1 // SPDX-License-Identifier: GPL-2.0
3 * handling privileged instructions
5 * Copyright IBM Corp. 2008, 2018
7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
11 #include <linux/kvm.h>
12 #include <linux/gfp.h>
13 #include <linux/errno.h>
14 #include <linux/compat.h>
15 #include <linux/mm_types.h>
17 #include <asm/asm-offsets.h>
18 #include <asm/facility.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/page-states.h>
25 #include <asm/pgalloc.h>
28 #include <asm/ptrace.h>
34 static int handle_ri(struct kvm_vcpu *vcpu)
36 vcpu->stat.instruction_ri++;
38 if (test_kvm_facility(vcpu->kvm, 64)) {
39 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (lazy)");
40 vcpu->arch.sie_block->ecb3 |= ECB3_RI;
41 kvm_s390_retry_instr(vcpu);
44 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
47 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu)
49 if ((vcpu->arch.sie_block->ipa & 0xf) <= 4)
50 return handle_ri(vcpu);
55 static int handle_gs(struct kvm_vcpu *vcpu)
57 vcpu->stat.instruction_gs++;
59 if (test_kvm_facility(vcpu->kvm, 133)) {
60 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (lazy)");
63 current->thread.gs_cb = (struct gs_cb *)&vcpu->run->s.regs.gscb;
64 restore_gs_cb(current->thread.gs_cb);
66 vcpu->arch.sie_block->ecb |= ECB_GS;
67 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
68 vcpu->arch.gs_enabled = 1;
69 kvm_s390_retry_instr(vcpu);
72 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
75 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu)
77 int code = vcpu->arch.sie_block->ipb & 0xff;
79 if (code == 0x49 || code == 0x4d)
80 return handle_gs(vcpu);
84 /* Handle SCK (SET CLOCK) interception */
85 static int handle_set_clock(struct kvm_vcpu *vcpu)
87 struct kvm_s390_vm_tod_clock gtod = { 0 };
92 vcpu->stat.instruction_sck++;
94 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
95 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
97 op2 = kvm_s390_get_base_disp_s(vcpu, &ar);
98 if (op2 & 7) /* Operand must be on a doubleword boundary */
99 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
100 rc = read_guest(vcpu, op2, ar, >od.tod, sizeof(gtod.tod));
102 return kvm_s390_inject_prog_cond(vcpu, rc);
104 VCPU_EVENT(vcpu, 3, "SCK: setting guest TOD to 0x%llx", gtod.tod);
105 kvm_s390_set_tod_clock(vcpu->kvm, >od);
107 kvm_s390_set_psw_cc(vcpu, 0);
111 static int handle_set_prefix(struct kvm_vcpu *vcpu)
118 vcpu->stat.instruction_spx++;
120 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
121 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
123 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
125 /* must be word boundary */
127 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
130 rc = read_guest(vcpu, operand2, ar, &address, sizeof(address));
132 return kvm_s390_inject_prog_cond(vcpu, rc);
134 address &= 0x7fffe000u;
137 * Make sure the new value is valid memory. We only need to check the
138 * first page, since address is 8k aligned and memory pieces are always
139 * at least 1MB aligned and have at least a size of 1MB.
