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 = {};
613 crypto_hook pqap_hook;
618 /* Verify that the AP instruction are available */
619 if (!ap_instructions_available())
621 /* Verify that the guest is allowed to use AP instructions */
622 if (!(vcpu->arch.sie_block->eca & ECA_APIE))
625 * The only possibly intercepted functions when AP instructions are
626 * available for the guest are AQIC and TAPQ with the t bit set
627 * since we do not set IC.3 (FIII) we currently will only intercept
628 * the AQIC function code.
629 * Note: running nested under z/VM can result in intercepts for other
630 * function codes, e.g. PQAP(QCI). We do not support this and bail out.
632 reg0 = vcpu->run->s.regs.gprs[0];
633 fc = (reg0 >> 24) & 0xff;
637 /* PQAP instruction is allowed for guest kernel only */
638 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
639 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
641 /* Common PQAP instruction specification exceptions */
642 /* bits 41-47 must all be zeros */
643 if (reg0 & 0x007f0000UL)
644 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
645 /* APFT not install and T bit set */
646 if (!test_kvm_facility(vcpu->kvm, 15) && (reg0 & 0x00800000UL))
647 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
648 /* APXA not installed and APID greater 64 or APQI greater 16 */
649 if (!(vcpu->kvm->arch.crypto.crycbd & 0x02) && (reg0 & 0x0000c0f0UL))
650 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
652 /* AQIC function code specific exception */
653 /* facility 65 not present for AQIC function code */
654 if (!test_kvm_facility(vcpu->kvm, 65))
655 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
658 * If the hook callback is registered, there will be a pointer to the
659 * hook function pointer in the kvm_s390_crypto structure. Lock the
660 * owner, retrieve the hook function pointer and call the hook.
662 down_read(&vcpu->kvm->arch.crypto.pqap_hook_rwsem);
663 if (vcpu->kvm->arch.crypto.pqap_hook) {
664 pqap_hook = *vcpu->kvm->arch.crypto.pqap_hook;
665 ret = pqap_hook(vcpu);
666 if (!ret && vcpu->run->s.regs.gprs[1] & 0x00ff0000)
667 kvm_s390_set_psw_cc(vcpu, 3);
668 up_read(&vcpu->kvm->arch.crypto.pqap_hook_rwsem);
671 up_read(&vcpu->kvm->arch.crypto.pqap_hook_rwsem);
673 * A vfio_driver must register a hook.
674 * No hook means no driver to enable the SIE CRYCB and no queues.
675 * We send this response to the guest.
677 status.response_code = 0x01;
678 memcpy(&vcpu->run->s.regs.gprs[1], &status, sizeof(status));
679 kvm_s390_set_psw_cc(vcpu, 3);
683 static int handle_stfl(struct kvm_vcpu *vcpu)
688 vcpu->stat.instruction_stfl++;
690 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
691 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
694 * We need to shift the lower 32 facility bits (bit 0-31) from a u64
695 * into a u32 memory representation. They will remain bits 0-31.
697 fac = *vcpu->kvm->arch.model.fac_list >> 32;
698 rc = write_guest_lc(vcpu, offsetof(struct lowcore, stfl_fac_list),
702 VCPU_EVENT(vcpu, 3, "STFL: store facility list 0x%x", fac);
703 trace_kvm_s390_handle_stfl(vcpu, fac);
707 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
708 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
709 #define PSW_ADDR_24 0x0000000000ffffffUL
710 #define PSW_ADDR_31 0x000000007fffffffUL
712 int is_valid_psw(psw_t *psw)
714 if (psw->mask & PSW_MASK_UNASSIGNED)
716 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
717 if (psw->addr & ~PSW_ADDR_31)
720 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
722 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
729 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
731 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
732 psw_compat_t new_psw;
737 vcpu->stat.instruction_lpsw++;
739 if (gpsw->mask & PSW_MASK_PSTATE)
740 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
742 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
744 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
746 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
748 return kvm_s390_inject_prog_cond(vcpu, rc);
749 if (!(new_psw.mask & PSW32_MASK_BASE))
750 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
