2 * handling privileged instructions
4 * Copyright IBM Corp. 2008, 2013
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.
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
14 #include <linux/kvm.h>
15 #include <linux/gfp.h>
16 #include <linux/errno.h>
17 #include <linux/compat.h>
18 #include <asm/asm-offsets.h>
19 #include <asm/current.h>
20 #include <asm/debug.h>
21 #include <asm/ebcdic.h>
22 #include <asm/sysinfo.h>
23 #include <asm/pgtable.h>
24 #include <asm/pgalloc.h>
26 #include <asm/ptrace.h>
27 #include <asm/compat.h>
32 static int handle_set_prefix(struct kvm_vcpu *vcpu)
38 vcpu->stat.instruction_spx++;
40 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
41 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
43 operand2 = kvm_s390_get_base_disp_s(vcpu);
45 /* must be word boundary */
47 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
50 if (get_guest(vcpu, address, (u32 __user *) operand2))
51 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
53 address = address & 0x7fffe000u;
55 /* make sure that the new value is valid memory */
56 if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
57 (copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)))
58 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
60 kvm_s390_set_prefix(vcpu, address);
62 VCPU_EVENT(vcpu, 5, "setting prefix to %x", address);
63 trace_kvm_s390_handle_prefix(vcpu, 1, address);
67 static int handle_store_prefix(struct kvm_vcpu *vcpu)
72 vcpu->stat.instruction_stpx++;
74 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
75 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
77 operand2 = kvm_s390_get_base_disp_s(vcpu);
79 /* must be word boundary */
81 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
83 address = vcpu->arch.sie_block->prefix;
84 address = address & 0x7fffe000u;
87 if (put_guest(vcpu, address, (u32 __user *)operand2))
88 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
90 VCPU_EVENT(vcpu, 5, "storing prefix to %x", address);
91 trace_kvm_s390_handle_prefix(vcpu, 0, address);
95 static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
99 vcpu->stat.instruction_stap++;
101 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
102 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
104 useraddr = kvm_s390_get_base_disp_s(vcpu);
107 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
109 if (put_guest(vcpu, vcpu->vcpu_id, (u16 __user *)useraddr))
110 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
112 VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr);
113 trace_kvm_s390_handle_stap(vcpu, useraddr);
117 static int handle_skey(struct kvm_vcpu *vcpu)
119 vcpu->stat.instruction_storage_key++;
121 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
122 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
124 vcpu->arch.sie_block->gpsw.addr =
125 __rewind_psw(vcpu->arch.sie_block->gpsw, 4);
126 VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
130 static int handle_tpi(struct kvm_vcpu *vcpu)
132 struct kvm_s390_interrupt_info *inti;
136 addr = kvm_s390_get_base_disp_s(vcpu);
138 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
140 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->run->s.regs.crs[6], 0);
146 * Store the two-word I/O interruption code into the
149 if (put_guest(vcpu, inti->io.subchannel_id, (u16 __user *)addr)
150 || put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *)(addr + 2))
151 || put_guest(vcpu, inti->io.io_int_parm, (u32 __user *)(addr + 4)))
152 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
155 * Store the three-word I/O interruption code into
156 * the appropriate lowcore area.
158 put_guest(vcpu, inti->io.subchannel_id, (u16 __user *) __LC_SUBCHANNEL_ID);
159 put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *) __LC_SUBCHANNEL_NR);
160 put_guest(vcpu, inti->io.io_int_parm, (u32 __user *) __LC_IO_INT_PARM);
161 put_guest(vcpu, inti->io.io_int_word, (u32 __user *) __LC_IO_INT_WORD);
165 /* Set condition code and we're done. */
166 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
167 vcpu->arch.sie_block->gpsw.mask |= (cc & 3ul) << 44;
171 static int handle_tsch(struct kvm_vcpu *vcpu)
173 struct kvm_s390_interrupt_info *inti;
175 inti = kvm_s390_get_io_int(vcpu->kvm, 0,
176 vcpu->run->s.regs.gprs[1]);
179 * Prepare exit to userspace.