141 if (kvm_is_error_gpa(vcpu->kvm, address))
142 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
144 kvm_s390_set_prefix(vcpu, address);
145 trace_kvm_s390_handle_prefix(vcpu, 1, address);
149 static int handle_store_prefix(struct kvm_vcpu *vcpu)
156 vcpu->stat.instruction_stpx++;
158 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
159 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
161 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
163 /* must be word boundary */
165 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
167 address = kvm_s390_get_prefix(vcpu);
170 rc = write_guest(vcpu, operand2, ar, &address, sizeof(address));
172 return kvm_s390_inject_prog_cond(vcpu, rc);
174 VCPU_EVENT(vcpu, 3, "STPX: storing prefix 0x%x into 0x%llx", address, operand2);
175 trace_kvm_s390_handle_prefix(vcpu, 0, address);
179 static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
181 u16 vcpu_id = vcpu->vcpu_id;
186 vcpu->stat.instruction_stap++;
188 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
189 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
191 ga = kvm_s390_get_base_disp_s(vcpu, &ar);
194 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
196 rc = write_guest(vcpu, ga, ar, &vcpu_id, sizeof(vcpu_id));
198 return kvm_s390_inject_prog_cond(vcpu, rc);
200 VCPU_EVENT(vcpu, 3, "STAP: storing cpu address (%u) to 0x%llx", vcpu_id, ga);
201 trace_kvm_s390_handle_stap(vcpu, ga);
205 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu)
209 trace_kvm_s390_skey_related_inst(vcpu);
210 /* Already enabled? */
211 if (vcpu->arch.skey_enabled)
214 rc = s390_enable_skey();
215 VCPU_EVENT(vcpu, 3, "enabling storage keys for guest: %d", rc);
219 if (kvm_s390_test_cpuflags(vcpu, CPUSTAT_KSS))
220 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_KSS);
221 if (!vcpu->kvm->arch.use_skf)
222 vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
224 vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
225 vcpu->arch.skey_enabled = true;
229 static int try_handle_skey(struct kvm_vcpu *vcpu)
233 rc = kvm_s390_skey_check_enable(vcpu);
236 if (vcpu->kvm->arch.use_skf) {
237 /* with storage-key facility, SIE interprets it for us */
238 kvm_s390_retry_instr(vcpu);
239 VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
245 static int handle_iske(struct kvm_vcpu *vcpu)
247 unsigned long gaddr, vmaddr;
253 vcpu->stat.instruction_iske++;
255 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
256 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
258 rc = try_handle_skey(vcpu);
260 return rc != -EAGAIN ? rc : 0;
262 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
264 gaddr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
265 gaddr = kvm_s390_logical_to_effective(vcpu, gaddr);
266 gaddr = kvm_s390_real_to_abs(vcpu, gaddr);
267 vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(gaddr));
268 if (kvm_is_error_hva(vmaddr))
269 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
272 down_read(¤t->mm->mmap_sem);
273 rc = get_guest_storage_key(current->mm, vmaddr, &key);
276 rc = fixup_user_fault(current, current->mm, vmaddr,
277 FAULT_FLAG_WRITE, &unlocked);
279 up_read(¤t->mm->mmap_sem);
283 up_read(¤t->mm->mmap_sem);
285 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
288 vcpu->run->s.regs.gprs[reg1] &= ~0xff;
289 vcpu->run->s.regs.gprs[reg1] |= key;
293 static int handle_rrbe(struct kvm_vcpu *vcpu)
295 unsigned long vmaddr, gaddr;
300 vcpu->stat.instruction_rrbe++;
302 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
303 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
305 rc = try_handle_skey(vcpu);
307 return rc != -EAGAIN ? rc : 0;
309 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
311 gaddr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
312 gaddr = kvm_s390_logical_to_effective(vcpu, gaddr);
313 gaddr = kvm_s390_real_to_abs(vcpu, gaddr);
314 vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(gaddr));
315 if (kvm_is_error_hva(vmaddr))
316 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
319 down_read(¤t->mm->mmap_sem);
320 rc = reset_guest_reference_bit(current->mm, vmaddr);
322 rc = fixup_user_fault(current, current->mm, vmaddr,
