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Merge tag 'for-linus-v4.8' of git://github.com/martinbrandenburg/linux
[deliverable/linux.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>
a374e892 26#include <linux/random.h>
b0c632db 27#include <linux/slab.h>
ba5c1e9b 28#include <linux/timer.h>
41408c28 29#include <linux/vmalloc.h>
15c9705f 30#include <linux/bitmap.h>
cbb870c8 31#include <asm/asm-offsets.h>
b0c632db 32#include <asm/lowcore.h>
fd5ada04 33#include <asm/stp.h>
b0c632db 34#include <asm/pgtable.h>
1e133ab2 35#include <asm/gmap.h>
f5daba1d 36#include <asm/nmi.h>
a0616cde 37#include <asm/switch_to.h>
6d3da241 38#include <asm/isc.h>
1526bf9c 39#include <asm/sclp.h>
0a763c78 40#include <asm/cpacf.h>
221bb8a4 41#include <asm/timex.h>
8f2abe6a 42#include "kvm-s390.h"
b0c632db
HC		 43#include "gaccess.h"
44
ea2cdd27
DH		 45#define KMSG_COMPONENT "kvm-s390"
46#undef pr_fmt
47#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
48
5786fffa
CH		 49#define CREATE_TRACE_POINTS
50#include "trace.h"
ade38c31 51#include "trace-s390.h"
5786fffa 52
41408c28 53#define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */
816c7667
JF		 54#define LOCAL_IRQS 32
55#define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
56 (KVM_MAX_VCPUS + LOCAL_IRQS))
41408c28 57
b0c632db
HC		 58#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
59
60struct kvm_stats_debugfs_item debugfs_entries[] = {
61 { "userspace_handled", VCPU_STAT(exit_userspace) },
0eaeafa1 62 { "exit_null", VCPU_STAT(exit_null) },
8f2abe6a
CB		 63 { "exit_validity", VCPU_STAT(exit_validity) },
64 { "exit_stop_request", VCPU_STAT(exit_stop_request) },
65 { "exit_external_request", VCPU_STAT(exit_external_request) },
66 { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
ba5c1e9b 67 { "exit_instruction", VCPU_STAT(exit_instruction) },
9ec6de19 68 { "exit_pei", VCPU_STAT(exit_pei) },
ba5c1e9b
CO		 69 { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
70 { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
a011eeb2 71 { "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
f7819512 72 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
62bea5bf 73 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
3491caf2 74 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
ce2e4f0b 75 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
f5e10b09 76 { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
ba5c1e9b 77 { "instruction_lctl", VCPU_STAT(instruction_lctl) },
aba07508
DH		 78 { "instruction_stctl", VCPU_STAT(instruction_stctl) },
79 { "instruction_stctg", VCPU_STAT(instruction_stctg) },
ba5c1e9b 80 { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
7697e71f 81 { "deliver_external_call", VCPU_STAT(deliver_external_call) },
ba5c1e9b
CO		 82 { "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
83 { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) },
84 { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
85 { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
86 { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
87 { "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
88 { "exit_wait_state", VCPU_STAT(exit_wait_state) },
69d0d3a3 89 { "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
453423dc
CB		 90 { "instruction_stidp", VCPU_STAT(instruction_stidp) },
91 { "instruction_spx", VCPU_STAT(instruction_spx) },
92 { "instruction_stpx", VCPU_STAT(instruction_stpx) },
93 { "instruction_stap", VCPU_STAT(instruction_stap) },
94 { "instruction_storage_key", VCPU_STAT(instruction_storage_key) },
8a242234 95 { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
453423dc
CB		 96 { "instruction_stsch", VCPU_STAT(instruction_stsch) },
97 { "instruction_chsc", VCPU_STAT(instruction_chsc) },
b31288fa 98 { "instruction_essa", VCPU_STAT(instruction_essa) },
453423dc
CB		 99 { "instruction_stsi", VCPU_STAT(instruction_stsi) },
100 { "instruction_stfl", VCPU_STAT(instruction_stfl) },
bb25b9ba 101 { "instruction_tprot", VCPU_STAT(instruction_tprot) },
95ca2cb5 102 { "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
a3508fbe 103 { "instruction_sie", VCPU_STAT(instruction_sie) },
5288fbf0 104 { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
bd59d3a4 105 { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
7697e71f 106 { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
5288fbf0 107 { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
42cb0c9f
DH		 108 { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
109 { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
5288fbf0 110 { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
42cb0c9f
DH		 111 { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
112 { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
cd7b4b61 113 { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
5288fbf0
CB		 114 { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
115 { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
116 { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
42cb0c9f
DH		 117 { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) },
118 { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) },
119 { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) },
388186bc 120 { "diagnose_10", VCPU_STAT(diagnose_10) },
e28acfea 121 { "diagnose_44", VCPU_STAT(diagnose_44) },
41628d33 122 { "diagnose_9c", VCPU_STAT(diagnose_9c) },
175a5c9e
CB		 123 { "diagnose_258", VCPU_STAT(diagnose_258) },
124 { "diagnose_308", VCPU_STAT(diagnose_308) },
125 { "diagnose_500", VCPU_STAT(diagnose_500) },
b0c632db
HC		 126 { NULL }
127};
128
a411edf1
DH		 129/* allow nested virtualization in KVM (if enabled by user space) */
130static int nested;
131module_param(nested, int, S_IRUGO);
132MODULE_PARM_DESC(nested, "Nested virtualization support");
133
9d8d5786 134/* upper facilities limit for kvm */
60a37709
AY		 135unsigned long kvm_s390_fac_list_mask[16] = {
136 0xffe6000000000000UL,
137 0x005e000000000000UL,
9d8d5786 138};
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;
223 int cc = 3; /* subfunction not available */
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 */
251 __cpacf_query(CPACF_KMAC, kvm_s390_available_subfunc.kmac);
252 __cpacf_query(CPACF_KMC, kvm_s390_available_subfunc.kmc);
253 __cpacf_query(CPACF_KM, kvm_s390_available_subfunc.km);
254 __cpacf_query(CPACF_KIMD, kvm_s390_available_subfunc.kimd);
255 __cpacf_query(CPACF_KLMD, kvm_s390_available_subfunc.klmd);
256 }
257 if (test_facility(76)) /* MSA3 */
258 __cpacf_query(CPACF_PCKMO, kvm_s390_available_subfunc.pckmo);
259 if (test_facility(77)) { /* MSA4 */
260 __cpacf_query(CPACF_KMCTR, kvm_s390_available_subfunc.kmctr);
261 __cpacf_query(CPACF_KMF, kvm_s390_available_subfunc.kmf);
262 __cpacf_query(CPACF_KMO, kvm_s390_available_subfunc.kmo);
263 __cpacf_query(CPACF_PCC, kvm_s390_available_subfunc.pcc);
264 }
265 if (test_facility(57)) /* MSA5 */
266 __cpacf_query(CPACF_PPNO, kvm_s390_available_subfunc.ppno);
267
22be5a13
DH		 268 if (MACHINE_HAS_ESOP)
269 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
a3508fbe
DH		 270 /*
271 * We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
272 * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
273 */
274 if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
a411edf1 275 !test_facility(3) || !nested)
a3508fbe
DH		 276 return;
277 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
19c439b5
DH		 278 if (sclp.has_64bscao)
279 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
0615a326
DH		 280 if (sclp.has_siif)
281 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
77d18f6d
DH		 282 if (sclp.has_gpere)
283 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE);
a1b7b9b2
DH		 284 if (sclp.has_gsls)
285 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
5630a8e8
DH		 286 if (sclp.has_ib)
287 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
13ee3f67
DH		 288 if (sclp.has_cei)
289 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
7fd7f39d
DH		 290 if (sclp.has_ibs)
291 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
5d3876a8
DH		 292 /*
293 * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
294 * all skey handling functions read/set the skey from the PGSTE
295 * instead of the real storage key.
