Commit | Line | Data |
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b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2009 |
b0c632db HC |
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> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
15f36ebd | 14 | * Jason J. Herne <jjherne@us.ibm.com> |
b0c632db HC |
15 | */ |
16 | ||
17 | #include <linux/compiler.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/fs.h> | |
ca872302 | 20 | #include <linux/hrtimer.h> |
b0c632db HC |
21 | #include <linux/init.h> |
22 | #include <linux/kvm.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/module.h> | |
a374e892 | 25 | #include <linux/random.h> |
b0c632db | 26 | #include <linux/slab.h> |
ba5c1e9b | 27 | #include <linux/timer.h> |
41408c28 | 28 | #include <linux/vmalloc.h> |
cbb870c8 | 29 | #include <asm/asm-offsets.h> |
b0c632db | 30 | #include <asm/lowcore.h> |
fdf03650 | 31 | #include <asm/etr.h> |
b0c632db | 32 | #include <asm/pgtable.h> |
1e133ab2 | 33 | #include <asm/gmap.h> |
f5daba1d | 34 | #include <asm/nmi.h> |
a0616cde | 35 | #include <asm/switch_to.h> |
6d3da241 | 36 | #include <asm/isc.h> |
1526bf9c | 37 | #include <asm/sclp.h> |
8f2abe6a | 38 | #include "kvm-s390.h" |
b0c632db HC |
39 | #include "gaccess.h" |
40 | ||
ea2cdd27 DH |
41 | #define KMSG_COMPONENT "kvm-s390" |
42 | #undef pr_fmt | |
43 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
44 | ||
5786fffa CH |
45 | #define CREATE_TRACE_POINTS |
46 | #include "trace.h" | |
ade38c31 | 47 | #include "trace-s390.h" |
5786fffa | 48 | |
41408c28 | 49 | #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
816c7667 JF |
50 | #define LOCAL_IRQS 32 |
51 | #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ | |
52 | (KVM_MAX_VCPUS + LOCAL_IRQS)) | |
41408c28 | 53 | |
b0c632db HC |
54 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
55 | ||
56 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
57 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 58 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
59 | { "exit_validity", VCPU_STAT(exit_validity) }, |
60 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
61 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
62 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
63 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
64 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
65 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f7819512 | 66 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 67 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 68 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ce2e4f0b | 69 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 70 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 71 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
72 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
73 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 74 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 75 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
76 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
77 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
78 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
79 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
80 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
81 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
82 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 83 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
84 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
85 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
86 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
87 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
88 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 89 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
90 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
91 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 92 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
93 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
94 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 95 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 96 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 97 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 98 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 99 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
100 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
101 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 102 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
103 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
104 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 105 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
106 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
107 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
108 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
109 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
110 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
111 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 112 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 113 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 114 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
175a5c9e CB |
115 | { "diagnose_258", VCPU_STAT(diagnose_258) }, |
116 | { "diagnose_308", VCPU_STAT(diagnose_308) }, | |
117 | { "diagnose_500", VCPU_STAT(diagnose_500) }, | |
b0c632db HC |
118 | { NULL } |
119 | }; | |
120 | ||
9d8d5786 | 121 | /* upper facilities limit for kvm */ |
60a37709 AY |
122 | unsigned long kvm_s390_fac_list_mask[16] = { |
123 | 0xffe6000000000000UL, | |
124 | 0x005e000000000000UL, | |
9d8d5786 | 125 | }; |
b0c632db | 126 | |
9d8d5786 | 127 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 128 | { |
9d8d5786 MM |
129 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
130 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
131 | } |
132 | ||
9d8d5786 | 133 | static struct gmap_notifier gmap_notifier; |
78f26131 | 134 | debug_info_t *kvm_s390_dbf; |
9d8d5786 | 135 | |
b0c632db | 136 | /* Section: not file related */ |
13a34e06 | 137 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
138 | { |
139 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 140 | return 0; |
b0c632db HC |
141 | } |
142 | ||
2c70fe44 CB |
143 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
144 | ||
fdf03650 FZ |
145 | /* |
146 | * This callback is executed during stop_machine(). All CPUs are therefore | |
147 | * temporarily stopped. In order not to change guest behavior, we have to | |
148 | * disable preemption whenever we touch the epoch of kvm and the VCPUs, | |
149 | * so a CPU won't be stopped while calculating with the epoch. | |
150 | */ | |
151 | static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, | |
152 | void *v) | |
153 | { | |
154 | struct kvm *kvm; | |
155 | struct kvm_vcpu *vcpu; | |
156 | int i; | |
157 | unsigned long long *delta = v; | |
158 | ||
159 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
160 | kvm->arch.epoch -= *delta; | |
161 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
162 | vcpu->arch.sie_block->epoch -= *delta; | |
db0758b2 DH |
163 | if (vcpu->arch.cputm_enabled) |
164 | vcpu->arch.cputm_start += *delta; | |
fdf03650 FZ |
165 | } |
166 | } | |
167 | return NOTIFY_OK; | |
168 | } | |
169 | ||
170 | static struct notifier_block kvm_clock_notifier = { | |
171 | .notifier_call = kvm_clock_sync, | |
172 | }; | |
173 | ||
b0c632db HC |
174 | int kvm_arch_hardware_setup(void) |
175 | { | |
2c70fe44 CB |
176 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
177 | gmap_register_ipte_notifier(&gmap_notifier); | |
fdf03650 FZ |
178 | atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
179 | &kvm_clock_notifier); | |
b0c632db HC |
180 | return 0; |
181 | } | |
182 | ||
183 | void kvm_arch_hardware_unsetup(void) | |
184 | { | |
2c70fe44 | 185 | gmap_unregister_ipte_notifier(&gmap_notifier); |
fdf03650 FZ |
186 | atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
187 | &kvm_clock_notifier); | |
b0c632db HC |
188 | } |
189 | ||
b0c632db HC |
190 | int kvm_arch_init(void *opaque) |
191 | { | |
78f26131 CB |
192 | kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
193 | if (!kvm_s390_dbf) | |
194 | return -ENOMEM; | |
195 | ||
196 | if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) { | |
197 | debug_unregister(kvm_s390_dbf); | |
198 | return -ENOMEM; | |
199 | } | |
200 | ||
84877d93 CH |
201 | /* Register floating interrupt controller interface. */ |
202 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
203 | } |
204 | ||
78f26131 CB |
205 | void kvm_arch_exit(void) |
206 | { | |
207 | debug_unregister(kvm_s390_dbf); | |
208 | } | |
209 | ||
b0c632db HC |
210 | /* Section: device related */ |
211 | long kvm_arch_dev_ioctl(struct file *filp, | |
212 | unsigned int ioctl, unsigned long arg) | |
213 | { | |
214 | if (ioctl == KVM_S390_ENABLE_SIE) | |
215 | return s390_enable_sie(); | |
216 | return -EINVAL; | |
217 | } | |
218 | ||
784aa3d7 | 219 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 220 | { |
d7b0b5eb CO |
221 | int r; |
222 | ||
2bd0ac4e | 223 | switch (ext) { |
d7b0b5eb | 224 | case KVM_CAP_S390_PSW: |
b6cf8788 | 225 | case KVM_CAP_S390_GMAP: |
52e16b18 | 226 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
227 | #ifdef CONFIG_KVM_S390_UCONTROL |
228 | case KVM_CAP_S390_UCONTROL: | |
229 | #endif | |
3c038e6b | 230 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 231 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 232 | case KVM_CAP_ONE_REG: |
d6712df9 | 233 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 234 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 235 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 236 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 237 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 238 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 239 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 240 | case KVM_CAP_MP_STATE: |
47b43c52 | 241 | case KVM_CAP_S390_INJECT_IRQ: |
2444b352 | 242 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 243 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 244 | case KVM_CAP_S390_SKEYS: |
816c7667 | 245 | case KVM_CAP_S390_IRQ_STATE: |
d7b0b5eb CO |
246 | r = 1; |
247 | break; | |
41408c28 TH |
248 | case KVM_CAP_S390_MEM_OP: |
249 | r = MEM_OP_MAX_SIZE; | |
250 | break; | |
e726b1bd CB |
251 | case KVM_CAP_NR_VCPUS: |
252 | case KVM_CAP_MAX_VCPUS: | |
fe0edcb7 ED |
253 | r = sclp.has_esca ? KVM_S390_ESCA_CPU_SLOTS |
254 | : KVM_S390_BSCA_CPU_SLOTS; | |
e726b1bd | 255 | break; |
e1e2e605 NW |
256 | case KVM_CAP_NR_MEMSLOTS: |
257 | r = KVM_USER_MEM_SLOTS; | |
258 | break; | |
1526bf9c | 259 | case KVM_CAP_S390_COW: |
abf09bed | 260 | r = MACHINE_HAS_ESOP; |
1526bf9c | 261 | break; |
68c55750 EF |
262 | case KVM_CAP_S390_VECTOR_REGISTERS: |
263 | r = MACHINE_HAS_VX; | |
264 | break; | |
c6e5f166 FZ |
265 | case KVM_CAP_S390_RI: |
266 | r = test_facility(64); | |
267 | break; | |
2bd0ac4e | 268 | default: |
d7b0b5eb | 269 | r = 0; |
2bd0ac4e | 270 | } |
d7b0b5eb | 271 | return r; |
b0c632db HC |
272 | } |
273 | ||
15f36ebd JH |
274 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
275 | struct kvm_memory_slot *memslot) | |
276 | { | |
277 | gfn_t cur_gfn, last_gfn; | |
278 | unsigned long address; | |
279 | struct gmap *gmap = kvm->arch.gmap; | |
280 | ||
15f36ebd JH |
281 | /* Loop over all guest pages */ |
282 | last_gfn = memslot->base_gfn + memslot->npages; | |
283 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
284 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
285 | ||
1e133ab2 | 286 | if (test_and_clear_guest_dirty(gmap->mm, address)) |
15f36ebd | 287 | mark_page_dirty(kvm, cur_gfn); |
1763f8d0 CB |
288 | if (fatal_signal_pending(current)) |
289 | return; | |
70c88a00 | 290 | cond_resched(); |
15f36ebd | 291 | } |
15f36ebd JH |
292 | } |
293 | ||
b0c632db | 294 | /* Section: vm related */ |
a6e2f683 ED |
295 | static void sca_del_vcpu(struct kvm_vcpu *vcpu); |
296 | ||
b0c632db HC |
297 | /* |
298 | * Get (and clear) the dirty memory log for a memory slot. | |
299 | */ | |
300 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
301 | struct kvm_dirty_log *log) | |
302 | { | |
15f36ebd JH |
303 | int r; |
304 | unsigned long n; | |
9f6b8029 | 305 | struct kvm_memslots *slots; |
15f36ebd JH |
306 | struct kvm_memory_slot *memslot; |
307 | int is_dirty = 0; | |
308 | ||
309 | mutex_lock(&kvm->slots_lock); | |
310 | ||
311 | r = -EINVAL; | |
312 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
313 | goto out; | |
314 | ||
9f6b8029 PB |
315 | slots = kvm_memslots(kvm); |
316 | memslot = id_to_memslot(slots, log->slot); | |
15f36ebd JH |
317 | r = -ENOENT; |
318 | if (!memslot->dirty_bitmap) | |
319 | goto out; | |
320 | ||
321 | kvm_s390_sync_dirty_log(kvm, memslot); | |
322 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
323 | if (r) | |
324 | goto out; | |
325 | ||
326 | /* Clear the dirty log */ | |
327 | if (is_dirty) { | |
328 | n = kvm_dirty_bitmap_bytes(memslot); | |
329 | memset(memslot->dirty_bitmap, 0, n); | |
330 | } | |
331 | r = 0; | |
332 | out: | |
333 | mutex_unlock(&kvm->slots_lock); | |
334 | return r; | |
b0c632db HC |
335 | } |
336 | ||
d938dc55 CH |
337 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
338 | { | |
339 | int r; | |
340 | ||
341 | if (cap->flags) | |
342 | return -EINVAL; | |
343 | ||
344 | switch (cap->cap) { | |
84223598 | 345 | case KVM_CAP_S390_IRQCHIP: |
c92ea7b9 | 346 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
84223598 CH |
347 | kvm->arch.use_irqchip = 1; |
348 | r = 0; | |
349 | break; | |
2444b352 | 350 | case KVM_CAP_S390_USER_SIGP: |
c92ea7b9 | 351 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
2444b352 DH |
352 | kvm->arch.user_sigp = 1; |
353 | r = 0; | |
354 | break; | |
68c55750 | 355 | case KVM_CAP_S390_VECTOR_REGISTERS: |
5967c17b DH |
