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 */ |
Radim Krčmář | 13a34e0 | 2014-08-28 15:13:03 +0200 | [diff] [blame] | 103 | int kvm_arch_hardware_enable(void) |
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 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 109 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
| 110 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 111 | int kvm_arch_hardware_setup(void) |
| 112 | { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 113 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
| 114 | gmap_register_ipte_notifier(&gmap_notifier); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | void kvm_arch_hardware_unsetup(void) |
| 119 | { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 120 | gmap_unregister_ipte_notifier(&gmap_notifier); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 121 | } |
| 122 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 123 | int kvm_arch_init(void *opaque) |
| 124 | { |
Cornelia Huck | 84877d9 | 2014-09-02 10:27:35 +0100 | [diff] [blame] | 125 | /* Register floating interrupt controller interface. */ |
| 126 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 127 | } |
| 128 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 129 | /* Section: device related */ |
| 130 | long kvm_arch_dev_ioctl(struct file *filp, |
| 131 | unsigned int ioctl, unsigned long arg) |
| 132 | { |
| 133 | if (ioctl == KVM_S390_ENABLE_SIE) |
| 134 | return s390_enable_sie(); |
| 135 | return -EINVAL; |
| 136 | } |
| 137 | |
Alexander Graf | 784aa3d | 2014-07-14 18:27:35 +0200 | [diff] [blame] | 138 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 139 | { |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 140 | int r; |
| 141 | |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 142 | switch (ext) { |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 143 | case KVM_CAP_S390_PSW: |
Christian Borntraeger | b6cf878 | 2011-09-20 17:07:29 +0200 | [diff] [blame] | 144 | case KVM_CAP_S390_GMAP: |
Christian Borntraeger | 52e16b1 | 2011-11-17 11:00:44 +0100 | [diff] [blame] | 145 | case KVM_CAP_SYNC_MMU: |
Carsten Otte | 1efd0f5 | 2012-01-04 10:25:29 +0100 | [diff] [blame] | 146 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 147 | case KVM_CAP_S390_UCONTROL: |
| 148 | #endif |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 149 | case KVM_CAP_ASYNC_PF: |
Christian Borntraeger | 60b413c | 2012-01-11 11:20:31 +0100 | [diff] [blame] | 150 | case KVM_CAP_SYNC_REGS: |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 151 | case KVM_CAP_ONE_REG: |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 152 | case KVM_CAP_ENABLE_CAP: |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 153 | case KVM_CAP_S390_CSS_SUPPORT: |
Cornelia Huck | ebc3226 | 2014-05-09 15:00:46 +0200 | [diff] [blame] | 154 | case KVM_CAP_IRQFD: |
Cornelia Huck | 10ccaa1 | 2013-02-28 12:33:21 +0100 | [diff] [blame] | 155 | case KVM_CAP_IOEVENTFD: |
Jens Freimann | c05c418 | 2013-10-07 16:13:45 +0200 | [diff] [blame] | 156 | case KVM_CAP_DEVICE_CTRL: |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 157 | case KVM_CAP_ENABLE_CAP_VM: |
Cornelia Huck | 78599d9 | 2014-07-15 09:54:39 +0200 | [diff] [blame] | 158 | case KVM_CAP_S390_IRQCHIP: |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 159 | case KVM_CAP_VM_ATTRIBUTES: |
David Hildenbrand | 6352e4d | 2014-04-10 17:35:00 +0200 | [diff] [blame] | 160 | case KVM_CAP_MP_STATE: |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 161 | r = 1; |
| 162 | break; |
Christian Borntraeger | e726b1b | 2012-05-02 10:50:38 +0200 | [diff] [blame] | 163 | case KVM_CAP_NR_VCPUS: |
| 164 | case KVM_CAP_MAX_VCPUS: |
| 165 | r = KVM_MAX_VCPUS; |
| 166 | break; |
Nick Wang | e1e2e60 | 2013-03-25 17:22:58 +0100 | [diff] [blame] | 167 | case KVM_CAP_NR_MEMSLOTS: |
| 168 | r = KVM_USER_MEM_SLOTS; |
| 169 | break; |
Christian Borntraeger | 1526bf9 | 2012-05-15 14:15:25 +0200 | [diff] [blame] | 170 | case KVM_CAP_S390_COW: |
Martin Schwidefsky | abf09be | 2012-11-07 13:17:37 +0100 | [diff] [blame] | 171 | r = MACHINE_HAS_ESOP; |
Christian Borntraeger | 1526bf9 | 2012-05-15 14:15:25 +0200 | [diff] [blame] | 172 | break; |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 173 | default: |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 174 | r = 0; |
Carsten Otte | 2bd0ac4 | 2008-07-25 15:49:13 +0200 | [diff] [blame] | 175 | } |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 176 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 177 | } |
| 178 | |
Jason J. Herne | 15f36eb | 2012-08-02 10:10:17 -0400 | [diff] [blame] | 179 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
| 180 | struct kvm_memory_slot *memslot) |
| 181 | { |
| 182 | gfn_t cur_gfn, last_gfn; |
| 183 | unsigned long address; |
| 184 | struct gmap *gmap = kvm->arch.gmap; |
| 185 | |
| 186 | down_read(&gmap->mm->mmap_sem); |
| 187 | /* Loop over all guest pages */ |
| 188 | last_gfn = memslot->base_gfn + memslot->npages; |
| 189 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { |
| 190 | address = gfn_to_hva_memslot(memslot, cur_gfn); |
| 191 | |
| 192 | if (gmap_test_and_clear_dirty(address, gmap)) |
| 193 | mark_page_dirty(kvm, cur_gfn); |
| 194 | } |
| 195 | up_read(&gmap->mm->mmap_sem); |
| 196 | } |
| 197 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 198 | /* Section: vm related */ |
| 199 | /* |
| 200 | * Get (and clear) the dirty memory log for a memory slot. |
| 201 | */ |
| 202 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| 203 | struct kvm_dirty_log *log) |
| 204 | { |
Jason J. Herne | 15f36eb | 2012-08-02 10:10:17 -0400 | [diff] [blame] | 205 | int r; |
| 206 | unsigned long n; |
| 207 | struct kvm_memory_slot *memslot; |
| 208 | int is_dirty = 0; |
| 209 | |
| 210 | mutex_lock(&kvm->slots_lock); |
| 211 | |
| 212 | r = -EINVAL; |
| 213 | if (log->slot >= KVM_USER_MEM_SLOTS) |
| 214 | goto out; |
| 215 | |
| 216 | memslot = id_to_memslot(kvm->memslots, log->slot); |
| 217 | r = -ENOENT; |
| 218 | if (!memslot->dirty_bitmap) |
| 219 | goto out; |
| 220 | |
| 221 | kvm_s390_sync_dirty_log(kvm, memslot); |
| 222 | r = kvm_get_dirty_log(kvm, log, &is_dirty); |
| 223 | if (r) |
| 224 | goto out; |
| 225 | |
| 226 | /* Clear the dirty log */ |
| 227 | if (is_dirty) { |
| 228 | n = kvm_dirty_bitmap_bytes(memslot); |
| 229 | memset(memslot->dirty_bitmap, 0, n); |
| 230 | } |
| 231 | r = 0; |
| 232 | out: |
| 233 | mutex_unlock(&kvm->slots_lock); |
| 234 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 235 | } |
| 236 | |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 237 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
| 238 | { |
| 239 | int r; |
| 240 | |
| 241 | if (cap->flags) |
| 242 | return -EINVAL; |
| 243 | |
| 244 | switch (cap->cap) { |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 245 | case KVM_CAP_S390_IRQCHIP: |
| 246 | kvm->arch.use_irqchip = 1; |
| 247 | r = 0; |
| 248 | break; |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 249 | default: |
| 250 | r = -EINVAL; |
| 251 | break; |
| 252 | } |
| 253 | return r; |
| 254 | } |
| 255 | |
Dominik Dingel | 4f718ea | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 256 | static int kvm_s390_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
| 257 | { |
| 258 | int ret; |
| 259 | unsigned int idx; |
| 260 | switch (attr->attr) { |
| 261 | case KVM_S390_VM_MEM_ENABLE_CMMA: |
| 262 | ret = -EBUSY; |
| 263 | mutex_lock(&kvm->lock); |
| 264 | if (atomic_read(&kvm->online_vcpus) == 0) { |
| 265 | kvm->arch.use_cmma = 1; |
| 266 | ret = 0; |
| 267 | } |
| 268 | mutex_unlock(&kvm->lock); |
| 269 | break; |
| 270 | case KVM_S390_VM_MEM_CLR_CMMA: |
| 271 | mutex_lock(&kvm->lock); |
| 272 | idx = srcu_read_lock(&kvm->srcu); |
| 273 | page_table_reset_pgste(kvm->arch.gmap->mm, 0, TASK_SIZE, false); |
| 274 | srcu_read_unlock(&kvm->srcu, idx); |
| 275 | mutex_unlock(&kvm->lock); |
| 276 | ret = 0; |
| 277 | break; |
| 278 | default: |
| 279 | ret = -ENXIO; |
| 280 | break; |
| 281 | } |
| 282 | return ret; |
| 283 | } |
| 284 | |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 285 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| 286 | { |
| 287 | int ret; |
| 288 | |
| 289 | switch (attr->group) { |
Dominik Dingel | 4f718ea | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 290 | case KVM_S390_VM_MEM_CTRL: |
| 291 | ret = kvm_s390_mem_control(kvm, attr); |
| 292 | break; |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 293 | default: |
| 294 | ret = -ENXIO; |
| 295 | break; |
| 296 | } |
| 297 | |
| 298 | return ret; |
| 299 | } |
| 300 | |
| 301 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| 302 | { |
| 303 | return -ENXIO; |
| 304 | } |
| 305 | |
| 306 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| 307 | { |
| 308 | int ret; |
| 309 | |
| 310 | switch (attr->group) { |
Dominik Dingel | 4f718ea | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 311 | case KVM_S390_VM_MEM_CTRL: |
| 312 | switch (attr->attr) { |
| 313 | case KVM_S390_VM_MEM_ENABLE_CMMA: |
| 314 | case KVM_S390_VM_MEM_CLR_CMMA: |
| 315 | ret = 0; |
| 316 | break; |
| 317 | default: |
| 318 | ret = -ENXIO; |
| 319 | break; |
| 320 | } |
| 321 | break; |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 322 | default: |
| 323 | ret = -ENXIO; |
| 324 | break; |
| 325 | } |
| 326 | |
| 327 | return ret; |
| 328 | } |
| 329 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 330 | long kvm_arch_vm_ioctl(struct file *filp, |
| 331 | unsigned int ioctl, unsigned long arg) |
| 332 | { |
| 333 | struct kvm *kvm = filp->private_data; |
| 334 | void __user *argp = (void __user *)arg; |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 335 | struct kvm_device_attr attr; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 336 | int r; |
| 337 | |
| 338 | switch (ioctl) { |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 339 | case KVM_S390_INTERRUPT: { |
| 340 | struct kvm_s390_interrupt s390int; |
| 341 | |
| 342 | r = -EFAULT; |
| 343 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
| 344 | break; |
| 345 | r = kvm_s390_inject_vm(kvm, &s390int); |
| 346 | break; |
| 347 | } |
Cornelia Huck | d938dc5 | 2013-10-23 18:26:34 +0200 | [diff] [blame] | 348 | case KVM_ENABLE_CAP: { |
| 349 | struct kvm_enable_cap cap; |
| 350 | r = -EFAULT; |
