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Commit | Line | Data |
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b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
15f36ebd | 14 | * Jason J. Herne <jjherne@us.ibm.com> |
b0c632db HC |
15 | */ |
16 | ||
17 | #include <linux/compiler.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/fs.h> | |
ca872302 | 20 | #include <linux/hrtimer.h> |
b0c632db HC |
21 | #include <linux/init.h> |
22 | #include <linux/kvm.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/module.h> | |
a374e892 | 25 | #include <linux/random.h> |
b0c632db | 26 | #include <linux/slab.h> |
ba5c1e9b | 27 | #include <linux/timer.h> |
41408c28 | 28 | #include <linux/vmalloc.h> |
15c9705f | 29 | #include <linux/bitmap.h> |
cbb870c8 | 30 | #include <asm/asm-offsets.h> |
b0c632db | 31 | #include <asm/lowcore.h> |
fdf03650 | 32 | #include <asm/etr.h> |
b0c632db | 33 | #include <asm/pgtable.h> |
1e133ab2 | 34 | #include <asm/gmap.h> |
f5daba1d | 35 | #include <asm/nmi.h> |
a0616cde | 36 | #include <asm/switch_to.h> |
6d3da241 | 37 | #include <asm/isc.h> |
1526bf9c | 38 | #include <asm/sclp.h> |
0a763c78 DH |
39 | #include <asm/cpacf.h> |
40 | #include <asm/etr.h> | |
8f2abe6a | 41 | #include "kvm-s390.h" |
b0c632db HC |
42 | #include "gaccess.h" |
43 | ||
ea2cdd27 DH |
44 | #define KMSG_COMPONENT "kvm-s390" |
45 | #undef pr_fmt | |
46 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
47 | ||
5786fffa CH |
48 | #define CREATE_TRACE_POINTS |
49 | #include "trace.h" | |
ade38c31 | 50 | #include "trace-s390.h" |
5786fffa | 51 | |
41408c28 | 52 | #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
816c7667 JF |
53 | #define LOCAL_IRQS 32 |
54 | #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ | |
55 | (KVM_MAX_VCPUS + LOCAL_IRQS)) | |
41408c28 | 56 | |
b0c632db HC |
57 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
58 | ||
59 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
60 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 61 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
62 | { "exit_validity", VCPU_STAT(exit_validity) }, |
63 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
64 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
65 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
66 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
67 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
68 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
a011eeb2 | 69 | { "exit_operation_exception", VCPU_STAT(exit_operation_exception) }, |
f7819512 | 70 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 71 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 72 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ce2e4f0b | 73 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 74 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 75 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
76 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
77 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 78 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 79 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
80 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
81 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
82 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
83 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
84 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
85 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
86 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 87 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
88 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
89 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
90 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
91 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
92 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 93 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
94 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
95 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 96 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
97 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
98 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 99 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
95ca2cb5 | 100 | { "instruction_sthyi", VCPU_STAT(instruction_sthyi) }, |
5288fbf0 | 101 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 102 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 103 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 104 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
105 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
106 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 107 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
108 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
109 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 110 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
111 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
112 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
113 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
114 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
115 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
116 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 117 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 118 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 119 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
175a5c9e CB |
120 | { "diagnose_258", VCPU_STAT(diagnose_258) }, |
121 | { "diagnose_308", VCPU_STAT(diagnose_308) }, | |
122 | { "diagnose_500", VCPU_STAT(diagnose_500) }, | |
b0c632db HC |
123 | { NULL } |
124 | }; | |
125 | ||
9d8d5786 | 126 | /* upper facilities limit for kvm */ |
60a37709 AY |
127 | unsigned long kvm_s390_fac_list_mask[16] = { |
128 | 0xffe6000000000000UL, | |
129 | 0x005e000000000000UL, | |
9d8d5786 | 130 | }; |
b0c632db | 131 | |
9d8d5786 | 132 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 133 | { |
9d8d5786 MM |
134 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
135 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
136 | } |
137 | ||
15c9705f DH |
138 | /* available cpu features supported by kvm */ |
139 | static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); | |
0a763c78 DH |
140 | /* available subfunctions indicated via query / "test bit" */ |
141 | static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc; | |
15c9705f | 142 | |
9d8d5786 | 143 | static struct gmap_notifier gmap_notifier; |
78f26131 | 144 | debug_info_t *kvm_s390_dbf; |
9d8d5786 | 145 | |
b0c632db | 146 | /* Section: not file related */ |
13a34e06 | 147 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
148 | { |
149 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 150 | return 0; |
b0c632db HC |
151 | } |
152 | ||
414d3b07 MS |
153 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
154 | unsigned long end); | |
2c70fe44 | 155 | |
fdf03650 FZ |
156 | /* |
157 | * This callback is executed during stop_machine(). All CPUs are therefore | |
158 | * temporarily stopped. In order not to change guest behavior, we have to | |
159 | * disable preemption whenever we touch the epoch of kvm and the VCPUs, | |
160 | * so a CPU won't be stopped while calculating with the epoch. | |
161 | */ | |
162 | static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, | |
163 | void *v) | |
164 | { | |
165 | struct kvm *kvm; | |
166 | struct kvm_vcpu *vcpu; | |
167 | int i; | |
168 | unsigned long long *delta = v; | |
169 | ||
170 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
171 | kvm->arch.epoch -= *delta; | |
172 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
173 | vcpu->arch.sie_block->epoch -= *delta; | |
db0758b2 DH |
174 | if (vcpu->arch.cputm_enabled) |
175 | vcpu->arch.cputm_start += *delta; | |
fdf03650 FZ |
176 | } |
177 | } | |
178 | return NOTIFY_OK; | |
179 | } | |
180 | ||
181 | static struct notifier_block kvm_clock_notifier = { | |
182 | .notifier_call = kvm_clock_sync, | |
183 | }; | |
184 | ||
b0c632db HC |
185 | int kvm_arch_hardware_setup(void) |
186 | { | |
2c70fe44 CB |
187 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
188 | gmap_register_ipte_notifier(&gmap_notifier); | |
fdf03650 FZ |
189 | atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
190 | &kvm_clock_notifier); | |
b0c632db HC |
191 | return 0; |
192 | } | |
193 | ||
194 | void kvm_arch_hardware_unsetup(void) | |
195 | { | |
2c70fe44 | 196 | gmap_unregister_ipte_notifier(&gmap_notifier); |
fdf03650 FZ |
197 | atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
198 | &kvm_clock_notifier); | |
b0c632db HC |
199 | } |
200 | ||
22be5a13 DH |
201 | static void allow_cpu_feat(unsigned long nr) |
202 | { | |
203 | set_bit_inv(nr, kvm_s390_available_cpu_feat); | |
204 | } | |
205 | ||
0a763c78 DH |
206 | static inline int plo_test_bit(unsigned char nr) |
207 | { | |
208 | register unsigned long r0 asm("0") = (unsigned long) nr | 0x100; | |
209 | int cc = 3; /* subfunction not available */ | |
210 | ||
211 | asm volatile( | |
212 | /* Parameter registers are ignored for "test bit" */ | |
213 | " plo 0,0,0,0(0)\n" | |
214 | " ipm %0\n" | |
215 | " srl %0,28\n" | |
216 | : "=d" (cc) | |
217 | : "d" (r0) | |
218 | : "cc"); | |
219 | return cc == 0; | |
220 | } | |
221 | ||
22be5a13 DH |
222 | static void kvm_s390_cpu_feat_init(void) |
223 | { | |
0a763c78 DH |
224 | int i; |
225 | ||
226 | for (i = 0; i < 256; ++i) { | |
227 | if (plo_test_bit(i)) | |
228 | kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7); | |
229 | } | |
230 | ||
231 | if (test_facility(28)) /* TOD-clock steering */ | |
232 | etr_ptff(kvm_s390_available_subfunc.ptff, ETR_PTFF_QAF); | |
233 | ||
234 | if (test_facility(17)) { /* MSA */ | |
235 | __cpacf_query(CPACF_KMAC, kvm_s390_available_subfunc.kmac); | |
236 | __cpacf_query(CPACF_KMC, kvm_s390_available_subfunc.kmc); | |
237 | __cpacf_query(CPACF_KM, kvm_s390_available_subfunc.km); | |
238 | __cpacf_query(CPACF_KIMD, kvm_s390_available_subfunc.kimd); | |
239 | __cpacf_query(CPACF_KLMD, kvm_s390_available_subfunc.klmd); | |
240 | } | |
241 | if (test_facility(76)) /* MSA3 */ | |
242 | __cpacf_query(CPACF_PCKMO, kvm_s390_available_subfunc.pckmo); | |
243 | if (test_facility(77)) { /* MSA4 */ | |
244 | __cpacf_query(CPACF_KMCTR, kvm_s390_available_subfunc.kmctr); | |
245 | __cpacf_query(CPACF_KMF, kvm_s390_available_subfunc.kmf); | |
246 | __cpacf_query(CPACF_KMO, kvm_s390_available_subfunc.kmo); | |
247 | __cpacf_query(CPACF_PCC, kvm_s390_available_subfunc.pcc); | |
248 | } | |
249 | if (test_facility(57)) /* MSA5 */ | |
250 | __cpacf_query(CPACF_PPNO, kvm_s390_available_subfunc.ppno); | |
251 | ||
22be5a13 DH |
252 | if (MACHINE_HAS_ESOP) |
253 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP); | |
254 | } | |
255 | ||
b0c632db HC |
256 | int kvm_arch_init(void *opaque) |
257 | { | |
78f26131 CB |
258 | kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
259 | if (!kvm_s390_dbf) | |
260 | return -ENOMEM; | |
261 | ||
262 | if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) { | |
263 | debug_unregister(kvm_s390_dbf); | |
264 | return -ENOMEM; | |
265 | } | |
266 | ||
22be5a13 DH |
267 | kvm_s390_cpu_feat_init(); |
268 | ||
84877d93 CH |
269 | /* Register floating interrupt controller interface. */ |
270 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
271 | } |
272 | ||
78f26131 CB |
273 | void kvm_arch_exit(void) |
274 | { | |
275 | debug_unregister(kvm_s390_dbf); | |
276 | } | |
277 | ||
b0c632db HC |
278 | /* Section: device related */ |
279 | long kvm_arch_dev_ioctl(struct file *filp, | |
280 | unsigned int ioctl, unsigned long arg) | |
281 | { | |
282 | if (ioctl == KVM_S390_ENABLE_SIE) | |
283 | return s390_enable_sie(); | |
284 | return -EINVAL; | |
285 | } | |
286 | ||
784aa3d7 | 287 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 288 | { |
d7b0b5eb CO |
289 | int r; |
290 | ||
2bd0ac4e | 291 | switch (ext) { |
d7b0b5eb | 292 | case KVM_CAP_S390_PSW: |
b6cf8788 | 293 | case KVM_CAP_S390_GMAP: |
52e16b18 | 294 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
295 | #ifdef CONFIG_KVM_S390_UCONTROL |
296 | case KVM_CAP_S390_UCONTROL: | |
297 | #endif | |
3c038e6b | 298 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 299 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 300 | case KVM_CAP_ONE_REG: |
d6712df9 | 301 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 302 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 303 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 304 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 305 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 306 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 307 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 308 | case KVM_CAP_MP_STATE: |
47b43c52 | 309 | case KVM_CAP_S390_INJECT_IRQ: |
2444b352 | 310 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 311 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 312 | case KVM_CAP_S390_SKEYS: |
816c7667 | 313 | case KVM_CAP_S390_IRQ_STATE: |
d7b0b5eb CO |
314 | r = 1; |
315 | break; | |
41408c28 TH |
316 | case KVM_CAP_S390_MEM_OP: |
317 | r = MEM_OP_MAX_SIZE; | |
318 | break; | |
e726b1bd CB |
319 | case KVM_CAP_NR_VCPUS: |
320 | case KVM_CAP_MAX_VCPUS: | |
76a6dd72 DH |
321 | r = KVM_S390_BSCA_CPU_SLOTS; |
322 | if (sclp.has_esca && sclp.has_64bscao) | |
323 | r = KVM_S390_ESCA_CPU_SLOTS; | |
e726b1bd | 324 | break; |
e1e2e605 NW |
325 | case KVM_CAP_NR_MEMSLOTS: |
326 | r = KVM_USER_MEM_SLOTS; | |
327 | break; | |
1526bf9c | 328 | case KVM_CAP_S390_COW: |
abf09bed | 329 | r = MACHINE_HAS_ESOP; |
1526bf9c | 330 | break; |
68c55750 EF |
331 | case KVM_CAP_S390_VECTOR_REGISTERS: |
332 | r = MACHINE_HAS_VX; | |
333 | break; | |
c6e5f166 FZ |
334 | case KVM_CAP_S390_RI: |
335 | r = test_facility(64); | |
336 | break; | |
2bd0ac4e | 337 | default: |
d7b0b5eb | 338 | r = 0; |
2bd0ac4e | 339 | } |
d7b0b5eb | 340 | return r; |
b0c632db HC |
341 | } |
342 | ||
15f36ebd JH |
343 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
344 | struct kvm_memory_slot *memslot) | |
345 | { | |
346 | gfn_t cur_gfn, last_gfn; | |
347 | unsigned long address; | |
348 | struct gmap *gmap = kvm->arch.gmap; | |
349 | ||
15f36ebd JH |
350 | /* Loop over all guest pages */ |
351 | last_gfn = memslot->base_gfn + memslot->npages; | |
352 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
353 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
354 | ||
1e133ab2 | 355 | if (test_and_clear_guest_dirty(gmap->mm, address)) |
15f36ebd | 356 | mark_page_dirty(kvm, cur_gfn); |
1763f8d0 CB |
357 | if (fatal_signal_pending(current)) |
358 | return; | |
70c88a00 | 359 | cond_resched(); |
15f36ebd | 360 | } |
15f36ebd JH |
361 | } |
362 | ||
b0c632db | 363 | /* Section: vm related */ |
a6e2f683 ED |
364 | static void sca_del_vcpu(struct kvm_vcpu *vcpu); |
365 | ||
b0c632db HC |
366 | /* |
367 | * Get (and clear) the dirty memory log for a memory slot. | |
368 | */ | |
369 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
370 | struct kvm_dirty_log *log) | |
