2 * handling privileged instructions
4 * Copyright IBM Corp. 2008, 2013
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
14 #include <linux/kvm.h>
15 #include <linux/gfp.h>
16 #include <linux/errno.h>
17 #include <linux/compat.h>
18 #include <asm/asm-offsets.h>
19 #include <asm/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/pgtable.h>
25 #include <asm/pgalloc.h>
28 #include <asm/ptrace.h>
29 #include <asm/compat.h>
34 /* Handle SCK (SET CLOCK) interception */
35 static int handle_set_clock(struct kvm_vcpu *vcpu)
41 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
42 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
44 op2 = kvm_s390_get_base_disp_s(vcpu, &ar);
45 if (op2 & 7) /* Operand must be on a doubleword boundary */
46 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
47 rc = read_guest(vcpu, op2, ar, &val, sizeof(val));
49 return kvm_s390_inject_prog_cond(vcpu, rc);
51 VCPU_EVENT(vcpu, 3, "SCK: setting guest TOD to 0x%llx", val);
52 kvm_s390_set_tod_clock(vcpu->kvm, val);
54 kvm_s390_set_psw_cc(vcpu, 0);
58 static int handle_set_prefix(struct kvm_vcpu *vcpu)
65 vcpu->stat.instruction_spx++;
67 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
68 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
70 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
72 /* must be word boundary */
74 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
77 rc = read_guest(vcpu, operand2, ar, &address, sizeof(address));
79 return kvm_s390_inject_prog_cond(vcpu, rc);
81 address &= 0x7fffe000u;
84 * Make sure the new value is valid memory. We only need to check the
85 * first page, since address is 8k aligned and memory pieces are always
86 * at least 1MB aligned and have at least a size of 1MB.
88 if (kvm_is_error_gpa(vcpu->kvm, address))
89 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
91 kvm_s390_set_prefix(vcpu, address);
92 trace_kvm_s390_handle_prefix(vcpu, 1, address);
96 static int handle_store_prefix(struct kvm_vcpu *vcpu)
103 vcpu->stat.instruction_stpx++;
105 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
106 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
108 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
110 /* must be word boundary */
112 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
114 address = kvm_s390_get_prefix(vcpu);
117 rc = write_guest(vcpu, operand2, ar, &address, sizeof(address));
119 return kvm_s390_inject_prog_cond(vcpu, rc);
121 VCPU_EVENT(vcpu, 3, "STPX: storing prefix 0x%x into 0x%llx", address, operand2);
122 trace_kvm_s390_handle_prefix(vcpu, 0, address);
126 static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
128 u16 vcpu_id = vcpu->vcpu_id;
133 vcpu->stat.instruction_stap++;
135 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
136 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
138 ga = kvm_s390_get_base_disp_s(vcpu, &ar);
141 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
143 rc = write_guest(vcpu, ga, ar, &vcpu_id, sizeof(vcpu_id));
145 return kvm_s390_inject_prog_cond(vcpu, rc);
147 VCPU_EVENT(vcpu, 3, "STAP: storing cpu address (%u) to 0x%llx", vcpu_id, ga);
148 trace_kvm_s390_handle_stap(vcpu, ga);
152 static int __skey_check_enable(struct kvm_vcpu *vcpu)
155 if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)))
158 rc = s390_enable_skey();
159 VCPU_EVENT(vcpu, 3, "%s", "enabling storage keys for guest");
160 trace_kvm_s390_skey_related_inst(vcpu);
161 vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
166 static int handle_skey(struct kvm_vcpu *vcpu)
168 int rc = __skey_check_enable(vcpu);
172 vcpu->stat.instruction_storage_key++;
174 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
175 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
177 kvm_s390_retry_instr(vcpu);
178 VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
182 static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
184 vcpu->stat.instruction_ipte_interlock++;
185 if (psw_bits(vcpu->arch.sie_block->gpsw).p)
186 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
187 wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
188 kvm_s390_retry_instr(vcpu);
189 VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
193 static int handle_test_block(struct kvm_vcpu *vcpu)
198 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
199 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
201 kvm_s390_get_regs_rre(vcpu, NULL, ®2);
202 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
203 addr = kvm_s390_logical_to_effective(vcpu, addr);
204 if (kvm_s390_check_low_addr_prot_real(vcpu, addr))
205 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
206 addr = kvm_s390_real_to_abs(vcpu, addr);
208 if (kvm_is_error_gpa(vcpu->kvm, addr))
209 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
211 * We don't expect errors on modern systems, and do not care
212 * about storage keys (yet), so let's just clear the page.