356 | mutex_lock(&kvm->lock); |
357 | if (atomic_read(&kvm->online_vcpus)) { | |
358 | r = -EBUSY; | |
359 | } else if (MACHINE_HAS_VX) { | |
c54f0d6a DH |
360 | set_kvm_facility(kvm->arch.model.fac_mask, 129); |
361 | set_kvm_facility(kvm->arch.model.fac_list, 129); | |
18280d8b MM |
362 | r = 0; |
363 | } else | |
364 | r = -EINVAL; | |
5967c17b | 365 | mutex_unlock(&kvm->lock); |
c92ea7b9 CB |
366 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
367 | r ? "(not available)" : "(success)"); | |
68c55750 | 368 | break; |
c6e5f166 FZ |
369 | case KVM_CAP_S390_RI: |
370 | r = -EINVAL; | |
371 | mutex_lock(&kvm->lock); | |
372 | if (atomic_read(&kvm->online_vcpus)) { | |
373 | r = -EBUSY; | |
374 | } else if (test_facility(64)) { | |
c54f0d6a DH |
375 | set_kvm_facility(kvm->arch.model.fac_mask, 64); |
376 | set_kvm_facility(kvm->arch.model.fac_list, 64); | |
c6e5f166 FZ |
377 | r = 0; |
378 | } | |
379 | mutex_unlock(&kvm->lock); | |
380 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s", | |
381 | r ? "(not available)" : "(success)"); | |
382 | break; | |
e44fc8c9 | 383 | case KVM_CAP_S390_USER_STSI: |
c92ea7b9 | 384 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
e44fc8c9 ET |
385 | kvm->arch.user_stsi = 1; |
386 | r = 0; | |
387 | break; | |
d938dc55 CH |
388 | default: |
389 | r = -EINVAL; | |
390 | break; | |
391 | } | |
392 | return r; | |
393 | } | |
394 | ||
8c0a7ce6 DD |
395 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
396 | { | |
397 | int ret; | |
398 | ||
399 | switch (attr->attr) { | |
400 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
401 | ret = 0; | |
c92ea7b9 | 402 | VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
a3a92c31 DD |
403 | kvm->arch.mem_limit); |
404 | if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr)) | |
8c0a7ce6 DD |
405 | ret = -EFAULT; |
406 | break; | |
407 | default: | |
408 | ret = -ENXIO; | |
409 | break; | |
410 | } | |
411 | return ret; | |
412 | } | |
413 | ||
414 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
415 | { |
416 | int ret; | |
417 | unsigned int idx; | |
418 | switch (attr->attr) { | |
419 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
e6db1d61 DD |
420 | /* enable CMMA only for z10 and later (EDAT_1) */ |
421 | ret = -EINVAL; | |
422 | if (!MACHINE_IS_LPAR || !MACHINE_HAS_EDAT1) | |
423 | break; | |
424 | ||
4f718eab | 425 | ret = -EBUSY; |
c92ea7b9 | 426 | VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
4f718eab DD |
427 | mutex_lock(&kvm->lock); |
428 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
429 | kvm->arch.use_cmma = 1; | |
430 | ret = 0; | |
431 | } | |
432 | mutex_unlock(&kvm->lock); | |
433 | break; | |
434 | case KVM_S390_VM_MEM_CLR_CMMA: | |
c3489155 DD |
435 | ret = -EINVAL; |
436 | if (!kvm->arch.use_cmma) | |
437 | break; | |
438 | ||
c92ea7b9 | 439 | VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
4f718eab DD |
440 | mutex_lock(&kvm->lock); |
441 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 442 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
443 | srcu_read_unlock(&kvm->srcu, idx); |
444 | mutex_unlock(&kvm->lock); | |
445 | ret = 0; | |
446 | break; | |
8c0a7ce6 DD |
447 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
448 | unsigned long new_limit; | |
449 | ||
450 | if (kvm_is_ucontrol(kvm)) | |
451 | return -EINVAL; | |
452 | ||
453 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
454 | return -EFAULT; | |
455 | ||
a3a92c31 DD |
456 | if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT && |
457 | new_limit > kvm->arch.mem_limit) | |
8c0a7ce6 DD |
458 | return -E2BIG; |
459 | ||
a3a92c31 DD |
460 | if (!new_limit) |
461 | return -EINVAL; | |
462 | ||
463 | /* gmap_alloc takes last usable address */ | |
464 | if (new_limit != KVM_S390_NO_MEM_LIMIT) | |
465 | new_limit -= 1; | |
466 | ||
8c0a7ce6 DD |
467 | ret = -EBUSY; |
468 | mutex_lock(&kvm->lock); | |
469 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
470 | /* gmap_alloc will round the limit up */ | |
471 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
472 | ||
473 | if (!new) { | |
474 | ret = -ENOMEM; | |
475 | } else { | |
476 | gmap_free(kvm->arch.gmap); | |
477 | new->private = kvm; | |
478 | kvm->arch.gmap = new; | |
479 | ret = 0; | |
480 | } | |
481 | } | |
482 | mutex_unlock(&kvm->lock); | |
a3a92c31 DD |
483 | VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit); |
484 | VM_EVENT(kvm, 3, "New guest asce: 0x%pK", | |
485 | (void *) kvm->arch.gmap->asce); | |
8c0a7ce6 DD |
486 | break; |
487 | } | |
4f718eab DD |
488 | default: |
489 | ret = -ENXIO; | |
490 | break; | |
491 | } | |
492 | return ret; | |
493 | } | |
494 | ||
a374e892 TK |
495 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
496 | ||
497 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
498 | { | |
499 | struct kvm_vcpu *vcpu; | |
500 | int i; | |
501 | ||
9d8d5786 | 502 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
503 | return -EINVAL; |
504 | ||
505 | mutex_lock(&kvm->lock); | |
506 | switch (attr->attr) { | |
507 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
508 | get_random_bytes( | |
509 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
510 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
511 | kvm->arch.crypto.aes_kw = 1; | |
c92ea7b9 | 512 | VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
a374e892 TK |
513 | break; |
514 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
515 | get_random_bytes( | |
516 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
517 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
518 | kvm->arch.crypto.dea_kw = 1; | |
c92ea7b9 | 519 | VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
a374e892 TK |
520 | break; |
521 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
522 | kvm->arch.crypto.aes_kw = 0; | |
523 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
524 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
c92ea7b9 | 525 | VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
a374e892 TK |
526 | break; |
527 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
528 | kvm->arch.crypto.dea_kw = 0; | |
529 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
530 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
c92ea7b9 | 531 | VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
a374e892 TK |
532 | break; |
533 | default: | |
534 | mutex_unlock(&kvm->lock); | |
535 | return -ENXIO; | |
536 | } | |
537 | ||
538 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
539 | kvm_s390_vcpu_crypto_setup(vcpu); | |
540 | exit_sie(vcpu); | |
541 | } | |
542 | mutex_unlock(&kvm->lock); | |
543 | return 0; | |
544 | } | |
545 | ||
72f25020 JH |
546 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
547 | { | |
548 | u8 gtod_high; | |
549 | ||
550 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
551 | sizeof(gtod_high))) | |
552 | return -EFAULT; | |
553 | ||
554 | if (gtod_high != 0) | |
555 | return -EINVAL; | |
58c383c6 | 556 | VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
557 | |
558 | return 0; | |
559 | } | |
560 | ||
561 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
562 | { | |
5a3d883a | 563 | u64 gtod; |
72f25020 JH |
564 | |
565 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
566 | return -EFAULT; | |
567 | ||
25ed1675 | 568 | kvm_s390_set_tod_clock(kvm, gtod); |
58c383c6 | 569 | VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod); |
72f25020 JH |
570 | return 0; |
571 | } | |
572 | ||
573 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
574 | { | |
575 | int ret; | |
576 | ||
577 | if (attr->flags) | |
578 | return -EINVAL; | |
579 | ||
580 | switch (attr->attr) { | |
581 | case KVM_S390_VM_TOD_HIGH: | |
582 | ret = kvm_s390_set_tod_high(kvm, attr); | |
583 | break; | |
584 | case KVM_S390_VM_TOD_LOW: | |
585 | ret = kvm_s390_set_tod_low(kvm, attr); | |
586 | break; | |
587 | default: | |
588 | ret = -ENXIO; | |
589 | break; | |
590 | } | |
591 | return ret; | |
592 | } | |
593 | ||
594 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
595 | { | |
596 | u8 gtod_high = 0; | |
597 | ||
598 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
599 | sizeof(gtod_high))) | |
600 | return -EFAULT; | |
58c383c6 | 601 | VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
602 | |
603 | return 0; | |
604 | } | |
605 | ||
606 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
607 | { | |
5a3d883a | 608 | u64 gtod; |
72f25020 | 609 | |
60417fcc | 610 | gtod = kvm_s390_get_tod_clock_fast(kvm); |
72f25020 JH |
611 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
612 | return -EFAULT; | |
58c383c6 | 613 | VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
72f25020 JH |
614 | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
619 | { | |
620 | int ret; | |
621 | ||
622 | if (attr->flags) | |
623 | return -EINVAL; | |
624 | ||
625 | switch (attr->attr) { | |
626 | case KVM_S390_VM_TOD_HIGH: | |
627 | ret = kvm_s390_get_tod_high(kvm, attr); | |
628 | break; | |
629 | case KVM_S390_VM_TOD_LOW: | |
630 | ret = kvm_s390_get_tod_low(kvm, attr); | |
631 | break; | |
632 | default: | |
633 | ret = -ENXIO; | |
634 | break; | |
635 | } | |
636 | return ret; | |
637 | } | |
638 | ||
658b6eda MM |
639 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
640 | { | |
641 | struct kvm_s390_vm_cpu_processor *proc; | |
053dd230 | 642 | u16 lowest_ibc, unblocked_ibc; |
658b6eda MM |
643 | int ret = 0; |
644 | ||
645 | mutex_lock(&kvm->lock); | |
646 | if (atomic_read(&kvm->online_vcpus)) { | |
647 | ret = -EBUSY; | |
648 | goto out; | |
649 | } | |
650 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
651 | if (!proc) { | |
652 | ret = -ENOMEM; | |
653 | goto out; | |
654 | } | |
655 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
656 | sizeof(*proc))) { | |
9bb0ec09 | 657 | kvm->arch.model.cpuid = proc->cpuid; |
053dd230 DH |
658 | lowest_ibc = sclp.ibc >> 16 & 0xfff; |
659 | unblocked_ibc = sclp.ibc & 0xfff; | |
660 | if (lowest_ibc) { | |
661 | if (proc->ibc > unblocked_ibc) | |
662 | kvm->arch.model.ibc = unblocked_ibc; | |
663 | else if (proc->ibc < lowest_ibc) | |
664 | kvm->arch.model.ibc = lowest_ibc; | |
665 | else | |
666 | kvm->arch.model.ibc = proc->ibc; | |
667 | } | |
c54f0d6a | 668 | memcpy(kvm->arch.model.fac_list, proc->fac_list, |
658b6eda MM |
669 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
670 | } else | |
671 | ret = -EFAULT; | |
672 | kfree(proc); | |
673 | out: | |
674 | mutex_unlock(&kvm->lock); | |
675 | return ret; | |
676 | } | |
677 | ||
678 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
679 | { | |
680 | int ret = -ENXIO; | |
681 | ||
682 | switch (attr->attr) { | |
683 | case KVM_S390_VM_CPU_PROCESSOR: | |
684 | ret = kvm_s390_set_processor(kvm, attr); | |
685 | break; | |
686 | } | |
687 | return ret; | |
688 | } | |
689 | ||
690 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
691 | { | |
692 | struct kvm_s390_vm_cpu_processor *proc; | |
693 | int ret = 0; | |
694 | ||
695 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
696 | if (!proc) { | |
697 | ret = -ENOMEM; | |
698 | goto out; | |
699 | } | |
9bb0ec09 | 700 | proc->cpuid = kvm->arch.model.cpuid; |
658b6eda | 701 | proc->ibc = kvm->arch.model.ibc; |
c54f0d6a DH |
702 | memcpy(&proc->fac_list, kvm->arch.model.fac_list, |
703 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda MM |
704 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
705 | ret = -EFAULT; | |
706 | kfree(proc); | |
707 | out: | |
708 | return ret; | |
709 | } | |
710 | ||
711 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
712 | { | |
713 | struct kvm_s390_vm_cpu_machine *mach; | |
714 | int ret = 0; | |
715 | ||
716 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
717 | if (!mach) { | |
718 | ret = -ENOMEM; | |
719 | goto out; | |
720 | } | |
721 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 722 | mach->ibc = sclp.ibc; |
c54f0d6a | 723 | memcpy(&mach->fac_mask, kvm->arch.model.fac_mask, |
981467c9 | 724 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda | 725 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 726 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
727 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
728 | ret = -EFAULT; | |
729 | kfree(mach); | |
730 | out: | |
731 | return ret; | |
732 | } | |
733 | ||
734 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
735 | { | |
736 | int ret = -ENXIO; | |
737 | ||
738 | switch (attr->attr) { | |
739 | case KVM_S390_VM_CPU_PROCESSOR: | |
740 | ret = kvm_s390_get_processor(kvm, attr); | |
741 | break; | |
742 | case KVM_S390_VM_CPU_MACHINE: | |
743 | ret = kvm_s390_get_machine(kvm, attr); | |
744 | break; | |
745 | } | |
746 | return ret; | |
747 | } | |
748 | ||
f2061656 DD |
749 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
750 | { | |
751 | int ret; | |
752 | ||
753 | switch (attr->group) { | |
4f718eab | 754 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 755 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 756 | break; |
72f25020 JH |
757 | case KVM_S390_VM_TOD: |
758 | ret = kvm_s390_set_tod(kvm, attr); | |
759 | break; | |
658b6eda MM |
760 | case KVM_S390_VM_CPU_MODEL: |
761 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
762 | break; | |
a374e892 TK |
763 | case KVM_S390_VM_CRYPTO: |
764 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
765 | break; | |
f2061656 DD |
766 | default: |
767 | ret = -ENXIO; | |
768 | break; | |
769 | } | |
770 | ||
771 | return ret; | |
772 | } | |
773 | ||
774 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
775 | { | |
8c0a7ce6 DD |
776 | int ret; |
777 | ||
778 | switch (attr->group) { | |
779 | case KVM_S390_VM_MEM_CTRL: | |
780 | ret = kvm_s390_get_mem_control(kvm, attr); | |
781 | break; | |
72f25020 JH |
782 | case KVM_S390_VM_TOD: |
783 | ret = kvm_s390_get_tod(kvm, attr); | |
784 | break; | |
658b6eda MM |
785 | case KVM_S390_VM_CPU_MODEL: |
786 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
