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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into...
[mirror_ubuntu-artful-kernel.git] / arch / s390 / kvm / kvm-s390.c
CommitLineData
b0c632db 1/*
a53c8fab 2 * hosting zSeries kernel virtual machines
b0c632db 3 *
a53c8fab 4 * Copyright IBM Corp. 2008, 2009
b0c632db
HC		 5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
12 * Heiko Carstens <heiko.carstens@de.ibm.com>
628eb9b8 13 * Christian Ehrhardt <ehrhardt@de.ibm.com>
15f36ebd 14 * Jason J. Herne <jjherne@us.ibm.com>
b0c632db
HC		 15 */
16
17#include <linux/compiler.h>
18#include <linux/err.h>
19#include <linux/fs.h>
ca872302 20#include <linux/hrtimer.h>
b0c632db
HC		 21#include <linux/init.h>
22#include <linux/kvm.h>
23#include <linux/kvm_host.h>
b2d73b2a 24#include <linux/mman.h>
b0c632db 25#include <linux/module.h>
d3217967 26#include <linux/moduleparam.h>
a374e892 27#include <linux/random.h>
b0c632db 28#include <linux/slab.h>
ba5c1e9b 29#include <linux/timer.h>
41408c28 30#include <linux/vmalloc.h>
15c9705f 31#include <linux/bitmap.h>
174cd4b1
IM		 32#include <linux/sched/signal.h>
33
cbb870c8 34#include <asm/asm-offsets.h>
b0c632db 35#include <asm/lowcore.h>
fd5ada04 36#include <asm/stp.h>
b0c632db 37#include <asm/pgtable.h>
1e133ab2 38#include <asm/gmap.h>
f5daba1d 39#include <asm/nmi.h>
a0616cde 40#include <asm/switch_to.h>
6d3da241 41#include <asm/isc.h>
1526bf9c 42#include <asm/sclp.h>
0a763c78 43#include <asm/cpacf.h>
221bb8a4 44#include <asm/timex.h>
8f2abe6a 45#include "kvm-s390.h"
b0c632db
HC		 46#include "gaccess.h"
47
ea2cdd27
DH		 48#define KMSG_COMPONENT "kvm-s390"
49#undef pr_fmt
50#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
51
5786fffa
CH		 52#define CREATE_TRACE_POINTS
53#include "trace.h"
ade38c31 54#include "trace-s390.h"
5786fffa 55
41408c28 56#define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */
816c7667
JF		 57#define LOCAL_IRQS 32
58#define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
59 (KVM_MAX_VCPUS + LOCAL_IRQS))
41408c28 60
b0c632db
HC		 61#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
62
63struct kvm_stats_debugfs_item debugfs_entries[] = {
64 { "userspace_handled", VCPU_STAT(exit_userspace) },
0eaeafa1 65 { "exit_null", VCPU_STAT(exit_null) },
8f2abe6a
CB		 66 { "exit_validity", VCPU_STAT(exit_validity) },
67 { "exit_stop_request", VCPU_STAT(exit_stop_request) },
68 { "exit_external_request", VCPU_STAT(exit_external_request) },
69 { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
ba5c1e9b 70 { "exit_instruction", VCPU_STAT(exit_instruction) },
9ec6de19 71 { "exit_pei", VCPU_STAT(exit_pei) },
ba5c1e9b
CO		 72 { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
73 { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
a011eeb2 74 { "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
f7819512 75 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
62bea5bf 76 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
3491caf2 77 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
ce2e4f0b 78 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
f5e10b09 79 { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
ba5c1e9b 80 { "instruction_lctl", VCPU_STAT(instruction_lctl) },
aba07508
DH		 81 { "instruction_stctl", VCPU_STAT(instruction_stctl) },
82 { "instruction_stctg", VCPU_STAT(instruction_stctg) },
ba5c1e9b 83 { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
7697e71f 84 { "deliver_external_call", VCPU_STAT(deliver_external_call) },
ba5c1e9b
CO		 85 { "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
86 { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) },
87 { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
88 { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
89 { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
90 { "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
91 { "exit_wait_state", VCPU_STAT(exit_wait_state) },
69d0d3a3 92 { "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
453423dc
CB		 93 { "instruction_stidp", VCPU_STAT(instruction_stidp) },
94 { "instruction_spx", VCPU_STAT(instruction_spx) },
95 { "instruction_stpx", VCPU_STAT(instruction_stpx) },
96 { "instruction_stap", VCPU_STAT(instruction_stap) },
97 { "instruction_storage_key", VCPU_STAT(instruction_storage_key) },
8a242234 98 { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
453423dc
CB		 99 { "instruction_stsch", VCPU_STAT(instruction_stsch) },
100 { "instruction_chsc", VCPU_STAT(instruction_chsc) },
b31288fa 101 { "instruction_essa", VCPU_STAT(instruction_essa) },
453423dc
CB		 102 { "instruction_stsi", VCPU_STAT(instruction_stsi) },
103 { "instruction_stfl", VCPU_STAT(instruction_stfl) },
bb25b9ba 104 { "instruction_tprot", VCPU_STAT(instruction_tprot) },
95ca2cb5 105 { "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
a3508fbe 106 { "instruction_sie", VCPU_STAT(instruction_sie) },
5288fbf0 107 { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
bd59d3a4 108 { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
7697e71f 109 { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
5288fbf0 110 { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
42cb0c9f
DH		 111 { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
112 { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
5288fbf0 113 { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
42cb0c9f
DH		 114 { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
115 { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
cd7b4b61 116 { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
5288fbf0
CB		 117 { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
118 { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
119 { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
42cb0c9f
DH		 120 { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) },
121 { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) },
122 { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) },
388186bc 123 { "diagnose_10", VCPU_STAT(diagnose_10) },
e28acfea 124 { "diagnose_44", VCPU_STAT(diagnose_44) },
41628d33 125 { "diagnose_9c", VCPU_STAT(diagnose_9c) },
175a5c9e
CB		 126 { "diagnose_258", VCPU_STAT(diagnose_258) },
127 { "diagnose_308", VCPU_STAT(diagnose_308) },
128 { "diagnose_500", VCPU_STAT(diagnose_500) },
b0c632db
HC		 129 { NULL }
130};
131
a411edf1
DH		 132/* allow nested virtualization in KVM (if enabled by user space) */
133static int nested;
134module_param(nested, int, S_IRUGO);
135MODULE_PARM_DESC(nested, "Nested virtualization support");
136
9d8d5786 137/* upper facilities limit for kvm */
f6c1d359 138unsigned long kvm_s390_fac_list_mask[16] = { FACILITIES_KVM };
b0c632db 139
9d8d5786 140unsigned long kvm_s390_fac_list_mask_size(void)
78c4b59f 141{
9d8d5786
MM		 142 BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64);
143 return ARRAY_SIZE(kvm_s390_fac_list_mask);
78c4b59f
MM		 144}
145
15c9705f
DH		 146/* available cpu features supported by kvm */
147static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
0a763c78
DH		 148/* available subfunctions indicated via query / "test bit" */
149static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;
15c9705f 150
9d8d5786 151static struct gmap_notifier gmap_notifier;
a3508fbe 152static struct gmap_notifier vsie_gmap_notifier;
78f26131 153debug_info_t *kvm_s390_dbf;
9d8d5786 154
b0c632db 155/* Section: not file related */
13a34e06 156int kvm_arch_hardware_enable(void)
b0c632db
HC		 157{
158 /* every s390 is virtualization enabled ;-) */
10474ae8 159 return 0;
b0c632db
HC		 160}
161
414d3b07
MS		 162static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
163 unsigned long end);
2c70fe44 164
fdf03650
FZ		 165/*
166 * This callback is executed during stop_machine(). All CPUs are therefore
167 * temporarily stopped. In order not to change guest behavior, we have to
168 * disable preemption whenever we touch the epoch of kvm and the VCPUs,
169 * so a CPU won't be stopped while calculating with the epoch.
170 */
171static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
172 void *v)
173{
174 struct kvm *kvm;
175 struct kvm_vcpu *vcpu;
176 int i;
177 unsigned long long *delta = v;
178
179 list_for_each_entry(kvm, &vm_list, vm_list) {
180 kvm->arch.epoch -= *delta;
181 kvm_for_each_vcpu(i, vcpu, kvm) {
182 vcpu->arch.sie_block->epoch -= *delta;
db0758b2
DH		 183 if (vcpu->arch.cputm_enabled)
184 vcpu->arch.cputm_start += *delta;
91473b48
DH		 185 if (vcpu->arch.vsie_block)
186 vcpu->arch.vsie_block->epoch -= *delta;
fdf03650
FZ		 187 }
188 }
189 return NOTIFY_OK;
190}
191
192static struct notifier_block kvm_clock_notifier = {
193 .notifier_call = kvm_clock_sync,
194};
195
b0c632db
HC		 196int kvm_arch_hardware_setup(void)
197{
2c70fe44 198 gmap_notifier.notifier_call = kvm_gmap_notifier;
b2d73b2a 199 gmap_register_pte_notifier(&gmap_notifier);
a3508fbe
DH		 200 vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier;
201 gmap_register_pte_notifier(&vsie_gmap_notifier);
fdf03650
FZ		 202 atomic_notifier_chain_register(&s390_epoch_delta_notifier,
203 &kvm_clock_notifier);
b0c632db
HC		 204 return 0;
205}
206
207void kvm_arch_hardware_unsetup(void)
208{
b2d73b2a 209 gmap_unregister_pte_notifier(&gmap_notifier);
a3508fbe 210 gmap_unregister_pte_notifier(&vsie_gmap_notifier);
fdf03650
FZ		 211 atomic_notifier_chain_unregister(&s390_epoch_delta_notifier,
212 &kvm_clock_notifier);
b0c632db
HC		 213}
214
22be5a13
DH		 215static void allow_cpu_feat(unsigned long nr)
216{
217 set_bit_inv(nr, kvm_s390_available_cpu_feat);
218}
219
0a763c78
DH		 220static inline int plo_test_bit(unsigned char nr)
221{
222 register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
d051ae53 223 int cc;
0a763c78
DH		 224
225 asm volatile(
226 /* Parameter registers are ignored for "test bit" */
227 " plo 0,0,0,0(0)\n"
228 " ipm %0\n"
229 " srl %0,28\n"
230 : "=d" (cc)
231 : "d" (r0)
232 : "cc");
233 return cc == 0;
234}
235
22be5a13
DH		 236static void kvm_s390_cpu_feat_init(void)
237{
0a763c78
DH		 238 int i;
239
240 for (i = 0; i < 256; ++i) {
241 if (plo_test_bit(i))
242 kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7);
243 }
244
245 if (test_facility(28)) /* TOD-clock steering */
221bb8a4
LT		 246 ptff(kvm_s390_available_subfunc.ptff,
247 sizeof(kvm_s390_available_subfunc.ptff),
248 PTFF_QAF);
0a763c78
DH		 249
250 if (test_facility(17)) { /* MSA */
69c0e360
MS		 251 __cpacf_query(CPACF_KMAC, (cpacf_mask_t *)
252 kvm_s390_available_subfunc.kmac);
253 __cpacf_query(CPACF_KMC, (cpacf_mask_t *)
254 kvm_s390_available_subfunc.kmc);
255 __cpacf_query(CPACF_KM, (cpacf_mask_t *)
256 kvm_s390_available_subfunc.km);
257 __cpacf_query(CPACF_KIMD, (cpacf_mask_t *)
258 kvm_s390_available_subfunc.kimd);
259 __cpacf_query(CPACF_KLMD, (cpacf_mask_t *)
260 kvm_s390_available_subfunc.klmd);
0a763c78
DH		 261 }
262 if (test_facility(76)) /* MSA3 */
69c0e360
MS		 263 __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *)
264 kvm_s390_available_subfunc.pckmo);
0a763c78 265 if (test_facility(77)) { /* MSA4 */
69c0e360
MS		 266 __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *)
267 kvm_s390_available_subfunc.kmctr);
268 __cpacf_query(CPACF_KMF, (cpacf_mask_t *)
269 kvm_s390_available_subfunc.kmf);
270 __cpacf_query(CPACF_KMO, (cpacf_mask_t *)
271 kvm_s390_available_subfunc.kmo);
272 __cpacf_query(CPACF_PCC, (cpacf_mask_t *)
273 kvm_s390_available_subfunc.pcc);
0a763c78
DH		 274 }
275 if (test_facility(57)) /* MSA5 */
69c0e360
MS		 276 __cpacf_query(CPACF_PPNO, (cpacf_mask_t *)
277 kvm_s390_available_subfunc.ppno);
0a763c78 278
22be5a13
DH		 279 if (MACHINE_HAS_ESOP)
280 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
a3508fbe
DH		 281 /*
282 * We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
283 * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
284 */
285 if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
a411edf1 286 !test_facility(3) || !nested)
a3508fbe
DH		 287 return;
288 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
19c439b5
DH		 289 if (sclp.has_64bscao)
290 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
0615a326
DH		 291 if (sclp.has_siif)
292 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
77d18f6d
DH		 293 if (sclp.has_gpere)
294 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE);
a1b7b9b2
DH		 295 if (sclp.has_gsls)
296 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
5630a8e8
DH		 297 if (sclp.has_ib)
298 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
13ee3f67
DH		 299 if (sclp.has_cei)
300 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
7fd7f39d
DH		 301 if (sclp.has_ibs)
302 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
5d3876a8
DH		 303 /*
304 * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
305 * all skey handling functions read/set the skey from the PGSTE
306 * instead of the real storage key.
307 *
308 * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make
309 * pages being detected as preserved although they are resident.
310 *
311 * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will
312 * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY.
313 *
314 * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and
315 * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be
316 * correctly shadowed. We can do that for the PGSTE but not for PTE.I.
317 *
318 * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We
319 * cannot easily shadow the SCA because of the ipte lock.
