Commit | Line | Data |
---|---|---|
453423dc | 1 | /* |
a53c8fab | 2 | * handling privileged instructions |
453423dc | 3 | * |
69d0d3a3 | 4 | * Copyright IBM Corp. 2008, 2013 |
453423dc CB |
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 | 16 | #include <linux/errno.h> |
b13b5dc7 | 17 | #include <linux/compat.h> |
7c959e82 | 18 | #include <asm/asm-offsets.h> |
e769ece3 | 19 | #include <asm/facility.h> |
453423dc CB |
20 | #include <asm/current.h> |
21 | #include <asm/debug.h> | |
22 | #include <asm/ebcdic.h> | |
23 | #include <asm/sysinfo.h> | |
69d0d3a3 CB |
24 | #include <asm/pgtable.h> |
25 | #include <asm/pgalloc.h> | |
26 | #include <asm/io.h> | |
48a3e950 CH |
27 | #include <asm/ptrace.h> |
28 | #include <asm/compat.h> | |
453423dc CB |
29 | #include "gaccess.h" |
30 | #include "kvm-s390.h" | |
5786fffa | 31 | #include "trace.h" |
453423dc | 32 | |
6a3f95a6 TH |
33 | /* Handle SCK (SET CLOCK) interception */ |
34 | static int handle_set_clock(struct kvm_vcpu *vcpu) | |
35 | { | |
36 | struct kvm_vcpu *cpup; | |
37 | s64 hostclk, val; | |
0e7a3f94 | 38 | int i, rc; |
8ae04b8f | 39 | ar_t ar; |
6a3f95a6 | 40 | u64 op2; |
6a3f95a6 TH |
41 | |
42 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
43 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
44 | ||
8ae04b8f | 45 | op2 = kvm_s390_get_base_disp_s(vcpu, &ar); |
6a3f95a6 TH |
46 | if (op2 & 7) /* Operand must be on a doubleword boundary */ |
47 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
8ae04b8f | 48 | rc = read_guest(vcpu, op2, ar, &val, sizeof(val)); |
0e7a3f94 HC |
49 | if (rc) |
50 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
6a3f95a6 TH |
51 | |
52 | if (store_tod_clock(&hostclk)) { | |
53 | kvm_s390_set_psw_cc(vcpu, 3); | |
54 | return 0; | |
55 | } | |
56 | val = (val - hostclk) & ~0x3fUL; | |
57 | ||
58 | mutex_lock(&vcpu->kvm->lock); | |
59 | kvm_for_each_vcpu(i, cpup, vcpu->kvm) | |
60 | cpup->arch.sie_block->epoch = val; | |
61 | mutex_unlock(&vcpu->kvm->lock); | |
62 | ||
63 | kvm_s390_set_psw_cc(vcpu, 0); | |
64 | return 0; | |
65 | } | |
66 | ||
453423dc CB |
67 | static int handle_set_prefix(struct kvm_vcpu *vcpu) |
68 | { | |
453423dc | 69 | u64 operand2; |
665170cb HC |
70 | u32 address; |
71 | int rc; | |
8ae04b8f | 72 | ar_t ar; |
453423dc CB |
73 | |
74 | vcpu->stat.instruction_spx++; | |
75 | ||
5087dfa6 TH |
76 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) |
77 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
78 | ||
8ae04b8f | 79 | operand2 = kvm_s390_get_base_disp_s(vcpu, &ar); |
453423dc CB |
80 | |
81 | /* must be word boundary */ | |
db4a29cb HC |
82 | if (operand2 & 3) |
83 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
453423dc CB |
84 | |
85 | /* get the value */ | |
8ae04b8f | 86 | rc = read_guest(vcpu, operand2, ar, &address, sizeof(address)); |
665170cb HC |
87 | if (rc) |
88 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
89 | ||
90 | address &= 0x7fffe000u; | |
91 | ||
92 | /* | |
93 | * Make sure the new value is valid memory. We only need to check the | |
94 | * first page, since address is 8k aligned and memory pieces are always | |
95 | * at least 1MB aligned and have at least a size of 1MB. | |
96 | */ | |
97 | if (kvm_is_error_gpa(vcpu->kvm, address)) | |
db4a29cb | 98 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
453423dc | 99 | |
8d26cf7b | 100 | kvm_s390_set_prefix(vcpu, address); |
453423dc CB |
101 | |
102 | VCPU_EVENT(vcpu, 5, "setting prefix to %x", address); | |
5786fffa | 103 | trace_kvm_s390_handle_prefix(vcpu, 1, address); |
453423dc CB |
104 | return 0; |
105 | } | |
106 | ||
107 | static int handle_store_prefix(struct kvm_vcpu *vcpu) | |
108 | { | |
453423dc CB |
109 | u64 operand2; |
110 | u32 address; | |
f748f4a7 | 111 | int rc; |
8ae04b8f | 112 | ar_t ar; |
453423dc CB |
113 | |
114 | vcpu->stat.instruction_stpx++; | |
b1c571a5 | 115 | |
5087dfa6 TH |
116 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) |
117 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
118 | ||
8ae04b8f | 119 | operand2 = kvm_s390_get_base_disp_s(vcpu, &ar); |
453423dc CB |
120 | |
121 | /* must be word boundary */ | |
db4a29cb HC |
122 | if (operand2 & 3) |
123 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
453423dc | 124 | |
fda902cb | 125 | address = kvm_s390_get_prefix(vcpu); |
453423dc CB |
126 | |
127 | /* get the value */ | |
8ae04b8f | 128 | rc = write_guest(vcpu, operand2, ar, &address, sizeof(address)); |
f748f4a7 HC |
129 | if (rc) |
130 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
453423dc CB |
131 | |
132 | VCPU_EVENT(vcpu, 5, "storing prefix to %x", address); | |
5786fffa | 133 | trace_kvm_s390_handle_prefix(vcpu, 0, address); |
453423dc CB |
134 | return 0; |
135 | } | |
136 | ||
137 | static int handle_store_cpu_address(struct kvm_vcpu *vcpu) | |
138 | { | |
8b96de0e HC |
139 | u16 vcpu_id = vcpu->vcpu_id; |
140 | u64 ga; | |
141 | int rc; | |
8ae04b8f | 142 | ar_t ar; |
453423dc CB |
143 | |
144 | vcpu->stat.instruction_stap++; | |
b1c571a5 | 145 | |
5087dfa6 TH |