787 | break; | |
8c0a7ce6 DD |
788 | default: |
789 | ret = -ENXIO; | |
790 | break; | |
791 | } | |
792 | ||
793 | return ret; | |
f2061656 DD |
794 | } |
795 | ||
796 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
797 | { | |
798 | int ret; | |
799 | ||
800 | switch (attr->group) { | |
4f718eab DD |
801 | case KVM_S390_VM_MEM_CTRL: |
802 | switch (attr->attr) { | |
803 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
804 | case KVM_S390_VM_MEM_CLR_CMMA: | |
8c0a7ce6 | 805 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
806 | ret = 0; |
807 | break; | |
808 | default: | |
809 | ret = -ENXIO; | |
810 | break; | |
811 | } | |
812 | break; | |
72f25020 JH |
813 | case KVM_S390_VM_TOD: |
814 | switch (attr->attr) { | |
815 | case KVM_S390_VM_TOD_LOW: | |
816 | case KVM_S390_VM_TOD_HIGH: | |
817 | ret = 0; | |
818 | break; | |
819 | default: | |
820 | ret = -ENXIO; | |
821 | break; | |
822 | } | |
823 | break; | |
658b6eda MM |
824 | case KVM_S390_VM_CPU_MODEL: |
825 | switch (attr->attr) { | |
826 | case KVM_S390_VM_CPU_PROCESSOR: | |
827 | case KVM_S390_VM_CPU_MACHINE: | |
828 | ret = 0; | |
829 | break; | |
830 | default: | |
831 | ret = -ENXIO; | |
832 | break; | |
833 | } | |
834 | break; | |
a374e892 TK |
835 | case KVM_S390_VM_CRYPTO: |
836 | switch (attr->attr) { | |
837 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
838 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
839 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
840 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
841 | ret = 0; | |
842 | break; | |
843 | default: | |
844 | ret = -ENXIO; | |
845 | break; | |
846 | } | |
847 | break; | |
f2061656 DD |
848 | default: |
849 | ret = -ENXIO; | |
850 | break; | |
851 | } | |
852 | ||
853 | return ret; | |
854 | } | |
855 | ||
30ee2a98 JH |
856 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
857 | { | |
858 | uint8_t *keys; | |
859 | uint64_t hva; | |
860 | unsigned long curkey; | |
861 | int i, r = 0; | |
862 | ||
863 | if (args->flags != 0) | |
864 | return -EINVAL; | |
865 | ||
866 | /* Is this guest using storage keys? */ | |
867 | if (!mm_use_skey(current->mm)) | |
868 | return KVM_S390_GET_SKEYS_NONE; | |
869 | ||
870 | /* Enforce sane limit on memory allocation */ | |
871 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
872 | return -EINVAL; | |
873 | ||
874 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
875 | GFP_KERNEL | __GFP_NOWARN); | |
876 | if (!keys) | |
877 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
878 | if (!keys) | |
879 | return -ENOMEM; | |
880 | ||
881 | for (i = 0; i < args->count; i++) { | |
882 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
883 | if (kvm_is_error_hva(hva)) { | |
884 | r = -EFAULT; | |
885 | goto out; | |
886 | } | |
887 | ||
888 | curkey = get_guest_storage_key(current->mm, hva); | |
889 | if (IS_ERR_VALUE(curkey)) { | |
890 | r = curkey; | |
891 | goto out; | |
892 | } | |
893 | keys[i] = curkey; | |
894 | } | |
895 | ||
896 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
897 | sizeof(uint8_t) * args->count); | |
898 | if (r) | |
899 | r = -EFAULT; | |
900 | out: | |
901 | kvfree(keys); | |
902 | return r; | |
903 | } | |
904 | ||
905 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
906 | { | |
907 | uint8_t *keys; | |
908 | uint64_t hva; | |
909 | int i, r = 0; | |
910 | ||
911 | if (args->flags != 0) | |
912 | return -EINVAL; | |
913 | ||
914 | /* Enforce sane limit on memory allocation */ | |
915 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
916 | return -EINVAL; | |
917 | ||
918 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
919 | GFP_KERNEL | __GFP_NOWARN); | |
920 | if (!keys) | |
921 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
922 | if (!keys) | |
923 | return -ENOMEM; | |
924 | ||
925 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
926 | sizeof(uint8_t) * args->count); | |
927 | if (r) { | |
928 | r = -EFAULT; | |
929 | goto out; | |
930 | } | |
931 | ||
932 | /* Enable storage key handling for the guest */ | |
14d4a425 DD |
933 | r = s390_enable_skey(); |
934 | if (r) | |
935 | goto out; | |
30ee2a98 JH |
936 | |
937 | for (i = 0; i < args->count; i++) { | |
938 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
939 | if (kvm_is_error_hva(hva)) { | |
940 | r = -EFAULT; | |
941 | goto out; | |
942 | } | |
943 | ||
944 | /* Lowest order bit is reserved */ | |
945 | if (keys[i] & 0x01) { | |
946 | r = -EINVAL; | |
947 | goto out; | |
948 | } | |
949 | ||
950 | r = set_guest_storage_key(current->mm, hva, | |
951 | (unsigned long)keys[i], 0); | |
952 | if (r) | |
953 | goto out; | |
954 | } | |
955 | out: | |
956 | kvfree(keys); | |
957 | return r; | |
958 | } | |
959 | ||
b0c632db HC |
960 | long kvm_arch_vm_ioctl(struct file *filp, |
961 | unsigned int ioctl, unsigned long arg) | |
962 | { | |
963 | struct kvm *kvm = filp->private_data; | |
964 | void __user *argp = (void __user *)arg; | |
f2061656 | 965 | struct kvm_device_attr attr; |
b0c632db HC |
966 | int r; |
967 | ||
968 | switch (ioctl) { | |
ba5c1e9b CO |
969 | case KVM_S390_INTERRUPT: { |
970 | struct kvm_s390_interrupt s390int; | |
971 | ||
972 | r = -EFAULT; | |
973 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
974 | break; | |
975 | r = kvm_s390_inject_vm(kvm, &s390int); | |
976 | break; | |
977 | } | |
d938dc55 CH |
978 | case KVM_ENABLE_CAP: { |
979 | struct kvm_enable_cap cap; | |
980 | r = -EFAULT; | |
981 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
982 | break; | |
983 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
984 | break; | |
985 | } | |
84223598 CH |
986 | case KVM_CREATE_IRQCHIP: { |
987 | struct kvm_irq_routing_entry routing; | |
988 | ||
989 | r = -EINVAL; | |
990 | if (kvm->arch.use_irqchip) { | |
991 | /* Set up dummy routing. */ | |
992 | memset(&routing, 0, sizeof(routing)); | |
152b2839 | 993 | r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
84223598 CH |
994 | } |
995 | break; | |
996 | } | |
f2061656 DD |
997 | case KVM_SET_DEVICE_ATTR: { |
998 | r = -EFAULT; | |
999 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1000 | break; | |
1001 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
1002 | break; | |
1003 | } | |
1004 | case KVM_GET_DEVICE_ATTR: { | |
1005 | r = -EFAULT; | |
1006 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1007 | break; | |
1008 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
1009 | break; | |
1010 | } | |
1011 | case KVM_HAS_DEVICE_ATTR: { | |
1012 | r = -EFAULT; | |
1013 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1014 | break; | |
1015 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
1016 | break; | |
1017 | } | |
30ee2a98 JH |
1018 | case KVM_S390_GET_SKEYS: { |
1019 | struct kvm_s390_skeys args; | |
1020 | ||
1021 | r = -EFAULT; | |
1022 | if (copy_from_user(&args, argp, | |
1023 | sizeof(struct kvm_s390_skeys))) | |
1024 | break; | |
1025 | r = kvm_s390_get_skeys(kvm, &args); | |
1026 | break; | |
1027 | } | |
1028 | case KVM_S390_SET_SKEYS: { | |
1029 | struct kvm_s390_skeys args; | |
1030 | ||
1031 | r = -EFAULT; | |
1032 | if (copy_from_user(&args, argp, | |
1033 | sizeof(struct kvm_s390_skeys))) | |
1034 | break; | |
1035 | r = kvm_s390_set_skeys(kvm, &args); | |
1036 | break; | |
1037 | } | |
b0c632db | 1038 | default: |
367e1319 | 1039 | r = -ENOTTY; |
b0c632db HC |
1040 | } |
1041 | ||
1042 | return r; | |
1043 | } | |
1044 | ||
45c9b47c TK |
1045 | static int kvm_s390_query_ap_config(u8 *config) |
1046 | { | |
1047 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 1048 | u32 cc = 0; |
45c9b47c | 1049 | |
86044c8c | 1050 | memset(config, 0, 128); |
45c9b47c TK |
1051 | asm volatile( |
1052 | "lgr 0,%1\n" | |
1053 | "lgr 2,%2\n" | |
1054 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 1055 | "0: ipm %0\n" |
45c9b47c | 1056 | "srl %0,28\n" |
86044c8c CB |
1057 | "1:\n" |
1058 | EX_TABLE(0b, 1b) | |
1059 | : "+r" (cc) | |
45c9b47c TK |
1060 | : "r" (fcn_code), "r" (config) |
1061 | : "cc", "0", "2", "memory" | |
1062 | ); | |
1063 | ||
1064 | return cc; | |
1065 | } | |
1066 | ||
1067 | static int kvm_s390_apxa_installed(void) | |
1068 | { | |
1069 | u8 config[128]; | |
1070 | int cc; | |
1071 | ||
a6aacc3f | 1072 | if (test_facility(12)) { |
45c9b47c TK |
1073 | cc = kvm_s390_query_ap_config(config); |
1074 | ||
1075 | if (cc) | |
1076 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
1077 | else | |
1078 | return config[0] & 0x40; | |
1079 | } | |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
1085 | { | |
1086 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
1087 | ||
1088 | if (kvm_s390_apxa_installed()) | |
1089 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
1090 | else | |
1091 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
1092 | } | |
1093 | ||
9bb0ec09 | 1094 | static u64 kvm_s390_get_initial_cpuid(void) |
9d8d5786 | 1095 | { |
9bb0ec09 DH |
1096 | struct cpuid cpuid; |
1097 | ||
1098 | get_cpu_id(&cpuid); | |
1099 | cpuid.version = 0xff; | |
1100 | return *((u64 *) &cpuid); | |
9d8d5786 MM |
1101 | } |
1102 | ||
c54f0d6a | 1103 | static void kvm_s390_crypto_init(struct kvm *kvm) |
5102ee87 | 1104 | { |
9d8d5786 | 1105 | if (!test_kvm_facility(kvm, 76)) |
c54f0d6a | 1106 | return; |
5102ee87 | 1107 | |
c54f0d6a | 1108 | kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; |
45c9b47c | 1109 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1110 | |
ed6f76b4 TK |
1111 | /* Enable AES/DEA protected key functions by default */ |
1112 | kvm->arch.crypto.aes_kw = 1; | |
1113 | kvm->arch.crypto.dea_kw = 1; | |
1114 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1115 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1116 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1117 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
5102ee87 TK |
1118 | } |
1119 | ||
7d43bafc ED |
1120 | static void sca_dispose(struct kvm *kvm) |
1121 | { | |
1122 | if (kvm->arch.use_esca) | |
5e044315 | 1123 | free_pages_exact(kvm->arch.sca, sizeof(struct esca_block)); |
7d43bafc ED |
1124 | else |
1125 | free_page((unsigned long)(kvm->arch.sca)); | |
1126 | kvm->arch.sca = NULL; | |
1127 | } | |
1128 | ||
e08b9637 | 1129 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1130 | { |
9d8d5786 | 1131 | int i, rc; |
b0c632db | 1132 | char debug_name[16]; |
f6c137ff | 1133 | static unsigned long sca_offset; |
b0c632db | 1134 | |
e08b9637 CO |
1135 | rc = -EINVAL; |
1136 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1137 | if (type & ~KVM_VM_S390_UCONTROL) | |
1138 | goto out_err; | |
1139 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1140 | goto out_err; | |
1141 | #else | |
1142 | if (type) | |
1143 | goto out_err; | |
1144 | #endif | |
1145 | ||
b0c632db HC |
1146 | rc = s390_enable_sie(); |
1147 | if (rc) | |
d89f5eff | 1148 | goto out_err; |
b0c632db | 1149 | |
b290411a CO |
1150 | rc = -ENOMEM; |
1151 | ||
7d43bafc | 1152 | kvm->arch.use_esca = 0; /* start with basic SCA */ |
5e044315 | 1153 | rwlock_init(&kvm->arch.sca_lock); |
bc784cce | 1154 | kvm->arch.sca = (struct bsca_block *) get_zeroed_page(GFP_KERNEL); |
b0c632db | 1155 | if (!kvm->arch.sca) |
d89f5eff | 1156 | goto out_err; |
f6c137ff | 1157 | spin_lock(&kvm_lock); |
c5c2c393 | 1158 | sca_offset += 16; |
bc784cce | 1159 | if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE) |
c5c2c393 | 1160 | sca_offset = 0; |
bc784cce ED |
1161 | kvm->arch.sca = (struct bsca_block *) |
1162 | ((char *) kvm->arch.sca + sca_offset); | |
f6c137ff | 1163 | spin_unlock(&kvm_lock); |
b0c632db HC |
1164 | |
1165 | sprintf(debug_name, "kvm-%u", current->pid); | |
1166 | ||
1cb9cf72 | 1167 | kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
b0c632db | 1168 | if (!kvm->arch.dbf) |
40f5b735 | 1169 | goto out_err; |
b0c632db | 1170 | |
c54f0d6a DH |
1171 | kvm->arch.sie_page2 = |
1172 | (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1173 | if (!kvm->arch.sie_page2) | |
40f5b735 | 1174 | goto out_err; |
9d8d5786 | 1175 | |
fb5bf93f | 1176 | /* Populate the facility mask initially. */ |
c54f0d6a | 1177 | memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 1178 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
1179 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1180 | if (i < kvm_s390_fac_list_mask_size()) | |
c54f0d6a | 1181 | kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1182 | else |
c54f0d6a | 1183 | kvm->arch.model.fac_mask[i] = 0UL; |
9d8d5786 MM |
1184 | } |
1185 | ||
981467c9 | 1186 | /* Populate the facility list initially. */ |
c54f0d6a DH |
1187 | kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list; |
1188 | memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask, | |
981467c9 MM |
1189 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
1190 | ||
9bb0ec09 | 1191 | kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid(); |
37c5f6c8 | 1192 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1193 | |
c54f0d6a | 1194 | kvm_s390_crypto_init(kvm); |
5102ee87 | 1195 | |
ba5c1e9b | 1196 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1197 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1198 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1199 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1200 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1201 | |
b0c632db | 1202 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
78f26131 | 1203 | VM_EVENT(kvm, 3, "vm created with type %lu", type); |
b0c632db | 1204 | |
e08b9637 CO |
1205 | if (type & KVM_VM_S390_UCONTROL) { |
1206 | kvm->arch.gmap = NULL; | |
a3a92c31 | 1207 | kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT; |
e08b9637 | 1208 | } else { |
32e6b236 GH |
1209 | if (sclp.hamax == U64_MAX) |
1210 | kvm->arch.mem_limit = TASK_MAX_SIZE; | |
1211 | else | |
1212 | kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE, | |
1213 | sclp.hamax + 1); | |
a3a92c31 | 1214 | kvm->arch.gmap = gmap_alloc(current->mm, kvm->arch.mem_limit - 1); |
