1 // SPDX-License-Identifier: GPL-2.0
3 * handling privileged instructions
5 * Copyright IBM Corp. 2008, 2020
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>
16 #include <linux/pgtable.h>
18 #include <asm/asm-offsets.h>
19 #include <asm/facility.h>
20 #include <asm/current.h>
21 #include <asm/debug.h>
22 #include <asm/ebcdic.h>
23 #include <asm/sysinfo.h>
24 #include <asm/page-states.h>
27 #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 mmap_read_lock(current->mm);
273 rc = get_guest_storage_key(current->mm, vmaddr, &key);
276 rc = fixup_user_fault(current->mm, vmaddr,
277 FAULT_FLAG_WRITE, &unlocked);
279 mmap_read_unlock(current->mm);
283 mmap_read_unlock(current->mm);
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 mmap_read_lock(current->mm);
320 rc = reset_guest_reference_bit(current->mm, vmaddr);
322 rc = fixup_user_fault(current->mm, vmaddr,
323 FAULT_FLAG_WRITE, &unlocked);
325 mmap_read_unlock(current->mm);
329 mmap_read_unlock(current->mm);
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 mmap_read_lock(current->mm);
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->mm, vmaddr,
394 FAULT_FLAG_WRITE, &unlocked);
395 rc = !rc ? -EAGAIN : rc;
397 mmap_read_unlock(current->mm);
399 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
405 if (m3 & (SSKE_MC | SSKE_MR)) {
407 /* skey in reg1 is unpredictable */
408 kvm_s390_set_psw_cc(vcpu, 3);
410 kvm_s390_set_psw_cc(vcpu, rc);
411 vcpu->run->s.regs.gprs[reg1] &= ~0xff00UL;
412 vcpu->run->s.regs.gprs[reg1] |= (u64) oldkey << 8;
416 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_64BIT)
417 vcpu->run->s.regs.gprs[reg2] &= ~PAGE_MASK;
419 vcpu->run->s.regs.gprs[reg2] &= ~0xfffff000UL;
420 end = kvm_s390_logical_to_effective(vcpu, end);
421 vcpu->run->s.regs.gprs[reg2] |= end;
426 static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
428 vcpu->stat.instruction_ipte_interlock++;
429 if (psw_bits(vcpu->arch.sie_block->gpsw).pstate)
430 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
431 wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
432 kvm_s390_retry_instr(vcpu);
433 VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
437 static int handle_test_block(struct kvm_vcpu *vcpu)
442 vcpu->stat.instruction_tb++;
444 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
445 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
447 kvm_s390_get_regs_rre(vcpu, NULL, ®2);
448 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
449 addr = kvm_s390_logical_to_effective(vcpu, addr);
450 if (kvm_s390_check_low_addr_prot_real(vcpu, addr))
451 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
452 addr = kvm_s390_real_to_abs(vcpu, addr);
454 if (kvm_is_error_gpa(vcpu->kvm, addr))
455 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
457 * We don't expect errors on modern systems, and do not care
458 * about storage keys (yet), so let's just clear the page.
460 if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
462 kvm_s390_set_psw_cc(vcpu, 0);
463 vcpu->run->s.regs.gprs[0] = 0;
467 static int handle_tpi(struct kvm_vcpu *vcpu)
469 struct kvm_s390_interrupt_info *inti;
476 vcpu->stat.instruction_tpi++;
478 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
480 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
482 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0);
484 kvm_s390_set_psw_cc(vcpu, 0);
488 tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
489 tpi_data[1] = inti->io.io_int_parm;
490 tpi_data[2] = inti->io.io_int_word;
493 * Store the two-word I/O interruption code into the
496 len = sizeof(tpi_data) - 4;
497 rc = write_guest(vcpu, addr, ar, &tpi_data, len);
499 rc = kvm_s390_inject_prog_cond(vcpu, rc);
500 goto reinject_interrupt;
504 * Store the three-word I/O interruption code into
505 * the appropriate lowcore area.
