Commit | Line | Data |
---|---|---|
453423dc | 1 | /* |
a53c8fab | 2 | * handling privileged instructions |
453423dc CB |
3 | * |
4 | * Copyright IBM Corp. 2008 | |
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 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | */ | |
13 | ||
14 | #include <linux/kvm.h> | |
5a0e3ad6 | 15 | #include <linux/gfp.h> |
453423dc CB |
16 | #include <linux/errno.h> |
17 | #include <asm/current.h> | |
18 | #include <asm/debug.h> | |
19 | #include <asm/ebcdic.h> | |
20 | #include <asm/sysinfo.h> | |
48a3e950 CH |
21 | #include <asm/ptrace.h> |
22 | #include <asm/compat.h> | |
453423dc CB |
23 | #include "gaccess.h" |
24 | #include "kvm-s390.h" | |
5786fffa | 25 | #include "trace.h" |
453423dc CB |
26 | |
27 | static int handle_set_prefix(struct kvm_vcpu *vcpu) | |
28 | { | |
453423dc CB |
29 | u64 operand2; |
30 | u32 address = 0; | |
31 | u8 tmp; | |
32 | ||
33 | vcpu->stat.instruction_spx++; | |
34 | ||
b1c571a5 | 35 | operand2 = kvm_s390_get_base_disp_s(vcpu); |
453423dc CB |
36 | |
37 | /* must be word boundary */ | |
38 | if (operand2 & 3) { | |
39 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
40 | goto out; | |
41 | } | |
42 | ||
43 | /* get the value */ | |
44 | if (get_guest_u32(vcpu, operand2, &address)) { | |
45 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
46 | goto out; | |
47 | } | |
48 | ||
49 | address = address & 0x7fffe000u; | |
50 | ||
51 | /* make sure that the new value is valid memory */ | |
52 | if (copy_from_guest_absolute(vcpu, &tmp, address, 1) || | |
53 | (copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1))) { | |
54 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
55 | goto out; | |
56 | } | |
57 | ||
8d26cf7b | 58 | kvm_s390_set_prefix(vcpu, address); |
453423dc CB |
59 | |
60 | VCPU_EVENT(vcpu, 5, "setting prefix to %x", address); | |
5786fffa | 61 | trace_kvm_s390_handle_prefix(vcpu, 1, address); |
453423dc CB |
62 | out: |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int handle_store_prefix(struct kvm_vcpu *vcpu) | |
67 | { | |
453423dc CB |
68 | u64 operand2; |
69 | u32 address; | |
70 | ||
71 | vcpu->stat.instruction_stpx++; | |
b1c571a5 CH |
72 | |
73 | operand2 = kvm_s390_get_base_disp_s(vcpu); | |
453423dc CB |
74 | |
75 | /* must be word boundary */ | |
76 | if (operand2 & 3) { | |
77 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
78 | goto out; | |
79 | } | |
80 | ||
81 | address = vcpu->arch.sie_block->prefix; | |
82 | address = address & 0x7fffe000u; | |
83 | ||
84 | /* get the value */ | |
85 | if (put_guest_u32(vcpu, operand2, address)) { | |
86 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
87 | goto out; | |
88 | } | |
89 | ||
90 | VCPU_EVENT(vcpu, 5, "storing prefix to %x", address); | |
5786fffa | 91 | trace_kvm_s390_handle_prefix(vcpu, 0, address); |
453423dc CB |
92 | out: |
93 | return 0; | |
94 | } | |
95 | ||
96 | static int handle_store_cpu_address(struct kvm_vcpu *vcpu) | |
97 | { | |
453423dc CB |
98 | u64 useraddr; |
99 | int rc; | |
100 | ||
101 | vcpu->stat.instruction_stap++; | |
b1c571a5 CH |
102 | |
103 | useraddr = kvm_s390_get_base_disp_s(vcpu); | |
453423dc CB |
104 | |
105 | if (useraddr & 1) { | |
106 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
107 | goto out; | |
108 | } | |
109 | ||
110 | rc = put_guest_u16(vcpu, useraddr, vcpu->vcpu_id); | |
111 | if (rc == -EFAULT) { | |
112 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
113 | goto out; | |
114 | } | |
115 | ||
33e19115 | 116 | VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr); |
5786fffa | 117 | trace_kvm_s390_handle_stap(vcpu, useraddr); |
453423dc CB |
118 | out: |
119 | return 0; | |
120 | } | |
121 | ||
122 | static int handle_skey(struct kvm_vcpu *vcpu) | |
123 | { | |