214 if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
216 kvm_s390_set_psw_cc(vcpu, 0);
217 vcpu->run->s.regs.gprs[0] = 0;
221 static int handle_tpi(struct kvm_vcpu *vcpu)
223 struct kvm_s390_interrupt_info *inti;
230 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
232 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
234 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0);
236 kvm_s390_set_psw_cc(vcpu, 0);
240 tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
241 tpi_data[1] = inti->io.io_int_parm;
242 tpi_data[2] = inti->io.io_int_word;
245 * Store the two-word I/O interruption code into the
248 len = sizeof(tpi_data) - 4;
249 rc = write_guest(vcpu, addr, ar, &tpi_data, len);
251 rc = kvm_s390_inject_prog_cond(vcpu, rc);
252 goto reinject_interrupt;
256 * Store the three-word I/O interruption code into
257 * the appropriate lowcore area.
259 len = sizeof(tpi_data);
260 if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len)) {
261 /* failed writes to the low core are not recoverable */
263 goto reinject_interrupt;
267 /* irq was successfully handed to the guest */
269 kvm_s390_set_psw_cc(vcpu, 1);
273 * If we encounter a problem storing the interruption code, the
274 * instruction is suppressed from the guest's view: reinject the
277 if (kvm_s390_reinject_io_int(vcpu->kvm, inti)) {
281 /* don't set the cc, a pgm irq was injected or we drop to user space */
282 return rc ? -EFAULT : 0;
285 static int handle_tsch(struct kvm_vcpu *vcpu)
287 struct kvm_s390_interrupt_info *inti = NULL;
288 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
290 /* a valid schid has at least one bit set */
291 if (vcpu->run->s.regs.gprs[1])
292 inti = kvm_s390_get_io_int(vcpu->kvm, isc_mask,
293 vcpu->run->s.regs.gprs[1]);
296 * Prepare exit to userspace.
297 * We indicate whether we dequeued a pending I/O interrupt
298 * so that userspace can re-inject it if the instruction gets
299 * a program check. While this may re-order the pending I/O
300 * interrupts, this is no problem since the priority is kept
303 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
304 vcpu->run->s390_tsch.dequeued = !!inti;
306 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
307 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
308 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
309 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
311 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
316 static int handle_io_inst(struct kvm_vcpu *vcpu)
318 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
320 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
321 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
323 if (vcpu->kvm->arch.css_support) {
325 * Most I/O instructions will be handled by userspace.
326 * Exceptions are tpi and the interrupt portion of tsch.
328 if (vcpu->arch.sie_block->ipa == 0xb236)
329 return handle_tpi(vcpu);
330 if (vcpu->arch.sie_block->ipa == 0xb235)
331 return handle_tsch(vcpu);
332 /* Handle in userspace. */
336 * Set condition code 3 to stop the guest from issuing channel
339 kvm_s390_set_psw_cc(vcpu, 3);
344 static int handle_stfl(struct kvm_vcpu *vcpu)
349 vcpu->stat.instruction_stfl++;
351 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
352 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
355 * We need to shift the lower 32 facility bits (bit 0-31) from a u64
356 * into a u32 memory representation. They will remain bits 0-31.
