2 * hosting zSeries kernel virtual machines
4 * Copyright IBM Corp. 2008, 2009
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>
12 * Heiko Carstens <heiko.carstens@de.ibm.com>
13 * Christian Ehrhardt <ehrhardt@de.ibm.com>
14 * Jason J. Herne <jjherne@us.ibm.com>
17 #include <linux/compiler.h>
18 #include <linux/err.h>
20 #include <linux/hrtimer.h>
21 #include <linux/init.h>
22 #include <linux/kvm.h>
23 #include <linux/kvm_host.h>
24 #include <linux/module.h>
25 #include <linux/random.h>
26 #include <linux/slab.h>
27 #include <linux/timer.h>
28 #include <linux/vmalloc.h>
29 #include <asm/asm-offsets.h>
30 #include <asm/lowcore.h>
32 #include <asm/pgtable.h>
34 #include <asm/switch_to.h>
40 #define KMSG_COMPONENT "kvm-s390"
42 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
44 #define CREATE_TRACE_POINTS
46 #include "trace-s390.h"
48 #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */
50 #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
51 (KVM_MAX_VCPUS + LOCAL_IRQS))
53 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
55 struct kvm_stats_debugfs_item debugfs_entries[] = {
56 { "userspace_handled", VCPU_STAT(exit_userspace) },
57 { "exit_null", VCPU_STAT(exit_null) },
58 { "exit_validity", VCPU_STAT(exit_validity) },
59 { "exit_stop_request", VCPU_STAT(exit_stop_request) },
60 { "exit_external_request", VCPU_STAT(exit_external_request) },
61 { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
62 { "exit_instruction", VCPU_STAT(exit_instruction) },
63 { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
64 { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
65 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
66 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
67 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
68 { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
69 { "instruction_lctl", VCPU_STAT(instruction_lctl) },
70 { "instruction_stctl", VCPU_STAT(instruction_stctl) },
71 { "instruction_stctg", VCPU_STAT(instruction_stctg) },
72 { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
73 { "deliver_external_call", VCPU_STAT(deliver_external_call) },
74 { "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
75 { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) },
76 { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
77 { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
78 { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
79 { "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
80 { "exit_wait_state", VCPU_STAT(exit_wait_state) },
81 { "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
82 { "instruction_stidp", VCPU_STAT(instruction_stidp) },
83 { "instruction_spx", VCPU_STAT(instruction_spx) },
84 { "instruction_stpx", VCPU_STAT(instruction_stpx) },
85 { "instruction_stap", VCPU_STAT(instruction_stap) },
86 { "instruction_storage_key", VCPU_STAT(instruction_storage_key) },
87 { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
88 { "instruction_stsch", VCPU_STAT(instruction_stsch) },
89 { "instruction_chsc", VCPU_STAT(instruction_chsc) },
90 { "instruction_essa", VCPU_STAT(instruction_essa) },
91 { "instruction_stsi", VCPU_STAT(instruction_stsi) },
92 { "instruction_stfl", VCPU_STAT(instruction_stfl) },
93 { "instruction_tprot", VCPU_STAT(instruction_tprot) },
94 { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
95 { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
96 { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
97 { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
98 { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
99 { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
100 { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
101 { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
102 { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
103 { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
104 { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
105 { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
106 { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
107 { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) },
108 { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) },
109 { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) },
110 { "diagnose_10", VCPU_STAT(diagnose_10) },
111 { "diagnose_44", VCPU_STAT(diagnose_44) },
112 { "diagnose_9c", VCPU_STAT(diagnose_9c) },
113 { "diagnose_258", VCPU_STAT(diagnose_258) },
114 { "diagnose_308", VCPU_STAT(diagnose_308) },
115 { "diagnose_500", VCPU_STAT(diagnose_500) },
119 /* upper facilities limit for kvm */
120 unsigned long kvm_s390_fac_list_mask[] = {
121 0xffe6fffbfcfdfc40UL,
122 0x005e800000000000UL,
125 unsigned long kvm_s390_fac_list_mask_size(void)
127 BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64);
128 return ARRAY_SIZE(kvm_s390_fac_list_mask);
131 static struct gmap_notifier gmap_notifier;
132 debug_info_t *kvm_s390_dbf;
134 /* Section: not file related */
135 int kvm_arch_hardware_enable(void)
137 /* every s390 is virtualization enabled ;-) */
141 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address);
144 * This callback is executed during stop_machine(). All CPUs are therefore
145 * temporarily stopped. In order not to change guest behavior, we have to
146 * disable preemption whenever we touch the epoch of kvm and the VCPUs,
147 * so a CPU won't be stopped while calculating with the epoch.
149 static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
153 struct kvm_vcpu *vcpu;
155 unsigned long long *delta = v;
157 list_for_each_entry(kvm, &vm_list, vm_list) {
158 kvm->arch.epoch -= *delta;
159 kvm_for_each_vcpu(i, vcpu, kvm) {
160 vcpu->arch.sie_block->epoch -= *delta;
166 static struct notifier_block kvm_clock_notifier = {
167 .notifier_call = kvm_clock_sync,
170 int kvm_arch_hardware_setup(void)
172 gmap_notifier.notifier_call = kvm_gmap_notifier;
173 gmap_register_ipte_notifier(&gmap_notifier);
174 atomic_notifier_chain_register(&s390_epoch_delta_notifier,
175 &kvm_clock_notifier);
179 void kvm_arch_hardware_unsetup(void)
181 gmap_unregister_ipte_notifier(&gmap_notifier);
182 atomic_notifier_chain_unregister(&s390_epoch_delta_notifier,
183 &kvm_clock_notifier);
186 int kvm_arch_init(void *opaque)
188 kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
192 if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
193 debug_unregister(kvm_s390_dbf);
197 /* Register floating interrupt controller interface. */
198 return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
201 void kvm_arch_exit(void)
203 debug_unregister(kvm_s390_dbf);
206 /* Section: device related */
207 long kvm_arch_dev_ioctl(struct file *filp,
208 unsigned int ioctl, unsigned long arg)
210 if (ioctl == KVM_S390_ENABLE_SIE)
211 return s390_enable_sie();
215 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
220 case KVM_CAP_S390_PSW:
221 case KVM_CAP_S390_GMAP:
222 case KVM_CAP_SYNC_MMU:
223 #ifdef CONFIG_KVM_S390_UCONTROL
224 case KVM_CAP_S390_UCONTROL:
226 case KVM_CAP_ASYNC_PF:
227 case KVM_CAP_SYNC_REGS:
228 case KVM_CAP_ONE_REG:
229 case KVM_CAP_ENABLE_CAP:
230 case KVM_CAP_S390_CSS_SUPPORT:
231 case KVM_CAP_IOEVENTFD:
232 case KVM_CAP_DEVICE_CTRL:
233 case KVM_CAP_ENABLE_CAP_VM:
234 case KVM_CAP_S390_IRQCHIP:
235 case KVM_CAP_VM_ATTRIBUTES:
236 case KVM_CAP_MP_STATE:
237 case KVM_CAP_S390_INJECT_IRQ:
238 case KVM_CAP_S390_USER_SIGP:
239 case KVM_CAP_S390_USER_STSI:
240 case KVM_CAP_S390_SKEYS:
241 case KVM_CAP_S390_IRQ_STATE:
244 case KVM_CAP_S390_MEM_OP:
247 case KVM_CAP_NR_VCPUS:
248 case KVM_CAP_MAX_VCPUS:
249 r = sclp.has_esca ? KVM_S390_ESCA_CPU_SLOTS
250 : KVM_S390_BSCA_CPU_SLOTS;
252 case KVM_CAP_NR_MEMSLOTS:
253 r = KVM_USER_MEM_SLOTS;
255 case KVM_CAP_S390_COW:
256 r = MACHINE_HAS_ESOP;
258 case KVM_CAP_S390_VECTOR_REGISTERS:
261 case KVM_CAP_S390_RI:
262 r = test_facility(64);
270 static void kvm_s390_sync_dirty_log(struct kvm *kvm,
271 struct kvm_memory_slot *memslot)
273 gfn_t cur_gfn, last_gfn;
274 unsigned long address;
275 struct gmap *gmap = kvm->arch.gmap;
277 down_read(&gmap->mm->mmap_sem);
278 /* Loop over all guest pages */
279 last_gfn = memslot->base_gfn + memslot->npages;
280 for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) {
281 address = gfn_to_hva_memslot(memslot, cur_gfn);
283 if (gmap_test_and_clear_dirty(address, gmap))
284 mark_page_dirty(kvm, cur_gfn);
286 up_read(&gmap->mm->mmap_sem);
289 /* Section: vm related */
290 static void sca_del_vcpu(struct kvm_vcpu *vcpu);
293 * Get (and clear) the dirty memory log for a memory slot.
