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>
27 #include <asm/ptrace.h>
28 #include <asm/compat.h>
33 /* Handle SCK (SET CLOCK) interception */
34 static int handle_set_clock(struct kvm_vcpu *vcpu)
36 struct kvm_vcpu *cpup;
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);
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, &val, sizeof(val));
49 return kvm_s390_inject_prog_cond(vcpu, rc);
51 if (store_tod_clock(&hostclk)) {
52 kvm_s390_set_psw_cc(vcpu, 3);
55 val = (val - hostclk) & ~0x3fUL;
57 mutex_lock(&vcpu->kvm->lock);
58 kvm_for_each_vcpu(i, cpup, vcpu->kvm)
59 cpup->arch.sie_block->epoch = val;
60 mutex_unlock(&vcpu->kvm->lock);
62 kvm_s390_set_psw_cc(vcpu, 0);
66 static int handle_set_prefix(struct kvm_vcpu *vcpu)
72 vcpu->stat.instruction_spx++;
74 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
75 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
77 operand2 = kvm_s390_get_base_disp_s(vcpu);
79 /* must be word boundary */
81 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
84 rc = read_guest(vcpu, operand2, &address, sizeof(address));
86 return kvm_s390_inject_prog_cond(vcpu, rc);
88 address &= 0x7fffe000u;
91 * Make sure the new value is valid memory. We only need to check the
92 * first page, since address is 8k aligned and memory pieces are always
93 * at least 1MB aligned and have at least a size of 1MB.
95 if (kvm_is_error_gpa(vcpu->kvm, address))
96 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
98 kvm_s390_set_prefix(vcpu, address);
100 VCPU_EVENT(vcpu, 5, "setting prefix to %x", address);
101 trace_kvm_s390_handle_prefix(vcpu, 1, address);
105 static int handle_store_prefix(struct kvm_vcpu *vcpu)
111 vcpu->stat.instruction_stpx++;
113 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
114 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
116 operand2 = kvm_s390_get_base_disp_s(vcpu);
118 /* must be word boundary */
120 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
122 address = kvm_s390_get_prefix(vcpu);
125 rc = write_guest(vcpu, operand2, &address, sizeof(address));
127 return kvm_s390_inject_prog_cond(vcpu, rc);
129 VCPU_EVENT(vcpu, 5, "storing prefix to %x", address);
130 trace_kvm_s390_handle_prefix(vcpu, 0, address);
134 static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
136 u16 vcpu_id = vcpu->vcpu_id;
140 vcpu->stat.instruction_stap++;
142 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
143 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
145 ga = kvm_s390_get_base_disp_s(vcpu);
148 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
150 rc = write_guest(vcpu, ga, &vcpu_id, sizeof(vcpu_id));
152 return kvm_s390_inject_prog_cond(vcpu, rc);
154 VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", ga);
155 trace_kvm_s390_handle_stap(vcpu, ga);
159 static int __skey_check_enable(struct kvm_vcpu *vcpu)
162 if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)))
165 rc = s390_enable_skey();
166 trace_kvm_s390_skey_related_inst(vcpu);
167 vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
172 static int handle_skey(struct kvm_vcpu *vcpu)
174 int rc = __skey_check_enable(vcpu);
178 vcpu->stat.instruction_storage_key++;
180 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
181 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
183 kvm_s390_rewind_psw(vcpu, 4);
184 VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
188 static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
190 vcpu->stat.instruction_ipte_interlock++;
191 if (psw_bits(vcpu->arch.sie_block->gpsw).p)
192 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
193 wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
194 kvm_s390_rewind_psw(vcpu, 4);
195 VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
199 static int handle_test_block(struct kvm_vcpu *vcpu)
204 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
205 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
207 kvm_s390_get_regs_rre(vcpu, NULL, ®2);
208 addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
209 addr = kvm_s390_logical_to_effective(vcpu, addr);
210 if (kvm_s390_check_low_addr_protection(vcpu, addr))
211 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
212 addr = kvm_s390_real_to_abs(vcpu, addr);
214 if (kvm_is_error_gpa(vcpu->kvm, addr))
215 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
217 * We don't expect errors on modern systems, and do not care
218 * about storage keys (yet), so let's just clear the page.