358 fac = *vcpu->kvm->arch.model.fac_list >> 32;
359 rc = write_guest_lc(vcpu, offsetof(struct lowcore, stfl_fac_list),
363 VCPU_EVENT(vcpu, 3, "STFL: store facility list 0x%x", fac);
364 trace_kvm_s390_handle_stfl(vcpu, fac);
368 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
369 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
370 #define PSW_ADDR_24 0x0000000000ffffffUL
371 #define PSW_ADDR_31 0x000000007fffffffUL
373 int is_valid_psw(psw_t *psw)
375 if (psw->mask & PSW_MASK_UNASSIGNED)
377 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
378 if (psw->addr & ~PSW_ADDR_31)
381 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
383 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
390 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
392 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
393 psw_compat_t new_psw;
398 if (gpsw->mask & PSW_MASK_PSTATE)
399 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
401 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
403 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
405 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
407 return kvm_s390_inject_prog_cond(vcpu, rc);
408 if (!(new_psw.mask & PSW32_MASK_BASE))
409 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
410 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
411 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
412 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
413 if (!is_valid_psw(gpsw))
414 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
418 static int handle_lpswe(struct kvm_vcpu *vcpu)
425 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
426 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
428 addr = kvm_s390_get_base_disp_s(vcpu, &ar);
430 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
431 rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
433 return kvm_s390_inject_prog_cond(vcpu, rc);
434 vcpu->arch.sie_block->gpsw = new_psw;
435 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
436 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
440 static int handle_stidp(struct kvm_vcpu *vcpu)
442 u64 stidp_data = vcpu->kvm->arch.model.cpuid;
447 vcpu->stat.instruction_stidp++;
449 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
450 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
452 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
455 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
457 rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data));
459 return kvm_s390_inject_prog_cond(vcpu, rc);
461 VCPU_EVENT(vcpu, 3, "STIDP: store cpu id 0x%llx", stidp_data);
465 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
470 cpus = atomic_read(&vcpu->kvm->online_vcpus);
472 /* deal with other level 3 hypervisors */
473 if (stsi(mem, 3, 2, 2))
477 for (n = mem->count - 1; n > 0 ; n--)
478 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
480 memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
481 mem->vm[0].cpus_total = cpus;
482 mem->vm[0].cpus_configured = cpus;
483 mem->vm[0].cpus_standby = 0;
484 mem->vm[0].cpus_reserved = 0;
485 mem->vm[0].caf = 1000;
486 memcpy(mem->vm[0].name, "KVMguest", 8);
487 ASCEBC(mem->vm[0].name, 8);
488 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
489 ASCEBC(mem->vm[0].cpi, 16);
492 static void insert_stsi_usr_data(struct kvm_vcpu *vcpu, u64 addr, ar_t ar,
493 u8 fc, u8 sel1, u16 sel2)
495 vcpu->run->exit_reason = KVM_EXIT_S390_STSI;
496 vcpu->run->s390_stsi.addr = addr;
497 vcpu->run->s390_stsi.ar = ar;
498 vcpu->run->s390_stsi.fc = fc;
499 vcpu->run->s390_stsi.sel1 = sel1;
500 vcpu->run->s390_stsi.sel2 = sel2;
503 static int handle_stsi(struct kvm_vcpu *vcpu)
505 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
506 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
507 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
508 unsigned long mem = 0;
513 vcpu->stat.instruction_stsi++;
514 VCPU_EVENT(vcpu, 3, "STSI: fc: %u sel1: %u sel2: %u", fc, sel1, sel2);
516 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
517 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
520 kvm_s390_set_psw_cc(vcpu, 3);
524 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
525 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
526 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
529 vcpu->run->s.regs.gprs[0] = 3 << 28;
530 kvm_s390_set_psw_cc(vcpu, 0);
534 operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
536 if (operand2 & 0xfff)
537 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
540 case 1: /* same handling for 1 and 2 */
542 mem = get_zeroed_page(GFP_KERNEL);
545 if (stsi((void *) mem, fc, sel1, sel2))
549 if (sel1 != 2 || sel2 != 2)
551 mem = get_zeroed_page(GFP_KERNEL);
554 handle_stsi_3_2_2(vcpu, (void *) mem);
558 rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE);
560 rc = kvm_s390_inject_prog_cond(vcpu, rc);
563 if (vcpu->kvm->arch.user_stsi) {
564 insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2);
567 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
569 kvm_s390_set_psw_cc(vcpu, 0);
570 vcpu->run->s.regs.gprs[0] = 0;
573 kvm_s390_set_psw_cc(vcpu, 3);
579 static const intercept_handler_t b2_handlers[256] = {
580 [0x02] = handle_stidp,
581 [0x04] = handle_set_clock,
582 [0x10] = handle_set_prefix,
583 [0x11] = handle_store_prefix,
584 [0x12] = handle_store_cpu_address,
585 [0x21] = handle_ipte_interlock,
586 [0x29] = handle_skey,
587 [0x2a] = handle_skey,
588 [0x2b] = handle_skey,
589 [0x2c] = handle_test_block,
590 [0x30] = handle_io_inst,
591 [0x31] = handle_io_inst,
592 [0x32] = handle_io_inst,
593 [0x33] = handle_io_inst,
594 [0x34] = handle_io_inst,
595 [0x35] = handle_io_inst,
596 [0x36] = handle_io_inst,
597 [0x37] = handle_io_inst,
598 [0x38] = handle_io_inst,
599 [0x39] = handle_io_inst,
600 [0x3a] = handle_io_inst,
601 [0x3b] = handle_io_inst,
602 [0x3c] = handle_io_inst,
603 [0x50] = handle_ipte_interlock,
604 [0x5f] = handle_io_inst,
605 [0x74] = handle_io_inst,
606 [0x76] = handle_io_inst,
607 [0x7d] = handle_stsi,
608 [0xb1] = handle_stfl,
609 [0xb2] = handle_lpswe,
612 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
614 intercept_handler_t handler;
617 * A lot of B2 instructions are priviledged. Here we check for
618 * the privileged ones, that we can handle in the kernel.
