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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 IM |
32 | #include <linux/sched/signal.h> |
33 | ||
cbb870c8 | 34 | #include <asm/asm-offsets.h> |
b0c632db | 35 | #include <asm/lowcore.h> |
fd5ada04 | 36 | #include <asm/stp.h> |
b0c632db | 37 | #include <asm/pgtable.h> |
1e133ab2 | 38 | #include <asm/gmap.h> |
f5daba1d | 39 | #include <asm/nmi.h> |
a0616cde | 40 | #include <asm/switch_to.h> |
6d3da241 | 41 | #include <asm/isc.h> |
1526bf9c | 42 | #include <asm/sclp.h> |
0a763c78 | 43 | #include <asm/cpacf.h> |
221bb8a4 | 44 | #include <asm/timex.h> |
8f2abe6a | 45 | #include "kvm-s390.h" |
b0c632db HC |
46 | #include "gaccess.h" |
47 | ||
ea2cdd27 DH |
48 | #define KMSG_COMPONENT "kvm-s390" |
49 | #undef pr_fmt | |
50 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
51 | ||
5786fffa CH |
52 | #define CREATE_TRACE_POINTS |
53 | #include "trace.h" | |
ade38c31 | 54 | #include "trace-s390.h" |
5786fffa | 55 | |
41408c28 | 56 | #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
816c7667 JF |
57 | #define LOCAL_IRQS 32 |
58 | #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ | |
59 | (KVM_MAX_VCPUS + LOCAL_IRQS)) | |
41408c28 | 60 | |
b0c632db HC |
61 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
62 | ||
63 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
64 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 65 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
66 | { "exit_validity", VCPU_STAT(exit_validity) }, |
67 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
68 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
69 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b | 70 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
9ec6de19 | 71 | { "exit_pei", VCPU_STAT(exit_pei) }, |
ba5c1e9b CO |
72 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, |
73 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
a011eeb2 | 74 | { "exit_operation_exception", VCPU_STAT(exit_operation_exception) }, |
f7819512 | 75 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 76 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 77 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ce2e4f0b | 78 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 79 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 80 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
81 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
82 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 83 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 84 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
85 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
86 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
87 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
88 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
89 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
90 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
91 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 92 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
93 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
94 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
95 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
96 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
97 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 98 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
99 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
100 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 101 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
102 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
103 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 104 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
95ca2cb5 | 105 | { "instruction_sthyi", VCPU_STAT(instruction_sthyi) }, |
a3508fbe | 106 | { "instruction_sie", VCPU_STAT(instruction_sie) }, |
5288fbf0 | 107 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 108 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 109 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 110 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
111 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
112 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 113 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
114 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
115 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 116 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
117 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
118 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
119 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
120 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
121 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
122 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 123 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 124 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 125 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
175a5c9e CB |
126 | { "diagnose_258", VCPU_STAT(diagnose_258) }, |
127 | { "diagnose_308", VCPU_STAT(diagnose_308) }, | |
128 | { "diagnose_500", VCPU_STAT(diagnose_500) }, | |
b0c632db HC |
129 | { NULL } |
130 | }; | |
131 | ||
a411edf1 DH |
132 | /* allow nested virtualization in KVM (if enabled by user space) */ |
133 | static int nested; | |
134 | module_param(nested, int, S_IRUGO); | |
135 | MODULE_PARM_DESC(nested, "Nested virtualization support"); | |
136 | ||
9d8d5786 | 137 | /* upper facilities limit for kvm */ |
f6c1d359 | 138 | unsigned long kvm_s390_fac_list_mask[16] = { FACILITIES_KVM }; |
b0c632db | 139 | |
9d8d5786 | 140 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 141 | { |
9d8d5786 MM |
142 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
143 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
144 | } |
145 | ||
15c9705f DH |
146 | /* available cpu features supported by kvm */ |
147 | static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); | |
0a763c78 DH |
148 | /* available subfunctions indicated via query / "test bit" */ |
149 | static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc; | |
15c9705f | 150 | |
9d8d5786 | 151 | static struct gmap_notifier gmap_notifier; |
a3508fbe | 152 | static struct gmap_notifier vsie_gmap_notifier; |
78f26131 | 153 | debug_info_t *kvm_s390_dbf; |
9d8d5786 | 154 | |
b0c632db | 155 | /* Section: not file related */ |
13a34e06 | 156 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
157 | { |
158 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 159 | return 0; |
b0c632db HC |
160 | } |
161 | ||
414d3b07 MS |
162 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
163 | unsigned long end); | |
2c70fe44 | 164 | |
fdf03650 FZ |
165 | /* |
166 | * This callback is executed during stop_machine(). All CPUs are therefore | |
167 | * temporarily stopped. In order not to change guest behavior, we have to | |
168 | * disable preemption whenever we touch the epoch of kvm and the VCPUs, | |
169 | * so a CPU won't be stopped while calculating with the epoch. | |
170 | */ | |
171 | static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, | |
172 | void *v) | |
173 | { | |
174 | struct kvm *kvm; | |
175 | struct kvm_vcpu *vcpu; | |
176 | int i; | |
177 | unsigned long long *delta = v; | |
178 | ||
179 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
180 | kvm->arch.epoch -= *delta; | |
181 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
182 | vcpu->arch.sie_block->epoch -= *delta; | |
db0758b2 DH |
183 | if (vcpu->arch.cputm_enabled) |
184 | vcpu->arch.cputm_start += *delta; | |
91473b48 DH |
185 | if (vcpu->arch.vsie_block) |
186 | vcpu->arch.vsie_block->epoch -= *delta; | |
fdf03650 FZ |
187 | } |
188 | } | |
189 | return NOTIFY_OK; | |
190 | } | |
191 | ||
192 | static struct notifier_block kvm_clock_notifier = { | |
193 | .notifier_call = kvm_clock_sync, | |
194 | }; | |
195 | ||
b0c632db HC |
196 | int kvm_arch_hardware_setup(void) |
197 | { | |
2c70fe44 | 198 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
b2d73b2a | 199 | gmap_register_pte_notifier(&gmap_notifier); |
a3508fbe DH |
200 | vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier; |
201 | gmap_register_pte_notifier(&vsie_gmap_notifier); | |
fdf03650 FZ |
202 | atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
203 | &kvm_clock_notifier); | |
b0c632db HC |
204 | return 0; |
205 | } | |
206 | ||
207 | void kvm_arch_hardware_unsetup(void) | |
208 | { | |
b2d73b2a | 209 | gmap_unregister_pte_notifier(&gmap_notifier); |
a3508fbe | 210 | gmap_unregister_pte_notifier(&vsie_gmap_notifier); |
fdf03650 FZ |
211 | atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
212 | &kvm_clock_notifier); | |
b0c632db HC |
213 | } |
214 | ||
22be5a13 DH |
215 | static void allow_cpu_feat(unsigned long nr) |
216 | { | |
217 | set_bit_inv(nr, kvm_s390_available_cpu_feat); | |
218 | } | |
219 | ||
0a763c78 DH |
220 | static inline int plo_test_bit(unsigned char nr) |
221 | { | |
222 | register unsigned long r0 asm("0") = (unsigned long) nr | 0x100; | |
d051ae53 | 223 | int cc; |
0a763c78 DH |
224 | |
225 | asm volatile( | |
226 | /* Parameter registers are ignored for "test bit" */ | |
227 | " plo 0,0,0,0(0)\n" | |
228 | " ipm %0\n" | |
229 | " srl %0,28\n" | |
230 | : "=d" (cc) | |
231 | : "d" (r0) | |
232 | : "cc"); | |
233 | return cc == 0; | |
234 | } | |
235 | ||
22be5a13 DH |
236 | static void kvm_s390_cpu_feat_init(void) |
237 | { | |
0a763c78 DH |
238 | int i; |
239 | ||
240 | for (i = 0; i < 256; ++i) { | |
241 | if (plo_test_bit(i)) | |
242 | kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7); | |
243 | } | |
244 | ||
245 | if (test_facility(28)) /* TOD-clock steering */ | |
221bb8a4 LT |
246 | ptff(kvm_s390_available_subfunc.ptff, |
247 | sizeof(kvm_s390_available_subfunc.ptff), | |
248 | PTFF_QAF); | |
0a763c78 DH |
249 | |
250 | if (test_facility(17)) { /* MSA */ | |
69c0e360 MS |
251 | __cpacf_query(CPACF_KMAC, (cpacf_mask_t *) |
252 | kvm_s390_available_subfunc.kmac); | |
253 | __cpacf_query(CPACF_KMC, (cpacf_mask_t *) | |
254 | kvm_s390_available_subfunc.kmc); | |
255 | __cpacf_query(CPACF_KM, (cpacf_mask_t *) | |
256 | kvm_s390_available_subfunc.km); | |
257 | __cpacf_query(CPACF_KIMD, (cpacf_mask_t *) | |
258 | kvm_s390_available_subfunc.kimd); | |
259 | __cpacf_query(CPACF_KLMD, (cpacf_mask_t *) | |
260 | kvm_s390_available_subfunc.klmd); | |
0a763c78 DH |
261 | } |
262 | if (test_facility(76)) /* MSA3 */ | |
69c0e360 MS |
263 | __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *) |
264 | kvm_s390_available_subfunc.pckmo); | |
0a763c78 | 265 | if (test_facility(77)) { /* MSA4 */ |
69c0e360 MS |
266 | __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *) |
267 | kvm_s390_available_subfunc.kmctr); | |
268 | __cpacf_query(CPACF_KMF, (cpacf_mask_t *) | |
269 | kvm_s390_available_subfunc.kmf); | |
270 | __cpacf_query(CPACF_KMO, (cpacf_mask_t *) | |
271 | kvm_s390_available_subfunc.kmo); | |
272 | __cpacf_query(CPACF_PCC, (cpacf_mask_t *) | |
273 | kvm_s390_available_subfunc.pcc); | |
0a763c78 DH |
274 | } |
275 | if (test_facility(57)) /* MSA5 */ | |
985a9d20 | 276 | __cpacf_query(CPACF_PRNO, (cpacf_mask_t *) |
69c0e360 | 277 | kvm_s390_available_subfunc.ppno); |
0a763c78 | 278 | |
22be5a13 DH |
279 | if (MACHINE_HAS_ESOP) |
280 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP); | |
a3508fbe DH |
281 | /* |
282 | * We need SIE support, ESOP (PROT_READ protection for gmap_shadow), | |
283 | * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing). | |
284 | */ | |
285 | if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao || | |
a411edf1 | 286 | !test_facility(3) || !nested) |
a3508fbe DH |
287 | return; |
288 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2); | |
19c439b5 DH |
289 | if (sclp.has_64bscao) |
290 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO); | |
0615a326 DH |
291 | if (sclp.has_siif) |
292 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF); | |
77d18f6d DH |
293 | if (sclp.has_gpere) |
294 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE); | |
a1b7b9b2 DH |
295 | if (sclp.has_gsls) |
296 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS); | |
5630a8e8 DH |
297 | if (sclp.has_ib) |
298 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB); | |
13ee3f67 DH |
299 | if (sclp.has_cei) |
300 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI); | |
7fd7f39d DH |
301 | if (sclp.has_ibs) |
302 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS); | |
5d3876a8 DH |
303 | /* |
304 | * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make | |
305 | * all skey handling functions read/set the skey from the PGSTE | |
306 | * instead of the real storage key. | |
307 | * | |
308 | * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make | |
309 | * pages being detected as preserved although they are resident. | |
310 | * | |
311 | * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will | |
312 | * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY. | |
313 | * | |
314 | * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and | |
315 | * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be | |
316 | * correctly shadowed. We can do that for the PGSTE but not for PTE.I. | |
317 | * | |
318 | * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We | |
319 | * cannot easily shadow the SCA because of the ipte lock. | |
320 | */ | |
22be5a13 DH |
321 | } |
322 | ||
b0c632db HC |
323 | int kvm_arch_init(void *opaque) |
324 | { | |
78f26131 CB |
325 | kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
326 | if (!kvm_s390_dbf) | |
327 | return -ENOMEM; | |
328 | ||
329 | if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) { | |
330 | debug_unregister(kvm_s390_dbf); | |
331 | return -ENOMEM; | |
332 | } | |
333 | ||
22be5a13 DH |
334 | kvm_s390_cpu_feat_init(); |
335 | ||
84877d93 CH |
336 | /* Register floating interrupt controller interface. */ |
337 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
338 | } |
339 | ||
78f26131 CB |
340 | void kvm_arch_exit(void) |
341 | { | |
342 | debug_unregister(kvm_s390_dbf); | |
343 | } | |
344 | ||
b0c632db HC |
345 | /* Section: device related */ |
346 | long kvm_arch_dev_ioctl(struct file *filp, | |
347 | unsigned int ioctl, unsigned long arg) | |
348 | { | |
349 | if (ioctl == KVM_S390_ENABLE_SIE) | |
350 | return s390_enable_sie(); | |
351 | return -EINVAL; | |
352 | } | |
353 | ||
784aa3d7 | 354 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 355 | { |
d7b0b5eb CO |
356 | int r; |
357 | ||
2bd0ac4e | 358 | switch (ext) { |
d7b0b5eb | 359 | case KVM_CAP_S390_PSW: |
b6cf8788 | 360 | case KVM_CAP_S390_GMAP: |
52e16b18 | 361 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
362 | #ifdef CONFIG_KVM_S390_UCONTROL |
363 | case KVM_CAP_S390_UCONTROL: | |
364 | #endif | |
3c038e6b | 365 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 366 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 367 | case KVM_CAP_ONE_REG: |
d6712df9 | 368 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 369 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 370 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 371 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 372 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 373 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 374 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 375 | case KVM_CAP_MP_STATE: |
460df4c1 | 376 | case KVM_CAP_IMMEDIATE_EXIT: |
47b43c52 | 377 | case KVM_CAP_S390_INJECT_IRQ: |
2444b352 | 378 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 379 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 380 | case KVM_CAP_S390_SKEYS: |
816c7667 | 381 | case KVM_CAP_S390_IRQ_STATE: |
6502a34c | 382 | case KVM_CAP_S390_USER_INSTR0: |
d7b0b5eb CO |
383 | r = 1; |
384 | break; | |
41408c28 TH |