371 | { | |
15f36ebd JH |
372 | int r; |
373 | unsigned long n; | |
9f6b8029 | 374 | struct kvm_memslots *slots; |
15f36ebd JH |
375 | struct kvm_memory_slot *memslot; |
376 | int is_dirty = 0; | |
377 | ||
378 | mutex_lock(&kvm->slots_lock); | |
379 | ||
380 | r = -EINVAL; | |
381 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
382 | goto out; | |
383 | ||
9f6b8029 PB |
384 | slots = kvm_memslots(kvm); |
385 | memslot = id_to_memslot(slots, log->slot); | |
15f36ebd JH |
386 | r = -ENOENT; |
387 | if (!memslot->dirty_bitmap) | |
388 | goto out; | |
389 | ||
390 | kvm_s390_sync_dirty_log(kvm, memslot); | |
391 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
392 | if (r) | |
393 | goto out; | |
394 | ||
395 | /* Clear the dirty log */ | |
396 | if (is_dirty) { | |
397 | n = kvm_dirty_bitmap_bytes(memslot); | |
398 | memset(memslot->dirty_bitmap, 0, n); | |
399 | } | |
400 | r = 0; | |
401 | out: | |
402 | mutex_unlock(&kvm->slots_lock); | |
403 | return r; | |
b0c632db HC |
404 | } |
405 | ||
d938dc55 CH |
406 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
407 | { | |
408 | int r; | |
409 | ||
410 | if (cap->flags) | |
411 | return -EINVAL; | |
412 | ||
413 | switch (cap->cap) { | |
84223598 | 414 | case KVM_CAP_S390_IRQCHIP: |
c92ea7b9 | 415 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
84223598 CH |
416 | kvm->arch.use_irqchip = 1; |
417 | r = 0; | |
418 | break; | |
2444b352 | 419 | case KVM_CAP_S390_USER_SIGP: |
c92ea7b9 | 420 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
2444b352 DH |
421 | kvm->arch.user_sigp = 1; |
422 | r = 0; | |
423 | break; | |
68c55750 | 424 | case KVM_CAP_S390_VECTOR_REGISTERS: |
5967c17b | 425 | mutex_lock(&kvm->lock); |
a03825bb | 426 | if (kvm->created_vcpus) { |
5967c17b DH |
427 | r = -EBUSY; |
428 | } else if (MACHINE_HAS_VX) { | |
c54f0d6a DH |
429 | set_kvm_facility(kvm->arch.model.fac_mask, 129); |
430 | set_kvm_facility(kvm->arch.model.fac_list, 129); | |
18280d8b MM |
431 | r = 0; |
432 | } else | |
433 | r = -EINVAL; | |
5967c17b | 434 | mutex_unlock(&kvm->lock); |
c92ea7b9 CB |
435 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
436 | r ? "(not available)" : "(success)"); | |
68c55750 | 437 | break; |
c6e5f166 FZ |
438 | case KVM_CAP_S390_RI: |
439 | r = -EINVAL; | |
440 | mutex_lock(&kvm->lock); | |
a03825bb | 441 | if (kvm->created_vcpus) { |
c6e5f166 FZ |
442 | r = -EBUSY; |
443 | } else if (test_facility(64)) { | |
c54f0d6a DH |
444 | set_kvm_facility(kvm->arch.model.fac_mask, 64); |
445 | set_kvm_facility(kvm->arch.model.fac_list, 64); | |
c6e5f166 FZ |
446 | r = 0; |
447 | } | |
448 | mutex_unlock(&kvm->lock); | |
449 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s", | |
450 | r ? "(not available)" : "(success)"); | |
451 | break; | |
e44fc8c9 | 452 | case KVM_CAP_S390_USER_STSI: |
c92ea7b9 | 453 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
e44fc8c9 ET |
454 | kvm->arch.user_stsi = 1; |
455 | r = 0; | |
456 | break; | |
d938dc55 CH |
457 | default: |
458 | r = -EINVAL; | |
459 | break; | |
460 | } | |
461 | return r; | |
462 | } | |
463 | ||
8c0a7ce6 DD |
464 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
465 | { | |
466 | int ret; | |
467 | ||
468 | switch (attr->attr) { | |
469 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
470 | ret = 0; | |
c92ea7b9 | 471 | VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
a3a92c31 DD |
472 | kvm->arch.mem_limit); |
473 | if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr)) | |
8c0a7ce6 DD |
474 | ret = -EFAULT; |
475 | break; | |
476 | default: | |
477 | ret = -ENXIO; | |
478 | break; | |
479 | } | |
480 | return ret; | |
481 | } | |
482 | ||
483 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
484 | { |
485 | int ret; | |
486 | unsigned int idx; | |
487 | switch (attr->attr) { | |
488 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
f9cbd9b0 | 489 | ret = -ENXIO; |
c24cc9c8 | 490 | if (!sclp.has_cmma) |
e6db1d61 DD |
491 | break; |
492 | ||
4f718eab | 493 | ret = -EBUSY; |
c92ea7b9 | 494 | VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
4f718eab | 495 | mutex_lock(&kvm->lock); |
a03825bb | 496 | if (!kvm->created_vcpus) { |
4f718eab DD |
497 | kvm->arch.use_cmma = 1; |
498 | ret = 0; | |
499 | } | |
500 | mutex_unlock(&kvm->lock); | |
501 | break; | |
502 | case KVM_S390_VM_MEM_CLR_CMMA: | |
f9cbd9b0 DH |
503 | ret = -ENXIO; |
504 | if (!sclp.has_cmma) | |
505 | break; | |
c3489155 DD |
506 | ret = -EINVAL; |
507 | if (!kvm->arch.use_cmma) | |
508 | break; | |
509 | ||
c92ea7b9 | 510 | VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
4f718eab DD |
511 | mutex_lock(&kvm->lock); |
512 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 513 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
514 | srcu_read_unlock(&kvm->srcu, idx); |
515 | mutex_unlock(&kvm->lock); | |
516 | ret = 0; | |
517 | break; | |
8c0a7ce6 DD |
518 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
519 | unsigned long new_limit; | |
520 | ||
521 | if (kvm_is_ucontrol(kvm)) | |
522 | return -EINVAL; | |
523 | ||
524 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
525 | return -EFAULT; | |
526 | ||
a3a92c31 DD |
527 | if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT && |
528 | new_limit > kvm->arch.mem_limit) | |
8c0a7ce6 DD |
529 | return -E2BIG; |
530 | ||
a3a92c31 DD |
531 | if (!new_limit) |
532 | return -EINVAL; | |
533 | ||
534 | /* gmap_alloc takes last usable address */ | |
535 | if (new_limit != KVM_S390_NO_MEM_LIMIT) | |
536 | new_limit -= 1; | |
537 | ||
8c0a7ce6 DD |
538 | ret = -EBUSY; |
539 | mutex_lock(&kvm->lock); | |
a03825bb | 540 | if (!kvm->created_vcpus) { |
8c0a7ce6 DD |
541 | /* gmap_alloc will round the limit up */ |
542 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
543 | ||
544 | if (!new) { | |
545 | ret = -ENOMEM; | |
546 | } else { | |
547 | gmap_free(kvm->arch.gmap); | |
548 | new->private = kvm; | |
549 | kvm->arch.gmap = new; | |
550 | ret = 0; | |
551 | } | |
552 | } | |
553 | mutex_unlock(&kvm->lock); | |
a3a92c31 DD |
554 | VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit); |
555 | VM_EVENT(kvm, 3, "New guest asce: 0x%pK", | |
556 | (void *) kvm->arch.gmap->asce); | |
8c0a7ce6 DD |
557 | break; |
558 | } | |
4f718eab DD |
559 | default: |
560 | ret = -ENXIO; | |
561 | break; | |
562 | } | |
563 | return ret; | |
564 | } | |
565 | ||
a374e892 TK |
566 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
567 | ||
568 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
569 | { | |
570 | struct kvm_vcpu *vcpu; | |
571 | int i; | |
572 | ||
9d8d5786 | 573 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
574 | return -EINVAL; |
575 | ||
576 | mutex_lock(&kvm->lock); | |
577 | switch (attr->attr) { | |
578 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
579 | get_random_bytes( | |
580 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
581 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
582 | kvm->arch.crypto.aes_kw = 1; | |
c92ea7b9 | 583 | VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
a374e892 TK |
584 | break; |
585 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
586 | get_random_bytes( | |
587 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
588 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
589 | kvm->arch.crypto.dea_kw = 1; | |
c92ea7b9 | 590 | VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
a374e892 TK |
591 | break; |
592 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
593 | kvm->arch.crypto.aes_kw = 0; | |
594 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
595 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
c92ea7b9 | 596 | VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
a374e892 TK |
597 | break; |
598 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
599 | kvm->arch.crypto.dea_kw = 0; | |
600 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
601 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
c92ea7b9 | 602 | VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
a374e892 TK |
603 | break; |
604 | default: | |
605 | mutex_unlock(&kvm->lock); | |
606 | return -ENXIO; | |
607 | } | |
608 | ||
609 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
610 | kvm_s390_vcpu_crypto_setup(vcpu); | |
611 | exit_sie(vcpu); | |
612 | } | |
613 | mutex_unlock(&kvm->lock); | |
614 | return 0; | |
615 | } | |
616 | ||
72f25020 JH |
617 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
618 | { | |
619 | u8 gtod_high; | |
620 | ||
621 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
622 | sizeof(gtod_high))) | |
623 | return -EFAULT; | |
624 | ||
625 | if (gtod_high != 0) | |
626 | return -EINVAL; | |
58c383c6 | 627 | VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
628 | |
629 | return 0; | |
630 | } | |
631 | ||
632 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
633 | { | |
5a3d883a | 634 | u64 gtod; |
72f25020 JH |
635 | |
636 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
637 | return -EFAULT; | |
638 | ||
25ed1675 | 639 | kvm_s390_set_tod_clock(kvm, gtod); |
58c383c6 | 640 | VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod); |
72f25020 JH |
641 | return 0; |
642 | } | |
643 | ||
644 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
645 | { | |
646 | int ret; | |
647 | ||
648 | if (attr->flags) | |
649 | return -EINVAL; | |
650 | ||
651 | switch (attr->attr) { | |
652 | case KVM_S390_VM_TOD_HIGH: | |
653 | ret = kvm_s390_set_tod_high(kvm, attr); | |
654 | break; | |
655 | case KVM_S390_VM_TOD_LOW: | |
656 | ret = kvm_s390_set_tod_low(kvm, attr); | |
657 | break; | |
658 | default: | |
659 | ret = -ENXIO; | |
660 | break; | |
661 | } | |
662 | return ret; | |
663 | } | |
664 | ||
665 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
666 | { | |
667 | u8 gtod_high = 0; | |
668 | ||
669 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
670 | sizeof(gtod_high))) | |
671 | return -EFAULT; | |
58c383c6 | 672 | VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
673 | |
674 | return 0; | |
675 | } | |
676 | ||
677 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
678 | { | |
5a3d883a | 679 | u64 gtod; |
72f25020 | 680 | |
60417fcc | 681 | gtod = kvm_s390_get_tod_clock_fast(kvm); |
72f25020 JH |
682 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
683 | return -EFAULT; | |
58c383c6 | 684 | VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
72f25020 JH |
685 | |
686 | return 0; | |
687 | } | |
688 | ||
689 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
690 | { | |
691 | int ret; | |
692 | ||
693 | if (attr->flags) | |
694 | return -EINVAL; | |
695 | ||
696 | switch (attr->attr) { | |
697 | case KVM_S390_VM_TOD_HIGH: | |
698 | ret = kvm_s390_get_tod_high(kvm, attr); | |
699 | break; | |
700 | case KVM_S390_VM_TOD_LOW: | |
701 | ret = kvm_s390_get_tod_low(kvm, attr); | |
702 | break; | |
703 | default: | |
704 | ret = -ENXIO; | |
705 | break; | |
706 | } | |
707 | return ret; | |
708 | } | |
709 | ||
658b6eda MM |
710 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
711 | { | |
712 | struct kvm_s390_vm_cpu_processor *proc; | |
053dd230 | 713 | u16 lowest_ibc, unblocked_ibc; |
658b6eda MM |
714 | int ret = 0; |
715 | ||
716 | mutex_lock(&kvm->lock); | |
a03825bb | 717 | if (kvm->created_vcpus) { |
658b6eda MM |
718 | ret = -EBUSY; |
719 | goto out; | |
720 | } | |
721 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
722 | if (!proc) { | |
723 | ret = -ENOMEM; | |
724 | goto out; | |
725 | } | |
726 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
727 | sizeof(*proc))) { | |
9bb0ec09 | 728 | kvm->arch.model.cpuid = proc->cpuid; |
053dd230 DH |
729 | lowest_ibc = sclp.ibc >> 16 & 0xfff; |
730 | unblocked_ibc = sclp.ibc & 0xfff; | |
731 | if (lowest_ibc) { | |
732 | if (proc->ibc > unblocked_ibc) | |
733 | kvm->arch.model.ibc = unblocked_ibc; | |
734 | else if (proc->ibc < lowest_ibc) | |
735 | kvm->arch.model.ibc = lowest_ibc; | |
736 | else | |
737 | kvm->arch.model.ibc = proc->ibc; | |
738 | } | |
c54f0d6a | 739 | memcpy(kvm->arch.model.fac_list, proc->fac_list, |
658b6eda MM |
740 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
741 | } else | |
742 | ret = -EFAULT; | |
743 | kfree(proc); | |
744 | out: | |
745 | mutex_unlock(&kvm->lock); | |
746 | return ret; | |
747 | } | |
748 | ||
15c9705f DH |
749 | static int kvm_s390_set_processor_feat(struct kvm *kvm, |
750 | struct kvm_device_attr *attr) | |
751 | { | |
752 | struct kvm_s390_vm_cpu_feat data; | |
753 | int ret = -EBUSY; | |
754 | ||
755 | if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data))) | |
756 | return -EFAULT; | |
757 | if (!bitmap_subset((unsigned long *) data.feat, | |
758 | kvm_s390_available_cpu_feat, | |
759 | KVM_S390_VM_CPU_FEAT_NR_BITS)) | |
760 | return -EINVAL; | |
761 | ||
762 | mutex_lock(&kvm->lock); | |
763 | if (!atomic_read(&kvm->online_vcpus)) { | |
764 | bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat, | |
765 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
766 | ret = 0; | |
767 | } | |
768 | mutex_unlock(&kvm->lock); | |
769 | return ret; | |
770 | } | |
771 | ||
0a763c78 DH |
772 | static int kvm_s390_set_processor_subfunc(struct kvm *kvm, |
773 | struct kvm_device_attr *attr) | |
774 | { | |
775 | /* | |
776 | * Once supported by kernel + hw, we have to store the subfunctions | |
777 | * in kvm->arch and remember that user space configured them. | |
778 | */ | |
779 | return -ENXIO; | |
780 | } | |
781 | ||
658b6eda MM |
782 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
783 | { | |
784 | int ret = -ENXIO; | |
785 | ||
786 | switch (attr->attr) { | |
787 | case KVM_S390_VM_CPU_PROCESSOR: | |
788 | ret = kvm_s390_set_processor(kvm, attr); | |
789 | break; | |
15c9705f DH |
790 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
791 | ret = kvm_s390_set_processor_feat(kvm, attr); | |
792 | break; | |
0a763c78 DH |
793 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
794 | ret = kvm_s390_set_processor_subfunc(kvm, attr); | |
795 | break; | |
658b6eda MM |
796 | } |
797 | return ret; | |
798 | } | |
799 | ||
800 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
801 | { | |
802 | struct kvm_s390_vm_cpu_processor *proc; | |
803 | int ret = 0; | |
804 | ||
805 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
806 | if (!proc) { | |
807 | ret = -ENOMEM; | |
808 | goto out; | |
809 | } | |
9bb0ec09 | 810 | proc->cpuid = kvm->arch.model.cpuid; |
658b6eda | 811 | proc->ibc = kvm->arch.model.ibc; |
c54f0d6a DH |
812 | memcpy(&proc->fac_list, kvm->arch.model.fac_list, |
813 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda MM |
814 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
815 | ret = -EFAULT; | |
816 | kfree(proc); | |
817 | out: | |
818 | return ret; | |
819 | } | |
820 | ||
821 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
822 | { | |
823 | struct kvm_s390_vm_cpu_machine *mach; | |
824 | int ret = 0; | |
825 | ||
826 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
827 | if (!mach) { | |
828 | ret = -ENOMEM; | |
829 | goto out; | |
830 | } | |
