Commit | Line | Data |
---|---|---|
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) }, |
ce2e4f0b | 68 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 69 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 70 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
71 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
72 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 73 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 74 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
75 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
76 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
77 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
78 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
79 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
80 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
81 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 82 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
83 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
84 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
85 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
86 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
87 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 88 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
89 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
90 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 91 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
92 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
93 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 94 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 95 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 96 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 97 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 98 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
99 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
100 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 101 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
102 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
103 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 104 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
105 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
106 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
107 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
108 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
109 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
110 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 111 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 112 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 113 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
175a5c9e CB |
114 | { "diagnose_258", VCPU_STAT(diagnose_258) }, |
115 | { "diagnose_308", VCPU_STAT(diagnose_308) }, | |
116 | { "diagnose_500", VCPU_STAT(diagnose_500) }, | |
b0c632db HC |
117 | { NULL } |
118 | }; | |
119 | ||
9d8d5786 MM |
120 | /* upper facilities limit for kvm */ |
121 | unsigned long kvm_s390_fac_list_mask[] = { | |
a3ed8dae | 122 | 0xffe6fffbfcfdfc40UL, |
53df84f8 | 123 | 0x005e800000000000UL, |
9d8d5786 | 124 | }; |
b0c632db | 125 | |
9d8d5786 | 126 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 127 | { |
9d8d5786 MM |
128 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
129 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
130 | } |
131 | ||
9d8d5786 | 132 | static struct gmap_notifier gmap_notifier; |
78f26131 | 133 | debug_info_t *kvm_s390_dbf; |
9d8d5786 | 134 | |
b0c632db | 135 | /* Section: not file related */ |
13a34e06 | 136 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
137 | { |
138 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 139 | return 0; |
b0c632db HC |
140 | } |
141 | ||
2c70fe44 CB |
142 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
143 | ||
fdf03650 FZ |
144 | /* |
145 | * This callback is executed during stop_machine(). All CPUs are therefore | |
146 | * temporarily stopped. In order not to change guest behavior, we have to | |
147 | * disable preemption whenever we touch the epoch of kvm and the VCPUs, | |
148 | * so a CPU won't be stopped while calculating with the epoch. | |
149 | */ | |
150 | static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, | |
151 | void *v) | |
152 | { | |
153 | struct kvm *kvm; | |
154 | struct kvm_vcpu *vcpu; | |
155 | int i; | |
156 | unsigned long long *delta = v; | |
157 | ||
158 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
159 | kvm->arch.epoch -= *delta; | |
160 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
161 | vcpu->arch.sie_block->epoch -= *delta; | |
db0758b2 DH |
162 | if (vcpu->arch.cputm_enabled) |
163 | vcpu->arch.cputm_start += *delta; | |
fdf03650 FZ |
164 | } |
165 | } | |
166 | return NOTIFY_OK; | |
167 | } | |
168 | ||
169 | static struct notifier_block kvm_clock_notifier = { | |
170 | .notifier_call = kvm_clock_sync, | |
171 | }; | |
172 | ||
b0c632db HC |
173 | int kvm_arch_hardware_setup(void) |
174 | { | |
2c70fe44 CB |
175 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
176 | gmap_register_ipte_notifier(&gmap_notifier); | |
fdf03650 FZ |
177 | atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
178 | &kvm_clock_notifier); | |
b0c632db HC |
179 | return 0; |
180 | } | |
181 | ||
182 | void kvm_arch_hardware_unsetup(void) | |
183 | { | |
2c70fe44 | 184 | gmap_unregister_ipte_notifier(&gmap_notifier); |
fdf03650 FZ |
185 | atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
186 | &kvm_clock_notifier); | |
b0c632db HC |
187 | } |
188 | ||
b0c632db HC |
189 | int kvm_arch_init(void *opaque) |
190 | { | |
78f26131 CB |
191 | kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
192 | if (!kvm_s390_dbf) | |
193 | return -ENOMEM; | |
194 | ||
195 | if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) { | |
196 | debug_unregister(kvm_s390_dbf); | |
197 | return -ENOMEM; | |
198 | } | |
199 | ||
84877d93 CH |
200 | /* Register floating interrupt controller interface. */ |
201 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
202 | } |
203 | ||
78f26131 CB |
204 | void kvm_arch_exit(void) |
205 | { | |
206 | debug_unregister(kvm_s390_dbf); | |
207 | } | |
208 | ||
b0c632db HC |
209 | /* Section: device related */ |
210 | long kvm_arch_dev_ioctl(struct file *filp, | |
211 | unsigned int ioctl, unsigned long arg) | |
212 | { | |
213 | if (ioctl == KVM_S390_ENABLE_SIE) | |
214 | return s390_enable_sie(); | |
215 | return -EINVAL; | |
216 | } | |
217 | ||
784aa3d7 | 218 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 219 | { |
d7b0b5eb CO |
220 | int r; |
221 | ||
2bd0ac4e | 222 | switch (ext) { |
d7b0b5eb | 223 | case KVM_CAP_S390_PSW: |
b6cf8788 | 224 | case KVM_CAP_S390_GMAP: |
52e16b18 | 225 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
226 | #ifdef CONFIG_KVM_S390_UCONTROL |
227 | case KVM_CAP_S390_UCONTROL: | |
228 | #endif | |
3c038e6b | 229 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 230 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 231 | case KVM_CAP_ONE_REG: |
d6712df9 | 232 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 233 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 234 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 235 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 236 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 237 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 238 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 239 | case KVM_CAP_MP_STATE: |
47b43c52 | 240 | case KVM_CAP_S390_INJECT_IRQ: |
2444b352 | 241 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 242 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 243 | case KVM_CAP_S390_SKEYS: |
816c7667 | 244 | case KVM_CAP_S390_IRQ_STATE: |
d7b0b5eb CO |
245 | r = 1; |
246 | break; | |
41408c28 TH |
247 | case KVM_CAP_S390_MEM_OP: |
248 | r = MEM_OP_MAX_SIZE; | |
249 | break; | |
e726b1bd CB |
250 | case KVM_CAP_NR_VCPUS: |
251 | case KVM_CAP_MAX_VCPUS: | |
fe0edcb7 ED |
252 | r = sclp.has_esca ? KVM_S390_ESCA_CPU_SLOTS |
253 | : KVM_S390_BSCA_CPU_SLOTS; | |
e726b1bd | 254 | break; |
e1e2e605 NW |
255 | case KVM_CAP_NR_MEMSLOTS: |
256 | r = KVM_USER_MEM_SLOTS; | |
257 | break; | |
1526bf9c | 258 | case KVM_CAP_S390_COW: |
abf09bed | 259 | r = MACHINE_HAS_ESOP; |
1526bf9c | 260 | break; |
68c55750 EF |
261 | case KVM_CAP_S390_VECTOR_REGISTERS: |
262 | r = MACHINE_HAS_VX; | |
263 | break; | |
c6e5f166 FZ |
264 | case KVM_CAP_S390_RI: |
265 | r = test_facility(64); | |
266 | break; | |
2bd0ac4e | 267 | default: |
d7b0b5eb | 268 | r = 0; |
2bd0ac4e | 269 | } |
d7b0b5eb | 270 | return r; |
b0c632db HC |
271 | } |
272 | ||
15f36ebd JH |
273 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
274 | struct kvm_memory_slot *memslot) | |
275 | { | |
276 | gfn_t cur_gfn, last_gfn; | |
277 | unsigned long address; | |
278 | struct gmap *gmap = kvm->arch.gmap; | |
279 | ||
15f36ebd JH |
280 | /* Loop over all guest pages */ |
281 | last_gfn = memslot->base_gfn + memslot->npages; | |
282 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
283 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
284 | ||
1e133ab2 | 285 | if (test_and_clear_guest_dirty(gmap->mm, address)) |
15f36ebd | 286 | mark_page_dirty(kvm, cur_gfn); |
1763f8d0 CB |
287 | if (fatal_signal_pending(current)) |
288 | return; | |
70c88a00 | 289 | cond_resched(); |
15f36ebd | 290 | } |
15f36ebd JH |
291 | } |
292 | ||
b0c632db | 293 | /* Section: vm related */ |
a6e2f683 ED |
294 | static void sca_del_vcpu(struct kvm_vcpu *vcpu); |
295 | ||
b0c632db HC |
296 | /* |
297 | * Get (and clear) the dirty memory log for a memory slot. | |
298 | */ | |
299 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
300 | struct kvm_dirty_log *log) | |
301 | { | |
15f36ebd JH |
302 | int r; |
303 | unsigned long n; | |
9f6b8029 | 304 | struct kvm_memslots *slots; |
15f36ebd JH |
305 | struct kvm_memory_slot *memslot; |
306 | int is_dirty = 0; | |
307 | ||
308 | mutex_lock(&kvm->slots_lock); | |
309 | ||
310 | r = -EINVAL; | |
311 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
312 | goto out; | |
313 | ||
9f6b8029 PB |
314 | slots = kvm_memslots(kvm); |
315 | memslot = id_to_memslot(slots, log->slot); | |
15f36ebd JH |
316 | r = -ENOENT; |
317 | if (!memslot->dirty_bitmap) | |
318 | goto out; | |
319 | ||
320 | kvm_s390_sync_dirty_log(kvm, memslot); | |
321 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
322 | if (r) | |
323 | goto out; | |
324 | ||
325 | /* Clear the dirty log */ | |
326 | if (is_dirty) { | |
327 | n = kvm_dirty_bitmap_bytes(memslot); | |
328 | memset(memslot->dirty_bitmap, 0, n); | |
329 | } | |
330 | r = 0; | |
331 | out: | |
332 | mutex_unlock(&kvm->slots_lock); | |
333 | return r; | |
b0c632db HC |
334 | } |
335 | ||
d938dc55 CH |
336 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
337 | { | |
338 | int r; | |
339 | ||
340 | if (cap->flags) | |
341 | return -EINVAL; | |
342 | ||
343 | switch (cap->cap) { | |
84223598 | 344 | case KVM_CAP_S390_IRQCHIP: |
c92ea7b9 | 345 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
84223598 CH |
346 | kvm->arch.use_irqchip = 1; |
347 | r = 0; | |
348 | break; | |
2444b352 | 349 | case KVM_CAP_S390_USER_SIGP: |
c92ea7b9 | 350 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
2444b352 DH |
351 | kvm->arch.user_sigp = 1; |
352 | r = 0; | |
353 | break; | |
68c55750 | 354 | case KVM_CAP_S390_VECTOR_REGISTERS: |
5967c17b DH |
355 | mutex_lock(&kvm->lock); |
356 | if (atomic_read(&kvm->online_vcpus)) { | |
357 | r = -EBUSY; | |
358 | } else if (MACHINE_HAS_VX) { | |
c54f0d6a DH |
359 | set_kvm_facility(kvm->arch.model.fac_mask, 129); |
360 | set_kvm_facility(kvm->arch.model.fac_list, 129); | |
18280d8b MM |
361 | r = 0; |
362 | } else | |
363 | r = -EINVAL; | |
5967c17b | 364 | mutex_unlock(&kvm->lock); |
c92ea7b9 CB |
365 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
366 | r ? "(not available)" : "(success)"); | |
68c55750 | 367 | break; |
c6e5f166 FZ |
368 | case KVM_CAP_S390_RI: |
369 | r = -EINVAL; | |
370 | mutex_lock(&kvm->lock); | |
371 | if (atomic_read(&kvm->online_vcpus)) { | |
372 | r = -EBUSY; | |
373 | } else if (test_facility(64)) { | |
c54f0d6a DH |
374 | set_kvm_facility(kvm->arch.model.fac_mask, 64); |
375 | set_kvm_facility(kvm->arch.model.fac_list, 64); | |
c6e5f166 FZ |
376 | r = 0; |
377 | } | |
378 | mutex_unlock(&kvm->lock); | |
379 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s", | |
380 | r ? "(not available)" : "(success)"); | |
381 | break; | |
e44fc8c9 | 382 | case KVM_CAP_S390_USER_STSI: |
c92ea7b9 | 383 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
e44fc8c9 ET |
384 | kvm->arch.user_stsi = 1; |
385 | r = 0; | |
386 | break; | |
d938dc55 CH |
387 | default: |
388 | r = -EINVAL; | |
389 | break; | |
390 | } | |
391 | return r; | |
392 | } | |
393 | ||
8c0a7ce6 DD |
394 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
395 | { | |
396 | int ret; | |
397 | ||
398 | switch (attr->attr) { | |
399 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
400 | ret = 0; | |
c92ea7b9 | 401 | VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
a3a92c31 DD |
402 | kvm->arch.mem_limit); |
403 | if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr)) | |
8c0a7ce6 DD |
404 | ret = -EFAULT; |
405 | break; | |
406 | default: | |
407 | ret = -ENXIO; | |
408 | break; | |
409 | } | |
410 | return ret; | |
411 | } | |
412 | ||
413 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
