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Merge tag 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux...
[deliverable/linux.git] / arch / s390 / kvm / priv.c
CommitLineData
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 */
34static int handle_set_clock(struct kvm_vcpu *vcpu)
35{
36 struct kvm_vcpu *cpup;
37 s64 hostclk, val;
0e7a3f94 38 int i, rc;
6a3f95a6 39 u64 op2;
6a3f95a6
TH		 40
41 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
42 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
43
44 op2 = kvm_s390_get_base_disp_s(vcpu);
45 if (op2 & 7) /* Operand must be on a doubleword boundary */
46 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
0e7a3f94
HC		 47 rc = read_guest(vcpu, op2, &val, sizeof(val));
48 if (rc)
49 return kvm_s390_inject_prog_cond(vcpu, rc);
6a3f95a6
TH		 50
51 if (store_tod_clock(&hostclk)) {
52 kvm_s390_set_psw_cc(vcpu, 3);
53 return 0;
54 }
55 val = (val - hostclk) & ~0x3fUL;
56
57 mutex_lock(&vcpu->kvm->lock);
58 kvm_for_each_vcpu(i, cpup, vcpu->kvm)
59 cpup->arch.sie_block->epoch = val;
60 mutex_unlock(&vcpu->kvm->lock);
61
62 kvm_s390_set_psw_cc(vcpu, 0);
63 return 0;
64}
65
453423dc
CB		 66static int handle_set_prefix(struct kvm_vcpu *vcpu)
67{
453423dc 68 u64 operand2;
665170cb
HC		 69 u32 address;
70 int rc;
453423dc
CB		 71
72 vcpu->stat.instruction_spx++;
73
5087dfa6
TH		 74 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
75 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
76
b1c571a5 77 operand2 = kvm_s390_get_base_disp_s(vcpu);
453423dc
CB		 78
79 /* must be word boundary */
db4a29cb
HC		 80 if (operand2 & 3)
81 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc
CB		 82
83 /* get the value */
665170cb
HC		 84 rc = read_guest(vcpu, operand2, &address, sizeof(address));
85 if (rc)
86 return kvm_s390_inject_prog_cond(vcpu, rc);
87
88 address &= 0x7fffe000u;
89
90 /*
91 * Make sure the new value is valid memory. We only need to check the
92 * first page, since address is 8k aligned and memory pieces are always
93 * at least 1MB aligned and have at least a size of 1MB.
94 */
95 if (kvm_is_error_gpa(vcpu->kvm, address))
db4a29cb 96 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
453423dc 97
8d26cf7b 98 kvm_s390_set_prefix(vcpu, address);
453423dc
CB		 99
100 VCPU_EVENT(vcpu, 5, "setting prefix to %x", address);
5786fffa 101 trace_kvm_s390_handle_prefix(vcpu, 1, address);
453423dc
CB		 102 return 0;
103}
104
105static int handle_store_prefix(struct kvm_vcpu *vcpu)
106{
453423dc
CB		 107 u64 operand2;
108 u32 address;
f748f4a7 109 int rc;
453423dc
CB		 110
111 vcpu->stat.instruction_stpx++;
b1c571a5 112
5087dfa6
TH		 113 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
114 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
115
b1c571a5 116 operand2 = kvm_s390_get_base_disp_s(vcpu);
453423dc
CB		 117
118 /* must be word boundary */
db4a29cb
HC		 119 if (operand2 & 3)
120 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 121
fda902cb 122 address = kvm_s390_get_prefix(vcpu);
453423dc
CB		 123
124 /* get the value */
f748f4a7
HC		 125 rc = write_guest(vcpu, operand2, &address, sizeof(address));
126 if (rc)
127 return kvm_s390_inject_prog_cond(vcpu, rc);
453423dc
CB		 128
129 VCPU_EVENT(vcpu, 5, "storing prefix to %x", address);
5786fffa 130 trace_kvm_s390_handle_prefix(vcpu, 0, address);
453423dc
CB		 131 return 0;
132}
133
134static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
135{
8b96de0e
HC		 136 u16 vcpu_id = vcpu->vcpu_id;
137 u64 ga;
138 int rc;
453423dc
CB		 139
140 vcpu->stat.instruction_stap++;
b1c571a5 141
5087dfa6
TH		 142 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
143 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
144
8b96de0e 145 ga = kvm_s390_get_base_disp_s(vcpu);
453423dc 146
8b96de0e 147 if (ga & 1)
db4a29cb 148 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 149
