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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> | |
b2d73b2a | 24 | #include <linux/mman.h> |
b0c632db | 25 | #include <linux/module.h> |
d3217967 | 26 | #include <linux/moduleparam.h> |
a374e892 | 27 | #include <linux/random.h> |
b0c632db | 28 | #include <linux/slab.h> |
ba5c1e9b | 29 | #include <linux/timer.h> |
41408c28 | 30 | #include <linux/vmalloc.h> |
15c9705f | 31 | #include <linux/bitmap.h> |
174cd4b1 | 32 | #include <linux/sched/signal.h> |
190df4a2 | 33 | #include <linux/string.h> |
174cd4b1 | 34 | |
cbb870c8 | 35 | #include <asm/asm-offsets.h> |
b0c632db | 36 | #include <asm/lowcore.h> |
fd5ada04 | 37 | #include <asm/stp.h> |
b0c632db | 38 | #include <asm/pgtable.h> |
1e133ab2 | 39 | #include <asm/gmap.h> |
f5daba1d | 40 | #include <asm/nmi.h> |
a0616cde | 41 | #include <asm/switch_to.h> |
6d3da241 | 42 | #include <asm/isc.h> |
1526bf9c | 43 | #include <asm/sclp.h> |
0a763c78 | 44 | #include <asm/cpacf.h> |
221bb8a4 | 45 | #include <asm/timex.h> |
8f2abe6a | 46 | #include "kvm-s390.h" |
b0c632db HC |
47 | #include "gaccess.h" |
48 | ||
ea2cdd27 DH |
49 | #define KMSG_COMPONENT "kvm-s390" |
50 | #undef pr_fmt | |
51 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
52 | ||
5786fffa CH |
53 | #define CREATE_TRACE_POINTS |
54 | #include "trace.h" | |
ade38c31 | 55 | #include "trace-s390.h" |
5786fffa | 56 | |
41408c28 | 57 | #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
816c7667 JF |
58 | #define LOCAL_IRQS 32 |
59 | #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ | |
60 | (KVM_MAX_VCPUS + LOCAL_IRQS)) | |
41408c28 | 61 | |
b0c632db HC |
62 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
63 | ||
64 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
65 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 66 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
67 | { "exit_validity", VCPU_STAT(exit_validity) }, |
68 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
69 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
70 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b | 71 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
9ec6de19 | 72 | { "exit_pei", VCPU_STAT(exit_pei) }, |
ba5c1e9b CO |
73 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, |
74 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
a011eeb2 | 75 | { "exit_operation_exception", VCPU_STAT(exit_operation_exception) }, |
f7819512 | 76 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 77 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 78 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ce2e4f0b | 79 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 80 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 81 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
82 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
83 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 84 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 85 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
86 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
87 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
88 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
89 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
90 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
91 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
92 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 93 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
94 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
95 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
96 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
97 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
98 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 99 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
100 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
101 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 102 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
103 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
104 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 105 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
95ca2cb5 | 106 | { "instruction_sthyi", VCPU_STAT(instruction_sthyi) }, |
a3508fbe | 107 | { "instruction_sie", VCPU_STAT(instruction_sie) }, |
5288fbf0 | 108 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 109 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 110 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 111 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
112 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
113 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 114 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
115 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
116 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 117 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
118 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
119 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
120 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
121 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
122 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
123 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 124 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 125 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 126 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
175a5c9e CB |
127 | { "diagnose_258", VCPU_STAT(diagnose_258) }, |
128 | { "diagnose_308", VCPU_STAT(diagnose_308) }, | |
129 | { "diagnose_500", VCPU_STAT(diagnose_500) }, | |
b0c632db HC |
130 | { NULL } |
131 | }; | |
132 | ||
a411edf1 DH |
133 | /* allow nested virtualization in KVM (if enabled by user space) */ |
134 | static int nested; | |
135 | module_param(nested, int, S_IRUGO); | |
136 | MODULE_PARM_DESC(nested, "Nested virtualization support"); | |
137 | ||
9d8d5786 | 138 | /* upper facilities limit for kvm */ |
f6c1d359 | 139 | unsigned long kvm_s390_fac_list_mask[16] = { FACILITIES_KVM }; |
b0c632db | 140 | |
9d8d5786 | 141 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 142 | { |
9d8d5786 MM |
143 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
144 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
145 | } |
146 | ||
15c9705f DH |
147 | /* available cpu features supported by kvm */ |
148 | static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); | |
0a763c78 DH |
149 | /* available subfunctions indicated via query / "test bit" */ |
150 | static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc; | |
15c9705f | 151 | |
9d8d5786 | 152 | static struct gmap_notifier gmap_notifier; |
a3508fbe | 153 | static struct gmap_notifier vsie_gmap_notifier; |
78f26131 | 154 | debug_info_t *kvm_s390_dbf; |
9d8d5786 | 155 | |
b0c632db | 156 | /* Section: not file related */ |
13a34e06 | 157 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
158 | { |
159 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 160 | return 0; |
b0c632db HC |
161 | } |
162 | ||
414d3b07 MS |
163 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
164 | unsigned long end); | |
2c70fe44 | 165 | |
fdf03650 FZ |
166 | /* |
167 | * This callback is executed during stop_machine(). All CPUs are therefore | |
168 | * temporarily stopped. In order not to change guest behavior, we have to | |
169 | * disable preemption whenever we touch the epoch of kvm and the VCPUs, | |
170 | * so a CPU won't be stopped while calculating with the epoch. | |
171 | */ | |
172 | static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, | |
173 | void *v) | |
174 | { | |
175 | struct kvm *kvm; | |
176 | struct kvm_vcpu *vcpu; | |
177 | int i; | |
178 | unsigned long long *delta = v; | |
179 | ||
180 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
181 | kvm->arch.epoch -= *delta; | |
182 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
183 | vcpu->arch.sie_block->epoch -= *delta; | |
db0758b2 DH |
184 | if (vcpu->arch.cputm_enabled) |
185 | vcpu->arch.cputm_start += *delta; | |
91473b48 DH |
186 | if (vcpu->arch.vsie_block) |
187 | vcpu->arch.vsie_block->epoch -= *delta; | |
fdf03650 FZ |
188 | } |
189 | } | |
190 | return NOTIFY_OK; | |
191 | } | |
192 | ||
193 | static struct notifier_block kvm_clock_notifier = { | |
194 | .notifier_call = kvm_clock_sync, | |
195 | }; | |
196 | ||
b0c632db HC |
197 | int kvm_arch_hardware_setup(void) |
198 | { | |
2c70fe44 | 199 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
b2d73b2a | 200 | gmap_register_pte_notifier(&gmap_notifier); |
a3508fbe DH |
201 | vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier; |
202 | gmap_register_pte_notifier(&vsie_gmap_notifier); | |
fdf03650 FZ |
203 | atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
204 | &kvm_clock_notifier); | |
b0c632db HC |
205 | return 0; |
206 | } | |
207 | ||
208 | void kvm_arch_hardware_unsetup(void) | |
209 | { | |
b2d73b2a | 210 | gmap_unregister_pte_notifier(&gmap_notifier); |
a3508fbe | 211 | gmap_unregister_pte_notifier(&vsie_gmap_notifier); |
fdf03650 FZ |
212 | atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
213 | &kvm_clock_notifier); | |
b0c632db HC |
214 | } |
215 | ||
22be5a13 DH |
216 | static void allow_cpu_feat(unsigned long nr) |
217 | { | |
218 | set_bit_inv(nr, kvm_s390_available_cpu_feat); | |
219 | } | |
220 | ||
0a763c78 DH |
221 | static inline int plo_test_bit(unsigned char nr) |
222 | { | |
223 | register unsigned long r0 asm("0") = (unsigned long) nr | 0x100; | |
d051ae53 | 224 | int cc; |
0a763c78 DH |
225 | |
226 | asm volatile( | |
227 | /* Parameter registers are ignored for "test bit" */ | |
228 | " plo 0,0,0,0(0)\n" | |
229 | " ipm %0\n" | |
230 | " srl %0,28\n" | |
231 | : "=d" (cc) | |
232 | : "d" (r0) | |
233 | : "cc"); | |
234 | return cc == 0; | |
235 | } | |
236 | ||
22be5a13 DH |
237 | static void kvm_s390_cpu_feat_init(void) |
238 | { | |
0a763c78 DH |
239 | int i; |
240 | ||
241 | for (i = 0; i < 256; ++i) { | |
242 | if (plo_test_bit(i)) | |
243 | kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7); | |
244 | } | |
245 | ||
246 | if (test_facility(28)) /* TOD-clock steering */ | |
221bb8a4 LT |
247 | ptff(kvm_s390_available_subfunc.ptff, |
248 | sizeof(kvm_s390_available_subfunc.ptff), | |
249 | PTFF_QAF); | |
0a763c78 DH |
250 | |
251 | if (test_facility(17)) { /* MSA */ | |
69c0e360 MS |
252 | __cpacf_query(CPACF_KMAC, (cpacf_mask_t *) |
253 | kvm_s390_available_subfunc.kmac); | |
254 | __cpacf_query(CPACF_KMC, (cpacf_mask_t *) | |
255 | kvm_s390_available_subfunc.kmc); | |
256 | __cpacf_query(CPACF_KM, (cpacf_mask_t *) | |
257 | kvm_s390_available_subfunc.km); | |
258 | __cpacf_query(CPACF_KIMD, (cpacf_mask_t *) | |
259 | kvm_s390_available_subfunc.kimd); | |
260 | __cpacf_query(CPACF_KLMD, (cpacf_mask_t *) | |
261 | kvm_s390_available_subfunc.klmd); | |
0a763c78 DH |
262 | } |
263 | if (test_facility(76)) /* MSA3 */ | |
69c0e360 MS |
264 | __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *) |
265 | kvm_s390_available_subfunc.pckmo); | |
0a763c78 | 266 | if (test_facility(77)) { /* MSA4 */ |
69c0e360 MS |
267 | __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *) |
268 | kvm_s390_available_subfunc.kmctr); | |
269 | __cpacf_query(CPACF_KMF, (cpacf_mask_t *) | |
270 | kvm_s390_available_subfunc.kmf); | |
271 | __cpacf_query(CPACF_KMO, (cpacf_mask_t *) | |
272 | kvm_s390_available_subfunc.kmo); | |
273 | __cpacf_query(CPACF_PCC, (cpacf_mask_t *) | |
274 | kvm_s390_available_subfunc.pcc); | |
0a763c78 DH |
275 | } |
276 | if (test_facility(57)) /* MSA5 */ | |
985a9d20 | 277 | __cpacf_query(CPACF_PRNO, (cpacf_mask_t *) |
69c0e360 | 278 | kvm_s390_available_subfunc.ppno); |
0a763c78 | 279 | |
e000b8e0 JH |
280 | if (test_facility(146)) /* MSA8 */ |
281 | __cpacf_query(CPACF_KMA, (cpacf_mask_t *) | |
282 | kvm_s390_available_subfunc.kma); | |
283 | ||
22be5a13 DH |
284 | if (MACHINE_HAS_ESOP) |
285 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP); | |
a3508fbe DH |
286 | /* |
287 | * We need SIE support, ESOP (PROT_READ protection for gmap_shadow), | |
288 | * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing). | |
289 | */ | |
290 | if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao || | |
a411edf1 | 291 | !test_facility(3) || !nested) |
a3508fbe DH |
292 | return; |
293 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2); | |
19c439b5 DH |
294 | if (sclp.has_64bscao) |
295 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO); | |
0615a326 DH |
296 | if (sclp.has_siif) |
297 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF); | |
77d18f6d DH |
298 | if (sclp.has_gpere) |
299 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE); | |
a1b7b9b2 DH |
300 | if (sclp.has_gsls) |
301 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS); | |
5630a8e8 DH |
302 | if (sclp.has_ib) |
303 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB); | |
13ee3f67 DH |
304 | if (sclp.has_cei) |
305 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI); | |
7fd7f39d DH |
306 | if (sclp.has_ibs) |
307 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS); | |
730cd632 FA |
308 | if (sclp.has_kss) |
309 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS); | |
5d3876a8 DH |
310 | /* |
311 | * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make | |
312 | * all skey handling functions read/set the skey from the PGSTE | |
313 | * instead of the real storage key. | |
314 | * | |
315 | * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make | |
316 | * pages being detected as preserved although they are resident. | |
317 | * | |
318 | * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will | |
319 | * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY. | |
320 | * | |
321 | * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and | |
322 | * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be | |
323 | * correctly shadowed. We can do that for the PGSTE but not for PTE.I. | |
324 | * | |
325 | * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We | |
326 | * cannot easily shadow the SCA because of the ipte lock. | |
327 | */ | |
22be5a13 DH |
328 | } |
329 | ||
b0c632db HC |
330 | int kvm_arch_init(void *opaque) |
331 | { | |
78f26131 CB |
332 | kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
333 | if (!kvm_s390_dbf) | |
334 | return -ENOMEM; | |
335 | ||
336 | if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) { | |
337 | debug_unregister(kvm_s390_dbf); | |
338 | return -ENOMEM; | |
339 | } | |
340 | ||
22be5a13 DH |
341 | kvm_s390_cpu_feat_init(); |
342 | ||
84877d93 CH |
343 | /* Register floating interrupt controller interface. */ |
344 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
345 | } |
346 | ||
78f26131 CB |
347 | void kvm_arch_exit(void) |
348 | { | |
349 | debug_unregister(kvm_s390_dbf); | |
350 | } | |
351 | ||
b0c632db HC |
352 | /* Section: device related */ |
353 | long kvm_arch_dev_ioctl(struct file *filp, | |
354 | unsigned int ioctl, unsigned long arg) | |
355 | { | |
356 | if (ioctl == KVM_S390_ENABLE_SIE) | |
357 | return s390_enable_sie(); | |
358 | return -EINVAL; | |
359 | } | |
360 | ||
784aa3d7 | 361 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 362 | { |
d7b0b5eb CO |
363 | int r; |
364 | ||
2bd0ac4e | 365 | switch (ext) { |
d7b0b5eb | 366 | case KVM_CAP_S390_PSW: |
b6cf8788 | 367 | case KVM_CAP_S390_GMAP: |
52e16b18 | 368 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
369 | #ifdef CONFIG_KVM_S390_UCONTROL |
370 | case KVM_CAP_S390_UCONTROL: | |
371 | #endif | |
3c038e6b | 372 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 373 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 374 | case KVM_CAP_ONE_REG: |
d6712df9 | 375 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 376 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 377 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 378 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 379 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 380 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 381 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 382 | case KVM_CAP_MP_STATE: |
460df4c1 | 383 | case KVM_CAP_IMMEDIATE_EXIT: |
47b43c52 | 384 | case KVM_CAP_S390_INJECT_IRQ: |
2444b352 | 385 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 386 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 387 | case KVM_CAP_S390_SKEYS: |
816c7667 | 388 | case KVM_CAP_S390_IRQ_STATE: |
6502a34c | 389 | case KVM_CAP_S390_USER_INSTR0: |
4036e387 | 390 | case KVM_CAP_S390_CMMA_MIGRATION: |
47a4693e | 391 | case KVM_CAP_S390_AIS: |
d7b0b5eb CO |
392 | r = 1; |
393 | break; | |
41408c28 TH |
394 | case KVM_CAP_S390_MEM_OP: |
395 | r = MEM_OP_MAX_SIZE; | |
396 | break; | |
e726b1bd CB |
397 | case KVM_CAP_NR_VCPUS: |
398 | case KVM_CAP_MAX_VCPUS: | |
76a6dd72 | 399 | r = KVM_S390_BSCA_CPU_SLOTS; |
a6940674 DH |
400 | if (!kvm_s390_use_sca_entries()) |
401 | r = KVM_MAX_VCPUS; | |
402 | else if (sclp.has_esca && sclp.has_64bscao) | |
76a6dd72 | 403 | r = KVM_S390_ESCA_CPU_SLOTS; |
e726b1bd | 404 | break; |
e1e2e605 NW |
405 | case KVM_CAP_NR_MEMSLOTS: |
406 | r = KVM_USER_MEM_SLOTS; | |
407 | break; | |
1526bf9c | 408 | case KVM_CAP_S390_COW: |
abf09bed | 409 | r = MACHINE_HAS_ESOP; |
1526bf9c | 410 | break; |
68c55750 EF |
411 | case KVM_CAP_S390_VECTOR_REGISTERS: |
412 | r = MACHINE_HAS_VX; | |
413 | break; | |
c6e5f166 FZ |
414 | case KVM_CAP_S390_RI: |
415 | r = test_facility(64); | |
416 | break; | |
4e0b1ab7 FZ |
417 | case KVM_CAP_S390_GS: |
418 | r = test_facility(133); | |
419 | break; | |
2bd0ac4e | 420 | default: |
d7b0b5eb | 421 | r = 0; |
2bd0ac4e | 422 | } |
d7b0b5eb | 423 | return r; |
b0c632db HC |
424 | } |
425 | ||
15f36ebd JH |
426 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
427 | struct kvm_memory_slot *memslot) | |
428 | { | |
429 | gfn_t cur_gfn, last_gfn; | |
430 | unsigned long address; | |
431 | struct gmap *gmap = kvm->arch.gmap; | |
432 | ||
15f36ebd JH |
433 | /* Loop over all guest pages */ |
434 | last_gfn = memslot->base_gfn + memslot->npages; | |
435 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