385 | case KVM_CAP_S390_MEM_OP: |
386 | r = MEM_OP_MAX_SIZE; | |
387 | break; | |
e726b1bd CB |
388 | case KVM_CAP_NR_VCPUS: |
389 | case KVM_CAP_MAX_VCPUS: | |
76a6dd72 | 390 | r = KVM_S390_BSCA_CPU_SLOTS; |
a6940674 DH |
391 | if (!kvm_s390_use_sca_entries()) |
392 | r = KVM_MAX_VCPUS; | |
393 | else if (sclp.has_esca && sclp.has_64bscao) | |
76a6dd72 | 394 | r = KVM_S390_ESCA_CPU_SLOTS; |
e726b1bd | 395 | break; |
e1e2e605 NW |
396 | case KVM_CAP_NR_MEMSLOTS: |
397 | r = KVM_USER_MEM_SLOTS; | |
398 | break; | |
1526bf9c | 399 | case KVM_CAP_S390_COW: |
abf09bed | 400 | r = MACHINE_HAS_ESOP; |
1526bf9c | 401 | break; |
68c55750 EF |
402 | case KVM_CAP_S390_VECTOR_REGISTERS: |
403 | r = MACHINE_HAS_VX; | |
404 | break; | |
c6e5f166 FZ |
405 | case KVM_CAP_S390_RI: |
406 | r = test_facility(64); | |
407 | break; | |
2bd0ac4e | 408 | default: |
d7b0b5eb | 409 | r = 0; |
2bd0ac4e | 410 | } |
d7b0b5eb | 411 | return r; |
b0c632db HC |
412 | } |
413 | ||
15f36ebd JH |
414 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
415 | struct kvm_memory_slot *memslot) | |
416 | { | |
417 | gfn_t cur_gfn, last_gfn; | |
418 | unsigned long address; | |
419 | struct gmap *gmap = kvm->arch.gmap; | |
420 | ||
15f36ebd JH |
421 | /* Loop over all guest pages */ |
422 | last_gfn = memslot->base_gfn + memslot->npages; | |
423 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
424 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
425 | ||
1e133ab2 | 426 | if (test_and_clear_guest_dirty(gmap->mm, address)) |
15f36ebd | 427 | mark_page_dirty(kvm, cur_gfn); |
1763f8d0 CB |
428 | if (fatal_signal_pending(current)) |
429 | return; | |
70c88a00 | 430 | cond_resched(); |
15f36ebd | 431 | } |
15f36ebd JH |
432 | } |
433 | ||
b0c632db | 434 | /* Section: vm related */ |
a6e2f683 ED |
435 | static void sca_del_vcpu(struct kvm_vcpu *vcpu); |
436 | ||
b0c632db HC |
437 | /* |
438 | * Get (and clear) the dirty memory log for a memory slot. | |
439 | */ | |
440 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
441 | struct kvm_dirty_log *log) | |
442 | { | |
15f36ebd JH |
443 | int r; |
444 | unsigned long n; | |
9f6b8029 | 445 | struct kvm_memslots *slots; |
15f36ebd JH |
446 | struct kvm_memory_slot *memslot; |
447 | int is_dirty = 0; | |
448 | ||
e1e8a962 JF |
449 | if (kvm_is_ucontrol(kvm)) |
450 | return -EINVAL; | |
451 | ||
15f36ebd JH |
452 | mutex_lock(&kvm->slots_lock); |
453 | ||
454 | r = -EINVAL; | |
455 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
456 | goto out; | |
457 | ||
9f6b8029 PB |
458 | slots = kvm_memslots(kvm); |
459 | memslot = id_to_memslot(slots, log->slot); | |
15f36ebd JH |
460 | r = -ENOENT; |
461 | if (!memslot->dirty_bitmap) | |
462 | goto out; | |
463 | ||
464 | kvm_s390_sync_dirty_log(kvm, memslot); | |
465 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
466 | if (r) | |
467 | goto out; | |
468 | ||
469 | /* Clear the dirty log */ | |
470 | if (is_dirty) { | |
471 | n = kvm_dirty_bitmap_bytes(memslot); | |
472 | memset(memslot->dirty_bitmap, 0, n); | |
473 | } | |
474 | r = 0; | |
475 | out: | |
476 | mutex_unlock(&kvm->slots_lock); | |
477 | return r; | |
b0c632db HC |
478 | } |
479 | ||
6502a34c DH |
480 | static void icpt_operexc_on_all_vcpus(struct kvm *kvm) |
481 | { | |
482 | unsigned int i; | |
483 | struct kvm_vcpu *vcpu; | |
484 | ||
485 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
486 | kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu); | |
487 | } | |
488 | } | |
489 | ||
d938dc55 CH |
490 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
491 | { | |
492 | int r; | |
493 | ||
494 | if (cap->flags) | |
495 | return -EINVAL; | |
496 | ||
497 | switch (cap->cap) { | |
84223598 | 498 | case KVM_CAP_S390_IRQCHIP: |
c92ea7b9 | 499 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
84223598 CH |
500 | kvm->arch.use_irqchip = 1; |
501 | r = 0; | |
502 | break; | |
2444b352 | 503 | case KVM_CAP_S390_USER_SIGP: |
c92ea7b9 | 504 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
2444b352 DH |
505 | kvm->arch.user_sigp = 1; |
506 | r = 0; | |
507 | break; | |
68c55750 | 508 | case KVM_CAP_S390_VECTOR_REGISTERS: |
5967c17b | 509 | mutex_lock(&kvm->lock); |
a03825bb | 510 | if (kvm->created_vcpus) { |
5967c17b DH |
511 | r = -EBUSY; |
512 | } else if (MACHINE_HAS_VX) { | |
c54f0d6a DH |
513 | set_kvm_facility(kvm->arch.model.fac_mask, 129); |
514 | set_kvm_facility(kvm->arch.model.fac_list, 129); | |
2f87d942 GH |
515 | if (test_facility(134)) { |
516 | set_kvm_facility(kvm->arch.model.fac_mask, 134); | |
517 | set_kvm_facility(kvm->arch.model.fac_list, 134); | |
518 | } | |
53743aa7 MS |
519 | if (test_facility(135)) { |
520 | set_kvm_facility(kvm->arch.model.fac_mask, 135); | |
521 | set_kvm_facility(kvm->arch.model.fac_list, 135); | |
522 | } | |
18280d8b MM |
523 | r = 0; |
524 | } else | |
525 | r = -EINVAL; | |
5967c17b | 526 | mutex_unlock(&kvm->lock); |
c92ea7b9 CB |
527 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
528 | r ? "(not available)" : "(success)"); | |
68c55750 | 529 | break; |
c6e5f166 FZ |
530 | case KVM_CAP_S390_RI: |
531 | r = -EINVAL; | |
532 | mutex_lock(&kvm->lock); | |
a03825bb | 533 | if (kvm->created_vcpus) { |
c6e5f166 FZ |
534 | r = -EBUSY; |
535 | } else if (test_facility(64)) { | |
c54f0d6a DH |
536 | set_kvm_facility(kvm->arch.model.fac_mask, 64); |
537 | set_kvm_facility(kvm->arch.model.fac_list, 64); | |
c6e5f166 FZ |
538 | r = 0; |
539 | } | |
540 | mutex_unlock(&kvm->lock); | |
541 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s", | |
542 | r ? "(not available)" : "(success)"); | |
543 | break; | |
e44fc8c9 | 544 | case KVM_CAP_S390_USER_STSI: |
c92ea7b9 | 545 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
e44fc8c9 ET |
546 | kvm->arch.user_stsi = 1; |
547 | r = 0; | |
548 | break; | |
6502a34c DH |
549 | case KVM_CAP_S390_USER_INSTR0: |
550 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0"); | |
551 | kvm->arch.user_instr0 = 1; | |
552 | icpt_operexc_on_all_vcpus(kvm); | |
553 | r = 0; | |
554 | break; | |
d938dc55 CH |
555 | default: |
556 | r = -EINVAL; | |
557 | break; | |
558 | } | |
559 | return r; | |
560 | } | |
561 | ||
8c0a7ce6 DD |
562 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
563 | { | |
564 | int ret; | |
565 | ||
566 | switch (attr->attr) { | |
567 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
568 | ret = 0; | |
c92ea7b9 | 569 | VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
a3a92c31 DD |
570 | kvm->arch.mem_limit); |
571 | if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr)) | |
8c0a7ce6 DD |
572 | ret = -EFAULT; |
573 | break; | |
574 | default: | |
575 | ret = -ENXIO; | |
576 | break; | |
577 | } | |
578 | return ret; | |
579 | } | |
580 | ||
581 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
582 | { |
583 | int ret; | |
584 | unsigned int idx; | |
585 | switch (attr->attr) { | |
586 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
f9cbd9b0 | 587 | ret = -ENXIO; |
c24cc9c8 | 588 | if (!sclp.has_cmma) |
e6db1d61 DD |
589 | break; |
590 | ||
4f718eab | 591 | ret = -EBUSY; |
c92ea7b9 | 592 | VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
4f718eab | 593 | mutex_lock(&kvm->lock); |
a03825bb | 594 | if (!kvm->created_vcpus) { |
4f718eab DD |
595 | kvm->arch.use_cmma = 1; |
596 | ret = 0; | |
597 | } | |
598 | mutex_unlock(&kvm->lock); | |
599 | break; | |
600 | case KVM_S390_VM_MEM_CLR_CMMA: | |
f9cbd9b0 DH |
601 | ret = -ENXIO; |
602 | if (!sclp.has_cmma) | |
603 | break; | |
c3489155 DD |
604 | ret = -EINVAL; |
605 | if (!kvm->arch.use_cmma) | |
606 | break; | |
607 | ||
c92ea7b9 | 608 | VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
4f718eab DD |
609 | mutex_lock(&kvm->lock); |
610 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 611 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
612 | srcu_read_unlock(&kvm->srcu, idx); |
613 | mutex_unlock(&kvm->lock); | |
614 | ret = 0; | |
615 | break; | |
8c0a7ce6 DD |
616 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
617 | unsigned long new_limit; | |
618 | ||
619 | if (kvm_is_ucontrol(kvm)) | |
620 | return -EINVAL; | |
621 | ||
622 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
623 | return -EFAULT; | |
624 | ||
a3a92c31 DD |
625 | if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT && |
626 | new_limit > kvm->arch.mem_limit) | |
8c0a7ce6 DD |
627 | return -E2BIG; |
628 | ||
a3a92c31 DD |
629 | if (!new_limit) |
630 | return -EINVAL; | |
631 | ||
6ea427bb | 632 | /* gmap_create takes last usable address */ |
a3a92c31 DD |
633 | if (new_limit != KVM_S390_NO_MEM_LIMIT) |
634 | new_limit -= 1; | |
635 | ||
8c0a7ce6 DD |
636 | ret = -EBUSY; |
637 | mutex_lock(&kvm->lock); | |
a03825bb | 638 | if (!kvm->created_vcpus) { |
6ea427bb MS |
639 | /* gmap_create will round the limit up */ |
640 | struct gmap *new = gmap_create(current->mm, new_limit); | |
8c0a7ce6 DD |
641 | |
642 | if (!new) { | |
643 | ret = -ENOMEM; | |
644 | } else { | |
6ea427bb | 645 | gmap_remove(kvm->arch.gmap); |
8c0a7ce6 DD |
646 | new->private = kvm; |
647 | kvm->arch.gmap = new; | |
648 | ret = 0; | |
649 | } | |
650 | } | |
651 | mutex_unlock(&kvm->lock); | |
a3a92c31 DD |
652 | VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit); |
653 | VM_EVENT(kvm, 3, "New guest asce: 0x%pK", | |
654 | (void *) kvm->arch.gmap->asce); | |
8c0a7ce6 DD |
655 | break; |
656 | } | |
4f718eab DD |
657 | default: |
658 | ret = -ENXIO; | |
659 | break; | |
660 | } | |
661 | return ret; | |
662 | } | |
663 | ||
a374e892 TK |
664 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
665 | ||
666 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
667 | { | |
668 | struct kvm_vcpu *vcpu; | |
669 | int i; | |
670 | ||
9d8d5786 | 671 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
672 | return -EINVAL; |
673 | ||
674 | mutex_lock(&kvm->lock); | |
675 | switch (attr->attr) { | |
676 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
677 | get_random_bytes( | |
678 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
679 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
680 | kvm->arch.crypto.aes_kw = 1; | |
c92ea7b9 | 681 | VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
a374e892 TK |
682 | break; |
683 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
684 | get_random_bytes( | |
685 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
686 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
687 | kvm->arch.crypto.dea_kw = 1; | |
c92ea7b9 | 688 | VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
a374e892 TK |
689 | break; |
690 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
691 | kvm->arch.crypto.aes_kw = 0; | |
692 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
693 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
c92ea7b9 | 694 | VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
a374e892 TK |
695 | break; |
696 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
697 | kvm->arch.crypto.dea_kw = 0; | |
698 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
699 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
c92ea7b9 | 700 | VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
a374e892 TK |
701 | break; |
702 | default: | |
703 | mutex_unlock(&kvm->lock); | |
704 | return -ENXIO; | |
705 | } | |
706 | ||
707 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
708 | kvm_s390_vcpu_crypto_setup(vcpu); | |
709 | exit_sie(vcpu); | |
710 | } | |
711 | mutex_unlock(&kvm->lock); | |
712 | return 0; | |
713 | } | |
714 | ||
72f25020 JH |
715 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
716 | { | |
717 | u8 gtod_high; | |
718 | ||
719 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
720 | sizeof(gtod_high))) | |
721 | return -EFAULT; | |
722 | ||
723 | if (gtod_high != 0) | |
724 | return -EINVAL; | |
58c383c6 | 725 | VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
726 | |
727 | return 0; | |
728 | } | |
729 | ||
730 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
731 | { | |
5a3d883a | 732 | u64 gtod; |
72f25020 JH |
733 | |
734 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
735 | return -EFAULT; | |
736 | ||
25ed1675 | 737 | kvm_s390_set_tod_clock(kvm, gtod); |
58c383c6 | 738 | VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod); |
72f25020 JH |
739 | return 0; |
740 | } | |
741 | ||
742 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
743 | { | |
744 | int ret; | |
745 | ||
746 | if (attr->flags) | |
747 | return -EINVAL; | |
748 | ||
749 | switch (attr->attr) { | |
750 | case KVM_S390_VM_TOD_HIGH: | |
751 | ret = kvm_s390_set_tod_high(kvm, attr); | |
752 | break; | |
753 | case KVM_S390_VM_TOD_LOW: | |
754 | ret = kvm_s390_set_tod_low(kvm, attr); | |
755 | break; | |
756 | default: | |
757 | ret = -ENXIO; | |
758 | break; | |
759 | } | |
760 | return ret; | |
761 | } | |
762 | ||
763 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
764 | { | |
765 | u8 gtod_high = 0; | |
766 | ||
767 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
768 | sizeof(gtod_high))) | |
769 | return -EFAULT; | |
58c383c6 | 770 | VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
771 | |
772 | return 0; | |
773 | } | |
774 | ||
775 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
776 | { | |
5a3d883a | 777 | u64 gtod; |
72f25020 | 778 | |
60417fcc | 779 | gtod = kvm_s390_get_tod_clock_fast(kvm); |
72f25020 JH |
780 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
781 | return -EFAULT; | |
58c383c6 | 782 | VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
72f25020 JH |
783 | |
784 | return 0; | |
785 | } | |
786 | ||
787 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
788 | { | |
789 | int ret; | |
790 | ||
791 | if (attr->flags) | |
792 | return -EINVAL; | |
793 | ||
794 | switch (attr->attr) { | |
795 | case KVM_S390_VM_TOD_HIGH: | |
796 | ret = kvm_s390_get_tod_high(kvm, attr); | |
797 | break; | |
798 | case KVM_S390_VM_TOD_LOW: | |
799 | ret = kvm_s390_get_tod_low(kvm, attr); | |
800 | break; | |
801 | default: | |
802 | ret = -ENXIO; | |
803 | break; | |
804 | } | |
805 | return ret; | |
806 | } | |
807 | ||
658b6eda MM |
808 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
809 | { | |
810 | struct kvm_s390_vm_cpu_processor *proc; | |
053dd230 | 811 | u16 lowest_ibc, unblocked_ibc; |
658b6eda MM |
812 | int ret = 0; |
813 | ||
814 | mutex_lock(&kvm->lock); | |
a03825bb | 815 | if (kvm->created_vcpus) { |
658b6eda MM |
816 | ret = -EBUSY; |
817 | goto out; | |
818 | } | |
819 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
820 | if (!proc) { | |
821 | ret = -ENOMEM; | |
822 | goto out; | |
823 | } | |
824 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
825 | sizeof(*proc))) { | |
9bb0ec09 | 826 | kvm->arch.model.cpuid = proc->cpuid; |
053dd230 DH |
827 | lowest_ibc = sclp.ibc >> 16 & 0xfff; |
828 | unblocked_ibc = sclp.ibc & 0xfff; | |
0487c44d | 829 | if (lowest_ibc && proc->ibc) { |
053dd230 DH |
830 | if (proc->ibc > unblocked_ibc) |
831 | kvm->arch.model.ibc = unblocked_ibc; | |
832 | else if (proc->ibc < lowest_ibc) | |
833 | kvm->arch.model.ibc = lowest_ibc; | |
834 | else | |
835 | kvm->arch.model.ibc = proc->ibc; | |
836 | } | |
c54f0d6a | 837 | memcpy(kvm->arch.model.fac_list, proc->fac_list, |
658b6eda | 838 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
a8c39dd7 CB |
839 | VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx", |
840 | kvm->arch.model.ibc, | |
841 | kvm->arch.model.cpuid); | |
842 | VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx", | |
843 | kvm->arch.model.fac_list[0], | |
844 | kvm->arch.model.fac_list[1], | |
845 | kvm->arch.model.fac_list[2]); | |
658b6eda MM |
846 | } else |
847 | ret = -EFAULT; | |
848 | kfree(proc); | |
849 | out: | |
850 | mutex_unlock(&kvm->lock); | |
851 | return ret; | |
852 | } | |
853 | ||
15c9705f DH |
854 | static int kvm_s390_set_processor_feat(struct kvm *kvm, |