8b96de0e
HC		 150 rc = write_guest(vcpu, ga, &vcpu_id, sizeof(vcpu_id));
151 if (rc)
152 return kvm_s390_inject_prog_cond(vcpu, rc);
453423dc 153
8b96de0e
HC		 154 VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", ga);
155 trace_kvm_s390_handle_stap(vcpu, ga);
453423dc
CB		 156 return 0;
157}
158
3ac8e380 159static int __skey_check_enable(struct kvm_vcpu *vcpu)
693ffc08 160{
3ac8e380 161 int rc = 0;
693ffc08 162 if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)))
3ac8e380 163 return rc;
693ffc08 164
3ac8e380 165 rc = s390_enable_skey();
693ffc08
DD		 166 trace_kvm_s390_skey_related_inst(vcpu);
167 vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
3ac8e380 168 return rc;
693ffc08
DD		 169}
170
171
453423dc
CB		 172static int handle_skey(struct kvm_vcpu *vcpu)
173{
3ac8e380 174 int rc = __skey_check_enable(vcpu);
693ffc08 175
3ac8e380
DD		 176 if (rc)
177 return rc;
453423dc 178 vcpu->stat.instruction_storage_key++;
5087dfa6
TH		 179
180 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
181 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
182
04b41acd 183 kvm_s390_rewind_psw(vcpu, 4);
453423dc
CB		 184 VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
185 return 0;
186}
187
8a242234
HC		 188static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
189{
8a242234 190 vcpu->stat.instruction_ipte_interlock++;
04b41acd 191 if (psw_bits(vcpu->arch.sie_block->gpsw).p)
8a242234
HC		 192 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
193 wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
04b41acd 194 kvm_s390_rewind_psw(vcpu, 4);
8a242234
HC		 195 VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
196 return 0;
197}
198
aca84241
TH		 199static int handle_test_block(struct kvm_vcpu *vcpu)
200{
aca84241
TH		 201 gpa_t addr;
202 int reg2;
203
204 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
205 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
206
207 kvm_s390_get_regs_rre(vcpu, NULL, &reg2);
208 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
e45efa28
TH		 209 addr = kvm_s390_logical_to_effective(vcpu, addr);
210 if (kvm_s390_check_low_addr_protection(vcpu, addr))
211 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
aca84241
TH		 212 addr = kvm_s390_real_to_abs(vcpu, addr);
213
ef23e779 214 if (kvm_is_error_gpa(vcpu->kvm, addr))
aca84241
TH		 215 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
216 /*
217 * We don't expect errors on modern systems, and do not care
218 * about storage keys (yet), so let's just clear the page.
219 */
ef23e779 220 if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
aca84241
TH		 221 return -EFAULT;
222 kvm_s390_set_psw_cc(vcpu, 0);
223 vcpu->run->s.regs.gprs[0] = 0;
224 return 0;
225}
226
fa6b7fe9 227static int handle_tpi(struct kvm_vcpu *vcpu)
453423dc 228{
fa6b7fe9 229 struct kvm_s390_interrupt_info *inti;
4799b557
HC		 230 unsigned long len;
231 u32 tpi_data[3];
232 int cc, rc;
7c959e82 233 u64 addr;
fa6b7fe9 234
4799b557 235 rc = 0;
fa6b7fe9 236 addr = kvm_s390_get_base_disp_s(vcpu);
db4a29cb
HC		 237 if (addr & 3)
238 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
7c959e82 239 cc = 0;
f092669e 240 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0);
7c959e82
HC		 241 if (!inti)
242 goto no_interrupt;
243 cc = 1;
4799b557
HC		 244 tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
245 tpi_data[1] = inti->io.io_int_parm;
246 tpi_data[2] = inti->io.io_int_word;
7c959e82
HC		 247 if (addr) {
248 /*
249 * Store the two-word I/O interruption code into the
250 * provided area.
251 */
4799b557
HC		 252 len = sizeof(tpi_data) - 4;
253 rc = write_guest(vcpu, addr, &tpi_data, len);
254 if (rc)
255 return kvm_s390_inject_prog_cond(vcpu, rc);
7c959e82
HC		 256 } else {
257 /*
258 * Store the three-word I/O interruption code into
259 * the appropriate lowcore area.