296 *
297 * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make
298 * pages being detected as preserved although they are resident.
299 *
300 * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will
301 * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY.
302 *
303 * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and
304 * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be
305 * correctly shadowed. We can do that for the PGSTE but not for PTE.I.
306 *
307 * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We
308 * cannot easily shadow the SCA because of the ipte lock.
309 */
22be5a13
DH		 310}
311
b0c632db
HC		 312int kvm_arch_init(void *opaque)
313{
78f26131
CB		 314 kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
315 if (!kvm_s390_dbf)
316 return -ENOMEM;
317
318 if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
319 debug_unregister(kvm_s390_dbf);
320 return -ENOMEM;
321 }
322
22be5a13
DH		 323 kvm_s390_cpu_feat_init();
324
84877d93
CH		 325 /* Register floating interrupt controller interface. */
326 return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
b0c632db
HC		 327}
328
78f26131
CB		 329void kvm_arch_exit(void)
330{
331 debug_unregister(kvm_s390_dbf);
332}
333
b0c632db
HC		 334/* Section: device related */
335long kvm_arch_dev_ioctl(struct file *filp,
336 unsigned int ioctl, unsigned long arg)
337{
338 if (ioctl == KVM_S390_ENABLE_SIE)
339 return s390_enable_sie();
340 return -EINVAL;
341}
342
784aa3d7 343int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
b0c632db 344{
d7b0b5eb
CO		 345 int r;
346
2bd0ac4e 347 switch (ext) {
d7b0b5eb 348 case KVM_CAP_S390_PSW:
b6cf8788 349 case KVM_CAP_S390_GMAP:
52e16b18 350 case KVM_CAP_SYNC_MMU:
1efd0f59
CO		 351#ifdef CONFIG_KVM_S390_UCONTROL
352 case KVM_CAP_S390_UCONTROL:
353#endif
3c038e6b 354 case KVM_CAP_ASYNC_PF:
60b413c9 355 case KVM_CAP_SYNC_REGS:
14eebd91 356 case KVM_CAP_ONE_REG:
d6712df9 357 case KVM_CAP_ENABLE_CAP:
fa6b7fe9 358 case KVM_CAP_S390_CSS_SUPPORT:
10ccaa1e 359 case KVM_CAP_IOEVENTFD:
c05c4186 360 case KVM_CAP_DEVICE_CTRL:
d938dc55 361 case KVM_CAP_ENABLE_CAP_VM:
78599d90 362 case KVM_CAP_S390_IRQCHIP:
f2061656 363 case KVM_CAP_VM_ATTRIBUTES:
6352e4d2 364 case KVM_CAP_MP_STATE:
47b43c52 365 case KVM_CAP_S390_INJECT_IRQ:
2444b352 366 case KVM_CAP_S390_USER_SIGP:
e44fc8c9 367 case KVM_CAP_S390_USER_STSI:
30ee2a98 368 case KVM_CAP_S390_SKEYS:
816c7667 369 case KVM_CAP_S390_IRQ_STATE:
6502a34c 370 case KVM_CAP_S390_USER_INSTR0:
d7b0b5eb
CO		 371 r = 1;
372 break;
41408c28
TH		 373 case KVM_CAP_S390_MEM_OP:
374 r = MEM_OP_MAX_SIZE;
375 break;
e726b1bd
CB		 376 case KVM_CAP_NR_VCPUS:
377 case KVM_CAP_MAX_VCPUS:
76a6dd72
DH		 378 r = KVM_S390_BSCA_CPU_SLOTS;
379 if (sclp.has_esca && sclp.has_64bscao)
380 r = KVM_S390_ESCA_CPU_SLOTS;
e726b1bd 381 break;
e1e2e605
NW		 382 case KVM_CAP_NR_MEMSLOTS:
383 r = KVM_USER_MEM_SLOTS;
384 break;
1526bf9c 385 case KVM_CAP_S390_COW:
abf09bed 386 r = MACHINE_HAS_ESOP;
1526bf9c 387 break;
68c55750
EF		 388 case KVM_CAP_S390_VECTOR_REGISTERS:
389 r = MACHINE_HAS_VX;
390 break;
c6e5f166
FZ		 391 case KVM_CAP_S390_RI:
392 r = test_facility(64);
393 break;
2bd0ac4e 394 default:
d7b0b5eb 395 r = 0;
2bd0ac4e 396 }
d7b0b5eb 397 return r;
b0c632db
HC		 398}
399
15f36ebd
JH		 400static void kvm_s390_sync_dirty_log(struct kvm *kvm,
401 struct kvm_memory_slot *memslot)
402{
403 gfn_t cur_gfn, last_gfn;
404 unsigned long address;
405 struct gmap *gmap = kvm->arch.gmap;
406
15f36ebd
JH		 407 /* Loop over all guest pages */
408 last_gfn = memslot->base_gfn + memslot->npages;
409 for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) {
410 address = gfn_to_hva_memslot(memslot, cur_gfn);
411
1e133ab2 412 if (test_and_clear_guest_dirty(gmap->mm, address))
15f36ebd 413 mark_page_dirty(kvm, cur_gfn);
1763f8d0
CB		 414 if (fatal_signal_pending(current))
415 return;
70c88a00 416 cond_resched();
15f36ebd 417 }
15f36ebd
JH		 418}
419
b0c632db 420/* Section: vm related */
a6e2f683
ED		 421static void sca_del_vcpu(struct kvm_vcpu *vcpu);
422
b0c632db
HC		 423/*
424 * Get (and clear) the dirty memory log for a memory slot.