831 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 832 | mach->ibc = sclp.ibc; |
c54f0d6a | 833 | memcpy(&mach->fac_mask, kvm->arch.model.fac_mask, |
981467c9 | 834 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda | 835 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 836 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
837 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
838 | ret = -EFAULT; | |
839 | kfree(mach); | |
840 | out: | |
841 | return ret; | |
842 | } | |
843 | ||
15c9705f DH |
844 | static int kvm_s390_get_processor_feat(struct kvm *kvm, |
845 | struct kvm_device_attr *attr) | |
846 | { | |
847 | struct kvm_s390_vm_cpu_feat data; | |
848 | ||
849 | bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat, | |
850 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
851 | if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) | |
852 | return -EFAULT; | |
853 | return 0; | |
854 | } | |
855 | ||
856 | static int kvm_s390_get_machine_feat(struct kvm *kvm, | |
857 | struct kvm_device_attr *attr) | |
858 | { | |
859 | struct kvm_s390_vm_cpu_feat data; | |
860 | ||
861 | bitmap_copy((unsigned long *) data.feat, | |
862 | kvm_s390_available_cpu_feat, | |
863 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
864 | if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) | |
865 | return -EFAULT; | |
866 | return 0; | |
867 | } | |
868 | ||
0a763c78 DH |
869 | static int kvm_s390_get_processor_subfunc(struct kvm *kvm, |
870 | struct kvm_device_attr *attr) | |
871 | { | |
872 | /* | |
873 | * Once we can actually configure subfunctions (kernel + hw support), | |
874 | * we have to check if they were already set by user space, if so copy | |
875 | * them from kvm->arch. | |
876 | */ | |
877 | return -ENXIO; | |
878 | } | |
879 | ||
880 | static int kvm_s390_get_machine_subfunc(struct kvm *kvm, | |
881 | struct kvm_device_attr *attr) | |
882 | { | |
883 | if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc, | |
884 | sizeof(struct kvm_s390_vm_cpu_subfunc))) | |
885 | return -EFAULT; | |
886 | return 0; | |
887 | } | |
658b6eda MM |
888 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
889 | { | |
890 | int ret = -ENXIO; | |
891 | ||
892 | switch (attr->attr) { | |
893 | case KVM_S390_VM_CPU_PROCESSOR: | |
894 | ret = kvm_s390_get_processor(kvm, attr); | |
895 | break; | |
896 | case KVM_S390_VM_CPU_MACHINE: | |
897 | ret = kvm_s390_get_machine(kvm, attr); | |
898 | break; | |
15c9705f DH |
899 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
900 | ret = kvm_s390_get_processor_feat(kvm, attr); | |
901 | break; | |
902 | case KVM_S390_VM_CPU_MACHINE_FEAT: | |
903 | ret = kvm_s390_get_machine_feat(kvm, attr); | |
904 | break; | |
0a763c78 DH |
905 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
906 | ret = kvm_s390_get_processor_subfunc(kvm, attr); | |
907 | break; | |
908 | case KVM_S390_VM_CPU_MACHINE_SUBFUNC: | |
909 | ret = kvm_s390_get_machine_subfunc(kvm, attr); | |
910 | break; | |
658b6eda MM |
911 | } |
912 | return ret; | |
913 | } | |
914 | ||
f2061656 DD |
915 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
916 | { | |
917 | int ret; | |
918 | ||
919 | switch (attr->group) { | |
4f718eab | 920 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 921 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 922 | break; |
72f25020 JH |
923 | case KVM_S390_VM_TOD: |
924 | ret = kvm_s390_set_tod(kvm, attr); | |
925 | break; | |
658b6eda MM |
926 | case KVM_S390_VM_CPU_MODEL: |
927 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
928 | break; | |
a374e892 TK |
929 | case KVM_S390_VM_CRYPTO: |
930 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
931 | break; | |
f2061656 DD |
932 | default: |
933 | ret = -ENXIO; | |
934 | break; | |
935 | } | |
936 | ||
937 | return ret; | |
938 | } | |
939 | ||
940 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
941 | { | |
8c0a7ce6 DD |
942 | int ret; |
943 | ||
944 | switch (attr->group) { | |
945 | case KVM_S390_VM_MEM_CTRL: | |
946 | ret = kvm_s390_get_mem_control(kvm, attr); | |
947 | break; | |
72f25020 JH |
948 | case KVM_S390_VM_TOD: |
949 | ret = kvm_s390_get_tod(kvm, attr); | |
950 | break; | |
658b6eda MM |
951 | case KVM_S390_VM_CPU_MODEL: |
952 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
953 | break; | |
8c0a7ce6 DD |
954 | default: |
955 | ret = -ENXIO; | |
956 | break; | |
957 | } | |
958 | ||
959 | return ret; | |
f2061656 DD |
960 | } |
961 | ||
962 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
963 | { | |
964 | int ret; | |
965 | ||
966 | switch (attr->group) { | |
4f718eab DD |
967 | case KVM_S390_VM_MEM_CTRL: |
968 | switch (attr->attr) { | |
969 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
970 | case KVM_S390_VM_MEM_CLR_CMMA: | |
f9cbd9b0 DH |
971 | ret = sclp.has_cmma ? 0 : -ENXIO; |
972 | break; | |
8c0a7ce6 | 973 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
974 | ret = 0; |
975 | break; | |
976 | default: | |
977 | ret = -ENXIO; | |
978 | break; | |
979 | } | |
980 | break; | |
72f25020 JH |
981 | case KVM_S390_VM_TOD: |
982 | switch (attr->attr) { | |
983 | case KVM_S390_VM_TOD_LOW: | |
984 | case KVM_S390_VM_TOD_HIGH: | |
985 | ret = 0; | |
986 | break; | |
987 | default: | |
988 | ret = -ENXIO; | |
989 | break; | |
990 | } | |
991 | break; | |
658b6eda MM |
992 | case KVM_S390_VM_CPU_MODEL: |
993 | switch (attr->attr) { | |
994 | case KVM_S390_VM_CPU_PROCESSOR: | |
995 | case KVM_S390_VM_CPU_MACHINE: | |
15c9705f DH |
996 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
997 | case KVM_S390_VM_CPU_MACHINE_FEAT: | |
0a763c78 | 998 | case KVM_S390_VM_CPU_MACHINE_SUBFUNC: |
658b6eda MM |
999 | ret = 0; |
1000 | break; | |
0a763c78 DH |
1001 | /* configuring subfunctions is not supported yet */ |
1002 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: | |
658b6eda MM |
1003 | default: |
1004 | ret = -ENXIO; | |
1005 | break; | |
1006 | } | |
1007 | break; | |
a374e892 TK |
1008 | case KVM_S390_VM_CRYPTO: |
1009 | switch (attr->attr) { | |
1010 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
1011 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
1012 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
1013 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
1014 | ret = 0; | |
1015 | break; | |
1016 | default: | |
1017 | ret = -ENXIO; | |
1018 | break; | |
1019 | } | |
1020 | break; | |
f2061656 DD |
1021 | default: |
1022 | ret = -ENXIO; | |
1023 | break; | |
1024 | } | |
1025 | ||
1026 | return ret; | |
1027 | } | |
1028 | ||
30ee2a98 JH |
1029 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
1030 | { | |
1031 | uint8_t *keys; | |
1032 | uint64_t hva; | |
30ee2a98 JH |
1033 | int i, r = 0; |
1034 | ||
1035 | if (args->flags != 0) | |
1036 | return -EINVAL; | |
1037 | ||
1038 | /* Is this guest using storage keys? */ | |
1039 | if (!mm_use_skey(current->mm)) | |
1040 | return KVM_S390_GET_SKEYS_NONE; | |
1041 | ||
1042 | /* Enforce sane limit on memory allocation */ | |
1043 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
1044 | return -EINVAL; | |
1045 | ||
1046 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
1047 | GFP_KERNEL | __GFP_NOWARN); | |
1048 | if (!keys) | |
1049 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
1050 | if (!keys) | |
1051 | return -ENOMEM; | |
1052 | ||
d3ed1cee | 1053 | down_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1054 | for (i = 0; i < args->count; i++) { |
1055 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1056 | if (kvm_is_error_hva(hva)) { | |
1057 | r = -EFAULT; | |
d3ed1cee | 1058 | break; |
30ee2a98 JH |
1059 | } |
1060 | ||
154c8c19 DH |
1061 | r = get_guest_storage_key(current->mm, hva, &keys[i]); |
1062 | if (r) | |
d3ed1cee | 1063 | break; |
30ee2a98 | 1064 | } |
d3ed1cee MS |
1065 | up_read(¤t->mm->mmap_sem); |
1066 | ||
1067 | if (!r) { | |
1068 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
1069 | sizeof(uint8_t) * args->count); | |
1070 | if (r) | |
1071 | r = -EFAULT; | |
1072 | } | |
30ee2a98 | 1073 | |
30ee2a98 JH |
1074 | kvfree(keys); |
1075 | return r; | |
1076 | } | |
1077 | ||
1078 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
1079 | { | |
1080 | uint8_t *keys; | |
1081 | uint64_t hva; | |
1082 | int i, r = 0; | |
1083 | ||
1084 | if (args->flags != 0) | |
1085 | return -EINVAL; | |
1086 | ||
1087 | /* Enforce sane limit on memory allocation */ | |
1088 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
1089 | return -EINVAL; | |
1090 | ||
1091 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
1092 | GFP_KERNEL | __GFP_NOWARN); | |
1093 | if (!keys) | |
1094 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
1095 | if (!keys) | |
1096 | return -ENOMEM; | |
1097 | ||
1098 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
1099 | sizeof(uint8_t) * args->count); | |
1100 | if (r) { | |
1101 | r = -EFAULT; | |
1102 | goto out; | |
1103 | } | |
1104 | ||
1105 | /* Enable storage key handling for the guest */ | |
14d4a425 DD |
1106 | r = s390_enable_skey(); |
1107 | if (r) | |
1108 | goto out; | |
30ee2a98 | 1109 | |
d3ed1cee | 1110 | down_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1111 | for (i = 0; i < args->count; i++) { |
1112 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1113 | if (kvm_is_error_hva(hva)) { | |
1114 | r = -EFAULT; | |
d3ed1cee | 1115 | break; |
30ee2a98 JH |
1116 | } |
1117 | ||
1118 | /* Lowest order bit is reserved */ | |
1119 | if (keys[i] & 0x01) { | |
1120 | r = -EINVAL; | |
d3ed1cee | 1121 | break; |
30ee2a98 JH |
1122 | } |
1123 | ||
fe69eabf | 1124 | r = set_guest_storage_key(current->mm, hva, keys[i], 0); |
30ee2a98 | 1125 | if (r) |
d3ed1cee | 1126 | break; |
30ee2a98 | 1127 | } |
d3ed1cee | 1128 | up_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1129 | out: |
1130 | kvfree(keys); | |
1131 | return r; | |
1132 | } | |
1133 | ||
b0c632db HC |
1134 | long kvm_arch_vm_ioctl(struct file *filp, |
1135 | unsigned int ioctl, unsigned long arg) | |
1136 | { | |
1137 | struct kvm *kvm = filp->private_data; | |
1138 | void __user *argp = (void __user *)arg; | |
f2061656 | 1139 | struct kvm_device_attr attr; |
b0c632db HC |
1140 | int r; |
1141 | ||
1142 | switch (ioctl) { | |
ba5c1e9b CO |
1143 | case KVM_S390_INTERRUPT: { |
1144 | struct kvm_s390_interrupt s390int; | |
1145 | ||
1146 | r = -EFAULT; | |
1147 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
1148 | break; | |
1149 | r = kvm_s390_inject_vm(kvm, &s390int); | |
1150 | break; | |
1151 | } | |
d938dc55 CH |
1152 | case KVM_ENABLE_CAP: { |
1153 | struct kvm_enable_cap cap; | |
1154 | r = -EFAULT; | |
1155 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1156 | break; | |
1157 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
1158 | break; | |
1159 | } | |
84223598 CH |
1160 | case KVM_CREATE_IRQCHIP: { |
1161 | struct kvm_irq_routing_entry routing; | |
1162 | ||
1163 | r = -EINVAL; | |
1164 | if (kvm->arch.use_irqchip) { | |
1165 | /* Set up dummy routing. */ | |
1166 | memset(&routing, 0, sizeof(routing)); | |
152b2839 | 1167 | r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
84223598 CH |
1168 | } |
1169 | break; | |
1170 | } | |
f2061656 DD |
1171 | case KVM_SET_DEVICE_ATTR: { |
1172 | r = -EFAULT; | |
1173 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1174 | break; | |
1175 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
1176 | break; | |
1177 | } | |
1178 | case KVM_GET_DEVICE_ATTR: { | |
1179 | r = -EFAULT; | |
1180 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1181 | break; | |
1182 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
1183 | break; | |
1184 | } | |
1185 | case KVM_HAS_DEVICE_ATTR: { | |
1186 | r = -EFAULT; | |
1187 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1188 | break; | |
1189 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
1190 | break; | |
1191 | } | |
30ee2a98 JH |
1192 | case KVM_S390_GET_SKEYS: { |
1193 | struct kvm_s390_skeys args; | |
1194 | ||
1195 | r = -EFAULT; | |
1196 | if (copy_from_user(&args, argp, | |
1197 | sizeof(struct kvm_s390_skeys))) | |
1198 | break; | |
1199 | r = kvm_s390_get_skeys(kvm, &args); | |
1200 | break; | |
1201 | } | |
1202 | case KVM_S390_SET_SKEYS: { | |
1203 | struct kvm_s390_skeys args; | |
1204 | ||
1205 | r = -EFAULT; | |
1206 | if (copy_from_user(&args, argp, | |
1207 | sizeof(struct kvm_s390_skeys))) | |
1208 | break; | |
1209 | r = kvm_s390_set_skeys(kvm, &args); | |
1210 | break; | |
1211 | } | |
b0c632db | 1212 | default: |
367e1319 | 1213 | r = -ENOTTY; |
b0c632db HC |
1214 | } |
1215 | ||
1216 | return r; | |
1217 | } | |
1218 | ||
45c9b47c TK |
1219 | static int kvm_s390_query_ap_config(u8 *config) |
1220 | { | |
1221 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 1222 | u32 cc = 0; |
45c9b47c | 1223 | |
86044c8c | 1224 | memset(config, 0, 128); |
45c9b47c TK |
1225 | asm volatile( |
1226 | "lgr 0,%1\n" | |
1227 | "lgr 2,%2\n" | |
1228 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 1229 | "0: ipm %0\n" |
45c9b47c | 1230 | "srl %0,28\n" |
86044c8c CB |
1231 | "1:\n" |
1232 | EX_TABLE(0b, 1b) | |
1233 | : "+r" (cc) | |
45c9b47c TK |
1234 | : "r" (fcn_code), "r" (config) |
1235 | : "cc", "0", "2", "memory" | |
1236 | ); | |
1237 | ||
1238 | return cc; | |
1239 | } | |
1240 | ||
1241 | static int kvm_s390_apxa_installed(void) | |
1242 | { | |
1243 | u8 config[128]; | |
1244 | int cc; | |
1245 | ||
a6aacc3f | 1246 | if (test_facility(12)) { |
45c9b47c TK |
1247 | cc = kvm_s390_query_ap_config(config); |
1248 | ||
1249 | if (cc) | |
1250 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
1251 | else | |
1252 | return config[0] & 0x40; | |
1253 | } | |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
1259 | { | |
1260 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
1261 | ||
1262 | if (kvm_s390_apxa_installed()) | |
1263 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
1264 | else | |
1265 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
1266 | } | |
1267 | ||
9bb0ec09 | 1268 | static u64 kvm_s390_get_initial_cpuid(void) |
9d8d5786 | 1269 | { |
9bb0ec09 DH |
1270 | struct cpuid cpuid; |
1271 | ||
1272 | get_cpu_id(&cpuid); | |
1273 | cpuid.version = 0xff; | |
1274 | return *((u64 *) &cpuid); | |
9d8d5786 MM |
1275 | } |
1276 | ||
c54f0d6a | 1277 | static void kvm_s390_crypto_init(struct kvm *kvm) |
5102ee87 | 1278 | { |
9d8d5786 | 1279 | if (!test_kvm_facility(kvm, 76)) |
c54f0d6a | 1280 | return; |
5102ee87 | 1281 | |
c54f0d6a | 1282 | kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; |
45c9b47c | 1283 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1284 | |
ed6f76b4 TK |
1285 | /* Enable AES/DEA protected key functions by default */ |
1286 | kvm->arch.crypto.aes_kw = 1; | |
1287 | kvm->arch.crypto.dea_kw = 1; | |
1288 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1289 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1290 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1291 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
5102ee87 TK |
1292 | } |
1293 | ||
7d43bafc ED |
1294 | static void sca_dispose(struct kvm *kvm) |