260 */
4799b557
HC		 261 len = sizeof(tpi_data);
262 if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len))
263 rc = -EFAULT;
7c959e82 264 }
2f32d4ea
CH		 265 /*
266 * If we encounter a problem storing the interruption code, the
267 * instruction is suppressed from the guest's view: reinject the
268 * interrupt.
269 */
270 if (!rc)
271 kfree(inti);
272 else
273 kvm_s390_reinject_io_int(vcpu->kvm, inti);
7c959e82 274no_interrupt:
fa6b7fe9 275 /* Set condition code and we're done. */
4799b557
HC		 276 if (!rc)
277 kvm_s390_set_psw_cc(vcpu, cc);
278 return rc ? -EFAULT : 0;
453423dc
CB		 279}
280
fa6b7fe9
CH		 281static int handle_tsch(struct kvm_vcpu *vcpu)
282{
283 struct kvm_s390_interrupt_info *inti;
284
285 inti = kvm_s390_get_io_int(vcpu->kvm, 0,
286 vcpu->run->s.regs.gprs[1]);
287
288 /*
289 * Prepare exit to userspace.
290 * We indicate whether we dequeued a pending I/O interrupt
291 * so that userspace can re-inject it if the instruction gets
292 * a program check. While this may re-order the pending I/O
293 * interrupts, this is no problem since the priority is kept
294 * intact.
295 */
296 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
297 vcpu->run->s390_tsch.dequeued = !!inti;
298 if (inti) {
299 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
300 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
301 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
302 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
303 }
304 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
305 kfree(inti);
306 return -EREMOTE;
307}
308
309static int handle_io_inst(struct kvm_vcpu *vcpu)
310{
311 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
312
5087dfa6
TH		 313 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
314 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
315
fa6b7fe9
CH		 316 if (vcpu->kvm->arch.css_support) {
317 /*
318 * Most I/O instructions will be handled by userspace.
319 * Exceptions are tpi and the interrupt portion of tsch.
320 */
321 if (vcpu->arch.sie_block->ipa == 0xb236)
322 return handle_tpi(vcpu);
323 if (vcpu->arch.sie_block->ipa == 0xb235)
324 return handle_tsch(vcpu);
325 /* Handle in userspace. */
326 return -EOPNOTSUPP;
327 } else {
328 /*
b4a96015 329 * Set condition code 3 to stop the guest from issuing channel
fa6b7fe9
CH		 330 * I/O instructions.
331 */
ea828ebf 332 kvm_s390_set_psw_cc(vcpu, 3);
fa6b7fe9
CH		 333 return 0;
334 }
335}
336
453423dc
CB		 337static int handle_stfl(struct kvm_vcpu *vcpu)
338{
453423dc 339 int rc;
9d8d5786 340 unsigned int fac;
453423dc
CB		 341
342 vcpu->stat.instruction_stfl++;
5087dfa6
TH		 343
344 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
345 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
346
9d8d5786
MM		 347 /*
348 * We need to shift the lower 32 facility bits (bit 0-31) from a u64
349 * into a u32 memory representation. They will remain bits 0-31.
350 */
981467c9 351 fac = *vcpu->kvm->arch.model.fac->list >> 32;
0f9701c6 352 rc = write_guest_lc(vcpu, offsetof(struct _lowcore, stfl_fac_list),
9d8d5786 353 &fac, sizeof(fac));
dc5008b9 354 if (rc)
0f9701c6 355 return rc;
9d8d5786
MM		 356 VCPU_EVENT(vcpu, 5, "store facility list value %x", fac);
357 trace_kvm_s390_handle_stfl(vcpu, fac);
453423dc
CB		 358 return 0;
359}
360
48a3e950
CH		 361#define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
362#define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
d21683ea 363#define PSW_ADDR_24 0x0000000000ffffffUL
48a3e950
CH		 364#define PSW_ADDR_31 0x000000007fffffffUL
365
a3fb577e
TH		 366int is_valid_psw(psw_t *psw)
367{
3736b874
HC		 368 if (psw->mask & PSW_MASK_UNASSIGNED)
369 return 0;
370 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
