Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1 | /* |
Heiko Carstens | a53c8fa | 2012-07-20 11:15:04 +0200 | [diff] [blame] | 2 | * hosting zSeries kernel virtual machines |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 3 | * |
Heiko Carstens | a53c8fa | 2012-07-20 11:15:04 +0200 | [diff] [blame] | 4 | * Copyright IBM Corp. 2008, 2009 |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 5 | * |
| 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. |
| 9 | * |
| 10 | * Author(s): Carsten Otte <cotte@de.ibm.com> |
| 11 | * Christian Borntraeger <borntraeger@de.ibm.com> |
| 12 | * Heiko Carstens <heiko.carstens@de.ibm.com> |
Christian Ehrhardt | 628eb9b | 2009-05-25 13:40:51 +0200 | [diff] [blame] | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
Jason J. Herne | 15f36eb | 2012-08-02 10:10:17 -0400 | [diff] [blame] | 14 | * Jason J. Herne <jjherne@us.ibm.com> |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 15 | */ |
| 16 | |
| 17 | #include <linux/compiler.h> |
| 18 | #include <linux/err.h> |
| 19 | #include <linux/fs.h> |
Christian Borntraeger | ca87230 | 2009-05-12 17:21:49 +0200 | [diff] [blame] | 20 | #include <linux/hrtimer.h> |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 21 | #include <linux/init.h> |
| 22 | #include <linux/kvm.h> |
| 23 | #include <linux/kvm_host.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/slab.h> |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 26 | #include <linux/timer.h> |
Heiko Carstens | cbb870c | 2010-02-26 22:37:43 +0100 | [diff] [blame] | 27 | #include <asm/asm-offsets.h> |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 28 | #include <asm/lowcore.h> |
| 29 | #include <asm/pgtable.h> |
Heiko Carstens | f5daba1 | 2009-03-26 15:24:01 +0100 | [diff] [blame] | 30 | #include <asm/nmi.h> |
David Howells | a0616cd | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 31 | #include <asm/switch_to.h> |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 32 | #include <asm/facility.h> |
Christian Borntraeger | 1526bf9 | 2012-05-15 14:15:25 +0200 | [diff] [blame] | 33 | #include <asm/sclp.h> |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 34 | #include "kvm-s390.h" |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 35 | #include "gaccess.h" |
| 36 | |
Cornelia Huck | 5786fff | 2012-07-23 17:20:29 +0200 | [diff] [blame] | 37 | #define CREATE_TRACE_POINTS |
| 38 | #include "trace.h" |
Cornelia Huck | ade38c3 | 2012-07-23 17:20:30 +0200 | [diff] [blame] | 39 | #include "trace-s390.h" |
Cornelia Huck | 5786fff | 2012-07-23 17:20:29 +0200 | [diff] [blame] | 40 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 41 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
| 42 | |
| 43 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
| 44 | { "userspace_handled", VCPU_STAT(exit_userspace) }, |
Christian Borntraeger | 0eaeafa | 2008-05-07 09:22:53 +0200 | [diff] [blame] | 45 | { "exit_null", VCPU_STAT(exit_null) }, |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 46 | { "exit_validity", VCPU_STAT(exit_validity) }, |
| 47 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, |
| 48 | { "exit_external_request", VCPU_STAT(exit_external_request) }, |
| 49 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 50 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
| 51 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, |
| 52 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, |
Christian Borntraeger | f5e10b0 | 2008-07-25 15:52:44 +0200 | [diff] [blame] | 53 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 54 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
David Hildenbrand | aba0750 | 2014-01-23 10:47:13 +0100 | [diff] [blame] | 55 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
| 56 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 57 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
Christian Ehrhardt | 7697e71f | 2011-10-18 12:27:15 +0200 | [diff] [blame] | 58 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 59 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
| 60 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, |
| 61 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, |
| 62 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, |
| 63 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, |
| 64 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, |
| 65 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, |
Christian Borntraeger | 69d0d3a | 2013-06-12 13:54:53 +0200 | [diff] [blame] | 66 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
Christian Borntraeger | 453423d | 2008-03-25 18:47:29 +0100 | [diff] [blame] | 67 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
| 68 | { "instruction_spx", VCPU_STAT(instruction_spx) }, |
| 69 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, |
| 70 | { "instruction_stap", VCPU_STAT(instruction_stap) }, |
| 71 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, |
Heiko Carstens | 8a242234 | 2014-01-10 14:33:28 +0100 | [diff] [blame] | 72 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
Christian Borntraeger | 453423d | 2008-03-25 18:47:29 +0100 | [diff] [blame] | 73 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
| 74 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 75 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
Christian Borntraeger | 453423d | 2008-03-25 18:47:29 +0100 | [diff] [blame] | 76 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
| 77 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, |
Christian Borntraeger | bb25b9b | 2011-07-24 10:48:17 +0200 | [diff] [blame] | 78 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
Christian Borntraeger | 5288fbf | 2008-03-25 18:47:31 +0100 | [diff] [blame] | 79 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
Cornelia Huck | bd59d3a | 2011-11-17 11:00:42 +0100 | [diff] [blame] | 80 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
Christian Ehrhardt | 7697e71f | 2011-10-18 12:27:15 +0200 | [diff] [blame] | 81 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
Christian Borntraeger | 5288fbf | 2008-03-25 18:47:31 +0100 | [diff] [blame] | 82 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
| 83 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
| 84 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
| 85 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, |
| 86 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, |
Christian Borntraeger | 388186b | 2011-10-30 15:17:03 +0100 | [diff] [blame] | 87 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
Christian Borntraeger | e28acfe | 2008-03-25 18:47:34 +0100 | [diff] [blame] | 88 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 89 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 90 | { NULL } |
| 91 | }; |
| 92 | |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 93 | unsigned long *vfacilities; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 94 | static struct gmap_notifier gmap_notifier; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 95 | |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 96 | /* test availability of vfacility */ |
Heiko Carstens | 280ef0f | 2013-12-17 09:08:28 +0100 | [diff] [blame] | 97 | int test_vfacility(unsigned long nr) |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 98 | { |
| 99 | return __test_facility(nr, (void *) vfacilities); |
| 100 | } |
| 101 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 102 | /* Section: not file related */ |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 103 | int kvm_arch_hardware_enable(void *garbage) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 104 | { |
| 105 | /* every s390 is virtualization enabled ;-) */ |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 106 | return 0; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | void kvm_arch_hardware_disable(void *garbage) |
| 110 | { |
| 111 | } |
| 112 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 113 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
| 114 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 115 | int kvm_arch_hardware_setup(void) |
| 116 | { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 117 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
| 118 | gmap_register_ipte_notifier(&gmap_notifier); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | void kvm_arch_hardware_unsetup(void) |
| 123 | { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 124 | gmap_unregister_ipte_notifier(&gmap_notifier); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | void kvm_arch_check_processor_compat(void *rtn) |
| 128 | { |
| 129 | } |
| 130 | |
| 131 | int kvm_arch_init(void *opaque) |
| 132 | { |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | void kvm_arch_exit(void) |
| 137 | { |
| 138 | } |
| 139 | |
| 140 | /* Section: device related */ |
| 141 | long kvm_arch_dev_ioctl(struct file *filp, |
| 142 | unsigned int ioctl, unsigned long arg) |
| 143 | { |
| 144 | if (ioctl == KVM_S390_ENABLE_SIE) |
| 145 | return s390_enable_sie(); |
| 146 | return -EINVAL; |
| 147 | } |
| 148 | |
| 149 | int kvm_dev_ioctl_check_extension(long ext) |
| 150 | { |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 151 | int r; |
| 152 | |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 153 | switch (ext) { |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 154 | case KVM_CAP_S390_PSW: |
Christian Borntraeger | b6cf878 | 2011-09-20 17:07:29 +0200 | [diff] [blame] | 155 | case KVM_CAP_S390_GMAP: |
Christian Borntraeger | 52e16b1 | 2011-11-17 11:00:44 +0100 | [diff] [blame] | 156 | case KVM_CAP_SYNC_MMU: |
Carsten Otte | 1efd0f5 | 2012-01-04 10:25:29 +0100 | [diff] [blame] | 157 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 158 | case KVM_CAP_S390_UCONTROL: |
| 159 | #endif |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 160 | case KVM_CAP_ASYNC_PF: |
Christian Borntraeger | 60b413c | 2012-01-11 11:20:31 +0100 | [diff] [blame] | 161 | case KVM_CAP_SYNC_REGS: |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 162 | case KVM_CAP_ONE_REG: |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 163 | case KVM_CAP_ENABLE_CAP: |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 164 | case KVM_CAP_S390_CSS_SUPPORT: |
Cornelia Huck | 10ccaa1 | 2013-02-28 12:33:21 +0100 | [diff] [blame] | 165 | case KVM_CAP_IOEVENTFD: |
