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) }, |
| 55 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
Christian Ehrhardt | 7697e71 | 2011-10-18 12:27:15 +0200 | [diff] [blame] | 56 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 57 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
| 58 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, |
| 59 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, |
| 60 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, |
| 61 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, |
| 62 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, |
| 63 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, |
Christian Borntraeger | 69d0d3a | 2013-06-12 13:54:53 +0200 | [diff] [blame] | 64 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
Christian Borntraeger | 453423d | 2008-03-25 18:47:29 +0100 | [diff] [blame] | 65 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
| 66 | { "instruction_spx", VCPU_STAT(instruction_spx) }, |
| 67 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, |
| 68 | { "instruction_stap", VCPU_STAT(instruction_stap) }, |
| 69 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, |
| 70 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
| 71 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 72 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
Christian Borntraeger | 453423d | 2008-03-25 18:47:29 +0100 | [diff] [blame] | 73 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
| 74 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, |
Christian Borntraeger | bb25b9b | 2011-07-24 10:48:17 +0200 | [diff] [blame] | 75 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
Christian Borntraeger | 5288fbf | 2008-03-25 18:47:31 +0100 | [diff] [blame] | 76 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
Cornelia Huck | bd59d3a | 2011-11-17 11:00:42 +0100 | [diff] [blame] | 77 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
Christian Ehrhardt | 7697e71 | 2011-10-18 12:27:15 +0200 | [diff] [blame] | 78 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
Christian Borntraeger | 5288fbf | 2008-03-25 18:47:31 +0100 | [diff] [blame] | 79 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
| 80 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
| 81 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
| 82 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, |
| 83 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, |
Christian Borntraeger | 388186b | 2011-10-30 15:17:03 +0100 | [diff] [blame] | 84 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
Christian Borntraeger | e28acfe | 2008-03-25 18:47:34 +0100 | [diff] [blame] | 85 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 86 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 87 | { NULL } |
| 88 | }; |
| 89 | |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 90 | unsigned long *vfacilities; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 91 | static struct gmap_notifier gmap_notifier; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 92 | |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 93 | /* test availability of vfacility */ |
| 94 | static inline int test_vfacility(unsigned long nr) |
| 95 | { |
| 96 | return __test_facility(nr, (void *) vfacilities); |
| 97 | } |
| 98 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 99 | /* Section: not file related */ |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 100 | int kvm_arch_hardware_enable(void *garbage) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 101 | { |
| 102 | /* every s390 is virtualization enabled ;-) */ |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 103 | return 0; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | void kvm_arch_hardware_disable(void *garbage) |
| 107 | { |
| 108 | } |
| 109 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 110 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
| 111 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 112 | int kvm_arch_hardware_setup(void) |
| 113 | { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 114 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
| 115 | gmap_register_ipte_notifier(&gmap_notifier); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | void kvm_arch_hardware_unsetup(void) |
| 120 | { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 121 | gmap_unregister_ipte_notifier(&gmap_notifier); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | void kvm_arch_check_processor_compat(void *rtn) |
| 125 | { |
| 126 | } |
| 127 | |
| 128 | int kvm_arch_init(void *opaque) |
| 129 | { |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | void kvm_arch_exit(void) |
| 134 | { |
| 135 | } |
| 136 | |
| 137 | /* Section: device related */ |
| 138 | long kvm_arch_dev_ioctl(struct file *filp, |
| 139 | unsigned int ioctl, unsigned long arg) |
| 140 | { |
| 141 | if (ioctl == KVM_S390_ENABLE_SIE) |
| 142 | return s390_enable_sie(); |
| 143 | return -EINVAL; |
| 144 | } |
| 145 | |
| 146 | int kvm_dev_ioctl_check_extension(long ext) |
| 147 | { |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 148 | int r; |
| 149 | |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 150 | switch (ext) { |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 151 | case KVM_CAP_S390_PSW: |
Christian Borntraeger | b6cf878 | 2011-09-20 17:07:29 +0200 | [diff] [blame] | 152 | case KVM_CAP_S390_GMAP: |
Christian Borntraeger | 52e16b1 | 2011-11-17 11:00:44 +0100 | [diff] [blame] | 153 | case KVM_CAP_SYNC_MMU: |
Carsten Otte | 1efd0f5 | 2012-01-04 10:25:29 +0100 | [diff] [blame] | 154 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 155 | case KVM_CAP_S390_UCONTROL: |
| 156 | #endif |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 157 | case KVM_CAP_ASYNC_PF: |
Christian Borntraeger | 60b413c | 2012-01-11 11:20:31 +0100 | [diff] [blame] | 158 | case KVM_CAP_SYNC_REGS: |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 159 | case KVM_CAP_ONE_REG: |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 160 | case KVM_CAP_ENABLE_CAP: |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 161 | case KVM_CAP_S390_CSS_SUPPORT: |
Cornelia Huck | 10ccaa1 | 2013-02-28 12:33:21 +0100 | [diff] [blame] | 162 | case KVM_CAP_IOEVENTFD: |
Jens Freimann | c05c418 | 2013-10-07 16:13:45 +0200 | [diff] [blame] | 163 | case KVM_CAP_DEVICE_CTRL: |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 164 | case KVM_CAP_ENABLE_CAP_VM: |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 165 | r = 1; |
| 166 | break; |
Christian Borntraeger | e726b1b | 2012-05-02 10:50:38 +0200 | [diff] [blame] | 167 | case KVM_CAP_NR_VCPUS: |
| 168 | case KVM_CAP_MAX_VCPUS: |
| 169 | r = KVM_MAX_VCPUS; |
| 170 | break; |
Nick Wang | e1e2e60 | 2013-03-25 17:22:58 +0100 | [diff] [blame] | 171 | case KVM_CAP_NR_MEMSLOTS: |
| 172 | r = KVM_USER_MEM_SLOTS; |
| 173 | break; |
Christian Borntraeger | 1526bf9 | 2012-05-15 14:15:25 +0200 | [diff] [blame] | 174 | case KVM_CAP_S390_COW: |
Martin Schwidefsky | abf09be | 2012-11-07 13:17:37 +0100 | [diff] [blame] | 175 | r = MACHINE_HAS_ESOP; |
Christian Borntraeger | 1526bf9 | 2012-05-15 14:15:25 +0200 | [diff] [blame] | 176 | break; |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 177 | default: |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 178 | r = 0; |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 179 | } |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 180 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 181 | } |
| 182 | |
Jason J. Herne | 15f36eb | 2012-08-02 10:10:17 -0400 | [diff] [blame^] | 183 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
| 184 | struct kvm_memory_slot *memslot) |
| 185 | { |
| 186 | gfn_t cur_gfn, last_gfn; |
| 187 | unsigned long address; |
| 188 | struct gmap *gmap = kvm->arch.gmap; |
| 189 | |
| 190 | down_read(&gmap->mm->mmap_sem); |
| 191 | /* Loop over all guest pages */ |
| 192 | last_gfn = memslot->base_gfn + memslot->npages; |
| 193 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { |
| 194 | address = gfn_to_hva_memslot(memslot, cur_gfn); |
| 195 | |
| 196 | if (gmap_test_and_clear_dirty(address, gmap)) |
| 197 | mark_page_dirty(kvm, cur_gfn); |
| 198 | } |
| 199 | up_read(&gmap->mm->mmap_sem); |
| 200 | } |
| 201 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 202 | /* Section: vm related */ |
| 203 | /* |
| 204 | * Get (and clear) the dirty memory log for a memory slot. |
| 205 | */ |
