Commit | Line | Data |
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b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
15f36ebd | 14 | * Jason J. Herne <jjherne@us.ibm.com> |
b0c632db HC |
15 | */ |
16 | ||
17 | #include <linux/compiler.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/fs.h> | |
ca872302 | 20 | #include <linux/hrtimer.h> |
b0c632db HC |
21 | #include <linux/init.h> |
22 | #include <linux/kvm.h> | |
23 | #include <linux/kvm_host.h> | |
b2d73b2a | 24 | #include <linux/mman.h> |
b0c632db | 25 | #include <linux/module.h> |
a374e892 | 26 | #include <linux/random.h> |
b0c632db | 27 | #include <linux/slab.h> |
ba5c1e9b | 28 | #include <linux/timer.h> |
41408c28 | 29 | #include <linux/vmalloc.h> |
15c9705f | 30 | #include <linux/bitmap.h> |
cbb870c8 | 31 | #include <asm/asm-offsets.h> |
b0c632db | 32 | #include <asm/lowcore.h> |
fd5ada04 | 33 | #include <asm/stp.h> |
b0c632db | 34 | #include <asm/pgtable.h> |
1e133ab2 | 35 | #include <asm/gmap.h> |
f5daba1d | 36 | #include <asm/nmi.h> |
a0616cde | 37 | #include <asm/switch_to.h> |
6d3da241 | 38 | #include <asm/isc.h> |
1526bf9c | 39 | #include <asm/sclp.h> |
0a763c78 | 40 | #include <asm/cpacf.h> |
221bb8a4 | 41 | #include <asm/timex.h> |
8f2abe6a | 42 | #include "kvm-s390.h" |
b0c632db HC |
43 | #include "gaccess.h" |
44 | ||
ea2cdd27 DH |
45 | #define KMSG_COMPONENT "kvm-s390" |
46 | #undef pr_fmt | |
47 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
48 | ||
5786fffa CH |
49 | #define CREATE_TRACE_POINTS |
50 | #include "trace.h" | |
ade38c31 | 51 | #include "trace-s390.h" |
5786fffa | 52 | |
41408c28 | 53 | #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
816c7667 JF |
54 | #define LOCAL_IRQS 32 |
55 | #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ | |
56 | (KVM_MAX_VCPUS + LOCAL_IRQS)) | |
41408c28 | 57 | |
b0c632db HC |
58 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
59 | ||
60 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
61 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 62 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
63 | { "exit_validity", VCPU_STAT(exit_validity) }, |
64 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
65 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
66 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b | 67 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
9ec6de19 | 68 | { "exit_pei", VCPU_STAT(exit_pei) }, |
ba5c1e9b CO |
69 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, |
70 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
a011eeb2 | 71 | { "exit_operation_exception", VCPU_STAT(exit_operation_exception) }, |
f7819512 | 72 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 73 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 74 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ce2e4f0b | 75 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 76 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 77 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
78 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
79 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 80 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 81 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
82 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
83 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
84 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
85 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
86 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
87 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
88 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 89 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
90 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
91 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
92 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
93 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
94 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 95 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
96 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
97 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 98 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
99 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
100 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 101 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
95ca2cb5 | 102 | { "instruction_sthyi", VCPU_STAT(instruction_sthyi) }, |
a3508fbe | 103 | { "instruction_sie", VCPU_STAT(instruction_sie) }, |
5288fbf0 | 104 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 105 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 106 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 107 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
108 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
109 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 110 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
111 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
112 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 113 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
114 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
115 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
116 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
117 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
118 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
119 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 120 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 121 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 122 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
175a5c9e CB |
123 | { "diagnose_258", VCPU_STAT(diagnose_258) }, |
124 | { "diagnose_308", VCPU_STAT(diagnose_308) }, | |
125 | { "diagnose_500", VCPU_STAT(diagnose_500) }, | |
b0c632db HC |
126 | { NULL } |
127 | }; | |
128 | ||
a411edf1 DH |
129 | /* allow nested virtualization in KVM (if enabled by user space) */ |
130 | static int nested; | |
131 | module_param(nested, int, S_IRUGO); | |
132 | MODULE_PARM_DESC(nested, "Nested virtualization support"); | |
133 | ||
9d8d5786 | 134 | /* upper facilities limit for kvm */ |
f6c1d359 | 135 | unsigned long kvm_s390_fac_list_mask[16] = { FACILITIES_KVM }; |
b0c632db | 136 | |
9d8d5786 | 137 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 138 | { |
9d8d5786 MM |
139 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
140 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
141 | } |
142 | ||
15c9705f DH |
143 | /* available cpu features supported by kvm */ |
144 | static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); | |
0a763c78 DH |
145 | /* available subfunctions indicated via query / "test bit" */ |
146 | static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc; | |
15c9705f | 147 | |
9d8d5786 | 148 | static struct gmap_notifier gmap_notifier; |
a3508fbe | 149 | static struct gmap_notifier vsie_gmap_notifier; |
78f26131 | 150 | debug_info_t *kvm_s390_dbf; |
9d8d5786 | 151 | |
b0c632db | 152 | /* Section: not file related */ |
13a34e06 | 153 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
154 | { |
155 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 156 | return 0; |
b0c632db HC |
157 | } |
158 | ||
414d3b07 MS |
159 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
160 | unsigned long end); | |
2c70fe44 | 161 | |
fdf03650 FZ |
162 | /* |
163 | * This callback is executed during stop_machine(). All CPUs are therefore | |
164 | * temporarily stopped. In order not to change guest behavior, we have to | |
165 | * disable preemption whenever we touch the epoch of kvm and the VCPUs, | |
166 | * so a CPU won't be stopped while calculating with the epoch. | |
167 | */ | |
168 | static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, | |
169 | void *v) | |
170 | { | |
171 | struct kvm *kvm; | |
172 | struct kvm_vcpu *vcpu; | |
173 | int i; | |
174 | unsigned long long *delta = v; | |
175 | ||
176 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
177 | kvm->arch.epoch -= *delta; | |
178 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
179 | vcpu->arch.sie_block->epoch -= *delta; | |
db0758b2 DH |
180 | if (vcpu->arch.cputm_enabled) |
181 | vcpu->arch.cputm_start += *delta; | |
91473b48 DH |
182 | if (vcpu->arch.vsie_block) |
183 | vcpu->arch.vsie_block->epoch -= *delta; | |
fdf03650 FZ |
184 | } |
185 | } | |
186 | return NOTIFY_OK; | |
187 | } | |
188 | ||
189 | static struct notifier_block kvm_clock_notifier = { | |
190 | .notifier_call = kvm_clock_sync, | |
191 | }; | |
192 | ||
b0c632db HC |
193 | int kvm_arch_hardware_setup(void) |
194 | { | |
2c70fe44 | 195 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
b2d73b2a | 196 | gmap_register_pte_notifier(&gmap_notifier); |
a3508fbe DH |
197 | vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier; |
198 | gmap_register_pte_notifier(&vsie_gmap_notifier); | |
fdf03650 FZ |
199 | atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
200 | &kvm_clock_notifier); | |
b0c632db HC |
201 | return 0; |
202 | } | |
203 | ||
204 | void kvm_arch_hardware_unsetup(void) | |
205 | { | |
b2d73b2a | 206 | gmap_unregister_pte_notifier(&gmap_notifier); |
a3508fbe | 207 | gmap_unregister_pte_notifier(&vsie_gmap_notifier); |
fdf03650 FZ |
208 | atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
209 | &kvm_clock_notifier); | |
b0c632db HC |
210 | } |
211 | ||
22be5a13 DH |
212 | static void allow_cpu_feat(unsigned long nr) |
213 | { | |
214 | set_bit_inv(nr, kvm_s390_available_cpu_feat); | |
215 | } | |
216 | ||
0a763c78 DH |
217 | static inline int plo_test_bit(unsigned char nr) |
218 | { | |
219 | register unsigned long r0 asm("0") = (unsigned long) nr | 0x100; | |
220 | int cc = 3; /* subfunction not available */ | |
221 | ||
222 | asm volatile( | |
223 | /* Parameter registers are ignored for "test bit" */ | |
224 | " plo 0,0,0,0(0)\n" | |
225 | " ipm %0\n" | |
226 | " srl %0,28\n" | |
227 | : "=d" (cc) | |
228 | : "d" (r0) | |
229 | : "cc"); | |
230 | return cc == 0; | |
231 | } | |
232 | ||
22be5a13 DH |
233 | static void kvm_s390_cpu_feat_init(void) |
234 | { | |
0a763c78 DH |
235 | int i; |
236 | ||
237 | for (i = 0; i < 256; ++i) { | |
238 | if (plo_test_bit(i)) | |
239 | kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7); | |
240 | } | |
241 | ||
242 | if (test_facility(28)) /* TOD-clock steering */ | |
221bb8a4 LT |
243 | ptff(kvm_s390_available_subfunc.ptff, |
244 | sizeof(kvm_s390_available_subfunc.ptff), | |
245 | PTFF_QAF); | |
0a763c78 DH |
246 | |
247 | if (test_facility(17)) { /* MSA */ | |
69c0e360 MS |
248 | __cpacf_query(CPACF_KMAC, (cpacf_mask_t *) |
249 | kvm_s390_available_subfunc.kmac); | |
250 | __cpacf_query(CPACF_KMC, (cpacf_mask_t *) | |
251 | kvm_s390_available_subfunc.kmc); | |
252 | __cpacf_query(CPACF_KM, (cpacf_mask_t *) | |
253 | kvm_s390_available_subfunc.km); | |
254 | __cpacf_query(CPACF_KIMD, (cpacf_mask_t *) | |
255 | kvm_s390_available_subfunc.kimd); | |
256 | __cpacf_query(CPACF_KLMD, (cpacf_mask_t *) | |
257 | kvm_s390_available_subfunc.klmd); | |
0a763c78 DH |
258 | } |
259 | if (test_facility(76)) /* MSA3 */ | |
69c0e360 MS |
260 | __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *) |
261 | kvm_s390_available_subfunc.pckmo); | |
0a763c78 | 262 | if (test_facility(77)) { /* MSA4 */ |
69c0e360 MS |
263 | __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *) |
264 | kvm_s390_available_subfunc.kmctr); | |
265 | __cpacf_query(CPACF_KMF, (cpacf_mask_t *) | |
266 | kvm_s390_available_subfunc.kmf); | |
267 | __cpacf_query(CPACF_KMO, (cpacf_mask_t *) | |
268 | kvm_s390_available_subfunc.kmo); | |
269 | __cpacf_query(CPACF_PCC, (cpacf_mask_t *) | |
270 | kvm_s390_available_subfunc.pcc); | |
0a763c78 DH |
271 | } |
272 | if (test_facility(57)) /* MSA5 */ | |
69c0e360 MS |
273 | __cpacf_query(CPACF_PPNO, (cpacf_mask_t *) |
274 | kvm_s390_available_subfunc.ppno); | |
0a763c78 | 275 | |
22be5a13 DH |
276 | if (MACHINE_HAS_ESOP) |
277 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP); | |
a3508fbe DH |
278 | /* |
279 | * We need SIE support, ESOP (PROT_READ protection for gmap_shadow), | |
280 | * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing). | |
281 | */ | |
282 | if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao || | |
a411edf1 | 283 | !test_facility(3) || !nested) |
a3508fbe DH |
284 | return; |
285 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2); | |
19c439b5 DH |
286 | if (sclp.has_64bscao) |
287 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO); | |
0615a326 DH |
288 | if (sclp.has_siif) |
289 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF); | |
77d18f6d DH |
290 | if (sclp.has_gpere) |
291 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE); | |
a1b7b9b2 DH |
292 | if (sclp.has_gsls) |
293 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS); | |
5630a8e8 DH |
294 | if (sclp.has_ib) |
295 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB); | |
13ee3f67 DH |
296 | if (sclp.has_cei) |
297 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI); | |
7fd7f39d DH |
298 | if (sclp.has_ibs) |
299 | allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS); | |
5d3876a8 DH |
300 | /* |
301 | * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make | |
302 | * all skey handling functions read/set the skey from the PGSTE | |
303 | * instead of the real storage key. | |
304 | * | |
305 | * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make | |
306 | * pages being detected as preserved although they are resident. | |
307 | * | |
308 | * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will | |
309 | * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY. | |
310 | * | |
311 | * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and | |
312 | * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be | |
313 | * correctly shadowed. We can do that for the PGSTE but not for PTE.I. | |
314 | * | |
315 | * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We | |
316 | * cannot easily shadow the SCA because of the ipte lock. | |
317 | */ | |
22be5a13 DH |
318 | } |
319 | ||
b0c632db HC |
320 | int kvm_arch_init(void *opaque) |
321 | { | |
78f26131 CB |
322 | kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
323 | if (!kvm_s390_dbf) | |
324 | return -ENOMEM; | |
325 | ||
326 | if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) { | |
327 | debug_unregister(kvm_s390_dbf); | |
328 | return -ENOMEM; | |
329 | } | |
330 | ||
22be5a13 DH |
331 | kvm_s390_cpu_feat_init(); |
332 | ||
84877d93 CH |
333 | /* Register floating interrupt controller interface. */ |
334 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
335 | } |
336 | ||
78f26131 CB |
337 | void kvm_arch_exit(void) |
338 | { | |
339 | debug_unregister(kvm_s390_dbf); | |
340 | } | |
341 | ||
b0c632db HC |
342 | /* Section: device related */ |
343 | long kvm_arch_dev_ioctl(struct file *filp, | |
344 | unsigned int ioctl, unsigned long arg) | |
345 | { | |
346 | if (ioctl == KVM_S390_ENABLE_SIE) | |
347 | return s390_enable_sie(); | |
348 | return -EINVAL; | |
349 | } | |
350 | ||
784aa3d7 | 351 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 352 | { |
d7b0b5eb CO |
353 | int r; |
354 | ||
2bd0ac4e | 355 | switch (ext) { |
d7b0b5eb | 356 | case KVM_CAP_S390_PSW: |
b6cf8788 | 357 | case KVM_CAP_S390_GMAP: |
52e16b18 | 358 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
359 | #ifdef CONFIG_KVM_S390_UCONTROL |
360 | case KVM_CAP_S390_UCONTROL: | |
361 | #endif | |
3c038e6b | 362 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 363 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 364 | case KVM_CAP_ONE_REG: |