855 | struct kvm_device_attr *attr) | |
856 | { | |
857 | struct kvm_s390_vm_cpu_feat data; | |
858 | int ret = -EBUSY; | |
859 | ||
860 | if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data))) | |
861 | return -EFAULT; | |
862 | if (!bitmap_subset((unsigned long *) data.feat, | |
863 | kvm_s390_available_cpu_feat, | |
864 | KVM_S390_VM_CPU_FEAT_NR_BITS)) | |
865 | return -EINVAL; | |
866 | ||
867 | mutex_lock(&kvm->lock); | |
868 | if (!atomic_read(&kvm->online_vcpus)) { | |
869 | bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat, | |
870 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
871 | ret = 0; | |
872 | } | |
873 | mutex_unlock(&kvm->lock); | |
874 | return ret; | |
875 | } | |
876 | ||
0a763c78 DH |
877 | static int kvm_s390_set_processor_subfunc(struct kvm *kvm, |
878 | struct kvm_device_attr *attr) | |
879 | { | |
880 | /* | |
881 | * Once supported by kernel + hw, we have to store the subfunctions | |
882 | * in kvm->arch and remember that user space configured them. | |
883 | */ | |
884 | return -ENXIO; | |
885 | } | |
886 | ||
658b6eda MM |
887 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
888 | { | |
889 | int ret = -ENXIO; | |
890 | ||
891 | switch (attr->attr) { | |
892 | case KVM_S390_VM_CPU_PROCESSOR: | |
893 | ret = kvm_s390_set_processor(kvm, attr); | |
894 | break; | |
15c9705f DH |
895 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
896 | ret = kvm_s390_set_processor_feat(kvm, attr); | |
897 | break; | |
0a763c78 DH |
898 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
899 | ret = kvm_s390_set_processor_subfunc(kvm, attr); | |
900 | break; | |
658b6eda MM |
901 | } |
902 | return ret; | |
903 | } | |
904 | ||
905 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
906 | { | |
907 | struct kvm_s390_vm_cpu_processor *proc; | |
908 | int ret = 0; | |
909 | ||
910 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
911 | if (!proc) { | |
912 | ret = -ENOMEM; | |
913 | goto out; | |
914 | } | |
9bb0ec09 | 915 | proc->cpuid = kvm->arch.model.cpuid; |
658b6eda | 916 | proc->ibc = kvm->arch.model.ibc; |
c54f0d6a DH |
917 | memcpy(&proc->fac_list, kvm->arch.model.fac_list, |
918 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
a8c39dd7 CB |
919 | VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx", |
920 | kvm->arch.model.ibc, | |
921 | kvm->arch.model.cpuid); | |
922 | VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx", | |
923 | kvm->arch.model.fac_list[0], | |
924 | kvm->arch.model.fac_list[1], | |
925 | kvm->arch.model.fac_list[2]); | |
658b6eda MM |
926 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
927 | ret = -EFAULT; | |
928 | kfree(proc); | |
929 | out: | |
930 | return ret; | |
931 | } | |
932 | ||
933 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
934 | { | |
935 | struct kvm_s390_vm_cpu_machine *mach; | |
936 | int ret = 0; | |
937 | ||
938 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
939 | if (!mach) { | |
940 | ret = -ENOMEM; | |
941 | goto out; | |
942 | } | |
943 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 944 | mach->ibc = sclp.ibc; |
c54f0d6a | 945 | memcpy(&mach->fac_mask, kvm->arch.model.fac_mask, |
981467c9 | 946 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda | 947 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
04478197 | 948 | sizeof(S390_lowcore.stfle_fac_list)); |
a8c39dd7 CB |
949 | VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx", |
950 | kvm->arch.model.ibc, | |
951 | kvm->arch.model.cpuid); | |
952 | VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx", | |
953 | mach->fac_mask[0], | |
954 | mach->fac_mask[1], | |
955 | mach->fac_mask[2]); | |
956 | VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx", | |
957 | mach->fac_list[0], | |
958 | mach->fac_list[1], | |
959 | mach->fac_list[2]); | |
658b6eda MM |
960 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
961 | ret = -EFAULT; | |
962 | kfree(mach); | |
963 | out: | |
964 | return ret; | |
965 | } | |
966 | ||
15c9705f DH |
967 | static int kvm_s390_get_processor_feat(struct kvm *kvm, |
968 | struct kvm_device_attr *attr) | |
969 | { | |
970 | struct kvm_s390_vm_cpu_feat data; | |
971 | ||
972 | bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat, | |
973 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
974 | if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) | |
975 | return -EFAULT; | |
976 | return 0; | |
977 | } | |
978 | ||
979 | static int kvm_s390_get_machine_feat(struct kvm *kvm, | |
980 | struct kvm_device_attr *attr) | |
981 | { | |
982 | struct kvm_s390_vm_cpu_feat data; | |
983 | ||
984 | bitmap_copy((unsigned long *) data.feat, | |
985 | kvm_s390_available_cpu_feat, | |
986 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
987 | if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) | |
988 | return -EFAULT; | |
989 | return 0; | |
990 | } | |
991 | ||
0a763c78 DH |
992 | static int kvm_s390_get_processor_subfunc(struct kvm *kvm, |
993 | struct kvm_device_attr *attr) | |
994 | { | |
995 | /* | |
996 | * Once we can actually configure subfunctions (kernel + hw support), | |
997 | * we have to check if they were already set by user space, if so copy | |
998 | * them from kvm->arch. | |
999 | */ | |
1000 | return -ENXIO; | |
1001 | } | |
1002 | ||
1003 | static int kvm_s390_get_machine_subfunc(struct kvm *kvm, | |
1004 | struct kvm_device_attr *attr) | |
1005 | { | |
1006 | if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc, | |
1007 | sizeof(struct kvm_s390_vm_cpu_subfunc))) | |
1008 | return -EFAULT; | |
1009 | return 0; | |
1010 | } | |
658b6eda MM |
1011 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
1012 | { | |
1013 | int ret = -ENXIO; | |
1014 | ||
1015 | switch (attr->attr) { | |
1016 | case KVM_S390_VM_CPU_PROCESSOR: | |
1017 | ret = kvm_s390_get_processor(kvm, attr); | |
1018 | break; | |
1019 | case KVM_S390_VM_CPU_MACHINE: | |
1020 | ret = kvm_s390_get_machine(kvm, attr); | |
1021 | break; | |
15c9705f DH |
1022 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
1023 | ret = kvm_s390_get_processor_feat(kvm, attr); | |
1024 | break; | |
1025 | case KVM_S390_VM_CPU_MACHINE_FEAT: | |
1026 | ret = kvm_s390_get_machine_feat(kvm, attr); | |
1027 | break; | |
0a763c78 DH |
1028 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
1029 | ret = kvm_s390_get_processor_subfunc(kvm, attr); | |
1030 | break; | |
1031 | case KVM_S390_VM_CPU_MACHINE_SUBFUNC: | |
1032 | ret = kvm_s390_get_machine_subfunc(kvm, attr); | |
1033 | break; | |
658b6eda MM |
1034 | } |
1035 | return ret; | |
1036 | } | |
1037 | ||
f2061656 DD |
1038 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
1039 | { | |
1040 | int ret; | |
1041 | ||
1042 | switch (attr->group) { | |
4f718eab | 1043 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 1044 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 1045 | break; |
72f25020 JH |
1046 | case KVM_S390_VM_TOD: |
1047 | ret = kvm_s390_set_tod(kvm, attr); | |
1048 | break; | |
658b6eda MM |
1049 | case KVM_S390_VM_CPU_MODEL: |
1050 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
1051 | break; | |
a374e892 TK |
1052 | case KVM_S390_VM_CRYPTO: |
1053 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
1054 | break; | |
f2061656 DD |
1055 | default: |
1056 | ret = -ENXIO; | |
1057 | break; | |
1058 | } | |
1059 | ||
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
1064 | { | |
8c0a7ce6 DD |
1065 | int ret; |
1066 | ||
1067 | switch (attr->group) { | |
1068 | case KVM_S390_VM_MEM_CTRL: | |
1069 | ret = kvm_s390_get_mem_control(kvm, attr); | |
1070 | break; | |
72f25020 JH |
1071 | case KVM_S390_VM_TOD: |
1072 | ret = kvm_s390_get_tod(kvm, attr); | |
1073 | break; | |
658b6eda MM |
1074 | case KVM_S390_VM_CPU_MODEL: |
1075 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
1076 | break; | |
8c0a7ce6 DD |
1077 | default: |
1078 | ret = -ENXIO; | |
1079 | break; | |
1080 | } | |
1081 | ||
1082 | return ret; | |
f2061656 DD |
1083 | } |
1084 | ||
1085 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
1086 | { | |
1087 | int ret; | |
1088 | ||
1089 | switch (attr->group) { | |
4f718eab DD |
1090 | case KVM_S390_VM_MEM_CTRL: |
1091 | switch (attr->attr) { | |
1092 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
1093 | case KVM_S390_VM_MEM_CLR_CMMA: | |
f9cbd9b0 DH |
1094 | ret = sclp.has_cmma ? 0 : -ENXIO; |
1095 | break; | |
8c0a7ce6 | 1096 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
1097 | ret = 0; |
1098 | break; | |
1099 | default: | |
1100 | ret = -ENXIO; | |
1101 | break; | |
1102 | } | |
1103 | break; | |
72f25020 JH |
1104 | case KVM_S390_VM_TOD: |
1105 | switch (attr->attr) { | |
1106 | case KVM_S390_VM_TOD_LOW: | |
1107 | case KVM_S390_VM_TOD_HIGH: | |
1108 | ret = 0; | |
1109 | break; | |
1110 | default: | |
1111 | ret = -ENXIO; | |
1112 | break; | |
1113 | } | |
1114 | break; | |
658b6eda MM |
1115 | case KVM_S390_VM_CPU_MODEL: |
1116 | switch (attr->attr) { | |
1117 | case KVM_S390_VM_CPU_PROCESSOR: | |
1118 | case KVM_S390_VM_CPU_MACHINE: | |
15c9705f DH |
1119 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
1120 | case KVM_S390_VM_CPU_MACHINE_FEAT: | |
0a763c78 | 1121 | case KVM_S390_VM_CPU_MACHINE_SUBFUNC: |
658b6eda MM |
1122 | ret = 0; |
1123 | break; | |
0a763c78 DH |
1124 | /* configuring subfunctions is not supported yet */ |
1125 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: | |
658b6eda MM |
1126 | default: |
1127 | ret = -ENXIO; | |
1128 | break; | |
1129 | } | |
1130 | break; | |
a374e892 TK |
1131 | case KVM_S390_VM_CRYPTO: |
1132 | switch (attr->attr) { | |
1133 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
1134 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
1135 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
1136 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
1137 | ret = 0; | |
1138 | break; | |
1139 | default: | |
1140 | ret = -ENXIO; | |
1141 | break; | |
1142 | } | |
1143 | break; | |
f2061656 DD |
1144 | default: |
1145 | ret = -ENXIO; | |
1146 | break; | |
1147 | } | |
1148 | ||
1149 | return ret; | |
1150 | } | |
1151 | ||
30ee2a98 JH |
1152 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
1153 | { | |
1154 | uint8_t *keys; | |
1155 | uint64_t hva; | |
30ee2a98 JH |
1156 | int i, r = 0; |
1157 | ||
1158 | if (args->flags != 0) | |
1159 | return -EINVAL; | |
1160 | ||
1161 | /* Is this guest using storage keys? */ | |
1162 | if (!mm_use_skey(current->mm)) | |
1163 | return KVM_S390_GET_SKEYS_NONE; | |
1164 | ||
1165 | /* Enforce sane limit on memory allocation */ | |
1166 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
1167 | return -EINVAL; | |
1168 | ||
1169 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
1170 | GFP_KERNEL | __GFP_NOWARN); | |
1171 | if (!keys) | |
1172 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
1173 | if (!keys) | |
1174 | return -ENOMEM; | |
1175 | ||
d3ed1cee | 1176 | down_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1177 | for (i = 0; i < args->count; i++) { |
1178 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1179 | if (kvm_is_error_hva(hva)) { | |
1180 | r = -EFAULT; | |
d3ed1cee | 1181 | break; |
30ee2a98 JH |
1182 | } |
1183 | ||
154c8c19 DH |
1184 | r = get_guest_storage_key(current->mm, hva, &keys[i]); |
1185 | if (r) | |
d3ed1cee | 1186 | break; |
30ee2a98 | 1187 | } |
d3ed1cee MS |
1188 | up_read(¤t->mm->mmap_sem); |
1189 | ||
1190 | if (!r) { | |
1191 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
1192 | sizeof(uint8_t) * args->count); | |
1193 | if (r) | |
1194 | r = -EFAULT; | |
30ee2a98 JH |
1195 | } |
1196 | ||
30ee2a98 JH |
1197 | kvfree(keys); |
1198 | return r; | |
1199 | } | |
1200 | ||
1201 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
1202 | { | |
1203 | uint8_t *keys; | |
1204 | uint64_t hva; | |
1205 | int i, r = 0; | |
1206 | ||
1207 | if (args->flags != 0) | |
1208 | return -EINVAL; | |
1209 | ||
1210 | /* Enforce sane limit on memory allocation */ | |
1211 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
1212 | return -EINVAL; | |
1213 | ||
1214 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
1215 | GFP_KERNEL | __GFP_NOWARN); | |
1216 | if (!keys) | |
1217 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
1218 | if (!keys) | |
1219 | return -ENOMEM; | |
1220 | ||
1221 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
1222 | sizeof(uint8_t) * args->count); | |
1223 | if (r) { | |
1224 | r = -EFAULT; | |
1225 | goto out; | |
1226 | } | |
1227 | ||
1228 | /* Enable storage key handling for the guest */ | |
14d4a425 DD |
1229 | r = s390_enable_skey(); |
1230 | if (r) | |
1231 | goto out; | |
30ee2a98 | 1232 | |
d3ed1cee | 1233 | down_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1234 | for (i = 0; i < args->count; i++) { |
1235 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1236 | if (kvm_is_error_hva(hva)) { | |
1237 | r = -EFAULT; | |
d3ed1cee | 1238 | break; |
30ee2a98 JH |
1239 | } |
1240 | ||
1241 | /* Lowest order bit is reserved */ | |
1242 | if (keys[i] & 0x01) { | |
1243 | r = -EINVAL; | |
d3ed1cee | 1244 | break; |
30ee2a98 JH |
1245 | } |
1246 | ||
fe69eabf | 1247 | r = set_guest_storage_key(current->mm, hva, keys[i], 0); |
30ee2a98 | 1248 | if (r) |
d3ed1cee | 1249 | break; |
30ee2a98 | 1250 | } |
d3ed1cee | 1251 | up_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1252 | out: |
1253 | kvfree(keys); | |
1254 | return r; | |
1255 | } | |
1256 | ||
b0c632db HC |
1257 | long kvm_arch_vm_ioctl(struct file *filp, |
1258 | unsigned int ioctl, unsigned long arg) | |
1259 | { | |
1260 | struct kvm *kvm = filp->private_data; | |
1261 | void __user *argp = (void __user *)arg; | |
f2061656 | 1262 | struct kvm_device_attr attr; |
b0c632db HC |
1263 | int r; |
1264 | ||
1265 | switch (ioctl) { | |
ba5c1e9b CO |
1266 | case KVM_S390_INTERRUPT: { |
1267 | struct kvm_s390_interrupt s390int; | |
1268 | ||
1269 | r = -EFAULT; | |
1270 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
1271 | break; | |
1272 | r = kvm_s390_inject_vm(kvm, &s390int); | |
1273 | break; | |
1274 | } | |
d938dc55 CH |
1275 | case KVM_ENABLE_CAP: { |
1276 | struct kvm_enable_cap cap; | |
1277 | r = -EFAULT; | |
1278 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1279 | break; | |
1280 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
1281 | break; | |
1282 | } | |
84223598 CH |
1283 | case KVM_CREATE_IRQCHIP: { |
1284 | struct kvm_irq_routing_entry routing; | |
1285 | ||
1286 | r = -EINVAL; | |
1287 | if (kvm->arch.use_irqchip) { | |
1288 | /* Set up dummy routing. */ | |
1289 | memset(&routing, 0, sizeof(routing)); | |
152b2839 | 1290 | r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
84223598 CH |
1291 | } |
1292 | break; | |
1293 | } | |
f2061656 DD |
1294 | case KVM_SET_DEVICE_ATTR: { |
1295 | r = -EFAULT; | |
1296 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1297 | break; | |
1298 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
1299 | break; | |
1300 | } | |
1301 | case KVM_GET_DEVICE_ATTR: { | |
1302 | r = -EFAULT; | |
1303 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1304 | break; | |
1305 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
1306 | break; | |
1307 | } | |
1308 | case KVM_HAS_DEVICE_ATTR: { | |
1309 | r = -EFAULT; | |
1310 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1311 | break; | |
1312 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
1313 | break; | |
1314 | } | |
30ee2a98 JH |
1315 | case KVM_S390_GET_SKEYS: { |
1316 | struct kvm_s390_skeys args; | |
1317 | ||
1318 | r = -EFAULT; | |
1319 | if (copy_from_user(&args, argp, | |
1320 | sizeof(struct kvm_s390_skeys))) | |
1321 | break; | |
1322 | r = kvm_s390_get_skeys(kvm, &args); | |
1323 | break; | |
1324 | } | |
1325 | case KVM_S390_SET_SKEYS: { | |
1326 | struct kvm_s390_skeys args; | |
1327 | ||
1328 | r = -EFAULT; | |