180 * We indicate whether we dequeued a pending I/O interrupt
181 * so that userspace can re-inject it if the instruction gets
182 * a program check. While this may re-order the pending I/O
183 * interrupts, this is no problem since the priority is kept
186 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
187 vcpu->run->s390_tsch.dequeued = !!inti;
189 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
190 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
191 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
192 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
194 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
199 static int handle_io_inst(struct kvm_vcpu *vcpu)
201 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
203 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
204 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
206 if (vcpu->kvm->arch.css_support) {
208 * Most I/O instructions will be handled by userspace.
209 * Exceptions are tpi and the interrupt portion of tsch.
211 if (vcpu->arch.sie_block->ipa == 0xb236)
212 return handle_tpi(vcpu);
213 if (vcpu->arch.sie_block->ipa == 0xb235)
214 return handle_tsch(vcpu);
215 /* Handle in userspace. */
219 * Set condition code 3 to stop the guest from issueing channel
222 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
223 vcpu->arch.sie_block->gpsw.mask |= (3 & 3ul) << 44;
228 static int handle_stfl(struct kvm_vcpu *vcpu)
230 unsigned int facility_list;
233 vcpu->stat.instruction_stfl++;
235 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
236 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
238 /* only pass the facility bits, which we can handle */
239 facility_list = S390_lowcore.stfl_fac_list & 0xff82fff3;
241 rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
242 &facility_list, sizeof(facility_list));
244 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
245 VCPU_EVENT(vcpu, 5, "store facility list value %x", facility_list);
246 trace_kvm_s390_handle_stfl(vcpu, facility_list);
250 static void handle_new_psw(struct kvm_vcpu *vcpu)
252 /* Check whether the new psw is enabled for machine checks. */
253 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK)
254 kvm_s390_deliver_pending_machine_checks(vcpu);
257 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
258 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
259 #define PSW_ADDR_24 0x0000000000ffffffUL
260 #define PSW_ADDR_31 0x000000007fffffffUL
262 static int is_valid_psw(psw_t *psw) {
263 if (psw->mask & PSW_MASK_UNASSIGNED)
265 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
266 if (psw->addr & ~PSW_ADDR_31)
269 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
271 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
276 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
278 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
279 psw_compat_t new_psw;
282 if (gpsw->mask & PSW_MASK_PSTATE)
283 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
285 addr = kvm_s390_get_base_disp_s(vcpu);
287 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
288 if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
289 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
290 if (!(new_psw.mask & PSW32_MASK_BASE))
291 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
292 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
293 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
294 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
295 if (!is_valid_psw(gpsw))
296 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
297 handle_new_psw(vcpu);
301 static int handle_lpswe(struct kvm_vcpu *vcpu)
306 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
307 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
309 addr = kvm_s390_get_base_disp_s(vcpu);
311 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
312 if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
313 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