| 206 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| 207 | struct kvm_dirty_log *log) |
| 208 | { |
Jason J. Herne | 15f36eb | 2012-08-02 10:10:17 -0400 | [diff] [blame^] | 209 | int r; |
| 210 | unsigned long n; |
| 211 | struct kvm_memory_slot *memslot; |
| 212 | int is_dirty = 0; |
| 213 | |
| 214 | mutex_lock(&kvm->slots_lock); |
| 215 | |
| 216 | r = -EINVAL; |
| 217 | if (log->slot >= KVM_USER_MEM_SLOTS) |
| 218 | goto out; |
| 219 | |
| 220 | memslot = id_to_memslot(kvm->memslots, log->slot); |
| 221 | r = -ENOENT; |
| 222 | if (!memslot->dirty_bitmap) |
| 223 | goto out; |
| 224 | |
| 225 | kvm_s390_sync_dirty_log(kvm, memslot); |
| 226 | r = kvm_get_dirty_log(kvm, log, &is_dirty); |
| 227 | if (r) |
| 228 | goto out; |
| 229 | |
| 230 | /* Clear the dirty log */ |
| 231 | if (is_dirty) { |
| 232 | n = kvm_dirty_bitmap_bytes(memslot); |
| 233 | memset(memslot->dirty_bitmap, 0, n); |
| 234 | } |
| 235 | r = 0; |
| 236 | out: |
| 237 | mutex_unlock(&kvm->slots_lock); |
| 238 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 239 | } |
| 240 | |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 241 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
| 242 | { |
| 243 | int r; |
| 244 | |
| 245 | if (cap->flags) |
| 246 | return -EINVAL; |
| 247 | |
| 248 | switch (cap->cap) { |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 249 | case KVM_CAP_S390_IRQCHIP: |
| 250 | kvm->arch.use_irqchip = 1; |
| 251 | r = 0; |
| 252 | break; |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 253 | default: |
| 254 | r = -EINVAL; |
| 255 | break; |
| 256 | } |
| 257 | return r; |
| 258 | } |
| 259 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 260 | long kvm_arch_vm_ioctl(struct file *filp, |
| 261 | unsigned int ioctl, unsigned long arg) |
| 262 | { |
| 263 | struct kvm *kvm = filp->private_data; |
| 264 | void __user *argp = (void __user *)arg; |
| 265 | int r; |
| 266 | |
| 267 | switch (ioctl) { |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 268 | case KVM_S390_INTERRUPT: { |
| 269 | struct kvm_s390_interrupt s390int; |
| 270 | |
| 271 | r = -EFAULT; |
| 272 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
| 273 | break; |
| 274 | r = kvm_s390_inject_vm(kvm, &s390int); |
| 275 | break; |
| 276 | } |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 277 | case KVM_ENABLE_CAP: { |
| 278 | struct kvm_enable_cap cap; |
| 279 | r = -EFAULT; |
| 280 | if (copy_from_user(&cap, argp, sizeof(cap))) |
| 281 | break; |
| 282 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); |
| 283 | break; |
| 284 | } |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 285 | case KVM_CREATE_IRQCHIP: { |
| 286 | struct kvm_irq_routing_entry routing; |
| 287 | |
| 288 | r = -EINVAL; |
| 289 | if (kvm->arch.use_irqchip) { |
| 290 | /* Set up dummy routing. */ |
| 291 | memset(&routing, 0, sizeof(routing)); |
| 292 | kvm_set_irq_routing(kvm, &routing, 0, 0); |
| 293 | r = 0; |
| 294 | } |
| 295 | break; |
| 296 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 297 | default: |
Avi Kivity | 367e131 | 2009-08-26 14:57:07 +0300 | [diff] [blame] | 298 | r = -ENOTTY; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | return r; |
| 302 | } |
| 303 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 304 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 305 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 306 | int rc; |
| 307 | char debug_name[16]; |
Christian Borntraeger | f6c137f | 2014-03-19 11:18:29 +0100 | [diff] [blame] | 308 | static unsigned long sca_offset; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 309 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 310 | rc = -EINVAL; |
| 311 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 312 | if (type & ~KVM_VM_S390_UCONTROL) |
| 313 | goto out_err; |
| 314 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) |
| 315 | goto out_err; |
| 316 | #else |
| 317 | if (type) |
| 318 | goto out_err; |
| 319 | #endif |
| 320 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 321 | rc = s390_enable_sie(); |
| 322 | if (rc) |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 323 | goto out_err; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 324 | |
Carsten Otte | b290411 | 2011-10-18 12:27:13 +0200 | [diff] [blame] | 325 | rc = -ENOMEM; |
| 326 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 327 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
| 328 | if (!kvm->arch.sca) |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 329 | goto out_err; |
Christian Borntraeger | f6c137f | 2014-03-19 11:18:29 +0100 | [diff] [blame] | 330 | spin_lock(&kvm_lock); |
| 331 | sca_offset = (sca_offset + 16) & 0x7f0; |
| 332 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); |
| 333 | spin_unlock(&kvm_lock); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 334 | |
| 335 | sprintf(debug_name, "kvm-%u", current->pid); |
| 336 | |
| 337 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); |
| 338 | if (!kvm->arch.dbf) |
| 339 | goto out_nodbf; |
| 340 | |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 341 | spin_lock_init(&kvm->arch.float_int.lock); |
| 342 | INIT_LIST_HEAD(&kvm->arch.float_int.list); |
| 343 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 344 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
| 345 | VM_EVENT(kvm, 3, "%s", "vm created"); |
| 346 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 347 | if (type & KVM_VM_S390_UCONTROL) { |
| 348 | kvm->arch.gmap = NULL; |
| 349 | } else { |
| 350 | kvm->arch.gmap = gmap_alloc(current->mm); |
| 351 | if (!kvm->arch.gmap) |
| 352 | goto out_nogmap; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 353 | kvm->arch.gmap->private = kvm; |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 354 | kvm->arch.gmap->pfault_enabled = 0; |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 355 | } |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 356 | |
| 357 | kvm->arch.css_support = 0; |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 358 | kvm->arch.use_irqchip = 0; |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 359 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 360 | return 0; |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 361 | out_nogmap: |
| 362 | debug_unregister(kvm->arch.dbf); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 363 | out_nodbf: |
| 364 | free_page((unsigned long)(kvm->arch.sca)); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 365 | out_err: |
| 366 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 367 | } |
| 368 | |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 369 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
| 370 | { |
| 371 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); |
Cornelia Huck | ade38c3 | 2012-07-23 17:20:30 +0200 | [diff] [blame] | 372 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 373 | kvm_clear_async_pf_completion_queue(vcpu); |
Carsten Otte | 58f9460 | 2012-01-04 10:25:27 +0100 | [diff] [blame] | 374 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 375 | clear_bit(63 - vcpu->vcpu_id, |
| 376 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
| 377 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
| 378 | (__u64) vcpu->arch.sie_block) |
| 379 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; |
| 380 | } |
Carsten Otte | abf4a71 | 2009-05-12 17:21:51 +0200 | [diff] [blame] | 381 | smp_mb(); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 382 | |
| 383 | if (kvm_is_ucontrol(vcpu->kvm)) |
| 384 | gmap_free(vcpu->arch.gmap); |
| 385 | |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 386 | if (vcpu->arch.sie_block->cbrlo) |
| 387 | __free_page(__pfn_to_page( |
| 388 | vcpu->arch.sie_block->cbrlo >> PAGE_SHIFT)); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 389 | free_page((unsigned long)(vcpu->arch.sie_block)); |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 390 | |
Christian Borntraeger | 6692cef | 2008-11-26 14:51:08 +0100 | [diff] [blame] | 391 | kvm_vcpu_uninit(vcpu); |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 392 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | static void kvm_free_vcpus(struct kvm *kvm) |
| 396 | { |
| 397 | unsigned int i; |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 398 | struct kvm_vcpu *vcpu; |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 399 | |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 400 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 401 | kvm_arch_vcpu_destroy(vcpu); |
| 402 | |
| 403 | mutex_lock(&kvm->lock); |