751 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
752 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
753 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
754 if (!is_valid_psw(gpsw))
755 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
759 static int handle_lpswe(struct kvm_vcpu *vcpu)
766 vcpu->stat.instruction_lpswe++;
768 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
769 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
771 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
773 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
774 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
776 return kvm_s390_inject_prog_cond(vcpu, rc);
777 vcpu->arch.sie_block->gpsw = new_psw;
778 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
779 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
783 static int handle_stidp(struct kvm_vcpu *vcpu)
785 u64 stidp_data = vcpu->kvm->arch.model.cpuid;
790 vcpu->stat.instruction_stidp++;
792 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
793 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
795 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
798 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
800 rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data));
802 return kvm_s390_inject_prog_cond(vcpu, rc);
804 VCPU_EVENT(vcpu, 3, "STIDP: store cpu id 0x%llx", stidp_data);
808 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
813 cpus = atomic_read(&vcpu->kvm->online_vcpus);
815 /* deal with other level 3 hypervisors */
816 if (stsi(mem, 3, 2, 2))
820 for (n = mem->count - 1; n > 0 ; n--)
821 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
823 memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
824 mem->vm[0].cpus_total = cpus;
825 mem->vm[0].cpus_configured = cpus;
826 mem->vm[0].cpus_standby = 0;
827 mem->vm[0].cpus_reserved = 0;
828 mem->vm[0].caf = 1000;
829 memcpy(mem->vm[0].name, "KVMguest", 8);
830 ASCEBC(mem->vm[0].name, 8);
831 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
832 ASCEBC(mem->vm[0].cpi, 16);
835 static void insert_stsi_usr_data(struct kvm_vcpu *vcpu, u64 addr, u8 ar,
836 u8 fc, u8 sel1, u16 sel2)
838 vcpu->run->exit_reason = KVM_EXIT_S390_STSI;
839 vcpu->run->s390_stsi.addr = addr;
840 vcpu->run->s390_stsi.ar = ar;
841 vcpu->run->s390_stsi.fc = fc;
842 vcpu->run->s390_stsi.sel1 = sel1;
843 vcpu->run->s390_stsi.sel2 = sel2;
846 static int handle_stsi(struct kvm_vcpu *vcpu)
848 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
849 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
850 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
851 unsigned long mem = 0;
856 vcpu->stat.instruction_stsi++;
857 VCPU_EVENT(vcpu, 3, "STSI: fc: %u sel1: %u sel2: %u", fc, sel1, sel2);
859 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
860 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
863 kvm_s390_set_psw_cc(vcpu, 3);
867 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
868 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
869 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
872 vcpu->run->s.regs.gprs[0] = 3 << 28;
873 kvm_s390_set_psw_cc(vcpu, 0);
877 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
879 if (!kvm_s390_pv_cpu_is_protected(vcpu) && (operand2 & 0xfff))
880 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
883 case 1: /* same handling for 1 and 2 */
885 mem = get_zeroed_page(GFP_KERNEL_ACCOUNT);
888 if (stsi((void *) mem, fc, sel1, sel2))
892 if (sel1 != 2 || sel2 != 2)
894 mem = get_zeroed_page(GFP_KERNEL_ACCOUNT);
897 handle_stsi_3_2_2(vcpu, (void *) mem);
900 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
901 memcpy((void *)sida_origin(vcpu->arch.sie_block), (void *)mem,
905 rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE);
908 rc = kvm_s390_inject_prog_cond(vcpu, rc);
911 if (vcpu->kvm->arch.user_stsi) {
912 insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2);
915 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
917 kvm_s390_set_psw_cc(vcpu, 0);
918 vcpu->run->s.regs.gprs[0] = 0;
921 kvm_s390_set_psw_cc(vcpu, 3);
927 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