295 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
296 struct kvm_dirty_log *log)
300 struct kvm_memslots *slots;
301 struct kvm_memory_slot *memslot;
304 mutex_lock(&kvm->slots_lock);
307 if (log->slot >= KVM_USER_MEM_SLOTS)
310 slots = kvm_memslots(kvm);
311 memslot = id_to_memslot(slots, log->slot);
313 if (!memslot->dirty_bitmap)
316 kvm_s390_sync_dirty_log(kvm, memslot);
317 r = kvm_get_dirty_log(kvm, log, &is_dirty);
321 /* Clear the dirty log */
323 n = kvm_dirty_bitmap_bytes(memslot);
324 memset(memslot->dirty_bitmap, 0, n);
328 mutex_unlock(&kvm->slots_lock);
332 static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
340 case KVM_CAP_S390_IRQCHIP:
341 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
342 kvm->arch.use_irqchip = 1;
345 case KVM_CAP_S390_USER_SIGP:
346 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
347 kvm->arch.user_sigp = 1;
350 case KVM_CAP_S390_VECTOR_REGISTERS:
351 mutex_lock(&kvm->lock);
352 if (atomic_read(&kvm->online_vcpus)) {
354 } else if (MACHINE_HAS_VX) {
355 set_kvm_facility(kvm->arch.model.fac->mask, 129);
356 set_kvm_facility(kvm->arch.model.fac->list, 129);
360 mutex_unlock(&kvm->lock);
361 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
362 r ? "(not available)" : "(success)");
364 case KVM_CAP_S390_RI:
366 mutex_lock(&kvm->lock);
367 if (atomic_read(&kvm->online_vcpus)) {
369 } else if (test_facility(64)) {
370 set_kvm_facility(kvm->arch.model.fac->mask, 64);
371 set_kvm_facility(kvm->arch.model.fac->list, 64);
374 mutex_unlock(&kvm->lock);
375 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
376 r ? "(not available)" : "(success)");
378 case KVM_CAP_S390_USER_STSI:
379 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
380 kvm->arch.user_stsi = 1;
390 static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
394 switch (attr->attr) {
395 case KVM_S390_VM_MEM_LIMIT_SIZE:
397 VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
398 kvm->arch.mem_limit);
399 if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
409 static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
413 switch (attr->attr) {
414 case KVM_S390_VM_MEM_ENABLE_CMMA:
415 /* enable CMMA only for z10 and later (EDAT_1) */
417 if (!MACHINE_IS_LPAR || !MACHINE_HAS_EDAT1)
421 VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
422 mutex_lock(&kvm->lock);
423 if (atomic_read(&kvm->online_vcpus) == 0) {
424 kvm->arch.use_cmma = 1;
427 mutex_unlock(&kvm->lock);
429 case KVM_S390_VM_MEM_CLR_CMMA:
431 if (!kvm->arch.use_cmma)
434 VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
435 mutex_lock(&kvm->lock);
436 idx = srcu_read_lock(&kvm->srcu);
437 s390_reset_cmma(kvm->arch.gmap->mm);
438 srcu_read_unlock(&kvm->srcu, idx);
439 mutex_unlock(&kvm->lock);
442 case KVM_S390_VM_MEM_LIMIT_SIZE: {
443 unsigned long new_limit;
445 if (kvm_is_ucontrol(kvm))
448 if (get_user(new_limit, (u64 __user *)attr->addr))
451 if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
452 new_limit > kvm->arch.mem_limit)
458 /* gmap_alloc takes last usable address */
459 if (new_limit != KVM_S390_NO_MEM_LIMIT)
463 mutex_lock(&kvm->lock);
464 if (atomic_read(&kvm->online_vcpus) == 0) {
465 /* gmap_alloc will round the limit up */
466 struct gmap *new = gmap_alloc(current->mm, new_limit);
471 gmap_free(kvm->arch.gmap);
473 kvm->arch.gmap = new;
477 mutex_unlock(&kvm->lock);
478 VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit);
479 VM_EVENT(kvm, 3, "New guest asce: 0x%pK",
480 (void *) kvm->arch.gmap->asce);
490 static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);
492 static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
494 struct kvm_vcpu *vcpu;
497 if (!test_kvm_facility(kvm, 76))
500 mutex_lock(&kvm->lock);
501 switch (attr->attr) {
502 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
504 kvm->arch.crypto.crycb->aes_wrapping_key_mask,
505 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
506 kvm->arch.crypto.aes_kw = 1;
507 VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
509 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
511 kvm->arch.crypto.crycb->dea_wrapping_key_mask,
512 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
513 kvm->arch.crypto.dea_kw = 1;
514 VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
516 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
517 kvm->arch.crypto.aes_kw = 0;
518 memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0,
519 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
520 VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
522 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
523 kvm->arch.crypto.dea_kw = 0;
524 memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0,
525 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
526 VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
529 mutex_unlock(&kvm->lock);
533 kvm_for_each_vcpu(i, vcpu, kvm) {
534 kvm_s390_vcpu_crypto_setup(vcpu);
537 mutex_unlock(&kvm->lock);
541 static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
545 if (copy_from_user(>od_high, (void __user *)attr->addr,
551 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
556 static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
560 if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod)))
563 kvm_s390_set_tod_clock(kvm, gtod);
564 VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod);
568 static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
575 switch (attr->attr) {
576 case KVM_S390_VM_TOD_HIGH:
577 ret = kvm_s390_set_tod_high(kvm, attr);
579 case KVM_S390_VM_TOD_LOW:
580 ret = kvm_s390_set_tod_low(kvm, attr);
589 static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
593 if (copy_to_user((void __user *)attr->addr, >od_high,
596 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
601 static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
605 gtod = kvm_s390_get_tod_clock_fast(kvm);
606 if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
608 VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
613 static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
620 switch (attr->attr) {
621 case KVM_S390_VM_TOD_HIGH:
622 ret = kvm_s390_get_tod_high(kvm, attr);
624 case KVM_S390_VM_TOD_LOW:
625 ret = kvm_s390_get_tod_low(kvm, attr);
634 static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
636 struct kvm_s390_vm_cpu_processor *proc;
639 mutex_lock(&kvm->lock);
640 if (atomic_read(&kvm->online_vcpus)) {
644 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
649 if (!copy_from_user(proc, (void __user *)attr->addr,
651 memcpy(&kvm->arch.model.cpu_id, &proc->cpuid,
652 sizeof(struct cpuid));
653 kvm->arch.model.ibc = proc->ibc;
654 memcpy(kvm->arch.model.fac->list, proc->fac_list,
655 S390_ARCH_FAC_LIST_SIZE_BYTE);
660 mutex_unlock(&kvm->lock);
664 static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
668 switch (attr->attr) {
669 case KVM_S390_VM_CPU_PROCESSOR:
670 ret = kvm_s390_set_processor(kvm, attr);
676 static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
678 struct kvm_s390_vm_cpu_processor *proc;
681 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
686 memcpy(&proc->cpuid, &kvm->arch.model.cpu_id, sizeof(struct cpuid));
687 proc->ibc = kvm->arch.model.ibc;
688 memcpy(&proc->fac_list, kvm->arch.model.fac->list, S390_ARCH_FAC_LIST_SIZE_BYTE);
689 if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
696 static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
698 struct kvm_s390_vm_cpu_machine *mach;
701 mach = kzalloc(sizeof(*mach), GFP_KERNEL);
706 get_cpu_id((struct cpuid *) &mach->cpuid);
707 mach->ibc = sclp.ibc;
708 memcpy(&mach->fac_mask, kvm->arch.model.fac->mask,
709 S390_ARCH_FAC_LIST_SIZE_BYTE);