414 | { |
415 | int ret; | |
416 | unsigned int idx; | |
417 | switch (attr->attr) { | |
418 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
e6db1d61 DD |
419 | /* enable CMMA only for z10 and later (EDAT_1) */ |
420 | ret = -EINVAL; | |
421 | if (!MACHINE_IS_LPAR || !MACHINE_HAS_EDAT1) | |
422 | break; | |
423 | ||
4f718eab | 424 | ret = -EBUSY; |
c92ea7b9 | 425 | VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
4f718eab DD |
426 | mutex_lock(&kvm->lock); |
427 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
428 | kvm->arch.use_cmma = 1; | |
429 | ret = 0; | |
430 | } | |
431 | mutex_unlock(&kvm->lock); | |
432 | break; | |
433 | case KVM_S390_VM_MEM_CLR_CMMA: | |
c3489155 DD |
434 | ret = -EINVAL; |
435 | if (!kvm->arch.use_cmma) | |
436 | break; | |
437 | ||
c92ea7b9 | 438 | VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
4f718eab DD |
439 | mutex_lock(&kvm->lock); |
440 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 441 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
442 | srcu_read_unlock(&kvm->srcu, idx); |
443 | mutex_unlock(&kvm->lock); | |
444 | ret = 0; | |
445 | break; | |
8c0a7ce6 DD |
446 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
447 | unsigned long new_limit; | |
448 | ||
449 | if (kvm_is_ucontrol(kvm)) | |
450 | return -EINVAL; | |
451 | ||
452 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
453 | return -EFAULT; | |
454 | ||
a3a92c31 DD |
455 | if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT && |
456 | new_limit > kvm->arch.mem_limit) | |
8c0a7ce6 DD |
457 | return -E2BIG; |
458 | ||
a3a92c31 DD |
459 | if (!new_limit) |
460 | return -EINVAL; | |
461 | ||
462 | /* gmap_alloc takes last usable address */ | |
463 | if (new_limit != KVM_S390_NO_MEM_LIMIT) | |
464 | new_limit -= 1; | |
465 | ||
8c0a7ce6 DD |
466 | ret = -EBUSY; |
467 | mutex_lock(&kvm->lock); | |
468 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
469 | /* gmap_alloc will round the limit up */ | |
470 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
471 | ||
472 | if (!new) { | |
473 | ret = -ENOMEM; | |
474 | } else { | |
475 | gmap_free(kvm->arch.gmap); | |
476 | new->private = kvm; | |
477 | kvm->arch.gmap = new; | |
478 | ret = 0; | |
479 | } | |
480 | } | |
481 | mutex_unlock(&kvm->lock); | |
a3a92c31 DD |
482 | VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit); |
483 | VM_EVENT(kvm, 3, "New guest asce: 0x%pK", | |
484 | (void *) kvm->arch.gmap->asce); | |
8c0a7ce6 DD |
485 | break; |
486 | } | |
4f718eab DD |
487 | default: |
488 | ret = -ENXIO; | |
489 | break; | |
490 | } | |
491 | return ret; | |
492 | } | |
493 | ||
a374e892 TK |
494 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
495 | ||
496 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
497 | { | |
498 | struct kvm_vcpu *vcpu; | |
499 | int i; | |
500 | ||
9d8d5786 | 501 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
502 | return -EINVAL; |
503 | ||
504 | mutex_lock(&kvm->lock); | |
505 | switch (attr->attr) { | |
506 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
507 | get_random_bytes( | |
508 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
509 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
510 | kvm->arch.crypto.aes_kw = 1; | |
c92ea7b9 | 511 | VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
a374e892 TK |
512 | break; |
513 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
514 | get_random_bytes( | |
515 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
516 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
517 | kvm->arch.crypto.dea_kw = 1; | |
c92ea7b9 | 518 | VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
a374e892 TK |
519 | break; |
520 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
521 | kvm->arch.crypto.aes_kw = 0; | |
522 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
523 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
c92ea7b9 | 524 | VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
a374e892 TK |
525 | break; |
526 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
527 | kvm->arch.crypto.dea_kw = 0; | |
528 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
529 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
c92ea7b9 | 530 | VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
a374e892 TK |
531 | break; |
532 | default: | |
533 | mutex_unlock(&kvm->lock); | |
534 | return -ENXIO; | |
535 | } | |
536 | ||
537 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
538 | kvm_s390_vcpu_crypto_setup(vcpu); | |
539 | exit_sie(vcpu); | |
540 | } | |
541 | mutex_unlock(&kvm->lock); | |
542 | return 0; | |
543 | } | |
544 | ||
72f25020 JH |
545 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
546 | { | |
547 | u8 gtod_high; | |
548 | ||
549 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
550 | sizeof(gtod_high))) | |
551 | return -EFAULT; | |
552 | ||
553 | if (gtod_high != 0) | |
554 | return -EINVAL; | |
58c383c6 | 555 | VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
556 | |
557 | return 0; | |
558 | } | |
559 | ||
560 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
561 | { | |
5a3d883a | 562 | u64 gtod; |
72f25020 JH |
563 | |
564 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
565 | return -EFAULT; | |
566 | ||
25ed1675 | 567 | kvm_s390_set_tod_clock(kvm, gtod); |
58c383c6 | 568 | VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod); |
72f25020 JH |
569 | return 0; |
570 | } | |
571 | ||
572 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
573 | { | |
574 | int ret; | |
575 | ||
576 | if (attr->flags) | |
577 | return -EINVAL; | |
578 | ||
579 | switch (attr->attr) { | |
580 | case KVM_S390_VM_TOD_HIGH: | |
581 | ret = kvm_s390_set_tod_high(kvm, attr); | |
582 | break; | |
583 | case KVM_S390_VM_TOD_LOW: | |
584 | ret = kvm_s390_set_tod_low(kvm, attr); | |
585 | break; | |
586 | default: | |
587 | ret = -ENXIO; | |
588 | break; | |
589 | } | |
590 | return ret; | |
591 | } | |
592 | ||
593 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
594 | { | |
595 | u8 gtod_high = 0; | |
596 | ||
597 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
598 | sizeof(gtod_high))) | |
599 | return -EFAULT; | |
58c383c6 | 600 | VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
601 | |
602 | return 0; | |
603 | } | |
604 | ||
605 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
606 | { | |
5a3d883a | 607 | u64 gtod; |
72f25020 | 608 | |
60417fcc | 609 | gtod = kvm_s390_get_tod_clock_fast(kvm); |
72f25020 JH |
610 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
611 | return -EFAULT; | |
58c383c6 | 612 | VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
72f25020 JH |
613 | |
614 | return 0; | |
615 | } | |
616 | ||
617 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
618 | { | |
619 | int ret; | |
620 | ||
621 | if (attr->flags) | |
622 | return -EINVAL; | |
623 | ||
624 | switch (attr->attr) { | |
625 | case KVM_S390_VM_TOD_HIGH: | |
626 | ret = kvm_s390_get_tod_high(kvm, attr); | |
627 | break; | |
628 | case KVM_S390_VM_TOD_LOW: | |
629 | ret = kvm_s390_get_tod_low(kvm, attr); | |
630 | break; | |
631 | default: | |
632 | ret = -ENXIO; | |
633 | break; | |
634 | } | |
635 | return ret; | |
636 | } | |
637 | ||
658b6eda MM |
638 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
639 | { | |
640 | struct kvm_s390_vm_cpu_processor *proc; | |
641 | int ret = 0; | |
642 | ||
643 | mutex_lock(&kvm->lock); | |
644 | if (atomic_read(&kvm->online_vcpus)) { | |
645 | ret = -EBUSY; | |
646 | goto out; | |
647 | } | |
648 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
649 | if (!proc) { | |
650 | ret = -ENOMEM; | |
651 | goto out; | |
652 | } | |
653 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
654 | sizeof(*proc))) { | |
655 | memcpy(&kvm->arch.model.cpu_id, &proc->cpuid, | |
656 | sizeof(struct cpuid)); | |
657 | kvm->arch.model.ibc = proc->ibc; | |
c54f0d6a | 658 | memcpy(kvm->arch.model.fac_list, proc->fac_list, |
658b6eda MM |
659 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
660 | } else | |
661 | ret = -EFAULT; | |
662 | kfree(proc); | |
663 | out: | |
664 | mutex_unlock(&kvm->lock); | |
665 | return ret; | |
666 | } | |
667 | ||
668 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
669 | { | |
670 | int ret = -ENXIO; | |
671 | ||
672 | switch (attr->attr) { | |
673 | case KVM_S390_VM_CPU_PROCESSOR: | |
674 | ret = kvm_s390_set_processor(kvm, attr); | |
675 | break; | |
676 | } | |
677 | return ret; | |
678 | } | |
679 | ||
680 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
681 | { | |
682 | struct kvm_s390_vm_cpu_processor *proc; | |
683 | int ret = 0; | |
684 | ||
685 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
686 | if (!proc) { | |
687 | ret = -ENOMEM; | |
688 | goto out; | |
689 | } | |
690 | memcpy(&proc->cpuid, &kvm->arch.model.cpu_id, sizeof(struct cpuid)); | |
691 | proc->ibc = kvm->arch.model.ibc; | |
c54f0d6a DH |
692 | memcpy(&proc->fac_list, kvm->arch.model.fac_list, |
693 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda MM |
694 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
695 | ret = -EFAULT; | |
696 | kfree(proc); | |
697 | out: | |
698 | return ret; | |
699 | } | |
700 | ||
701 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
702 | { | |
703 | struct kvm_s390_vm_cpu_machine *mach; | |
704 | int ret = 0; | |
705 | ||
706 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
707 | if (!mach) { | |
708 | ret = -ENOMEM; | |
709 | goto out; | |
710 | } | |
711 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 712 | mach->ibc = sclp.ibc; |
c54f0d6a | 713 | memcpy(&mach->fac_mask, kvm->arch.model.fac_mask, |
981467c9 | 714 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda | 715 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 716 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
717 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
718 | ret = -EFAULT; | |
719 | kfree(mach); | |
720 | out: | |
721 | return ret; | |
722 | } | |
723 | ||
724 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
725 | { | |
726 | int ret = -ENXIO; | |
727 | ||
728 | switch (attr->attr) { | |
729 | case KVM_S390_VM_CPU_PROCESSOR: | |
730 | ret = kvm_s390_get_processor(kvm, attr); | |
731 | break; | |
732 | case KVM_S390_VM_CPU_MACHINE: | |
733 | ret = kvm_s390_get_machine(kvm, attr); | |
734 | break; | |
735 | } | |
736 | return ret; | |
737 | } | |
738 | ||
f2061656 DD |
739 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
740 | { | |
741 | int ret; | |
742 | ||
743 | switch (attr->group) { | |
4f718eab | 744 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 745 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 746 | break; |
72f25020 JH |
747 | case KVM_S390_VM_TOD: |
748 | ret = kvm_s390_set_tod(kvm, attr); | |
749 | break; | |
658b6eda MM |
750 | case KVM_S390_VM_CPU_MODEL: |
751 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
752 | break; | |
a374e892 TK |
753 | case KVM_S390_VM_CRYPTO: |
754 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
755 | break; | |
f2061656 DD |
756 | default: |
757 | ret = -ENXIO; | |
758 | break; | |
759 | } | |
760 | ||
761 | return ret; | |
762 | } | |
763 | ||
764 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
765 | { | |
8c0a7ce6 DD |
766 | int ret; |
767 | ||
768 | switch (attr->group) { | |
769 | case KVM_S390_VM_MEM_CTRL: | |
770 | ret = kvm_s390_get_mem_control(kvm, attr); | |
771 | break; | |
72f25020 JH |
772 | case KVM_S390_VM_TOD: |
773 | ret = kvm_s390_get_tod(kvm, attr); | |
774 | break; | |
658b6eda MM |
775 | case KVM_S390_VM_CPU_MODEL: |
776 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
777 | break; | |
8c0a7ce6 DD |
778 | default: |
779 | ret = -ENXIO; | |
780 | break; | |
781 | } | |
782 | ||
783 | return ret; | |
f2061656 DD |
784 | } |
785 | ||
786 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
787 | { | |
788 | int ret; | |
789 | ||
790 | switch (attr->group) { | |
4f718eab DD |
791 | case KVM_S390_VM_MEM_CTRL: |
792 | switch (attr->attr) { | |
793 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
794 | case KVM_S390_VM_MEM_CLR_CMMA: | |
8c0a7ce6 | 795 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
796 | ret = 0; |
797 | break; | |
798 | default: | |
799 | ret = -ENXIO; | |
800 | break; | |
801 | } | |
802 | break; | |
72f25020 JH |
803 | case KVM_S390_VM_TOD: |
804 | switch (attr->attr) { | |
805 | case KVM_S390_VM_TOD_LOW: | |
806 | case KVM_S390_VM_TOD_HIGH: | |
807 | ret = 0; | |
808 | break; | |
809 | default: | |
810 | ret = -ENXIO; | |
811 | break; | |
812 | } | |
813 | break; | |
658b6eda MM |
814 | case KVM_S390_VM_CPU_MODEL: |
815 | switch (attr->attr) { | |
816 | case KVM_S390_VM_CPU_PROCESSOR: | |
817 | case KVM_S390_VM_CPU_MACHINE: | |
818 | ret = 0; | |
819 | break; | |
820 | default: | |
821 | ret = -ENXIO; | |
822 | break; | |
823 | } | |
824 | break; | |
a374e892 TK |
825 | case KVM_S390_VM_CRYPTO: |
826 | switch (attr->attr) { | |
827 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
828 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
829 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
830 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
831 | ret = 0; | |
832 | break; | |
833 | default: | |
834 | ret = -ENXIO; | |
835 | break; | |
836 | } | |
837 | break; | |
f2061656 DD |
838 | default: |
839 | ret = -ENXIO; | |
840 | break; | |
841 | } | |
842 | ||
843 | return ret; | |
844 | } | |
845 | ||
30ee2a98 JH |
846 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