| 404 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) |
| 405 | kvm->vcpus[i] = NULL; |
| 406 | |
| 407 | atomic_set(&kvm->online_vcpus, 0); |
| 408 | mutex_unlock(&kvm->lock); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 409 | } |
| 410 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 411 | void kvm_arch_sync_events(struct kvm *kvm) |
| 412 | { |
| 413 | } |
| 414 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 415 | void kvm_arch_destroy_vm(struct kvm *kvm) |
| 416 | { |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 417 | kvm_free_vcpus(kvm); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 418 | free_page((unsigned long)(kvm->arch.sca)); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 419 | debug_unregister(kvm->arch.dbf); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 420 | if (!kvm_is_ucontrol(kvm)) |
| 421 | gmap_free(kvm->arch.gmap); |
Cornelia Huck | 841b91c | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 422 | kvm_s390_destroy_adapters(kvm); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | /* Section: vcpu related */ |
| 426 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| 427 | { |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 428 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
| 429 | kvm_clear_async_pf_completion_queue(vcpu); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 430 | if (kvm_is_ucontrol(vcpu->kvm)) { |
| 431 | vcpu->arch.gmap = gmap_alloc(current->mm); |
| 432 | if (!vcpu->arch.gmap) |
| 433 | return -ENOMEM; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 434 | vcpu->arch.gmap->private = vcpu->kvm; |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 435 | return 0; |
| 436 | } |
| 437 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 438 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 439 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
| 440 | KVM_SYNC_GPRS | |
Christian Borntraeger | 9eed0735 | 2012-02-06 10:59:07 +0100 | [diff] [blame] | 441 | KVM_SYNC_ACRS | |
| 442 | KVM_SYNC_CRS; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 447 | { |
Christian Borntraeger | 6692cef | 2008-11-26 14:51:08 +0100 | [diff] [blame] | 448 | /* Nothing todo */ |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 452 | { |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 453 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
| 454 | save_fp_regs(vcpu->arch.host_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 455 | save_access_regs(vcpu->arch.host_acrs); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 456 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 457 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 458 | restore_access_regs(vcpu->run->s.regs.acrs); |
Christian Borntraeger | 480e592 | 2011-09-20 17:07:28 +0200 | [diff] [blame] | 459 | gmap_enable(vcpu->arch.gmap); |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 460 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 464 | { |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 465 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
Christian Borntraeger | 480e592 | 2011-09-20 17:07:28 +0200 | [diff] [blame] | 466 | gmap_disable(vcpu->arch.gmap); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 467 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 468 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 469 | save_access_regs(vcpu->run->s.regs.acrs); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 470 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
| 471 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 472 | restore_access_regs(vcpu->arch.host_acrs); |
| 473 | } |
| 474 | |
| 475 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) |
| 476 | { |
| 477 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ |
| 478 | vcpu->arch.sie_block->gpsw.mask = 0UL; |
| 479 | vcpu->arch.sie_block->gpsw.addr = 0UL; |
Christian Borntraeger | 8d26cf7 | 2012-01-11 11:19:32 +0100 | [diff] [blame] | 480 | kvm_s390_set_prefix(vcpu, 0); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 481 | vcpu->arch.sie_block->cputm = 0UL; |
| 482 | vcpu->arch.sie_block->ckc = 0UL; |
| 483 | vcpu->arch.sie_block->todpr = 0; |
| 484 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); |
| 485 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; |
| 486 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; |
| 487 | vcpu->arch.guest_fpregs.fpc = 0; |
| 488 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); |
| 489 | vcpu->arch.sie_block->gbea = 1; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 490 | vcpu->arch.sie_block->pp = 0; |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 491 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
| 492 | kvm_clear_async_pf_completion_queue(vcpu); |
Christian Borntraeger | 61bde82 | 2012-06-11 16:06:57 +0200 | [diff] [blame] | 493 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
Jens Freimann | 2ed10cc | 2014-02-11 13:48:07 +0100 | [diff] [blame] | 494 | kvm_s390_clear_local_irqs(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 495 | } |
| 496 | |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 497 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
| 498 | { |
| 499 | return 0; |
| 500 | } |
| 501 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 502 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| 503 | { |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 504 | struct page *cbrl; |
| 505 | |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 506 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
| 507 | CPUSTAT_SM | |
Christian Borntraeger | 69d0d3a | 2013-06-12 13:54:53 +0200 | [diff] [blame] | 508 | CPUSTAT_STOPPED | |
| 509 | CPUSTAT_GED); |
Christian Borntraeger | fc34531 | 2010-06-17 23:16:20 +0200 | [diff] [blame] | 510 | vcpu->arch.sie_block->ecb = 6; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 511 | if (test_vfacility(50) && test_vfacility(73)) |
| 512 | vcpu->arch.sie_block->ecb |= 0x10; |
| 513 | |
Christian Borntraeger | 69d0d3a | 2013-06-12 13:54:53 +0200 | [diff] [blame] | 514 | vcpu->arch.sie_block->ecb2 = 8; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 515 | vcpu->arch.sie_block->eca = 0xC1002001U; |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 516 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
Dominik Dingel | 693ffc0 | 2014-01-14 18:11:14 +0100 | [diff] [blame] | 517 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 518 | if (kvm_enabled_cmma()) { |
| 519 | cbrl = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 520 | if (cbrl) { |
| 521 | vcpu->arch.sie_block->ecb2 |= 0x80; |
| 522 | vcpu->arch.sie_block->ecb2 &= ~0x08; |
| 523 | vcpu->arch.sie_block->cbrlo = page_to_phys(cbrl); |
| 524 | } |
| 525 | } |
Christian Borntraeger | ca87230 | 2009-05-12 17:21:49 +0200 | [diff] [blame] | 526 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
| 527 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, |
| 528 | (unsigned long) vcpu); |
| 529 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
Christian Borntraeger | 453423d | 2008-03-25 18:47:29 +0100 | [diff] [blame] | 530 | get_cpu_id(&vcpu->arch.cpu_id); |
Christian Borntraeger | 92e6ecf | 2009-03-26 15:23:58 +0100 | [diff] [blame] | 531 | vcpu->arch.cpu_id.version = 0xff; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 532 | return 0; |
| 533 | } |
| 534 | |
| 535 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, |
| 536 | unsigned int id) |
| 537 | { |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 538 | struct kvm_vcpu *vcpu; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 539 | struct sie_page *sie_page; |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 540 | int rc = -EINVAL; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 541 | |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 542 | if (id >= KVM_MAX_VCPUS) |
| 543 | goto out; |
| 544 | |
| 545 | rc = -ENOMEM; |
| 546 | |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 547 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 548 | if (!vcpu) |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 549 | goto out; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 550 | |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 551 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
| 552 | if (!sie_page) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 553 | goto out_free_cpu; |
| 554 | |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 555 | vcpu->arch.sie_block = &sie_page->sie_block; |