323 FAULT_FLAG_WRITE, &unlocked);
325 up_read(¤t->mm->mmap_sem);
329 up_read(¤t->mm->mmap_sem);
331 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
334 kvm_s390_set_psw_cc(vcpu, rc);
342 static int handle_sske(struct kvm_vcpu *vcpu)
344 unsigned char m3 = vcpu->arch.sie_block->ipb >> 28;
345 unsigned long start, end;
346 unsigned char key, oldkey;
351 vcpu->stat.instruction_sske++;
353 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
354 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
356 rc = try_handle_skey(vcpu);
358 return rc != -EAGAIN ? rc : 0;
360 if (!test_kvm_facility(vcpu->kvm, 8))
362 if (!test_kvm_facility(vcpu->kvm, 10))
363 m3 &= ~(SSKE_MC | SSKE_MR);
364 if (!test_kvm_facility(vcpu->kvm, 14))
367 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
369 key = vcpu->run->s.regs.gprs[reg1] & 0xfe;
370 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
371 start = kvm_s390_logical_to_effective(vcpu, start);
373 /* start already designates an absolute address */
374 end = (start + _SEGMENT_SIZE) & ~(_SEGMENT_SIZE - 1);
376 start = kvm_s390_real_to_abs(vcpu, start);
377 end = start + PAGE_SIZE;
380 while (start != end) {
381 unsigned long vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
384 if (kvm_is_error_hva(vmaddr))
385 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
387 down_read(¤t->mm->mmap_sem);
388 rc = cond_set_guest_storage_key(current->mm, vmaddr, key, &oldkey,
389 m3 & SSKE_NQ, m3 & SSKE_MR,
393 rc = fixup_user_fault(current, current->mm, vmaddr,
394 FAULT_FLAG_WRITE, &unlocked);
395 rc = !rc ? -EAGAIN : rc;
397 up_read(¤t->mm->mmap_sem);
399 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
407 if (m3 & (SSKE_MC | SSKE_MR)) {
409 /* skey in reg1 is unpredictable */
410 kvm_s390_set_psw_cc(vcpu, 3);
412 kvm_s390_set_psw_cc(vcpu, rc);
413 vcpu->run->s.regs.gprs[reg1] &= ~0xff00UL;
414 vcpu->run->s.regs.gprs[reg1] |= (u64) oldkey << 8;
418 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_64BIT)
419 vcpu->run->s.regs.gprs[reg2] &= ~PAGE_MASK;
421 vcpu->run->s.regs.gprs[reg2] &= ~0xfffff000UL;
422 end = kvm_s390_logical_to_effective(vcpu, end);
423 vcpu->run->s.regs.gprs[reg2] |= end;
428 static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
430 vcpu->stat.instruction_ipte_interlock++;
431 if (psw_bits(vcpu->arch.sie_block->gpsw).pstate)
432 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
433 wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
434 kvm_s390_retry_instr(vcpu);
435 VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
439 static int handle_test_block(struct kvm_vcpu *vcpu)
444 vcpu->stat.instruction_tb++;
446 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
447 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
449 kvm_s390_get_regs_rre(vcpu, NULL, ®2);
450 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
451 addr = kvm_s390_logical_to_effective(vcpu, addr);
452 if (kvm_s390_check_low_addr_prot_real(vcpu, addr))
453 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
454 addr = kvm_s390_real_to_abs(vcpu, addr);
456 if (kvm_is_error_gpa(vcpu->kvm, addr))
457 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
459 * We don't expect errors on modern systems, and do not care
460 * about storage keys (yet), so let's just clear the page.
462 if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
464 kvm_s390_set_psw_cc(vcpu, 0);
465 vcpu->run->s.regs.gprs[0] = 0;
469 static int handle_tpi(struct kvm_vcpu *vcpu)
471 struct kvm_s390_interrupt_info *inti;
478 vcpu->stat.instruction_tpi++;
480 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
482 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
484 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0);
486 kvm_s390_set_psw_cc(vcpu, 0);
490 tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
491 tpi_data[1] = inti->io.io_int_parm;
492 tpi_data[2] = inti->io.io_int_word;
495 * Store the two-word I/O interruption code into the
498 len = sizeof(tpi_data) - 4;
499 rc = write_guest(vcpu, addr, ar, &tpi_data, len);
501 rc = kvm_s390_inject_prog_cond(vcpu, rc);
502 goto reinject_interrupt;
506 * Store the three-word I/O interruption code into
507 * the appropriate lowcore area.