436 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
437 | ||
1e133ab2 | 438 | if (test_and_clear_guest_dirty(gmap->mm, address)) |
15f36ebd | 439 | mark_page_dirty(kvm, cur_gfn); |
1763f8d0 CB |
440 | if (fatal_signal_pending(current)) |
441 | return; | |
70c88a00 | 442 | cond_resched(); |
15f36ebd | 443 | } |
15f36ebd JH |
444 | } |
445 | ||
b0c632db | 446 | /* Section: vm related */ |
a6e2f683 ED |
447 | static void sca_del_vcpu(struct kvm_vcpu *vcpu); |
448 | ||
b0c632db HC |
449 | /* |
450 | * Get (and clear) the dirty memory log for a memory slot. | |
451 | */ | |
452 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
453 | struct kvm_dirty_log *log) | |
454 | { | |
15f36ebd JH |
455 | int r; |
456 | unsigned long n; | |
9f6b8029 | 457 | struct kvm_memslots *slots; |
15f36ebd JH |
458 | struct kvm_memory_slot *memslot; |
459 | int is_dirty = 0; | |
460 | ||
e1e8a962 JF |
461 | if (kvm_is_ucontrol(kvm)) |
462 | return -EINVAL; | |
463 | ||
15f36ebd JH |
464 | mutex_lock(&kvm->slots_lock); |
465 | ||
466 | r = -EINVAL; | |
467 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
468 | goto out; | |
469 | ||
9f6b8029 PB |
470 | slots = kvm_memslots(kvm); |
471 | memslot = id_to_memslot(slots, log->slot); | |
15f36ebd JH |
472 | r = -ENOENT; |
473 | if (!memslot->dirty_bitmap) | |
474 | goto out; | |
475 | ||
476 | kvm_s390_sync_dirty_log(kvm, memslot); | |
477 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
478 | if (r) | |
479 | goto out; | |
480 | ||
481 | /* Clear the dirty log */ | |
482 | if (is_dirty) { | |
483 | n = kvm_dirty_bitmap_bytes(memslot); | |
484 | memset(memslot->dirty_bitmap, 0, n); | |
485 | } | |
486 | r = 0; | |
487 | out: | |
488 | mutex_unlock(&kvm->slots_lock); | |
489 | return r; | |
b0c632db HC |
490 | } |
491 | ||
6502a34c DH |
492 | static void icpt_operexc_on_all_vcpus(struct kvm *kvm) |
493 | { | |
494 | unsigned int i; | |
495 | struct kvm_vcpu *vcpu; | |
496 | ||
497 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
498 | kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu); | |
499 | } | |
500 | } | |
501 | ||
d938dc55 CH |
502 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
503 | { | |
504 | int r; | |
505 | ||
506 | if (cap->flags) | |
507 | return -EINVAL; | |
508 | ||
509 | switch (cap->cap) { | |
84223598 | 510 | case KVM_CAP_S390_IRQCHIP: |
c92ea7b9 | 511 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
84223598 CH |
512 | kvm->arch.use_irqchip = 1; |
513 | r = 0; | |
514 | break; | |
2444b352 | 515 | case KVM_CAP_S390_USER_SIGP: |
c92ea7b9 | 516 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
2444b352 DH |
517 | kvm->arch.user_sigp = 1; |
518 | r = 0; | |
519 | break; | |
68c55750 | 520 | case KVM_CAP_S390_VECTOR_REGISTERS: |
5967c17b | 521 | mutex_lock(&kvm->lock); |
a03825bb | 522 | if (kvm->created_vcpus) { |
5967c17b DH |
523 | r = -EBUSY; |
524 | } else if (MACHINE_HAS_VX) { | |
c54f0d6a DH |
525 | set_kvm_facility(kvm->arch.model.fac_mask, 129); |
526 | set_kvm_facility(kvm->arch.model.fac_list, 129); | |
2f87d942 GH |
527 | if (test_facility(134)) { |
528 | set_kvm_facility(kvm->arch.model.fac_mask, 134); | |
529 | set_kvm_facility(kvm->arch.model.fac_list, 134); | |
530 | } | |
53743aa7 MS |
531 | if (test_facility(135)) { |
532 | set_kvm_facility(kvm->arch.model.fac_mask, 135); | |
533 | set_kvm_facility(kvm->arch.model.fac_list, 135); | |
534 | } | |
18280d8b MM |
535 | r = 0; |
536 | } else | |
537 | r = -EINVAL; | |
5967c17b | 538 | mutex_unlock(&kvm->lock); |
c92ea7b9 CB |
539 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
540 | r ? "(not available)" : "(success)"); | |
68c55750 | 541 | break; |
c6e5f166 FZ |
542 | case KVM_CAP_S390_RI: |
543 | r = -EINVAL; | |
544 | mutex_lock(&kvm->lock); | |
a03825bb | 545 | if (kvm->created_vcpus) { |
c6e5f166 FZ |
546 | r = -EBUSY; |
547 | } else if (test_facility(64)) { | |
c54f0d6a DH |
548 | set_kvm_facility(kvm->arch.model.fac_mask, 64); |
549 | set_kvm_facility(kvm->arch.model.fac_list, 64); | |
c6e5f166 FZ |
550 | r = 0; |
551 | } | |
552 | mutex_unlock(&kvm->lock); | |
553 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s", | |
554 | r ? "(not available)" : "(success)"); | |
555 | break; | |
47a4693e YMZ |
556 | case KVM_CAP_S390_AIS: |
557 | mutex_lock(&kvm->lock); | |
558 | if (kvm->created_vcpus) { | |
559 | r = -EBUSY; | |
560 | } else { | |
561 | set_kvm_facility(kvm->arch.model.fac_mask, 72); | |
562 | set_kvm_facility(kvm->arch.model.fac_list, 72); | |
47a4693e YMZ |
563 | r = 0; |
564 | } | |
565 | mutex_unlock(&kvm->lock); | |
566 | VM_EVENT(kvm, 3, "ENABLE: AIS %s", | |
567 | r ? "(not available)" : "(success)"); | |
568 | break; | |
4e0b1ab7 FZ |
569 | case KVM_CAP_S390_GS: |
570 | r = -EINVAL; | |
571 | mutex_lock(&kvm->lock); | |
572 | if (atomic_read(&kvm->online_vcpus)) { | |
573 | r = -EBUSY; | |
574 | } else if (test_facility(133)) { | |
575 | set_kvm_facility(kvm->arch.model.fac_mask, 133); | |
576 | set_kvm_facility(kvm->arch.model.fac_list, 133); | |
577 | r = 0; | |
578 | } | |
579 | mutex_unlock(&kvm->lock); | |
580 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s", | |
581 | r ? "(not available)" : "(success)"); | |
582 | break; | |
e44fc8c9 | 583 | case KVM_CAP_S390_USER_STSI: |
c92ea7b9 | 584 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
e44fc8c9 ET |
585 | kvm->arch.user_stsi = 1; |
586 | r = 0; | |
587 | break; | |
6502a34c DH |
588 | case KVM_CAP_S390_USER_INSTR0: |
589 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0"); | |
590 | kvm->arch.user_instr0 = 1; | |
591 | icpt_operexc_on_all_vcpus(kvm); | |
592 | r = 0; | |
593 | break; | |
d938dc55 CH |
594 | default: |
595 | r = -EINVAL; | |
596 | break; | |
597 | } | |
598 | return r; | |
599 | } | |
600 | ||
8c0a7ce6 DD |
601 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
602 | { | |
603 | int ret; | |
604 | ||
605 | switch (attr->attr) { | |
606 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
607 | ret = 0; | |
c92ea7b9 | 608 | VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
a3a92c31 DD |
609 | kvm->arch.mem_limit); |
610 | if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr)) | |
8c0a7ce6 DD |
611 | ret = -EFAULT; |
612 | break; | |
613 | default: | |
614 | ret = -ENXIO; | |
615 | break; | |
616 | } | |
617 | return ret; | |
618 | } | |
619 | ||
620 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
621 | { |
622 | int ret; | |
623 | unsigned int idx; | |
624 | switch (attr->attr) { | |
625 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
f9cbd9b0 | 626 | ret = -ENXIO; |
c24cc9c8 | 627 | if (!sclp.has_cmma) |
e6db1d61 DD |
628 | break; |
629 | ||
4f718eab | 630 | ret = -EBUSY; |
c92ea7b9 | 631 | VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
4f718eab | 632 | mutex_lock(&kvm->lock); |
a03825bb | 633 | if (!kvm->created_vcpus) { |
4f718eab DD |
634 | kvm->arch.use_cmma = 1; |
635 | ret = 0; | |
636 | } | |
637 | mutex_unlock(&kvm->lock); | |
638 | break; | |
639 | case KVM_S390_VM_MEM_CLR_CMMA: | |
f9cbd9b0 DH |
640 | ret = -ENXIO; |
641 | if (!sclp.has_cmma) | |
642 | break; | |
c3489155 DD |
643 | ret = -EINVAL; |
644 | if (!kvm->arch.use_cmma) | |
645 | break; | |
646 | ||
c92ea7b9 | 647 | VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
4f718eab DD |
648 | mutex_lock(&kvm->lock); |
649 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 650 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
651 | srcu_read_unlock(&kvm->srcu, idx); |
652 | mutex_unlock(&kvm->lock); | |
653 | ret = 0; | |
654 | break; | |
8c0a7ce6 DD |
655 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
656 | unsigned long new_limit; | |
657 | ||
658 | if (kvm_is_ucontrol(kvm)) | |
659 | return -EINVAL; | |
660 | ||
661 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
662 | return -EFAULT; | |
663 | ||
a3a92c31 DD |
664 | if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT && |
665 | new_limit > kvm->arch.mem_limit) | |
8c0a7ce6 DD |
666 | return -E2BIG; |
667 | ||
a3a92c31 DD |
668 | if (!new_limit) |
669 | return -EINVAL; | |
670 | ||
6ea427bb | 671 | /* gmap_create takes last usable address */ |
a3a92c31 DD |
672 | if (new_limit != KVM_S390_NO_MEM_LIMIT) |
673 | new_limit -= 1; | |
674 | ||
8c0a7ce6 DD |
675 | ret = -EBUSY; |
676 | mutex_lock(&kvm->lock); | |
a03825bb | 677 | if (!kvm->created_vcpus) { |
6ea427bb MS |
678 | /* gmap_create will round the limit up */ |
679 | struct gmap *new = gmap_create(current->mm, new_limit); | |
8c0a7ce6 DD |
680 | |
681 | if (!new) { | |
682 | ret = -ENOMEM; | |
683 | } else { | |
6ea427bb | 684 | gmap_remove(kvm->arch.gmap); |
8c0a7ce6 DD |
685 | new->private = kvm; |
686 | kvm->arch.gmap = new; | |
687 | ret = 0; | |
688 | } | |
689 | } | |
690 | mutex_unlock(&kvm->lock); | |
a3a92c31 DD |
691 | VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit); |
692 | VM_EVENT(kvm, 3, "New guest asce: 0x%pK", | |
693 | (void *) kvm->arch.gmap->asce); | |
8c0a7ce6 DD |
694 | break; |
695 | } | |
4f718eab DD |
696 | default: |
697 | ret = -ENXIO; | |
698 | break; | |
699 | } | |
700 | return ret; | |
701 | } | |
702 | ||
a374e892 TK |
703 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
704 | ||
705 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
706 | { | |
707 | struct kvm_vcpu *vcpu; | |
708 | int i; | |
709 | ||
9d8d5786 | 710 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
711 | return -EINVAL; |
712 | ||
713 | mutex_lock(&kvm->lock); | |
714 | switch (attr->attr) { | |
715 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
716 | get_random_bytes( | |
717 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
718 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
719 | kvm->arch.crypto.aes_kw = 1; | |
c92ea7b9 | 720 | VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
a374e892 TK |
721 | break; |
722 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
723 | get_random_bytes( | |
724 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
725 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
726 | kvm->arch.crypto.dea_kw = 1; | |
c92ea7b9 | 727 | VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
a374e892 TK |
728 | break; |
729 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
730 | kvm->arch.crypto.aes_kw = 0; | |
731 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
732 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
c92ea7b9 | 733 | VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
a374e892 TK |
734 | break; |
735 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
736 | kvm->arch.crypto.dea_kw = 0; | |
737 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
738 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
c92ea7b9 | 739 | VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
a374e892 TK |
740 | break; |
741 | default: | |
742 | mutex_unlock(&kvm->lock); | |
743 | return -ENXIO; | |
744 | } | |
745 | ||
746 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
747 | kvm_s390_vcpu_crypto_setup(vcpu); | |
748 | exit_sie(vcpu); | |
749 | } | |
750 | mutex_unlock(&kvm->lock); | |
751 | return 0; | |
752 | } | |
753 | ||
190df4a2 CI |
754 | static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req) |
755 | { | |
756 | int cx; | |
757 | struct kvm_vcpu *vcpu; | |
758 | ||
759 | kvm_for_each_vcpu(cx, vcpu, kvm) | |
760 | kvm_s390_sync_request(req, vcpu); | |
761 | } | |
762 | ||
763 | /* | |
764 | * Must be called with kvm->srcu held to avoid races on memslots, and with | |
765 | * kvm->lock to avoid races with ourselves and kvm_s390_vm_stop_migration. | |
766 | */ | |
767 | static int kvm_s390_vm_start_migration(struct kvm *kvm) | |
768 | { | |
769 | struct kvm_s390_migration_state *mgs; | |
770 | struct kvm_memory_slot *ms; | |
771 | /* should be the only one */ | |
772 | struct kvm_memslots *slots; | |
773 | unsigned long ram_pages; | |
774 | int slotnr; | |
775 | ||
776 | /* migration mode already enabled */ | |
777 | if (kvm->arch.migration_state) | |
778 | return 0; | |
779 | ||
780 | slots = kvm_memslots(kvm); | |
781 | if (!slots || !slots->used_slots) | |
782 | return -EINVAL; | |
783 | ||
784 | mgs = kzalloc(sizeof(*mgs), GFP_KERNEL); | |
785 | if (!mgs) | |
786 | return -ENOMEM; | |
787 | kvm->arch.migration_state = mgs; | |
788 | ||
789 | if (kvm->arch.use_cmma) { | |
790 | /* | |
791 | * Get the last slot. They should be sorted by base_gfn, so the | |
792 | * last slot is also the one at the end of the address space. | |
793 | * We have verified above that at least one slot is present. | |
794 | */ | |
795 | ms = slots->memslots + slots->used_slots - 1; | |
796 | /* round up so we only use full longs */ | |
797 | ram_pages = roundup(ms->base_gfn + ms->npages, BITS_PER_LONG); | |
798 | /* allocate enough bytes to store all the bits */ | |
799 | mgs->pgste_bitmap = vmalloc(ram_pages / 8); | |
800 | if (!mgs->pgste_bitmap) { | |
801 | kfree(mgs); | |
802 | kvm->arch.migration_state = NULL; | |
803 | return -ENOMEM; | |
804 | } | |
805 | ||
806 | mgs->bitmap_size = ram_pages; | |
807 | atomic64_set(&mgs->dirty_pages, ram_pages); | |
808 | /* mark all the pages in active slots as dirty */ | |
809 | for (slotnr = 0; slotnr < slots->used_slots; slotnr++) { | |
810 | ms = slots->memslots + slotnr; | |
811 | bitmap_set(mgs->pgste_bitmap, ms->base_gfn, ms->npages); | |
812 | } | |
813 | ||
814 | kvm_s390_sync_request_broadcast(kvm, KVM_REQ_START_MIGRATION); | |
815 | } | |
816 | return 0; | |
817 | } | |
818 | ||
819 | /* | |
820 | * Must be called with kvm->lock to avoid races with ourselves and | |
821 | * kvm_s390_vm_start_migration. | |
822 | */ | |
823 | static int kvm_s390_vm_stop_migration(struct kvm *kvm) | |
824 | { | |
825 | struct kvm_s390_migration_state *mgs; | |
826 | ||
827 | /* migration mode already disabled */ | |
828 | if (!kvm->arch.migration_state) | |
829 | return 0; | |
830 | mgs = kvm->arch.migration_state; | |
831 | kvm->arch.migration_state = NULL; | |
832 | ||
833 | if (kvm->arch.use_cmma) { | |
834 | kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION); | |
835 | vfree(mgs->pgste_bitmap); | |
836 | } | |
837 | kfree(mgs); | |
838 | return 0; | |
839 | } | |
840 | ||
841 | static int kvm_s390_vm_set_migration(struct kvm *kvm, | |
842 | struct kvm_device_attr *attr) | |
843 | { | |
844 | int idx, res = -ENXIO; | |
845 | ||
846 | mutex_lock(&kvm->lock); | |
847 | switch (attr->attr) { | |
848 | case KVM_S390_VM_MIGRATION_START: | |
849 | idx = srcu_read_lock(&kvm->srcu); | |
850 | res = kvm_s390_vm_start_migration(kvm); | |
851 | srcu_read_unlock(&kvm->srcu, idx); | |
852 | break; | |
853 | case KVM_S390_VM_MIGRATION_STOP: | |
854 | res = kvm_s390_vm_stop_migration(kvm); | |
855 | break; | |
856 | default: | |
857 | break; | |
858 | } | |
859 | mutex_unlock(&kvm->lock); | |
860 | ||
861 | return res; | |
862 | } | |
863 | ||
864 | static int kvm_s390_vm_get_migration(struct kvm *kvm, | |
865 | struct kvm_device_attr *attr) | |
866 | { | |
867 | u64 mig = (kvm->arch.migration_state != NULL); | |
868 | ||
869 | if (attr->attr != KVM_S390_VM_MIGRATION_STATUS) | |
870 | return -ENXIO; | |
871 | ||
872 | if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig))) | |
873 | return -EFAULT; | |
874 | return 0; | |
875 | } | |
876 | ||
72f25020 JH |
877 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
878 | { | |
879 | u8 gtod_high; | |
880 | ||
881 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
882 | sizeof(gtod_high))) | |
883 | return -EFAULT; | |
884 | ||
885 | if (gtod_high != 0) | |
886 | return -EINVAL; | |
58c383c6 | 887 | VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
888 | |
889 | return 0; | |
890 | } | |
891 | ||
892 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
893 | { | |
5a3d883a | 894 | u64 gtod; |
72f25020 JH |
895 | |
896 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
897 | return -EFAULT; | |
898 | ||
25ed1675 | 899 | kvm_s390_set_tod_clock(kvm, gtod); |
58c383c6 | 900 | VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod); |
72f25020 JH |
901 | return 0; |
902 | } | |
903 | ||
904 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
905 | { | |
906 | int ret; | |
907 | ||
908 | if (attr->flags) | |
909 | return -EINVAL; | |
910 | ||
911 | switch (attr->attr) { | |
912 | case KVM_S390_VM_TOD_HIGH: | |
913 | ret = kvm_s390_set_tod_high(kvm, attr); | |
914 | break; | |
915 | case KVM_S390_VM_TOD_LOW: | |
916 | ret = kvm_s390_set_tod_low(kvm, attr); | |
917 | break; | |
918 | default: | |
919 | ret = -ENXIO; | |
920 | break; | |
921 | } | |
922 | return ret; | |
923 | } | |
924 | ||
925 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
926 | { | |
927 | u8 gtod_high = 0; | |
928 | ||
929 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
930 | sizeof(gtod_high))) | |
931 | return -EFAULT; | |
58c383c6 | 932 | VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
933 | |
934 | return 0; | |
935 | } | |
936 | ||
937 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
938 | { | |
5a3d883a | 939 | u64 gtod; |
72f25020 | 940 | |
60417fcc | 941 | gtod = kvm_s390_get_tod_clock_fast(kvm); |
72f25020 JH |
942 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
943 | return -EFAULT; | |
58c383c6 | 944 | VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
72f25020 JH |
945 | |
946 | return 0; | |
947 | } | |
948 | ||
949 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
950 | { | |
951 | int ret; | |
952 | ||
953 | if (attr->flags) | |
954 | return -EINVAL; | |
955 | ||
956 | switch (attr->attr) { | |
957 | case KVM_S390_VM_TOD_HIGH: | |
958 | ret = kvm_s390_get_tod_high(kvm, attr); | |
959 | break; | |
960 | case KVM_S390_VM_TOD_LOW: | |
961 | ret = kvm_s390_get_tod_low(kvm, attr); | |
962 | break; | |
963 | default: | |
964 | ret = -ENXIO; | |
965 | break; | |
966 | } | |
967 | return ret; | |
968 | } | |
969 | ||
658b6eda MM |
970 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
971 | { | |
972 | struct kvm_s390_vm_cpu_processor *proc; | |
053dd230 | 973 | u16 lowest_ibc, unblocked_ibc; |
658b6eda MM |
974 | int ret = 0; |
975 | ||
976 | mutex_lock(&kvm->lock); | |