847 | { | |
848 | uint8_t *keys; | |
849 | uint64_t hva; | |
850 | unsigned long curkey; | |
851 | int i, r = 0; | |
852 | ||
853 | if (args->flags != 0) | |
854 | return -EINVAL; | |
855 | ||
856 | /* Is this guest using storage keys? */ | |
857 | if (!mm_use_skey(current->mm)) | |
858 | return KVM_S390_GET_SKEYS_NONE; | |
859 | ||
860 | /* Enforce sane limit on memory allocation */ | |
861 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
862 | return -EINVAL; | |
863 | ||
864 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
865 | GFP_KERNEL | __GFP_NOWARN); | |
866 | if (!keys) | |
867 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
868 | if (!keys) | |
869 | return -ENOMEM; | |
870 | ||
871 | for (i = 0; i < args->count; i++) { | |
872 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
873 | if (kvm_is_error_hva(hva)) { | |
874 | r = -EFAULT; | |
875 | goto out; | |
876 | } | |
877 | ||
878 | curkey = get_guest_storage_key(current->mm, hva); | |
879 | if (IS_ERR_VALUE(curkey)) { | |
880 | r = curkey; | |
881 | goto out; | |
882 | } | |
883 | keys[i] = curkey; | |
884 | } | |
885 | ||
886 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
887 | sizeof(uint8_t) * args->count); | |
888 | if (r) | |
889 | r = -EFAULT; | |
890 | out: | |
891 | kvfree(keys); | |
892 | return r; | |
893 | } | |
894 | ||
895 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
896 | { | |
897 | uint8_t *keys; | |
898 | uint64_t hva; | |
899 | int i, r = 0; | |
900 | ||
901 | if (args->flags != 0) | |
902 | return -EINVAL; | |
903 | ||
904 | /* Enforce sane limit on memory allocation */ | |
905 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
906 | return -EINVAL; | |
907 | ||
908 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
909 | GFP_KERNEL | __GFP_NOWARN); | |
910 | if (!keys) | |
911 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
912 | if (!keys) | |
913 | return -ENOMEM; | |
914 | ||
915 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
916 | sizeof(uint8_t) * args->count); | |
917 | if (r) { | |
918 | r = -EFAULT; | |
919 | goto out; | |
920 | } | |
921 | ||
922 | /* Enable storage key handling for the guest */ | |
14d4a425 DD |
923 | r = s390_enable_skey(); |
924 | if (r) | |
925 | goto out; | |
30ee2a98 JH |
926 | |
927 | for (i = 0; i < args->count; i++) { | |
928 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
929 | if (kvm_is_error_hva(hva)) { | |
930 | r = -EFAULT; | |
931 | goto out; | |
932 | } | |
933 | ||
934 | /* Lowest order bit is reserved */ | |
935 | if (keys[i] & 0x01) { | |
936 | r = -EINVAL; | |
937 | goto out; | |
938 | } | |
939 | ||
940 | r = set_guest_storage_key(current->mm, hva, | |
941 | (unsigned long)keys[i], 0); | |
942 | if (r) | |
943 | goto out; | |
944 | } | |
945 | out: | |
946 | kvfree(keys); | |
947 | return r; | |
948 | } | |
949 | ||
b0c632db HC |
950 | long kvm_arch_vm_ioctl(struct file *filp, |
951 | unsigned int ioctl, unsigned long arg) | |
952 | { | |
953 | struct kvm *kvm = filp->private_data; | |
954 | void __user *argp = (void __user *)arg; | |
f2061656 | 955 | struct kvm_device_attr attr; |
b0c632db HC |
956 | int r; |
957 | ||
958 | switch (ioctl) { | |
ba5c1e9b CO |
959 | case KVM_S390_INTERRUPT: { |
960 | struct kvm_s390_interrupt s390int; | |
961 | ||
962 | r = -EFAULT; | |
963 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
964 | break; | |
965 | r = kvm_s390_inject_vm(kvm, &s390int); | |
966 | break; | |
967 | } | |
d938dc55 CH |
968 | case KVM_ENABLE_CAP: { |
969 | struct kvm_enable_cap cap; | |
970 | r = -EFAULT; | |
971 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
972 | break; | |
973 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
974 | break; | |
975 | } | |
84223598 CH |
976 | case KVM_CREATE_IRQCHIP: { |
977 | struct kvm_irq_routing_entry routing; | |
978 | ||
979 | r = -EINVAL; | |
980 | if (kvm->arch.use_irqchip) { | |
981 | /* Set up dummy routing. */ | |
982 | memset(&routing, 0, sizeof(routing)); | |
152b2839 | 983 | r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
84223598 CH |
984 | } |
985 | break; | |
986 | } | |
f2061656 DD |
987 | case KVM_SET_DEVICE_ATTR: { |
988 | r = -EFAULT; | |
989 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
990 | break; | |
991 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
992 | break; | |
993 | } | |
994 | case KVM_GET_DEVICE_ATTR: { | |
995 | r = -EFAULT; | |
996 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
997 | break; | |
998 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
999 | break; | |
1000 | } | |
1001 | case KVM_HAS_DEVICE_ATTR: { | |
1002 | r = -EFAULT; | |
1003 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1004 | break; | |
1005 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
1006 | break; | |
1007 | } | |
30ee2a98 JH |
1008 | case KVM_S390_GET_SKEYS: { |
1009 | struct kvm_s390_skeys args; | |
1010 | ||
1011 | r = -EFAULT; | |
1012 | if (copy_from_user(&args, argp, | |
1013 | sizeof(struct kvm_s390_skeys))) | |
1014 | break; | |
1015 | r = kvm_s390_get_skeys(kvm, &args); | |
1016 | break; | |
1017 | } | |
1018 | case KVM_S390_SET_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_set_skeys(kvm, &args); | |
1026 | break; | |
1027 | } | |
b0c632db | 1028 | default: |
367e1319 | 1029 | r = -ENOTTY; |
b0c632db HC |
1030 | } |
1031 | ||
1032 | return r; | |
1033 | } | |
1034 | ||
45c9b47c TK |
1035 | static int kvm_s390_query_ap_config(u8 *config) |
1036 | { | |
1037 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 1038 | u32 cc = 0; |
45c9b47c | 1039 | |
86044c8c | 1040 | memset(config, 0, 128); |
45c9b47c TK |
1041 | asm volatile( |
1042 | "lgr 0,%1\n" | |
1043 | "lgr 2,%2\n" | |
1044 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 1045 | "0: ipm %0\n" |
45c9b47c | 1046 | "srl %0,28\n" |
86044c8c CB |
1047 | "1:\n" |
1048 | EX_TABLE(0b, 1b) | |
1049 | : "+r" (cc) | |
45c9b47c TK |
1050 | : "r" (fcn_code), "r" (config) |
1051 | : "cc", "0", "2", "memory" | |
1052 | ); | |
1053 | ||
1054 | return cc; | |
1055 | } | |
1056 | ||
1057 | static int kvm_s390_apxa_installed(void) | |
1058 | { | |
1059 | u8 config[128]; | |
1060 | int cc; | |
1061 | ||
a6aacc3f | 1062 | if (test_facility(12)) { |
45c9b47c TK |
1063 | cc = kvm_s390_query_ap_config(config); |
1064 | ||
1065 | if (cc) | |
1066 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
1067 | else | |
1068 | return config[0] & 0x40; | |
1069 | } | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
1075 | { | |
1076 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
1077 | ||
1078 | if (kvm_s390_apxa_installed()) | |
1079 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
1080 | else | |
1081 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
1082 | } | |
1083 | ||
9d8d5786 MM |
1084 | static void kvm_s390_get_cpu_id(struct cpuid *cpu_id) |
1085 | { | |
1086 | get_cpu_id(cpu_id); | |
1087 | cpu_id->version = 0xff; | |
1088 | } | |
1089 | ||
c54f0d6a | 1090 | static void kvm_s390_crypto_init(struct kvm *kvm) |
5102ee87 | 1091 | { |
9d8d5786 | 1092 | if (!test_kvm_facility(kvm, 76)) |
c54f0d6a | 1093 | return; |
5102ee87 | 1094 | |
c54f0d6a | 1095 | kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; |
45c9b47c | 1096 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1097 | |
ed6f76b4 TK |
1098 | /* Enable AES/DEA protected key functions by default */ |
1099 | kvm->arch.crypto.aes_kw = 1; | |
1100 | kvm->arch.crypto.dea_kw = 1; | |
1101 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1102 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1103 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1104 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
5102ee87 TK |
1105 | } |
1106 | ||
7d43bafc ED |
1107 | static void sca_dispose(struct kvm *kvm) |
1108 | { | |
1109 | if (kvm->arch.use_esca) | |
5e044315 | 1110 | free_pages_exact(kvm->arch.sca, sizeof(struct esca_block)); |
7d43bafc ED |
1111 | else |
1112 | free_page((unsigned long)(kvm->arch.sca)); | |
1113 | kvm->arch.sca = NULL; | |
1114 | } | |
1115 | ||
e08b9637 | 1116 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1117 | { |
9d8d5786 | 1118 | int i, rc; |
b0c632db | 1119 | char debug_name[16]; |
f6c137ff | 1120 | static unsigned long sca_offset; |
b0c632db | 1121 | |
e08b9637 CO |
1122 | rc = -EINVAL; |
1123 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1124 | if (type & ~KVM_VM_S390_UCONTROL) | |
1125 | goto out_err; | |
1126 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1127 | goto out_err; | |
1128 | #else | |
1129 | if (type) | |
1130 | goto out_err; | |
1131 | #endif | |
1132 | ||
b0c632db HC |
1133 | rc = s390_enable_sie(); |
1134 | if (rc) | |
d89f5eff | 1135 | goto out_err; |
b0c632db | 1136 | |
b290411a CO |
1137 | rc = -ENOMEM; |
1138 | ||
7d43bafc | 1139 | kvm->arch.use_esca = 0; /* start with basic SCA */ |
5e044315 | 1140 | rwlock_init(&kvm->arch.sca_lock); |
bc784cce | 1141 | kvm->arch.sca = (struct bsca_block *) get_zeroed_page(GFP_KERNEL); |
b0c632db | 1142 | if (!kvm->arch.sca) |
d89f5eff | 1143 | goto out_err; |
f6c137ff | 1144 | spin_lock(&kvm_lock); |
c5c2c393 | 1145 | sca_offset += 16; |
bc784cce | 1146 | if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE) |
c5c2c393 | 1147 | sca_offset = 0; |
bc784cce ED |
1148 | kvm->arch.sca = (struct bsca_block *) |
1149 | ((char *) kvm->arch.sca + sca_offset); | |
f6c137ff | 1150 | spin_unlock(&kvm_lock); |
b0c632db HC |
1151 | |
1152 | sprintf(debug_name, "kvm-%u", current->pid); | |
1153 | ||
1cb9cf72 | 1154 | kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
b0c632db | 1155 | if (!kvm->arch.dbf) |
40f5b735 | 1156 | goto out_err; |
b0c632db | 1157 | |
c54f0d6a DH |
1158 | kvm->arch.sie_page2 = |
1159 | (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1160 | if (!kvm->arch.sie_page2) | |
40f5b735 | 1161 | goto out_err; |
9d8d5786 | 1162 | |
fb5bf93f | 1163 | /* Populate the facility mask initially. */ |
c54f0d6a | 1164 | memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 1165 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
1166 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1167 | if (i < kvm_s390_fac_list_mask_size()) | |
c54f0d6a | 1168 | kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1169 | else |
c54f0d6a | 1170 | kvm->arch.model.fac_mask[i] = 0UL; |
9d8d5786 MM |
1171 | } |
1172 | ||
981467c9 | 1173 | /* Populate the facility list initially. */ |
c54f0d6a DH |
1174 | kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list; |
1175 | memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask, | |
981467c9 MM |
1176 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
1177 | ||
9d8d5786 | 1178 | kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id); |
37c5f6c8 | 1179 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1180 | |
c54f0d6a | 1181 | kvm_s390_crypto_init(kvm); |
5102ee87 | 1182 | |
ba5c1e9b | 1183 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1184 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1185 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1186 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1187 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1188 | |
b0c632db | 1189 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
78f26131 | 1190 | VM_EVENT(kvm, 3, "vm created with type %lu", type); |
b0c632db | 1191 | |
e08b9637 CO |
1192 | if (type & KVM_VM_S390_UCONTROL) { |
1193 | kvm->arch.gmap = NULL; | |
a3a92c31 | 1194 | kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT; |
e08b9637 | 1195 | } else { |
32e6b236 GH |
1196 | if (sclp.hamax == U64_MAX) |
1197 | kvm->arch.mem_limit = TASK_MAX_SIZE; | |
1198 | else | |
1199 | kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE, | |
1200 | sclp.hamax + 1); | |
a3a92c31 | 1201 | kvm->arch.gmap = gmap_alloc(current->mm, kvm->arch.mem_limit - 1); |
e08b9637 | 1202 | if (!kvm->arch.gmap) |
40f5b735 | 1203 | goto out_err; |
2c70fe44 | 1204 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1205 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1206 | } |
fa6b7fe9 CH |
1207 | |
1208 | kvm->arch.css_support = 0; | |
84223598 | 1209 | kvm->arch.use_irqchip = 0; |
72f25020 | 1210 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1211 | |
8ad35755 | 1212 | spin_lock_init(&kvm->arch.start_stop_lock); |
8335713a | 1213 | KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid); |
8ad35755 | 1214 | |
d89f5eff | 1215 | return 0; |
40f5b735 | 1216 | out_err: |
c54f0d6a | 1217 | free_page((unsigned long)kvm->arch.sie_page2); |
598841ca | 1218 | debug_unregister(kvm->arch.dbf); |
7d43bafc | 1219 | sca_dispose(kvm); |
78f26131 | 1220 | KVM_EVENT(3, "creation of vm failed: %d", rc); |
d89f5eff | 1221 | return rc; |
b0c632db HC |
1222 | } |
1223 | ||
d329c035 CB |
1224 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1225 | { | |
1226 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1227 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1228 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1229 | kvm_clear_async_pf_completion_queue(vcpu); |
bc784cce | 1230 | if (!kvm_is_ucontrol(vcpu->kvm)) |
a6e2f683 | 1231 | sca_del_vcpu(vcpu); |
27e0393f CO |
1232 | |
1233 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1234 | gmap_free(vcpu->arch.gmap); | |
1235 | ||
e6db1d61 | 1236 | if (vcpu->kvm->arch.use_cmma) |
b31605c1 | 1237 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
d329c035 | 1238 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1239 | |