Jens Freimann | c05c418 | 2013-10-07 16:13:45 +0200 | [diff] [blame] | 166 | case KVM_CAP_DEVICE_CTRL: |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 167 | case KVM_CAP_ENABLE_CAP_VM: |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 168 | case KVM_CAP_VM_ATTRIBUTES: |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 169 | r = 1; |
| 170 | break; |
Christian Borntraeger | e726b1b | 2012-05-02 10:50:38 +0200 | [diff] [blame] | 171 | case KVM_CAP_NR_VCPUS: |
| 172 | case KVM_CAP_MAX_VCPUS: |
| 173 | r = KVM_MAX_VCPUS; |
| 174 | break; |
Nick Wang | e1e2e60 | 2013-03-25 17:22:58 +0100 | [diff] [blame] | 175 | case KVM_CAP_NR_MEMSLOTS: |
| 176 | r = KVM_USER_MEM_SLOTS; |
| 177 | break; |
Christian Borntraeger | 1526bf9 | 2012-05-15 14:15:25 +0200 | [diff] [blame] | 178 | case KVM_CAP_S390_COW: |
Martin Schwidefsky | abf09be | 2012-11-07 13:17:37 +0100 | [diff] [blame] | 179 | r = MACHINE_HAS_ESOP; |
Christian Borntraeger | 1526bf9 | 2012-05-15 14:15:25 +0200 | [diff] [blame] | 180 | break; |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 181 | default: |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 182 | r = 0; |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 183 | } |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 184 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 185 | } |
| 186 | |
Jason J. Herne | 15f36eb | 2012-08-02 10:10:17 -0400 | [diff] [blame] | 187 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
| 188 | struct kvm_memory_slot *memslot) |
| 189 | { |
| 190 | gfn_t cur_gfn, last_gfn; |
| 191 | unsigned long address; |
| 192 | struct gmap *gmap = kvm->arch.gmap; |
| 193 | |
| 194 | down_read(&gmap->mm->mmap_sem); |
| 195 | /* Loop over all guest pages */ |
| 196 | last_gfn = memslot->base_gfn + memslot->npages; |
| 197 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { |
| 198 | address = gfn_to_hva_memslot(memslot, cur_gfn); |
| 199 | |
| 200 | if (gmap_test_and_clear_dirty(address, gmap)) |
| 201 | mark_page_dirty(kvm, cur_gfn); |
| 202 | } |
| 203 | up_read(&gmap->mm->mmap_sem); |
| 204 | } |
| 205 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 206 | /* Section: vm related */ |
| 207 | /* |
| 208 | * Get (and clear) the dirty memory log for a memory slot. |
| 209 | */ |
| 210 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| 211 | struct kvm_dirty_log *log) |
| 212 | { |
Jason J. Herne | 15f36eb | 2012-08-02 10:10:17 -0400 | [diff] [blame] | 213 | int r; |
| 214 | unsigned long n; |
| 215 | struct kvm_memory_slot *memslot; |
| 216 | int is_dirty = 0; |
| 217 | |
| 218 | mutex_lock(&kvm->slots_lock); |
| 219 | |
| 220 | r = -EINVAL; |
| 221 | if (log->slot >= KVM_USER_MEM_SLOTS) |
| 222 | goto out; |
| 223 | |
| 224 | memslot = id_to_memslot(kvm->memslots, log->slot); |
| 225 | r = -ENOENT; |
| 226 | if (!memslot->dirty_bitmap) |
| 227 | goto out; |
| 228 | |
| 229 | kvm_s390_sync_dirty_log(kvm, memslot); |
| 230 | r = kvm_get_dirty_log(kvm, log, &is_dirty); |
| 231 | if (r) |
| 232 | goto out; |
| 233 | |
| 234 | /* Clear the dirty log */ |
| 235 | if (is_dirty) { |
| 236 | n = kvm_dirty_bitmap_bytes(memslot); |
| 237 | memset(memslot->dirty_bitmap, 0, n); |
| 238 | } |
| 239 | r = 0; |
| 240 | out: |
| 241 | mutex_unlock(&kvm->slots_lock); |
| 242 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 243 | } |
| 244 | |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 245 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
| 246 | { |
| 247 | int r; |
| 248 | |
| 249 | if (cap->flags) |
| 250 | return -EINVAL; |
| 251 | |
| 252 | switch (cap->cap) { |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 253 | case KVM_CAP_S390_IRQCHIP: |
| 254 | kvm->arch.use_irqchip = 1; |
| 255 | r = 0; |
| 256 | break; |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 257 | default: |
| 258 | r = -EINVAL; |
| 259 | break; |
| 260 | } |
| 261 | return r; |
| 262 | } |
| 263 | |
Dominik Dingel | 4f718ea | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 264 | static int kvm_s390_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
| 265 | { |
| 266 | int ret; |
| 267 | unsigned int idx; |
| 268 | switch (attr->attr) { |
| 269 | case KVM_S390_VM_MEM_ENABLE_CMMA: |
| 270 | ret = -EBUSY; |
| 271 | mutex_lock(&kvm->lock); |
| 272 | if (atomic_read(&kvm->online_vcpus) == 0) { |
| 273 | kvm->arch.use_cmma = 1; |
| 274 | ret = 0; |
| 275 | } |
| 276 | mutex_unlock(&kvm->lock); |
| 277 | break; |
| 278 | case KVM_S390_VM_MEM_CLR_CMMA: |
| 279 | mutex_lock(&kvm->lock); |
| 280 | idx = srcu_read_lock(&kvm->srcu); |
| 281 | page_table_reset_pgste(kvm->arch.gmap->mm, 0, TASK_SIZE, false); |
| 282 | srcu_read_unlock(&kvm->srcu, idx); |
| 283 | mutex_unlock(&kvm->lock); |
| 284 | ret = 0; |
| 285 | break; |
| 286 | default: |
| 287 | ret = -ENXIO; |
| 288 | break; |
| 289 | } |
| 290 | return ret; |
| 291 | } |
| 292 | |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 293 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| 294 | { |
| 295 | int ret; |
| 296 | |
| 297 | switch (attr->group) { |
Dominik Dingel | 4f718ea | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 298 | case KVM_S390_VM_MEM_CTRL: |
| 299 | ret = kvm_s390_mem_control(kvm, attr); |
| 300 | break; |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 301 | default: |
| 302 | ret = -ENXIO; |
| 303 | break; |
| 304 | } |
| 305 | |
| 306 | return ret; |
| 307 | } |
| 308 | |
| 309 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| 310 | { |
| 311 | return -ENXIO; |
| 312 | } |
| 313 | |
| 314 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| 315 | { |
| 316 | int ret; |
| 317 | |
| 318 | switch (attr->group) { |
Dominik Dingel | 4f718ea | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 319 | case KVM_S390_VM_MEM_CTRL: |
| 320 | switch (attr->attr) { |
| 321 | case KVM_S390_VM_MEM_ENABLE_CMMA: |
| 322 | case KVM_S390_VM_MEM_CLR_CMMA: |
| 323 | ret = 0; |
| 324 | break; |
| 325 | default: |
| 326 | ret = -ENXIO; |
| 327 | break; |
| 328 | } |
| 329 | break; |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 330 | default: |
| 331 | ret = -ENXIO; |
| 332 | break; |
| 333 | } |
| 334 | |
| 335 | return ret; |
| 336 | } |
| 337 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 338 | long kvm_arch_vm_ioctl(struct file *filp, |
| 339 | unsigned int ioctl, unsigned long arg) |
| 340 | { |
| 341 | struct kvm *kvm = filp->private_data; |
| 342 | void __user *argp = (void __user *)arg; |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 343 | struct kvm_device_attr attr; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 344 | int r; |
| 345 | |
| 346 | switch (ioctl) { |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 347 | case KVM_S390_INTERRUPT: { |
| 348 | struct kvm_s390_interrupt s390int; |
| 349 | |
| 350 | r = -EFAULT; |
| 351 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
| 352 | break; |
| 353 | r = kvm_s390_inject_vm(kvm, &s390int); |
| 354 | break; |
| 355 | } |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 356 | case KVM_ENABLE_CAP: { |
| 357 | struct kvm_enable_cap cap; |
| 358 | r = -EFAULT; |
| 359 | if (copy_from_user(&cap, argp, sizeof(cap))) |
| 360 | break; |
| 361 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); |
| 362 | break; |
| 363 | } |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 364 | case KVM_CREATE_IRQCHIP: { |
| 365 | struct kvm_irq_routing_entry routing; |
| 366 | |
| 367 | r = -EINVAL; |
| 368 | if (kvm->arch.use_irqchip) { |
| 369 | /* Set up dummy routing. */ |
| 370 | memset(&routing, 0, sizeof(routing)); |
| 371 | kvm_set_irq_routing(kvm, &routing, 0, 0); |
| 372 | r = 0; |
| 373 | } |
| 374 | break; |
| 375 | } |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 376 | case KVM_SET_DEVICE_ATTR: { |
| 377 | r = -EFAULT; |
| 378 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| 379 | break; |
| 380 | r = kvm_s390_vm_set_attr(kvm, &attr); |
| 381 | break; |
| 382 | } |
| 383 | case KVM_GET_DEVICE_ATTR: { |
| 384 | r = -EFAULT; |
| 385 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| 386 | break; |
| 387 | r = kvm_s390_vm_get_attr(kvm, &attr); |
| 388 | break; |
| 389 | } |
| 390 | case KVM_HAS_DEVICE_ATTR: { |
| 391 | r = -EFAULT; |
| 392 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| 393 | break; |
| 394 | r = kvm_s390_vm_has_attr(kvm, &attr); |
| 395 | break; |
| 396 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 397 | default: |
Avi Kivity | 367e131 | 2009-08-26 14:57:07 +0300 | [diff] [blame] | 398 | r = -ENOTTY; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | return r; |
| 402 | } |
| 403 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 404 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 405 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 406 | int rc; |
| 407 | char debug_name[16]; |
Christian Borntraeger | f6c137f | 2014-03-19 11:18:29 +0100 | [diff] [blame] | 408 | static unsigned long sca_offset; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 409 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 410 | rc = -EINVAL; |
| 411 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 412 | if (type & ~KVM_VM_S390_UCONTROL) |
| 413 | goto out_err; |
| 414 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) |
| 415 | goto out_err; |
| 416 | #else |
| 417 | if (type) |
| 418 | goto out_err; |
| 419 | #endif |
| 420 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 421 | rc = s390_enable_sie(); |
| 422 | if (rc) |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 423 | goto out_err; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 424 | |
Carsten Otte | b290411 | 2011-10-18 12:27:13 +0200 | [diff] [blame] | 425 | rc = -ENOMEM; |
| 426 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 427 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
| 428 | if (!kvm->arch.sca) |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 429 | goto out_err; |
Christian Borntraeger | f6c137f | 2014-03-19 11:18:29 +0100 | [diff] [blame] | 430 | spin_lock(&kvm_lock); |
| 431 | sca_offset = (sca_offset + 16) & 0x7f0; |
| 432 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); |
| 433 | spin_unlock(&kvm_lock); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 434 | |
| 435 | sprintf(debug_name, "kvm-%u", current->pid); |
| 436 | |
| 437 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); |
| 438 | if (!kvm->arch.dbf) |
| 439 | goto out_nodbf; |
| 440 | |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 441 | spin_lock_init(&kvm->arch.float_int.lock); |
| 442 | INIT_LIST_HEAD(&kvm->arch.float_int.list); |