320 */
22be5a13
DH		 321}
322
b0c632db
HC		 323int kvm_arch_init(void *opaque)
324{
78f26131
CB		 325 kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
326 if (!kvm_s390_dbf)
327 return -ENOMEM;
328
329 if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
330 debug_unregister(kvm_s390_dbf);
331 return -ENOMEM;
332 }
333
22be5a13
DH		 334 kvm_s390_cpu_feat_init();
335
84877d93
CH		 336 /* Register floating interrupt controller interface. */
337 return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
b0c632db
HC		 338}
339
78f26131
CB		 340void kvm_arch_exit(void)
341{
342 debug_unregister(kvm_s390_dbf);
343}
344
b0c632db
HC		 345/* Section: device related */
346long kvm_arch_dev_ioctl(struct file *filp,
347 unsigned int ioctl, unsigned long arg)
348{
349 if (ioctl == KVM_S390_ENABLE_SIE)
350 return s390_enable_sie();
351 return -EINVAL;
352}
353
784aa3d7 354int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
b0c632db 355{
d7b0b5eb
CO		 356 int r;
357
2bd0ac4e 358 switch (ext) {
d7b0b5eb 359 case KVM_CAP_S390_PSW:
b6cf8788 360 case KVM_CAP_S390_GMAP:
52e16b18 361 case KVM_CAP_SYNC_MMU:
1efd0f59
CO		 362#ifdef CONFIG_KVM_S390_UCONTROL
363 case KVM_CAP_S390_UCONTROL:
364#endif
3c038e6b 365 case KVM_CAP_ASYNC_PF:
60b413c9 366 case KVM_CAP_SYNC_REGS:
14eebd91 367 case KVM_CAP_ONE_REG:
d6712df9 368 case KVM_CAP_ENABLE_CAP:
fa6b7fe9 369 case KVM_CAP_S390_CSS_SUPPORT:
10ccaa1e 370 case KVM_CAP_IOEVENTFD:
c05c4186 371 case KVM_CAP_DEVICE_CTRL:
d938dc55 372 case KVM_CAP_ENABLE_CAP_VM:
78599d90 373 case KVM_CAP_S390_IRQCHIP:
f2061656 374 case KVM_CAP_VM_ATTRIBUTES:
6352e4d2 375 case KVM_CAP_MP_STATE:
460df4c1 376 case KVM_CAP_IMMEDIATE_EXIT:
47b43c52 377 case KVM_CAP_S390_INJECT_IRQ:
2444b352 378 case KVM_CAP_S390_USER_SIGP:
e44fc8c9 379 case KVM_CAP_S390_USER_STSI:
30ee2a98 380 case KVM_CAP_S390_SKEYS:
816c7667 381 case KVM_CAP_S390_IRQ_STATE:
6502a34c 382 case KVM_CAP_S390_USER_INSTR0:
d7b0b5eb
CO		 383 r = 1;
384 break;
41408c28
TH		 385 case KVM_CAP_S390_MEM_OP:
386 r = MEM_OP_MAX_SIZE;
387 break;
e726b1bd
CB		 388 case KVM_CAP_NR_VCPUS:
389 case KVM_CAP_MAX_VCPUS:
76a6dd72 390 r = KVM_S390_BSCA_CPU_SLOTS;
a6940674
DH		 391 if (!kvm_s390_use_sca_entries())
392 r = KVM_MAX_VCPUS;
393 else if (sclp.has_esca && sclp.has_64bscao)
76a6dd72 394 r = KVM_S390_ESCA_CPU_SLOTS;
e726b1bd 395 break;
e1e2e605
NW		 396 case KVM_CAP_NR_MEMSLOTS:
397 r = KVM_USER_MEM_SLOTS;
398 break;
1526bf9c 399 case KVM_CAP_S390_COW:
abf09bed 400 r = MACHINE_HAS_ESOP;
1526bf9c 401 break;
68c55750
EF		 402 case KVM_CAP_S390_VECTOR_REGISTERS:
403 r = MACHINE_HAS_VX;
404 break;
c6e5f166
FZ		 405 case KVM_CAP_S390_RI:
406 r = test_facility(64);
407 break;
2bd0ac4e 408 default:
d7b0b5eb 409 r = 0;
2bd0ac4e 410 }
d7b0b5eb 411 return r;
b0c632db
HC		 412}
413
15f36ebd
JH		 414static void kvm_s390_sync_dirty_log(struct kvm *kvm,
415 struct kvm_memory_slot *memslot)
416{
417 gfn_t cur_gfn, last_gfn;
418 unsigned long address;
419 struct gmap *gmap = kvm->arch.gmap;
420
15f36ebd
JH		 421 /* Loop over all guest pages */
422 last_gfn = memslot->base_gfn + memslot->npages;
423 for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) {
424 address = gfn_to_hva_memslot(memslot, cur_gfn);
425
1e133ab2 426 if (test_and_clear_guest_dirty(gmap->mm, address))
15f36ebd 427 mark_page_dirty(kvm, cur_gfn);
1763f8d0
CB		 428 if (fatal_signal_pending(current))
429 return;
70c88a00 430 cond_resched();
15f36ebd 431 }
15f36ebd
JH		 432}
433
b0c632db 434/* Section: vm related */
a6e2f683
ED		 435static void sca_del_vcpu(struct kvm_vcpu *vcpu);
436
b0c632db
HC		 437/*
438 * Get (and clear) the dirty memory log for a memory slot.
439 */
440int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
441 struct kvm_dirty_log *log)
442{
15f36ebd
JH		 443 int r;
444 unsigned long n;
9f6b8029 445 struct kvm_memslots *slots;
15f36ebd
JH		 446 struct kvm_memory_slot *memslot;
447 int is_dirty = 0;
448
e1e8a962
JF		 449 if (kvm_is_ucontrol(kvm))
450 return -EINVAL;
451
15f36ebd
JH		 452 mutex_lock(&kvm->slots_lock);
453
454 r = -EINVAL;
455 if (log->slot >= KVM_USER_MEM_SLOTS)
456 goto out;
457
9f6b8029
PB		 458 slots = kvm_memslots(kvm);
459 memslot = id_to_memslot(slots, log->slot);
15f36ebd
JH		 460 r = -ENOENT;
461 if (!memslot->dirty_bitmap)
462 goto out;
463
464 kvm_s390_sync_dirty_log(kvm, memslot);
465 r = kvm_get_dirty_log(kvm, log, &is_dirty);
466 if (r)
467 goto out;
468
469 /* Clear the dirty log */
470 if (is_dirty) {
471 n = kvm_dirty_bitmap_bytes(memslot);
472 memset(memslot->dirty_bitmap, 0, n);
473 }
474 r = 0;
475out:
476 mutex_unlock(&kvm->slots_lock);
477 return r;
b0c632db
HC		 478}
479
6502a34c
DH		 480static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
481{
482 unsigned int i;
483 struct kvm_vcpu *vcpu;
484
485 kvm_for_each_vcpu(i, vcpu, kvm) {
486 kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu);
487 }
488}
489
d938dc55
CH		 490static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
491{
492 int r;
493
494 if (cap->flags)
495 return -EINVAL;
496
497 switch (cap->cap) {
84223598 498 case KVM_CAP_S390_IRQCHIP:
c92ea7b9 499 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
84223598
CH		 500 kvm->arch.use_irqchip = 1;
501 r = 0;
502 break;
2444b352 503 case KVM_CAP_S390_USER_SIGP:
c92ea7b9 504 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
2444b352
DH		 505 kvm->arch.user_sigp = 1;
506 r = 0;
507 break;
68c55750 508 case KVM_CAP_S390_VECTOR_REGISTERS:
5967c17b 509 mutex_lock(&kvm->lock);
a03825bb 510 if (kvm->created_vcpus) {
5967c17b
DH		 511 r = -EBUSY;
512 } else if (MACHINE_HAS_VX) {
c54f0d6a
DH		 513 set_kvm_facility(kvm->arch.model.fac_mask, 129);
514 set_kvm_facility(kvm->arch.model.fac_list, 129);
2f87d942
GH		 515 if (test_facility(134)) {
516 set_kvm_facility(kvm->arch.model.fac_mask, 134);
517 set_kvm_facility(kvm->arch.model.fac_list, 134);
518 }
53743aa7
MS		 519 if (test_facility(135)) {
520 set_kvm_facility(kvm->arch.model.fac_mask, 135);
521 set_kvm_facility(kvm->arch.model.fac_list, 135);
522 }
18280d8b
MM		 523 r = 0;
524 } else
525 r = -EINVAL;
5967c17b 526 mutex_unlock(&kvm->lock);
c92ea7b9
CB		 527 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
528 r ? "(not available)" : "(success)");
68c55750 529 break;
c6e5f166
FZ		 530 case KVM_CAP_S390_RI:
531 r = -EINVAL;
532 mutex_lock(&kvm->lock);
a03825bb 533 if (kvm->created_vcpus) {
c6e5f166
FZ		 534 r = -EBUSY;
535 } else if (test_facility(64)) {
c54f0d6a
DH		 536 set_kvm_facility(kvm->arch.model.fac_mask, 64);
537 set_kvm_facility(kvm->arch.model.fac_list, 64);
c6e5f166
FZ		 538 r = 0;
539 }
540 mutex_unlock(&kvm->lock);
541 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
542 r ? "(not available)" : "(success)");
543 break;
e44fc8c9 544 case KVM_CAP_S390_USER_STSI:
c92ea7b9 545 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
e44fc8c9
ET		 546 kvm->arch.user_stsi = 1;
547 r = 0;
548 break;
6502a34c
DH		 549 case KVM_CAP_S390_USER_INSTR0:
550 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0");
551 kvm->arch.user_instr0 = 1;
552 icpt_operexc_on_all_vcpus(kvm);
553 r = 0;
554 break;
d938dc55
CH		 555 default:
556 r = -EINVAL;
557 break;
558 }
559 return r;
560}
561
8c0a7ce6
DD		 562static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
563{
564 int ret;
565
566 switch (attr->attr) {
567 case KVM_S390_VM_MEM_LIMIT_SIZE:
568 ret = 0;
c92ea7b9 569 VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
a3a92c31
DD		 570 kvm->arch.mem_limit);
571 if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
8c0a7ce6
DD		 572 ret = -EFAULT;
573 break;
574 default:
575 ret = -ENXIO;
576 break;
577 }
578 return ret;
579}
580
581static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
4f718eab
DD		 582{
583 int ret;
584 unsigned int idx;
585 switch (attr->attr) {
586 case KVM_S390_VM_MEM_ENABLE_CMMA:
f9cbd9b0 587 ret = -ENXIO;
c24cc9c8 588 if (!sclp.has_cmma)
e6db1d61
DD		 589 break;
590
4f718eab 591 ret = -EBUSY;
c92ea7b9 592 VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
4f718eab 593 mutex_lock(&kvm->lock);
a03825bb 594 if (!kvm->created_vcpus) {
4f718eab
DD		 595 kvm->arch.use_cmma = 1;
596 ret = 0;
597 }
598 mutex_unlock(&kvm->lock);
599 break;
600 case KVM_S390_VM_MEM_CLR_CMMA:
f9cbd9b0
DH		 601 ret = -ENXIO;
602 if (!sclp.has_cmma)
603 break;
c3489155
DD		 604 ret = -EINVAL;
605 if (!kvm->arch.use_cmma)
606 break;
607
c92ea7b9 608 VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
4f718eab
DD		 609 mutex_lock(&kvm->lock);
610 idx = srcu_read_lock(&kvm->srcu);
a13cff31 611 s390_reset_cmma(kvm->arch.gmap->mm);
4f718eab
DD		 612 srcu_read_unlock(&kvm->srcu, idx);
613 mutex_unlock(&kvm->lock);
614 ret = 0;
615 break;
8c0a7ce6
DD		 616 case KVM_S390_VM_MEM_LIMIT_SIZE: {
617 unsigned long new_limit;
618
619 if (kvm_is_ucontrol(kvm))
620 return -EINVAL;
621
622 if (get_user(new_limit, (u64 __user *)attr->addr))
623 return -EFAULT;
624
a3a92c31
DD		 625 if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
626 new_limit > kvm->arch.mem_limit)
8c0a7ce6
DD		 627 return -E2BIG;
628
a3a92c31
DD		 629 if (!new_limit)
630 return -EINVAL;
631
6ea427bb 632 /* gmap_create takes last usable address */
a3a92c31
DD		 633 if (new_limit != KVM_S390_NO_MEM_LIMIT)
634 new_limit -= 1;
635
8c0a7ce6
DD		 636 ret = -EBUSY;
637 mutex_lock(&kvm->lock);
a03825bb 638 if (!kvm->created_vcpus) {
6ea427bb
MS		 639 /* gmap_create will round the limit up */
640 struct gmap *new = gmap_create(current->mm, new_limit);
8c0a7ce6
DD		 641
642 if (!new) {
643 ret = -ENOMEM;
644 } else {
6ea427bb 645 gmap_remove(kvm->arch.gmap);
8c0a7ce6
DD		 646 new->private = kvm;
647 kvm->arch.gmap = new;
648 ret = 0;
649 }
650 }
651 mutex_unlock(&kvm->lock);
a3a92c31
DD		 652 VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit);
653 VM_EVENT(kvm, 3, "New guest asce: 0x%pK",
654 (void *) kvm->arch.gmap->asce);
8c0a7ce6
DD		 655 break;
656 }
4f718eab
DD		 657 default:
658 ret = -ENXIO;
659 break;
660 }
661 return ret;
662}
663
a374e892
TK		 664static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);
665
666static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
667{
668 struct kvm_vcpu *vcpu;
669 int i;
670
9d8d5786 671 if (!test_kvm_facility(kvm, 76))
a374e892
TK		 672 return -EINVAL;
673
674 mutex_lock(&kvm->lock);
675 switch (attr->attr) {
676 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
677 get_random_bytes(
678 kvm->arch.crypto.crycb->aes_wrapping_key_mask,
679 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
680 kvm->arch.crypto.aes_kw = 1;
c92ea7b9 681 VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
a374e892
TK		 682 break;
683 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
684 get_random_bytes(
685 kvm->arch.crypto.crycb->dea_wrapping_key_mask,
686 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
687 kvm->arch.crypto.dea_kw = 1;
c92ea7b9 688 VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
a374e892
TK		 689 break;
690 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
691 kvm->arch.crypto.aes_kw = 0;
692 memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0,
693 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
c92ea7b9 694 VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
a374e892
TK		 695 break;
696 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
697 kvm->arch.crypto.dea_kw = 0;
698 memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0,
699 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
c92ea7b9 700 VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
a374e892
TK		 701 break;
702 default:
703 mutex_unlock(&kvm->lock);
704 return -ENXIO;
705 }
706
707 kvm_for_each_vcpu(i, vcpu, kvm) {
708 kvm_s390_vcpu_crypto_setup(vcpu);
709 exit_sie(vcpu);
710 }
711 mutex_unlock(&kvm->lock);
712 return 0;
713}
714
72f25020
JH		 715static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
716{
717 u8 gtod_high;
718
719 if (copy_from_user(&gtod_high, (void __user *)attr->addr,
720 sizeof(gtod_high)))
721 return -EFAULT;
722
723 if (gtod_high != 0)
724 return -EINVAL;
58c383c6 725 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
72f25020
JH		 726
727 return 0;
728}
729
730static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
731{
5a3d883a 732 u64 gtod;
72f25020
JH		 733
734 if (copy_from_user(&gtod, (void __user *)attr->addr, sizeof(gtod)))
735 return -EFAULT;
736
25ed1675 737 kvm_s390_set_tod_clock(kvm, gtod);
58c383c6 738 VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod);
72f25020
JH		 739 return 0;
740}
741
742static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
743{
744 int ret;
745
746 if (attr->flags)
747 return -EINVAL;
748
749 switch (attr->attr) {
750 case KVM_S390_VM_TOD_HIGH:
751 ret = kvm_s390_set_tod_high(kvm, attr);
752 break;
753 case KVM_S390_VM_TOD_LOW:
754 ret = kvm_s390_set_tod_low(kvm, attr);
755 break;
756 default:
757 ret = -ENXIO;
758 break;
759 }
760 return ret;
761}
762
763static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
764{
765 u8 gtod_high = 0;
766
767 if (copy_to_user((void __user *)attr->addr, &gtod_high,
768 sizeof(gtod_high)))
769 return -EFAULT;
58c383c6 770 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
72f25020
JH		 771
772 return 0;
773}
774
775static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
776{
5a3d883a 777 u64 gtod;
72f25020 778
60417fcc 779 gtod = kvm_s390_get_tod_clock_fast(kvm);
72f25020
JH		 780 if (copy_to_user((void __user *)attr->addr, &gtod, sizeof(gtod)))
781 return -EFAULT;
58c383c6 782 VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
72f25020
JH		 783
784 return 0;
785}
786
787static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
788{
789 int ret;
790
791 if (attr->flags)
792 return -EINVAL;
793
794 switch (attr->attr) {
795 case KVM_S390_VM_TOD_HIGH:
796 ret = kvm_s390_get_tod_high(kvm, attr);
797 break;
798 case KVM_S390_VM_TOD_LOW:
799 ret = kvm_s390_get_tod_low(kvm, attr);
800 break;
801 default:
802 ret = -ENXIO;
803 break;
804 }
805 return ret;
806}
807
658b6eda
MM		 808static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
809{
810 struct kvm_s390_vm_cpu_processor *proc;
053dd230 811 u16 lowest_ibc, unblocked_ibc;
658b6eda
MM		 812 int ret = 0;
813
814 mutex_lock(&kvm->lock);
a03825bb 815 if (kvm->created_vcpus) {
658b6eda
MM		 816 ret = -EBUSY;
817 goto out;
818 }
819 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
820 if (!proc) {
821 ret = -ENOMEM;
822 goto out;
823 }
824 if (!copy_from_user(proc, (void __user *)attr->addr,
825 sizeof(*proc))) {
9bb0ec09 826 kvm->arch.model.cpuid = proc->cpuid;
053dd230
DH		 827 lowest_ibc = sclp.ibc >> 16 & 0xfff;
828 unblocked_ibc = sclp.ibc & 0xfff;
0487c44d 829 if (lowest_ibc && proc->ibc) {
053dd230
DH		 830 if (proc->ibc > unblocked_ibc)
831 kvm->arch.model.ibc = unblocked_ibc;
832 else if (proc->ibc < lowest_ibc)
833 kvm->arch.model.ibc = lowest_ibc;
834 else
835 kvm->arch.model.ibc = proc->ibc;
836 }
c54f0d6a 837 memcpy(kvm->arch.model.fac_list, proc->fac_list,
658b6eda 838 S390_ARCH_FAC_LIST_SIZE_BYTE);
a8c39dd7
CB		 839 VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
840 kvm->arch.model.ibc,
841 kvm->arch.model.cpuid);
842 VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
843 kvm->arch.model.fac_list[0],
844 kvm->arch.model.fac_list[1],
845 kvm->arch.model.fac_list[2]);
658b6eda
MM		 846 } else
847 ret = -EFAULT;
848 kfree(proc);
849out:
850 mutex_unlock(&kvm->lock);
851 return ret;
852}
853
15c9705f
DH		 854static int kvm_s390_set_processor_feat(struct kvm *kvm,
855 struct kvm_device_attr *attr)
856{
857 struct kvm_s390_vm_cpu_feat data;
858 int ret = -EBUSY;
859
860 if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
861 return -EFAULT;
862 if (!bitmap_subset((unsigned long *) data.feat,
863 kvm_s390_available_cpu_feat,
864 KVM_S390_VM_CPU_FEAT_NR_BITS))
865 return -EINVAL;
866
867 mutex_lock(&kvm->lock);
868 if (!atomic_read(&kvm->online_vcpus)) {
869 bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
870 KVM_S390_VM_CPU_FEAT_NR_BITS);
871 ret = 0;
872 }
873 mutex_unlock(&kvm->lock);
874 return ret;
875}
876
0a763c78
DH		 877static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
878 struct kvm_device_attr *attr)
879{
880 /*
881 * Once supported by kernel + hw, we have to store the subfunctions
882 * in kvm->arch and remember that user space configured them.