124 | vcpu->stat.instruction_storage_key++; | |
125 | vcpu->arch.sie_block->gpsw.addr -= 4; | |
126 | VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation"); | |
127 | return 0; | |
128 | } | |
129 | ||
fa6b7fe9 | 130 | static int handle_tpi(struct kvm_vcpu *vcpu) |
453423dc | 131 | { |
fa6b7fe9 CH |
132 | u64 addr; |
133 | struct kvm_s390_interrupt_info *inti; | |
134 | int cc; | |
135 | ||
136 | addr = kvm_s390_get_base_disp_s(vcpu); | |
137 | ||
138 | inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->run->s.regs.crs[6], 0); | |
139 | if (inti) { | |
140 | if (addr) { | |
141 | /* | |
142 | * Store the two-word I/O interruption code into the | |
143 | * provided area. | |
144 | */ | |
145 | put_guest_u16(vcpu, addr, inti->io.subchannel_id); | |
146 | put_guest_u16(vcpu, addr + 2, inti->io.subchannel_nr); | |
147 | put_guest_u32(vcpu, addr + 4, inti->io.io_int_parm); | |
148 | } else { | |
149 | /* | |
150 | * Store the three-word I/O interruption code into | |
151 | * the appropriate lowcore area. | |
152 | */ | |
153 | put_guest_u16(vcpu, 184, inti->io.subchannel_id); | |
154 | put_guest_u16(vcpu, 186, inti->io.subchannel_nr); | |
155 | put_guest_u32(vcpu, 188, inti->io.io_int_parm); | |
156 | put_guest_u32(vcpu, 192, inti->io.io_int_word); | |
157 | } | |
158 | cc = 1; | |
159 | } else | |
160 | cc = 0; | |
161 | kfree(inti); | |
162 | /* Set condition code and we're done. */ | |
453423dc | 163 | vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); |
fa6b7fe9 | 164 | vcpu->arch.sie_block->gpsw.mask |= (cc & 3ul) << 44; |
453423dc CB |
165 | return 0; |
166 | } | |
167 | ||
fa6b7fe9 CH |
168 | static int handle_tsch(struct kvm_vcpu *vcpu) |
169 | { | |
170 | struct kvm_s390_interrupt_info *inti; | |
171 | ||
172 | inti = kvm_s390_get_io_int(vcpu->kvm, 0, | |
173 | vcpu->run->s.regs.gprs[1]); | |
174 | ||
175 | /* | |
176 | * Prepare exit to userspace. | |
177 | * We indicate whether we dequeued a pending I/O interrupt | |
178 | * so that userspace can re-inject it if the instruction gets | |
179 | * a program check. While this may re-order the pending I/O | |
180 | * interrupts, this is no problem since the priority is kept | |
181 | * intact. | |
182 | */ | |
183 | vcpu->run->exit_reason = KVM_EXIT_S390_TSCH; | |
184 | vcpu->run->s390_tsch.dequeued = !!inti; | |
185 | if (inti) { | |
186 | vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id; | |
187 | vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr; | |
188 | vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm; | |
189 | vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word; | |
190 | } | |
191 | vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb; | |
192 | kfree(inti); | |
193 | return -EREMOTE; | |
194 | } | |
195 | ||
196 | static int handle_io_inst(struct kvm_vcpu *vcpu) | |
197 | { | |
198 | VCPU_EVENT(vcpu, 4, "%s", "I/O instruction"); | |
199 | ||
200 | if (vcpu->kvm->arch.css_support) { | |
201 | /* | |
202 | * Most I/O instructions will be handled by userspace. | |
203 | * Exceptions are tpi and the interrupt portion of tsch. | |
204 | */ | |
205 | if (vcpu->arch.sie_block->ipa == 0xb236) | |
206 | return handle_tpi(vcpu); | |
207 | if (vcpu->arch.sie_block->ipa == 0xb235) | |
208 | return handle_tsch(vcpu); | |
209 | /* Handle in userspace. */ | |
210 | return -EOPNOTSUPP; | |
211 | } else { | |
212 | /* | |
213 | * Set condition code 3 to stop the guest from issueing channel | |
214 | * I/O instructions. | |
215 | */ | |
216 | vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); | |
217 | vcpu->arch.sie_block->gpsw.mask |= (3 & 3ul) << 44; | |
218 | return 0; | |
219 | } | |
220 | } | |
221 | ||
453423dc CB |
222 | static int handle_stfl(struct kvm_vcpu *vcpu) |
223 | { | |
14375bc4 | 224 | unsigned int facility_list; |
453423dc CB |