| 556 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; |
| 557 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 558 | vcpu->arch.sie_block->icpua = id; |
Carsten Otte | 58f9460 | 2012-01-04 10:25:27 +0100 | [diff] [blame] | 559 | if (!kvm_is_ucontrol(kvm)) { |
| 560 | if (!kvm->arch.sca) { |
| 561 | WARN_ON_ONCE(1); |
| 562 | goto out_free_cpu; |
| 563 | } |
| 564 | if (!kvm->arch.sca->cpu[id].sda) |
| 565 | kvm->arch.sca->cpu[id].sda = |
| 566 | (__u64) vcpu->arch.sie_block; |
| 567 | vcpu->arch.sie_block->scaoh = |
| 568 | (__u32)(((__u64)kvm->arch.sca) >> 32); |
| 569 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; |
| 570 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
| 571 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 572 | |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 573 | spin_lock_init(&vcpu->arch.local_int.lock); |
| 574 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); |
| 575 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
Christian Borntraeger | d0321a2 | 2013-06-12 13:54:55 +0200 | [diff] [blame] | 576 | vcpu->arch.local_int.wq = &vcpu->wq; |
Christian Borntraeger | 5288fbf | 2008-03-25 18:47:31 +0100 | [diff] [blame] | 577 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 578 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 579 | rc = kvm_vcpu_init(vcpu, kvm, id); |
| 580 | if (rc) |
Wei Yongjun | 7b06bf2 | 2010-03-09 14:37:53 +0800 | [diff] [blame] | 581 | goto out_free_sie_block; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 582 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
| 583 | vcpu->arch.sie_block); |
Cornelia Huck | ade38c3 | 2012-07-23 17:20:30 +0200 | [diff] [blame] | 584 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 585 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 586 | return vcpu; |
Wei Yongjun | 7b06bf2 | 2010-03-09 14:37:53 +0800 | [diff] [blame] | 587 | out_free_sie_block: |
| 588 | free_page((unsigned long)(vcpu->arch.sie_block)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 589 | out_free_cpu: |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 590 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 591 | out: |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 592 | return ERR_PTR(rc); |
| 593 | } |
| 594 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 595 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
| 596 | { |
Michael Mueller | f87618e | 2014-02-26 16:14:17 +0100 | [diff] [blame] | 597 | return kvm_cpu_has_interrupt(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 598 | } |
| 599 | |
Christian Borntraeger | 49b99e1 | 2013-05-17 14:41:35 +0200 | [diff] [blame] | 600 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
| 601 | { |
| 602 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
| 603 | } |
| 604 | |
| 605 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
| 606 | { |
| 607 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
| 608 | } |
| 609 | |
| 610 | /* |
| 611 | * Kick a guest cpu out of SIE and wait until SIE is not running. |
| 612 | * If the CPU is not running (e.g. waiting as idle) the function will |
| 613 | * return immediately. */ |
| 614 | void exit_sie(struct kvm_vcpu *vcpu) |
| 615 | { |
| 616 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
| 617 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
| 618 | cpu_relax(); |
| 619 | } |
| 620 | |
| 621 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ |
| 622 | void exit_sie_sync(struct kvm_vcpu *vcpu) |
| 623 | { |
| 624 | s390_vcpu_block(vcpu); |
| 625 | exit_sie(vcpu); |
| 626 | } |
| 627 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 628 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
| 629 | { |
| 630 | int i; |
| 631 | struct kvm *kvm = gmap->private; |
| 632 | struct kvm_vcpu *vcpu; |
| 633 | |
| 634 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 635 | /* match against both prefix pages */ |
| 636 | if (vcpu->arch.sie_block->prefix == (address & ~0x1000UL)) { |
| 637 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
| 638 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); |
| 639 | exit_sie_sync(vcpu); |
| 640 | } |
| 641 | } |
| 642 | } |
| 643 | |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 644 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
| 645 | { |
| 646 | /* kvm common code refers to this, but never calls it */ |
| 647 | BUG(); |
| 648 | return 0; |
| 649 | } |
| 650 | |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 651 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
| 652 | struct kvm_one_reg *reg) |
| 653 | { |
| 654 | int r = -EINVAL; |
| 655 | |
| 656 | switch (reg->id) { |
Carsten Otte | 29b7c71 | 2012-05-15 14:15:27 +0200 | [diff] [blame] | 657 | case KVM_REG_S390_TODPR: |
| 658 | r = put_user(vcpu->arch.sie_block->todpr, |
| 659 | (u32 __user *)reg->addr); |
| 660 | break; |
| 661 | case KVM_REG_S390_EPOCHDIFF: |
| 662 | r = put_user(vcpu->arch.sie_block->epoch, |
| 663 | (u64 __user *)reg->addr); |
| 664 | break; |
Jason J. herne | 46a6dd1 | 2012-05-15 14:15:28 +0200 | [diff] [blame] | 665 | case KVM_REG_S390_CPU_TIMER: |
| 666 | r = put_user(vcpu->arch.sie_block->cputm, |
| 667 | (u64 __user *)reg->addr); |
| 668 | break; |
| 669 | case KVM_REG_S390_CLOCK_COMP: |
| 670 | r = put_user(vcpu->arch.sie_block->ckc, |
| 671 | (u64 __user *)reg->addr); |
| 672 | break; |
Dominik Dingel | 536336c | 2013-09-30 10:55:33 +0200 | [diff] [blame] | 673 | case KVM_REG_S390_PFTOKEN: |
| 674 | r = put_user(vcpu->arch.pfault_token, |
| 675 | (u64 __user *)reg->addr); |
| 676 | break; |
| 677 | case KVM_REG_S390_PFCOMPARE: |
| 678 | r = put_user(vcpu->arch.pfault_compare, |
| 679 | (u64 __user *)reg->addr); |
| 680 | break; |
| 681 | case KVM_REG_S390_PFSELECT: |
| 682 | r = put_user(vcpu->arch.pfault_select, |
| 683 | (u64 __user *)reg->addr); |
| 684 | break; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 685 | case KVM_REG_S390_PP: |
| 686 | r = put_user(vcpu->arch.sie_block->pp, |
| 687 | (u64 __user *)reg->addr); |
| 688 | break; |
Christian Borntraeger | afa45ff | 2014-02-10 15:39:23 +0100 | [diff] [blame] | 689 | case KVM_REG_S390_GBEA: |
| 690 | r = put_user(vcpu->arch.sie_block->gbea, |
| 691 | (u64 __user *)reg->addr); |
| 692 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 693 | default: |
| 694 | break; |
| 695 | } |
| 696 | |
| 697 | return r; |
| 698 | } |
| 699 | |
| 700 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, |
| 701 | struct kvm_one_reg *reg) |
| 702 | { |
| 703 | int r = -EINVAL; |
| 704 | |
| 705 | switch (reg->id) { |
Carsten Otte | 29b7c71 | 2012-05-15 14:15:27 +0200 | [diff] [blame] | 706 | case KVM_REG_S390_TODPR: |
| 707 | r = get_user(vcpu->arch.sie_block->todpr, |
| 708 | (u32 __user *)reg->addr); |
| 709 | break; |
| 710 | case KVM_REG_S390_EPOCHDIFF: |
| 711 | r = get_user(vcpu->arch.sie_block->epoch, |
| 712 | (u64 __user *)reg->addr); |
| 713 | break; |
Jason J. herne | 46a6dd1 | 2012-05-15 14:15:28 +0200 | [diff] [blame] | 714 | case KVM_REG_S390_CPU_TIMER: |
| 715 | r = get_user(vcpu->arch.sie_block->cputm, |
| 716 | (u64 __user *)reg->addr); |
| 717 | break; |
| 718 | case KVM_REG_S390_CLOCK_COMP: |
| 719 | r = get_user(vcpu->arch.sie_block->ckc, |
| 720 | (u64 __user *)reg->addr); |
| 721 | break; |
Dominik Dingel | 536336c | 2013-09-30 10:55:33 +0200 | [diff] [blame] | 722 | case KVM_REG_S390_PFTOKEN: |
| 723 | r = get_user(vcpu->arch.pfault_token, |
| 724 | (u64 __user *)reg->addr); |
| 725 | break; |
| 726 | case KVM_REG_S390_PFCOMPARE: |
| 727 | r = get_user(vcpu->arch.pfault_compare, |
| 728 | (u64 __user *)reg->addr); |
| 729 | break; |
| 730 | case KVM_REG_S390_PFSELECT: |
| 731 | r = get_user(vcpu->arch.pfault_select, |
| 732 | (u64 __user *)reg->addr); |
| 733 | break; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 734 | case KVM_REG_S390_PP: |
| 735 | r = get_user(vcpu->arch.sie_block->pp, |
| 736 | (u64 __user *)reg->addr); |
| 737 | break; |
Christian Borntraeger | afa45ff | 2014-02-10 15:39:23 +0100 | [diff] [blame] | 738 | case KVM_REG_S390_GBEA: |
| 739 | r = get_user(vcpu->arch.sie_block->gbea, |
| 740 | (u64 __user *)reg->addr); |
| 741 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 742 | default: |
| 743 | break; |
| 744 | } |
| 745 | |
| 746 | return r; |
| 747 | } |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 748 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 749 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