507 len = sizeof(tpi_data);
508 if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len)) {
509 /* failed writes to the low core are not recoverable */
511 goto reinject_interrupt;
515 /* irq was successfully handed to the guest */
517 kvm_s390_set_psw_cc(vcpu, 1);
521 * If we encounter a problem storing the interruption code, the
522 * instruction is suppressed from the guest's view: reinject the
525 if (kvm_s390_reinject_io_int(vcpu->kvm, inti)) {
529 /* don't set the cc, a pgm irq was injected or we drop to user space */
530 return rc ? -EFAULT : 0;
533 static int handle_tsch(struct kvm_vcpu *vcpu)
535 struct kvm_s390_interrupt_info *inti = NULL;
536 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
538 vcpu->stat.instruction_tsch++;
540 /* a valid schid has at least one bit set */
541 if (vcpu->run->s.regs.gprs[1])
542 inti = kvm_s390_get_io_int(vcpu->kvm, isc_mask,
543 vcpu->run->s.regs.gprs[1]);
546 * Prepare exit to userspace.
547 * We indicate whether we dequeued a pending I/O interrupt
548 * so that userspace can re-inject it if the instruction gets
549 * a program check. While this may re-order the pending I/O
550 * interrupts, this is no problem since the priority is kept
553 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
554 vcpu->run->s390_tsch.dequeued = !!inti;
556 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
557 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
558 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
559 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
561 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
566 static int handle_io_inst(struct kvm_vcpu *vcpu)
568 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
570 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
571 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
573 if (vcpu->kvm->arch.css_support) {
575 * Most I/O instructions will be handled by userspace.
576 * Exceptions are tpi and the interrupt portion of tsch.
578 if (vcpu->arch.sie_block->ipa == 0xb236)
579 return handle_tpi(vcpu);
580 if (vcpu->arch.sie_block->ipa == 0xb235)
581 return handle_tsch(vcpu);
582 /* Handle in userspace. */
583 vcpu->stat.instruction_io_other++;
587 * Set condition code 3 to stop the guest from issuing channel
590 kvm_s390_set_psw_cc(vcpu, 3);
596 * handle_pqap: Handling pqap interception
597 * @vcpu: the vcpu having issue the pqap instruction
599 * We now support PQAP/AQIC instructions and we need to correctly
600 * answer the guest even if no dedicated driver's hook is available.
602 * The intercepting code calls a dedicated callback for this instruction
603 * if a driver did register one in the CRYPTO satellite of the
606 * If no callback is available, the queues are not available, return this
607 * response code to the caller and set CC to 3.
608 * Else return the response code returned by the callback.
610 static int handle_pqap(struct kvm_vcpu *vcpu)
612 struct ap_queue_status status = {};
617 /* Verify that the AP instruction are available */
618 if (!ap_instructions_available())
620 /* Verify that the guest is allowed to use AP instructions */
621 if (!(vcpu->arch.sie_block->eca & ECA_APIE))
624 * The only possibly intercepted functions when AP instructions are
625 * available for the guest are AQIC and TAPQ with the t bit set
626 * since we do not set IC.3 (FIII) we currently will only intercept
627 * the AQIC function code.
628 * Note: running nested under z/VM can result in intercepts for other
629 * function codes, e.g. PQAP(QCI). We do not support this and bail out.