710 memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
711 S390_ARCH_FAC_LIST_SIZE_BYTE);
712 if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
719 static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
723 switch (attr->attr) {
724 case KVM_S390_VM_CPU_PROCESSOR:
725 ret = kvm_s390_get_processor(kvm, attr);
727 case KVM_S390_VM_CPU_MACHINE:
728 ret = kvm_s390_get_machine(kvm, attr);
734 static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
738 switch (attr->group) {
739 case KVM_S390_VM_MEM_CTRL:
740 ret = kvm_s390_set_mem_control(kvm, attr);
742 case KVM_S390_VM_TOD:
743 ret = kvm_s390_set_tod(kvm, attr);
745 case KVM_S390_VM_CPU_MODEL:
746 ret = kvm_s390_set_cpu_model(kvm, attr);
748 case KVM_S390_VM_CRYPTO:
749 ret = kvm_s390_vm_set_crypto(kvm, attr);
759 static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
763 switch (attr->group) {
764 case KVM_S390_VM_MEM_CTRL:
765 ret = kvm_s390_get_mem_control(kvm, attr);
767 case KVM_S390_VM_TOD:
768 ret = kvm_s390_get_tod(kvm, attr);
770 case KVM_S390_VM_CPU_MODEL:
771 ret = kvm_s390_get_cpu_model(kvm, attr);
781 static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
785 switch (attr->group) {
786 case KVM_S390_VM_MEM_CTRL:
787 switch (attr->attr) {
788 case KVM_S390_VM_MEM_ENABLE_CMMA:
789 case KVM_S390_VM_MEM_CLR_CMMA:
790 case KVM_S390_VM_MEM_LIMIT_SIZE:
798 case KVM_S390_VM_TOD:
799 switch (attr->attr) {
800 case KVM_S390_VM_TOD_LOW:
801 case KVM_S390_VM_TOD_HIGH:
809 case KVM_S390_VM_CPU_MODEL:
810 switch (attr->attr) {
811 case KVM_S390_VM_CPU_PROCESSOR:
812 case KVM_S390_VM_CPU_MACHINE:
820 case KVM_S390_VM_CRYPTO:
821 switch (attr->attr) {
822 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
823 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
824 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
825 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
841 static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
845 unsigned long curkey;
848 if (args->flags != 0)
851 /* Is this guest using storage keys? */
852 if (!mm_use_skey(current->mm))
853 return KVM_S390_GET_SKEYS_NONE;
855 /* Enforce sane limit on memory allocation */
856 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
859 keys = kmalloc_array(args->count, sizeof(uint8_t),
860 GFP_KERNEL | __GFP_NOWARN);
862 keys = vmalloc(sizeof(uint8_t) * args->count);
866 for (i = 0; i < args->count; i++) {
867 hva = gfn_to_hva(kvm, args->start_gfn + i);
868 if (kvm_is_error_hva(hva)) {
873 curkey = get_guest_storage_key(current->mm, hva);
874 if (IS_ERR_VALUE(curkey)) {
881 r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
882 sizeof(uint8_t) * args->count);
890 static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
896 if (args->flags != 0)
899 /* Enforce sane limit on memory allocation */
900 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
903 keys = kmalloc_array(args->count, sizeof(uint8_t),
904 GFP_KERNEL | __GFP_NOWARN);
906 keys = vmalloc(sizeof(uint8_t) * args->count);
910 r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
911 sizeof(uint8_t) * args->count);
917 /* Enable storage key handling for the guest */
918 r = s390_enable_skey();
922 for (i = 0; i < args->count; i++) {
923 hva = gfn_to_hva(kvm, args->start_gfn + i);
924 if (kvm_is_error_hva(hva)) {
929 /* Lowest order bit is reserved */
930 if (keys[i] & 0x01) {
935 r = set_guest_storage_key(current->mm, hva,
936 (unsigned long)keys[i], 0);
945 long kvm_arch_vm_ioctl(struct file *filp,
946 unsigned int ioctl, unsigned long arg)
948 struct kvm *kvm = filp->private_data;
949 void __user *argp = (void __user *)arg;
950 struct kvm_device_attr attr;
954 case KVM_S390_INTERRUPT: {
955 struct kvm_s390_interrupt s390int;
958 if (copy_from_user(&s390int, argp, sizeof(s390int)))
960 r = kvm_s390_inject_vm(kvm, &s390int);
963 case KVM_ENABLE_CAP: {
964 struct kvm_enable_cap cap;
966 if (copy_from_user(&cap, argp, sizeof(cap)))
968 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
971 case KVM_CREATE_IRQCHIP: {
972 struct kvm_irq_routing_entry routing;
975 if (kvm->arch.use_irqchip) {
976 /* Set up dummy routing. */
977 memset(&routing, 0, sizeof(routing));
978 r = kvm_set_irq_routing(kvm, &routing, 0, 0);
982 case KVM_SET_DEVICE_ATTR: {
984 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
986 r = kvm_s390_vm_set_attr(kvm, &attr);
989 case KVM_GET_DEVICE_ATTR: {
991 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
993 r = kvm_s390_vm_get_attr(kvm, &attr);
996 case KVM_HAS_DEVICE_ATTR: {
998 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
1000 r = kvm_s390_vm_has_attr(kvm, &attr);
1003 case KVM_S390_GET_SKEYS: {
1004 struct kvm_s390_skeys args;
1007 if (copy_from_user(&args, argp,
1008 sizeof(struct kvm_s390_skeys)))
1010 r = kvm_s390_get_skeys(kvm, &args);
1013 case KVM_S390_SET_SKEYS: {
1014 struct kvm_s390_skeys args;
1017 if (copy_from_user(&args, argp,
1018 sizeof(struct kvm_s390_skeys)))
1020 r = kvm_s390_set_skeys(kvm, &args);
1030 static int kvm_s390_query_ap_config(u8 *config)
1032 u32 fcn_code = 0x04000000UL;
1035 memset(config, 0, 128);
1039 ".long 0xb2af0000\n" /* PQAP(QCI) */
1045 : "r" (fcn_code), "r" (config)
1046 : "cc", "0", "2", "memory"
1052 static int kvm_s390_apxa_installed(void)
1057 if (test_facility(12)) {
1058 cc = kvm_s390_query_ap_config(config);
1061 pr_err("PQAP(QCI) failed with cc=%d", cc);
1063 return config[0] & 0x40;
1069 static void kvm_s390_set_crycb_format(struct kvm *kvm)
1071 kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
1073 if (kvm_s390_apxa_installed())
1074 kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
1076 kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
1079 static void kvm_s390_get_cpu_id(struct cpuid *cpu_id)
1082 cpu_id->version = 0xff;
1085 static int kvm_s390_crypto_init(struct kvm *kvm)
1087 if (!test_kvm_facility(kvm, 76))
1090 kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb),
1091 GFP_KERNEL | GFP_DMA);
1092 if (!kvm->arch.crypto.crycb)
1095 kvm_s390_set_crycb_format(kvm);
1097 /* Enable AES/DEA protected key functions by default */
1098 kvm->arch.crypto.aes_kw = 1;
1099 kvm->arch.crypto.dea_kw = 1;
1100 get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
1101 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
1102 get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
1103 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
1108 static void sca_dispose(struct kvm *kvm)
1110 if (kvm->arch.use_esca)
1111 free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
1113 free_page((unsigned long)(kvm->arch.sca));
1114 kvm->arch.sca = NULL;
1117 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
1120 char debug_name[16];
1121 static unsigned long sca_offset;
1124 #ifdef CONFIG_KVM_S390_UCONTROL
1125 if (type & ~KVM_VM_S390_UCONTROL)
1127 if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
1134 rc = s390_enable_sie();
1140 kvm->arch.use_esca = 0; /* start with basic SCA */
1141 rwlock_init(&kvm->arch.sca_lock);
1142 kvm->arch.sca = (struct bsca_block *) get_zeroed_page(GFP_KERNEL);
1145 spin_lock(&kvm_lock);
1147 if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
1149 kvm->arch.sca = (struct bsca_block *)
1150 ((char *) kvm->arch.sca + sca_offset);
1151 spin_unlock(&kvm_lock);
1153 sprintf(debug_name, "kvm-%u", current->pid);
1155 kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
1160 * The architectural maximum amount of facilities is 16 kbit. To store
1161 * this amount, 2 kbyte of memory is required. Thus we need a full
1162 * page to hold the guest facility list (arch.model.fac->list) and the
1163 * facility mask (arch.model.fac->mask). Its address size has to be
1164 * 31 bits and word aligned.