220 if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
222 kvm_s390_set_psw_cc(vcpu, 0);
223 vcpu->run->s.regs.gprs[0] = 0;
227 static int handle_tpi(struct kvm_vcpu *vcpu)
229 struct kvm_s390_interrupt_info *inti;
236 addr = kvm_s390_get_base_disp_s(vcpu);
238 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
240 inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0);
244 tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
245 tpi_data[1] = inti->io.io_int_parm;
246 tpi_data[2] = inti->io.io_int_word;
249 * Store the two-word I/O interruption code into the
252 len = sizeof(tpi_data) - 4;
253 rc = write_guest(vcpu, addr, &tpi_data, len);
255 return kvm_s390_inject_prog_cond(vcpu, rc);
258 * Store the three-word I/O interruption code into
259 * the appropriate lowcore area.
261 len = sizeof(tpi_data);
262 if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len))
266 * If we encounter a problem storing the interruption code, the
267 * instruction is suppressed from the guest's view: reinject the
273 kvm_s390_reinject_io_int(vcpu->kvm, inti);
275 /* Set condition code and we're done. */
277 kvm_s390_set_psw_cc(vcpu, cc);
278 return rc ? -EFAULT : 0;
281 static int handle_tsch(struct kvm_vcpu *vcpu)
283 struct kvm_s390_interrupt_info *inti;
285 inti = kvm_s390_get_io_int(vcpu->kvm, 0,
286 vcpu->run->s.regs.gprs[1]);
289 * Prepare exit to userspace.
290 * We indicate whether we dequeued a pending I/O interrupt
291 * so that userspace can re-inject it if the instruction gets
292 * a program check. While this may re-order the pending I/O
293 * interrupts, this is no problem since the priority is kept
296 vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
297 vcpu->run->s390_tsch.dequeued = !!inti;
299 vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
300 vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
301 vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
302 vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
304 vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
309 static int handle_io_inst(struct kvm_vcpu *vcpu)
311 VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
313 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
314 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
316 if (vcpu->kvm->arch.css_support) {
318 * Most I/O instructions will be handled by userspace.
319 * Exceptions are tpi and the interrupt portion of tsch.
321 if (vcpu->arch.sie_block->ipa == 0xb236)
322 return handle_tpi(vcpu);
323 if (vcpu->arch.sie_block->ipa == 0xb235)
324 return handle_tsch(vcpu);
325 /* Handle in userspace. */
329 * Set condition code 3 to stop the guest from issuing channel
332 kvm_s390_set_psw_cc(vcpu, 3);
337 static int handle_stfl(struct kvm_vcpu *vcpu)
342 vcpu->stat.instruction_stfl++;
344 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
345 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
348 * We need to shift the lower 32 facility bits (bit 0-31) from a u64
349 * into a u32 memory representation. They will remain bits 0-31.
351 fac = *vcpu->kvm->arch.model.fac->list >> 32;
352 rc = write_guest_lc(vcpu, offsetof(struct _lowcore, stfl_fac_list),
356 VCPU_EVENT(vcpu, 5, "store facility list value %x", fac);
357 trace_kvm_s390_handle_stfl(vcpu, fac);
361 #define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
362 #define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
363 #define PSW_ADDR_24 0x0000000000ffffffUL
364 #define PSW_ADDR_31 0x000000007fffffffUL
366 int is_valid_psw(psw_t *psw)
368 if (psw->mask & PSW_MASK_UNASSIGNED)
370 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
371 if (psw->addr & ~PSW_ADDR_31)
374 if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
376 if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
383 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
385 psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
386 psw_compat_t new_psw;
390 if (gpsw->mask & PSW_MASK_PSTATE)
391 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
393 addr = kvm_s390_get_base_disp_s(vcpu);
395 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
397 rc = read_guest(vcpu, addr, &new_psw, sizeof(new_psw));
399 return kvm_s390_inject_prog_cond(vcpu, rc);
400 if (!(new_psw.mask & PSW32_MASK_BASE))
401 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
402 gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
403 gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