a03825bb | 977 | if (kvm->created_vcpus) { |
658b6eda MM |
978 | ret = -EBUSY; |
979 | goto out; | |
980 | } | |
981 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
982 | if (!proc) { | |
983 | ret = -ENOMEM; | |
984 | goto out; | |
985 | } | |
986 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
987 | sizeof(*proc))) { | |
9bb0ec09 | 988 | kvm->arch.model.cpuid = proc->cpuid; |
053dd230 DH |
989 | lowest_ibc = sclp.ibc >> 16 & 0xfff; |
990 | unblocked_ibc = sclp.ibc & 0xfff; | |
0487c44d | 991 | if (lowest_ibc && proc->ibc) { |
053dd230 DH |
992 | if (proc->ibc > unblocked_ibc) |
993 | kvm->arch.model.ibc = unblocked_ibc; | |
994 | else if (proc->ibc < lowest_ibc) | |
995 | kvm->arch.model.ibc = lowest_ibc; | |
996 | else | |
997 | kvm->arch.model.ibc = proc->ibc; | |
998 | } | |
c54f0d6a | 999 | memcpy(kvm->arch.model.fac_list, proc->fac_list, |
658b6eda | 1000 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
a8c39dd7 CB |
1001 | VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx", |
1002 | kvm->arch.model.ibc, | |
1003 | kvm->arch.model.cpuid); | |
1004 | VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx", | |
1005 | kvm->arch.model.fac_list[0], | |
1006 | kvm->arch.model.fac_list[1], | |
1007 | kvm->arch.model.fac_list[2]); | |
658b6eda MM |
1008 | } else |
1009 | ret = -EFAULT; | |
1010 | kfree(proc); | |
1011 | out: | |
1012 | mutex_unlock(&kvm->lock); | |
1013 | return ret; | |
1014 | } | |
1015 | ||
15c9705f DH |
1016 | static int kvm_s390_set_processor_feat(struct kvm *kvm, |
1017 | struct kvm_device_attr *attr) | |
1018 | { | |
1019 | struct kvm_s390_vm_cpu_feat data; | |
1020 | int ret = -EBUSY; | |
1021 | ||
1022 | if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data))) | |
1023 | return -EFAULT; | |
1024 | if (!bitmap_subset((unsigned long *) data.feat, | |
1025 | kvm_s390_available_cpu_feat, | |
1026 | KVM_S390_VM_CPU_FEAT_NR_BITS)) | |
1027 | return -EINVAL; | |
1028 | ||
1029 | mutex_lock(&kvm->lock); | |
1030 | if (!atomic_read(&kvm->online_vcpus)) { | |
1031 | bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat, | |
1032 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
1033 | ret = 0; | |
1034 | } | |
1035 | mutex_unlock(&kvm->lock); | |
1036 | return ret; | |
1037 | } | |
1038 | ||
0a763c78 DH |
1039 | static int kvm_s390_set_processor_subfunc(struct kvm *kvm, |
1040 | struct kvm_device_attr *attr) | |
1041 | { | |
1042 | /* | |
1043 | * Once supported by kernel + hw, we have to store the subfunctions | |
1044 | * in kvm->arch and remember that user space configured them. | |
1045 | */ | |
1046 | return -ENXIO; | |
1047 | } | |
1048 | ||
658b6eda MM |
1049 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
1050 | { | |
1051 | int ret = -ENXIO; | |
1052 | ||
1053 | switch (attr->attr) { | |
1054 | case KVM_S390_VM_CPU_PROCESSOR: | |
1055 | ret = kvm_s390_set_processor(kvm, attr); | |
1056 | break; | |
15c9705f DH |
1057 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
1058 | ret = kvm_s390_set_processor_feat(kvm, attr); | |
1059 | break; | |
0a763c78 DH |
1060 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
1061 | ret = kvm_s390_set_processor_subfunc(kvm, attr); | |
1062 | break; | |
658b6eda MM |
1063 | } |
1064 | return ret; | |
1065 | } | |
1066 | ||
1067 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
1068 | { | |
1069 | struct kvm_s390_vm_cpu_processor *proc; | |
1070 | int ret = 0; | |
1071 | ||
1072 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
1073 | if (!proc) { | |
1074 | ret = -ENOMEM; | |
1075 | goto out; | |
1076 | } | |
9bb0ec09 | 1077 | proc->cpuid = kvm->arch.model.cpuid; |
658b6eda | 1078 | proc->ibc = kvm->arch.model.ibc; |
c54f0d6a DH |
1079 | memcpy(&proc->fac_list, kvm->arch.model.fac_list, |
1080 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
a8c39dd7 CB |
1081 | VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx", |
1082 | kvm->arch.model.ibc, | |
1083 | kvm->arch.model.cpuid); | |
1084 | VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx", | |
1085 | kvm->arch.model.fac_list[0], | |
1086 | kvm->arch.model.fac_list[1], | |
1087 | kvm->arch.model.fac_list[2]); | |
658b6eda MM |
1088 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
1089 | ret = -EFAULT; | |
1090 | kfree(proc); | |
1091 | out: | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
1096 | { | |
1097 | struct kvm_s390_vm_cpu_machine *mach; | |
1098 | int ret = 0; | |
1099 | ||
1100 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
1101 | if (!mach) { | |
1102 | ret = -ENOMEM; | |
1103 | goto out; | |
1104 | } | |
1105 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 1106 | mach->ibc = sclp.ibc; |
c54f0d6a | 1107 | memcpy(&mach->fac_mask, kvm->arch.model.fac_mask, |
981467c9 | 1108 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda | 1109 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
04478197 | 1110 | sizeof(S390_lowcore.stfle_fac_list)); |
a8c39dd7 CB |
1111 | VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx", |
1112 | kvm->arch.model.ibc, | |
1113 | kvm->arch.model.cpuid); | |
1114 | VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx", | |
1115 | mach->fac_mask[0], | |
1116 | mach->fac_mask[1], | |
1117 | mach->fac_mask[2]); | |
1118 | VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx", | |
1119 | mach->fac_list[0], | |
1120 | mach->fac_list[1], | |
1121 | mach->fac_list[2]); | |
658b6eda MM |
1122 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
1123 | ret = -EFAULT; | |
1124 | kfree(mach); | |
1125 | out: | |
1126 | return ret; | |
1127 | } | |
1128 | ||
15c9705f DH |
1129 | static int kvm_s390_get_processor_feat(struct kvm *kvm, |
1130 | struct kvm_device_attr *attr) | |
1131 | { | |
1132 | struct kvm_s390_vm_cpu_feat data; | |
1133 | ||
1134 | bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat, | |
1135 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
1136 | if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) | |
1137 | return -EFAULT; | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | static int kvm_s390_get_machine_feat(struct kvm *kvm, | |
1142 | struct kvm_device_attr *attr) | |
1143 | { | |
1144 | struct kvm_s390_vm_cpu_feat data; | |
1145 | ||
1146 | bitmap_copy((unsigned long *) data.feat, | |
1147 | kvm_s390_available_cpu_feat, | |
1148 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
1149 | if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) | |
1150 | return -EFAULT; | |
1151 | return 0; | |
1152 | } | |
1153 | ||
0a763c78 DH |
1154 | static int kvm_s390_get_processor_subfunc(struct kvm *kvm, |
1155 | struct kvm_device_attr *attr) | |
1156 | { | |
1157 | /* | |
1158 | * Once we can actually configure subfunctions (kernel + hw support), | |
1159 | * we have to check if they were already set by user space, if so copy | |
1160 | * them from kvm->arch. | |
1161 | */ | |
1162 | return -ENXIO; | |
1163 | } | |
1164 | ||
1165 | static int kvm_s390_get_machine_subfunc(struct kvm *kvm, | |
1166 | struct kvm_device_attr *attr) | |
1167 | { | |
1168 | if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc, | |
1169 | sizeof(struct kvm_s390_vm_cpu_subfunc))) | |
1170 | return -EFAULT; | |
1171 | return 0; | |
1172 | } | |
658b6eda MM |
1173 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
1174 | { | |
1175 | int ret = -ENXIO; | |
1176 | ||
1177 | switch (attr->attr) { | |
1178 | case KVM_S390_VM_CPU_PROCESSOR: | |
1179 | ret = kvm_s390_get_processor(kvm, attr); | |
1180 | break; | |
1181 | case KVM_S390_VM_CPU_MACHINE: | |
1182 | ret = kvm_s390_get_machine(kvm, attr); | |
1183 | break; | |
15c9705f DH |
1184 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
1185 | ret = kvm_s390_get_processor_feat(kvm, attr); | |
1186 | break; | |
1187 | case KVM_S390_VM_CPU_MACHINE_FEAT: | |
1188 | ret = kvm_s390_get_machine_feat(kvm, attr); | |
1189 | break; | |
0a763c78 DH |
1190 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
1191 | ret = kvm_s390_get_processor_subfunc(kvm, attr); | |
1192 | break; | |
1193 | case KVM_S390_VM_CPU_MACHINE_SUBFUNC: | |
1194 | ret = kvm_s390_get_machine_subfunc(kvm, attr); | |
1195 | break; | |
658b6eda MM |
1196 | } |
1197 | return ret; | |
1198 | } | |
1199 | ||
f2061656 DD |
1200 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
1201 | { | |
1202 | int ret; | |
1203 | ||
1204 | switch (attr->group) { | |
4f718eab | 1205 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 1206 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 1207 | break; |
72f25020 JH |
1208 | case KVM_S390_VM_TOD: |
1209 | ret = kvm_s390_set_tod(kvm, attr); | |
1210 | break; | |
658b6eda MM |
1211 | case KVM_S390_VM_CPU_MODEL: |
1212 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
1213 | break; | |
a374e892 TK |
1214 | case KVM_S390_VM_CRYPTO: |
1215 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
1216 | break; | |
190df4a2 CI |
1217 | case KVM_S390_VM_MIGRATION: |
1218 | ret = kvm_s390_vm_set_migration(kvm, attr); | |
1219 | break; | |
f2061656 DD |
1220 | default: |
1221 | ret = -ENXIO; | |
1222 | break; | |
1223 | } | |
1224 | ||
1225 | return ret; | |
1226 | } | |
1227 | ||
1228 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
1229 | { | |
8c0a7ce6 DD |
1230 | int ret; |
1231 | ||
1232 | switch (attr->group) { | |
1233 | case KVM_S390_VM_MEM_CTRL: | |
1234 | ret = kvm_s390_get_mem_control(kvm, attr); | |
1235 | break; | |
72f25020 JH |
1236 | case KVM_S390_VM_TOD: |
1237 | ret = kvm_s390_get_tod(kvm, attr); | |
1238 | break; | |
658b6eda MM |
1239 | case KVM_S390_VM_CPU_MODEL: |
1240 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
1241 | break; | |
190df4a2 CI |
1242 | case KVM_S390_VM_MIGRATION: |
1243 | ret = kvm_s390_vm_get_migration(kvm, attr); | |
1244 | break; | |
8c0a7ce6 DD |
1245 | default: |
1246 | ret = -ENXIO; | |
1247 | break; | |
1248 | } | |
1249 | ||
1250 | return ret; | |
f2061656 DD |
1251 | } |
1252 | ||
1253 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
1254 | { | |
1255 | int ret; | |
1256 | ||
1257 | switch (attr->group) { | |
4f718eab DD |
1258 | case KVM_S390_VM_MEM_CTRL: |
1259 | switch (attr->attr) { | |
1260 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
1261 | case KVM_S390_VM_MEM_CLR_CMMA: | |
f9cbd9b0 DH |
1262 | ret = sclp.has_cmma ? 0 : -ENXIO; |
1263 | break; | |
8c0a7ce6 | 1264 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
1265 | ret = 0; |
1266 | break; | |
1267 | default: | |
1268 | ret = -ENXIO; | |
1269 | break; | |
1270 | } | |
1271 | break; | |
72f25020 JH |
1272 | case KVM_S390_VM_TOD: |
1273 | switch (attr->attr) { | |
1274 | case KVM_S390_VM_TOD_LOW: | |
1275 | case KVM_S390_VM_TOD_HIGH: | |
1276 | ret = 0; | |
1277 | break; | |
1278 | default: | |
1279 | ret = -ENXIO; | |
1280 | break; | |
1281 | } | |
1282 | break; | |
658b6eda MM |
1283 | case KVM_S390_VM_CPU_MODEL: |
1284 | switch (attr->attr) { | |
1285 | case KVM_S390_VM_CPU_PROCESSOR: | |
1286 | case KVM_S390_VM_CPU_MACHINE: | |
15c9705f DH |
1287 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
1288 | case KVM_S390_VM_CPU_MACHINE_FEAT: | |
0a763c78 | 1289 | case KVM_S390_VM_CPU_MACHINE_SUBFUNC: |
658b6eda MM |
1290 | ret = 0; |
1291 | break; | |
0a763c78 DH |
1292 | /* configuring subfunctions is not supported yet */ |
1293 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: | |
658b6eda MM |
1294 | default: |
1295 | ret = -ENXIO; | |
1296 | break; | |
1297 | } | |
1298 | break; | |
a374e892 TK |
1299 | case KVM_S390_VM_CRYPTO: |
1300 | switch (attr->attr) { | |
1301 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
1302 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
1303 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
1304 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
1305 | ret = 0; | |
1306 | break; | |
1307 | default: | |
1308 | ret = -ENXIO; | |
1309 | break; | |
1310 | } | |
1311 | break; | |
190df4a2 CI |
1312 | case KVM_S390_VM_MIGRATION: |
1313 | ret = 0; | |
1314 | break; | |
f2061656 DD |
1315 | default: |
1316 | ret = -ENXIO; | |
1317 | break; | |
1318 | } | |
1319 | ||
1320 | return ret; | |
1321 | } | |
1322 | ||
30ee2a98 JH |
1323 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
1324 | { | |
1325 | uint8_t *keys; | |
1326 | uint64_t hva; | |
4f899147 | 1327 | int srcu_idx, i, r = 0; |
30ee2a98 JH |
1328 | |
1329 | if (args->flags != 0) | |
1330 | return -EINVAL; | |
1331 | ||
1332 | /* Is this guest using storage keys? */ | |
1333 | if (!mm_use_skey(current->mm)) | |
1334 | return KVM_S390_GET_SKEYS_NONE; | |
1335 | ||
1336 | /* Enforce sane limit on memory allocation */ | |
1337 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
1338 | return -EINVAL; | |
1339 | ||
752ade68 | 1340 | keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL); |
30ee2a98 JH |
1341 | if (!keys) |
1342 | return -ENOMEM; | |
1343 | ||
d3ed1cee | 1344 | down_read(¤t->mm->mmap_sem); |
4f899147 | 1345 | srcu_idx = srcu_read_lock(&kvm->srcu); |
30ee2a98 JH |
1346 | for (i = 0; i < args->count; i++) { |
1347 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1348 | if (kvm_is_error_hva(hva)) { | |
1349 | r = -EFAULT; | |
d3ed1cee | 1350 | break; |
30ee2a98 JH |
1351 | } |
1352 | ||
154c8c19 DH |
1353 | r = get_guest_storage_key(current->mm, hva, &keys[i]); |
1354 | if (r) | |
d3ed1cee | 1355 | break; |
30ee2a98 | 1356 | } |
4f899147 | 1357 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
d3ed1cee MS |
1358 | up_read(¤t->mm->mmap_sem); |
1359 | ||
1360 | if (!r) { | |
1361 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
1362 | sizeof(uint8_t) * args->count); | |
1363 | if (r) | |
1364 | r = -EFAULT; | |
30ee2a98 JH |
1365 | } |
1366 | ||
30ee2a98 JH |
1367 | kvfree(keys); |
1368 | return r; | |
1369 | } | |
1370 | ||
1371 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
1372 | { | |
1373 | uint8_t *keys; | |
1374 | uint64_t hva; | |
4f899147 | 1375 | int srcu_idx, i, r = 0; |
30ee2a98 JH |
1376 | |
1377 | if (args->flags != 0) | |
1378 | return -EINVAL; | |
1379 | ||
1380 | /* Enforce sane limit on memory allocation */ | |
1381 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
1382 | return -EINVAL; | |
1383 | ||
752ade68 | 1384 | keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL); |
30ee2a98 JH |
1385 | if (!keys) |
1386 | return -ENOMEM; | |
1387 | ||
1388 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
1389 | sizeof(uint8_t) * args->count); | |
1390 | if (r) { | |
1391 | r = -EFAULT; | |
1392 | goto out; | |
1393 | } | |
1394 | ||
1395 | /* Enable storage key handling for the guest */ | |
14d4a425 DD |
1396 | r = s390_enable_skey(); |
1397 | if (r) | |
1398 | goto out; | |
30ee2a98 | 1399 | |
d3ed1cee | 1400 | down_read(¤t->mm->mmap_sem); |
4f899147 | 1401 | srcu_idx = srcu_read_lock(&kvm->srcu); |
30ee2a98 JH |
1402 | for (i = 0; i < args->count; i++) { |
1403 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1404 | if (kvm_is_error_hva(hva)) { | |
1405 | r = -EFAULT; | |
d3ed1cee | 1406 | break; |
30ee2a98 JH |
1407 | } |
1408 | ||
1409 | /* Lowest order bit is reserved */ | |
1410 | if (keys[i] & 0x01) { | |
1411 | r = -EINVAL; | |
d3ed1cee | 1412 | break; |
30ee2a98 JH |
1413 | } |
1414 | ||
fe69eabf | 1415 | r = set_guest_storage_key(current->mm, hva, keys[i], 0); |
30ee2a98 | 1416 | if (r) |
d3ed1cee | 1417 | break; |
30ee2a98 | 1418 | } |
4f899147 | 1419 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
d3ed1cee | 1420 | up_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1421 | out: |
1422 | kvfree(keys); | |
1423 | return r; | |
1424 | } | |
1425 | ||
4036e387 CI |
1426 | /* |
1427 | * Base address and length must be sent at the start of each block, therefore | |
1428 | * it's cheaper to send some clean data, as long as it's less than the size of | |
1429 | * two longs. | |
1430 | */ | |
1431 | #define KVM_S390_MAX_BIT_DISTANCE (2 * sizeof(void *)) | |
1432 | /* for consistency */ | |
1433 | #define KVM_S390_CMMA_SIZE_MAX ((u32)KVM_S390_SKEYS_MAX) | |
1434 | ||
1435 | /* | |
1436 | * This function searches for the next page with dirty CMMA attributes, and | |
1437 | * saves the attributes in the buffer up to either the end of the buffer or | |
1438 | * until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found; | |
1439 | * no trailing clean bytes are saved. | |
1440 | * In case no dirty bits were found, or if CMMA was not enabled or used, the | |
1441 | * output buffer will indicate 0 as length. | |
1442 | */ | |
1443 | static int kvm_s390_get_cmma_bits(struct kvm *kvm, | |
1444 | struct kvm_s390_cmma_log *args) | |
1445 | { | |
1446 | struct kvm_s390_migration_state *s = kvm->arch.migration_state; | |
1447 | unsigned long bufsize, hva, pgstev, i, next, cur; | |
1448 | int srcu_idx, peek, r = 0, rr; | |
1449 | u8 *res; | |
1450 | ||
1451 | cur = args->start_gfn; | |
1452 | i = next = pgstev = 0; | |
1453 | ||
1454 | if (unlikely(!kvm->arch.use_cmma)) | |
1455 | return -ENXIO; | |
1456 | /* Invalid/unsupported flags were specified */ | |
1457 | if (args->flags & ~KVM_S390_CMMA_PEEK) | |
1458 | return -EINVAL; | |
1459 | /* Migration mode query, and we are not doing a migration */ | |
1460 | peek = !!(args->flags & KVM_S390_CMMA_PEEK); | |
1461 | if (!peek && !s) | |
1462 | return -EINVAL; | |
1463 | /* CMMA is disabled or was not used, or the buffer has length zero */ | |
1464 | bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX); | |
1465 | if (!bufsize || !kvm->mm->context.use_cmma) { | |
1466 | memset(args, 0, sizeof(*args)); | |
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | if (!peek) { | |
1471 | /* We are not peeking, and there are no dirty pages */ | |
1472 | if (!atomic64_read(&s->dirty_pages)) { | |
1473 | memset(args, 0, sizeof(*args)); | |
1474 | return 0; | |
1475 | } | |
1476 | cur = find_next_bit(s->pgste_bitmap, s->bitmap_size, | |
1477 | args->start_gfn); | |
1478 | if (cur >= s->bitmap_size) /* nothing found, loop back */ | |
1479 | cur = find_next_bit(s->pgste_bitmap, s->bitmap_size, 0); | |
1480 | if (cur >= s->bitmap_size) { /* again! (very unlikely) */ | |
1481 | memset(args, 0, sizeof(*args)); | |
1482 | return 0; | |