| 351 | if (copy_from_user(&cap, argp, sizeof(cap))) |
| 352 | break; |
| 353 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); |
| 354 | break; |
| 355 | } |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 356 | case KVM_CREATE_IRQCHIP: { |
| 357 | struct kvm_irq_routing_entry routing; |
| 358 | |
| 359 | r = -EINVAL; |
| 360 | if (kvm->arch.use_irqchip) { |
| 361 | /* Set up dummy routing. */ |
| 362 | memset(&routing, 0, sizeof(routing)); |
| 363 | kvm_set_irq_routing(kvm, &routing, 0, 0); |
| 364 | r = 0; |
| 365 | } |
| 366 | break; |
| 367 | } |
Dominik Dingel | f206165 | 2014-04-09 13:13:00 +0200 | [diff] [blame] | 368 | case KVM_SET_DEVICE_ATTR: { |
| 369 | r = -EFAULT; |
| 370 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| 371 | break; |
| 372 | r = kvm_s390_vm_set_attr(kvm, &attr); |
| 373 | break; |
| 374 | } |
| 375 | case KVM_GET_DEVICE_ATTR: { |
| 376 | r = -EFAULT; |
| 377 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| 378 | break; |
| 379 | r = kvm_s390_vm_get_attr(kvm, &attr); |
| 380 | break; |
| 381 | } |
| 382 | case KVM_HAS_DEVICE_ATTR: { |
| 383 | r = -EFAULT; |
| 384 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| 385 | break; |
| 386 | r = kvm_s390_vm_has_attr(kvm, &attr); |
| 387 | break; |
| 388 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 389 | default: |
Avi Kivity | 367e131 | 2009-08-26 14:57:07 +0300 | [diff] [blame] | 390 | r = -ENOTTY; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | return r; |
| 394 | } |
| 395 | |
Tony Krowiak | 5102ee8 | 2014-06-27 14:46:01 -0400 | [diff] [blame] | 396 | static int kvm_s390_crypto_init(struct kvm *kvm) |
| 397 | { |
| 398 | if (!test_vfacility(76)) |
| 399 | return 0; |
| 400 | |
| 401 | kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), |
| 402 | GFP_KERNEL | GFP_DMA); |
| 403 | if (!kvm->arch.crypto.crycb) |
| 404 | return -ENOMEM; |
| 405 | |
| 406 | kvm->arch.crypto.crycbd = (__u32) (unsigned long) kvm->arch.crypto.crycb | |
| 407 | CRYCB_FORMAT1; |
| 408 | |
| 409 | return 0; |
| 410 | } |
| 411 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 412 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 413 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 414 | int rc; |
| 415 | char debug_name[16]; |
Christian Borntraeger | f6c137f | 2014-03-19 11:18:29 +0100 | [diff] [blame] | 416 | static unsigned long sca_offset; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 417 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 418 | rc = -EINVAL; |
| 419 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 420 | if (type & ~KVM_VM_S390_UCONTROL) |
| 421 | goto out_err; |
| 422 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) |
| 423 | goto out_err; |
| 424 | #else |
| 425 | if (type) |
| 426 | goto out_err; |
| 427 | #endif |
| 428 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 429 | rc = s390_enable_sie(); |
| 430 | if (rc) |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 431 | goto out_err; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 432 | |
Carsten Otte | b290411 | 2011-10-18 12:27:13 +0200 | [diff] [blame] | 433 | rc = -ENOMEM; |
| 434 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 435 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
| 436 | if (!kvm->arch.sca) |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 437 | goto out_err; |
Christian Borntraeger | f6c137f | 2014-03-19 11:18:29 +0100 | [diff] [blame] | 438 | spin_lock(&kvm_lock); |
| 439 | sca_offset = (sca_offset + 16) & 0x7f0; |
| 440 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); |
| 441 | spin_unlock(&kvm_lock); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 442 | |
| 443 | sprintf(debug_name, "kvm-%u", current->pid); |
| 444 | |
| 445 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); |
| 446 | if (!kvm->arch.dbf) |
| 447 | goto out_nodbf; |
| 448 | |
Tony Krowiak | 5102ee8 | 2014-06-27 14:46:01 -0400 | [diff] [blame] | 449 | if (kvm_s390_crypto_init(kvm) < 0) |
| 450 | goto out_crypto; |
| 451 | |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 452 | spin_lock_init(&kvm->arch.float_int.lock); |
| 453 | INIT_LIST_HEAD(&kvm->arch.float_int.list); |
Heiko Carstens | 8a242234 | 2014-01-10 14:33:28 +0100 | [diff] [blame] | 454 | init_waitqueue_head(&kvm->arch.ipte_wq); |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 455 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 456 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
| 457 | VM_EVENT(kvm, 3, "%s", "vm created"); |
| 458 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 459 | if (type & KVM_VM_S390_UCONTROL) { |
| 460 | kvm->arch.gmap = NULL; |
| 461 | } else { |
Christian Borntraeger | 0349985 | 2014-08-25 12:38:57 +0200 | [diff] [blame] | 462 | kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 463 | if (!kvm->arch.gmap) |
| 464 | goto out_nogmap; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 465 | kvm->arch.gmap->private = kvm; |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 466 | kvm->arch.gmap->pfault_enabled = 0; |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 467 | } |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 468 | |
| 469 | kvm->arch.css_support = 0; |
Cornelia Huck | 8422359 | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 470 | kvm->arch.use_irqchip = 0; |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 471 | |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 472 | spin_lock_init(&kvm->arch.start_stop_lock); |
| 473 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 474 | return 0; |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 475 | out_nogmap: |
Tony Krowiak | 5102ee8 | 2014-06-27 14:46:01 -0400 | [diff] [blame] | 476 | kfree(kvm->arch.crypto.crycb); |
| 477 | out_crypto: |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 478 | debug_unregister(kvm->arch.dbf); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 479 | out_nodbf: |
| 480 | free_page((unsigned long)(kvm->arch.sca)); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 481 | out_err: |
| 482 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 483 | } |
| 484 | |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 485 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
| 486 | { |
| 487 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); |
Cornelia Huck | ade38c3 | 2012-07-23 17:20:30 +0200 | [diff] [blame] | 488 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
Christian Borntraeger | 67335e6 | 2014-03-25 17:09:08 +0100 | [diff] [blame] | 489 | kvm_s390_clear_local_irqs(vcpu); |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 490 | kvm_clear_async_pf_completion_queue(vcpu); |
Carsten Otte | 58f9460 | 2012-01-04 10:25:27 +0100 | [diff] [blame] | 491 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 492 | clear_bit(63 - vcpu->vcpu_id, |
| 493 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
| 494 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
| 495 | (__u64) vcpu->arch.sie_block) |
| 496 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; |
| 497 | } |
Carsten Otte | abf4a71 | 2009-05-12 17:21:51 +0200 | [diff] [blame] | 498 | smp_mb(); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 499 | |
| 500 | if (kvm_is_ucontrol(vcpu->kvm)) |
| 501 | gmap_free(vcpu->arch.gmap); |
| 502 | |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 503 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
| 504 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 505 | free_page((unsigned long)(vcpu->arch.sie_block)); |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 506 | |
Christian Borntraeger | 6692cef | 2008-11-26 14:51:08 +0100 | [diff] [blame] | 507 | kvm_vcpu_uninit(vcpu); |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 508 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | static void kvm_free_vcpus(struct kvm *kvm) |
| 512 | { |
| 513 | unsigned int i; |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 514 | struct kvm_vcpu *vcpu; |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 515 | |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 516 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 517 | kvm_arch_vcpu_destroy(vcpu); |
| 518 | |
| 519 | mutex_lock(&kvm->lock); |
| 520 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) |
| 521 | kvm->vcpus[i] = NULL; |
| 522 | |
| 523 | atomic_set(&kvm->online_vcpus, 0); |
| 524 | mutex_unlock(&kvm->lock); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 525 | } |
| 526 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 527 | void kvm_arch_destroy_vm(struct kvm *kvm) |
| 528 | { |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 529 | kvm_free_vcpus(kvm); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 530 | free_page((unsigned long)(kvm->arch.sca)); |
Christian Borntraeger | d329c03 | 2008-11-26 14:50:27 +0100 | [diff] [blame] | 531 | debug_unregister(kvm->arch.dbf); |
Tony Krowiak | 5102ee8 | 2014-06-27 14:46:01 -0400 | [diff] [blame] | 532 | kfree(kvm->arch.crypto.crycb); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 533 | if (!kvm_is_ucontrol(kvm)) |
| 534 | gmap_free(kvm->arch.gmap); |
Cornelia Huck | 841b91c | 2013-07-15 13:36:01 +0200 | [diff] [blame] | 535 | kvm_s390_destroy_adapters(kvm); |
Christian Borntraeger | 67335e6 | 2014-03-25 17:09:08 +0100 | [diff] [blame] | 536 | kvm_s390_clear_float_irqs(kvm); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | /* Section: vcpu related */ |
| 540 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| 541 | { |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 542 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
| 543 | kvm_clear_async_pf_completion_queue(vcpu); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 544 | if (kvm_is_ucontrol(vcpu->kvm)) { |
Martin Schwidefsky | c6c956b | 2014-07-01 14:36:04 +0200 | [diff] [blame] | 545 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 546 | if (!vcpu->arch.gmap) |
| 547 | return -ENOMEM; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 548 | vcpu->arch.gmap->private = vcpu->kvm; |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 549 | return 0; |
| 550 | } |
| 551 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 552 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 553 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