371 if (psw->addr & ~PSW_ADDR_31)
372 return 0;
373 }
374 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
375 return 0;
376 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
377 return 0;
a3fb577e
TH		 378 if (psw->addr & 1)
379 return 0;
3736b874
HC		 380 return 1;
381}
382
48a3e950
CH		 383int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
384{
3736b874 385 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
48a3e950 386 psw_compat_t new_psw;
3736b874 387 u64 addr;
2d8bcaed 388 int rc;
48a3e950 389
3736b874 390 if (gpsw->mask & PSW_MASK_PSTATE)
208dd756
TH		 391 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
392
48a3e950 393 addr = kvm_s390_get_base_disp_s(vcpu);
6fd0fcc9
HC		 394 if (addr & 7)
395 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
2d8bcaed
HC		 396
397 rc = read_guest(vcpu, addr, &new_psw, sizeof(new_psw));
398 if (rc)
399 return kvm_s390_inject_prog_cond(vcpu, rc);
6fd0fcc9
HC		 400 if (!(new_psw.mask & PSW32_MASK_BASE))
401 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
3736b874
HC		 402 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
403 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
404 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
405 if (!is_valid_psw(gpsw))
6fd0fcc9 406 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
48a3e950
CH		 407 return 0;
408}
409
410static int handle_lpswe(struct kvm_vcpu *vcpu)
411{
48a3e950 412 psw_t new_psw;
3736b874 413 u64 addr;
2d8bcaed 414 int rc;
48a3e950 415
5087dfa6
TH		 416 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
417 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
418
48a3e950 419 addr = kvm_s390_get_base_disp_s(vcpu);
6fd0fcc9
HC		 420 if (addr & 7)
421 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
2d8bcaed
HC		 422 rc = read_guest(vcpu, addr, &new_psw, sizeof(new_psw));
423 if (rc)
424 return kvm_s390_inject_prog_cond(vcpu, rc);
3736b874
HC		 425 vcpu->arch.sie_block->gpsw = new_psw;
426 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
6fd0fcc9 427 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
48a3e950
CH		 428 return 0;
429}
430
453423dc
CB		 431static int handle_stidp(struct kvm_vcpu *vcpu)
432{
7d777d78 433 u64 stidp_data = vcpu->arch.stidp_data;
453423dc 434 u64 operand2;
7d777d78 435 int rc;
453423dc
CB		 436
437 vcpu->stat.instruction_stidp++;
b1c571a5 438
5087dfa6
TH		 439 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
440 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
441
b1c571a5 442 operand2 = kvm_s390_get_base_disp_s(vcpu);
453423dc 443
db4a29cb
HC		 444 if (operand2 & 7)
445 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
453423dc 446
7d777d78
HC		 447 rc = write_guest(vcpu, operand2, &stidp_data, sizeof(stidp_data));
448 if (rc)
449 return kvm_s390_inject_prog_cond(vcpu, rc);
453423dc
CB		 450
451 VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
453423dc
CB		 452 return 0;
453}
454
455static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
456{
453423dc
CB		 457 int cpus = 0;
458 int n;
459
ff520a63 460 cpus = atomic_read(&vcpu->kvm->online_vcpus);
453423dc
CB		 461
462 /* deal with other level 3 hypervisors */
caf757c6 463 if (stsi(mem, 3, 2, 2))
453423dc
CB		 464 mem->count = 0;
465 if (mem->count < 8)
466 mem->count++;
467 for (n = mem->count - 1; n > 0 ; n--)
468 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
469
470 mem->vm[0].cpus_total = cpus;
471 mem->vm[0].cpus_configured = cpus;
472 mem->vm[0].cpus_standby = 0;
473 mem->vm[0].cpus_reserved = 0;
474 mem->vm[0].caf = 1000;
475 memcpy(mem->vm[0].name, "KVMguest", 8);
476 ASCEBC(mem->vm[0].name, 8);
477 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
478 ASCEBC(mem->vm[0].cpi, 16);