883 */
884 return -ENXIO;
885}
886
658b6eda
MM		 887static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
888{
889 int ret = -ENXIO;
890
891 switch (attr->attr) {
892 case KVM_S390_VM_CPU_PROCESSOR:
893 ret = kvm_s390_set_processor(kvm, attr);
894 break;
15c9705f
DH		 895 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
896 ret = kvm_s390_set_processor_feat(kvm, attr);
897 break;
0a763c78
DH		 898 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
899 ret = kvm_s390_set_processor_subfunc(kvm, attr);
900 break;
658b6eda
MM		 901 }
902 return ret;
903}
904
905static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
906{
907 struct kvm_s390_vm_cpu_processor *proc;
908 int ret = 0;
909
910 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
911 if (!proc) {
912 ret = -ENOMEM;
913 goto out;
914 }
9bb0ec09 915 proc->cpuid = kvm->arch.model.cpuid;
658b6eda 916 proc->ibc = kvm->arch.model.ibc;
c54f0d6a
DH		 917 memcpy(&proc->fac_list, kvm->arch.model.fac_list,
918 S390_ARCH_FAC_LIST_SIZE_BYTE);
a8c39dd7
CB		 919 VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
920 kvm->arch.model.ibc,
921 kvm->arch.model.cpuid);
922 VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
923 kvm->arch.model.fac_list[0],
924 kvm->arch.model.fac_list[1],
925 kvm->arch.model.fac_list[2]);
658b6eda
MM		 926 if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
927 ret = -EFAULT;
928 kfree(proc);
929out:
930 return ret;
931}
932
933static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
934{
935 struct kvm_s390_vm_cpu_machine *mach;
936 int ret = 0;
937
938 mach = kzalloc(sizeof(*mach), GFP_KERNEL);
939 if (!mach) {
940 ret = -ENOMEM;
941 goto out;
942 }
943 get_cpu_id((struct cpuid *) &mach->cpuid);
37c5f6c8 944 mach->ibc = sclp.ibc;
c54f0d6a 945 memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
981467c9 946 S390_ARCH_FAC_LIST_SIZE_BYTE);
658b6eda 947 memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
04478197 948 sizeof(S390_lowcore.stfle_fac_list));
a8c39dd7
CB		 949 VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx",
950 kvm->arch.model.ibc,
951 kvm->arch.model.cpuid);
952 VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx",
953 mach->fac_mask[0],
954 mach->fac_mask[1],
955 mach->fac_mask[2]);
956 VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx",
957 mach->fac_list[0],
958 mach->fac_list[1],
959 mach->fac_list[2]);
658b6eda
MM		 960 if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
961 ret = -EFAULT;
962 kfree(mach);
963out:
964 return ret;
965}
966
15c9705f
DH		 967static int kvm_s390_get_processor_feat(struct kvm *kvm,
968 struct kvm_device_attr *attr)
969{
970 struct kvm_s390_vm_cpu_feat data;
971
972 bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat,
973 KVM_S390_VM_CPU_FEAT_NR_BITS);
974 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
975 return -EFAULT;
976 return 0;
977}
978
979static int kvm_s390_get_machine_feat(struct kvm *kvm,
980 struct kvm_device_attr *attr)
981{
982 struct kvm_s390_vm_cpu_feat data;
983
984 bitmap_copy((unsigned long *) data.feat,
985 kvm_s390_available_cpu_feat,
986 KVM_S390_VM_CPU_FEAT_NR_BITS);
987 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
988 return -EFAULT;
989 return 0;
990}
991
0a763c78
DH		 992static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
993 struct kvm_device_attr *attr)
994{
995 /*
996 * Once we can actually configure subfunctions (kernel + hw support),
997 * we have to check if they were already set by user space, if so copy
998 * them from kvm->arch.
999 */
1000 return -ENXIO;
1001}
1002
1003static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
1004 struct kvm_device_attr *attr)
1005{
1006 if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
1007 sizeof(struct kvm_s390_vm_cpu_subfunc)))
1008 return -EFAULT;
1009 return 0;
1010}
658b6eda
MM		 1011static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1012{
1013 int ret = -ENXIO;
1014
1015 switch (attr->attr) {
1016 case KVM_S390_VM_CPU_PROCESSOR:
1017 ret = kvm_s390_get_processor(kvm, attr);
1018 break;
1019 case KVM_S390_VM_CPU_MACHINE:
1020 ret = kvm_s390_get_machine(kvm, attr);
1021 break;
15c9705f
DH		 1022 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1023 ret = kvm_s390_get_processor_feat(kvm, attr);
1024 break;
1025 case KVM_S390_VM_CPU_MACHINE_FEAT:
1026 ret = kvm_s390_get_machine_feat(kvm, attr);
1027 break;
0a763c78
DH		 1028 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1029 ret = kvm_s390_get_processor_subfunc(kvm, attr);
1030 break;
1031 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
1032 ret = kvm_s390_get_machine_subfunc(kvm, attr);
1033 break;
658b6eda
MM		 1034 }
1035 return ret;
1036}
1037
f2061656
DD		 1038static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1039{
1040 int ret;
1041
1042 switch (attr->group) {
4f718eab 1043 case KVM_S390_VM_MEM_CTRL:
8c0a7ce6 1044 ret = kvm_s390_set_mem_control(kvm, attr);
4f718eab 1045 break;
72f25020
JH		 1046 case KVM_S390_VM_TOD:
1047 ret = kvm_s390_set_tod(kvm, attr);
1048 break;
658b6eda
MM		 1049 case KVM_S390_VM_CPU_MODEL:
1050 ret = kvm_s390_set_cpu_model(kvm, attr);
1051 break;
a374e892
TK		 1052 case KVM_S390_VM_CRYPTO:
1053 ret = kvm_s390_vm_set_crypto(kvm, attr);
1054 break;
f2061656
DD		 1055 default:
1056 ret = -ENXIO;
1057 break;
1058 }
1059
1060 return ret;
1061}
1062
1063static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1064{
8c0a7ce6
DD		 1065 int ret;
1066
1067 switch (attr->group) {
1068 case KVM_S390_VM_MEM_CTRL:
1069 ret = kvm_s390_get_mem_control(kvm, attr);
1070 break;
72f25020
JH		 1071 case KVM_S390_VM_TOD:
1072 ret = kvm_s390_get_tod(kvm, attr);
1073 break;
658b6eda
MM		 1074 case KVM_S390_VM_CPU_MODEL:
1075 ret = kvm_s390_get_cpu_model(kvm, attr);
1076 break;
8c0a7ce6
DD		 1077 default:
1078 ret = -ENXIO;
1079 break;
1080 }
1081
1082 return ret;
f2061656
DD		 1083}
1084
1085static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1086{
1087 int ret;
1088
1089 switch (attr->group) {
4f718eab
DD		 1090 case KVM_S390_VM_MEM_CTRL:
1091 switch (attr->attr) {
1092 case KVM_S390_VM_MEM_ENABLE_CMMA:
1093 case KVM_S390_VM_MEM_CLR_CMMA:
f9cbd9b0
DH		 1094 ret = sclp.has_cmma ? 0 : -ENXIO;
1095 break;
8c0a7ce6 1096 case KVM_S390_VM_MEM_LIMIT_SIZE:
4f718eab
DD		 1097 ret = 0;
1098 break;
1099 default:
1100 ret = -ENXIO;
1101 break;
1102 }
1103 break;
72f25020
JH		 1104 case KVM_S390_VM_TOD:
1105 switch (attr->attr) {
1106 case KVM_S390_VM_TOD_LOW:
1107 case KVM_S390_VM_TOD_HIGH:
1108 ret = 0;
1109 break;
1110 default:
1111 ret = -ENXIO;
1112 break;
1113 }
1114 break;
658b6eda
MM		 1115 case KVM_S390_VM_CPU_MODEL:
1116 switch (attr->attr) {
1117 case KVM_S390_VM_CPU_PROCESSOR:
1118 case KVM_S390_VM_CPU_MACHINE:
15c9705f
DH		 1119 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1120 case KVM_S390_VM_CPU_MACHINE_FEAT:
0a763c78 1121 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
658b6eda
MM		 1122 ret = 0;
1123 break;
0a763c78
DH		 1124 /* configuring subfunctions is not supported yet */
1125 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
658b6eda
MM		 1126 default:
1127 ret = -ENXIO;
1128 break;
1129 }
1130 break;
a374e892
TK		 1131 case KVM_S390_VM_CRYPTO:
1132 switch (attr->attr) {
1133 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
1134 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
1135 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
1136 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
1137 ret = 0;
1138 break;
1139 default:
1140 ret = -ENXIO;
1141 break;
1142 }
1143 break;
f2061656
DD		 1144 default:
1145 ret = -ENXIO;
1146 break;
1147 }
1148
1149 return ret;
1150}
1151
30ee2a98
JH		 1152static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1153{
1154 uint8_t *keys;
1155 uint64_t hva;
30ee2a98
JH		 1156 int i, r = 0;
1157
1158 if (args->flags != 0)
1159 return -EINVAL;
1160
1161 /* Is this guest using storage keys? */
1162 if (!mm_use_skey(current->mm))
1163 return KVM_S390_GET_SKEYS_NONE;
1164
1165 /* Enforce sane limit on memory allocation */
1166 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1167 return -EINVAL;
1168
1169 keys = kmalloc_array(args->count, sizeof(uint8_t),
1170 GFP_KERNEL | __GFP_NOWARN);
1171 if (!keys)
1172 keys = vmalloc(sizeof(uint8_t) * args->count);
1173 if (!keys)
1174 return -ENOMEM;
1175
d3ed1cee 1176 down_read(&current->mm->mmap_sem);
30ee2a98
JH		 1177 for (i = 0; i < args->count; i++) {
1178 hva = gfn_to_hva(kvm, args->start_gfn + i);
1179 if (kvm_is_error_hva(hva)) {
1180 r = -EFAULT;
d3ed1cee 1181 break;
30ee2a98
JH		 1182 }
1183
154c8c19
DH		 1184 r = get_guest_storage_key(current->mm, hva, &keys[i]);
1185 if (r)
d3ed1cee 1186 break;
30ee2a98 1187 }
d3ed1cee
MS		 1188 up_read(&current->mm->mmap_sem);
1189
1190 if (!r) {
1191 r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
1192 sizeof(uint8_t) * args->count);
1193 if (r)
1194 r = -EFAULT;
30ee2a98
JH		 1195 }
1196
30ee2a98
JH		 1197 kvfree(keys);
1198 return r;
1199}
1200
1201static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1202{
1203 uint8_t *keys;
1204 uint64_t hva;
1205 int i, r = 0;
1206
1207 if (args->flags != 0)
1208 return -EINVAL;
1209
1210 /* Enforce sane limit on memory allocation */
1211 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1212 return -EINVAL;
1213
1214 keys = kmalloc_array(args->count, sizeof(uint8_t),
1215 GFP_KERNEL | __GFP_NOWARN);
1216 if (!keys)
1217 keys = vmalloc(sizeof(uint8_t) * args->count);
1218 if (!keys)
1219 return -ENOMEM;
1220
1221 r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
1222 sizeof(uint8_t) * args->count);
1223 if (r) {
1224 r = -EFAULT;
1225 goto out;
1226 }
1227
1228 /* Enable storage key handling for the guest */
14d4a425
DD		 1229 r = s390_enable_skey();
1230 if (r)
1231 goto out;
30ee2a98 1232
d3ed1cee 1233 down_read(&current->mm->mmap_sem);
30ee2a98
JH		 1234 for (i = 0; i < args->count; i++) {
1235 hva = gfn_to_hva(kvm, args->start_gfn + i);
1236 if (kvm_is_error_hva(hva)) {
1237 r = -EFAULT;
d3ed1cee 1238 break;
30ee2a98
JH		 1239 }
1240
1241 /* Lowest order bit is reserved */
1242 if (keys[i] & 0x01) {
1243 r = -EINVAL;
d3ed1cee 1244 break;
30ee2a98
JH		 1245 }
1246
fe69eabf 1247 r = set_guest_storage_key(current->mm, hva, keys[i], 0);
30ee2a98 1248 if (r)
d3ed1cee 1249 break;
30ee2a98 1250 }
d3ed1cee 1251 up_read(&current->mm->mmap_sem);
30ee2a98
JH		 1252out:
1253 kvfree(keys);
1254 return r;
1255}
1256
b0c632db
HC		 1257long kvm_arch_vm_ioctl(struct file *filp,
1258 unsigned int ioctl, unsigned long arg)
1259{
1260 struct kvm *kvm = filp->private_data;
1261 void __user *argp = (void __user *)arg;
f2061656 1262 struct kvm_device_attr attr;
b0c632db
HC		 1263 int r;
1264
1265 switch (ioctl) {
ba5c1e9b
CO		 1266 case KVM_S390_INTERRUPT: {
1267 struct kvm_s390_interrupt s390int;
1268
1269 r = -EFAULT;
1270 if (copy_from_user(&s390int, argp, sizeof(s390int)))
1271 break;
1272 r = kvm_s390_inject_vm(kvm, &s390int);
1273 break;
1274 }
d938dc55
CH		 1275 case KVM_ENABLE_CAP: {
1276 struct kvm_enable_cap cap;
1277 r = -EFAULT;
1278 if (copy_from_user(&cap, argp, sizeof(cap)))
1279 break;
1280 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1281 break;
1282 }
84223598
CH		 1283 case KVM_CREATE_IRQCHIP: {
1284 struct kvm_irq_routing_entry routing;
1285
1286 r = -EINVAL;
1287 if (kvm->arch.use_irqchip) {
1288 /* Set up dummy routing. */
1289 memset(&routing, 0, sizeof(routing));
152b2839 1290 r = kvm_set_irq_routing(kvm, &routing, 0, 0);
84223598
CH		 1291 }
1292 break;
1293 }
f2061656
DD		 1294 case KVM_SET_DEVICE_ATTR: {
1295 r = -EFAULT;
1296 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
1297 break;
1298 r = kvm_s390_vm_set_attr(kvm, &attr);
1299 break;
1300 }
1301 case KVM_GET_DEVICE_ATTR: {
1302 r = -EFAULT;
1303 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
1304 break;
1305 r = kvm_s390_vm_get_attr(kvm, &attr);
1306 break;
1307 }
1308 case KVM_HAS_DEVICE_ATTR: {
1309 r = -EFAULT;
1310 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
1311 break;
1312 r = kvm_s390_vm_has_attr(kvm, &attr);
1313 break;
1314 }
30ee2a98
JH		 1315 case KVM_S390_GET_SKEYS: {
1316 struct kvm_s390_skeys args;
1317
1318 r = -EFAULT;
1319 if (copy_from_user(&args, argp,
1320 sizeof(struct kvm_s390_skeys)))
1321 break;
1322 r = kvm_s390_get_skeys(kvm, &args);
1323 break;
1324 }
1325 case KVM_S390_SET_SKEYS: {
1326 struct kvm_s390_skeys args;
1327
1328 r = -EFAULT;
1329 if (copy_from_user(&args, argp,
1330 sizeof(struct kvm_s390_skeys)))
1331 break;
1332 r = kvm_s390_set_skeys(kvm, &args);
1333 break;
1334 }
b0c632db 1335 default:
367e1319 1336 r = -ENOTTY;
b0c632db
HC		 1337 }
1338
1339 return r;
1340}
1341
45c9b47c
TK		 1342static int kvm_s390_query_ap_config(u8 *config)
1343{
1344 u32 fcn_code = 0x04000000UL;
86044c8c 1345 u32 cc = 0;
45c9b47c 1346
86044c8c 1347 memset(config, 0, 128);
45c9b47c
TK		 1348 asm volatile(
1349 "lgr 0,%1\n"
1350 "lgr 2,%2\n"
1351 ".long 0xb2af0000\n" /* PQAP(QCI) */
86044c8c 1352 "0: ipm %0\n"
45c9b47c 1353 "srl %0,28\n"
86044c8c
CB		 1354 "1:\n"
1355 EX_TABLE(0b, 1b)
1356 : "+r" (cc)
45c9b47c
TK		 1357 : "r" (fcn_code), "r" (config)
1358 : "cc", "0", "2", "memory"
1359 );
1360