1329 | if (copy_from_user(&args, argp, | |
1330 | sizeof(struct kvm_s390_skeys))) | |
1331 | break; | |
1332 | r = kvm_s390_set_skeys(kvm, &args); | |
1333 | break; | |
1334 | } | |
b0c632db | 1335 | default: |
367e1319 | 1336 | r = -ENOTTY; |
b0c632db HC |
1337 | } |
1338 | ||
1339 | return r; | |
1340 | } | |
1341 | ||
45c9b47c TK |
1342 | static int kvm_s390_query_ap_config(u8 *config) |
1343 | { | |
1344 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 1345 | u32 cc = 0; |
45c9b47c | 1346 | |
86044c8c | 1347 | memset(config, 0, 128); |
45c9b47c TK |
1348 | asm volatile( |
1349 | "lgr 0,%1\n" | |
1350 | "lgr 2,%2\n" | |
1351 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 1352 | "0: ipm %0\n" |
45c9b47c | 1353 | "srl %0,28\n" |
86044c8c CB |
1354 | "1:\n" |
1355 | EX_TABLE(0b, 1b) | |
1356 | : "+r" (cc) | |
45c9b47c TK |
1357 | : "r" (fcn_code), "r" (config) |
1358 | : "cc", "0", "2", "memory" | |
1359 | ); | |
1360 | ||
1361 | return cc; | |
1362 | } | |
1363 | ||
1364 | static int kvm_s390_apxa_installed(void) | |
1365 | { | |
1366 | u8 config[128]; | |
1367 | int cc; | |
1368 | ||
a6aacc3f | 1369 | if (test_facility(12)) { |
45c9b47c TK |
1370 | cc = kvm_s390_query_ap_config(config); |
1371 | ||
1372 | if (cc) | |
1373 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
1374 | else | |
1375 | return config[0] & 0x40; | |
1376 | } | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
1382 | { | |
1383 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
1384 | ||
1385 | if (kvm_s390_apxa_installed()) | |
1386 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
1387 | else | |
1388 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
1389 | } | |
1390 | ||
9bb0ec09 | 1391 | static u64 kvm_s390_get_initial_cpuid(void) |
9d8d5786 | 1392 | { |
9bb0ec09 DH |
1393 | struct cpuid cpuid; |
1394 | ||
1395 | get_cpu_id(&cpuid); | |
1396 | cpuid.version = 0xff; | |
1397 | return *((u64 *) &cpuid); | |
9d8d5786 MM |
1398 | } |
1399 | ||
c54f0d6a | 1400 | static void kvm_s390_crypto_init(struct kvm *kvm) |
5102ee87 | 1401 | { |
9d8d5786 | 1402 | if (!test_kvm_facility(kvm, 76)) |
c54f0d6a | 1403 | return; |
5102ee87 | 1404 | |
c54f0d6a | 1405 | kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; |
45c9b47c | 1406 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1407 | |
ed6f76b4 TK |
1408 | /* Enable AES/DEA protected key functions by default */ |
1409 | kvm->arch.crypto.aes_kw = 1; | |
1410 | kvm->arch.crypto.dea_kw = 1; | |
1411 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1412 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1413 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1414 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
5102ee87 TK |
1415 | } |
1416 | ||
7d43bafc ED |
1417 | static void sca_dispose(struct kvm *kvm) |
1418 | { | |
1419 | if (kvm->arch.use_esca) | |
5e044315 | 1420 | free_pages_exact(kvm->arch.sca, sizeof(struct esca_block)); |
7d43bafc ED |
1421 | else |
1422 | free_page((unsigned long)(kvm->arch.sca)); | |
1423 | kvm->arch.sca = NULL; | |
1424 | } | |
1425 | ||
e08b9637 | 1426 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1427 | { |
76a6dd72 | 1428 | gfp_t alloc_flags = GFP_KERNEL; |
9d8d5786 | 1429 | int i, rc; |
b0c632db | 1430 | char debug_name[16]; |
f6c137ff | 1431 | static unsigned long sca_offset; |
b0c632db | 1432 | |
e08b9637 CO |
1433 | rc = -EINVAL; |
1434 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1435 | if (type & ~KVM_VM_S390_UCONTROL) | |
1436 | goto out_err; | |
1437 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1438 | goto out_err; | |
1439 | #else | |
1440 | if (type) | |
1441 | goto out_err; | |
1442 | #endif | |
1443 | ||
b0c632db HC |
1444 | rc = s390_enable_sie(); |
1445 | if (rc) | |
d89f5eff | 1446 | goto out_err; |
b0c632db | 1447 | |
b290411a CO |
1448 | rc = -ENOMEM; |
1449 | ||
7d0a5e62 JF |
1450 | ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500); |
1451 | ||
7d43bafc | 1452 | kvm->arch.use_esca = 0; /* start with basic SCA */ |
76a6dd72 DH |
1453 | if (!sclp.has_64bscao) |
1454 | alloc_flags |= GFP_DMA; | |
5e044315 | 1455 | rwlock_init(&kvm->arch.sca_lock); |
76a6dd72 | 1456 | kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags); |
b0c632db | 1457 | if (!kvm->arch.sca) |
d89f5eff | 1458 | goto out_err; |
f6c137ff | 1459 | spin_lock(&kvm_lock); |
c5c2c393 | 1460 | sca_offset += 16; |
bc784cce | 1461 | if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE) |
c5c2c393 | 1462 | sca_offset = 0; |
bc784cce ED |
1463 | kvm->arch.sca = (struct bsca_block *) |
1464 | ((char *) kvm->arch.sca + sca_offset); | |
f6c137ff | 1465 | spin_unlock(&kvm_lock); |
b0c632db HC |
1466 | |
1467 | sprintf(debug_name, "kvm-%u", current->pid); | |
1468 | ||
1cb9cf72 | 1469 | kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
b0c632db | 1470 | if (!kvm->arch.dbf) |
40f5b735 | 1471 | goto out_err; |
b0c632db | 1472 | |
c54f0d6a DH |
1473 | kvm->arch.sie_page2 = |
1474 | (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1475 | if (!kvm->arch.sie_page2) | |
40f5b735 | 1476 | goto out_err; |
9d8d5786 | 1477 | |
fb5bf93f | 1478 | /* Populate the facility mask initially. */ |
c54f0d6a | 1479 | memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list, |
04478197 | 1480 | sizeof(S390_lowcore.stfle_fac_list)); |
9d8d5786 MM |
1481 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1482 | if (i < kvm_s390_fac_list_mask_size()) | |
c54f0d6a | 1483 | kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1484 | else |
c54f0d6a | 1485 | kvm->arch.model.fac_mask[i] = 0UL; |
9d8d5786 MM |
1486 | } |
1487 | ||
981467c9 | 1488 | /* Populate the facility list initially. */ |
c54f0d6a DH |
1489 | kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list; |
1490 | memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask, | |
981467c9 MM |
1491 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
1492 | ||
95ca2cb5 JF |
1493 | set_kvm_facility(kvm->arch.model.fac_mask, 74); |
1494 | set_kvm_facility(kvm->arch.model.fac_list, 74); | |
1495 | ||
9bb0ec09 | 1496 | kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid(); |
37c5f6c8 | 1497 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1498 | |
c54f0d6a | 1499 | kvm_s390_crypto_init(kvm); |
5102ee87 | 1500 | |
ba5c1e9b | 1501 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1502 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1503 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1504 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1505 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1506 | |
b0c632db | 1507 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
78f26131 | 1508 | VM_EVENT(kvm, 3, "vm created with type %lu", type); |
b0c632db | 1509 | |
e08b9637 CO |
1510 | if (type & KVM_VM_S390_UCONTROL) { |
1511 | kvm->arch.gmap = NULL; | |
a3a92c31 | 1512 | kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT; |
e08b9637 | 1513 | } else { |
32e6b236 | 1514 | if (sclp.hamax == U64_MAX) |
ee71d16d | 1515 | kvm->arch.mem_limit = TASK_SIZE_MAX; |
32e6b236 | 1516 | else |
ee71d16d | 1517 | kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX, |
32e6b236 | 1518 | sclp.hamax + 1); |
6ea427bb | 1519 | kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1); |
e08b9637 | 1520 | if (!kvm->arch.gmap) |
40f5b735 | 1521 | goto out_err; |
2c70fe44 | 1522 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1523 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1524 | } |
fa6b7fe9 CH |
1525 | |
1526 | kvm->arch.css_support = 0; | |
84223598 | 1527 | kvm->arch.use_irqchip = 0; |
72f25020 | 1528 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1529 | |
8ad35755 | 1530 | spin_lock_init(&kvm->arch.start_stop_lock); |
a3508fbe | 1531 | kvm_s390_vsie_init(kvm); |
8335713a | 1532 | KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid); |
8ad35755 | 1533 | |
d89f5eff | 1534 | return 0; |
40f5b735 | 1535 | out_err: |
c54f0d6a | 1536 | free_page((unsigned long)kvm->arch.sie_page2); |
598841ca | 1537 | debug_unregister(kvm->arch.dbf); |
7d43bafc | 1538 | sca_dispose(kvm); |
78f26131 | 1539 | KVM_EVENT(3, "creation of vm failed: %d", rc); |
d89f5eff | 1540 | return rc; |
b0c632db HC |
1541 | } |
1542 | ||
235539b4 LC |
1543 | bool kvm_arch_has_vcpu_debugfs(void) |
1544 | { | |
1545 | return false; | |
1546 | } | |
1547 | ||
1548 | int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) | |
1549 | { | |
1550 | return 0; | |
1551 | } | |
1552 | ||
d329c035 CB |
1553 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1554 | { | |
1555 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1556 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1557 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1558 | kvm_clear_async_pf_completion_queue(vcpu); |
bc784cce | 1559 | if (!kvm_is_ucontrol(vcpu->kvm)) |
a6e2f683 | 1560 | sca_del_vcpu(vcpu); |
27e0393f CO |
1561 | |
1562 | if (kvm_is_ucontrol(vcpu->kvm)) | |
6ea427bb | 1563 | gmap_remove(vcpu->arch.gmap); |
27e0393f | 1564 | |
e6db1d61 | 1565 | if (vcpu->kvm->arch.use_cmma) |
b31605c1 | 1566 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
d329c035 | 1567 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1568 | |
6692cef3 | 1569 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1570 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1571 | } |
1572 | ||
1573 | static void kvm_free_vcpus(struct kvm *kvm) | |
1574 | { | |
1575 | unsigned int i; | |
988a2cae | 1576 | struct kvm_vcpu *vcpu; |
d329c035 | 1577 | |
988a2cae GN |
1578 | kvm_for_each_vcpu(i, vcpu, kvm) |
1579 | kvm_arch_vcpu_destroy(vcpu); | |
1580 | ||
1581 | mutex_lock(&kvm->lock); | |
1582 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1583 | kvm->vcpus[i] = NULL; | |
1584 | ||
1585 | atomic_set(&kvm->online_vcpus, 0); | |
1586 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1587 | } |
1588 | ||
b0c632db HC |
1589 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1590 | { | |
d329c035 | 1591 | kvm_free_vcpus(kvm); |
7d43bafc | 1592 | sca_dispose(kvm); |
d329c035 | 1593 | debug_unregister(kvm->arch.dbf); |
c54f0d6a | 1594 | free_page((unsigned long)kvm->arch.sie_page2); |
27e0393f | 1595 | if (!kvm_is_ucontrol(kvm)) |
6ea427bb | 1596 | gmap_remove(kvm->arch.gmap); |
841b91c5 | 1597 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1598 | kvm_s390_clear_float_irqs(kvm); |
a3508fbe | 1599 | kvm_s390_vsie_destroy(kvm); |
8335713a | 1600 | KVM_EVENT(3, "vm 0x%pK destroyed", kvm); |
b0c632db HC |
1601 | } |
1602 | ||
1603 | /* Section: vcpu related */ | |
dafd032a DD |
1604 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1605 | { | |
6ea427bb | 1606 | vcpu->arch.gmap = gmap_create(current->mm, -1UL); |
dafd032a DD |
1607 | if (!vcpu->arch.gmap) |
1608 | return -ENOMEM; | |
1609 | vcpu->arch.gmap->private = vcpu->kvm; | |
1610 | ||
1611 | return 0; | |
1612 | } | |
1613 | ||
a6e2f683 ED |
1614 | static void sca_del_vcpu(struct kvm_vcpu *vcpu) |
1615 | { | |
a6940674 DH |
1616 | if (!kvm_s390_use_sca_entries()) |
1617 | return; | |
5e044315 | 1618 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
1619 | if (vcpu->kvm->arch.use_esca) { |
1620 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
a6e2f683 | 1621 | |
7d43bafc | 1622 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
10ce32d5 | 1623 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc ED |
1624 | } else { |
1625 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
1626 | ||
1627 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); | |
10ce32d5 | 1628 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc | 1629 | } |
5e044315 | 1630 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a6e2f683 ED |
1631 | } |
1632 | ||
eaa78f34 | 1633 | static void sca_add_vcpu(struct kvm_vcpu *vcpu) |
a6e2f683 | 1634 | { |
a6940674 DH |
1635 | if (!kvm_s390_use_sca_entries()) { |
1636 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
1637 | ||
1638 | /* we still need the basic sca for the ipte control */ | |
1639 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); | |
1640 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
1641 | } | |
eaa78f34 DH |
1642 | read_lock(&vcpu->kvm->arch.sca_lock); |
1643 | if (vcpu->kvm->arch.use_esca) { | |
1644 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
7d43bafc | 1645 | |
eaa78f34 | 1646 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1647 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1648 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU; | |
25508824 | 1649 | vcpu->arch.sie_block->ecb2 |= 0x04U; |
eaa78f34 | 1650 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
7d43bafc | 1651 | } else { |
eaa78f34 | 1652 | struct bsca_block *sca = vcpu->kvm->arch.sca; |
a6e2f683 | 1653 | |
eaa78f34 | 1654 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1655 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1656 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
eaa78f34 | 1657 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); |
7d43bafc | 1658 | } |
eaa78f34 | 1659 | read_unlock(&vcpu->kvm->arch.sca_lock); |
5e044315 ED |
1660 | } |
1661 | ||
1662 | /* Basic SCA to Extended SCA data copy routines */ | |
1663 | static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s) | |
1664 | { | |
1665 | d->sda = s->sda; | |
1666 | d->sigp_ctrl.c = s->sigp_ctrl.c; | |
1667 | d->sigp_ctrl.scn = s->sigp_ctrl.scn; | |
1668 | } | |
1669 | ||
1670 | static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s) | |
1671 | { | |
1672 | int i; | |
1673 | ||
1674 | d->ipte_control = s->ipte_control; | |
1675 | d->mcn[0] = s->mcn; | |
1676 | for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++) | |
1677 | sca_copy_entry(&d->cpu[i], &s->cpu[i]); | |
1678 | } | |
1679 | ||
1680 | static int sca_switch_to_extended(struct kvm *kvm) | |
1681 | { | |
1682 | struct bsca_block *old_sca = kvm->arch.sca; | |
1683 | struct esca_block *new_sca; | |
1684 | struct kvm_vcpu *vcpu; | |
1685 | unsigned int vcpu_idx; | |
1686 | u32 scaol, scaoh; | |
1687 | ||
1688 | new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO); | |
1689 | if (!new_sca) | |
1690 | return -ENOMEM; | |
1691 | ||
1692 | scaoh = (u32)((u64)(new_sca) >> 32); | |
1693 | scaol = (u32)(u64)(new_sca) & ~0x3fU; | |
1694 | ||
1695 | kvm_s390_vcpu_block_all(kvm); | |
1696 | write_lock(&kvm->arch.sca_lock); | |
1697 | ||
1698 | sca_copy_b_to_e(new_sca, old_sca); | |
1699 | ||
1700 | kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) { | |
1701 | vcpu->arch.sie_block->scaoh = scaoh; | |
1702 | vcpu->arch.sie_block->scaol = scaol; | |
1703 | vcpu->arch.sie_block->ecb2 |= 0x04U; | |
1704 | } | |
1705 | kvm->arch.sca = new_sca; | |
1706 | kvm->arch.use_esca = 1; | |
1707 | ||
1708 | write_unlock(&kvm->arch.sca_lock); | |
1709 | kvm_s390_vcpu_unblock_all(kvm); | |
1710 | ||
1711 | free_page((unsigned long)old_sca); | |
1712 | ||
8335713a CB |
1713 | VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)", |
1714 | old_sca, kvm->arch.sca); | |
5e044315 | 1715 | return 0; |
a6e2f683 ED |
1716 | } |
1717 | ||
1718 | static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id) | |
1719 | { | |
5e044315 ED |
1720 | int rc; |
1721 | ||
a6940674 DH |
1722 | if (!kvm_s390_use_sca_entries()) { |
1723 | if (id < KVM_MAX_VCPUS) | |
1724 | return true; | |
1725 | return false; | |
1726 | } | |
5e044315 ED |
1727 | if (id < KVM_S390_BSCA_CPU_SLOTS) |
1728 | return true; | |
76a6dd72 | 1729 | if (!sclp.has_esca || !sclp.has_64bscao) |
5e044315 ED |
1730 | return false; |
1731 | ||
1732 | mutex_lock(&kvm->lock); | |
1733 | rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm); | |
1734 | mutex_unlock(&kvm->lock); | |
1735 | ||
1736 | return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS; | |
a6e2f683 ED |
1737 | } |
1738 | ||
b0c632db HC |
1739 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1740 | { | |