Heiko Carstens | 8a242234 | 2014-01-10 14:33:28 +0100 | [diff] [blame] | 443 | init_waitqueue_head(&kvm->arch.ipte_wq); |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 444 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 445 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
| 446 | VM_EVENT(kvm, 3, "%s", "vm created"); |
| 447 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 448 | if (type & KVM_VM_S390_UCONTROL) { |
| 449 | kvm->arch.gmap = NULL; |
| 450 | } else { |
| 451 | kvm->arch.gmap = gmap_alloc(current->mm); |
| 452 | if (!kvm->arch.gmap) |
| 453 | goto out_nogmap; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 454 | kvm->arch.gmap->private = kvm; |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 455 | kvm->arch.gmap->pfault_enabled = 0; |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 456 | } |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 457 | |
| 458 | kvm->arch.css_support = 0; |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 459 | kvm->arch.use_irqchip = 0; |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 460 | |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 461 | spin_lock_init(&kvm->arch.start_stop_lock); |
| 462 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 463 | return 0; |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 464 | out_nogmap: |
| 465 | debug_unregister(kvm->arch.dbf); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 466 | out_nodbf: |
| 467 | free_page((unsigned long)(kvm->arch.sca)); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 468 | out_err: |
| 469 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 470 | } |
| 471 | |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 472 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
| 473 | { |
| 474 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); |
Cornelia Huck | ade38c3 | 2012-07-23 17:20:30 +0200 | [diff] [blame] | 475 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
Christian Borntraeger | 67335e6 | 2014-03-25 17:09:08 +0100 | [diff] [blame] | 476 | kvm_s390_clear_local_irqs(vcpu); |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 477 | kvm_clear_async_pf_completion_queue(vcpu); |
Carsten Otte | 58f9460 | 2012-01-04 10:25:27 +0100 | [diff] [blame] | 478 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 479 | clear_bit(63 - vcpu->vcpu_id, |
| 480 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
| 481 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
| 482 | (__u64) vcpu->arch.sie_block) |
| 483 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; |
| 484 | } |
Carsten Otte | abf4a71 | 2009-05-12 17:21:51 +0200 | [diff] [blame] | 485 | smp_mb(); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 486 | |
| 487 | if (kvm_is_ucontrol(vcpu->kvm)) |
| 488 | gmap_free(vcpu->arch.gmap); |
| 489 | |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 490 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
| 491 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 492 | free_page((unsigned long)(vcpu->arch.sie_block)); |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 493 | |
Christian Borntraeger | 6692cef | 2008-11-26 14:51:08 +0100 | [diff] [blame] | 494 | kvm_vcpu_uninit(vcpu); |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 495 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | static void kvm_free_vcpus(struct kvm *kvm) |
| 499 | { |
| 500 | unsigned int i; |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 501 | struct kvm_vcpu *vcpu; |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 502 | |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 503 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 504 | kvm_arch_vcpu_destroy(vcpu); |
| 505 | |
| 506 | mutex_lock(&kvm->lock); |
| 507 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) |
| 508 | kvm->vcpus[i] = NULL; |
| 509 | |
| 510 | atomic_set(&kvm->online_vcpus, 0); |
| 511 | mutex_unlock(&kvm->lock); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 512 | } |
| 513 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 514 | void kvm_arch_sync_events(struct kvm *kvm) |
| 515 | { |
| 516 | } |
| 517 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 518 | void kvm_arch_destroy_vm(struct kvm *kvm) |
| 519 | { |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 520 | kvm_free_vcpus(kvm); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 521 | free_page((unsigned long)(kvm->arch.sca)); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 522 | debug_unregister(kvm->arch.dbf); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 523 | if (!kvm_is_ucontrol(kvm)) |
| 524 | gmap_free(kvm->arch.gmap); |
Cornelia Huck | 841b91c | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 525 | kvm_s390_destroy_adapters(kvm); |
Christian Borntraeger | 67335e6 | 2014-03-25 17:09:08 +0100 | [diff] [blame] | 526 | kvm_s390_clear_float_irqs(kvm); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 527 | } |
| 528 | |
| 529 | /* Section: vcpu related */ |
| 530 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| 531 | { |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 532 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
| 533 | kvm_clear_async_pf_completion_queue(vcpu); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 534 | if (kvm_is_ucontrol(vcpu->kvm)) { |
| 535 | vcpu->arch.gmap = gmap_alloc(current->mm); |
| 536 | if (!vcpu->arch.gmap) |
| 537 | return -ENOMEM; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 538 | vcpu->arch.gmap->private = vcpu->kvm; |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 539 | return 0; |
| 540 | } |
| 541 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 542 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 543 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
| 544 | KVM_SYNC_GPRS | |
Christian Borntraeger | 9eed0735 | 2012-02-06 10:59:07 +0100 | [diff] [blame] | 545 | KVM_SYNC_ACRS | |
| 546 | KVM_SYNC_CRS; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 551 | { |
Christian Borntraeger | 6692cef | 2008-11-26 14:51:08 +0100 | [diff] [blame] | 552 | /* Nothing todo */ |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 556 | { |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 557 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
| 558 | save_fp_regs(vcpu->arch.host_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 559 | save_access_regs(vcpu->arch.host_acrs); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 560 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 561 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 562 | restore_access_regs(vcpu->run->s.regs.acrs); |
Christian Borntraeger | 480e592 | 2011-09-20 17:07:28 +0200 | [diff] [blame] | 563 | gmap_enable(vcpu->arch.gmap); |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 564 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 565 | } |
| 566 | |
| 567 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 568 | { |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 569 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
Christian Borntraeger | 480e592 | 2011-09-20 17:07:28 +0200 | [diff] [blame] | 570 | gmap_disable(vcpu->arch.gmap); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 571 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 572 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 573 | save_access_regs(vcpu->run->s.regs.acrs); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 574 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
| 575 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 576 | restore_access_regs(vcpu->arch.host_acrs); |
| 577 | } |
| 578 | |
| 579 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) |
| 580 | { |
| 581 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ |
| 582 | vcpu->arch.sie_block->gpsw.mask = 0UL; |
| 583 | vcpu->arch.sie_block->gpsw.addr = 0UL; |
Christian Borntraeger | 8d26cf7 | 2012-01-11 11:19:32 +0100 | [diff] [blame] | 584 | kvm_s390_set_prefix(vcpu, 0); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 585 | vcpu->arch.sie_block->cputm = 0UL; |
| 586 | vcpu->arch.sie_block->ckc = 0UL; |
| 587 | vcpu->arch.sie_block->todpr = 0; |
| 588 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); |
| 589 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; |
| 590 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; |
| 591 | vcpu->arch.guest_fpregs.fpc = 0; |
| 592 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); |
| 593 | vcpu->arch.sie_block->gbea = 1; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 594 | vcpu->arch.sie_block->pp = 0; |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 595 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
| 596 | kvm_clear_async_pf_completion_queue(vcpu); |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 597 | kvm_s390_vcpu_stop(vcpu); |
Jens Freimann | 2ed10cc | 2014-02-11 13:48:07 +0100 | [diff] [blame] | 598 | kvm_s390_clear_local_irqs(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 599 | } |
| 600 | |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 601 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
| 602 | { |
| 603 | return 0; |
| 604 | } |
| 605 | |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 606 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
| 607 | { |
| 608 | free_page(vcpu->arch.sie_block->cbrlo); |
| 609 | vcpu->arch.sie_block->cbrlo = 0; |
| 610 | } |
| 611 | |
| 612 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) |
| 613 | { |
| 614 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); |
| 615 | if (!vcpu->arch.sie_block->cbrlo) |
| 616 | return -ENOMEM; |
| 617 | |
| 618 | vcpu->arch.sie_block->ecb2 |= 0x80; |
| 619 | vcpu->arch.sie_block->ecb2 &= ~0x08; |
| 620 | return 0; |
| 621 | } |
| 622 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 623 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| 624 | { |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 625 | int rc = 0; |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 626 | |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 627 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
| 628 | CPUSTAT_SM | |
Christian Borntraeger | 69d0d3a | 2013-06-12 13:54:53 +0200 | [diff] [blame] | 629 | CPUSTAT_STOPPED | |
| 630 | CPUSTAT_GED); |
Christian Borntraeger | fc34531 | 2010-06-17 23:16:20 +0200 | [diff] [blame] | 631 | vcpu->arch.sie_block->ecb = 6; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 632 | if (test_vfacility(50) && test_vfacility(73)) |