631 reg0 = vcpu->run->s.regs.gprs[0];
632 fc = (reg0 >> 24) & 0xff;
636 /* PQAP instruction is allowed for guest kernel only */
637 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
638 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
640 /* Common PQAP instruction specification exceptions */
641 /* bits 41-47 must all be zeros */
642 if (reg0 & 0x007f0000UL)
643 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
644 /* APFT not install and T bit set */
645 if (!test_kvm_facility(vcpu->kvm, 15) && (reg0 & 0x00800000UL))
646 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
647 /* APXA not installed and APID greater 64 or APQI greater 16 */
648 if (!(vcpu->kvm->arch.crypto.crycbd & 0x02) && (reg0 & 0x0000c0f0UL))
649 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
651 /* AQIC function code specific exception */
652 /* facility 65 not present for AQIC function code */
653 if (!test_kvm_facility(vcpu->kvm, 65))
654 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
657 * Verify that the hook callback is registered, lock the owner
660 if (vcpu->kvm->arch.crypto.pqap_hook) {
661 if (!try_module_get(vcpu->kvm->arch.crypto.pqap_hook->owner))
663 ret = vcpu->kvm->arch.crypto.pqap_hook->hook(vcpu);
664 module_put(vcpu->kvm->arch.crypto.pqap_hook->owner);
665 if (!ret && vcpu->run->s.regs.gprs[1] & 0x00ff0000)
666 kvm_s390_set_psw_cc(vcpu, 3);
670 * A vfio_driver must register a hook.
671 * No hook means no driver to enable the SIE CRYCB and no queues.
672 * We send this response to the guest.
674 status.response_code = 0x01;
675 memcpy(&vcpu->run->s.regs.gprs[1], &status, sizeof(status));
676 kvm_s390_set_psw_cc(vcpu, 3);
680 static int handle_stfl(struct kvm_vcpu *vcpu)
685 vcpu->stat.instruction_stfl++;
687 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
688 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
691 * We need to shift the lower 32 facility bits (bit 0-31) from a u64
692 * into a u32 memory representation. They will remain bits 0-31.
694 fac = *vcpu->kvm->arch.model.fac_list >> 32;
695 rc = write_guest_lc(vcpu, offsetof(struct lowcore, stfl_fac_list),
699 VCPU_EVENT(vcpu, 3, "STFL: store facility list 0x%x", fac);
700 trace_kvm_s390_handle_stfl(vcpu, fac);
704 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
705 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
706 #define PSW_ADDR_24 0x0000000000ffffffUL
707 #define PSW_ADDR_31 0x000000007fffffffUL
709 int is_valid_psw(psw_t *psw)
711 if (psw->mask & PSW_MASK_UNASSIGNED)
713 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
714 if (psw->addr & ~PSW_ADDR_31)
717 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
719 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
726 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
728 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
729 psw_compat_t new_psw;
734 vcpu->stat.instruction_lpsw++;
736 if (gpsw->mask & PSW_MASK_PSTATE)
737 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
739 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
741 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
743 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
745 return kvm_s390_inject_prog_cond(vcpu, rc);
746 if (!(new_psw.mask & PSW32_MASK_BASE))
747 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
748 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
749 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
750 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
751 if (!is_valid_psw(gpsw))
752 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
756 static int handle_lpswe(struct kvm_vcpu *vcpu)
763 vcpu->stat.instruction_lpswe++;
765 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
766 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
768 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
770 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
771 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
773 return kvm_s390_inject_prog_cond(vcpu, rc);
774 vcpu->arch.sie_block->gpsw = new_psw;
775 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
776 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
780 static int handle_stidp(struct kvm_vcpu *vcpu)
782 u64 stidp_data = vcpu->kvm->arch.model.cpuid;
787 vcpu->stat.instruction_stidp++;
789 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
790 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
792 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
795 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