314 vcpu->arch.sie_block->gpsw = new_psw;
315 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
316 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
317 handle_new_psw(vcpu);
321 static int handle_stidp(struct kvm_vcpu *vcpu)
325 vcpu->stat.instruction_stidp++;
327 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
328 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
330 operand2 = kvm_s390_get_base_disp_s(vcpu);
333 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
335 if (put_guest(vcpu, vcpu->arch.stidp_data, (u64 __user *)operand2))
336 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
338 VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
342 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
344 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
348 spin_lock(&fi->lock);
349 for (n = 0; n < KVM_MAX_VCPUS; n++)
350 if (fi->local_int[n])
352 spin_unlock(&fi->lock);
354 /* deal with other level 3 hypervisors */
355 if (stsi(mem, 3, 2, 2))
359 for (n = mem->count - 1; n > 0 ; n--)
360 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
362 mem->vm[0].cpus_total = cpus;
363 mem->vm[0].cpus_configured = cpus;
364 mem->vm[0].cpus_standby = 0;
365 mem->vm[0].cpus_reserved = 0;
366 mem->vm[0].caf = 1000;
367 memcpy(mem->vm[0].name, "KVMguest", 8);
368 ASCEBC(mem->vm[0].name, 8);
369 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
370 ASCEBC(mem->vm[0].cpi, 16);
373 static int handle_stsi(struct kvm_vcpu *vcpu)
375 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
376 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
377 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
378 unsigned long mem = 0;
382 vcpu->stat.instruction_stsi++;
383 VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
385 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
386 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
389 vcpu->arch.sie_block->gpsw.mask |= 3ul << 44; /* cc 3 */
393 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
394 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
395 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
398 vcpu->run->s.regs.gprs[0] = 3 << 28;
399 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); /* cc 0 */
403 operand2 = kvm_s390_get_base_disp_s(vcpu);
405 if (operand2 & 0xfff)
406 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
409 case 1: /* same handling for 1 and 2 */
411 mem = get_zeroed_page(GFP_KERNEL);
414 if (stsi((void *) mem, fc, sel1, sel2))
418 if (sel1 != 2 || sel2 != 2)
420 mem = get_zeroed_page(GFP_KERNEL);
423 handle_stsi_3_2_2(vcpu, (void *) mem);
427 if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
428 rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
431 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
433 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
434 vcpu->run->s.regs.gprs[0] = 0;
437 /* condition code 3 */
438 vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
444 static const intercept_handler_t b2_handlers[256] = {
445 [0x02] = handle_stidp,
446 [0x10] = handle_set_prefix,
447 [0x11] = handle_store_prefix,
448 [0x12] = handle_store_cpu_address,
449 [0x29] = handle_skey,
450 [0x2a] = handle_skey,
451 [0x2b] = handle_skey,
452 [0x30] = handle_io_inst,
453 [0x31] = handle_io_inst,
454 [0x32] = handle_io_inst,
455 [0x33] = handle_io_inst,
456 [0x34] = handle_io_inst,
457 [0x35] = handle_io_inst,
458 [0x36] = handle_io_inst,
459 [0x37] = handle_io_inst,
460 [0x38] = handle_io_inst,
461 [0x39] = handle_io_inst,
462 [0x3a] = handle_io_inst,
463 [0x3b] = handle_io_inst,
464 [0x3c] = handle_io_inst,
465 [0x5f] = handle_io_inst,
466 [0x74] = handle_io_inst,
467 [0x76] = handle_io_inst,
468 [0x7d] = handle_stsi,
469 [0xb1] = handle_stfl,
470 [0xb2] = handle_lpswe,
473 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
475 intercept_handler_t handler;
478 * A lot of B2 instructions are priviledged. Here we check for
479 * the privileged ones, that we can handle in the kernel.
480 * Anything else goes to userspace.