1483 | } | |
1484 | next = find_next_bit(s->pgste_bitmap, s->bitmap_size, cur + 1); | |
1485 | } | |
1486 | ||
1487 | res = vmalloc(bufsize); | |
1488 | if (!res) | |
1489 | return -ENOMEM; | |
1490 | ||
1491 | args->start_gfn = cur; | |
1492 | ||
1493 | down_read(&kvm->mm->mmap_sem); | |
1494 | srcu_idx = srcu_read_lock(&kvm->srcu); | |
1495 | while (i < bufsize) { | |
1496 | hva = gfn_to_hva(kvm, cur); | |
1497 | if (kvm_is_error_hva(hva)) { | |
1498 | r = -EFAULT; | |
1499 | break; | |
1500 | } | |
1501 | /* decrement only if we actually flipped the bit to 0 */ | |
1502 | if (!peek && test_and_clear_bit(cur, s->pgste_bitmap)) | |
1503 | atomic64_dec(&s->dirty_pages); | |
1504 | r = get_pgste(kvm->mm, hva, &pgstev); | |
1505 | if (r < 0) | |
1506 | pgstev = 0; | |
1507 | /* save the value */ | |
1508 | res[i++] = (pgstev >> 24) & 0x3; | |
1509 | /* | |
1510 | * if the next bit is too far away, stop. | |
1511 | * if we reached the previous "next", find the next one | |
1512 | */ | |
1513 | if (!peek) { | |
1514 | if (next > cur + KVM_S390_MAX_BIT_DISTANCE) | |
1515 | break; | |
1516 | if (cur == next) | |
1517 | next = find_next_bit(s->pgste_bitmap, | |
1518 | s->bitmap_size, cur + 1); | |
1519 | /* reached the end of the bitmap or of the buffer, stop */ | |
1520 | if ((next >= s->bitmap_size) || | |
1521 | (next >= args->start_gfn + bufsize)) | |
1522 | break; | |
1523 | } | |
1524 | cur++; | |
1525 | } | |
1526 | srcu_read_unlock(&kvm->srcu, srcu_idx); | |
1527 | up_read(&kvm->mm->mmap_sem); | |
1528 | args->count = i; | |
1529 | args->remaining = s ? atomic64_read(&s->dirty_pages) : 0; | |
1530 | ||
1531 | rr = copy_to_user((void __user *)args->values, res, args->count); | |
1532 | if (rr) | |
1533 | r = -EFAULT; | |
1534 | ||
1535 | vfree(res); | |
1536 | return r; | |
1537 | } | |
1538 | ||
1539 | /* | |
1540 | * This function sets the CMMA attributes for the given pages. If the input | |
1541 | * buffer has zero length, no action is taken, otherwise the attributes are | |
1542 | * set and the mm->context.use_cmma flag is set. | |
1543 | */ | |
1544 | static int kvm_s390_set_cmma_bits(struct kvm *kvm, | |
1545 | const struct kvm_s390_cmma_log *args) | |
1546 | { | |
1547 | unsigned long hva, mask, pgstev, i; | |
1548 | uint8_t *bits; | |
1549 | int srcu_idx, r = 0; | |
1550 | ||
1551 | mask = args->mask; | |
1552 | ||
1553 | if (!kvm->arch.use_cmma) | |
1554 | return -ENXIO; | |
1555 | /* invalid/unsupported flags */ | |
1556 | if (args->flags != 0) | |
1557 | return -EINVAL; | |
1558 | /* Enforce sane limit on memory allocation */ | |
1559 | if (args->count > KVM_S390_CMMA_SIZE_MAX) | |
1560 | return -EINVAL; | |
1561 | /* Nothing to do */ | |
1562 | if (args->count == 0) | |
1563 | return 0; | |
1564 | ||
1565 | bits = vmalloc(sizeof(*bits) * args->count); | |
1566 | if (!bits) | |
1567 | return -ENOMEM; | |
1568 | ||
1569 | r = copy_from_user(bits, (void __user *)args->values, args->count); | |
1570 | if (r) { | |
1571 | r = -EFAULT; | |
1572 | goto out; | |
1573 | } | |
1574 | ||
1575 | down_read(&kvm->mm->mmap_sem); | |
1576 | srcu_idx = srcu_read_lock(&kvm->srcu); | |
1577 | for (i = 0; i < args->count; i++) { | |
1578 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1579 | if (kvm_is_error_hva(hva)) { | |
1580 | r = -EFAULT; | |
1581 | break; | |
1582 | } | |
1583 | ||
1584 | pgstev = bits[i]; | |
1585 | pgstev = pgstev << 24; | |
1586 | mask &= _PGSTE_GPS_USAGE_MASK; | |
1587 | set_pgste_bits(kvm->mm, hva, mask, pgstev); | |
1588 | } | |
1589 | srcu_read_unlock(&kvm->srcu, srcu_idx); | |
1590 | up_read(&kvm->mm->mmap_sem); | |
1591 | ||
1592 | if (!kvm->mm->context.use_cmma) { | |
1593 | down_write(&kvm->mm->mmap_sem); | |
1594 | kvm->mm->context.use_cmma = 1; | |
1595 | up_write(&kvm->mm->mmap_sem); | |
1596 | } | |
1597 | out: | |
1598 | vfree(bits); | |
1599 | return r; | |
1600 | } | |
1601 | ||
b0c632db HC |
1602 | long kvm_arch_vm_ioctl(struct file *filp, |
1603 | unsigned int ioctl, unsigned long arg) | |
1604 | { | |
1605 | struct kvm *kvm = filp->private_data; | |
1606 | void __user *argp = (void __user *)arg; | |
f2061656 | 1607 | struct kvm_device_attr attr; |
b0c632db HC |
1608 | int r; |
1609 | ||
1610 | switch (ioctl) { | |
ba5c1e9b CO |
1611 | case KVM_S390_INTERRUPT: { |
1612 | struct kvm_s390_interrupt s390int; | |
1613 | ||
1614 | r = -EFAULT; | |
1615 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
1616 | break; | |
1617 | r = kvm_s390_inject_vm(kvm, &s390int); | |
1618 | break; | |
1619 | } | |
d938dc55 CH |
1620 | case KVM_ENABLE_CAP: { |
1621 | struct kvm_enable_cap cap; | |
1622 | r = -EFAULT; | |
1623 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1624 | break; | |
1625 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
1626 | break; | |
1627 | } | |
84223598 CH |
1628 | case KVM_CREATE_IRQCHIP: { |
1629 | struct kvm_irq_routing_entry routing; | |
1630 | ||
1631 | r = -EINVAL; | |
1632 | if (kvm->arch.use_irqchip) { | |
1633 | /* Set up dummy routing. */ | |
1634 | memset(&routing, 0, sizeof(routing)); | |
152b2839 | 1635 | r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
84223598 CH |
1636 | } |
1637 | break; | |
1638 | } | |
f2061656 DD |
1639 | case KVM_SET_DEVICE_ATTR: { |
1640 | r = -EFAULT; | |
1641 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1642 | break; | |
1643 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
1644 | break; | |
1645 | } | |
1646 | case KVM_GET_DEVICE_ATTR: { | |
1647 | r = -EFAULT; | |
1648 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1649 | break; | |
1650 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
1651 | break; | |
1652 | } | |
1653 | case KVM_HAS_DEVICE_ATTR: { | |
1654 | r = -EFAULT; | |
1655 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1656 | break; | |
1657 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
1658 | break; | |
1659 | } | |
30ee2a98 JH |
1660 | case KVM_S390_GET_SKEYS: { |
1661 | struct kvm_s390_skeys args; | |
1662 | ||
1663 | r = -EFAULT; | |
1664 | if (copy_from_user(&args, argp, | |
1665 | sizeof(struct kvm_s390_skeys))) | |
1666 | break; | |
1667 | r = kvm_s390_get_skeys(kvm, &args); | |
1668 | break; | |
1669 | } | |
1670 | case KVM_S390_SET_SKEYS: { | |
1671 | struct kvm_s390_skeys args; | |
1672 | ||
1673 | r = -EFAULT; | |
1674 | if (copy_from_user(&args, argp, | |
1675 | sizeof(struct kvm_s390_skeys))) | |
1676 | break; | |
1677 | r = kvm_s390_set_skeys(kvm, &args); | |
1678 | break; | |
1679 | } | |
4036e387 CI |
1680 | case KVM_S390_GET_CMMA_BITS: { |
1681 | struct kvm_s390_cmma_log args; | |
1682 | ||
1683 | r = -EFAULT; | |
1684 | if (copy_from_user(&args, argp, sizeof(args))) | |
1685 | break; | |
1686 | r = kvm_s390_get_cmma_bits(kvm, &args); | |
1687 | if (!r) { | |
1688 | r = copy_to_user(argp, &args, sizeof(args)); | |
1689 | if (r) | |
1690 | r = -EFAULT; | |
1691 | } | |
1692 | break; | |
1693 | } | |
1694 | case KVM_S390_SET_CMMA_BITS: { | |
1695 | struct kvm_s390_cmma_log args; | |
1696 | ||
1697 | r = -EFAULT; | |
1698 | if (copy_from_user(&args, argp, sizeof(args))) | |
1699 | break; | |
1700 | r = kvm_s390_set_cmma_bits(kvm, &args); | |
1701 | break; | |
1702 | } | |
b0c632db | 1703 | default: |
367e1319 | 1704 | r = -ENOTTY; |
b0c632db HC |
1705 | } |
1706 | ||
1707 | return r; | |
1708 | } | |
1709 | ||
45c9b47c TK |
1710 | static int kvm_s390_query_ap_config(u8 *config) |
1711 | { | |
1712 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 1713 | u32 cc = 0; |
45c9b47c | 1714 | |
86044c8c | 1715 | memset(config, 0, 128); |
45c9b47c TK |
1716 | asm volatile( |
1717 | "lgr 0,%1\n" | |
1718 | "lgr 2,%2\n" | |
1719 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 1720 | "0: ipm %0\n" |
45c9b47c | 1721 | "srl %0,28\n" |
86044c8c CB |
1722 | "1:\n" |
1723 | EX_TABLE(0b, 1b) | |
1724 | : "+r" (cc) | |
45c9b47c TK |
1725 | : "r" (fcn_code), "r" (config) |
1726 | : "cc", "0", "2", "memory" | |
1727 | ); | |
1728 | ||
1729 | return cc; | |
1730 | } | |
1731 | ||
1732 | static int kvm_s390_apxa_installed(void) | |
1733 | { | |
1734 | u8 config[128]; | |
1735 | int cc; | |
1736 | ||
a6aacc3f | 1737 | if (test_facility(12)) { |
45c9b47c TK |
1738 | cc = kvm_s390_query_ap_config(config); |
1739 | ||
1740 | if (cc) | |
1741 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
1742 | else | |
1743 | return config[0] & 0x40; | |
1744 | } | |
1745 | ||
1746 | return 0; | |
1747 | } | |
1748 | ||
1749 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
1750 | { | |
1751 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
1752 | ||
1753 | if (kvm_s390_apxa_installed()) | |
1754 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
1755 | else | |
1756 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
1757 | } | |
1758 | ||
9bb0ec09 | 1759 | static u64 kvm_s390_get_initial_cpuid(void) |
9d8d5786 | 1760 | { |
9bb0ec09 DH |
1761 | struct cpuid cpuid; |
1762 | ||
1763 | get_cpu_id(&cpuid); | |
1764 | cpuid.version = 0xff; | |
1765 | return *((u64 *) &cpuid); | |
9d8d5786 MM |
1766 | } |
1767 | ||
c54f0d6a | 1768 | static void kvm_s390_crypto_init(struct kvm *kvm) |
5102ee87 | 1769 | { |
9d8d5786 | 1770 | if (!test_kvm_facility(kvm, 76)) |
c54f0d6a | 1771 | return; |
5102ee87 | 1772 | |
c54f0d6a | 1773 | kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; |
45c9b47c | 1774 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1775 | |
ed6f76b4 TK |
1776 | /* Enable AES/DEA protected key functions by default */ |
1777 | kvm->arch.crypto.aes_kw = 1; | |
1778 | kvm->arch.crypto.dea_kw = 1; | |
1779 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1780 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1781 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1782 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
5102ee87 TK |
1783 | } |
1784 | ||
7d43bafc ED |
1785 | static void sca_dispose(struct kvm *kvm) |
1786 | { | |
1787 | if (kvm->arch.use_esca) | |
5e044315 | 1788 | free_pages_exact(kvm->arch.sca, sizeof(struct esca_block)); |
7d43bafc ED |
1789 | else |
1790 | free_page((unsigned long)(kvm->arch.sca)); | |
1791 | kvm->arch.sca = NULL; | |
1792 | } | |
1793 | ||
e08b9637 | 1794 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1795 | { |
76a6dd72 | 1796 | gfp_t alloc_flags = GFP_KERNEL; |
9d8d5786 | 1797 | int i, rc; |
b0c632db | 1798 | char debug_name[16]; |
f6c137ff | 1799 | static unsigned long sca_offset; |
b0c632db | 1800 | |
e08b9637 CO |
1801 | rc = -EINVAL; |
1802 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1803 | if (type & ~KVM_VM_S390_UCONTROL) | |
1804 | goto out_err; | |
1805 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1806 | goto out_err; | |
1807 | #else | |
1808 | if (type) | |
1809 | goto out_err; | |
1810 | #endif | |
1811 | ||
b0c632db HC |
1812 | rc = s390_enable_sie(); |
1813 | if (rc) | |
d89f5eff | 1814 | goto out_err; |
b0c632db | 1815 | |
b290411a CO |
1816 | rc = -ENOMEM; |
1817 | ||
7d0a5e62 JF |
1818 | ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500); |
1819 | ||
7d43bafc | 1820 | kvm->arch.use_esca = 0; /* start with basic SCA */ |
76a6dd72 DH |
1821 | if (!sclp.has_64bscao) |
1822 | alloc_flags |= GFP_DMA; | |
5e044315 | 1823 | rwlock_init(&kvm->arch.sca_lock); |
76a6dd72 | 1824 | kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags); |
b0c632db | 1825 | if (!kvm->arch.sca) |
d89f5eff | 1826 | goto out_err; |
f6c137ff | 1827 | spin_lock(&kvm_lock); |
c5c2c393 | 1828 | sca_offset += 16; |
bc784cce | 1829 | if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE) |
c5c2c393 | 1830 | sca_offset = 0; |
bc784cce ED |
1831 | kvm->arch.sca = (struct bsca_block *) |
1832 | ((char *) kvm->arch.sca + sca_offset); | |
f6c137ff | 1833 | spin_unlock(&kvm_lock); |
b0c632db HC |
1834 | |
1835 | sprintf(debug_name, "kvm-%u", current->pid); | |
1836 | ||
1cb9cf72 | 1837 | kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
b0c632db | 1838 | if (!kvm->arch.dbf) |
40f5b735 | 1839 | goto out_err; |
b0c632db | 1840 | |
c54f0d6a DH |
1841 | kvm->arch.sie_page2 = |
1842 | (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1843 | if (!kvm->arch.sie_page2) | |
40f5b735 | 1844 | goto out_err; |
9d8d5786 | 1845 | |
fb5bf93f | 1846 | /* Populate the facility mask initially. */ |
c54f0d6a | 1847 | memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list, |
04478197 | 1848 | sizeof(S390_lowcore.stfle_fac_list)); |
9d8d5786 MM |
1849 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1850 | if (i < kvm_s390_fac_list_mask_size()) | |
c54f0d6a | 1851 | kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1852 | else |
c54f0d6a | 1853 | kvm->arch.model.fac_mask[i] = 0UL; |
9d8d5786 MM |
1854 | } |
1855 | ||
981467c9 | 1856 | /* Populate the facility list initially. */ |
c54f0d6a DH |
1857 | kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list; |
1858 | memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask, | |
981467c9 MM |
1859 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
1860 | ||
95ca2cb5 JF |
1861 | set_kvm_facility(kvm->arch.model.fac_mask, 74); |
1862 | set_kvm_facility(kvm->arch.model.fac_list, 74); | |
1863 | ||
9bb0ec09 | 1864 | kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid(); |
37c5f6c8 | 1865 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1866 | |
c54f0d6a | 1867 | kvm_s390_crypto_init(kvm); |
5102ee87 | 1868 | |
51978393 FL |
1869 | mutex_init(&kvm->arch.float_int.ais_lock); |
1870 | kvm->arch.float_int.simm = 0; | |
1871 | kvm->arch.float_int.nimm = 0; | |
ba5c1e9b | 1872 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1873 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1874 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1875 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1876 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1877 | |
b0c632db | 1878 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
78f26131 | 1879 | VM_EVENT(kvm, 3, "vm created with type %lu", type); |
b0c632db | 1880 | |
e08b9637 CO |
1881 | if (type & KVM_VM_S390_UCONTROL) { |
1882 | kvm->arch.gmap = NULL; | |
a3a92c31 | 1883 | kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT; |
e08b9637 | 1884 | } else { |
32e6b236 | 1885 | if (sclp.hamax == U64_MAX) |
ee71d16d | 1886 | kvm->arch.mem_limit = TASK_SIZE_MAX; |
32e6b236 | 1887 | else |
ee71d16d | 1888 | kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX, |
32e6b236 | 1889 | sclp.hamax + 1); |
6ea427bb | 1890 | kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1); |
e08b9637 | 1891 | if (!kvm->arch.gmap) |
40f5b735 | 1892 | goto out_err; |
2c70fe44 | 1893 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1894 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1895 | } |
fa6b7fe9 CH |
1896 | |
1897 | kvm->arch.css_support = 0; | |
84223598 | 1898 | kvm->arch.use_irqchip = 0; |
72f25020 | 1899 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1900 | |
8ad35755 | 1901 | spin_lock_init(&kvm->arch.start_stop_lock); |
a3508fbe | 1902 | kvm_s390_vsie_init(kvm); |
8335713a | 1903 | KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid); |
8ad35755 | 1904 | |
d89f5eff | 1905 | return 0; |
40f5b735 | 1906 | out_err: |
c54f0d6a | 1907 | free_page((unsigned long)kvm->arch.sie_page2); |
598841ca | 1908 | debug_unregister(kvm->arch.dbf); |
7d43bafc | 1909 | sca_dispose(kvm); |
78f26131 | 1910 | KVM_EVENT(3, "creation of vm failed: %d", rc); |
d89f5eff | 1911 | return rc; |
b0c632db HC |
1912 | } |
1913 | ||
235539b4 LC |
1914 | bool kvm_arch_has_vcpu_debugfs(void) |
1915 | { | |
1916 | return false; | |
1917 | } | |
1918 | ||
1919 | int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) | |
1920 | { | |
1921 | return 0; | |
1922 | } | |
1923 | ||
d329c035 CB |
1924 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1925 | { | |
1926 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1927 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1928 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1929 | kvm_clear_async_pf_completion_queue(vcpu); |
bc784cce | 1930 | if (!kvm_is_ucontrol(vcpu->kvm)) |
a6e2f683 | 1931 | sca_del_vcpu(vcpu); |
27e0393f CO |
1932 | |
1933 | if (kvm_is_ucontrol(vcpu->kvm)) | |
6ea427bb | 1934 | gmap_remove(vcpu->arch.gmap); |
27e0393f | 1935 | |
e6db1d61 | 1936 | if (vcpu->kvm->arch.use_cmma) |
b31605c1 | 1937 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
d329c035 | 1938 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1939 | |
6692cef3 | 1940 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1941 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1942 | } |
1943 | ||
1944 | static void kvm_free_vcpus(struct kvm *kvm) | |
1945 | { | |
1946 | unsigned int i; | |
988a2cae | 1947 | struct kvm_vcpu *vcpu; |
d329c035 | 1948 | |
988a2cae GN |
1949 | kvm_for_each_vcpu(i, vcpu, kvm) |
1950 | kvm_arch_vcpu_destroy(vcpu); | |
1951 | ||
1952 | mutex_lock(&kvm->lock); | |
1953 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1954 | kvm->vcpus[i] = NULL; | |
1955 | ||
1956 | atomic_set(&kvm->online_vcpus, 0); | |
1957 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1958 | } |
1959 | ||
b0c632db HC |
1960 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1961 | { | |
d329c035 | 1962 | kvm_free_vcpus(kvm); |
7d43bafc | 1963 | sca_dispose(kvm); |
d329c035 | 1964 | debug_unregister(kvm->arch.dbf); |
c54f0d6a | 1965 | free_page((unsigned long)kvm->arch.sie_page2); |
27e0393f | 1966 | if (!kvm_is_ucontrol(kvm)) |
6ea427bb | 1967 | gmap_remove(kvm->arch.gmap); |
841b91c5 | 1968 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1969 | kvm_s390_clear_float_irqs(kvm); |
a3508fbe | 1970 | kvm_s390_vsie_destroy(kvm); |
190df4a2 CI |
1971 | if (kvm->arch.migration_state) { |
1972 | vfree(kvm->arch.migration_state->pgste_bitmap); | |
1973 | kfree(kvm->arch.migration_state); | |
1974 | } | |
8335713a | 1975 | KVM_EVENT(3, "vm 0x%pK destroyed", kvm); |
b0c632db HC |
1976 | } |
1977 | ||
1978 | /* Section: vcpu related */ | |
dafd032a DD |
1979 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1980 | { | |
6ea427bb | 1981 | vcpu->arch.gmap = gmap_create(current->mm, -1UL); |
dafd032a DD |