1361 return cc;
1362}
1363
1364static int kvm_s390_apxa_installed(void)
1365{
1366 u8 config[128];
1367 int cc;
1368
a6aacc3f 1369 if (test_facility(12)) {
45c9b47c
TK		 1370 cc = kvm_s390_query_ap_config(config);
1371
1372 if (cc)
1373 pr_err("PQAP(QCI) failed with cc=%d", cc);
1374 else
1375 return config[0] & 0x40;
1376 }
1377
1378 return 0;
1379}
1380
1381static void kvm_s390_set_crycb_format(struct kvm *kvm)
1382{
1383 kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
1384
1385 if (kvm_s390_apxa_installed())
1386 kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
1387 else
1388 kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
1389}
1390
9bb0ec09 1391static u64 kvm_s390_get_initial_cpuid(void)
9d8d5786 1392{
9bb0ec09
DH		 1393 struct cpuid cpuid;
1394
1395 get_cpu_id(&cpuid);
1396 cpuid.version = 0xff;
1397 return *((u64 *) &cpuid);
9d8d5786
MM		 1398}
1399
c54f0d6a 1400static void kvm_s390_crypto_init(struct kvm *kvm)
5102ee87 1401{
9d8d5786 1402 if (!test_kvm_facility(kvm, 76))
c54f0d6a 1403 return;
5102ee87 1404
c54f0d6a 1405 kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
45c9b47c 1406 kvm_s390_set_crycb_format(kvm);
5102ee87 1407
ed6f76b4
TK		 1408 /* Enable AES/DEA protected key functions by default */
1409 kvm->arch.crypto.aes_kw = 1;
1410 kvm->arch.crypto.dea_kw = 1;
1411 get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
1412 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
1413 get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
1414 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
5102ee87
TK		 1415}
1416
7d43bafc
ED		 1417static void sca_dispose(struct kvm *kvm)
1418{
1419 if (kvm->arch.use_esca)
5e044315 1420 free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
7d43bafc
ED		 1421 else
1422 free_page((unsigned long)(kvm->arch.sca));
1423 kvm->arch.sca = NULL;
1424}
1425
e08b9637 1426int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
b0c632db 1427{
76a6dd72 1428 gfp_t alloc_flags = GFP_KERNEL;
9d8d5786 1429 int i, rc;
b0c632db 1430 char debug_name[16];
f6c137ff 1431 static unsigned long sca_offset;
b0c632db 1432
e08b9637
CO		 1433 rc = -EINVAL;
1434#ifdef CONFIG_KVM_S390_UCONTROL
1435 if (type & ~KVM_VM_S390_UCONTROL)
1436 goto out_err;
1437 if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
1438 goto out_err;
1439#else
1440 if (type)
1441 goto out_err;
1442#endif
1443
b0c632db
HC		 1444 rc = s390_enable_sie();
1445 if (rc)
d89f5eff 1446 goto out_err;
b0c632db 1447
b290411a
CO		 1448 rc = -ENOMEM;
1449
7d0a5e62
JF		 1450 ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500);
1451
7d43bafc 1452 kvm->arch.use_esca = 0; /* start with basic SCA */
76a6dd72
DH		 1453 if (!sclp.has_64bscao)
1454 alloc_flags |= GFP_DMA;
5e044315 1455 rwlock_init(&kvm->arch.sca_lock);
76a6dd72 1456 kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
b0c632db 1457 if (!kvm->arch.sca)
d89f5eff 1458 goto out_err;
f6c137ff 1459 spin_lock(&kvm_lock);
c5c2c393 1460 sca_offset += 16;
bc784cce 1461 if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
c5c2c393 1462 sca_offset = 0;
bc784cce
ED		 1463 kvm->arch.sca = (struct bsca_block *)
1464 ((char *) kvm->arch.sca + sca_offset);
f6c137ff 1465 spin_unlock(&kvm_lock);
b0c632db
HC		 1466
1467 sprintf(debug_name, "kvm-%u", current->pid);
1468
1cb9cf72 1469 kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
b0c632db 1470 if (!kvm->arch.dbf)
40f5b735 1471 goto out_err;
b0c632db 1472
c54f0d6a
DH		 1473 kvm->arch.sie_page2 =
1474 (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
1475 if (!kvm->arch.sie_page2)
40f5b735 1476 goto out_err;
9d8d5786 1477
fb5bf93f 1478 /* Populate the facility mask initially. */
c54f0d6a 1479 memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list,
04478197 1480 sizeof(S390_lowcore.stfle_fac_list));
9d8d5786
MM		 1481 for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) {
1482 if (i < kvm_s390_fac_list_mask_size())
c54f0d6a 1483 kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i];
9d8d5786 1484 else
c54f0d6a 1485 kvm->arch.model.fac_mask[i] = 0UL;
9d8d5786
MM		 1486 }
1487
981467c9 1488 /* Populate the facility list initially. */
c54f0d6a
DH		 1489 kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
1490 memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask,
981467c9
MM		 1491 S390_ARCH_FAC_LIST_SIZE_BYTE);
1492
95ca2cb5
JF		 1493 set_kvm_facility(kvm->arch.model.fac_mask, 74);
1494 set_kvm_facility(kvm->arch.model.fac_list, 74);
1495
9bb0ec09 1496 kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
37c5f6c8 1497 kvm->arch.model.ibc = sclp.ibc & 0x0fff;
9d8d5786 1498
c54f0d6a 1499 kvm_s390_crypto_init(kvm);
5102ee87 1500
ba5c1e9b 1501 spin_lock_init(&kvm->arch.float_int.lock);
6d3da241
JF		 1502 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1503 INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
8a242234 1504 init_waitqueue_head(&kvm->arch.ipte_wq);
a6b7e459 1505 mutex_init(&kvm->arch.ipte_mutex);
ba5c1e9b 1506
b0c632db 1507 debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
78f26131 1508 VM_EVENT(kvm, 3, "vm created with type %lu", type);
b0c632db 1509
e08b9637
CO		 1510 if (type & KVM_VM_S390_UCONTROL) {
1511 kvm->arch.gmap = NULL;
a3a92c31 1512 kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
e08b9637 1513 } else {
32e6b236
GH		 1514 if (sclp.hamax == U64_MAX)
1515 kvm->arch.mem_limit = TASK_MAX_SIZE;
1516 else
1517 kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE,
1518 sclp.hamax + 1);
6ea427bb 1519 kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
e08b9637 1520 if (!kvm->arch.gmap)
40f5b735 1521 goto out_err;
2c70fe44 1522 kvm->arch.gmap->private = kvm;
24eb3a82 1523 kvm->arch.gmap->pfault_enabled = 0;
e08b9637 1524 }
fa6b7fe9
CH		 1525
1526 kvm->arch.css_support = 0;
84223598 1527 kvm->arch.use_irqchip = 0;
72f25020 1528 kvm->arch.epoch = 0;
fa6b7fe9 1529
8ad35755 1530 spin_lock_init(&kvm->arch.start_stop_lock);
a3508fbe 1531 kvm_s390_vsie_init(kvm);
8335713a 1532 KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
8ad35755 1533
d89f5eff 1534 return 0;
40f5b735 1535out_err:
c54f0d6a 1536 free_page((unsigned long)kvm->arch.sie_page2);
598841ca 1537 debug_unregister(kvm->arch.dbf);
7d43bafc 1538 sca_dispose(kvm);
78f26131 1539 KVM_EVENT(3, "creation of vm failed: %d", rc);
d89f5eff 1540 return rc;
b0c632db
HC		 1541}
1542
235539b4
LC		 1543bool kvm_arch_has_vcpu_debugfs(void)
1544{
1545 return false;
1546}
1547
1548int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
1549{
1550 return 0;
1551}
1552
d329c035
CB		 1553void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1554{
1555 VCPU_EVENT(vcpu, 3, "%s", "free cpu");
ade38c31 1556 trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
67335e63 1557 kvm_s390_clear_local_irqs(vcpu);
3c038e6b 1558 kvm_clear_async_pf_completion_queue(vcpu);
bc784cce 1559 if (!kvm_is_ucontrol(vcpu->kvm))
a6e2f683 1560 sca_del_vcpu(vcpu);
27e0393f
CO		 1561
1562 if (kvm_is_ucontrol(vcpu->kvm))
6ea427bb 1563 gmap_remove(vcpu->arch.gmap);
27e0393f 1564
e6db1d61 1565 if (vcpu->kvm->arch.use_cmma)
b31605c1 1566 kvm_s390_vcpu_unsetup_cmma(vcpu);
d329c035 1567 free_page((unsigned long)(vcpu->arch.sie_block));
b31288fa 1568
6692cef3 1569 kvm_vcpu_uninit(vcpu);
b110feaf 1570 kmem_cache_free(kvm_vcpu_cache, vcpu);
d329c035
CB		 1571}
1572
1573static void kvm_free_vcpus(struct kvm *kvm)
1574{
1575 unsigned int i;
988a2cae 1576 struct kvm_vcpu *vcpu;
d329c035 1577
988a2cae
GN		 1578 kvm_for_each_vcpu(i, vcpu, kvm)
1579 kvm_arch_vcpu_destroy(vcpu);
1580
1581 mutex_lock(&kvm->lock);
1582 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
1583 kvm->vcpus[i] = NULL;
1584
1585 atomic_set(&kvm->online_vcpus, 0);
1586 mutex_unlock(&kvm->lock);
d329c035
CB		 1587}
1588
b0c632db
HC		 1589void kvm_arch_destroy_vm(struct kvm *kvm)
1590{
d329c035 1591 kvm_free_vcpus(kvm);
7d43bafc 1592 sca_dispose(kvm);
d329c035 1593 debug_unregister(kvm->arch.dbf);
c54f0d6a 1594 free_page((unsigned long)kvm->arch.sie_page2);
27e0393f 1595 if (!kvm_is_ucontrol(kvm))
6ea427bb 1596 gmap_remove(kvm->arch.gmap);
841b91c5 1597 kvm_s390_destroy_adapters(kvm);
67335e63 1598 kvm_s390_clear_float_irqs(kvm);
a3508fbe 1599 kvm_s390_vsie_destroy(kvm);
8335713a 1600 KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
b0c632db
HC		 1601}
1602
1603/* Section: vcpu related */
dafd032a
DD		 1604static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
1605{
6ea427bb 1606 vcpu->arch.gmap = gmap_create(current->mm, -1UL);
dafd032a
DD		 1607 if (!vcpu->arch.gmap)
1608 return -ENOMEM;
1609 vcpu->arch.gmap->private = vcpu->kvm;
1610
1611 return 0;
1612}
1613
a6e2f683
ED		 1614static void sca_del_vcpu(struct kvm_vcpu *vcpu)
1615{
a6940674
DH		 1616 if (!kvm_s390_use_sca_entries())
1617 return;
5e044315 1618 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 1619 if (vcpu->kvm->arch.use_esca) {
1620 struct esca_block *sca = vcpu->kvm->arch.sca;
a6e2f683 1621
7d43bafc 1622 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
10ce32d5 1623 sca->cpu[vcpu->vcpu_id].sda = 0;
7d43bafc
ED		 1624 } else {
1625 struct bsca_block *sca = vcpu->kvm->arch.sca;
1626
1627 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
10ce32d5 1628 sca->cpu[vcpu->vcpu_id].sda = 0;
7d43bafc 1629 }
5e044315 1630 read_unlock(&vcpu->kvm->arch.sca_lock);
a6e2f683
ED		 1631}
1632
eaa78f34 1633static void sca_add_vcpu(struct kvm_vcpu *vcpu)
a6e2f683 1634{
a6940674
DH		 1635 if (!kvm_s390_use_sca_entries()) {
1636 struct bsca_block *sca = vcpu->kvm->arch.sca;
1637
1638 /* we still need the basic sca for the ipte control */
1639 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
1640 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
1641 }
eaa78f34
DH		 1642 read_lock(&vcpu->kvm->arch.sca_lock);
1643 if (vcpu->kvm->arch.use_esca) {
1644 struct esca_block *sca = vcpu->kvm->arch.sca;
7d43bafc 1645
eaa78f34 1646 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
7d43bafc
ED		 1647 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
1648 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
25508824 1649 vcpu->arch.sie_block->ecb2 |= 0x04U;
eaa78f34 1650 set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
7d43bafc 1651 } else {
eaa78f34 1652 struct bsca_block *sca = vcpu->kvm->arch.sca;
a6e2f683 1653
eaa78f34 1654 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
7d43bafc
ED		 1655 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
1656 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
eaa78f34 1657 set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
7d43bafc 1658 }
eaa78f34 1659 read_unlock(&vcpu->kvm->arch.sca_lock);
5e044315
ED		 1660}
1661
1662/* Basic SCA to Extended SCA data copy routines */
1663static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
1664{
1665 d->sda = s->sda;
1666 d->sigp_ctrl.c = s->sigp_ctrl.c;
1667 d->sigp_ctrl.scn = s->sigp_ctrl.scn;
1668}
1669
1670static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
1671{
1672 int i;
1673
1674 d->ipte_control = s->ipte_control;
1675 d->mcn[0] = s->mcn;
1676 for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
1677 sca_copy_entry(&d->cpu[i], &s->cpu[i]);
1678}
1679
1680static int sca_switch_to_extended(struct kvm *kvm)
1681{
1682 struct bsca_block *old_sca = kvm->arch.sca;
1683 struct esca_block *new_sca;
1684 struct kvm_vcpu *vcpu;
1685 unsigned int vcpu_idx;
1686 u32 scaol, scaoh;
1687
1688 new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
1689 if (!new_sca)
1690 return -ENOMEM;
1691
1692 scaoh = (u32)((u64)(new_sca) >> 32);
1693 scaol = (u32)(u64)(new_sca) & ~0x3fU;
1694
1695 kvm_s390_vcpu_block_all(kvm);
1696 write_lock(&kvm->arch.sca_lock);
1697
1698 sca_copy_b_to_e(new_sca, old_sca);
1699
1700 kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
1701 vcpu->arch.sie_block->scaoh = scaoh;
1702 vcpu->arch.sie_block->scaol = scaol;
1703 vcpu->arch.sie_block->ecb2 |= 0x04U;
1704 }
1705 kvm->arch.sca = new_sca;
1706 kvm->arch.use_esca = 1;
1707
1708 write_unlock(&kvm->arch.sca_lock);
1709 kvm_s390_vcpu_unblock_all(kvm);
1710
1711 free_page((unsigned long)old_sca);
1712
8335713a
CB		 1713 VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
1714 old_sca, kvm->arch.sca);
5e044315 1715 return 0;
a6e2f683
ED		 1716}
1717
1718static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
1719{
5e044315
ED		 1720 int rc;
1721
a6940674
DH		 1722 if (!kvm_s390_use_sca_entries()) {
1723 if (id < KVM_MAX_VCPUS)
1724 return true;
1725 return false;
1726 }
5e044315
ED		 1727 if (id < KVM_S390_BSCA_CPU_SLOTS)
1728 return true;
76a6dd72 1729 if (!sclp.has_esca || !sclp.has_64bscao)
5e044315
ED		 1730 return false;
1731
1732 mutex_lock(&kvm->lock);
1733 rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
1734 mutex_unlock(&kvm->lock);
1735
1736 return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
a6e2f683
ED		 1737}
1738
b0c632db
HC		 1739int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1740{
3c038e6b
DD		 1741 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
1742 kvm_clear_async_pf_completion_queue(vcpu);
59674c1a
CB		 1743 vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
1744 KVM_SYNC_GPRS |
9eed0735 1745 KVM_SYNC_ACRS |
b028ee3e
DH		 1746 KVM_SYNC_CRS |