6692cef3 | 1240 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1241 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1242 | } |
1243 | ||
1244 | static void kvm_free_vcpus(struct kvm *kvm) | |
1245 | { | |
1246 | unsigned int i; | |
988a2cae | 1247 | struct kvm_vcpu *vcpu; |
d329c035 | 1248 | |
988a2cae GN |
1249 | kvm_for_each_vcpu(i, vcpu, kvm) |
1250 | kvm_arch_vcpu_destroy(vcpu); | |
1251 | ||
1252 | mutex_lock(&kvm->lock); | |
1253 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1254 | kvm->vcpus[i] = NULL; | |
1255 | ||
1256 | atomic_set(&kvm->online_vcpus, 0); | |
1257 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1258 | } |
1259 | ||
b0c632db HC |
1260 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1261 | { | |
d329c035 | 1262 | kvm_free_vcpus(kvm); |
7d43bafc | 1263 | sca_dispose(kvm); |
d329c035 | 1264 | debug_unregister(kvm->arch.dbf); |
c54f0d6a | 1265 | free_page((unsigned long)kvm->arch.sie_page2); |
27e0393f CO |
1266 | if (!kvm_is_ucontrol(kvm)) |
1267 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 1268 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1269 | kvm_s390_clear_float_irqs(kvm); |
8335713a | 1270 | KVM_EVENT(3, "vm 0x%pK destroyed", kvm); |
b0c632db HC |
1271 | } |
1272 | ||
1273 | /* Section: vcpu related */ | |
dafd032a DD |
1274 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1275 | { | |
1276 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
1277 | if (!vcpu->arch.gmap) | |
1278 | return -ENOMEM; | |
1279 | vcpu->arch.gmap->private = vcpu->kvm; | |
1280 | ||
1281 | return 0; | |
1282 | } | |
1283 | ||
a6e2f683 ED |
1284 | static void sca_del_vcpu(struct kvm_vcpu *vcpu) |
1285 | { | |
5e044315 | 1286 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
1287 | if (vcpu->kvm->arch.use_esca) { |
1288 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
a6e2f683 | 1289 | |
7d43bafc | 1290 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
10ce32d5 | 1291 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc ED |
1292 | } else { |
1293 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
1294 | ||
1295 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); | |
10ce32d5 | 1296 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc | 1297 | } |
5e044315 | 1298 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a6e2f683 ED |
1299 | } |
1300 | ||
eaa78f34 | 1301 | static void sca_add_vcpu(struct kvm_vcpu *vcpu) |
a6e2f683 | 1302 | { |
eaa78f34 DH |
1303 | read_lock(&vcpu->kvm->arch.sca_lock); |
1304 | if (vcpu->kvm->arch.use_esca) { | |
1305 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
7d43bafc | 1306 | |
eaa78f34 | 1307 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1308 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1309 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU; | |
25508824 | 1310 | vcpu->arch.sie_block->ecb2 |= 0x04U; |
eaa78f34 | 1311 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
7d43bafc | 1312 | } else { |
eaa78f34 | 1313 | struct bsca_block *sca = vcpu->kvm->arch.sca; |
a6e2f683 | 1314 | |
eaa78f34 | 1315 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1316 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1317 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
eaa78f34 | 1318 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); |
7d43bafc | 1319 | } |
eaa78f34 | 1320 | read_unlock(&vcpu->kvm->arch.sca_lock); |
5e044315 ED |
1321 | } |
1322 | ||
1323 | /* Basic SCA to Extended SCA data copy routines */ | |
1324 | static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s) | |
1325 | { | |
1326 | d->sda = s->sda; | |
1327 | d->sigp_ctrl.c = s->sigp_ctrl.c; | |
1328 | d->sigp_ctrl.scn = s->sigp_ctrl.scn; | |
1329 | } | |
1330 | ||
1331 | static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s) | |
1332 | { | |
1333 | int i; | |
1334 | ||
1335 | d->ipte_control = s->ipte_control; | |
1336 | d->mcn[0] = s->mcn; | |
1337 | for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++) | |
1338 | sca_copy_entry(&d->cpu[i], &s->cpu[i]); | |
1339 | } | |
1340 | ||
1341 | static int sca_switch_to_extended(struct kvm *kvm) | |
1342 | { | |
1343 | struct bsca_block *old_sca = kvm->arch.sca; | |
1344 | struct esca_block *new_sca; | |
1345 | struct kvm_vcpu *vcpu; | |
1346 | unsigned int vcpu_idx; | |
1347 | u32 scaol, scaoh; | |
1348 | ||
1349 | new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO); | |
1350 | if (!new_sca) | |
1351 | return -ENOMEM; | |
1352 | ||
1353 | scaoh = (u32)((u64)(new_sca) >> 32); | |
1354 | scaol = (u32)(u64)(new_sca) & ~0x3fU; | |
1355 | ||
1356 | kvm_s390_vcpu_block_all(kvm); | |
1357 | write_lock(&kvm->arch.sca_lock); | |
1358 | ||
1359 | sca_copy_b_to_e(new_sca, old_sca); | |
1360 | ||
1361 | kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) { | |
1362 | vcpu->arch.sie_block->scaoh = scaoh; | |
1363 | vcpu->arch.sie_block->scaol = scaol; | |
1364 | vcpu->arch.sie_block->ecb2 |= 0x04U; | |
1365 | } | |
1366 | kvm->arch.sca = new_sca; | |
1367 | kvm->arch.use_esca = 1; | |
1368 | ||
1369 | write_unlock(&kvm->arch.sca_lock); | |
1370 | kvm_s390_vcpu_unblock_all(kvm); | |
1371 | ||
1372 | free_page((unsigned long)old_sca); | |
1373 | ||
8335713a CB |
1374 | VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)", |
1375 | old_sca, kvm->arch.sca); | |
5e044315 | 1376 | return 0; |
a6e2f683 ED |
1377 | } |
1378 | ||
1379 | static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id) | |
1380 | { | |
5e044315 ED |
1381 | int rc; |
1382 | ||
1383 | if (id < KVM_S390_BSCA_CPU_SLOTS) | |
1384 | return true; | |
1385 | if (!sclp.has_esca) | |
1386 | return false; | |
1387 | ||
1388 | mutex_lock(&kvm->lock); | |
1389 | rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm); | |
1390 | mutex_unlock(&kvm->lock); | |
1391 | ||
1392 | return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS; | |
a6e2f683 ED |
1393 | } |
1394 | ||
b0c632db HC |
1395 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1396 | { | |
3c038e6b DD |
1397 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1398 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1399 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1400 | KVM_SYNC_GPRS | | |
9eed0735 | 1401 | KVM_SYNC_ACRS | |
b028ee3e DH |
1402 | KVM_SYNC_CRS | |
1403 | KVM_SYNC_ARCH0 | | |
1404 | KVM_SYNC_PFAULT; | |
c6e5f166 FZ |
1405 | if (test_kvm_facility(vcpu->kvm, 64)) |
1406 | vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB; | |
f6aa6dc4 DH |
1407 | /* fprs can be synchronized via vrs, even if the guest has no vx. With |
1408 | * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. | |
1409 | */ | |
1410 | if (MACHINE_HAS_VX) | |
68c55750 | 1411 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; |
6fd8e67d DH |
1412 | else |
1413 | vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS; | |
dafd032a DD |
1414 | |
1415 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1416 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1417 | ||
b0c632db HC |
1418 | return 0; |
1419 | } | |
1420 | ||
db0758b2 DH |
1421 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
1422 | static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1423 | { | |
1424 | WARN_ON_ONCE(vcpu->arch.cputm_start != 0); | |
9c23a131 | 1425 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1426 | vcpu->arch.cputm_start = get_tod_clock_fast(); |
9c23a131 | 1427 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1428 | } |
1429 | ||
1430 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1431 | static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1432 | { | |
1433 | WARN_ON_ONCE(vcpu->arch.cputm_start == 0); | |
9c23a131 | 1434 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1435 | vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start; |
1436 | vcpu->arch.cputm_start = 0; | |
9c23a131 | 1437 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1438 | } |
1439 | ||
1440 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1441 | static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1442 | { | |
1443 | WARN_ON_ONCE(vcpu->arch.cputm_enabled); | |
1444 | vcpu->arch.cputm_enabled = true; | |
1445 | __start_cpu_timer_accounting(vcpu); | |
1446 | } | |
1447 | ||
1448 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1449 | static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1450 | { | |
1451 | WARN_ON_ONCE(!vcpu->arch.cputm_enabled); | |
1452 | __stop_cpu_timer_accounting(vcpu); | |
1453 | vcpu->arch.cputm_enabled = false; | |
1454 | } | |
1455 | ||
1456 | static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1457 | { | |
1458 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1459 | __enable_cpu_timer_accounting(vcpu); | |
1460 | preempt_enable(); | |
1461 | } | |
1462 | ||
1463 | static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1464 | { | |
1465 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1466 | __disable_cpu_timer_accounting(vcpu); | |
1467 | preempt_enable(); | |
1468 | } | |
1469 | ||
4287f247 DH |
1470 | /* set the cpu timer - may only be called from the VCPU thread itself */ |
1471 | void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm) | |
1472 | { | |
db0758b2 | 1473 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
9c23a131 | 1474 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1475 | if (vcpu->arch.cputm_enabled) |
1476 | vcpu->arch.cputm_start = get_tod_clock_fast(); | |
4287f247 | 1477 | vcpu->arch.sie_block->cputm = cputm; |
9c23a131 | 1478 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1479 | preempt_enable(); |
4287f247 DH |
1480 | } |
1481 | ||
db0758b2 | 1482 | /* update and get the cpu timer - can also be called from other VCPU threads */ |
4287f247 DH |
1483 | __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) |
1484 | { | |
9c23a131 | 1485 | unsigned int seq; |
db0758b2 | 1486 | __u64 value; |
db0758b2 DH |
1487 | |
1488 | if (unlikely(!vcpu->arch.cputm_enabled)) | |
1489 | return vcpu->arch.sie_block->cputm; | |
1490 | ||
9c23a131 DH |
1491 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
1492 | do { | |
1493 | seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount); | |
1494 | /* | |
1495 | * If the writer would ever execute a read in the critical | |
1496 | * section, e.g. in irq context, we have a deadlock. | |
1497 | */ | |
1498 | WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu); | |
1499 | value = vcpu->arch.sie_block->cputm; | |
1500 | /* if cputm_start is 0, accounting is being started/stopped */ | |
1501 | if (likely(vcpu->arch.cputm_start)) | |
1502 | value -= get_tod_clock_fast() - vcpu->arch.cputm_start; | |
1503 | } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1)); | |
1504 | preempt_enable(); | |
db0758b2 | 1505 | return value; |
4287f247 DH |
1506 | } |
1507 | ||
b0c632db HC |
1508 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1509 | { | |
9977e886 | 1510 | /* Save host register state */ |
d0164ee2 | 1511 | save_fpu_regs(); |
9abc2a08 DH |
1512 | vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; |
1513 | vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; | |
9977e886 | 1514 | |
6fd8e67d DH |
1515 | if (MACHINE_HAS_VX) |
1516 | current->thread.fpu.regs = vcpu->run->s.regs.vrs; | |
1517 | else | |
1518 | current->thread.fpu.regs = vcpu->run->s.regs.fprs; | |
9abc2a08 | 1519 | current->thread.fpu.fpc = vcpu->run->s.regs.fpc; |
9977e886 | 1520 | if (test_fp_ctl(current->thread.fpu.fpc)) |
96b2d7a8 | 1521 | /* User space provided an invalid FPC, let's clear it */ |
9977e886 HB |
1522 | current->thread.fpu.fpc = 0; |
1523 | ||
1524 | save_access_regs(vcpu->arch.host_acrs); | |
59674c1a | 1525 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 1526 | gmap_enable(vcpu->arch.gmap); |
805de8f4 | 1527 | atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
5ebda316 | 1528 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1529 | __start_cpu_timer_accounting(vcpu); |
01a745ac | 1530 | vcpu->cpu = cpu; |
b0c632db HC |
1531 | } |
1532 | ||
1533 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1534 | { | |
01a745ac | 1535 | vcpu->cpu = -1; |
5ebda316 | 1536 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1537 | __stop_cpu_timer_accounting(vcpu); |
805de8f4 | 1538 | atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 1539 | gmap_disable(vcpu->arch.gmap); |
9977e886 | 1540 | |
9abc2a08 | 1541 | /* Save guest register state */ |
d0164ee2 | 1542 | save_fpu_regs(); |
9abc2a08 | 1543 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
9977e886 | 1544 | |
9abc2a08 DH |
1545 | /* Restore host register state */ |
1546 | current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; | |
1547 | current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; | |
9977e886 HB |
1548 | |
1549 | save_access_regs(vcpu->run->s.regs.acrs); | |
b0c632db HC |
1550 | restore_access_regs(vcpu->arch.host_acrs); |
1551 | } | |
1552 | ||
1553 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1554 | { | |
1555 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1556 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1557 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1558 | kvm_s390_set_prefix(vcpu, 0); |
4287f247 | 1559 | kvm_s390_set_cpu_timer(vcpu, 0); |
b0c632db HC |
1560 | vcpu->arch.sie_block->ckc = 0UL; |
1561 | vcpu->arch.sie_block->todpr = 0; | |
1562 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1563 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1564 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