225 | int rc; |
226 | ||
227 | vcpu->stat.instruction_stfl++; | |
a0046b6d | 228 | /* only pass the facility bits, which we can handle */ |
14375bc4 | 229 | facility_list = S390_lowcore.stfl_fac_list & 0xff00fff3; |
453423dc CB |
230 | |
231 | rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list), | |
232 | &facility_list, sizeof(facility_list)); | |
233 | if (rc == -EFAULT) | |
234 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
5786fffa | 235 | else { |
453423dc CB |
236 | VCPU_EVENT(vcpu, 5, "store facility list value %x", |
237 | facility_list); | |
5786fffa CH |
238 | trace_kvm_s390_handle_stfl(vcpu, facility_list); |
239 | } | |
453423dc CB |
240 | return 0; |
241 | } | |
242 | ||
48a3e950 CH |
243 | static void handle_new_psw(struct kvm_vcpu *vcpu) |
244 | { | |
245 | /* Check whether the new psw is enabled for machine checks. */ | |
246 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK) | |
247 | kvm_s390_deliver_pending_machine_checks(vcpu); | |
248 | } | |
249 | ||
250 | #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA) | |
251 | #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL | |
252 | #define PSW_ADDR_24 0x00000000000fffffUL | |
253 | #define PSW_ADDR_31 0x000000007fffffffUL | |
254 | ||
255 | int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu) | |
256 | { | |
257 | u64 addr; | |
258 | psw_compat_t new_psw; | |
259 | ||
260 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
261 | return kvm_s390_inject_program_int(vcpu, | |
262 | PGM_PRIVILEGED_OPERATION); | |
263 | ||
264 | addr = kvm_s390_get_base_disp_s(vcpu); | |
265 | ||
266 | if (addr & 7) { | |
267 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
268 | goto out; | |
269 | } | |
270 | ||
271 | if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw))) { | |
272 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
273 | goto out; | |
274 | } | |
275 | ||
276 | if (!(new_psw.mask & PSW32_MASK_BASE)) { | |
277 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
278 | goto out; | |
279 | } | |
280 | ||
281 | vcpu->arch.sie_block->gpsw.mask = | |
282 | (new_psw.mask & ~PSW32_MASK_BASE) << 32; | |
283 | vcpu->arch.sie_block->gpsw.addr = new_psw.addr; | |
284 | ||
285 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_UNASSIGNED) || | |
286 | (!(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) && | |
287 | (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_24)) || | |
288 | ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) == | |
289 | PSW_MASK_EA)) { | |
290 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
291 | goto out; | |
292 | } | |
293 | ||
294 | handle_new_psw(vcpu); | |
295 | out: | |
296 | return 0; | |
297 | } | |
298 | ||
299 | static int handle_lpswe(struct kvm_vcpu *vcpu) | |
300 | { | |
301 | u64 addr; | |
302 | psw_t new_psw; | |
303 | ||
304 | addr = kvm_s390_get_base_disp_s(vcpu); | |
305 | ||
306 | if (addr & 7) { | |
307 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
308 | goto out; | |
309 | } | |
310 | ||
311 | if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw))) { | |
312 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
313 | goto out; | |
314 | } | |
315 | ||
316 | vcpu->arch.sie_block->gpsw.mask = new_psw.mask; | |
317 | vcpu->arch.sie_block->gpsw.addr = new_psw.addr; | |
318 | ||
319 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_UNASSIGNED) || | |
320 | (((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) == | |
321 | PSW_MASK_BA) && | |
322 | (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_31)) || | |
323 | (!(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) && | |
324 | (vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_24)) || | |
325 | ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) == | |