1295 | { | |
1296 | if (kvm->arch.use_esca) | |
5e044315 | 1297 | free_pages_exact(kvm->arch.sca, sizeof(struct esca_block)); |
7d43bafc ED |
1298 | else |
1299 | free_page((unsigned long)(kvm->arch.sca)); | |
1300 | kvm->arch.sca = NULL; | |
1301 | } | |
1302 | ||
e08b9637 | 1303 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1304 | { |
76a6dd72 | 1305 | gfp_t alloc_flags = GFP_KERNEL; |
9d8d5786 | 1306 | int i, rc; |
b0c632db | 1307 | char debug_name[16]; |
f6c137ff | 1308 | static unsigned long sca_offset; |
b0c632db | 1309 | |
e08b9637 CO |
1310 | rc = -EINVAL; |
1311 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1312 | if (type & ~KVM_VM_S390_UCONTROL) | |
1313 | goto out_err; | |
1314 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1315 | goto out_err; | |
1316 | #else | |
1317 | if (type) | |
1318 | goto out_err; | |
1319 | #endif | |
1320 | ||
b0c632db HC |
1321 | rc = s390_enable_sie(); |
1322 | if (rc) | |
d89f5eff | 1323 | goto out_err; |
b0c632db | 1324 | |
b290411a CO |
1325 | rc = -ENOMEM; |
1326 | ||
7d0a5e62 JF |
1327 | ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500); |
1328 | ||
7d43bafc | 1329 | kvm->arch.use_esca = 0; /* start with basic SCA */ |
76a6dd72 DH |
1330 | if (!sclp.has_64bscao) |
1331 | alloc_flags |= GFP_DMA; | |
5e044315 | 1332 | rwlock_init(&kvm->arch.sca_lock); |
76a6dd72 | 1333 | kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags); |
b0c632db | 1334 | if (!kvm->arch.sca) |
d89f5eff | 1335 | goto out_err; |
f6c137ff | 1336 | spin_lock(&kvm_lock); |
c5c2c393 | 1337 | sca_offset += 16; |
bc784cce | 1338 | if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE) |
c5c2c393 | 1339 | sca_offset = 0; |
bc784cce ED |
1340 | kvm->arch.sca = (struct bsca_block *) |
1341 | ((char *) kvm->arch.sca + sca_offset); | |
f6c137ff | 1342 | spin_unlock(&kvm_lock); |
b0c632db HC |
1343 | |
1344 | sprintf(debug_name, "kvm-%u", current->pid); | |
1345 | ||
1cb9cf72 | 1346 | kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
b0c632db | 1347 | if (!kvm->arch.dbf) |
40f5b735 | 1348 | goto out_err; |
b0c632db | 1349 | |
c54f0d6a DH |
1350 | kvm->arch.sie_page2 = |
1351 | (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1352 | if (!kvm->arch.sie_page2) | |
40f5b735 | 1353 | goto out_err; |
9d8d5786 | 1354 | |
fb5bf93f | 1355 | /* Populate the facility mask initially. */ |
c54f0d6a | 1356 | memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 1357 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
1358 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1359 | if (i < kvm_s390_fac_list_mask_size()) | |
c54f0d6a | 1360 | kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1361 | else |
c54f0d6a | 1362 | kvm->arch.model.fac_mask[i] = 0UL; |
9d8d5786 MM |
1363 | } |
1364 | ||
981467c9 | 1365 | /* Populate the facility list initially. */ |
c54f0d6a DH |
1366 | kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list; |
1367 | memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask, | |
981467c9 MM |
1368 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
1369 | ||
95ca2cb5 JF |
1370 | set_kvm_facility(kvm->arch.model.fac_mask, 74); |
1371 | set_kvm_facility(kvm->arch.model.fac_list, 74); | |
1372 | ||
9bb0ec09 | 1373 | kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid(); |
37c5f6c8 | 1374 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1375 | |
c54f0d6a | 1376 | kvm_s390_crypto_init(kvm); |
5102ee87 | 1377 | |
ba5c1e9b | 1378 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1379 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1380 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1381 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1382 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1383 | |
b0c632db | 1384 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
78f26131 | 1385 | VM_EVENT(kvm, 3, "vm created with type %lu", type); |
b0c632db | 1386 | |
e08b9637 CO |
1387 | if (type & KVM_VM_S390_UCONTROL) { |
1388 | kvm->arch.gmap = NULL; | |
a3a92c31 | 1389 | kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT; |
e08b9637 | 1390 | } else { |
32e6b236 GH |
1391 | if (sclp.hamax == U64_MAX) |
1392 | kvm->arch.mem_limit = TASK_MAX_SIZE; | |
1393 | else | |
1394 | kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE, | |
1395 | sclp.hamax + 1); | |
a3a92c31 | 1396 | kvm->arch.gmap = gmap_alloc(current->mm, kvm->arch.mem_limit - 1); |
e08b9637 | 1397 | if (!kvm->arch.gmap) |
40f5b735 | 1398 | goto out_err; |
2c70fe44 | 1399 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1400 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1401 | } |
fa6b7fe9 CH |
1402 | |
1403 | kvm->arch.css_support = 0; | |
84223598 | 1404 | kvm->arch.use_irqchip = 0; |
72f25020 | 1405 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1406 | |
8ad35755 | 1407 | spin_lock_init(&kvm->arch.start_stop_lock); |
8335713a | 1408 | KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid); |
8ad35755 | 1409 | |
d89f5eff | 1410 | return 0; |
40f5b735 | 1411 | out_err: |
c54f0d6a | 1412 | free_page((unsigned long)kvm->arch.sie_page2); |
598841ca | 1413 | debug_unregister(kvm->arch.dbf); |
7d43bafc | 1414 | sca_dispose(kvm); |
78f26131 | 1415 | KVM_EVENT(3, "creation of vm failed: %d", rc); |
d89f5eff | 1416 | return rc; |
b0c632db HC |
1417 | } |
1418 | ||
d329c035 CB |
1419 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1420 | { | |
1421 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1422 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1423 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1424 | kvm_clear_async_pf_completion_queue(vcpu); |
bc784cce | 1425 | if (!kvm_is_ucontrol(vcpu->kvm)) |
a6e2f683 | 1426 | sca_del_vcpu(vcpu); |
27e0393f CO |
1427 | |
1428 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1429 | gmap_free(vcpu->arch.gmap); | |
1430 | ||
e6db1d61 | 1431 | if (vcpu->kvm->arch.use_cmma) |
b31605c1 | 1432 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
d329c035 | 1433 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1434 | |
6692cef3 | 1435 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1436 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1437 | } |
1438 | ||
1439 | static void kvm_free_vcpus(struct kvm *kvm) | |
1440 | { | |
1441 | unsigned int i; | |
988a2cae | 1442 | struct kvm_vcpu *vcpu; |
d329c035 | 1443 | |
988a2cae GN |
1444 | kvm_for_each_vcpu(i, vcpu, kvm) |
1445 | kvm_arch_vcpu_destroy(vcpu); | |
1446 | ||
1447 | mutex_lock(&kvm->lock); | |
1448 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1449 | kvm->vcpus[i] = NULL; | |
1450 | ||
1451 | atomic_set(&kvm->online_vcpus, 0); | |
1452 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1453 | } |
1454 | ||
b0c632db HC |
1455 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1456 | { | |
d329c035 | 1457 | kvm_free_vcpus(kvm); |
7d43bafc | 1458 | sca_dispose(kvm); |
d329c035 | 1459 | debug_unregister(kvm->arch.dbf); |
c54f0d6a | 1460 | free_page((unsigned long)kvm->arch.sie_page2); |
27e0393f CO |
1461 | if (!kvm_is_ucontrol(kvm)) |
1462 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 1463 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1464 | kvm_s390_clear_float_irqs(kvm); |
8335713a | 1465 | KVM_EVENT(3, "vm 0x%pK destroyed", kvm); |
b0c632db HC |
1466 | } |
1467 | ||
1468 | /* Section: vcpu related */ | |
dafd032a DD |
1469 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1470 | { | |
1471 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
1472 | if (!vcpu->arch.gmap) | |
1473 | return -ENOMEM; | |
1474 | vcpu->arch.gmap->private = vcpu->kvm; | |
1475 | ||
1476 | return 0; | |
1477 | } | |
1478 | ||
a6e2f683 ED |
1479 | static void sca_del_vcpu(struct kvm_vcpu *vcpu) |
1480 | { | |
5e044315 | 1481 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
1482 | if (vcpu->kvm->arch.use_esca) { |
1483 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
a6e2f683 | 1484 | |
7d43bafc | 1485 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
10ce32d5 | 1486 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc ED |
1487 | } else { |
1488 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
1489 | ||
1490 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); | |
10ce32d5 | 1491 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc | 1492 | } |
5e044315 | 1493 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a6e2f683 ED |
1494 | } |
1495 | ||
eaa78f34 | 1496 | static void sca_add_vcpu(struct kvm_vcpu *vcpu) |
a6e2f683 | 1497 | { |
eaa78f34 DH |
1498 | read_lock(&vcpu->kvm->arch.sca_lock); |
1499 | if (vcpu->kvm->arch.use_esca) { | |
1500 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
7d43bafc | 1501 | |
eaa78f34 | 1502 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1503 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1504 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU; | |
25508824 | 1505 | vcpu->arch.sie_block->ecb2 |= 0x04U; |
eaa78f34 | 1506 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
7d43bafc | 1507 | } else { |
eaa78f34 | 1508 | struct bsca_block *sca = vcpu->kvm->arch.sca; |
a6e2f683 | 1509 | |
eaa78f34 | 1510 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1511 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1512 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
eaa78f34 | 1513 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); |
7d43bafc | 1514 | } |
eaa78f34 | 1515 | read_unlock(&vcpu->kvm->arch.sca_lock); |
5e044315 ED |
1516 | } |
1517 | ||
1518 | /* Basic SCA to Extended SCA data copy routines */ | |
1519 | static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s) | |
1520 | { | |
1521 | d->sda = s->sda; | |
1522 | d->sigp_ctrl.c = s->sigp_ctrl.c; | |
1523 | d->sigp_ctrl.scn = s->sigp_ctrl.scn; | |
1524 | } | |
1525 | ||
1526 | static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s) | |
1527 | { | |
1528 | int i; | |
1529 | ||
1530 | d->ipte_control = s->ipte_control; | |
1531 | d->mcn[0] = s->mcn; | |
1532 | for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++) | |
1533 | sca_copy_entry(&d->cpu[i], &s->cpu[i]); | |
1534 | } | |
1535 | ||
1536 | static int sca_switch_to_extended(struct kvm *kvm) | |
1537 | { | |
1538 | struct bsca_block *old_sca = kvm->arch.sca; | |
1539 | struct esca_block *new_sca; | |
1540 | struct kvm_vcpu *vcpu; | |
1541 | unsigned int vcpu_idx; | |
1542 | u32 scaol, scaoh; | |
1543 | ||
1544 | new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO); | |
1545 | if (!new_sca) | |
1546 | return -ENOMEM; | |
1547 | ||
1548 | scaoh = (u32)((u64)(new_sca) >> 32); | |
1549 | scaol = (u32)(u64)(new_sca) & ~0x3fU; | |
1550 | ||
1551 | kvm_s390_vcpu_block_all(kvm); | |
1552 | write_lock(&kvm->arch.sca_lock); | |
1553 | ||
1554 | sca_copy_b_to_e(new_sca, old_sca); | |
1555 | ||
1556 | kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) { | |
1557 | vcpu->arch.sie_block->scaoh = scaoh; | |
1558 | vcpu->arch.sie_block->scaol = scaol; | |
1559 | vcpu->arch.sie_block->ecb2 |= 0x04U; | |
1560 | } | |
1561 | kvm->arch.sca = new_sca; | |
1562 | kvm->arch.use_esca = 1; | |
1563 | ||
1564 | write_unlock(&kvm->arch.sca_lock); | |
1565 | kvm_s390_vcpu_unblock_all(kvm); | |
1566 | ||
1567 | free_page((unsigned long)old_sca); | |
1568 | ||
8335713a CB |
1569 | VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)", |
1570 | old_sca, kvm->arch.sca); | |
5e044315 | 1571 | return 0; |
a6e2f683 ED |
1572 | } |
1573 | ||
1574 | static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id) | |
1575 | { | |
5e044315 ED |
1576 | int rc; |
1577 | ||
1578 | if (id < KVM_S390_BSCA_CPU_SLOTS) | |
1579 | return true; | |
76a6dd72 | 1580 | if (!sclp.has_esca || !sclp.has_64bscao) |
5e044315 ED |
1581 | return false; |
1582 | ||
1583 | mutex_lock(&kvm->lock); | |
1584 | rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm); | |
1585 | mutex_unlock(&kvm->lock); | |
1586 | ||
1587 | return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS; | |
a6e2f683 ED |
1588 | } |
1589 | ||
b0c632db HC |
1590 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1591 | { | |
3c038e6b DD |
1592 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1593 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1594 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1595 | KVM_SYNC_GPRS | | |
9eed0735 | 1596 | KVM_SYNC_ACRS | |
b028ee3e DH |
1597 | KVM_SYNC_CRS | |
1598 | KVM_SYNC_ARCH0 | | |
1599 | KVM_SYNC_PFAULT; | |
c6e5f166 FZ |
1600 | if (test_kvm_facility(vcpu->kvm, 64)) |
1601 | vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB; | |
f6aa6dc4 DH |
1602 | /* fprs can be synchronized via vrs, even if the guest has no vx. With |
1603 | * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. | |
1604 | */ | |
1605 | if (MACHINE_HAS_VX) | |
68c55750 | 1606 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; |
6fd8e67d DH |
1607 | else |
1608 | vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS; | |
dafd032a DD |
1609 | |
1610 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1611 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1612 | ||
b0c632db HC |
1613 | return 0; |
1614 | } | |
1615 | ||
db0758b2 DH |
1616 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
1617 | static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1618 | { | |
1619 | WARN_ON_ONCE(vcpu->arch.cputm_start != 0); | |
9c23a131 | 1620 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1621 | vcpu->arch.cputm_start = get_tod_clock_fast(); |
9c23a131 | 1622 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1623 | } |
1624 | ||
1625 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1626 | static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1627 | { | |
1628 | WARN_ON_ONCE(vcpu->arch.cputm_start == 0); | |
9c23a131 | 1629 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1630 | vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start; |
1631 | vcpu->arch.cputm_start = 0; | |
9c23a131 | 1632 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1633 | } |
1634 | ||
1635 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1636 | static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1637 | { | |
1638 | WARN_ON_ONCE(vcpu->arch.cputm_enabled); | |
1639 | vcpu->arch.cputm_enabled = true; | |
1640 | __start_cpu_timer_accounting(vcpu); | |
1641 | } | |
1642 | ||
1643 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1644 | static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1645 | { | |
1646 | WARN_ON_ONCE(!vcpu->arch.cputm_enabled); | |
1647 | __stop_cpu_timer_accounting(vcpu); | |
1648 | vcpu->arch.cputm_enabled = false; | |
1649 | } | |
1650 | ||
1651 | static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1652 | { | |
1653 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1654 | __enable_cpu_timer_accounting(vcpu); | |
1655 | preempt_enable(); | |
1656 | } | |
1657 | ||
1658 | static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1659 | { | |
1660 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1661 | __disable_cpu_timer_accounting(vcpu); | |
1662 | preempt_enable(); | |
1663 | } | |