9abc2a08 DH |
1565 | /* make sure the new fpc will be lazily loaded */ |
1566 | save_fpu_regs(); | |
1567 | current->thread.fpu.fpc = 0; | |
b0c632db | 1568 | vcpu->arch.sie_block->gbea = 1; |
672550fb | 1569 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1570 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1571 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1572 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1573 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1574 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1575 | } |
1576 | ||
31928aa5 | 1577 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1578 | { |
72f25020 | 1579 | mutex_lock(&vcpu->kvm->lock); |
fdf03650 | 1580 | preempt_disable(); |
72f25020 | 1581 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
fdf03650 | 1582 | preempt_enable(); |
72f25020 | 1583 | mutex_unlock(&vcpu->kvm->lock); |
25508824 | 1584 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
dafd032a | 1585 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
eaa78f34 | 1586 | sca_add_vcpu(vcpu); |
25508824 DH |
1587 | } |
1588 | ||
42897d86 MT |
1589 | } |
1590 | ||
5102ee87 TK |
1591 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1592 | { | |
9d8d5786 | 1593 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1594 | return; |
1595 | ||
a374e892 TK |
1596 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1597 | ||
1598 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1599 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1600 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1601 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1602 | ||
5102ee87 TK |
1603 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1604 | } | |
1605 | ||
b31605c1 DD |
1606 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1607 | { | |
1608 | free_page(vcpu->arch.sie_block->cbrlo); | |
1609 | vcpu->arch.sie_block->cbrlo = 0; | |
1610 | } | |
1611 | ||
1612 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1613 | { | |
1614 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1615 | if (!vcpu->arch.sie_block->cbrlo) | |
1616 | return -ENOMEM; | |
1617 | ||
1618 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1619 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1620 | return 0; | |
1621 | } | |
1622 | ||
91520f1a MM |
1623 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1624 | { | |
1625 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1626 | ||
1627 | vcpu->arch.cpu_id = model->cpu_id; | |
1628 | vcpu->arch.sie_block->ibc = model->ibc; | |
80bc79dc | 1629 | if (test_kvm_facility(vcpu->kvm, 7)) |
c54f0d6a | 1630 | vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list; |
91520f1a MM |
1631 | } |
1632 | ||
b0c632db HC |
1633 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1634 | { | |
b31605c1 | 1635 | int rc = 0; |
b31288fa | 1636 | |
9e6dabef CH |
1637 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1638 | CPUSTAT_SM | | |
a4a4f191 GH |
1639 | CPUSTAT_STOPPED); |
1640 | ||
53df84f8 | 1641 | if (test_kvm_facility(vcpu->kvm, 78)) |
805de8f4 | 1642 | atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); |
53df84f8 | 1643 | else if (test_kvm_facility(vcpu->kvm, 8)) |
805de8f4 | 1644 | atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
a4a4f191 | 1645 | |
91520f1a MM |
1646 | kvm_s390_vcpu_setup_model(vcpu); |
1647 | ||
fc34531d | 1648 | vcpu->arch.sie_block->ecb = 6; |
9d8d5786 | 1649 | if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1650 | vcpu->arch.sie_block->ecb |= 0x10; |
1651 | ||
69d0d3a3 | 1652 | vcpu->arch.sie_block->ecb2 = 8; |
ea5f4969 | 1653 | vcpu->arch.sie_block->eca = 0xC1002000U; |
37c5f6c8 | 1654 | if (sclp.has_siif) |
217a4406 | 1655 | vcpu->arch.sie_block->eca |= 1; |
37c5f6c8 | 1656 | if (sclp.has_sigpif) |
ea5f4969 | 1657 | vcpu->arch.sie_block->eca |= 0x10000000U; |
c6e5f166 FZ |
1658 | if (test_kvm_facility(vcpu->kvm, 64)) |
1659 | vcpu->arch.sie_block->ecb3 |= 0x01; | |
18280d8b | 1660 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1661 | vcpu->arch.sie_block->eca |= 0x00020000; |
1662 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1663 | } | |
c6e5f166 | 1664 | vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb; |
492d8642 | 1665 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1666 | |
e6db1d61 | 1667 | if (vcpu->kvm->arch.use_cmma) { |
b31605c1 DD |
1668 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
1669 | if (rc) | |
1670 | return rc; | |
b31288fa | 1671 | } |
0ac96caf | 1672 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1673 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1674 | |
5102ee87 TK |
1675 | kvm_s390_vcpu_crypto_setup(vcpu); |
1676 | ||
b31605c1 | 1677 | return rc; |
b0c632db HC |
1678 | } |
1679 | ||
1680 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1681 | unsigned int id) | |
1682 | { | |
4d47555a | 1683 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1684 | struct sie_page *sie_page; |
4d47555a CO |
1685 | int rc = -EINVAL; |
1686 | ||
4215825e | 1687 | if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id)) |
4d47555a CO |
1688 | goto out; |
1689 | ||
1690 | rc = -ENOMEM; | |
b0c632db | 1691 | |
b110feaf | 1692 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1693 | if (!vcpu) |
4d47555a | 1694 | goto out; |
b0c632db | 1695 | |
7feb6bb8 MM |
1696 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1697 | if (!sie_page) | |
b0c632db HC |
1698 | goto out_free_cpu; |
1699 | ||
7feb6bb8 MM |
1700 | vcpu->arch.sie_block = &sie_page->sie_block; |
1701 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
1702 | ||
b0c632db | 1703 | vcpu->arch.sie_block->icpua = id; |
ba5c1e9b | 1704 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1705 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 1706 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 1707 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
9c23a131 | 1708 | seqcount_init(&vcpu->arch.cputm_seqcount); |
ba5c1e9b | 1709 | |
b0c632db HC |
1710 | rc = kvm_vcpu_init(vcpu, kvm, id); |
1711 | if (rc) | |
9abc2a08 | 1712 | goto out_free_sie_block; |
8335713a | 1713 | VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu, |
b0c632db | 1714 | vcpu->arch.sie_block); |
ade38c31 | 1715 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 1716 | |
b0c632db | 1717 | return vcpu; |
7b06bf2f WY |
1718 | out_free_sie_block: |
1719 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 1720 | out_free_cpu: |
b110feaf | 1721 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 1722 | out: |
b0c632db HC |
1723 | return ERR_PTR(rc); |
1724 | } | |
1725 | ||
b0c632db HC |
1726 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
1727 | { | |
9a022067 | 1728 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
1729 | } |
1730 | ||
27406cd5 | 1731 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e | 1732 | { |
805de8f4 | 1733 | atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1734 | exit_sie(vcpu); |
49b99e1e CB |
1735 | } |
1736 | ||
27406cd5 | 1737 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e | 1738 | { |
805de8f4 | 1739 | atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
49b99e1e CB |
1740 | } |
1741 | ||
8e236546 CB |
1742 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
1743 | { | |
805de8f4 | 1744 | atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1745 | exit_sie(vcpu); |
8e236546 CB |
1746 | } |
1747 | ||
1748 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
1749 | { | |
9bf9fde2 | 1750 | atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
8e236546 CB |
1751 | } |
1752 | ||
49b99e1e CB |
1753 | /* |
1754 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
1755 | * If the CPU is not running (e.g. waiting as idle) the function will | |
1756 | * return immediately. */ | |
1757 | void exit_sie(struct kvm_vcpu *vcpu) | |
1758 | { | |
805de8f4 | 1759 | atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
49b99e1e CB |
1760 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
1761 | cpu_relax(); | |
1762 | } | |
1763 | ||
8e236546 CB |
1764 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
1765 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 1766 | { |
8e236546 CB |
1767 | kvm_make_request(req, vcpu); |
1768 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
1769 | } |
1770 | ||
2c70fe44 CB |
1771 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
1772 | { | |
1773 | int i; | |
1774 | struct kvm *kvm = gmap->private; | |
1775 | struct kvm_vcpu *vcpu; | |
1776 | ||
1777 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1778 | /* match against both prefix pages */ | |
fda902cb | 1779 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 | 1780 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
8e236546 | 1781 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
1782 | } |
1783 | } | |
1784 | } | |
1785 | ||
b6d33834 CD |
1786 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
1787 | { | |
1788 | /* kvm common code refers to this, but never calls it */ | |
1789 | BUG(); | |
1790 | return 0; | |
1791 | } | |
1792 | ||
14eebd91 CO |
1793 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
1794 | struct kvm_one_reg *reg) | |
1795 | { | |
1796 | int r = -EINVAL; | |
1797 | ||
1798 | switch (reg->id) { | |
29b7c71b CO |
1799 | case KVM_REG_S390_TODPR: |
1800 | r = put_user(vcpu->arch.sie_block->todpr, | |
1801 | (u32 __user *)reg->addr); | |
1802 | break; | |
1803 | case KVM_REG_S390_EPOCHDIFF: | |
1804 | r = put_user(vcpu->arch.sie_block->epoch, | |
1805 | (u64 __user *)reg->addr); | |
1806 | break; | |
46a6dd1c | 1807 | case KVM_REG_S390_CPU_TIMER: |
4287f247 | 1808 | r = put_user(kvm_s390_get_cpu_timer(vcpu), |
46a6dd1c J |
1809 | (u64 __user *)reg->addr); |
1810 | break; | |
1811 | case KVM_REG_S390_CLOCK_COMP: | |
1812 | r = put_user(vcpu->arch.sie_block->ckc, | |
1813 | (u64 __user *)reg->addr); | |
1814 | break; | |
536336c2 DD |
1815 | case KVM_REG_S390_PFTOKEN: |
1816 | r = put_user(vcpu->arch.pfault_token, | |
1817 | (u64 __user *)reg->addr); | |
1818 | break; | |
1819 | case KVM_REG_S390_PFCOMPARE: | |
1820 | r = put_user(vcpu->arch.pfault_compare, | |
1821 | (u64 __user *)reg->addr); | |
1822 | break; | |
1823 | case KVM_REG_S390_PFSELECT: | |
1824 | r = put_user(vcpu->arch.pfault_select, | |
1825 | (u64 __user *)reg->addr); | |
1826 | break; | |
672550fb CB |
1827 | case KVM_REG_S390_PP: |
1828 | r = put_user(vcpu->arch.sie_block->pp, | |
1829 | (u64 __user *)reg->addr); | |
1830 | break; | |
afa45ff5 CB |
1831 | case KVM_REG_S390_GBEA: |
1832 | r = put_user(vcpu->arch.sie_block->gbea, | |
1833 | (u64 __user *)reg->addr); | |
1834 | break; | |
14eebd91 CO |
1835 | default: |
1836 | break; | |
1837 | } | |
1838 | ||
1839 | return r; | |
1840 | } | |
1841 | ||
1842 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
1843 | struct kvm_one_reg *reg) | |
1844 | { | |
1845 | int r = -EINVAL; | |
4287f247 | 1846 | __u64 val; |
14eebd91 CO |
1847 | |
1848 | switch (reg->id) { | |
29b7c71b CO |
1849 | case KVM_REG_S390_TODPR: |
1850 | r = get_user(vcpu->arch.sie_block->todpr, | |
1851 | (u32 __user *)reg->addr); | |
1852 | break; | |
1853 | case KVM_REG_S390_EPOCHDIFF: | |
1854 | r = get_user(vcpu->arch.sie_block->epoch, | |
1855 | (u64 __user *)reg->addr); | |
1856 | break; | |
46a6dd1c | 1857 | case KVM_REG_S390_CPU_TIMER: |
4287f247 DH |
1858 | r = get_user(val, (u64 __user *)reg->addr); |
1859 | if (!r) | |
1860 | kvm_s390_set_cpu_timer(vcpu, val); | |
46a6dd1c J |
1861 | break; |
1862 | case KVM_REG_S390_CLOCK_COMP: | |
1863 | r = get_user(vcpu->arch.sie_block->ckc, | |
1864 | (u64 __user *)reg->addr); | |
1865 | break; | |
536336c2 DD |
1866 | case KVM_REG_S390_PFTOKEN: |
1867 | r = get_user(vcpu->arch.pfault_token, | |
1868 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
1869 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
1870 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
1871 | break; |
1872 | case KVM_REG_S390_PFCOMPARE: | |
1873 | r = get_user(vcpu->arch.pfault_compare, | |
1874 | (u64 __user *)reg->addr); | |
1875 | break; | |
1876 | case KVM_REG_S390_PFSELECT: | |
1877 | r = get_user(vcpu->arch.pfault_select, | |
1878 | (u64 __user *)reg->addr); | |
1879 | break; | |
672550fb CB |
1880 | case KVM_REG_S390_PP: |
1881 | r = get_user(vcpu->arch.sie_block->pp, | |
1882 | (u64 __user *)reg->addr); | |
1883 | break; | |
afa45ff5 CB |
1884 | case KVM_REG_S390_GBEA: |
1885 | r = get_user(vcpu->arch.sie_block->gbea, | |
1886 | (u64 __user *)reg->addr); | |
1887 | break; | |
14eebd91 CO |
1888 | default: |
1889 | break; | |
1890 | } | |
1891 | ||
1892 | return r; | |
1893 | } | |
b6d33834 | 1894 | |
b0c632db HC |
1895 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
1896 | { | |
b0c632db | 1897 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
1898 | return 0; |
1899 | } | |
1900 | ||
1901 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1902 | { | |
5a32c1af | 1903 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
1904 | return 0; |
1905 | } | |
1906 | ||
1907 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1908 | { | |
5a32c1af | 1909 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
1910 | return 0; |
1911 | } | |
1912 | ||
1913 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
1914 | struct kvm_sregs *sregs) | |
1915 | { | |
59674c1a | 1916 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 1917 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 1918 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