d6712df9 | 365 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 366 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 367 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 368 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 369 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 370 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 371 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 372 | case KVM_CAP_MP_STATE: |
47b43c52 | 373 | case KVM_CAP_S390_INJECT_IRQ: |
2444b352 | 374 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 375 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 376 | case KVM_CAP_S390_SKEYS: |
816c7667 | 377 | case KVM_CAP_S390_IRQ_STATE: |
6502a34c | 378 | case KVM_CAP_S390_USER_INSTR0: |
d7b0b5eb CO |
379 | r = 1; |
380 | break; | |
41408c28 TH |
381 | case KVM_CAP_S390_MEM_OP: |
382 | r = MEM_OP_MAX_SIZE; | |
383 | break; | |
e726b1bd CB |
384 | case KVM_CAP_NR_VCPUS: |
385 | case KVM_CAP_MAX_VCPUS: | |
76a6dd72 | 386 | r = KVM_S390_BSCA_CPU_SLOTS; |
a6940674 DH |
387 | if (!kvm_s390_use_sca_entries()) |
388 | r = KVM_MAX_VCPUS; | |
389 | else if (sclp.has_esca && sclp.has_64bscao) | |
76a6dd72 | 390 | r = KVM_S390_ESCA_CPU_SLOTS; |
e726b1bd | 391 | break; |
e1e2e605 NW |
392 | case KVM_CAP_NR_MEMSLOTS: |
393 | r = KVM_USER_MEM_SLOTS; | |
394 | break; | |
1526bf9c | 395 | case KVM_CAP_S390_COW: |
abf09bed | 396 | r = MACHINE_HAS_ESOP; |
1526bf9c | 397 | break; |
68c55750 EF |
398 | case KVM_CAP_S390_VECTOR_REGISTERS: |
399 | r = MACHINE_HAS_VX; | |
400 | break; | |
c6e5f166 FZ |
401 | case KVM_CAP_S390_RI: |
402 | r = test_facility(64); | |
403 | break; | |
2bd0ac4e | 404 | default: |
d7b0b5eb | 405 | r = 0; |
2bd0ac4e | 406 | } |
d7b0b5eb | 407 | return r; |
b0c632db HC |
408 | } |
409 | ||
15f36ebd JH |
410 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
411 | struct kvm_memory_slot *memslot) | |
412 | { | |
413 | gfn_t cur_gfn, last_gfn; | |
414 | unsigned long address; | |
415 | struct gmap *gmap = kvm->arch.gmap; | |
416 | ||
15f36ebd JH |
417 | /* Loop over all guest pages */ |
418 | last_gfn = memslot->base_gfn + memslot->npages; | |
419 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
420 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
421 | ||
1e133ab2 | 422 | if (test_and_clear_guest_dirty(gmap->mm, address)) |
15f36ebd | 423 | mark_page_dirty(kvm, cur_gfn); |
1763f8d0 CB |
424 | if (fatal_signal_pending(current)) |
425 | return; | |
70c88a00 | 426 | cond_resched(); |
15f36ebd | 427 | } |
15f36ebd JH |
428 | } |
429 | ||
b0c632db | 430 | /* Section: vm related */ |
a6e2f683 ED |
431 | static void sca_del_vcpu(struct kvm_vcpu *vcpu); |
432 | ||
b0c632db HC |
433 | /* |
434 | * Get (and clear) the dirty memory log for a memory slot. | |
435 | */ | |
436 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
437 | struct kvm_dirty_log *log) | |
438 | { | |
15f36ebd JH |
439 | int r; |
440 | unsigned long n; | |
9f6b8029 | 441 | struct kvm_memslots *slots; |
15f36ebd JH |
442 | struct kvm_memory_slot *memslot; |
443 | int is_dirty = 0; | |
444 | ||
445 | mutex_lock(&kvm->slots_lock); | |
446 | ||
447 | r = -EINVAL; | |
448 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
449 | goto out; | |
450 | ||
9f6b8029 PB |
451 | slots = kvm_memslots(kvm); |
452 | memslot = id_to_memslot(slots, log->slot); | |
15f36ebd JH |
453 | r = -ENOENT; |
454 | if (!memslot->dirty_bitmap) | |
455 | goto out; | |
456 | ||
457 | kvm_s390_sync_dirty_log(kvm, memslot); | |
458 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
459 | if (r) | |
460 | goto out; | |
461 | ||
462 | /* Clear the dirty log */ | |
463 | if (is_dirty) { | |
464 | n = kvm_dirty_bitmap_bytes(memslot); | |
465 | memset(memslot->dirty_bitmap, 0, n); | |
466 | } | |
467 | r = 0; | |
468 | out: | |
469 | mutex_unlock(&kvm->slots_lock); | |
470 | return r; | |
b0c632db HC |
471 | } |
472 | ||
6502a34c DH |
473 | static void icpt_operexc_on_all_vcpus(struct kvm *kvm) |
474 | { | |
475 | unsigned int i; | |
476 | struct kvm_vcpu *vcpu; | |
477 | ||
478 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
479 | kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu); | |
480 | } | |
481 | } | |
482 | ||
d938dc55 CH |
483 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
484 | { | |
485 | int r; | |
486 | ||
487 | if (cap->flags) | |
488 | return -EINVAL; | |
489 | ||
490 | switch (cap->cap) { | |
84223598 | 491 | case KVM_CAP_S390_IRQCHIP: |
c92ea7b9 | 492 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
84223598 CH |
493 | kvm->arch.use_irqchip = 1; |
494 | r = 0; | |
495 | break; | |
2444b352 | 496 | case KVM_CAP_S390_USER_SIGP: |
c92ea7b9 | 497 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
2444b352 DH |
498 | kvm->arch.user_sigp = 1; |
499 | r = 0; | |
500 | break; | |
68c55750 | 501 | case KVM_CAP_S390_VECTOR_REGISTERS: |
5967c17b | 502 | mutex_lock(&kvm->lock); |
a03825bb | 503 | if (kvm->created_vcpus) { |
5967c17b DH |
504 | r = -EBUSY; |
505 | } else if (MACHINE_HAS_VX) { | |
c54f0d6a DH |
506 | set_kvm_facility(kvm->arch.model.fac_mask, 129); |
507 | set_kvm_facility(kvm->arch.model.fac_list, 129); | |
18280d8b MM |
508 | r = 0; |
509 | } else | |
510 | r = -EINVAL; | |
5967c17b | 511 | mutex_unlock(&kvm->lock); |
c92ea7b9 CB |
512 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
513 | r ? "(not available)" : "(success)"); | |
68c55750 | 514 | break; |
c6e5f166 FZ |
515 | case KVM_CAP_S390_RI: |
516 | r = -EINVAL; | |
517 | mutex_lock(&kvm->lock); | |
a03825bb | 518 | if (kvm->created_vcpus) { |
c6e5f166 FZ |
519 | r = -EBUSY; |
520 | } else if (test_facility(64)) { | |
c54f0d6a DH |
521 | set_kvm_facility(kvm->arch.model.fac_mask, 64); |
522 | set_kvm_facility(kvm->arch.model.fac_list, 64); | |
c6e5f166 FZ |
523 | r = 0; |
524 | } | |
525 | mutex_unlock(&kvm->lock); | |
526 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s", | |
527 | r ? "(not available)" : "(success)"); | |
528 | break; | |
e44fc8c9 | 529 | case KVM_CAP_S390_USER_STSI: |
c92ea7b9 | 530 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
e44fc8c9 ET |
531 | kvm->arch.user_stsi = 1; |
532 | r = 0; | |
533 | break; | |
6502a34c DH |
534 | case KVM_CAP_S390_USER_INSTR0: |
535 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0"); | |
536 | kvm->arch.user_instr0 = 1; | |
537 | icpt_operexc_on_all_vcpus(kvm); | |
538 | r = 0; | |
539 | break; | |
d938dc55 CH |
540 | default: |
541 | r = -EINVAL; | |
542 | break; | |
543 | } | |
544 | return r; | |
545 | } | |
546 | ||
8c0a7ce6 DD |
547 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
548 | { | |
549 | int ret; | |
550 | ||
551 | switch (attr->attr) { | |
552 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
553 | ret = 0; | |
c92ea7b9 | 554 | VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
a3a92c31 DD |
555 | kvm->arch.mem_limit); |
556 | if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr)) | |
8c0a7ce6 DD |
557 | ret = -EFAULT; |
558 | break; | |
559 | default: | |
560 | ret = -ENXIO; | |
561 | break; | |
562 | } | |
563 | return ret; | |
564 | } | |
565 | ||
566 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
567 | { |
568 | int ret; | |
569 | unsigned int idx; | |
570 | switch (attr->attr) { | |
571 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
f9cbd9b0 | 572 | ret = -ENXIO; |
c24cc9c8 | 573 | if (!sclp.has_cmma) |
e6db1d61 DD |
574 | break; |
575 | ||
4f718eab | 576 | ret = -EBUSY; |
c92ea7b9 | 577 | VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
4f718eab | 578 | mutex_lock(&kvm->lock); |
a03825bb | 579 | if (!kvm->created_vcpus) { |
4f718eab DD |
580 | kvm->arch.use_cmma = 1; |
581 | ret = 0; | |
582 | } | |
583 | mutex_unlock(&kvm->lock); | |
584 | break; | |
585 | case KVM_S390_VM_MEM_CLR_CMMA: | |
f9cbd9b0 DH |
586 | ret = -ENXIO; |
587 | if (!sclp.has_cmma) | |
588 | break; | |
c3489155 DD |
589 | ret = -EINVAL; |
590 | if (!kvm->arch.use_cmma) | |
591 | break; | |
592 | ||
c92ea7b9 | 593 | VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
4f718eab DD |
594 | mutex_lock(&kvm->lock); |
595 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 596 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
597 | srcu_read_unlock(&kvm->srcu, idx); |
598 | mutex_unlock(&kvm->lock); | |
599 | ret = 0; | |
600 | break; | |
8c0a7ce6 DD |
601 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
602 | unsigned long new_limit; | |
603 | ||
604 | if (kvm_is_ucontrol(kvm)) | |
605 | return -EINVAL; | |
606 | ||
607 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
608 | return -EFAULT; | |
609 | ||
a3a92c31 DD |
610 | if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT && |
611 | new_limit > kvm->arch.mem_limit) | |
8c0a7ce6 DD |
612 | return -E2BIG; |
613 | ||
a3a92c31 DD |
614 | if (!new_limit) |
615 | return -EINVAL; | |
616 | ||
6ea427bb | 617 | /* gmap_create takes last usable address */ |
a3a92c31 DD |
618 | if (new_limit != KVM_S390_NO_MEM_LIMIT) |
619 | new_limit -= 1; | |
620 | ||
8c0a7ce6 DD |
621 | ret = -EBUSY; |
622 | mutex_lock(&kvm->lock); | |
a03825bb | 623 | if (!kvm->created_vcpus) { |
6ea427bb MS |
624 | /* gmap_create will round the limit up */ |
625 | struct gmap *new = gmap_create(current->mm, new_limit); | |
8c0a7ce6 DD |
626 | |
627 | if (!new) { | |
628 | ret = -ENOMEM; | |
629 | } else { | |
6ea427bb | 630 | gmap_remove(kvm->arch.gmap); |
8c0a7ce6 DD |
631 | new->private = kvm; |
632 | kvm->arch.gmap = new; | |
633 | ret = 0; | |
634 | } | |
635 | } | |
636 | mutex_unlock(&kvm->lock); | |
a3a92c31 DD |
637 | VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit); |
638 | VM_EVENT(kvm, 3, "New guest asce: 0x%pK", | |
639 | (void *) kvm->arch.gmap->asce); | |
8c0a7ce6 DD |
640 | break; |
641 | } | |
4f718eab DD |
642 | default: |
643 | ret = -ENXIO; | |
644 | break; | |
645 | } | |
646 | return ret; | |
647 | } | |
648 | ||
a374e892 TK |
649 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
650 | ||
651 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
652 | { | |
653 | struct kvm_vcpu *vcpu; | |
654 | int i; | |
655 | ||
9d8d5786 | 656 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
657 | return -EINVAL; |
658 | ||
659 | mutex_lock(&kvm->lock); | |
660 | switch (attr->attr) { | |
661 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
662 | get_random_bytes( | |
663 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
664 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
665 | kvm->arch.crypto.aes_kw = 1; | |
c92ea7b9 | 666 | VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
a374e892 TK |
667 | break; |
668 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
669 | get_random_bytes( | |
670 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
671 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
672 | kvm->arch.crypto.dea_kw = 1; | |
c92ea7b9 | 673 | VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
a374e892 TK |
674 | break; |
675 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
676 | kvm->arch.crypto.aes_kw = 0; | |
677 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
678 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
c92ea7b9 | 679 | VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
a374e892 TK |
680 | break; |
681 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
682 | kvm->arch.crypto.dea_kw = 0; | |
683 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
684 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
c92ea7b9 | 685 | VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
a374e892 TK |
686 | break; |
687 | default: | |
688 | mutex_unlock(&kvm->lock); | |
689 | return -ENXIO; | |
690 | } | |
691 | ||
692 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
693 | kvm_s390_vcpu_crypto_setup(vcpu); | |
694 | exit_sie(vcpu); | |
695 | } | |
696 | mutex_unlock(&kvm->lock); | |
697 | return 0; | |
698 | } | |
699 | ||
72f25020 JH |
700 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
701 | { | |
702 | u8 gtod_high; | |
703 | ||
704 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
705 | sizeof(gtod_high))) | |
706 | return -EFAULT; | |
707 | ||
708 | if (gtod_high != 0) | |
709 | return -EINVAL; | |
58c383c6 | 710 | VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
711 | |
712 | return 0; | |
713 | } | |
714 | ||
715 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
716 | { | |
5a3d883a | 717 | u64 gtod; |
72f25020 JH |
718 | |
719 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
720 | return -EFAULT; | |
721 | ||
25ed1675 | 722 | kvm_s390_set_tod_clock(kvm, gtod); |
58c383c6 | 723 | VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod); |
72f25020 JH |
724 | return 0; |
725 | } | |
726 | ||
727 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
728 | { | |
729 | int ret; | |
730 | ||
731 | if (attr->flags) | |
732 | return -EINVAL; | |
733 | ||
734 | switch (attr->attr) { | |
735 | case KVM_S390_VM_TOD_HIGH: | |
736 | ret = kvm_s390_set_tod_high(kvm, attr); | |
737 | break; | |
738 | case KVM_S390_VM_TOD_LOW: | |
739 | ret = kvm_s390_set_tod_low(kvm, attr); | |
740 | break; | |
741 | default: | |
742 | ret = -ENXIO; | |
743 | break; | |
744 | } | |
745 | return ret; | |
746 | } | |
747 | ||
748 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
749 | { | |
750 | u8 gtod_high = 0; | |
751 | ||
752 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
753 | sizeof(gtod_high))) | |
754 | return -EFAULT; | |
58c383c6 | 755 | VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
756 | |
757 | return 0; | |
758 | } | |
759 | ||
760 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
761 | { | |
5a3d883a | 762 | u64 gtod; |
72f25020 | 763 | |
60417fcc | 764 | gtod = kvm_s390_get_tod_clock_fast(kvm); |
72f25020 JH |
765 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
766 | return -EFAULT; | |
58c383c6 | 767 | VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
72f25020 JH |
768 | |
769 | return 0; | |
770 | } | |
771 | ||
772 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
773 | { | |
774 | int ret; | |
775 | ||
776 | if (attr->flags) | |
777 | return -EINVAL; | |
778 | ||
779 | switch (attr->attr) { | |
780 | case KVM_S390_VM_TOD_HIGH: | |
781 | ret = kvm_s390_get_tod_high(kvm, attr); | |
782 | break; | |
783 | case KVM_S390_VM_TOD_LOW: | |
784 | ret = kvm_s390_get_tod_low(kvm, attr); | |
785 | break; | |
786 | default: | |
787 | ret = -ENXIO; | |
788 | break; | |
789 | } | |
790 | return ret; | |
791 | } | |
792 | ||
658b6eda MM |
793 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
794 | { | |
795 | struct kvm_s390_vm_cpu_processor *proc; | |
053dd230 | 796 | u16 lowest_ibc, unblocked_ibc; |
658b6eda MM |
797 | int ret = 0; |
798 | ||
799 | mutex_lock(&kvm->lock); | |
a03825bb | 800 | if (kvm->created_vcpus) { |
658b6eda MM |
801 | ret = -EBUSY; |
802 | goto out; | |
803 | } | |
804 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
805 | if (!proc) { | |
806 | ret = -ENOMEM; | |
807 | goto out; | |
808 | } | |
809 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
810 | sizeof(*proc))) { | |
9bb0ec09 | 811 | kvm->arch.model.cpuid = proc->cpuid; |
053dd230 DH |
812 | lowest_ibc = sclp.ibc >> 16 & 0xfff; |
813 | unblocked_ibc = sclp.ibc & 0xfff; | |
0487c44d | 814 | if (lowest_ibc && proc->ibc) { |
053dd230 DH |
815 | if (proc->ibc > unblocked_ibc) |
816 | kvm->arch.model.ibc = unblocked_ibc; | |
817 | else if (proc->ibc < lowest_ibc) | |
818 | kvm->arch.model.ibc = lowest_ibc; | |
819 | else | |
820 | kvm->arch.model.ibc = proc->ibc; | |
821 | } | |
c54f0d6a | 822 | memcpy(kvm->arch.model.fac_list, proc->fac_list, |
658b6eda MM |
823 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
824 | } else | |
825 | ret = -EFAULT; | |
826 | kfree(proc); | |
827 | out: | |
828 | mutex_unlock(&kvm->lock); | |
829 | return ret; | |
830 | } | |
831 | ||
