | |
2256 | ||
2257 | if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) { | |
2258 | for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) { | |
2259 | memset(&irq, 0, sizeof(irq)); | |
2260 | if (n + sizeof(irq) > len) | |
2261 | return -ENOBUFS; | |
2262 | irq.type = KVM_S390_INT_EMERGENCY; | |
2263 | irq.u.emerg.code = cpuaddr; | |
2264 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2265 | return -EFAULT; | |
2266 | n += sizeof(irq); | |
2267 | } | |
2268 | } | |
2269 | ||
2270 | if ((sigp_ctrl & SIGP_CTRL_C) && | |
2271 | (atomic_read(&vcpu->arch.sie_block->cpuflags) & | |
2272 | CPUSTAT_ECALL_PEND)) { | |
2273 | if (n + sizeof(irq) > len) | |
2274 | return -ENOBUFS; | |
2275 | memset(&irq, 0, sizeof(irq)); | |
2276 | irq.type = KVM_S390_INT_EXTERNAL_CALL; | |
2277 | irq.u.extcall.code = sigp_ctrl & SIGP_CTRL_SCN_MASK; | |
2278 | if (copy_to_user(&buf[n], &irq, sizeof(irq))) | |
2279 | return -EFAULT; | |
2280 | n += sizeof(irq); | |
2281 | } | |
2282 | ||
2283 | return n; | |
2284 | } |