509 len = sizeof(tpi_data);
510 if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len)) {
511 /* failed writes to the low core are not recoverable */
513 goto reinject_interrupt;
517 /* irq was successfully handed to the guest */
519 kvm_s390_set_psw_cc(vcpu, 1);
523 * If we encounter a problem storing the interruption code, the
524 * instruction is suppressed from the guest's view: reinject the
527 if (kvm_s390_reinject_io_int(vcpu->kvm, inti)) {
531 /* don't set the cc, a pgm irq was injected or we drop to user space */
532 return rc ? -EFAULT : 0;
535 static int handle_tsch(struct kvm_vcpu *vcpu)
537 struct kvm_s390_interrupt_info *inti = NULL;
538 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
540 vcpu->stat.instruction_tsch++;
542 /* a valid schid has at least one bit set */
543 if (vcpu->run->s.regs.gprs[1])
544 inti = kvm_s390_get_io_int(vcpu->kvm, isc_mask,
545 vcpu->run->s.regs.gprs[1]);
548 * Prepare exit to userspace.
549 * We indicate whether we dequeued a pending I/O interrupt
550 * so that userspace can re-inject it if the instruction gets
551 * a program check. While this may re-order the pending I/O
552 * interrupts, this is no problem since the priority is kept
555 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
556 vcpu->run->s390_tsch.dequeued = !!inti;
558 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
559 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
560 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
561 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
563 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
568 static int handle_io_inst(struct kvm_vcpu *vcpu)
570 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
572 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
573 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
575 if (vcpu->kvm->arch.css_support) {
577 * Most I/O instructions will be handled by userspace.
578 * Exceptions are tpi and the interrupt portion of tsch.
580 if (vcpu->arch.sie_block->ipa == 0xb236)
581 return handle_tpi(vcpu);
582 if (vcpu->arch.sie_block->ipa == 0xb235)
583 return handle_tsch(vcpu);
584 /* Handle in userspace. */
585 vcpu->stat.instruction_io_other++;
589 * Set condition code 3 to stop the guest from issuing channel
592 kvm_s390_set_psw_cc(vcpu, 3);
597 static int handle_stfl(struct kvm_vcpu *vcpu)
602 vcpu->stat.instruction_stfl++;
604 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
605 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
608 * We need to shift the lower 32 facility bits (bit 0-31) from a u64
609 * into a u32 memory representation. They will remain bits 0-31.
611 fac = *vcpu->kvm->arch.model.fac_list >> 32;
612 rc = write_guest_lc(vcpu, offsetof(struct lowcore, stfl_fac_list),
616 VCPU_EVENT(vcpu, 3, "STFL: store facility list 0x%x", fac);
617 trace_kvm_s390_handle_stfl(vcpu, fac);
621 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
622 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
623 #define PSW_ADDR_24 0x0000000000ffffffUL
624 #define PSW_ADDR_31 0x000000007fffffffUL
626 int is_valid_psw(psw_t *psw)
628 if (psw->mask & PSW_MASK_UNASSIGNED)
630 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
631 if (psw->addr & ~PSW_ADDR_31)
634 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
636 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
643 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
645 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
646 psw_compat_t new_psw;
651 vcpu->stat.instruction_lpsw++;
653 if (gpsw->mask & PSW_MASK_PSTATE)
654 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
656 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
658 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
660 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
662 return kvm_s390_inject_prog_cond(vcpu, rc);
663 if (!(new_psw.mask & PSW32_MASK_BASE))
664 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
665 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
666 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
667 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
668 if (!is_valid_psw(gpsw))
669 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
673 static int handle_lpswe(struct kvm_vcpu *vcpu)
680 vcpu->stat.instruction_lpswe++;
682 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
683 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
685 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
687 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
688 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
690 return kvm_s390_inject_prog_cond(vcpu, rc);
691 vcpu->arch.sie_block->gpsw = new_psw;