1166 kvm->arch.model.fac =
1167 (struct kvm_s390_fac *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
1168 if (!kvm->arch.model.fac)
1171 /* Populate the facility mask initially. */
1172 memcpy(kvm->arch.model.fac->mask, S390_lowcore.stfle_fac_list,
1173 S390_ARCH_FAC_LIST_SIZE_BYTE);
1174 for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) {
1175 if (i < kvm_s390_fac_list_mask_size())
1176 kvm->arch.model.fac->mask[i] &= kvm_s390_fac_list_mask[i];
1178 kvm->arch.model.fac->mask[i] = 0UL;
1181 /* Populate the facility list initially. */
1182 memcpy(kvm->arch.model.fac->list, kvm->arch.model.fac->mask,
1183 S390_ARCH_FAC_LIST_SIZE_BYTE);
1185 kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id);
1186 kvm->arch.model.ibc = sclp.ibc & 0x0fff;
1188 if (kvm_s390_crypto_init(kvm) < 0)
1191 spin_lock_init(&kvm->arch.float_int.lock);
1192 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1193 INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
1194 init_waitqueue_head(&kvm->arch.ipte_wq);
1195 mutex_init(&kvm->arch.ipte_mutex);
1197 debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
1198 VM_EVENT(kvm, 3, "vm created with type %lu", type);
1200 if (type & KVM_VM_S390_UCONTROL) {
1201 kvm->arch.gmap = NULL;
1202 kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
1204 if (sclp.hamax == U64_MAX)
1205 kvm->arch.mem_limit = TASK_MAX_SIZE;
1207 kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE,
1209 kvm->arch.gmap = gmap_alloc(current->mm, kvm->arch.mem_limit - 1);
1210 if (!kvm->arch.gmap)
1212 kvm->arch.gmap->private = kvm;
1213 kvm->arch.gmap->pfault_enabled = 0;
1216 kvm->arch.css_support = 0;
1217 kvm->arch.use_irqchip = 0;
1218 kvm->arch.epoch = 0;
1220 spin_lock_init(&kvm->arch.start_stop_lock);
1221 KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
1225 kfree(kvm->arch.crypto.crycb);
1226 free_page((unsigned long)kvm->arch.model.fac);
1227 debug_unregister(kvm->arch.dbf);
1229 KVM_EVENT(3, "creation of vm failed: %d", rc);
1233 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1235 VCPU_EVENT(vcpu, 3, "%s", "free cpu");
1236 trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
1237 kvm_s390_clear_local_irqs(vcpu);
1238 kvm_clear_async_pf_completion_queue(vcpu);
1239 if (!kvm_is_ucontrol(vcpu->kvm))
1242 if (kvm_is_ucontrol(vcpu->kvm))
1243 gmap_free(vcpu->arch.gmap);
1245 if (vcpu->kvm->arch.use_cmma)
1246 kvm_s390_vcpu_unsetup_cmma(vcpu);
1247 free_page((unsigned long)(vcpu->arch.sie_block));
1249 kvm_vcpu_uninit(vcpu);
1250 kmem_cache_free(kvm_vcpu_cache, vcpu);
1253 static void kvm_free_vcpus(struct kvm *kvm)
1256 struct kvm_vcpu *vcpu;
1258 kvm_for_each_vcpu(i, vcpu, kvm)
1259 kvm_arch_vcpu_destroy(vcpu);
1261 mutex_lock(&kvm->lock);
1262 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
1263 kvm->vcpus[i] = NULL;
1265 atomic_set(&kvm->online_vcpus, 0);
1266 mutex_unlock(&kvm->lock);
1269 void kvm_arch_destroy_vm(struct kvm *kvm)
1271 kvm_free_vcpus(kvm);
1272 free_page((unsigned long)kvm->arch.model.fac);
1274 debug_unregister(kvm->arch.dbf);
1275 kfree(kvm->arch.crypto.crycb);
1276 if (!kvm_is_ucontrol(kvm))
1277 gmap_free(kvm->arch.gmap);
1278 kvm_s390_destroy_adapters(kvm);
1279 kvm_s390_clear_float_irqs(kvm);
1280 KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
1283 /* Section: vcpu related */
1284 static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
1286 vcpu->arch.gmap = gmap_alloc(current->mm, -1UL);
1287 if (!vcpu->arch.gmap)
1289 vcpu->arch.gmap->private = vcpu->kvm;
1294 static void sca_del_vcpu(struct kvm_vcpu *vcpu)
1296 read_lock(&vcpu->kvm->arch.sca_lock);
1297 if (vcpu->kvm->arch.use_esca) {
1298 struct esca_block *sca = vcpu->kvm->arch.sca;
1300 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
1301 sca->cpu[vcpu->vcpu_id].sda = 0;
1303 struct bsca_block *sca = vcpu->kvm->arch.sca;
1305 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
1306 sca->cpu[vcpu->vcpu_id].sda = 0;
1308 read_unlock(&vcpu->kvm->arch.sca_lock);
1311 static void sca_add_vcpu(struct kvm_vcpu *vcpu)
1313 read_lock(&vcpu->kvm->arch.sca_lock);
1314 if (vcpu->kvm->arch.use_esca) {
1315 struct esca_block *sca = vcpu->kvm->arch.sca;
1317 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
1318 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
1319 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
1320 vcpu->arch.sie_block->ecb2 |= 0x04U;
1321 set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
1323 struct bsca_block *sca = vcpu->kvm->arch.sca;
1325 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
1326 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
1327 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
1328 set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
1330 read_unlock(&vcpu->kvm->arch.sca_lock);
1333 /* Basic SCA to Extended SCA data copy routines */
1334 static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
1337 d->sigp_ctrl.c = s->sigp_ctrl.c;
1338 d->sigp_ctrl.scn = s->sigp_ctrl.scn;
1341 static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
1345 d->ipte_control = s->ipte_control;
1347 for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
1348 sca_copy_entry(&d->cpu[i], &s->cpu[i]);
1351 static int sca_switch_to_extended(struct kvm *kvm)
1353 struct bsca_block *old_sca = kvm->arch.sca;
1354 struct esca_block *new_sca;
1355 struct kvm_vcpu *vcpu;
1356 unsigned int vcpu_idx;
1359 new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
1363 scaoh = (u32)((u64)(new_sca) >> 32);
1364 scaol = (u32)(u64)(new_sca) & ~0x3fU;
1366 kvm_s390_vcpu_block_all(kvm);
1367 write_lock(&kvm->arch.sca_lock);
1369 sca_copy_b_to_e(new_sca, old_sca);
1371 kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
1372 vcpu->arch.sie_block->scaoh = scaoh;
1373 vcpu->arch.sie_block->scaol = scaol;
1374 vcpu->arch.sie_block->ecb2 |= 0x04U;
1376 kvm->arch.sca = new_sca;
1377 kvm->arch.use_esca = 1;
1379 write_unlock(&kvm->arch.sca_lock);
1380 kvm_s390_vcpu_unblock_all(kvm);
1382 free_page((unsigned long)old_sca);
1384 VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
1385 old_sca, kvm->arch.sca);
1389 static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
1393 if (id < KVM_S390_BSCA_CPU_SLOTS)
1398 mutex_lock(&kvm->lock);
1399 rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
1400 mutex_unlock(&kvm->lock);
1402 return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
1405 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1407 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
1408 kvm_clear_async_pf_completion_queue(vcpu);
1409 vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
1415 if (test_kvm_facility(vcpu->kvm, 64))
1416 vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
1417 if (test_kvm_facility(vcpu->kvm, 129))
1418 vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
1420 if (kvm_is_ucontrol(vcpu->kvm))
1421 return __kvm_ucontrol_vcpu_init(vcpu);
1427 * Backs up the current FP/VX register save area on a particular
1428 * destination. Used to switch between different register save
1431 static inline void save_fpu_to(struct fpu *dst)
1433 dst->fpc = current->thread.fpu.fpc;
1434 dst->regs = current->thread.fpu.regs;
1438 * Switches the FP/VX register save area from which to lazy
1439 * restore register contents.