1982 | if (!vcpu->arch.gmap) |
1983 | return -ENOMEM; | |
1984 | vcpu->arch.gmap->private = vcpu->kvm; | |
1985 | ||
1986 | return 0; | |
1987 | } | |
1988 | ||
a6e2f683 ED |
1989 | static void sca_del_vcpu(struct kvm_vcpu *vcpu) |
1990 | { | |
a6940674 DH |
1991 | if (!kvm_s390_use_sca_entries()) |
1992 | return; | |
5e044315 | 1993 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
1994 | if (vcpu->kvm->arch.use_esca) { |
1995 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
a6e2f683 | 1996 | |
7d43bafc | 1997 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
10ce32d5 | 1998 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc ED |
1999 | } else { |
2000 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
2001 | ||
2002 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); | |
10ce32d5 | 2003 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc | 2004 | } |
5e044315 | 2005 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a6e2f683 ED |
2006 | } |
2007 | ||
eaa78f34 | 2008 | static void sca_add_vcpu(struct kvm_vcpu *vcpu) |
a6e2f683 | 2009 | { |
a6940674 DH |
2010 | if (!kvm_s390_use_sca_entries()) { |
2011 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
2012 | ||
2013 | /* we still need the basic sca for the ipte control */ | |
2014 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); | |
2015 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
2016 | } | |
eaa78f34 DH |
2017 | read_lock(&vcpu->kvm->arch.sca_lock); |
2018 | if (vcpu->kvm->arch.use_esca) { | |
2019 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
7d43bafc | 2020 | |
eaa78f34 | 2021 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
2022 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
2023 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU; | |
0c9d8683 | 2024 | vcpu->arch.sie_block->ecb2 |= ECB2_ESCA; |
eaa78f34 | 2025 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
7d43bafc | 2026 | } else { |
eaa78f34 | 2027 | struct bsca_block *sca = vcpu->kvm->arch.sca; |
a6e2f683 | 2028 | |
eaa78f34 | 2029 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
2030 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
2031 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
eaa78f34 | 2032 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); |
7d43bafc | 2033 | } |
eaa78f34 | 2034 | read_unlock(&vcpu->kvm->arch.sca_lock); |
5e044315 ED |
2035 | } |
2036 | ||
2037 | /* Basic SCA to Extended SCA data copy routines */ | |
2038 | static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s) | |
2039 | { | |
2040 | d->sda = s->sda; | |
2041 | d->sigp_ctrl.c = s->sigp_ctrl.c; | |
2042 | d->sigp_ctrl.scn = s->sigp_ctrl.scn; | |
2043 | } | |
2044 | ||
2045 | static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s) | |
2046 | { | |
2047 | int i; | |
2048 | ||
2049 | d->ipte_control = s->ipte_control; | |
2050 | d->mcn[0] = s->mcn; | |
2051 | for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++) | |
2052 | sca_copy_entry(&d->cpu[i], &s->cpu[i]); | |
2053 | } | |
2054 | ||
2055 | static int sca_switch_to_extended(struct kvm *kvm) | |
2056 | { | |
2057 | struct bsca_block *old_sca = kvm->arch.sca; | |
2058 | struct esca_block *new_sca; | |
2059 | struct kvm_vcpu *vcpu; | |
2060 | unsigned int vcpu_idx; | |
2061 | u32 scaol, scaoh; | |
2062 | ||
2063 | new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO); | |
2064 | if (!new_sca) | |
2065 | return -ENOMEM; | |
2066 | ||
2067 | scaoh = (u32)((u64)(new_sca) >> 32); | |
2068 | scaol = (u32)(u64)(new_sca) & ~0x3fU; | |
2069 | ||
2070 | kvm_s390_vcpu_block_all(kvm); | |
2071 | write_lock(&kvm->arch.sca_lock); | |
2072 | ||
2073 | sca_copy_b_to_e(new_sca, old_sca); | |
2074 | ||
2075 | kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) { | |
2076 | vcpu->arch.sie_block->scaoh = scaoh; | |
2077 | vcpu->arch.sie_block->scaol = scaol; | |
0c9d8683 | 2078 | vcpu->arch.sie_block->ecb2 |= ECB2_ESCA; |
5e044315 ED |
2079 | } |
2080 | kvm->arch.sca = new_sca; | |
2081 | kvm->arch.use_esca = 1; | |
2082 | ||
2083 | write_unlock(&kvm->arch.sca_lock); | |
2084 | kvm_s390_vcpu_unblock_all(kvm); | |
2085 | ||
2086 | free_page((unsigned long)old_sca); | |
2087 | ||
8335713a CB |
2088 | VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)", |
2089 | old_sca, kvm->arch.sca); | |
5e044315 | 2090 | return 0; |
a6e2f683 ED |
2091 | } |
2092 | ||
2093 | static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id) | |
2094 | { | |
5e044315 ED |
2095 | int rc; |
2096 | ||
a6940674 DH |
2097 | if (!kvm_s390_use_sca_entries()) { |
2098 | if (id < KVM_MAX_VCPUS) | |
2099 | return true; | |
2100 | return false; | |
2101 | } | |
5e044315 ED |
2102 | if (id < KVM_S390_BSCA_CPU_SLOTS) |
2103 | return true; | |
76a6dd72 | 2104 | if (!sclp.has_esca || !sclp.has_64bscao) |
5e044315 ED |
2105 | return false; |
2106 | ||
2107 | mutex_lock(&kvm->lock); | |
2108 | rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm); | |
2109 | mutex_unlock(&kvm->lock); | |
2110 | ||
2111 | return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS; | |
a6e2f683 ED |
2112 | } |
2113 | ||
b0c632db HC |
2114 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
2115 | { | |
3c038e6b DD |
2116 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
2117 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
2118 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
2119 | KVM_SYNC_GPRS | | |
9eed0735 | 2120 | KVM_SYNC_ACRS | |
b028ee3e DH |
2121 | KVM_SYNC_CRS | |
2122 | KVM_SYNC_ARCH0 | | |
2123 | KVM_SYNC_PFAULT; | |
75a4615c | 2124 | kvm_s390_set_prefix(vcpu, 0); |
c6e5f166 FZ |
2125 | if (test_kvm_facility(vcpu->kvm, 64)) |
2126 | vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB; | |
4e0b1ab7 FZ |
2127 | if (test_kvm_facility(vcpu->kvm, 133)) |
2128 | vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB; | |
f6aa6dc4 DH |
2129 | /* fprs can be synchronized via vrs, even if the guest has no vx. With |
2130 | * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. | |
2131 | */ | |
2132 | if (MACHINE_HAS_VX) | |
68c55750 | 2133 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; |
6fd8e67d DH |
2134 | else |
2135 | vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS; | |
dafd032a DD |
2136 | |
2137 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2138 | return __kvm_ucontrol_vcpu_init(vcpu); | |
2139 | ||
b0c632db HC |
2140 | return 0; |
2141 | } | |
2142 | ||
db0758b2 DH |
2143 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
2144 | static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
2145 | { | |
2146 | WARN_ON_ONCE(vcpu->arch.cputm_start != 0); | |
9c23a131 | 2147 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 | 2148 | vcpu->arch.cputm_start = get_tod_clock_fast(); |
9c23a131 | 2149 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
2150 | } |
2151 | ||
2152 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
2153 | static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
2154 | { | |
2155 | WARN_ON_ONCE(vcpu->arch.cputm_start == 0); | |
9c23a131 | 2156 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
2157 | vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start; |
2158 | vcpu->arch.cputm_start = 0; | |
9c23a131 | 2159 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
2160 | } |
2161 | ||
2162 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
2163 | static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
2164 | { | |
2165 | WARN_ON_ONCE(vcpu->arch.cputm_enabled); | |
2166 | vcpu->arch.cputm_enabled = true; | |
2167 | __start_cpu_timer_accounting(vcpu); | |
2168 | } | |
2169 | ||
2170 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
2171 | static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
2172 | { | |
2173 | WARN_ON_ONCE(!vcpu->arch.cputm_enabled); | |
2174 | __stop_cpu_timer_accounting(vcpu); | |
2175 | vcpu->arch.cputm_enabled = false; | |
2176 | } | |
2177 | ||
2178 | static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
2179 | { | |
2180 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
2181 | __enable_cpu_timer_accounting(vcpu); | |
2182 | preempt_enable(); | |
2183 | } | |
2184 | ||
2185 | static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
2186 | { | |
2187 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
2188 | __disable_cpu_timer_accounting(vcpu); | |
2189 | preempt_enable(); | |
2190 | } | |
2191 | ||
4287f247 DH |
2192 | /* set the cpu timer - may only be called from the VCPU thread itself */ |
2193 | void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm) | |
2194 | { | |
db0758b2 | 2195 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
9c23a131 | 2196 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
2197 | if (vcpu->arch.cputm_enabled) |
2198 | vcpu->arch.cputm_start = get_tod_clock_fast(); | |
4287f247 | 2199 | vcpu->arch.sie_block->cputm = cputm; |
9c23a131 | 2200 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 | 2201 | preempt_enable(); |
4287f247 DH |
2202 | } |
2203 | ||
db0758b2 | 2204 | /* update and get the cpu timer - can also be called from other VCPU threads */ |
4287f247 DH |
2205 | __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) |
2206 | { | |
9c23a131 | 2207 | unsigned int seq; |
db0758b2 | 2208 | __u64 value; |
db0758b2 DH |
2209 | |
2210 | if (unlikely(!vcpu->arch.cputm_enabled)) | |
2211 | return vcpu->arch.sie_block->cputm; | |
2212 | ||
9c23a131 DH |
2213 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
2214 | do { | |
2215 | seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount); | |
2216 | /* | |
2217 | * If the writer would ever execute a read in the critical | |
2218 | * section, e.g. in irq context, we have a deadlock. | |
2219 | */ | |
2220 | WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu); | |
2221 | value = vcpu->arch.sie_block->cputm; | |
2222 | /* if cputm_start is 0, accounting is being started/stopped */ | |
2223 | if (likely(vcpu->arch.cputm_start)) | |
2224 | value -= get_tod_clock_fast() - vcpu->arch.cputm_start; | |
2225 | } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1)); | |
2226 | preempt_enable(); | |
db0758b2 | 2227 | return value; |
4287f247 DH |
2228 | } |
2229 | ||
b0c632db HC |
2230 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2231 | { | |
9977e886 | 2232 | |
37d9df98 | 2233 | gmap_enable(vcpu->arch.enabled_gmap); |
805de8f4 | 2234 | atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
5ebda316 | 2235 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 2236 | __start_cpu_timer_accounting(vcpu); |
01a745ac | 2237 | vcpu->cpu = cpu; |
b0c632db HC |
2238 | } |
2239 | ||
2240 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2241 | { | |
01a745ac | 2242 | vcpu->cpu = -1; |
5ebda316 | 2243 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 2244 | __stop_cpu_timer_accounting(vcpu); |
805de8f4 | 2245 | atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
37d9df98 DH |
2246 | vcpu->arch.enabled_gmap = gmap_get_enabled(); |
2247 | gmap_disable(vcpu->arch.enabled_gmap); | |
9977e886 | 2248 | |
b0c632db HC |
2249 | } |
2250 | ||
2251 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
2252 | { | |
2253 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
2254 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
2255 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 2256 | kvm_s390_set_prefix(vcpu, 0); |
4287f247 | 2257 | kvm_s390_set_cpu_timer(vcpu, 0); |
b0c632db HC |
2258 | vcpu->arch.sie_block->ckc = 0UL; |
2259 | vcpu->arch.sie_block->todpr = 0; | |
2260 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
2261 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
2262 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
9abc2a08 DH |
2263 | /* make sure the new fpc will be lazily loaded */ |
2264 | save_fpu_regs(); | |
2265 | current->thread.fpu.fpc = 0; | |
b0c632db | 2266 | vcpu->arch.sie_block->gbea = 1; |
672550fb | 2267 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
2268 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
2269 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
2270 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
2271 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 2272 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
2273 | } |
2274 | ||
31928aa5 | 2275 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 2276 | { |
72f25020 | 2277 | mutex_lock(&vcpu->kvm->lock); |
fdf03650 | 2278 | preempt_disable(); |
72f25020 | 2279 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
fdf03650 | 2280 | preempt_enable(); |
72f25020 | 2281 | mutex_unlock(&vcpu->kvm->lock); |
25508824 | 2282 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
dafd032a | 2283 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
eaa78f34 | 2284 | sca_add_vcpu(vcpu); |
25508824 | 2285 | } |
6502a34c DH |
2286 | if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0) |
2287 | vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; | |
37d9df98 DH |
2288 | /* make vcpu_load load the right gmap on the first trigger */ |
2289 | vcpu->arch.enabled_gmap = vcpu->arch.gmap; | |
42897d86 MT |
2290 | } |
2291 | ||
5102ee87 TK |
2292 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
2293 | { | |
9d8d5786 | 2294 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
2295 | return; |
2296 | ||
a374e892 TK |
2297 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
2298 | ||
2299 | if (vcpu->kvm->arch.crypto.aes_kw) | |
2300 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
2301 | if (vcpu->kvm->arch.crypto.dea_kw) | |
2302 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
2303 | ||
5102ee87 TK |
2304 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
2305 | } | |
2306 | ||
b31605c1 DD |
2307 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
2308 | { | |
2309 | free_page(vcpu->arch.sie_block->cbrlo); | |
2310 | vcpu->arch.sie_block->cbrlo = 0; | |
2311 | } | |
2312 | ||
2313 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
2314 | { | |
2315 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
2316 | if (!vcpu->arch.sie_block->cbrlo) | |
2317 | return -ENOMEM; | |
2318 | ||
0c9d8683 | 2319 | vcpu->arch.sie_block->ecb2 &= ~ECB2_PFMFI; |
b31605c1 DD |
2320 | return 0; |
2321 | } | |
2322 | ||
91520f1a MM |
2323 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
2324 | { | |
2325 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
2326 | ||
91520f1a | 2327 | vcpu->arch.sie_block->ibc = model->ibc; |
80bc79dc | 2328 | if (test_kvm_facility(vcpu->kvm, 7)) |
c54f0d6a | 2329 | vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list; |
91520f1a MM |
2330 | } |
2331 | ||
b0c632db HC |
2332 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
2333 | { | |
b31605c1 | 2334 | int rc = 0; |
b31288fa | 2335 | |
9e6dabef CH |
2336 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
2337 | CPUSTAT_SM | | |
a4a4f191 GH |
2338 | CPUSTAT_STOPPED); |
2339 | ||
53df84f8 | 2340 | if (test_kvm_facility(vcpu->kvm, 78)) |
805de8f4 | 2341 | atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); |
53df84f8 | 2342 | else if (test_kvm_facility(vcpu->kvm, 8)) |
805de8f4 | 2343 | atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
a4a4f191 | 2344 | |
91520f1a MM |
2345 | kvm_s390_vcpu_setup_model(vcpu); |
2346 | ||
bdab09f3 DH |
2347 | /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */ |
2348 | if (MACHINE_HAS_ESOP) | |
0c9d8683 | 2349 | vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT; |
bd50e8ec | 2350 | if (test_kvm_facility(vcpu->kvm, 9)) |
0c9d8683 | 2351 | vcpu->arch.sie_block->ecb |= ECB_SRSI; |
f597d24e | 2352 | if (test_kvm_facility(vcpu->kvm, 73)) |
0c9d8683 | 2353 | vcpu->arch.sie_block->ecb |= ECB_TE; |
7feb6bb8 | 2354 | |
873b425e | 2355 | if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi) |
0c9d8683 | 2356 | vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI; |
cd1836f5 | 2357 | if (test_kvm_facility(vcpu->kvm, 130)) |
0c9d8683 DH |
2358 | vcpu->arch.sie_block->ecb2 |= ECB2_IEP; |
2359 | vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI; | |
48ee7d3a | 2360 | if (sclp.has_cei) |
0c9d8683 | 2361 | vcpu->arch.sie_block->eca |= ECA_CEI; |
11ad65b7 | 2362 | if (sclp.has_ib) |
0c9d8683 | 2363 | vcpu->arch.sie_block->eca |= ECA_IB; |
37c5f6c8 | 2364 | if (sclp.has_siif) |
0c9d8683 | 2365 | vcpu->arch.sie_block->eca |= ECA_SII; |
37c5f6c8 | 2366 | if (sclp.has_sigpif) |
0c9d8683 | 2367 | vcpu->arch.sie_block->eca |= ECA_SIGPI; |
18280d8b | 2368 | if (test_kvm_facility(vcpu->kvm, 129)) { |
0c9d8683 DH |
2369 | vcpu->arch.sie_block->eca |= ECA_VX; |
2370 | vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT; | |
13211ea7 | 2371 | } |
4e0b1ab7 FZ |
2372 | vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx) |
2373 | | SDNXC; | |
c6e5f166 | 2374 | vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb; |
730cd632 FA |
2375 | |
2376 | if (sclp.has_kss) | |
2377 | atomic_or(CPUSTAT_KSS, &vcpu->arch.sie_block->cpuflags); | |
2378 | else | |
2379 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; | |
5a5e6536 | 2380 | |
e6db1d61 | 2381 | if (vcpu->kvm->arch.use_cmma) { |
b31605c1 DD |
2382 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
2383 | if (rc) | |
2384 | return rc; | |
b31288fa | 2385 | } |
0ac96caf | 2386 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 2387 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 2388 | |
5102ee87 TK |
2389 | kvm_s390_vcpu_crypto_setup(vcpu); |
2390 | ||
b31605c1 | 2391 | return rc; |
b0c632db HC |
2392 | } |
2393 | ||
2394 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
2395 | unsigned int id) | |
2396 | { | |
4d47555a | 2397 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 2398 | struct sie_page *sie_page; |
4d47555a CO |
2399 | int rc = -EINVAL; |
2400 | ||
4215825e | 2401 | if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id)) |
4d47555a CO |
2402 | goto out; |
2403 | ||
2404 | rc = -ENOMEM; | |
b0c632db | 2405 | |
b110feaf | 2406 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 2407 | if (!vcpu) |
4d47555a | 2408 | goto out; |
b0c632db | 2409 | |