| 554 | KVM_SYNC_GPRS | |
Christian Borntraeger | 9eed0735 | 2012-02-06 10:59:07 +0100 | [diff] [blame] | 555 | KVM_SYNC_ACRS | |
David Hildenbrand | b028ee3 | 2014-07-17 10:47:43 +0200 | [diff] [blame] | 556 | KVM_SYNC_CRS | |
| 557 | KVM_SYNC_ARCH0 | |
| 558 | KVM_SYNC_PFAULT; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 559 | return 0; |
| 560 | } |
| 561 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 562 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 563 | { |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 564 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
| 565 | save_fp_regs(vcpu->arch.host_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 566 | save_access_regs(vcpu->arch.host_acrs); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 567 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 568 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 569 | restore_access_regs(vcpu->run->s.regs.acrs); |
Christian Borntraeger | 480e592 | 2011-09-20 17:07:28 +0200 | [diff] [blame] | 570 | gmap_enable(vcpu->arch.gmap); |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 571 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 575 | { |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 576 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
Christian Borntraeger | 480e592 | 2011-09-20 17:07:28 +0200 | [diff] [blame] | 577 | gmap_disable(vcpu->arch.gmap); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 578 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 579 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 580 | save_access_regs(vcpu->run->s.regs.acrs); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 581 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
| 582 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 583 | restore_access_regs(vcpu->arch.host_acrs); |
| 584 | } |
| 585 | |
| 586 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) |
| 587 | { |
| 588 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ |
| 589 | vcpu->arch.sie_block->gpsw.mask = 0UL; |
| 590 | vcpu->arch.sie_block->gpsw.addr = 0UL; |
Christian Borntraeger | 8d26cf7 | 2012-01-11 11:19:32 +0100 | [diff] [blame] | 591 | kvm_s390_set_prefix(vcpu, 0); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 592 | vcpu->arch.sie_block->cputm = 0UL; |
| 593 | vcpu->arch.sie_block->ckc = 0UL; |
| 594 | vcpu->arch.sie_block->todpr = 0; |
| 595 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); |
| 596 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; |
| 597 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; |
| 598 | vcpu->arch.guest_fpregs.fpc = 0; |
| 599 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); |
| 600 | vcpu->arch.sie_block->gbea = 1; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 601 | vcpu->arch.sie_block->pp = 0; |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 602 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
| 603 | kvm_clear_async_pf_completion_queue(vcpu); |
David Hildenbrand | 6352e4d | 2014-04-10 17:35:00 +0200 | [diff] [blame] | 604 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
| 605 | kvm_s390_vcpu_stop(vcpu); |
Jens Freimann | 2ed10cc | 2014-02-11 13:48:07 +0100 | [diff] [blame] | 606 | kvm_s390_clear_local_irqs(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 607 | } |
| 608 | |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 609 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
| 610 | { |
| 611 | return 0; |
| 612 | } |
| 613 | |
Tony Krowiak | 5102ee8 | 2014-06-27 14:46:01 -0400 | [diff] [blame] | 614 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
| 615 | { |
| 616 | if (!test_vfacility(76)) |
| 617 | return; |
| 618 | |
| 619 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
| 620 | } |
| 621 | |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 622 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
| 623 | { |
| 624 | free_page(vcpu->arch.sie_block->cbrlo); |
| 625 | vcpu->arch.sie_block->cbrlo = 0; |
| 626 | } |
| 627 | |
| 628 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) |
| 629 | { |
| 630 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); |
| 631 | if (!vcpu->arch.sie_block->cbrlo) |
| 632 | return -ENOMEM; |
| 633 | |
| 634 | vcpu->arch.sie_block->ecb2 |= 0x80; |
| 635 | vcpu->arch.sie_block->ecb2 &= ~0x08; |
| 636 | return 0; |
| 637 | } |
| 638 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 639 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| 640 | { |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 641 | int rc = 0; |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 642 | |
Cornelia Huck | 9e6dabe | 2011-11-17 11:00:41 +0100 | [diff] [blame] | 643 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
| 644 | CPUSTAT_SM | |
Christian Borntraeger | 69d0d3a | 2013-06-12 13:54:53 +0200 | [diff] [blame] | 645 | CPUSTAT_STOPPED | |
| 646 | CPUSTAT_GED); |
Christian Borntraeger | fc34531 | 2010-06-17 23:16:20 +0200 | [diff] [blame] | 647 | vcpu->arch.sie_block->ecb = 6; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 648 | if (test_vfacility(50) && test_vfacility(73)) |
| 649 | vcpu->arch.sie_block->ecb |= 0x10; |
| 650 | |
Christian Borntraeger | 69d0d3a | 2013-06-12 13:54:53 +0200 | [diff] [blame] | 651 | vcpu->arch.sie_block->ecb2 = 8; |
David Hildenbrand | 4953919 | 2014-02-21 08:59:59 +0100 | [diff] [blame] | 652 | vcpu->arch.sie_block->eca = 0xD1002000U; |
Heiko Carstens | 217a440 | 2013-12-30 12:54:14 +0100 | [diff] [blame] | 653 | if (sclp_has_siif()) |
| 654 | vcpu->arch.sie_block->eca |= 1; |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 655 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
Matthew Rosato | 5a5e653 | 2013-01-29 11:48:20 -0500 | [diff] [blame] | 656 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE | |
| 657 | ICTL_TPROT; |
| 658 | |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 659 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
| 660 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
| 661 | if (rc) |
| 662 | return rc; |
Konstantin Weitz | b31288f | 2013-04-17 17:36:29 +0200 | [diff] [blame] | 663 | } |
Christian Borntraeger | ca87230 | 2009-05-12 17:21:49 +0200 | [diff] [blame] | 664 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
Christian Borntraeger | ca87230 | 2009-05-12 17:21:49 +0200 | [diff] [blame] | 665 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
Christian Borntraeger | 453423d | 2008-03-25 18:47:29 +0100 | [diff] [blame] | 666 | get_cpu_id(&vcpu->arch.cpu_id); |
Christian Borntraeger | 92e6ecf | 2009-03-26 15:23:58 +0100 | [diff] [blame] | 667 | vcpu->arch.cpu_id.version = 0xff; |
Tony Krowiak | 5102ee8 | 2014-06-27 14:46:01 -0400 | [diff] [blame] | 668 | |
| 669 | kvm_s390_vcpu_crypto_setup(vcpu); |
| 670 | |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 671 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 672 | } |
| 673 | |
| 674 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, |
| 675 | unsigned int id) |
| 676 | { |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 677 | struct kvm_vcpu *vcpu; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 678 | struct sie_page *sie_page; |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 679 | int rc = -EINVAL; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 680 | |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 681 | if (id >= KVM_MAX_VCPUS) |
| 682 | goto out; |
| 683 | |
| 684 | rc = -ENOMEM; |
| 685 | |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 686 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 687 | if (!vcpu) |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 688 | goto out; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 689 | |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 690 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
| 691 | if (!sie_page) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 692 | goto out_free_cpu; |
| 693 | |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 694 | vcpu->arch.sie_block = &sie_page->sie_block; |
| 695 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; |
| 696 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 697 | vcpu->arch.sie_block->icpua = id; |
Carsten Otte | 58f9460 | 2012-01-04 10:25:27 +0100 | [diff] [blame] | 698 | if (!kvm_is_ucontrol(kvm)) { |
| 699 | if (!kvm->arch.sca) { |
| 700 | WARN_ON_ONCE(1); |
| 701 | goto out_free_cpu; |
| 702 | } |
| 703 | if (!kvm->arch.sca->cpu[id].sda) |
| 704 | kvm->arch.sca->cpu[id].sda = |
| 705 | (__u64) vcpu->arch.sie_block; |
| 706 | vcpu->arch.sie_block->scaoh = |
| 707 | (__u32)(((__u64)kvm->arch.sca) >> 32); |
| 708 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; |
| 709 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
| 710 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 711 | |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 712 | spin_lock_init(&vcpu->arch.local_int.lock); |
| 713 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); |
| 714 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
Christian Borntraeger | d0321a2 | 2013-06-12 13:54:55 +0200 | [diff] [blame] | 715 | vcpu->arch.local_int.wq = &vcpu->wq; |
Christian Borntraeger | 5288fbf | 2008-03-25 18:47:31 +0100 | [diff] [blame] | 716 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 717 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 718 | rc = kvm_vcpu_init(vcpu, kvm, id); |
| 719 | if (rc) |
Wei Yongjun | 7b06bf2 | 2010-03-09 14:37:53 +0800 | [diff] [blame] | 720 | goto out_free_sie_block; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 721 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
| 722 | vcpu->arch.sie_block); |
Cornelia Huck | ade38c3 | 2012-07-23 17:20:30 +0200 | [diff] [blame] | 723 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 724 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 725 | return vcpu; |
Wei Yongjun | 7b06bf2 | 2010-03-09 14:37:53 +0800 | [diff] [blame] | 726 | out_free_sie_block: |
| 727 | free_page((unsigned long)(vcpu->arch.sie_block)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 728 | out_free_cpu: |
Michael Mueller | b110fea | 2013-06-12 13:54:54 +0200 | [diff] [blame] | 729 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Carsten Otte | 4d47555 | 2011-10-18 12:27:12 +0200 | [diff] [blame] | 730 | out: |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 731 | return ERR_PTR(rc); |