692 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
693 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
697 static int handle_stidp(struct kvm_vcpu *vcpu)
699 u64 stidp_data = vcpu->kvm->arch.model.cpuid;
704 vcpu->stat.instruction_stidp++;
706 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
707 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
709 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
712 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
714 rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data));
716 return kvm_s390_inject_prog_cond(vcpu, rc);
718 VCPU_EVENT(vcpu, 3, "STIDP: store cpu id 0x%llx", stidp_data);
722 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
727 cpus = atomic_read(&vcpu->kvm->online_vcpus);
729 /* deal with other level 3 hypervisors */
730 if (stsi(mem, 3, 2, 2))
734 for (n = mem->count - 1; n > 0 ; n--)
735 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
737 memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
738 mem->vm[0].cpus_total = cpus;
739 mem->vm[0].cpus_configured = cpus;
740 mem->vm[0].cpus_standby = 0;
741 mem->vm[0].cpus_reserved = 0;
742 mem->vm[0].caf = 1000;
743 memcpy(mem->vm[0].name, "KVMguest", 8);
744 ASCEBC(mem->vm[0].name, 8);
745 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
746 ASCEBC(mem->vm[0].cpi, 16);
749 static void insert_stsi_usr_data(struct kvm_vcpu *vcpu, u64 addr, u8 ar,
750 u8 fc, u8 sel1, u16 sel2)
752 vcpu->run->exit_reason = KVM_EXIT_S390_STSI;
753 vcpu->run->s390_stsi.addr = addr;
754 vcpu->run->s390_stsi.ar = ar;
755 vcpu->run->s390_stsi.fc = fc;
756 vcpu->run->s390_stsi.sel1 = sel1;
757 vcpu->run->s390_stsi.sel2 = sel2;
760 static int handle_stsi(struct kvm_vcpu *vcpu)
762 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
763 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
764 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
765 unsigned long mem = 0;
770 vcpu->stat.instruction_stsi++;
771 VCPU_EVENT(vcpu, 3, "STSI: fc: %u sel1: %u sel2: %u", fc, sel1, sel2);
773 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
774 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
777 kvm_s390_set_psw_cc(vcpu, 3);
781 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
782 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
783 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
786 vcpu->run->s.regs.gprs[0] = 3 << 28;
787 kvm_s390_set_psw_cc(vcpu, 0);
791 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
793 if (operand2 & 0xfff)
794 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
797 case 1: /* same handling for 1 and 2 */
799 mem = get_zeroed_page(GFP_KERNEL);
802 if (stsi((void *) mem, fc, sel1, sel2))
806 if (sel1 != 2 || sel2 != 2)
808 mem = get_zeroed_page(GFP_KERNEL);
811 handle_stsi_3_2_2(vcpu, (void *) mem);
815 rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE);
817 rc = kvm_s390_inject_prog_cond(vcpu, rc);
820 if (vcpu->kvm->arch.user_stsi) {
821 insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2);
824 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
826 kvm_s390_set_psw_cc(vcpu, 0);
827 vcpu->run->s.regs.gprs[0] = 0;
830 kvm_s390_set_psw_cc(vcpu, 3);
836 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
838 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
840 return handle_stidp(vcpu);
842 return handle_set_clock(vcpu);
844 return handle_set_prefix(vcpu);
846 return handle_store_prefix(vcpu);
848 return handle_store_cpu_address(vcpu);
850 return kvm_s390_handle_vsie(vcpu);
853 return handle_ipte_interlock(vcpu);
855 return handle_iske(vcpu);
857 return handle_rrbe(vcpu);
859 return handle_sske(vcpu);
861 return handle_test_block(vcpu);
878 return handle_io_inst(vcpu);
880 return handle_sthyi(vcpu);
882 return handle_stsi(vcpu);
884 return handle_stfl(vcpu);
886 return handle_lpswe(vcpu);
892 static int handle_epsw(struct kvm_vcpu *vcpu)
896 vcpu->stat.instruction_epsw++;
898 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
900 /* This basically extracts the mask half of the psw. */
901 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
902 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
904 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
905 vcpu->run->s.regs.gprs[reg2] |=
906 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
911 #define PFMF_RESERVED 0xfffc0101UL
912 #define PFMF_SK 0x00020000UL
913 #define PFMF_CF 0x00010000UL
914 #define PFMF_UI 0x00008000UL
915 #define PFMF_FSC 0x00007000UL
916 #define PFMF_NQ 0x00000800UL
917 #define PFMF_MR 0x00000400UL
918 #define PFMF_MC 0x00000200UL
919 #define PFMF_KEY 0x000000feUL
921 static int handle_pfmf(struct kvm_vcpu *vcpu)