1747 KVM_SYNC_ARCH0 |
1748 KVM_SYNC_PFAULT;
75a4615c 1749 kvm_s390_set_prefix(vcpu, 0);
c6e5f166
FZ		 1750 if (test_kvm_facility(vcpu->kvm, 64))
1751 vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
f6aa6dc4
DH		 1752 /* fprs can be synchronized via vrs, even if the guest has no vx. With
1753 * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
1754 */
1755 if (MACHINE_HAS_VX)
68c55750 1756 vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
6fd8e67d
DH		 1757 else
1758 vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
dafd032a
DD		 1759
1760 if (kvm_is_ucontrol(vcpu->kvm))
1761 return __kvm_ucontrol_vcpu_init(vcpu);
1762
b0c632db
HC		 1763 return 0;
1764}
1765
db0758b2
DH		 1766/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
1767static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1768{
1769 WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
9c23a131 1770 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2 1771 vcpu->arch.cputm_start = get_tod_clock_fast();
9c23a131 1772 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 1773}
1774
1775/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
1776static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1777{
1778 WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
9c23a131 1779 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 1780 vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
1781 vcpu->arch.cputm_start = 0;
9c23a131 1782 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 1783}
1784
1785/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
1786static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1787{
1788 WARN_ON_ONCE(vcpu->arch.cputm_enabled);
1789 vcpu->arch.cputm_enabled = true;
1790 __start_cpu_timer_accounting(vcpu);
1791}
1792
1793/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
1794static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1795{
1796 WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
1797 __stop_cpu_timer_accounting(vcpu);
1798 vcpu->arch.cputm_enabled = false;
1799}
1800
1801static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1802{
1803 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
1804 __enable_cpu_timer_accounting(vcpu);
1805 preempt_enable();
1806}
1807
1808static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1809{
1810 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
1811 __disable_cpu_timer_accounting(vcpu);
1812 preempt_enable();
1813}
1814
4287f247
DH		 1815/* set the cpu timer - may only be called from the VCPU thread itself */
1816void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
1817{
db0758b2 1818 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
9c23a131 1819 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 1820 if (vcpu->arch.cputm_enabled)
1821 vcpu->arch.cputm_start = get_tod_clock_fast();
4287f247 1822 vcpu->arch.sie_block->cputm = cputm;
9c23a131 1823 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2 1824 preempt_enable();
4287f247
DH		 1825}
1826
db0758b2 1827/* update and get the cpu timer - can also be called from other VCPU threads */
4287f247
DH		 1828__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
1829{
9c23a131 1830 unsigned int seq;
db0758b2 1831 __u64 value;
db0758b2
DH		 1832
1833 if (unlikely(!vcpu->arch.cputm_enabled))
1834 return vcpu->arch.sie_block->cputm;
1835
9c23a131
DH		 1836 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
1837 do {
1838 seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
1839 /*
1840 * If the writer would ever execute a read in the critical
1841 * section, e.g. in irq context, we have a deadlock.
1842 */
1843 WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu);
1844 value = vcpu->arch.sie_block->cputm;
1845 /* if cputm_start is 0, accounting is being started/stopped */
1846 if (likely(vcpu->arch.cputm_start))
1847 value -= get_tod_clock_fast() - vcpu->arch.cputm_start;
1848 } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1));
1849 preempt_enable();
db0758b2 1850 return value;
4287f247
DH		 1851}
1852
b0c632db
HC		 1853void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1854{
9977e886 1855
37d9df98 1856 gmap_enable(vcpu->arch.enabled_gmap);
805de8f4 1857 atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
5ebda316 1858 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
db0758b2 1859 __start_cpu_timer_accounting(vcpu);
01a745ac 1860 vcpu->cpu = cpu;
b0c632db
HC		 1861}
1862
1863void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1864{
01a745ac 1865 vcpu->cpu = -1;
5ebda316 1866 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
db0758b2 1867 __stop_cpu_timer_accounting(vcpu);
805de8f4 1868 atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
37d9df98
DH		 1869 vcpu->arch.enabled_gmap = gmap_get_enabled();
1870 gmap_disable(vcpu->arch.enabled_gmap);
9977e886 1871
b0c632db
HC		 1872}
1873
1874static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
1875{
1876 /* this equals initial cpu reset in pop, but we don't switch to ESA */
1877 vcpu->arch.sie_block->gpsw.mask = 0UL;
1878 vcpu->arch.sie_block->gpsw.addr = 0UL;
8d26cf7b 1879 kvm_s390_set_prefix(vcpu, 0);
4287f247 1880 kvm_s390_set_cpu_timer(vcpu, 0);
b0c632db
HC		 1881 vcpu->arch.sie_block->ckc = 0UL;
1882 vcpu->arch.sie_block->todpr = 0;
1883 memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
1884 vcpu->arch.sie_block->gcr[0] = 0xE0UL;
1885 vcpu->arch.sie_block->gcr[14] = 0xC2000000UL;
9abc2a08
DH		 1886 /* make sure the new fpc will be lazily loaded */
1887 save_fpu_regs();
1888 current->thread.fpu.fpc = 0;
b0c632db 1889 vcpu->arch.sie_block->gbea = 1;
672550fb 1890 vcpu->arch.sie_block->pp = 0;
3c038e6b
DD		 1891 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
1892 kvm_clear_async_pf_completion_queue(vcpu);
6352e4d2
DH		 1893 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
1894 kvm_s390_vcpu_stop(vcpu);
2ed10cc1 1895 kvm_s390_clear_local_irqs(vcpu);
b0c632db
HC		 1896}
1897
31928aa5 1898void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
42897d86 1899{
72f25020 1900 mutex_lock(&vcpu->kvm->lock);
fdf03650 1901 preempt_disable();
72f25020 1902 vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
fdf03650 1903 preempt_enable();
72f25020 1904 mutex_unlock(&vcpu->kvm->lock);
25508824 1905 if (!kvm_is_ucontrol(vcpu->kvm)) {
dafd032a 1906 vcpu->arch.gmap = vcpu->kvm->arch.gmap;
eaa78f34 1907 sca_add_vcpu(vcpu);
25508824 1908 }
6502a34c
DH		 1909 if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
1910 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
37d9df98
DH		 1911 /* make vcpu_load load the right gmap on the first trigger */
1912 vcpu->arch.enabled_gmap = vcpu->arch.gmap;
42897d86
MT		 1913}
1914
5102ee87
TK		 1915static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
1916{
9d8d5786 1917 if (!test_kvm_facility(vcpu->kvm, 76))
5102ee87
TK		 1918 return;
1919
a374e892
TK		 1920 vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);
1921
1922 if (vcpu->kvm->arch.crypto.aes_kw)
1923 vcpu->arch.sie_block->ecb3 |= ECB3_AES;
1924 if (vcpu->kvm->arch.crypto.dea_kw)
1925 vcpu->arch.sie_block->ecb3 |= ECB3_DEA;
1926
5102ee87
TK		 1927 vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
1928}
1929
b31605c1
DD		 1930void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
1931{
1932 free_page(vcpu->arch.sie_block->cbrlo);
1933 vcpu->arch.sie_block->cbrlo = 0;
1934}
1935
1936int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
1937{
1938 vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
1939 if (!vcpu->arch.sie_block->cbrlo)
1940 return -ENOMEM;
1941
1942 vcpu->arch.sie_block->ecb2 |= 0x80;
1943 vcpu->arch.sie_block->ecb2 &= ~0x08;
1944 return 0;
1945}
1946
91520f1a
MM		 1947static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
1948{
1949 struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
1950
91520f1a 1951 vcpu->arch.sie_block->ibc = model->ibc;
80bc79dc 1952 if (test_kvm_facility(vcpu->kvm, 7))
c54f0d6a 1953 vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
91520f1a
MM		 1954}
1955
b0c632db
HC		 1956int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1957{
b31605c1 1958 int rc = 0;
b31288fa 1959
9e6dabef
CH		 1960 atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
1961 CPUSTAT_SM |
a4a4f191
GH		 1962 CPUSTAT_STOPPED);
1963
53df84f8 1964 if (test_kvm_facility(vcpu->kvm, 78))
805de8f4 1965 atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags);
53df84f8 1966 else if (test_kvm_facility(vcpu->kvm, 8))
805de8f4 1967 atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);
a4a4f191 1968
91520f1a
MM		 1969 kvm_s390_vcpu_setup_model(vcpu);
1970
bdab09f3
DH		 1971 /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
1972 if (MACHINE_HAS_ESOP)
1973 vcpu->arch.sie_block->ecb |= 0x02;
bd50e8ec
DH		 1974 if (test_kvm_facility(vcpu->kvm, 9))
1975 vcpu->arch.sie_block->ecb |= 0x04;
f597d24e 1976 if (test_kvm_facility(vcpu->kvm, 73))
7feb6bb8
MM		 1977 vcpu->arch.sie_block->ecb |= 0x10;
1978
873b425e 1979 if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
d6af0b49 1980 vcpu->arch.sie_block->ecb2 |= 0x08;
cd1836f5
JF		 1981 if (test_kvm_facility(vcpu->kvm, 130))
1982 vcpu->arch.sie_block->ecb2 |= 0x20;
48ee7d3a
DH		 1983 vcpu->arch.sie_block->eca = 0x1002000U;
1984 if (sclp.has_cei)
1985 vcpu->arch.sie_block->eca |= 0x80000000U;
11ad65b7
DH		 1986 if (sclp.has_ib)
1987 vcpu->arch.sie_block->eca |= 0x40000000U;
37c5f6c8 1988 if (sclp.has_siif)
217a4406 1989 vcpu->arch.sie_block->eca |= 1;
37c5f6c8 1990 if (sclp.has_sigpif)
ea5f4969 1991 vcpu->arch.sie_block->eca |= 0x10000000U;
18280d8b 1992 if (test_kvm_facility(vcpu->kvm, 129)) {
13211ea7
EF		 1993 vcpu->arch.sie_block->eca |= 0x00020000;
1994 vcpu->arch.sie_block->ecd |= 0x20000000;
1995 }
c6e5f166 1996 vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
492d8642 1997 vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
5a5e6536 1998
e6db1d61 1999 if (vcpu->kvm->arch.use_cmma) {
b31605c1
DD		 2000 rc = kvm_s390_vcpu_setup_cmma(vcpu);
2001 if (rc)
2002 return rc;
b31288fa 2003 }
0ac96caf 2004 hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ca872302 2005 vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
9d8d5786 2006
5102ee87
TK		 2007 kvm_s390_vcpu_crypto_setup(vcpu);
2008
b31605c1 2009 return rc;
b0c632db
HC		 2010}
2011
2012struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
2013 unsigned int id)
2014{
4d47555a 2015 struct kvm_vcpu *vcpu;
7feb6bb8 2016 struct sie_page *sie_page;
4d47555a
CO		 2017 int rc = -EINVAL;
2018
4215825e 2019 if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
4d47555a
CO		 2020 goto out;
2021
2022 rc = -ENOMEM;
b0c632db 2023
b110feaf 2024 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
b0c632db 2025 if (!vcpu)
4d47555a 2026 goto out;
b0c632db 2027
7feb6bb8
MM		 2028 sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
2029 if (!sie_page)
b0c632db
HC		 2030 goto out_free_cpu;
2031
7feb6bb8
MM		 2032 vcpu->arch.sie_block = &sie_page->sie_block;
2033 vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
2034
efed1104
DH		 2035 /* the real guest size will always be smaller than msl */
2036 vcpu->arch.sie_block->mso = 0;
2037 vcpu->arch.sie_block->msl = sclp.hamax;
2038
b0c632db 2039 vcpu->arch.sie_block->icpua = id;
ba5c1e9b 2040 spin_lock_init(&vcpu->arch.local_int.lock);
ba5c1e9b 2041 vcpu->arch.local_int.float_int = &kvm->arch.float_int;
d0321a24 2042 vcpu->arch.local_int.wq = &vcpu->wq;
5288fbf0 2043 vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags;
9c23a131 2044 seqcount_init(&vcpu->arch.cputm_seqcount);
ba5c1e9b 2045
b0c632db
HC		 2046 rc = kvm_vcpu_init(vcpu, kvm, id);
2047 if (rc)
9abc2a08 2048 goto out_free_sie_block;
8335713a 2049 VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu,
b0c632db 2050 vcpu->arch.sie_block);
ade38c31 2051 trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block);
b0c632db 2052
b0c632db 2053 return vcpu;
7b06bf2f
WY		 2054out_free_sie_block:
2055 free_page((unsigned long)(vcpu->arch.sie_block));
b0c632db 2056out_free_cpu:
b110feaf 2057 kmem_cache_free(kvm_vcpu_cache, vcpu);
4d47555a 2058out:
b0c632db
HC		 2059 return ERR_PTR(rc);
2060}
2061
b0c632db
HC		 2062int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
2063{
9a022067 2064 return kvm_s390_vcpu_has_irq(vcpu, 0);
b0c632db
HC		 2065}
2066
27406cd5 2067void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
49b99e1e 2068{
805de8f4 2069 atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
61a6df54 2070 exit_sie(vcpu);
49b99e1e
CB		 2071}
2072
27406cd5 2073void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
49b99e1e 2074{
805de8f4 2075 atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
49b99e1e
CB		 2076}
2077
8e236546
CB		 2078static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
2079{
805de8f4 2080 atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
61a6df54 2081 exit_sie(vcpu);
8e236546
CB		 2082}
2083
2084static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
2085{
9bf9fde2 2086 atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
8e236546
CB		 2087}
2088
49b99e1e
CB		 2089/*
2090 * Kick a guest cpu out of SIE and wait until SIE is not running.