479}
480
481static int handle_stsi(struct kvm_vcpu *vcpu)
482{
5a32c1af
CB		 483 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
484 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
485 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
c51f068c 486 unsigned long mem = 0;
453423dc 487 u64 operand2;
db4a29cb 488 int rc = 0;
453423dc
CB		 489
490 vcpu->stat.instruction_stsi++;
491 VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
492
5087dfa6
TH		 493 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
494 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
495
87d41fb4 496 if (fc > 3) {
ea828ebf 497 kvm_s390_set_psw_cc(vcpu, 3);
87d41fb4
TH		 498 return 0;
499 }
453423dc 500
87d41fb4
TH		 501 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
502 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
453423dc
CB		 503 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
504
87d41fb4 505 if (fc == 0) {
5a32c1af 506 vcpu->run->s.regs.gprs[0] = 3 << 28;
ea828ebf 507 kvm_s390_set_psw_cc(vcpu, 0);
453423dc 508 return 0;
87d41fb4
TH		 509 }
510
511 operand2 = kvm_s390_get_base_disp_s(vcpu);
512
513 if (operand2 & 0xfff)
514 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
515
516 switch (fc) {
453423dc
CB		 517 case 1: /* same handling for 1 and 2 */
518 case 2:
519 mem = get_zeroed_page(GFP_KERNEL);
520 if (!mem)
c51f068c 521 goto out_no_data;
caf757c6 522 if (stsi((void *) mem, fc, sel1, sel2))
c51f068c 523 goto out_no_data;
453423dc
CB		 524 break;
525 case 3:
526 if (sel1 != 2 || sel2 != 2)
c51f068c 527 goto out_no_data;
453423dc
CB		 528 mem = get_zeroed_page(GFP_KERNEL);
529 if (!mem)
c51f068c 530 goto out_no_data;
453423dc
CB		 531 handle_stsi_3_2_2(vcpu, (void *) mem);
532 break;
453423dc
CB		 533 }
534
645c5bc1
HC		 535 rc = write_guest(vcpu, operand2, (void *)mem, PAGE_SIZE);
536 if (rc) {
537 rc = kvm_s390_inject_prog_cond(vcpu, rc);
538 goto out;
453423dc 539 }
5786fffa 540 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
453423dc 541 free_page(mem);
ea828ebf 542 kvm_s390_set_psw_cc(vcpu, 0);
5a32c1af 543 vcpu->run->s.regs.gprs[0] = 0;
453423dc 544 return 0;
c51f068c 545out_no_data:
ea828ebf 546 kvm_s390_set_psw_cc(vcpu, 3);
645c5bc1 547out:
c51f068c 548 free_page(mem);
db4a29cb 549 return rc;
453423dc
CB		 550}
551
f379aae5 552static const intercept_handler_t b2_handlers[256] = {
453423dc 553 [0x02] = handle_stidp,
6a3f95a6 554 [0x04] = handle_set_clock,
453423dc
CB		 555 [0x10] = handle_set_prefix,
556 [0x11] = handle_store_prefix,
557 [0x12] = handle_store_cpu_address,
8a242234 558 [0x21] = handle_ipte_interlock,
453423dc
CB		 559 [0x29] = handle_skey,
560 [0x2a] = handle_skey,
561 [0x2b] = handle_skey,
aca84241 562 [0x2c] = handle_test_block,
f379aae5
CH		 563 [0x30] = handle_io_inst,
564 [0x31] = handle_io_inst,
565 [0x32] = handle_io_inst,
566 [0x33] = handle_io_inst,
567 [0x34] = handle_io_inst,
568 [0x35] = handle_io_inst,
569 [0x36] = handle_io_inst,
570 [0x37] = handle_io_inst,
571 [0x38] = handle_io_inst,
572 [0x39] = handle_io_inst,
573 [0x3a] = handle_io_inst,
574 [0x3b] = handle_io_inst,
575 [0x3c] = handle_io_inst,
8a242234 576 [0x50] = handle_ipte_interlock,
f379aae5
CH		 577 [0x5f] = handle_io_inst,
578 [0x74] = handle_io_inst,
579 [0x76] = handle_io_inst,
453423dc
CB		 580 [0x7d] = handle_stsi,
581 [0xb1] = handle_stfl,
48a3e950 582 [0xb2] = handle_lpswe,
453423dc
CB		 583};
584
70455a36 585int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
453423dc
CB		 586{
587 intercept_handler_t handler;
588
70455a36 589 /*
5087dfa6
TH		 590 * A lot of B2 instructions are priviledged. Here we check for
591 * the privileged ones, that we can handle in the kernel.
592 * Anything else goes to userspace.