1919 | return 0; |
1920 | } | |
1921 | ||
1922 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
1923 | struct kvm_sregs *sregs) | |
1924 | { | |
59674c1a | 1925 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 1926 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
1927 | return 0; |
1928 | } | |
1929 | ||
1930 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1931 | { | |
9abc2a08 DH |
1932 | /* make sure the new values will be lazily loaded */ |
1933 | save_fpu_regs(); | |
4725c860 MS |
1934 | if (test_fp_ctl(fpu->fpc)) |
1935 | return -EINVAL; | |
9abc2a08 DH |
1936 | current->thread.fpu.fpc = fpu->fpc; |
1937 | if (MACHINE_HAS_VX) | |
1938 | convert_fp_to_vx(current->thread.fpu.vxrs, (freg_t *)fpu->fprs); | |
1939 | else | |
1940 | memcpy(current->thread.fpu.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
b0c632db HC |
1941 | return 0; |
1942 | } | |
1943 | ||
1944 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1945 | { | |
9abc2a08 DH |
1946 | /* make sure we have the latest values */ |
1947 | save_fpu_regs(); | |
1948 | if (MACHINE_HAS_VX) | |
1949 | convert_vx_to_fp((freg_t *)fpu->fprs, current->thread.fpu.vxrs); | |
1950 | else | |
1951 | memcpy(fpu->fprs, current->thread.fpu.fprs, sizeof(fpu->fprs)); | |
1952 | fpu->fpc = current->thread.fpu.fpc; | |
b0c632db HC |
1953 | return 0; |
1954 | } | |
1955 | ||
1956 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
1957 | { | |
1958 | int rc = 0; | |
1959 | ||
7a42fdc2 | 1960 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 1961 | rc = -EBUSY; |
d7b0b5eb CO |
1962 | else { |
1963 | vcpu->run->psw_mask = psw.mask; | |
1964 | vcpu->run->psw_addr = psw.addr; | |
1965 | } | |
b0c632db HC |
1966 | return rc; |
1967 | } | |
1968 | ||
1969 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1970 | struct kvm_translation *tr) | |
1971 | { | |
1972 | return -EINVAL; /* not implemented yet */ | |
1973 | } | |
1974 | ||
27291e21 DH |
1975 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
1976 | KVM_GUESTDBG_USE_HW_BP | \ | |
1977 | KVM_GUESTDBG_ENABLE) | |
1978 | ||
d0bfb940 JK |
1979 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
1980 | struct kvm_guest_debug *dbg) | |
b0c632db | 1981 | { |
27291e21 DH |
1982 | int rc = 0; |
1983 | ||
1984 | vcpu->guest_debug = 0; | |
1985 | kvm_s390_clear_bp_data(vcpu); | |
1986 | ||
2de3bfc2 | 1987 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
1988 | return -EINVAL; |
1989 | ||
1990 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
1991 | vcpu->guest_debug = dbg->control; | |
1992 | /* enforce guest PER */ | |
805de8f4 | 1993 | atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
1994 | |
1995 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
1996 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
1997 | } else { | |
805de8f4 | 1998 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
1999 | vcpu->arch.guestdbg.last_bp = 0; |
2000 | } | |
2001 | ||
2002 | if (rc) { | |
2003 | vcpu->guest_debug = 0; | |
2004 | kvm_s390_clear_bp_data(vcpu); | |
805de8f4 | 2005 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2006 | } |
2007 | ||
2008 | return rc; | |
b0c632db HC |
2009 | } |
2010 | ||
62d9f0db MT |
2011 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
2012 | struct kvm_mp_state *mp_state) | |
2013 | { | |
6352e4d2 DH |
2014 | /* CHECK_STOP and LOAD are not supported yet */ |
2015 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
2016 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
2017 | } |
2018 | ||
2019 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
2020 | struct kvm_mp_state *mp_state) | |
2021 | { | |
6352e4d2 DH |
2022 | int rc = 0; |
2023 | ||
2024 | /* user space knows about this interface - let it control the state */ | |
2025 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
2026 | ||
2027 | switch (mp_state->mp_state) { | |
2028 | case KVM_MP_STATE_STOPPED: | |
2029 | kvm_s390_vcpu_stop(vcpu); | |
2030 | break; | |
2031 | case KVM_MP_STATE_OPERATING: | |
2032 | kvm_s390_vcpu_start(vcpu); | |
2033 | break; | |
2034 | case KVM_MP_STATE_LOAD: | |
2035 | case KVM_MP_STATE_CHECK_STOP: | |
2036 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
2037 | default: | |
2038 | rc = -ENXIO; | |
2039 | } | |
2040 | ||
2041 | return rc; | |
62d9f0db MT |
2042 | } |
2043 | ||
8ad35755 DH |
2044 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
2045 | { | |
2046 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
2047 | } | |
2048 | ||
2c70fe44 CB |
2049 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
2050 | { | |
8ad35755 | 2051 | retry: |
8e236546 | 2052 | kvm_s390_vcpu_request_handled(vcpu); |
586b7ccd CB |
2053 | if (!vcpu->requests) |
2054 | return 0; | |
2c70fe44 CB |
2055 | /* |
2056 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
2057 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
2058 | * This ensures that the ipte instruction for this request has | |
2059 | * already finished. We might race against a second unmapper that | |
2060 | * wants to set the blocking bit. Lets just retry the request loop. | |
2061 | */ | |
8ad35755 | 2062 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
2063 | int rc; |
2064 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 2065 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
2066 | PAGE_SIZE * 2); |
2067 | if (rc) | |
2068 | return rc; | |
8ad35755 | 2069 | goto retry; |
2c70fe44 | 2070 | } |
8ad35755 | 2071 | |
d3d692c8 DH |
2072 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
2073 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
2074 | goto retry; | |
2075 | } | |
2076 | ||
8ad35755 DH |
2077 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
2078 | if (!ibs_enabled(vcpu)) { | |
2079 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
805de8f4 | 2080 | atomic_or(CPUSTAT_IBS, |
8ad35755 DH |
2081 | &vcpu->arch.sie_block->cpuflags); |
2082 | } | |
2083 | goto retry; | |
2c70fe44 | 2084 | } |
8ad35755 DH |
2085 | |
2086 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
2087 | if (ibs_enabled(vcpu)) { | |
2088 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
805de8f4 | 2089 | atomic_andnot(CPUSTAT_IBS, |
8ad35755 DH |
2090 | &vcpu->arch.sie_block->cpuflags); |
2091 | } | |
2092 | goto retry; | |
2093 | } | |
2094 | ||
0759d068 DH |
2095 | /* nothing to do, just clear the request */ |
2096 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
2097 | ||
2c70fe44 CB |
2098 | return 0; |
2099 | } | |
2100 | ||
25ed1675 DH |
2101 | void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod) |
2102 | { | |
2103 | struct kvm_vcpu *vcpu; | |
2104 | int i; | |
2105 | ||
2106 | mutex_lock(&kvm->lock); | |
2107 | preempt_disable(); | |
2108 | kvm->arch.epoch = tod - get_tod_clock(); | |
2109 | kvm_s390_vcpu_block_all(kvm); | |
2110 | kvm_for_each_vcpu(i, vcpu, kvm) | |
2111 | vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
2112 | kvm_s390_vcpu_unblock_all(kvm); | |
2113 | preempt_enable(); | |
2114 | mutex_unlock(&kvm->lock); | |
2115 | } | |
2116 | ||
fa576c58 TH |
2117 | /** |
2118 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
2119 | * @vcpu: The corresponding virtual cpu | |
2120 | * @gpa: Guest physical address | |
2121 | * @writable: Whether the page should be writable or not | |
2122 | * | |
2123 | * Make sure that a guest page has been faulted-in on the host. | |
2124 | * | |
2125 | * Return: Zero on success, negative error code otherwise. | |
2126 | */ | |
2127 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 2128 | { |
527e30b4 MS |
2129 | return gmap_fault(vcpu->arch.gmap, gpa, |
2130 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
2131 | } |
2132 | ||
3c038e6b DD |
2133 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
2134 | unsigned long token) | |
2135 | { | |
2136 | struct kvm_s390_interrupt inti; | |
383d0b05 | 2137 | struct kvm_s390_irq irq; |
3c038e6b DD |
2138 | |
2139 | if (start_token) { | |
383d0b05 JF |
2140 | irq.u.ext.ext_params2 = token; |
2141 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
2142 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
2143 | } else { |
2144 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 2145 | inti.parm64 = token; |
3c038e6b DD |
2146 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
2147 | } | |
2148 | } | |
2149 | ||
2150 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
2151 | struct kvm_async_pf *work) | |
2152 | { | |
2153 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
2154 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
2155 | } | |
2156 | ||
2157 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
2158 | struct kvm_async_pf *work) | |
2159 | { | |
2160 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
2161 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
2162 | } | |
2163 | ||
2164 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
2165 | struct kvm_async_pf *work) | |
2166 | { | |
2167 | /* s390 will always inject the page directly */ | |
2168 | } | |
2169 | ||
2170 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
2171 | { | |
2172 | /* | |
2173 | * s390 will always inject the page directly, | |
2174 | * but we still want check_async_completion to cleanup | |
2175 | */ | |
2176 | return true; | |
2177 | } | |
2178 | ||
2179 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
2180 | { | |
2181 | hva_t hva; | |
2182 | struct kvm_arch_async_pf arch; | |
2183 | int rc; | |
2184 | ||
2185 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
2186 | return 0; | |
2187 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
2188 | vcpu->arch.pfault_compare) | |
2189 | return 0; | |
2190 | if (psw_extint_disabled(vcpu)) | |
2191 | return 0; | |
9a022067 | 2192 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
2193 | return 0; |
2194 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
2195 | return 0; | |
2196 | if (!vcpu->arch.gmap->pfault_enabled) | |
2197 | return 0; | |
2198 | ||
81480cc1 HC |
2199 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
2200 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
2201 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
2202 | return 0; |
2203 | ||
2204 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
2205 | return rc; | |
2206 | } | |
2207 | ||
3fb4c40f | 2208 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 2209 | { |
3fb4c40f | 2210 | int rc, cpuflags; |
e168bf8d | 2211 | |
3c038e6b DD |
2212 | /* |
2213 | * On s390 notifications for arriving pages will be delivered directly | |
2214 | * to the guest but the house keeping for completed pfaults is | |
2215 | * handled outside the worker. | |
2216 | */ | |
2217 | kvm_check_async_pf_completion(vcpu); | |
2218 | ||
7ec7c8c7 CB |
2219 | vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14]; |
2220 | vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15]; | |
b0c632db HC |
2221 | |
2222 | if (need_resched()) | |
2223 | schedule(); | |
2224 | ||
d3a73acb | 2225 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
2226 | s390_handle_mcck(); |
2227 | ||
79395031 JF |
2228 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
2229 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
2230 | if (rc) | |
2231 | return rc; | |
2232 | } | |
0ff31867 | 2233 | |
2c70fe44 CB |
2234 | rc = kvm_s390_handle_requests(vcpu); |
2235 | if (rc) | |
2236 | return rc; | |
2237 | ||
27291e21 DH |
2238 | if (guestdbg_enabled(vcpu)) { |
2239 | kvm_s390_backup_guest_per_regs(vcpu); | |
2240 | kvm_s390_patch_guest_per_regs(vcpu); | |
2241 | } | |
2242 | ||
b0c632db | 2243 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
2244 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
2245 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
2246 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 2247 | |
3fb4c40f TH |
2248 | return 0; |
2249 | } | |
2250 | ||
492d8642 TH |
2251 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
2252 | { | |
56317920 DH |
2253 | struct kvm_s390_pgm_info pgm_info = { |
2254 | .code = PGM_ADDRESSING, | |
2255 | }; | |
2256 | u8 opcode, ilen; | |
492d8642 TH |
2257 | int rc; |
2258 | ||
2259 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
2260 | trace_kvm_s390_sie_fault(vcpu); | |
2261 | ||
2262 | /* | |
2263 | * We want to inject an addressing exception, which is defined as a | |
2264 | * suppressing or terminating exception. However, since we came here | |
2265 | * by a DAT access exception, the PSW still points to the faulting | |
2266 | * instruction since DAT exceptions are nullifying. So we've got | |
2267 | * to look up the current opcode to get the length of the instruction | |
2268 | * to be able to forward the PSW. | |
2269 | */ | |
65977322 | 2270 | rc = read_guest_instr(vcpu, &opcode, 1); |
56317920 | 2271 | ilen = insn_length(opcode); |
9b0d721a DH |
2272 | if (rc < 0) { |
2273 | return rc; | |
2274 | } else if (rc) { | |
2275 | /* Instruction-Fetching Exceptions - we can't detect the ilen. | |
2276 | * Forward by arbitrary ilc, injection will take care of | |
2277 | * nullification if necessary. | |
2278 | */ | |
2279 | pgm_info = vcpu->arch.pgm; | |
2280 | ilen = 4; | |
2281 | } | |
56317920 DH |
2282 | pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID; |
2283 | kvm_s390_forward_psw(vcpu, ilen); | |
2284 | return kvm_s390_inject_prog_irq(vcpu, &pgm_info); | |
492d8642 TH |
2285 | } |
2286 | ||
3fb4c40f TH |