146 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) |
147 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
148 | ||
8ae04b8f | 149 | ga = kvm_s390_get_base_disp_s(vcpu, &ar); |
453423dc | 150 | |
8b96de0e | 151 | if (ga & 1) |
db4a29cb | 152 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
453423dc | 153 | |
8ae04b8f | 154 | rc = write_guest(vcpu, ga, ar, &vcpu_id, sizeof(vcpu_id)); |
8b96de0e HC |
155 | if (rc) |
156 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
453423dc | 157 | |
8b96de0e HC |
158 | VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", ga); |
159 | trace_kvm_s390_handle_stap(vcpu, ga); | |
453423dc CB |
160 | return 0; |
161 | } | |
162 | ||
3ac8e380 | 163 | static int __skey_check_enable(struct kvm_vcpu *vcpu) |
693ffc08 | 164 | { |
3ac8e380 | 165 | int rc = 0; |
693ffc08 | 166 | if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE))) |
3ac8e380 | 167 | return rc; |
693ffc08 | 168 | |
3ac8e380 | 169 | rc = s390_enable_skey(); |
693ffc08 DD |
170 | trace_kvm_s390_skey_related_inst(vcpu); |
171 | vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE); | |
3ac8e380 | 172 | return rc; |
693ffc08 DD |
173 | } |
174 | ||
175 | ||
453423dc CB |
176 | static int handle_skey(struct kvm_vcpu *vcpu) |
177 | { | |
3ac8e380 | 178 | int rc = __skey_check_enable(vcpu); |
693ffc08 | 179 | |
3ac8e380 DD |
180 | if (rc) |
181 | return rc; | |
453423dc | 182 | vcpu->stat.instruction_storage_key++; |
5087dfa6 TH |
183 | |
184 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
185 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
186 | ||
04b41acd | 187 | kvm_s390_rewind_psw(vcpu, 4); |
453423dc CB |
188 | VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation"); |
189 | return 0; | |
190 | } | |
191 | ||
8a242234 HC |
192 | static int handle_ipte_interlock(struct kvm_vcpu *vcpu) |
193 | { | |
8a242234 | 194 | vcpu->stat.instruction_ipte_interlock++; |
04b41acd | 195 | if (psw_bits(vcpu->arch.sie_block->gpsw).p) |
8a242234 HC |
196 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); |
197 | wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu)); | |
04b41acd | 198 | kvm_s390_rewind_psw(vcpu, 4); |
8a242234 HC |
199 | VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation"); |
200 | return 0; | |
201 | } | |
202 | ||
aca84241 TH |
203 | static int handle_test_block(struct kvm_vcpu *vcpu) |
204 | { | |
aca84241 TH |
205 | gpa_t addr; |
206 | int reg2; | |
207 | ||
208 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
209 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
210 | ||
211 | kvm_s390_get_regs_rre(vcpu, NULL, ®2); | |
212 | addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; | |
e45efa28 | 213 | addr = kvm_s390_logical_to_effective(vcpu, addr); |
dd9e5b7b | 214 | if (kvm_s390_check_low_addr_prot_real(vcpu, addr)) |
e45efa28 | 215 | return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); |
aca84241 TH |
216 | addr = kvm_s390_real_to_abs(vcpu, addr); |
217 | ||
ef23e779 | 218 | if (kvm_is_error_gpa(vcpu->kvm, addr)) |
aca84241 TH |
219 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
220 | /* | |
221 | * We don't expect errors on modern systems, and do not care | |
222 | * about storage keys (yet), so let's just clear the page. | |
223 | */ | |
ef23e779 | 224 | if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE)) |
aca84241 TH |
225 | return -EFAULT; |
226 | kvm_s390_set_psw_cc(vcpu, 0); | |
227 | vcpu->run->s.regs.gprs[0] = 0; | |
228 | return 0; | |
229 | } | |
230 | ||
fa6b7fe9 | 231 | static int handle_tpi(struct kvm_vcpu *vcpu) |
453423dc | 232 | { |
fa6b7fe9 | 233 | struct kvm_s390_interrupt_info *inti; |
4799b557 HC |
234 | unsigned long len; |
235 | u32 tpi_data[3]; | |
261520dc | 236 | int rc; |
7c959e82 | 237 | u64 addr; |
8ae04b8f | 238 | ar_t ar; |
fa6b7fe9 | 239 | |
8ae04b8f | 240 | addr = kvm_s390_get_base_disp_s(vcpu, &ar); |
db4a29cb HC |
241 | if (addr & 3) |
242 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
261520dc | 243 | |
f092669e | 244 | inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0); |
261520dc DH |
245 | if (!inti) { |
246 | kvm_s390_set_psw_cc(vcpu, 0); | |
247 | return 0; | |
248 | } | |
249 | ||
4799b557 HC |
250 | tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr; |
251 | tpi_data[1] = inti->io.io_int_parm; | |
252 | tpi_data[2] = inti->io.io_int_word; | |
7c959e82 HC |
253 | if (addr) { |
254 | /* | |
255 | * Store the two-word I/O interruption code into the | |
256 | * provided area. | |
257 | */ | |
4799b557 | 258 | len = sizeof(tpi_data) - 4; |
8ae04b8f | 259 | rc = write_guest(vcpu, addr, ar, &tpi_data, len); |
261520dc DH |
260 | if (rc) { |
261 | rc = kvm_s390_inject_prog_cond(vcpu, rc); | |
262 | goto reinject_interrupt; | |
263 | } | |
7c959e82 HC |
264 | } else { |
265 | /* | |
266 | * Store the three-word I/O interruption code into | |
267 | * the appropriate lowcore area. | |
268 | */ | |
4799b557 | 269 | len = sizeof(tpi_data); |
261520dc DH |
270 | if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len)) { |