923 bool mr = false, mc = false, nq;
925 unsigned long start, end;
928 vcpu->stat.instruction_pfmf++;
930 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
932 if (!test_kvm_facility(vcpu->kvm, 8))
933 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
935 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
936 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
938 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
939 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
941 /* Only provide non-quiescing support if enabled for the guest */
942 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
943 !test_kvm_facility(vcpu->kvm, 14))
944 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
946 /* Only provide conditional-SSKE support if enabled for the guest */
947 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK &&
948 test_kvm_facility(vcpu->kvm, 10)) {
949 mr = vcpu->run->s.regs.gprs[reg1] & PFMF_MR;
950 mc = vcpu->run->s.regs.gprs[reg1] & PFMF_MC;
953 nq = vcpu->run->s.regs.gprs[reg1] & PFMF_NQ;
954 key = vcpu->run->s.regs.gprs[reg1] & PFMF_KEY;
955 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
956 start = kvm_s390_logical_to_effective(vcpu, start);
958 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
959 if (kvm_s390_check_low_addr_prot_real(vcpu, start))
960 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
963 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
965 /* only 4k frames specify a real address */
966 start = kvm_s390_real_to_abs(vcpu, start);
967 end = (start + PAGE_SIZE) & ~(PAGE_SIZE - 1);
970 end = (start + _SEGMENT_SIZE) & ~(_SEGMENT_SIZE - 1);
973 /* only support 2G frame size if EDAT2 is available and we are
974 not in 24-bit addressing mode */
975 if (!test_kvm_facility(vcpu->kvm, 78) ||
976 psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_24BIT)
977 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
978 end = (start + _REGION3_SIZE) & ~(_REGION3_SIZE - 1);
981 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
984 while (start != end) {
985 unsigned long vmaddr;
986 bool unlocked = false;
988 /* Translate guest address to host address */
989 vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
990 if (kvm_is_error_hva(vmaddr))
991 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
993 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
994 if (kvm_clear_guest(vcpu->kvm, start, PAGE_SIZE))
995 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
998 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
999 int rc = kvm_s390_skey_check_enable(vcpu);
1003 down_read(¤t->mm->mmap_sem);
1004 rc = cond_set_guest_storage_key(current->mm, vmaddr,
1005 key, NULL, nq, mr, mc);
1007 rc = fixup_user_fault(current, current->mm, vmaddr,
1008 FAULT_FLAG_WRITE, &unlocked);
1009 rc = !rc ? -EAGAIN : rc;
1011 up_read(¤t->mm->mmap_sem);
1013 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1021 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
1022 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_64BIT) {
1023 vcpu->run->s.regs.gprs[reg2] = end;
1025 vcpu->run->s.regs.gprs[reg2] &= ~0xffffffffUL;
1026 end = kvm_s390_logical_to_effective(vcpu, end);
1027 vcpu->run->s.regs.gprs[reg2] |= end;
1034 * Must be called with relevant read locks held (kvm->mm->mmap_sem, kvm->srcu)
1036 static inline int __do_essa(struct kvm_vcpu *vcpu, const int orc)
1038 int r1, r2, nappended, entries;
1039 unsigned long gfn, hva, res, pgstev, ptev;
1040 unsigned long *cbrlo;
1043 * We don't need to set SD.FPF.SK to 1 here, because if we have a
1044 * machine check here we either handle it or crash
1047 kvm_s390_get_regs_rre(vcpu, &r1, &r2);
1048 gfn = vcpu->run->s.regs.gprs[r2] >> PAGE_SHIFT;
1049 hva = gfn_to_hva(vcpu->kvm, gfn);
1050 entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
1052 if (kvm_is_error_hva(hva))
1053 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1055 nappended = pgste_perform_essa(vcpu->kvm->mm, hva, orc, &ptev, &pgstev);
1056 if (nappended < 0) {
1057 res = orc ? 0x10 : 0;
1058 vcpu->run->s.regs.gprs[r1] = res; /* Exception Indication */
1061 res = (pgstev & _PGSTE_GPS_USAGE_MASK) >> 22;
1063 * Set the block-content state part of the result. 0 means resident, so
1064 * nothing to do if the page is valid. 2 is for preserved pages
1065 * (non-present and non-zero), and 3 for zero pages (non-present and
1068 if (ptev & _PAGE_INVALID) {
1070 if (pgstev & _PGSTE_GPS_ZERO)
1073 if (pgstev & _PGSTE_GPS_NODAT)
1075 vcpu->run->s.regs.gprs[r1] = res;
1077 * It is possible that all the normal 511 slots were full, in which case
1078 * we will now write in the 512th slot, which is reserved for host use.