929 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
931 return handle_stidp(vcpu);
933 return handle_set_clock(vcpu);
935 return handle_set_prefix(vcpu);
937 return handle_store_prefix(vcpu);
939 return handle_store_cpu_address(vcpu);
941 return kvm_s390_handle_vsie(vcpu);
944 return handle_ipte_interlock(vcpu);
946 return handle_iske(vcpu);
948 return handle_rrbe(vcpu);
950 return handle_sske(vcpu);
952 return handle_test_block(vcpu);
969 return handle_io_inst(vcpu);
971 return handle_sthyi(vcpu);
973 return handle_stsi(vcpu);
975 return handle_pqap(vcpu);
977 return handle_stfl(vcpu);
979 return handle_lpswe(vcpu);
985 static int handle_epsw(struct kvm_vcpu *vcpu)
989 vcpu->stat.instruction_epsw++;
991 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
993 /* This basically extracts the mask half of the psw. */
994 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
995 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
997 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
998 vcpu->run->s.regs.gprs[reg2] |=
999 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
1004 #define PFMF_RESERVED 0xfffc0101UL
1005 #define PFMF_SK 0x00020000UL
1006 #define PFMF_CF 0x00010000UL
1007 #define PFMF_UI 0x00008000UL
1008 #define PFMF_FSC 0x00007000UL
1009 #define PFMF_NQ 0x00000800UL
1010 #define PFMF_MR 0x00000400UL
1011 #define PFMF_MC 0x00000200UL
1012 #define PFMF_KEY 0x000000feUL
1014 static int handle_pfmf(struct kvm_vcpu *vcpu)
1016 bool mr = false, mc = false, nq;
1018 unsigned long start, end;
1021 vcpu->stat.instruction_pfmf++;
1023 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
1025 if (!test_kvm_facility(vcpu->kvm, 8))
1026 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
1028 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1029 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1031 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
1032 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1034 /* Only provide non-quiescing support if enabled for the guest */
1035 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
1036 !test_kvm_facility(vcpu->kvm, 14))
1037 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1039 /* Only provide conditional-SSKE support if enabled for the guest */
1040 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK &&
1041 test_kvm_facility(vcpu->kvm, 10)) {
1042 mr = vcpu->run->s.regs.gprs[reg1] & PFMF_MR;
1043 mc = vcpu->run->s.regs.gprs[reg1] & PFMF_MC;
1046 nq = vcpu->run->s.regs.gprs[reg1] & PFMF_NQ;
1047 key = vcpu->run->s.regs.gprs[reg1] & PFMF_KEY;
1048 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
1049 start = kvm_s390_logical_to_effective(vcpu, start);
1051 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
1052 if (kvm_s390_check_low_addr_prot_real(vcpu, start))
1053 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
1056 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
1058 /* only 4k frames specify a real address */
1059 start = kvm_s390_real_to_abs(vcpu, start);
1060 end = (start + PAGE_SIZE) & ~(PAGE_SIZE - 1);
1063 end = (start + _SEGMENT_SIZE) & ~(_SEGMENT_SIZE - 1);
1066 /* only support 2G frame size if EDAT2 is available and we are
1067 not in 24-bit addressing mode */
1068 if (!test_kvm_facility(vcpu->kvm, 78) ||
1069 psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_24BIT)
1070 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1071 end = (start + _REGION3_SIZE) & ~(_REGION3_SIZE - 1);
1074 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1077 while (start != end) {
1078 unsigned long vmaddr;
1079 bool unlocked = false;
1081 /* Translate guest address to host address */
1082 vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
1083 if (kvm_is_error_hva(vmaddr))
1084 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1086 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
1087 if (kvm_clear_guest(vcpu->kvm, start, PAGE_SIZE))
1088 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1091 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
1092 int rc = kvm_s390_skey_check_enable(vcpu);
1096 mmap_read_lock(current->mm);
1097 rc = cond_set_guest_storage_key(current->mm, vmaddr,