425 */
426int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
427 struct kvm_dirty_log *log)
428{
15f36ebd
JH		 429 int r;
430 unsigned long n;
9f6b8029 431 struct kvm_memslots *slots;
15f36ebd
JH		 432 struct kvm_memory_slot *memslot;
433 int is_dirty = 0;
434
435 mutex_lock(&kvm->slots_lock);
436
437 r = -EINVAL;
438 if (log->slot >= KVM_USER_MEM_SLOTS)
439 goto out;
440
9f6b8029
PB		 441 slots = kvm_memslots(kvm);
442 memslot = id_to_memslot(slots, log->slot);
15f36ebd
JH		 443 r = -ENOENT;
444 if (!memslot->dirty_bitmap)
445 goto out;
446
447 kvm_s390_sync_dirty_log(kvm, memslot);
448 r = kvm_get_dirty_log(kvm, log, &is_dirty);
449 if (r)
450 goto out;
451
452 /* Clear the dirty log */
453 if (is_dirty) {
454 n = kvm_dirty_bitmap_bytes(memslot);
455 memset(memslot->dirty_bitmap, 0, n);
456 }
457 r = 0;
458out:
459 mutex_unlock(&kvm->slots_lock);
460 return r;
b0c632db
HC		 461}
462
6502a34c
DH		 463static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
464{
465 unsigned int i;
466 struct kvm_vcpu *vcpu;
467
468 kvm_for_each_vcpu(i, vcpu, kvm) {
469 kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu);
470 }
471}
472
d938dc55
CH		 473static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
474{
475 int r;
476
477 if (cap->flags)
478 return -EINVAL;
479
480 switch (cap->cap) {
84223598 481 case KVM_CAP_S390_IRQCHIP:
c92ea7b9 482 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
84223598
CH		 483 kvm->arch.use_irqchip = 1;
484 r = 0;
485 break;
2444b352 486 case KVM_CAP_S390_USER_SIGP:
c92ea7b9 487 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
2444b352
DH		 488 kvm->arch.user_sigp = 1;
489 r = 0;
490 break;
68c55750 491 case KVM_CAP_S390_VECTOR_REGISTERS:
5967c17b 492 mutex_lock(&kvm->lock);
a03825bb 493 if (kvm->created_vcpus) {
5967c17b
DH		 494 r = -EBUSY;
495 } else if (MACHINE_HAS_VX) {
c54f0d6a
DH		 496 set_kvm_facility(kvm->arch.model.fac_mask, 129);
497 set_kvm_facility(kvm->arch.model.fac_list, 129);
18280d8b
MM		 498 r = 0;
499 } else
500 r = -EINVAL;
5967c17b 501 mutex_unlock(&kvm->lock);
c92ea7b9
CB		 502 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
503 r ? "(not available)" : "(success)");
68c55750 504 break;
c6e5f166
FZ		 505 case KVM_CAP_S390_RI:
506 r = -EINVAL;
507 mutex_lock(&kvm->lock);
a03825bb 508 if (kvm->created_vcpus) {
c6e5f166
FZ		 509 r = -EBUSY;
510 } else if (test_facility(64)) {
c54f0d6a
DH		 511 set_kvm_facility(kvm->arch.model.fac_mask, 64);
512 set_kvm_facility(kvm->arch.model.fac_list, 64);
c6e5f166
FZ		 513 r = 0;
514 }
515 mutex_unlock(&kvm->lock);
516 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
517 r ? "(not available)" : "(success)");
518 break;
e44fc8c9 519 case KVM_CAP_S390_USER_STSI:
c92ea7b9 520 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
e44fc8c9
ET		 521 kvm->arch.user_stsi = 1;
522 r = 0;
523 break;
6502a34c
DH		 524 case KVM_CAP_S390_USER_INSTR0:
525 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0");
526 kvm->arch.user_instr0 = 1;
527 icpt_operexc_on_all_vcpus(kvm);
528 r = 0;
529 break;
d938dc55
CH		 530 default:
531 r = -EINVAL;
532 break;
533 }
534 return r;
535}
536
8c0a7ce6
DD		 537static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
538{
539 int ret;
540
541 switch (attr->attr) {
542 case KVM_S390_VM_MEM_LIMIT_SIZE:
543 ret = 0;
c92ea7b9 544 VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
a3a92c31
DD		 545 kvm->arch.mem_limit);
546 if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
8c0a7ce6
DD		 547 ret = -EFAULT;
548 break;
549 default:
550 ret = -ENXIO;
551 break;
552 }
553 return ret;
554}
555
556static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
4f718eab
DD		 557{
558 int ret;
559 unsigned int idx;
560 switch (attr->attr) {
561 case KVM_S390_VM_MEM_ENABLE_CMMA:
f9cbd9b0 562 ret = -ENXIO;
c24cc9c8 563 if (!sclp.has_cmma)
e6db1d61
DD		 564 break;
565
4f718eab 566 ret = -EBUSY;
c92ea7b9 567 VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
4f718eab 568 mutex_lock(&kvm->lock);
a03825bb 569 if (!kvm->created_vcpus) {
4f718eab
DD		 570 kvm->arch.use_cmma = 1;
571 ret = 0;
572 }
573 mutex_unlock(&kvm->lock);
574 break;
575 case KVM_S390_VM_MEM_CLR_CMMA:
f9cbd9b0
DH		 576 ret = -ENXIO;
577 if (!sclp.has_cmma)
578 break;
c3489155
DD		 579 ret = -EINVAL;
580 if (!kvm->arch.use_cmma)
581 break;
582
c92ea7b9 583 VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
4f718eab
DD		 584 mutex_lock(&kvm->lock);
585 idx = srcu_read_lock(&kvm->srcu);
a13cff31 586 s390_reset_cmma(kvm->arch.gmap->mm);
4f718eab
DD		 587 srcu_read_unlock(&kvm->srcu, idx);
588 mutex_unlock(&kvm->lock);
589 ret = 0;
590 break;
8c0a7ce6
DD		 591 case KVM_S390_VM_MEM_LIMIT_SIZE: {
592 unsigned long new_limit;
593
594 if (kvm_is_ucontrol(kvm))
595 return -EINVAL;
596
597 if (get_user(new_limit, (u64 __user *)attr->addr))
598 return -EFAULT;
599
a3a92c31
DD		 600 if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
601 new_limit > kvm->arch.mem_limit)
8c0a7ce6
DD		 602 return -E2BIG;
603
a3a92c31
DD		 604 if (!new_limit)
605 return -EINVAL;
606
6ea427bb 607 /* gmap_create takes last usable address */
a3a92c31
DD		 608 if (new_limit != KVM_S390_NO_MEM_LIMIT)
609 new_limit -= 1;
610
8c0a7ce6
DD		 611 ret = -EBUSY;
612 mutex_lock(&kvm->lock);
a03825bb 613 if (!kvm->created_vcpus) {
6ea427bb
MS		 614 /* gmap_create will round the limit up */
615 struct gmap *new = gmap_create(current->mm, new_limit);
8c0a7ce6
DD		 616
617 if (!new) {
618 ret = -ENOMEM;
619 } else {
6ea427bb 620 gmap_remove(kvm->arch.gmap);
8c0a7ce6
DD		 621 new->private = kvm;
622 kvm->arch.gmap = new;
623 ret = 0;
624 }
625 }
626 mutex_unlock(&kvm->lock);
a3a92c31
DD		 627 VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit);
628 VM_EVENT(kvm, 3, "New guest asce: 0x%pK",
629 (void *) kvm->arch.gmap->asce);
8c0a7ce6
DD		 630 break;
631 }
4f718eab
DD		 632 default:
633 ret = -ENXIO;
634 break;
635 }
636 return ret;
637}
638
a374e892
TK		 639static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);
640
641static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
642{
643 struct kvm_vcpu *vcpu;
644 int i;
645
9d8d5786 646 if (!test_kvm_facility(kvm, 76))
a374e892
TK		 647 return -EINVAL;
648
649 mutex_lock(&kvm->lock);
650 switch (attr->attr) {
651 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
652 get_random_bytes(
653 kvm->arch.crypto.crycb->aes_wrapping_key_mask,
654 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
655 kvm->arch.crypto.aes_kw = 1;
c92ea7b9 656 VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
a374e892
TK		 657 break;
658 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
659 get_random_bytes(
660 kvm->arch.crypto.crycb->dea_wrapping_key_mask,
661 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
662 kvm->arch.crypto.dea_kw = 1;
c92ea7b9 663 VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
a374e892
TK		 664 break;
665 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
666 kvm->arch.crypto.aes_kw = 0;
667 memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0,
668 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
c92ea7b9 669 VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
a374e892
TK		 670 break;
671 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
672 kvm->arch.crypto.dea_kw = 0;
673 memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0,
674 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