| 750 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 751 | kvm_s390_vcpu_initial_reset(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 752 | return 0; |
| 753 | } |
| 754 | |
| 755 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 756 | { |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 757 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 758 | return 0; |
| 759 | } |
| 760 | |
| 761 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 762 | { |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 763 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 764 | return 0; |
| 765 | } |
| 766 | |
| 767 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 768 | struct kvm_sregs *sregs) |
| 769 | { |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 770 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 771 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 772 | restore_access_regs(vcpu->run->s.regs.acrs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 773 | return 0; |
| 774 | } |
| 775 | |
| 776 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 777 | struct kvm_sregs *sregs) |
| 778 | { |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 779 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 780 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 781 | return 0; |
| 782 | } |
| 783 | |
| 784 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 785 | { |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 786 | if (test_fp_ctl(fpu->fpc)) |
| 787 | return -EINVAL; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 788 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 789 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
| 790 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 791 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 796 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 797 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
| 798 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 799 | return 0; |
| 800 | } |
| 801 | |
| 802 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) |
| 803 | { |
| 804 | int rc = 0; |
| 805 | |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 806 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 807 | rc = -EBUSY; |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 808 | else { |
| 809 | vcpu->run->psw_mask = psw.mask; |
| 810 | vcpu->run->psw_addr = psw.addr; |
| 811 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 812 | return rc; |
| 813 | } |
| 814 | |
| 815 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| 816 | struct kvm_translation *tr) |
| 817 | { |
| 818 | return -EINVAL; /* not implemented yet */ |
| 819 | } |
| 820 | |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 821 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| 822 | struct kvm_guest_debug *dbg) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 823 | { |
| 824 | return -EINVAL; /* not implemented yet */ |
| 825 | } |
| 826 | |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 827 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| 828 | struct kvm_mp_state *mp_state) |
| 829 | { |
| 830 | return -EINVAL; /* not implemented yet */ |
| 831 | } |
| 832 | |
| 833 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| 834 | struct kvm_mp_state *mp_state) |
| 835 | { |
| 836 | return -EINVAL; /* not implemented yet */ |
| 837 | } |
| 838 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 839 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
| 840 | { |
| 841 | /* |
| 842 | * We use MMU_RELOAD just to re-arm the ipte notifier for the |
| 843 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. |
| 844 | * This ensures that the ipte instruction for this request has |
| 845 | * already finished. We might race against a second unmapper that |
| 846 | * wants to set the blocking bit. Lets just retry the request loop. |
| 847 | */ |
| 848 | while (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
| 849 | int rc; |
| 850 | rc = gmap_ipte_notify(vcpu->arch.gmap, |
| 851 | vcpu->arch.sie_block->prefix, |
| 852 | PAGE_SIZE * 2); |
| 853 | if (rc) |
| 854 | return rc; |
| 855 | s390_vcpu_unblock(vcpu); |
| 856 | } |
| 857 | return 0; |
| 858 | } |
| 859 | |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 860 | static long kvm_arch_fault_in_sync(struct kvm_vcpu *vcpu) |
| 861 | { |
| 862 | long rc; |
| 863 | hva_t fault = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap); |
| 864 | struct mm_struct *mm = current->mm; |
| 865 | down_read(&mm->mmap_sem); |
| 866 | rc = get_user_pages(current, mm, fault, 1, 1, 0, NULL, NULL); |
| 867 | up_read(&mm->mmap_sem); |
| 868 | return rc; |
| 869 | } |
| 870 | |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 871 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
| 872 | unsigned long token) |
| 873 | { |
| 874 | struct kvm_s390_interrupt inti; |
| 875 | inti.parm64 = token; |
| 876 | |
| 877 | if (start_token) { |
| 878 | inti.type = KVM_S390_INT_PFAULT_INIT; |
| 879 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &inti)); |
| 880 | } else { |
| 881 | inti.type = KVM_S390_INT_PFAULT_DONE; |
| 882 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
| 883 | } |
| 884 | } |
| 885 | |
| 886 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
| 887 | struct kvm_async_pf *work) |
| 888 | { |
| 889 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); |
| 890 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); |
| 891 | } |
| 892 | |
| 893 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, |
| 894 | struct kvm_async_pf *work) |
| 895 | { |
| 896 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); |
| 897 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); |
| 898 | } |
| 899 | |
| 900 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, |
| 901 | struct kvm_async_pf *work) |
| 902 | { |
| 903 | /* s390 will always inject the page directly */ |
| 904 | } |
| 905 | |
| 906 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) |
| 907 | { |
| 908 | /* |
| 909 | * s390 will always inject the page directly, |
| 910 | * but we still want check_async_completion to cleanup |
| 911 | */ |
| 912 | return true; |
| 913 | } |
| 914 | |
| 915 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) |
| 916 | { |
| 917 | hva_t hva; |
| 918 | struct kvm_arch_async_pf arch; |
| 919 | int rc; |
| 920 | |
| 921 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
| 922 | return 0; |
| 923 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != |
| 924 | vcpu->arch.pfault_compare) |
| 925 | return 0; |
| 926 | if (psw_extint_disabled(vcpu)) |
| 927 | return 0; |
| 928 | if (kvm_cpu_has_interrupt(vcpu)) |
| 929 | return 0; |
| 930 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) |
| 931 | return 0; |
| 932 | if (!vcpu->arch.gmap->pfault_enabled) |
| 933 | return 0; |
| 934 | |
| 935 | hva = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap); |
| 936 | if (copy_from_guest(vcpu, &arch.pfault_token, vcpu->arch.pfault_token, 8)) |
| 937 | return 0; |
| 938 | |
| 939 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); |
| 940 | return rc; |
| 941 | } |
| 942 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 943 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 944 | { |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 945 | int rc, cpuflags; |
Carsten Otte | e168bf8 | 2012-01-04 10:25:22 +0100 | [diff] [blame] | 946 | |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 947 | /* |
| 948 | * On s390 notifications for arriving pages will be delivered directly |
| 949 | * to the guest but the house keeping for completed pfaults is |
| 950 | * handled outside the worker. |
| 951 | */ |
| 952 | kvm_check_async_pf_completion(vcpu); |
| 953 | |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 954 | 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] | 955 | |
| 956 | if (need_resched()) |
| 957 | schedule(); |
| 958 | |
Christian Borntraeger | 71cde58 | 2008-05-21 13:37:34 +0200 | [diff] [blame] | 959 | if (test_thread_flag(TIF_MCCK_PENDING)) |
| 960 | s390_handle_mcck(); |
| 961 | |
Carsten Otte | d6b6d16 | 2012-01-04 10:25:25 +0100 | [diff] [blame] | 962 | if (!kvm_is_ucontrol(vcpu->kvm)) |
| 963 | kvm_s390_deliver_pending_interrupts(vcpu); |
Carsten Otte | 0ff3186 | 2008-05-21 13:37:37 +0200 | [diff] [blame] | 964 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 965 | rc = kvm_s390_handle_requests(vcpu); |
| 966 | if (rc) |
| 967 | return rc; |