271 | /* failed writes to the low core are not recoverable */ | |
4799b557 | 272 | rc = -EFAULT; |
261520dc DH |
273 | goto reinject_interrupt; |
274 | } | |
7c959e82 | 275 | } |
261520dc DH |
276 | |
277 | /* irq was successfully handed to the guest */ | |
278 | kfree(inti); | |
279 | kvm_s390_set_psw_cc(vcpu, 1); | |
280 | return 0; | |
281 | reinject_interrupt: | |
2f32d4ea CH |
282 | /* |
283 | * If we encounter a problem storing the interruption code, the | |
284 | * instruction is suppressed from the guest's view: reinject the | |
285 | * interrupt. | |
286 | */ | |
15462e37 DH |
287 | if (kvm_s390_reinject_io_int(vcpu->kvm, inti)) { |
288 | kfree(inti); | |
289 | rc = -EFAULT; | |
290 | } | |
261520dc | 291 | /* don't set the cc, a pgm irq was injected or we drop to user space */ |
4799b557 | 292 | return rc ? -EFAULT : 0; |
453423dc CB |
293 | } |
294 | ||
fa6b7fe9 CH |
295 | static int handle_tsch(struct kvm_vcpu *vcpu) |
296 | { | |
297 | struct kvm_s390_interrupt_info *inti; | |
298 | ||
299 | inti = kvm_s390_get_io_int(vcpu->kvm, 0, | |
300 | vcpu->run->s.regs.gprs[1]); | |
301 | ||
302 | /* | |
303 | * Prepare exit to userspace. | |
304 | * We indicate whether we dequeued a pending I/O interrupt | |
305 | * so that userspace can re-inject it if the instruction gets | |
306 | * a program check. While this may re-order the pending I/O | |
307 | * interrupts, this is no problem since the priority is kept | |
308 | * intact. | |
309 | */ | |
310 | vcpu->run->exit_reason = KVM_EXIT_S390_TSCH; | |
311 | vcpu->run->s390_tsch.dequeued = !!inti; | |
312 | if (inti) { | |
313 | vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id; | |
314 | vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr; | |
315 | vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm; | |
316 | vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word; | |
317 | } | |
318 | vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb; | |
319 | kfree(inti); | |
320 | return -EREMOTE; | |
321 | } | |
322 | ||
323 | static int handle_io_inst(struct kvm_vcpu *vcpu) | |
324 | { | |
325 | VCPU_EVENT(vcpu, 4, "%s", "I/O instruction"); | |
326 | ||
5087dfa6 TH |
327 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) |
328 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
329 | ||
fa6b7fe9 CH |
330 | if (vcpu->kvm->arch.css_support) { |
331 | /* | |
332 | * Most I/O instructions will be handled by userspace. | |
333 | * Exceptions are tpi and the interrupt portion of tsch. | |
334 | */ | |
335 | if (vcpu->arch.sie_block->ipa == 0xb236) | |
336 | return handle_tpi(vcpu); | |
337 | if (vcpu->arch.sie_block->ipa == 0xb235) | |
338 | return handle_tsch(vcpu); | |
339 | /* Handle in userspace. */ | |
340 | return -EOPNOTSUPP; | |
341 | } else { | |
342 | /* | |
b4a96015 | 343 | * Set condition code 3 to stop the guest from issuing channel |
fa6b7fe9 CH |
344 | * I/O instructions. |
345 | */ | |
ea828ebf | 346 | kvm_s390_set_psw_cc(vcpu, 3); |
fa6b7fe9 CH |
347 | return 0; |
348 | } | |
349 | } | |
350 | ||
453423dc CB |
351 | static int handle_stfl(struct kvm_vcpu *vcpu) |
352 | { | |
453423dc | 353 | int rc; |
9d8d5786 | 354 | unsigned int fac; |
453423dc CB |
355 | |
356 | vcpu->stat.instruction_stfl++; | |
5087dfa6 TH |
357 | |
358 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
359 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
360 | ||
9d8d5786 MM |
361 | /* |
362 | * We need to shift the lower 32 facility bits (bit 0-31) from a u64 | |
363 | * into a u32 memory representation. They will remain bits 0-31. | |
364 | */ | |
981467c9 | 365 | fac = *vcpu->kvm->arch.model.fac->list >> 32; |
0f9701c6 | 366 | rc = write_guest_lc(vcpu, offsetof(struct _lowcore, stfl_fac_list), |
9d8d5786 | 367 | &fac, sizeof(fac)); |
dc5008b9 | 368 | if (rc) |
0f9701c6 | 369 | return rc; |
9d8d5786 MM |
370 | VCPU_EVENT(vcpu, 5, "store facility list value %x", fac); |
371 | trace_kvm_s390_handle_stfl(vcpu, fac); | |
453423dc CB |
372 | return 0; |
373 | } | |
374 | ||
48a3e950 CH |
375 | #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA) |
376 | #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL | |
d21683ea | 377 | #define PSW_ADDR_24 0x0000000000ffffffUL |
48a3e950 CH |
378 | #define PSW_ADDR_31 0x000000007fffffffUL |
379 | ||
a3fb577e TH |
380 | int is_valid_psw(psw_t *psw) |
381 | { | |
3736b874 HC |
382 | if (psw->mask & PSW_MASK_UNASSIGNED) |
383 | return 0; | |
384 | if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) { | |
385 | if (psw->addr & ~PSW_ADDR_31) | |
386 | return 0; | |
387 | } | |
388 | if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24)) | |
389 | return 0; | |
390 | if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA) | |
391 | return 0; | |
a3fb577e TH |
392 | if (psw->addr & 1) |
393 | return 0; | |
3736b874 HC |
394 | return 1; |
395 | } | |
396 | ||
48a3e950 CH |
397 | int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu) |
398 | { | |
3736b874 | 399 | psw_t *gpsw = &vcpu->arch.sie_block->gpsw; |