1441 static inline void load_fpu_from(struct fpu *from)
1443 current->thread.fpu.fpc = from->fpc;
1444 current->thread.fpu.regs = from->regs;
1447 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1449 /* Save host register state */
1451 save_fpu_to(&vcpu->arch.host_fpregs);
1453 if (test_kvm_facility(vcpu->kvm, 129)) {
1454 current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
1456 * Use the register save area in the SIE-control block
1457 * for register restore and save in kvm_arch_vcpu_put()
1459 current->thread.fpu.vxrs =
1460 (__vector128 *)&vcpu->run->s.regs.vrs;
1462 load_fpu_from(&vcpu->arch.guest_fpregs);
1464 if (test_fp_ctl(current->thread.fpu.fpc))
1465 /* User space provided an invalid FPC, let's clear it */
1466 current->thread.fpu.fpc = 0;
1468 save_access_regs(vcpu->arch.host_acrs);
1469 restore_access_regs(vcpu->run->s.regs.acrs);
1470 gmap_enable(vcpu->arch.gmap);
1471 atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
1474 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1476 atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
1477 gmap_disable(vcpu->arch.gmap);
1481 if (test_kvm_facility(vcpu->kvm, 129))
1483 * kvm_arch_vcpu_load() set up the register save area to
1484 * the &vcpu->run->s.regs.vrs and, thus, the vector registers
1485 * are already saved. Only the floating-point control must be
1488 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
1490 save_fpu_to(&vcpu->arch.guest_fpregs);
1491 load_fpu_from(&vcpu->arch.host_fpregs);
1493 save_access_regs(vcpu->run->s.regs.acrs);
1494 restore_access_regs(vcpu->arch.host_acrs);
1497 static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
1499 /* this equals initial cpu reset in pop, but we don't switch to ESA */
1500 vcpu->arch.sie_block->gpsw.mask = 0UL;
1501 vcpu->arch.sie_block->gpsw.addr = 0UL;
1502 kvm_s390_set_prefix(vcpu, 0);
1503 vcpu->arch.sie_block->cputm = 0UL;
1504 vcpu->arch.sie_block->ckc = 0UL;
1505 vcpu->arch.sie_block->todpr = 0;
1506 memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
1507 vcpu->arch.sie_block->gcr[0] = 0xE0UL;
1508 vcpu->arch.sie_block->gcr[14] = 0xC2000000UL;
1509 vcpu->arch.guest_fpregs.fpc = 0;
1510 asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc));
1511 vcpu->arch.sie_block->gbea = 1;
1512 vcpu->arch.sie_block->pp = 0;
1513 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
1514 kvm_clear_async_pf_completion_queue(vcpu);
1515 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
1516 kvm_s390_vcpu_stop(vcpu);
1517 kvm_s390_clear_local_irqs(vcpu);
1520 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
1522 mutex_lock(&vcpu->kvm->lock);
1524 vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
1526 mutex_unlock(&vcpu->kvm->lock);
1527 if (!kvm_is_ucontrol(vcpu->kvm)) {
1528 vcpu->arch.gmap = vcpu->kvm->arch.gmap;
1534 static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
1536 if (!test_kvm_facility(vcpu->kvm, 76))
1539 vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);
1541 if (vcpu->kvm->arch.crypto.aes_kw)
1542 vcpu->arch.sie_block->ecb3 |= ECB3_AES;
1543 if (vcpu->kvm->arch.crypto.dea_kw)
1544 vcpu->arch.sie_block->ecb3 |= ECB3_DEA;
1546 vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
1549 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
1551 free_page(vcpu->arch.sie_block->cbrlo);
1552 vcpu->arch.sie_block->cbrlo = 0;
1555 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
1557 vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
1558 if (!vcpu->arch.sie_block->cbrlo)
1561 vcpu->arch.sie_block->ecb2 |= 0x80;
1562 vcpu->arch.sie_block->ecb2 &= ~0x08;
1566 static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
1568 struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
1570 vcpu->arch.cpu_id = model->cpu_id;
1571 vcpu->arch.sie_block->ibc = model->ibc;
1572 vcpu->arch.sie_block->fac = (int) (long) model->fac->list;
1575 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1579 atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
1583 if (test_kvm_facility(vcpu->kvm, 78))
1584 atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags);
1585 else if (test_kvm_facility(vcpu->kvm, 8))
1586 atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);
1588 kvm_s390_vcpu_setup_model(vcpu);
1590 vcpu->arch.sie_block->ecb = 6;
1591 if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73))
1592 vcpu->arch.sie_block->ecb |= 0x10;
1594 vcpu->arch.sie_block->ecb2 = 8;
1595 vcpu->arch.sie_block->eca = 0xC1002000U;
1597 vcpu->arch.sie_block->eca |= 1;
1598 if (sclp.has_sigpif)
1599 vcpu->arch.sie_block->eca |= 0x10000000U;
1600 if (test_kvm_facility(vcpu->kvm, 64))
1601 vcpu->arch.sie_block->ecb3 |= 0x01;
1602 if (test_kvm_facility(vcpu->kvm, 129)) {
1603 vcpu->arch.sie_block->eca |= 0x00020000;
1604 vcpu->arch.sie_block->ecd |= 0x20000000;
1606 vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
1607 vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
1609 if (vcpu->kvm->arch.use_cmma) {
1610 rc = kvm_s390_vcpu_setup_cmma(vcpu);
1614 hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
1615 vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
1617 kvm_s390_vcpu_crypto_setup(vcpu);
1622 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1625 struct kvm_vcpu *vcpu;
1626 struct sie_page *sie_page;
1629 if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
1634 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
1638 sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
1642 vcpu->arch.sie_block = &sie_page->sie_block;
1643 vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
1645 vcpu->arch.sie_block->icpua = id;
1646 spin_lock_init(&vcpu->arch.local_int.lock);
1647 vcpu->arch.local_int.float_int = &kvm->arch.float_int;
1648 vcpu->arch.local_int.wq = &vcpu->wq;
1649 vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags;
1652 * Allocate a save area for floating-point registers. If the vector
1653 * extension is available, register contents are saved in the SIE
1654 * control block. The allocated save area is still required in
1655 * particular places, for example, in kvm_s390_vcpu_store_status().
1657 vcpu->arch.guest_fpregs.fprs = kzalloc(sizeof(freg_t) * __NUM_FPRS,
1659 if (!vcpu->arch.guest_fpregs.fprs)
1660 goto out_free_sie_block;
1662 rc = kvm_vcpu_init(vcpu, kvm, id);
1664 goto out_free_sie_block;
1665 VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu,
1666 vcpu->arch.sie_block);
1667 trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block);
1671 free_page((unsigned long)(vcpu->arch.sie_block));
1673 kmem_cache_free(kvm_vcpu_cache, vcpu);
1678 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1680 return kvm_s390_vcpu_has_irq(vcpu, 0);
1683 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
1685 atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
1689 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
1691 atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
1694 static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
1696 atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
1700 static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
1702 atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
1706 * Kick a guest cpu out of SIE and wait until SIE is not running.