1098 key, NULL, nq, mr, mc);
1100 rc = fixup_user_fault(current->mm, vmaddr,
1101 FAULT_FLAG_WRITE, &unlocked);
1102 rc = !rc ? -EAGAIN : rc;
1104 mmap_read_unlock(current->mm);
1106 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1114 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
1115 if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_64BIT) {
1116 vcpu->run->s.regs.gprs[reg2] = end;
1118 vcpu->run->s.regs.gprs[reg2] &= ~0xffffffffUL;
1119 end = kvm_s390_logical_to_effective(vcpu, end);
1120 vcpu->run->s.regs.gprs[reg2] |= end;
1127 * Must be called with relevant read locks held (kvm->mm->mmap_lock, kvm->srcu)
1129 static inline int __do_essa(struct kvm_vcpu *vcpu, const int orc)
1131 int r1, r2, nappended, entries;
1132 unsigned long gfn, hva, res, pgstev, ptev;
1133 unsigned long *cbrlo;
1136 * We don't need to set SD.FPF.SK to 1 here, because if we have a
1137 * machine check here we either handle it or crash
1140 kvm_s390_get_regs_rre(vcpu, &r1, &r2);
1141 gfn = vcpu->run->s.regs.gprs[r2] >> PAGE_SHIFT;
1142 hva = gfn_to_hva(vcpu->kvm, gfn);
1143 entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
1145 if (kvm_is_error_hva(hva))
1146 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1148 nappended = pgste_perform_essa(vcpu->kvm->mm, hva, orc, &ptev, &pgstev);
1149 if (nappended < 0) {
1150 res = orc ? 0x10 : 0;
1151 vcpu->run->s.regs.gprs[r1] = res; /* Exception Indication */
1154 res = (pgstev & _PGSTE_GPS_USAGE_MASK) >> 22;
1156 * Set the block-content state part of the result. 0 means resident, so
1157 * nothing to do if the page is valid. 2 is for preserved pages
1158 * (non-present and non-zero), and 3 for zero pages (non-present and
1161 if (ptev & _PAGE_INVALID) {
1163 if (pgstev & _PGSTE_GPS_ZERO)
1166 if (pgstev & _PGSTE_GPS_NODAT)
1168 vcpu->run->s.regs.gprs[r1] = res;
1170 * It is possible that all the normal 511 slots were full, in which case
1171 * we will now write in the 512th slot, which is reserved for host use.
1172 * In both cases we let the normal essa handling code process all the
1173 * slots, including the reserved one, if needed.
1175 if (nappended > 0) {
1176 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo & PAGE_MASK);
1177 cbrlo[entries] = gfn << PAGE_SHIFT;
1181 struct kvm_memory_slot *ms = gfn_to_memslot(vcpu->kvm, gfn);
1183 /* Increment only if we are really flipping the bit */
1184 if (ms && !test_and_set_bit(gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms)))
1185 atomic64_inc(&vcpu->kvm->arch.cmma_dirty_pages);
1191 static int handle_essa(struct kvm_vcpu *vcpu)
1193 /* entries expected to be 1FF */
1194 int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
1195 unsigned long *cbrlo;
1199 VCPU_EVENT(vcpu, 4, "ESSA: release %d pages", entries);
1200 gmap = vcpu->arch.gmap;
1201 vcpu->stat.instruction_essa++;
1202 if (!vcpu->kvm->arch.use_cmma)
1203 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
1205 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1206 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1207 /* Check for invalid operation request code */
1208 orc = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
1209 /* ORCs 0-6 are always valid */
1210 if (orc > (test_kvm_facility(vcpu->kvm, 147) ? ESSA_SET_STABLE_NODAT
1211 : ESSA_SET_STABLE_IF_RESIDENT))
1212 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1214 if (!vcpu->kvm->arch.migration_mode) {
1216 * CMMA is enabled in the KVM settings, but is disabled in
1217 * the SIE block and in the mm_context, and we are not doing
1218 * a migration. Enable CMMA in the mm_context.
1219 * Since we need to take a write lock to write to the context
1220 * to avoid races with storage keys handling, we check if the
1221 * value really needs to be written to; if the value is
1222 * already correct, we do nothing and avoid the lock.
1224 if (vcpu->kvm->mm->context.uses_cmm == 0) {
1225 mmap_write_lock(vcpu->kvm->mm);
1226 vcpu->kvm->mm->context.uses_cmm = 1;
1227 mmap_write_unlock(vcpu->kvm->mm);
1230 * If we are here, we are supposed to have CMMA enabled in
1231 * the SIE block. Enabling CMMA works on a per-CPU basis,
1232 * while the context use_cmma flag is per process.