482 handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
484 return handler(vcpu);
489 static int handle_epsw(struct kvm_vcpu *vcpu)
493 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
495 /* This basically extracts the mask half of the psw. */
496 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000;
497 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
499 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000;
500 vcpu->run->s.regs.gprs[reg2] |=
501 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffff;
506 #define PFMF_RESERVED 0xfffc0101UL
507 #define PFMF_SK 0x00020000UL
508 #define PFMF_CF 0x00010000UL
509 #define PFMF_UI 0x00008000UL
510 #define PFMF_FSC 0x00007000UL
511 #define PFMF_NQ 0x00000800UL
512 #define PFMF_MR 0x00000400UL
513 #define PFMF_MC 0x00000200UL
514 #define PFMF_KEY 0x000000feUL
516 static int handle_pfmf(struct kvm_vcpu *vcpu)
519 unsigned long start, end;
521 vcpu->stat.instruction_pfmf++;
523 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
525 if (!MACHINE_HAS_PFMF)
526 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
528 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
529 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
531 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
532 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
534 /* Only provide non-quiescing support if the host supports it */
535 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
536 S390_lowcore.stfl_fac_list & 0x00020000)
537 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
539 /* No support for conditional-SSKE */
540 if (vcpu->run->s.regs.gprs[reg1] & (PFMF_MR | PFMF_MC))
541 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
543 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
544 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
546 end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
549 end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
551 /* We dont support EDAT2
553 end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
556 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
558 while (start < end) {
559 unsigned long useraddr;
561 useraddr = gmap_translate(start, vcpu->arch.gmap);
562 if (IS_ERR((void *)useraddr))
563 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
565 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
566 if (clear_user((void __user *)useraddr, PAGE_SIZE))
567 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
570 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
571 if (set_guest_storage_key(current->mm, useraddr,
572 vcpu->run->s.regs.gprs[reg1] & PFMF_KEY,
573 vcpu->run->s.regs.gprs[reg1] & PFMF_NQ))
574 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
579 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC)
580 vcpu->run->s.regs.gprs[reg2] = end;
584 static const intercept_handler_t b9_handlers[256] = {
585 [0x8d] = handle_epsw,
586 [0x9c] = handle_io_inst,
587 [0xaf] = handle_pfmf,
590 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
592 intercept_handler_t handler;
594 /* This is handled just as for the B2 instructions. */
595 handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
597 return handler(vcpu);
602 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
604 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
605 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
610 vcpu->stat.instruction_lctl++;
612 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
613 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
615 useraddr = kvm_s390_get_base_disp_rs(vcpu);
618 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
620 VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3,
622 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, useraddr);
626 rc = get_guest(vcpu, val, (u32 __user *) useraddr);
628 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
629 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
630 vcpu->arch.sie_block->gcr[reg] |= val;
634 reg = (reg + 1) % 16;
640 static int handle_lctlg(struct kvm_vcpu *vcpu)
642 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
643 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
647 vcpu->stat.instruction_lctlg++;
649 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
650 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
652 useraddr = kvm_s390_get_base_disp_rsy(vcpu);
655 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
659 VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3,
661 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, useraddr);
664 rc = get_guest(vcpu, vcpu->arch.sie_block->gcr[reg],
665 (u64 __user *) useraddr);
667 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
671 reg = (reg + 1) % 16;
677 static const intercept_handler_t eb_handlers[256] = {
678 [0x2f] = handle_lctlg,
679 [0x8a] = handle_io_inst,
682 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
684 intercept_handler_t handler;
686 handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
688 return handler(vcpu);
692 static int handle_tprot(struct kvm_vcpu *vcpu)
694 u64 address1, address2;
695 struct vm_area_struct *vma;
696 unsigned long user_address;
698 vcpu->stat.instruction_tprot++;
700 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
701 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
703 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
705 /* we only handle the Linux memory detection case:
708 * everything else goes to userspace. */
711 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
714 down_read(¤t->mm->mmap_sem);
715 user_address = __gmap_translate(address1, vcpu->arch.gmap);
716 if (IS_ERR_VALUE(user_address))
718 vma = find_vma(current->mm, user_address);
721 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
722 if (!(vma->vm_flags & VM_WRITE) && (vma->vm_flags & VM_READ))
723 vcpu->arch.sie_block->gpsw.mask |= (1ul << 44);
724 if (!(vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_READ))
725 vcpu->arch.sie_block->gpsw.mask |= (2ul << 44);
727 up_read(¤t->mm->mmap_sem);
731 up_read(¤t->mm->mmap_sem);
732 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
735 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
737 /* For e5xx... instructions we only handle TPROT */
738 if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
739 return handle_tprot(vcpu);
743 static int handle_sckpf(struct kvm_vcpu *vcpu)
747 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
748 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
750 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
751 return kvm_s390_inject_program_int(vcpu,
754 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
755 vcpu->arch.sie_block->todpr = value;
760 static const intercept_handler_t x01_handlers[256] = {
761 [0x07] = handle_sckpf,
764 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
766 intercept_handler_t handler;
768 handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
770 return handler(vcpu);