48a3e950 | 400 | psw_compat_t new_psw; |
3736b874 | 401 | u64 addr; |
2d8bcaed | 402 | int rc; |
8ae04b8f | 403 | ar_t ar; |
48a3e950 | 404 | |
3736b874 | 405 | if (gpsw->mask & PSW_MASK_PSTATE) |
208dd756 TH |
406 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); |
407 | ||
8ae04b8f | 408 | addr = kvm_s390_get_base_disp_s(vcpu, &ar); |
6fd0fcc9 HC |
409 | if (addr & 7) |
410 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
2d8bcaed | 411 | |
8ae04b8f | 412 | rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw)); |
2d8bcaed HC |
413 | if (rc) |
414 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
6fd0fcc9 HC |
415 | if (!(new_psw.mask & PSW32_MASK_BASE)) |
416 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
3736b874 HC |
417 | gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32; |
418 | gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE; | |
419 | gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE; | |
420 | if (!is_valid_psw(gpsw)) | |
6fd0fcc9 | 421 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
48a3e950 CH |
422 | return 0; |
423 | } | |
424 | ||
425 | static int handle_lpswe(struct kvm_vcpu *vcpu) | |
426 | { | |
48a3e950 | 427 | psw_t new_psw; |
3736b874 | 428 | u64 addr; |
2d8bcaed | 429 | int rc; |
8ae04b8f | 430 | ar_t ar; |
48a3e950 | 431 | |
5087dfa6 TH |
432 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) |
433 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
434 | ||
8ae04b8f | 435 | addr = kvm_s390_get_base_disp_s(vcpu, &ar); |
6fd0fcc9 HC |
436 | if (addr & 7) |
437 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
8ae04b8f | 438 | rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw)); |
2d8bcaed HC |
439 | if (rc) |
440 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
3736b874 HC |
441 | vcpu->arch.sie_block->gpsw = new_psw; |
442 | if (!is_valid_psw(&vcpu->arch.sie_block->gpsw)) | |
6fd0fcc9 | 443 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
48a3e950 CH |
444 | return 0; |
445 | } | |
446 | ||
453423dc CB |
447 | static int handle_stidp(struct kvm_vcpu *vcpu) |
448 | { | |
7d777d78 | 449 | u64 stidp_data = vcpu->arch.stidp_data; |
453423dc | 450 | u64 operand2; |
7d777d78 | 451 | int rc; |
8ae04b8f | 452 | ar_t ar; |
453423dc CB |
453 | |
454 | vcpu->stat.instruction_stidp++; | |
b1c571a5 | 455 | |
5087dfa6 TH |
456 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) |
457 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
458 | ||
8ae04b8f | 459 | operand2 = kvm_s390_get_base_disp_s(vcpu, &ar); |
453423dc | 460 | |
db4a29cb HC |
461 | if (operand2 & 7) |
462 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
453423dc | 463 | |
8ae04b8f | 464 | rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data)); |
7d777d78 HC |
465 | if (rc) |
466 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
453423dc CB |
467 | |
468 | VCPU_EVENT(vcpu, 5, "%s", "store cpu id"); | |
453423dc CB |
469 | return 0; |
470 | } | |
471 | ||
472 | static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem) | |
473 | { | |
453423dc CB |
474 | int cpus = 0; |
475 | int n; | |
476 | ||
ff520a63 | 477 | cpus = atomic_read(&vcpu->kvm->online_vcpus); |
453423dc CB |
478 | |
479 | /* deal with other level 3 hypervisors */ | |
caf757c6 | 480 | if (stsi(mem, 3, 2, 2)) |
453423dc CB |
481 | mem->count = 0; |
482 | if (mem->count < 8) | |
483 | mem->count++; | |
484 | for (n = mem->count - 1; n > 0 ; n--) | |
485 | memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0])); | |
486 | ||
b75f4c9a | 487 | memset(&mem->vm[0], 0, sizeof(mem->vm[0])); |
453423dc CB |
488 | mem->vm[0].cpus_total = cpus; |
489 | mem->vm[0].cpus_configured = cpus; | |
490 | mem->vm[0].cpus_standby = 0; | |
491 | mem->vm[0].cpus_reserved = 0; | |
492 | mem->vm[0].caf = 1000; | |
493 | memcpy(mem->vm[0].name, "KVMguest", 8); | |
494 | ASCEBC(mem->vm[0].name, 8); | |
495 | memcpy(mem->vm[0].cpi, "KVM/Linux ", 16); | |
496 | ASCEBC(mem->vm[0].cpi, 16); | |
497 | } | |
498 | ||
499 | static int handle_stsi(struct kvm_vcpu *vcpu) | |
500 | { | |
5a32c1af CB |
501 | int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28; |
502 | int sel1 = vcpu->run->s.regs.gprs[0] & 0xff; | |
503 | int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff; | |
c51f068c | 504 | unsigned long mem = 0; |
453423dc | 505 | u64 operand2; |
db4a29cb | 506 | int rc = 0; |
8ae04b8f | 507 | ar_t ar; |
453423dc CB |
508 | |
509 | vcpu->stat.instruction_stsi++; | |
510 | VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2); | |
511 | ||
5087dfa6 TH |
512 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) |
513 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
514 | ||
87d41fb4 | 515 | if (fc > 3) { |
ea828ebf | 516 | kvm_s390_set_psw_cc(vcpu, 3); |
87d41fb4 TH |
517 | return 0; |
518 | } | |
453423dc | 519 | |
87d41fb4 TH |
520 | if (vcpu->run->s.regs.gprs[0] & 0x0fffff00 |
521 | || vcpu->run->s.regs.gprs[1] & 0xffff0000) | |
453423dc CB |
522 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
523 | ||
87d41fb4 | 524 | if (fc == 0) { |