619 * Anything else goes to userspace.
621 handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
623 return handler(vcpu);
628 static int handle_epsw(struct kvm_vcpu *vcpu)
632 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
634 /* This basically extracts the mask half of the psw. */
635 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
636 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
638 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
639 vcpu->run->s.regs.gprs[reg2] |=
640 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
645 #define PFMF_RESERVED 0xfffc0101UL
646 #define PFMF_SK 0x00020000UL
647 #define PFMF_CF 0x00010000UL
648 #define PFMF_UI 0x00008000UL
649 #define PFMF_FSC 0x00007000UL
650 #define PFMF_NQ 0x00000800UL
651 #define PFMF_MR 0x00000400UL
652 #define PFMF_MC 0x00000200UL
653 #define PFMF_KEY 0x000000feUL
655 static int handle_pfmf(struct kvm_vcpu *vcpu)
658 unsigned long start, end;
660 vcpu->stat.instruction_pfmf++;
662 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
664 if (!test_kvm_facility(vcpu->kvm, 8))
665 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
667 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
668 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
670 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
671 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
673 /* Only provide non-quiescing support if enabled for the guest */
674 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
675 !test_kvm_facility(vcpu->kvm, 14))
676 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
678 /* No support for conditional-SSKE */
679 if (vcpu->run->s.regs.gprs[reg1] & (PFMF_MR | PFMF_MC))
680 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
682 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
683 start = kvm_s390_logical_to_effective(vcpu, start);
685 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
687 end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
690 end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
693 /* only support 2G frame size if EDAT2 is available and we are
694 not in 24-bit addressing mode */
695 if (!test_kvm_facility(vcpu->kvm, 78) ||
696 psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_24BIT)
697 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
698 end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
701 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
704 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
705 if (kvm_s390_check_low_addr_prot_real(vcpu, start))
706 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
709 while (start < end) {
710 unsigned long useraddr, abs_addr;
712 /* Translate guest address to host address */
713 if ((vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) == 0)
714 abs_addr = kvm_s390_real_to_abs(vcpu, start);
717 useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(abs_addr));
718 if (kvm_is_error_hva(useraddr))
719 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
721 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
722 if (clear_user((void __user *)useraddr, PAGE_SIZE))
723 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
726 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
727 int rc = __skey_check_enable(vcpu);
731 if (set_guest_storage_key(current->mm, useraddr,
732 vcpu->run->s.regs.gprs[reg1] & PFMF_KEY,
733 vcpu->run->s.regs.gprs[reg1] & PFMF_NQ))
734 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
739 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC)
740 vcpu->run->s.regs.gprs[reg2] = end;
744 static int handle_essa(struct kvm_vcpu *vcpu)
746 /* entries expected to be 1FF */
747 int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
748 unsigned long *cbrlo;
752 VCPU_EVENT(vcpu, 4, "ESSA: release %d pages", entries);
753 gmap = vcpu->arch.gmap;
754 vcpu->stat.instruction_essa++;
755 if (!vcpu->kvm->arch.use_cmma)
756 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
758 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
759 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
761 if (((vcpu->arch.sie_block->ipb & 0xf0000000) >> 28) > 6)
762 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
764 /* Retry the ESSA instruction */
765 kvm_s390_retry_instr(vcpu);
766 vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
767 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
768 down_read(&gmap->mm->mmap_sem);
769 for (i = 0; i < entries; ++i)
770 __gmap_zap(gmap, cbrlo[i]);
771 up_read(&gmap->mm->mmap_sem);
775 static const intercept_handler_t b9_handlers[256] = {
776 [0x8a] = handle_ipte_interlock,
777 [0x8d] = handle_epsw,
778 [0x8e] = handle_ipte_interlock,
779 [0x8f] = handle_ipte_interlock,
780 [0xab] = handle_essa,
781 [0xaf] = handle_pfmf,
784 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
786 intercept_handler_t handler;
788 /* This is handled just as for the B2 instructions. */
789 handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
791 return handler(vcpu);
796 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
798 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
799 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
800 int reg, rc, nr_regs;
805 vcpu->stat.instruction_lctl++;
807 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
808 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
810 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