797 rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data));
799 return kvm_s390_inject_prog_cond(vcpu, rc);
801 VCPU_EVENT(vcpu, 3, "STIDP: store cpu id 0x%llx", stidp_data);
805 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
810 cpus = atomic_read(&vcpu->kvm->online_vcpus);
812 /* deal with other level 3 hypervisors */
813 if (stsi(mem, 3, 2, 2))
817 for (n = mem->count - 1; n > 0 ; n--)
818 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
820 memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
821 mem->vm[0].cpus_total = cpus;
822 mem->vm[0].cpus_configured = cpus;
823 mem->vm[0].cpus_standby = 0;
824 mem->vm[0].cpus_reserved = 0;
825 mem->vm[0].caf = 1000;
826 memcpy(mem->vm[0].name, "KVMguest", 8);
827 ASCEBC(mem->vm[0].name, 8);
828 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
829 ASCEBC(mem->vm[0].cpi, 16);
832 static void insert_stsi_usr_data(struct kvm_vcpu *vcpu, u64 addr, u8 ar,
833 u8 fc, u8 sel1, u16 sel2)
835 vcpu->run->exit_reason = KVM_EXIT_S390_STSI;
836 vcpu->run->s390_stsi.addr = addr;
837 vcpu->run->s390_stsi.ar = ar;
838 vcpu->run->s390_stsi.fc = fc;
839 vcpu->run->s390_stsi.sel1 = sel1;
840 vcpu->run->s390_stsi.sel2 = sel2;
843 static int handle_stsi(struct kvm_vcpu *vcpu)
845 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
846 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
847 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
848 unsigned long mem = 0;
853 vcpu->stat.instruction_stsi++;
854 VCPU_EVENT(vcpu, 3, "STSI: fc: %u sel1: %u sel2: %u", fc, sel1, sel2);
856 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
857 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
860 kvm_s390_set_psw_cc(vcpu, 3);
864 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
865 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
866 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
869 vcpu->run->s.regs.gprs[0] = 3 << 28;
870 kvm_s390_set_psw_cc(vcpu, 0);
874 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
876 if (!kvm_s390_pv_cpu_is_protected(vcpu) && (operand2 & 0xfff))
877 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
880 case 1: /* same handling for 1 and 2 */
882 mem = get_zeroed_page(GFP_KERNEL_ACCOUNT);
885 if (stsi((void *) mem, fc, sel1, sel2))
889 if (sel1 != 2 || sel2 != 2)
891 mem = get_zeroed_page(GFP_KERNEL_ACCOUNT);
894 handle_stsi_3_2_2(vcpu, (void *) mem);
897 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
898 memcpy((void *)sida_origin(vcpu->arch.sie_block), (void *)mem,
902 rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE);
905 rc = kvm_s390_inject_prog_cond(vcpu, rc);
908 if (vcpu->kvm->arch.user_stsi) {
909 insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2);
912 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
914 kvm_s390_set_psw_cc(vcpu, 0);
915 vcpu->run->s.regs.gprs[0] = 0;
918 kvm_s390_set_psw_cc(vcpu, 3);
924 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
926 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
928 return handle_stidp(vcpu);
930 return handle_set_clock(vcpu);
932 return handle_set_prefix(vcpu);
934 return handle_store_prefix(vcpu);
936 return handle_store_cpu_address(vcpu);
938 return kvm_s390_handle_vsie(vcpu);
941 return handle_ipte_interlock(vcpu);
943 return handle_iske(vcpu);
945 return handle_rrbe(vcpu);
947 return handle_sske(vcpu);
949 return handle_test_block(vcpu);
966 return handle_io_inst(vcpu);
968 return handle_sthyi(vcpu);
970 return handle_stsi(vcpu);
972 return handle_pqap(vcpu);
974 return handle_stfl(vcpu);
976 return handle_lpswe(vcpu);
982 static int handle_epsw(struct kvm_vcpu *vcpu)
986 vcpu->stat.instruction_epsw++;
988 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
990 /* This basically extracts the mask half of the psw. */
991 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
992 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
994 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
995 vcpu->run->s.regs.gprs[reg2] |=
996 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
1001 #define PFMF_RESERVED 0xfffc0101UL
1002 #define PFMF_SK 0x00020000UL
1003 #define PFMF_CF 0x00010000UL
1004 #define PFMF_UI 0x00008000UL
1005 #define PFMF_FSC 0x00007000UL
1006 #define PFMF_NQ 0x00000800UL
1007 #define PFMF_MR 0x00000400UL
1008 #define PFMF_MC 0x00000200UL
1009 #define PFMF_KEY 0x000000feUL
1011 static int handle_pfmf(struct kvm_vcpu *vcpu)
1013 bool mr = false, mc = false, nq;
1015 unsigned long start, end;
1018 vcpu->stat.instruction_pfmf++;
1020 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