3c038e6b DD |
1741 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1742 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1743 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1744 | KVM_SYNC_GPRS | | |
9eed0735 | 1745 | KVM_SYNC_ACRS | |
b028ee3e DH |
1746 | KVM_SYNC_CRS | |
1747 | KVM_SYNC_ARCH0 | | |
1748 | KVM_SYNC_PFAULT; | |
75a4615c | 1749 | kvm_s390_set_prefix(vcpu, 0); |
c6e5f166 FZ |
1750 | if (test_kvm_facility(vcpu->kvm, 64)) |
1751 | vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB; | |
f6aa6dc4 DH |
1752 | /* fprs can be synchronized via vrs, even if the guest has no vx. With |
1753 | * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. | |
1754 | */ | |
1755 | if (MACHINE_HAS_VX) | |
68c55750 | 1756 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; |
6fd8e67d DH |
1757 | else |
1758 | vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS; | |
dafd032a DD |
1759 | |
1760 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1761 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1762 | ||
b0c632db HC |
1763 | return 0; |
1764 | } | |
1765 | ||
db0758b2 DH |
1766 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
1767 | static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1768 | { | |
1769 | WARN_ON_ONCE(vcpu->arch.cputm_start != 0); | |
9c23a131 | 1770 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1771 | vcpu->arch.cputm_start = get_tod_clock_fast(); |
9c23a131 | 1772 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1773 | } |
1774 | ||
1775 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1776 | static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1777 | { | |
1778 | WARN_ON_ONCE(vcpu->arch.cputm_start == 0); | |
9c23a131 | 1779 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1780 | vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start; |
1781 | vcpu->arch.cputm_start = 0; | |
9c23a131 | 1782 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1783 | } |
1784 | ||
1785 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1786 | static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1787 | { | |
1788 | WARN_ON_ONCE(vcpu->arch.cputm_enabled); | |
1789 | vcpu->arch.cputm_enabled = true; | |
1790 | __start_cpu_timer_accounting(vcpu); | |
1791 | } | |
1792 | ||
1793 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1794 | static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1795 | { | |
1796 | WARN_ON_ONCE(!vcpu->arch.cputm_enabled); | |
1797 | __stop_cpu_timer_accounting(vcpu); | |
1798 | vcpu->arch.cputm_enabled = false; | |
1799 | } | |
1800 | ||
1801 | static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1802 | { | |
1803 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1804 | __enable_cpu_timer_accounting(vcpu); | |
1805 | preempt_enable(); | |
1806 | } | |
1807 | ||
1808 | static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1809 | { | |
1810 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1811 | __disable_cpu_timer_accounting(vcpu); | |
1812 | preempt_enable(); | |
1813 | } | |
1814 | ||
4287f247 DH |
1815 | /* set the cpu timer - may only be called from the VCPU thread itself */ |
1816 | void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm) | |
1817 | { | |
db0758b2 | 1818 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
9c23a131 | 1819 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1820 | if (vcpu->arch.cputm_enabled) |
1821 | vcpu->arch.cputm_start = get_tod_clock_fast(); | |
4287f247 | 1822 | vcpu->arch.sie_block->cputm = cputm; |
9c23a131 | 1823 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1824 | preempt_enable(); |
4287f247 DH |
1825 | } |
1826 | ||
db0758b2 | 1827 | /* update and get the cpu timer - can also be called from other VCPU threads */ |
4287f247 DH |
1828 | __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) |
1829 | { | |
9c23a131 | 1830 | unsigned int seq; |
db0758b2 | 1831 | __u64 value; |
db0758b2 DH |
1832 | |
1833 | if (unlikely(!vcpu->arch.cputm_enabled)) | |
1834 | return vcpu->arch.sie_block->cputm; | |
1835 | ||
9c23a131 DH |
1836 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
1837 | do { | |
1838 | seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount); | |
1839 | /* | |
1840 | * If the writer would ever execute a read in the critical | |
1841 | * section, e.g. in irq context, we have a deadlock. | |
1842 | */ | |
1843 | WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu); | |
1844 | value = vcpu->arch.sie_block->cputm; | |
1845 | /* if cputm_start is 0, accounting is being started/stopped */ | |
1846 | if (likely(vcpu->arch.cputm_start)) | |
1847 | value -= get_tod_clock_fast() - vcpu->arch.cputm_start; | |
1848 | } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1)); | |
1849 | preempt_enable(); | |
db0758b2 | 1850 | return value; |
4287f247 DH |
1851 | } |
1852 | ||
b0c632db HC |
1853 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1854 | { | |
9977e886 | 1855 | |
37d9df98 | 1856 | gmap_enable(vcpu->arch.enabled_gmap); |
805de8f4 | 1857 | atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
5ebda316 | 1858 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1859 | __start_cpu_timer_accounting(vcpu); |
01a745ac | 1860 | vcpu->cpu = cpu; |
b0c632db HC |
1861 | } |
1862 | ||
1863 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1864 | { | |
01a745ac | 1865 | vcpu->cpu = -1; |
5ebda316 | 1866 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1867 | __stop_cpu_timer_accounting(vcpu); |
805de8f4 | 1868 | atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
37d9df98 DH |
1869 | vcpu->arch.enabled_gmap = gmap_get_enabled(); |
1870 | gmap_disable(vcpu->arch.enabled_gmap); | |
9977e886 | 1871 | |
b0c632db HC |
1872 | } |
1873 | ||
1874 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1875 | { | |
1876 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1877 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1878 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1879 | kvm_s390_set_prefix(vcpu, 0); |
4287f247 | 1880 | kvm_s390_set_cpu_timer(vcpu, 0); |
b0c632db HC |
1881 | vcpu->arch.sie_block->ckc = 0UL; |
1882 | vcpu->arch.sie_block->todpr = 0; | |
1883 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1884 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1885 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
9abc2a08 DH |
1886 | /* make sure the new fpc will be lazily loaded */ |
1887 | save_fpu_regs(); | |
1888 | current->thread.fpu.fpc = 0; | |
b0c632db | 1889 | vcpu->arch.sie_block->gbea = 1; |
672550fb | 1890 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1891 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1892 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1893 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1894 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1895 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1896 | } |
1897 | ||
31928aa5 | 1898 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1899 | { |
72f25020 | 1900 | mutex_lock(&vcpu->kvm->lock); |
fdf03650 | 1901 | preempt_disable(); |
72f25020 | 1902 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
fdf03650 | 1903 | preempt_enable(); |
72f25020 | 1904 | mutex_unlock(&vcpu->kvm->lock); |
25508824 | 1905 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
dafd032a | 1906 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
eaa78f34 | 1907 | sca_add_vcpu(vcpu); |
25508824 | 1908 | } |
6502a34c DH |
1909 | if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0) |
1910 | vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; | |
37d9df98 DH |
1911 | /* make vcpu_load load the right gmap on the first trigger */ |
1912 | vcpu->arch.enabled_gmap = vcpu->arch.gmap; | |
42897d86 MT |
1913 | } |
1914 | ||
5102ee87 TK |
1915 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1916 | { | |
9d8d5786 | 1917 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1918 | return; |
1919 | ||
a374e892 TK |
1920 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1921 | ||
1922 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1923 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1924 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1925 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1926 | ||
5102ee87 TK |
1927 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1928 | } | |
1929 | ||
b31605c1 DD |
1930 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1931 | { | |
1932 | free_page(vcpu->arch.sie_block->cbrlo); | |
1933 | vcpu->arch.sie_block->cbrlo = 0; | |
1934 | } | |
1935 | ||
1936 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1937 | { | |
1938 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1939 | if (!vcpu->arch.sie_block->cbrlo) | |
1940 | return -ENOMEM; | |
1941 | ||
1942 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1943 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1944 | return 0; | |
1945 | } | |
1946 | ||
91520f1a MM |
1947 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1948 | { | |
1949 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1950 | ||
91520f1a | 1951 | vcpu->arch.sie_block->ibc = model->ibc; |
80bc79dc | 1952 | if (test_kvm_facility(vcpu->kvm, 7)) |
c54f0d6a | 1953 | vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list; |
91520f1a MM |
1954 | } |
1955 | ||
b0c632db HC |
1956 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1957 | { | |
b31605c1 | 1958 | int rc = 0; |
b31288fa | 1959 | |
9e6dabef CH |
1960 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1961 | CPUSTAT_SM | | |
a4a4f191 GH |
1962 | CPUSTAT_STOPPED); |
1963 | ||
53df84f8 | 1964 | if (test_kvm_facility(vcpu->kvm, 78)) |
805de8f4 | 1965 | atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); |
53df84f8 | 1966 | else if (test_kvm_facility(vcpu->kvm, 8)) |
805de8f4 | 1967 | atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
a4a4f191 | 1968 | |
91520f1a MM |
1969 | kvm_s390_vcpu_setup_model(vcpu); |
1970 | ||
bdab09f3 DH |
1971 | /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */ |
1972 | if (MACHINE_HAS_ESOP) | |
1973 | vcpu->arch.sie_block->ecb |= 0x02; | |
bd50e8ec DH |
1974 | if (test_kvm_facility(vcpu->kvm, 9)) |
1975 | vcpu->arch.sie_block->ecb |= 0x04; | |
f597d24e | 1976 | if (test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1977 | vcpu->arch.sie_block->ecb |= 0x10; |
1978 | ||
873b425e | 1979 | if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi) |
d6af0b49 | 1980 | vcpu->arch.sie_block->ecb2 |= 0x08; |
cd1836f5 JF |
1981 | if (test_kvm_facility(vcpu->kvm, 130)) |
1982 | vcpu->arch.sie_block->ecb2 |= 0x20; | |
48ee7d3a DH |
1983 | vcpu->arch.sie_block->eca = 0x1002000U; |
1984 | if (sclp.has_cei) | |
1985 | vcpu->arch.sie_block->eca |= 0x80000000U; | |
11ad65b7 DH |
1986 | if (sclp.has_ib) |
1987 | vcpu->arch.sie_block->eca |= 0x40000000U; | |
37c5f6c8 | 1988 | if (sclp.has_siif) |
217a4406 | 1989 | vcpu->arch.sie_block->eca |= 1; |
37c5f6c8 | 1990 | if (sclp.has_sigpif) |
ea5f4969 | 1991 | vcpu->arch.sie_block->eca |= 0x10000000U; |
18280d8b | 1992 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1993 | vcpu->arch.sie_block->eca |= 0x00020000; |
1994 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1995 | } | |
c6e5f166 | 1996 | vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb; |
492d8642 | 1997 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1998 | |
e6db1d61 | 1999 | if (vcpu->kvm->arch.use_cmma) { |
b31605c1 DD |
2000 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
2001 | if (rc) | |
2002 | return rc; | |
b31288fa | 2003 | } |
0ac96caf | 2004 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 2005 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 2006 | |
5102ee87 TK |
2007 | kvm_s390_vcpu_crypto_setup(vcpu); |
2008 | ||
b31605c1 | 2009 | return rc; |
b0c632db HC |
2010 | } |
2011 | ||
2012 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
2013 | unsigned int id) | |
2014 | { | |
4d47555a | 2015 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 2016 | struct sie_page *sie_page; |
4d47555a CO |
2017 | int rc = -EINVAL; |
2018 | ||
4215825e | 2019 | if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id)) |
4d47555a CO |
2020 | goto out; |
2021 | ||
2022 | rc = -ENOMEM; | |
b0c632db | 2023 | |
b110feaf | 2024 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 2025 | if (!vcpu) |
4d47555a | 2026 | goto out; |
b0c632db | 2027 | |
7feb6bb8 MM |
2028 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
2029 | if (!sie_page) | |
b0c632db HC |
2030 | goto out_free_cpu; |
2031 | ||
7feb6bb8 MM |
2032 | vcpu->arch.sie_block = &sie_page->sie_block; |
2033 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
2034 | ||
efed1104 DH |
2035 | /* the real guest size will always be smaller than msl */ |
2036 | vcpu->arch.sie_block->mso = 0; | |
2037 | vcpu->arch.sie_block->msl = sclp.hamax; | |
2038 | ||
b0c632db | 2039 | vcpu->arch.sie_block->icpua = id; |
ba5c1e9b | 2040 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 2041 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 2042 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 2043 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
9c23a131 | 2044 | seqcount_init(&vcpu->arch.cputm_seqcount); |
ba5c1e9b | 2045 | |
b0c632db HC |
2046 | rc = kvm_vcpu_init(vcpu, kvm, id); |
2047 | if (rc) | |
9abc2a08 | 2048 | goto out_free_sie_block; |
8335713a | 2049 | VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu, |
b0c632db | 2050 | vcpu->arch.sie_block); |
ade38c31 | 2051 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 2052 | |
b0c632db | 2053 | return vcpu; |
7b06bf2f WY |
2054 | out_free_sie_block: |
2055 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 2056 | out_free_cpu: |
b110feaf | 2057 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 2058 | out: |
b0c632db HC |
2059 | return ERR_PTR(rc); |
2060 | } | |
2061 | ||
b0c632db HC |
2062 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
2063 | { | |
9a022067 | 2064 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
2065 | } |
2066 | ||
27406cd5 | 2067 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e | 2068 | { |
805de8f4 | 2069 | atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
61a6df54 | 2070 | exit_sie(vcpu); |
49b99e1e CB |
2071 | } |
2072 | ||
27406cd5 | 2073 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e | 2074 | { |
805de8f4 | 2075 | atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
49b99e1e CB |
2076 | } |
2077 | ||
8e236546 CB |
2078 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
2079 | { | |
805de8f4 | 2080 | atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
61a6df54 | 2081 | exit_sie(vcpu); |
8e236546 CB |
2082 | } |
2083 | ||
2084 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
2085 | { | |
9bf9fde2 | 2086 | atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
8e236546 CB |
2087 | } |
2088 | ||
49b99e1e CB |
2089 | /* |
2090 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
2091 | * If the CPU is not running (e.g. waiting as idle) the function will | |
2092 | * return immediately. */ | |
2093 | void exit_sie(struct kvm_vcpu *vcpu) | |
2094 | { | |
805de8f4 | 2095 | atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
49b99e1e CB |
2096 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
2097 | cpu_relax(); | |
2098 | } | |
2099 | ||
8e236546 CB |
2100 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
2101 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 2102 | { |
8e236546 CB |
2103 | kvm_make_request(req, vcpu); |
2104 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
2105 | } |
2106 | ||
414d3b07 MS |
2107 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
2108 | unsigned long end) | |
2c70fe44 | 2109 | { |
2c70fe44 CB |
2110 | struct kvm *kvm = gmap->private; |
2111 | struct kvm_vcpu *vcpu; | |
414d3b07 MS |