1664 | ||
4287f247 DH |
1665 | /* set the cpu timer - may only be called from the VCPU thread itself */ |
1666 | void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm) | |
1667 | { | |
db0758b2 | 1668 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
9c23a131 | 1669 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1670 | if (vcpu->arch.cputm_enabled) |
1671 | vcpu->arch.cputm_start = get_tod_clock_fast(); | |
4287f247 | 1672 | vcpu->arch.sie_block->cputm = cputm; |
9c23a131 | 1673 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1674 | preempt_enable(); |
4287f247 DH |
1675 | } |
1676 | ||
db0758b2 | 1677 | /* update and get the cpu timer - can also be called from other VCPU threads */ |
4287f247 DH |
1678 | __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) |
1679 | { | |
9c23a131 | 1680 | unsigned int seq; |
db0758b2 | 1681 | __u64 value; |
db0758b2 DH |
1682 | |
1683 | if (unlikely(!vcpu->arch.cputm_enabled)) | |
1684 | return vcpu->arch.sie_block->cputm; | |
1685 | ||
9c23a131 DH |
1686 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
1687 | do { | |
1688 | seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount); | |
1689 | /* | |
1690 | * If the writer would ever execute a read in the critical | |
1691 | * section, e.g. in irq context, we have a deadlock. | |
1692 | */ | |
1693 | WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu); | |
1694 | value = vcpu->arch.sie_block->cputm; | |
1695 | /* if cputm_start is 0, accounting is being started/stopped */ | |
1696 | if (likely(vcpu->arch.cputm_start)) | |
1697 | value -= get_tod_clock_fast() - vcpu->arch.cputm_start; | |
1698 | } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1)); | |
1699 | preempt_enable(); | |
db0758b2 | 1700 | return value; |
4287f247 DH |
1701 | } |
1702 | ||
b0c632db HC |
1703 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1704 | { | |
9977e886 | 1705 | /* Save host register state */ |
d0164ee2 | 1706 | save_fpu_regs(); |
9abc2a08 DH |
1707 | vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; |
1708 | vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; | |
9977e886 | 1709 | |
6fd8e67d DH |
1710 | if (MACHINE_HAS_VX) |
1711 | current->thread.fpu.regs = vcpu->run->s.regs.vrs; | |
1712 | else | |
1713 | current->thread.fpu.regs = vcpu->run->s.regs.fprs; | |
9abc2a08 | 1714 | current->thread.fpu.fpc = vcpu->run->s.regs.fpc; |
9977e886 | 1715 | if (test_fp_ctl(current->thread.fpu.fpc)) |
96b2d7a8 | 1716 | /* User space provided an invalid FPC, let's clear it */ |
9977e886 HB |
1717 | current->thread.fpu.fpc = 0; |
1718 | ||
1719 | save_access_regs(vcpu->arch.host_acrs); | |
59674c1a | 1720 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 1721 | gmap_enable(vcpu->arch.gmap); |
805de8f4 | 1722 | atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
5ebda316 | 1723 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1724 | __start_cpu_timer_accounting(vcpu); |
01a745ac | 1725 | vcpu->cpu = cpu; |
b0c632db HC |
1726 | } |
1727 | ||
1728 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1729 | { | |
01a745ac | 1730 | vcpu->cpu = -1; |
5ebda316 | 1731 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1732 | __stop_cpu_timer_accounting(vcpu); |
805de8f4 | 1733 | atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 1734 | gmap_disable(vcpu->arch.gmap); |
9977e886 | 1735 | |
9abc2a08 | 1736 | /* Save guest register state */ |
d0164ee2 | 1737 | save_fpu_regs(); |
9abc2a08 | 1738 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
9977e886 | 1739 | |
9abc2a08 DH |
1740 | /* Restore host register state */ |
1741 | current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; | |
1742 | current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; | |
9977e886 HB |
1743 | |
1744 | save_access_regs(vcpu->run->s.regs.acrs); | |
b0c632db HC |
1745 | restore_access_regs(vcpu->arch.host_acrs); |
1746 | } | |
1747 | ||
1748 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1749 | { | |
1750 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1751 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1752 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1753 | kvm_s390_set_prefix(vcpu, 0); |
4287f247 | 1754 | kvm_s390_set_cpu_timer(vcpu, 0); |
b0c632db HC |
1755 | vcpu->arch.sie_block->ckc = 0UL; |
1756 | vcpu->arch.sie_block->todpr = 0; | |
1757 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1758 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1759 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
9abc2a08 DH |
1760 | /* make sure the new fpc will be lazily loaded */ |
1761 | save_fpu_regs(); | |
1762 | current->thread.fpu.fpc = 0; | |
b0c632db | 1763 | vcpu->arch.sie_block->gbea = 1; |
672550fb | 1764 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1765 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1766 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1767 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1768 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1769 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1770 | } |
1771 | ||
31928aa5 | 1772 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1773 | { |
72f25020 | 1774 | mutex_lock(&vcpu->kvm->lock); |
fdf03650 | 1775 | preempt_disable(); |
72f25020 | 1776 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
fdf03650 | 1777 | preempt_enable(); |
72f25020 | 1778 | mutex_unlock(&vcpu->kvm->lock); |
25508824 | 1779 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
dafd032a | 1780 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
eaa78f34 | 1781 | sca_add_vcpu(vcpu); |
25508824 DH |
1782 | } |
1783 | ||
42897d86 MT |
1784 | } |
1785 | ||
5102ee87 TK |
1786 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1787 | { | |
9d8d5786 | 1788 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1789 | return; |
1790 | ||
a374e892 TK |
1791 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1792 | ||
1793 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1794 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1795 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1796 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1797 | ||
5102ee87 TK |
1798 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1799 | } | |
1800 | ||
b31605c1 DD |
1801 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1802 | { | |
1803 | free_page(vcpu->arch.sie_block->cbrlo); | |
1804 | vcpu->arch.sie_block->cbrlo = 0; | |
1805 | } | |
1806 | ||
1807 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1808 | { | |
1809 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1810 | if (!vcpu->arch.sie_block->cbrlo) | |
1811 | return -ENOMEM; | |
1812 | ||
1813 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1814 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1815 | return 0; | |
1816 | } | |
1817 | ||
91520f1a MM |
1818 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1819 | { | |
1820 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1821 | ||
91520f1a | 1822 | vcpu->arch.sie_block->ibc = model->ibc; |
80bc79dc | 1823 | if (test_kvm_facility(vcpu->kvm, 7)) |
c54f0d6a | 1824 | vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list; |
91520f1a MM |
1825 | } |
1826 | ||
b0c632db HC |
1827 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1828 | { | |
b31605c1 | 1829 | int rc = 0; |
b31288fa | 1830 | |
9e6dabef CH |
1831 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1832 | CPUSTAT_SM | | |
a4a4f191 GH |
1833 | CPUSTAT_STOPPED); |
1834 | ||
53df84f8 | 1835 | if (test_kvm_facility(vcpu->kvm, 78)) |
805de8f4 | 1836 | atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); |
53df84f8 | 1837 | else if (test_kvm_facility(vcpu->kvm, 8)) |
805de8f4 | 1838 | atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
a4a4f191 | 1839 | |
91520f1a MM |
1840 | kvm_s390_vcpu_setup_model(vcpu); |
1841 | ||
bdab09f3 DH |
1842 | /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */ |
1843 | if (MACHINE_HAS_ESOP) | |
1844 | vcpu->arch.sie_block->ecb |= 0x02; | |
bd50e8ec DH |
1845 | if (test_kvm_facility(vcpu->kvm, 9)) |
1846 | vcpu->arch.sie_block->ecb |= 0x04; | |
f597d24e | 1847 | if (test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1848 | vcpu->arch.sie_block->ecb |= 0x10; |
1849 | ||
873b425e | 1850 | if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi) |
d6af0b49 | 1851 | vcpu->arch.sie_block->ecb2 |= 0x08; |
48ee7d3a DH |
1852 | vcpu->arch.sie_block->eca = 0x1002000U; |
1853 | if (sclp.has_cei) | |
1854 | vcpu->arch.sie_block->eca |= 0x80000000U; | |
11ad65b7 DH |
1855 | if (sclp.has_ib) |
1856 | vcpu->arch.sie_block->eca |= 0x40000000U; | |
37c5f6c8 | 1857 | if (sclp.has_siif) |
217a4406 | 1858 | vcpu->arch.sie_block->eca |= 1; |
37c5f6c8 | 1859 | if (sclp.has_sigpif) |
ea5f4969 | 1860 | vcpu->arch.sie_block->eca |= 0x10000000U; |
c6e5f166 FZ |
1861 | if (test_kvm_facility(vcpu->kvm, 64)) |
1862 | vcpu->arch.sie_block->ecb3 |= 0x01; | |
18280d8b | 1863 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1864 | vcpu->arch.sie_block->eca |= 0x00020000; |
1865 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1866 | } | |
c6e5f166 | 1867 | vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb; |
492d8642 | 1868 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
95ca2cb5 JF |
1869 | if (test_kvm_facility(vcpu->kvm, 74)) |
1870 | vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; | |
5a5e6536 | 1871 | |
e6db1d61 | 1872 | if (vcpu->kvm->arch.use_cmma) { |
b31605c1 DD |
1873 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
1874 | if (rc) | |
1875 | return rc; | |
b31288fa | 1876 | } |
0ac96caf | 1877 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1878 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1879 | |
5102ee87 TK |
1880 | kvm_s390_vcpu_crypto_setup(vcpu); |
1881 | ||
b31605c1 | 1882 | return rc; |
b0c632db HC |
1883 | } |
1884 | ||
1885 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1886 | unsigned int id) | |
1887 | { | |
4d47555a | 1888 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1889 | struct sie_page *sie_page; |
4d47555a CO |
1890 | int rc = -EINVAL; |
1891 | ||
4215825e | 1892 | if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id)) |
4d47555a CO |
1893 | goto out; |
1894 | ||
1895 | rc = -ENOMEM; | |
b0c632db | 1896 | |
b110feaf | 1897 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1898 | if (!vcpu) |
4d47555a | 1899 | goto out; |
b0c632db | 1900 | |
7feb6bb8 MM |
1901 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1902 | if (!sie_page) | |
b0c632db HC |
1903 | goto out_free_cpu; |
1904 | ||
7feb6bb8 MM |
1905 | vcpu->arch.sie_block = &sie_page->sie_block; |
1906 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
1907 | ||
efed1104 DH |
1908 | /* the real guest size will always be smaller than msl */ |
1909 | vcpu->arch.sie_block->mso = 0; | |
1910 | vcpu->arch.sie_block->msl = sclp.hamax; | |
1911 | ||
b0c632db | 1912 | vcpu->arch.sie_block->icpua = id; |
ba5c1e9b | 1913 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1914 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 1915 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 1916 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
9c23a131 | 1917 | seqcount_init(&vcpu->arch.cputm_seqcount); |
ba5c1e9b | 1918 | |
b0c632db HC |
1919 | rc = kvm_vcpu_init(vcpu, kvm, id); |
1920 | if (rc) | |
9abc2a08 | 1921 | goto out_free_sie_block; |
8335713a | 1922 | VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu, |
b0c632db | 1923 | vcpu->arch.sie_block); |
ade38c31 | 1924 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 1925 | |
b0c632db | 1926 | return vcpu; |
7b06bf2f WY |
1927 | out_free_sie_block: |
1928 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 1929 | out_free_cpu: |
b110feaf | 1930 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 1931 | out: |
b0c632db HC |
1932 | return ERR_PTR(rc); |
1933 | } | |
1934 | ||
b0c632db HC |
1935 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
1936 | { | |
9a022067 | 1937 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
1938 | } |
1939 | ||
27406cd5 | 1940 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e | 1941 | { |
805de8f4 | 1942 | atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1943 | exit_sie(vcpu); |
49b99e1e CB |
1944 | } |
1945 | ||
27406cd5 | 1946 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e | 1947 | { |
805de8f4 | 1948 | atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
49b99e1e CB |
1949 | } |
1950 | ||
8e236546 CB |
1951 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
1952 | { | |
805de8f4 | 1953 | atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1954 | exit_sie(vcpu); |
8e236546 CB |
1955 | } |
1956 | ||
1957 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
1958 | { | |
9bf9fde2 | 1959 | atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
8e236546 CB |
1960 | } |
1961 | ||
49b99e1e CB |
1962 | /* |
1963 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
1964 | * If the CPU is not running (e.g. waiting as idle) the function will | |
1965 | * return immediately. */ | |
1966 | void exit_sie(struct kvm_vcpu *vcpu) | |
1967 | { | |
805de8f4 | 1968 | atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
49b99e1e CB |
1969 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
1970 | cpu_relax(); | |
1971 | } | |
1972 | ||
8e236546 CB |
1973 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
1974 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 1975 | { |
8e236546 CB |
1976 | kvm_make_request(req, vcpu); |
1977 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
1978 | } |
1979 | ||
414d3b07 MS |
1980 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
1981 | unsigned long end) | |
2c70fe44 | 1982 | { |
2c70fe44 CB |
1983 | struct kvm *kvm = gmap->private; |
1984 | struct kvm_vcpu *vcpu; | |
414d3b07 MS |
1985 | unsigned long prefix; |
1986 | int i; | |
2c70fe44 | 1987 | |
414d3b07 MS |
1988 | if (start >= 1UL << 31) |
1989 | /* We are only interested in prefix pages */ | |
1990 | return; | |
2c70fe44 CB |
1991 | kvm_for_each_vcpu(i, vcpu, kvm) { |
1992 | /* match against both prefix pages */ | |
414d3b07 MS |
1993 | prefix = kvm_s390_get_prefix(vcpu); |
1994 | if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) { | |
1995 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx", | |
1996 | start, end); | |
8e236546 | 1997 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
1998 | } |
1999 | } | |
2000 | } | |
2001 | ||
b6d33834 CD |
2002 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
2003 | { | |
2004 | /* kvm common code refers to this, but never calls it */ | |
2005 | BUG(); | |
2006 | return 0; | |
2007 | } | |
2008 | ||
14eebd91 CO |
2009 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
2010 | struct kvm_one_reg *reg) | |
2011 | { | |
2012 | int r = -EINVAL; | |
2013 | ||
2014 | switch (reg->id) { | |
29b7c71b CO |
2015 | case KVM_REG_S390_TODPR: |
2016 | r = put_user(vcpu->arch.sie_block->todpr, | |
2017 | (u32 __user *)reg->addr); | |
2018 | break; | |
2019 | case KVM_REG_S390_EPOCHDIFF: | |