1233 * It's possible that the context flag is enabled and the
1234 * SIE flag is not, so we set the flag always; if it was
1235 * already set, nothing changes, otherwise we enable it
1238 vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
1239 /* Retry the ESSA instruction */
1240 kvm_s390_retry_instr(vcpu);
1244 mmap_read_lock(vcpu->kvm->mm);
1245 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1246 i = __do_essa(vcpu, orc);
1247 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
1248 mmap_read_unlock(vcpu->kvm->mm);
1251 /* Account for the possible extra cbrl entry */
1254 vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
1255 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
1256 mmap_read_lock(gmap->mm);
1257 for (i = 0; i < entries; ++i)
1258 __gmap_zap(gmap, cbrlo[i]);
1259 mmap_read_unlock(gmap->mm);
1263 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
1265 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1269 return handle_ipte_interlock(vcpu);
1271 return handle_epsw(vcpu);
1273 return handle_essa(vcpu);
1275 return handle_pfmf(vcpu);
1281 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
1283 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1284 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1285 int reg, rc, nr_regs;
1290 vcpu->stat.instruction_lctl++;
1292 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1293 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1295 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
1298 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1300 VCPU_EVENT(vcpu, 4, "LCTL: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1301 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
1303 nr_regs = ((reg3 - reg1) & 0xf) + 1;
1304 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
1306 return kvm_s390_inject_prog_cond(vcpu, rc);
1310 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
1311 vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
1314 reg = (reg + 1) % 16;
1316 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
1320 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
1322 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1323 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1324 int reg, rc, nr_regs;
1329 vcpu->stat.instruction_stctl++;
1331 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1332 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1334 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
1337 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1339 VCPU_EVENT(vcpu, 4, "STCTL r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1340 trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
1345 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
1348 reg = (reg + 1) % 16;
1350 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
1351 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
1354 static int handle_lctlg(struct kvm_vcpu *vcpu)
1356 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1357 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1358 int reg, rc, nr_regs;
1363 vcpu->stat.instruction_lctlg++;
1365 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1366 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1368 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
1371 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1373 VCPU_EVENT(vcpu, 4, "LCTLG: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1374 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
1376 nr_regs = ((reg3 - reg1) & 0xf) + 1;
1377 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
1379 return kvm_s390_inject_prog_cond(vcpu, rc);
1383 vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
1386 reg = (reg + 1) % 16;
1388 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
1392 static int handle_stctg(struct kvm_vcpu *vcpu)
1394 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
1395 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1396 int reg, rc, nr_regs;
1401 vcpu->stat.instruction_stctg++;
1403 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1404 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1406 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
1409 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
1411 VCPU_EVENT(vcpu, 4, "STCTG r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1412 trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
1417 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
1420 reg = (reg + 1) % 16;
1422 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
1423 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
1426 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
1428 switch (vcpu->arch.sie_block->ipb & 0x000000ff) {
1430 return handle_stctg(vcpu);
1432 return handle_lctlg(vcpu);
1436 return handle_ri(vcpu);
1442 static int handle_tprot(struct kvm_vcpu *vcpu)
1444 u64 address1, address2;
1445 unsigned long hva, gpa;
1446 int ret = 0, cc = 0;
1450 vcpu->stat.instruction_tprot++;
1452 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1453 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1455 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL);
1457 /* we only handle the Linux memory detection case:
1459 * everything else goes to userspace. */
1460 if (address2 & 0xf0)
1462 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1464 ret = guest_translate_address(vcpu, address1, ar, &gpa, GACC_STORE);
1465 if (ret == PGM_PROTECTION) {
1466 /* Write protected? Try again with read-only... */
1468 ret = guest_translate_address(vcpu, address1, ar, &gpa,
1472 if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
1473 ret = kvm_s390_inject_program_int(vcpu, ret);
1474 } else if (ret > 0) {
1475 /* Translation not available */
1476 kvm_s390_set_psw_cc(vcpu, 3);
1482 hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
1483 if (kvm_is_error_hva(hva)) {
1484 ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1487 cc = 1; /* Write not permitted ==> read-only */
1488 kvm_s390_set_psw_cc(vcpu, cc);
1489 /* Note: CC2 only occurs for storage keys (not supported yet) */
1492 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1497 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
1499 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1501 return handle_tprot(vcpu);
1507 static int handle_sckpf(struct kvm_vcpu *vcpu)
1511 vcpu->stat.instruction_sckpf++;
1513 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1514 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1516 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
1517 return kvm_s390_inject_program_int(vcpu,
1520 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
1521 vcpu->arch.sie_block->todpr = value;
1526 static int handle_ptff(struct kvm_vcpu *vcpu)
1528 vcpu->stat.instruction_ptff++;
1530 /* we don't emulate any control instructions yet */
1531 kvm_s390_set_psw_cc(vcpu, 3);
1535 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
1537 switch (vcpu->arch.sie_block->ipa & 0x00ff) {
1539 return handle_ptff(vcpu);
1541 return handle_sckpf(vcpu);