2112 | unsigned long prefix; |
2113 | int i; | |
2c70fe44 | 2114 | |
65d0b0d4 DH |
2115 | if (gmap_is_shadow(gmap)) |
2116 | return; | |
414d3b07 MS |
2117 | if (start >= 1UL << 31) |
2118 | /* We are only interested in prefix pages */ | |
2119 | return; | |
2c70fe44 CB |
2120 | kvm_for_each_vcpu(i, vcpu, kvm) { |
2121 | /* match against both prefix pages */ | |
414d3b07 MS |
2122 | prefix = kvm_s390_get_prefix(vcpu); |
2123 | if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) { | |
2124 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx", | |
2125 | start, end); | |
8e236546 | 2126 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
2127 | } |
2128 | } | |
2129 | } | |
2130 | ||
b6d33834 CD |
2131 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
2132 | { | |
2133 | /* kvm common code refers to this, but never calls it */ | |
2134 | BUG(); | |
2135 | return 0; | |
2136 | } | |
2137 | ||
14eebd91 CO |
2138 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
2139 | struct kvm_one_reg *reg) | |
2140 | { | |
2141 | int r = -EINVAL; | |
2142 | ||
2143 | switch (reg->id) { | |
29b7c71b CO |
2144 | case KVM_REG_S390_TODPR: |
2145 | r = put_user(vcpu->arch.sie_block->todpr, | |
2146 | (u32 __user *)reg->addr); | |
2147 | break; | |
2148 | case KVM_REG_S390_EPOCHDIFF: | |
2149 | r = put_user(vcpu->arch.sie_block->epoch, | |
2150 | (u64 __user *)reg->addr); | |
2151 | break; | |
46a6dd1c | 2152 | case KVM_REG_S390_CPU_TIMER: |
4287f247 | 2153 | r = put_user(kvm_s390_get_cpu_timer(vcpu), |
46a6dd1c J |
2154 | (u64 __user *)reg->addr); |
2155 | break; | |
2156 | case KVM_REG_S390_CLOCK_COMP: | |
2157 | r = put_user(vcpu->arch.sie_block->ckc, | |
2158 | (u64 __user *)reg->addr); | |
2159 | break; | |
536336c2 DD |
2160 | case KVM_REG_S390_PFTOKEN: |
2161 | r = put_user(vcpu->arch.pfault_token, | |
2162 | (u64 __user *)reg->addr); | |
2163 | break; | |
2164 | case KVM_REG_S390_PFCOMPARE: | |
2165 | r = put_user(vcpu->arch.pfault_compare, | |
2166 | (u64 __user *)reg->addr); | |
2167 | break; | |
2168 | case KVM_REG_S390_PFSELECT: | |
2169 | r = put_user(vcpu->arch.pfault_select, | |
2170 | (u64 __user *)reg->addr); | |
2171 | break; | |
672550fb CB |
2172 | case KVM_REG_S390_PP: |
2173 | r = put_user(vcpu->arch.sie_block->pp, | |
2174 | (u64 __user *)reg->addr); | |
2175 | break; | |
afa45ff5 CB |
2176 | case KVM_REG_S390_GBEA: |
2177 | r = put_user(vcpu->arch.sie_block->gbea, | |
2178 | (u64 __user *)reg->addr); | |
2179 | break; | |
14eebd91 CO |
2180 | default: |
2181 | break; | |
2182 | } | |
2183 | ||
2184 | return r; | |
2185 | } | |
2186 | ||
2187 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
2188 | struct kvm_one_reg *reg) | |
2189 | { | |
2190 | int r = -EINVAL; | |
4287f247 | 2191 | __u64 val; |
14eebd91 CO |
2192 | |
2193 | switch (reg->id) { | |
29b7c71b CO |
2194 | case KVM_REG_S390_TODPR: |
2195 | r = get_user(vcpu->arch.sie_block->todpr, | |
2196 | (u32 __user *)reg->addr); | |
2197 | break; | |
2198 | case KVM_REG_S390_EPOCHDIFF: | |
2199 | r = get_user(vcpu->arch.sie_block->epoch, | |
2200 | (u64 __user *)reg->addr); | |
2201 | break; | |
46a6dd1c | 2202 | case KVM_REG_S390_CPU_TIMER: |
4287f247 DH |
2203 | r = get_user(val, (u64 __user *)reg->addr); |
2204 | if (!r) | |
2205 | kvm_s390_set_cpu_timer(vcpu, val); | |
46a6dd1c J |
2206 | break; |
2207 | case KVM_REG_S390_CLOCK_COMP: | |
2208 | r = get_user(vcpu->arch.sie_block->ckc, | |
2209 | (u64 __user *)reg->addr); | |
2210 | break; | |
536336c2 DD |
2211 | case KVM_REG_S390_PFTOKEN: |
2212 | r = get_user(vcpu->arch.pfault_token, | |
2213 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
2214 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2215 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
2216 | break; |
2217 | case KVM_REG_S390_PFCOMPARE: | |
2218 | r = get_user(vcpu->arch.pfault_compare, | |
2219 | (u64 __user *)reg->addr); | |
2220 | break; | |
2221 | case KVM_REG_S390_PFSELECT: | |
2222 | r = get_user(vcpu->arch.pfault_select, | |
2223 | (u64 __user *)reg->addr); | |
2224 | break; | |
672550fb CB |
2225 | case KVM_REG_S390_PP: |
2226 | r = get_user(vcpu->arch.sie_block->pp, | |
2227 | (u64 __user *)reg->addr); | |
2228 | break; | |
afa45ff5 CB |
2229 | case KVM_REG_S390_GBEA: |
2230 | r = get_user(vcpu->arch.sie_block->gbea, | |
2231 | (u64 __user *)reg->addr); | |
2232 | break; | |
14eebd91 CO |
2233 | default: |
2234 | break; | |
2235 | } | |
2236 | ||
2237 | return r; | |
2238 | } | |
b6d33834 | 2239 | |
b0c632db HC |
2240 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
2241 | { | |
b0c632db | 2242 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
2243 | return 0; |
2244 | } | |
2245 | ||
2246 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2247 | { | |
5a32c1af | 2248 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
2249 | return 0; |
2250 | } | |
2251 | ||
2252 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2253 | { | |
5a32c1af | 2254 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
2255 | return 0; |
2256 | } | |
2257 | ||
2258 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
2259 | struct kvm_sregs *sregs) | |
2260 | { | |
59674c1a | 2261 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 2262 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
b0c632db HC |
2263 | return 0; |
2264 | } | |
2265 | ||
2266 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
2267 | struct kvm_sregs *sregs) | |
2268 | { | |
59674c1a | 2269 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 2270 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
2271 | return 0; |
2272 | } | |
2273 | ||
2274 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2275 | { | |
4725c860 MS |
2276 | if (test_fp_ctl(fpu->fpc)) |
2277 | return -EINVAL; | |
e1788bb9 | 2278 | vcpu->run->s.regs.fpc = fpu->fpc; |
9abc2a08 | 2279 | if (MACHINE_HAS_VX) |
a7d4b8f2 DH |
2280 | convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs, |
2281 | (freg_t *) fpu->fprs); | |
9abc2a08 | 2282 | else |
a7d4b8f2 | 2283 | memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
b0c632db HC |
2284 | return 0; |
2285 | } | |
2286 | ||
2287 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2288 | { | |
9abc2a08 DH |
2289 | /* make sure we have the latest values */ |
2290 | save_fpu_regs(); | |
2291 | if (MACHINE_HAS_VX) | |
a7d4b8f2 DH |
2292 | convert_vx_to_fp((freg_t *) fpu->fprs, |
2293 | (__vector128 *) vcpu->run->s.regs.vrs); | |
9abc2a08 | 2294 | else |
a7d4b8f2 | 2295 | memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs)); |
e1788bb9 | 2296 | fpu->fpc = vcpu->run->s.regs.fpc; |
b0c632db HC |
2297 | return 0; |
2298 | } | |
2299 | ||
2300 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
2301 | { | |
2302 | int rc = 0; | |
2303 | ||
7a42fdc2 | 2304 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 2305 | rc = -EBUSY; |
d7b0b5eb CO |
2306 | else { |
2307 | vcpu->run->psw_mask = psw.mask; | |
2308 | vcpu->run->psw_addr = psw.addr; | |
2309 | } | |
b0c632db HC |
2310 | return rc; |
2311 | } | |
2312 | ||
2313 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
2314 | struct kvm_translation *tr) | |
2315 | { | |
2316 | return -EINVAL; /* not implemented yet */ | |
2317 | } | |
2318 | ||
27291e21 DH |
2319 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
2320 | KVM_GUESTDBG_USE_HW_BP | \ | |
2321 | KVM_GUESTDBG_ENABLE) | |
2322 | ||
d0bfb940 JK |
2323 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
2324 | struct kvm_guest_debug *dbg) | |
b0c632db | 2325 | { |
27291e21 DH |
2326 | int rc = 0; |
2327 | ||
2328 | vcpu->guest_debug = 0; | |
2329 | kvm_s390_clear_bp_data(vcpu); | |
2330 | ||
2de3bfc2 | 2331 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 | 2332 | return -EINVAL; |
89b5b4de DH |
2333 | if (!sclp.has_gpere) |
2334 | return -EINVAL; | |
27291e21 DH |
2335 | |
2336 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
2337 | vcpu->guest_debug = dbg->control; | |
2338 | /* enforce guest PER */ | |
805de8f4 | 2339 | atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2340 | |
2341 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
2342 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
2343 | } else { | |
805de8f4 | 2344 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2345 | vcpu->arch.guestdbg.last_bp = 0; |
2346 | } | |
2347 | ||
2348 | if (rc) { | |
2349 | vcpu->guest_debug = 0; | |
2350 | kvm_s390_clear_bp_data(vcpu); | |
805de8f4 | 2351 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2352 | } |
2353 | ||
2354 | return rc; | |
b0c632db HC |
2355 | } |
2356 | ||
62d9f0db MT |
2357 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
2358 | struct kvm_mp_state *mp_state) | |
2359 | { | |
6352e4d2 DH |
2360 | /* CHECK_STOP and LOAD are not supported yet */ |
2361 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
2362 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
2363 | } |
2364 | ||
2365 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
2366 | struct kvm_mp_state *mp_state) | |
2367 | { | |
6352e4d2 DH |
2368 | int rc = 0; |
2369 | ||
2370 | /* user space knows about this interface - let it control the state */ | |
2371 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
2372 | ||
2373 | switch (mp_state->mp_state) { | |
2374 | case KVM_MP_STATE_STOPPED: | |
2375 | kvm_s390_vcpu_stop(vcpu); | |
2376 | break; | |
2377 | case KVM_MP_STATE_OPERATING: | |
2378 | kvm_s390_vcpu_start(vcpu); | |
2379 | break; | |
2380 | case KVM_MP_STATE_LOAD: | |
2381 | case KVM_MP_STATE_CHECK_STOP: | |
2382 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
2383 | default: | |
2384 | rc = -ENXIO; | |
2385 | } | |
2386 | ||
2387 | return rc; | |
62d9f0db MT |
2388 | } |
2389 | ||
8ad35755 DH |
2390 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
2391 | { | |
2392 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
2393 | } | |
2394 | ||
2c70fe44 CB |
2395 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
2396 | { | |
8ad35755 | 2397 | retry: |
8e236546 | 2398 | kvm_s390_vcpu_request_handled(vcpu); |
586b7ccd CB |
2399 | if (!vcpu->requests) |
2400 | return 0; | |
2c70fe44 CB |
2401 | /* |
2402 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
b2d73b2a | 2403 | * guest prefix page. gmap_mprotect_notify will wait on the ptl lock. |
2c70fe44 CB |
2404 | * This ensures that the ipte instruction for this request has |
2405 | * already finished. We might race against a second unmapper that | |
2406 | * wants to set the blocking bit. Lets just retry the request loop. | |
2407 | */ | |
8ad35755 | 2408 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 | 2409 | int rc; |
b2d73b2a MS |
2410 | rc = gmap_mprotect_notify(vcpu->arch.gmap, |
2411 | kvm_s390_get_prefix(vcpu), | |
2412 | PAGE_SIZE * 2, PROT_WRITE); | |
aca411a4 JN |
2413 | if (rc) { |
2414 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
2c70fe44 | 2415 | return rc; |
aca411a4 | 2416 | } |
8ad35755 | 2417 | goto retry; |
2c70fe44 | 2418 | } |
8ad35755 | 2419 | |
d3d692c8 DH |
2420 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
2421 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
2422 | goto retry; | |
2423 | } | |
2424 | ||
8ad35755 DH |
2425 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
2426 | if (!ibs_enabled(vcpu)) { | |
2427 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
805de8f4 | 2428 | atomic_or(CPUSTAT_IBS, |
8ad35755 DH |
2429 | &vcpu->arch.sie_block->cpuflags); |
2430 | } | |
2431 | goto retry; | |
2c70fe44 | 2432 | } |
8ad35755 DH |
2433 | |
2434 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
2435 | if (ibs_enabled(vcpu)) { | |
2436 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
805de8f4 | 2437 | atomic_andnot(CPUSTAT_IBS, |
8ad35755 DH |
2438 | &vcpu->arch.sie_block->cpuflags); |
2439 | } | |
2440 | goto retry; | |
2441 | } | |
2442 | ||
6502a34c DH |
2443 | if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) { |
2444 | vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; | |
2445 | goto retry; | |
2446 | } | |
2447 | ||
0759d068 DH |
2448 | /* nothing to do, just clear the request */ |
2449 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
2450 | ||
2c70fe44 CB |
2451 | return 0; |
2452 | } | |
2453 | ||
25ed1675 DH |
2454 | void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod) |
2455 | { | |
2456 | struct kvm_vcpu *vcpu; | |
2457 | int i; | |
2458 | ||
2459 | mutex_lock(&kvm->lock); | |
2460 | preempt_disable(); | |
2461 | kvm->arch.epoch = tod - get_tod_clock(); | |
2462 | kvm_s390_vcpu_block_all(kvm); | |
2463 | kvm_for_each_vcpu(i, vcpu, kvm) | |
2464 | vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
2465 | kvm_s390_vcpu_unblock_all(kvm); | |
2466 | preempt_enable(); | |
2467 | mutex_unlock(&kvm->lock); | |
2468 | } | |
2469 | ||
fa576c58 TH |
2470 | /** |
2471 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
2472 | * @vcpu: The corresponding virtual cpu | |
2473 | * @gpa: Guest physical address | |
2474 | * @writable: Whether the page should be writable or not | |
2475 | * | |
2476 | * Make sure that a guest page has been faulted-in on the host. | |
2477 | * | |
2478 | * Return: Zero on success, negative error code otherwise. | |
2479 | */ | |
2480 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 2481 | { |
527e30b4 MS |
2482 | return gmap_fault(vcpu->arch.gmap, gpa, |
2483 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
2484 | } |
2485 | ||
3c038e6b DD |
2486 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
2487 | unsigned long token) | |
2488 | { | |
2489 | struct kvm_s390_interrupt inti; | |
383d0b05 | 2490 | struct kvm_s390_irq irq; |
3c038e6b DD |
2491 | |
2492 | if (start_token) { | |
383d0b05 JF |
2493 | irq.u.ext.ext_params2 = token; |
2494 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
2495 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
2496 | } else { |
2497 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 2498 | inti.parm64 = token; |
3c038e6b DD |
2499 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
2500 | } | |
2501 | } | |
2502 | ||
2503 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
2504 | struct kvm_async_pf *work) | |
2505 | { | |
2506 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
2507 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
2508 | } | |
2509 | ||
2510 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
2511 | struct kvm_async_pf *work) | |
2512 | { | |
2513 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
2514 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
2515 | } | |
2516 | ||
2517 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
2518 | struct kvm_async_pf *work) | |
2519 | { | |
2520 | /* s390 will always inject the page directly */ | |
2521 | } | |
2522 | ||
2523 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
2524 | { | |
2525 | /* | |
2526 | * s390 will always inject the page directly, | |
2527 | * but we still want check_async_completion to cleanup | |
2528 | */ | |
2529 | return true; | |
2530 | } | |
2531 | ||
2532 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
2533 | { | |
2534 | hva_t hva; | |
2535 | struct kvm_arch_async_pf arch; | |
2536 | int rc; | |
2537 | ||
2538 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
2539 | return 0; | |
2540 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
2541 | vcpu->arch.pfault_compare) | |
2542 | return 0; | |
2543 | if (psw_extint_disabled(vcpu)) | |
2544 | return 0; | |
9a022067 | 2545 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
2546 | return 0; |
2547 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
2548 | return 0; | |
2549 | if (!vcpu->arch.gmap->pfault_enabled) | |
2550 | return 0; | |
2551 | ||
81480cc1 HC |
2552 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
2553 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
2554 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