2020 | r = put_user(vcpu->arch.sie_block->epoch, | |
2021 | (u64 __user *)reg->addr); | |
2022 | break; | |
46a6dd1c | 2023 | case KVM_REG_S390_CPU_TIMER: |
4287f247 | 2024 | r = put_user(kvm_s390_get_cpu_timer(vcpu), |
46a6dd1c J |
2025 | (u64 __user *)reg->addr); |
2026 | break; | |
2027 | case KVM_REG_S390_CLOCK_COMP: | |
2028 | r = put_user(vcpu->arch.sie_block->ckc, | |
2029 | (u64 __user *)reg->addr); | |
2030 | break; | |
536336c2 DD |
2031 | case KVM_REG_S390_PFTOKEN: |
2032 | r = put_user(vcpu->arch.pfault_token, | |
2033 | (u64 __user *)reg->addr); | |
2034 | break; | |
2035 | case KVM_REG_S390_PFCOMPARE: | |
2036 | r = put_user(vcpu->arch.pfault_compare, | |
2037 | (u64 __user *)reg->addr); | |
2038 | break; | |
2039 | case KVM_REG_S390_PFSELECT: | |
2040 | r = put_user(vcpu->arch.pfault_select, | |
2041 | (u64 __user *)reg->addr); | |
2042 | break; | |
672550fb CB |
2043 | case KVM_REG_S390_PP: |
2044 | r = put_user(vcpu->arch.sie_block->pp, | |
2045 | (u64 __user *)reg->addr); | |
2046 | break; | |
afa45ff5 CB |
2047 | case KVM_REG_S390_GBEA: |
2048 | r = put_user(vcpu->arch.sie_block->gbea, | |
2049 | (u64 __user *)reg->addr); | |
2050 | break; | |
14eebd91 CO |
2051 | default: |
2052 | break; | |
2053 | } | |
2054 | ||
2055 | return r; | |
2056 | } | |
2057 | ||
2058 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
2059 | struct kvm_one_reg *reg) | |
2060 | { | |
2061 | int r = -EINVAL; | |
4287f247 | 2062 | __u64 val; |
14eebd91 CO |
2063 | |
2064 | switch (reg->id) { | |
29b7c71b CO |
2065 | case KVM_REG_S390_TODPR: |
2066 | r = get_user(vcpu->arch.sie_block->todpr, | |
2067 | (u32 __user *)reg->addr); | |
2068 | break; | |
2069 | case KVM_REG_S390_EPOCHDIFF: | |
2070 | r = get_user(vcpu->arch.sie_block->epoch, | |
2071 | (u64 __user *)reg->addr); | |
2072 | break; | |
46a6dd1c | 2073 | case KVM_REG_S390_CPU_TIMER: |
4287f247 DH |
2074 | r = get_user(val, (u64 __user *)reg->addr); |
2075 | if (!r) | |
2076 | kvm_s390_set_cpu_timer(vcpu, val); | |
46a6dd1c J |
2077 | break; |
2078 | case KVM_REG_S390_CLOCK_COMP: | |
2079 | r = get_user(vcpu->arch.sie_block->ckc, | |
2080 | (u64 __user *)reg->addr); | |
2081 | break; | |
536336c2 DD |
2082 | case KVM_REG_S390_PFTOKEN: |
2083 | r = get_user(vcpu->arch.pfault_token, | |
2084 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
2085 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2086 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
2087 | break; |
2088 | case KVM_REG_S390_PFCOMPARE: | |
2089 | r = get_user(vcpu->arch.pfault_compare, | |
2090 | (u64 __user *)reg->addr); | |
2091 | break; | |
2092 | case KVM_REG_S390_PFSELECT: | |
2093 | r = get_user(vcpu->arch.pfault_select, | |
2094 | (u64 __user *)reg->addr); | |
2095 | break; | |
672550fb CB |
2096 | case KVM_REG_S390_PP: |
2097 | r = get_user(vcpu->arch.sie_block->pp, | |
2098 | (u64 __user *)reg->addr); | |
2099 | break; | |
afa45ff5 CB |
2100 | case KVM_REG_S390_GBEA: |
2101 | r = get_user(vcpu->arch.sie_block->gbea, | |
2102 | (u64 __user *)reg->addr); | |
2103 | break; | |
14eebd91 CO |
2104 | default: |
2105 | break; | |
2106 | } | |
2107 | ||
2108 | return r; | |
2109 | } | |
b6d33834 | 2110 | |
b0c632db HC |
2111 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
2112 | { | |
b0c632db | 2113 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
2114 | return 0; |
2115 | } | |
2116 | ||
2117 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2118 | { | |
5a32c1af | 2119 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
2120 | return 0; |
2121 | } | |
2122 | ||
2123 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2124 | { | |
5a32c1af | 2125 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
2126 | return 0; |
2127 | } | |
2128 | ||
2129 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
2130 | struct kvm_sregs *sregs) | |
2131 | { | |
59674c1a | 2132 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 2133 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 2134 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
2135 | return 0; |
2136 | } | |
2137 | ||
2138 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
2139 | struct kvm_sregs *sregs) | |
2140 | { | |
59674c1a | 2141 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 2142 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
2143 | return 0; |
2144 | } | |
2145 | ||
2146 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2147 | { | |
9abc2a08 DH |
2148 | /* make sure the new values will be lazily loaded */ |
2149 | save_fpu_regs(); | |
4725c860 MS |
2150 | if (test_fp_ctl(fpu->fpc)) |
2151 | return -EINVAL; | |
9abc2a08 DH |
2152 | current->thread.fpu.fpc = fpu->fpc; |
2153 | if (MACHINE_HAS_VX) | |
2154 | convert_fp_to_vx(current->thread.fpu.vxrs, (freg_t *)fpu->fprs); | |
2155 | else | |
2156 | memcpy(current->thread.fpu.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
b0c632db HC |
2157 | return 0; |
2158 | } | |
2159 | ||
2160 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2161 | { | |
9abc2a08 DH |
2162 | /* make sure we have the latest values */ |
2163 | save_fpu_regs(); | |
2164 | if (MACHINE_HAS_VX) | |
2165 | convert_vx_to_fp((freg_t *)fpu->fprs, current->thread.fpu.vxrs); | |
2166 | else | |
2167 | memcpy(fpu->fprs, current->thread.fpu.fprs, sizeof(fpu->fprs)); | |
2168 | fpu->fpc = current->thread.fpu.fpc; | |
b0c632db HC |
2169 | return 0; |
2170 | } | |
2171 | ||
2172 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
2173 | { | |
2174 | int rc = 0; | |
2175 | ||
7a42fdc2 | 2176 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 2177 | rc = -EBUSY; |
d7b0b5eb CO |
2178 | else { |
2179 | vcpu->run->psw_mask = psw.mask; | |
2180 | vcpu->run->psw_addr = psw.addr; | |
2181 | } | |
b0c632db HC |
2182 | return rc; |
2183 | } | |
2184 | ||
2185 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
2186 | struct kvm_translation *tr) | |
2187 | { | |
2188 | return -EINVAL; /* not implemented yet */ | |
2189 | } | |
2190 | ||
27291e21 DH |
2191 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
2192 | KVM_GUESTDBG_USE_HW_BP | \ | |
2193 | KVM_GUESTDBG_ENABLE) | |
2194 | ||
d0bfb940 JK |
2195 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
2196 | struct kvm_guest_debug *dbg) | |
b0c632db | 2197 | { |
27291e21 DH |
2198 | int rc = 0; |
2199 | ||
2200 | vcpu->guest_debug = 0; | |
2201 | kvm_s390_clear_bp_data(vcpu); | |
2202 | ||
2de3bfc2 | 2203 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 | 2204 | return -EINVAL; |
89b5b4de DH |
2205 | if (!sclp.has_gpere) |
2206 | return -EINVAL; | |
27291e21 DH |
2207 | |
2208 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
2209 | vcpu->guest_debug = dbg->control; | |
2210 | /* enforce guest PER */ | |
805de8f4 | 2211 | atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2212 | |
2213 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
2214 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
2215 | } else { | |
805de8f4 | 2216 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2217 | vcpu->arch.guestdbg.last_bp = 0; |
2218 | } | |
2219 | ||
2220 | if (rc) { | |
2221 | vcpu->guest_debug = 0; | |
2222 | kvm_s390_clear_bp_data(vcpu); | |
805de8f4 | 2223 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2224 | } |
2225 | ||
2226 | return rc; | |
b0c632db HC |
2227 | } |
2228 | ||
62d9f0db MT |
2229 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
2230 | struct kvm_mp_state *mp_state) | |
2231 | { | |
6352e4d2 DH |
2232 | /* CHECK_STOP and LOAD are not supported yet */ |
2233 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
2234 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
2235 | } |
2236 | ||
2237 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
2238 | struct kvm_mp_state *mp_state) | |
2239 | { | |
6352e4d2 DH |
2240 | int rc = 0; |
2241 | ||
2242 | /* user space knows about this interface - let it control the state */ | |
2243 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
2244 | ||
2245 | switch (mp_state->mp_state) { | |
2246 | case KVM_MP_STATE_STOPPED: | |
2247 | kvm_s390_vcpu_stop(vcpu); | |
2248 | break; | |
2249 | case KVM_MP_STATE_OPERATING: | |
2250 | kvm_s390_vcpu_start(vcpu); | |
2251 | break; | |
2252 | case KVM_MP_STATE_LOAD: | |
2253 | case KVM_MP_STATE_CHECK_STOP: | |
2254 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
2255 | default: | |
2256 | rc = -ENXIO; | |
2257 | } | |
2258 | ||
2259 | return rc; | |
62d9f0db MT |
2260 | } |
2261 | ||
8ad35755 DH |
2262 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
2263 | { | |
2264 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
2265 | } | |
2266 | ||
2c70fe44 CB |
2267 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
2268 | { | |
8ad35755 | 2269 | retry: |
8e236546 | 2270 | kvm_s390_vcpu_request_handled(vcpu); |
586b7ccd CB |
2271 | if (!vcpu->requests) |
2272 | return 0; | |
2c70fe44 CB |
2273 | /* |
2274 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
2275 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
2276 | * This ensures that the ipte instruction for this request has | |
2277 | * already finished. We might race against a second unmapper that | |
2278 | * wants to set the blocking bit. Lets just retry the request loop. | |
2279 | */ | |
8ad35755 | 2280 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
2281 | int rc; |
2282 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 2283 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
2284 | PAGE_SIZE * 2); |
2285 | if (rc) | |
2286 | return rc; | |
8ad35755 | 2287 | goto retry; |
2c70fe44 | 2288 | } |
8ad35755 | 2289 | |
d3d692c8 DH |
2290 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
2291 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
2292 | goto retry; | |
2293 | } | |
2294 | ||
8ad35755 DH |
2295 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
2296 | if (!ibs_enabled(vcpu)) { | |
2297 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
805de8f4 | 2298 | atomic_or(CPUSTAT_IBS, |
8ad35755 DH |
2299 | &vcpu->arch.sie_block->cpuflags); |
2300 | } | |
2301 | goto retry; | |
2c70fe44 | 2302 | } |
8ad35755 DH |
2303 | |
2304 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
2305 | if (ibs_enabled(vcpu)) { | |
2306 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
805de8f4 | 2307 | atomic_andnot(CPUSTAT_IBS, |
8ad35755 DH |
2308 | &vcpu->arch.sie_block->cpuflags); |
2309 | } | |
2310 | goto retry; | |
2311 | } | |
2312 | ||
0759d068 DH |
2313 | /* nothing to do, just clear the request */ |
2314 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
2315 | ||
2c70fe44 CB |
2316 | return 0; |
2317 | } | |
2318 | ||
25ed1675 DH |
2319 | void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod) |
2320 | { | |
2321 | struct kvm_vcpu *vcpu; | |
2322 | int i; | |
2323 | ||
2324 | mutex_lock(&kvm->lock); | |
2325 | preempt_disable(); | |
2326 | kvm->arch.epoch = tod - get_tod_clock(); | |
2327 | kvm_s390_vcpu_block_all(kvm); | |
2328 | kvm_for_each_vcpu(i, vcpu, kvm) | |
2329 | vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
2330 | kvm_s390_vcpu_unblock_all(kvm); | |
2331 | preempt_enable(); | |
2332 | mutex_unlock(&kvm->lock); | |
2333 | } | |
2334 | ||
fa576c58 TH |
2335 | /** |
2336 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
2337 | * @vcpu: The corresponding virtual cpu | |
2338 | * @gpa: Guest physical address | |
2339 | * @writable: Whether the page should be writable or not | |
2340 | * | |
2341 | * Make sure that a guest page has been faulted-in on the host. | |
2342 | * | |
2343 | * Return: Zero on success, negative error code otherwise. | |
2344 | */ | |
2345 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 2346 | { |
527e30b4 MS |
2347 | return gmap_fault(vcpu->arch.gmap, gpa, |
2348 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
2349 | } |
2350 | ||
3c038e6b DD |
2351 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
2352 | unsigned long token) | |
2353 | { | |
2354 | struct kvm_s390_interrupt inti; | |
383d0b05 | 2355 | struct kvm_s390_irq irq; |
3c038e6b DD |
2356 | |
2357 | if (start_token) { | |
383d0b05 JF |
2358 | irq.u.ext.ext_params2 = token; |
2359 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
2360 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
2361 | } else { |
2362 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 2363 | inti.parm64 = token; |
3c038e6b DD |
2364 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
2365 | } | |
2366 | } | |
2367 | ||
2368 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
2369 | struct kvm_async_pf *work) | |
2370 | { | |
2371 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
2372 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
2373 | } | |
2374 | ||
2375 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
2376 | struct kvm_async_pf *work) | |
2377 | { | |
2378 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
2379 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
2380 | } | |
2381 | ||
2382 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
2383 | struct kvm_async_pf *work) | |
2384 | { | |
2385 | /* s390 will always inject the page directly */ | |
2386 | } | |
2387 | ||
2388 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
2389 | { | |
2390 | /* | |
2391 | * s390 will always inject the page directly, | |
2392 | * but we still want check_async_completion to cleanup | |
2393 | */ | |
2394 | return true; | |
2395 | } | |
2396 | ||
2397 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
2398 | { | |
2399 | hva_t hva; | |
2400 | struct kvm_arch_async_pf arch; | |
2401 | int rc; | |
2402 | ||
2403 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
2404 | return 0; | |
2405 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
2406 | vcpu->arch.pfault_compare) | |
2407 | return 0; | |
2408 | if (psw_extint_disabled(vcpu)) | |
2409 | return 0; | |
9a022067 | 2410 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
2411 | return 0; |
2412 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
2413 | return 0; | |
2414 | if (!vcpu->arch.gmap->pfault_enabled) | |
2415 | return 0; | |
2416 | ||
81480cc1 HC |
2417 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
2418 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
2419 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
2420 | return 0; |
2421 | ||
2422 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
2423 | return rc; | |
2424 | } | |
2425 | ||
3fb4c40f | 2426 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 2427 | { |
3fb4c40f | 2428 | int rc, cpuflags; |
e168bf8d | 2429 | |
3c038e6b DD |
2430 | /* |
2431 | * On s390 notifications for arriving pages will be delivered directly | |
2432 | * to the guest but the house keeping for completed pfaults is | |
2433 | * handled outside the worker. | |
2434 | */ | |
2435 | kvm_check_async_pf_completion(vcpu); | |
2436 | ||
7ec7c8c7 CB |
2437 | vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14]; |
2438 | vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15]; | |
b0c632db HC |
2439 | |
2440 | if (need_resched()) | |
2441 | schedule(); | |