| 633 | vcpu->arch.sie_block->ecb |= 0x10; |
| 634 | |
Christian Borntraeger | 69d0d3a | 2013-06-12 13:54:53 +0200 | [diff] [blame] | 635 | vcpu->arch.sie_block->ecb2 = 8; |
Heiko Carstens | 217a440 | 2013-12-30 12:54:14 +0100 | [diff] [blame] | 636 | vcpu->arch.sie_block->eca = 0xC1002000U; |
| 637 | if (sclp_has_siif()) |
| 638 | vcpu->arch.sie_block->eca |= 1; |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 639 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
Dominik Dingel | 693ffc0 | 2014-01-14 18:11:14 +0100 | [diff] [blame] | 640 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 641 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
| 642 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
| 643 | if (rc) |
| 644 | return rc; |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 645 | } |
Christian Borntraeger | ca87230 | 2009-05-12 17:21:49 +0200 | [diff] [blame] | 646 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
| 647 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, |
| 648 | (unsigned long) vcpu); |
| 649 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
Christian Borntraeger | 453423d | 2008-03-25 18:47:29 +0100 | [diff] [blame] | 650 | get_cpu_id(&vcpu->arch.cpu_id); |
Christian Borntraeger | 92e6ecf | 2009-03-26 15:23:58 +0100 | [diff] [blame] | 651 | vcpu->arch.cpu_id.version = 0xff; |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 652 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 653 | } |
| 654 | |
| 655 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, |
| 656 | unsigned int id) |
| 657 | { |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 658 | struct kvm_vcpu *vcpu; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 659 | struct sie_page *sie_page; |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 660 | int rc = -EINVAL; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 661 | |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 662 | if (id >= KVM_MAX_VCPUS) |
| 663 | goto out; |
| 664 | |
| 665 | rc = -ENOMEM; |
| 666 | |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 667 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 668 | if (!vcpu) |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 669 | goto out; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 670 | |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 671 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
| 672 | if (!sie_page) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 673 | goto out_free_cpu; |
| 674 | |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 675 | vcpu->arch.sie_block = &sie_page->sie_block; |
| 676 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; |
| 677 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 678 | vcpu->arch.sie_block->icpua = id; |
Carsten Otte | 58f9460 | 2012-01-04 10:25:27 +0100 | [diff] [blame] | 679 | if (!kvm_is_ucontrol(kvm)) { |
| 680 | if (!kvm->arch.sca) { |
| 681 | WARN_ON_ONCE(1); |
| 682 | goto out_free_cpu; |
| 683 | } |
| 684 | if (!kvm->arch.sca->cpu[id].sda) |
| 685 | kvm->arch.sca->cpu[id].sda = |
| 686 | (__u64) vcpu->arch.sie_block; |
| 687 | vcpu->arch.sie_block->scaoh = |
| 688 | (__u32)(((__u64)kvm->arch.sca) >> 32); |
| 689 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; |
| 690 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
| 691 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 692 | |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 693 | spin_lock_init(&vcpu->arch.local_int.lock); |
| 694 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); |
| 695 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
Christian Borntraeger | d0321a2 | 2013-06-12 13:54:55 +0200 | [diff] [blame] | 696 | vcpu->arch.local_int.wq = &vcpu->wq; |
Christian Borntraeger | 5288fbf | 2008-03-25 18:47:31 +0100 | [diff] [blame] | 697 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 698 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 699 | rc = kvm_vcpu_init(vcpu, kvm, id); |
| 700 | if (rc) |
Wei Yongjun | 7b06bf2 | 2010-03-09 14:37:53 +0800 | [diff] [blame] | 701 | goto out_free_sie_block; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 702 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
| 703 | vcpu->arch.sie_block); |
Cornelia Huck | ade38c3 | 2012-07-23 17:20:30 +0200 | [diff] [blame] | 704 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 705 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 706 | return vcpu; |
Wei Yongjun | 7b06bf2 | 2010-03-09 14:37:53 +0800 | [diff] [blame] | 707 | out_free_sie_block: |
| 708 | free_page((unsigned long)(vcpu->arch.sie_block)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 709 | out_free_cpu: |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 710 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 711 | out: |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 712 | return ERR_PTR(rc); |
| 713 | } |
| 714 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 715 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
| 716 | { |
Michael Mueller | f87618e | 2014-02-26 16:14:17 +0100 | [diff] [blame] | 717 | return kvm_cpu_has_interrupt(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 718 | } |
| 719 | |
Christian Borntraeger | 49b99e1 | 2013-05-17 14:41:35 +0200 | [diff] [blame] | 720 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
| 721 | { |
| 722 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
| 723 | } |
| 724 | |
| 725 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
| 726 | { |
| 727 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
| 728 | } |
| 729 | |
| 730 | /* |
| 731 | * Kick a guest cpu out of SIE and wait until SIE is not running. |
| 732 | * If the CPU is not running (e.g. waiting as idle) the function will |
| 733 | * return immediately. */ |
| 734 | void exit_sie(struct kvm_vcpu *vcpu) |
| 735 | { |
| 736 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
| 737 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
| 738 | cpu_relax(); |
| 739 | } |
| 740 | |
| 741 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ |
| 742 | void exit_sie_sync(struct kvm_vcpu *vcpu) |
| 743 | { |
| 744 | s390_vcpu_block(vcpu); |
| 745 | exit_sie(vcpu); |
| 746 | } |
| 747 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 748 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
| 749 | { |
| 750 | int i; |
| 751 | struct kvm *kvm = gmap->private; |
| 752 | struct kvm_vcpu *vcpu; |
| 753 | |
| 754 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 755 | /* match against both prefix pages */ |
| 756 | if (vcpu->arch.sie_block->prefix == (address & ~0x1000UL)) { |
| 757 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
| 758 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); |
| 759 | exit_sie_sync(vcpu); |
| 760 | } |
| 761 | } |
| 762 | } |
| 763 | |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 764 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
| 765 | { |
| 766 | /* kvm common code refers to this, but never calls it */ |
| 767 | BUG(); |
| 768 | return 0; |
| 769 | } |
| 770 | |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 771 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
| 772 | struct kvm_one_reg *reg) |
| 773 | { |
| 774 | int r = -EINVAL; |
| 775 | |
| 776 | switch (reg->id) { |
Carsten Otte | 29b7c71 | 2012-05-15 14:15:27 +0200 | [diff] [blame] | 777 | case KVM_REG_S390_TODPR: |
| 778 | r = put_user(vcpu->arch.sie_block->todpr, |
| 779 | (u32 __user *)reg->addr); |
| 780 | break; |
| 781 | case KVM_REG_S390_EPOCHDIFF: |
| 782 | r = put_user(vcpu->arch.sie_block->epoch, |
| 783 | (u64 __user *)reg->addr); |
| 784 | break; |
Jason J. herne | 46a6dd1 | 2012-05-15 14:15:28 +0200 | [diff] [blame] | 785 | case KVM_REG_S390_CPU_TIMER: |
| 786 | r = put_user(vcpu->arch.sie_block->cputm, |
| 787 | (u64 __user *)reg->addr); |
| 788 | break; |
| 789 | case KVM_REG_S390_CLOCK_COMP: |
| 790 | r = put_user(vcpu->arch.sie_block->ckc, |
| 791 | (u64 __user *)reg->addr); |
| 792 | break; |
Dominik Dingel | 536336c | 2013-09-30 10:55:33 +0200 | [diff] [blame] | 793 | case KVM_REG_S390_PFTOKEN: |
| 794 | r = put_user(vcpu->arch.pfault_token, |
| 795 | (u64 __user *)reg->addr); |
| 796 | break; |
| 797 | case KVM_REG_S390_PFCOMPARE: |
| 798 | r = put_user(vcpu->arch.pfault_compare, |
| 799 | (u64 __user *)reg->addr); |
| 800 | break; |
| 801 | case KVM_REG_S390_PFSELECT: |
| 802 | r = put_user(vcpu->arch.pfault_select, |
| 803 | (u64 __user *)reg->addr); |
| 804 | break; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 805 | case KVM_REG_S390_PP: |
| 806 | r = put_user(vcpu->arch.sie_block->pp, |
| 807 | (u64 __user *)reg->addr); |
| 808 | break; |
Christian Borntraeger | afa45ff | 2014-02-10 15:39:23 +0100 | [diff] [blame] | 809 | case KVM_REG_S390_GBEA: |
| 810 | r = put_user(vcpu->arch.sie_block->gbea, |
| 811 | (u64 __user *)reg->addr); |
| 812 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 813 | default: |
| 814 | break; |
| 815 | } |
| 816 | |
| 817 | return r; |
| 818 | } |
| 819 | |
| 820 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, |
| 821 | struct kvm_one_reg *reg) |
| 822 | { |
| 823 | int r = -EINVAL; |
| 824 | |
| 825 | switch (reg->id) { |
Carsten Otte | 29b7c71 | 2012-05-15 14:15:27 +0200 | [diff] [blame] | 826 | case KVM_REG_S390_TODPR: |
| 827 | r = get_user(vcpu->arch.sie_block->todpr, |
| 828 | (u32 __user *)reg->addr); |
| 829 | break; |
| 830 | case KVM_REG_S390_EPOCHDIFF: |
| 831 | r = get_user(vcpu->arch.sie_block->epoch, |
| 832 | (u64 __user *)reg->addr); |
| 833 | break; |
Jason J. herne | 46a6dd1 | 2012-05-15 14:15:28 +0200 | [diff] [blame] | 834 | case KVM_REG_S390_CPU_TIMER: |
| 835 | r = get_user(vcpu->arch.sie_block->cputm, |
| 836 | (u64 __user *)reg->addr); |
| 837 | break; |
| 838 | case KVM_REG_S390_CLOCK_COMP: |
| 839 | r = get_user(vcpu->arch.sie_block->ckc, |
| 840 | (u64 __user *)reg->addr); |
| 841 | break; |
Dominik Dingel | 536336c | 2013-09-30 10:55:33 +0200 | [diff] [blame] | 842 | case KVM_REG_S390_PFTOKEN: |
| 843 | r = get_user(vcpu->arch.pfault_token, |
| 844 | (u64 __user *)reg->addr); |
| 845 | break; |
| 846 | case KVM_REG_S390_PFCOMPARE: |
| 847 | r = get_user(vcpu->arch.pfault_compare, |
| 848 | (u64 __user *)reg->addr); |
| 849 | break; |
| 850 | case KVM_REG_S390_PFSELECT: |
| 851 | r = get_user(vcpu->arch.pfault_select, |
| 852 | (u64 __user *)reg->addr); |
| 853 | break; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 854 | case KVM_REG_S390_PP: |