2555 | return 0; |
2556 | ||
2557 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
2558 | return rc; | |
2559 | } | |
2560 | ||
3fb4c40f | 2561 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 2562 | { |
3fb4c40f | 2563 | int rc, cpuflags; |
e168bf8d | 2564 | |
3c038e6b DD |
2565 | /* |
2566 | * On s390 notifications for arriving pages will be delivered directly | |
2567 | * to the guest but the house keeping for completed pfaults is | |
2568 | * handled outside the worker. | |
2569 | */ | |
2570 | kvm_check_async_pf_completion(vcpu); | |
2571 | ||
7ec7c8c7 CB |
2572 | vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14]; |
2573 | vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15]; | |
b0c632db HC |
2574 | |
2575 | if (need_resched()) | |
2576 | schedule(); | |
2577 | ||
d3a73acb | 2578 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
2579 | s390_handle_mcck(); |
2580 | ||
79395031 JF |
2581 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
2582 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
2583 | if (rc) | |
2584 | return rc; | |
2585 | } | |
0ff31867 | 2586 | |
2c70fe44 CB |
2587 | rc = kvm_s390_handle_requests(vcpu); |
2588 | if (rc) | |
2589 | return rc; | |
2590 | ||
27291e21 DH |
2591 | if (guestdbg_enabled(vcpu)) { |
2592 | kvm_s390_backup_guest_per_regs(vcpu); | |
2593 | kvm_s390_patch_guest_per_regs(vcpu); | |
2594 | } | |
2595 | ||
b0c632db | 2596 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
2597 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
2598 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
2599 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 2600 | |
3fb4c40f TH |
2601 | return 0; |
2602 | } | |
2603 | ||
492d8642 TH |
2604 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
2605 | { | |
56317920 DH |
2606 | struct kvm_s390_pgm_info pgm_info = { |
2607 | .code = PGM_ADDRESSING, | |
2608 | }; | |
2609 | u8 opcode, ilen; | |
492d8642 TH |
2610 | int rc; |
2611 | ||
2612 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
2613 | trace_kvm_s390_sie_fault(vcpu); | |
2614 | ||
2615 | /* | |
2616 | * We want to inject an addressing exception, which is defined as a | |
2617 | * suppressing or terminating exception. However, since we came here | |
2618 | * by a DAT access exception, the PSW still points to the faulting | |
2619 | * instruction since DAT exceptions are nullifying. So we've got | |
2620 | * to look up the current opcode to get the length of the instruction | |
2621 | * to be able to forward the PSW. | |
2622 | */ | |
3fa8cad7 | 2623 | rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1); |
56317920 | 2624 | ilen = insn_length(opcode); |
9b0d721a DH |
2625 | if (rc < 0) { |
2626 | return rc; | |
2627 | } else if (rc) { | |
2628 | /* Instruction-Fetching Exceptions - we can't detect the ilen. | |
2629 | * Forward by arbitrary ilc, injection will take care of | |
2630 | * nullification if necessary. | |
2631 | */ | |
2632 | pgm_info = vcpu->arch.pgm; | |
2633 | ilen = 4; | |
2634 | } | |
56317920 DH |
2635 | pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID; |
2636 | kvm_s390_forward_psw(vcpu, ilen); | |
2637 | return kvm_s390_inject_prog_irq(vcpu, &pgm_info); | |
492d8642 TH |
2638 | } |
2639 | ||
3fb4c40f TH |
2640 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
2641 | { | |
2b29a9fd DD |
2642 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
2643 | vcpu->arch.sie_block->icptcode); | |
2644 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
2645 | ||
27291e21 DH |
2646 | if (guestdbg_enabled(vcpu)) |
2647 | kvm_s390_restore_guest_per_regs(vcpu); | |
2648 | ||
7ec7c8c7 CB |
2649 | vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14; |
2650 | vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15; | |
71f116bf DH |
2651 | |
2652 | if (vcpu->arch.sie_block->icptcode > 0) { | |
2653 | int rc = kvm_handle_sie_intercept(vcpu); | |
2654 | ||
2655 | if (rc != -EOPNOTSUPP) | |
2656 | return rc; | |
2657 | vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2658 | vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
2659 | vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
2660 | vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2661 | return -EREMOTE; | |
2662 | } else if (exit_reason != -EFAULT) { | |
2663 | vcpu->stat.exit_null++; | |
2664 | return 0; | |
210b1607 TH |
2665 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
2666 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
2667 | vcpu->run->s390_ucontrol.trans_exc_code = | |
2668 | current->thread.gmap_addr; | |
2669 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
71f116bf | 2670 | return -EREMOTE; |
24eb3a82 | 2671 | } else if (current->thread.gmap_pfault) { |
3c038e6b | 2672 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 2673 | current->thread.gmap_pfault = 0; |
71f116bf DH |
2674 | if (kvm_arch_setup_async_pf(vcpu)) |
2675 | return 0; | |
2676 | return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1); | |
a76ccff6 | 2677 | } |
71f116bf | 2678 | return vcpu_post_run_fault_in_sie(vcpu); |
3fb4c40f TH |
2679 | } |
2680 | ||
2681 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
2682 | { | |
2683 | int rc, exit_reason; | |
2684 | ||
800c1065 TH |
2685 | /* |
2686 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
2687 | * ning the guest), so that memslots (and other stuff) are protected | |
2688 | */ | |
2689 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2690 | ||
a76ccff6 TH |
2691 | do { |
2692 | rc = vcpu_pre_run(vcpu); | |
2693 | if (rc) | |
2694 | break; | |
3fb4c40f | 2695 | |
800c1065 | 2696 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
2697 | /* |
2698 | * As PF_VCPU will be used in fault handler, between | |
2699 | * guest_enter and guest_exit should be no uaccess. | |
2700 | */ | |
0097d12e | 2701 | local_irq_disable(); |
6edaa530 | 2702 | guest_enter_irqoff(); |
db0758b2 | 2703 | __disable_cpu_timer_accounting(vcpu); |
0097d12e | 2704 | local_irq_enable(); |
a76ccff6 TH |
2705 | exit_reason = sie64a(vcpu->arch.sie_block, |
2706 | vcpu->run->s.regs.gprs); | |
0097d12e | 2707 | local_irq_disable(); |
db0758b2 | 2708 | __enable_cpu_timer_accounting(vcpu); |
6edaa530 | 2709 | guest_exit_irqoff(); |
0097d12e | 2710 | local_irq_enable(); |
800c1065 | 2711 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
2712 | |
2713 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 2714 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2715 | |
800c1065 | 2716 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2717 | return rc; |
b0c632db HC |
2718 | } |
2719 | ||
b028ee3e DH |
2720 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2721 | { | |
2722 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2723 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2724 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2725 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2726 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2727 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2728 | /* some control register changes require a tlb flush */ |
2729 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2730 | } |
2731 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
4287f247 | 2732 | kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm); |
b028ee3e DH |
2733 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; |
2734 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2735 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2736 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2737 | } | |
2738 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2739 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2740 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2741 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2742 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2743 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e | 2744 | } |
80cd8763 FZ |
2745 | /* |
2746 | * If userspace sets the riccb (e.g. after migration) to a valid state, | |
2747 | * we should enable RI here instead of doing the lazy enablement. | |
2748 | */ | |
2749 | if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) && | |
2750 | test_kvm_facility(vcpu->kvm, 64)) { | |
2751 | struct runtime_instr_cb *riccb = | |
2752 | (struct runtime_instr_cb *) &kvm_run->s.regs.riccb; | |
2753 | ||
2754 | if (riccb->valid) | |
2755 | vcpu->arch.sie_block->ecb3 |= 0x01; | |
2756 | } | |
31d8b8d4 CB |
2757 | save_access_regs(vcpu->arch.host_acrs); |
2758 | restore_access_regs(vcpu->run->s.regs.acrs); | |
e1788bb9 CB |
2759 | /* save host (userspace) fprs/vrs */ |
2760 | save_fpu_regs(); | |
2761 | vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; | |
2762 | vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; | |
2763 | if (MACHINE_HAS_VX) | |
2764 | current->thread.fpu.regs = vcpu->run->s.regs.vrs; | |
2765 | else | |
2766 | current->thread.fpu.regs = vcpu->run->s.regs.fprs; | |
2767 | current->thread.fpu.fpc = vcpu->run->s.regs.fpc; | |
2768 | if (test_fp_ctl(current->thread.fpu.fpc)) | |
2769 | /* User space provided an invalid FPC, let's clear it */ | |
2770 | current->thread.fpu.fpc = 0; | |
80cd8763 | 2771 | |
b028ee3e DH |
2772 | kvm_run->kvm_dirty_regs = 0; |
2773 | } | |
2774 | ||
2775 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2776 | { | |
2777 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2778 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2779 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2780 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
4287f247 | 2781 | kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu); |
b028ee3e DH |
2782 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; |
2783 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2784 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2785 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2786 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2787 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2788 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
31d8b8d4 CB |
2789 | save_access_regs(vcpu->run->s.regs.acrs); |
2790 | restore_access_regs(vcpu->arch.host_acrs); | |
e1788bb9 CB |
2791 | /* Save guest register state */ |
2792 | save_fpu_regs(); | |
2793 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; | |
2794 | /* Restore will be done lazily at return */ | |
2795 | current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; | |
2796 | current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; | |
2797 | ||
b028ee3e DH |
2798 | } |
2799 | ||
b0c632db HC |
2800 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2801 | { | |
8f2abe6a | 2802 | int rc; |
b0c632db HC |
2803 | sigset_t sigsaved; |
2804 | ||
460df4c1 PB |
2805 | if (kvm_run->immediate_exit) |
2806 | return -EINTR; | |
2807 | ||
27291e21 DH |
2808 | if (guestdbg_exit_pending(vcpu)) { |
2809 | kvm_s390_prepare_debug_exit(vcpu); | |
2810 | return 0; | |
2811 | } | |
2812 | ||
b0c632db HC |
2813 | if (vcpu->sigset_active) |
2814 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2815 | ||
6352e4d2 DH |
2816 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2817 | kvm_s390_vcpu_start(vcpu); | |
2818 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 2819 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
2820 | vcpu->vcpu_id); |
2821 | return -EINVAL; | |
2822 | } | |
b0c632db | 2823 | |
b028ee3e | 2824 | sync_regs(vcpu, kvm_run); |
db0758b2 | 2825 | enable_cpu_timer_accounting(vcpu); |
d7b0b5eb | 2826 | |
dab4079d | 2827 | might_fault(); |
a76ccff6 | 2828 | rc = __vcpu_run(vcpu); |
9ace903d | 2829 | |
b1d16c49 CE |
2830 | if (signal_pending(current) && !rc) { |
2831 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2832 | rc = -EINTR; |
b1d16c49 | 2833 | } |
8f2abe6a | 2834 | |
27291e21 DH |
2835 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2836 | kvm_s390_prepare_debug_exit(vcpu); | |
2837 | rc = 0; | |
2838 | } | |
2839 | ||
8f2abe6a | 2840 | if (rc == -EREMOTE) { |
71f116bf | 2841 | /* userspace support is needed, kvm_run has been prepared */ |
8f2abe6a CB |
2842 | rc = 0; |
2843 | } | |
b0c632db | 2844 | |
db0758b2 | 2845 | disable_cpu_timer_accounting(vcpu); |
b028ee3e | 2846 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2847 | |
b0c632db HC |
2848 | if (vcpu->sigset_active) |
2849 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2850 | ||
b0c632db | 2851 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2852 | return rc; |
b0c632db HC |
2853 | } |
2854 | ||
b0c632db HC |
2855 | /* |
2856 | * store status at address | |
2857 | * we use have two special cases: | |
2858 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2859 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2860 | */ | |
d0bce605 | 2861 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2862 | { |
092670cd | 2863 | unsigned char archmode = 1; |
9abc2a08 | 2864 | freg_t fprs[NUM_FPRS]; |
fda902cb | 2865 | unsigned int px; |
4287f247 | 2866 | u64 clkcomp, cputm; |
d0bce605 | 2867 | int rc; |
b0c632db | 2868 | |
d9a3a09a | 2869 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 HC |
2870 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2871 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2872 | return -EFAULT; |
d9a3a09a | 2873 | gpa = 0; |
d0bce605 HC |
2874 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
2875 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2876 | return -EFAULT; |
d9a3a09a MS |
2877 | gpa = px; |
2878 | } else | |
2879 | gpa -= __LC_FPREGS_SAVE_AREA; | |
9abc2a08 DH |
2880 | |
2881 | /* manually convert vector registers if necessary */ | |
2882 | if (MACHINE_HAS_VX) { | |
9522b37f | 2883 | convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); |
9abc2a08 DH |
2884 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, |
2885 | fprs, 128); | |
2886 | } else { | |
2887 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, | |
6fd8e67d | 2888 | vcpu->run->s.regs.fprs, 128); |
9abc2a08 | 2889 | } |
d9a3a09a | 2890 | rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA, |
d0bce605 | 2891 | vcpu->run->s.regs.gprs, 128); |
d9a3a09a | 2892 | rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA, |
d0bce605 | 2893 | &vcpu->arch.sie_block->gpsw, 16); |
d9a3a09a | 2894 | rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA, |
fda902cb | 2895 | &px, 4); |
d9a3a09a | 2896 | rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA, |
9abc2a08 | 2897 | &vcpu->run->s.regs.fpc, 4); |
d9a3a09a | 2898 | rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA, |
d0bce605 | 2899 | &vcpu->arch.sie_block->todpr, 4); |
4287f247 | 2900 | cputm = kvm_s390_get_cpu_timer(vcpu); |
d9a3a09a | 2901 | rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA, |
4287f247 | 2902 | &cputm, 8); |
178bd789 | 2903 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d9a3a09a | 2904 | rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA, |
d0bce605 | 2905 | &clkcomp, 8); |
d9a3a09a | 2906 | rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA, |
d0bce605 | 2907 | &vcpu->run->s.regs.acrs, 64); |
d9a3a09a | 2908 | rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA, |
d0bce605 HC |
2909 | &vcpu->arch.sie_block->gcr, 128); |
2910 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2911 | } |
2912 | ||
e879892c TH |
2913 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2914 | { | |
2915 | /* | |
2916 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
31d8b8d4 | 2917 | * switch in the run ioctl. Let's update our copies before we save |
e879892c TH |
2918 | * it into the save area |
2919 | */ | |
d0164ee2 | 2920 | save_fpu_regs(); |
9abc2a08 | 2921 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
e879892c TH |
2922 | save_access_regs(vcpu->run->s.regs.acrs); |
2923 | ||