326 | PSW_MASK_EA)) { | |
327 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
328 | goto out; | |
329 | } | |
330 | ||
331 | handle_new_psw(vcpu); | |
332 | out: | |
333 | return 0; | |
334 | } | |
335 | ||
453423dc CB |
336 | static int handle_stidp(struct kvm_vcpu *vcpu) |
337 | { | |
453423dc CB |
338 | u64 operand2; |
339 | int rc; | |
340 | ||
341 | vcpu->stat.instruction_stidp++; | |
b1c571a5 CH |
342 | |
343 | operand2 = kvm_s390_get_base_disp_s(vcpu); | |
453423dc CB |
344 | |
345 | if (operand2 & 7) { | |
346 | kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
347 | goto out; | |
348 | } | |
349 | ||
350 | rc = put_guest_u64(vcpu, operand2, vcpu->arch.stidp_data); | |
351 | if (rc == -EFAULT) { | |
352 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
353 | goto out; | |
354 | } | |
355 | ||
356 | VCPU_EVENT(vcpu, 5, "%s", "store cpu id"); | |
357 | out: | |
358 | return 0; | |
359 | } | |
360 | ||
361 | static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem) | |
362 | { | |
180c12fb | 363 | struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
453423dc CB |
364 | int cpus = 0; |
365 | int n; | |
366 | ||
b037a4f3 | 367 | spin_lock(&fi->lock); |
453423dc CB |
368 | for (n = 0; n < KVM_MAX_VCPUS; n++) |
369 | if (fi->local_int[n]) | |
370 | cpus++; | |
b037a4f3 | 371 | spin_unlock(&fi->lock); |
453423dc CB |
372 | |
373 | /* deal with other level 3 hypervisors */ | |
caf757c6 | 374 | if (stsi(mem, 3, 2, 2)) |
453423dc CB |
375 | mem->count = 0; |
376 | if (mem->count < 8) | |
377 | mem->count++; | |
378 | for (n = mem->count - 1; n > 0 ; n--) | |
379 | memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0])); | |
380 | ||
381 | mem->vm[0].cpus_total = cpus; | |
382 | mem->vm[0].cpus_configured = cpus; | |
383 | mem->vm[0].cpus_standby = 0; | |
384 | mem->vm[0].cpus_reserved = 0; | |
385 | mem->vm[0].caf = 1000; | |
386 | memcpy(mem->vm[0].name, "KVMguest", 8); | |
387 | ASCEBC(mem->vm[0].name, 8); | |
388 | memcpy(mem->vm[0].cpi, "KVM/Linux ", 16); | |
389 | ASCEBC(mem->vm[0].cpi, 16); | |
390 | } | |
391 | ||
392 | static int handle_stsi(struct kvm_vcpu *vcpu) | |
393 | { | |
5a32c1af CB |
394 | int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28; |
395 | int sel1 = vcpu->run->s.regs.gprs[0] & 0xff; | |
396 | int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff; | |
453423dc CB |
397 | u64 operand2; |
398 | unsigned long mem; | |
399 | ||
400 | vcpu->stat.instruction_stsi++; | |
401 | VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2); | |
402 | ||
b1c571a5 | 403 | operand2 = kvm_s390_get_base_disp_s(vcpu); |
453423dc CB |
404 | |
405 | if (operand2 & 0xfff && fc > 0) | |
406 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
407 | ||
408 | switch (fc) { | |
409 | case 0: | |
5a32c1af | 410 | vcpu->run->s.regs.gprs[0] = 3 << 28; |
453423dc CB |
411 | vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); |
412 | return 0; | |
413 | case 1: /* same handling for 1 and 2 */ | |
414 | case 2: | |
415 | mem = get_zeroed_page(GFP_KERNEL); | |
416 | if (!mem) | |
417 | goto out_fail; | |
caf757c6 | 418 | if (stsi((void *) mem, fc, sel1, sel2)) |
453423dc CB |
419 | goto out_mem; |
420 | break; | |
421 | case 3: | |
422 | if (sel1 != 2 || sel2 != 2) | |
423 | goto out_fail; | |
424 | mem = get_zeroed_page(GFP_KERNEL); | |
425 | if (!mem) | |
426 | goto out_fail; | |
427 | handle_stsi_3_2_2(vcpu, (void *) mem); | |
428 | break; | |
429 | default: | |
430 | goto out_fail; | |
431 | } | |
432 | ||
433 | if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) { | |
434 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
435 | goto out_mem; | |
436 | } | |
5786fffa | 437 | trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2); |
453423dc CB |
438 | free_page(mem); |