2442 | ||
d3a73acb | 2443 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
2444 | s390_handle_mcck(); |
2445 | ||
79395031 JF |
2446 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
2447 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
2448 | if (rc) | |
2449 | return rc; | |
2450 | } | |
0ff31867 | 2451 | |
2c70fe44 CB |
2452 | rc = kvm_s390_handle_requests(vcpu); |
2453 | if (rc) | |
2454 | return rc; | |
2455 | ||
27291e21 DH |
2456 | if (guestdbg_enabled(vcpu)) { |
2457 | kvm_s390_backup_guest_per_regs(vcpu); | |
2458 | kvm_s390_patch_guest_per_regs(vcpu); | |
2459 | } | |
2460 | ||
b0c632db | 2461 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
2462 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
2463 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
2464 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 2465 | |
3fb4c40f TH |
2466 | return 0; |
2467 | } | |
2468 | ||
492d8642 TH |
2469 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
2470 | { | |
56317920 DH |
2471 | struct kvm_s390_pgm_info pgm_info = { |
2472 | .code = PGM_ADDRESSING, | |
2473 | }; | |
2474 | u8 opcode, ilen; | |
492d8642 TH |
2475 | int rc; |
2476 | ||
2477 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
2478 | trace_kvm_s390_sie_fault(vcpu); | |
2479 | ||
2480 | /* | |
2481 | * We want to inject an addressing exception, which is defined as a | |
2482 | * suppressing or terminating exception. However, since we came here | |
2483 | * by a DAT access exception, the PSW still points to the faulting | |
2484 | * instruction since DAT exceptions are nullifying. So we've got | |
2485 | * to look up the current opcode to get the length of the instruction | |
2486 | * to be able to forward the PSW. | |
2487 | */ | |
65977322 | 2488 | rc = read_guest_instr(vcpu, &opcode, 1); |
56317920 | 2489 | ilen = insn_length(opcode); |
9b0d721a DH |
2490 | if (rc < 0) { |
2491 | return rc; | |
2492 | } else if (rc) { | |
2493 | /* Instruction-Fetching Exceptions - we can't detect the ilen. | |
2494 | * Forward by arbitrary ilc, injection will take care of | |
2495 | * nullification if necessary. | |
2496 | */ | |
2497 | pgm_info = vcpu->arch.pgm; | |
2498 | ilen = 4; | |
2499 | } | |
56317920 DH |
2500 | pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID; |
2501 | kvm_s390_forward_psw(vcpu, ilen); | |
2502 | return kvm_s390_inject_prog_irq(vcpu, &pgm_info); | |
492d8642 TH |
2503 | } |
2504 | ||
3fb4c40f TH |
2505 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
2506 | { | |
2b29a9fd DD |
2507 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
2508 | vcpu->arch.sie_block->icptcode); | |
2509 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
2510 | ||
27291e21 DH |
2511 | if (guestdbg_enabled(vcpu)) |
2512 | kvm_s390_restore_guest_per_regs(vcpu); | |
2513 | ||
7ec7c8c7 CB |
2514 | vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14; |
2515 | vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15; | |
71f116bf DH |
2516 | |
2517 | if (vcpu->arch.sie_block->icptcode > 0) { | |
2518 | int rc = kvm_handle_sie_intercept(vcpu); | |
2519 | ||
2520 | if (rc != -EOPNOTSUPP) | |
2521 | return rc; | |
2522 | vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2523 | vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
2524 | vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
2525 | vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2526 | return -EREMOTE; | |
2527 | } else if (exit_reason != -EFAULT) { | |
2528 | vcpu->stat.exit_null++; | |
2529 | return 0; | |
210b1607 TH |
2530 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
2531 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
2532 | vcpu->run->s390_ucontrol.trans_exc_code = | |
2533 | current->thread.gmap_addr; | |
2534 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
71f116bf | 2535 | return -EREMOTE; |
24eb3a82 | 2536 | } else if (current->thread.gmap_pfault) { |
3c038e6b | 2537 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 2538 | current->thread.gmap_pfault = 0; |
71f116bf DH |
2539 | if (kvm_arch_setup_async_pf(vcpu)) |
2540 | return 0; | |
2541 | return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1); | |
a76ccff6 | 2542 | } |
71f116bf | 2543 | return vcpu_post_run_fault_in_sie(vcpu); |
3fb4c40f TH |
2544 | } |
2545 | ||
2546 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
2547 | { | |
2548 | int rc, exit_reason; | |
2549 | ||
800c1065 TH |
2550 | /* |
2551 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
2552 | * ning the guest), so that memslots (and other stuff) are protected | |
2553 | */ | |
2554 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2555 | ||
a76ccff6 TH |
2556 | do { |
2557 | rc = vcpu_pre_run(vcpu); | |
2558 | if (rc) | |
2559 | break; | |
3fb4c40f | 2560 | |
800c1065 | 2561 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
2562 | /* |
2563 | * As PF_VCPU will be used in fault handler, between | |
2564 | * guest_enter and guest_exit should be no uaccess. | |
2565 | */ | |
0097d12e CB |
2566 | local_irq_disable(); |
2567 | __kvm_guest_enter(); | |
db0758b2 | 2568 | __disable_cpu_timer_accounting(vcpu); |
0097d12e | 2569 | local_irq_enable(); |
a76ccff6 TH |
2570 | exit_reason = sie64a(vcpu->arch.sie_block, |
2571 | vcpu->run->s.regs.gprs); | |
0097d12e | 2572 | local_irq_disable(); |
db0758b2 | 2573 | __enable_cpu_timer_accounting(vcpu); |
0097d12e CB |
2574 | __kvm_guest_exit(); |
2575 | local_irq_enable(); | |
800c1065 | 2576 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
2577 | |
2578 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 2579 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2580 | |
800c1065 | 2581 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2582 | return rc; |
b0c632db HC |
2583 | } |
2584 | ||
b028ee3e DH |
2585 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2586 | { | |
2587 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2588 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2589 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2590 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2591 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2592 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2593 | /* some control register changes require a tlb flush */ |
2594 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2595 | } |
2596 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
4287f247 | 2597 | kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm); |
b028ee3e DH |
2598 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; |
2599 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2600 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2601 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2602 | } | |
2603 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2604 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2605 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2606 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2607 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2608 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e DH |
2609 | } |
2610 | kvm_run->kvm_dirty_regs = 0; | |
2611 | } | |
2612 | ||
2613 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2614 | { | |
2615 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2616 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2617 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2618 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
4287f247 | 2619 | kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu); |
b028ee3e DH |
2620 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; |
2621 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2622 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2623 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2624 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2625 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2626 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
2627 | } | |
2628 | ||
b0c632db HC |
2629 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2630 | { | |
8f2abe6a | 2631 | int rc; |
b0c632db HC |
2632 | sigset_t sigsaved; |
2633 | ||
27291e21 DH |
2634 | if (guestdbg_exit_pending(vcpu)) { |
2635 | kvm_s390_prepare_debug_exit(vcpu); | |
2636 | return 0; | |
2637 | } | |
2638 | ||
b0c632db HC |
2639 | if (vcpu->sigset_active) |
2640 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2641 | ||
6352e4d2 DH |
2642 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2643 | kvm_s390_vcpu_start(vcpu); | |
2644 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 2645 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
2646 | vcpu->vcpu_id); |
2647 | return -EINVAL; | |
2648 | } | |
b0c632db | 2649 | |
b028ee3e | 2650 | sync_regs(vcpu, kvm_run); |
db0758b2 | 2651 | enable_cpu_timer_accounting(vcpu); |
d7b0b5eb | 2652 | |
dab4079d | 2653 | might_fault(); |
a76ccff6 | 2654 | rc = __vcpu_run(vcpu); |
9ace903d | 2655 | |
b1d16c49 CE |
2656 | if (signal_pending(current) && !rc) { |
2657 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2658 | rc = -EINTR; |
b1d16c49 | 2659 | } |
8f2abe6a | 2660 | |
27291e21 DH |
2661 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2662 | kvm_s390_prepare_debug_exit(vcpu); | |
2663 | rc = 0; | |
2664 | } | |
2665 | ||
8f2abe6a | 2666 | if (rc == -EREMOTE) { |
71f116bf | 2667 | /* userspace support is needed, kvm_run has been prepared */ |
8f2abe6a CB |
2668 | rc = 0; |
2669 | } | |
b0c632db | 2670 | |
db0758b2 | 2671 | disable_cpu_timer_accounting(vcpu); |
b028ee3e | 2672 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2673 | |
b0c632db HC |
2674 | if (vcpu->sigset_active) |
2675 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2676 | ||
b0c632db | 2677 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2678 | return rc; |
b0c632db HC |
2679 | } |
2680 | ||
b0c632db HC |
2681 | /* |
2682 | * store status at address | |
2683 | * we use have two special cases: | |
2684 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2685 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2686 | */ | |
d0bce605 | 2687 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2688 | { |
092670cd | 2689 | unsigned char archmode = 1; |
9abc2a08 | 2690 | freg_t fprs[NUM_FPRS]; |
fda902cb | 2691 | unsigned int px; |
4287f247 | 2692 | u64 clkcomp, cputm; |
d0bce605 | 2693 | int rc; |
b0c632db | 2694 | |
d9a3a09a | 2695 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 HC |
2696 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2697 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2698 | return -EFAULT; |
d9a3a09a | 2699 | gpa = 0; |
d0bce605 HC |
2700 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
2701 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2702 | return -EFAULT; |
d9a3a09a MS |
2703 | gpa = px; |
2704 | } else | |
2705 | gpa -= __LC_FPREGS_SAVE_AREA; | |
9abc2a08 DH |
2706 | |
2707 | /* manually convert vector registers if necessary */ | |
2708 | if (MACHINE_HAS_VX) { | |
9522b37f | 2709 | convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); |
9abc2a08 DH |
2710 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, |
2711 | fprs, 128); | |
2712 | } else { | |
2713 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, | |
6fd8e67d | 2714 | vcpu->run->s.regs.fprs, 128); |
9abc2a08 | 2715 | } |
d9a3a09a | 2716 | rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA, |
d0bce605 | 2717 | vcpu->run->s.regs.gprs, 128); |
d9a3a09a | 2718 | rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA, |
d0bce605 | 2719 | &vcpu->arch.sie_block->gpsw, 16); |
d9a3a09a | 2720 | rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA, |
fda902cb | 2721 | &px, 4); |
d9a3a09a | 2722 | rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA, |
9abc2a08 | 2723 | &vcpu->run->s.regs.fpc, 4); |
d9a3a09a | 2724 | rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA, |
d0bce605 | 2725 | &vcpu->arch.sie_block->todpr, 4); |
4287f247 | 2726 | cputm = kvm_s390_get_cpu_timer(vcpu); |
d9a3a09a | 2727 | rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA, |
4287f247 | 2728 | &cputm, 8); |
178bd789 | 2729 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d9a3a09a | 2730 | rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA, |
d0bce605 | 2731 | &clkcomp, 8); |
d9a3a09a | 2732 | rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA, |
d0bce605 | 2733 | &vcpu->run->s.regs.acrs, 64); |
d9a3a09a | 2734 | rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA, |
d0bce605 HC |
2735 | &vcpu->arch.sie_block->gcr, 128); |
2736 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2737 | } |
2738 | ||
e879892c TH |
2739 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2740 | { | |
2741 | /* | |
2742 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
2743 | * copying in vcpu load/put. Lets update our copies before we save | |
2744 | * it into the save area | |
2745 | */ | |
d0164ee2 | 2746 | save_fpu_regs(); |
9abc2a08 | 2747 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
e879892c TH |
2748 | save_access_regs(vcpu->run->s.regs.acrs); |
2749 | ||
2750 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2751 | } | |
2752 | ||
bc17de7c EF |
2753 | /* |
2754 | * store additional status at address | |
2755 | */ | |
2756 | int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, | |
2757 | unsigned long gpa) | |
2758 | { | |
2759 | /* Only bits 0-53 are used for address formation */ | |
2760 | if (!(gpa & ~0x3ff)) | |
2761 | return 0; | |
2762 | ||
2763 | return write_guest_abs(vcpu, gpa & ~0x3ff, | |
2764 | (void *)&vcpu->run->s.regs.vrs, 512); | |
2765 | } | |
2766 | ||
2767 | int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
2768 | { | |
2769 | if (!test_kvm_facility(vcpu->kvm, 129)) | |
2770 | return 0; | |
2771 | ||
2772 | /* | |
2773 | * The guest VXRS are in the host VXRs due to the lazy | |
9977e886 HB |
2774 | * copying in vcpu load/put. We can simply call save_fpu_regs() |
2775 | * to save the current register state because we are in the | |
2776 | * middle of a load/put cycle. | |
2777 | * | |
2778 | * Let's update our copies before we save it into the save area. | |
bc17de7c | 2779 | */ |
d0164ee2 | 2780 | save_fpu_regs(); |
bc17de7c EF |
2781 | |
2782 | return kvm_s390_store_adtl_status_unloaded(vcpu, addr); | |
2783 | } | |
2784 | ||
8ad35755 DH |
2785 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2786 | { | |
2787 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 2788 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
2789 | } |
2790 | ||
2791 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2792 | { | |
2793 | unsigned int i; | |
2794 | struct kvm_vcpu *vcpu; | |
2795 | ||
2796 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2797 | __disable_ibs_on_vcpu(vcpu); | |
2798 | } | |
2799 | } | |
2800 | ||
2801 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2802 | { | |
09a400e7 DH |
2803 | if (!sclp.has_ibs) |
2804 | return; | |
8ad35755 | 2805 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); |