| 732 | } |
| 733 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 734 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
| 735 | { |
Michael Mueller | f87618e | 2014-02-26 16:14:17 +0100 | [diff] [blame] | 736 | return kvm_cpu_has_interrupt(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 737 | } |
| 738 | |
Christian Borntraeger | 49b99e1 | 2013-05-17 14:41:35 +0200 | [diff] [blame] | 739 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
| 740 | { |
| 741 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
| 742 | } |
| 743 | |
| 744 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
| 745 | { |
| 746 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * Kick a guest cpu out of SIE and wait until SIE is not running. |
| 751 | * If the CPU is not running (e.g. waiting as idle) the function will |
| 752 | * return immediately. */ |
| 753 | void exit_sie(struct kvm_vcpu *vcpu) |
| 754 | { |
| 755 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
| 756 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
| 757 | cpu_relax(); |
| 758 | } |
| 759 | |
| 760 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ |
| 761 | void exit_sie_sync(struct kvm_vcpu *vcpu) |
| 762 | { |
| 763 | s390_vcpu_block(vcpu); |
| 764 | exit_sie(vcpu); |
| 765 | } |
| 766 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 767 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
| 768 | { |
| 769 | int i; |
| 770 | struct kvm *kvm = gmap->private; |
| 771 | struct kvm_vcpu *vcpu; |
| 772 | |
| 773 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 774 | /* match against both prefix pages */ |
Michael Mueller | fda902c | 2014-05-13 16:58:30 +0200 | [diff] [blame] | 775 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 776 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
| 777 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); |
| 778 | exit_sie_sync(vcpu); |
| 779 | } |
| 780 | } |
| 781 | } |
| 782 | |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 783 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
| 784 | { |
| 785 | /* kvm common code refers to this, but never calls it */ |
| 786 | BUG(); |
| 787 | return 0; |
| 788 | } |
| 789 | |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 790 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
| 791 | struct kvm_one_reg *reg) |
| 792 | { |
| 793 | int r = -EINVAL; |
| 794 | |
| 795 | switch (reg->id) { |
Carsten Otte | 29b7c71 | 2012-05-15 14:15:27 +0200 | [diff] [blame] | 796 | case KVM_REG_S390_TODPR: |
| 797 | r = put_user(vcpu->arch.sie_block->todpr, |
| 798 | (u32 __user *)reg->addr); |
| 799 | break; |
| 800 | case KVM_REG_S390_EPOCHDIFF: |
| 801 | r = put_user(vcpu->arch.sie_block->epoch, |
| 802 | (u64 __user *)reg->addr); |
| 803 | break; |
Jason J. herne | 46a6dd1 | 2012-05-15 14:15:28 +0200 | [diff] [blame] | 804 | case KVM_REG_S390_CPU_TIMER: |
| 805 | r = put_user(vcpu->arch.sie_block->cputm, |
| 806 | (u64 __user *)reg->addr); |
| 807 | break; |
| 808 | case KVM_REG_S390_CLOCK_COMP: |
| 809 | r = put_user(vcpu->arch.sie_block->ckc, |
| 810 | (u64 __user *)reg->addr); |
| 811 | break; |
Dominik Dingel | 536336c | 2013-09-30 10:55:33 +0200 | [diff] [blame] | 812 | case KVM_REG_S390_PFTOKEN: |
| 813 | r = put_user(vcpu->arch.pfault_token, |
| 814 | (u64 __user *)reg->addr); |
| 815 | break; |
| 816 | case KVM_REG_S390_PFCOMPARE: |
| 817 | r = put_user(vcpu->arch.pfault_compare, |
| 818 | (u64 __user *)reg->addr); |
| 819 | break; |
| 820 | case KVM_REG_S390_PFSELECT: |
| 821 | r = put_user(vcpu->arch.pfault_select, |
| 822 | (u64 __user *)reg->addr); |
| 823 | break; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 824 | case KVM_REG_S390_PP: |
| 825 | r = put_user(vcpu->arch.sie_block->pp, |
| 826 | (u64 __user *)reg->addr); |
| 827 | break; |
Christian Borntraeger | afa45ff | 2014-02-10 15:39:23 +0100 | [diff] [blame] | 828 | case KVM_REG_S390_GBEA: |
| 829 | r = put_user(vcpu->arch.sie_block->gbea, |
| 830 | (u64 __user *)reg->addr); |
| 831 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 832 | default: |
| 833 | break; |
| 834 | } |
| 835 | |
| 836 | return r; |
| 837 | } |
| 838 | |
| 839 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, |
| 840 | struct kvm_one_reg *reg) |
| 841 | { |
| 842 | int r = -EINVAL; |
| 843 | |
| 844 | switch (reg->id) { |
Carsten Otte | 29b7c71 | 2012-05-15 14:15:27 +0200 | [diff] [blame] | 845 | case KVM_REG_S390_TODPR: |
| 846 | r = get_user(vcpu->arch.sie_block->todpr, |
| 847 | (u32 __user *)reg->addr); |
| 848 | break; |
| 849 | case KVM_REG_S390_EPOCHDIFF: |
| 850 | r = get_user(vcpu->arch.sie_block->epoch, |
| 851 | (u64 __user *)reg->addr); |
| 852 | break; |
Jason J. herne | 46a6dd1 | 2012-05-15 14:15:28 +0200 | [diff] [blame] | 853 | case KVM_REG_S390_CPU_TIMER: |
| 854 | r = get_user(vcpu->arch.sie_block->cputm, |
| 855 | (u64 __user *)reg->addr); |
| 856 | break; |
| 857 | case KVM_REG_S390_CLOCK_COMP: |
| 858 | r = get_user(vcpu->arch.sie_block->ckc, |
| 859 | (u64 __user *)reg->addr); |
| 860 | break; |
Dominik Dingel | 536336c | 2013-09-30 10:55:33 +0200 | [diff] [blame] | 861 | case KVM_REG_S390_PFTOKEN: |
| 862 | r = get_user(vcpu->arch.pfault_token, |
| 863 | (u64 __user *)reg->addr); |
| 864 | break; |
| 865 | case KVM_REG_S390_PFCOMPARE: |
| 866 | r = get_user(vcpu->arch.pfault_compare, |
| 867 | (u64 __user *)reg->addr); |
| 868 | break; |
| 869 | case KVM_REG_S390_PFSELECT: |
| 870 | r = get_user(vcpu->arch.pfault_select, |
| 871 | (u64 __user *)reg->addr); |
| 872 | break; |
Christian Borntraeger | 672550f | 2014-02-10 15:32:19 +0100 | [diff] [blame] | 873 | case KVM_REG_S390_PP: |
| 874 | r = get_user(vcpu->arch.sie_block->pp, |
| 875 | (u64 __user *)reg->addr); |
| 876 | break; |
Christian Borntraeger | afa45ff | 2014-02-10 15:39:23 +0100 | [diff] [blame] | 877 | case KVM_REG_S390_GBEA: |
| 878 | r = get_user(vcpu->arch.sie_block->gbea, |
| 879 | (u64 __user *)reg->addr); |
| 880 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 881 | default: |
| 882 | break; |
| 883 | } |
| 884 | |
| 885 | return r; |
| 886 | } |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 887 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 888 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
| 889 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 890 | kvm_s390_vcpu_initial_reset(vcpu); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 891 | return 0; |
| 892 | } |
| 893 | |
| 894 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 895 | { |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 896 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 897 | return 0; |
| 898 | } |
| 899 | |
| 900 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| 901 | { |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 902 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 903 | return 0; |
| 904 | } |
| 905 | |
| 906 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 907 | struct kvm_sregs *sregs) |
| 908 | { |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 909 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 910 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 911 | restore_access_regs(vcpu->run->s.regs.acrs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 916 | struct kvm_sregs *sregs) |
| 917 | { |
Christian Borntraeger | 59674c1 | 2012-01-11 11:20:33 +0100 | [diff] [blame] | 918 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 919 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 920 | return 0; |
| 921 | } |
| 922 | |
| 923 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 924 | { |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 925 | if (test_fp_ctl(fpu->fpc)) |
| 926 | return -EINVAL; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 927 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
Martin Schwidefsky | 4725c86 | 2013-10-15 16:08:34 +0200 | [diff] [blame] | 928 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
| 929 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 930 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 931 | return 0; |
| 932 | } |
| 933 | |
| 934 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| 935 | { |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 936 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
| 937 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 938 | return 0; |
| 939 | } |
| 940 | |
| 941 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) |
| 942 | { |
| 943 | int rc = 0; |
| 944 | |
David Hildenbrand | 7a42fdc | 2014-05-05 16:26:19 +0200 | [diff] [blame] | 945 | if (!is_vcpu_stopped(vcpu)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 946 | rc = -EBUSY; |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 947 | else { |
| 948 | vcpu->run->psw_mask = psw.mask; |
| 949 | vcpu->run->psw_addr = psw.addr; |
| 950 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 951 | return rc; |
| 952 | } |
| 953 | |
| 954 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| 955 | struct kvm_translation *tr) |
| 956 | { |
| 957 | return -EINVAL; /* not implemented yet */ |
| 958 | } |
| 959 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 960 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
| 961 | KVM_GUESTDBG_USE_HW_BP | \ |
| 962 | KVM_GUESTDBG_ENABLE) |
| 963 | |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 964 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| 965 | struct kvm_guest_debug *dbg) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 966 | { |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 967 | int rc = 0; |
| 968 | |
| 969 | vcpu->guest_debug = 0; |
| 970 | kvm_s390_clear_bp_data(vcpu); |
| 971 | |
David Hildenbrand | 2de3bfc | 2014-05-20 17:25:20 +0200 | [diff] [blame] | 972 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 973 | return -EINVAL; |
| 974 | |
| 975 | if (dbg->control & KVM_GUESTDBG_ENABLE) { |
| 976 | vcpu->guest_debug = dbg->control; |
| 977 | /* enforce guest PER */ |
| 978 | atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
| 979 | |
| 980 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) |
| 981 | rc = kvm_s390_import_bp_data(vcpu, dbg); |
| 982 | } else { |
| 983 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