439 | vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); | |
5a32c1af | 440 | vcpu->run->s.regs.gprs[0] = 0; |
453423dc CB |
441 | return 0; |
442 | out_mem: | |
443 | free_page(mem); | |
444 | out_fail: | |
445 | /* condition code 3 */ | |
446 | vcpu->arch.sie_block->gpsw.mask |= 3ul << 44; | |
447 | return 0; | |
448 | } | |
449 | ||
f379aae5 | 450 | static const intercept_handler_t b2_handlers[256] = { |
453423dc CB |
451 | [0x02] = handle_stidp, |
452 | [0x10] = handle_set_prefix, | |
453 | [0x11] = handle_store_prefix, | |
454 | [0x12] = handle_store_cpu_address, | |
455 | [0x29] = handle_skey, | |
456 | [0x2a] = handle_skey, | |
457 | [0x2b] = handle_skey, | |
f379aae5 CH |
458 | [0x30] = handle_io_inst, |
459 | [0x31] = handle_io_inst, | |
460 | [0x32] = handle_io_inst, | |
461 | [0x33] = handle_io_inst, | |
462 | [0x34] = handle_io_inst, | |
463 | [0x35] = handle_io_inst, | |
464 | [0x36] = handle_io_inst, | |
465 | [0x37] = handle_io_inst, | |
466 | [0x38] = handle_io_inst, | |
467 | [0x39] = handle_io_inst, | |
468 | [0x3a] = handle_io_inst, | |
469 | [0x3b] = handle_io_inst, | |
470 | [0x3c] = handle_io_inst, | |
471 | [0x5f] = handle_io_inst, | |
472 | [0x74] = handle_io_inst, | |
473 | [0x76] = handle_io_inst, | |
453423dc CB |
474 | [0x7d] = handle_stsi, |
475 | [0xb1] = handle_stfl, | |
48a3e950 | 476 | [0xb2] = handle_lpswe, |
453423dc CB |
477 | }; |
478 | ||
70455a36 | 479 | int kvm_s390_handle_b2(struct kvm_vcpu *vcpu) |
453423dc CB |
480 | { |
481 | intercept_handler_t handler; | |
482 | ||
70455a36 CB |
483 | /* |
484 | * a lot of B2 instructions are priviledged. We first check for | |
25985edc | 485 | * the privileged ones, that we can handle in the kernel. If the |
70455a36 CB |
486 | * kernel can handle this instruction, we check for the problem |
487 | * state bit and (a) handle the instruction or (b) send a code 2 | |
488 | * program check. | |
489 | * Anything else goes to userspace.*/ | |
f379aae5 | 490 | handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; |
70455a36 CB |
491 | if (handler) { |
492 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
493 | return kvm_s390_inject_program_int(vcpu, | |
494 | PGM_PRIVILEGED_OPERATION); | |
495 | else | |
496 | return handler(vcpu); | |
497 | } | |
b8e660b8 | 498 | return -EOPNOTSUPP; |
453423dc | 499 | } |
bb25b9ba | 500 | |
48a3e950 CH |
501 | static int handle_epsw(struct kvm_vcpu *vcpu) |
502 | { | |
503 | int reg1, reg2; | |
504 | ||
505 | reg1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 24; | |
506 | reg2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; | |
507 | ||
508 | /* This basically extracts the mask half of the psw. */ | |
509 | vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000; | |
510 | vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32; | |
511 | if (reg2) { | |
512 | vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000; | |
513 | vcpu->run->s.regs.gprs[reg2] |= | |
514 | vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffff; | |
515 | } | |
516 | return 0; | |
517 | } | |
518 | ||
519 | static const intercept_handler_t b9_handlers[256] = { | |
520 | [0x8d] = handle_epsw, | |
f379aae5 | 521 | [0x9c] = handle_io_inst, |
48a3e950 CH |
522 | }; |
523 | ||
524 | int kvm_s390_handle_b9(struct kvm_vcpu *vcpu) | |
525 | { | |
526 | intercept_handler_t handler; | |
527 | ||
528 | /* This is handled just as for the B2 instructions. */ | |
529 | handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; | |
530 | if (handler) { | |
531 | if ((handler != handle_epsw) && | |
532 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)) | |
533 | return kvm_s390_inject_program_int(vcpu, | |
534 | PGM_PRIVILEGED_OPERATION); | |
535 | else | |
536 | return handler(vcpu); | |
537 | } | |