593 */
f379aae5 594 handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
5087dfa6
TH		 595 if (handler)
596 return handler(vcpu);
597
b8e660b8 598 return -EOPNOTSUPP;
453423dc 599}
bb25b9ba 600
48a3e950
CH		 601static int handle_epsw(struct kvm_vcpu *vcpu)
602{
603 int reg1, reg2;
604
aeb87c3c 605 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
48a3e950
CH		 606
607 /* This basically extracts the mask half of the psw. */
843200e7 608 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
48a3e950
CH		 609 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
610 if (reg2) {
843200e7 611 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
48a3e950 612 vcpu->run->s.regs.gprs[reg2] |=
843200e7 613 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
48a3e950
CH		 614 }
615 return 0;
616}
617
69d0d3a3
CB		 618#define PFMF_RESERVED 0xfffc0101UL
619#define PFMF_SK 0x00020000UL
620#define PFMF_CF 0x00010000UL
621#define PFMF_UI 0x00008000UL
622#define PFMF_FSC 0x00007000UL
623#define PFMF_NQ 0x00000800UL
624#define PFMF_MR 0x00000400UL
625#define PFMF_MC 0x00000200UL
626#define PFMF_KEY 0x000000feUL
627
628static int handle_pfmf(struct kvm_vcpu *vcpu)
629{
630 int reg1, reg2;
631 unsigned long start, end;
632
633 vcpu->stat.instruction_pfmf++;
634
635 kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
636
637 if (!MACHINE_HAS_PFMF)
638 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
639
640 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
208dd756 641 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
69d0d3a3
CB		 642
643 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
644 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
645
646 /* Only provide non-quiescing support if the host supports it */
e769ece3 647 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && !test_facility(14))
69d0d3a3
CB		 648 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
649
650 /* No support for conditional-SSKE */
651 if (vcpu->run->s.regs.gprs[reg1] & (PFMF_MR | PFMF_MC))
652 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
653
654 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
a02689fe 655 start = kvm_s390_logical_to_effective(vcpu, start);
fb34c603 656
69d0d3a3
CB		 657 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
658 case 0x00000000:
659 end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
660 break;
661 case 0x00001000:
662 end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
663 break;
664 /* We dont support EDAT2
665 case 0x00002000:
666 end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
667 break;*/
668 default:
669 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
670 }
a02689fe
TH		 671
672 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
673 if (kvm_s390_check_low_addr_protection(vcpu, start))
674 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
675 }
676
69d0d3a3 677 while (start < end) {
fb34c603
TH		 678 unsigned long useraddr, abs_addr;
679
680 /* Translate guest address to host address */
681 if ((vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) == 0)
682 abs_addr = kvm_s390_real_to_abs(vcpu, start);
683 else
684 abs_addr = start;
685 useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(abs_addr));
686 if (kvm_is_error_hva(useraddr))
69d0d3a3
CB		 687 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
688
689 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
690 if (clear_user((void __user *)useraddr, PAGE_SIZE))
691 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
692 }
693
694 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
3ac8e380
DD		 695 int rc = __skey_check_enable(vcpu);
696
697 if (rc)
698 return rc;
69d0d3a3
CB		 699 if (set_guest_storage_key(current->mm, useraddr,
700 vcpu->run->s.regs.gprs[reg1] & PFMF_KEY,
701 vcpu->run->s.regs.gprs[reg1] & PFMF_NQ))
702 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
703 }
704
705 start += PAGE_SIZE;
706 }
707 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC)
708 vcpu->run->s.regs.gprs[reg2] = end;
709 return 0;
710}
711
b31288fa
KW		 712static int handle_essa(struct kvm_vcpu *vcpu)
713{
714 /* entries expected to be 1FF */
715 int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
716 unsigned long *cbrlo, cbrle;
717 struct gmap *gmap;
718 int i;
719
720 VCPU_EVENT(vcpu, 5, "cmma release %d pages", entries);
721 gmap = vcpu->arch.gmap;
722 vcpu->stat.instruction_essa++;
b31605c1 723 if (!kvm_s390_cmma_enabled(vcpu->kvm))
b31288fa
KW		 724 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
725
726 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
727 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
728
729 if (((vcpu->arch.sie_block->ipb & 0xf0000000) >> 28) > 6)