| 968 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 969 | vcpu->arch.sie_block->icptcode = 0; |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 970 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
| 971 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); |
| 972 | trace_kvm_s390_sie_enter(vcpu, cpuflags); |
Dominik Dingel | 2b29a9f | 2013-07-26 15:04:00 +0200 | [diff] [blame] | 973 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 974 | return 0; |
| 975 | } |
| 976 | |
| 977 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
| 978 | { |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 979 | int rc = -1; |
Dominik Dingel | 2b29a9f | 2013-07-26 15:04:00 +0200 | [diff] [blame] | 980 | |
| 981 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
| 982 | vcpu->arch.sie_block->icptcode); |
| 983 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); |
| 984 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 985 | if (exit_reason >= 0) { |
Martin Schwidefsky | 7c47053 | 2013-05-17 14:41:37 +0200 | [diff] [blame] | 986 | rc = 0; |
Thomas Huth | 210b1607 | 2013-09-19 16:26:18 +0200 | [diff] [blame] | 987 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
| 988 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; |
| 989 | vcpu->run->s390_ucontrol.trans_exc_code = |
| 990 | current->thread.gmap_addr; |
| 991 | vcpu->run->s390_ucontrol.pgm_code = 0x10; |
| 992 | rc = -EREMOTE; |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 993 | |
| 994 | } else if (current->thread.gmap_pfault) { |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 995 | trace_kvm_s390_major_guest_pfault(vcpu); |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 996 | current->thread.gmap_pfault = 0; |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 997 | if (kvm_arch_setup_async_pf(vcpu) || |
| 998 | (kvm_arch_fault_in_sync(vcpu) >= 0)) |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 999 | rc = 0; |
| 1000 | } |
| 1001 | |
| 1002 | if (rc == -1) { |
Christian Borntraeger | 699bde3 | 2014-01-20 12:34:13 +0100 | [diff] [blame] | 1003 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
| 1004 | trace_kvm_s390_sie_fault(vcpu); |
| 1005 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
Carsten Otte | 1f0d0f0 | 2008-05-21 13:37:40 +0200 | [diff] [blame] | 1006 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1007 | |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 1008 | 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] | 1009 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1010 | if (rc == 0) { |
| 1011 | if (kvm_is_ucontrol(vcpu->kvm)) |
Christian Borntraeger | 2955c83 | 2014-03-06 16:01:38 +0100 | [diff] [blame] | 1012 | /* Don't exit for host interrupts. */ |
| 1013 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1014 | else |
| 1015 | rc = kvm_handle_sie_intercept(vcpu); |
| 1016 | } |
| 1017 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1018 | return rc; |
| 1019 | } |
| 1020 | |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 1021 | bool kvm_enabled_cmma(void) |
| 1022 | { |
| 1023 | if (!MACHINE_IS_LPAR) |
| 1024 | return false; |
| 1025 | /* only enable for z10 and later */ |
| 1026 | if (!MACHINE_HAS_EDAT1) |
| 1027 | return false; |
| 1028 | return true; |
| 1029 | } |
| 1030 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1031 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
| 1032 | { |
| 1033 | int rc, exit_reason; |
| 1034 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1035 | /* |
| 1036 | * We try to hold kvm->srcu during most of vcpu_run (except when run- |
| 1037 | * ning the guest), so that memslots (and other stuff) are protected |
| 1038 | */ |
| 1039 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| 1040 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1041 | do { |
| 1042 | rc = vcpu_pre_run(vcpu); |
| 1043 | if (rc) |
| 1044 | break; |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1045 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1046 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1047 | /* |
| 1048 | * As PF_VCPU will be used in fault handler, between |
| 1049 | * guest_enter and guest_exit should be no uaccess. |
| 1050 | */ |
| 1051 | preempt_disable(); |
| 1052 | kvm_guest_enter(); |
| 1053 | preempt_enable(); |
| 1054 | exit_reason = sie64a(vcpu->arch.sie_block, |
| 1055 | vcpu->run->s.regs.gprs); |
| 1056 | kvm_guest_exit(); |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1057 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1058 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1059 | rc = vcpu_post_run(vcpu, exit_reason); |
| 1060 | } while (!signal_pending(current) && !rc); |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1061 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1062 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
Carsten Otte | e168bf8 | 2012-01-04 10:25:22 +0100 | [diff] [blame] | 1063 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1064 | } |
| 1065 | |
| 1066 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1067 | { |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1068 | int rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1069 | sigset_t sigsaved; |
| 1070 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1071 | if (vcpu->sigset_active) |
| 1072 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
| 1073 | |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 1074 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1075 | |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1076 | switch (kvm_run->exit_reason) { |
| 1077 | case KVM_EXIT_S390_SIEIC: |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1078 | case KVM_EXIT_UNKNOWN: |
Christian Ehrhardt | 9ace903 | 2009-05-20 15:34:55 +0200 | [diff] [blame] | 1079 | case KVM_EXIT_INTR: |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1080 | case KVM_EXIT_S390_RESET: |
Carsten Otte | e168bf8 | 2012-01-04 10:25:22 +0100 | [diff] [blame] | 1081 | case KVM_EXIT_S390_UCONTROL: |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 1082 | case KVM_EXIT_S390_TSCH: |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1083 | break; |
| 1084 | default: |
| 1085 | BUG(); |
| 1086 | } |
| 1087 | |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1088 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
| 1089 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; |
Christian Borntraeger | 60b413c | 2012-01-11 11:20:31 +0100 | [diff] [blame] | 1090 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
| 1091 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; |
| 1092 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); |
| 1093 | } |
Christian Borntraeger | 9eed0735 | 2012-02-06 10:59:07 +0100 | [diff] [blame] | 1094 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
| 1095 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; |
| 1096 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); |
| 1097 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); |
| 1098 | } |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1099 | |
Heiko Carstens | dab4079d | 2009-06-12 10:26:32 +0200 | [diff] [blame] | 1100 | might_fault(); |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1101 | rc = __vcpu_run(vcpu); |
Christian Ehrhardt | 9ace903 | 2009-05-20 15:34:55 +0200 | [diff] [blame] | 1102 | |
Christian Ehrhardt | b1d16c4 | 2009-05-20 15:34:56 +0200 | [diff] [blame] | 1103 | if (signal_pending(current) && !rc) { |
| 1104 | kvm_run->exit_reason = KVM_EXIT_INTR; |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1105 | rc = -EINTR; |
Christian Ehrhardt | b1d16c4 | 2009-05-20 15:34:56 +0200 | [diff] [blame] | 1106 | } |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1107 | |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 1108 | if (rc == -EOPNOTSUPP) { |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1109 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
| 1110 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; |
| 1111 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1112 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
| 1113 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; |
| 1114 | rc = 0; |
| 1115 | } |
| 1116 | |
| 1117 | if (rc == -EREMOTE) { |
| 1118 | /* intercept was handled, but userspace support is needed |
| 1119 | * kvm_run has been prepared by the handler */ |
| 1120 | rc = 0; |
| 1121 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1122 | |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1123 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