e08b9637 | 1215 | if (!kvm->arch.gmap) |
40f5b735 | 1216 | goto out_err; |
2c70fe44 | 1217 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1218 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1219 | } |
fa6b7fe9 CH |
1220 | |
1221 | kvm->arch.css_support = 0; | |
84223598 | 1222 | kvm->arch.use_irqchip = 0; |
72f25020 | 1223 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1224 | |
8ad35755 | 1225 | spin_lock_init(&kvm->arch.start_stop_lock); |
8335713a | 1226 | KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid); |
8ad35755 | 1227 | |
d89f5eff | 1228 | return 0; |
40f5b735 | 1229 | out_err: |
c54f0d6a | 1230 | free_page((unsigned long)kvm->arch.sie_page2); |
598841ca | 1231 | debug_unregister(kvm->arch.dbf); |
7d43bafc | 1232 | sca_dispose(kvm); |
78f26131 | 1233 | KVM_EVENT(3, "creation of vm failed: %d", rc); |
d89f5eff | 1234 | return rc; |
b0c632db HC |
1235 | } |
1236 | ||
d329c035 CB |
1237 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1238 | { | |
1239 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1240 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1241 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1242 | kvm_clear_async_pf_completion_queue(vcpu); |
bc784cce | 1243 | if (!kvm_is_ucontrol(vcpu->kvm)) |
a6e2f683 | 1244 | sca_del_vcpu(vcpu); |
27e0393f CO |
1245 | |
1246 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1247 | gmap_free(vcpu->arch.gmap); | |
1248 | ||
e6db1d61 | 1249 | if (vcpu->kvm->arch.use_cmma) |
b31605c1 | 1250 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
d329c035 | 1251 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1252 | |
6692cef3 | 1253 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1254 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1255 | } |
1256 | ||
1257 | static void kvm_free_vcpus(struct kvm *kvm) | |
1258 | { | |
1259 | unsigned int i; | |
988a2cae | 1260 | struct kvm_vcpu *vcpu; |
d329c035 | 1261 | |
988a2cae GN |
1262 | kvm_for_each_vcpu(i, vcpu, kvm) |
1263 | kvm_arch_vcpu_destroy(vcpu); | |
1264 | ||
1265 | mutex_lock(&kvm->lock); | |
1266 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1267 | kvm->vcpus[i] = NULL; | |
1268 | ||
1269 | atomic_set(&kvm->online_vcpus, 0); | |
1270 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1271 | } |
1272 | ||
b0c632db HC |
1273 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1274 | { | |
d329c035 | 1275 | kvm_free_vcpus(kvm); |
7d43bafc | 1276 | sca_dispose(kvm); |
d329c035 | 1277 | debug_unregister(kvm->arch.dbf); |
c54f0d6a | 1278 | free_page((unsigned long)kvm->arch.sie_page2); |
27e0393f CO |
1279 | if (!kvm_is_ucontrol(kvm)) |
1280 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 1281 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1282 | kvm_s390_clear_float_irqs(kvm); |
8335713a | 1283 | KVM_EVENT(3, "vm 0x%pK destroyed", kvm); |
b0c632db HC |
1284 | } |
1285 | ||
1286 | /* Section: vcpu related */ | |
dafd032a DD |
1287 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1288 | { | |
1289 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
1290 | if (!vcpu->arch.gmap) | |
1291 | return -ENOMEM; | |
1292 | vcpu->arch.gmap->private = vcpu->kvm; | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
a6e2f683 ED |
1297 | static void sca_del_vcpu(struct kvm_vcpu *vcpu) |
1298 | { | |
5e044315 | 1299 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
1300 | if (vcpu->kvm->arch.use_esca) { |
1301 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
a6e2f683 | 1302 | |
7d43bafc | 1303 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
10ce32d5 | 1304 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc ED |
1305 | } else { |
1306 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
1307 | ||
1308 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); | |
10ce32d5 | 1309 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc | 1310 | } |
5e044315 | 1311 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a6e2f683 ED |
1312 | } |
1313 | ||
eaa78f34 | 1314 | static void sca_add_vcpu(struct kvm_vcpu *vcpu) |
a6e2f683 | 1315 | { |
eaa78f34 DH |
1316 | read_lock(&vcpu->kvm->arch.sca_lock); |
1317 | if (vcpu->kvm->arch.use_esca) { | |
1318 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
7d43bafc | 1319 | |
eaa78f34 | 1320 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1321 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1322 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU; | |
25508824 | 1323 | vcpu->arch.sie_block->ecb2 |= 0x04U; |
eaa78f34 | 1324 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
7d43bafc | 1325 | } else { |
eaa78f34 | 1326 | struct bsca_block *sca = vcpu->kvm->arch.sca; |
a6e2f683 | 1327 | |
eaa78f34 | 1328 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1329 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1330 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
eaa78f34 | 1331 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); |
7d43bafc | 1332 | } |
eaa78f34 | 1333 | read_unlock(&vcpu->kvm->arch.sca_lock); |
5e044315 ED |
1334 | } |
1335 | ||
1336 | /* Basic SCA to Extended SCA data copy routines */ | |
1337 | static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s) | |
1338 | { | |
1339 | d->sda = s->sda; | |
1340 | d->sigp_ctrl.c = s->sigp_ctrl.c; | |
1341 | d->sigp_ctrl.scn = s->sigp_ctrl.scn; | |
1342 | } | |
1343 | ||
1344 | static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s) | |
1345 | { | |
1346 | int i; | |
1347 | ||
1348 | d->ipte_control = s->ipte_control; | |
1349 | d->mcn[0] = s->mcn; | |
1350 | for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++) | |
1351 | sca_copy_entry(&d->cpu[i], &s->cpu[i]); | |
1352 | } | |
1353 | ||
1354 | static int sca_switch_to_extended(struct kvm *kvm) | |
1355 | { | |
1356 | struct bsca_block *old_sca = kvm->arch.sca; | |
1357 | struct esca_block *new_sca; | |
1358 | struct kvm_vcpu *vcpu; | |
1359 | unsigned int vcpu_idx; | |
1360 | u32 scaol, scaoh; | |
1361 | ||
1362 | new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO); | |
1363 | if (!new_sca) | |
1364 | return -ENOMEM; | |
1365 | ||
1366 | scaoh = (u32)((u64)(new_sca) >> 32); | |
1367 | scaol = (u32)(u64)(new_sca) & ~0x3fU; | |
1368 | ||
1369 | kvm_s390_vcpu_block_all(kvm); | |
1370 | write_lock(&kvm->arch.sca_lock); | |
1371 | ||
1372 | sca_copy_b_to_e(new_sca, old_sca); | |
1373 | ||
1374 | kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) { | |
1375 | vcpu->arch.sie_block->scaoh = scaoh; | |
1376 | vcpu->arch.sie_block->scaol = scaol; | |
1377 | vcpu->arch.sie_block->ecb2 |= 0x04U; | |
1378 | } | |
1379 | kvm->arch.sca = new_sca; | |
1380 | kvm->arch.use_esca = 1; | |
1381 | ||
1382 | write_unlock(&kvm->arch.sca_lock); | |
1383 | kvm_s390_vcpu_unblock_all(kvm); | |
1384 | ||
1385 | free_page((unsigned long)old_sca); | |
1386 | ||
8335713a CB |
1387 | VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)", |
1388 | old_sca, kvm->arch.sca); | |
5e044315 | 1389 | return 0; |
a6e2f683 ED |
1390 | } |
1391 | ||
1392 | static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id) | |
1393 | { | |
5e044315 ED |
1394 | int rc; |
1395 | ||
1396 | if (id < KVM_S390_BSCA_CPU_SLOTS) | |
1397 | return true; | |
1398 | if (!sclp.has_esca) | |
1399 | return false; | |
1400 | ||
1401 | mutex_lock(&kvm->lock); | |
1402 | rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm); | |
1403 | mutex_unlock(&kvm->lock); | |
1404 | ||
1405 | return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS; | |
a6e2f683 ED |
1406 | } |
1407 | ||
b0c632db HC |
1408 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1409 | { | |
3c038e6b DD |
1410 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1411 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1412 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1413 | KVM_SYNC_GPRS | | |
9eed0735 | 1414 | KVM_SYNC_ACRS | |
b028ee3e DH |
1415 | KVM_SYNC_CRS | |
1416 | KVM_SYNC_ARCH0 | | |
1417 | KVM_SYNC_PFAULT; | |
c6e5f166 FZ |
1418 | if (test_kvm_facility(vcpu->kvm, 64)) |
1419 | vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB; | |
f6aa6dc4 DH |
1420 | /* fprs can be synchronized via vrs, even if the guest has no vx. With |
1421 | * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. | |
1422 | */ | |
1423 | if (MACHINE_HAS_VX) | |
68c55750 | 1424 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; |
6fd8e67d DH |
1425 | else |
1426 | vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS; | |
dafd032a DD |
1427 | |
1428 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1429 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1430 | ||
b0c632db HC |
1431 | return 0; |
1432 | } | |
1433 | ||
db0758b2 DH |
1434 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
1435 | static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1436 | { | |
1437 | WARN_ON_ONCE(vcpu->arch.cputm_start != 0); | |
9c23a131 | 1438 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1439 | vcpu->arch.cputm_start = get_tod_clock_fast(); |
9c23a131 | 1440 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1441 | } |
1442 | ||
1443 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1444 | static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1445 | { | |
1446 | WARN_ON_ONCE(vcpu->arch.cputm_start == 0); | |
9c23a131 | 1447 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1448 | vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start; |
1449 | vcpu->arch.cputm_start = 0; | |
9c23a131 | 1450 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1451 | } |
1452 | ||
1453 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1454 | static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1455 | { | |
1456 | WARN_ON_ONCE(vcpu->arch.cputm_enabled); | |
1457 | vcpu->arch.cputm_enabled = true; | |
1458 | __start_cpu_timer_accounting(vcpu); | |
1459 | } | |
1460 | ||
1461 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1462 | static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1463 | { | |
1464 | WARN_ON_ONCE(!vcpu->arch.cputm_enabled); | |
1465 | __stop_cpu_timer_accounting(vcpu); | |
1466 | vcpu->arch.cputm_enabled = false; | |
1467 | } | |
1468 | ||
1469 | static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1470 | { | |
1471 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1472 | __enable_cpu_timer_accounting(vcpu); | |
1473 | preempt_enable(); | |
1474 | } | |
1475 | ||
1476 | static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1477 | { | |
1478 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1479 | __disable_cpu_timer_accounting(vcpu); | |
1480 | preempt_enable(); | |
1481 | } | |
1482 | ||
4287f247 DH |
1483 | /* set the cpu timer - may only be called from the VCPU thread itself */ |
1484 | void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm) | |
1485 | { | |
db0758b2 | 1486 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
9c23a131 | 1487 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1488 | if (vcpu->arch.cputm_enabled) |
1489 | vcpu->arch.cputm_start = get_tod_clock_fast(); | |
4287f247 | 1490 | vcpu->arch.sie_block->cputm = cputm; |
9c23a131 | 1491 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1492 | preempt_enable(); |
4287f247 DH |
1493 | } |
1494 | ||
db0758b2 | 1495 | /* update and get the cpu timer - can also be called from other VCPU threads */ |
4287f247 DH |
1496 | __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) |
1497 | { | |
9c23a131 | 1498 | unsigned int seq; |
db0758b2 | 1499 | __u64 value; |
db0758b2 DH |
1500 | |
1501 | if (unlikely(!vcpu->arch.cputm_enabled)) | |
1502 | return vcpu->arch.sie_block->cputm; | |
1503 | ||
9c23a131 DH |
1504 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
1505 | do { | |
1506 | seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount); | |
1507 | /* | |
1508 | * If the writer would ever execute a read in the critical | |
1509 | * section, e.g. in irq context, we have a deadlock. | |
1510 | */ | |
1511 | WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu); | |
1512 | value = vcpu->arch.sie_block->cputm; | |
1513 | /* if cputm_start is 0, accounting is being started/stopped */ | |
1514 | if (likely(vcpu->arch.cputm_start)) | |
1515 | value -= get_tod_clock_fast() - vcpu->arch.cputm_start; | |
1516 | } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1)); | |
1517 | preempt_enable(); | |
db0758b2 | 1518 | return value; |
4287f247 DH |
1519 | } |
1520 | ||
b0c632db HC |
1521 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1522 | { | |
9977e886 | 1523 | /* Save host register state */ |
d0164ee2 | 1524 | save_fpu_regs(); |
9abc2a08 DH |
1525 | vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; |
1526 | vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; | |
9977e886 | 1527 | |
6fd8e67d DH |
1528 | if (MACHINE_HAS_VX) |
1529 | current->thread.fpu.regs = vcpu->run->s.regs.vrs; | |
1530 | else | |
1531 | current->thread.fpu.regs = vcpu->run->s.regs.fprs; | |
9abc2a08 | 1532 | current->thread.fpu.fpc = vcpu->run->s.regs.fpc; |
9977e886 | 1533 | if (test_fp_ctl(current->thread.fpu.fpc)) |
96b2d7a8 | 1534 | /* User space provided an invalid FPC, let's clear it */ |
9977e886 HB |
1535 | current->thread.fpu.fpc = 0; |
1536 | ||
1537 | save_access_regs(vcpu->arch.host_acrs); | |
59674c1a | 1538 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 1539 | gmap_enable(vcpu->arch.gmap); |
805de8f4 | 1540 | atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
5ebda316 | 1541 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1542 | __start_cpu_timer_accounting(vcpu); |
01a745ac | 1543 | vcpu->cpu = cpu; |
b0c632db HC |
1544 | } |
1545 | ||
1546 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1547 | { | |
01a745ac | 1548 | vcpu->cpu = -1; |
5ebda316 | 1549 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1550 | __stop_cpu_timer_accounting(vcpu); |
805de8f4 | 1551 | atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 1552 | gmap_disable(vcpu->arch.gmap); |