| 855 | r = get_user(vcpu->arch.sie_block->pp, |
| 856 | (u64 __user *)reg->addr); |
| 857 | break; |
Christian Borntraeger | afa45ff | 2014-02-10 15:39:23 +0100 | [diff] [blame] | 858 | case KVM_REG_S390_GBEA: |
| 859 | r = get_user(vcpu->arch.sie_block->gbea, |
| 860 | (u64 __user *)reg->addr); |
| 861 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 862 | default: |
| 863 | break; |
| 864 | } |
| 865 | |
| 866 | return r; |
| 867 | } |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 868 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 869 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
| 870 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 871 | kvm_s390_vcpu_initial_reset(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 872 | return 0; |
| 873 | } |
| 874 | |
| 875 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 876 | { |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 877 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 878 | return 0; |
| 879 | } |
| 880 | |
| 881 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 882 | { |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 883 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 884 | return 0; |
| 885 | } |
| 886 | |
| 887 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 888 | struct kvm_sregs *sregs) |
| 889 | { |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 890 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 891 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 892 | restore_access_regs(vcpu->run->s.regs.acrs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 893 | return 0; |
| 894 | } |
| 895 | |
| 896 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 897 | struct kvm_sregs *sregs) |
| 898 | { |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 899 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 900 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 901 | return 0; |
| 902 | } |
| 903 | |
| 904 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 905 | { |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 906 | if (test_fp_ctl(fpu->fpc)) |
| 907 | return -EINVAL; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 908 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 909 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
| 910 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 911 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 916 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 917 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
| 918 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 919 | return 0; |
| 920 | } |
| 921 | |
| 922 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) |
| 923 | { |
| 924 | int rc = 0; |
| 925 | |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 926 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 927 | rc = -EBUSY; |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 928 | else { |
| 929 | vcpu->run->psw_mask = psw.mask; |
| 930 | vcpu->run->psw_addr = psw.addr; |
| 931 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 932 | return rc; |
| 933 | } |
| 934 | |
| 935 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| 936 | struct kvm_translation *tr) |
| 937 | { |
| 938 | return -EINVAL; /* not implemented yet */ |
| 939 | } |
| 940 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 941 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
| 942 | KVM_GUESTDBG_USE_HW_BP | \ |
| 943 | KVM_GUESTDBG_ENABLE) |
| 944 | |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 945 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| 946 | struct kvm_guest_debug *dbg) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 947 | { |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 948 | int rc = 0; |
| 949 | |
| 950 | vcpu->guest_debug = 0; |
| 951 | kvm_s390_clear_bp_data(vcpu); |
| 952 | |
| 953 | if (vcpu->guest_debug & ~VALID_GUESTDBG_FLAGS) |
| 954 | return -EINVAL; |
| 955 | |
| 956 | if (dbg->control & KVM_GUESTDBG_ENABLE) { |
| 957 | vcpu->guest_debug = dbg->control; |
| 958 | /* enforce guest PER */ |
| 959 | atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
| 960 | |
| 961 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) |
| 962 | rc = kvm_s390_import_bp_data(vcpu, dbg); |
| 963 | } else { |
| 964 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
| 965 | vcpu->arch.guestdbg.last_bp = 0; |
| 966 | } |
| 967 | |
| 968 | if (rc) { |
| 969 | vcpu->guest_debug = 0; |
| 970 | kvm_s390_clear_bp_data(vcpu); |
| 971 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
| 972 | } |
| 973 | |
| 974 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 975 | } |
| 976 | |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 977 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| 978 | struct kvm_mp_state *mp_state) |
| 979 | { |
| 980 | return -EINVAL; /* not implemented yet */ |
| 981 | } |
| 982 | |
| 983 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| 984 | struct kvm_mp_state *mp_state) |
| 985 | { |
| 986 | return -EINVAL; /* not implemented yet */ |
| 987 | } |
| 988 | |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 989 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
| 990 | { |
| 991 | if (!MACHINE_IS_LPAR) |
| 992 | return false; |
| 993 | /* only enable for z10 and later */ |
| 994 | if (!MACHINE_HAS_EDAT1) |
| 995 | return false; |
| 996 | if (!kvm->arch.use_cmma) |
| 997 | return false; |
| 998 | return true; |
| 999 | } |
| 1000 | |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1001 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
| 1002 | { |
| 1003 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; |
| 1004 | } |
| 1005 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1006 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
| 1007 | { |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1008 | retry: |
| 1009 | s390_vcpu_unblock(vcpu); |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1010 | /* |
| 1011 | * We use MMU_RELOAD just to re-arm the ipte notifier for the |
| 1012 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. |
| 1013 | * This ensures that the ipte instruction for this request has |
| 1014 | * already finished. We might race against a second unmapper that |
| 1015 | * wants to set the blocking bit. Lets just retry the request loop. |
| 1016 | */ |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1017 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1018 | int rc; |
| 1019 | rc = gmap_ipte_notify(vcpu->arch.gmap, |
| 1020 | vcpu->arch.sie_block->prefix, |
| 1021 | PAGE_SIZE * 2); |
| 1022 | if (rc) |
| 1023 | return rc; |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1024 | goto retry; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1025 | } |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1026 | |
| 1027 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
| 1028 | if (!ibs_enabled(vcpu)) { |
| 1029 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); |
| 1030 | atomic_set_mask(CPUSTAT_IBS, |
| 1031 | &vcpu->arch.sie_block->cpuflags); |
| 1032 | } |
| 1033 | goto retry; |
| 1034 | } |
| 1035 | |
| 1036 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { |
| 1037 | if (ibs_enabled(vcpu)) { |
| 1038 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); |
| 1039 | atomic_clear_mask(CPUSTAT_IBS, |
| 1040 | &vcpu->arch.sie_block->cpuflags); |
| 1041 | } |
| 1042 | goto retry; |
| 1043 | } |
| 1044 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1045 | return 0; |
| 1046 | } |
| 1047 | |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1048 | /** |
| 1049 | * kvm_arch_fault_in_page - fault-in guest page if necessary |
| 1050 | * @vcpu: The corresponding virtual cpu |
| 1051 | * @gpa: Guest physical address |
| 1052 | * @writable: Whether the page should be writable or not |
| 1053 | * |
| 1054 | * Make sure that a guest page has been faulted-in on the host. |
| 1055 | * |
| 1056 | * Return: Zero on success, negative error code otherwise. |
| 1057 | */ |
| 1058 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1059 | { |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1060 | struct mm_struct *mm = current->mm; |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1061 | hva_t hva; |
| 1062 | long rc; |
| 1063 | |
| 1064 | hva = gmap_fault(gpa, vcpu->arch.gmap); |
| 1065 | if (IS_ERR_VALUE(hva)) |
| 1066 | return (long)hva; |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1067 | down_read(&mm->mmap_sem); |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1068 | rc = get_user_pages(current, mm, hva, 1, writable, 0, NULL, NULL); |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1069 | up_read(&mm->mmap_sem); |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1070 | |
| 1071 | return rc < 0 ? rc : 0; |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1072 | } |
| 1073 | |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 1074 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
| 1075 | unsigned long token) |
| 1076 | { |
| 1077 | struct kvm_s390_interrupt inti; |
| 1078 | inti.parm64 = token; |
| 1079 | |
| 1080 | if (start_token) { |
| 1081 | inti.type = KVM_S390_INT_PFAULT_INIT; |
| 1082 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &inti)); |
| 1083 | } else { |
| 1084 | inti.type = KVM_S390_INT_PFAULT_DONE; |
| 1085 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
| 1086 | } |
| 1087 | } |
| 1088 | |
| 1089 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
| 1090 | struct kvm_async_pf *work) |
| 1091 | { |
| 1092 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); |
| 1093 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); |
| 1094 | } |
| 1095 | |
| 1096 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, |
| 1097 | struct kvm_async_pf *work) |
| 1098 | { |
| 1099 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); |
| 1100 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); |
| 1101 | } |
| 1102 | |
| 1103 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, |
| 1104 | struct kvm_async_pf *work) |
| 1105 | { |
| 1106 | /* s390 will always inject the page directly */ |
| 1107 | } |
| 1108 | |
| 1109 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) |
| 1110 | { |
| 1111 | /* |
| 1112 | * s390 will always inject the page directly, |
| 1113 | * but we still want check_async_completion to cleanup |
| 1114 | */ |
| 1115 | return true; |
| 1116 | } |
| 1117 | |