1022 if (!test_kvm_facility(vcpu->kvm, 8))
1023 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
1025 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1026 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1028 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
1029 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1031 /* Only provide non-quiescing support if enabled for the guest */
1032 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
1033 !test_kvm_facility(vcpu->kvm, 14))
1034 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1036 /* Only provide conditional-SSKE support if enabled for the guest */
1037 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK &&
1038 test_kvm_facility(vcpu->kvm, 10)) {
1039 mr = vcpu->run->s.regs.gprs[reg1] & PFMF_MR;
1040 mc = vcpu->run->s.regs.gprs[reg1] & PFMF_MC;
1043 nq = vcpu->run->s.regs.gprs[reg1] & PFMF_NQ;
1044 key = vcpu->run->s.regs.gprs[reg1] & PFMF_KEY;
1045 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
1046 start = kvm_s390_logical_to_effective(vcpu, start);
1048 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
1049 if (kvm_s390_check_low_addr_prot_real(vcpu, start))
1050 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
1053 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
1055 /* only 4k frames specify a real address */
1056 start = kvm_s390_real_to_abs(vcpu, start);
1057 end = (start + PAGE_SIZE) & ~(PAGE_SIZE - 1);
1060 end = (start + _SEGMENT_SIZE) & ~(_SEGMENT_SIZE - 1);
1063 /* only support 2G frame size if EDAT2 is available and we are
1064 not in 24-bit addressing mode */
1065 if (!test_kvm_facility(vcpu->kvm, 78) ||
1066 psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_24BIT)
1067 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1068 end = (start + _REGION3_SIZE) & ~(_REGION3_SIZE - 1);
1071 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1074 while (start != end) {
1075 unsigned long vmaddr;
1076 bool unlocked = false;
1078 /* Translate guest address to host address */
1079 vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
1080 if (kvm_is_error_hva(vmaddr))
1081 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1083 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
1084 if (kvm_clear_guest(vcpu->kvm, start, PAGE_SIZE))
1085 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1088 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
1089 int rc = kvm_s390_skey_check_enable(vcpu);
1093 mmap_read_lock(current->mm);
1094 rc = cond_set_guest_storage_key(current->mm, vmaddr,
1095 key, NULL, nq, mr, mc);
1097 rc = fixup_user_fault(current->mm, vmaddr,
1098 FAULT_FLAG_WRITE, &unlocked);
1099 rc = !rc ? -EAGAIN : rc;
1101 mmap_read_unlock(current->mm);
1103 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1111 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
1112 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_64BIT) {
1113 vcpu->run->s.regs.gprs[reg2] = end;
1115 vcpu->run->s.regs.gprs[reg2] &= ~0xffffffffUL;
1116 end = kvm_s390_logical_to_effective(vcpu, end);
1117 vcpu->run->s.regs.gprs[reg2] |= end;
1124 * Must be called with relevant read locks held (kvm->mm->mmap_lock, kvm->srcu)
1126 static inline int __do_essa(struct kvm_vcpu *vcpu, const int orc)
1128 int r1, r2, nappended, entries;
1129 unsigned long gfn, hva, res, pgstev, ptev;
1130 unsigned long *cbrlo;
1133 * We don't need to set SD.FPF.SK to 1 here, because if we have a
1134 * machine check here we either handle it or crash
1137 kvm_s390_get_regs_rre(vcpu, &r1, &r2);
1138 gfn = vcpu->run->s.regs.gprs[r2] >> PAGE_SHIFT;
1139 hva = gfn_to_hva(vcpu->kvm, gfn);
1140 entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
1142 if (kvm_is_error_hva(hva))
1143 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1145 nappended = pgste_perform_essa(vcpu->kvm->mm, hva, orc, &ptev, &pgstev);
1146 if (nappended < 0) {
1147 res = orc ? 0x10 : 0;
1148 vcpu->run->s.regs.gprs[r1] = res; /* Exception Indication */
1151 res = (pgstev & _PGSTE_GPS_USAGE_MASK) >> 22;
1153 * Set the block-content state part of the result. 0 means resident, so
1154 * nothing to do if the page is valid. 2 is for preserved pages
1155 * (non-present and non-zero), and 3 for zero pages (non-present and
1158 if (ptev & _PAGE_INVALID) {
1160 if (pgstev & _PGSTE_GPS_ZERO)
1163 if (pgstev & _PGSTE_GPS_NODAT)
1165 vcpu->run->s.regs.gprs[r1] = res;
1167 * It is possible that all the normal 511 slots were full, in which case
1168 * we will now write in the 512th slot, which is reserved for host use.