5a32c1af | 525 | vcpu->run->s.regs.gprs[0] = 3 << 28; |
ea828ebf | 526 | kvm_s390_set_psw_cc(vcpu, 0); |
453423dc | 527 | return 0; |
87d41fb4 TH |
528 | } |
529 | ||
8ae04b8f | 530 | operand2 = kvm_s390_get_base_disp_s(vcpu, &ar); |
87d41fb4 TH |
531 | |
532 | if (operand2 & 0xfff) | |
533 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
534 | ||
535 | switch (fc) { | |
453423dc CB |
536 | case 1: /* same handling for 1 and 2 */ |
537 | case 2: | |
538 | mem = get_zeroed_page(GFP_KERNEL); | |
539 | if (!mem) | |
c51f068c | 540 | goto out_no_data; |
caf757c6 | 541 | if (stsi((void *) mem, fc, sel1, sel2)) |
c51f068c | 542 | goto out_no_data; |
453423dc CB |
543 | break; |
544 | case 3: | |
545 | if (sel1 != 2 || sel2 != 2) | |
c51f068c | 546 | goto out_no_data; |
453423dc CB |
547 | mem = get_zeroed_page(GFP_KERNEL); |
548 | if (!mem) | |
c51f068c | 549 | goto out_no_data; |
453423dc CB |
550 | handle_stsi_3_2_2(vcpu, (void *) mem); |
551 | break; | |
453423dc CB |
552 | } |
553 | ||
8ae04b8f | 554 | rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE); |
645c5bc1 HC |
555 | if (rc) { |
556 | rc = kvm_s390_inject_prog_cond(vcpu, rc); | |
557 | goto out; | |
453423dc | 558 | } |
5786fffa | 559 | trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2); |
453423dc | 560 | free_page(mem); |
ea828ebf | 561 | kvm_s390_set_psw_cc(vcpu, 0); |
5a32c1af | 562 | vcpu->run->s.regs.gprs[0] = 0; |
453423dc | 563 | return 0; |
c51f068c | 564 | out_no_data: |
ea828ebf | 565 | kvm_s390_set_psw_cc(vcpu, 3); |
645c5bc1 | 566 | out: |
c51f068c | 567 | free_page(mem); |
db4a29cb | 568 | return rc; |
453423dc CB |
569 | } |
570 | ||
f379aae5 | 571 | static const intercept_handler_t b2_handlers[256] = { |
453423dc | 572 | [0x02] = handle_stidp, |
6a3f95a6 | 573 | [0x04] = handle_set_clock, |
453423dc CB |
574 | [0x10] = handle_set_prefix, |
575 | [0x11] = handle_store_prefix, | |
576 | [0x12] = handle_store_cpu_address, | |
8a242234 | 577 | [0x21] = handle_ipte_interlock, |
453423dc CB |
578 | [0x29] = handle_skey, |
579 | [0x2a] = handle_skey, | |
580 | [0x2b] = handle_skey, | |
aca84241 | 581 | [0x2c] = handle_test_block, |
f379aae5 CH |
582 | [0x30] = handle_io_inst, |
583 | [0x31] = handle_io_inst, | |
584 | [0x32] = handle_io_inst, | |
585 | [0x33] = handle_io_inst, | |
586 | [0x34] = handle_io_inst, | |
587 | [0x35] = handle_io_inst, | |
588 | [0x36] = handle_io_inst, | |
589 | [0x37] = handle_io_inst, | |
590 | [0x38] = handle_io_inst, | |
591 | [0x39] = handle_io_inst, | |
592 | [0x3a] = handle_io_inst, | |
593 | [0x3b] = handle_io_inst, | |
594 | [0x3c] = handle_io_inst, | |
8a242234 | 595 | [0x50] = handle_ipte_interlock, |
f379aae5 CH |
596 | [0x5f] = handle_io_inst, |
597 | [0x74] = handle_io_inst, | |
598 | [0x76] = handle_io_inst, | |
453423dc CB |
599 | [0x7d] = handle_stsi, |
600 | [0xb1] = handle_stfl, | |
48a3e950 | 601 | [0xb2] = handle_lpswe, |
453423dc CB |
602 | }; |
603 | ||
70455a36 | 604 | int kvm_s390_handle_b2(struct kvm_vcpu *vcpu) |
453423dc CB |
605 | { |
606 | intercept_handler_t handler; | |
607 | ||
70455a36 | 608 | /* |
5087dfa6 TH |
609 | * A lot of B2 instructions are priviledged. Here we check for |
610 | * the privileged ones, that we can handle in the kernel. | |
611 | * Anything else goes to userspace. | |
612 | */ | |
f379aae5 | 613 | handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; |
5087dfa6 TH |
614 | if (handler) |
615 | return handler(vcpu); | |
616 | ||
b8e660b8 | 617 | return -EOPNOTSUPP; |
453423dc | 618 | } |
bb25b9ba | 619 | |
48a3e950 CH |
620 | static int handle_epsw(struct kvm_vcpu *vcpu) |
621 | { | |
622 | int reg1, reg2; | |
623 | ||
aeb87c3c | 624 | kvm_s390_get_regs_rre(vcpu, ®1, ®2); |
48a3e950 CH |
625 | |
626 | /* This basically extracts the mask half of the psw. */ | |
843200e7 | 627 | vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL; |
48a3e950 CH |
628 | vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32; |
629 | if (reg2) { | |
843200e7 | 630 | vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL; |
48a3e950 | 631 | vcpu->run->s.regs.gprs[reg2] |= |
843200e7 | 632 | vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL; |
48a3e950 CH |
633 | } |
634 | return 0; | |
635 | } | |
636 | ||
69d0d3a3 CB |
637 | #define PFMF_RESERVED 0xfffc0101UL |
638 | #define PFMF_SK 0x00020000UL | |
639 | #define PFMF_CF 0x00010000UL | |
640 | #define PFMF_UI 0x00008000UL | |
641 | #define PFMF_FSC 0x00007000UL | |
642 | #define PFMF_NQ 0x00000800UL | |
643 | #define PFMF_MR 0x00000400UL | |
644 | #define PFMF_MC 0x00000200UL | |
645 | #define PFMF_KEY 0x000000feUL | |
646 | ||
647 | static int handle_pfmf(struct kvm_vcpu *vcpu) | |
648 | { | |
649 | int reg1, reg2; | |
650 | unsigned long start, end; | |
651 | ||
652 | vcpu->stat.instruction_pfmf++; | |
653 | ||
654 | kvm_s390_get_regs_rre(vcpu, ®1, ®2); | |
655 | ||
656 | if (!MACHINE_HAS_PFMF) | |
657 | return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); | |
658 | ||
659 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