1707 * If the CPU is not running (e.g. waiting as idle) the function will
1708 * return immediately. */
1709 void exit_sie(struct kvm_vcpu *vcpu)
1711 atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
1712 while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
1716 /* Kick a guest cpu out of SIE to process a request synchronously */
1717 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
1719 kvm_make_request(req, vcpu);
1720 kvm_s390_vcpu_request(vcpu);
1723 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address)
1726 struct kvm *kvm = gmap->private;
1727 struct kvm_vcpu *vcpu;
1729 kvm_for_each_vcpu(i, vcpu, kvm) {
1730 /* match against both prefix pages */
1731 if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) {
1732 VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address);
1733 kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
1738 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
1740 /* kvm common code refers to this, but never calls it */
1745 static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
1746 struct kvm_one_reg *reg)
1751 case KVM_REG_S390_TODPR:
1752 r = put_user(vcpu->arch.sie_block->todpr,
1753 (u32 __user *)reg->addr);
1755 case KVM_REG_S390_EPOCHDIFF:
1756 r = put_user(vcpu->arch.sie_block->epoch,
1757 (u64 __user *)reg->addr);
1759 case KVM_REG_S390_CPU_TIMER:
1760 r = put_user(vcpu->arch.sie_block->cputm,
1761 (u64 __user *)reg->addr);
1763 case KVM_REG_S390_CLOCK_COMP:
1764 r = put_user(vcpu->arch.sie_block->ckc,
1765 (u64 __user *)reg->addr);
1767 case KVM_REG_S390_PFTOKEN:
1768 r = put_user(vcpu->arch.pfault_token,
1769 (u64 __user *)reg->addr);
1771 case KVM_REG_S390_PFCOMPARE:
1772 r = put_user(vcpu->arch.pfault_compare,
1773 (u64 __user *)reg->addr);
1775 case KVM_REG_S390_PFSELECT:
1776 r = put_user(vcpu->arch.pfault_select,
1777 (u64 __user *)reg->addr);
1779 case KVM_REG_S390_PP:
1780 r = put_user(vcpu->arch.sie_block->pp,
1781 (u64 __user *)reg->addr);
1783 case KVM_REG_S390_GBEA:
1784 r = put_user(vcpu->arch.sie_block->gbea,
1785 (u64 __user *)reg->addr);
1794 static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
1795 struct kvm_one_reg *reg)
1800 case KVM_REG_S390_TODPR:
1801 r = get_user(vcpu->arch.sie_block->todpr,
1802 (u32 __user *)reg->addr);
1804 case KVM_REG_S390_EPOCHDIFF:
1805 r = get_user(vcpu->arch.sie_block->epoch,
1806 (u64 __user *)reg->addr);
1808 case KVM_REG_S390_CPU_TIMER:
1809 r = get_user(vcpu->arch.sie_block->cputm,
1810 (u64 __user *)reg->addr);
1812 case KVM_REG_S390_CLOCK_COMP:
1813 r = get_user(vcpu->arch.sie_block->ckc,
1814 (u64 __user *)reg->addr);
1816 case KVM_REG_S390_PFTOKEN:
1817 r = get_user(vcpu->arch.pfault_token,
1818 (u64 __user *)reg->addr);
1819 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
1820 kvm_clear_async_pf_completion_queue(vcpu);
1822 case KVM_REG_S390_PFCOMPARE:
1823 r = get_user(vcpu->arch.pfault_compare,
1824 (u64 __user *)reg->addr);
1826 case KVM_REG_S390_PFSELECT:
1827 r = get_user(vcpu->arch.pfault_select,
1828 (u64 __user *)reg->addr);
1830 case KVM_REG_S390_PP:
1831 r = get_user(vcpu->arch.sie_block->pp,
1832 (u64 __user *)reg->addr);
1834 case KVM_REG_S390_GBEA:
1835 r = get_user(vcpu->arch.sie_block->gbea,
1836 (u64 __user *)reg->addr);
1845 static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
1847 kvm_s390_vcpu_initial_reset(vcpu);
1851 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1853 memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs));
1857 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1859 memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
1863 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1864 struct kvm_sregs *sregs)
1866 memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
1867 memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
1868 restore_access_regs(vcpu->run->s.regs.acrs);
1872 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1873 struct kvm_sregs *sregs)
1875 memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
1876 memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
1880 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1882 if (test_fp_ctl(fpu->fpc))
1884 memcpy(vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs));
1885 vcpu->arch.guest_fpregs.fpc = fpu->fpc;
1887 load_fpu_from(&vcpu->arch.guest_fpregs);
1891 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1893 memcpy(&fpu->fprs, vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs));
1894 fpu->fpc = vcpu->arch.guest_fpregs.fpc;
1898 static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
1902 if (!is_vcpu_stopped(vcpu))
1905 vcpu->run->psw_mask = psw.mask;
1906 vcpu->run->psw_addr = psw.addr;
1911 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1912 struct kvm_translation *tr)
1914 return -EINVAL; /* not implemented yet */
1917 #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
1918 KVM_GUESTDBG_USE_HW_BP | \
1919 KVM_GUESTDBG_ENABLE)
1921 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1922 struct kvm_guest_debug *dbg)
1926 vcpu->guest_debug = 0;
1927 kvm_s390_clear_bp_data(vcpu);
1929 if (dbg->control & ~VALID_GUESTDBG_FLAGS)
1932 if (dbg->control & KVM_GUESTDBG_ENABLE) {
1933 vcpu->guest_debug = dbg->control;
1934 /* enforce guest PER */
1935 atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
1937 if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
1938 rc = kvm_s390_import_bp_data(vcpu, dbg);
1940 atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
1941 vcpu->arch.guestdbg.last_bp = 0;
1945 vcpu->guest_debug = 0;
1946 kvm_s390_clear_bp_data(vcpu);
1947 atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
1953 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1954 struct kvm_mp_state *mp_state)
1956 /* CHECK_STOP and LOAD are not supported yet */
1957 return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
1958 KVM_MP_STATE_OPERATING;
1961 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1962 struct kvm_mp_state *mp_state)
1966 /* user space knows about this interface - let it control the state */
1967 vcpu->kvm->arch.user_cpu_state_ctrl = 1;
1969 switch (mp_state->mp_state) {
1970 case KVM_MP_STATE_STOPPED:
1971 kvm_s390_vcpu_stop(vcpu);
1973 case KVM_MP_STATE_OPERATING:
1974 kvm_s390_vcpu_start(vcpu);
1976 case KVM_MP_STATE_LOAD:
1977 case KVM_MP_STATE_CHECK_STOP:
1978 /* fall through - CHECK_STOP and LOAD are not supported yet */
1986 static bool ibs_enabled(struct kvm_vcpu *vcpu)
1988 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS;
1991 static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
1994 kvm_s390_vcpu_request_handled(vcpu);
1995 if (!vcpu->requests)
1998 * We use MMU_RELOAD just to re-arm the ipte notifier for the
1999 * guest prefix page. gmap_ipte_notify will wait on the ptl lock.
2000 * This ensures that the ipte instruction for this request has
2001 * already finished. We might race against a second unmapper that
2002 * wants to set the blocking bit. Lets just retry the request loop.
2004 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
2006 rc = gmap_ipte_notify(vcpu->arch.gmap,
2007 kvm_s390_get_prefix(vcpu),
2014 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
2015 vcpu->arch.sie_block->ihcpu = 0xffff;
2019 if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
2020 if (!ibs_enabled(vcpu)) {
2021 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
2022 atomic_or(CPUSTAT_IBS,
2023 &vcpu->arch.sie_block->cpuflags);
2028 if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
2029 if (ibs_enabled(vcpu)) {
2030 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
2031 atomic_andnot(CPUSTAT_IBS,
2032 &vcpu->arch.sie_block->cpuflags);
2037 /* nothing to do, just clear the request */
2038 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
2043 void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod)
2045 struct kvm_vcpu *vcpu;
2048 mutex_lock(&kvm->lock);
2050 kvm->arch.epoch = tod - get_tod_clock();
2051 kvm_s390_vcpu_block_all(kvm);
2052 kvm_for_each_vcpu(i, vcpu, kvm)
2053 vcpu->arch.sie_block->epoch = kvm->arch.epoch;
2054 kvm_s390_vcpu_unblock_all(kvm);
2056 mutex_unlock(&kvm->lock);
2060 * kvm_arch_fault_in_page - fault-in guest page if necessary
2061 * @vcpu: The corresponding virtual cpu
2062 * @gpa: Guest physical address
2063 * @writable: Whether the page should be writable or not
2065 * Make sure that a guest page has been faulted-in on the host.
2067 * Return: Zero on success, negative error code otherwise.
2069 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
2071 return gmap_fault(vcpu->arch.gmap, gpa,
2072 writable ? FAULT_FLAG_WRITE : 0);
2075 static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
2076 unsigned long token)
2078 struct kvm_s390_interrupt inti;
2079 struct kvm_s390_irq irq;
2082 irq.u.ext.ext_params2 = token;
2083 irq.type = KVM_S390_INT_PFAULT_INIT;
2084 WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
2086 inti.type = KVM_S390_INT_PFAULT_DONE;
2087 inti.parm64 = token;
2088 WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
2092 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
2093 struct kvm_async_pf *work)
2095 trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
2096 __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
2099 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
2100 struct kvm_async_pf *work)
2102 trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
2103 __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
2106 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
2107 struct kvm_async_pf *work)
2109 /* s390 will always inject the page directly */
2112 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
2115 * s390 will always inject the page directly,
2116 * but we still want check_async_completion to cleanup
2121 static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
2124 struct kvm_arch_async_pf arch;
2127 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
2129 if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
2130 vcpu->arch.pfault_compare)
2132 if (psw_extint_disabled(vcpu))
2134 if (kvm_s390_vcpu_has_irq(vcpu, 0))
2136 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
2138 if (!vcpu->arch.gmap->pfault_enabled)
2141 hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
2142 hva += current->thread.gmap_addr & ~PAGE_MASK;
2143 if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
2146 rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
2150 static int vcpu_pre_run(struct kvm_vcpu *vcpu)
2155 * On s390 notifications for arriving pages will be delivered directly
2156 * to the guest but the house keeping for completed pfaults is
2157 * handled outside the worker.