15c9705f DH |
832 | static int kvm_s390_set_processor_feat(struct kvm *kvm, |
833 | struct kvm_device_attr *attr) | |
834 | { | |
835 | struct kvm_s390_vm_cpu_feat data; | |
836 | int ret = -EBUSY; | |
837 | ||
838 | if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data))) | |
839 | return -EFAULT; | |
840 | if (!bitmap_subset((unsigned long *) data.feat, | |
841 | kvm_s390_available_cpu_feat, | |
842 | KVM_S390_VM_CPU_FEAT_NR_BITS)) | |
843 | return -EINVAL; | |
844 | ||
845 | mutex_lock(&kvm->lock); | |
846 | if (!atomic_read(&kvm->online_vcpus)) { | |
847 | bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat, | |
848 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
849 | ret = 0; | |
850 | } | |
851 | mutex_unlock(&kvm->lock); | |
852 | return ret; | |
853 | } | |
854 | ||
0a763c78 DH |
855 | static int kvm_s390_set_processor_subfunc(struct kvm *kvm, |
856 | struct kvm_device_attr *attr) | |
857 | { | |
858 | /* | |
859 | * Once supported by kernel + hw, we have to store the subfunctions | |
860 | * in kvm->arch and remember that user space configured them. | |
861 | */ | |
862 | return -ENXIO; | |
863 | } | |
864 | ||
658b6eda MM |
865 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
866 | { | |
867 | int ret = -ENXIO; | |
868 | ||
869 | switch (attr->attr) { | |
870 | case KVM_S390_VM_CPU_PROCESSOR: | |
871 | ret = kvm_s390_set_processor(kvm, attr); | |
872 | break; | |
15c9705f DH |
873 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
874 | ret = kvm_s390_set_processor_feat(kvm, attr); | |
875 | break; | |
0a763c78 DH |
876 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
877 | ret = kvm_s390_set_processor_subfunc(kvm, attr); | |
878 | break; | |
658b6eda MM |
879 | } |
880 | return ret; | |
881 | } | |
882 | ||
883 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
884 | { | |
885 | struct kvm_s390_vm_cpu_processor *proc; | |
886 | int ret = 0; | |
887 | ||
888 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
889 | if (!proc) { | |
890 | ret = -ENOMEM; | |
891 | goto out; | |
892 | } | |
9bb0ec09 | 893 | proc->cpuid = kvm->arch.model.cpuid; |
658b6eda | 894 | proc->ibc = kvm->arch.model.ibc; |
c54f0d6a DH |
895 | memcpy(&proc->fac_list, kvm->arch.model.fac_list, |
896 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda MM |
897 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
898 | ret = -EFAULT; | |
899 | kfree(proc); | |
900 | out: | |
901 | return ret; | |
902 | } | |
903 | ||
904 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
905 | { | |
906 | struct kvm_s390_vm_cpu_machine *mach; | |
907 | int ret = 0; | |
908 | ||
909 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
910 | if (!mach) { | |
911 | ret = -ENOMEM; | |
912 | goto out; | |
913 | } | |
914 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 915 | mach->ibc = sclp.ibc; |
c54f0d6a | 916 | memcpy(&mach->fac_mask, kvm->arch.model.fac_mask, |
981467c9 | 917 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda | 918 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 919 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
920 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
921 | ret = -EFAULT; | |
922 | kfree(mach); | |
923 | out: | |
924 | return ret; | |
925 | } | |
926 | ||
15c9705f DH |
927 | static int kvm_s390_get_processor_feat(struct kvm *kvm, |
928 | struct kvm_device_attr *attr) | |
929 | { | |
930 | struct kvm_s390_vm_cpu_feat data; | |
931 | ||
932 | bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat, | |
933 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
934 | if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) | |
935 | return -EFAULT; | |
936 | return 0; | |
937 | } | |
938 | ||
939 | static int kvm_s390_get_machine_feat(struct kvm *kvm, | |
940 | struct kvm_device_attr *attr) | |
941 | { | |
942 | struct kvm_s390_vm_cpu_feat data; | |
943 | ||
944 | bitmap_copy((unsigned long *) data.feat, | |
945 | kvm_s390_available_cpu_feat, | |
946 | KVM_S390_VM_CPU_FEAT_NR_BITS); | |
947 | if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) | |
948 | return -EFAULT; | |
949 | return 0; | |
950 | } | |
951 | ||
0a763c78 DH |
952 | static int kvm_s390_get_processor_subfunc(struct kvm *kvm, |
953 | struct kvm_device_attr *attr) | |
954 | { | |
955 | /* | |
956 | * Once we can actually configure subfunctions (kernel + hw support), | |
957 | * we have to check if they were already set by user space, if so copy | |
958 | * them from kvm->arch. | |
959 | */ | |
960 | return -ENXIO; | |
961 | } | |
962 | ||
963 | static int kvm_s390_get_machine_subfunc(struct kvm *kvm, | |
964 | struct kvm_device_attr *attr) | |
965 | { | |
966 | if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc, | |
967 | sizeof(struct kvm_s390_vm_cpu_subfunc))) | |
968 | return -EFAULT; | |
969 | return 0; | |
970 | } | |
658b6eda MM |
971 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
972 | { | |
973 | int ret = -ENXIO; | |
974 | ||
975 | switch (attr->attr) { | |
976 | case KVM_S390_VM_CPU_PROCESSOR: | |
977 | ret = kvm_s390_get_processor(kvm, attr); | |
978 | break; | |
979 | case KVM_S390_VM_CPU_MACHINE: | |
980 | ret = kvm_s390_get_machine(kvm, attr); | |
981 | break; | |
15c9705f DH |
982 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
983 | ret = kvm_s390_get_processor_feat(kvm, attr); | |
984 | break; | |
985 | case KVM_S390_VM_CPU_MACHINE_FEAT: | |
986 | ret = kvm_s390_get_machine_feat(kvm, attr); | |
987 | break; | |
0a763c78 DH |
988 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
989 | ret = kvm_s390_get_processor_subfunc(kvm, attr); | |
990 | break; | |
991 | case KVM_S390_VM_CPU_MACHINE_SUBFUNC: | |
992 | ret = kvm_s390_get_machine_subfunc(kvm, attr); | |
993 | break; | |
658b6eda MM |
994 | } |
995 | return ret; | |
996 | } | |
997 | ||
f2061656 DD |
998 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
999 | { | |
1000 | int ret; | |
1001 | ||
1002 | switch (attr->group) { | |
4f718eab | 1003 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 1004 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 1005 | break; |
72f25020 JH |
1006 | case KVM_S390_VM_TOD: |
1007 | ret = kvm_s390_set_tod(kvm, attr); | |
1008 | break; | |
658b6eda MM |
1009 | case KVM_S390_VM_CPU_MODEL: |
1010 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
1011 | break; | |
a374e892 TK |
1012 | case KVM_S390_VM_CRYPTO: |
1013 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
1014 | break; | |
f2061656 DD |
1015 | default: |
1016 | ret = -ENXIO; | |
1017 | break; | |
1018 | } | |
1019 | ||
1020 | return ret; | |
1021 | } | |
1022 | ||
1023 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
1024 | { | |
8c0a7ce6 DD |
1025 | int ret; |
1026 | ||
1027 | switch (attr->group) { | |
1028 | case KVM_S390_VM_MEM_CTRL: | |
1029 | ret = kvm_s390_get_mem_control(kvm, attr); | |
1030 | break; | |
72f25020 JH |
1031 | case KVM_S390_VM_TOD: |
1032 | ret = kvm_s390_get_tod(kvm, attr); | |
1033 | break; | |
658b6eda MM |
1034 | case KVM_S390_VM_CPU_MODEL: |
1035 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
1036 | break; | |
8c0a7ce6 DD |
1037 | default: |
1038 | ret = -ENXIO; | |
1039 | break; | |
1040 | } | |
1041 | ||
1042 | return ret; | |
f2061656 DD |
1043 | } |
1044 | ||
1045 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
1046 | { | |
1047 | int ret; | |
1048 | ||
1049 | switch (attr->group) { | |
4f718eab DD |
1050 | case KVM_S390_VM_MEM_CTRL: |
1051 | switch (attr->attr) { | |
1052 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
1053 | case KVM_S390_VM_MEM_CLR_CMMA: | |
f9cbd9b0 DH |
1054 | ret = sclp.has_cmma ? 0 : -ENXIO; |
1055 | break; | |
8c0a7ce6 | 1056 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
1057 | ret = 0; |
1058 | break; | |
1059 | default: | |
1060 | ret = -ENXIO; | |
1061 | break; | |
1062 | } | |
1063 | break; | |
72f25020 JH |
1064 | case KVM_S390_VM_TOD: |
1065 | switch (attr->attr) { | |
1066 | case KVM_S390_VM_TOD_LOW: | |
1067 | case KVM_S390_VM_TOD_HIGH: | |
1068 | ret = 0; | |
1069 | break; | |
1070 | default: | |
1071 | ret = -ENXIO; | |
1072 | break; | |
1073 | } | |
1074 | break; | |
658b6eda MM |
1075 | case KVM_S390_VM_CPU_MODEL: |
1076 | switch (attr->attr) { | |
1077 | case KVM_S390_VM_CPU_PROCESSOR: | |
1078 | case KVM_S390_VM_CPU_MACHINE: | |
15c9705f DH |
1079 | case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
1080 | case KVM_S390_VM_CPU_MACHINE_FEAT: | |
0a763c78 | 1081 | case KVM_S390_VM_CPU_MACHINE_SUBFUNC: |
658b6eda MM |
1082 | ret = 0; |
1083 | break; | |
0a763c78 DH |
1084 | /* configuring subfunctions is not supported yet */ |
1085 | case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: | |
658b6eda MM |
1086 | default: |
1087 | ret = -ENXIO; | |
1088 | break; | |
1089 | } | |
1090 | break; | |
a374e892 TK |
1091 | case KVM_S390_VM_CRYPTO: |
1092 | switch (attr->attr) { | |
1093 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
1094 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
1095 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
1096 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
1097 | ret = 0; | |
1098 | break; | |
1099 | default: | |
1100 | ret = -ENXIO; | |
1101 | break; | |
1102 | } | |
1103 | break; | |
f2061656 DD |
1104 | default: |
1105 | ret = -ENXIO; | |
1106 | break; | |
1107 | } | |
1108 | ||
1109 | return ret; | |
1110 | } | |
1111 | ||
30ee2a98 JH |
1112 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
1113 | { | |
1114 | uint8_t *keys; | |
1115 | uint64_t hva; | |
30ee2a98 JH |
1116 | int i, r = 0; |
1117 | ||
1118 | if (args->flags != 0) | |
1119 | return -EINVAL; | |
1120 | ||
1121 | /* Is this guest using storage keys? */ | |
1122 | if (!mm_use_skey(current->mm)) | |
1123 | return KVM_S390_GET_SKEYS_NONE; | |
1124 | ||
1125 | /* Enforce sane limit on memory allocation */ | |
1126 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
1127 | return -EINVAL; | |
1128 | ||
1129 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
1130 | GFP_KERNEL | __GFP_NOWARN); | |
1131 | if (!keys) | |
1132 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
1133 | if (!keys) | |
1134 | return -ENOMEM; | |
1135 | ||
d3ed1cee | 1136 | down_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1137 | for (i = 0; i < args->count; i++) { |
1138 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1139 | if (kvm_is_error_hva(hva)) { | |
1140 | r = -EFAULT; | |
d3ed1cee | 1141 | break; |
30ee2a98 JH |
1142 | } |
1143 | ||
154c8c19 DH |
1144 | r = get_guest_storage_key(current->mm, hva, &keys[i]); |
1145 | if (r) | |
d3ed1cee | 1146 | break; |
30ee2a98 | 1147 | } |
d3ed1cee MS |
1148 | up_read(¤t->mm->mmap_sem); |
1149 | ||
1150 | if (!r) { | |
1151 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
1152 | sizeof(uint8_t) * args->count); | |
1153 | if (r) | |
1154 | r = -EFAULT; | |
30ee2a98 JH |
1155 | } |
1156 | ||
30ee2a98 JH |
1157 | kvfree(keys); |
1158 | return r; | |
1159 | } | |
1160 | ||
1161 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
1162 | { | |
1163 | uint8_t *keys; | |
1164 | uint64_t hva; | |
1165 | int i, r = 0; | |
1166 | ||
1167 | if (args->flags != 0) | |
1168 | return -EINVAL; | |
1169 | ||
1170 | /* Enforce sane limit on memory allocation */ | |
1171 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
1172 | return -EINVAL; | |
1173 | ||
1174 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
1175 | GFP_KERNEL | __GFP_NOWARN); | |
1176 | if (!keys) | |
1177 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
1178 | if (!keys) | |
1179 | return -ENOMEM; | |
1180 | ||
1181 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
1182 | sizeof(uint8_t) * args->count); | |
1183 | if (r) { | |
1184 | r = -EFAULT; | |
1185 | goto out; | |
1186 | } | |
1187 | ||
1188 | /* Enable storage key handling for the guest */ | |
14d4a425 DD |
1189 | r = s390_enable_skey(); |
1190 | if (r) | |
1191 | goto out; | |
30ee2a98 | 1192 | |
d3ed1cee | 1193 | down_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1194 | for (i = 0; i < args->count; i++) { |
1195 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
1196 | if (kvm_is_error_hva(hva)) { | |
1197 | r = -EFAULT; | |
d3ed1cee | 1198 | break; |
30ee2a98 JH |
1199 | } |
1200 | ||
1201 | /* Lowest order bit is reserved */ | |
1202 | if (keys[i] & 0x01) { | |
1203 | r = -EINVAL; | |
d3ed1cee | 1204 | break; |
30ee2a98 JH |
1205 | } |
1206 | ||
fe69eabf | 1207 | r = set_guest_storage_key(current->mm, hva, keys[i], 0); |
30ee2a98 | 1208 | if (r) |
d3ed1cee | 1209 | break; |
30ee2a98 | 1210 | } |
d3ed1cee | 1211 | up_read(¤t->mm->mmap_sem); |
30ee2a98 JH |
1212 | out: |
1213 | kvfree(keys); | |
1214 | return r; | |
1215 | } | |
1216 | ||
b0c632db HC |
1217 | long kvm_arch_vm_ioctl(struct file *filp, |
1218 | unsigned int ioctl, unsigned long arg) | |
1219 | { | |
1220 | struct kvm *kvm = filp->private_data; | |
1221 | void __user *argp = (void __user *)arg; | |
f2061656 | 1222 | struct kvm_device_attr attr; |
b0c632db HC |
1223 | int r; |
1224 | ||
1225 | switch (ioctl) { | |
ba5c1e9b CO |
1226 | case KVM_S390_INTERRUPT: { |
1227 | struct kvm_s390_interrupt s390int; | |
1228 | ||
1229 | r = -EFAULT; | |
1230 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
1231 | break; | |
1232 | r = kvm_s390_inject_vm(kvm, &s390int); | |
1233 | break; | |
1234 | } | |
d938dc55 CH |
1235 | case KVM_ENABLE_CAP: { |
1236 | struct kvm_enable_cap cap; | |
1237 | r = -EFAULT; | |
1238 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1239 | break; | |
1240 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
1241 | break; | |
1242 | } | |
84223598 CH |
1243 | case KVM_CREATE_IRQCHIP: { |
1244 | struct kvm_irq_routing_entry routing; | |
1245 | ||
1246 | r = -EINVAL; | |
1247 | if (kvm->arch.use_irqchip) { | |
1248 | /* Set up dummy routing. */ | |
1249 | memset(&routing, 0, sizeof(routing)); | |
152b2839 | 1250 | r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
84223598 CH |
1251 | } |
1252 | break; | |
1253 | } | |
f2061656 DD |
1254 | case KVM_SET_DEVICE_ATTR: { |
1255 | r = -EFAULT; | |
1256 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1257 | break; | |
1258 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
1259 | break; | |
1260 | } | |
1261 | case KVM_GET_DEVICE_ATTR: { | |
1262 | r = -EFAULT; | |
1263 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1264 | break; | |
1265 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
1266 | break; | |
1267 | } | |
1268 | case KVM_HAS_DEVICE_ATTR: { | |
1269 | r = -EFAULT; | |
1270 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
1271 | break; | |
1272 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
1273 | break; | |
1274 | } | |
30ee2a98 JH |
1275 | case KVM_S390_GET_SKEYS: { |
1276 | struct kvm_s390_skeys args; | |
1277 | ||
1278 | r = -EFAULT; | |
1279 | if (copy_from_user(&args, argp, | |
1280 | sizeof(struct kvm_s390_skeys))) | |
1281 | break; | |
1282 | r = kvm_s390_get_skeys(kvm, &args); | |
1283 | break; | |
1284 | } | |
1285 | case KVM_S390_SET_SKEYS: { | |
1286 | struct kvm_s390_skeys args; | |
1287 | ||
1288 | r = -EFAULT; | |
1289 | if (copy_from_user(&args, argp, | |
1290 | sizeof(struct kvm_s390_skeys))) | |
1291 | break; | |
1292 | r = kvm_s390_set_skeys(kvm, &args); | |
1293 | break; | |
1294 | } | |
b0c632db | 1295 | default: |
367e1319 | 1296 | r = -ENOTTY; |
b0c632db HC |
1297 | } |
1298 | ||
1299 | return r; | |
1300 | } | |
1301 | ||
45c9b47c TK |
1302 | static int kvm_s390_query_ap_config(u8 *config) |
1303 | { | |
1304 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 1305 | u32 cc = 0; |
45c9b47c | 1306 | |
86044c8c | 1307 | memset(config, 0, 128); |
45c9b47c TK |
1308 | asm volatile( |
1309 | "lgr 0,%1\n" | |