| 1124 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; |
Christian Borntraeger | 60b413c | 2012-01-11 11:20:31 +0100 | [diff] [blame] | 1125 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
Christian Borntraeger | 9eed0735 | 2012-02-06 10:59:07 +0100 | [diff] [blame] | 1126 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1127 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1128 | if (vcpu->sigset_active) |
| 1129 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1130 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1131 | vcpu->stat.exit_userspace++; |
Heiko Carstens | 7e8e6ab | 2008-04-04 15:12:35 +0200 | [diff] [blame] | 1132 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1133 | } |
| 1134 | |
Carsten Otte | 092670c | 2011-07-24 10:48:22 +0200 | [diff] [blame] | 1135 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1136 | unsigned long n, int prefix) |
| 1137 | { |
| 1138 | if (prefix) |
| 1139 | return copy_to_guest(vcpu, guestdest, from, n); |
| 1140 | else |
| 1141 | return copy_to_guest_absolute(vcpu, guestdest, from, n); |
| 1142 | } |
| 1143 | |
| 1144 | /* |
| 1145 | * store status at address |
| 1146 | * we use have two special cases: |
| 1147 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit |
| 1148 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix |
| 1149 | */ |
Thomas Huth | e879892 | 2013-11-06 15:46:33 +0100 | [diff] [blame] | 1150 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1151 | { |
Carsten Otte | 092670c | 2011-07-24 10:48:22 +0200 | [diff] [blame] | 1152 | unsigned char archmode = 1; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1153 | int prefix; |
Thomas Huth | 178bd78 | 2013-11-13 20:28:18 +0100 | [diff] [blame] | 1154 | u64 clkcomp; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1155 | |
| 1156 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { |
| 1157 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) |
| 1158 | return -EFAULT; |
| 1159 | addr = SAVE_AREA_BASE; |
| 1160 | prefix = 0; |
| 1161 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { |
| 1162 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) |
| 1163 | return -EFAULT; |
| 1164 | addr = SAVE_AREA_BASE; |
| 1165 | prefix = 1; |
| 1166 | } else |
| 1167 | prefix = 0; |
| 1168 | |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1169 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1170 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
| 1171 | return -EFAULT; |
| 1172 | |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1173 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 1174 | vcpu->run->s.regs.gprs, 128, prefix)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1175 | return -EFAULT; |
| 1176 | |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1177 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1178 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
| 1179 | return -EFAULT; |
| 1180 | |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1181 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1182 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
| 1183 | return -EFAULT; |
| 1184 | |
| 1185 | if (__guestcopy(vcpu, |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1186 | addr + offsetof(struct save_area, fp_ctrl_reg), |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1187 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
| 1188 | return -EFAULT; |
| 1189 | |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1190 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1191 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
| 1192 | return -EFAULT; |
| 1193 | |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1194 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1195 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
| 1196 | return -EFAULT; |
| 1197 | |
Thomas Huth | 178bd78 | 2013-11-13 20:28:18 +0100 | [diff] [blame] | 1198 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1199 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
Thomas Huth | 178bd78 | 2013-11-13 20:28:18 +0100 | [diff] [blame] | 1200 | &clkcomp, 8, prefix)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1201 | return -EFAULT; |
| 1202 | |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1203 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 1204 | &vcpu->run->s.regs.acrs, 64, prefix)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1205 | return -EFAULT; |
| 1206 | |
| 1207 | if (__guestcopy(vcpu, |
Heiko Carstens | f64ca21 | 2010-02-26 22:37:32 +0100 | [diff] [blame] | 1208 | addr + offsetof(struct save_area, ctrl_regs), |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1209 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
| 1210 | return -EFAULT; |
| 1211 | return 0; |
| 1212 | } |
| 1213 | |
Thomas Huth | e879892 | 2013-11-06 15:46:33 +0100 | [diff] [blame] | 1214 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
| 1215 | { |
| 1216 | /* |
| 1217 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy |
| 1218 | * copying in vcpu load/put. Lets update our copies before we save |
| 1219 | * it into the save area |
| 1220 | */ |
| 1221 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 1222 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); |
| 1223 | save_access_regs(vcpu->run->s.regs.acrs); |
| 1224 | |
| 1225 | return kvm_s390_store_status_unloaded(vcpu, addr); |
| 1226 | } |
| 1227 | |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1228 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
| 1229 | struct kvm_enable_cap *cap) |
| 1230 | { |
| 1231 | int r; |
| 1232 | |
| 1233 | if (cap->flags) |
| 1234 | return -EINVAL; |
| 1235 | |
| 1236 | switch (cap->cap) { |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 1237 | case KVM_CAP_S390_CSS_SUPPORT: |
| 1238 | if (!vcpu->kvm->arch.css_support) { |
| 1239 | vcpu->kvm->arch.css_support = 1; |
| 1240 | trace_kvm_s390_enable_css(vcpu->kvm); |
| 1241 | } |
| 1242 | r = 0; |
| 1243 | break; |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1244 | default: |
| 1245 | r = -EINVAL; |
| 1246 | break; |
| 1247 | } |
| 1248 | return r; |
| 1249 | } |
| 1250 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1251 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 1252 | unsigned int ioctl, unsigned long arg) |
| 1253 | { |
| 1254 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1255 | void __user *argp = (void __user *)arg; |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1256 | int idx; |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1257 | long r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1258 | |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1259 | switch (ioctl) { |
| 1260 | case KVM_S390_INTERRUPT: { |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1261 | struct kvm_s390_interrupt s390int; |
| 1262 | |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1263 | r = -EFAULT; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1264 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1265 | break; |
| 1266 | r = kvm_s390_inject_vcpu(vcpu, &s390int); |
| 1267 | break; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1268 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1269 | case KVM_S390_STORE_STATUS: |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1270 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1271 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1272 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1273 | break; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1274 | case KVM_S390_SET_INITIAL_PSW: { |
| 1275 | psw_t psw; |
| 1276 | |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1277 | r = -EFAULT; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1278 | if (copy_from_user(&psw, argp, sizeof(psw))) |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1279 | break; |
| 1280 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); |
| 1281 | break; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1282 | } |
| 1283 | case KVM_S390_INITIAL_RESET: |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1284 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
| 1285 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 1286 | case KVM_SET_ONE_REG: |
| 1287 | case KVM_GET_ONE_REG: { |
| 1288 | struct kvm_one_reg reg; |
| 1289 | r = -EFAULT; |
| 1290 | if (copy_from_user(®, argp, sizeof(reg))) |
| 1291 | break; |
| 1292 | if (ioctl == KVM_SET_ONE_REG) |