538 | return -EOPNOTSUPP; | |
539 | } | |
540 | ||
f379aae5 CH |
541 | static const intercept_handler_t eb_handlers[256] = { |
542 | [0x8a] = handle_io_inst, | |
543 | }; | |
544 | ||
545 | int kvm_s390_handle_priv_eb(struct kvm_vcpu *vcpu) | |
546 | { | |
547 | intercept_handler_t handler; | |
548 | ||
549 | /* All eb instructions that end up here are privileged. */ | |
550 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
551 | return kvm_s390_inject_program_int(vcpu, | |
552 | PGM_PRIVILEGED_OPERATION); | |
553 | handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff]; | |
554 | if (handler) | |
555 | return handler(vcpu); | |
556 | return -EOPNOTSUPP; | |
557 | } | |
558 | ||
bb25b9ba CB |
559 | static int handle_tprot(struct kvm_vcpu *vcpu) |
560 | { | |
b1c571a5 | 561 | u64 address1, address2; |
bb25b9ba | 562 | struct vm_area_struct *vma; |
1eddb85f | 563 | unsigned long user_address; |
bb25b9ba CB |
564 | |
565 | vcpu->stat.instruction_tprot++; | |
566 | ||
b1c571a5 CH |
567 | kvm_s390_get_base_disp_sse(vcpu, &address1, &address2); |
568 | ||
bb25b9ba CB |
569 | /* we only handle the Linux memory detection case: |
570 | * access key == 0 | |
571 | * guest DAT == off | |
572 | * everything else goes to userspace. */ | |
573 | if (address2 & 0xf0) | |
574 | return -EOPNOTSUPP; | |
575 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT) | |
576 | return -EOPNOTSUPP; | |
577 | ||
578 | ||
1eddb85f CB |
579 | /* we must resolve the address without holding the mmap semaphore. |
580 | * This is ok since the userspace hypervisor is not supposed to change | |
581 | * the mapping while the guest queries the memory. Otherwise the guest | |
582 | * might crash or get wrong info anyway. */ | |
583 | user_address = (unsigned long) __guestaddr_to_user(vcpu, address1); | |
584 | ||
bb25b9ba | 585 | down_read(¤t->mm->mmap_sem); |
1eddb85f | 586 | vma = find_vma(current->mm, user_address); |
bb25b9ba CB |
587 | if (!vma) { |
588 | up_read(¤t->mm->mmap_sem); | |
589 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
590 | } | |
591 | ||
592 | vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); | |
593 | if (!(vma->vm_flags & VM_WRITE) && (vma->vm_flags & VM_READ)) | |
594 | vcpu->arch.sie_block->gpsw.mask |= (1ul << 44); | |
595 | if (!(vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_READ)) | |
596 | vcpu->arch.sie_block->gpsw.mask |= (2ul << 44); | |
597 | ||
598 | up_read(¤t->mm->mmap_sem); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | int kvm_s390_handle_e5(struct kvm_vcpu *vcpu) | |
603 | { | |
604 | /* For e5xx... instructions we only handle TPROT */ | |
605 | if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01) | |
606 | return handle_tprot(vcpu); | |
607 | return -EOPNOTSUPP; | |
608 | } | |
609 | ||
8c3f61e2 CH |
610 | static int handle_sckpf(struct kvm_vcpu *vcpu) |
611 | { | |
612 | u32 value; | |
613 | ||
614 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
615 | return kvm_s390_inject_program_int(vcpu, | |
616 | PGM_PRIVILEGED_OPERATION); | |
617 | ||
618 | if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000) | |
619 | return kvm_s390_inject_program_int(vcpu, | |
620 | PGM_SPECIFICATION); | |
621 | ||
622 | value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff; | |
623 | vcpu->arch.sie_block->todpr = value; | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
77975357 | 628 | static const intercept_handler_t x01_handlers[256] = { |
8c3f61e2 CH |
629 | [0x07] = handle_sckpf, |
630 | }; | |
631 | ||
632 | int kvm_s390_handle_01(struct kvm_vcpu *vcpu) | |
633 | { | |
634 | intercept_handler_t handler; | |
635 | ||
636 | handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; | |
637 | if (handler) | |
638 | return handler(vcpu); | |
639 | return -EOPNOTSUPP; | |
640 | } |