404 gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
405 if (!is_valid_psw(gpsw))
406 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
410 static int handle_lpswe(struct kvm_vcpu *vcpu)
416 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
417 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
419 addr = kvm_s390_get_base_disp_s(vcpu);
421 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
422 rc = read_guest(vcpu, addr, &new_psw, sizeof(new_psw));
424 return kvm_s390_inject_prog_cond(vcpu, rc);
425 vcpu->arch.sie_block->gpsw = new_psw;
426 if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
427 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
431 static int handle_stidp(struct kvm_vcpu *vcpu)
433 u64 stidp_data = vcpu->arch.stidp_data;
437 vcpu->stat.instruction_stidp++;
439 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
440 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
442 operand2 = kvm_s390_get_base_disp_s(vcpu);
445 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
447 rc = write_guest(vcpu, operand2, &stidp_data, sizeof(stidp_data));
449 return kvm_s390_inject_prog_cond(vcpu, rc);
451 VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
455 static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
460 cpus = atomic_read(&vcpu->kvm->online_vcpus);
462 /* deal with other level 3 hypervisors */
463 if (stsi(mem, 3, 2, 2))
467 for (n = mem->count - 1; n > 0 ; n--)
468 memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
470 memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
471 mem->vm[0].cpus_total = cpus;
472 mem->vm[0].cpus_configured = cpus;
473 mem->vm[0].cpus_standby = 0;
474 mem->vm[0].cpus_reserved = 0;
475 mem->vm[0].caf = 1000;
476 memcpy(mem->vm[0].name, "KVMguest", 8);
477 ASCEBC(mem->vm[0].name, 8);
478 memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
479 ASCEBC(mem->vm[0].cpi, 16);
482 static int handle_stsi(struct kvm_vcpu *vcpu)
484 int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
485 int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
486 int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
487 unsigned long mem = 0;
491 vcpu->stat.instruction_stsi++;
492 VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);
494 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
495 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
498 kvm_s390_set_psw_cc(vcpu, 3);
502 if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
503 || vcpu->run->s.regs.gprs[1] & 0xffff0000)
504 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
507 vcpu->run->s.regs.gprs[0] = 3 << 28;
508 kvm_s390_set_psw_cc(vcpu, 0);
512 operand2 = kvm_s390_get_base_disp_s(vcpu);
514 if (operand2 & 0xfff)
515 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
518 case 1: /* same handling for 1 and 2 */
520 mem = get_zeroed_page(GFP_KERNEL);
523 if (stsi((void *) mem, fc, sel1, sel2))
527 if (sel1 != 2 || sel2 != 2)
529 mem = get_zeroed_page(GFP_KERNEL);
532 handle_stsi_3_2_2(vcpu, (void *) mem);
536 rc = write_guest(vcpu, operand2, (void *)mem, PAGE_SIZE);
538 rc = kvm_s390_inject_prog_cond(vcpu, rc);
541 trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
543 kvm_s390_set_psw_cc(vcpu, 0);
544 vcpu->run->s.regs.gprs[0] = 0;
547 kvm_s390_set_psw_cc(vcpu, 3);
553 static const intercept_handler_t b2_handlers[256] = {
554 [0x02] = handle_stidp,
555 [0x04] = handle_set_clock,
556 [0x10] = handle_set_prefix,
557 [0x11] = handle_store_prefix,
558 [0x12] = handle_store_cpu_address,
559 [0x21] = handle_ipte_interlock,
560 [0x29] = handle_skey,
561 [0x2a] = handle_skey,
562 [0x2b] = handle_skey,
563 [0x2c] = handle_test_block,
564 [0x30] = handle_io_inst,
565 [0x31] = handle_io_inst,
566 [0x32] = handle_io_inst,
567 [0x33] = handle_io_inst,
568 [0x34] = handle_io_inst,
569 [0x35] = handle_io_inst,
570 [0x36] = handle_io_inst,
571 [0x37] = handle_io_inst,
572 [0x38] = handle_io_inst,
573 [0x39] = handle_io_inst,
574 [0x3a] = handle_io_inst,
575 [0x3b] = handle_io_inst,
576 [0x3c] = handle_io_inst,
577 [0x50] = handle_ipte_interlock,
578 [0x5f] = handle_io_inst,
579 [0x74] = handle_io_inst,
580 [0x76] = handle_io_inst,
581 [0x7d] = handle_stsi,
582 [0xb1] = handle_stfl,
583 [0xb2] = handle_lpswe,
586 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
588 intercept_handler_t handler;
591 * A lot of B2 instructions are priviledged. Here we check for
592 * the privileged ones, that we can handle in the kernel.