730 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
731
732 /* Rewind PSW to repeat the ESSA instruction */
04b41acd 733 kvm_s390_rewind_psw(vcpu, 4);
b31288fa
KW		 734 vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
735 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
736 down_read(&gmap->mm->mmap_sem);
737 for (i = 0; i < entries; ++i) {
738 cbrle = cbrlo[i];
739 if (unlikely(cbrle & ~PAGE_MASK || cbrle < 2 * PAGE_SIZE))
740 /* invalid entry */
741 break;
742 /* try to free backing */
6e0a0431 743 __gmap_zap(gmap, cbrle);
b31288fa
KW		 744 }
745 up_read(&gmap->mm->mmap_sem);
746 if (i < entries)
747 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
748 return 0;
749}
750
48a3e950 751static const intercept_handler_t b9_handlers[256] = {
8a242234 752 [0x8a] = handle_ipte_interlock,
48a3e950 753 [0x8d] = handle_epsw,
8a242234
HC		 754 [0x8e] = handle_ipte_interlock,
755 [0x8f] = handle_ipte_interlock,
b31288fa 756 [0xab] = handle_essa,
69d0d3a3 757 [0xaf] = handle_pfmf,
48a3e950
CH		 758};
759
760int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
761{
762 intercept_handler_t handler;
763
764 /* This is handled just as for the B2 instructions. */
765 handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
5087dfa6
TH		 766 if (handler)
767 return handler(vcpu);
768
48a3e950
CH		 769 return -EOPNOTSUPP;
770}
771
953ed88d
TH		 772int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
773{
774 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
775 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
fc56eb66
HC		 776 int reg, rc, nr_regs;
777 u32 ctl_array[16];
f987a3ee 778 u64 ga;
953ed88d
TH		 779
780 vcpu->stat.instruction_lctl++;
781
782 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
783 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
784
f987a3ee 785 ga = kvm_s390_get_base_disp_rs(vcpu);
953ed88d 786
f987a3ee 787 if (ga & 3)
953ed88d
TH		 788 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
789
f987a3ee
HC		 790 VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
791 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
953ed88d 792
fc56eb66
HC		 793 nr_regs = ((reg3 - reg1) & 0xf) + 1;
794 rc = read_guest(vcpu, ga, ctl_array, nr_regs * sizeof(u32));
795 if (rc)
796 return kvm_s390_inject_prog_cond(vcpu, rc);
953ed88d 797 reg = reg1;
fc56eb66 798 nr_regs = 0;
953ed88d 799 do {
953ed88d 800 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
fc56eb66 801 vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
953ed88d
TH		 802 if (reg == reg3)
803 break;
804 reg = (reg + 1) % 16;
805 } while (1);
2dca485f 806 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
953ed88d
TH		 807 return 0;
808}
809
aba07508
DH		 810int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
811{
812 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
813 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
fc56eb66
HC		 814 int reg, rc, nr_regs;
815 u32 ctl_array[16];
aba07508 816 u64 ga;
aba07508
DH		 817
818 vcpu->stat.instruction_stctl++;
819
820 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
821 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
822
823 ga = kvm_s390_get_base_disp_rs(vcpu);
824
825 if (ga & 3)
826 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
827
828 VCPU_EVENT(vcpu, 5, "stctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
829 trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
830
831 reg = reg1;
fc56eb66 832 nr_regs = 0;
aba07508 833 do {
fc56eb66 834 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
aba07508
DH		 835 if (reg == reg3)
836 break;
837 reg = (reg + 1) % 16;
838 } while (1);
fc56eb66
HC		 839 rc = write_guest(vcpu, ga, ctl_array, nr_regs * sizeof(u32));
840 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
aba07508
DH		 841}
842
953ed88d
TH		 843static int handle_lctlg(struct kvm_vcpu *vcpu)
844{
845 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
846 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
fc56eb66
HC		 847 int reg, rc, nr_regs;
848 u64 ctl_array[16];
849 u64 ga;
953ed88d
TH		 850
851 vcpu->stat.instruction_lctlg++;
852
853 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
854 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
855
f987a3ee 856 ga = kvm_s390_get_base_disp_rsy(vcpu);
953ed88d 857
f987a3ee 858 if (ga & 7)
953ed88d
TH		 859 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
860
f987a3ee
HC		 861 VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
862 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
953ed88d 863
fc56eb66
HC		 864 nr_regs = ((reg3 - reg1) & 0xf) + 1;
865 rc = read_guest(vcpu, ga, ctl_array, nr_regs * sizeof(u64));
866 if (rc)
867 return kvm_s390_inject_prog_cond(vcpu, rc);
868 reg = reg1;
869 nr_regs = 0;