9977e886 | 1553 | |
9abc2a08 | 1554 | /* Save guest register state */ |
d0164ee2 | 1555 | save_fpu_regs(); |
9abc2a08 | 1556 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
9977e886 | 1557 | |
9abc2a08 DH |
1558 | /* Restore host register state */ |
1559 | current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; | |
1560 | current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; | |
9977e886 HB |
1561 | |
1562 | save_access_regs(vcpu->run->s.regs.acrs); | |
b0c632db HC |
1563 | restore_access_regs(vcpu->arch.host_acrs); |
1564 | } | |
1565 | ||
1566 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1567 | { | |
1568 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1569 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1570 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1571 | kvm_s390_set_prefix(vcpu, 0); |
4287f247 | 1572 | kvm_s390_set_cpu_timer(vcpu, 0); |
b0c632db HC |
1573 | vcpu->arch.sie_block->ckc = 0UL; |
1574 | vcpu->arch.sie_block->todpr = 0; | |
1575 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1576 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1577 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
9abc2a08 DH |
1578 | /* make sure the new fpc will be lazily loaded */ |
1579 | save_fpu_regs(); | |
1580 | current->thread.fpu.fpc = 0; | |
b0c632db | 1581 | vcpu->arch.sie_block->gbea = 1; |
672550fb | 1582 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1583 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1584 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1585 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1586 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1587 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1588 | } |
1589 | ||
31928aa5 | 1590 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1591 | { |
72f25020 | 1592 | mutex_lock(&vcpu->kvm->lock); |
fdf03650 | 1593 | preempt_disable(); |
72f25020 | 1594 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
fdf03650 | 1595 | preempt_enable(); |
72f25020 | 1596 | mutex_unlock(&vcpu->kvm->lock); |
25508824 | 1597 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
dafd032a | 1598 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
eaa78f34 | 1599 | sca_add_vcpu(vcpu); |
25508824 DH |
1600 | } |
1601 | ||
42897d86 MT |
1602 | } |
1603 | ||
5102ee87 TK |
1604 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1605 | { | |
9d8d5786 | 1606 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1607 | return; |
1608 | ||
a374e892 TK |
1609 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1610 | ||
1611 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1612 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1613 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1614 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1615 | ||
5102ee87 TK |
1616 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1617 | } | |
1618 | ||
b31605c1 DD |
1619 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1620 | { | |
1621 | free_page(vcpu->arch.sie_block->cbrlo); | |
1622 | vcpu->arch.sie_block->cbrlo = 0; | |
1623 | } | |
1624 | ||
1625 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1626 | { | |
1627 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1628 | if (!vcpu->arch.sie_block->cbrlo) | |
1629 | return -ENOMEM; | |
1630 | ||
1631 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1632 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1633 | return 0; | |
1634 | } | |
1635 | ||
91520f1a MM |
1636 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1637 | { | |
1638 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1639 | ||
91520f1a | 1640 | vcpu->arch.sie_block->ibc = model->ibc; |
80bc79dc | 1641 | if (test_kvm_facility(vcpu->kvm, 7)) |
c54f0d6a | 1642 | vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list; |
91520f1a MM |
1643 | } |
1644 | ||
b0c632db HC |
1645 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1646 | { | |
b31605c1 | 1647 | int rc = 0; |
b31288fa | 1648 | |
9e6dabef CH |
1649 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1650 | CPUSTAT_SM | | |
a4a4f191 GH |
1651 | CPUSTAT_STOPPED); |
1652 | ||
53df84f8 | 1653 | if (test_kvm_facility(vcpu->kvm, 78)) |
805de8f4 | 1654 | atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); |
53df84f8 | 1655 | else if (test_kvm_facility(vcpu->kvm, 8)) |
805de8f4 | 1656 | atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
a4a4f191 | 1657 | |
91520f1a MM |
1658 | kvm_s390_vcpu_setup_model(vcpu); |
1659 | ||
bd50e8ec DH |
1660 | vcpu->arch.sie_block->ecb = 0x02; |
1661 | if (test_kvm_facility(vcpu->kvm, 9)) | |
1662 | vcpu->arch.sie_block->ecb |= 0x04; | |
9d8d5786 | 1663 | if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1664 | vcpu->arch.sie_block->ecb |= 0x10; |
1665 | ||
d6af0b49 DH |
1666 | if (test_kvm_facility(vcpu->kvm, 8)) |
1667 | vcpu->arch.sie_block->ecb2 |= 0x08; | |
ea5f4969 | 1668 | vcpu->arch.sie_block->eca = 0xC1002000U; |
37c5f6c8 | 1669 | if (sclp.has_siif) |
217a4406 | 1670 | vcpu->arch.sie_block->eca |= 1; |
37c5f6c8 | 1671 | if (sclp.has_sigpif) |
ea5f4969 | 1672 | vcpu->arch.sie_block->eca |= 0x10000000U; |
c6e5f166 FZ |
1673 | if (test_kvm_facility(vcpu->kvm, 64)) |
1674 | vcpu->arch.sie_block->ecb3 |= 0x01; | |
18280d8b | 1675 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1676 | vcpu->arch.sie_block->eca |= 0x00020000; |
1677 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1678 | } | |
c6e5f166 | 1679 | vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb; |
492d8642 | 1680 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1681 | |
e6db1d61 | 1682 | if (vcpu->kvm->arch.use_cmma) { |
b31605c1 DD |
1683 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
1684 | if (rc) | |
1685 | return rc; | |
b31288fa | 1686 | } |
0ac96caf | 1687 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1688 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1689 | |
5102ee87 TK |
1690 | kvm_s390_vcpu_crypto_setup(vcpu); |
1691 | ||
b31605c1 | 1692 | return rc; |
b0c632db HC |
1693 | } |
1694 | ||
1695 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1696 | unsigned int id) | |
1697 | { | |
4d47555a | 1698 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1699 | struct sie_page *sie_page; |
4d47555a CO |
1700 | int rc = -EINVAL; |
1701 | ||
4215825e | 1702 | if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id)) |
4d47555a CO |
1703 | goto out; |
1704 | ||
1705 | rc = -ENOMEM; | |
b0c632db | 1706 | |
b110feaf | 1707 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1708 | if (!vcpu) |
4d47555a | 1709 | goto out; |
b0c632db | 1710 | |
7feb6bb8 MM |
1711 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1712 | if (!sie_page) | |
b0c632db HC |
1713 | goto out_free_cpu; |
1714 | ||
7feb6bb8 MM |
1715 | vcpu->arch.sie_block = &sie_page->sie_block; |
1716 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
1717 | ||
b0c632db | 1718 | vcpu->arch.sie_block->icpua = id; |
ba5c1e9b | 1719 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1720 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 1721 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 1722 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
9c23a131 | 1723 | seqcount_init(&vcpu->arch.cputm_seqcount); |
ba5c1e9b | 1724 | |
b0c632db HC |
1725 | rc = kvm_vcpu_init(vcpu, kvm, id); |
1726 | if (rc) | |
9abc2a08 | 1727 | goto out_free_sie_block; |
8335713a | 1728 | VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu, |
b0c632db | 1729 | vcpu->arch.sie_block); |
ade38c31 | 1730 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 1731 | |
b0c632db | 1732 | return vcpu; |
7b06bf2f WY |
1733 | out_free_sie_block: |
1734 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 1735 | out_free_cpu: |
b110feaf | 1736 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 1737 | out: |
b0c632db HC |
1738 | return ERR_PTR(rc); |
1739 | } | |
1740 | ||
b0c632db HC |
1741 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
1742 | { | |
9a022067 | 1743 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
1744 | } |
1745 | ||
27406cd5 | 1746 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e | 1747 | { |
805de8f4 | 1748 | atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1749 | exit_sie(vcpu); |
49b99e1e CB |
1750 | } |
1751 | ||
27406cd5 | 1752 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e | 1753 | { |
805de8f4 | 1754 | atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
49b99e1e CB |
1755 | } |
1756 | ||
8e236546 CB |
1757 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
1758 | { | |
805de8f4 | 1759 | atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1760 | exit_sie(vcpu); |
8e236546 CB |
1761 | } |
1762 | ||
1763 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
1764 | { | |
9bf9fde2 | 1765 | atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
8e236546 CB |
1766 | } |
1767 | ||
49b99e1e CB |
1768 | /* |
1769 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
1770 | * If the CPU is not running (e.g. waiting as idle) the function will | |
1771 | * return immediately. */ | |
1772 | void exit_sie(struct kvm_vcpu *vcpu) | |
1773 | { | |
805de8f4 | 1774 | atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
49b99e1e CB |
1775 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
1776 | cpu_relax(); | |
1777 | } | |
1778 | ||
8e236546 CB |
1779 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
1780 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 1781 | { |
8e236546 CB |
1782 | kvm_make_request(req, vcpu); |
1783 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
1784 | } |
1785 | ||
2c70fe44 CB |
1786 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
1787 | { | |
1788 | int i; | |
1789 | struct kvm *kvm = gmap->private; | |
1790 | struct kvm_vcpu *vcpu; | |
1791 | ||
1792 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1793 | /* match against both prefix pages */ | |
fda902cb | 1794 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 | 1795 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
8e236546 | 1796 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
1797 | } |
1798 | } | |
1799 | } | |
1800 | ||
b6d33834 CD |
1801 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
1802 | { | |
1803 | /* kvm common code refers to this, but never calls it */ | |
1804 | BUG(); | |
1805 | return 0; | |
1806 | } | |
1807 | ||
14eebd91 CO |
1808 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
1809 | struct kvm_one_reg *reg) | |
1810 | { | |
1811 | int r = -EINVAL; | |
1812 | ||
1813 | switch (reg->id) { | |
29b7c71b CO |
1814 | case KVM_REG_S390_TODPR: |
1815 | r = put_user(vcpu->arch.sie_block->todpr, | |
1816 | (u32 __user *)reg->addr); | |
1817 | break; | |
1818 | case KVM_REG_S390_EPOCHDIFF: | |
1819 | r = put_user(vcpu->arch.sie_block->epoch, | |
1820 | (u64 __user *)reg->addr); | |
1821 | break; | |
46a6dd1c | 1822 | case KVM_REG_S390_CPU_TIMER: |
4287f247 | 1823 | r = put_user(kvm_s390_get_cpu_timer(vcpu), |
46a6dd1c J |
1824 | (u64 __user *)reg->addr); |
1825 | break; | |
1826 | case KVM_REG_S390_CLOCK_COMP: | |
1827 | r = put_user(vcpu->arch.sie_block->ckc, | |
1828 | (u64 __user *)reg->addr); | |
1829 | break; | |
536336c2 DD |
1830 | case KVM_REG_S390_PFTOKEN: |
1831 | r = put_user(vcpu->arch.pfault_token, | |
1832 | (u64 __user *)reg->addr); | |
1833 | break; | |
1834 | case KVM_REG_S390_PFCOMPARE: | |
1835 | r = put_user(vcpu->arch.pfault_compare, | |
1836 | (u64 __user *)reg->addr); | |
1837 | break; | |
1838 | case KVM_REG_S390_PFSELECT: | |
1839 | r = put_user(vcpu->arch.pfault_select, | |
1840 | (u64 __user *)reg->addr); | |
1841 | break; | |
672550fb CB |
1842 | case KVM_REG_S390_PP: |
1843 | r = put_user(vcpu->arch.sie_block->pp, | |
1844 | (u64 __user *)reg->addr); | |
1845 | break; | |
afa45ff5 CB |
1846 | case KVM_REG_S390_GBEA: |
1847 | r = put_user(vcpu->arch.sie_block->gbea, | |
1848 | (u64 __user *)reg->addr); | |
1849 | break; | |
14eebd91 CO |
1850 | default: |
1851 | break; | |
1852 | } | |
1853 | ||
1854 | return r; | |
1855 | } | |
1856 | ||
1857 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
1858 | struct kvm_one_reg *reg) | |
1859 | { | |
1860 | int r = -EINVAL; | |
4287f247 | 1861 | __u64 val; |
14eebd91 CO |
1862 | |
1863 | switch (reg->id) { | |
29b7c71b CO |
1864 | case KVM_REG_S390_TODPR: |
1865 | r = get_user(vcpu->arch.sie_block->todpr, | |
1866 | (u32 __user *)reg->addr); | |
1867 | break; | |
1868 | case KVM_REG_S390_EPOCHDIFF: | |
1869 | r = get_user(vcpu->arch.sie_block->epoch, | |
1870 | (u64 __user *)reg->addr); | |
1871 | break; | |
46a6dd1c | 1872 | case KVM_REG_S390_CPU_TIMER: |
4287f247 DH |
1873 | r = get_user(val, (u64 __user *)reg->addr); |
1874 | if (!r) | |
1875 | kvm_s390_set_cpu_timer(vcpu, val); | |
46a6dd1c J |
1876 | break; |
1877 | case KVM_REG_S390_CLOCK_COMP: | |
1878 | r = get_user(vcpu->arch.sie_block->ckc, | |
1879 | (u64 __user *)reg->addr); | |
1880 | break; | |
536336c2 DD |
1881 | case KVM_REG_S390_PFTOKEN: |
1882 | r = get_user(vcpu->arch.pfault_token, | |
1883 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
1884 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
1885 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
1886 | break; |
1887 | case KVM_REG_S390_PFCOMPARE: | |
1888 | r = get_user(vcpu->arch.pfault_compare, | |
1889 | (u64 __user *)reg->addr); | |
1890 | break; | |
1891 | case KVM_REG_S390_PFSELECT: | |
1892 | r = get_user(vcpu->arch.pfault_select, | |
1893 | (u64 __user *)reg->addr); | |
1894 | break; | |
672550fb CB |
1895 | case KVM_REG_S390_PP: |
1896 | r = get_user(vcpu->arch.sie_block->pp, | |
1897 | (u64 __user *)reg->addr); | |
1898 | break; | |
afa45ff5 CB |
1899 | case KVM_REG_S390_GBEA: |
1900 | r = get_user(vcpu->arch.sie_block->gbea, | |
1901 | (u64 __user *)reg->addr); | |
1902 | break; | |
14eebd91 CO |
1903 | default: |
1904 | break; | |
1905 | } | |
1906 | ||
1907 | return r; | |
1908 | } | |