1169 * In both cases we let the normal essa handling code process all the
1170 * slots, including the reserved one, if needed.
1172 if (nappended > 0) {
1173 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo & PAGE_MASK);
1174 cbrlo[entries] = gfn << PAGE_SHIFT;
1178 struct kvm_memory_slot *ms = gfn_to_memslot(vcpu->kvm, gfn);
1180 /* Increment only if we are really flipping the bit */
1181 if (ms && !test_and_set_bit(gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms)))
1182 atomic64_inc(&vcpu->kvm->arch.cmma_dirty_pages);
1188 static int handle_essa(struct kvm_vcpu *vcpu)
1190 /* entries expected to be 1FF */
1191 int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
1192 unsigned long *cbrlo;
1196 VCPU_EVENT(vcpu, 4, "ESSA: release %d pages", entries);
1197 gmap = vcpu->arch.gmap;
1198 vcpu->stat.instruction_essa++;
1199 if (!vcpu->kvm->arch.use_cmma)
1200 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
1202 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1203 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1204 /* Check for invalid operation request code */
1205 orc = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
1206 /* ORCs 0-6 are always valid */
1207 if (orc > (test_kvm_facility(vcpu->kvm, 147) ? ESSA_SET_STABLE_NODAT
1208 : ESSA_SET_STABLE_IF_RESIDENT))
1209 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1211 if (!vcpu->kvm->arch.migration_mode) {
1213 * CMMA is enabled in the KVM settings, but is disabled in
1214 * the SIE block and in the mm_context, and we are not doing
1215 * a migration. Enable CMMA in the mm_context.
1216 * Since we need to take a write lock to write to the context
1217 * to avoid races with storage keys handling, we check if the
1218 * value really needs to be written to; if the value is
1219 * already correct, we do nothing and avoid the lock.
1221 if (vcpu->kvm->mm->context.uses_cmm == 0) {
1222 mmap_write_lock(vcpu->kvm->mm);
1223 vcpu->kvm->mm->context.uses_cmm = 1;
1224 mmap_write_unlock(vcpu->kvm->mm);
1227 * If we are here, we are supposed to have CMMA enabled in
1228 * the SIE block. Enabling CMMA works on a per-CPU basis,
1229 * while the context use_cmma flag is per process.