c92ea7b9 675 VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
a374e892
TK		 676 break;
677 default:
678 mutex_unlock(&kvm->lock);
679 return -ENXIO;
680 }
681
682 kvm_for_each_vcpu(i, vcpu, kvm) {
683 kvm_s390_vcpu_crypto_setup(vcpu);
684 exit_sie(vcpu);
685 }
686 mutex_unlock(&kvm->lock);
687 return 0;
688}
689
72f25020
JH		 690static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
691{
692 u8 gtod_high;
693
694 if (copy_from_user(&gtod_high, (void __user *)attr->addr,
695 sizeof(gtod_high)))
696 return -EFAULT;
697
698 if (gtod_high != 0)
699 return -EINVAL;
58c383c6 700 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
72f25020
JH		 701
702 return 0;
703}
704
705static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
706{
5a3d883a 707 u64 gtod;
72f25020
JH		 708
709 if (copy_from_user(&gtod, (void __user *)attr->addr, sizeof(gtod)))
710 return -EFAULT;
711
25ed1675 712 kvm_s390_set_tod_clock(kvm, gtod);
58c383c6 713 VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod);
72f25020
JH		 714 return 0;
715}
716
717static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
718{
719 int ret;
720
721 if (attr->flags)
722 return -EINVAL;
723
724 switch (attr->attr) {
725 case KVM_S390_VM_TOD_HIGH:
726 ret = kvm_s390_set_tod_high(kvm, attr);
727 break;
728 case KVM_S390_VM_TOD_LOW:
729 ret = kvm_s390_set_tod_low(kvm, attr);
730 break;
731 default:
732 ret = -ENXIO;
733 break;
734 }
735 return ret;
736}
737
738static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
739{
740 u8 gtod_high = 0;
741
742 if (copy_to_user((void __user *)attr->addr, &gtod_high,
743 sizeof(gtod_high)))
744 return -EFAULT;
58c383c6 745 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
72f25020
JH		 746
747 return 0;
748}
749
750static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
751{
5a3d883a 752 u64 gtod;
72f25020 753
60417fcc 754 gtod = kvm_s390_get_tod_clock_fast(kvm);
72f25020
JH		 755 if (copy_to_user((void __user *)attr->addr, &gtod, sizeof(gtod)))
756 return -EFAULT;
58c383c6 757 VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
72f25020
JH		 758
759 return 0;
760}
761
762static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
763{
764 int ret;
765
766 if (attr->flags)
767 return -EINVAL;
768
769 switch (attr->attr) {
770 case KVM_S390_VM_TOD_HIGH:
771 ret = kvm_s390_get_tod_high(kvm, attr);
772 break;
773 case KVM_S390_VM_TOD_LOW:
774 ret = kvm_s390_get_tod_low(kvm, attr);
775 break;
776 default:
777 ret = -ENXIO;
778 break;
779 }
780 return ret;
781}
782
658b6eda
MM		 783static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
784{
785 struct kvm_s390_vm_cpu_processor *proc;
053dd230 786 u16 lowest_ibc, unblocked_ibc;
658b6eda
MM		 787 int ret = 0;
788
789 mutex_lock(&kvm->lock);
a03825bb 790 if (kvm->created_vcpus) {
658b6eda
MM		 791 ret = -EBUSY;
792 goto out;
793 }
794 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
795 if (!proc) {
796 ret = -ENOMEM;
797 goto out;
798 }
799 if (!copy_from_user(proc, (void __user *)attr->addr,
800 sizeof(*proc))) {
9bb0ec09 801 kvm->arch.model.cpuid = proc->cpuid;
053dd230
DH		 802 lowest_ibc = sclp.ibc >> 16 & 0xfff;
803 unblocked_ibc = sclp.ibc & 0xfff;
0487c44d 804 if (lowest_ibc && proc->ibc) {
053dd230
DH		 805 if (proc->ibc > unblocked_ibc)
806 kvm->arch.model.ibc = unblocked_ibc;
807 else if (proc->ibc < lowest_ibc)
808 kvm->arch.model.ibc = lowest_ibc;
809 else
810 kvm->arch.model.ibc = proc->ibc;
811 }
c54f0d6a 812 memcpy(kvm->arch.model.fac_list, proc->fac_list,
658b6eda
MM		 813 S390_ARCH_FAC_LIST_SIZE_BYTE);
814 } else
815 ret = -EFAULT;
816 kfree(proc);
817out:
818 mutex_unlock(&kvm->lock);
819 return ret;
820}
821
15c9705f
DH		 822static int kvm_s390_set_processor_feat(struct kvm *kvm,
823 struct kvm_device_attr *attr)
824{
825 struct kvm_s390_vm_cpu_feat data;
826 int ret = -EBUSY;
827
828 if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
829 return -EFAULT;
830 if (!bitmap_subset((unsigned long *) data.feat,
831 kvm_s390_available_cpu_feat,
832 KVM_S390_VM_CPU_FEAT_NR_BITS))
833 return -EINVAL;
834
835 mutex_lock(&kvm->lock);
836 if (!atomic_read(&kvm->online_vcpus)) {
837 bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
838 KVM_S390_VM_CPU_FEAT_NR_BITS);
839 ret = 0;
840 }
841 mutex_unlock(&kvm->lock);
842 return ret;
843}
844
0a763c78
DH		 845static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
846 struct kvm_device_attr *attr)
847{
848 /*
849 * Once supported by kernel + hw, we have to store the subfunctions
850 * in kvm->arch and remember that user space configured them.
851 */
852 return -ENXIO;
853}
854
658b6eda
MM		 855static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
856{
857 int ret = -ENXIO;
858
859 switch (attr->attr) {
860 case KVM_S390_VM_CPU_PROCESSOR:
861 ret = kvm_s390_set_processor(kvm, attr);
862 break;
15c9705f
DH		 863 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
864 ret = kvm_s390_set_processor_feat(kvm, attr);
865 break;
0a763c78
DH		 866 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
867 ret = kvm_s390_set_processor_subfunc(kvm, attr);
868 break;
658b6eda
MM		 869 }
870 return ret;
871}
872
873static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
874{
875 struct kvm_s390_vm_cpu_processor *proc;
876 int ret = 0;
877
878 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
879 if (!proc) {
880 ret = -ENOMEM;
881 goto out;
882 }
9bb0ec09 883 proc->cpuid = kvm->arch.model.cpuid;
658b6eda 884 proc->ibc = kvm->arch.model.ibc;
c54f0d6a
DH		 885 memcpy(&proc->fac_list, kvm->arch.model.fac_list,
886 S390_ARCH_FAC_LIST_SIZE_BYTE);
658b6eda
MM		 887 if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
888 ret = -EFAULT;
889 kfree(proc);
890out:
891 return ret;
892}
893
894static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
895{
896 struct kvm_s390_vm_cpu_machine *mach;
897 int ret = 0;
898
899 mach = kzalloc(sizeof(*mach), GFP_KERNEL);
900 if (!mach) {
901 ret = -ENOMEM;
902 goto out;
903 }
904 get_cpu_id((struct cpuid *) &mach->cpuid);
37c5f6c8 905 mach->ibc = sclp.ibc;
c54f0d6a 906 memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
981467c9 907 S390_ARCH_FAC_LIST_SIZE_BYTE);
658b6eda 908 memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
94422ee8 909 S390_ARCH_FAC_LIST_SIZE_BYTE);
658b6eda
MM		 910 if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
911 ret = -EFAULT;
912 kfree(mach);
913out:
914 return ret;
915}
916
15c9705f
DH		 917static int kvm_s390_get_processor_feat(struct kvm *kvm,
918 struct kvm_device_attr *attr)
919{
920 struct kvm_s390_vm_cpu_feat data;
921
922 bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat,
923 KVM_S390_VM_CPU_FEAT_NR_BITS);
924 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
925 return -EFAULT;
926 return 0;
927}
928
929static int kvm_s390_get_machine_feat(struct kvm *kvm,
930 struct kvm_device_attr *attr)
931{
932 struct kvm_s390_vm_cpu_feat data;
933
934 bitmap_copy((unsigned long *) data.feat,
935 kvm_s390_available_cpu_feat,
936 KVM_S390_VM_CPU_FEAT_NR_BITS);
937 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
938 return -EFAULT;
939 return 0;
940}
941
0a763c78
DH		 942static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
943 struct kvm_device_attr *attr)
944{
945 /*
946 * Once we can actually configure subfunctions (kernel + hw support),
947 * we have to check if they were already set by user space, if so copy
948 * them from kvm->arch.