208dd756 | 660 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); |
69d0d3a3 CB |
661 | |
662 | if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED) | |
663 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
664 | ||
665 | /* Only provide non-quiescing support if the host supports it */ | |
e769ece3 | 666 | if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && !test_facility(14)) |
69d0d3a3 CB |
667 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
668 | ||
669 | /* No support for conditional-SSKE */ | |
670 | if (vcpu->run->s.regs.gprs[reg1] & (PFMF_MR | PFMF_MC)) | |
671 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
672 | ||
673 | start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK; | |
a02689fe | 674 | start = kvm_s390_logical_to_effective(vcpu, start); |
fb34c603 | 675 | |
69d0d3a3 CB |
676 | switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) { |
677 | case 0x00000000: | |
678 | end = (start + (1UL << 12)) & ~((1UL << 12) - 1); | |
679 | break; | |
680 | case 0x00001000: | |
681 | end = (start + (1UL << 20)) & ~((1UL << 20) - 1); | |
682 | break; | |
683 | /* We dont support EDAT2 | |
684 | case 0x00002000: | |
685 | end = (start + (1UL << 31)) & ~((1UL << 31) - 1); | |
686 | break;*/ | |
687 | default: | |
688 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
689 | } | |
a02689fe TH |
690 | |
691 | if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) { | |
dd9e5b7b | 692 | if (kvm_s390_check_low_addr_prot_real(vcpu, start)) |
a02689fe TH |
693 | return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); |
694 | } | |
695 | ||
69d0d3a3 | 696 | while (start < end) { |
fb34c603 TH |
697 | unsigned long useraddr, abs_addr; |
698 | ||
699 | /* Translate guest address to host address */ | |
700 | if ((vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) == 0) | |
701 | abs_addr = kvm_s390_real_to_abs(vcpu, start); | |
702 | else | |
703 | abs_addr = start; | |
704 | useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(abs_addr)); | |
705 | if (kvm_is_error_hva(useraddr)) | |
69d0d3a3 CB |
706 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
707 | ||
708 | if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) { | |
709 | if (clear_user((void __user *)useraddr, PAGE_SIZE)) | |
710 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
711 | } | |
712 | ||
713 | if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) { | |
3ac8e380 DD |
714 | int rc = __skey_check_enable(vcpu); |
715 | ||
716 | if (rc) | |
717 | return rc; | |
69d0d3a3 CB |
718 | if (set_guest_storage_key(current->mm, useraddr, |
719 | vcpu->run->s.regs.gprs[reg1] & PFMF_KEY, | |
720 | vcpu->run->s.regs.gprs[reg1] & PFMF_NQ)) | |
721 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
722 | } | |
723 | ||
724 | start += PAGE_SIZE; | |
725 | } | |
726 | if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) | |
727 | vcpu->run->s.regs.gprs[reg2] = end; | |
728 | return 0; | |
729 | } | |
730 | ||
b31288fa KW |
731 | static int handle_essa(struct kvm_vcpu *vcpu) |
732 | { | |
733 | /* entries expected to be 1FF */ | |
734 | int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3; | |
735 | unsigned long *cbrlo, cbrle; | |
736 | struct gmap *gmap; | |
737 | int i; | |
738 | ||
739 | VCPU_EVENT(vcpu, 5, "cmma release %d pages", entries); | |
740 | gmap = vcpu->arch.gmap; | |
741 | vcpu->stat.instruction_essa++; | |
b31605c1 | 742 | if (!kvm_s390_cmma_enabled(vcpu->kvm)) |
b31288fa KW |
743 | return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); |
744 | ||
745 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
746 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
747 | ||
748 | if (((vcpu->arch.sie_block->ipb & 0xf0000000) >> 28) > 6) | |
749 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
750 | ||
751 | /* Rewind PSW to repeat the ESSA instruction */ | |
04b41acd | 752 | kvm_s390_rewind_psw(vcpu, 4); |
b31288fa KW |
753 | vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */ |
754 | cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo); | |
755 | down_read(&gmap->mm->mmap_sem); | |
756 | for (i = 0; i < entries; ++i) { | |
757 | cbrle = cbrlo[i]; | |
758 | if (unlikely(cbrle & ~PAGE_MASK || cbrle < 2 * PAGE_SIZE)) | |
759 | /* invalid entry */ | |
760 | break; | |
761 | /* try to free backing */ | |
6e0a0431 | 762 | __gmap_zap(gmap, cbrle); |
b31288fa KW |
763 | } |
764 | up_read(&gmap->mm->mmap_sem); | |
765 | if (i < entries) | |
766 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
767 | return 0; | |
768 | } | |
769 | ||
48a3e950 | 770 | static const intercept_handler_t b9_handlers[256] = { |
8a242234 | 771 | [0x8a] = handle_ipte_interlock, |
48a3e950 | 772 | [0x8d] = handle_epsw, |
8a242234 HC |
773 | [0x8e] = handle_ipte_interlock, |
774 | [0x8f] = handle_ipte_interlock, | |
b31288fa | 775 | [0xab] = handle_essa, |
69d0d3a3 | 776 | [0xaf] = handle_pfmf, |
48a3e950 CH |
777 | }; |
778 | ||
779 | int kvm_s390_handle_b9(struct kvm_vcpu *vcpu) | |
780 | { | |
781 | intercept_handler_t handler; | |