2091 * If the CPU is not running (e.g. waiting as idle) the function will
2092 * return immediately. */
2093void exit_sie(struct kvm_vcpu *vcpu)
2094{
805de8f4 2095 atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
49b99e1e
CB		 2096 while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
2097 cpu_relax();
2098}
2099
8e236546
CB		 2100/* Kick a guest cpu out of SIE to process a request synchronously */
2101void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
49b99e1e 2102{
8e236546
CB		 2103 kvm_make_request(req, vcpu);
2104 kvm_s390_vcpu_request(vcpu);
49b99e1e
CB		 2105}
2106
414d3b07
MS		 2107static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
2108 unsigned long end)
2c70fe44 2109{
2c70fe44
CB		 2110 struct kvm *kvm = gmap->private;
2111 struct kvm_vcpu *vcpu;
414d3b07
MS		 2112 unsigned long prefix;
2113 int i;
2c70fe44 2114
65d0b0d4
DH		 2115 if (gmap_is_shadow(gmap))
2116 return;
414d3b07
MS		 2117 if (start >= 1UL << 31)
2118 /* We are only interested in prefix pages */
2119 return;
2c70fe44
CB		 2120 kvm_for_each_vcpu(i, vcpu, kvm) {
2121 /* match against both prefix pages */
414d3b07
MS		 2122 prefix = kvm_s390_get_prefix(vcpu);
2123 if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
2124 VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
2125 start, end);
8e236546 2126 kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
2c70fe44
CB		 2127 }
2128 }
2129}
2130
b6d33834
CD		 2131int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
2132{
2133 /* kvm common code refers to this, but never calls it */
2134 BUG();
2135 return 0;
2136}
2137
14eebd91
CO		 2138static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
2139 struct kvm_one_reg *reg)
2140{
2141 int r = -EINVAL;
2142
2143 switch (reg->id) {
29b7c71b
CO		 2144 case KVM_REG_S390_TODPR:
2145 r = put_user(vcpu->arch.sie_block->todpr,
2146 (u32 __user *)reg->addr);
2147 break;
2148 case KVM_REG_S390_EPOCHDIFF:
2149 r = put_user(vcpu->arch.sie_block->epoch,
2150 (u64 __user *)reg->addr);
2151 break;
46a6dd1c 2152 case KVM_REG_S390_CPU_TIMER:
4287f247 2153 r = put_user(kvm_s390_get_cpu_timer(vcpu),
46a6dd1c
J		 2154 (u64 __user *)reg->addr);
2155 break;
2156 case KVM_REG_S390_CLOCK_COMP:
2157 r = put_user(vcpu->arch.sie_block->ckc,
2158 (u64 __user *)reg->addr);
2159 break;
536336c2
DD		 2160 case KVM_REG_S390_PFTOKEN:
2161 r = put_user(vcpu->arch.pfault_token,
2162 (u64 __user *)reg->addr);
2163 break;
2164 case KVM_REG_S390_PFCOMPARE:
2165 r = put_user(vcpu->arch.pfault_compare,
2166 (u64 __user *)reg->addr);
2167 break;
2168 case KVM_REG_S390_PFSELECT:
2169 r = put_user(vcpu->arch.pfault_select,
2170 (u64 __user *)reg->addr);
2171 break;
672550fb
CB		 2172 case KVM_REG_S390_PP:
2173 r = put_user(vcpu->arch.sie_block->pp,
2174 (u64 __user *)reg->addr);
2175 break;
afa45ff5
CB		 2176 case KVM_REG_S390_GBEA:
2177 r = put_user(vcpu->arch.sie_block->gbea,
2178 (u64 __user *)reg->addr);
2179 break;
14eebd91
CO		 2180 default:
2181 break;
2182 }
2183
2184 return r;
2185}
2186
2187static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
2188 struct kvm_one_reg *reg)
2189{
2190 int r = -EINVAL;
4287f247 2191 __u64 val;
14eebd91
CO		 2192
2193 switch (reg->id) {
29b7c71b
CO		 2194 case KVM_REG_S390_TODPR:
2195 r = get_user(vcpu->arch.sie_block->todpr,
2196 (u32 __user *)reg->addr);
2197 break;
2198 case KVM_REG_S390_EPOCHDIFF:
2199 r = get_user(vcpu->arch.sie_block->epoch,
2200 (u64 __user *)reg->addr);
2201 break;
46a6dd1c 2202 case KVM_REG_S390_CPU_TIMER:
4287f247
DH		 2203 r = get_user(val, (u64 __user *)reg->addr);
2204 if (!r)
2205 kvm_s390_set_cpu_timer(vcpu, val);
46a6dd1c
J		 2206 break;
2207 case KVM_REG_S390_CLOCK_COMP:
2208 r = get_user(vcpu->arch.sie_block->ckc,
2209 (u64 __user *)reg->addr);
2210 break;
536336c2
DD		 2211 case KVM_REG_S390_PFTOKEN:
2212 r = get_user(vcpu->arch.pfault_token,
2213 (u64 __user *)reg->addr);
9fbd8082
DH		 2214 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
2215 kvm_clear_async_pf_completion_queue(vcpu);
536336c2
DD		 2216 break;
2217 case KVM_REG_S390_PFCOMPARE:
2218 r = get_user(vcpu->arch.pfault_compare,
2219 (u64 __user *)reg->addr);
2220 break;
2221 case KVM_REG_S390_PFSELECT:
2222 r = get_user(vcpu->arch.pfault_select,
2223 (u64 __user *)reg->addr);
2224 break;
672550fb
CB		 2225 case KVM_REG_S390_PP:
2226 r = get_user(vcpu->arch.sie_block->pp,
2227 (u64 __user *)reg->addr);
2228 break;
afa45ff5
CB		 2229 case KVM_REG_S390_GBEA:
2230 r = get_user(vcpu->arch.sie_block->gbea,
2231 (u64 __user *)reg->addr);
2232 break;
14eebd91
CO		 2233 default:
2234 break;
2235 }
2236
2237 return r;
2238}
b6d33834 2239
b0c632db
HC		 2240static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
2241{
b0c632db 2242 kvm_s390_vcpu_initial_reset(vcpu);
b0c632db
HC		 2243 return 0;
2244}
2245
2246int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2247{
5a32c1af 2248 memcpy(&vcpu->run->s.regs.gprs, &regs->gprs, sizeof(regs->gprs));
b0c632db
HC		 2249 return 0;
2250}
2251
2252int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2253{
5a32c1af 2254 memcpy(&regs->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
b0c632db
HC		 2255 return 0;
2256}
2257
2258int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2259 struct kvm_sregs *sregs)
2260{
59674c1a 2261 memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
b0c632db 2262 memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
b0c632db
HC		 2263 return 0;
2264}
2265
2266int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2267 struct kvm_sregs *sregs)
2268{
59674c1a 2269 memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
b0c632db 2270 memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
b0c632db
HC		 2271 return 0;
2272}
2273
2274int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2275{
4725c860
MS		 2276 if (test_fp_ctl(fpu->fpc))
2277 return -EINVAL;
e1788bb9 2278 vcpu->run->s.regs.fpc = fpu->fpc;
9abc2a08 2279 if (MACHINE_HAS_VX)
a7d4b8f2
DH		 2280 convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
2281 (freg_t *) fpu->fprs);
9abc2a08 2282 else
a7d4b8f2 2283 memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
b0c632db
HC		 2284 return 0;
2285}
2286
2287int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2288{
9abc2a08
DH		 2289 /* make sure we have the latest values */
2290 save_fpu_regs();
2291 if (MACHINE_HAS_VX)
a7d4b8f2
DH		 2292 convert_vx_to_fp((freg_t *) fpu->fprs,
2293 (__vector128 *) vcpu->run->s.regs.vrs);
9abc2a08 2294 else
a7d4b8f2 2295 memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
e1788bb9 2296 fpu->fpc = vcpu->run->s.regs.fpc;
b0c632db
HC		 2297 return 0;
2298}
2299
2300static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
2301{
2302 int rc = 0;
2303
7a42fdc2 2304 if (!is_vcpu_stopped(vcpu))
b0c632db 2305 rc = -EBUSY;
d7b0b5eb
CO		 2306 else {
2307 vcpu->run->psw_mask = psw.mask;
2308 vcpu->run->psw_addr = psw.addr;
2309 }
b0c632db
HC		 2310 return rc;
2311}
2312
2313int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2314 struct kvm_translation *tr)
2315{
2316 return -EINVAL; /* not implemented yet */
2317}
2318
27291e21
DH		 2319#define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
2320 KVM_GUESTDBG_USE_HW_BP | \
2321 KVM_GUESTDBG_ENABLE)
2322
d0bfb940
JK		 2323int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
2324 struct kvm_guest_debug *dbg)
b0c632db 2325{
27291e21
DH		 2326 int rc = 0;
2327
2328 vcpu->guest_debug = 0;
2329 kvm_s390_clear_bp_data(vcpu);
2330
2de3bfc2 2331 if (dbg->control & ~VALID_GUESTDBG_FLAGS)
27291e21 2332 return -EINVAL;
89b5b4de
DH		 2333 if (!sclp.has_gpere)
2334 return -EINVAL;
27291e21
DH		 2335
2336 if (dbg->control & KVM_GUESTDBG_ENABLE) {
2337 vcpu->guest_debug = dbg->control;
2338 /* enforce guest PER */
805de8f4 2339 atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
27291e21
DH		 2340
2341 if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
2342 rc = kvm_s390_import_bp_data(vcpu, dbg);
2343 } else {
805de8f4 2344 atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
27291e21
DH		 2345 vcpu->arch.guestdbg.last_bp = 0;
2346 }
2347
2348 if (rc) {
2349 vcpu->guest_debug = 0;
2350 kvm_s390_clear_bp_data(vcpu);
805de8f4 2351 atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
27291e21
DH		 2352 }
2353
2354 return rc;
b0c632db
HC		 2355}
2356
62d9f0db
MT		 2357int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2358 struct kvm_mp_state *mp_state)
2359{
6352e4d2
DH		 2360 /* CHECK_STOP and LOAD are not supported yet */
2361 return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
2362 KVM_MP_STATE_OPERATING;
62d9f0db
MT		 2363}
2364
2365int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2366 struct kvm_mp_state *mp_state)
2367{
6352e4d2
DH		 2368 int rc = 0;
2369
2370 /* user space knows about this interface - let it control the state */
2371 vcpu->kvm->arch.user_cpu_state_ctrl = 1;
2372
2373 switch (mp_state->mp_state) {
2374 case KVM_MP_STATE_STOPPED:
2375 kvm_s390_vcpu_stop(vcpu);
2376 break;
2377 case KVM_MP_STATE_OPERATING:
2378 kvm_s390_vcpu_start(vcpu);
2379 break;
2380 case KVM_MP_STATE_LOAD:
2381 case KVM_MP_STATE_CHECK_STOP:
2382 /* fall through - CHECK_STOP and LOAD are not supported yet */
2383 default:
2384 rc = -ENXIO;
2385 }
2386
2387 return rc;
62d9f0db
MT		 2388}
2389
8ad35755
DH		 2390static bool ibs_enabled(struct kvm_vcpu *vcpu)
2391{
2392 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS;
2393}
2394
2c70fe44
CB		 2395static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
2396{
8ad35755 2397retry:
8e236546 2398 kvm_s390_vcpu_request_handled(vcpu);
586b7ccd
CB		 2399 if (!vcpu->requests)
2400 return 0;
2c70fe44
CB		 2401 /*
2402 * We use MMU_RELOAD just to re-arm the ipte notifier for the
b2d73b2a 2403 * guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
2c70fe44
CB		 2404 * This ensures that the ipte instruction for this request has
2405 * already finished. We might race against a second unmapper that
2406 * wants to set the blocking bit. Lets just retry the request loop.
2407 */
8ad35755 2408 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
2c70fe44 2409 int rc;
b2d73b2a
MS		 2410 rc = gmap_mprotect_notify(vcpu->arch.gmap,
2411 kvm_s390_get_prefix(vcpu),
2412 PAGE_SIZE * 2, PROT_WRITE);
aca411a4
JN		 2413 if (rc) {
2414 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
2c70fe44 2415 return rc;
aca411a4 2416 }
8ad35755 2417 goto retry;
2c70fe44 2418 }
8ad35755 2419
d3d692c8
DH		 2420 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
2421 vcpu->arch.sie_block->ihcpu = 0xffff;
2422 goto retry;
2423 }
2424
8ad35755
DH		 2425 if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
2426 if (!ibs_enabled(vcpu)) {
2427 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
805de8f4 2428 atomic_or(CPUSTAT_IBS,
8ad35755
DH		 2429 &vcpu->arch.sie_block->cpuflags);
2430 }
2431 goto retry;
2c70fe44 2432 }
8ad35755
DH		 2433
2434 if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
2435 if (ibs_enabled(vcpu)) {
2436 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
805de8f4 2437 atomic_andnot(CPUSTAT_IBS,
8ad35755
DH		 2438 &vcpu->arch.sie_block->cpuflags);
2439 }
2440 goto retry;
2441 }
2442
6502a34c
DH		 2443 if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
2444 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
2445 goto retry;
2446 }
2447
0759d068
DH		 2448 /* nothing to do, just clear the request */
2449 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
2450
2c70fe44
CB		 2451 return 0;
2452}
2453
25ed1675
DH		 2454void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod)
2455{
2456 struct kvm_vcpu *vcpu;
2457 int i;
2458
2459 mutex_lock(&kvm->lock);
2460 preempt_disable();
2461 kvm->arch.epoch = tod - get_tod_clock();
2462 kvm_s390_vcpu_block_all(kvm);
2463 kvm_for_each_vcpu(i, vcpu, kvm)
2464 vcpu->arch.sie_block->epoch = kvm->arch.epoch;
2465 kvm_s390_vcpu_unblock_all(kvm);
2466 preempt_enable();
2467 mutex_unlock(&kvm->lock);
2468}
2469
fa576c58
TH		 2470/**
2471 * kvm_arch_fault_in_page - fault-in guest page if necessary
2472 * @vcpu: The corresponding virtual cpu
2473 * @gpa: Guest physical address
2474 * @writable: Whether the page should be writable or not
2475 *
2476 * Make sure that a guest page has been faulted-in on the host.
2477 *
2478 * Return: Zero on success, negative error code otherwise.