b6d33834 | 1909 | |
b0c632db HC |
1910 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
1911 | { | |
b0c632db | 1912 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
1913 | return 0; |
1914 | } | |
1915 | ||
1916 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1917 | { | |
5a32c1af | 1918 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
1919 | return 0; |
1920 | } | |
1921 | ||
1922 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1923 | { | |
5a32c1af | 1924 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
1925 | return 0; |
1926 | } | |
1927 | ||
1928 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
1929 | struct kvm_sregs *sregs) | |
1930 | { | |
59674c1a | 1931 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 1932 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 1933 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
1934 | return 0; |
1935 | } | |
1936 | ||
1937 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
1938 | struct kvm_sregs *sregs) | |
1939 | { | |
59674c1a | 1940 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 1941 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
1942 | return 0; |
1943 | } | |
1944 | ||
1945 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1946 | { | |
9abc2a08 DH |
1947 | /* make sure the new values will be lazily loaded */ |
1948 | save_fpu_regs(); | |
4725c860 MS |
1949 | if (test_fp_ctl(fpu->fpc)) |
1950 | return -EINVAL; | |
9abc2a08 DH |
1951 | current->thread.fpu.fpc = fpu->fpc; |
1952 | if (MACHINE_HAS_VX) | |
1953 | convert_fp_to_vx(current->thread.fpu.vxrs, (freg_t *)fpu->fprs); | |
1954 | else | |
1955 | memcpy(current->thread.fpu.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
b0c632db HC |
1956 | return 0; |
1957 | } | |
1958 | ||
1959 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1960 | { | |
9abc2a08 DH |
1961 | /* make sure we have the latest values */ |
1962 | save_fpu_regs(); | |
1963 | if (MACHINE_HAS_VX) | |
1964 | convert_vx_to_fp((freg_t *)fpu->fprs, current->thread.fpu.vxrs); | |
1965 | else | |
1966 | memcpy(fpu->fprs, current->thread.fpu.fprs, sizeof(fpu->fprs)); | |
1967 | fpu->fpc = current->thread.fpu.fpc; | |
b0c632db HC |
1968 | return 0; |
1969 | } | |
1970 | ||
1971 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
1972 | { | |
1973 | int rc = 0; | |
1974 | ||
7a42fdc2 | 1975 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 1976 | rc = -EBUSY; |
d7b0b5eb CO |
1977 | else { |
1978 | vcpu->run->psw_mask = psw.mask; | |
1979 | vcpu->run->psw_addr = psw.addr; | |
1980 | } | |
b0c632db HC |
1981 | return rc; |
1982 | } | |
1983 | ||
1984 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1985 | struct kvm_translation *tr) | |
1986 | { | |
1987 | return -EINVAL; /* not implemented yet */ | |
1988 | } | |
1989 | ||
27291e21 DH |
1990 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
1991 | KVM_GUESTDBG_USE_HW_BP | \ | |
1992 | KVM_GUESTDBG_ENABLE) | |
1993 | ||
d0bfb940 JK |
1994 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
1995 | struct kvm_guest_debug *dbg) | |
b0c632db | 1996 | { |
27291e21 DH |
1997 | int rc = 0; |
1998 | ||
1999 | vcpu->guest_debug = 0; | |
2000 | kvm_s390_clear_bp_data(vcpu); | |
2001 | ||
2de3bfc2 | 2002 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
2003 | return -EINVAL; |
2004 | ||
2005 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
2006 | vcpu->guest_debug = dbg->control; | |
2007 | /* enforce guest PER */ | |
805de8f4 | 2008 | atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2009 | |
2010 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
2011 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
2012 | } else { | |
805de8f4 | 2013 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2014 | vcpu->arch.guestdbg.last_bp = 0; |
2015 | } | |
2016 | ||
2017 | if (rc) { | |
2018 | vcpu->guest_debug = 0; | |
2019 | kvm_s390_clear_bp_data(vcpu); | |
805de8f4 | 2020 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2021 | } |
2022 | ||
2023 | return rc; | |
b0c632db HC |
2024 | } |
2025 | ||
62d9f0db MT |
2026 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
2027 | struct kvm_mp_state *mp_state) | |
2028 | { | |
6352e4d2 DH |
2029 | /* CHECK_STOP and LOAD are not supported yet */ |
2030 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
2031 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
2032 | } |
2033 | ||
2034 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
2035 | struct kvm_mp_state *mp_state) | |
2036 | { | |
6352e4d2 DH |
2037 | int rc = 0; |
2038 | ||
2039 | /* user space knows about this interface - let it control the state */ | |
2040 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
2041 | ||
2042 | switch (mp_state->mp_state) { | |
2043 | case KVM_MP_STATE_STOPPED: | |
2044 | kvm_s390_vcpu_stop(vcpu); | |
2045 | break; | |
2046 | case KVM_MP_STATE_OPERATING: | |
2047 | kvm_s390_vcpu_start(vcpu); | |
2048 | break; | |
2049 | case KVM_MP_STATE_LOAD: | |
2050 | case KVM_MP_STATE_CHECK_STOP: | |
2051 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
2052 | default: | |
2053 | rc = -ENXIO; | |
2054 | } | |
2055 | ||
2056 | return rc; | |
62d9f0db MT |
2057 | } |
2058 | ||
8ad35755 DH |
2059 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
2060 | { | |
2061 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
2062 | } | |
2063 | ||
2c70fe44 CB |
2064 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
2065 | { | |
8ad35755 | 2066 | retry: |
8e236546 | 2067 | kvm_s390_vcpu_request_handled(vcpu); |
586b7ccd CB |
2068 | if (!vcpu->requests) |
2069 | return 0; | |
2c70fe44 CB |
2070 | /* |
2071 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
2072 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
2073 | * This ensures that the ipte instruction for this request has | |
2074 | * already finished. We might race against a second unmapper that | |
2075 | * wants to set the blocking bit. Lets just retry the request loop. | |
2076 | */ | |
8ad35755 | 2077 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
2078 | int rc; |
2079 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 2080 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
2081 | PAGE_SIZE * 2); |
2082 | if (rc) | |
2083 | return rc; | |
8ad35755 | 2084 | goto retry; |
2c70fe44 | 2085 | } |
8ad35755 | 2086 | |
d3d692c8 DH |
2087 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
2088 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
2089 | goto retry; | |
2090 | } | |
2091 | ||
8ad35755 DH |
2092 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
2093 | if (!ibs_enabled(vcpu)) { | |
2094 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
805de8f4 | 2095 | atomic_or(CPUSTAT_IBS, |
8ad35755 DH |
2096 | &vcpu->arch.sie_block->cpuflags); |
2097 | } | |
2098 | goto retry; | |
2c70fe44 | 2099 | } |
8ad35755 DH |
2100 | |
2101 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
2102 | if (ibs_enabled(vcpu)) { | |
2103 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
805de8f4 | 2104 | atomic_andnot(CPUSTAT_IBS, |
8ad35755 DH |
2105 | &vcpu->arch.sie_block->cpuflags); |
2106 | } | |
2107 | goto retry; | |
2108 | } | |
2109 | ||
0759d068 DH |
2110 | /* nothing to do, just clear the request */ |
2111 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
2112 | ||
2c70fe44 CB |
2113 | return 0; |
2114 | } | |
2115 | ||
25ed1675 DH |
2116 | void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod) |
2117 | { | |
2118 | struct kvm_vcpu *vcpu; | |
2119 | int i; | |
2120 | ||
2121 | mutex_lock(&kvm->lock); | |
2122 | preempt_disable(); | |
2123 | kvm->arch.epoch = tod - get_tod_clock(); | |
2124 | kvm_s390_vcpu_block_all(kvm); | |
2125 | kvm_for_each_vcpu(i, vcpu, kvm) | |
2126 | vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
2127 | kvm_s390_vcpu_unblock_all(kvm); | |
2128 | preempt_enable(); | |
2129 | mutex_unlock(&kvm->lock); | |
2130 | } | |
2131 | ||
fa576c58 TH |
2132 | /** |
2133 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
2134 | * @vcpu: The corresponding virtual cpu | |
2135 | * @gpa: Guest physical address | |
2136 | * @writable: Whether the page should be writable or not | |
2137 | * | |
2138 | * Make sure that a guest page has been faulted-in on the host. | |
2139 | * | |
2140 | * Return: Zero on success, negative error code otherwise. | |
2141 | */ | |
2142 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 2143 | { |
527e30b4 MS |
2144 | return gmap_fault(vcpu->arch.gmap, gpa, |
2145 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
2146 | } |
2147 | ||
3c038e6b DD |
2148 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
2149 | unsigned long token) | |
2150 | { | |
2151 | struct kvm_s390_interrupt inti; | |
383d0b05 | 2152 | struct kvm_s390_irq irq; |
3c038e6b DD |
2153 | |
2154 | if (start_token) { | |
383d0b05 JF |
2155 | irq.u.ext.ext_params2 = token; |
2156 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
2157 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
2158 | } else { |
2159 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 2160 | inti.parm64 = token; |
3c038e6b DD |
2161 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
2162 | } | |
2163 | } | |
2164 | ||
2165 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
2166 | struct kvm_async_pf *work) | |
2167 | { | |
2168 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
2169 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
2170 | } | |
2171 | ||
2172 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
2173 | struct kvm_async_pf *work) | |
2174 | { | |
2175 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
2176 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
2177 | } | |
2178 | ||
2179 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
2180 | struct kvm_async_pf *work) | |
2181 | { | |
2182 | /* s390 will always inject the page directly */ | |
2183 | } | |
2184 | ||
2185 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
2186 | { | |
2187 | /* | |
2188 | * s390 will always inject the page directly, | |
2189 | * but we still want check_async_completion to cleanup | |
2190 | */ | |
2191 | return true; | |
2192 | } | |
2193 | ||
2194 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
2195 | { | |
2196 | hva_t hva; | |
2197 | struct kvm_arch_async_pf arch; | |
2198 | int rc; | |
2199 | ||
2200 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
2201 | return 0; | |
2202 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
2203 | vcpu->arch.pfault_compare) | |
2204 | return 0; | |
2205 | if (psw_extint_disabled(vcpu)) | |
2206 | return 0; | |
9a022067 | 2207 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
2208 | return 0; |
2209 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
2210 | return 0; | |
2211 | if (!vcpu->arch.gmap->pfault_enabled) | |
2212 | return 0; | |
2213 | ||
81480cc1 HC |
2214 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
2215 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
2216 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
2217 | return 0; |
2218 | ||
2219 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
2220 | return rc; | |
2221 | } | |
2222 | ||
3fb4c40f | 2223 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 2224 | { |
3fb4c40f | 2225 | int rc, cpuflags; |
e168bf8d | 2226 | |
3c038e6b DD |
2227 | /* |
2228 | * On s390 notifications for arriving pages will be delivered directly | |
2229 | * to the guest but the house keeping for completed pfaults is | |
2230 | * handled outside the worker. | |
2231 | */ | |
2232 | kvm_check_async_pf_completion(vcpu); | |
2233 | ||
7ec7c8c7 CB |
2234 | vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14]; |
2235 | vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15]; | |
b0c632db HC |
2236 | |
2237 | if (need_resched()) | |
2238 | schedule(); | |
2239 | ||
d3a73acb | 2240 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
2241 | s390_handle_mcck(); |
2242 | ||
79395031 JF |
2243 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
2244 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
2245 | if (rc) | |
2246 | return rc; | |
2247 | } | |
0ff31867 | 2248 | |
2c70fe44 CB |
2249 | rc = kvm_s390_handle_requests(vcpu); |
2250 | if (rc) | |
2251 | return rc; | |
2252 | ||
27291e21 DH |
2253 | if (guestdbg_enabled(vcpu)) { |
2254 | kvm_s390_backup_guest_per_regs(vcpu); | |
2255 | kvm_s390_patch_guest_per_regs(vcpu); | |
2256 | } | |
2257 | ||
b0c632db | 2258 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
2259 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
2260 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
2261 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 2262 | |
3fb4c40f TH |
2263 | return 0; |
2264 | } | |
2265 | ||
492d8642 TH |
2266 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
2267 | { | |
56317920 DH |
2268 | struct kvm_s390_pgm_info pgm_info = { |
2269 | .code = PGM_ADDRESSING, | |
2270 | }; | |
2271 | u8 opcode, ilen; | |
492d8642 TH |
2272 | int rc; |
2273 | ||
2274 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
2275 | trace_kvm_s390_sie_fault(vcpu); | |
2276 | ||
2277 | /* | |
2278 | * We want to inject an addressing exception, which is defined as a | |
2279 | * suppressing or terminating exception. However, since we came here | |
2280 | * by a DAT access exception, the PSW still points to the faulting | |
2281 | * instruction since DAT exceptions are nullifying. So we've got | |
2282 | * to look up the current opcode to get the length of the instruction | |
2283 | * to be able to forward the PSW. | |
2284 | */ | |
65977322 | 2285 | rc = read_guest_instr(vcpu, &opcode, 1); |
56317920 | 2286 | ilen = insn_length(opcode); |
9b0d721a DH |
2287 | if (rc < 0) { |
2288 | return rc; | |
2289 | } else if (rc) { | |
2290 | /* Instruction-Fetching Exceptions - we can't detect the ilen. | |
2291 | * Forward by arbitrary ilc, injection will take care of | |
2292 | * nullification if necessary. | |
2293 | */ | |