| 984 | vcpu->arch.guestdbg.last_bp = 0; |
| 985 | } |
| 986 | |
| 987 | if (rc) { |
| 988 | vcpu->guest_debug = 0; |
| 989 | kvm_s390_clear_bp_data(vcpu); |
| 990 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
| 991 | } |
| 992 | |
| 993 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 994 | } |
| 995 | |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 996 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| 997 | struct kvm_mp_state *mp_state) |
| 998 | { |
David Hildenbrand | 6352e4d | 2014-04-10 17:35:00 +0200 | [diff] [blame] | 999 | /* CHECK_STOP and LOAD are not supported yet */ |
| 1000 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : |
| 1001 | KVM_MP_STATE_OPERATING; |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| 1005 | struct kvm_mp_state *mp_state) |
| 1006 | { |
David Hildenbrand | 6352e4d | 2014-04-10 17:35:00 +0200 | [diff] [blame] | 1007 | int rc = 0; |
| 1008 | |
| 1009 | /* user space knows about this interface - let it control the state */ |
| 1010 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; |
| 1011 | |
| 1012 | switch (mp_state->mp_state) { |
| 1013 | case KVM_MP_STATE_STOPPED: |
| 1014 | kvm_s390_vcpu_stop(vcpu); |
| 1015 | break; |
| 1016 | case KVM_MP_STATE_OPERATING: |
| 1017 | kvm_s390_vcpu_start(vcpu); |
| 1018 | break; |
| 1019 | case KVM_MP_STATE_LOAD: |
| 1020 | case KVM_MP_STATE_CHECK_STOP: |
| 1021 | /* fall through - CHECK_STOP and LOAD are not supported yet */ |
| 1022 | default: |
| 1023 | rc = -ENXIO; |
| 1024 | } |
| 1025 | |
| 1026 | return rc; |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 1027 | } |
| 1028 | |
Dominik Dingel | b31605c | 2014-03-25 13:47:11 +0100 | [diff] [blame] | 1029 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
| 1030 | { |
| 1031 | if (!MACHINE_IS_LPAR) |
| 1032 | return false; |
| 1033 | /* only enable for z10 and later */ |
| 1034 | if (!MACHINE_HAS_EDAT1) |
| 1035 | return false; |
| 1036 | if (!kvm->arch.use_cmma) |
| 1037 | return false; |
| 1038 | return true; |
| 1039 | } |
| 1040 | |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1041 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
| 1042 | { |
| 1043 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; |
| 1044 | } |
| 1045 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1046 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
| 1047 | { |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1048 | retry: |
| 1049 | s390_vcpu_unblock(vcpu); |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1050 | /* |
| 1051 | * We use MMU_RELOAD just to re-arm the ipte notifier for the |
| 1052 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. |
| 1053 | * This ensures that the ipte instruction for this request has |
| 1054 | * already finished. We might race against a second unmapper that |
| 1055 | * wants to set the blocking bit. Lets just retry the request loop. |
| 1056 | */ |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1057 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1058 | int rc; |
| 1059 | rc = gmap_ipte_notify(vcpu->arch.gmap, |
Michael Mueller | fda902c | 2014-05-13 16:58:30 +0200 | [diff] [blame] | 1060 | kvm_s390_get_prefix(vcpu), |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1061 | PAGE_SIZE * 2); |
| 1062 | if (rc) |
| 1063 | return rc; |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1064 | goto retry; |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1065 | } |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1066 | |
David Hildenbrand | d3d692c | 2014-07-29 08:53:36 +0200 | [diff] [blame] | 1067 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
| 1068 | vcpu->arch.sie_block->ihcpu = 0xffff; |
| 1069 | goto retry; |
| 1070 | } |
| 1071 | |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1072 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
| 1073 | if (!ibs_enabled(vcpu)) { |
| 1074 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); |
| 1075 | atomic_set_mask(CPUSTAT_IBS, |
| 1076 | &vcpu->arch.sie_block->cpuflags); |
| 1077 | } |
| 1078 | goto retry; |
| 1079 | } |
| 1080 | |
| 1081 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { |
| 1082 | if (ibs_enabled(vcpu)) { |
| 1083 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); |
| 1084 | atomic_clear_mask(CPUSTAT_IBS, |
| 1085 | &vcpu->arch.sie_block->cpuflags); |
| 1086 | } |
| 1087 | goto retry; |
| 1088 | } |
| 1089 | |
David Hildenbrand | 0759d06 | 2014-05-13 16:54:32 +0200 | [diff] [blame] | 1090 | /* nothing to do, just clear the request */ |
| 1091 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
| 1092 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1093 | return 0; |
| 1094 | } |
| 1095 | |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1096 | /** |
| 1097 | * kvm_arch_fault_in_page - fault-in guest page if necessary |
| 1098 | * @vcpu: The corresponding virtual cpu |
| 1099 | * @gpa: Guest physical address |
| 1100 | * @writable: Whether the page should be writable or not |
| 1101 | * |
| 1102 | * Make sure that a guest page has been faulted-in on the host. |
| 1103 | * |
| 1104 | * Return: Zero on success, negative error code otherwise. |
| 1105 | */ |
| 1106 | 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] | 1107 | { |
Martin Schwidefsky | 527e30b | 2014-04-30 16:04:25 +0200 | [diff] [blame] | 1108 | return gmap_fault(vcpu->arch.gmap, gpa, |
| 1109 | writable ? FAULT_FLAG_WRITE : 0); |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1110 | } |
| 1111 | |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 1112 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
| 1113 | unsigned long token) |
| 1114 | { |
| 1115 | struct kvm_s390_interrupt inti; |
| 1116 | inti.parm64 = token; |
| 1117 | |
| 1118 | if (start_token) { |
| 1119 | inti.type = KVM_S390_INT_PFAULT_INIT; |
| 1120 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &inti)); |
| 1121 | } else { |
| 1122 | inti.type = KVM_S390_INT_PFAULT_DONE; |
| 1123 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
| 1124 | } |
| 1125 | } |
| 1126 | |
| 1127 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
| 1128 | struct kvm_async_pf *work) |
| 1129 | { |
| 1130 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); |
| 1131 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); |
| 1132 | } |
| 1133 | |
| 1134 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, |
| 1135 | struct kvm_async_pf *work) |
| 1136 | { |
| 1137 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); |
| 1138 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); |
| 1139 | } |
| 1140 | |
| 1141 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, |
| 1142 | struct kvm_async_pf *work) |
| 1143 | { |
| 1144 | /* s390 will always inject the page directly */ |
| 1145 | } |
| 1146 | |
| 1147 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) |
| 1148 | { |
| 1149 | /* |
| 1150 | * s390 will always inject the page directly, |
| 1151 | * but we still want check_async_completion to cleanup |
| 1152 | */ |
| 1153 | return true; |
| 1154 | } |
| 1155 | |
| 1156 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) |
| 1157 | { |
| 1158 | hva_t hva; |
| 1159 | struct kvm_arch_async_pf arch; |
| 1160 | int rc; |
| 1161 | |
| 1162 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
| 1163 | return 0; |
| 1164 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != |
| 1165 | vcpu->arch.pfault_compare) |
| 1166 | return 0; |
| 1167 | if (psw_extint_disabled(vcpu)) |
| 1168 | return 0; |
| 1169 | if (kvm_cpu_has_interrupt(vcpu)) |
| 1170 | return 0; |
| 1171 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) |
| 1172 | return 0; |
| 1173 | if (!vcpu->arch.gmap->pfault_enabled) |
| 1174 | return 0; |
| 1175 | |
Heiko Carstens | 81480cc | 2014-01-01 16:36:07 +0100 | [diff] [blame] | 1176 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
| 1177 | hva += current->thread.gmap_addr & ~PAGE_MASK; |
| 1178 | 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] | 1179 | return 0; |
| 1180 | |
| 1181 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); |
| 1182 | return rc; |
| 1183 | } |
| 1184 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1185 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1186 | { |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1187 | int rc, cpuflags; |
Carsten Otte | e168bf8 | 2012-01-04 10:25:22 +0100 | [diff] [blame] | 1188 | |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 1189 | /* |
| 1190 | * On s390 notifications for arriving pages will be delivered directly |
| 1191 | * to the guest but the house keeping for completed pfaults is |
| 1192 | * handled outside the worker. |
| 1193 | */ |
| 1194 | kvm_check_async_pf_completion(vcpu); |
| 1195 | |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 1196 | 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] | 1197 | |
| 1198 | if (need_resched()) |
| 1199 | schedule(); |
| 1200 | |
Martin Schwidefsky | d3a73ac | 2014-04-15 12:55:07 +0200 | [diff] [blame] | 1201 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
Christian Borntraeger | 71cde58 | 2008-05-21 13:37:34 +0200 | [diff] [blame] | 1202 | s390_handle_mcck(); |
| 1203 | |
Jens Freimann | 7939503 | 2014-04-17 10:10:30 +0200 | [diff] [blame] | 1204 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 1205 | rc = kvm_s390_deliver_pending_interrupts(vcpu); |
| 1206 | if (rc) |
| 1207 | return rc; |
| 1208 | } |
Carsten Otte | 0ff3186 | 2008-05-21 13:37:37 +0200 | [diff] [blame] | 1209 | |
Christian Borntraeger | 2c70fe4 | 2013-05-17 14:41:36 +0200 | [diff] [blame] | 1210 | rc = kvm_s390_handle_requests(vcpu); |
| 1211 | if (rc) |
| 1212 | return rc; |
| 1213 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1214 | if (guestdbg_enabled(vcpu)) { |
| 1215 | kvm_s390_backup_guest_per_regs(vcpu); |
| 1216 | kvm_s390_patch_guest_per_regs(vcpu); |
| 1217 | } |
| 1218 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1219 | vcpu->arch.sie_block->icptcode = 0; |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1220 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
| 1221 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); |
| 1222 | trace_kvm_s390_sie_enter(vcpu, cpuflags); |
Dominik Dingel | 2b29a9f | 2013-07-26 15:04:00 +0200 | [diff] [blame] | 1223 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1224 | return 0; |