1310 | "lgr 2,%2\n" | |
1311 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 1312 | "0: ipm %0\n" |
45c9b47c | 1313 | "srl %0,28\n" |
86044c8c CB |
1314 | "1:\n" |
1315 | EX_TABLE(0b, 1b) | |
1316 | : "+r" (cc) | |
45c9b47c TK |
1317 | : "r" (fcn_code), "r" (config) |
1318 | : "cc", "0", "2", "memory" | |
1319 | ); | |
1320 | ||
1321 | return cc; | |
1322 | } | |
1323 | ||
1324 | static int kvm_s390_apxa_installed(void) | |
1325 | { | |
1326 | u8 config[128]; | |
1327 | int cc; | |
1328 | ||
a6aacc3f | 1329 | if (test_facility(12)) { |
45c9b47c TK |
1330 | cc = kvm_s390_query_ap_config(config); |
1331 | ||
1332 | if (cc) | |
1333 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
1334 | else | |
1335 | return config[0] & 0x40; | |
1336 | } | |
1337 | ||
1338 | return 0; | |
1339 | } | |
1340 | ||
1341 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
1342 | { | |
1343 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
1344 | ||
1345 | if (kvm_s390_apxa_installed()) | |
1346 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
1347 | else | |
1348 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
1349 | } | |
1350 | ||
9bb0ec09 | 1351 | static u64 kvm_s390_get_initial_cpuid(void) |
9d8d5786 | 1352 | { |
9bb0ec09 DH |
1353 | struct cpuid cpuid; |
1354 | ||
1355 | get_cpu_id(&cpuid); | |
1356 | cpuid.version = 0xff; | |
1357 | return *((u64 *) &cpuid); | |
9d8d5786 MM |
1358 | } |
1359 | ||
c54f0d6a | 1360 | static void kvm_s390_crypto_init(struct kvm *kvm) |
5102ee87 | 1361 | { |
9d8d5786 | 1362 | if (!test_kvm_facility(kvm, 76)) |
c54f0d6a | 1363 | return; |
5102ee87 | 1364 | |
c54f0d6a | 1365 | kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; |
45c9b47c | 1366 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1367 | |
ed6f76b4 TK |
1368 | /* Enable AES/DEA protected key functions by default */ |
1369 | kvm->arch.crypto.aes_kw = 1; | |
1370 | kvm->arch.crypto.dea_kw = 1; | |
1371 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1372 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1373 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1374 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
5102ee87 TK |
1375 | } |
1376 | ||
7d43bafc ED |
1377 | static void sca_dispose(struct kvm *kvm) |
1378 | { | |
1379 | if (kvm->arch.use_esca) | |
5e044315 | 1380 | free_pages_exact(kvm->arch.sca, sizeof(struct esca_block)); |
7d43bafc ED |
1381 | else |
1382 | free_page((unsigned long)(kvm->arch.sca)); | |
1383 | kvm->arch.sca = NULL; | |
1384 | } | |
1385 | ||
e08b9637 | 1386 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1387 | { |
76a6dd72 | 1388 | gfp_t alloc_flags = GFP_KERNEL; |
9d8d5786 | 1389 | int i, rc; |
b0c632db | 1390 | char debug_name[16]; |
f6c137ff | 1391 | static unsigned long sca_offset; |
b0c632db | 1392 | |
e08b9637 CO |
1393 | rc = -EINVAL; |
1394 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1395 | if (type & ~KVM_VM_S390_UCONTROL) | |
1396 | goto out_err; | |
1397 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1398 | goto out_err; | |
1399 | #else | |
1400 | if (type) | |
1401 | goto out_err; | |
1402 | #endif | |
1403 | ||
b0c632db HC |
1404 | rc = s390_enable_sie(); |
1405 | if (rc) | |
d89f5eff | 1406 | goto out_err; |
b0c632db | 1407 | |
b290411a CO |
1408 | rc = -ENOMEM; |
1409 | ||
7d0a5e62 JF |
1410 | ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500); |
1411 | ||
7d43bafc | 1412 | kvm->arch.use_esca = 0; /* start with basic SCA */ |
76a6dd72 DH |
1413 | if (!sclp.has_64bscao) |
1414 | alloc_flags |= GFP_DMA; | |
5e044315 | 1415 | rwlock_init(&kvm->arch.sca_lock); |
76a6dd72 | 1416 | kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags); |
b0c632db | 1417 | if (!kvm->arch.sca) |
d89f5eff | 1418 | goto out_err; |
f6c137ff | 1419 | spin_lock(&kvm_lock); |
c5c2c393 | 1420 | sca_offset += 16; |
bc784cce | 1421 | if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE) |
c5c2c393 | 1422 | sca_offset = 0; |
bc784cce ED |
1423 | kvm->arch.sca = (struct bsca_block *) |
1424 | ((char *) kvm->arch.sca + sca_offset); | |
f6c137ff | 1425 | spin_unlock(&kvm_lock); |
b0c632db HC |
1426 | |
1427 | sprintf(debug_name, "kvm-%u", current->pid); | |
1428 | ||
1cb9cf72 | 1429 | kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
b0c632db | 1430 | if (!kvm->arch.dbf) |
40f5b735 | 1431 | goto out_err; |
b0c632db | 1432 | |
c54f0d6a DH |
1433 | kvm->arch.sie_page2 = |
1434 | (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1435 | if (!kvm->arch.sie_page2) | |
40f5b735 | 1436 | goto out_err; |
9d8d5786 | 1437 | |
fb5bf93f | 1438 | /* Populate the facility mask initially. */ |
c54f0d6a | 1439 | memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 1440 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
1441 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1442 | if (i < kvm_s390_fac_list_mask_size()) | |
c54f0d6a | 1443 | kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1444 | else |
c54f0d6a | 1445 | kvm->arch.model.fac_mask[i] = 0UL; |
9d8d5786 MM |
1446 | } |
1447 | ||
981467c9 | 1448 | /* Populate the facility list initially. */ |
c54f0d6a DH |
1449 | kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list; |
1450 | memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask, | |
981467c9 MM |
1451 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
1452 | ||
95ca2cb5 JF |
1453 | set_kvm_facility(kvm->arch.model.fac_mask, 74); |
1454 | set_kvm_facility(kvm->arch.model.fac_list, 74); | |
1455 | ||
9bb0ec09 | 1456 | kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid(); |
37c5f6c8 | 1457 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1458 | |
c54f0d6a | 1459 | kvm_s390_crypto_init(kvm); |
5102ee87 | 1460 | |
ba5c1e9b | 1461 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1462 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1463 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1464 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1465 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1466 | |
b0c632db | 1467 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
78f26131 | 1468 | VM_EVENT(kvm, 3, "vm created with type %lu", type); |
b0c632db | 1469 | |
e08b9637 CO |
1470 | if (type & KVM_VM_S390_UCONTROL) { |
1471 | kvm->arch.gmap = NULL; | |
a3a92c31 | 1472 | kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT; |
e08b9637 | 1473 | } else { |
32e6b236 GH |
1474 | if (sclp.hamax == U64_MAX) |
1475 | kvm->arch.mem_limit = TASK_MAX_SIZE; | |
1476 | else | |
1477 | kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE, | |
1478 | sclp.hamax + 1); | |
6ea427bb | 1479 | kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1); |
e08b9637 | 1480 | if (!kvm->arch.gmap) |
40f5b735 | 1481 | goto out_err; |
2c70fe44 | 1482 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1483 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1484 | } |
fa6b7fe9 CH |
1485 | |
1486 | kvm->arch.css_support = 0; | |
84223598 | 1487 | kvm->arch.use_irqchip = 0; |
72f25020 | 1488 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1489 | |
8ad35755 | 1490 | spin_lock_init(&kvm->arch.start_stop_lock); |
a3508fbe | 1491 | kvm_s390_vsie_init(kvm); |
8335713a | 1492 | KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid); |
8ad35755 | 1493 | |
d89f5eff | 1494 | return 0; |
40f5b735 | 1495 | out_err: |
c54f0d6a | 1496 | free_page((unsigned long)kvm->arch.sie_page2); |
598841ca | 1497 | debug_unregister(kvm->arch.dbf); |
7d43bafc | 1498 | sca_dispose(kvm); |
78f26131 | 1499 | KVM_EVENT(3, "creation of vm failed: %d", rc); |
d89f5eff | 1500 | return rc; |
b0c632db HC |
1501 | } |
1502 | ||
235539b4 LC |
1503 | bool kvm_arch_has_vcpu_debugfs(void) |
1504 | { | |
1505 | return false; | |
1506 | } | |
1507 | ||
1508 | int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) | |
1509 | { | |
1510 | return 0; | |
1511 | } | |
1512 | ||
d329c035 CB |
1513 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1514 | { | |
1515 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1516 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1517 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1518 | kvm_clear_async_pf_completion_queue(vcpu); |
bc784cce | 1519 | if (!kvm_is_ucontrol(vcpu->kvm)) |
a6e2f683 | 1520 | sca_del_vcpu(vcpu); |
27e0393f CO |
1521 | |
1522 | if (kvm_is_ucontrol(vcpu->kvm)) | |
6ea427bb | 1523 | gmap_remove(vcpu->arch.gmap); |
27e0393f | 1524 | |
e6db1d61 | 1525 | if (vcpu->kvm->arch.use_cmma) |
b31605c1 | 1526 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
d329c035 | 1527 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1528 | |
6692cef3 | 1529 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1530 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1531 | } |
1532 | ||
1533 | static void kvm_free_vcpus(struct kvm *kvm) | |
1534 | { | |
1535 | unsigned int i; | |
988a2cae | 1536 | struct kvm_vcpu *vcpu; |
d329c035 | 1537 | |
988a2cae GN |
1538 | kvm_for_each_vcpu(i, vcpu, kvm) |
1539 | kvm_arch_vcpu_destroy(vcpu); | |
1540 | ||
1541 | mutex_lock(&kvm->lock); | |
1542 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1543 | kvm->vcpus[i] = NULL; | |
1544 | ||
1545 | atomic_set(&kvm->online_vcpus, 0); | |
1546 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1547 | } |
1548 | ||
b0c632db HC |
1549 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1550 | { | |
d329c035 | 1551 | kvm_free_vcpus(kvm); |
7d43bafc | 1552 | sca_dispose(kvm); |
d329c035 | 1553 | debug_unregister(kvm->arch.dbf); |
c54f0d6a | 1554 | free_page((unsigned long)kvm->arch.sie_page2); |
27e0393f | 1555 | if (!kvm_is_ucontrol(kvm)) |
6ea427bb | 1556 | gmap_remove(kvm->arch.gmap); |
841b91c5 | 1557 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1558 | kvm_s390_clear_float_irqs(kvm); |
a3508fbe | 1559 | kvm_s390_vsie_destroy(kvm); |
8335713a | 1560 | KVM_EVENT(3, "vm 0x%pK destroyed", kvm); |
b0c632db HC |
1561 | } |
1562 | ||
1563 | /* Section: vcpu related */ | |
dafd032a DD |
1564 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1565 | { | |
6ea427bb | 1566 | vcpu->arch.gmap = gmap_create(current->mm, -1UL); |
dafd032a DD |
1567 | if (!vcpu->arch.gmap) |
1568 | return -ENOMEM; | |
1569 | vcpu->arch.gmap->private = vcpu->kvm; | |
1570 | ||
1571 | return 0; | |
1572 | } | |
1573 | ||
a6e2f683 ED |
1574 | static void sca_del_vcpu(struct kvm_vcpu *vcpu) |
1575 | { | |
a6940674 DH |
1576 | if (!kvm_s390_use_sca_entries()) |
1577 | return; | |
5e044315 | 1578 | read_lock(&vcpu->kvm->arch.sca_lock); |
7d43bafc ED |
1579 | if (vcpu->kvm->arch.use_esca) { |
1580 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
a6e2f683 | 1581 | |
7d43bafc | 1582 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
10ce32d5 | 1583 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc ED |
1584 | } else { |
1585 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
1586 | ||
1587 | clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); | |
10ce32d5 | 1588 | sca->cpu[vcpu->vcpu_id].sda = 0; |
7d43bafc | 1589 | } |
5e044315 | 1590 | read_unlock(&vcpu->kvm->arch.sca_lock); |
a6e2f683 ED |
1591 | } |
1592 | ||
eaa78f34 | 1593 | static void sca_add_vcpu(struct kvm_vcpu *vcpu) |
a6e2f683 | 1594 | { |
a6940674 DH |
1595 | if (!kvm_s390_use_sca_entries()) { |
1596 | struct bsca_block *sca = vcpu->kvm->arch.sca; | |
1597 | ||
1598 | /* we still need the basic sca for the ipte control */ | |
1599 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); | |
1600 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
1601 | } | |
eaa78f34 DH |
1602 | read_lock(&vcpu->kvm->arch.sca_lock); |
1603 | if (vcpu->kvm->arch.use_esca) { | |
1604 | struct esca_block *sca = vcpu->kvm->arch.sca; | |
7d43bafc | 1605 | |
eaa78f34 | 1606 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1607 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1608 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU; | |
25508824 | 1609 | vcpu->arch.sie_block->ecb2 |= 0x04U; |
eaa78f34 | 1610 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
7d43bafc | 1611 | } else { |
eaa78f34 | 1612 | struct bsca_block *sca = vcpu->kvm->arch.sca; |
a6e2f683 | 1613 | |
eaa78f34 | 1614 | sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
7d43bafc ED |
1615 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
1616 | vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; | |
eaa78f34 | 1617 | set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); |
7d43bafc | 1618 | } |
eaa78f34 | 1619 | read_unlock(&vcpu->kvm->arch.sca_lock); |
5e044315 ED |
1620 | } |
1621 | ||
1622 | /* Basic SCA to Extended SCA data copy routines */ | |
1623 | static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s) | |
1624 | { | |
1625 | d->sda = s->sda; | |
1626 | d->sigp_ctrl.c = s->sigp_ctrl.c; | |
1627 | d->sigp_ctrl.scn = s->sigp_ctrl.scn; | |
1628 | } | |
1629 | ||
1630 | static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s) | |
1631 | { | |
1632 | int i; | |
1633 | ||
1634 | d->ipte_control = s->ipte_control; | |
1635 | d->mcn[0] = s->mcn; | |
1636 | for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++) | |
1637 | sca_copy_entry(&d->cpu[i], &s->cpu[i]); | |
1638 | } | |
1639 | ||
1640 | static int sca_switch_to_extended(struct kvm *kvm) | |
1641 | { | |
1642 | struct bsca_block *old_sca = kvm->arch.sca; | |
1643 | struct esca_block *new_sca; | |
1644 | struct kvm_vcpu *vcpu; | |
1645 | unsigned int vcpu_idx; | |
1646 | u32 scaol, scaoh; | |
1647 | ||
1648 | new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO); | |
1649 | if (!new_sca) | |
1650 | return -ENOMEM; | |
1651 | ||
1652 | scaoh = (u32)((u64)(new_sca) >> 32); | |
1653 | scaol = (u32)(u64)(new_sca) & ~0x3fU; | |
1654 | ||
1655 | kvm_s390_vcpu_block_all(kvm); | |
1656 | write_lock(&kvm->arch.sca_lock); | |
1657 | ||
1658 | sca_copy_b_to_e(new_sca, old_sca); | |
1659 | ||
1660 | kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) { | |
1661 | vcpu->arch.sie_block->scaoh = scaoh; | |
1662 | vcpu->arch.sie_block->scaol = scaol; | |
1663 | vcpu->arch.sie_block->ecb2 |= 0x04U; | |
1664 | } | |
1665 | kvm->arch.sca = new_sca; | |
1666 | kvm->arch.use_esca = 1; | |
1667 | ||
1668 | write_unlock(&kvm->arch.sca_lock); | |
1669 | kvm_s390_vcpu_unblock_all(kvm); | |
1670 | ||
1671 | free_page((unsigned long)old_sca); | |
1672 | ||
8335713a CB |
1673 | VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)", |
1674 | old_sca, kvm->arch.sca); | |
5e044315 | 1675 | return 0; |
a6e2f683 ED |
1676 | } |
1677 | ||
1678 | static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id) | |
1679 | { | |
5e044315 ED |
1680 | int rc; |
1681 | ||
a6940674 DH |
1682 | if (!kvm_s390_use_sca_entries()) { |
1683 | if (id < KVM_MAX_VCPUS) | |
1684 | return true; | |
1685 | return false; | |
1686 | } | |
5e044315 ED |
1687 | if (id < KVM_S390_BSCA_CPU_SLOTS) |
1688 | return true; | |
76a6dd72 | 1689 | if (!sclp.has_esca || !sclp.has_64bscao) |
5e044315 ED |
1690 | return false; |
1691 | ||
1692 | mutex_lock(&kvm->lock); | |
1693 | rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm); | |
1694 | mutex_unlock(&kvm->lock); | |
1695 | ||
1696 | return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS; | |
a6e2f683 ED |
1697 | } |
1698 | ||
b0c632db HC |
1699 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1700 | { | |
3c038e6b DD |
1701 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1702 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1703 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1704 | KVM_SYNC_GPRS | | |
9eed0735 | 1705 | KVM_SYNC_ACRS | |
b028ee3e DH |
1706 | KVM_SYNC_CRS | |
1707 | KVM_SYNC_ARCH0 | | |
1708 | KVM_SYNC_PFAULT; | |
75a4615c | 1709 | kvm_s390_set_prefix(vcpu, 0); |
c6e5f166 FZ |
1710 | if (test_kvm_facility(vcpu->kvm, 64)) |