782 | ||
783 | /* This is handled just as for the B2 instructions. */ | |
784 | handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; | |
5087dfa6 TH |
785 | if (handler) |
786 | return handler(vcpu); | |
787 | ||
48a3e950 CH |
788 | return -EOPNOTSUPP; |
789 | } | |
790 | ||
953ed88d TH |
791 | int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu) |
792 | { | |
793 | int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; | |
794 | int reg3 = vcpu->arch.sie_block->ipa & 0x000f; | |
fc56eb66 HC |
795 | int reg, rc, nr_regs; |
796 | u32 ctl_array[16]; | |
f987a3ee | 797 | u64 ga; |
8ae04b8f | 798 | ar_t ar; |
953ed88d TH |
799 | |
800 | vcpu->stat.instruction_lctl++; | |
801 | ||
802 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
803 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
804 | ||
8ae04b8f | 805 | ga = kvm_s390_get_base_disp_rs(vcpu, &ar); |
953ed88d | 806 | |
f987a3ee | 807 | if (ga & 3) |
953ed88d TH |
808 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
809 | ||
f987a3ee HC |
810 | VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga); |
811 | trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga); | |
953ed88d | 812 | |
fc56eb66 | 813 | nr_regs = ((reg3 - reg1) & 0xf) + 1; |
8ae04b8f | 814 | rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32)); |
fc56eb66 HC |
815 | if (rc) |
816 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
953ed88d | 817 | reg = reg1; |
fc56eb66 | 818 | nr_regs = 0; |
953ed88d | 819 | do { |
953ed88d | 820 | vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul; |
fc56eb66 | 821 | vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++]; |
953ed88d TH |
822 | if (reg == reg3) |
823 | break; | |
824 | reg = (reg + 1) % 16; | |
825 | } while (1); | |
2dca485f | 826 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
953ed88d TH |
827 | return 0; |
828 | } | |
829 | ||
aba07508 DH |
830 | int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu) |
831 | { | |
832 | int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; | |
833 | int reg3 = vcpu->arch.sie_block->ipa & 0x000f; | |
fc56eb66 HC |
834 | int reg, rc, nr_regs; |
835 | u32 ctl_array[16]; | |
aba07508 | 836 | u64 ga; |
8ae04b8f | 837 | ar_t ar; |
aba07508 DH |
838 | |
839 | vcpu->stat.instruction_stctl++; | |
840 | ||
841 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
842 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
843 | ||
8ae04b8f | 844 | ga = kvm_s390_get_base_disp_rs(vcpu, &ar); |
aba07508 DH |
845 | |
846 | if (ga & 3) | |
847 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
848 | ||
849 | VCPU_EVENT(vcpu, 5, "stctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga); | |
850 | trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga); | |
851 | ||
852 | reg = reg1; | |
fc56eb66 | 853 | nr_regs = 0; |
aba07508 | 854 | do { |
fc56eb66 | 855 | ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg]; |
aba07508 DH |
856 | if (reg == reg3) |
857 | break; | |
858 | reg = (reg + 1) % 16; | |
859 | } while (1); | |
8ae04b8f | 860 | rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32)); |
fc56eb66 | 861 | return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0; |
aba07508 DH |
862 | } |
863 | ||
953ed88d TH |
864 | static int handle_lctlg(struct kvm_vcpu *vcpu) |
865 | { | |
866 | int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; | |
867 | int reg3 = vcpu->arch.sie_block->ipa & 0x000f; | |
fc56eb66 HC |
868 | int reg, rc, nr_regs; |
869 | u64 ctl_array[16]; | |
870 | u64 ga; | |
8ae04b8f | 871 | ar_t ar; |
953ed88d TH |
872 | |
873 | vcpu->stat.instruction_lctlg++; | |
874 | ||
875 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
876 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
877 | ||
8ae04b8f | 878 | ga = kvm_s390_get_base_disp_rsy(vcpu, &ar); |
953ed88d | 879 | |
f987a3ee | 880 | if (ga & 7) |
953ed88d TH |
881 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); |
882 | ||
f987a3ee HC |
883 | VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga); |
884 | trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga); | |
953ed88d | 885 | |
fc56eb66 | 886 | nr_regs = ((reg3 - reg1) & 0xf) + 1; |
8ae04b8f | 887 | rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64)); |
fc56eb66 HC |
888 | if (rc) |
889 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
890 | reg = reg1; | |
891 | nr_regs = 0; | |
953ed88d | 892 | do { |
fc56eb66 | 893 | vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++]; |
953ed88d TH |
894 | if (reg == reg3) |
895 | break; | |
896 | reg = (reg + 1) % 16; | |
897 | } while (1); | |
2dca485f | 898 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
953ed88d TH |
899 | return 0; |
900 | } | |
901 | ||
aba07508 DH |
902 | static int handle_stctg(struct kvm_vcpu *vcpu) |
903 | { | |
904 | int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; | |
905 | int reg3 = vcpu->arch.sie_block->ipa & 0x000f; | |
fc56eb66 HC |
906 | int reg, rc, nr_regs; |
907 | u64 ctl_array[16]; | |
908 | u64 ga; | |
8ae04b8f | 909 | ar_t ar; |