| 1118 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) |
| 1119 | { |
| 1120 | hva_t hva; |
| 1121 | struct kvm_arch_async_pf arch; |
| 1122 | int rc; |
| 1123 | |
| 1124 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
| 1125 | return 0; |
| 1126 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != |
| 1127 | vcpu->arch.pfault_compare) |
| 1128 | return 0; |
| 1129 | if (psw_extint_disabled(vcpu)) |
| 1130 | return 0; |
| 1131 | if (kvm_cpu_has_interrupt(vcpu)) |
| 1132 | return 0; |
| 1133 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) |
| 1134 | return 0; |
| 1135 | if (!vcpu->arch.gmap->pfault_enabled) |
| 1136 | return 0; |
| 1137 | |
Heiko Carstens | 81480cc | 2014-01-01 16:36:07 +0100 | [diff] [blame] | 1138 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
| 1139 | hva += current->thread.gmap_addr & ~PAGE_MASK; |
| 1140 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 1141 | return 0; |
| 1142 | |
| 1143 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); |
| 1144 | return rc; |
| 1145 | } |
| 1146 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1147 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1148 | { |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1149 | int rc, cpuflags; |
Carsten Otte | e168bf8 | 2012-01-04 10:25:22 +0100 | [diff] [blame] | 1150 | |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 1151 | /* |
| 1152 | * On s390 notifications for arriving pages will be delivered directly |
| 1153 | * to the guest but the house keeping for completed pfaults is |
| 1154 | * handled outside the worker. |
| 1155 | */ |
| 1156 | kvm_check_async_pf_completion(vcpu); |
| 1157 | |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 1158 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1159 | |
| 1160 | if (need_resched()) |
| 1161 | schedule(); |
| 1162 | |
Christian Borntraeger | 71cde58 | 2008-05-21 13:37:34 +0200 | [diff] [blame] | 1163 | if (test_thread_flag(TIF_MCCK_PENDING)) |
| 1164 | s390_handle_mcck(); |
| 1165 | |
Carsten Otte | d6b6d16 | 2012-01-04 10:25:25 +0100 | [diff] [blame] | 1166 | if (!kvm_is_ucontrol(vcpu->kvm)) |
| 1167 | kvm_s390_deliver_pending_interrupts(vcpu); |
Carsten Otte | 0ff3186 | 2008-05-21 13:37:37 +0200 | [diff] [blame] | 1168 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1169 | rc = kvm_s390_handle_requests(vcpu); |
| 1170 | if (rc) |
| 1171 | return rc; |
| 1172 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1173 | if (guestdbg_enabled(vcpu)) { |
| 1174 | kvm_s390_backup_guest_per_regs(vcpu); |
| 1175 | kvm_s390_patch_guest_per_regs(vcpu); |
| 1176 | } |
| 1177 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1178 | vcpu->arch.sie_block->icptcode = 0; |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1179 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
| 1180 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); |
| 1181 | trace_kvm_s390_sie_enter(vcpu, cpuflags); |
Dominik Dingel | 2b29a9f | 2013-07-26 15:04:00 +0200 | [diff] [blame] | 1182 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1183 | return 0; |
| 1184 | } |
| 1185 | |
| 1186 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
| 1187 | { |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1188 | int rc = -1; |
Dominik Dingel | 2b29a9f | 2013-07-26 15:04:00 +0200 | [diff] [blame] | 1189 | |
| 1190 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
| 1191 | vcpu->arch.sie_block->icptcode); |
| 1192 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); |
| 1193 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1194 | if (guestdbg_enabled(vcpu)) |
| 1195 | kvm_s390_restore_guest_per_regs(vcpu); |
| 1196 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1197 | if (exit_reason >= 0) { |
Martin Schwidefsky | 7c47053 | 2013-05-17 14:41:37 +0200 | [diff] [blame] | 1198 | rc = 0; |
Thomas Huth | 210b1607 | 2013-09-19 16:26:18 +0200 | [diff] [blame] | 1199 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
| 1200 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; |
| 1201 | vcpu->run->s390_ucontrol.trans_exc_code = |
| 1202 | current->thread.gmap_addr; |
| 1203 | vcpu->run->s390_ucontrol.pgm_code = 0x10; |
| 1204 | rc = -EREMOTE; |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1205 | |
| 1206 | } else if (current->thread.gmap_pfault) { |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 1207 | trace_kvm_s390_major_guest_pfault(vcpu); |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1208 | current->thread.gmap_pfault = 0; |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1209 | if (kvm_arch_setup_async_pf(vcpu)) { |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1210 | rc = 0; |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1211 | } else { |
| 1212 | gpa_t gpa = current->thread.gmap_addr; |
| 1213 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); |
| 1214 | } |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | if (rc == -1) { |
Christian Borntraeger | 699bde3 | 2014-01-20 12:34:13 +0100 | [diff] [blame] | 1218 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
| 1219 | trace_kvm_s390_sie_fault(vcpu); |
| 1220 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
Carsten Otte | 1f0d0f0 | 2008-05-21 13:37:40 +0200 | [diff] [blame] | 1221 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1222 | |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 1223 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1224 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1225 | if (rc == 0) { |
| 1226 | if (kvm_is_ucontrol(vcpu->kvm)) |
Christian Borntraeger | 2955c83 | 2014-03-06 16:01:38 +0100 | [diff] [blame] | 1227 | /* Don't exit for host interrupts. */ |
| 1228 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1229 | else |
| 1230 | rc = kvm_handle_sie_intercept(vcpu); |
| 1231 | } |
| 1232 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1233 | return rc; |
| 1234 | } |
| 1235 | |
| 1236 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
| 1237 | { |
| 1238 | int rc, exit_reason; |
| 1239 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1240 | /* |
| 1241 | * We try to hold kvm->srcu during most of vcpu_run (except when run- |
| 1242 | * ning the guest), so that memslots (and other stuff) are protected |
| 1243 | */ |
| 1244 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| 1245 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1246 | do { |
| 1247 | rc = vcpu_pre_run(vcpu); |
| 1248 | if (rc) |
| 1249 | break; |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1250 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1251 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1252 | /* |
| 1253 | * As PF_VCPU will be used in fault handler, between |
| 1254 | * guest_enter and guest_exit should be no uaccess. |
| 1255 | */ |
| 1256 | preempt_disable(); |
| 1257 | kvm_guest_enter(); |
| 1258 | preempt_enable(); |
| 1259 | exit_reason = sie64a(vcpu->arch.sie_block, |
| 1260 | vcpu->run->s.regs.gprs); |
| 1261 | kvm_guest_exit(); |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1262 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1263 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1264 | rc = vcpu_post_run(vcpu, exit_reason); |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1265 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1266 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1267 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
Carsten Otte | e168bf8 | 2012-01-04 10:25:22 +0100 | [diff] [blame] | 1268 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1269 | } |
| 1270 | |
| 1271 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1272 | { |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1273 | int rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1274 | sigset_t sigsaved; |
| 1275 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1276 | if (guestdbg_exit_pending(vcpu)) { |
| 1277 | kvm_s390_prepare_debug_exit(vcpu); |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1281 | if (vcpu->sigset_active) |
| 1282 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
| 1283 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1284 | kvm_s390_vcpu_start(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1285 | |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1286 | switch (kvm_run->exit_reason) { |
| 1287 | case KVM_EXIT_S390_SIEIC: |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1288 | case KVM_EXIT_UNKNOWN: |
Christian Ehrhardt | 9ace903 | 2009-05-20 15:34:55 +0200 | [diff] [blame] | 1289 | case KVM_EXIT_INTR: |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1290 | case KVM_EXIT_S390_RESET: |
Carsten Otte | e168bf8 | 2012-01-04 10:25:22 +0100 | [diff] [blame] | 1291 | case KVM_EXIT_S390_UCONTROL: |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 1292 | case KVM_EXIT_S390_TSCH: |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1293 | case KVM_EXIT_DEBUG: |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1294 | break; |
| 1295 | default: |
| 1296 | BUG(); |
| 1297 | } |
| 1298 | |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1299 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
| 1300 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; |
Christian Borntraeger | 60b413c | 2012-01-11 11:20:31 +0100 | [diff] [blame] | 1301 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
| 1302 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; |
| 1303 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); |
| 1304 | } |
Christian Borntraeger | 9eed0735 | 2012-02-06 10:59:07 +0100 | [diff] [blame] | 1305 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
| 1306 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; |
| 1307 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); |
| 1308 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); |
| 1309 | } |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1310 | |
Heiko Carstens | dab4079d | 2009-06-12 10:26:32 +0200 | [diff] [blame] | 1311 | might_fault(); |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1312 | rc = __vcpu_run(vcpu); |
Christian Ehrhardt | 9ace903 | 2009-05-20 15:34:55 +0200 | [diff] [blame] | 1313 | |
Christian Ehrhardt | b1d16c4 | 2009-05-20 15:34:56 +0200 | [diff] [blame] | 1314 | if (signal_pending(current) && !rc) { |
| 1315 | kvm_run->exit_reason = KVM_EXIT_INTR; |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1316 | rc = -EINTR; |