2924 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2925 | } | |
2926 | ||
8ad35755 DH |
2927 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2928 | { | |
2929 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 2930 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
2931 | } |
2932 | ||
2933 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2934 | { | |
2935 | unsigned int i; | |
2936 | struct kvm_vcpu *vcpu; | |
2937 | ||
2938 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2939 | __disable_ibs_on_vcpu(vcpu); | |
2940 | } | |
2941 | } | |
2942 | ||
2943 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2944 | { | |
09a400e7 DH |
2945 | if (!sclp.has_ibs) |
2946 | return; | |
8ad35755 | 2947 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); |
8e236546 | 2948 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
2949 | } |
2950 | ||
6852d7b6 DH |
2951 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2952 | { | |
8ad35755 DH |
2953 | int i, online_vcpus, started_vcpus = 0; |
2954 | ||
2955 | if (!is_vcpu_stopped(vcpu)) | |
2956 | return; | |
2957 | ||
6852d7b6 | 2958 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2959 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2960 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2961 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2962 | ||
2963 | for (i = 0; i < online_vcpus; i++) { | |
2964 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2965 | started_vcpus++; | |
2966 | } | |
2967 | ||
2968 | if (started_vcpus == 0) { | |
2969 | /* we're the only active VCPU -> speed it up */ | |
2970 | __enable_ibs_on_vcpu(vcpu); | |
2971 | } else if (started_vcpus == 1) { | |
2972 | /* | |
2973 | * As we are starting a second VCPU, we have to disable | |
2974 | * the IBS facility on all VCPUs to remove potentially | |
2975 | * oustanding ENABLE requests. | |
2976 | */ | |
2977 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2978 | } | |
2979 | ||
805de8f4 | 2980 | atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2981 | /* |
2982 | * Another VCPU might have used IBS while we were offline. | |
2983 | * Let's play safe and flush the VCPU at startup. | |
2984 | */ | |
d3d692c8 | 2985 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2986 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2987 | return; |
6852d7b6 DH |
2988 | } |
2989 | ||
2990 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2991 | { | |
8ad35755 DH |
2992 | int i, online_vcpus, started_vcpus = 0; |
2993 | struct kvm_vcpu *started_vcpu = NULL; | |
2994 | ||
2995 | if (is_vcpu_stopped(vcpu)) | |
2996 | return; | |
2997 | ||
6852d7b6 | 2998 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2999 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 3000 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
3001 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
3002 | ||
32f5ff63 | 3003 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 3004 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 3005 | |
805de8f4 | 3006 | atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
3007 | __disable_ibs_on_vcpu(vcpu); |
3008 | ||
3009 | for (i = 0; i < online_vcpus; i++) { | |
3010 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
3011 | started_vcpus++; | |
3012 | started_vcpu = vcpu->kvm->vcpus[i]; | |
3013 | } | |
3014 | } | |
3015 | ||
3016 | if (started_vcpus == 1) { | |
3017 | /* | |
3018 | * As we only have one VCPU left, we want to enable the | |
3019 | * IBS facility for that VCPU to speed it up. | |
3020 | */ | |
3021 | __enable_ibs_on_vcpu(started_vcpu); | |
3022 | } | |
3023 | ||
433b9ee4 | 3024 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 3025 | return; |
6852d7b6 DH |
3026 | } |
3027 | ||
d6712df9 CH |
3028 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
3029 | struct kvm_enable_cap *cap) | |
3030 | { | |
3031 | int r; | |
3032 | ||
3033 | if (cap->flags) | |
3034 | return -EINVAL; | |
3035 | ||
3036 | switch (cap->cap) { | |
fa6b7fe9 CH |
3037 | case KVM_CAP_S390_CSS_SUPPORT: |
3038 | if (!vcpu->kvm->arch.css_support) { | |
3039 | vcpu->kvm->arch.css_support = 1; | |
c92ea7b9 | 3040 | VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
fa6b7fe9 CH |
3041 | trace_kvm_s390_enable_css(vcpu->kvm); |
3042 | } | |
3043 | r = 0; | |
3044 | break; | |
d6712df9 CH |
3045 | default: |
3046 | r = -EINVAL; | |
3047 | break; | |
3048 | } | |
3049 | return r; | |
3050 | } | |
3051 | ||
41408c28 TH |
3052 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
3053 | struct kvm_s390_mem_op *mop) | |
3054 | { | |
3055 | void __user *uaddr = (void __user *)mop->buf; | |
3056 | void *tmpbuf = NULL; | |
3057 | int r, srcu_idx; | |
3058 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
3059 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
3060 | ||
3061 | if (mop->flags & ~supported_flags) | |
3062 | return -EINVAL; | |
3063 | ||
3064 | if (mop->size > MEM_OP_MAX_SIZE) | |
3065 | return -E2BIG; | |
3066 | ||
3067 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
3068 | tmpbuf = vmalloc(mop->size); | |
3069 | if (!tmpbuf) | |
3070 | return -ENOMEM; | |
3071 | } | |
3072 | ||
3073 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
3074 | ||
3075 | switch (mop->op) { | |
3076 | case KVM_S390_MEMOP_LOGICAL_READ: | |
3077 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
3078 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
3079 | mop->size, GACC_FETCH); | |
41408c28 TH |
3080 | break; |
3081 | } | |
3082 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
3083 | if (r == 0) { | |
3084 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
3085 | r = -EFAULT; | |
3086 | } | |
3087 | break; | |
3088 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
3089 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
3090 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
3091 | mop->size, GACC_STORE); | |
41408c28 TH |
3092 | break; |
3093 | } | |
3094 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
3095 | r = -EFAULT; | |
3096 | break; | |
3097 | } | |
3098 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
3099 | break; | |
3100 | default: | |
3101 | r = -EINVAL; | |
3102 | } | |
3103 | ||
3104 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
3105 | ||
3106 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
3107 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
3108 | ||
3109 | vfree(tmpbuf); | |
3110 | return r; | |
3111 | } | |
3112 | ||
b0c632db HC |
3113 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3114 | unsigned int ioctl, unsigned long arg) | |
3115 | { | |
3116 | struct kvm_vcpu *vcpu = filp->private_data; | |
3117 | void __user *argp = (void __user *)arg; | |
800c1065 | 3118 | int idx; |
bc923cc9 | 3119 | long r; |
b0c632db | 3120 | |
93736624 | 3121 | switch (ioctl) { |
47b43c52 JF |
3122 | case KVM_S390_IRQ: { |
3123 | struct kvm_s390_irq s390irq; | |
3124 | ||
3125 | r = -EFAULT; | |
3126 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
3127 | break; | |
3128 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
3129 | break; | |
3130 | } | |
93736624 | 3131 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 3132 | struct kvm_s390_interrupt s390int; |
383d0b05 | 3133 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 3134 | |
93736624 | 3135 | r = -EFAULT; |
ba5c1e9b | 3136 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 3137 | break; |
383d0b05 JF |
3138 | if (s390int_to_s390irq(&s390int, &s390irq)) |
3139 | return -EINVAL; | |
3140 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 3141 | break; |
ba5c1e9b | 3142 | } |
b0c632db | 3143 | case KVM_S390_STORE_STATUS: |
800c1065 | 3144 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 3145 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 3146 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 3147 | break; |
b0c632db HC |
3148 | case KVM_S390_SET_INITIAL_PSW: { |
3149 | psw_t psw; | |
3150 | ||
bc923cc9 | 3151 | r = -EFAULT; |
b0c632db | 3152 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
3153 | break; |
3154 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
3155 | break; | |
b0c632db HC |
3156 | } |
3157 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
3158 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
3159 | break; | |
14eebd91 CO |
3160 | case KVM_SET_ONE_REG: |
3161 | case KVM_GET_ONE_REG: { | |
3162 | struct kvm_one_reg reg; | |
3163 | r = -EFAULT; | |
3164 | if (copy_from_user(®, argp, sizeof(reg))) | |
3165 | break; | |
3166 | if (ioctl == KVM_SET_ONE_REG) | |
3167 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
3168 | else | |
3169 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
3170 | break; | |
3171 | } | |
27e0393f CO |
3172 | #ifdef CONFIG_KVM_S390_UCONTROL |
3173 | case KVM_S390_UCAS_MAP: { | |
3174 | struct kvm_s390_ucas_mapping ucasmap; | |
3175 | ||
3176 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
3177 | r = -EFAULT; | |
3178 | break; | |
3179 | } | |
3180 | ||
3181 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
3182 | r = -EINVAL; | |
3183 | break; | |
3184 | } | |
3185 | ||
3186 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
3187 | ucasmap.vcpu_addr, ucasmap.length); | |
3188 | break; | |
3189 | } | |
3190 | case KVM_S390_UCAS_UNMAP: { | |
3191 | struct kvm_s390_ucas_mapping ucasmap; | |
3192 | ||
3193 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
3194 | r = -EFAULT; | |
3195 | break; | |
3196 | } | |
3197 | ||
3198 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
3199 | r = -EINVAL; | |
3200 | break; | |
3201 | } | |
3202 | ||
3203 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
3204 | ucasmap.length); | |
3205 | break; | |
3206 | } | |
3207 | #endif | |
ccc7910f | 3208 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 3209 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
3210 | break; |
3211 | } | |
d6712df9 CH |
3212 | case KVM_ENABLE_CAP: |
3213 | { | |
3214 | struct kvm_enable_cap cap; | |
3215 | r = -EFAULT; | |
3216 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3217 | break; | |
3218 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3219 | break; | |
3220 | } | |
41408c28 TH |
3221 | case KVM_S390_MEM_OP: { |
3222 | struct kvm_s390_mem_op mem_op; | |
3223 | ||
3224 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
3225 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
3226 | else | |
3227 | r = -EFAULT; | |
3228 | break; | |
3229 | } | |
816c7667 JF |
3230 | case KVM_S390_SET_IRQ_STATE: { |
3231 | struct kvm_s390_irq_state irq_state; | |
3232 | ||
3233 | r = -EFAULT; | |
3234 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
3235 | break; | |
3236 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
3237 | irq_state.len == 0 || | |
3238 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
3239 | r = -EINVAL; | |
3240 | break; | |
3241 | } | |
3242 | r = kvm_s390_set_irq_state(vcpu, | |
3243 | (void __user *) irq_state.buf, | |
3244 | irq_state.len); | |
3245 | break; | |
3246 | } | |
3247 | case KVM_S390_GET_IRQ_STATE: { | |
3248 | struct kvm_s390_irq_state irq_state; | |
3249 | ||
3250 | r = -EFAULT; | |
3251 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
3252 | break; | |
3253 | if (irq_state.len == 0) { | |
3254 | r = -EINVAL; | |
3255 | break; | |
3256 | } | |
3257 | r = kvm_s390_get_irq_state(vcpu, | |
3258 | (__u8 __user *) irq_state.buf, | |
3259 | irq_state.len); | |
3260 | break; | |
3261 | } | |
b0c632db | 3262 | default: |
3e6afcf1 | 3263 | r = -ENOTTY; |
b0c632db | 3264 | } |
bc923cc9 | 3265 | return r; |
b0c632db HC |
3266 | } |
3267 | ||
5b1c1493 CO |
3268 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3269 | { | |
3270 | #ifdef CONFIG_KVM_S390_UCONTROL | |
3271 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
3272 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
3273 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
3274 | get_page(vmf->page); | |
3275 | return 0; | |
3276 | } | |
3277 | #endif | |
3278 | return VM_FAULT_SIGBUS; | |
3279 | } | |
3280 | ||
5587027c AK |
3281 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
3282 | unsigned long npages) | |
db3fe4eb TY |
3283 | { |
3284 | return 0; | |
3285 | } | |
3286 | ||
b0c632db | 3287 | /* Section: memory related */ |
f7784b8e MT |
3288 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
3289 | struct kvm_memory_slot *memslot, | |
09170a49 | 3290 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 3291 | enum kvm_mr_change change) |
b0c632db | 3292 | { |
dd2887e7 NW |
3293 | /* A few sanity checks. We can have memory slots which have to be |
3294 | located/ended at a segment boundary (1MB). The memory in userland is | |
3295 | ok to be fragmented into various different vmas. It is okay to mmap() | |
3296 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 3297 | |
598841ca | 3298 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
3299 | return -EINVAL; |
3300 | ||
598841ca | 3301 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
3302 | return -EINVAL; |
3303 | ||
a3a92c31 DD |
3304 | if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit) |
3305 | return -EINVAL; | |
3306 | ||
f7784b8e MT |
3307 | return 0; |
3308 | } | |
3309 | ||
3310 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 3311 | const struct kvm_userspace_memory_region *mem, |
8482644a | 3312 | const struct kvm_memory_slot *old, |
f36f3f28 | 3313 | const struct kvm_memory_slot *new, |
8482644a | 3314 | enum kvm_mr_change change) |
f7784b8e | 3315 | { |
f7850c92 | 3316 | int rc; |
f7784b8e | 3317 | |
2cef4deb CB |
3318 | /* If the basics of the memslot do not change, we do not want |
3319 | * to update the gmap. Every update causes several unnecessary | |
3320 | * segment translation exceptions. This is usually handled just | |
3321 | * fine by the normal fault handler + gmap, but it will also | |
3322 | * cause faults on the prefix page of running guest CPUs. | |
3323 | */ | |
3324 | if (old->userspace_addr == mem->userspace_addr && | |
3325 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
3326 | old->npages * PAGE_SIZE == mem->memory_size) | |
3327 | return; | |
598841ca CO |
3328 | |
3329 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
3330 | mem->guest_phys_addr, mem->memory_size); | |
3331 | if (rc) | |
ea2cdd27 | 3332 | pr_warn("failed to commit memory region\n"); |
598841ca | 3333 | return; |
b0c632db HC |
3334 | } |
3335 | ||
60a37709 AY |
3336 | static inline unsigned long nonhyp_mask(int i) |
3337 | { | |
3338 | unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30; | |
3339 | ||
3340 | return 0x0000ffffffffffffUL >> (nonhyp_fai << 4); | |
3341 | } | |
3342 | ||
3491caf2 CB |
3343 | void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) |
3344 | { | |
3345 | vcpu->valid_wakeup = false; | |
3346 | } | |
3347 | ||
b0c632db HC |
3348 | static int __init kvm_s390_init(void) |
3349 | { | |
60a37709 AY |
3350 | int i; |
3351 | ||
07197fd0 DH |
3352 | if (!sclp.has_sief2) { |
3353 | pr_info("SIE not available\n"); | |
3354 | return -ENODEV; | |
3355 | } | |
3356 | ||
60a37709 AY |
3357 | for (i = 0; i < 16; i++) |
3358 | kvm_s390_fac_list_mask[i] |= | |
3359 | S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i); | |
3360 | ||
9d8d5786 | 3361 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
3362 | } |
3363 | ||
3364 | static void __exit kvm_s390_exit(void) | |
3365 | { | |
3366 | kvm_exit(); | |
3367 | } | |
3368 | ||
3369 | module_init(kvm_s390_init); | |
3370 | module_exit(kvm_s390_exit); | |
566af940 CH |
3371 | |
3372 | /* | |
3373 | * Enable autoloading of the kvm module. | |
3374 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
3375 | * since x86 takes a different approach. | |
3376 | */ | |
3377 | #include <linux/miscdevice.h> | |
3378 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
3379 | MODULE_ALIAS("devname:kvm"); |