949 */
950 return -ENXIO;
951}
952
953static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
954 struct kvm_device_attr *attr)
955{
956 if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
957 sizeof(struct kvm_s390_vm_cpu_subfunc)))
958 return -EFAULT;
959 return 0;
960}
658b6eda
MM		 961static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
962{
963 int ret = -ENXIO;
964
965 switch (attr->attr) {
966 case KVM_S390_VM_CPU_PROCESSOR:
967 ret = kvm_s390_get_processor(kvm, attr);
968 break;
969 case KVM_S390_VM_CPU_MACHINE:
970 ret = kvm_s390_get_machine(kvm, attr);
971 break;
15c9705f
DH		 972 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
973 ret = kvm_s390_get_processor_feat(kvm, attr);
974 break;
975 case KVM_S390_VM_CPU_MACHINE_FEAT:
976 ret = kvm_s390_get_machine_feat(kvm, attr);
977 break;
0a763c78
DH		 978 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
979 ret = kvm_s390_get_processor_subfunc(kvm, attr);
980 break;
981 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
982 ret = kvm_s390_get_machine_subfunc(kvm, attr);
983 break;
658b6eda
MM		 984 }
985 return ret;
986}
987
f2061656
DD		 988static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
989{
990 int ret;
991
992 switch (attr->group) {
4f718eab 993 case KVM_S390_VM_MEM_CTRL:
8c0a7ce6 994 ret = kvm_s390_set_mem_control(kvm, attr);
4f718eab 995 break;
72f25020
JH		 996 case KVM_S390_VM_TOD:
997 ret = kvm_s390_set_tod(kvm, attr);
998 break;
658b6eda
MM		 999 case KVM_S390_VM_CPU_MODEL:
1000 ret = kvm_s390_set_cpu_model(kvm, attr);
1001 break;
a374e892
TK		 1002 case KVM_S390_VM_CRYPTO:
1003 ret = kvm_s390_vm_set_crypto(kvm, attr);
1004 break;
f2061656
DD		 1005 default:
1006 ret = -ENXIO;
1007 break;
1008 }
1009
1010 return ret;
1011}
1012
1013static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1014{
8c0a7ce6
DD		 1015 int ret;
1016
1017 switch (attr->group) {
1018 case KVM_S390_VM_MEM_CTRL:
1019 ret = kvm_s390_get_mem_control(kvm, attr);
1020 break;
72f25020
JH		 1021 case KVM_S390_VM_TOD:
1022 ret = kvm_s390_get_tod(kvm, attr);
1023 break;
658b6eda
MM		 1024 case KVM_S390_VM_CPU_MODEL:
1025 ret = kvm_s390_get_cpu_model(kvm, attr);
1026 break;
8c0a7ce6
DD		 1027 default:
1028 ret = -ENXIO;
1029 break;
1030 }
1031
1032 return ret;
f2061656
DD		 1033}
1034
1035static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1036{
1037 int ret;
1038
1039 switch (attr->group) {
4f718eab
DD		 1040 case KVM_S390_VM_MEM_CTRL:
1041 switch (attr->attr) {
1042 case KVM_S390_VM_MEM_ENABLE_CMMA:
1043 case KVM_S390_VM_MEM_CLR_CMMA:
f9cbd9b0
DH		 1044 ret = sclp.has_cmma ? 0 : -ENXIO;
1045 break;
8c0a7ce6 1046 case KVM_S390_VM_MEM_LIMIT_SIZE:
4f718eab
DD		 1047 ret = 0;
1048 break;
1049 default:
1050 ret = -ENXIO;
1051 break;
1052 }
1053 break;
72f25020
JH		 1054 case KVM_S390_VM_TOD:
1055 switch (attr->attr) {
1056 case KVM_S390_VM_TOD_LOW:
1057 case KVM_S390_VM_TOD_HIGH:
1058 ret = 0;
1059 break;
1060 default:
1061 ret = -ENXIO;
1062 break;
1063 }
1064 break;
658b6eda
MM		 1065 case KVM_S390_VM_CPU_MODEL:
1066 switch (attr->attr) {
1067 case KVM_S390_VM_CPU_PROCESSOR:
1068 case KVM_S390_VM_CPU_MACHINE:
15c9705f
DH		 1069 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1070 case KVM_S390_VM_CPU_MACHINE_FEAT:
0a763c78 1071 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
658b6eda
MM		 1072 ret = 0;
1073 break;
0a763c78
DH		 1074 /* configuring subfunctions is not supported yet */
1075 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
658b6eda
MM		 1076 default:
1077 ret = -ENXIO;
1078 break;
1079 }
1080 break;
a374e892
TK		 1081 case KVM_S390_VM_CRYPTO:
1082 switch (attr->attr) {
1083 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
1084 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
1085 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
1086 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
1087 ret = 0;
1088 break;
1089 default:
1090 ret = -ENXIO;
1091 break;
1092 }
1093 break;
f2061656
DD		 1094 default:
1095 ret = -ENXIO;
1096 break;
1097 }
1098
1099 return ret;
1100}
1101
30ee2a98
JH		 1102static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1103{
1104 uint8_t *keys;
1105 uint64_t hva;
30ee2a98
JH		 1106 int i, r = 0;
1107
1108 if (args->flags != 0)
1109 return -EINVAL;
1110
1111 /* Is this guest using storage keys? */
1112 if (!mm_use_skey(current->mm))
1113 return KVM_S390_GET_SKEYS_NONE;
1114
1115 /* Enforce sane limit on memory allocation */
1116 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1117 return -EINVAL;
1118
1119 keys = kmalloc_array(args->count, sizeof(uint8_t),
1120 GFP_KERNEL | __GFP_NOWARN);
1121 if (!keys)
1122 keys = vmalloc(sizeof(uint8_t) * args->count);
1123 if (!keys)
1124 return -ENOMEM;
1125
d3ed1cee 1126 down_read(&current->mm->mmap_sem);
30ee2a98
JH		 1127 for (i = 0; i < args->count; i++) {
1128 hva = gfn_to_hva(kvm, args->start_gfn + i);
1129 if (kvm_is_error_hva(hva)) {
1130 r = -EFAULT;
d3ed1cee 1131 break;
30ee2a98
JH		 1132 }
1133
154c8c19
DH		 1134 r = get_guest_storage_key(current->mm, hva, &keys[i]);
1135 if (r)
d3ed1cee 1136 break;
30ee2a98 1137 }
d3ed1cee
MS		 1138 up_read(&current->mm->mmap_sem);
1139
1140 if (!r) {
1141 r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
1142 sizeof(uint8_t) * args->count);
1143 if (r)
1144 r = -EFAULT;
30ee2a98
JH		 1145 }
1146
30ee2a98
JH		 1147 kvfree(keys);
1148 return r;
1149}
1150
1151static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1152{
1153 uint8_t *keys;
1154 uint64_t hva;
1155 int i, r = 0;
1156
1157 if (args->flags != 0)
1158 return -EINVAL;
1159
1160 /* Enforce sane limit on memory allocation */
1161 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1162 return -EINVAL;
1163
1164 keys = kmalloc_array(args->count, sizeof(uint8_t),
1165 GFP_KERNEL | __GFP_NOWARN);
1166 if (!keys)
1167 keys = vmalloc(sizeof(uint8_t) * args->count);
1168 if (!keys)
1169 return -ENOMEM;
1170
1171 r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
1172 sizeof(uint8_t) * args->count);
1173 if (r) {
1174 r = -EFAULT;
1175 goto out;
1176 }
1177
1178 /* Enable storage key handling for the guest */
14d4a425
DD		 1179 r = s390_enable_skey();
1180 if (r)
1181 goto out;
30ee2a98 1182
d3ed1cee 1183 down_read(&current->mm->mmap_sem);
30ee2a98
JH		 1184 for (i = 0; i < args->count; i++) {
1185 hva = gfn_to_hva(kvm, args->start_gfn + i);
1186 if (kvm_is_error_hva(hva)) {
1187 r = -EFAULT;
d3ed1cee 1188 break;
30ee2a98
JH		 1189 }
1190
1191 /* Lowest order bit is reserved */
1192 if (keys[i] & 0x01) {