2159 kvm_check_async_pf_completion(vcpu);
2161 vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
2162 vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
2167 if (test_cpu_flag(CIF_MCCK_PENDING))
2170 if (!kvm_is_ucontrol(vcpu->kvm)) {
2171 rc = kvm_s390_deliver_pending_interrupts(vcpu);
2176 rc = kvm_s390_handle_requests(vcpu);
2180 if (guestdbg_enabled(vcpu)) {
2181 kvm_s390_backup_guest_per_regs(vcpu);
2182 kvm_s390_patch_guest_per_regs(vcpu);
2185 vcpu->arch.sie_block->icptcode = 0;
2186 cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
2187 VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
2188 trace_kvm_s390_sie_enter(vcpu, cpuflags);
2193 static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
2195 psw_t *psw = &vcpu->arch.sie_block->gpsw;
2199 VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
2200 trace_kvm_s390_sie_fault(vcpu);
2203 * We want to inject an addressing exception, which is defined as a
2204 * suppressing or terminating exception. However, since we came here
2205 * by a DAT access exception, the PSW still points to the faulting
2206 * instruction since DAT exceptions are nullifying. So we've got
2207 * to look up the current opcode to get the length of the instruction
2208 * to be able to forward the PSW.
2210 rc = read_guest(vcpu, psw->addr, 0, &opcode, 1);
2212 return kvm_s390_inject_prog_cond(vcpu, rc);
2213 psw->addr = __rewind_psw(*psw, -insn_length(opcode));
2215 return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
2218 static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
2220 VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
2221 vcpu->arch.sie_block->icptcode);
2222 trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
2224 if (guestdbg_enabled(vcpu))
2225 kvm_s390_restore_guest_per_regs(vcpu);
2227 vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
2228 vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
2230 if (vcpu->arch.sie_block->icptcode > 0) {
2231 int rc = kvm_handle_sie_intercept(vcpu);
2233 if (rc != -EOPNOTSUPP)
2235 vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
2236 vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
2237 vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
2238 vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
2240 } else if (exit_reason != -EFAULT) {
2241 vcpu->stat.exit_null++;
2243 } else if (kvm_is_ucontrol(vcpu->kvm)) {
2244 vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
2245 vcpu->run->s390_ucontrol.trans_exc_code =
2246 current->thread.gmap_addr;
2247 vcpu->run->s390_ucontrol.pgm_code = 0x10;
2249 } else if (current->thread.gmap_pfault) {
2250 trace_kvm_s390_major_guest_pfault(vcpu);
2251 current->thread.gmap_pfault = 0;
2252 if (kvm_arch_setup_async_pf(vcpu))
2254 return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
2256 return vcpu_post_run_fault_in_sie(vcpu);
2259 static int __vcpu_run(struct kvm_vcpu *vcpu)
2261 int rc, exit_reason;
2264 * We try to hold kvm->srcu during most of vcpu_run (except when run-
2265 * ning the guest), so that memslots (and other stuff) are protected
2267 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2270 rc = vcpu_pre_run(vcpu);
2274 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
2276 * As PF_VCPU will be used in fault handler, between
2277 * guest_enter and guest_exit should be no uaccess.
2279 local_irq_disable();
2280 __kvm_guest_enter();
2282 exit_reason = sie64a(vcpu->arch.sie_block,
2283 vcpu->run->s.regs.gprs);
2284 local_irq_disable();
2287 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2289 rc = vcpu_post_run(vcpu, exit_reason);
2290 } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
2292 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
2296 static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2298 vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
2299 vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
2300 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
2301 kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
2302 if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
2303 memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
2304 /* some control register changes require a tlb flush */
2305 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2307 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
2308 vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm;
2309 vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
2310 vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
2311 vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
2312 vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
2314 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
2315 vcpu->arch.pfault_token = kvm_run->s.regs.pft;
2316 vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
2317 vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
2318 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
2319 kvm_clear_async_pf_completion_queue(vcpu);
2321 kvm_run->kvm_dirty_regs = 0;
2324 static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2326 kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
2327 kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
2328 kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
2329 memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
2330 kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm;
2331 kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
2332 kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
2333 kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
2334 kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
2335 kvm_run->s.regs.pft = vcpu->arch.pfault_token;
2336 kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
2337 kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
2340 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2345 if (guestdbg_exit_pending(vcpu)) {
2346 kvm_s390_prepare_debug_exit(vcpu);
2350 if (vcpu->sigset_active)
2351 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2353 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
2354 kvm_s390_vcpu_start(vcpu);
2355 } else if (is_vcpu_stopped(vcpu)) {
2356 pr_err_ratelimited("can't run stopped vcpu %d\n",
2361 sync_regs(vcpu, kvm_run);
2364 rc = __vcpu_run(vcpu);
2366 if (signal_pending(current) && !rc) {
2367 kvm_run->exit_reason = KVM_EXIT_INTR;
2371 if (guestdbg_exit_pending(vcpu) && !rc) {
2372 kvm_s390_prepare_debug_exit(vcpu);
2376 if (rc == -EREMOTE) {
2377 /* userspace support is needed, kvm_run has been prepared */
2381 store_regs(vcpu, kvm_run);
2383 if (vcpu->sigset_active)
2384 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2386 vcpu->stat.exit_userspace++;
2391 * store status at address
2392 * we use have two special cases:
2393 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
2394 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
2396 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
2398 unsigned char archmode = 1;
2403 px = kvm_s390_get_prefix(vcpu);
2404 if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
2405 if (write_guest_abs(vcpu, 163, &archmode, 1))
2408 } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
2409 if (write_guest_real(vcpu, 163, &archmode, 1))
2413 gpa -= __LC_FPREGS_SAVE_AREA;
2414 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
2415 vcpu->arch.guest_fpregs.fprs, 128);
2416 rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
2417 vcpu->run->s.regs.gprs, 128);
2418 rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
2419 &vcpu->arch.sie_block->gpsw, 16);
2420 rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
2422 rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
2423 &vcpu->arch.guest_fpregs.fpc, 4);
2424 rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
2425 &vcpu->arch.sie_block->todpr, 4);
2426 rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
2427 &vcpu->arch.sie_block->cputm, 8);
2428 clkcomp = vcpu->arch.sie_block->ckc >> 8;
2429 rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
2431 rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
2432 &vcpu->run->s.regs.acrs, 64);
2433 rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
2434 &vcpu->arch.sie_block->gcr, 128);
2435 return rc ? -EFAULT : 0;
2438 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
2441 * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
2442 * copying in vcpu load/put. Lets update our copies before we save
2443 * it into the save area
2446 if (test_kvm_facility(vcpu->kvm, 129)) {
2448 * If the vector extension is available, the vector registers
2449 * which overlaps with floating-point registers are saved in
2450 * the SIE-control block. Hence, extract the floating-point
2451 * registers and the FPC value and store them in the
2452 * guest_fpregs structure.
2454 vcpu->arch.guest_fpregs.fpc = current->thread.fpu.fpc;
2455 convert_vx_to_fp(vcpu->arch.guest_fpregs.fprs,
2456 current->thread.fpu.vxrs);
2458 save_fpu_to(&vcpu->arch.guest_fpregs);
2459 save_access_regs(vcpu->run->s.regs.acrs);
2461 return kvm_s390_store_status_unloaded(vcpu, addr);
2465 * store additional status at address
2467 int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
2470 /* Only bits 0-53 are used for address formation */
2471 if (!(gpa & ~0x3ff))
2474 return write_guest_abs(vcpu, gpa & ~0x3ff,
2475 (void *)&vcpu->run->s.regs.vrs, 512);
2478 int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr)
2480 if (!test_kvm_facility(vcpu->kvm, 129))
2484 * The guest VXRS are in the host VXRs due to the lazy
2485 * copying in vcpu load/put. We can simply call save_fpu_regs()
2486 * to save the current register state because we are in the
2487 * middle of a load/put cycle.
2489 * Let's update our copies before we save it into the save area.
2493 return kvm_s390_store_adtl_status_unloaded(vcpu, addr);
2496 static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
2498 kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
2499 kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
2502 static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
2505 struct kvm_vcpu *vcpu;
2507 kvm_for_each_vcpu(i, vcpu, kvm) {
2508 __disable_ibs_on_vcpu(vcpu);
2512 static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
2514 kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
2515 kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
2518 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
2520 int i, online_vcpus, started_vcpus = 0;
2522 if (!is_vcpu_stopped(vcpu))
2525 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
2526 /* Only one cpu at a time may enter/leave the STOPPED state. */
2527 spin_lock(&vcpu->kvm->arch.start_stop_lock);
2528 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
2530 for (i = 0; i < online_vcpus; i++) {
2531 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
2535 if (started_vcpus == 0) {
2536 /* we're the only active VCPU -> speed it up */
2537 __enable_ibs_on_vcpu(vcpu);
2538 } else if (started_vcpus == 1) {
2540 * As we are starting a second VCPU, we have to disable
2541 * the IBS facility on all VCPUs to remove potentially
2542 * oustanding ENABLE requests.