2479 */
2480long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
24eb3a82 2481{
527e30b4
MS		 2482 return gmap_fault(vcpu->arch.gmap, gpa,
2483 writable ? FAULT_FLAG_WRITE : 0);
24eb3a82
DD		 2484}
2485
3c038e6b
DD		 2486static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
2487 unsigned long token)
2488{
2489 struct kvm_s390_interrupt inti;
383d0b05 2490 struct kvm_s390_irq irq;
3c038e6b
DD		 2491
2492 if (start_token) {
383d0b05
JF		 2493 irq.u.ext.ext_params2 = token;
2494 irq.type = KVM_S390_INT_PFAULT_INIT;
2495 WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
3c038e6b
DD		 2496 } else {
2497 inti.type = KVM_S390_INT_PFAULT_DONE;
383d0b05 2498 inti.parm64 = token;
3c038e6b
DD		 2499 WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
2500 }
2501}
2502
2503void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
2504 struct kvm_async_pf *work)
2505{
2506 trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
2507 __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
2508}
2509
2510void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
2511 struct kvm_async_pf *work)
2512{
2513 trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
2514 __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
2515}
2516
2517void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
2518 struct kvm_async_pf *work)
2519{
2520 /* s390 will always inject the page directly */
2521}
2522
2523bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
2524{
2525 /*
2526 * s390 will always inject the page directly,
2527 * but we still want check_async_completion to cleanup
2528 */
2529 return true;
2530}
2531
2532static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
2533{
2534 hva_t hva;
2535 struct kvm_arch_async_pf arch;
2536 int rc;
2537
2538 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
2539 return 0;
2540 if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
2541 vcpu->arch.pfault_compare)
2542 return 0;
2543 if (psw_extint_disabled(vcpu))
2544 return 0;
9a022067 2545 if (kvm_s390_vcpu_has_irq(vcpu, 0))
3c038e6b
DD		 2546 return 0;
2547 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
2548 return 0;
2549 if (!vcpu->arch.gmap->pfault_enabled)
2550 return 0;
2551
81480cc1
HC		 2552 hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
2553 hva += current->thread.gmap_addr & ~PAGE_MASK;
2554 if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
3c038e6b
DD		 2555 return 0;
2556
2557 rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
2558 return rc;
2559}
2560
3fb4c40f 2561static int vcpu_pre_run(struct kvm_vcpu *vcpu)
b0c632db 2562{
3fb4c40f 2563 int rc, cpuflags;
e168bf8d 2564
3c038e6b
DD		 2565 /*
2566 * On s390 notifications for arriving pages will be delivered directly
2567 * to the guest but the house keeping for completed pfaults is
2568 * handled outside the worker.
2569 */
2570 kvm_check_async_pf_completion(vcpu);
2571
7ec7c8c7
CB		 2572 vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
2573 vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
b0c632db
HC		 2574
2575 if (need_resched())
2576 schedule();
2577
d3a73acb 2578 if (test_cpu_flag(CIF_MCCK_PENDING))
71cde587
CB		 2579 s390_handle_mcck();
2580
79395031
JF		 2581 if (!kvm_is_ucontrol(vcpu->kvm)) {
2582 rc = kvm_s390_deliver_pending_interrupts(vcpu);
2583 if (rc)
2584 return rc;
2585 }
0ff31867 2586
2c70fe44
CB		 2587 rc = kvm_s390_handle_requests(vcpu);
2588 if (rc)
2589 return rc;
2590
27291e21
DH		 2591 if (guestdbg_enabled(vcpu)) {
2592 kvm_s390_backup_guest_per_regs(vcpu);
2593 kvm_s390_patch_guest_per_regs(vcpu);
2594 }
2595
b0c632db 2596 vcpu->arch.sie_block->icptcode = 0;
3fb4c40f
TH		 2597 cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
2598 VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
2599 trace_kvm_s390_sie_enter(vcpu, cpuflags);
2b29a9fd 2600
3fb4c40f
TH		 2601 return 0;
2602}
2603
492d8642
TH		 2604static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
2605{
56317920
DH		 2606 struct kvm_s390_pgm_info pgm_info = {
2607 .code = PGM_ADDRESSING,
2608 };
2609 u8 opcode, ilen;
492d8642
TH		 2610 int rc;
2611
2612 VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
2613 trace_kvm_s390_sie_fault(vcpu);
2614
2615 /*
2616 * We want to inject an addressing exception, which is defined as a
2617 * suppressing or terminating exception. However, since we came here
2618 * by a DAT access exception, the PSW still points to the faulting
2619 * instruction since DAT exceptions are nullifying. So we've got
2620 * to look up the current opcode to get the length of the instruction
2621 * to be able to forward the PSW.
2622 */
3fa8cad7 2623 rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
56317920 2624 ilen = insn_length(opcode);
9b0d721a
DH		 2625 if (rc < 0) {
2626 return rc;
2627 } else if (rc) {
2628 /* Instruction-Fetching Exceptions - we can't detect the ilen.
2629 * Forward by arbitrary ilc, injection will take care of
2630 * nullification if necessary.
2631 */
2632 pgm_info = vcpu->arch.pgm;
2633 ilen = 4;
2634 }
56317920
DH		 2635 pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
2636 kvm_s390_forward_psw(vcpu, ilen);
2637 return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
492d8642
TH		 2638}
2639
3fb4c40f
TH		 2640static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
2641{
2b29a9fd
DD		 2642 VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
2643 vcpu->arch.sie_block->icptcode);
2644 trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
2645
27291e21
DH		 2646 if (guestdbg_enabled(vcpu))
2647 kvm_s390_restore_guest_per_regs(vcpu);
2648
7ec7c8c7
CB		 2649 vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
2650 vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
71f116bf
DH		 2651
2652 if (vcpu->arch.sie_block->icptcode > 0) {
2653 int rc = kvm_handle_sie_intercept(vcpu);
2654
2655 if (rc != -EOPNOTSUPP)
2656 return rc;
2657 vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
2658 vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
2659 vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
2660 vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
2661 return -EREMOTE;
2662 } else if (exit_reason != -EFAULT) {
2663 vcpu->stat.exit_null++;
2664 return 0;
210b1607
TH		 2665 } else if (kvm_is_ucontrol(vcpu->kvm)) {
2666 vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
2667 vcpu->run->s390_ucontrol.trans_exc_code =
2668 current->thread.gmap_addr;
2669 vcpu->run->s390_ucontrol.pgm_code = 0x10;
71f116bf 2670 return -EREMOTE;
24eb3a82 2671 } else if (current->thread.gmap_pfault) {
3c038e6b 2672 trace_kvm_s390_major_guest_pfault(vcpu);
24eb3a82 2673 current->thread.gmap_pfault = 0;
71f116bf
DH		 2674 if (kvm_arch_setup_async_pf(vcpu))
2675 return 0;
2676 return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
a76ccff6 2677 }
71f116bf 2678 return vcpu_post_run_fault_in_sie(vcpu);
3fb4c40f
TH		 2679}
2680
2681static int __vcpu_run(struct kvm_vcpu *vcpu)
2682{
2683 int rc, exit_reason;
2684
800c1065
TH		 2685 /*
2686 * We try to hold kvm->srcu during most of vcpu_run (except when run-
2687 * ning the guest), so that memslots (and other stuff) are protected
2688 */
2689 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2690
a76ccff6
TH		 2691 do {
2692 rc = vcpu_pre_run(vcpu);
2693 if (rc)
2694 break;
3fb4c40f 2695
800c1065 2696 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
a76ccff6
TH		 2697 /*
2698 * As PF_VCPU will be used in fault handler, between
2699 * guest_enter and guest_exit should be no uaccess.
2700 */
0097d12e 2701 local_irq_disable();
6edaa530 2702 guest_enter_irqoff();
db0758b2 2703 __disable_cpu_timer_accounting(vcpu);
0097d12e 2704 local_irq_enable();
a76ccff6
TH		 2705 exit_reason = sie64a(vcpu->arch.sie_block,
2706 vcpu->run->s.regs.gprs);
0097d12e 2707 local_irq_disable();
db0758b2 2708 __enable_cpu_timer_accounting(vcpu);
6edaa530 2709 guest_exit_irqoff();
0097d12e 2710 local_irq_enable();
800c1065 2711 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
a76ccff6
TH		 2712
2713 rc = vcpu_post_run(vcpu, exit_reason);
27291e21 2714 } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
3fb4c40f 2715
800c1065 2716 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
e168bf8d 2717 return rc;
b0c632db
HC		 2718}
2719
b028ee3e
DH		 2720static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2721{
2722 vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
2723 vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
2724 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
2725 kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
2726 if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
2727 memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
d3d692c8
DH		 2728 /* some control register changes require a tlb flush */
2729 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
b028ee3e
DH		 2730 }
2731 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
4287f247 2732 kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
b028ee3e
DH		 2733 vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
2734 vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
2735 vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
2736 vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
2737 }
2738 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
2739 vcpu->arch.pfault_token = kvm_run->s.regs.pft;
2740 vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
2741 vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
9fbd8082
DH		 2742 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
2743 kvm_clear_async_pf_completion_queue(vcpu);
b028ee3e 2744 }
80cd8763
FZ		 2745 /*
2746 * If userspace sets the riccb (e.g. after migration) to a valid state,
2747 * we should enable RI here instead of doing the lazy enablement.
2748 */
2749 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
2750 test_kvm_facility(vcpu->kvm, 64)) {
2751 struct runtime_instr_cb *riccb =
2752 (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
2753
2754 if (riccb->valid)
2755 vcpu->arch.sie_block->ecb3 |= 0x01;
2756 }
31d8b8d4
CB		 2757 save_access_regs(vcpu->arch.host_acrs);
2758 restore_access_regs(vcpu->run->s.regs.acrs);
e1788bb9
CB		 2759 /* save host (userspace) fprs/vrs */
2760 save_fpu_regs();
2761 vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
2762 vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
2763 if (MACHINE_HAS_VX)
2764 current->thread.fpu.regs = vcpu->run->s.regs.vrs;
2765 else
2766 current->thread.fpu.regs = vcpu->run->s.regs.fprs;
2767 current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
2768 if (test_fp_ctl(current->thread.fpu.fpc))
2769 /* User space provided an invalid FPC, let's clear it */
2770 current->thread.fpu.fpc = 0;
80cd8763 2771
b028ee3e
DH		 2772 kvm_run->kvm_dirty_regs = 0;
2773}
2774
2775static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2776{
2777 kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
2778 kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
2779 kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
2780 memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
4287f247 2781 kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
b028ee3e
DH		 2782 kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
2783 kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
2784 kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
2785 kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
2786 kvm_run->s.regs.pft = vcpu->arch.pfault_token;
2787 kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
2788 kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
31d8b8d4
CB		 2789 save_access_regs(vcpu->run->s.regs.acrs);
2790 restore_access_regs(vcpu->arch.host_acrs);
e1788bb9
CB		 2791 /* Save guest register state */
2792 save_fpu_regs();
2793 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
2794 /* Restore will be done lazily at return */
2795 current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
2796 current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
2797
b028ee3e
DH		 2798}
2799
b0c632db
HC		 2800int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2801{
8f2abe6a 2802 int rc;
b0c632db
HC		 2803 sigset_t sigsaved;
2804
460df4c1
PB		 2805 if (kvm_run->immediate_exit)
2806 return -EINTR;
2807
27291e21
DH		 2808 if (guestdbg_exit_pending(vcpu)) {
2809 kvm_s390_prepare_debug_exit(vcpu);
2810 return 0;
2811 }
2812
b0c632db
HC		 2813 if (vcpu->sigset_active)
2814 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2815
6352e4d2
DH		 2816 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
2817 kvm_s390_vcpu_start(vcpu);
2818 } else if (is_vcpu_stopped(vcpu)) {
ea2cdd27 2819 pr_err_ratelimited("can't run stopped vcpu %d\n",
6352e4d2
DH		 2820 vcpu->vcpu_id);
2821 return -EINVAL;
2822 }
b0c632db 2823
b028ee3e 2824 sync_regs(vcpu, kvm_run);
db0758b2 2825 enable_cpu_timer_accounting(vcpu);
d7b0b5eb 2826
dab4079d 2827 might_fault();
a76ccff6 2828 rc = __vcpu_run(vcpu);
9ace903d 2829
b1d16c49
CE		 2830 if (signal_pending(current) && !rc) {
2831 kvm_run->exit_reason = KVM_EXIT_INTR;
8f2abe6a 2832 rc = -EINTR;
b1d16c49 2833 }
8f2abe6a 2834
27291e21
DH		 2835 if (guestdbg_exit_pending(vcpu) && !rc) {
2836 kvm_s390_prepare_debug_exit(vcpu);
2837 rc = 0;
2838 }
2839
8f2abe6a 2840 if (rc == -EREMOTE) {
71f116bf 2841 /* userspace support is needed, kvm_run has been prepared */
8f2abe6a
CB		 2842 rc = 0;
2843 }
b0c632db 2844
db0758b2 2845 disable_cpu_timer_accounting(vcpu);
b028ee3e 2846 store_regs(vcpu, kvm_run);
d7b0b5eb 2847
b0c632db
HC		 2848 if (vcpu->sigset_active)
2849 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2850
b0c632db 2851 vcpu->stat.exit_userspace++;
7e8e6ab4 2852 return rc;
b0c632db
HC		 2853}
2854
b0c632db
HC		 2855/*
2856 * store status at address
2857 * we use have two special cases:
2858 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
2859 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
2860 */
d0bce605 2861int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
b0c632db 2862{
092670cd 2863 unsigned char archmode = 1;
9abc2a08 2864 freg_t fprs[NUM_FPRS];
fda902cb 2865 unsigned int px;
4287f247 2866 u64 clkcomp, cputm;
d0bce605 2867 int rc;
b0c632db 2868
d9a3a09a 2869 px = kvm_s390_get_prefix(vcpu);
d0bce605
HC		 2870 if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
2871 if (write_guest_abs(vcpu, 163, &archmode, 1))
b0c632db 2872 return -EFAULT;
d9a3a09a 2873 gpa = 0;
d0bce605
HC		 2874 } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
2875 if (write_guest_real(vcpu, 163, &archmode, 1))
b0c632db 2876 return -EFAULT;
d9a3a09a
MS		 2877 gpa = px;
2878 } else
2879 gpa -= __LC_FPREGS_SAVE_AREA;
9abc2a08
DH		 2880
2881 /* manually convert vector registers if necessary */
2882 if (MACHINE_HAS_VX) {
9522b37f 2883 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
9abc2a08
DH		 2884 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
2885 fprs, 128);
2886 } else {
2887 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
6fd8e67d 2888 vcpu->run->s.regs.fprs, 128);
9abc2a08 2889 }
d9a3a09a 2890 rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
d0bce605 2891 vcpu->run->s.regs.gprs, 128);
d9a3a09a 2892 rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
d0bce605 2893 &vcpu->arch.sie_block->gpsw, 16);
d9a3a09a 2894 rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
fda902cb 2895 &px, 4);
d9a3a09a 2896 rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
9abc2a08 2897 &vcpu->run->s.regs.fpc, 4);
d9a3a09a 2898 rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
d0bce605 2899 &vcpu->arch.sie_block->todpr, 4);
4287f247 2900 cputm = kvm_s390_get_cpu_timer(vcpu);
d9a3a09a 2901 rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
4287f247 2902 &cputm, 8);
178bd789 2903 clkcomp = vcpu->arch.sie_block->ckc >> 8;
d9a3a09a 2904 rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
d0bce605 2905 &clkcomp, 8);
d9a3a09a 2906 rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
d0bce605 2907 &vcpu->run->s.regs.acrs, 64);
d9a3a09a 2908 rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
d0bce605
HC		 2909 &vcpu->arch.sie_block->gcr, 128);
2910 return rc ? -EFAULT : 0;
b0c632db
HC		 2911}
2912
e879892c
TH		 2913int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
2914{
2915 /*
2916 * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
31d8b8d4 2917 * switch in the run ioctl. Let's update our copies before we save
e879892c
TH		 2918 * it into the save area
2919 */
d0164ee2 2920 save_fpu_regs();
9abc2a08 2921 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
e879892c
TH		 2922 save_access_regs(vcpu->run->s.regs.acrs);
2923
2924 return kvm_s390_store_status_unloaded(vcpu, addr);
2925}
2926
8ad35755
DH		 2927static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
2928{
2929 kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
8e236546 2930 kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
8ad35755
DH		 2931}
2932
2933static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
2934{
2935 unsigned int i;
2936 struct kvm_vcpu *vcpu;
2937
2938 kvm_for_each_vcpu(i, vcpu, kvm) {
2939 __disable_ibs_on_vcpu(vcpu);
2940 }
2941}
2942
2943static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
2944{
09a400e7
DH		 2945 if (!sclp.has_ibs)
2946 return;
8ad35755 2947 kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
8e236546 2948 kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
8ad35755
DH		 2949}
2950
6852d7b6
DH		 2951void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
2952{
8ad35755
DH		 2953 int i, online_vcpus, started_vcpus = 0;
2954
2955 if (!is_vcpu_stopped(vcpu))
2956 return;
2957
6852d7b6 2958 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
8ad35755 2959 /* Only one cpu at a time may enter/leave the STOPPED state. */
433b9ee4 2960 spin_lock(&vcpu->kvm->arch.start_stop_lock);
8ad35755
DH		 2961 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
2962
2963 for (i = 0; i < online_vcpus; i++) {
2964 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
2965 started_vcpus++;
2966 }
2967
2968 if (started_vcpus == 0) {
2969 /* we're the only active VCPU -> speed it up */
2970 __enable_ibs_on_vcpu(vcpu);
2971 } else if (started_vcpus == 1) {
2972 /*
2973 * As we are starting a second VCPU, we have to disable
2974 * the IBS facility on all VCPUs to remove potentially
2975 * oustanding ENABLE requests.