da72ca4d | 2410 | BUILD_BUG_ON(sizeof(struct sie_page) != 4096); |
7feb6bb8 MM |
2411 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
2412 | if (!sie_page) | |
b0c632db HC |
2413 | goto out_free_cpu; |
2414 | ||
7feb6bb8 MM |
2415 | vcpu->arch.sie_block = &sie_page->sie_block; |
2416 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
2417 | ||
efed1104 DH |
2418 | /* the real guest size will always be smaller than msl */ |
2419 | vcpu->arch.sie_block->mso = 0; | |
2420 | vcpu->arch.sie_block->msl = sclp.hamax; | |
2421 | ||
b0c632db | 2422 | vcpu->arch.sie_block->icpua = id; |
ba5c1e9b | 2423 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 2424 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 2425 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 2426 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
9c23a131 | 2427 | seqcount_init(&vcpu->arch.cputm_seqcount); |
ba5c1e9b | 2428 | |
b0c632db HC |
2429 | rc = kvm_vcpu_init(vcpu, kvm, id); |
2430 | if (rc) | |
9abc2a08 | 2431 | goto out_free_sie_block; |
8335713a | 2432 | VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu, |
b0c632db | 2433 | vcpu->arch.sie_block); |
ade38c31 | 2434 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 2435 | |
b0c632db | 2436 | return vcpu; |
7b06bf2f WY |
2437 | out_free_sie_block: |
2438 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 2439 | out_free_cpu: |
b110feaf | 2440 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 2441 | out: |
b0c632db HC |
2442 | return ERR_PTR(rc); |
2443 | } | |
2444 | ||
b0c632db HC |
2445 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
2446 | { | |
9a022067 | 2447 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
2448 | } |
2449 | ||
27406cd5 | 2450 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e | 2451 | { |
805de8f4 | 2452 | atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
61a6df54 | 2453 | exit_sie(vcpu); |
49b99e1e CB |
2454 | } |
2455 | ||
27406cd5 | 2456 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e | 2457 | { |
805de8f4 | 2458 | atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
49b99e1e CB |
2459 | } |
2460 | ||
8e236546 CB |
2461 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
2462 | { | |
805de8f4 | 2463 | atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
61a6df54 | 2464 | exit_sie(vcpu); |
8e236546 CB |
2465 | } |
2466 | ||
2467 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
2468 | { | |
9bf9fde2 | 2469 | atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
8e236546 CB |
2470 | } |
2471 | ||
49b99e1e CB |
2472 | /* |
2473 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
2474 | * If the CPU is not running (e.g. waiting as idle) the function will | |
2475 | * return immediately. */ | |
2476 | void exit_sie(struct kvm_vcpu *vcpu) | |
2477 | { | |
805de8f4 | 2478 | atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
49b99e1e CB |
2479 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
2480 | cpu_relax(); | |
2481 | } | |
2482 | ||
8e236546 CB |
2483 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
2484 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 2485 | { |
8e236546 CB |
2486 | kvm_make_request(req, vcpu); |
2487 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
2488 | } |
2489 | ||
414d3b07 MS |
2490 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
2491 | unsigned long end) | |
2c70fe44 | 2492 | { |
2c70fe44 CB |
2493 | struct kvm *kvm = gmap->private; |
2494 | struct kvm_vcpu *vcpu; | |
414d3b07 MS |
2495 | unsigned long prefix; |
2496 | int i; | |
2c70fe44 | 2497 | |
65d0b0d4 DH |
2498 | if (gmap_is_shadow(gmap)) |
2499 | return; | |
414d3b07 MS |
2500 | if (start >= 1UL << 31) |
2501 | /* We are only interested in prefix pages */ | |
2502 | return; | |
2c70fe44 CB |
2503 | kvm_for_each_vcpu(i, vcpu, kvm) { |
2504 | /* match against both prefix pages */ | |
414d3b07 MS |
2505 | prefix = kvm_s390_get_prefix(vcpu); |
2506 | if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) { | |
2507 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx", | |
2508 | start, end); | |
8e236546 | 2509 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
2510 | } |
2511 | } | |
2512 | } | |
2513 | ||
b6d33834 CD |
2514 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
2515 | { | |
2516 | /* kvm common code refers to this, but never calls it */ | |
2517 | BUG(); | |
2518 | return 0; | |
2519 | } | |
2520 | ||
14eebd91 CO |
2521 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
2522 | struct kvm_one_reg *reg) | |
2523 | { | |
2524 | int r = -EINVAL; | |
2525 | ||
2526 | switch (reg->id) { | |
29b7c71b CO |
2527 | case KVM_REG_S390_TODPR: |
2528 | r = put_user(vcpu->arch.sie_block->todpr, | |
2529 | (u32 __user *)reg->addr); | |
2530 | break; | |
2531 | case KVM_REG_S390_EPOCHDIFF: | |
2532 | r = put_user(vcpu->arch.sie_block->epoch, | |
2533 | (u64 __user *)reg->addr); | |
2534 | break; | |
46a6dd1c | 2535 | case KVM_REG_S390_CPU_TIMER: |
4287f247 | 2536 | r = put_user(kvm_s390_get_cpu_timer(vcpu), |
46a6dd1c J |
2537 | (u64 __user *)reg->addr); |
2538 | break; | |
2539 | case KVM_REG_S390_CLOCK_COMP: | |
2540 | r = put_user(vcpu->arch.sie_block->ckc, | |
2541 | (u64 __user *)reg->addr); | |
2542 | break; | |
536336c2 DD |
2543 | case KVM_REG_S390_PFTOKEN: |
2544 | r = put_user(vcpu->arch.pfault_token, | |
2545 | (u64 __user *)reg->addr); | |
2546 | break; | |
2547 | case KVM_REG_S390_PFCOMPARE: | |
2548 | r = put_user(vcpu->arch.pfault_compare, | |
2549 | (u64 __user *)reg->addr); | |
2550 | break; | |
2551 | case KVM_REG_S390_PFSELECT: | |
2552 | r = put_user(vcpu->arch.pfault_select, | |
2553 | (u64 __user *)reg->addr); | |
2554 | break; | |
672550fb CB |
2555 | case KVM_REG_S390_PP: |
2556 | r = put_user(vcpu->arch.sie_block->pp, | |
2557 | (u64 __user *)reg->addr); | |
2558 | break; | |
afa45ff5 CB |
2559 | case KVM_REG_S390_GBEA: |
2560 | r = put_user(vcpu->arch.sie_block->gbea, | |
2561 | (u64 __user *)reg->addr); | |
2562 | break; | |
14eebd91 CO |
2563 | default: |
2564 | break; | |
2565 | } | |
2566 | ||
2567 | return r; | |
2568 | } | |
2569 | ||
2570 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
2571 | struct kvm_one_reg *reg) | |
2572 | { | |
2573 | int r = -EINVAL; | |
4287f247 | 2574 | __u64 val; |
14eebd91 CO |
2575 | |
2576 | switch (reg->id) { | |
29b7c71b CO |
2577 | case KVM_REG_S390_TODPR: |
2578 | r = get_user(vcpu->arch.sie_block->todpr, | |
2579 | (u32 __user *)reg->addr); | |
2580 | break; | |
2581 | case KVM_REG_S390_EPOCHDIFF: | |
2582 | r = get_user(vcpu->arch.sie_block->epoch, | |
2583 | (u64 __user *)reg->addr); | |
2584 | break; | |
46a6dd1c | 2585 | case KVM_REG_S390_CPU_TIMER: |
4287f247 DH |
2586 | r = get_user(val, (u64 __user *)reg->addr); |
2587 | if (!r) | |
2588 | kvm_s390_set_cpu_timer(vcpu, val); | |
46a6dd1c J |
2589 | break; |
2590 | case KVM_REG_S390_CLOCK_COMP: | |
2591 | r = get_user(vcpu->arch.sie_block->ckc, | |
2592 | (u64 __user *)reg->addr); | |
2593 | break; | |
536336c2 DD |
2594 | case KVM_REG_S390_PFTOKEN: |
2595 | r = get_user(vcpu->arch.pfault_token, | |
2596 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
2597 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2598 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
2599 | break; |
2600 | case KVM_REG_S390_PFCOMPARE: | |
2601 | r = get_user(vcpu->arch.pfault_compare, | |
2602 | (u64 __user *)reg->addr); | |
2603 | break; | |
2604 | case KVM_REG_S390_PFSELECT: | |
2605 | r = get_user(vcpu->arch.pfault_select, | |
2606 | (u64 __user *)reg->addr); | |
2607 | break; | |
672550fb CB |
2608 | case KVM_REG_S390_PP: |
2609 | r = get_user(vcpu->arch.sie_block->pp, | |
2610 | (u64 __user *)reg->addr); | |
2611 | break; | |
afa45ff5 CB |
2612 | case KVM_REG_S390_GBEA: |
2613 | r = get_user(vcpu->arch.sie_block->gbea, | |
2614 | (u64 __user *)reg->addr); | |
2615 | break; | |
14eebd91 CO |
2616 | default: |
2617 | break; | |
2618 | } | |
2619 | ||
2620 | return r; | |
2621 | } | |
b6d33834 | 2622 | |
b0c632db HC |
2623 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
2624 | { | |
b0c632db | 2625 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
2626 | return 0; |
2627 | } | |
2628 | ||
2629 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2630 | { | |
5a32c1af | 2631 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
2632 | return 0; |
2633 | } | |
2634 | ||
2635 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2636 | { | |
5a32c1af | 2637 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
2638 | return 0; |
2639 | } | |
2640 | ||
2641 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
2642 | struct kvm_sregs *sregs) | |
2643 | { | |
59674c1a | 2644 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 2645 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
b0c632db HC |
2646 | return 0; |
2647 | } | |
2648 | ||
2649 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
2650 | struct kvm_sregs *sregs) | |
2651 | { | |
59674c1a | 2652 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 2653 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
2654 | return 0; |
2655 | } | |
2656 | ||
2657 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2658 | { | |
4725c860 MS |
2659 | if (test_fp_ctl(fpu->fpc)) |
2660 | return -EINVAL; | |
e1788bb9 | 2661 | vcpu->run->s.regs.fpc = fpu->fpc; |
9abc2a08 | 2662 | if (MACHINE_HAS_VX) |
a7d4b8f2 DH |
2663 | convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs, |
2664 | (freg_t *) fpu->fprs); | |
9abc2a08 | 2665 | else |
a7d4b8f2 | 2666 | memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
b0c632db HC |
2667 | return 0; |
2668 | } | |
2669 | ||
2670 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2671 | { | |
9abc2a08 DH |
2672 | /* make sure we have the latest values */ |
2673 | save_fpu_regs(); | |
2674 | if (MACHINE_HAS_VX) | |
a7d4b8f2 DH |
2675 | convert_vx_to_fp((freg_t *) fpu->fprs, |
2676 | (__vector128 *) vcpu->run->s.regs.vrs); | |
9abc2a08 | 2677 | else |
a7d4b8f2 | 2678 | memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs)); |
e1788bb9 | 2679 | fpu->fpc = vcpu->run->s.regs.fpc; |
b0c632db HC |
2680 | return 0; |
2681 | } | |
2682 | ||
2683 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
2684 | { | |
2685 | int rc = 0; | |
2686 | ||
7a42fdc2 | 2687 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 2688 | rc = -EBUSY; |
d7b0b5eb CO |
2689 | else { |
2690 | vcpu->run->psw_mask = psw.mask; | |
2691 | vcpu->run->psw_addr = psw.addr; | |
2692 | } | |
b0c632db HC |
2693 | return rc; |
2694 | } | |
2695 | ||
2696 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
2697 | struct kvm_translation *tr) | |
2698 | { | |
2699 | return -EINVAL; /* not implemented yet */ | |
2700 | } | |
2701 | ||
27291e21 DH |
2702 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
2703 | KVM_GUESTDBG_USE_HW_BP | \ | |
2704 | KVM_GUESTDBG_ENABLE) | |
2705 | ||
d0bfb940 JK |
2706 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
2707 | struct kvm_guest_debug *dbg) | |
b0c632db | 2708 | { |
27291e21 DH |
2709 | int rc = 0; |
2710 | ||
2711 | vcpu->guest_debug = 0; | |
2712 | kvm_s390_clear_bp_data(vcpu); | |
2713 | ||
2de3bfc2 | 2714 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 | 2715 | return -EINVAL; |
89b5b4de DH |
2716 | if (!sclp.has_gpere) |
2717 | return -EINVAL; | |
27291e21 DH |
2718 | |
2719 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
2720 | vcpu->guest_debug = dbg->control; | |
2721 | /* enforce guest PER */ | |
805de8f4 | 2722 | atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2723 | |
2724 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
2725 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
2726 | } else { | |
805de8f4 | 2727 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2728 | vcpu->arch.guestdbg.last_bp = 0; |
2729 | } | |
2730 | ||
2731 | if (rc) { | |
2732 | vcpu->guest_debug = 0; | |
2733 | kvm_s390_clear_bp_data(vcpu); | |
805de8f4 | 2734 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2735 | } |
2736 | ||
2737 | return rc; | |
b0c632db HC |
2738 | } |
2739 | ||
62d9f0db MT |
2740 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
2741 | struct kvm_mp_state *mp_state) | |
2742 | { | |
6352e4d2 DH |
2743 | /* CHECK_STOP and LOAD are not supported yet */ |
2744 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
2745 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
2746 | } |
2747 | ||
2748 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
2749 | struct kvm_mp_state *mp_state) | |
2750 | { | |
6352e4d2 DH |
2751 | int rc = 0; |
2752 | ||
2753 | /* user space knows about this interface - let it control the state */ | |
2754 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
2755 | ||
2756 | switch (mp_state->mp_state) { | |
2757 | case KVM_MP_STATE_STOPPED: | |
2758 | kvm_s390_vcpu_stop(vcpu); | |
2759 | break; | |
2760 | case KVM_MP_STATE_OPERATING: | |
2761 | kvm_s390_vcpu_start(vcpu); | |
2762 | break; | |
2763 | case KVM_MP_STATE_LOAD: | |
2764 | case KVM_MP_STATE_CHECK_STOP: | |
2765 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
2766 | default: | |
2767 | rc = -ENXIO; | |
2768 | } | |
2769 | ||
2770 | return rc; | |
62d9f0db MT |
2771 | } |
2772 | ||
8ad35755 DH |
2773 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
2774 | { | |
2775 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
2776 | } | |
2777 | ||
2c70fe44 CB |
2778 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
2779 | { | |
8ad35755 | 2780 | retry: |
8e236546 | 2781 | kvm_s390_vcpu_request_handled(vcpu); |
2fa6e1e1 | 2782 | if (!kvm_request_pending(vcpu)) |
586b7ccd | 2783 | return 0; |
2c70fe44 CB |
2784 | /* |
2785 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
b2d73b2a | 2786 | * guest prefix page. gmap_mprotect_notify will wait on the ptl lock. |
2c70fe44 CB |
2787 | * This ensures that the ipte instruction for this request has |
2788 | * already finished. We might race against a second unmapper that | |
2789 | * wants to set the blocking bit. Lets just retry the request loop. | |
2790 | */ | |
8ad35755 | 2791 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 | 2792 | int rc; |
b2d73b2a MS |
2793 | rc = gmap_mprotect_notify(vcpu->arch.gmap, |
2794 | kvm_s390_get_prefix(vcpu), | |
2795 | PAGE_SIZE * 2, PROT_WRITE); | |
aca411a4 JN |
2796 | if (rc) { |
2797 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
2c70fe44 | 2798 | return rc; |
aca411a4 | 2799 | } |
8ad35755 | 2800 | goto retry; |
2c70fe44 | 2801 | } |
8ad35755 | 2802 | |
d3d692c8 DH |
2803 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
2804 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
2805 | goto retry; | |
2806 | } | |
2807 | ||
8ad35755 DH |
2808 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
2809 | if (!ibs_enabled(vcpu)) { | |
2810 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
805de8f4 | 2811 | atomic_or(CPUSTAT_IBS, |
8ad35755 DH |
2812 | &vcpu->arch.sie_block->cpuflags); |
2813 | } | |
2814 | goto retry; | |
2c70fe44 | 2815 | } |
8ad35755 DH |
2816 | |
2817 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
2818 | if (ibs_enabled(vcpu)) { | |
2819 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
805de8f4 | 2820 | atomic_andnot(CPUSTAT_IBS, |
8ad35755 DH |
2821 | &vcpu->arch.sie_block->cpuflags); |
2822 | } | |
2823 | goto retry; | |
2824 | } | |
2825 | ||
6502a34c DH |
2826 | if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) { |
2827 | vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; | |
2828 | goto retry; | |
2829 | } | |
2830 | ||
190df4a2 CI |
2831 | if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) { |
2832 | /* | |
2833 | * Disable CMMA virtualization; we will emulate the ESSA | |
2834 | * instruction manually, in order to provide additional | |
2835 | * functionalities needed for live migration. | |
2836 | */ | |
2837 | vcpu->arch.sie_block->ecb2 &= ~ECB2_CMMA; | |
2838 | goto retry; | |
2839 | } | |
2840 | ||
2841 | if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) { | |
2842 | /* | |
2843 | * Re-enable CMMA virtualization if CMMA is available and | |
2844 | * was used. | |
2845 | */ | |
2846 | if ((vcpu->kvm->arch.use_cmma) && | |
2847 | (vcpu->kvm->mm->context.use_cmma)) | |
2848 | vcpu->arch.sie_block->ecb2 |= ECB2_CMMA; | |
2849 | goto retry; | |
2850 | } | |
2851 | ||
0759d068 | 2852 | /* nothing to do, just clear the request */ |
72875d8a | 2853 | kvm_clear_request(KVM_REQ_UNHALT, vcpu); |
0759d068 | 2854 | |
2c70fe44 CB |
2855 | return 0; |
2856 | } | |
2857 | ||
25ed1675 DH |
2858 | void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod) |
2859 | { | |
2860 | struct kvm_vcpu *vcpu; | |
2861 | int i; | |
2862 | ||
2863 | mutex_lock(&kvm->lock); | |
2864 | preempt_disable(); | |
2865 | kvm->arch.epoch = tod - get_tod_clock(); | |
2866 | kvm_s390_vcpu_block_all(kvm); | |
2867 | kvm_for_each_vcpu(i, vcpu, kvm) | |
2868 | vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
2869 | kvm_s390_vcpu_unblock_all(kvm); | |
2870 | preempt_enable(); | |
2871 | mutex_unlock(&kvm->lock); | |
2872 | } | |
2873 | ||
fa576c58 TH |
2874 | /** |
2875 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
2876 | * @vcpu: The corresponding virtual cpu | |
2877 | * @gpa: Guest physical address | |
2878 | * @writable: Whether the page should be writable or not | |
2879 | * | |
2880 | * Make sure that a guest page has been faulted-in on the host. | |
2881 | * | |
2882 | * Return: Zero on success, negative error code otherwise. | |
2883 | */ | |
2884 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 2885 | { |
527e30b4 MS |
2886 | return gmap_fault(vcpu->arch.gmap, gpa, |
2887 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
2888 | } |
2889 | ||
3c038e6b DD |
2890 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
2891 | unsigned long token) | |
2892 | { | |
2893 | struct kvm_s390_interrupt inti; | |
383d0b05 | 2894 | struct kvm_s390_irq irq; |
3c038e6b DD |
2895 | |
2896 | if (start_token) { | |
383d0b05 JF |
2897 | irq.u.ext.ext_params2 = token; |
2898 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