1230 * It's possible that the context flag is enabled and the
1231 * SIE flag is not, so we set the flag always; if it was
1232 * already set, nothing changes, otherwise we enable it
1235 vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
1236 /* Retry the ESSA instruction */
1237 kvm_s390_retry_instr(vcpu);
1241 mmap_read_lock(vcpu->kvm->mm);
1242 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1243 i = __do_essa(vcpu, orc);
1244 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
1245 mmap_read_unlock(vcpu->kvm->mm);
1248 /* Account for the possible extra cbrl entry */
1251 vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
1252 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
1253 mmap_read_lock(gmap->mm);
1254 for (i = 0; i < entries; ++i)
1255 __gmap_zap(gmap, cbrlo[i]);
1256 mmap_read_unlock(gmap->mm);
1260 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
1262 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1266 return handle_ipte_interlock(vcpu);
1268 return handle_epsw(vcpu);
1270 return handle_essa(vcpu);
1272 return handle_pfmf(vcpu);
1278 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
1280 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1281 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1282 int reg, rc, nr_regs;
1287 vcpu->stat.instruction_lctl++;
1289 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1290 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1292 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
1295 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1297 VCPU_EVENT(vcpu, 4, "LCTL: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1298 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
1300 nr_regs = ((reg3 - reg1) & 0xf) + 1;
1301 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
1303 return kvm_s390_inject_prog_cond(vcpu, rc);
1307 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
1308 vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
1311 reg = (reg + 1) % 16;
1313 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
1317 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
1319 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1320 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1321 int reg, rc, nr_regs;
1326 vcpu->stat.instruction_stctl++;
1328 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1329 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1331 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
1334 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1336 VCPU_EVENT(vcpu, 4, "STCTL r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1337 trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
1342 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
1345 reg = (reg + 1) % 16;
1347 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
1348 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
1351 static int handle_lctlg(struct kvm_vcpu *vcpu)
1353 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1354 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1355 int reg, rc, nr_regs;
1360 vcpu->stat.instruction_lctlg++;
1362 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1363 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1365 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
1368 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1370 VCPU_EVENT(vcpu, 4, "LCTLG: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1371 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
1373 nr_regs = ((reg3 - reg1) & 0xf) + 1;
1374 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
1376 return kvm_s390_inject_prog_cond(vcpu, rc);
1380 vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
1383 reg = (reg + 1) % 16;
1385 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
1389 static int handle_stctg(struct kvm_vcpu *vcpu)
1391 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1392 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1393 int reg, rc, nr_regs;
1398 vcpu->stat.instruction_stctg++;
1400 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1401 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1403 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
1406 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1408 VCPU_EVENT(vcpu, 4, "STCTG r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1409 trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
1414 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
1417 reg = (reg + 1) % 16;
1419 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
1420 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
1423 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
1425 switch (vcpu->arch.sie_block->ipb & 0x000000ff) {
1427 return handle_stctg(vcpu);
1429 return handle_lctlg(vcpu);
1433 return handle_ri(vcpu);
1439 static int handle_tprot(struct kvm_vcpu *vcpu)
1441 u64 address1, address2;
1442 unsigned long hva, gpa;
1443 int ret = 0, cc = 0;
1447 vcpu->stat.instruction_tprot++;
1449 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1450 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1452 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL);
1454 /* we only handle the Linux memory detection case:
1456 * everything else goes to userspace. */
1457 if (address2 & 0xf0)
1459 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1461 ret = guest_translate_address(vcpu, address1, ar, &gpa, GACC_STORE);
1462 if (ret == PGM_PROTECTION) {
1463 /* Write protected? Try again with read-only... */
1465 ret = guest_translate_address(vcpu, address1, ar, &gpa,
1469 if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
1470 ret = kvm_s390_inject_program_int(vcpu, ret);
1471 } else if (ret > 0) {
1472 /* Translation not available */
1473 kvm_s390_set_psw_cc(vcpu, 3);
1479 hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
1480 if (kvm_is_error_hva(hva)) {
1481 ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1484 cc = 1; /* Write not permitted ==> read-only */
1485 kvm_s390_set_psw_cc(vcpu, cc);
1486 /* Note: CC2 only occurs for storage keys (not supported yet) */
1489 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1494 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
1496 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1498 return handle_tprot(vcpu);
1504 static int handle_sckpf(struct kvm_vcpu *vcpu)
1508 vcpu->stat.instruction_sckpf++;
1510 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1511 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1513 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
1514 return kvm_s390_inject_program_int(vcpu,
1517 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
1518 vcpu->arch.sie_block->todpr = value;
1523 static int handle_ptff(struct kvm_vcpu *vcpu)
1525 vcpu->stat.instruction_ptff++;
1527 /* we don't emulate any control instructions yet */
1528 kvm_s390_set_psw_cc(vcpu, 3);
1532 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
1534 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1536 return handle_ptff(vcpu);
1538 return handle_sckpf(vcpu);