2976 */
2977 __disable_ibs_on_all_vcpus(vcpu->kvm);
2978 }
2979
805de8f4 2980 atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
8ad35755
DH		 2981 /*
2982 * Another VCPU might have used IBS while we were offline.
2983 * Let's play safe and flush the VCPU at startup.
2984 */
d3d692c8 2985 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
433b9ee4 2986 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
8ad35755 2987 return;
6852d7b6
DH		 2988}
2989
2990void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
2991{
8ad35755
DH		 2992 int i, online_vcpus, started_vcpus = 0;
2993 struct kvm_vcpu *started_vcpu = NULL;
2994
2995 if (is_vcpu_stopped(vcpu))
2996 return;
2997
6852d7b6 2998 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
8ad35755 2999 /* Only one cpu at a time may enter/leave the STOPPED state. */
433b9ee4 3000 spin_lock(&vcpu->kvm->arch.start_stop_lock);
8ad35755
DH		 3001 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
3002
32f5ff63 3003 /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
6cddd432 3004 kvm_s390_clear_stop_irq(vcpu);
32f5ff63 3005
805de8f4 3006 atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
8ad35755
DH		 3007 __disable_ibs_on_vcpu(vcpu);
3008
3009 for (i = 0; i < online_vcpus; i++) {
3010 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
3011 started_vcpus++;
3012 started_vcpu = vcpu->kvm->vcpus[i];
3013 }
3014 }
3015
3016 if (started_vcpus == 1) {
3017 /*
3018 * As we only have one VCPU left, we want to enable the
3019 * IBS facility for that VCPU to speed it up.
3020 */
3021 __enable_ibs_on_vcpu(started_vcpu);
3022 }
3023
433b9ee4 3024 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
8ad35755 3025 return;
6852d7b6
DH		 3026}
3027
d6712df9
CH		 3028static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
3029 struct kvm_enable_cap *cap)
3030{
3031 int r;
3032
3033 if (cap->flags)
3034 return -EINVAL;
3035
3036 switch (cap->cap) {
fa6b7fe9
CH		 3037 case KVM_CAP_S390_CSS_SUPPORT:
3038 if (!vcpu->kvm->arch.css_support) {
3039 vcpu->kvm->arch.css_support = 1;
c92ea7b9 3040 VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
fa6b7fe9
CH		 3041 trace_kvm_s390_enable_css(vcpu->kvm);
3042 }
3043 r = 0;
3044 break;
d6712df9
CH		 3045 default:
3046 r = -EINVAL;
3047 break;
3048 }
3049 return r;
3050}
3051
41408c28
TH		 3052static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
3053 struct kvm_s390_mem_op *mop)
3054{
3055 void __user *uaddr = (void __user *)mop->buf;
3056 void *tmpbuf = NULL;
3057 int r, srcu_idx;
3058 const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
3059 | KVM_S390_MEMOP_F_CHECK_ONLY;
3060
3061 if (mop->flags & ~supported_flags)
3062 return -EINVAL;
3063
3064 if (mop->size > MEM_OP_MAX_SIZE)
3065 return -E2BIG;
3066
3067 if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
3068 tmpbuf = vmalloc(mop->size);
3069 if (!tmpbuf)
3070 return -ENOMEM;
3071 }
3072
3073 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3074
3075 switch (mop->op) {
3076 case KVM_S390_MEMOP_LOGICAL_READ:
3077 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
92c96321
DH		 3078 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
3079 mop->size, GACC_FETCH);
41408c28
TH		 3080 break;
3081 }
3082 r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
3083 if (r == 0) {
3084 if (copy_to_user(uaddr, tmpbuf, mop->size))
3085 r = -EFAULT;
3086 }
3087 break;
3088 case KVM_S390_MEMOP_LOGICAL_WRITE:
3089 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
92c96321
DH		 3090 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
3091 mop->size, GACC_STORE);
41408c28
TH		 3092 break;
3093 }
3094 if (copy_from_user(tmpbuf, uaddr, mop->size)) {
3095 r = -EFAULT;
3096 break;
3097 }
3098 r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
3099 break;
3100 default:
3101 r = -EINVAL;
3102 }
3103
3104 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
3105
3106 if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
3107 kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
3108
3109 vfree(tmpbuf);
3110 return r;
3111}
3112
b0c632db
HC		 3113long kvm_arch_vcpu_ioctl(struct file *filp,
3114 unsigned int ioctl, unsigned long arg)
3115{
3116 struct kvm_vcpu *vcpu = filp->private_data;
3117 void __user *argp = (void __user *)arg;
800c1065 3118 int idx;
bc923cc9 3119 long r;
b0c632db 3120
93736624 3121 switch (ioctl) {
47b43c52
JF		 3122 case KVM_S390_IRQ: {
3123 struct kvm_s390_irq s390irq;
3124
3125 r = -EFAULT;
3126 if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
3127 break;
3128 r = kvm_s390_inject_vcpu(vcpu, &s390irq);
3129 break;
3130 }
93736624 3131 case KVM_S390_INTERRUPT: {
ba5c1e9b 3132 struct kvm_s390_interrupt s390int;
383d0b05 3133 struct kvm_s390_irq s390irq;
ba5c1e9b 3134
93736624 3135 r = -EFAULT;
ba5c1e9b 3136 if (copy_from_user(&s390int, argp, sizeof(s390int)))
93736624 3137 break;
383d0b05
JF		 3138 if (s390int_to_s390irq(&s390int, &s390irq))
3139 return -EINVAL;
3140 r = kvm_s390_inject_vcpu(vcpu, &s390irq);
93736624 3141 break;
ba5c1e9b 3142 }
b0c632db 3143 case KVM_S390_STORE_STATUS:
800c1065 3144 idx = srcu_read_lock(&vcpu->kvm->srcu);
bc923cc9 3145 r = kvm_s390_vcpu_store_status(vcpu, arg);
800c1065 3146 srcu_read_unlock(&vcpu->kvm->srcu, idx);
bc923cc9 3147 break;
b0c632db
HC		 3148 case KVM_S390_SET_INITIAL_PSW: {
3149 psw_t psw;
3150
bc923cc9 3151 r = -EFAULT;
b0c632db 3152 if (copy_from_user(&psw, argp, sizeof(psw)))
bc923cc9
AK		 3153 break;
3154 r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
3155 break;
b0c632db
HC		 3156 }
3157 case KVM_S390_INITIAL_RESET:
bc923cc9
AK		 3158 r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
3159 break;
14eebd91
CO		 3160 case KVM_SET_ONE_REG:
3161 case KVM_GET_ONE_REG: {
3162 struct kvm_one_reg reg;
3163 r = -EFAULT;
3164 if (copy_from_user(&reg, argp, sizeof(reg)))
3165 break;
3166 if (ioctl == KVM_SET_ONE_REG)
3167 r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, &reg);
3168 else
3169 r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, &reg);
3170 break;
3171 }
27e0393f
CO		 3172#ifdef CONFIG_KVM_S390_UCONTROL
3173 case KVM_S390_UCAS_MAP: {
3174 struct kvm_s390_ucas_mapping ucasmap;
3175
3176 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
3177 r = -EFAULT;
3178 break;
3179 }
3180
3181 if (!kvm_is_ucontrol(vcpu->kvm)) {
3182 r = -EINVAL;
3183 break;
3184 }
3185
3186 r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
3187 ucasmap.vcpu_addr, ucasmap.length);
3188 break;
3189 }
3190 case KVM_S390_UCAS_UNMAP: {
3191 struct kvm_s390_ucas_mapping ucasmap;
3192
3193 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
3194 r = -EFAULT;
3195 break;
3196 }
3197
3198 if (!kvm_is_ucontrol(vcpu->kvm)) {
3199 r = -EINVAL;
3200 break;
3201 }
3202
3203 r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
3204 ucasmap.length);
3205 break;
3206 }
3207#endif
ccc7910f 3208 case KVM_S390_VCPU_FAULT: {
527e30b4 3209 r = gmap_fault(vcpu->arch.gmap, arg, 0);
ccc7910f
CO		 3210 break;
3211 }
d6712df9
CH		 3212 case KVM_ENABLE_CAP:
3213 {
3214 struct kvm_enable_cap cap;
3215 r = -EFAULT;
3216 if (copy_from_user(&cap, argp, sizeof(cap)))
3217 break;
3218 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
3219 break;
3220 }
41408c28
TH		 3221 case KVM_S390_MEM_OP: {
3222 struct kvm_s390_mem_op mem_op;
3223
3224 if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
3225 r = kvm_s390_guest_mem_op(vcpu, &mem_op);
3226 else
3227 r = -EFAULT;
3228 break;
3229 }
816c7667
JF		 3230 case KVM_S390_SET_IRQ_STATE: {
3231 struct kvm_s390_irq_state irq_state;
3232
3233 r = -EFAULT;
3234 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
3235 break;
3236 if (irq_state.len > VCPU_IRQS_MAX_BUF ||
3237 irq_state.len == 0 ||
3238 irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
3239 r = -EINVAL;
3240 break;
3241 }
3242 r = kvm_s390_set_irq_state(vcpu,
3243 (void __user *) irq_state.buf,
3244 irq_state.len);
3245 break;
3246 }
3247 case KVM_S390_GET_IRQ_STATE: {
3248 struct kvm_s390_irq_state irq_state;
3249
3250 r = -EFAULT;
3251 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
3252 break;
3253 if (irq_state.len == 0) {
3254 r = -EINVAL;
3255 break;
3256 }
3257 r = kvm_s390_get_irq_state(vcpu,
3258 (__u8 __user *) irq_state.buf,
3259 irq_state.len);
3260 break;
3261 }
b0c632db 3262 default:
3e6afcf1 3263 r = -ENOTTY;
b0c632db 3264 }
bc923cc9 3265 return r;
b0c632db
HC		 3266}
3267
5b1c1493
CO		 3268int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
3269{
3270#ifdef CONFIG_KVM_S390_UCONTROL
3271 if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
3272 && (kvm_is_ucontrol(vcpu->kvm))) {
3273 vmf->page = virt_to_page(vcpu->arch.sie_block);
3274 get_page(vmf->page);
3275 return 0;
3276 }
3277#endif
3278 return VM_FAULT_SIGBUS;
3279}
3280
5587027c
AK		 3281int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
3282 unsigned long npages)
db3fe4eb
TY		 3283{
3284 return 0;
3285}
3286
b0c632db 3287/* Section: memory related */
f7784b8e
MT		 3288int kvm_arch_prepare_memory_region(struct kvm *kvm,
3289 struct kvm_memory_slot *memslot,
09170a49 3290 const struct kvm_userspace_memory_region *mem,
7b6195a9 3291 enum kvm_mr_change change)
b0c632db 3292{
dd2887e7
NW		 3293 /* A few sanity checks. We can have memory slots which have to be
3294 located/ended at a segment boundary (1MB). The memory in userland is
3295 ok to be fragmented into various different vmas. It is okay to mmap()
3296 and munmap() stuff in this slot after doing this call at any time */
b0c632db 3297
598841ca 3298 if (mem->userspace_addr & 0xffffful)
b0c632db
HC		 3299 return -EINVAL;
3300
598841ca 3301 if (mem->memory_size & 0xffffful)
b0c632db
HC		 3302 return -EINVAL;
3303
a3a92c31
DD		 3304 if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
3305 return -EINVAL;
3306
f7784b8e
MT		 3307 return 0;
3308}
3309
3310void kvm_arch_commit_memory_region(struct kvm *kvm,
09170a49 3311 const struct kvm_userspace_memory_region *mem,
8482644a 3312 const struct kvm_memory_slot *old,
f36f3f28 3313 const struct kvm_memory_slot *new,
8482644a 3314 enum kvm_mr_change change)
f7784b8e 3315{
f7850c92 3316 int rc;
f7784b8e 3317
2cef4deb
CB		 3318 /* If the basics of the memslot do not change, we do not want
3319 * to update the gmap. Every update causes several unnecessary
3320 * segment translation exceptions. This is usually handled just
3321 * fine by the normal fault handler + gmap, but it will also
3322 * cause faults on the prefix page of running guest CPUs.
3323 */
3324 if (old->userspace_addr == mem->userspace_addr &&
3325 old->base_gfn * PAGE_SIZE == mem->guest_phys_addr &&
3326 old->npages * PAGE_SIZE == mem->memory_size)
3327 return;
598841ca
CO		 3328
3329 rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
3330 mem->guest_phys_addr, mem->memory_size);
3331 if (rc)
ea2cdd27 3332 pr_warn("failed to commit memory region\n");
598841ca 3333 return;
b0c632db
HC		 3334}
3335
60a37709
AY		 3336static inline unsigned long nonhyp_mask(int i)
3337{
3338 unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
3339
3340 return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
3341}
3342
3491caf2
CB		 3343void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
3344{
3345 vcpu->valid_wakeup = false;
3346}
3347
b0c632db
HC		 3348static int __init kvm_s390_init(void)
3349{
60a37709
AY		 3350 int i;
3351
07197fd0
DH		 3352 if (!sclp.has_sief2) {
3353 pr_info("SIE not available\n");
3354 return -ENODEV;
3355 }
3356
60a37709
AY		 3357 for (i = 0; i < 16; i++)
3358 kvm_s390_fac_list_mask[i] |=
3359 S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
3360
9d8d5786 3361 return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
b0c632db
HC		 3362}
3363
3364static void __exit kvm_s390_exit(void)
3365{
3366 kvm_exit();
3367}
3368
3369module_init(kvm_s390_init);
3370module_exit(kvm_s390_exit);
566af940
CH		 3371
3372/*
3373 * Enable autoloading of the kvm module.
3374 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
3375 * since x86 takes a different approach.
3376 */
3377#include <linux/miscdevice.h>
3378MODULE_ALIAS_MISCDEV(KVM_MINOR);
3379MODULE_ALIAS("devname:kvm");
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