8e236546 | 2806 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
2807 | } |
2808 | ||
6852d7b6 DH |
2809 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2810 | { | |
8ad35755 DH |
2811 | int i, online_vcpus, started_vcpus = 0; |
2812 | ||
2813 | if (!is_vcpu_stopped(vcpu)) | |
2814 | return; | |
2815 | ||
6852d7b6 | 2816 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2817 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2818 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2819 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2820 | ||
2821 | for (i = 0; i < online_vcpus; i++) { | |
2822 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2823 | started_vcpus++; | |
2824 | } | |
2825 | ||
2826 | if (started_vcpus == 0) { | |
2827 | /* we're the only active VCPU -> speed it up */ | |
2828 | __enable_ibs_on_vcpu(vcpu); | |
2829 | } else if (started_vcpus == 1) { | |
2830 | /* | |
2831 | * As we are starting a second VCPU, we have to disable | |
2832 | * the IBS facility on all VCPUs to remove potentially | |
2833 | * oustanding ENABLE requests. | |
2834 | */ | |
2835 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2836 | } | |
2837 | ||
805de8f4 | 2838 | atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2839 | /* |
2840 | * Another VCPU might have used IBS while we were offline. | |
2841 | * Let's play safe and flush the VCPU at startup. | |
2842 | */ | |
d3d692c8 | 2843 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2844 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2845 | return; |
6852d7b6 DH |
2846 | } |
2847 | ||
2848 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2849 | { | |
8ad35755 DH |
2850 | int i, online_vcpus, started_vcpus = 0; |
2851 | struct kvm_vcpu *started_vcpu = NULL; | |
2852 | ||
2853 | if (is_vcpu_stopped(vcpu)) | |
2854 | return; | |
2855 | ||
6852d7b6 | 2856 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2857 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2858 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2859 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2860 | ||
32f5ff63 | 2861 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2862 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2863 | |
805de8f4 | 2864 | atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2865 | __disable_ibs_on_vcpu(vcpu); |
2866 | ||
2867 | for (i = 0; i < online_vcpus; i++) { | |
2868 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2869 | started_vcpus++; | |
2870 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2871 | } | |
2872 | } | |
2873 | ||
2874 | if (started_vcpus == 1) { | |
2875 | /* | |
2876 | * As we only have one VCPU left, we want to enable the | |
2877 | * IBS facility for that VCPU to speed it up. | |
2878 | */ | |
2879 | __enable_ibs_on_vcpu(started_vcpu); | |
2880 | } | |
2881 | ||
433b9ee4 | 2882 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2883 | return; |
6852d7b6 DH |
2884 | } |
2885 | ||
d6712df9 CH |
2886 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2887 | struct kvm_enable_cap *cap) | |
2888 | { | |
2889 | int r; | |
2890 | ||
2891 | if (cap->flags) | |
2892 | return -EINVAL; | |
2893 | ||
2894 | switch (cap->cap) { | |
fa6b7fe9 CH |
2895 | case KVM_CAP_S390_CSS_SUPPORT: |
2896 | if (!vcpu->kvm->arch.css_support) { | |
2897 | vcpu->kvm->arch.css_support = 1; | |
c92ea7b9 | 2898 | VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
fa6b7fe9 CH |
2899 | trace_kvm_s390_enable_css(vcpu->kvm); |
2900 | } | |
2901 | r = 0; | |
2902 | break; | |
d6712df9 CH |
2903 | default: |
2904 | r = -EINVAL; | |
2905 | break; | |
2906 | } | |
2907 | return r; | |
2908 | } | |
2909 | ||
41408c28 TH |
2910 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
2911 | struct kvm_s390_mem_op *mop) | |
2912 | { | |
2913 | void __user *uaddr = (void __user *)mop->buf; | |
2914 | void *tmpbuf = NULL; | |
2915 | int r, srcu_idx; | |
2916 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
2917 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
2918 | ||
2919 | if (mop->flags & ~supported_flags) | |
2920 | return -EINVAL; | |
2921 | ||
2922 | if (mop->size > MEM_OP_MAX_SIZE) | |
2923 | return -E2BIG; | |
2924 | ||
2925 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
2926 | tmpbuf = vmalloc(mop->size); | |
2927 | if (!tmpbuf) | |
2928 | return -ENOMEM; | |
2929 | } | |
2930 | ||
2931 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2932 | ||
2933 | switch (mop->op) { | |
2934 | case KVM_S390_MEMOP_LOGICAL_READ: | |
2935 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
2936 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
2937 | mop->size, GACC_FETCH); | |
41408c28 TH |
2938 | break; |
2939 | } | |
2940 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2941 | if (r == 0) { | |
2942 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
2943 | r = -EFAULT; | |
2944 | } | |
2945 | break; | |
2946 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
2947 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
2948 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
2949 | mop->size, GACC_STORE); | |
41408c28 TH |
2950 | break; |
2951 | } | |
2952 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
2953 | r = -EFAULT; | |
2954 | break; | |
2955 | } | |
2956 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2957 | break; | |
2958 | default: | |
2959 | r = -EINVAL; | |
2960 | } | |
2961 | ||
2962 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
2963 | ||
2964 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
2965 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
2966 | ||
2967 | vfree(tmpbuf); | |
2968 | return r; | |
2969 | } | |
2970 | ||
b0c632db HC |
2971 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2972 | unsigned int ioctl, unsigned long arg) | |
2973 | { | |
2974 | struct kvm_vcpu *vcpu = filp->private_data; | |
2975 | void __user *argp = (void __user *)arg; | |
800c1065 | 2976 | int idx; |
bc923cc9 | 2977 | long r; |
b0c632db | 2978 | |
93736624 | 2979 | switch (ioctl) { |
47b43c52 JF |
2980 | case KVM_S390_IRQ: { |
2981 | struct kvm_s390_irq s390irq; | |
2982 | ||
2983 | r = -EFAULT; | |
2984 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
2985 | break; | |
2986 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
2987 | break; | |
2988 | } | |
93736624 | 2989 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 2990 | struct kvm_s390_interrupt s390int; |
383d0b05 | 2991 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 2992 | |
93736624 | 2993 | r = -EFAULT; |
ba5c1e9b | 2994 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 2995 | break; |
383d0b05 JF |
2996 | if (s390int_to_s390irq(&s390int, &s390irq)) |
2997 | return -EINVAL; | |
2998 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 2999 | break; |
ba5c1e9b | 3000 | } |
b0c632db | 3001 | case KVM_S390_STORE_STATUS: |
800c1065 | 3002 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 3003 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 3004 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 3005 | break; |
b0c632db HC |
3006 | case KVM_S390_SET_INITIAL_PSW: { |
3007 | psw_t psw; | |
3008 | ||
bc923cc9 | 3009 | r = -EFAULT; |
b0c632db | 3010 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
3011 | break; |
3012 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
3013 | break; | |
b0c632db HC |
3014 | } |
3015 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
3016 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
3017 | break; | |
14eebd91 CO |
3018 | case KVM_SET_ONE_REG: |
3019 | case KVM_GET_ONE_REG: { | |
3020 | struct kvm_one_reg reg; | |
3021 | r = -EFAULT; | |
3022 | if (copy_from_user(®, argp, sizeof(reg))) | |
3023 | break; | |
3024 | if (ioctl == KVM_SET_ONE_REG) | |
3025 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
3026 | else | |
3027 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
3028 | break; | |
3029 | } | |
27e0393f CO |
3030 | #ifdef CONFIG_KVM_S390_UCONTROL |
3031 | case KVM_S390_UCAS_MAP: { | |
3032 | struct kvm_s390_ucas_mapping ucasmap; | |
3033 | ||
3034 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
3035 | r = -EFAULT; | |
3036 | break; | |
3037 | } | |
3038 | ||
3039 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
3040 | r = -EINVAL; | |
3041 | break; | |
3042 | } | |
3043 | ||
3044 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
3045 | ucasmap.vcpu_addr, ucasmap.length); | |
3046 | break; | |
3047 | } | |
3048 | case KVM_S390_UCAS_UNMAP: { | |
3049 | struct kvm_s390_ucas_mapping ucasmap; | |
3050 | ||
3051 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
3052 | r = -EFAULT; | |
3053 | break; | |
3054 | } | |
3055 | ||
3056 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
3057 | r = -EINVAL; | |
3058 | break; | |
3059 | } | |
3060 | ||
3061 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
3062 | ucasmap.length); | |
3063 | break; | |
3064 | } | |
3065 | #endif | |
ccc7910f | 3066 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 3067 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
3068 | break; |
3069 | } | |
d6712df9 CH |
3070 | case KVM_ENABLE_CAP: |
3071 | { | |
3072 | struct kvm_enable_cap cap; | |
3073 | r = -EFAULT; | |
3074 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3075 | break; | |
3076 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3077 | break; | |
3078 | } | |
41408c28 TH |
3079 | case KVM_S390_MEM_OP: { |
3080 | struct kvm_s390_mem_op mem_op; | |
3081 | ||
3082 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
3083 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
3084 | else | |
3085 | r = -EFAULT; | |
3086 | break; | |
3087 | } | |
816c7667 JF |
3088 | case KVM_S390_SET_IRQ_STATE: { |
3089 | struct kvm_s390_irq_state irq_state; | |
3090 | ||
3091 | r = -EFAULT; | |
3092 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
3093 | break; | |
3094 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
3095 | irq_state.len == 0 || | |
3096 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
3097 | r = -EINVAL; | |
3098 | break; | |
3099 | } | |
3100 | r = kvm_s390_set_irq_state(vcpu, | |
3101 | (void __user *) irq_state.buf, | |
3102 | irq_state.len); | |
3103 | break; | |
3104 | } | |
3105 | case KVM_S390_GET_IRQ_STATE: { | |
3106 | struct kvm_s390_irq_state irq_state; | |
3107 | ||
3108 | r = -EFAULT; | |
3109 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
3110 | break; | |
3111 | if (irq_state.len == 0) { | |
3112 | r = -EINVAL; | |
3113 | break; | |
3114 | } | |
3115 | r = kvm_s390_get_irq_state(vcpu, | |
3116 | (__u8 __user *) irq_state.buf, | |
3117 | irq_state.len); | |
3118 | break; | |
3119 | } | |
b0c632db | 3120 | default: |
3e6afcf1 | 3121 | r = -ENOTTY; |
b0c632db | 3122 | } |
bc923cc9 | 3123 | return r; |
b0c632db HC |
3124 | } |
3125 | ||
5b1c1493 CO |
3126 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3127 | { | |
3128 | #ifdef CONFIG_KVM_S390_UCONTROL | |
3129 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
3130 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
3131 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
3132 | get_page(vmf->page); | |
3133 | return 0; | |
3134 | } | |
3135 | #endif | |
3136 | return VM_FAULT_SIGBUS; | |
3137 | } | |
3138 | ||
5587027c AK |
3139 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
3140 | unsigned long npages) | |
db3fe4eb TY |
3141 | { |
3142 | return 0; | |
3143 | } | |
3144 | ||
b0c632db | 3145 | /* Section: memory related */ |
f7784b8e MT |
3146 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
3147 | struct kvm_memory_slot *memslot, | |
09170a49 | 3148 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 3149 | enum kvm_mr_change change) |
b0c632db | 3150 | { |
dd2887e7 NW |
3151 | /* A few sanity checks. We can have memory slots which have to be |
3152 | located/ended at a segment boundary (1MB). The memory in userland is | |
3153 | ok to be fragmented into various different vmas. It is okay to mmap() | |
3154 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 3155 | |
598841ca | 3156 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
3157 | return -EINVAL; |
3158 | ||
598841ca | 3159 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
3160 | return -EINVAL; |
3161 | ||
a3a92c31 DD |
3162 | if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit) |
3163 | return -EINVAL; | |
3164 | ||
f7784b8e MT |
3165 | return 0; |
3166 | } | |
3167 | ||
3168 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 3169 | const struct kvm_userspace_memory_region *mem, |
8482644a | 3170 | const struct kvm_memory_slot *old, |
f36f3f28 | 3171 | const struct kvm_memory_slot *new, |
8482644a | 3172 | enum kvm_mr_change change) |
f7784b8e | 3173 | { |
f7850c92 | 3174 | int rc; |
f7784b8e | 3175 | |
2cef4deb CB |
3176 | /* If the basics of the memslot do not change, we do not want |
3177 | * to update the gmap. Every update causes several unnecessary | |
3178 | * segment translation exceptions. This is usually handled just | |
3179 | * fine by the normal fault handler + gmap, but it will also | |
3180 | * cause faults on the prefix page of running guest CPUs. | |
3181 | */ | |
3182 | if (old->userspace_addr == mem->userspace_addr && | |
3183 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
3184 | old->npages * PAGE_SIZE == mem->memory_size) | |
3185 | return; | |
598841ca CO |
3186 | |
3187 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
3188 | mem->guest_phys_addr, mem->memory_size); | |
3189 | if (rc) | |
ea2cdd27 | 3190 | pr_warn("failed to commit memory region\n"); |
598841ca | 3191 | return; |
b0c632db HC |
3192 | } |
3193 | ||
60a37709 AY |
3194 | static inline unsigned long nonhyp_mask(int i) |
3195 | { | |
3196 | unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30; | |
3197 | ||
3198 | return 0x0000ffffffffffffUL >> (nonhyp_fai << 4); | |
3199 | } | |
3200 | ||
3491caf2 CB |
3201 | void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) |
3202 | { | |
3203 | vcpu->valid_wakeup = false; | |
3204 | } | |
3205 | ||
b0c632db HC |
3206 | static int __init kvm_s390_init(void) |
3207 | { | |
60a37709 AY |
3208 | int i; |
3209 | ||
07197fd0 DH |
3210 | if (!sclp.has_sief2) { |
3211 | pr_info("SIE not available\n"); | |
3212 | return -ENODEV; | |
3213 | } | |
3214 | ||
60a37709 AY |
3215 | for (i = 0; i < 16; i++) |
3216 | kvm_s390_fac_list_mask[i] |= | |
3217 | S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i); | |
3218 | ||
9d8d5786 | 3219 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
3220 | } |
3221 | ||
3222 | static void __exit kvm_s390_exit(void) | |
3223 | { | |
3224 | kvm_exit(); | |
3225 | } | |
3226 | ||
3227 | module_init(kvm_s390_init); | |
3228 | module_exit(kvm_s390_exit); | |
566af940 CH |
3229 | |
3230 | /* | |
3231 | * Enable autoloading of the kvm module. | |
3232 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
3233 | * since x86 takes a different approach. | |
3234 | */ | |
3235 | #include <linux/miscdevice.h> | |
3236 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
3237 | MODULE_ALIAS("devname:kvm"); |