2287 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
2288 | { | |
2b29a9fd DD |
2289 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
2290 | vcpu->arch.sie_block->icptcode); | |
2291 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
2292 | ||
27291e21 DH |
2293 | if (guestdbg_enabled(vcpu)) |
2294 | kvm_s390_restore_guest_per_regs(vcpu); | |
2295 | ||
7ec7c8c7 CB |
2296 | vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14; |
2297 | vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15; | |
71f116bf DH |
2298 | |
2299 | if (vcpu->arch.sie_block->icptcode > 0) { | |
2300 | int rc = kvm_handle_sie_intercept(vcpu); | |
2301 | ||
2302 | if (rc != -EOPNOTSUPP) | |
2303 | return rc; | |
2304 | vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2305 | vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
2306 | vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
2307 | vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2308 | return -EREMOTE; | |
2309 | } else if (exit_reason != -EFAULT) { | |
2310 | vcpu->stat.exit_null++; | |
2311 | return 0; | |
210b1607 TH |
2312 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
2313 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
2314 | vcpu->run->s390_ucontrol.trans_exc_code = | |
2315 | current->thread.gmap_addr; | |
2316 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
71f116bf | 2317 | return -EREMOTE; |
24eb3a82 | 2318 | } else if (current->thread.gmap_pfault) { |
3c038e6b | 2319 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 2320 | current->thread.gmap_pfault = 0; |
71f116bf DH |
2321 | if (kvm_arch_setup_async_pf(vcpu)) |
2322 | return 0; | |
2323 | return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1); | |
a76ccff6 | 2324 | } |
71f116bf | 2325 | return vcpu_post_run_fault_in_sie(vcpu); |
3fb4c40f TH |
2326 | } |
2327 | ||
2328 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
2329 | { | |
2330 | int rc, exit_reason; | |
2331 | ||
800c1065 TH |
2332 | /* |
2333 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
2334 | * ning the guest), so that memslots (and other stuff) are protected | |
2335 | */ | |
2336 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2337 | ||
a76ccff6 TH |
2338 | do { |
2339 | rc = vcpu_pre_run(vcpu); | |
2340 | if (rc) | |
2341 | break; | |
3fb4c40f | 2342 | |
800c1065 | 2343 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
2344 | /* |
2345 | * As PF_VCPU will be used in fault handler, between | |
2346 | * guest_enter and guest_exit should be no uaccess. | |
2347 | */ | |
0097d12e CB |
2348 | local_irq_disable(); |
2349 | __kvm_guest_enter(); | |
db0758b2 | 2350 | __disable_cpu_timer_accounting(vcpu); |
0097d12e | 2351 | local_irq_enable(); |
a76ccff6 TH |
2352 | exit_reason = sie64a(vcpu->arch.sie_block, |
2353 | vcpu->run->s.regs.gprs); | |
0097d12e | 2354 | local_irq_disable(); |
db0758b2 | 2355 | __enable_cpu_timer_accounting(vcpu); |
0097d12e CB |
2356 | __kvm_guest_exit(); |
2357 | local_irq_enable(); | |
800c1065 | 2358 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
2359 | |
2360 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 2361 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2362 | |
800c1065 | 2363 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2364 | return rc; |
b0c632db HC |
2365 | } |
2366 | ||
b028ee3e DH |
2367 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2368 | { | |
2369 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2370 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2371 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2372 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2373 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2374 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2375 | /* some control register changes require a tlb flush */ |
2376 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2377 | } |
2378 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
4287f247 | 2379 | kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm); |
b028ee3e DH |
2380 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; |
2381 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2382 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2383 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2384 | } | |
2385 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2386 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2387 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2388 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2389 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2390 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e DH |
2391 | } |
2392 | kvm_run->kvm_dirty_regs = 0; | |
2393 | } | |
2394 | ||
2395 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2396 | { | |
2397 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2398 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2399 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2400 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
4287f247 | 2401 | kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu); |
b028ee3e DH |
2402 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; |
2403 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2404 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2405 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2406 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2407 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2408 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
2409 | } | |
2410 | ||
b0c632db HC |
2411 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2412 | { | |
8f2abe6a | 2413 | int rc; |
b0c632db HC |
2414 | sigset_t sigsaved; |
2415 | ||
27291e21 DH |
2416 | if (guestdbg_exit_pending(vcpu)) { |
2417 | kvm_s390_prepare_debug_exit(vcpu); | |
2418 | return 0; | |
2419 | } | |
2420 | ||
b0c632db HC |
2421 | if (vcpu->sigset_active) |
2422 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2423 | ||
6352e4d2 DH |
2424 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2425 | kvm_s390_vcpu_start(vcpu); | |
2426 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 2427 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
2428 | vcpu->vcpu_id); |
2429 | return -EINVAL; | |
2430 | } | |
b0c632db | 2431 | |
b028ee3e | 2432 | sync_regs(vcpu, kvm_run); |
db0758b2 | 2433 | enable_cpu_timer_accounting(vcpu); |
d7b0b5eb | 2434 | |
dab4079d | 2435 | might_fault(); |
a76ccff6 | 2436 | rc = __vcpu_run(vcpu); |
9ace903d | 2437 | |
b1d16c49 CE |
2438 | if (signal_pending(current) && !rc) { |
2439 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2440 | rc = -EINTR; |
b1d16c49 | 2441 | } |
8f2abe6a | 2442 | |
27291e21 DH |
2443 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2444 | kvm_s390_prepare_debug_exit(vcpu); | |
2445 | rc = 0; | |
2446 | } | |
2447 | ||
8f2abe6a | 2448 | if (rc == -EREMOTE) { |
71f116bf | 2449 | /* userspace support is needed, kvm_run has been prepared */ |
8f2abe6a CB |
2450 | rc = 0; |
2451 | } | |
b0c632db | 2452 | |
db0758b2 | 2453 | disable_cpu_timer_accounting(vcpu); |
b028ee3e | 2454 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2455 | |
b0c632db HC |
2456 | if (vcpu->sigset_active) |
2457 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2458 | ||
b0c632db | 2459 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2460 | return rc; |
b0c632db HC |
2461 | } |
2462 | ||
b0c632db HC |
2463 | /* |
2464 | * store status at address | |
2465 | * we use have two special cases: | |
2466 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2467 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2468 | */ | |
d0bce605 | 2469 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2470 | { |
092670cd | 2471 | unsigned char archmode = 1; |
9abc2a08 | 2472 | freg_t fprs[NUM_FPRS]; |
fda902cb | 2473 | unsigned int px; |
4287f247 | 2474 | u64 clkcomp, cputm; |
d0bce605 | 2475 | int rc; |
b0c632db | 2476 | |
d9a3a09a | 2477 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 HC |
2478 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2479 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2480 | return -EFAULT; |
d9a3a09a | 2481 | gpa = 0; |
d0bce605 HC |
2482 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
2483 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2484 | return -EFAULT; |
d9a3a09a MS |
2485 | gpa = px; |
2486 | } else | |
2487 | gpa -= __LC_FPREGS_SAVE_AREA; | |
9abc2a08 DH |
2488 | |
2489 | /* manually convert vector registers if necessary */ | |
2490 | if (MACHINE_HAS_VX) { | |
9522b37f | 2491 | convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); |
9abc2a08 DH |
2492 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, |
2493 | fprs, 128); | |
2494 | } else { | |
2495 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, | |
6fd8e67d | 2496 | vcpu->run->s.regs.fprs, 128); |
9abc2a08 | 2497 | } |
d9a3a09a | 2498 | rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA, |
d0bce605 | 2499 | vcpu->run->s.regs.gprs, 128); |
d9a3a09a | 2500 | rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA, |
d0bce605 | 2501 | &vcpu->arch.sie_block->gpsw, 16); |
d9a3a09a | 2502 | rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA, |
fda902cb | 2503 | &px, 4); |
d9a3a09a | 2504 | rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA, |
9abc2a08 | 2505 | &vcpu->run->s.regs.fpc, 4); |
d9a3a09a | 2506 | rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA, |
d0bce605 | 2507 | &vcpu->arch.sie_block->todpr, 4); |
4287f247 | 2508 | cputm = kvm_s390_get_cpu_timer(vcpu); |
d9a3a09a | 2509 | rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA, |
4287f247 | 2510 | &cputm, 8); |
178bd789 | 2511 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d9a3a09a | 2512 | rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA, |
d0bce605 | 2513 | &clkcomp, 8); |
d9a3a09a | 2514 | rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA, |
d0bce605 | 2515 | &vcpu->run->s.regs.acrs, 64); |
d9a3a09a | 2516 | rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA, |
d0bce605 HC |
2517 | &vcpu->arch.sie_block->gcr, 128); |
2518 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2519 | } |
2520 | ||
e879892c TH |
2521 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2522 | { | |
2523 | /* | |
2524 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
2525 | * copying in vcpu load/put. Lets update our copies before we save | |
2526 | * it into the save area | |
2527 | */ | |
d0164ee2 | 2528 | save_fpu_regs(); |
9abc2a08 | 2529 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
e879892c TH |
2530 | save_access_regs(vcpu->run->s.regs.acrs); |
2531 | ||
2532 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2533 | } | |
2534 | ||
bc17de7c EF |
2535 | /* |
2536 | * store additional status at address | |
2537 | */ | |
2538 | int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, | |
2539 | unsigned long gpa) | |
2540 | { | |
2541 | /* Only bits 0-53 are used for address formation */ | |
2542 | if (!(gpa & ~0x3ff)) | |
2543 | return 0; | |
2544 | ||
2545 | return write_guest_abs(vcpu, gpa & ~0x3ff, | |
2546 | (void *)&vcpu->run->s.regs.vrs, 512); | |
2547 | } | |
2548 | ||
2549 | int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
2550 | { | |
2551 | if (!test_kvm_facility(vcpu->kvm, 129)) | |
2552 | return 0; | |
2553 | ||
2554 | /* | |
2555 | * The guest VXRS are in the host VXRs due to the lazy | |
9977e886 HB |
2556 | * copying in vcpu load/put. We can simply call save_fpu_regs() |
2557 | * to save the current register state because we are in the | |
2558 | * middle of a load/put cycle. | |
2559 | * | |
2560 | * Let's update our copies before we save it into the save area. | |
bc17de7c | 2561 | */ |
d0164ee2 | 2562 | save_fpu_regs(); |
bc17de7c EF |
2563 | |
2564 | return kvm_s390_store_adtl_status_unloaded(vcpu, addr); | |
2565 | } | |
2566 | ||
8ad35755 DH |
2567 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2568 | { | |
2569 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 2570 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
2571 | } |
2572 | ||
2573 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2574 | { | |
2575 | unsigned int i; | |
2576 | struct kvm_vcpu *vcpu; | |
2577 | ||
2578 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2579 | __disable_ibs_on_vcpu(vcpu); | |
2580 | } | |
2581 | } | |
2582 | ||
2583 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2584 | { | |
2585 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
8e236546 | 2586 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
2587 | } |
2588 | ||
6852d7b6 DH |
2589 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2590 | { | |
8ad35755 DH |
2591 | int i, online_vcpus, started_vcpus = 0; |
2592 | ||
2593 | if (!is_vcpu_stopped(vcpu)) | |
2594 | return; | |
2595 | ||
6852d7b6 | 2596 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2597 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2598 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2599 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2600 | ||
2601 | for (i = 0; i < online_vcpus; i++) { | |
2602 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2603 | started_vcpus++; | |
2604 | } | |
2605 | ||
2606 | if (started_vcpus == 0) { | |
2607 | /* we're the only active VCPU -> speed it up */ | |
2608 | __enable_ibs_on_vcpu(vcpu); | |
2609 | } else if (started_vcpus == 1) { | |
2610 | /* | |
2611 | * As we are starting a second VCPU, we have to disable | |