953ed88d 870 do {
fc56eb66 871 vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
953ed88d
TH		 872 if (reg == reg3)
873 break;
874 reg = (reg + 1) % 16;
875 } while (1);
2dca485f 876 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
953ed88d
TH		 877 return 0;
878}
879
aba07508
DH		 880static int handle_stctg(struct kvm_vcpu *vcpu)
881{
882 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
883 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
fc56eb66
HC		 884 int reg, rc, nr_regs;
885 u64 ctl_array[16];
886 u64 ga;
aba07508
DH		 887
888 vcpu->stat.instruction_stctg++;
889
890 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
891 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
892
893 ga = kvm_s390_get_base_disp_rsy(vcpu);
894
895 if (ga & 7)
896 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
897
aba07508
DH		 898 VCPU_EVENT(vcpu, 5, "stctg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
899 trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
900
fc56eb66
HC		 901 reg = reg1;
902 nr_regs = 0;
aba07508 903 do {
fc56eb66 904 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
aba07508
DH		 905 if (reg == reg3)
906 break;
907 reg = (reg + 1) % 16;
908 } while (1);
fc56eb66
HC		 909 rc = write_guest(vcpu, ga, ctl_array, nr_regs * sizeof(u64));
910 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
aba07508
DH		 911}
912
f379aae5 913static const intercept_handler_t eb_handlers[256] = {
953ed88d 914 [0x2f] = handle_lctlg,
aba07508 915 [0x25] = handle_stctg,
f379aae5
CH		 916};
917
953ed88d 918int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
f379aae5
CH		 919{
920 intercept_handler_t handler;
921
f379aae5
CH		 922 handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
923 if (handler)
924 return handler(vcpu);
925 return -EOPNOTSUPP;
926}
927
bb25b9ba
CB		 928static int handle_tprot(struct kvm_vcpu *vcpu)
929{
b1c571a5 930 u64 address1, address2;
a0465f9a
TH		 931 unsigned long hva, gpa;
932 int ret = 0, cc = 0;
933 bool writable;
bb25b9ba
CB		 934
935 vcpu->stat.instruction_tprot++;
936
f9f6bbc6
TH		 937 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
938 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
939
b1c571a5
CH		 940 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
941
bb25b9ba
CB		 942 /* we only handle the Linux memory detection case:
943 * access key == 0
bb25b9ba
CB		 944 * everything else goes to userspace. */
945 if (address2 & 0xf0)
946 return -EOPNOTSUPP;
947 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
a0465f9a
TH		 948 ipte_lock(vcpu);
949 ret = guest_translate_address(vcpu, address1, &gpa, 1);
950 if (ret == PGM_PROTECTION) {
951 /* Write protected? Try again with read-only... */
952 cc = 1;
953 ret = guest_translate_address(vcpu, address1, &gpa, 0);
954 }
955 if (ret) {
956 if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
957 ret = kvm_s390_inject_program_int(vcpu, ret);
958 } else if (ret > 0) {
959 /* Translation not available */
960 kvm_s390_set_psw_cc(vcpu, 3);
961 ret = 0;
962 }
963 goto out_unlock;
964 }
59a1fa2d 965
a0465f9a
TH		 966 hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
967 if (kvm_is_error_hva(hva)) {
968 ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
969 } else {
970 if (!writable)
971 cc = 1; /* Write not permitted ==> read-only */
972 kvm_s390_set_psw_cc(vcpu, cc);
973 /* Note: CC2 only occurs for storage keys (not supported yet) */
974 }
975out_unlock:
976 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
977 ipte_unlock(vcpu);
978 return ret;
bb25b9ba
CB		 979}
980
981int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
982{
983 /* For e5xx... instructions we only handle TPROT */
984 if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
985 return handle_tprot(vcpu);
986 return -EOPNOTSUPP;
987}
988
8c3f61e2
CH		 989static int handle_sckpf(struct kvm_vcpu *vcpu)
990{
991 u32 value;
992
993 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
208dd756 994 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
8c3f61e2
CH		 995
996 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
997 return kvm_s390_inject_program_int(vcpu,
998 PGM_SPECIFICATION);
999
1000 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
1001 vcpu->arch.sie_block->todpr = value;
1002
1003 return 0;
1004}
1005
77975357 1006static const intercept_handler_t x01_handlers[256] = {
8c3f61e2
CH		 1007 [0x07] = handle_sckpf,
1008};
1009
1010int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
1011{
1012 intercept_handler_t handler;
1013
1014 handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
1015 if (handler)
1016 return handler(vcpu);
1017 return -EOPNOTSUPP;
1018}
Linux kernel - Deliverables
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