Christian Ehrhardt | b1d16c4 | 2009-05-20 15:34:56 +0200 | [diff] [blame] | 1317 | } |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1318 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1319 | if (guestdbg_exit_pending(vcpu) && !rc) { |
| 1320 | kvm_s390_prepare_debug_exit(vcpu); |
| 1321 | rc = 0; |
| 1322 | } |
| 1323 | |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 1324 | if (rc == -EOPNOTSUPP) { |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1325 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
| 1326 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; |
| 1327 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1328 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
| 1329 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; |
| 1330 | rc = 0; |
| 1331 | } |
| 1332 | |
| 1333 | if (rc == -EREMOTE) { |
| 1334 | /* intercept was handled, but userspace support is needed |
| 1335 | * kvm_run has been prepared by the handler */ |
| 1336 | rc = 0; |
| 1337 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1338 | |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1339 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
| 1340 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; |
Christian Borntraeger | 60b413c | 2012-01-11 11:20:31 +0100 | [diff] [blame] | 1341 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
Christian Borntraeger | 9eed0735 | 2012-02-06 10:59:07 +0100 | [diff] [blame] | 1342 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1343 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1344 | if (vcpu->sigset_active) |
| 1345 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1346 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1347 | vcpu->stat.exit_userspace++; |
Heiko Carstens | 7e8e6ab | 2008-04-04 15:12:35 +0200 | [diff] [blame] | 1348 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1349 | } |
| 1350 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1351 | /* |
| 1352 | * store status at address |
| 1353 | * we use have two special cases: |
| 1354 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit |
| 1355 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix |
| 1356 | */ |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1357 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1358 | { |
Carsten Otte | 092670c | 2011-07-24 10:48:22 +0200 | [diff] [blame] | 1359 | unsigned char archmode = 1; |
Thomas Huth | 178bd78 | 2013-11-13 20:28:18 +0100 | [diff] [blame] | 1360 | u64 clkcomp; |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1361 | int rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1362 | |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1363 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
| 1364 | if (write_guest_abs(vcpu, 163, &archmode, 1)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1365 | return -EFAULT; |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1366 | gpa = SAVE_AREA_BASE; |
| 1367 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
| 1368 | if (write_guest_real(vcpu, 163, &archmode, 1)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1369 | return -EFAULT; |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1370 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
| 1371 | } |
| 1372 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), |
| 1373 | vcpu->arch.guest_fpregs.fprs, 128); |
| 1374 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), |
| 1375 | vcpu->run->s.regs.gprs, 128); |
| 1376 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), |
| 1377 | &vcpu->arch.sie_block->gpsw, 16); |
| 1378 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
| 1379 | &vcpu->arch.sie_block->prefix, 4); |
| 1380 | rc |= write_guest_abs(vcpu, |
| 1381 | gpa + offsetof(struct save_area, fp_ctrl_reg), |
| 1382 | &vcpu->arch.guest_fpregs.fpc, 4); |
| 1383 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), |
| 1384 | &vcpu->arch.sie_block->todpr, 4); |
| 1385 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), |
| 1386 | &vcpu->arch.sie_block->cputm, 8); |
Thomas Huth | 178bd78 | 2013-11-13 20:28:18 +0100 | [diff] [blame] | 1387 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1388 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
| 1389 | &clkcomp, 8); |
| 1390 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), |
| 1391 | &vcpu->run->s.regs.acrs, 64); |
| 1392 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), |
| 1393 | &vcpu->arch.sie_block->gcr, 128); |
| 1394 | return rc ? -EFAULT : 0; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1395 | } |
| 1396 | |
Thomas Huth | e879892 | 2013-11-06 15:46:33 +0100 | [diff] [blame] | 1397 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
| 1398 | { |
| 1399 | /* |
| 1400 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy |
| 1401 | * copying in vcpu load/put. Lets update our copies before we save |
| 1402 | * it into the save area |
| 1403 | */ |
| 1404 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 1405 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); |
| 1406 | save_access_regs(vcpu->run->s.regs.acrs); |
| 1407 | |
| 1408 | return kvm_s390_store_status_unloaded(vcpu, addr); |
| 1409 | } |
| 1410 | |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1411 | static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) |
| 1412 | { |
| 1413 | return atomic_read(&(vcpu)->arch.sie_block->cpuflags) & CPUSTAT_STOPPED; |
| 1414 | } |
| 1415 | |
| 1416 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
| 1417 | { |
| 1418 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); |
| 1419 | kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu); |
| 1420 | exit_sie_sync(vcpu); |
| 1421 | } |
| 1422 | |
| 1423 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) |
| 1424 | { |
| 1425 | unsigned int i; |
| 1426 | struct kvm_vcpu *vcpu; |
| 1427 | |
| 1428 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 1429 | __disable_ibs_on_vcpu(vcpu); |
| 1430 | } |
| 1431 | } |
| 1432 | |
| 1433 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
| 1434 | { |
| 1435 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); |
| 1436 | kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu); |
| 1437 | exit_sie_sync(vcpu); |
| 1438 | } |
| 1439 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1440 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
| 1441 | { |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1442 | int i, online_vcpus, started_vcpus = 0; |
| 1443 | |
| 1444 | if (!is_vcpu_stopped(vcpu)) |
| 1445 | return; |
| 1446 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1447 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1448 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
| 1449 | spin_lock_bh(&vcpu->kvm->arch.start_stop_lock); |
| 1450 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
| 1451 | |
| 1452 | for (i = 0; i < online_vcpus; i++) { |
| 1453 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) |
| 1454 | started_vcpus++; |
| 1455 | } |
| 1456 | |
| 1457 | if (started_vcpus == 0) { |
| 1458 | /* we're the only active VCPU -> speed it up */ |
| 1459 | __enable_ibs_on_vcpu(vcpu); |
| 1460 | } else if (started_vcpus == 1) { |
| 1461 | /* |
| 1462 | * As we are starting a second VCPU, we have to disable |
| 1463 | * the IBS facility on all VCPUs to remove potentially |
| 1464 | * oustanding ENABLE requests. |
| 1465 | */ |
| 1466 | __disable_ibs_on_all_vcpus(vcpu->kvm); |
| 1467 | } |
| 1468 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1469 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1470 | /* |
| 1471 | * Another VCPU might have used IBS while we were offline. |
| 1472 | * Let's play safe and flush the VCPU at startup. |
| 1473 | */ |
| 1474 | vcpu->arch.sie_block->ihcpu = 0xffff; |
| 1475 | spin_unlock_bh(&vcpu->kvm->arch.start_stop_lock); |
| 1476 | return; |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1477 | } |
| 1478 | |
| 1479 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) |
| 1480 | { |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1481 | int i, online_vcpus, started_vcpus = 0; |
| 1482 | struct kvm_vcpu *started_vcpu = NULL; |
| 1483 | |
| 1484 | if (is_vcpu_stopped(vcpu)) |
| 1485 | return; |
| 1486 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1487 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1488 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
| 1489 | spin_lock_bh(&vcpu->kvm->arch.start_stop_lock); |
| 1490 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
| 1491 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1492 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1493 | __disable_ibs_on_vcpu(vcpu); |
| 1494 | |
| 1495 | for (i = 0; i < online_vcpus; i++) { |
| 1496 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { |
| 1497 | started_vcpus++; |
| 1498 | started_vcpu = vcpu->kvm->vcpus[i]; |
| 1499 | } |
| 1500 | } |
| 1501 | |
| 1502 | if (started_vcpus == 1) { |
| 1503 | /* |
| 1504 | * As we only have one VCPU left, we want to enable the |
| 1505 | * IBS facility for that VCPU to speed it up. |
| 1506 | */ |
| 1507 | __enable_ibs_on_vcpu(started_vcpu); |
| 1508 | } |
| 1509 | |
| 1510 | spin_unlock_bh(&vcpu->kvm->arch.start_stop_lock); |
| 1511 | return; |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1512 | } |
| 1513 | |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1514 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
| 1515 | struct kvm_enable_cap *cap) |
| 1516 | { |
| 1517 | int r; |
| 1518 | |
| 1519 | if (cap->flags) |
| 1520 | return -EINVAL; |
| 1521 | |
| 1522 | switch (cap->cap) { |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 1523 | case KVM_CAP_S390_CSS_SUPPORT: |
| 1524 | if (!vcpu->kvm->arch.css_support) { |
| 1525 | vcpu->kvm->arch.css_support = 1; |
| 1526 | trace_kvm_s390_enable_css(vcpu->kvm); |
| 1527 | } |
| 1528 | r = 0; |
| 1529 | break; |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1530 | default: |
| 1531 | r = -EINVAL; |
| 1532 | break; |
| 1533 | } |
| 1534 | return r; |
| 1535 | } |
| 1536 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1537 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 1538 | unsigned int ioctl, unsigned long arg) |
| 1539 | { |
| 1540 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1541 | void __user *argp = (void __user *)arg; |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1542 | int idx; |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1543 | long r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1544 | |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1545 | switch (ioctl) { |