2294 | pgm_info = vcpu->arch.pgm; | |
2295 | ilen = 4; | |
2296 | } | |
56317920 DH |
2297 | pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID; |
2298 | kvm_s390_forward_psw(vcpu, ilen); | |
2299 | return kvm_s390_inject_prog_irq(vcpu, &pgm_info); | |
492d8642 TH |
2300 | } |
2301 | ||
3fb4c40f TH |
2302 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
2303 | { | |
2b29a9fd DD |
2304 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
2305 | vcpu->arch.sie_block->icptcode); | |
2306 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
2307 | ||
27291e21 DH |
2308 | if (guestdbg_enabled(vcpu)) |
2309 | kvm_s390_restore_guest_per_regs(vcpu); | |
2310 | ||
7ec7c8c7 CB |
2311 | vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14; |
2312 | vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15; | |
71f116bf DH |
2313 | |
2314 | if (vcpu->arch.sie_block->icptcode > 0) { | |
2315 | int rc = kvm_handle_sie_intercept(vcpu); | |
2316 | ||
2317 | if (rc != -EOPNOTSUPP) | |
2318 | return rc; | |
2319 | vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2320 | vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
2321 | vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
2322 | vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2323 | return -EREMOTE; | |
2324 | } else if (exit_reason != -EFAULT) { | |
2325 | vcpu->stat.exit_null++; | |
2326 | return 0; | |
210b1607 TH |
2327 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
2328 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
2329 | vcpu->run->s390_ucontrol.trans_exc_code = | |
2330 | current->thread.gmap_addr; | |
2331 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
71f116bf | 2332 | return -EREMOTE; |
24eb3a82 | 2333 | } else if (current->thread.gmap_pfault) { |
3c038e6b | 2334 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 2335 | current->thread.gmap_pfault = 0; |
71f116bf DH |
2336 | if (kvm_arch_setup_async_pf(vcpu)) |
2337 | return 0; | |
2338 | return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1); | |
a76ccff6 | 2339 | } |
71f116bf | 2340 | return vcpu_post_run_fault_in_sie(vcpu); |
3fb4c40f TH |
2341 | } |
2342 | ||
2343 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
2344 | { | |
2345 | int rc, exit_reason; | |
2346 | ||
800c1065 TH |
2347 | /* |
2348 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
2349 | * ning the guest), so that memslots (and other stuff) are protected | |
2350 | */ | |
2351 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2352 | ||
a76ccff6 TH |
2353 | do { |
2354 | rc = vcpu_pre_run(vcpu); | |
2355 | if (rc) | |
2356 | break; | |
3fb4c40f | 2357 | |
800c1065 | 2358 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
2359 | /* |
2360 | * As PF_VCPU will be used in fault handler, between | |
2361 | * guest_enter and guest_exit should be no uaccess. | |
2362 | */ | |
0097d12e CB |
2363 | local_irq_disable(); |
2364 | __kvm_guest_enter(); | |
db0758b2 | 2365 | __disable_cpu_timer_accounting(vcpu); |
0097d12e | 2366 | local_irq_enable(); |
a76ccff6 TH |
2367 | exit_reason = sie64a(vcpu->arch.sie_block, |
2368 | vcpu->run->s.regs.gprs); | |
0097d12e | 2369 | local_irq_disable(); |
db0758b2 | 2370 | __enable_cpu_timer_accounting(vcpu); |
0097d12e CB |
2371 | __kvm_guest_exit(); |
2372 | local_irq_enable(); | |
800c1065 | 2373 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
2374 | |
2375 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 2376 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2377 | |
800c1065 | 2378 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2379 | return rc; |
b0c632db HC |
2380 | } |
2381 | ||
b028ee3e DH |
2382 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2383 | { | |
2384 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2385 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2386 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2387 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2388 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2389 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2390 | /* some control register changes require a tlb flush */ |
2391 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2392 | } |
2393 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
4287f247 | 2394 | kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm); |
b028ee3e DH |
2395 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; |
2396 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2397 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2398 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2399 | } | |
2400 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2401 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2402 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2403 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2404 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2405 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e DH |
2406 | } |
2407 | kvm_run->kvm_dirty_regs = 0; | |
2408 | } | |
2409 | ||
2410 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2411 | { | |
2412 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2413 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2414 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2415 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
4287f247 | 2416 | kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu); |
b028ee3e DH |
2417 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; |
2418 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2419 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2420 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2421 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2422 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2423 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
2424 | } | |
2425 | ||
b0c632db HC |
2426 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2427 | { | |
8f2abe6a | 2428 | int rc; |
b0c632db HC |
2429 | sigset_t sigsaved; |
2430 | ||
27291e21 DH |
2431 | if (guestdbg_exit_pending(vcpu)) { |
2432 | kvm_s390_prepare_debug_exit(vcpu); | |
2433 | return 0; | |
2434 | } | |
2435 | ||
b0c632db HC |
2436 | if (vcpu->sigset_active) |
2437 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2438 | ||
6352e4d2 DH |
2439 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2440 | kvm_s390_vcpu_start(vcpu); | |
2441 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 2442 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
2443 | vcpu->vcpu_id); |
2444 | return -EINVAL; | |
2445 | } | |
b0c632db | 2446 | |
b028ee3e | 2447 | sync_regs(vcpu, kvm_run); |
db0758b2 | 2448 | enable_cpu_timer_accounting(vcpu); |
d7b0b5eb | 2449 | |
dab4079d | 2450 | might_fault(); |
a76ccff6 | 2451 | rc = __vcpu_run(vcpu); |
9ace903d | 2452 | |
b1d16c49 CE |
2453 | if (signal_pending(current) && !rc) { |
2454 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2455 | rc = -EINTR; |
b1d16c49 | 2456 | } |
8f2abe6a | 2457 | |
27291e21 DH |
2458 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2459 | kvm_s390_prepare_debug_exit(vcpu); | |
2460 | rc = 0; | |
2461 | } | |
2462 | ||
8f2abe6a | 2463 | if (rc == -EREMOTE) { |
71f116bf | 2464 | /* userspace support is needed, kvm_run has been prepared */ |
8f2abe6a CB |
2465 | rc = 0; |
2466 | } | |
b0c632db | 2467 | |
db0758b2 | 2468 | disable_cpu_timer_accounting(vcpu); |
b028ee3e | 2469 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2470 | |
b0c632db HC |
2471 | if (vcpu->sigset_active) |
2472 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2473 | ||
b0c632db | 2474 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2475 | return rc; |
b0c632db HC |
2476 | } |
2477 | ||
b0c632db HC |
2478 | /* |
2479 | * store status at address | |
2480 | * we use have two special cases: | |
2481 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2482 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2483 | */ | |
d0bce605 | 2484 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2485 | { |
092670cd | 2486 | unsigned char archmode = 1; |
9abc2a08 | 2487 | freg_t fprs[NUM_FPRS]; |
fda902cb | 2488 | unsigned int px; |
4287f247 | 2489 | u64 clkcomp, cputm; |
d0bce605 | 2490 | int rc; |
b0c632db | 2491 | |
d9a3a09a | 2492 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 HC |
2493 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2494 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2495 | return -EFAULT; |
d9a3a09a | 2496 | gpa = 0; |
d0bce605 HC |
2497 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
2498 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2499 | return -EFAULT; |
d9a3a09a MS |
2500 | gpa = px; |
2501 | } else | |
2502 | gpa -= __LC_FPREGS_SAVE_AREA; | |
9abc2a08 DH |
2503 | |
2504 | /* manually convert vector registers if necessary */ | |
2505 | if (MACHINE_HAS_VX) { | |
9522b37f | 2506 | convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); |
9abc2a08 DH |
2507 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, |
2508 | fprs, 128); | |
2509 | } else { | |
2510 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, | |
6fd8e67d | 2511 | vcpu->run->s.regs.fprs, 128); |
9abc2a08 | 2512 | } |
d9a3a09a | 2513 | rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA, |
d0bce605 | 2514 | vcpu->run->s.regs.gprs, 128); |
d9a3a09a | 2515 | rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA, |
d0bce605 | 2516 | &vcpu->arch.sie_block->gpsw, 16); |
d9a3a09a | 2517 | rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA, |
fda902cb | 2518 | &px, 4); |
d9a3a09a | 2519 | rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA, |
9abc2a08 | 2520 | &vcpu->run->s.regs.fpc, 4); |
d9a3a09a | 2521 | rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA, |
d0bce605 | 2522 | &vcpu->arch.sie_block->todpr, 4); |
4287f247 | 2523 | cputm = kvm_s390_get_cpu_timer(vcpu); |
d9a3a09a | 2524 | rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA, |
4287f247 | 2525 | &cputm, 8); |
178bd789 | 2526 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d9a3a09a | 2527 | rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA, |
d0bce605 | 2528 | &clkcomp, 8); |
d9a3a09a | 2529 | rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA, |
d0bce605 | 2530 | &vcpu->run->s.regs.acrs, 64); |
d9a3a09a | 2531 | rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA, |
d0bce605 HC |
2532 | &vcpu->arch.sie_block->gcr, 128); |
2533 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2534 | } |
2535 | ||
e879892c TH |
2536 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2537 | { | |
2538 | /* | |
2539 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
2540 | * copying in vcpu load/put. Lets update our copies before we save | |
2541 | * it into the save area | |
2542 | */ | |
d0164ee2 | 2543 | save_fpu_regs(); |
9abc2a08 | 2544 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
e879892c TH |
2545 | save_access_regs(vcpu->run->s.regs.acrs); |
2546 | ||
2547 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2548 | } | |
2549 | ||
bc17de7c EF |
2550 | /* |
2551 | * store additional status at address | |
2552 | */ | |
2553 | int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, | |
2554 | unsigned long gpa) | |
2555 | { | |
2556 | /* Only bits 0-53 are used for address formation */ | |
2557 | if (!(gpa & ~0x3ff)) | |
2558 | return 0; | |
2559 | ||
2560 | return write_guest_abs(vcpu, gpa & ~0x3ff, | |
2561 | (void *)&vcpu->run->s.regs.vrs, 512); | |
2562 | } | |
2563 | ||
2564 | int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
2565 | { | |
2566 | if (!test_kvm_facility(vcpu->kvm, 129)) | |
2567 | return 0; | |
2568 | ||
2569 | /* | |
2570 | * The guest VXRS are in the host VXRs due to the lazy | |
9977e886 HB |
2571 | * copying in vcpu load/put. We can simply call save_fpu_regs() |
2572 | * to save the current register state because we are in the | |
2573 | * middle of a load/put cycle. | |
2574 | * | |
2575 | * Let's update our copies before we save it into the save area. | |
bc17de7c | 2576 | */ |
d0164ee2 | 2577 | save_fpu_regs(); |
bc17de7c EF |
2578 | |
2579 | return kvm_s390_store_adtl_status_unloaded(vcpu, addr); | |
2580 | } | |
2581 | ||
8ad35755 DH |
2582 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2583 | { | |
2584 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 2585 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
2586 | } |
2587 | ||
2588 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2589 | { | |
2590 | unsigned int i; | |
2591 | struct kvm_vcpu *vcpu; | |
2592 | ||
2593 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2594 | __disable_ibs_on_vcpu(vcpu); | |
2595 | } | |
2596 | } | |
2597 | ||
2598 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2599 | { | |
2600 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
8e236546 | 2601 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
2602 | } |
2603 | ||
6852d7b6 DH |
2604 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2605 | { | |
8ad35755 DH |
2606 | int i, online_vcpus, started_vcpus = 0; |
2607 | ||
2608 | if (!is_vcpu_stopped(vcpu)) | |
2609 | return; | |
2610 | ||
6852d7b6 | 2611 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2612 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2613 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2614 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2615 | ||
2616 | for (i = 0; i < online_vcpus; i++) { | |
2617 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2618 | started_vcpus++; | |
2619 | } | |
2620 | ||
2621 | if (started_vcpus == 0) { | |
2622 | /* we're the only active VCPU -> speed it up */ | |
2623 | __enable_ibs_on_vcpu(vcpu); | |
2624 | } else if (started_vcpus == 1) { | |
2625 | /* | |
2626 | * As we are starting a second VCPU, we have to disable | |
2627 | * the IBS facility on all VCPUs to remove potentially | |
2628 | * oustanding ENABLE requests. | |
2629 | */ | |