| 1225 | } |
| 1226 | |
| 1227 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
| 1228 | { |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1229 | int rc = -1; |
Dominik Dingel | 2b29a9f | 2013-07-26 15:04:00 +0200 | [diff] [blame] | 1230 | |
| 1231 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
| 1232 | vcpu->arch.sie_block->icptcode); |
| 1233 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); |
| 1234 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1235 | if (guestdbg_enabled(vcpu)) |
| 1236 | kvm_s390_restore_guest_per_regs(vcpu); |
| 1237 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1238 | if (exit_reason >= 0) { |
Martin Schwidefsky | 7c47053 | 2013-05-17 14:41:37 +0200 | [diff] [blame] | 1239 | rc = 0; |
Thomas Huth | 210b1607 | 2013-09-19 16:26:18 +0200 | [diff] [blame] | 1240 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
| 1241 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; |
| 1242 | vcpu->run->s390_ucontrol.trans_exc_code = |
| 1243 | current->thread.gmap_addr; |
| 1244 | vcpu->run->s390_ucontrol.pgm_code = 0x10; |
| 1245 | rc = -EREMOTE; |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1246 | |
| 1247 | } else if (current->thread.gmap_pfault) { |
Dominik Dingel | 3c038e6 | 2013-10-07 17:11:48 +0200 | [diff] [blame] | 1248 | trace_kvm_s390_major_guest_pfault(vcpu); |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1249 | current->thread.gmap_pfault = 0; |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1250 | if (kvm_arch_setup_async_pf(vcpu)) { |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1251 | rc = 0; |
Thomas Huth | fa576c5 | 2014-05-06 17:20:16 +0200 | [diff] [blame] | 1252 | } else { |
| 1253 | gpa_t gpa = current->thread.gmap_addr; |
| 1254 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); |
| 1255 | } |
Dominik Dingel | 24eb3a8 | 2013-06-17 16:25:18 +0200 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | if (rc == -1) { |
Christian Borntraeger | 699bde3 | 2014-01-20 12:34:13 +0100 | [diff] [blame] | 1259 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
| 1260 | trace_kvm_s390_sie_fault(vcpu); |
| 1261 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
Carsten Otte | 1f0d0f0 | 2008-05-21 13:37:40 +0200 | [diff] [blame] | 1262 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1263 | |
Christian Borntraeger | 5a32c1a | 2012-01-11 11:20:32 +0100 | [diff] [blame] | 1264 | 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] | 1265 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1266 | if (rc == 0) { |
| 1267 | if (kvm_is_ucontrol(vcpu->kvm)) |
Christian Borntraeger | 2955c83 | 2014-03-06 16:01:38 +0100 | [diff] [blame] | 1268 | /* Don't exit for host interrupts. */ |
| 1269 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1270 | else |
| 1271 | rc = kvm_handle_sie_intercept(vcpu); |
| 1272 | } |
| 1273 | |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1274 | return rc; |
| 1275 | } |
| 1276 | |
| 1277 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
| 1278 | { |
| 1279 | int rc, exit_reason; |
| 1280 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1281 | /* |
| 1282 | * We try to hold kvm->srcu during most of vcpu_run (except when run- |
| 1283 | * ning the guest), so that memslots (and other stuff) are protected |
| 1284 | */ |
| 1285 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| 1286 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1287 | do { |
| 1288 | rc = vcpu_pre_run(vcpu); |
| 1289 | if (rc) |
| 1290 | break; |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1291 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1292 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1293 | /* |
| 1294 | * As PF_VCPU will be used in fault handler, between |
| 1295 | * guest_enter and guest_exit should be no uaccess. |
| 1296 | */ |
| 1297 | preempt_disable(); |
| 1298 | kvm_guest_enter(); |
| 1299 | preempt_enable(); |
| 1300 | exit_reason = sie64a(vcpu->arch.sie_block, |
| 1301 | vcpu->run->s.regs.gprs); |
| 1302 | kvm_guest_exit(); |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1303 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1304 | |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1305 | rc = vcpu_post_run(vcpu, exit_reason); |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1306 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
Thomas Huth | 3fb4c40 | 2013-09-12 10:33:43 +0200 | [diff] [blame] | 1307 | |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1308 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
Carsten Otte | e168bf8 | 2012-01-04 10:25:22 +0100 | [diff] [blame] | 1309 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1310 | } |
| 1311 | |
David Hildenbrand | b028ee3 | 2014-07-17 10:47:43 +0200 | [diff] [blame] | 1312 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1313 | { |
| 1314 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
| 1315 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; |
| 1316 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) |
| 1317 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); |
| 1318 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
| 1319 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); |
David Hildenbrand | d3d692c | 2014-07-29 08:53:36 +0200 | [diff] [blame] | 1320 | /* some control register changes require a tlb flush */ |
| 1321 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
David Hildenbrand | b028ee3 | 2014-07-17 10:47:43 +0200 | [diff] [blame] | 1322 | } |
| 1323 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { |
| 1324 | vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; |
| 1325 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; |
| 1326 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; |
| 1327 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; |
| 1328 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; |
| 1329 | } |
| 1330 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { |
| 1331 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; |
| 1332 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; |
| 1333 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; |
| 1334 | } |
| 1335 | kvm_run->kvm_dirty_regs = 0; |
| 1336 | } |
| 1337 | |
| 1338 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1339 | { |
| 1340 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
| 1341 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; |
| 1342 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); |
| 1343 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
| 1344 | kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; |
| 1345 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; |
| 1346 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; |
| 1347 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; |
| 1348 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; |
| 1349 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; |
| 1350 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; |
| 1351 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; |
| 1352 | } |
| 1353 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1354 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1355 | { |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1356 | int rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1357 | sigset_t sigsaved; |
| 1358 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1359 | if (guestdbg_exit_pending(vcpu)) { |
| 1360 | kvm_s390_prepare_debug_exit(vcpu); |
| 1361 | return 0; |
| 1362 | } |
| 1363 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1364 | if (vcpu->sigset_active) |
| 1365 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
| 1366 | |
David Hildenbrand | 6352e4d | 2014-04-10 17:35:00 +0200 | [diff] [blame] | 1367 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
| 1368 | kvm_s390_vcpu_start(vcpu); |
| 1369 | } else if (is_vcpu_stopped(vcpu)) { |
| 1370 | pr_err_ratelimited("kvm-s390: can't run stopped vcpu %d\n", |
| 1371 | vcpu->vcpu_id); |
| 1372 | return -EINVAL; |
| 1373 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1374 | |
David Hildenbrand | b028ee3 | 2014-07-17 10:47:43 +0200 | [diff] [blame] | 1375 | sync_regs(vcpu, kvm_run); |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1376 | |
Heiko Carstens | dab4079d | 2009-06-12 10:26:32 +0200 | [diff] [blame] | 1377 | might_fault(); |
Thomas Huth | a76ccff | 2013-09-12 10:33:44 +0200 | [diff] [blame] | 1378 | rc = __vcpu_run(vcpu); |
Christian Ehrhardt | 9ace903 | 2009-05-20 15:34:55 +0200 | [diff] [blame] | 1379 | |
Christian Ehrhardt | b1d16c4 | 2009-05-20 15:34:56 +0200 | [diff] [blame] | 1380 | if (signal_pending(current) && !rc) { |
| 1381 | kvm_run->exit_reason = KVM_EXIT_INTR; |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1382 | rc = -EINTR; |
Christian Ehrhardt | b1d16c4 | 2009-05-20 15:34:56 +0200 | [diff] [blame] | 1383 | } |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1384 | |
David Hildenbrand | 27291e2 | 2014-01-23 12:26:52 +0100 | [diff] [blame] | 1385 | if (guestdbg_exit_pending(vcpu) && !rc) { |
| 1386 | kvm_s390_prepare_debug_exit(vcpu); |
| 1387 | rc = 0; |
| 1388 | } |
| 1389 | |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 1390 | if (rc == -EOPNOTSUPP) { |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1391 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
| 1392 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; |
| 1393 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; |
Christian Borntraeger | 8f2abe6 | 2008-03-25 18:47:23 +0100 | [diff] [blame] | 1394 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
| 1395 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; |
| 1396 | rc = 0; |
| 1397 | } |
| 1398 | |
| 1399 | if (rc == -EREMOTE) { |
| 1400 | /* intercept was handled, but userspace support is needed |
| 1401 | * kvm_run has been prepared by the handler */ |
| 1402 | rc = 0; |
| 1403 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1404 | |
David Hildenbrand | b028ee3 | 2014-07-17 10:47:43 +0200 | [diff] [blame] | 1405 | store_regs(vcpu, kvm_run); |
Carsten Otte | d7b0b5e | 2009-11-19 14:21:16 +0100 | [diff] [blame] | 1406 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1407 | if (vcpu->sigset_active) |