1079 * In both cases we let the normal essa handling code process all the
1080 * slots, including the reserved one, if needed.
1082 if (nappended > 0) {
1083 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo & PAGE_MASK);
1084 cbrlo[entries] = gfn << PAGE_SHIFT;
1088 struct kvm_memory_slot *ms = gfn_to_memslot(vcpu->kvm, gfn);
1090 /* Increment only if we are really flipping the bit */
1091 if (ms && !test_and_set_bit(gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms)))
1092 atomic64_inc(&vcpu->kvm->arch.cmma_dirty_pages);
1098 static int handle_essa(struct kvm_vcpu *vcpu)
1100 /* entries expected to be 1FF */
1101 int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
1102 unsigned long *cbrlo;
1106 VCPU_EVENT(vcpu, 4, "ESSA: release %d pages", entries);
1107 gmap = vcpu->arch.gmap;
1108 vcpu->stat.instruction_essa++;
1109 if (!vcpu->kvm->arch.use_cmma)
1110 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
1112 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1113 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1114 /* Check for invalid operation request code */
1115 orc = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
1116 /* ORCs 0-6 are always valid */
1117 if (orc > (test_kvm_facility(vcpu->kvm, 147) ? ESSA_SET_STABLE_NODAT
1118 : ESSA_SET_STABLE_IF_RESIDENT))
1119 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1121 if (!vcpu->kvm->arch.migration_mode) {
1123 * CMMA is enabled in the KVM settings, but is disabled in
1124 * the SIE block and in the mm_context, and we are not doing
1125 * a migration. Enable CMMA in the mm_context.
1126 * Since we need to take a write lock to write to the context
1127 * to avoid races with storage keys handling, we check if the
1128 * value really needs to be written to; if the value is
1129 * already correct, we do nothing and avoid the lock.
1131 if (vcpu->kvm->mm->context.uses_cmm == 0) {
1132 down_write(&vcpu->kvm->mm->mmap_sem);
1133 vcpu->kvm->mm->context.uses_cmm = 1;
1134 up_write(&vcpu->kvm->mm->mmap_sem);
1137 * If we are here, we are supposed to have CMMA enabled in
1138 * the SIE block. Enabling CMMA works on a per-CPU basis,
1139 * while the context use_cmma flag is per process.