1711 | vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB; | |
f6aa6dc4 DH |
1712 | /* fprs can be synchronized via vrs, even if the guest has no vx. With |
1713 | * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. | |
1714 | */ | |
1715 | if (MACHINE_HAS_VX) | |
68c55750 | 1716 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; |
6fd8e67d DH |
1717 | else |
1718 | vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS; | |
dafd032a DD |
1719 | |
1720 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1721 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1722 | ||
b0c632db HC |
1723 | return 0; |
1724 | } | |
1725 | ||
db0758b2 DH |
1726 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
1727 | static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1728 | { | |
1729 | WARN_ON_ONCE(vcpu->arch.cputm_start != 0); | |
9c23a131 | 1730 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1731 | vcpu->arch.cputm_start = get_tod_clock_fast(); |
9c23a131 | 1732 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1733 | } |
1734 | ||
1735 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1736 | static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1737 | { | |
1738 | WARN_ON_ONCE(vcpu->arch.cputm_start == 0); | |
9c23a131 | 1739 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1740 | vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start; |
1741 | vcpu->arch.cputm_start = 0; | |
9c23a131 | 1742 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1743 | } |
1744 | ||
1745 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1746 | static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1747 | { | |
1748 | WARN_ON_ONCE(vcpu->arch.cputm_enabled); | |
1749 | vcpu->arch.cputm_enabled = true; | |
1750 | __start_cpu_timer_accounting(vcpu); | |
1751 | } | |
1752 | ||
1753 | /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ | |
1754 | static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1755 | { | |
1756 | WARN_ON_ONCE(!vcpu->arch.cputm_enabled); | |
1757 | __stop_cpu_timer_accounting(vcpu); | |
1758 | vcpu->arch.cputm_enabled = false; | |
1759 | } | |
1760 | ||
1761 | static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1762 | { | |
1763 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1764 | __enable_cpu_timer_accounting(vcpu); | |
1765 | preempt_enable(); | |
1766 | } | |
1767 | ||
1768 | static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) | |
1769 | { | |
1770 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ | |
1771 | __disable_cpu_timer_accounting(vcpu); | |
1772 | preempt_enable(); | |
1773 | } | |
1774 | ||
4287f247 DH |
1775 | /* set the cpu timer - may only be called from the VCPU thread itself */ |
1776 | void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm) | |
1777 | { | |
db0758b2 | 1778 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
9c23a131 | 1779 | raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
db0758b2 DH |
1780 | if (vcpu->arch.cputm_enabled) |
1781 | vcpu->arch.cputm_start = get_tod_clock_fast(); | |
4287f247 | 1782 | vcpu->arch.sie_block->cputm = cputm; |
9c23a131 | 1783 | raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
db0758b2 | 1784 | preempt_enable(); |
4287f247 DH |
1785 | } |
1786 | ||
db0758b2 | 1787 | /* update and get the cpu timer - can also be called from other VCPU threads */ |
4287f247 DH |
1788 | __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) |
1789 | { | |
9c23a131 | 1790 | unsigned int seq; |
db0758b2 | 1791 | __u64 value; |
db0758b2 DH |
1792 | |
1793 | if (unlikely(!vcpu->arch.cputm_enabled)) | |
1794 | return vcpu->arch.sie_block->cputm; | |
1795 | ||
9c23a131 DH |
1796 | preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
1797 | do { | |
1798 | seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount); | |
1799 | /* | |
1800 | * If the writer would ever execute a read in the critical | |
1801 | * section, e.g. in irq context, we have a deadlock. | |
1802 | */ | |
1803 | WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu); | |
1804 | value = vcpu->arch.sie_block->cputm; | |
1805 | /* if cputm_start is 0, accounting is being started/stopped */ | |
1806 | if (likely(vcpu->arch.cputm_start)) | |
1807 | value -= get_tod_clock_fast() - vcpu->arch.cputm_start; | |
1808 | } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1)); | |
1809 | preempt_enable(); | |
db0758b2 | 1810 | return value; |
4287f247 DH |
1811 | } |
1812 | ||
b0c632db HC |
1813 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1814 | { | |
9977e886 | 1815 | |
37d9df98 | 1816 | gmap_enable(vcpu->arch.enabled_gmap); |
805de8f4 | 1817 | atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
5ebda316 | 1818 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1819 | __start_cpu_timer_accounting(vcpu); |
01a745ac | 1820 | vcpu->cpu = cpu; |
b0c632db HC |
1821 | } |
1822 | ||
1823 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1824 | { | |
01a745ac | 1825 | vcpu->cpu = -1; |
5ebda316 | 1826 | if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
db0758b2 | 1827 | __stop_cpu_timer_accounting(vcpu); |
805de8f4 | 1828 | atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
37d9df98 DH |
1829 | vcpu->arch.enabled_gmap = gmap_get_enabled(); |
1830 | gmap_disable(vcpu->arch.enabled_gmap); | |
9977e886 | 1831 | |
b0c632db HC |
1832 | } |
1833 | ||
1834 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1835 | { | |
1836 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1837 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1838 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1839 | kvm_s390_set_prefix(vcpu, 0); |
4287f247 | 1840 | kvm_s390_set_cpu_timer(vcpu, 0); |
b0c632db HC |
1841 | vcpu->arch.sie_block->ckc = 0UL; |
1842 | vcpu->arch.sie_block->todpr = 0; | |
1843 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1844 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1845 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
9abc2a08 DH |
1846 | /* make sure the new fpc will be lazily loaded */ |
1847 | save_fpu_regs(); | |
1848 | current->thread.fpu.fpc = 0; | |
b0c632db | 1849 | vcpu->arch.sie_block->gbea = 1; |
672550fb | 1850 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1851 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1852 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1853 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1854 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1855 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1856 | } |
1857 | ||
31928aa5 | 1858 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1859 | { |
72f25020 | 1860 | mutex_lock(&vcpu->kvm->lock); |
fdf03650 | 1861 | preempt_disable(); |
72f25020 | 1862 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
fdf03650 | 1863 | preempt_enable(); |
72f25020 | 1864 | mutex_unlock(&vcpu->kvm->lock); |
25508824 | 1865 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
dafd032a | 1866 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
eaa78f34 | 1867 | sca_add_vcpu(vcpu); |
25508824 | 1868 | } |
6502a34c DH |
1869 | if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0) |
1870 | vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; | |
37d9df98 DH |
1871 | /* make vcpu_load load the right gmap on the first trigger */ |
1872 | vcpu->arch.enabled_gmap = vcpu->arch.gmap; | |
42897d86 MT |
1873 | } |
1874 | ||
5102ee87 TK |
1875 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1876 | { | |
9d8d5786 | 1877 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1878 | return; |
1879 | ||
a374e892 TK |
1880 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1881 | ||
1882 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1883 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1884 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1885 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1886 | ||
5102ee87 TK |
1887 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1888 | } | |
1889 | ||
b31605c1 DD |
1890 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1891 | { | |
1892 | free_page(vcpu->arch.sie_block->cbrlo); | |
1893 | vcpu->arch.sie_block->cbrlo = 0; | |
1894 | } | |
1895 | ||
1896 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1897 | { | |
1898 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1899 | if (!vcpu->arch.sie_block->cbrlo) | |
1900 | return -ENOMEM; | |
1901 | ||
1902 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1903 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1904 | return 0; | |
1905 | } | |
1906 | ||
91520f1a MM |
1907 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1908 | { | |
1909 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1910 | ||
91520f1a | 1911 | vcpu->arch.sie_block->ibc = model->ibc; |
80bc79dc | 1912 | if (test_kvm_facility(vcpu->kvm, 7)) |
c54f0d6a | 1913 | vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list; |
91520f1a MM |
1914 | } |
1915 | ||
b0c632db HC |
1916 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1917 | { | |
b31605c1 | 1918 | int rc = 0; |
b31288fa | 1919 | |
9e6dabef CH |
1920 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1921 | CPUSTAT_SM | | |
a4a4f191 GH |
1922 | CPUSTAT_STOPPED); |
1923 | ||
53df84f8 | 1924 | if (test_kvm_facility(vcpu->kvm, 78)) |
805de8f4 | 1925 | atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); |
53df84f8 | 1926 | else if (test_kvm_facility(vcpu->kvm, 8)) |
805de8f4 | 1927 | atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
a4a4f191 | 1928 | |
91520f1a MM |
1929 | kvm_s390_vcpu_setup_model(vcpu); |
1930 | ||
bdab09f3 DH |
1931 | /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */ |
1932 | if (MACHINE_HAS_ESOP) | |
1933 | vcpu->arch.sie_block->ecb |= 0x02; | |
bd50e8ec DH |
1934 | if (test_kvm_facility(vcpu->kvm, 9)) |
1935 | vcpu->arch.sie_block->ecb |= 0x04; | |
f597d24e | 1936 | if (test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1937 | vcpu->arch.sie_block->ecb |= 0x10; |
1938 | ||
873b425e | 1939 | if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi) |
d6af0b49 | 1940 | vcpu->arch.sie_block->ecb2 |= 0x08; |
48ee7d3a DH |
1941 | vcpu->arch.sie_block->eca = 0x1002000U; |
1942 | if (sclp.has_cei) | |
1943 | vcpu->arch.sie_block->eca |= 0x80000000U; | |
11ad65b7 DH |
1944 | if (sclp.has_ib) |
1945 | vcpu->arch.sie_block->eca |= 0x40000000U; | |
37c5f6c8 | 1946 | if (sclp.has_siif) |
217a4406 | 1947 | vcpu->arch.sie_block->eca |= 1; |
37c5f6c8 | 1948 | if (sclp.has_sigpif) |
ea5f4969 | 1949 | vcpu->arch.sie_block->eca |= 0x10000000U; |
18280d8b | 1950 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1951 | vcpu->arch.sie_block->eca |= 0x00020000; |
1952 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1953 | } | |
c6e5f166 | 1954 | vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb; |
492d8642 | 1955 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1956 | |
e6db1d61 | 1957 | if (vcpu->kvm->arch.use_cmma) { |
b31605c1 DD |
1958 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
1959 | if (rc) | |
1960 | return rc; | |
b31288fa | 1961 | } |
0ac96caf | 1962 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1963 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1964 | |
5102ee87 TK |
1965 | kvm_s390_vcpu_crypto_setup(vcpu); |
1966 | ||
b31605c1 | 1967 | return rc; |
b0c632db HC |
1968 | } |
1969 | ||
1970 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1971 | unsigned int id) | |
1972 | { | |
4d47555a | 1973 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1974 | struct sie_page *sie_page; |
4d47555a CO |
1975 | int rc = -EINVAL; |
1976 | ||
4215825e | 1977 | if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id)) |
4d47555a CO |
1978 | goto out; |
1979 | ||
1980 | rc = -ENOMEM; | |
b0c632db | 1981 | |
b110feaf | 1982 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1983 | if (!vcpu) |
4d47555a | 1984 | goto out; |
b0c632db | 1985 | |
7feb6bb8 MM |
1986 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1987 | if (!sie_page) | |
b0c632db HC |
1988 | goto out_free_cpu; |
1989 | ||
7feb6bb8 MM |
1990 | vcpu->arch.sie_block = &sie_page->sie_block; |
1991 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
1992 | ||
efed1104 DH |
1993 | /* the real guest size will always be smaller than msl */ |
1994 | vcpu->arch.sie_block->mso = 0; | |
1995 | vcpu->arch.sie_block->msl = sclp.hamax; | |
1996 | ||
b0c632db | 1997 | vcpu->arch.sie_block->icpua = id; |
ba5c1e9b | 1998 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1999 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 2000 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 2001 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
9c23a131 | 2002 | seqcount_init(&vcpu->arch.cputm_seqcount); |
ba5c1e9b | 2003 | |
b0c632db HC |
2004 | rc = kvm_vcpu_init(vcpu, kvm, id); |
2005 | if (rc) | |
9abc2a08 | 2006 | goto out_free_sie_block; |
8335713a | 2007 | VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu, |
b0c632db | 2008 | vcpu->arch.sie_block); |
ade38c31 | 2009 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 2010 | |
b0c632db | 2011 | return vcpu; |
7b06bf2f WY |
2012 | out_free_sie_block: |
2013 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 2014 | out_free_cpu: |
b110feaf | 2015 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 2016 | out: |
b0c632db HC |
2017 | return ERR_PTR(rc); |
2018 | } | |
2019 | ||
b0c632db HC |
2020 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
2021 | { | |
9a022067 | 2022 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
2023 | } |
2024 | ||
27406cd5 | 2025 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e | 2026 | { |
805de8f4 | 2027 | atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
61a6df54 | 2028 | exit_sie(vcpu); |
49b99e1e CB |
2029 | } |
2030 | ||
27406cd5 | 2031 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e | 2032 | { |
805de8f4 | 2033 | atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
49b99e1e CB |
2034 | } |
2035 | ||
8e236546 CB |
2036 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
2037 | { | |
805de8f4 | 2038 | atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
61a6df54 | 2039 | exit_sie(vcpu); |
8e236546 CB |
2040 | } |
2041 | ||
2042 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
2043 | { | |
9bf9fde2 | 2044 | atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
8e236546 CB |
2045 | } |
2046 | ||
49b99e1e CB |
2047 | /* |
2048 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
2049 | * If the CPU is not running (e.g. waiting as idle) the function will | |
2050 | * return immediately. */ | |
2051 | void exit_sie(struct kvm_vcpu *vcpu) | |
2052 | { | |
805de8f4 | 2053 | atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
49b99e1e CB |
2054 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
2055 | cpu_relax(); | |
2056 | } | |
2057 | ||
8e236546 CB |
2058 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
2059 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 2060 | { |
8e236546 CB |
2061 | kvm_make_request(req, vcpu); |
2062 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
2063 | } |
2064 | ||
414d3b07 MS |
2065 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
2066 | unsigned long end) | |
2c70fe44 | 2067 | { |
2c70fe44 CB |
2068 | struct kvm *kvm = gmap->private; |
2069 | struct kvm_vcpu *vcpu; | |
414d3b07 MS |
2070 | unsigned long prefix; |
2071 | int i; | |
2c70fe44 | 2072 | |
65d0b0d4 DH |
2073 | if (gmap_is_shadow(gmap)) |
2074 | return; | |
414d3b07 MS |
2075 | if (start >= 1UL << 31) |
2076 | /* We are only interested in prefix pages */ | |
2077 | return; | |
2c70fe44 CB |
2078 | kvm_for_each_vcpu(i, vcpu, kvm) { |