| 1408 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1409 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1410 | vcpu->stat.exit_userspace++; |
Heiko Carstens | 7e8e6ab | 2008-04-04 15:12:35 +0200 | [diff] [blame] | 1411 | return rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1412 | } |
| 1413 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1414 | /* |
| 1415 | * store status at address |
| 1416 | * we use have two special cases: |
| 1417 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit |
| 1418 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix |
| 1419 | */ |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1420 | 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] | 1421 | { |
Carsten Otte | 092670c | 2011-07-24 10:48:22 +0200 | [diff] [blame] | 1422 | unsigned char archmode = 1; |
Michael Mueller | fda902c | 2014-05-13 16:58:30 +0200 | [diff] [blame] | 1423 | unsigned int px; |
Thomas Huth | 178bd78 | 2013-11-13 20:28:18 +0100 | [diff] [blame] | 1424 | u64 clkcomp; |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1425 | int rc; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1426 | |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1427 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
| 1428 | if (write_guest_abs(vcpu, 163, &archmode, 1)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1429 | return -EFAULT; |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1430 | gpa = SAVE_AREA_BASE; |
| 1431 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
| 1432 | if (write_guest_real(vcpu, 163, &archmode, 1)) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1433 | return -EFAULT; |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1434 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
| 1435 | } |
| 1436 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), |
| 1437 | vcpu->arch.guest_fpregs.fprs, 128); |
| 1438 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), |
| 1439 | vcpu->run->s.regs.gprs, 128); |
| 1440 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), |
| 1441 | &vcpu->arch.sie_block->gpsw, 16); |
Michael Mueller | fda902c | 2014-05-13 16:58:30 +0200 | [diff] [blame] | 1442 | px = kvm_s390_get_prefix(vcpu); |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1443 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
Michael Mueller | fda902c | 2014-05-13 16:58:30 +0200 | [diff] [blame] | 1444 | &px, 4); |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1445 | rc |= write_guest_abs(vcpu, |
| 1446 | gpa + offsetof(struct save_area, fp_ctrl_reg), |
| 1447 | &vcpu->arch.guest_fpregs.fpc, 4); |
| 1448 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), |
| 1449 | &vcpu->arch.sie_block->todpr, 4); |
| 1450 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), |
| 1451 | &vcpu->arch.sie_block->cputm, 8); |
Thomas Huth | 178bd78 | 2013-11-13 20:28:18 +0100 | [diff] [blame] | 1452 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
Heiko Carstens | d0bce60 | 2014-01-01 16:45:58 +0100 | [diff] [blame] | 1453 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
| 1454 | &clkcomp, 8); |
| 1455 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), |
| 1456 | &vcpu->run->s.regs.acrs, 64); |
| 1457 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), |
| 1458 | &vcpu->arch.sie_block->gcr, 128); |
| 1459 | return rc ? -EFAULT : 0; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1460 | } |
| 1461 | |
Thomas Huth | e879892 | 2013-11-06 15:46:33 +0100 | [diff] [blame] | 1462 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
| 1463 | { |
| 1464 | /* |
| 1465 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy |
| 1466 | * copying in vcpu load/put. Lets update our copies before we save |
| 1467 | * it into the save area |
| 1468 | */ |
| 1469 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
| 1470 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); |
| 1471 | save_access_regs(vcpu->run->s.regs.acrs); |
| 1472 | |
| 1473 | return kvm_s390_store_status_unloaded(vcpu, addr); |
| 1474 | } |
| 1475 | |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1476 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
| 1477 | { |
| 1478 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); |
| 1479 | kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu); |
| 1480 | exit_sie_sync(vcpu); |
| 1481 | } |
| 1482 | |
| 1483 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) |
| 1484 | { |
| 1485 | unsigned int i; |
| 1486 | struct kvm_vcpu *vcpu; |
| 1487 | |
| 1488 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 1489 | __disable_ibs_on_vcpu(vcpu); |
| 1490 | } |
| 1491 | } |
| 1492 | |
| 1493 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
| 1494 | { |
| 1495 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); |
| 1496 | kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu); |
| 1497 | exit_sie_sync(vcpu); |
| 1498 | } |
| 1499 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1500 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
| 1501 | { |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1502 | int i, online_vcpus, started_vcpus = 0; |
| 1503 | |
| 1504 | if (!is_vcpu_stopped(vcpu)) |
| 1505 | return; |
| 1506 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1507 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1508 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
David Hildenbrand | 433b9ee | 2014-05-06 16:11:14 +0200 | [diff] [blame] | 1509 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1510 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
| 1511 | |
| 1512 | for (i = 0; i < online_vcpus; i++) { |
| 1513 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) |
| 1514 | started_vcpus++; |
| 1515 | } |
| 1516 | |
| 1517 | if (started_vcpus == 0) { |
| 1518 | /* we're the only active VCPU -> speed it up */ |
| 1519 | __enable_ibs_on_vcpu(vcpu); |
| 1520 | } else if (started_vcpus == 1) { |
| 1521 | /* |
| 1522 | * As we are starting a second VCPU, we have to disable |
| 1523 | * the IBS facility on all VCPUs to remove potentially |
| 1524 | * oustanding ENABLE requests. |
| 1525 | */ |
| 1526 | __disable_ibs_on_all_vcpus(vcpu->kvm); |
| 1527 | } |
| 1528 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1529 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1530 | /* |
| 1531 | * Another VCPU might have used IBS while we were offline. |
| 1532 | * Let's play safe and flush the VCPU at startup. |
| 1533 | */ |
David Hildenbrand | d3d692c | 2014-07-29 08:53:36 +0200 | [diff] [blame] | 1534 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
David Hildenbrand | 433b9ee | 2014-05-06 16:11:14 +0200 | [diff] [blame] | 1535 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1536 | return; |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1537 | } |
| 1538 | |
| 1539 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) |
| 1540 | { |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1541 | int i, online_vcpus, started_vcpus = 0; |
| 1542 | struct kvm_vcpu *started_vcpu = NULL; |
| 1543 | |
| 1544 | if (is_vcpu_stopped(vcpu)) |
| 1545 | return; |
| 1546 | |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1547 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1548 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
David Hildenbrand | 433b9ee | 2014-05-06 16:11:14 +0200 | [diff] [blame] | 1549 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1550 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
| 1551 | |
David Hildenbrand | 32f5ff63 | 2014-04-14 12:40:03 +0200 | [diff] [blame] | 1552 | /* Need to lock access to action_bits to avoid a SIGP race condition */ |
David Hildenbrand | 4ae3c08 | 2014-05-16 10:23:53 +0200 | [diff] [blame] | 1553 | spin_lock(&vcpu->arch.local_int.lock); |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1554 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
David Hildenbrand | 32f5ff63 | 2014-04-14 12:40:03 +0200 | [diff] [blame] | 1555 | |
| 1556 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
| 1557 | vcpu->arch.local_int.action_bits &= |
| 1558 | ~(ACTION_STOP_ON_STOP | ACTION_STORE_ON_STOP); |
David Hildenbrand | 4ae3c08 | 2014-05-16 10:23:53 +0200 | [diff] [blame] | 1559 | spin_unlock(&vcpu->arch.local_int.lock); |
David Hildenbrand | 32f5ff63 | 2014-04-14 12:40:03 +0200 | [diff] [blame] | 1560 | |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1561 | __disable_ibs_on_vcpu(vcpu); |
| 1562 | |
| 1563 | for (i = 0; i < online_vcpus; i++) { |
| 1564 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { |
| 1565 | started_vcpus++; |
| 1566 | started_vcpu = vcpu->kvm->vcpus[i]; |
| 1567 | } |
| 1568 | } |
| 1569 | |
| 1570 | if (started_vcpus == 1) { |
| 1571 | /* |
| 1572 | * As we only have one VCPU left, we want to enable the |
| 1573 | * IBS facility for that VCPU to speed it up. |
| 1574 | */ |
| 1575 | __enable_ibs_on_vcpu(started_vcpu); |
| 1576 | } |
| 1577 | |
David Hildenbrand | 433b9ee | 2014-05-06 16:11:14 +0200 | [diff] [blame] | 1578 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
David Hildenbrand | 8ad3575 | 2014-03-14 11:00:21 +0100 | [diff] [blame] | 1579 | return; |
David Hildenbrand | 6852d7b | 2014-03-14 10:59:29 +0100 | [diff] [blame] | 1580 | } |
| 1581 | |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1582 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
| 1583 | struct kvm_enable_cap *cap) |
| 1584 | { |
| 1585 | int r; |
| 1586 | |
| 1587 | if (cap->flags) |
| 1588 | return -EINVAL; |
| 1589 | |
| 1590 | switch (cap->cap) { |
Cornelia Huck | fa6b7fe | 2012-12-20 15:32:12 +0100 | [diff] [blame] | 1591 | case KVM_CAP_S390_CSS_SUPPORT: |
| 1592 | if (!vcpu->kvm->arch.css_support) { |
| 1593 | vcpu->kvm->arch.css_support = 1; |
| 1594 | trace_kvm_s390_enable_css(vcpu->kvm); |
| 1595 | } |
| 1596 | r = 0; |
| 1597 | break; |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1598 | default: |
| 1599 | r = -EINVAL; |
| 1600 | break; |
| 1601 | } |
| 1602 | return r; |
| 1603 | } |
| 1604 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1605 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 1606 | unsigned int ioctl, unsigned long arg) |
| 1607 | { |