1193 r = -EINVAL;
d3ed1cee 1194 break;
30ee2a98
JH		 1195 }
1196
fe69eabf 1197 r = set_guest_storage_key(current->mm, hva, keys[i], 0);
30ee2a98 1198 if (r)
d3ed1cee 1199 break;
30ee2a98 1200 }
d3ed1cee 1201 up_read(&current->mm->mmap_sem);
30ee2a98
JH		 1202out:
1203 kvfree(keys);
1204 return r;
1205}
1206
b0c632db
HC		 1207long kvm_arch_vm_ioctl(struct file *filp,
1208 unsigned int ioctl, unsigned long arg)
1209{
1210 struct kvm *kvm = filp->private_data;
1211 void __user *argp = (void __user *)arg;
f2061656 1212 struct kvm_device_attr attr;
b0c632db
HC		 1213 int r;
1214
1215 switch (ioctl) {
ba5c1e9b
CO		 1216 case KVM_S390_INTERRUPT: {
1217 struct kvm_s390_interrupt s390int;
1218
1219 r = -EFAULT;
1220 if (copy_from_user(&s390int, argp, sizeof(s390int)))
1221 break;
1222 r = kvm_s390_inject_vm(kvm, &s390int);
1223 break;
1224 }
d938dc55
CH		 1225 case KVM_ENABLE_CAP: {
1226 struct kvm_enable_cap cap;
1227 r = -EFAULT;
1228 if (copy_from_user(&cap, argp, sizeof(cap)))
1229 break;
1230 r = kvm_vm_ioctl_enable_cap(kvm, &cap);
1231 break;
1232 }
84223598
CH		 1233 case KVM_CREATE_IRQCHIP: {
1234 struct kvm_irq_routing_entry routing;
1235
1236 r = -EINVAL;
1237 if (kvm->arch.use_irqchip) {
1238 /* Set up dummy routing. */
1239 memset(&routing, 0, sizeof(routing));
152b2839 1240 r = kvm_set_irq_routing(kvm, &routing, 0, 0);
84223598
CH		 1241 }
1242 break;
1243 }
f2061656
DD		 1244 case KVM_SET_DEVICE_ATTR: {
1245 r = -EFAULT;
1246 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
1247 break;
1248 r = kvm_s390_vm_set_attr(kvm, &attr);
1249 break;
1250 }
1251 case KVM_GET_DEVICE_ATTR: {
1252 r = -EFAULT;
1253 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
1254 break;
1255 r = kvm_s390_vm_get_attr(kvm, &attr);
1256 break;
1257 }
1258 case KVM_HAS_DEVICE_ATTR: {
1259 r = -EFAULT;
1260 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
1261 break;
1262 r = kvm_s390_vm_has_attr(kvm, &attr);
1263 break;
1264 }
30ee2a98
JH		 1265 case KVM_S390_GET_SKEYS: {
1266 struct kvm_s390_skeys args;
1267
1268 r = -EFAULT;
1269 if (copy_from_user(&args, argp,
1270 sizeof(struct kvm_s390_skeys)))
1271 break;
1272 r = kvm_s390_get_skeys(kvm, &args);
1273 break;
1274 }
1275 case KVM_S390_SET_SKEYS: {
1276 struct kvm_s390_skeys args;
1277
1278 r = -EFAULT;
1279 if (copy_from_user(&args, argp,
1280 sizeof(struct kvm_s390_skeys)))
1281 break;
1282 r = kvm_s390_set_skeys(kvm, &args);
1283 break;
1284 }
b0c632db 1285 default:
367e1319 1286 r = -ENOTTY;
b0c632db
HC		 1287 }
1288
1289 return r;
1290}
1291
45c9b47c
TK		 1292static int kvm_s390_query_ap_config(u8 *config)
1293{
1294 u32 fcn_code = 0x04000000UL;
86044c8c 1295 u32 cc = 0;
45c9b47c 1296
86044c8c 1297 memset(config, 0, 128);
45c9b47c
TK		 1298 asm volatile(
1299 "lgr 0,%1\n"
1300 "lgr 2,%2\n"
1301 ".long 0xb2af0000\n" /* PQAP(QCI) */
86044c8c 1302 "0: ipm %0\n"
45c9b47c 1303 "srl %0,28\n"
86044c8c
CB		 1304 "1:\n"
1305 EX_TABLE(0b, 1b)
1306 : "+r" (cc)
45c9b47c
TK		 1307 : "r" (fcn_code), "r" (config)
1308 : "cc", "0", "2", "memory"
1309 );
1310
1311 return cc;
1312}
1313
1314static int kvm_s390_apxa_installed(void)
1315{
1316 u8 config[128];
1317 int cc;
1318
a6aacc3f 1319 if (test_facility(12)) {
45c9b47c
TK		 1320 cc = kvm_s390_query_ap_config(config);
1321
1322 if (cc)
1323 pr_err("PQAP(QCI) failed with cc=%d", cc);
1324 else
1325 return config[0] & 0x40;
1326 }
1327
1328 return 0;
1329}
1330
1331static void kvm_s390_set_crycb_format(struct kvm *kvm)
1332{
1333 kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
1334
1335 if (kvm_s390_apxa_installed())
1336 kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
1337 else
1338 kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
1339}
1340
9bb0ec09 1341static u64 kvm_s390_get_initial_cpuid(void)
9d8d5786 1342{
9bb0ec09
DH		 1343 struct cpuid cpuid;
1344
1345 get_cpu_id(&cpuid);
1346 cpuid.version = 0xff;
1347 return *((u64 *) &cpuid);
9d8d5786
MM		 1348}
1349
c54f0d6a 1350static void kvm_s390_crypto_init(struct kvm *kvm)
5102ee87 1351{
9d8d5786 1352 if (!test_kvm_facility(kvm, 76))
c54f0d6a 1353 return;
5102ee87 1354
c54f0d6a 1355 kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
45c9b47c 1356 kvm_s390_set_crycb_format(kvm);
5102ee87 1357
ed6f76b4
TK		 1358 /* Enable AES/DEA protected key functions by default */
1359 kvm->arch.crypto.aes_kw = 1;
1360 kvm->arch.crypto.dea_kw = 1;
1361 get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
1362 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
1363 get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
1364 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
5102ee87
TK		 1365}
1366
7d43bafc
ED		 1367static void sca_dispose(struct kvm *kvm)
1368{
1369 if (kvm->arch.use_esca)
5e044315 1370 free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
7d43bafc
ED		 1371 else
1372 free_page((unsigned long)(kvm->arch.sca));
1373 kvm->arch.sca = NULL;
1374}
1375
e08b9637 1376int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
b0c632db 1377{
76a6dd72 1378 gfp_t alloc_flags = GFP_KERNEL;
9d8d5786 1379 int i, rc;
b0c632db 1380 char debug_name[16];
f6c137ff 1381 static unsigned long sca_offset;
b0c632db 1382
e08b9637
CO		 1383 rc = -EINVAL;
1384#ifdef CONFIG_KVM_S390_UCONTROL
1385 if (type & ~KVM_VM_S390_UCONTROL)
1386 goto out_err;
1387 if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
1388 goto out_err;
1389#else
1390 if (type)
1391 goto out_err;
1392#endif
1393
b0c632db
HC		 1394 rc = s390_enable_sie();
1395 if (rc)
d89f5eff 1396 goto out_err;
b0c632db 1397
b290411a
CO		 1398 rc = -ENOMEM;
1399
7d0a5e62
JF		 1400 ratelimit_state_init(&kvm->arch.sthyi_limit, 5 * HZ, 500);
1401
7d43bafc 1402 kvm->arch.use_esca = 0; /* start with basic SCA */
76a6dd72
DH		 1403 if (!sclp.has_64bscao)
1404 alloc_flags |= GFP_DMA;
5e044315 1405 rwlock_init(&kvm->arch.sca_lock);
76a6dd72 1406 kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
b0c632db 1407 if (!kvm->arch.sca)
d89f5eff 1408 goto out_err;
f6c137ff 1409 spin_lock(&kvm_lock);
c5c2c393 1410 sca_offset += 16;
bc784cce 1411 if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
c5c2c393 1412 sca_offset = 0;
bc784cce
ED		 1413 kvm->arch.sca = (struct bsca_block *)
1414 ((char *) kvm->arch.sca + sca_offset);
f6c137ff 1415 spin_unlock(&kvm_lock);
b0c632db
HC		 1416
1417 sprintf(debug_name, "kvm-%u", current->pid);
1418
1cb9cf72 1419 kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
b0c632db 1420 if (!kvm->arch.dbf)
40f5b735 1421 goto out_err;
b0c632db 1422
c54f0d6a