2079 | /* match against both prefix pages */ | |
414d3b07 MS |
2080 | prefix = kvm_s390_get_prefix(vcpu); |
2081 | if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) { | |
2082 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx", | |
2083 | start, end); | |
8e236546 | 2084 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
2085 | } |
2086 | } | |
2087 | } | |
2088 | ||
b6d33834 CD |
2089 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
2090 | { | |
2091 | /* kvm common code refers to this, but never calls it */ | |
2092 | BUG(); | |
2093 | return 0; | |
2094 | } | |
2095 | ||
14eebd91 CO |
2096 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
2097 | struct kvm_one_reg *reg) | |
2098 | { | |
2099 | int r = -EINVAL; | |
2100 | ||
2101 | switch (reg->id) { | |
29b7c71b CO |
2102 | case KVM_REG_S390_TODPR: |
2103 | r = put_user(vcpu->arch.sie_block->todpr, | |
2104 | (u32 __user *)reg->addr); | |
2105 | break; | |
2106 | case KVM_REG_S390_EPOCHDIFF: | |
2107 | r = put_user(vcpu->arch.sie_block->epoch, | |
2108 | (u64 __user *)reg->addr); | |
2109 | break; | |
46a6dd1c | 2110 | case KVM_REG_S390_CPU_TIMER: |
4287f247 | 2111 | r = put_user(kvm_s390_get_cpu_timer(vcpu), |
46a6dd1c J |
2112 | (u64 __user *)reg->addr); |
2113 | break; | |
2114 | case KVM_REG_S390_CLOCK_COMP: | |
2115 | r = put_user(vcpu->arch.sie_block->ckc, | |
2116 | (u64 __user *)reg->addr); | |
2117 | break; | |
536336c2 DD |
2118 | case KVM_REG_S390_PFTOKEN: |
2119 | r = put_user(vcpu->arch.pfault_token, | |
2120 | (u64 __user *)reg->addr); | |
2121 | break; | |
2122 | case KVM_REG_S390_PFCOMPARE: | |
2123 | r = put_user(vcpu->arch.pfault_compare, | |
2124 | (u64 __user *)reg->addr); | |
2125 | break; | |
2126 | case KVM_REG_S390_PFSELECT: | |
2127 | r = put_user(vcpu->arch.pfault_select, | |
2128 | (u64 __user *)reg->addr); | |
2129 | break; | |
672550fb CB |
2130 | case KVM_REG_S390_PP: |
2131 | r = put_user(vcpu->arch.sie_block->pp, | |
2132 | (u64 __user *)reg->addr); | |
2133 | break; | |
afa45ff5 CB |
2134 | case KVM_REG_S390_GBEA: |
2135 | r = put_user(vcpu->arch.sie_block->gbea, | |
2136 | (u64 __user *)reg->addr); | |
2137 | break; | |
14eebd91 CO |
2138 | default: |
2139 | break; | |
2140 | } | |
2141 | ||
2142 | return r; | |
2143 | } | |
2144 | ||
2145 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
2146 | struct kvm_one_reg *reg) | |
2147 | { | |
2148 | int r = -EINVAL; | |
4287f247 | 2149 | __u64 val; |
14eebd91 CO |
2150 | |
2151 | switch (reg->id) { | |
29b7c71b CO |
2152 | case KVM_REG_S390_TODPR: |
2153 | r = get_user(vcpu->arch.sie_block->todpr, | |
2154 | (u32 __user *)reg->addr); | |
2155 | break; | |
2156 | case KVM_REG_S390_EPOCHDIFF: | |
2157 | r = get_user(vcpu->arch.sie_block->epoch, | |
2158 | (u64 __user *)reg->addr); | |
2159 | break; | |
46a6dd1c | 2160 | case KVM_REG_S390_CPU_TIMER: |
4287f247 DH |
2161 | r = get_user(val, (u64 __user *)reg->addr); |
2162 | if (!r) | |
2163 | kvm_s390_set_cpu_timer(vcpu, val); | |
46a6dd1c J |
2164 | break; |
2165 | case KVM_REG_S390_CLOCK_COMP: | |
2166 | r = get_user(vcpu->arch.sie_block->ckc, | |
2167 | (u64 __user *)reg->addr); | |
2168 | break; | |
536336c2 DD |
2169 | case KVM_REG_S390_PFTOKEN: |
2170 | r = get_user(vcpu->arch.pfault_token, | |
2171 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
2172 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2173 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
2174 | break; |
2175 | case KVM_REG_S390_PFCOMPARE: | |
2176 | r = get_user(vcpu->arch.pfault_compare, | |
2177 | (u64 __user *)reg->addr); | |
2178 | break; | |
2179 | case KVM_REG_S390_PFSELECT: | |
2180 | r = get_user(vcpu->arch.pfault_select, | |
2181 | (u64 __user *)reg->addr); | |
2182 | break; | |
672550fb CB |
2183 | case KVM_REG_S390_PP: |
2184 | r = get_user(vcpu->arch.sie_block->pp, | |
2185 | (u64 __user *)reg->addr); | |
2186 | break; | |
afa45ff5 CB |
2187 | case KVM_REG_S390_GBEA: |
2188 | r = get_user(vcpu->arch.sie_block->gbea, | |
2189 | (u64 __user *)reg->addr); | |
2190 | break; | |
14eebd91 CO |
2191 | default: |
2192 | break; | |
2193 | } | |
2194 | ||
2195 | return r; | |
2196 | } | |
b6d33834 | 2197 | |
b0c632db HC |
2198 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
2199 | { | |
b0c632db | 2200 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
2201 | return 0; |
2202 | } | |
2203 | ||
2204 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2205 | { | |
5a32c1af | 2206 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
2207 | return 0; |
2208 | } | |
2209 | ||
2210 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
2211 | { | |
5a32c1af | 2212 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
2213 | return 0; |
2214 | } | |
2215 | ||
2216 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
2217 | struct kvm_sregs *sregs) | |
2218 | { | |
59674c1a | 2219 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 2220 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
b0c632db HC |
2221 | return 0; |
2222 | } | |
2223 | ||
2224 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
2225 | struct kvm_sregs *sregs) | |
2226 | { | |
59674c1a | 2227 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 2228 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
2229 | return 0; |
2230 | } | |
2231 | ||
2232 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2233 | { | |
4725c860 MS |
2234 | if (test_fp_ctl(fpu->fpc)) |
2235 | return -EINVAL; | |
e1788bb9 | 2236 | vcpu->run->s.regs.fpc = fpu->fpc; |
9abc2a08 | 2237 | if (MACHINE_HAS_VX) |
a7d4b8f2 DH |
2238 | convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs, |
2239 | (freg_t *) fpu->fprs); | |
9abc2a08 | 2240 | else |
a7d4b8f2 | 2241 | memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
b0c632db HC |
2242 | return 0; |
2243 | } | |
2244 | ||
2245 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2246 | { | |
9abc2a08 DH |
2247 | /* make sure we have the latest values */ |
2248 | save_fpu_regs(); | |
2249 | if (MACHINE_HAS_VX) | |
a7d4b8f2 DH |
2250 | convert_vx_to_fp((freg_t *) fpu->fprs, |
2251 | (__vector128 *) vcpu->run->s.regs.vrs); | |
9abc2a08 | 2252 | else |
a7d4b8f2 | 2253 | memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs)); |
e1788bb9 | 2254 | fpu->fpc = vcpu->run->s.regs.fpc; |
b0c632db HC |
2255 | return 0; |
2256 | } | |
2257 | ||
2258 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
2259 | { | |
2260 | int rc = 0; | |
2261 | ||
7a42fdc2 | 2262 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 2263 | rc = -EBUSY; |
d7b0b5eb CO |
2264 | else { |
2265 | vcpu->run->psw_mask = psw.mask; | |
2266 | vcpu->run->psw_addr = psw.addr; | |
2267 | } | |
b0c632db HC |
2268 | return rc; |
2269 | } | |
2270 | ||
2271 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
2272 | struct kvm_translation *tr) | |
2273 | { | |
2274 | return -EINVAL; /* not implemented yet */ | |
2275 | } | |
2276 | ||
27291e21 DH |
2277 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
2278 | KVM_GUESTDBG_USE_HW_BP | \ | |
2279 | KVM_GUESTDBG_ENABLE) | |
2280 | ||
d0bfb940 JK |
2281 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
2282 | struct kvm_guest_debug *dbg) | |
b0c632db | 2283 | { |
27291e21 DH |
2284 | int rc = 0; |
2285 | ||
2286 | vcpu->guest_debug = 0; | |
2287 | kvm_s390_clear_bp_data(vcpu); | |
2288 | ||
2de3bfc2 | 2289 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 | 2290 | return -EINVAL; |
89b5b4de DH |
2291 | if (!sclp.has_gpere) |
2292 | return -EINVAL; | |
27291e21 DH |
2293 | |
2294 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
2295 | vcpu->guest_debug = dbg->control; | |
2296 | /* enforce guest PER */ | |
805de8f4 | 2297 | atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2298 | |
2299 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
2300 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
2301 | } else { | |
805de8f4 | 2302 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2303 | vcpu->arch.guestdbg.last_bp = 0; |
2304 | } | |
2305 | ||
2306 | if (rc) { | |
2307 | vcpu->guest_debug = 0; | |
2308 | kvm_s390_clear_bp_data(vcpu); | |
805de8f4 | 2309 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
2310 | } |
2311 | ||
2312 | return rc; | |
b0c632db HC |
2313 | } |
2314 | ||
62d9f0db MT |
2315 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
2316 | struct kvm_mp_state *mp_state) | |
2317 | { | |
6352e4d2 DH |
2318 | /* CHECK_STOP and LOAD are not supported yet */ |
2319 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
2320 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
2321 | } |
2322 | ||
2323 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
2324 | struct kvm_mp_state *mp_state) | |
2325 | { | |
6352e4d2 DH |
2326 | int rc = 0; |
2327 | ||
2328 | /* user space knows about this interface - let it control the state */ | |
2329 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
2330 | ||
2331 | switch (mp_state->mp_state) { | |
2332 | case KVM_MP_STATE_STOPPED: | |
2333 | kvm_s390_vcpu_stop(vcpu); | |
2334 | break; | |
2335 | case KVM_MP_STATE_OPERATING: | |
2336 | kvm_s390_vcpu_start(vcpu); | |
2337 | break; | |
2338 | case KVM_MP_STATE_LOAD: | |
2339 | case KVM_MP_STATE_CHECK_STOP: | |
2340 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
2341 | default: | |
2342 | rc = -ENXIO; | |
2343 | } | |
2344 | ||
2345 | return rc; | |
62d9f0db MT |
2346 | } |
2347 | ||
8ad35755 DH |
2348 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
2349 | { | |
2350 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
2351 | } | |
2352 | ||
2c70fe44 CB |
2353 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
2354 | { | |
8ad35755 | 2355 | retry: |
8e236546 | 2356 | kvm_s390_vcpu_request_handled(vcpu); |
586b7ccd CB |
2357 | if (!vcpu->requests) |
2358 | return 0; | |
2c70fe44 CB |
2359 | /* |
2360 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
b2d73b2a | 2361 | * guest prefix page. gmap_mprotect_notify will wait on the ptl lock. |
2c70fe44 CB |
2362 | * This ensures that the ipte instruction for this request has |
2363 | * already finished. We might race against a second unmapper that | |
2364 | * wants to set the blocking bit. Lets just retry the request loop. | |
2365 | */ | |
8ad35755 | 2366 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 | 2367 | int rc; |
b2d73b2a MS |
2368 | rc = gmap_mprotect_notify(vcpu->arch.gmap, |
2369 | kvm_s390_get_prefix(vcpu), | |
2370 | PAGE_SIZE * 2, PROT_WRITE); | |
aca411a4 JN |
2371 | if (rc) { |
2372 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
2c70fe44 | 2373 | return rc; |
aca411a4 | 2374 | } |
8ad35755 | 2375 | goto retry; |
2c70fe44 | 2376 | } |
8ad35755 | 2377 | |
d3d692c8 DH |
2378 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
2379 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
2380 | goto retry; | |
2381 | } | |
2382 | ||
8ad35755 DH |
2383 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
2384 | if (!ibs_enabled(vcpu)) { | |
2385 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
805de8f4 | 2386 | atomic_or(CPUSTAT_IBS, |
8ad35755 DH |
2387 | &vcpu->arch.sie_block->cpuflags); |
2388 | } | |
2389 | goto retry; | |
2c70fe44 | 2390 | } |
8ad35755 DH |
2391 | |
2392 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
2393 | if (ibs_enabled(vcpu)) { | |
2394 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
805de8f4 | 2395 | atomic_andnot(CPUSTAT_IBS, |
8ad35755 DH |
2396 | &vcpu->arch.sie_block->cpuflags); |
2397 | } | |
2398 | goto retry; | |
2399 | } | |
2400 | ||
6502a34c DH |
2401 | if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) { |
2402 | vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; | |
2403 | goto retry; | |
2404 | } | |
2405 | ||
0759d068 DH |
2406 | /* nothing to do, just clear the request */ |
2407 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
2408 | ||
2c70fe44 CB |
2409 | return 0; |
2410 | } | |
2411 | ||
25ed1675 DH |
2412 | void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod) |
2413 | { | |
2414 | struct kvm_vcpu *vcpu; | |
2415 | int i; | |
2416 | ||
2417 | mutex_lock(&kvm->lock); | |
2418 | preempt_disable(); | |
2419 | kvm->arch.epoch = tod - get_tod_clock(); | |
2420 | kvm_s390_vcpu_block_all(kvm); | |
2421 | kvm_for_each_vcpu(i, vcpu, kvm) | |
2422 | vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
2423 | kvm_s390_vcpu_unblock_all(kvm); | |
2424 | preempt_enable(); | |
2425 | mutex_unlock(&kvm->lock); | |
2426 | } | |
2427 | ||
fa576c58 TH |
2428 | /** |
2429 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
2430 | * @vcpu: The corresponding virtual cpu | |
2431 | * @gpa: Guest physical address | |
2432 | * @writable: Whether the page should be writable or not | |
2433 | * | |
2434 | * Make sure that a guest page has been faulted-in on the host. | |
2435 | * | |
2436 | * Return: Zero on success, negative error code otherwise. | |
2437 | */ | |
2438 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 2439 | { |
527e30b4 MS |
2440 | return gmap_fault(vcpu->arch.gmap, gpa, |
2441 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
2442 | } |
2443 | ||
3c038e6b DD |
2444 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
2445 | unsigned long token) | |
2446 | { | |
2447 | struct kvm_s390_interrupt inti; | |
383d0b05 | 2448 | struct kvm_s390_irq irq; |
3c038e6b DD |
2449 | |
2450 | if (start_token) { | |
383d0b05 JF |
2451 | irq.u.ext.ext_params2 = token; |
2452 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
2453 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
2454 | } else { |
2455 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 2456 | inti.parm64 = token; |
3c038e6b DD |
2457 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
2458 | } | |
2459 | } | |
2460 | ||
2461 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
2462 | struct kvm_async_pf *work) | |
2463 | { | |
2464 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
2465 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
2466 | } | |
2467 | ||
2468 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
2469 | struct kvm_async_pf *work) | |
2470 | { | |
2471 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
2472 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
2473 | } | |
2474 | ||
2475 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
2476 | struct kvm_async_pf *work) | |
2477 | { | |
2478 | /* s390 will always inject the page directly */ | |
2479 | } | |
2480 | ||
2481 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
2482 | { | |
2483 | /* | |
2484 | * s390 will always inject the page directly, | |
2485 | * but we still want check_async_completion to cleanup | |
2486 | */ | |
2487 | return true; | |
2488 | } | |
2489 | ||
2490 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
2491 | { | |
2492 | hva_t hva; | |
2493 | struct kvm_arch_async_pf arch; | |
2494 | int rc; | |
2495 | ||
2496 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
2497 | return 0; | |
2498 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
2499 | vcpu->arch.pfault_compare) | |
2500 | return 0; | |
2501 | if (psw_extint_disabled(vcpu)) | |
2502 | return 0; | |
9a022067 | 2503 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
2504 | return 0; |
2505 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
2506 | return 0; | |
2507 | if (!vcpu->arch.gmap->pfault_enabled) | |
2508 | return 0; | |
2509 | ||
81480cc1 HC |
2510 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
2511 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
2512 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
2513 | return 0; |
2514 | ||
2515 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
2516 | return rc; | |
2517 | } | |
2518 | ||
3fb4c40f | 2519 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 2520 | { |