813 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
815 VCPU_EVENT(vcpu, 4, "LCTL: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
816 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
818 nr_regs = ((reg3 - reg1) & 0xf) + 1;
819 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
821 return kvm_s390_inject_prog_cond(vcpu, rc);
825 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
826 vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
829 reg = (reg + 1) % 16;
831 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
835 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
837 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
838 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
839 int reg, rc, nr_regs;
844 vcpu->stat.instruction_stctl++;
846 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
847 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
849 ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
852 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
854 VCPU_EVENT(vcpu, 4, "STCTL r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
855 trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
860 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
863 reg = (reg + 1) % 16;
865 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
866 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
869 static int handle_lctlg(struct kvm_vcpu *vcpu)
871 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
872 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
873 int reg, rc, nr_regs;
878 vcpu->stat.instruction_lctlg++;
880 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
881 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
883 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
886 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
888 VCPU_EVENT(vcpu, 4, "LCTLG: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
889 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
891 nr_regs = ((reg3 - reg1) & 0xf) + 1;
892 rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
894 return kvm_s390_inject_prog_cond(vcpu, rc);
898 vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
901 reg = (reg + 1) % 16;
903 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
907 static int handle_stctg(struct kvm_vcpu *vcpu)
909 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
910 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
911 int reg, rc, nr_regs;
916 vcpu->stat.instruction_stctg++;
918 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
919 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
921 ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
924 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
926 VCPU_EVENT(vcpu, 4, "STCTG r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
927 trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
932 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
935 reg = (reg + 1) % 16;
937 rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
938 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
941 static const intercept_handler_t eb_handlers[256] = {
942 [0x2f] = handle_lctlg,
943 [0x25] = handle_stctg,
946 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
948 intercept_handler_t handler;
950 handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
952 return handler(vcpu);
956 static int handle_tprot(struct kvm_vcpu *vcpu)
958 u64 address1, address2;
959 unsigned long hva, gpa;
964 vcpu->stat.instruction_tprot++;
966 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
967 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
969 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL);
971 /* we only handle the Linux memory detection case:
973 * everything else goes to userspace. */
976 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
978 ret = guest_translate_address(vcpu, address1, ar, &gpa, GACC_STORE);
979 if (ret == PGM_PROTECTION) {
980 /* Write protected? Try again with read-only... */
982 ret = guest_translate_address(vcpu, address1, ar, &gpa,
986 if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
987 ret = kvm_s390_inject_program_int(vcpu, ret);
988 } else if (ret > 0) {
989 /* Translation not available */
990 kvm_s390_set_psw_cc(vcpu, 3);
996 hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
997 if (kvm_is_error_hva(hva)) {
998 ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
1001 cc = 1; /* Write not permitted ==> read-only */
1002 kvm_s390_set_psw_cc(vcpu, cc);
1003 /* Note: CC2 only occurs for storage keys (not supported yet) */
1006 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1011 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
1013 /* For e5xx... instructions we only handle TPROT */
1014 if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
1015 return handle_tprot(vcpu);
1019 static int handle_sckpf(struct kvm_vcpu *vcpu)
1023 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1024 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1026 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
1027 return kvm_s390_inject_program_int(vcpu,
1030 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
1031 vcpu->arch.sie_block->todpr = value;
1036 static const intercept_handler_t x01_handlers[256] = {
1037 [0x07] = handle_sckpf,
1040 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
1042 intercept_handler_t handler;
1044 handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
1046 return handler(vcpu);