2899 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
2900 | } else { |
2901 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 2902 | inti.parm64 = token; |
3c038e6b DD |
2903 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
2904 | } | |
2905 | } | |
2906 | ||
2907 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
2908 | struct kvm_async_pf *work) | |
2909 | { | |
2910 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
2911 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
2912 | } | |
2913 | ||
2914 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
2915 | struct kvm_async_pf *work) | |
2916 | { | |
2917 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
2918 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
2919 | } | |
2920 | ||
2921 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
2922 | struct kvm_async_pf *work) | |
2923 | { | |
2924 | /* s390 will always inject the page directly */ | |
2925 | } | |
2926 | ||
2927 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
2928 | { | |
2929 | /* | |
2930 | * s390 will always inject the page directly, | |
2931 | * but we still want check_async_completion to cleanup | |
2932 | */ | |
2933 | return true; | |
2934 | } | |
2935 | ||
2936 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
2937 | { | |
2938 | hva_t hva; | |
2939 | struct kvm_arch_async_pf arch; | |
2940 | int rc; | |
2941 | ||
2942 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
2943 | return 0; | |
2944 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
2945 | vcpu->arch.pfault_compare) | |
2946 | return 0; | |
2947 | if (psw_extint_disabled(vcpu)) | |
2948 | return 0; | |
9a022067 | 2949 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
2950 | return 0; |
2951 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
2952 | return 0; | |
2953 | if (!vcpu->arch.gmap->pfault_enabled) | |
2954 | return 0; | |
2955 | ||
81480cc1 HC |
2956 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
2957 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
2958 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
2959 | return 0; |
2960 | ||
2961 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
2962 | return rc; | |
2963 | } | |
2964 | ||
3fb4c40f | 2965 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 2966 | { |
3fb4c40f | 2967 | int rc, cpuflags; |
e168bf8d | 2968 | |
3c038e6b DD |
2969 | /* |
2970 | * On s390 notifications for arriving pages will be delivered directly | |
2971 | * to the guest but the house keeping for completed pfaults is | |
2972 | * handled outside the worker. | |
2973 | */ | |
2974 | kvm_check_async_pf_completion(vcpu); | |
2975 | ||
7ec7c8c7 CB |
2976 | vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14]; |
2977 | vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15]; | |
b0c632db HC |
2978 | |
2979 | if (need_resched()) | |
2980 | schedule(); | |
2981 | ||
d3a73acb | 2982 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
2983 | s390_handle_mcck(); |
2984 | ||
79395031 JF |
2985 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
2986 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
2987 | if (rc) | |
2988 | return rc; | |
2989 | } | |
0ff31867 | 2990 | |
2c70fe44 CB |
2991 | rc = kvm_s390_handle_requests(vcpu); |
2992 | if (rc) | |
2993 | return rc; | |
2994 | ||
27291e21 DH |
2995 | if (guestdbg_enabled(vcpu)) { |
2996 | kvm_s390_backup_guest_per_regs(vcpu); | |
2997 | kvm_s390_patch_guest_per_regs(vcpu); | |
2998 | } | |
2999 | ||
b0c632db | 3000 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
3001 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
3002 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
3003 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 3004 | |
3fb4c40f TH |
3005 | return 0; |
3006 | } | |
3007 | ||
492d8642 TH |
3008 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
3009 | { | |
56317920 DH |
3010 | struct kvm_s390_pgm_info pgm_info = { |
3011 | .code = PGM_ADDRESSING, | |
3012 | }; | |
3013 | u8 opcode, ilen; | |
492d8642 TH |
3014 | int rc; |
3015 | ||
3016 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
3017 | trace_kvm_s390_sie_fault(vcpu); | |
3018 | ||
3019 | /* | |
3020 | * We want to inject an addressing exception, which is defined as a | |
3021 | * suppressing or terminating exception. However, since we came here | |
3022 | * by a DAT access exception, the PSW still points to the faulting | |
3023 | * instruction since DAT exceptions are nullifying. So we've got | |
3024 | * to look up the current opcode to get the length of the instruction | |
3025 | * to be able to forward the PSW. | |
3026 | */ | |
3fa8cad7 | 3027 | rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1); |
56317920 | 3028 | ilen = insn_length(opcode); |
9b0d721a DH |
3029 | if (rc < 0) { |
3030 | return rc; | |
3031 | } else if (rc) { | |
3032 | /* Instruction-Fetching Exceptions - we can't detect the ilen. | |
3033 | * Forward by arbitrary ilc, injection will take care of | |
3034 | * nullification if necessary. | |
3035 | */ | |
3036 | pgm_info = vcpu->arch.pgm; | |
3037 | ilen = 4; | |
3038 | } | |
56317920 DH |
3039 | pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID; |
3040 | kvm_s390_forward_psw(vcpu, ilen); | |
3041 | return kvm_s390_inject_prog_irq(vcpu, &pgm_info); | |
492d8642 TH |
3042 | } |
3043 | ||
3fb4c40f TH |
3044 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
3045 | { | |
4d62fcc0 QH |
3046 | struct mcck_volatile_info *mcck_info; |
3047 | struct sie_page *sie_page; | |
3048 | ||
2b29a9fd DD |
3049 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
3050 | vcpu->arch.sie_block->icptcode); | |
3051 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
3052 | ||
27291e21 DH |
3053 | if (guestdbg_enabled(vcpu)) |
3054 | kvm_s390_restore_guest_per_regs(vcpu); | |
3055 | ||
7ec7c8c7 CB |
3056 | vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14; |
3057 | vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15; | |
71f116bf | 3058 | |
4d62fcc0 QH |
3059 | if (exit_reason == -EINTR) { |
3060 | VCPU_EVENT(vcpu, 3, "%s", "machine check"); | |
3061 | sie_page = container_of(vcpu->arch.sie_block, | |
3062 | struct sie_page, sie_block); | |
3063 | mcck_info = &sie_page->mcck_info; | |
3064 | kvm_s390_reinject_machine_check(vcpu, mcck_info); | |
3065 | return 0; | |
3066 | } | |
3067 | ||
71f116bf DH |
3068 | if (vcpu->arch.sie_block->icptcode > 0) { |
3069 | int rc = kvm_handle_sie_intercept(vcpu); | |
3070 | ||
3071 | if (rc != -EOPNOTSUPP) | |
3072 | return rc; | |
3073 | vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC; | |
3074 | vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
3075 | vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
3076 | vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
3077 | return -EREMOTE; | |
3078 | } else if (exit_reason != -EFAULT) { | |
3079 | vcpu->stat.exit_null++; | |
3080 | return 0; | |
210b1607 TH |
3081 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
3082 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
3083 | vcpu->run->s390_ucontrol.trans_exc_code = | |
3084 | current->thread.gmap_addr; | |
3085 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
71f116bf | 3086 | return -EREMOTE; |
24eb3a82 | 3087 | } else if (current->thread.gmap_pfault) { |
3c038e6b | 3088 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 3089 | current->thread.gmap_pfault = 0; |
71f116bf DH |
3090 | if (kvm_arch_setup_async_pf(vcpu)) |
3091 | return 0; | |
3092 | return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1); | |
a76ccff6 | 3093 | } |
71f116bf | 3094 | return vcpu_post_run_fault_in_sie(vcpu); |
3fb4c40f TH |
3095 | } |
3096 | ||
3097 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
3098 | { | |
3099 | int rc, exit_reason; | |
3100 | ||
800c1065 TH |
3101 | /* |
3102 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
3103 | * ning the guest), so that memslots (and other stuff) are protected | |
3104 | */ | |
3105 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
3106 | ||
a76ccff6 TH |
3107 | do { |
3108 | rc = vcpu_pre_run(vcpu); | |
3109 | if (rc) | |
3110 | break; | |
3fb4c40f | 3111 | |
800c1065 | 3112 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
3113 | /* |
3114 | * As PF_VCPU will be used in fault handler, between | |
3115 | * guest_enter and guest_exit should be no uaccess. | |
3116 | */ | |
0097d12e | 3117 | local_irq_disable(); |
6edaa530 | 3118 | guest_enter_irqoff(); |
db0758b2 | 3119 | __disable_cpu_timer_accounting(vcpu); |
0097d12e | 3120 | local_irq_enable(); |
a76ccff6 TH |
3121 | exit_reason = sie64a(vcpu->arch.sie_block, |
3122 | vcpu->run->s.regs.gprs); | |
0097d12e | 3123 | local_irq_disable(); |
db0758b2 | 3124 | __enable_cpu_timer_accounting(vcpu); |
6edaa530 | 3125 | guest_exit_irqoff(); |
0097d12e | 3126 | local_irq_enable(); |
800c1065 | 3127 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
3128 | |
3129 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 3130 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 3131 | |
800c1065 | 3132 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 3133 | return rc; |
b0c632db HC |
3134 | } |
3135 | ||
b028ee3e DH |
3136 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
3137 | { | |
4d5f2c04 | 3138 | struct runtime_instr_cb *riccb; |
4e0b1ab7 | 3139 | struct gs_cb *gscb; |
4d5f2c04 CB |
3140 | |
3141 | riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb; | |
4e0b1ab7 | 3142 | gscb = (struct gs_cb *) &kvm_run->s.regs.gscb; |
b028ee3e DH |
3143 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
3144 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
3145 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
3146 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
3147 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
3148 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
3149 | /* some control register changes require a tlb flush */ |
3150 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
3151 | } |
3152 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
4287f247 | 3153 | kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm); |
b028ee3e DH |
3154 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; |
3155 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
3156 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
3157 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
3158 | } | |
3159 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
3160 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
3161 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
3162 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
3163 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
3164 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e | 3165 | } |
80cd8763 FZ |
3166 | /* |
3167 | * If userspace sets the riccb (e.g. after migration) to a valid state, | |
3168 | * we should enable RI here instead of doing the lazy enablement. | |
3169 | */ | |
3170 | if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) && | |
4d5f2c04 CB |
3171 | test_kvm_facility(vcpu->kvm, 64) && |
3172 | riccb->valid && | |
0c9d8683 | 3173 | !(vcpu->arch.sie_block->ecb3 & ECB3_RI)) { |
4d5f2c04 | 3174 | VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)"); |
0c9d8683 | 3175 | vcpu->arch.sie_block->ecb3 |= ECB3_RI; |
80cd8763 | 3176 | } |
4e0b1ab7 FZ |
3177 | /* |
3178 | * If userspace sets the gscb (e.g. after migration) to non-zero, | |
3179 | * we should enable GS here instead of doing the lazy enablement. | |
3180 | */ | |
3181 | if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) && | |
3182 | test_kvm_facility(vcpu->kvm, 133) && | |
3183 | gscb->gssm && | |
3184 | !vcpu->arch.gs_enabled) { | |
3185 | VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)"); | |
3186 | vcpu->arch.sie_block->ecb |= ECB_GS; | |
3187 | vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT; | |
3188 | vcpu->arch.gs_enabled = 1; | |
80cd8763 | 3189 | } |
31d8b8d4 CB |
3190 | save_access_regs(vcpu->arch.host_acrs); |
3191 | restore_access_regs(vcpu->run->s.regs.acrs); | |
e1788bb9 CB |
3192 | /* save host (userspace) fprs/vrs */ |
3193 | save_fpu_regs(); | |
3194 | vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; | |
3195 | vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; | |
3196 | if (MACHINE_HAS_VX) | |
3197 | current->thread.fpu.regs = vcpu->run->s.regs.vrs; | |
3198 | else | |
3199 | current->thread.fpu.regs = vcpu->run->s.regs.fprs; | |
3200 | current->thread.fpu.fpc = vcpu->run->s.regs.fpc; | |
3201 | if (test_fp_ctl(current->thread.fpu.fpc)) | |
3202 | /* User space provided an invalid FPC, let's clear it */ | |
3203 | current->thread.fpu.fpc = 0; | |
4e0b1ab7 FZ |
3204 | if (MACHINE_HAS_GS) { |
3205 | preempt_disable(); | |
3206 | __ctl_set_bit(2, 4); | |
3207 | if (current->thread.gs_cb) { | |
3208 | vcpu->arch.host_gscb = current->thread.gs_cb; | |
3209 | save_gs_cb(vcpu->arch.host_gscb); | |
3210 | } | |
3211 | if (vcpu->arch.gs_enabled) { | |
3212 | current->thread.gs_cb = (struct gs_cb *) | |
3213 | &vcpu->run->s.regs.gscb; | |
3214 | restore_gs_cb(current->thread.gs_cb); | |
3215 | } | |
3216 | preempt_enable(); | |
3217 | } | |
80cd8763 | 3218 | |
b028ee3e DH |
3219 | kvm_run->kvm_dirty_regs = 0; |
3220 | } | |
3221 | ||
3222 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
3223 | { | |
3224 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
3225 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
3226 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
3227 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
4287f247 | 3228 | kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu); |
b028ee3e DH |
3229 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; |
3230 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
3231 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
3232 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
3233 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
3234 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
3235 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
31d8b8d4 CB |
3236 | save_access_regs(vcpu->run->s.regs.acrs); |
3237 | restore_access_regs(vcpu->arch.host_acrs); | |
e1788bb9 CB |
3238 | /* Save guest register state */ |
3239 | save_fpu_regs(); | |
3240 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; | |
3241 | /* Restore will be done lazily at return */ | |
3242 | current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; | |
3243 | current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; | |
4e0b1ab7 FZ |
3244 | if (MACHINE_HAS_GS) { |
3245 | __ctl_set_bit(2, 4); | |
3246 | if (vcpu->arch.gs_enabled) | |
3247 | save_gs_cb(current->thread.gs_cb); | |
3248 | preempt_disable(); | |
3249 | current->thread.gs_cb = vcpu->arch.host_gscb; | |
3250 | restore_gs_cb(vcpu->arch.host_gscb); | |
3251 | preempt_enable(); | |
3252 | if (!vcpu->arch.host_gscb) | |
3253 | __ctl_clear_bit(2, 4); | |
3254 | vcpu->arch.host_gscb = NULL; | |
3255 | } | |
e1788bb9 | 3256 | |
b028ee3e DH |
3257 | } |
3258 | ||
b0c632db HC |
3259 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
3260 | { | |
8f2abe6a | 3261 | int rc; |
b0c632db HC |
3262 | sigset_t sigsaved; |
3263 | ||
460df4c1 PB |
3264 | if (kvm_run->immediate_exit) |
3265 | return -EINTR; | |
3266 | ||
27291e21 DH |
3267 | if (guestdbg_exit_pending(vcpu)) { |
3268 | kvm_s390_prepare_debug_exit(vcpu); | |
3269 | return 0; | |
3270 | } | |
3271 | ||
b0c632db HC |
3272 | if (vcpu->sigset_active) |
3273 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
3274 | ||
6352e4d2 DH |
3275 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
3276 | kvm_s390_vcpu_start(vcpu); | |
3277 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 3278 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
3279 | vcpu->vcpu_id); |
3280 | return -EINVAL; | |
3281 | } | |
b0c632db | 3282 | |
b028ee3e | 3283 | sync_regs(vcpu, kvm_run); |
db0758b2 | 3284 | enable_cpu_timer_accounting(vcpu); |
d7b0b5eb | 3285 | |
dab4079d | 3286 | might_fault(); |
a76ccff6 | 3287 | rc = __vcpu_run(vcpu); |
9ace903d | 3288 | |
b1d16c49 CE |
3289 | if (signal_pending(current) && !rc) { |
3290 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 3291 | rc = -EINTR; |
b1d16c49 | 3292 | } |
8f2abe6a | 3293 | |
27291e21 DH |
3294 | if (guestdbg_exit_pending(vcpu) && !rc) { |
3295 | kvm_s390_prepare_debug_exit(vcpu); | |
3296 | rc = 0; | |
3297 | } | |
3298 | ||
8f2abe6a | 3299 | if (rc == -EREMOTE) { |
71f116bf | 3300 | /* userspace support is needed, kvm_run has been prepared */ |
8f2abe6a CB |
3301 | rc = 0; |
3302 | } | |
b0c632db | 3303 | |
db0758b2 | 3304 | disable_cpu_timer_accounting(vcpu); |
b028ee3e | 3305 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 3306 | |
b0c632db HC |
3307 | if (vcpu->sigset_active) |
3308 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
3309 | ||
b0c632db | 3310 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 3311 | return rc; |
b0c632db HC |
3312 | } |
3313 | ||
b0c632db HC |
3314 | /* |
3315 | * store status at address | |
3316 | * we use have two special cases: | |
3317 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
3318 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
3319 | */ | |
d0bce605 | 3320 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 3321 | { |
092670cd | 3322 | unsigned char archmode = 1; |
9abc2a08 | 3323 | freg_t fprs[NUM_FPRS]; |
fda902cb | 3324 | unsigned int px; |
4287f247 | 3325 | u64 clkcomp, cputm; |
d0bce605 | 3326 | int rc; |
b0c632db | 3327 | |
d9a3a09a | 3328 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 HC |
3329 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
3330 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 3331 | return -EFAULT; |
d9a3a09a | 3332 | gpa = 0; |
d0bce605 HC |
3333 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
3334 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 3335 | return -EFAULT; |
d9a3a09a MS |
3336 | gpa = px; |
3337 | } else | |
3338 | gpa -= __LC_FPREGS_SAVE_AREA; | |
9abc2a08 DH |
3339 | |