DH		 1423 kvm->arch.sie_page2 =
1424 (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
1425 if (!kvm->arch.sie_page2)
40f5b735 1426 goto out_err;
9d8d5786 1427
fb5bf93f 1428 /* Populate the facility mask initially. */
c54f0d6a 1429 memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list,
94422ee8 1430 S390_ARCH_FAC_LIST_SIZE_BYTE);
9d8d5786
MM		 1431 for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) {
1432 if (i < kvm_s390_fac_list_mask_size())
c54f0d6a 1433 kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i];
9d8d5786 1434 else
c54f0d6a 1435 kvm->arch.model.fac_mask[i] = 0UL;
9d8d5786
MM		 1436 }
1437
981467c9 1438 /* Populate the facility list initially. */
c54f0d6a
DH		 1439 kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
1440 memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask,
981467c9
MM		 1441 S390_ARCH_FAC_LIST_SIZE_BYTE);
1442
95ca2cb5
JF		 1443 set_kvm_facility(kvm->arch.model.fac_mask, 74);
1444 set_kvm_facility(kvm->arch.model.fac_list, 74);
1445
9bb0ec09 1446 kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
37c5f6c8 1447 kvm->arch.model.ibc = sclp.ibc & 0x0fff;
9d8d5786 1448
c54f0d6a 1449 kvm_s390_crypto_init(kvm);
5102ee87 1450
ba5c1e9b 1451 spin_lock_init(&kvm->arch.float_int.lock);
6d3da241
JF		 1452 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1453 INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
8a242234 1454 init_waitqueue_head(&kvm->arch.ipte_wq);
a6b7e459 1455 mutex_init(&kvm->arch.ipte_mutex);
ba5c1e9b 1456
b0c632db 1457 debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
78f26131 1458 VM_EVENT(kvm, 3, "vm created with type %lu", type);
b0c632db 1459
e08b9637
CO		 1460 if (type & KVM_VM_S390_UCONTROL) {
1461 kvm->arch.gmap = NULL;
a3a92c31 1462 kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
e08b9637 1463 } else {
32e6b236
GH		 1464 if (sclp.hamax == U64_MAX)
1465 kvm->arch.mem_limit = TASK_MAX_SIZE;
1466 else
1467 kvm->arch.mem_limit = min_t(unsigned long, TASK_MAX_SIZE,
1468 sclp.hamax + 1);
6ea427bb 1469 kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
e08b9637 1470 if (!kvm->arch.gmap)
40f5b735 1471 goto out_err;
2c70fe44 1472 kvm->arch.gmap->private = kvm;
24eb3a82 1473 kvm->arch.gmap->pfault_enabled = 0;
e08b9637 1474 }
fa6b7fe9
CH		 1475
1476 kvm->arch.css_support = 0;
84223598 1477 kvm->arch.use_irqchip = 0;
72f25020 1478 kvm->arch.epoch = 0;
fa6b7fe9 1479
8ad35755 1480 spin_lock_init(&kvm->arch.start_stop_lock);
a3508fbe 1481 kvm_s390_vsie_init(kvm);
8335713a 1482 KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
8ad35755 1483
d89f5eff 1484 return 0;
40f5b735 1485out_err:
c54f0d6a 1486 free_page((unsigned long)kvm->arch.sie_page2);
598841ca 1487 debug_unregister(kvm->arch.dbf);
7d43bafc 1488 sca_dispose(kvm);
78f26131 1489 KVM_EVENT(3, "creation of vm failed: %d", rc);
d89f5eff 1490 return rc;
b0c632db
HC		 1491}
1492
d329c035
CB		 1493void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1494{
1495 VCPU_EVENT(vcpu, 3, "%s", "free cpu");
ade38c31 1496 trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
67335e63 1497 kvm_s390_clear_local_irqs(vcpu);
3c038e6b 1498 kvm_clear_async_pf_completion_queue(vcpu);
bc784cce 1499 if (!kvm_is_ucontrol(vcpu->kvm))
a6e2f683 1500 sca_del_vcpu(vcpu);
27e0393f
CO		 1501
1502 if (kvm_is_ucontrol(vcpu->kvm))
6ea427bb 1503 gmap_remove(vcpu->arch.gmap);
27e0393f 1504
e6db1d61 1505 if (vcpu->kvm->arch.use_cmma)
b31605c1 1506 kvm_s390_vcpu_unsetup_cmma(vcpu);
d329c035 1507 free_page((unsigned long)(vcpu->arch.sie_block));
b31288fa 1508
6692cef3 1509 kvm_vcpu_uninit(vcpu);
b110feaf 1510 kmem_cache_free(kvm_vcpu_cache, vcpu);
d329c035
CB		 1511}
1512
1513static void kvm_free_vcpus(struct kvm *kvm)
1514{
1515 unsigned int i;
988a2cae 1516 struct kvm_vcpu *vcpu;
d329c035 1517
988a2cae
GN		 1518 kvm_for_each_vcpu(i, vcpu, kvm)
1519 kvm_arch_vcpu_destroy(vcpu);
1520
1521 mutex_lock(&kvm->lock);
1522 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
1523 kvm->vcpus[i] = NULL;
1524
1525 atomic_set(&kvm->online_vcpus, 0);
1526 mutex_unlock(&kvm->lock);
d329c035
CB		 1527}
1528
b0c632db
HC		 1529void kvm_arch_destroy_vm(struct kvm *kvm)
1530{
d329c035 1531 kvm_free_vcpus(kvm);
7d43bafc 1532 sca_dispose(kvm);
d329c035 1533 debug_unregister(kvm->arch.dbf);
c54f0d6a 1534 free_page((unsigned long)kvm->arch.sie_page2);
27e0393f 1535 if (!kvm_is_ucontrol(kvm))
6ea427bb 1536 gmap_remove(kvm->arch.gmap);
841b91c5 1537 kvm_s390_destroy_adapters(kvm);
67335e63 1538 kvm_s390_clear_float_irqs(kvm);
a3508fbe 1539 kvm_s390_vsie_destroy(kvm);
8335713a 1540 KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
b0c632db
HC		 1541}
1542
1543/* Section: vcpu related */
dafd032a
DD		 1544static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
1545{
6ea427bb 1546 vcpu->arch.gmap = gmap_create(current->mm, -1UL);
dafd032a
DD		 1547 if (!vcpu->arch.gmap)
1548 return -ENOMEM;
1549 vcpu->arch.gmap->private = vcpu->kvm;
1550
1551 return 0;
1552}
1553
a6e2f683
ED		 1554static void sca_del_vcpu(struct kvm_vcpu *vcpu)
1555{
5e044315 1556 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 1557 if (vcpu->kvm->arch.use_esca) {
1558 struct esca_block *sca = vcpu->kvm->arch.sca;
a6e2f683 1559
7d43bafc 1560 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
10ce32d5 1561 sca->cpu[vcpu->vcpu_id].sda = 0;
7d43bafc
ED		 1562 } else {
1563 struct bsca_block *sca = vcpu->kvm->arch.sca;
1564
1565 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
10ce32d5 1566 sca->cpu[vcpu->vcpu_id].sda = 0;
7d43bafc 1567 }
5e044315 1568 read_unlock(&vcpu->kvm->arch.sca_lock);
a6e2f683
ED		 1569}
1570
eaa78f34 1571static void sca_add_vcpu(struct kvm_vcpu *vcpu)
a6e2f683 1572{
eaa78f34
DH		 1573 read_lock(&vcpu->kvm->arch.sca_lock);
1574 if (vcpu->kvm->arch.use_esca) {
1575 struct esca_block *sca = vcpu->kvm->arch.sca;
7d43bafc 1576
eaa78f34 1577 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
7d43bafc
ED		 1578 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
1579 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
25508824 1580 vcpu->arch.sie_block->ecb2 |= 0x04U;
eaa78f34 1581 set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
7d43bafc 1582 } else {
eaa78f34 1583 struct bsca_block *sca = vcpu->kvm->arch.sca;
a6e2f683 1584
eaa78f34 1585 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
7d43bafc
ED		 1586 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
1587 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
eaa78f34 1588 set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