1140 * It's possible that the context flag is enabled and the
1141 * SIE flag is not, so we set the flag always; if it was
1142 * already set, nothing changes, otherwise we enable it
1145 vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
1146 /* Retry the ESSA instruction */
1147 kvm_s390_retry_instr(vcpu);
1151 down_read(&vcpu->kvm->mm->mmap_sem);
1152 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1153 i = __do_essa(vcpu, orc);
1154 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
1155 up_read(&vcpu->kvm->mm->mmap_sem);
1158 /* Account for the possible extra cbrl entry */
1161 vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
1162 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
1163 down_read(&gmap->mm->mmap_sem);
1164 for (i = 0; i < entries; ++i)
1165 __gmap_zap(gmap, cbrlo[i]);
1166 up_read(&gmap->mm->mmap_sem);
1170 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
1172 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1176 return handle_ipte_interlock(vcpu);
1178 return handle_epsw(vcpu);
1180 return handle_essa(vcpu);
1182 return handle_pfmf(vcpu);
1188 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
1190 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1191 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1192 int reg, rc, nr_regs;
1197 vcpu->stat.instruction_lctl++;
1199 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1200 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1202 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
1205 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1207 VCPU_EVENT(vcpu, 4, "LCTL: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1208 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
1210 nr_regs = ((reg3 - reg1) & 0xf) + 1;
1211 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
1213 return kvm_s390_inject_prog_cond(vcpu, rc);
1217 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
1218 vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
1221 reg = (reg + 1) % 16;
1223 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
1227 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
1229 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1230 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1231 int reg, rc, nr_regs;
1236 vcpu->stat.instruction_stctl++;
1238 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1239 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1241 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
1244 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1246 VCPU_EVENT(vcpu, 4, "STCTL r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1247 trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
1252 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
1255 reg = (reg + 1) % 16;
1257 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
1258 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
1261 static int handle_lctlg(struct kvm_vcpu *vcpu)
1263 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1264 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1265 int reg, rc, nr_regs;
1270 vcpu->stat.instruction_lctlg++;
1272 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1273 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1275 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
1278 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1280 VCPU_EVENT(vcpu, 4, "LCTLG: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1281 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
1283 nr_regs = ((reg3 - reg1) & 0xf) + 1;
1284 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
1286 return kvm_s390_inject_prog_cond(vcpu, rc);
1290 vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
1293 reg = (reg + 1) % 16;
1295 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
1299 static int handle_stctg(struct kvm_vcpu *vcpu)
1301 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1302 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1303 int reg, rc, nr_regs;
1308 vcpu->stat.instruction_stctg++;
1310 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1311 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1313 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
1316 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1318 VCPU_EVENT(vcpu, 4, "STCTG r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1319 trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
1324 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
1327 reg = (reg + 1) % 16;
1329 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
1330 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
1333 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
1335 switch (vcpu->arch.sie_block->ipb & 0x000000ff) {
1337 return handle_stctg(vcpu);
1339 return handle_lctlg(vcpu);
1343 return handle_ri(vcpu);
1349 static int handle_tprot(struct kvm_vcpu *vcpu)
1351 u64 address1, address2;
1352 unsigned long hva, gpa;
1353 int ret = 0, cc = 0;
1357 vcpu->stat.instruction_tprot++;
1359 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1360 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1362 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL);
1364 /* we only handle the Linux memory detection case:
1366 * everything else goes to userspace. */
1367 if (address2 & 0xf0)
1369 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1371 ret = guest_translate_address(vcpu, address1, ar, &gpa, GACC_STORE);
1372 if (ret == PGM_PROTECTION) {
1373 /* Write protected? Try again with read-only... */
1375 ret = guest_translate_address(vcpu, address1, ar, &gpa,
1379 if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
1380 ret = kvm_s390_inject_program_int(vcpu, ret);
1381 } else if (ret > 0) {
1382 /* Translation not available */
1383 kvm_s390_set_psw_cc(vcpu, 3);
1389 hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
1390 if (kvm_is_error_hva(hva)) {
1391 ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1394 cc = 1; /* Write not permitted ==> read-only */
1395 kvm_s390_set_psw_cc(vcpu, cc);
1396 /* Note: CC2 only occurs for storage keys (not supported yet) */
1399 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1404 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
1406 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1408 return handle_tprot(vcpu);
1414 static int handle_sckpf(struct kvm_vcpu *vcpu)
1418 vcpu->stat.instruction_sckpf++;
1420 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1421 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1423 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
1424 return kvm_s390_inject_program_int(vcpu,
1427 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
1428 vcpu->arch.sie_block->todpr = value;
1433 static int handle_ptff(struct kvm_vcpu *vcpu)
1435 vcpu->stat.instruction_ptff++;
1437 /* we don't emulate any control instructions yet */
1438 kvm_s390_set_psw_cc(vcpu, 3);
1442 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
1444 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1446 return handle_ptff(vcpu);
1448 return handle_sckpf(vcpu);