593 * Anything else goes to userspace.
595 handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
597 return handler(vcpu);
602 static int handle_epsw(struct kvm_vcpu *vcpu)
606 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
608 /* This basically extracts the mask half of the psw. */
609 vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
610 vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
612 vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
613 vcpu->run->s.regs.gprs[reg2] |=
614 vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
619 #define PFMF_RESERVED 0xfffc0101UL
620 #define PFMF_SK 0x00020000UL
621 #define PFMF_CF 0x00010000UL
622 #define PFMF_UI 0x00008000UL
623 #define PFMF_FSC 0x00007000UL
624 #define PFMF_NQ 0x00000800UL
625 #define PFMF_MR 0x00000400UL
626 #define PFMF_MC 0x00000200UL
627 #define PFMF_KEY 0x000000feUL
629 static int handle_pfmf(struct kvm_vcpu *vcpu)
632 unsigned long start, end;
634 vcpu->stat.instruction_pfmf++;
636 kvm_s390_get_regs_rre(vcpu, ®1, ®2);
638 if (!MACHINE_HAS_PFMF)
639 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
641 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
642 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
644 if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
645 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
647 /* Only provide non-quiescing support if the host supports it */
648 if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && !test_facility(14))
649 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
651 /* No support for conditional-SSKE */
652 if (vcpu->run->s.regs.gprs[reg1] & (PFMF_MR | PFMF_MC))
653 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
655 start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
656 start = kvm_s390_logical_to_effective(vcpu, start);
658 switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
660 end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
663 end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
665 /* We dont support EDAT2
667 end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
670 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
673 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
674 if (kvm_s390_check_low_addr_protection(vcpu, start))
675 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
678 while (start < end) {
679 unsigned long useraddr, abs_addr;
681 /* Translate guest address to host address */
682 if ((vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) == 0)
683 abs_addr = kvm_s390_real_to_abs(vcpu, start);
686 useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(abs_addr));
687 if (kvm_is_error_hva(useraddr))
688 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
690 if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
691 if (clear_user((void __user *)useraddr, PAGE_SIZE))
692 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
695 if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
696 int rc = __skey_check_enable(vcpu);
700 if (set_guest_storage_key(current->mm, useraddr,
701 vcpu->run->s.regs.gprs[reg1] & PFMF_KEY,
702 vcpu->run->s.regs.gprs[reg1] & PFMF_NQ))
703 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
708 if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC)
709 vcpu->run->s.regs.gprs[reg2] = end;
713 static int handle_essa(struct kvm_vcpu *vcpu)
715 /* entries expected to be 1FF */
716 int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
717 unsigned long *cbrlo, cbrle;
721 VCPU_EVENT(vcpu, 5, "cmma release %d pages", entries);
722 gmap = vcpu->arch.gmap;
723 vcpu->stat.instruction_essa++;
724 if (!kvm_s390_cmma_enabled(vcpu->kvm))
725 return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
727 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
728 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
730 if (((vcpu->arch.sie_block->ipb & 0xf0000000) >> 28) > 6)
731 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
733 /* Rewind PSW to repeat the ESSA instruction */
734 kvm_s390_rewind_psw(vcpu, 4);
735 vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
736 cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
737 down_read(&gmap->mm->mmap_sem);
738 for (i = 0; i < entries; ++i) {
740 if (unlikely(cbrle & ~PAGE_MASK || cbrle < 2 * PAGE_SIZE))
743 /* try to free backing */
744 __gmap_zap(gmap, cbrle);
746 up_read(&gmap->mm->mmap_sem);
748 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
752 static const intercept_handler_t b9_handlers[256] = {
753 [0x8a] = handle_ipte_interlock,
754 [0x8d] = handle_epsw,
755 [0x8e] = handle_ipte_interlock,
756 [0x8f] = handle_ipte_interlock,
757 [0xab] = handle_essa,
758 [0xaf] = handle_pfmf,
761 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
763 intercept_handler_t handler;
765 /* This is handled just as for the B2 instructions. */
766 handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
768 return handler(vcpu);
773 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
775 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
776 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
777 int reg, rc, nr_regs;
781 vcpu->stat.instruction_lctl++;
783 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
784 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
786 ga = kvm_s390_get_base_disp_rs(vcpu);
789 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