2630 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2631 | } | |
2632 | ||
805de8f4 | 2633 | atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2634 | /* |
2635 | * Another VCPU might have used IBS while we were offline. | |
2636 | * Let's play safe and flush the VCPU at startup. | |
2637 | */ | |
d3d692c8 | 2638 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2639 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2640 | return; |
6852d7b6 DH |
2641 | } |
2642 | ||
2643 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2644 | { | |
8ad35755 DH |
2645 | int i, online_vcpus, started_vcpus = 0; |
2646 | struct kvm_vcpu *started_vcpu = NULL; | |
2647 | ||
2648 | if (is_vcpu_stopped(vcpu)) | |
2649 | return; | |
2650 | ||
6852d7b6 | 2651 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2652 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2653 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2654 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2655 | ||
32f5ff63 | 2656 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2657 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2658 | |
805de8f4 | 2659 | atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2660 | __disable_ibs_on_vcpu(vcpu); |
2661 | ||
2662 | for (i = 0; i < online_vcpus; i++) { | |
2663 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2664 | started_vcpus++; | |
2665 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2666 | } | |
2667 | } | |
2668 | ||
2669 | if (started_vcpus == 1) { | |
2670 | /* | |
2671 | * As we only have one VCPU left, we want to enable the | |
2672 | * IBS facility for that VCPU to speed it up. | |
2673 | */ | |
2674 | __enable_ibs_on_vcpu(started_vcpu); | |
2675 | } | |
2676 | ||
433b9ee4 | 2677 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2678 | return; |
6852d7b6 DH |
2679 | } |
2680 | ||
d6712df9 CH |
2681 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2682 | struct kvm_enable_cap *cap) | |
2683 | { | |
2684 | int r; | |
2685 | ||
2686 | if (cap->flags) | |
2687 | return -EINVAL; | |
2688 | ||
2689 | switch (cap->cap) { | |
fa6b7fe9 CH |
2690 | case KVM_CAP_S390_CSS_SUPPORT: |
2691 | if (!vcpu->kvm->arch.css_support) { | |
2692 | vcpu->kvm->arch.css_support = 1; | |
c92ea7b9 | 2693 | VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
fa6b7fe9 CH |
2694 | trace_kvm_s390_enable_css(vcpu->kvm); |
2695 | } | |
2696 | r = 0; | |
2697 | break; | |
d6712df9 CH |
2698 | default: |
2699 | r = -EINVAL; | |
2700 | break; | |
2701 | } | |
2702 | return r; | |
2703 | } | |
2704 | ||
41408c28 TH |
2705 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
2706 | struct kvm_s390_mem_op *mop) | |
2707 | { | |
2708 | void __user *uaddr = (void __user *)mop->buf; | |
2709 | void *tmpbuf = NULL; | |
2710 | int r, srcu_idx; | |
2711 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
2712 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
2713 | ||
2714 | if (mop->flags & ~supported_flags) | |
2715 | return -EINVAL; | |
2716 | ||
2717 | if (mop->size > MEM_OP_MAX_SIZE) | |
2718 | return -E2BIG; | |
2719 | ||
2720 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
2721 | tmpbuf = vmalloc(mop->size); | |
2722 | if (!tmpbuf) | |
2723 | return -ENOMEM; | |
2724 | } | |
2725 | ||
2726 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2727 | ||
2728 | switch (mop->op) { | |
2729 | case KVM_S390_MEMOP_LOGICAL_READ: | |
2730 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
2731 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
2732 | mop->size, GACC_FETCH); | |
41408c28 TH |
2733 | break; |
2734 | } | |
2735 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2736 | if (r == 0) { | |
2737 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
2738 | r = -EFAULT; | |
2739 | } | |
2740 | break; | |
2741 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
2742 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
2743 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
2744 | mop->size, GACC_STORE); | |
41408c28 TH |
2745 | break; |
2746 | } | |
2747 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
2748 | r = -EFAULT; | |
2749 | break; | |
2750 | } | |
2751 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2752 | break; | |
2753 | default: | |
2754 | r = -EINVAL; | |
2755 | } | |
2756 | ||
2757 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
2758 | ||
2759 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
2760 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
2761 | ||
2762 | vfree(tmpbuf); | |
2763 | return r; | |
2764 | } | |
2765 | ||
b0c632db HC |
2766 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2767 | unsigned int ioctl, unsigned long arg) | |
2768 | { | |
2769 | struct kvm_vcpu *vcpu = filp->private_data; | |
2770 | void __user *argp = (void __user *)arg; | |
800c1065 | 2771 | int idx; |
bc923cc9 | 2772 | long r; |
b0c632db | 2773 | |
93736624 | 2774 | switch (ioctl) { |
47b43c52 JF |
2775 | case KVM_S390_IRQ: { |
2776 | struct kvm_s390_irq s390irq; | |
2777 | ||
2778 | r = -EFAULT; | |
2779 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
2780 | break; | |
2781 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
2782 | break; | |
2783 | } | |
93736624 | 2784 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 2785 | struct kvm_s390_interrupt s390int; |
383d0b05 | 2786 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 2787 | |
93736624 | 2788 | r = -EFAULT; |
ba5c1e9b | 2789 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 2790 | break; |
383d0b05 JF |
2791 | if (s390int_to_s390irq(&s390int, &s390irq)) |
2792 | return -EINVAL; | |
2793 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 2794 | break; |
ba5c1e9b | 2795 | } |
b0c632db | 2796 | case KVM_S390_STORE_STATUS: |
800c1065 | 2797 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 2798 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 2799 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 2800 | break; |
b0c632db HC |
2801 | case KVM_S390_SET_INITIAL_PSW: { |
2802 | psw_t psw; | |
2803 | ||
bc923cc9 | 2804 | r = -EFAULT; |
b0c632db | 2805 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
2806 | break; |
2807 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
2808 | break; | |
b0c632db HC |
2809 | } |
2810 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
2811 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
2812 | break; | |
14eebd91 CO |
2813 | case KVM_SET_ONE_REG: |
2814 | case KVM_GET_ONE_REG: { | |
2815 | struct kvm_one_reg reg; | |
2816 | r = -EFAULT; | |
2817 | if (copy_from_user(®, argp, sizeof(reg))) | |
2818 | break; | |
2819 | if (ioctl == KVM_SET_ONE_REG) | |
2820 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
2821 | else | |
2822 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
2823 | break; | |
2824 | } | |
27e0393f CO |
2825 | #ifdef CONFIG_KVM_S390_UCONTROL |
2826 | case KVM_S390_UCAS_MAP: { | |
2827 | struct kvm_s390_ucas_mapping ucasmap; | |
2828 | ||
2829 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2830 | r = -EFAULT; | |
2831 | break; | |
2832 | } | |
2833 | ||
2834 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2835 | r = -EINVAL; | |
2836 | break; | |
2837 | } | |
2838 | ||
2839 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
2840 | ucasmap.vcpu_addr, ucasmap.length); | |
2841 | break; | |
2842 | } | |
2843 | case KVM_S390_UCAS_UNMAP: { | |
2844 | struct kvm_s390_ucas_mapping ucasmap; | |
2845 | ||
2846 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2847 | r = -EFAULT; | |
2848 | break; | |
2849 | } | |
2850 | ||
2851 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2852 | r = -EINVAL; | |
2853 | break; | |
2854 | } | |
2855 | ||
2856 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
2857 | ucasmap.length); | |
2858 | break; | |
2859 | } | |
2860 | #endif | |
ccc7910f | 2861 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 2862 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
2863 | break; |
2864 | } | |
d6712df9 CH |
2865 | case KVM_ENABLE_CAP: |
2866 | { | |
2867 | struct kvm_enable_cap cap; | |
2868 | r = -EFAULT; | |
2869 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
2870 | break; | |
2871 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
2872 | break; | |
2873 | } | |
41408c28 TH |
2874 | case KVM_S390_MEM_OP: { |
2875 | struct kvm_s390_mem_op mem_op; | |
2876 | ||
2877 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
2878 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
2879 | else | |
2880 | r = -EFAULT; | |
2881 | break; | |
2882 | } | |
816c7667 JF |
2883 | case KVM_S390_SET_IRQ_STATE: { |
2884 | struct kvm_s390_irq_state irq_state; | |
2885 | ||
2886 | r = -EFAULT; | |
2887 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2888 | break; | |
2889 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
2890 | irq_state.len == 0 || | |
2891 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
2892 | r = -EINVAL; | |
2893 | break; | |
2894 | } | |
2895 | r = kvm_s390_set_irq_state(vcpu, | |
2896 | (void __user *) irq_state.buf, | |
2897 | irq_state.len); | |
2898 | break; | |
2899 | } | |
2900 | case KVM_S390_GET_IRQ_STATE: { | |
2901 | struct kvm_s390_irq_state irq_state; | |
2902 | ||
2903 | r = -EFAULT; | |
2904 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2905 | break; | |
2906 | if (irq_state.len == 0) { | |
2907 | r = -EINVAL; | |
2908 | break; | |
2909 | } | |
2910 | r = kvm_s390_get_irq_state(vcpu, | |
2911 | (__u8 __user *) irq_state.buf, | |
2912 | irq_state.len); | |
2913 | break; | |
2914 | } | |
b0c632db | 2915 | default: |
3e6afcf1 | 2916 | r = -ENOTTY; |
b0c632db | 2917 | } |
bc923cc9 | 2918 | return r; |
b0c632db HC |
2919 | } |
2920 | ||
5b1c1493 CO |
2921 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
2922 | { | |
2923 | #ifdef CONFIG_KVM_S390_UCONTROL | |
2924 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
2925 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
2926 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
2927 | get_page(vmf->page); | |
2928 | return 0; | |
2929 | } | |
2930 | #endif | |
2931 | return VM_FAULT_SIGBUS; | |
2932 | } | |
2933 | ||
5587027c AK |
2934 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
2935 | unsigned long npages) | |
db3fe4eb TY |
2936 | { |
2937 | return 0; | |
2938 | } | |
2939 | ||
b0c632db | 2940 | /* Section: memory related */ |
f7784b8e MT |
2941 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
2942 | struct kvm_memory_slot *memslot, | |
09170a49 | 2943 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 2944 | enum kvm_mr_change change) |
b0c632db | 2945 | { |
dd2887e7 NW |
2946 | /* A few sanity checks. We can have memory slots which have to be |
2947 | located/ended at a segment boundary (1MB). The memory in userland is | |
2948 | ok to be fragmented into various different vmas. It is okay to mmap() | |
2949 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 2950 | |
598841ca | 2951 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
2952 | return -EINVAL; |
2953 | ||
598841ca | 2954 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
2955 | return -EINVAL; |
2956 | ||
a3a92c31 DD |
2957 | if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit) |
2958 | return -EINVAL; | |
2959 | ||
f7784b8e MT |
2960 | return 0; |
2961 | } | |
2962 | ||
2963 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 2964 | const struct kvm_userspace_memory_region *mem, |
8482644a | 2965 | const struct kvm_memory_slot *old, |
f36f3f28 | 2966 | const struct kvm_memory_slot *new, |
8482644a | 2967 | enum kvm_mr_change change) |
f7784b8e | 2968 | { |
f7850c92 | 2969 | int rc; |
f7784b8e | 2970 | |
2cef4deb CB |
2971 | /* If the basics of the memslot do not change, we do not want |
2972 | * to update the gmap. Every update causes several unnecessary | |
2973 | * segment translation exceptions. This is usually handled just | |
2974 | * fine by the normal fault handler + gmap, but it will also | |
2975 | * cause faults on the prefix page of running guest CPUs. | |
2976 | */ | |
2977 | if (old->userspace_addr == mem->userspace_addr && | |
2978 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
2979 | old->npages * PAGE_SIZE == mem->memory_size) | |
2980 | return; | |
598841ca CO |
2981 | |
2982 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
2983 | mem->guest_phys_addr, mem->memory_size); | |
2984 | if (rc) | |
ea2cdd27 | 2985 | pr_warn("failed to commit memory region\n"); |
598841ca | 2986 | return; |
b0c632db HC |
2987 | } |
2988 | ||
60a37709 AY |
2989 | static inline unsigned long nonhyp_mask(int i) |
2990 | { | |
2991 | unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30; | |
2992 | ||
2993 | return 0x0000ffffffffffffUL >> (nonhyp_fai << 4); | |
2994 | } | |
2995 | ||
3491caf2 CB |
2996 | void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) |
2997 | { | |
2998 | vcpu->valid_wakeup = false; | |
2999 | } | |
3000 | ||
b0c632db HC |
3001 | static int __init kvm_s390_init(void) |
3002 | { | |
60a37709 AY |
3003 | int i; |
3004 | ||
07197fd0 DH |
3005 | if (!sclp.has_sief2) { |
3006 | pr_info("SIE not available\n"); | |
3007 | return -ENODEV; | |
3008 | } | |
3009 | ||
60a37709 AY |
3010 | for (i = 0; i < 16; i++) |
3011 | kvm_s390_fac_list_mask[i] |= | |
3012 | S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i); | |
3013 | ||
9d8d5786 | 3014 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
3015 | } |
3016 | ||
3017 | static void __exit kvm_s390_exit(void) | |
3018 | { | |
3019 | kvm_exit(); | |
3020 | } | |
3021 | ||
3022 | module_init(kvm_s390_init); | |
3023 | module_exit(kvm_s390_exit); | |
566af940 CH |
3024 | |
3025 | /* | |
3026 | * Enable autoloading of the kvm module. | |
3027 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
3028 | * since x86 takes a different approach. | |
3029 | */ | |
3030 | #include <linux/miscdevice.h> | |
3031 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
3032 | MODULE_ALIAS("devname:kvm"); |