| 1293 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); |
| 1294 | else |
| 1295 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); |
| 1296 | break; |
| 1297 | } |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 1298 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 1299 | case KVM_S390_UCAS_MAP: { |
| 1300 | struct kvm_s390_ucas_mapping ucasmap; |
| 1301 | |
| 1302 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { |
| 1303 | r = -EFAULT; |
| 1304 | break; |
| 1305 | } |
| 1306 | |
| 1307 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 1308 | r = -EINVAL; |
| 1309 | break; |
| 1310 | } |
| 1311 | |
| 1312 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, |
| 1313 | ucasmap.vcpu_addr, ucasmap.length); |
| 1314 | break; |
| 1315 | } |
| 1316 | case KVM_S390_UCAS_UNMAP: { |
| 1317 | struct kvm_s390_ucas_mapping ucasmap; |
| 1318 | |
| 1319 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { |
| 1320 | r = -EFAULT; |
| 1321 | break; |
| 1322 | } |
| 1323 | |
| 1324 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 1325 | r = -EINVAL; |
| 1326 | break; |
| 1327 | } |
| 1328 | |
| 1329 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, |
| 1330 | ucasmap.length); |
| 1331 | break; |
| 1332 | } |
| 1333 | #endif |
Carsten Otte | ccc7910 | 2012-01-04 10:25:26 +0100 | [diff] [blame] | 1334 | case KVM_S390_VCPU_FAULT: { |
| 1335 | r = gmap_fault(arg, vcpu->arch.gmap); |
| 1336 | if (!IS_ERR_VALUE(r)) |
| 1337 | r = 0; |
| 1338 | break; |
| 1339 | } |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1340 | case KVM_ENABLE_CAP: |
| 1341 | { |
| 1342 | struct kvm_enable_cap cap; |
| 1343 | r = -EFAULT; |
| 1344 | if (copy_from_user(&cap, argp, sizeof(cap))) |
| 1345 | break; |
| 1346 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); |
| 1347 | break; |
| 1348 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1349 | default: |
Carsten Otte | 3e6afcf | 2012-01-04 10:25:30 +0100 | [diff] [blame] | 1350 | r = -ENOTTY; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1351 | } |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1352 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1353 | } |
| 1354 | |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 1355 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
| 1356 | { |
| 1357 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 1358 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) |
| 1359 | && (kvm_is_ucontrol(vcpu->kvm))) { |
| 1360 | vmf->page = virt_to_page(vcpu->arch.sie_block); |
| 1361 | get_page(vmf->page); |
| 1362 | return 0; |
| 1363 | } |
| 1364 | #endif |
| 1365 | return VM_FAULT_SIGBUS; |
| 1366 | } |
| 1367 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 1368 | 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] | 1369 | struct kvm_memory_slot *dont) |
| 1370 | { |
| 1371 | } |
| 1372 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 1373 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
| 1374 | unsigned long npages) |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 1375 | { |
| 1376 | return 0; |
| 1377 | } |
| 1378 | |
Takuya Yoshikawa | e59dbe0 | 2013-07-04 13:40:29 +0900 | [diff] [blame] | 1379 | void kvm_arch_memslots_updated(struct kvm *kvm) |
| 1380 | { |
| 1381 | } |
| 1382 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1383 | /* Section: memory related */ |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1384 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
| 1385 | struct kvm_memory_slot *memslot, |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 1386 | struct kvm_userspace_memory_region *mem, |
| 1387 | enum kvm_mr_change change) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1388 | { |
Nick Wang | dd2887e | 2013-03-25 17:22:57 +0100 | [diff] [blame] | 1389 | /* A few sanity checks. We can have memory slots which have to be |
| 1390 | located/ended at a segment boundary (1MB). The memory in userland is |
| 1391 | ok to be fragmented into various different vmas. It is okay to mmap() |
| 1392 | 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] | 1393 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1394 | if (mem->userspace_addr & 0xffffful) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1395 | return -EINVAL; |
| 1396 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1397 | if (mem->memory_size & 0xffffful) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1398 | return -EINVAL; |
| 1399 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1400 | return 0; |
| 1401 | } |
| 1402 | |
| 1403 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
| 1404 | struct kvm_userspace_memory_region *mem, |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 1405 | const struct kvm_memory_slot *old, |
| 1406 | enum kvm_mr_change change) |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1407 | { |
Carsten Otte | f7850c9 | 2011-07-24 10:48:23 +0200 | [diff] [blame] | 1408 | int rc; |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1409 | |
Christian Borntraeger | 2cef4de | 2013-03-25 17:22:48 +0100 | [diff] [blame] | 1410 | /* If the basics of the memslot do not change, we do not want |
| 1411 | * to update the gmap. Every update causes several unnecessary |
| 1412 | * segment translation exceptions. This is usually handled just |
| 1413 | * fine by the normal fault handler + gmap, but it will also |
| 1414 | * cause faults on the prefix page of running guest CPUs. |
| 1415 | */ |
| 1416 | if (old->userspace_addr == mem->userspace_addr && |
| 1417 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && |
| 1418 | old->npages * PAGE_SIZE == mem->memory_size) |
| 1419 | return; |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1420 | |
| 1421 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, |
| 1422 | mem->guest_phys_addr, mem->memory_size); |
| 1423 | if (rc) |
Carsten Otte | f7850c9 | 2011-07-24 10:48:23 +0200 | [diff] [blame] | 1424 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1425 | return; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1426 | } |
| 1427 | |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 1428 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
| 1429 | { |
| 1430 | } |
| 1431 | |
| 1432 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
| 1433 | struct kvm_memory_slot *slot) |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 1434 | { |
| 1435 | } |
| 1436 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1437 | static int __init kvm_s390_init(void) |
| 1438 | { |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1439 | int ret; |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 1440 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1441 | if (ret) |
| 1442 | return ret; |
| 1443 | |
| 1444 | /* |
| 1445 | * 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] | 1446 | * to hold the maximum amount of facilities. On the other hand, we |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1447 | * only set facilities that are known to work in KVM. |
| 1448 | */ |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1449 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
| 1450 | if (!vfacilities) { |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1451 | kvm_exit(); |
| 1452 | return -ENOMEM; |
| 1453 | } |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1454 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
Thomas Huth | d208c79 | 2013-12-12 13:40:40 +0100 | [diff] [blame] | 1455 | vfacilities[0] &= 0xff82fff3f4fc2000UL; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 1456 | vfacilities[1] &= 0x005c000000000000UL; |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1457 | return 0; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1458 | } |
| 1459 | |
| 1460 | static void __exit kvm_s390_exit(void) |
| 1461 | { |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1462 | free_page((unsigned long) vfacilities); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1463 | kvm_exit(); |
| 1464 | } |
| 1465 | |
| 1466 | module_init(kvm_s390_init); |
| 1467 | module_exit(kvm_s390_exit); |
Cornelia Huck | 566af94 | 2013-05-27 18:42:33 +0200 | [diff] [blame] | 1468 | |
| 1469 | /* |
| 1470 | * Enable autoloading of the kvm module. |
| 1471 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c |
| 1472 | * since x86 takes a different approach. |
| 1473 | */ |
| 1474 | #include <linux/miscdevice.h> |
| 1475 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
| 1476 | MODULE_ALIAS("devname:kvm"); |