2544 __disable_ibs_on_all_vcpus(vcpu->kvm);
2547 atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
2549 * Another VCPU might have used IBS while we were offline.
2550 * Let's play safe and flush the VCPU at startup.
2552 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
2553 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
2557 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
2559 int i, online_vcpus, started_vcpus = 0;
2560 struct kvm_vcpu *started_vcpu = NULL;
2562 if (is_vcpu_stopped(vcpu))
2565 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
2566 /* Only one cpu at a time may enter/leave the STOPPED state. */
2567 spin_lock(&vcpu->kvm->arch.start_stop_lock);
2568 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
2570 /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
2571 kvm_s390_clear_stop_irq(vcpu);
2573 atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
2574 __disable_ibs_on_vcpu(vcpu);
2576 for (i = 0; i < online_vcpus; i++) {
2577 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
2579 started_vcpu = vcpu->kvm->vcpus[i];
2583 if (started_vcpus == 1) {
2585 * As we only have one VCPU left, we want to enable the
2586 * IBS facility for that VCPU to speed it up.
2588 __enable_ibs_on_vcpu(started_vcpu);
2591 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
2595 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
2596 struct kvm_enable_cap *cap)
2604 case KVM_CAP_S390_CSS_SUPPORT:
2605 if (!vcpu->kvm->arch.css_support) {
2606 vcpu->kvm->arch.css_support = 1;
2607 VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
2608 trace_kvm_s390_enable_css(vcpu->kvm);
2619 static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
2620 struct kvm_s390_mem_op *mop)
2622 void __user *uaddr = (void __user *)mop->buf;
2623 void *tmpbuf = NULL;
2625 const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
2626 | KVM_S390_MEMOP_F_CHECK_ONLY;
2628 if (mop->flags & ~supported_flags)
2631 if (mop->size > MEM_OP_MAX_SIZE)
2634 if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
2635 tmpbuf = vmalloc(mop->size);
2640 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2643 case KVM_S390_MEMOP_LOGICAL_READ:
2644 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
2645 r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, false);
2648 r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
2650 if (copy_to_user(uaddr, tmpbuf, mop->size))
2654 case KVM_S390_MEMOP_LOGICAL_WRITE:
2655 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
2656 r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, true);
2659 if (copy_from_user(tmpbuf, uaddr, mop->size)) {
2663 r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
2669 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
2671 if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
2672 kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
2678 long kvm_arch_vcpu_ioctl(struct file *filp,
2679 unsigned int ioctl, unsigned long arg)
2681 struct kvm_vcpu *vcpu = filp->private_data;
2682 void __user *argp = (void __user *)arg;
2687 case KVM_S390_IRQ: {
2688 struct kvm_s390_irq s390irq;
2691 if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
2693 r = kvm_s390_inject_vcpu(vcpu, &s390irq);
2696 case KVM_S390_INTERRUPT: {
2697 struct kvm_s390_interrupt s390int;
2698 struct kvm_s390_irq s390irq;
2701 if (copy_from_user(&s390int, argp, sizeof(s390int)))
2703 if (s390int_to_s390irq(&s390int, &s390irq))
2705 r = kvm_s390_inject_vcpu(vcpu, &s390irq);
2708 case KVM_S390_STORE_STATUS:
2709 idx = srcu_read_lock(&vcpu->kvm->srcu);
2710 r = kvm_s390_vcpu_store_status(vcpu, arg);
2711 srcu_read_unlock(&vcpu->kvm->srcu, idx);
2713 case KVM_S390_SET_INITIAL_PSW: {
2717 if (copy_from_user(&psw, argp, sizeof(psw)))
2719 r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
2722 case KVM_S390_INITIAL_RESET:
2723 r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
2725 case KVM_SET_ONE_REG:
2726 case KVM_GET_ONE_REG: {
2727 struct kvm_one_reg reg;
2729 if (copy_from_user(®, argp, sizeof(reg)))
2731 if (ioctl == KVM_SET_ONE_REG)
2732 r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®);
2734 r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®);
2737 #ifdef CONFIG_KVM_S390_UCONTROL
2738 case KVM_S390_UCAS_MAP: {
2739 struct kvm_s390_ucas_mapping ucasmap;
2741 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
2746 if (!kvm_is_ucontrol(vcpu->kvm)) {
2751 r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
2752 ucasmap.vcpu_addr, ucasmap.length);
2755 case KVM_S390_UCAS_UNMAP: {
2756 struct kvm_s390_ucas_mapping ucasmap;
2758 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
2763 if (!kvm_is_ucontrol(vcpu->kvm)) {
2768 r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
2773 case KVM_S390_VCPU_FAULT: {
2774 r = gmap_fault(vcpu->arch.gmap, arg, 0);
2777 case KVM_ENABLE_CAP:
2779 struct kvm_enable_cap cap;
2781 if (copy_from_user(&cap, argp, sizeof(cap)))
2783 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2786 case KVM_S390_MEM_OP: {
2787 struct kvm_s390_mem_op mem_op;
2789 if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
2790 r = kvm_s390_guest_mem_op(vcpu, &mem_op);
2795 case KVM_S390_SET_IRQ_STATE: {
2796 struct kvm_s390_irq_state irq_state;
2799 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
2801 if (irq_state.len > VCPU_IRQS_MAX_BUF ||
2802 irq_state.len == 0 ||
2803 irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
2807 r = kvm_s390_set_irq_state(vcpu,
2808 (void __user *) irq_state.buf,
2812 case KVM_S390_GET_IRQ_STATE: {
2813 struct kvm_s390_irq_state irq_state;
2816 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
2818 if (irq_state.len == 0) {
2822 r = kvm_s390_get_irq_state(vcpu,
2823 (__u8 __user *) irq_state.buf,
2833 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2835 #ifdef CONFIG_KVM_S390_UCONTROL
2836 if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
2837 && (kvm_is_ucontrol(vcpu->kvm))) {
2838 vmf->page = virt_to_page(vcpu->arch.sie_block);
2839 get_page(vmf->page);
2843 return VM_FAULT_SIGBUS;
2846 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
2847 unsigned long npages)
2852 /* Section: memory related */
2853 int kvm_arch_prepare_memory_region(struct kvm *kvm,
2854 struct kvm_memory_slot *memslot,
2855 const struct kvm_userspace_memory_region *mem,
2856 enum kvm_mr_change change)
2858 /* A few sanity checks. We can have memory slots which have to be
2859 located/ended at a segment boundary (1MB). The memory in userland is
2860 ok to be fragmented into various different vmas. It is okay to mmap()
2861 and munmap() stuff in this slot after doing this call at any time */
2863 if (mem->userspace_addr & 0xffffful)
2866 if (mem->memory_size & 0xffffful)
2869 if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
2875 void kvm_arch_commit_memory_region(struct kvm *kvm,
2876 const struct kvm_userspace_memory_region *mem,
2877 const struct kvm_memory_slot *old,
2878 const struct kvm_memory_slot *new,
2879 enum kvm_mr_change change)
2883 /* If the basics of the memslot do not change, we do not want
2884 * to update the gmap. Every update causes several unnecessary
2885 * segment translation exceptions. This is usually handled just
2886 * fine by the normal fault handler + gmap, but it will also
2887 * cause faults on the prefix page of running guest CPUs.
2889 if (old->userspace_addr == mem->userspace_addr &&
2890 old->base_gfn * PAGE_SIZE == mem->guest_phys_addr &&
2891 old->npages * PAGE_SIZE == mem->memory_size)
2894 rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
2895 mem->guest_phys_addr, mem->memory_size);
2897 pr_warn("failed to commit memory region\n");
2901 static int __init kvm_s390_init(void)
2903 if (!sclp.has_sief2) {
2904 pr_info("SIE not available\n");
2908 return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
2911 static void __exit kvm_s390_exit(void)
2916 module_init(kvm_s390_init);
2917 module_exit(kvm_s390_exit);
2920 * Enable autoloading of the kvm module.
2921 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
2922 * since x86 takes a different approach.
2924 #include <linux/miscdevice.h>
2925 MODULE_ALIAS_MISCDEV(KVM_MINOR);
2926 MODULE_ALIAS("devname:kvm");