3fb4c40f | 2521 | int rc, cpuflags; |
e168bf8d | 2522 | |
3c038e6b DD |
2523 | /* |
2524 | * On s390 notifications for arriving pages will be delivered directly | |
2525 | * to the guest but the house keeping for completed pfaults is | |
2526 | * handled outside the worker. | |
2527 | */ | |
2528 | kvm_check_async_pf_completion(vcpu); | |
2529 | ||
7ec7c8c7 CB |
2530 | vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14]; |
2531 | vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15]; | |
b0c632db HC |
2532 | |
2533 | if (need_resched()) | |
2534 | schedule(); | |
2535 | ||
d3a73acb | 2536 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
2537 | s390_handle_mcck(); |
2538 | ||
79395031 JF |
2539 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
2540 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
2541 | if (rc) | |
2542 | return rc; | |
2543 | } | |
0ff31867 | 2544 | |
2c70fe44 CB |
2545 | rc = kvm_s390_handle_requests(vcpu); |
2546 | if (rc) | |
2547 | return rc; | |
2548 | ||
27291e21 DH |
2549 | if (guestdbg_enabled(vcpu)) { |
2550 | kvm_s390_backup_guest_per_regs(vcpu); | |
2551 | kvm_s390_patch_guest_per_regs(vcpu); | |
2552 | } | |
2553 | ||
b0c632db | 2554 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
2555 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
2556 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
2557 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 2558 | |
3fb4c40f TH |
2559 | return 0; |
2560 | } | |
2561 | ||
492d8642 TH |
2562 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
2563 | { | |
56317920 DH |
2564 | struct kvm_s390_pgm_info pgm_info = { |
2565 | .code = PGM_ADDRESSING, | |
2566 | }; | |
2567 | u8 opcode, ilen; | |
492d8642 TH |
2568 | int rc; |
2569 | ||
2570 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
2571 | trace_kvm_s390_sie_fault(vcpu); | |
2572 | ||
2573 | /* | |
2574 | * We want to inject an addressing exception, which is defined as a | |
2575 | * suppressing or terminating exception. However, since we came here | |
2576 | * by a DAT access exception, the PSW still points to the faulting | |
2577 | * instruction since DAT exceptions are nullifying. So we've got | |
2578 | * to look up the current opcode to get the length of the instruction | |
2579 | * to be able to forward the PSW. | |
2580 | */ | |
65977322 | 2581 | rc = read_guest_instr(vcpu, &opcode, 1); |
56317920 | 2582 | ilen = insn_length(opcode); |
9b0d721a DH |
2583 | if (rc < 0) { |
2584 | return rc; | |
2585 | } else if (rc) { | |
2586 | /* Instruction-Fetching Exceptions - we can't detect the ilen. | |
2587 | * Forward by arbitrary ilc, injection will take care of | |
2588 | * nullification if necessary. | |
2589 | */ | |
2590 | pgm_info = vcpu->arch.pgm; | |
2591 | ilen = 4; | |
2592 | } | |
56317920 DH |
2593 | pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID; |
2594 | kvm_s390_forward_psw(vcpu, ilen); | |
2595 | return kvm_s390_inject_prog_irq(vcpu, &pgm_info); | |
492d8642 TH |
2596 | } |
2597 | ||
3fb4c40f TH |
2598 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
2599 | { | |
2b29a9fd DD |
2600 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
2601 | vcpu->arch.sie_block->icptcode); | |
2602 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
2603 | ||
27291e21 DH |
2604 | if (guestdbg_enabled(vcpu)) |
2605 | kvm_s390_restore_guest_per_regs(vcpu); | |
2606 | ||
7ec7c8c7 CB |
2607 | vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14; |
2608 | vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15; | |
71f116bf DH |
2609 | |
2610 | if (vcpu->arch.sie_block->icptcode > 0) { | |
2611 | int rc = kvm_handle_sie_intercept(vcpu); | |
2612 | ||
2613 | if (rc != -EOPNOTSUPP) | |
2614 | return rc; | |
2615 | vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2616 | vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
2617 | vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
2618 | vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2619 | return -EREMOTE; | |
2620 | } else if (exit_reason != -EFAULT) { | |
2621 | vcpu->stat.exit_null++; | |
2622 | return 0; | |
210b1607 TH |
2623 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
2624 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
2625 | vcpu->run->s390_ucontrol.trans_exc_code = | |
2626 | current->thread.gmap_addr; | |
2627 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
71f116bf | 2628 | return -EREMOTE; |
24eb3a82 | 2629 | } else if (current->thread.gmap_pfault) { |
3c038e6b | 2630 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 2631 | current->thread.gmap_pfault = 0; |
71f116bf DH |
2632 | if (kvm_arch_setup_async_pf(vcpu)) |
2633 | return 0; | |
2634 | return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1); | |
a76ccff6 | 2635 | } |
71f116bf | 2636 | return vcpu_post_run_fault_in_sie(vcpu); |
3fb4c40f TH |
2637 | } |
2638 | ||
2639 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
2640 | { | |
2641 | int rc, exit_reason; | |
2642 | ||
800c1065 TH |
2643 | /* |
2644 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
2645 | * ning the guest), so that memslots (and other stuff) are protected | |
2646 | */ | |
2647 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2648 | ||
a76ccff6 TH |
2649 | do { |
2650 | rc = vcpu_pre_run(vcpu); | |
2651 | if (rc) | |
2652 | break; | |
3fb4c40f | 2653 | |
800c1065 | 2654 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
2655 | /* |
2656 | * As PF_VCPU will be used in fault handler, between | |
2657 | * guest_enter and guest_exit should be no uaccess. | |
2658 | */ | |
0097d12e | 2659 | local_irq_disable(); |
6edaa530 | 2660 | guest_enter_irqoff(); |
db0758b2 | 2661 | __disable_cpu_timer_accounting(vcpu); |
0097d12e | 2662 | local_irq_enable(); |
a76ccff6 TH |
2663 | exit_reason = sie64a(vcpu->arch.sie_block, |
2664 | vcpu->run->s.regs.gprs); | |
0097d12e | 2665 | local_irq_disable(); |
db0758b2 | 2666 | __enable_cpu_timer_accounting(vcpu); |
6edaa530 | 2667 | guest_exit_irqoff(); |
0097d12e | 2668 | local_irq_enable(); |
800c1065 | 2669 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
2670 | |
2671 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 2672 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2673 | |
800c1065 | 2674 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2675 | return rc; |
b0c632db HC |
2676 | } |
2677 | ||
b028ee3e DH |
2678 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2679 | { | |
2680 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2681 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2682 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2683 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2684 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2685 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2686 | /* some control register changes require a tlb flush */ |
2687 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2688 | } |
2689 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
4287f247 | 2690 | kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm); |
b028ee3e DH |
2691 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; |
2692 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2693 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2694 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2695 | } | |
2696 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2697 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2698 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2699 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2700 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2701 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e | 2702 | } |
80cd8763 FZ |
2703 | /* |
2704 | * If userspace sets the riccb (e.g. after migration) to a valid state, | |
2705 | * we should enable RI here instead of doing the lazy enablement. | |
2706 | */ | |
2707 | if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) && | |
2708 | test_kvm_facility(vcpu->kvm, 64)) { | |
2709 | struct runtime_instr_cb *riccb = | |
2710 | (struct runtime_instr_cb *) &kvm_run->s.regs.riccb; | |
2711 | ||
2712 | if (riccb->valid) | |
2713 | vcpu->arch.sie_block->ecb3 |= 0x01; | |
2714 | } | |
31d8b8d4 CB |
2715 | save_access_regs(vcpu->arch.host_acrs); |
2716 | restore_access_regs(vcpu->run->s.regs.acrs); | |
e1788bb9 CB |
2717 | /* save host (userspace) fprs/vrs */ |
2718 | save_fpu_regs(); | |
2719 | vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; | |
2720 | vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; | |
2721 | if (MACHINE_HAS_VX) | |
2722 | current->thread.fpu.regs = vcpu->run->s.regs.vrs; | |
2723 | else | |
2724 | current->thread.fpu.regs = vcpu->run->s.regs.fprs; | |
2725 | current->thread.fpu.fpc = vcpu->run->s.regs.fpc; | |
2726 | if (test_fp_ctl(current->thread.fpu.fpc)) | |
2727 | /* User space provided an invalid FPC, let's clear it */ | |
2728 | current->thread.fpu.fpc = 0; | |
80cd8763 | 2729 | |
b028ee3e DH |
2730 | kvm_run->kvm_dirty_regs = 0; |
2731 | } | |
2732 | ||
2733 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2734 | { | |
2735 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2736 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2737 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2738 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
4287f247 | 2739 | kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu); |
b028ee3e DH |
2740 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; |
2741 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2742 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2743 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2744 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2745 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2746 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
31d8b8d4 CB |
2747 | save_access_regs(vcpu->run->s.regs.acrs); |
2748 | restore_access_regs(vcpu->arch.host_acrs); | |
e1788bb9 CB |
2749 | /* Save guest register state */ |
2750 | save_fpu_regs(); | |
2751 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; | |
2752 | /* Restore will be done lazily at return */ | |
2753 | current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; | |
2754 | current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; | |
2755 | ||
b028ee3e DH |
2756 | } |
2757 | ||
b0c632db HC |
2758 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2759 | { | |
8f2abe6a | 2760 | int rc; |
b0c632db HC |
2761 | sigset_t sigsaved; |
2762 | ||
27291e21 DH |
2763 | if (guestdbg_exit_pending(vcpu)) { |
2764 | kvm_s390_prepare_debug_exit(vcpu); | |
2765 | return 0; | |
2766 | } | |
2767 | ||
b0c632db HC |
2768 | if (vcpu->sigset_active) |
2769 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2770 | ||
6352e4d2 DH |
2771 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2772 | kvm_s390_vcpu_start(vcpu); | |
2773 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 2774 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
2775 | vcpu->vcpu_id); |
2776 | return -EINVAL; | |
2777 | } | |
b0c632db | 2778 | |
b028ee3e | 2779 | sync_regs(vcpu, kvm_run); |
db0758b2 | 2780 | enable_cpu_timer_accounting(vcpu); |
d7b0b5eb | 2781 | |
dab4079d | 2782 | might_fault(); |
a76ccff6 | 2783 | rc = __vcpu_run(vcpu); |
9ace903d | 2784 | |
b1d16c49 CE |
2785 | if (signal_pending(current) && !rc) { |
2786 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2787 | rc = -EINTR; |
b1d16c49 | 2788 | } |
8f2abe6a | 2789 | |
27291e21 DH |
2790 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2791 | kvm_s390_prepare_debug_exit(vcpu); | |
2792 | rc = 0; | |
2793 | } | |
2794 | ||
8f2abe6a | 2795 | if (rc == -EREMOTE) { |
71f116bf | 2796 | /* userspace support is needed, kvm_run has been prepared */ |
8f2abe6a CB |
2797 | rc = 0; |
2798 | } | |
b0c632db | 2799 | |
db0758b2 | 2800 | disable_cpu_timer_accounting(vcpu); |
b028ee3e | 2801 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2802 | |
b0c632db HC |
2803 | if (vcpu->sigset_active) |
2804 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2805 | ||
b0c632db | 2806 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2807 | return rc; |
b0c632db HC |
2808 | } |
2809 | ||
b0c632db HC |
2810 | /* |
2811 | * store status at address | |
2812 | * we use have two special cases: | |
2813 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2814 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2815 | */ | |
d0bce605 | 2816 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2817 | { |
092670cd | 2818 | unsigned char archmode = 1; |
9abc2a08 | 2819 | freg_t fprs[NUM_FPRS]; |
fda902cb | 2820 | unsigned int px; |
4287f247 | 2821 | u64 clkcomp, cputm; |
d0bce605 | 2822 | int rc; |
b0c632db | 2823 | |
d9a3a09a | 2824 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 HC |
2825 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2826 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2827 | return -EFAULT; |
d9a3a09a | 2828 | gpa = 0; |
d0bce605 HC |
2829 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
2830 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2831 | return -EFAULT; |
d9a3a09a MS |
2832 | gpa = px; |
2833 | } else | |
2834 | gpa -= __LC_FPREGS_SAVE_AREA; | |
9abc2a08 DH |
2835 | |
2836 | /* manually convert vector registers if necessary */ | |
2837 | if (MACHINE_HAS_VX) { | |
9522b37f | 2838 | convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); |
9abc2a08 DH |
2839 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, |
2840 | fprs, 128); | |
2841 | } else { | |
2842 | rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, | |
6fd8e67d | 2843 | vcpu->run->s.regs.fprs, 128); |
9abc2a08 | 2844 | } |
d9a3a09a | 2845 | rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA, |
d0bce605 | 2846 | vcpu->run->s.regs.gprs, 128); |
d9a3a09a | 2847 | rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA, |
d0bce605 | 2848 | &vcpu->arch.sie_block->gpsw, 16); |
d9a3a09a | 2849 | rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA, |
fda902cb | 2850 | &px, 4); |
d9a3a09a | 2851 | rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA, |
9abc2a08 | 2852 | &vcpu->run->s.regs.fpc, 4); |
d9a3a09a | 2853 | rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA, |
d0bce605 | 2854 | &vcpu->arch.sie_block->todpr, 4); |
4287f247 | 2855 | cputm = kvm_s390_get_cpu_timer(vcpu); |
d9a3a09a | 2856 | rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA, |
4287f247 | 2857 | &cputm, 8); |
178bd789 | 2858 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d9a3a09a | 2859 | rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA, |
d0bce605 | 2860 | &clkcomp, 8); |
d9a3a09a | 2861 | rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA, |
d0bce605 | 2862 | &vcpu->run->s.regs.acrs, 64); |
d9a3a09a | 2863 | rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA, |
d0bce605 HC |
2864 | &vcpu->arch.sie_block->gcr, 128); |
2865 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2866 | } |
2867 | ||
e879892c TH |
2868 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2869 | { | |
2870 | /* | |
2871 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
31d8b8d4 | 2872 | * switch in the run ioctl. Let's update our copies before we save |
e879892c TH |
2873 | * it into the save area |
2874 | */ | |
d0164ee2 | 2875 | save_fpu_regs(); |
9abc2a08 | 2876 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
e879892c TH |
2877 | save_access_regs(vcpu->run->s.regs.acrs); |
2878 | ||
2879 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2880 | } | |
2881 | ||
8ad35755 DH |
2882 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2883 | { | |