791 VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
792 trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
794 nr_regs = ((reg3 - reg1) & 0xf) + 1;
795 rc = read_guest(vcpu, ga, ctl_array, nr_regs * sizeof(u32));
797 return kvm_s390_inject_prog_cond(vcpu, rc);
801 vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
802 vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
805 reg = (reg + 1) % 16;
807 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
811 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
813 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
814 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
815 int reg, rc, nr_regs;
819 vcpu->stat.instruction_stctl++;
821 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
822 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
824 ga = kvm_s390_get_base_disp_rs(vcpu);
827 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
829 VCPU_EVENT(vcpu, 5, "stctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
830 trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
835 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
838 reg = (reg + 1) % 16;
840 rc = write_guest(vcpu, ga, ctl_array, nr_regs * sizeof(u32));
841 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
844 static int handle_lctlg(struct kvm_vcpu *vcpu)
846 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
847 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
848 int reg, rc, nr_regs;
852 vcpu->stat.instruction_lctlg++;
854 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
855 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
857 ga = kvm_s390_get_base_disp_rsy(vcpu);
860 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
862 VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
863 trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
865 nr_regs = ((reg3 - reg1) & 0xf) + 1;
866 rc = read_guest(vcpu, ga, ctl_array, nr_regs * sizeof(u64));
868 return kvm_s390_inject_prog_cond(vcpu, rc);
872 vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
875 reg = (reg + 1) % 16;
877 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
881 static int handle_stctg(struct kvm_vcpu *vcpu)
883 int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
884 int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
885 int reg, rc, nr_regs;
889 vcpu->stat.instruction_stctg++;
891 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
892 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
894 ga = kvm_s390_get_base_disp_rsy(vcpu);
897 return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
899 VCPU_EVENT(vcpu, 5, "stctg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
900 trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
905 ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
908 reg = (reg + 1) % 16;
910 rc = write_guest(vcpu, ga, ctl_array, nr_regs * sizeof(u64));
911 return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
914 static const intercept_handler_t eb_handlers[256] = {
915 [0x2f] = handle_lctlg,
916 [0x25] = handle_stctg,
919 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
921 intercept_handler_t handler;
923 handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
925 return handler(vcpu);
929 static int handle_tprot(struct kvm_vcpu *vcpu)
931 u64 address1, address2;
932 unsigned long hva, gpa;
936 vcpu->stat.instruction_tprot++;
938 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
939 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
941 kvm_s390_get_base_disp_sse(vcpu, &address1, &address2);
943 /* we only handle the Linux memory detection case:
945 * everything else goes to userspace. */
948 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
950 ret = guest_translate_address(vcpu, address1, &gpa, 1);
951 if (ret == PGM_PROTECTION) {
952 /* Write protected? Try again with read-only... */
954 ret = guest_translate_address(vcpu, address1, &gpa, 0);
957 if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
958 ret = kvm_s390_inject_program_int(vcpu, ret);
959 } else if (ret > 0) {
960 /* Translation not available */
961 kvm_s390_set_psw_cc(vcpu, 3);
967 hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
968 if (kvm_is_error_hva(hva)) {
969 ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
972 cc = 1; /* Write not permitted ==> read-only */
973 kvm_s390_set_psw_cc(vcpu, cc);
974 /* Note: CC2 only occurs for storage keys (not supported yet) */
977 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
982 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
984 /* For e5xx... instructions we only handle TPROT */
985 if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
986 return handle_tprot(vcpu);
990 static int handle_sckpf(struct kvm_vcpu *vcpu)
994 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
995 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
997 if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
998 return kvm_s390_inject_program_int(vcpu,
1001 value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
1002 vcpu->arch.sie_block->todpr = value;
1007 static const intercept_handler_t x01_handlers[256] = {
1008 [0x07] = handle_sckpf,
1011 int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
1013 intercept_handler_t handler;
1015 handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
1017 return handler(vcpu);