3340 | /* manually convert vector registers if necessary */ | |
3341 | if (MACHINE_HAS_VX) { | |
9522b37f | 3342 | convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); |
9abc2a08 DH |
3343 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, |
3344 | fprs, 128); | |
3345 | } else { | |
3346 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, | |
6fd8e67d | 3347 | vcpu->run->s.regs.fprs, 128); |
9abc2a08 | 3348 | } |
d9a3a09a | 3349 | rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA, |
d0bce605 | 3350 | vcpu->run->s.regs.gprs, 128); |
d9a3a09a | 3351 | rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA, |
d0bce605 | 3352 | &vcpu->arch.sie_block->gpsw, 16); |
d9a3a09a | 3353 | rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA, |
fda902cb | 3354 | &px, 4); |
d9a3a09a | 3355 | rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA, |
9abc2a08 | 3356 | &vcpu->run->s.regs.fpc, 4); |
d9a3a09a | 3357 | rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA, |
d0bce605 | 3358 | &vcpu->arch.sie_block->todpr, 4); |
4287f247 | 3359 | cputm = kvm_s390_get_cpu_timer(vcpu); |
d9a3a09a | 3360 | rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA, |
4287f247 | 3361 | &cputm, 8); |
178bd789 | 3362 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d9a3a09a | 3363 | rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA, |
d0bce605 | 3364 | &clkcomp, 8); |
d9a3a09a | 3365 | rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA, |
d0bce605 | 3366 | &vcpu->run->s.regs.acrs, 64); |
d9a3a09a | 3367 | rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA, |
d0bce605 HC |
3368 | &vcpu->arch.sie_block->gcr, 128); |
3369 | return rc ? -EFAULT : 0; | |
b0c632db HC |
3370 | } |
3371 | ||
e879892c TH |
3372 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
3373 | { | |
3374 | /* | |
3375 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
31d8b8d4 | 3376 | * switch in the run ioctl. Let's update our copies before we save |
e879892c TH |
3377 | * it into the save area |
3378 | */ | |
d0164ee2 | 3379 | save_fpu_regs(); |
9abc2a08 | 3380 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
e879892c TH |
3381 | save_access_regs(vcpu->run->s.regs.acrs); |
3382 | ||
3383 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
3384 | } | |
3385 | ||
8ad35755 DH |
3386 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
3387 | { | |
3388 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 3389 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
3390 | } |
3391 | ||
3392 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
3393 | { | |
3394 | unsigned int i; | |
3395 | struct kvm_vcpu *vcpu; | |
3396 | ||
3397 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
3398 | __disable_ibs_on_vcpu(vcpu); | |
3399 | } | |
3400 | } | |
3401 | ||
3402 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
3403 | { | |
09a400e7 DH |
3404 | if (!sclp.has_ibs) |
3405 | return; | |
8ad35755 | 3406 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); |
8e236546 | 3407 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
3408 | } |
3409 | ||
6852d7b6 DH |
3410 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
3411 | { | |
8ad35755 DH |
3412 | int i, online_vcpus, started_vcpus = 0; |
3413 | ||
3414 | if (!is_vcpu_stopped(vcpu)) | |
3415 | return; | |
3416 | ||
6852d7b6 | 3417 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 3418 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 3419 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
3420 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
3421 | ||
3422 | for (i = 0; i < online_vcpus; i++) { | |
3423 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
3424 | started_vcpus++; | |
3425 | } | |
3426 | ||
3427 | if (started_vcpus == 0) { | |
3428 | /* we're the only active VCPU -> speed it up */ | |
3429 | __enable_ibs_on_vcpu(vcpu); | |
3430 | } else if (started_vcpus == 1) { | |
3431 | /* | |
3432 | * As we are starting a second VCPU, we have to disable | |
3433 | * the IBS facility on all VCPUs to remove potentially | |
3434 | * oustanding ENABLE requests. | |
3435 | */ | |
3436 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
3437 | } | |
3438 | ||
805de8f4 | 3439 | atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
3440 | /* |
3441 | * Another VCPU might have used IBS while we were offline. | |
3442 | * Let's play safe and flush the VCPU at startup. | |
3443 | */ | |
d3d692c8 | 3444 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 3445 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 3446 | return; |
6852d7b6 DH |
3447 | } |
3448 | ||
3449 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
3450 | { | |
8ad35755 DH |
3451 | int i, online_vcpus, started_vcpus = 0; |
3452 | struct kvm_vcpu *started_vcpu = NULL; | |
3453 | ||
3454 | if (is_vcpu_stopped(vcpu)) | |
3455 | return; | |
3456 | ||
6852d7b6 | 3457 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 3458 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 3459 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
3460 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
3461 | ||
32f5ff63 | 3462 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 3463 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 3464 | |
805de8f4 | 3465 | atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
3466 | __disable_ibs_on_vcpu(vcpu); |
3467 | ||
3468 | for (i = 0; i < online_vcpus; i++) { | |
3469 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
3470 | started_vcpus++; | |
3471 | started_vcpu = vcpu->kvm->vcpus[i]; | |
3472 | } | |
3473 | } | |
3474 | ||
3475 | if (started_vcpus == 1) { | |
3476 | /* | |
3477 | * As we only have one VCPU left, we want to enable the | |
3478 | * IBS facility for that VCPU to speed it up. | |
3479 | */ | |
3480 | __enable_ibs_on_vcpu(started_vcpu); | |
3481 | } | |
3482 | ||
433b9ee4 | 3483 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 3484 | return; |
6852d7b6 DH |
3485 | } |
3486 | ||
d6712df9 CH |
3487 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
3488 | struct kvm_enable_cap *cap) | |
3489 | { | |
3490 | int r; | |
3491 | ||
3492 | if (cap->flags) | |
3493 | return -EINVAL; | |
3494 | ||
3495 | switch (cap->cap) { | |
fa6b7fe9 CH |
3496 | case KVM_CAP_S390_CSS_SUPPORT: |
3497 | if (!vcpu->kvm->arch.css_support) { | |
3498 | vcpu->kvm->arch.css_support = 1; | |
c92ea7b9 | 3499 | VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
fa6b7fe9 CH |
3500 | trace_kvm_s390_enable_css(vcpu->kvm); |
3501 | } | |
3502 | r = 0; | |
3503 | break; | |
d6712df9 CH |
3504 | default: |
3505 | r = -EINVAL; | |
3506 | break; | |
3507 | } | |
3508 | return r; | |
3509 | } | |
3510 | ||
41408c28 TH |
3511 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
3512 | struct kvm_s390_mem_op *mop) | |
3513 | { | |
3514 | void __user *uaddr = (void __user *)mop->buf; | |
3515 | void *tmpbuf = NULL; | |
3516 | int r, srcu_idx; | |
3517 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
3518 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
3519 | ||
3520 | if (mop->flags & ~supported_flags) | |
3521 | return -EINVAL; | |
3522 | ||
3523 | if (mop->size > MEM_OP_MAX_SIZE) | |
3524 | return -E2BIG; | |
3525 | ||
3526 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
3527 | tmpbuf = vmalloc(mop->size); | |
3528 | if (!tmpbuf) | |
3529 | return -ENOMEM; | |
3530 | } | |
3531 | ||
3532 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
3533 | ||
3534 | switch (mop->op) { | |
3535 | case KVM_S390_MEMOP_LOGICAL_READ: | |
3536 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
3537 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
3538 | mop->size, GACC_FETCH); | |
41408c28 TH |
3539 | break; |
3540 | } | |
3541 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
3542 | if (r == 0) { | |
3543 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
3544 | r = -EFAULT; | |
3545 | } | |
3546 | break; | |
3547 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
3548 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
3549 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
3550 | mop->size, GACC_STORE); | |
41408c28 TH |
3551 | break; |
3552 | } | |
3553 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
3554 | r = -EFAULT; | |
3555 | break; | |
3556 | } | |
3557 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
3558 | break; | |
3559 | default: | |
3560 | r = -EINVAL; | |
3561 | } | |
3562 | ||
3563 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
3564 | ||
3565 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
3566 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
3567 | ||
3568 | vfree(tmpbuf); | |
3569 | return r; | |
3570 | } | |
3571 | ||
b0c632db HC |
3572 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3573 | unsigned int ioctl, unsigned long arg) | |
3574 | { | |
3575 | struct kvm_vcpu *vcpu = filp->private_data; | |
3576 | void __user *argp = (void __user *)arg; | |
800c1065 | 3577 | int idx; |
bc923cc9 | 3578 | long r; |
b0c632db | 3579 | |
93736624 | 3580 | switch (ioctl) { |
47b43c52 JF |
3581 | case KVM_S390_IRQ: { |
3582 | struct kvm_s390_irq s390irq; | |
3583 | ||
3584 | r = -EFAULT; | |
3585 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
3586 | break; | |
3587 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
3588 | break; | |
3589 | } | |
93736624 | 3590 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 3591 | struct kvm_s390_interrupt s390int; |
383d0b05 | 3592 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 3593 | |
93736624 | 3594 | r = -EFAULT; |
ba5c1e9b | 3595 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 3596 | break; |
383d0b05 JF |
3597 | if (s390int_to_s390irq(&s390int, &s390irq)) |
3598 | return -EINVAL; | |
3599 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 3600 | break; |
ba5c1e9b | 3601 | } |
b0c632db | 3602 | case KVM_S390_STORE_STATUS: |
800c1065 | 3603 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 3604 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 3605 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 3606 | break; |
b0c632db HC |
3607 | case KVM_S390_SET_INITIAL_PSW: { |
3608 | psw_t psw; | |
3609 | ||
bc923cc9 | 3610 | r = -EFAULT; |
b0c632db | 3611 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
3612 | break; |
3613 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
3614 | break; | |
b0c632db HC |
3615 | } |
3616 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
3617 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
3618 | break; | |
14eebd91 CO |
3619 | case KVM_SET_ONE_REG: |
3620 | case KVM_GET_ONE_REG: { | |
3621 | struct kvm_one_reg reg; | |
3622 | r = -EFAULT; | |
3623 | if (copy_from_user(®, argp, sizeof(reg))) | |
3624 | break; | |
3625 | if (ioctl == KVM_SET_ONE_REG) | |
3626 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
3627 | else | |
3628 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
3629 | break; | |
3630 | } | |
27e0393f CO |
3631 | #ifdef CONFIG_KVM_S390_UCONTROL |
3632 | case KVM_S390_UCAS_MAP: { | |
3633 | struct kvm_s390_ucas_mapping ucasmap; | |
3634 | ||
3635 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
3636 | r = -EFAULT; | |
3637 | break; | |
3638 | } | |
3639 | ||
3640 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
3641 | r = -EINVAL; | |
3642 | break; | |
3643 | } | |
3644 | ||
3645 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
3646 | ucasmap.vcpu_addr, ucasmap.length); | |
3647 | break; | |
3648 | } | |
3649 | case KVM_S390_UCAS_UNMAP: { | |
3650 | struct kvm_s390_ucas_mapping ucasmap; | |
3651 | ||
3652 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
3653 | r = -EFAULT; | |
3654 | break; | |
3655 | } | |
3656 | ||
3657 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
3658 | r = -EINVAL; | |
3659 | break; | |
3660 | } | |
3661 | ||
3662 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
3663 | ucasmap.length); | |
3664 | break; | |
3665 | } | |
3666 | #endif | |
ccc7910f | 3667 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 3668 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
3669 | break; |
3670 | } | |
d6712df9 CH |
3671 | case KVM_ENABLE_CAP: |
3672 | { | |
3673 | struct kvm_enable_cap cap; | |
3674 | r = -EFAULT; | |
3675 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3676 | break; | |
3677 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3678 | break; | |
3679 | } | |
41408c28 TH |
3680 | case KVM_S390_MEM_OP: { |
3681 | struct kvm_s390_mem_op mem_op; | |
3682 | ||
3683 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
3684 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
3685 | else | |
3686 | r = -EFAULT; | |
3687 | break; | |
3688 | } | |
816c7667 JF |
3689 | case KVM_S390_SET_IRQ_STATE: { |
3690 | struct kvm_s390_irq_state irq_state; | |
3691 | ||
3692 | r = -EFAULT; | |
3693 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
3694 | break; | |
3695 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
3696 | irq_state.len == 0 || | |
3697 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
3698 | r = -EINVAL; | |
3699 | break; | |
3700 | } | |
3701 | r = kvm_s390_set_irq_state(vcpu, | |
3702 | (void __user *) irq_state.buf, | |
3703 | irq_state.len); | |
3704 | break; | |
3705 | } | |
3706 | case KVM_S390_GET_IRQ_STATE: { | |
3707 | struct kvm_s390_irq_state irq_state; | |
3708 | ||
3709 | r = -EFAULT; | |
3710 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
3711 | break; | |
3712 | if (irq_state.len == 0) { | |
3713 | r = -EINVAL; | |
3714 | break; | |
3715 | } | |
3716 | r = kvm_s390_get_irq_state(vcpu, | |
3717 | (__u8 __user *) irq_state.buf, | |
3718 | irq_state.len); | |
3719 | break; | |
3720 | } | |
b0c632db | 3721 | default: |
3e6afcf1 | 3722 | r = -ENOTTY; |
b0c632db | 3723 | } |
bc923cc9 | 3724 | return r; |
b0c632db HC |
3725 | } |
3726 | ||
5b1c1493 CO |
3727 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3728 | { | |
3729 | #ifdef CONFIG_KVM_S390_UCONTROL | |
3730 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
3731 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
3732 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
3733 | get_page(vmf->page); | |
3734 | return 0; | |
3735 | } | |
3736 | #endif | |
3737 | return VM_FAULT_SIGBUS; | |
3738 | } | |
3739 | ||
5587027c AK |
3740 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
3741 | unsigned long npages) | |
db3fe4eb TY |
3742 | { |
3743 | return 0; | |
3744 | } | |
3745 | ||
b0c632db | 3746 | /* Section: memory related */ |
f7784b8e MT |
3747 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
3748 | struct kvm_memory_slot *memslot, | |
09170a49 | 3749 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 3750 | enum kvm_mr_change change) |
b0c632db | 3751 | { |
dd2887e7 NW |
3752 | /* A few sanity checks. We can have memory slots which have to be |
3753 | located/ended at a segment boundary (1MB). The memory in userland is | |
3754 | ok to be fragmented into various different vmas. It is okay to mmap() | |
3755 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 3756 | |
598841ca | 3757 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
3758 | return -EINVAL; |
3759 | ||
598841ca | 3760 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
3761 | return -EINVAL; |
3762 | ||
a3a92c31 DD |
3763 | if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit) |
3764 | return -EINVAL; | |
3765 | ||
f7784b8e MT |
3766 | return 0; |
3767 | } | |
3768 | ||
3769 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 3770 | const struct kvm_userspace_memory_region *mem, |
8482644a | 3771 | const struct kvm_memory_slot *old, |
f36f3f28 | 3772 | const struct kvm_memory_slot *new, |
8482644a | 3773 | enum kvm_mr_change change) |
f7784b8e | 3774 | { |
f7850c92 | 3775 | int rc; |
f7784b8e | 3776 | |
2cef4deb CB |
3777 | /* If the basics of the memslot do not change, we do not want |
3778 | * to update the gmap. Every update causes several unnecessary | |
3779 | * segment translation exceptions. This is usually handled just | |
3780 | * fine by the normal fault handler + gmap, but it will also | |
3781 | * cause faults on the prefix page of running guest CPUs. | |
3782 | */ | |
3783 | if (old->userspace_addr == mem->userspace_addr && | |
3784 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
3785 | old->npages * PAGE_SIZE == mem->memory_size) | |
3786 | return; | |
598841ca CO |
3787 | |
3788 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
3789 | mem->guest_phys_addr, mem->memory_size); | |
3790 | if (rc) | |
ea2cdd27 | 3791 | pr_warn("failed to commit memory region\n"); |
598841ca | 3792 | return; |
b0c632db HC |
3793 | } |
3794 | ||
60a37709 AY |
3795 | static inline unsigned long nonhyp_mask(int i) |
3796 | { | |
3797 | unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30; | |
3798 | ||
3799 | return 0x0000ffffffffffffUL >> (nonhyp_fai << 4); | |
3800 | } | |
3801 | ||
3491caf2 CB |
3802 | void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) |
3803 | { | |
3804 | vcpu->valid_wakeup = false; | |
3805 | } | |
3806 | ||
b0c632db HC |
3807 | static int __init kvm_s390_init(void) |
3808 | { | |
60a37709 AY |
3809 | int i; |
3810 | ||
07197fd0 DH |
3811 | if (!sclp.has_sief2) { |
3812 | pr_info("SIE not available\n"); | |
3813 | return -ENODEV; | |
3814 | } | |
3815 | ||
60a37709 AY |
3816 | for (i = 0; i < 16; i++) |
3817 | kvm_s390_fac_list_mask[i] |= | |
3818 | S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i); | |
3819 | ||
9d8d5786 | 3820 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
3821 | } |
3822 | ||
3823 | static void __exit kvm_s390_exit(void) | |
3824 | { | |
3825 | kvm_exit(); | |
3826 | } | |
3827 | ||
3828 | module_init(kvm_s390_init); | |
3829 | module_exit(kvm_s390_exit); | |
566af940 CH |
3830 | |
3831 | /* | |
3832 | * Enable autoloading of the kvm module. | |
3833 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
3834 | * since x86 takes a different approach. | |
3835 | */ | |
3836 | #include <linux/miscdevice.h> | |
3837 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
3838 | MODULE_ALIAS("devname:kvm"); |