2884 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 2885 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
2886 | } |
2887 | ||
2888 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2889 | { | |
2890 | unsigned int i; | |
2891 | struct kvm_vcpu *vcpu; | |
2892 | ||
2893 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2894 | __disable_ibs_on_vcpu(vcpu); | |
2895 | } | |
2896 | } | |
2897 | ||
2898 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2899 | { | |
09a400e7 DH |
2900 | if (!sclp.has_ibs) |
2901 | return; | |
8ad35755 | 2902 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); |
8e236546 | 2903 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
2904 | } |
2905 | ||
6852d7b6 DH |
2906 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2907 | { | |
8ad35755 DH |
2908 | int i, online_vcpus, started_vcpus = 0; |
2909 | ||
2910 | if (!is_vcpu_stopped(vcpu)) | |
2911 | return; | |
2912 | ||
6852d7b6 | 2913 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2914 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2915 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2916 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2917 | ||
2918 | for (i = 0; i < online_vcpus; i++) { | |
2919 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2920 | started_vcpus++; | |
2921 | } | |
2922 | ||
2923 | if (started_vcpus == 0) { | |
2924 | /* we're the only active VCPU -> speed it up */ | |
2925 | __enable_ibs_on_vcpu(vcpu); | |
2926 | } else if (started_vcpus == 1) { | |
2927 | /* | |
2928 | * As we are starting a second VCPU, we have to disable | |
2929 | * the IBS facility on all VCPUs to remove potentially | |
2930 | * oustanding ENABLE requests. | |
2931 | */ | |
2932 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2933 | } | |
2934 | ||
805de8f4 | 2935 | atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2936 | /* |
2937 | * Another VCPU might have used IBS while we were offline. | |
2938 | * Let's play safe and flush the VCPU at startup. | |
2939 | */ | |
d3d692c8 | 2940 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2941 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2942 | return; |
6852d7b6 DH |
2943 | } |
2944 | ||
2945 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2946 | { | |
8ad35755 DH |
2947 | int i, online_vcpus, started_vcpus = 0; |
2948 | struct kvm_vcpu *started_vcpu = NULL; | |
2949 | ||
2950 | if (is_vcpu_stopped(vcpu)) | |
2951 | return; | |
2952 | ||
6852d7b6 | 2953 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2954 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2955 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2956 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2957 | ||
32f5ff63 | 2958 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2959 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2960 | |
805de8f4 | 2961 | atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2962 | __disable_ibs_on_vcpu(vcpu); |
2963 | ||
2964 | for (i = 0; i < online_vcpus; i++) { | |
2965 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2966 | started_vcpus++; | |
2967 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2968 | } | |
2969 | } | |
2970 | ||
2971 | if (started_vcpus == 1) { | |
2972 | /* | |
2973 | * As we only have one VCPU left, we want to enable the | |
2974 | * IBS facility for that VCPU to speed it up. | |
2975 | */ | |
2976 | __enable_ibs_on_vcpu(started_vcpu); | |
2977 | } | |
2978 | ||
433b9ee4 | 2979 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2980 | return; |
6852d7b6 DH |
2981 | } |
2982 | ||
d6712df9 CH |
2983 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2984 | struct kvm_enable_cap *cap) | |
2985 | { | |
2986 | int r; | |
2987 | ||
2988 | if (cap->flags) | |
2989 | return -EINVAL; | |
2990 | ||
2991 | switch (cap->cap) { | |
fa6b7fe9 CH |
2992 | case KVM_CAP_S390_CSS_SUPPORT: |
2993 | if (!vcpu->kvm->arch.css_support) { | |
2994 | vcpu->kvm->arch.css_support = 1; | |
c92ea7b9 | 2995 | VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
fa6b7fe9 CH |
2996 | trace_kvm_s390_enable_css(vcpu->kvm); |
2997 | } | |
2998 | r = 0; | |
2999 | break; | |
d6712df9 CH |
3000 | default: |
3001 | r = -EINVAL; | |
3002 | break; | |
3003 | } | |
3004 | return r; | |
3005 | } | |
3006 | ||
41408c28 TH |
3007 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
3008 | struct kvm_s390_mem_op *mop) | |
3009 | { | |
3010 | void __user *uaddr = (void __user *)mop->buf; | |
3011 | void *tmpbuf = NULL; | |
3012 | int r, srcu_idx; | |
3013 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
3014 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
3015 | ||
3016 | if (mop->flags & ~supported_flags) | |
3017 | return -EINVAL; | |
3018 | ||
3019 | if (mop->size > MEM_OP_MAX_SIZE) | |
3020 | return -E2BIG; | |
3021 | ||
3022 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
3023 | tmpbuf = vmalloc(mop->size); | |
3024 | if (!tmpbuf) | |
3025 | return -ENOMEM; | |
3026 | } | |
3027 | ||
3028 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
3029 | ||
3030 | switch (mop->op) { | |
3031 | case KVM_S390_MEMOP_LOGICAL_READ: | |
3032 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
3033 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
3034 | mop->size, GACC_FETCH); | |
41408c28 TH |
3035 | break; |
3036 | } | |
3037 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
3038 | if (r == 0) { | |
3039 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
3040 | r = -EFAULT; | |
3041 | } | |
3042 | break; | |
3043 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
3044 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
92c96321 DH |
3045 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
3046 | mop->size, GACC_STORE); | |
41408c28 TH |
3047 | break; |
3048 | } | |
3049 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
3050 | r = -EFAULT; | |
3051 | break; | |
3052 | } | |
3053 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
3054 | break; | |
3055 | default: | |
3056 | r = -EINVAL; | |
3057 | } | |
3058 | ||
3059 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
3060 | ||
3061 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
3062 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
3063 | ||
3064 | vfree(tmpbuf); | |
3065 | return r; | |
3066 | } | |
3067 | ||
b0c632db HC |
3068 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3069 | unsigned int ioctl, unsigned long arg) | |
3070 | { | |
3071 | struct kvm_vcpu *vcpu = filp->private_data; | |
3072 | void __user *argp = (void __user *)arg; | |
800c1065 | 3073 | int idx; |
bc923cc9 | 3074 | long r; |
b0c632db | 3075 | |
93736624 | 3076 | switch (ioctl) { |
47b43c52 JF |
3077 | case KVM_S390_IRQ: { |
3078 | struct kvm_s390_irq s390irq; | |
3079 | ||
3080 | r = -EFAULT; | |
3081 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
3082 | break; | |
3083 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
3084 | break; | |
3085 | } | |
93736624 | 3086 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 3087 | struct kvm_s390_interrupt s390int; |
383d0b05 | 3088 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 3089 | |
93736624 | 3090 | r = -EFAULT; |
ba5c1e9b | 3091 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 3092 | break; |
383d0b05 JF |
3093 | if (s390int_to_s390irq(&s390int, &s390irq)) |
3094 | return -EINVAL; | |
3095 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 3096 | break; |
ba5c1e9b | 3097 | } |
b0c632db | 3098 | case KVM_S390_STORE_STATUS: |
800c1065 | 3099 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 3100 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 3101 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 3102 | break; |
b0c632db HC |
3103 | case KVM_S390_SET_INITIAL_PSW: { |
3104 | psw_t psw; | |
3105 | ||
bc923cc9 | 3106 | r = -EFAULT; |
b0c632db | 3107 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
3108 | break; |
3109 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
3110 | break; | |
b0c632db HC |
3111 | } |
3112 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
3113 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
3114 | break; | |
14eebd91 CO |
3115 | case KVM_SET_ONE_REG: |
3116 | case KVM_GET_ONE_REG: { | |
3117 | struct kvm_one_reg reg; | |
3118 | r = -EFAULT; | |
3119 | if (copy_from_user(®, argp, sizeof(reg))) | |
3120 | break; | |
3121 | if (ioctl == KVM_SET_ONE_REG) | |
3122 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
3123 | else | |
3124 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
3125 | break; | |
3126 | } | |
27e0393f CO |
3127 | #ifdef CONFIG_KVM_S390_UCONTROL |
3128 | case KVM_S390_UCAS_MAP: { | |
3129 | struct kvm_s390_ucas_mapping ucasmap; | |
3130 | ||
3131 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
3132 | r = -EFAULT; | |
3133 | break; | |
3134 | } | |
3135 | ||
3136 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
3137 | r = -EINVAL; | |
3138 | break; | |
3139 | } | |
3140 | ||
3141 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
3142 | ucasmap.vcpu_addr, ucasmap.length); | |
3143 | break; | |
3144 | } | |
3145 | case KVM_S390_UCAS_UNMAP: { | |
3146 | struct kvm_s390_ucas_mapping ucasmap; | |
3147 | ||
3148 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
3149 | r = -EFAULT; | |
3150 | break; | |
3151 | } | |
3152 | ||
3153 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
3154 | r = -EINVAL; | |
3155 | break; | |
3156 | } | |
3157 | ||
3158 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
3159 | ucasmap.length); | |
3160 | break; | |
3161 | } | |
3162 | #endif | |
ccc7910f | 3163 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 3164 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
3165 | break; |
3166 | } | |
d6712df9 CH |
3167 | case KVM_ENABLE_CAP: |
3168 | { | |
3169 | struct kvm_enable_cap cap; | |
3170 | r = -EFAULT; | |
3171 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3172 | break; | |
3173 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3174 | break; | |
3175 | } | |
41408c28 TH |
3176 | case KVM_S390_MEM_OP: { |
3177 | struct kvm_s390_mem_op mem_op; | |
3178 | ||
3179 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
3180 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
3181 | else | |
3182 | r = -EFAULT; | |
3183 | break; | |
3184 | } | |
816c7667 JF |
3185 | case KVM_S390_SET_IRQ_STATE: { |
3186 | struct kvm_s390_irq_state irq_state; | |
3187 | ||
3188 | r = -EFAULT; | |
3189 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
3190 | break; | |
3191 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
3192 | irq_state.len == 0 || | |
3193 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
3194 | r = -EINVAL; | |
3195 | break; | |
3196 | } | |
3197 | r = kvm_s390_set_irq_state(vcpu, | |
3198 | (void __user *) irq_state.buf, | |
3199 | irq_state.len); | |
3200 | break; | |
3201 | } | |
3202 | case KVM_S390_GET_IRQ_STATE: { | |
3203 | struct kvm_s390_irq_state irq_state; | |
3204 | ||
3205 | r = -EFAULT; | |
3206 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
3207 | break; | |
3208 | if (irq_state.len == 0) { | |
3209 | r = -EINVAL; | |
3210 | break; | |
3211 | } | |
3212 | r = kvm_s390_get_irq_state(vcpu, | |
3213 | (__u8 __user *) irq_state.buf, | |
3214 | irq_state.len); | |
3215 | break; | |
3216 | } | |
b0c632db | 3217 | default: |
3e6afcf1 | 3218 | r = -ENOTTY; |
b0c632db | 3219 | } |
bc923cc9 | 3220 | return r; |
b0c632db HC |
3221 | } |
3222 | ||
5b1c1493 CO |
3223 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3224 | { | |
3225 | #ifdef CONFIG_KVM_S390_UCONTROL | |
3226 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
3227 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
3228 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
3229 | get_page(vmf->page); | |
3230 | return 0; | |
3231 | } | |
3232 | #endif | |
3233 | return VM_FAULT_SIGBUS; | |
3234 | } | |
3235 | ||
5587027c AK |
3236 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
3237 | unsigned long npages) | |
db3fe4eb TY |
3238 | { |
3239 | return 0; | |
3240 | } | |
3241 | ||
b0c632db | 3242 | /* Section: memory related */ |
f7784b8e MT |
3243 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
3244 | struct kvm_memory_slot *memslot, | |
09170a49 | 3245 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 3246 | enum kvm_mr_change change) |
b0c632db | 3247 | { |
dd2887e7 NW |
3248 | /* A few sanity checks. We can have memory slots which have to be |
3249 | located/ended at a segment boundary (1MB). The memory in userland is | |
3250 | ok to be fragmented into various different vmas. It is okay to mmap() | |
3251 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 3252 | |
598841ca | 3253 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
3254 | return -EINVAL; |
3255 | ||
598841ca | 3256 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
3257 | return -EINVAL; |
3258 | ||
a3a92c31 DD |
3259 | if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit) |
3260 | return -EINVAL; | |
3261 | ||
f7784b8e MT |
3262 | return 0; |
3263 | } | |
3264 | ||
3265 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 3266 | const struct kvm_userspace_memory_region *mem, |
8482644a | 3267 | const struct kvm_memory_slot *old, |
f36f3f28 | 3268 | const struct kvm_memory_slot *new, |
8482644a | 3269 | enum kvm_mr_change change) |
f7784b8e | 3270 | { |
f7850c92 | 3271 | int rc; |
f7784b8e | 3272 | |
2cef4deb CB |
3273 | /* If the basics of the memslot do not change, we do not want |
3274 | * to update the gmap. Every update causes several unnecessary | |
3275 | * segment translation exceptions. This is usually handled just | |
3276 | * fine by the normal fault handler + gmap, but it will also | |
3277 | * cause faults on the prefix page of running guest CPUs. | |
3278 | */ | |
3279 | if (old->userspace_addr == mem->userspace_addr && | |
3280 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
3281 | old->npages * PAGE_SIZE == mem->memory_size) | |
3282 | return; | |
598841ca CO |
3283 | |
3284 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
3285 | mem->guest_phys_addr, mem->memory_size); | |
3286 | if (rc) | |
ea2cdd27 | 3287 | pr_warn("failed to commit memory region\n"); |
598841ca | 3288 | return; |
b0c632db HC |
3289 | } |
3290 | ||
60a37709 AY |
3291 | static inline unsigned long nonhyp_mask(int i) |
3292 | { | |
3293 | unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30; | |
3294 | ||
3295 | return 0x0000ffffffffffffUL >> (nonhyp_fai << 4); | |
3296 | } | |
3297 | ||
3491caf2 CB |
3298 | void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) |
3299 | { | |
3300 | vcpu->valid_wakeup = false; | |
3301 | } | |
3302 | ||
b0c632db HC |
3303 | static int __init kvm_s390_init(void) |
3304 | { | |
60a37709 AY |
3305 | int i; |
3306 | ||
07197fd0 DH |
3307 | if (!sclp.has_sief2) { |
3308 | pr_info("SIE not available\n"); | |
3309 | return -ENODEV; | |
3310 | } | |
3311 | ||
60a37709 AY |
3312 | for (i = 0; i < 16; i++) |
3313 | kvm_s390_fac_list_mask[i] |= | |
3314 | S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i); | |
3315 | ||
9d8d5786 | 3316 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
3317 | } |
3318 | ||
3319 | static void __exit kvm_s390_exit(void) | |
3320 | { | |
3321 | kvm_exit(); | |
3322 | } | |
3323 | ||
3324 | module_init(kvm_s390_init); | |
3325 | module_exit(kvm_s390_exit); | |
566af940 CH |
3326 | |
3327 | /* | |
3328 | * Enable autoloading of the kvm module. | |
3329 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
3330 | * since x86 takes a different approach. | |
3331 | */ | |
3332 | #include <linux/miscdevice.h> | |
3333 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
3334 | MODULE_ALIAS("devname:kvm"); |