| 1608 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1609 | void __user *argp = (void __user *)arg; |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1610 | int idx; |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1611 | long r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1612 | |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1613 | switch (ioctl) { |
| 1614 | case KVM_S390_INTERRUPT: { |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1615 | struct kvm_s390_interrupt s390int; |
| 1616 | |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1617 | r = -EFAULT; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1618 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
Avi Kivity | 9373662 | 2010-05-13 12:35:17 +0300 | [diff] [blame] | 1619 | break; |
| 1620 | r = kvm_s390_inject_vcpu(vcpu, &s390int); |
| 1621 | break; |
Carsten Otte | ba5c1e9 | 2008-03-25 18:47:26 +0100 | [diff] [blame] | 1622 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1623 | case KVM_S390_STORE_STATUS: |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1624 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1625 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
Thomas Huth | 800c106 | 2013-09-12 10:33:45 +0200 | [diff] [blame] | 1626 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1627 | break; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1628 | case KVM_S390_SET_INITIAL_PSW: { |
| 1629 | psw_t psw; |
| 1630 | |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1631 | r = -EFAULT; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1632 | if (copy_from_user(&psw, argp, sizeof(psw))) |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1633 | break; |
| 1634 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); |
| 1635 | break; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1636 | } |
| 1637 | case KVM_S390_INITIAL_RESET: |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1638 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
| 1639 | break; |
Carsten Otte | 14eebd9 | 2012-05-15 14:15:26 +0200 | [diff] [blame] | 1640 | case KVM_SET_ONE_REG: |
| 1641 | case KVM_GET_ONE_REG: { |
| 1642 | struct kvm_one_reg reg; |
| 1643 | r = -EFAULT; |
| 1644 | if (copy_from_user(®, argp, sizeof(reg))) |
| 1645 | break; |
| 1646 | if (ioctl == KVM_SET_ONE_REG) |
| 1647 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); |
| 1648 | else |
| 1649 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); |
| 1650 | break; |
| 1651 | } |
Carsten Otte | 27e0393 | 2012-01-04 10:25:21 +0100 | [diff] [blame] | 1652 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 1653 | case KVM_S390_UCAS_MAP: { |
| 1654 | struct kvm_s390_ucas_mapping ucasmap; |
| 1655 | |
| 1656 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { |
| 1657 | r = -EFAULT; |
| 1658 | break; |
| 1659 | } |
| 1660 | |
| 1661 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 1662 | r = -EINVAL; |
| 1663 | break; |
| 1664 | } |
| 1665 | |
| 1666 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, |
| 1667 | ucasmap.vcpu_addr, ucasmap.length); |
| 1668 | break; |
| 1669 | } |
| 1670 | case KVM_S390_UCAS_UNMAP: { |
| 1671 | struct kvm_s390_ucas_mapping ucasmap; |
| 1672 | |
| 1673 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { |
| 1674 | r = -EFAULT; |
| 1675 | break; |
| 1676 | } |
| 1677 | |
| 1678 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
| 1679 | r = -EINVAL; |
| 1680 | break; |
| 1681 | } |
| 1682 | |
| 1683 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, |
| 1684 | ucasmap.length); |
| 1685 | break; |
| 1686 | } |
| 1687 | #endif |
Carsten Otte | ccc7910 | 2012-01-04 10:25:26 +0100 | [diff] [blame] | 1688 | case KVM_S390_VCPU_FAULT: { |
Martin Schwidefsky | 527e30b | 2014-04-30 16:04:25 +0200 | [diff] [blame] | 1689 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
Carsten Otte | ccc7910 | 2012-01-04 10:25:26 +0100 | [diff] [blame] | 1690 | break; |
| 1691 | } |
Cornelia Huck | d6712df | 2012-12-20 15:32:11 +0100 | [diff] [blame] | 1692 | case KVM_ENABLE_CAP: |
| 1693 | { |
| 1694 | struct kvm_enable_cap cap; |
| 1695 | r = -EFAULT; |
| 1696 | if (copy_from_user(&cap, argp, sizeof(cap))) |
| 1697 | break; |
| 1698 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); |
| 1699 | break; |
| 1700 | } |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1701 | default: |
Carsten Otte | 3e6afcf | 2012-01-04 10:25:30 +0100 | [diff] [blame] | 1702 | r = -ENOTTY; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1703 | } |
Avi Kivity | bc923cc | 2010-05-13 12:21:46 +0300 | [diff] [blame] | 1704 | return r; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1705 | } |
| 1706 | |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 1707 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
| 1708 | { |
| 1709 | #ifdef CONFIG_KVM_S390_UCONTROL |
| 1710 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) |
| 1711 | && (kvm_is_ucontrol(vcpu->kvm))) { |
| 1712 | vmf->page = virt_to_page(vcpu->arch.sie_block); |
| 1713 | get_page(vmf->page); |
| 1714 | return 0; |
| 1715 | } |
| 1716 | #endif |
| 1717 | return VM_FAULT_SIGBUS; |
| 1718 | } |
| 1719 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 1720 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
| 1721 | unsigned long npages) |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 1722 | { |
| 1723 | return 0; |
| 1724 | } |
| 1725 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1726 | /* Section: memory related */ |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1727 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
| 1728 | struct kvm_memory_slot *memslot, |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 1729 | struct kvm_userspace_memory_region *mem, |
| 1730 | enum kvm_mr_change change) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1731 | { |
Nick Wang | dd2887e | 2013-03-25 17:22:57 +0100 | [diff] [blame] | 1732 | /* A few sanity checks. We can have memory slots which have to be |
| 1733 | located/ended at a segment boundary (1MB). The memory in userland is |
| 1734 | ok to be fragmented into various different vmas. It is okay to mmap() |
| 1735 | 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] | 1736 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1737 | if (mem->userspace_addr & 0xffffful) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1738 | return -EINVAL; |
| 1739 | |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1740 | if (mem->memory_size & 0xffffful) |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1741 | return -EINVAL; |
| 1742 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1743 | return 0; |
| 1744 | } |
| 1745 | |
| 1746 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
| 1747 | struct kvm_userspace_memory_region *mem, |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 1748 | const struct kvm_memory_slot *old, |
| 1749 | enum kvm_mr_change change) |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1750 | { |
Carsten Otte | f7850c9 | 2011-07-24 10:48:23 +0200 | [diff] [blame] | 1751 | int rc; |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 1752 | |
Christian Borntraeger | 2cef4de | 2013-03-25 17:22:48 +0100 | [diff] [blame] | 1753 | /* If the basics of the memslot do not change, we do not want |
| 1754 | * to update the gmap. Every update causes several unnecessary |
| 1755 | * segment translation exceptions. This is usually handled just |
| 1756 | * fine by the normal fault handler + gmap, but it will also |
| 1757 | * cause faults on the prefix page of running guest CPUs. |
| 1758 | */ |
| 1759 | if (old->userspace_addr == mem->userspace_addr && |
| 1760 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && |
| 1761 | old->npages * PAGE_SIZE == mem->memory_size) |
| 1762 | return; |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1763 | |
| 1764 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, |
| 1765 | mem->guest_phys_addr, mem->memory_size); |
| 1766 | if (rc) |
Carsten Otte | f7850c9 | 2011-07-24 10:48:23 +0200 | [diff] [blame] | 1767 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
Carsten Otte | 598841c | 2011-07-24 10:48:21 +0200 | [diff] [blame] | 1768 | return; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1769 | } |
| 1770 | |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1771 | static int __init kvm_s390_init(void) |
| 1772 | { |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1773 | int ret; |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 1774 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1775 | if (ret) |
| 1776 | return ret; |
| 1777 | |
| 1778 | /* |
| 1779 | * 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] | 1780 | * to hold the maximum amount of facilities. On the other hand, we |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1781 | * only set facilities that are known to work in KVM. |
| 1782 | */ |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1783 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
| 1784 | if (!vfacilities) { |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1785 | kvm_exit(); |
| 1786 | return -ENOMEM; |
| 1787 | } |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1788 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
Christian Borntraeger | 7be81a4 | 2014-09-19 15:55:20 +0200 | [diff] [blame^] | 1789 | vfacilities[0] &= 0xff82fffbf47c2000UL; |
Michael Mueller | 7feb6bb | 2013-06-28 13:30:24 +0200 | [diff] [blame] | 1790 | vfacilities[1] &= 0x005c000000000000UL; |
Christian Borntraeger | ef50f7a | 2009-06-23 17:24:07 +0200 | [diff] [blame] | 1791 | return 0; |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1792 | } |
| 1793 | |
| 1794 | static void __exit kvm_s390_exit(void) |
| 1795 | { |
Michael Mueller | 78c4b59 | 2013-07-26 15:04:04 +0200 | [diff] [blame] | 1796 | free_page((unsigned long) vfacilities); |
Heiko Carstens | b0c632d | 2008-03-25 18:47:20 +0100 | [diff] [blame] | 1797 | kvm_exit(); |
| 1798 | } |
| 1799 | |
| 1800 | module_init(kvm_s390_init); |
| 1801 | module_exit(kvm_s390_exit); |
Cornelia Huck | 566af94 | 2013-05-27 18:42:33 +0200 | [diff] [blame] | 1802 | |
| 1803 | /* |
| 1804 | * Enable autoloading of the kvm module. |
| 1805 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c |
| 1806 | * since x86 takes a different approach. |
| 1807 | */ |
| 1808 | #include <linux/miscdevice.h> |
| 1809 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
| 1810 | MODULE_ALIAS("devname:kvm"); |