| 1546 | case KVM_S390_INTERRUPT: { |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1547 | struct kvm_s390_interrupt s390int; |
| 1548 | |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1549 | r = -EFAULT; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1550 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1551 | break; |
| 1552 | r = kvm_s390_inject_vcpu(vcpu, &s390int); |
| 1553 | break; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1554 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1555 | case KVM_S390_STORE_STATUS: |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1556 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1557 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1558 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1559 | break; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1560 | case KVM_S390_SET_INITIAL_PSW: { |
| 1561 | psw_t psw; |
| 1562 | |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1563 | r = -EFAULT; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1564 | if (copy_from_user(&psw, argp, sizeof(psw))) |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1565 | break; |
| 1566 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); |
| 1567 | break; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1568 | } |
| 1569 | case KVM_S390_INITIAL_RESET: |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1570 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
| 1571 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 1572 | case KVM_SET_ONE_REG: |
| 1573 | case KVM_GET_ONE_REG: { |
| 1574 | struct kvm_one_reg reg; |
| 1575 | r = -EFAULT; |
| 1576 | if (copy_from_user(®, argp, sizeof(reg))) |
| 1577 | break; |
| 1578 | if (ioctl == KVM_SET_ONE_REG) |
| 1579 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); |
| 1580 | else |
| 1581 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); |
| 1582 | break; |
| 1583 | } |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 1584 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 1585 | case KVM_S390_UCAS_MAP: { |
| 1586 | struct kvm_s390_ucas_mapping ucasmap; |
| 1587 | |
| 1588 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { |
| 1589 | r = -EFAULT; |
| 1590 | break; |
| 1591 | } |
| 1592 | |
| 1593 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 1594 | r = -EINVAL; |
| 1595 | break; |
| 1596 | } |
| 1597 | |
| 1598 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, |
| 1599 | ucasmap.vcpu_addr, ucasmap.length); |
| 1600 | break; |
| 1601 | } |
| 1602 | case KVM_S390_UCAS_UNMAP: { |
| 1603 | struct kvm_s390_ucas_mapping ucasmap; |
| 1604 | |
| 1605 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { |
| 1606 | r = -EFAULT; |
| 1607 | break; |
| 1608 | } |
| 1609 | |
| 1610 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 1611 | r = -EINVAL; |
| 1612 | break; |
| 1613 | } |
| 1614 | |
| 1615 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, |
| 1616 | ucasmap.length); |
| 1617 | break; |
| 1618 | } |
| 1619 | #endif |
Carsten Otte | ccc7910 | 2012-01-04 10:25:26 +0100 | [diff] [blame] | 1620 | case KVM_S390_VCPU_FAULT: { |
| 1621 | r = gmap_fault(arg, vcpu->arch.gmap); |
| 1622 | if (!IS_ERR_VALUE(r)) |
| 1623 | r = 0; |
| 1624 | break; |
| 1625 | } |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1626 | case KVM_ENABLE_CAP: |
| 1627 | { |
| 1628 | struct kvm_enable_cap cap; |
| 1629 | r = -EFAULT; |
| 1630 | if (copy_from_user(&cap, argp, sizeof(cap))) |
| 1631 | break; |
| 1632 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); |
| 1633 | break; |
| 1634 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1635 | default: |
Carsten Otte | 3e6afcf | 2012-01-04 10:25:30 +0100 | [diff] [blame] | 1636 | r = -ENOTTY; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1637 | } |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1638 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1639 | } |
| 1640 | |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 1641 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
| 1642 | { |
| 1643 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 1644 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) |
| 1645 | && (kvm_is_ucontrol(vcpu->kvm))) { |
| 1646 | vmf->page = virt_to_page(vcpu->arch.sie_block); |
| 1647 | get_page(vmf->page); |
| 1648 | return 0; |
| 1649 | } |
| 1650 | #endif |
| 1651 | return VM_FAULT_SIGBUS; |
| 1652 | } |
| 1653 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 1654 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 1655 | struct kvm_memory_slot *dont) |
| 1656 | { |
| 1657 | } |
| 1658 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 1659 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
| 1660 | unsigned long npages) |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 1661 | { |
| 1662 | return 0; |
| 1663 | } |
| 1664 | |
Takuya Yoshikawa | e59dbe0 | 2013-07-04 13:40:29 +0900 | [diff] [blame] | 1665 | void kvm_arch_memslots_updated(struct kvm *kvm) |
| 1666 | { |
| 1667 | } |
| 1668 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1669 | /* Section: memory related */ |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1670 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
| 1671 | struct kvm_memory_slot *memslot, |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 1672 | struct kvm_userspace_memory_region *mem, |
| 1673 | enum kvm_mr_change change) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1674 | { |
Nick Wang | dd2887e | 2013-03-25 17:22:57 +0100 | [diff] [blame] | 1675 | /* A few sanity checks. We can have memory slots which have to be |
| 1676 | located/ended at a segment boundary (1MB). The memory in userland is |
| 1677 | ok to be fragmented into various different vmas. It is okay to mmap() |
| 1678 | and munmap() stuff in this slot after doing this call at any time */ |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1679 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1680 | if (mem->userspace_addr & 0xffffful) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1681 | return -EINVAL; |
| 1682 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1683 | if (mem->memory_size & 0xffffful) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1684 | return -EINVAL; |
| 1685 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1686 | return 0; |
| 1687 | } |
| 1688 | |
| 1689 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
| 1690 | struct kvm_userspace_memory_region *mem, |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 1691 | const struct kvm_memory_slot *old, |
| 1692 | enum kvm_mr_change change) |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1693 | { |
Carsten Otte | f7850c9 | 2011-07-24 10:48:23 +0200 | [diff] [blame] | 1694 | int rc; |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1695 | |
Christian Borntraeger | 2cef4de | 2013-03-25 17:22:48 +0100 | [diff] [blame] | 1696 | /* If the basics of the memslot do not change, we do not want |
| 1697 | * to update the gmap. Every update causes several unnecessary |
| 1698 | * segment translation exceptions. This is usually handled just |
| 1699 | * fine by the normal fault handler + gmap, but it will also |
| 1700 | * cause faults on the prefix page of running guest CPUs. |
| 1701 | */ |
| 1702 | if (old->userspace_addr == mem->userspace_addr && |
| 1703 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && |
| 1704 | old->npages * PAGE_SIZE == mem->memory_size) |
| 1705 | return; |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1706 | |
| 1707 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, |
| 1708 | mem->guest_phys_addr, mem->memory_size); |
| 1709 | if (rc) |
Carsten Otte | f7850c9 | 2011-07-24 10:48:23 +0200 | [diff] [blame] | 1710 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1711 | return; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1712 | } |
| 1713 | |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 1714 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
| 1715 | { |
| 1716 | } |
| 1717 | |
| 1718 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
| 1719 | struct kvm_memory_slot *slot) |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 1720 | { |
| 1721 | } |
| 1722 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1723 | static int __init kvm_s390_init(void) |
| 1724 | { |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1725 | int ret; |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 1726 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1727 | if (ret) |
| 1728 | return ret; |
| 1729 | |
| 1730 | /* |
| 1731 | * guests can ask for up to 255+1 double words, we need a full page |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1732 | * to hold the maximum amount of facilities. On the other hand, we |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1733 | * only set facilities that are known to work in KVM. |
| 1734 | */ |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1735 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
| 1736 | if (!vfacilities) { |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1737 | kvm_exit(); |
| 1738 | return -ENOMEM; |
| 1739 | } |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1740 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
Thomas Huth | d208c79 | 2013-12-12 13:40:40 +0100 | [diff] [blame] | 1741 | vfacilities[0] &= 0xff82fff3f4fc2000UL; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 1742 | vfacilities[1] &= 0x005c000000000000UL; |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1743 | return 0; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1744 | } |
| 1745 | |
| 1746 | static void __exit kvm_s390_exit(void) |
| 1747 | { |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1748 | free_page((unsigned long) vfacilities); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1749 | kvm_exit(); |
| 1750 | } |
| 1751 | |
| 1752 | module_init(kvm_s390_init); |
| 1753 | module_exit(kvm_s390_exit); |
Cornelia Huck | 566af94 | 2013-05-27 18:42:33 +0200 | [diff] [blame] | 1754 | |
| 1755 | /* |
| 1756 | * Enable autoloading of the kvm module. |
| 1757 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c |
| 1758 | * since x86 takes a different approach. |
| 1759 | */ |
| 1760 | #include <linux/miscdevice.h> |
| 1761 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
| 1762 | MODULE_ALIAS("devname:kvm"); |