aba07508 DH |
910 | |
911 | vcpu->stat.instruction_stctg++; | |
912 | ||
913 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
914 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
915 | ||
8ae04b8f | 916 | ga = kvm_s390_get_base_disp_rsy(vcpu, &ar); |
aba07508 DH |
917 | |
918 | if (ga & 7) | |
919 | return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); | |
920 | ||
aba07508 DH |
921 | VCPU_EVENT(vcpu, 5, "stctg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga); |
922 | trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga); | |
923 | ||
fc56eb66 HC |
924 | reg = reg1; |
925 | nr_regs = 0; | |
aba07508 | 926 | do { |
fc56eb66 | 927 | ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg]; |
aba07508 DH |
928 | if (reg == reg3) |
929 | break; | |
930 | reg = (reg + 1) % 16; | |
931 | } while (1); | |
8ae04b8f | 932 | rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64)); |
fc56eb66 | 933 | return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0; |
aba07508 DH |
934 | } |
935 | ||
f379aae5 | 936 | static const intercept_handler_t eb_handlers[256] = { |
953ed88d | 937 | [0x2f] = handle_lctlg, |
aba07508 | 938 | [0x25] = handle_stctg, |
f379aae5 CH |
939 | }; |
940 | ||
953ed88d | 941 | int kvm_s390_handle_eb(struct kvm_vcpu *vcpu) |
f379aae5 CH |
942 | { |
943 | intercept_handler_t handler; | |
944 | ||
f379aae5 CH |
945 | handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff]; |
946 | if (handler) | |
947 | return handler(vcpu); | |
948 | return -EOPNOTSUPP; | |
949 | } | |
950 | ||
bb25b9ba CB |
951 | static int handle_tprot(struct kvm_vcpu *vcpu) |
952 | { | |
b1c571a5 | 953 | u64 address1, address2; |
a0465f9a TH |
954 | unsigned long hva, gpa; |
955 | int ret = 0, cc = 0; | |
956 | bool writable; | |
8ae04b8f | 957 | ar_t ar; |
bb25b9ba CB |
958 | |
959 | vcpu->stat.instruction_tprot++; | |
960 | ||
f9f6bbc6 TH |
961 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) |
962 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); | |
963 | ||
8ae04b8f | 964 | kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL); |
b1c571a5 | 965 | |
bb25b9ba CB |
966 | /* we only handle the Linux memory detection case: |
967 | * access key == 0 | |
bb25b9ba CB |
968 | * everything else goes to userspace. */ |
969 | if (address2 & 0xf0) | |
970 | return -EOPNOTSUPP; | |
971 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT) | |
a0465f9a | 972 | ipte_lock(vcpu); |
8ae04b8f | 973 | ret = guest_translate_address(vcpu, address1, ar, &gpa, 1); |
a0465f9a TH |
974 | if (ret == PGM_PROTECTION) { |
975 | /* Write protected? Try again with read-only... */ | |
976 | cc = 1; | |
8ae04b8f | 977 | ret = guest_translate_address(vcpu, address1, ar, &gpa, 0); |
a0465f9a TH |
978 | } |
979 | if (ret) { | |
980 | if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) { | |
981 | ret = kvm_s390_inject_program_int(vcpu, ret); | |
982 | } else if (ret > 0) { | |
983 | /* Translation not available */ | |
984 | kvm_s390_set_psw_cc(vcpu, 3); | |
985 | ret = 0; | |
986 | } | |
987 | goto out_unlock; | |
988 | } | |
59a1fa2d | 989 | |
a0465f9a TH |
990 | hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable); |
991 | if (kvm_is_error_hva(hva)) { | |
992 | ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
993 | } else { | |
994 | if (!writable) | |
995 | cc = 1; /* Write not permitted ==> read-only */ | |
996 | kvm_s390_set_psw_cc(vcpu, cc); | |
997 | /* Note: CC2 only occurs for storage keys (not supported yet) */ | |
998 | } | |
999 | out_unlock: | |
1000 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT) | |
1001 | ipte_unlock(vcpu); | |
1002 | return ret; | |
bb25b9ba CB |
1003 | } |
1004 | ||
1005 | int kvm_s390_handle_e5(struct kvm_vcpu *vcpu) | |
1006 | { | |
1007 | /* For e5xx... instructions we only handle TPROT */ | |
1008 | if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01) | |
1009 | return handle_tprot(vcpu); | |
1010 | return -EOPNOTSUPP; | |
1011 | } | |
1012 | ||
8c3f61e2 CH |
1013 | static int handle_sckpf(struct kvm_vcpu *vcpu) |
1014 | { | |
1015 | u32 value; | |
1016 | ||
1017 | if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) | |
208dd756 | 1018 | return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); |
8c3f61e2 CH |
1019 | |
1020 | if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000) | |
1021 | return kvm_s390_inject_program_int(vcpu, | |
1022 | PGM_SPECIFICATION); | |
1023 | ||
1024 | value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff; | |
1025 | vcpu->arch.sie_block->todpr = value; | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
77975357 | 1030 | static const intercept_handler_t x01_handlers[256] = { |
8c3f61e2 CH |
1031 | [0x07] = handle_sckpf, |
1032 | }; | |
1033 | ||
1034 | int kvm_s390_handle_01(struct kvm_vcpu *vcpu) | |
1035 | { | |
1036 | intercept_handler_t handler; | |
1037 | ||
1038 | handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; | |
1039 | if (handler) | |
1040 | return handler(vcpu); | |
1041 | return -EOPNOTSUPP; | |
1042 | } |