2612 | * the IBS facility on all VCPUs to remove potentially | |
2613 | * oustanding ENABLE requests. | |
2614 | */ | |
2615 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2616 | } | |
2617 | ||
805de8f4 | 2618 | atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2619 | /* |
2620 | * Another VCPU might have used IBS while we were offline. | |
2621 | * Let's play safe and flush the VCPU at startup. | |
2622 | */ | |
d3d692c8 | 2623 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2624 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2625 | return; |
6852d7b6 DH |
2626 | } |
2627 | ||
2628 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2629 | { | |
8ad35755 DH |
2630 | int i, online_vcpus, started_vcpus = 0; |
2631 | struct kvm_vcpu *started_vcpu = NULL; | |
2632 | ||
2633 | if (is_vcpu_stopped(vcpu)) | |
2634 | return; | |
2635 | ||
6852d7b6 | 2636 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2637 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2638 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2639 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2640 | ||
32f5ff63 | 2641 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2642 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2643 | |
805de8f4 | 2644 | atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2645 | __disable_ibs_on_vcpu(vcpu); |
2646 | ||
2647 | for (i = 0; i < online_vcpus; i++) { | |
2648 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2649 | started_vcpus++; | |
2650 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2651 | } | |
2652 | } | |
2653 | ||
2654 | if (started_vcpus == 1) { | |
2655 | /* | |
2656 | * As we only have one VCPU left, we want to enable the | |
2657 | * IBS facility for that VCPU to speed it up. | |
2658 | */ | |
2659 | __enable_ibs_on_vcpu(started_vcpu); | |
2660 | } | |
2661 | ||
433b9ee4 | 2662 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2663 | return; |
6852d7b6 DH |
2664 | } |
2665 | ||
d6712df9 CH |
2666 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2667 | struct kvm_enable_cap *cap) | |
2668 | { | |
2669 | int r; | |
2670 | ||
2671 | if (cap->flags) | |
2672 | return -EINVAL; | |
2673 | ||
2674 | switch (cap->cap) { | |
fa6b7fe9 CH |
2675 | case KVM_CAP_S390_CSS_SUPPORT: |
2676 | if (!vcpu->kvm->arch.css_support) { | |
2677 | vcpu->kvm->arch.css_support = 1; | |
c92ea7b9 | 2678 | VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
fa6b7fe9 CH |
2679 | trace_kvm_s390_enable_css(vcpu->kvm); |
2680 | } | |
2681 | r = 0; | |
2682 | break; | |
d6712df9 CH |
2683 | default: |
2684 | r = -EINVAL; | |
2685 | break; | |
2686 | } | |
2687 | return r; | |
2688 | } | |
2689 | ||
41408c28 TH |
2690 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
2691 | struct kvm_s390_mem_op *mop) | |
2692 | { | |
2693 | void __user *uaddr = (void __user *)mop->buf; | |
2694 | void *tmpbuf = NULL; | |
2695 | int r, srcu_idx; | |
2696 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
2697 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
2698 | ||
2699 | if (mop->flags & ~supported_flags) | |
2700 | return -EINVAL; | |
2701 | ||
2702 | if (mop->size > MEM_OP_MAX_SIZE) | |
2703 | return -E2BIG; | |
2704 | ||
2705 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
2706 | tmpbuf = vmalloc(mop->size); | |
2707 | if (!tmpbuf) | |
2708 | return -ENOMEM; | |
2709 | } | |
2710 | ||
2711 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2712 | ||
2713 | switch (mop->op) { | |
2714 | case KVM_S390_MEMOP_LOGICAL_READ: | |
2715 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
2716 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
2717 | mop->size, GACC_FETCH); | |
41408c28 TH |
2718 | break; |
2719 | } | |
2720 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2721 | if (r == 0) { | |
2722 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
2723 | r = -EFAULT; | |
2724 | } | |
2725 | break; | |
2726 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
2727 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
2728 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
2729 | mop->size, GACC_STORE); | |
41408c28 TH |
2730 | break; |
2731 | } | |
2732 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
2733 | r = -EFAULT; | |
2734 | break; | |
2735 | } | |
2736 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2737 | break; | |
2738 | default: | |
2739 | r = -EINVAL; | |
2740 | } | |
2741 | ||
2742 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
2743 | ||
2744 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
2745 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
2746 | ||
2747 | vfree(tmpbuf); | |
2748 | return r; | |
2749 | } | |
2750 | ||
b0c632db HC |
2751 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2752 | unsigned int ioctl, unsigned long arg) | |
2753 | { | |
2754 | struct kvm_vcpu *vcpu = filp->private_data; | |
2755 | void __user *argp = (void __user *)arg; | |
800c1065 | 2756 | int idx; |
bc923cc9 | 2757 | long r; |
b0c632db | 2758 | |
93736624 | 2759 | switch (ioctl) { |
47b43c52 JF |
2760 | case KVM_S390_IRQ: { |
2761 | struct kvm_s390_irq s390irq; | |
2762 | ||
2763 | r = -EFAULT; | |
2764 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
2765 | break; | |
2766 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
2767 | break; | |
2768 | } | |
93736624 | 2769 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 2770 | struct kvm_s390_interrupt s390int; |
383d0b05 | 2771 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 2772 | |
93736624 | 2773 | r = -EFAULT; |
ba5c1e9b | 2774 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 2775 | break; |
383d0b05 JF |
2776 | if (s390int_to_s390irq(&s390int, &s390irq)) |
2777 | return -EINVAL; | |
2778 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 2779 | break; |
ba5c1e9b | 2780 | } |
b0c632db | 2781 | case KVM_S390_STORE_STATUS: |
800c1065 | 2782 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 2783 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 2784 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 2785 | break; |
b0c632db HC |
2786 | case KVM_S390_SET_INITIAL_PSW: { |
2787 | psw_t psw; | |
2788 | ||
bc923cc9 | 2789 | r = -EFAULT; |
b0c632db | 2790 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
2791 | break; |
2792 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
2793 | break; | |
b0c632db HC |
2794 | } |
2795 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
2796 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
2797 | break; | |
14eebd91 CO |
2798 | case KVM_SET_ONE_REG: |
2799 | case KVM_GET_ONE_REG: { | |
2800 | struct kvm_one_reg reg; | |
2801 | r = -EFAULT; | |
2802 | if (copy_from_user(®, argp, sizeof(reg))) | |
2803 | break; | |
2804 | if (ioctl == KVM_SET_ONE_REG) | |
2805 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
2806 | else | |
2807 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
2808 | break; | |
2809 | } | |
27e0393f CO |
2810 | #ifdef CONFIG_KVM_S390_UCONTROL |
2811 | case KVM_S390_UCAS_MAP: { | |
2812 | struct kvm_s390_ucas_mapping ucasmap; | |
2813 | ||
2814 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2815 | r = -EFAULT; | |
2816 | break; | |
2817 | } | |
2818 | ||
2819 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2820 | r = -EINVAL; | |
2821 | break; | |
2822 | } | |
2823 | ||
2824 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
2825 | ucasmap.vcpu_addr, ucasmap.length); | |
2826 | break; | |
2827 | } | |
2828 | case KVM_S390_UCAS_UNMAP: { | |
2829 | struct kvm_s390_ucas_mapping ucasmap; | |
2830 | ||
2831 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2832 | r = -EFAULT; | |
2833 | break; | |
2834 | } | |
2835 | ||
2836 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2837 | r = -EINVAL; | |
2838 | break; | |
2839 | } | |
2840 | ||
2841 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
2842 | ucasmap.length); | |
2843 | break; | |
2844 | } | |
2845 | #endif | |
ccc7910f | 2846 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 2847 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
2848 | break; |
2849 | } | |
d6712df9 CH |
2850 | case KVM_ENABLE_CAP: |
2851 | { | |
2852 | struct kvm_enable_cap cap; | |
2853 | r = -EFAULT; | |
2854 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
2855 | break; | |
2856 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
2857 | break; | |
2858 | } | |
41408c28 TH |
2859 | case KVM_S390_MEM_OP: { |
2860 | struct kvm_s390_mem_op mem_op; | |
2861 | ||
2862 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
2863 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
2864 | else | |
2865 | r = -EFAULT; | |
2866 | break; | |
2867 | } | |
816c7667 JF |
2868 | case KVM_S390_SET_IRQ_STATE: { |
2869 | struct kvm_s390_irq_state irq_state; | |
2870 | ||
2871 | r = -EFAULT; | |
2872 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2873 | break; | |
2874 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
2875 | irq_state.len == 0 || | |
2876 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
2877 | r = -EINVAL; | |
2878 | break; | |
2879 | } | |
2880 | r = kvm_s390_set_irq_state(vcpu, | |
2881 | (void __user *) irq_state.buf, | |
2882 | irq_state.len); | |
2883 | break; | |
2884 | } | |
2885 | case KVM_S390_GET_IRQ_STATE: { | |
2886 | struct kvm_s390_irq_state irq_state; | |
2887 | ||
2888 | r = -EFAULT; | |
2889 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2890 | break; | |
2891 | if (irq_state.len == 0) { | |
2892 | r = -EINVAL; | |
2893 | break; | |
2894 | } | |
2895 | r = kvm_s390_get_irq_state(vcpu, | |
2896 | (__u8 __user *) irq_state.buf, | |
2897 | irq_state.len); | |
2898 | break; | |
2899 | } | |
b0c632db | 2900 | default: |
3e6afcf1 | 2901 | r = -ENOTTY; |
b0c632db | 2902 | } |
bc923cc9 | 2903 | return r; |
b0c632db HC |
2904 | } |
2905 | ||
5b1c1493 CO |
2906 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
2907 | { | |
2908 | #ifdef CONFIG_KVM_S390_UCONTROL | |
2909 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
2910 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
2911 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
2912 | get_page(vmf->page); | |
2913 | return 0; | |
2914 | } | |
2915 | #endif | |
2916 | return VM_FAULT_SIGBUS; | |
2917 | } | |
2918 | ||
5587027c AK |
2919 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
2920 | unsigned long npages) | |
db3fe4eb TY |
2921 | { |
2922 | return 0; | |
2923 | } | |
2924 | ||
b0c632db | 2925 | /* Section: memory related */ |
f7784b8e MT |
2926 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
2927 | struct kvm_memory_slot *memslot, | |
09170a49 | 2928 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 2929 | enum kvm_mr_change change) |
b0c632db | 2930 | { |
dd2887e7 NW |
2931 | /* A few sanity checks. We can have memory slots which have to be |
2932 | located/ended at a segment boundary (1MB). The memory in userland is | |
2933 | ok to be fragmented into various different vmas. It is okay to mmap() | |
2934 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 2935 | |
598841ca | 2936 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
2937 | return -EINVAL; |
2938 | ||
598841ca | 2939 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
2940 | return -EINVAL; |
2941 | ||
a3a92c31 DD |
2942 | if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit) |
2943 | return -EINVAL; | |
2944 | ||
f7784b8e MT |
2945 | return 0; |
2946 | } | |
2947 | ||
2948 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 2949 | const struct kvm_userspace_memory_region *mem, |
8482644a | 2950 | const struct kvm_memory_slot *old, |
f36f3f28 | 2951 | const struct kvm_memory_slot *new, |
8482644a | 2952 | enum kvm_mr_change change) |
f7784b8e | 2953 | { |
f7850c92 | 2954 | int rc; |
f7784b8e | 2955 | |
2cef4deb CB |
2956 | /* If the basics of the memslot do not change, we do not want |
2957 | * to update the gmap. Every update causes several unnecessary | |
2958 | * segment translation exceptions. This is usually handled just | |
2959 | * fine by the normal fault handler + gmap, but it will also | |
2960 | * cause faults on the prefix page of running guest CPUs. | |
2961 | */ | |
2962 | if (old->userspace_addr == mem->userspace_addr && | |
2963 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
2964 | old->npages * PAGE_SIZE == mem->memory_size) | |
2965 | return; | |
598841ca CO |
2966 | |
2967 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
2968 | mem->guest_phys_addr, mem->memory_size); | |
2969 | if (rc) | |
ea2cdd27 | 2970 | pr_warn("failed to commit memory region\n"); |
598841ca | 2971 | return; |
b0c632db HC |
2972 | } |
2973 | ||
b0c632db HC |
2974 | static int __init kvm_s390_init(void) |
2975 | { | |
07197fd0 DH |
2976 | if (!sclp.has_sief2) { |
2977 | pr_info("SIE not available\n"); | |
2978 | return -ENODEV; | |
2979 | } | |
2980 | ||
9d8d5786 | 2981 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
2982 | } |
2983 | ||
2984 | static void __exit kvm_s390_exit(void) | |
2985 | { | |
2986 | kvm_exit(); | |
2987 | } | |
2988 | ||
2989 | module_init(kvm_s390_init); | |
2990 | module_exit(kvm_s390_exit); | |
566af940 CH |
2991 | |
2992 | /* | |
2993 | * Enable autoloading of the kvm module. | |
2994 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
2995 | * since x86 takes a different approach. | |
2996 | */ | |
2997 | #include <linux/miscdevice.h> | |
2998 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
2999 | MODULE_ALIAS("devname:kvm"); |