7d43bafc 1589 }
eaa78f34 1590 read_unlock(&vcpu->kvm->arch.sca_lock);
5e044315
ED		 1591}
1592
1593/* Basic SCA to Extended SCA data copy routines */
1594static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
1595{
1596 d->sda = s->sda;
1597 d->sigp_ctrl.c = s->sigp_ctrl.c;
1598 d->sigp_ctrl.scn = s->sigp_ctrl.scn;
1599}
1600
1601static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
1602{
1603 int i;
1604
1605 d->ipte_control = s->ipte_control;
1606 d->mcn[0] = s->mcn;
1607 for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
1608 sca_copy_entry(&d->cpu[i], &s->cpu[i]);
1609}
1610
1611static int sca_switch_to_extended(struct kvm *kvm)
1612{
1613 struct bsca_block *old_sca = kvm->arch.sca;
1614 struct esca_block *new_sca;
1615 struct kvm_vcpu *vcpu;
1616 unsigned int vcpu_idx;
1617 u32 scaol, scaoh;
1618
1619 new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
1620 if (!new_sca)
1621 return -ENOMEM;
1622
1623 scaoh = (u32)((u64)(new_sca) >> 32);
1624 scaol = (u32)(u64)(new_sca) & ~0x3fU;
1625
1626 kvm_s390_vcpu_block_all(kvm);
1627 write_lock(&kvm->arch.sca_lock);
1628
1629 sca_copy_b_to_e(new_sca, old_sca);
1630
1631 kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
1632 vcpu->arch.sie_block->scaoh = scaoh;
1633 vcpu->arch.sie_block->scaol = scaol;
1634 vcpu->arch.sie_block->ecb2 |= 0x04U;
1635 }
1636 kvm->arch.sca = new_sca;
1637 kvm->arch.use_esca = 1;
1638
1639 write_unlock(&kvm->arch.sca_lock);
1640 kvm_s390_vcpu_unblock_all(kvm);
1641
1642 free_page((unsigned long)old_sca);
1643
8335713a
CB		 1644 VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
1645 old_sca, kvm->arch.sca);
5e044315 1646 return 0;
a6e2f683
ED		 1647}
1648
1649static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
1650{
5e044315
ED		 1651 int rc;
1652
1653 if (id < KVM_S390_BSCA_CPU_SLOTS)
1654 return true;
76a6dd72 1655 if (!sclp.has_esca || !sclp.has_64bscao)
5e044315
ED		 1656 return false;
1657
1658 mutex_lock(&kvm->lock);
1659 rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
1660 mutex_unlock(&kvm->lock);
1661
1662 return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
a6e2f683
ED		 1663}
1664
b0c632db
HC		 1665int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1666{
3c038e6b
DD		 1667 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
1668 kvm_clear_async_pf_completion_queue(vcpu);
59674c1a
CB		 1669 vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
1670 KVM_SYNC_GPRS |
9eed0735 1671 KVM_SYNC_ACRS |
b028ee3e
DH		 1672 KVM_SYNC_CRS |
1673 KVM_SYNC_ARCH0 |
1674 KVM_SYNC_PFAULT;
c6e5f166
FZ		 1675 if (test_kvm_facility(vcpu->kvm, 64))
1676 vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
f6aa6dc4
DH		 1677 /* fprs can be synchronized via vrs, even if the guest has no vx. With
1678 * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
1679 */
1680 if (MACHINE_HAS_VX)
68c55750 1681 vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
6fd8e67d
DH		 1682 else
1683 vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
dafd032a
DD		 1684
1685 if (kvm_is_ucontrol(vcpu->kvm))
1686 return __kvm_ucontrol_vcpu_init(vcpu);
1687
b0c632db
HC		 1688 return 0;
1689}
1690
db0758b2
DH		 1691/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
1692static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1693{
1694 WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
9c23a131 1695 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2 1696 vcpu->arch.cputm_start = get_tod_clock_fast();
9c23a131 1697 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 1698}
1699
1700/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
1701static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1702{
1703 WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
9c23a131 1704 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 1705 vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
1706 vcpu->arch.cputm_start = 0;
9c23a131 1707 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 1708}
1709
1710/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
1711static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1712{
1713 WARN_ON_ONCE(vcpu->arch.cputm_enabled);
1714 vcpu->arch.cputm_enabled = true;
1715 __start_cpu_timer_accounting(vcpu);
1716}
1717
1718/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
1719static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1720{
1721 WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
1722 __stop_cpu_timer_accounting(vcpu);
1723 vcpu->arch.cputm_enabled = false;
1724}
1725
1726static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1727{
1728 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
1729 __enable_cpu_timer_accounting(vcpu);
1730 preempt_enable();
1731}
1732
1733static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
1734{
1735 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
1736 __disable_cpu_timer_accounting(vcpu);
1737 preempt_enable();
1738}
1739
4287f247
DH		 1740/* set the cpu timer - may only be called from the VCPU thread itself */
1741void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
1742{
db0758b2 1743 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
9c23a131 1744 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 1745 if (vcpu->arch.cputm_enabled)
1746 vcpu->arch.cputm_start = get_tod_clock_fast();
4287f247 1747 vcpu->arch.sie_block->cputm = cputm;
9c23a131 1748 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2 1749 preempt_enable();
4287f247
DH		 1750}
1751
db0758b2 1752/* update and get the cpu timer - can also be called from other VCPU threads */
4287f247
DH		 1753__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
1754{
9c23a131 1755 unsigned int seq;
db0758b2 1756 __u64 value;
db0758b2
DH		 1757
1758 if (unlikely(!vcpu->arch.cputm_enabled))
1759 return vcpu->arch.sie_block->cputm;
1760
9c23a131
DH		 1761 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
1762 do {
1763 seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
1764 /*
1765 * If the writer would ever execute a read in the critical
1766 * section, e.g. in irq context, we have a deadlock.
1767 */
1768 WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu);
1769 value = vcpu->arch.sie_block->cputm;
1770 /* if cputm_start is 0, accounting is being started/stopped */
1771 if (likely(vcpu->arch.cputm_start))
1772 value -= get_tod_clock_fast() - vcpu->arch.cputm_start;
1773 } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1));
1774 preempt_enable();
db0758b2 1775 return value;
4287f247
DH		 1776}
1777
b0c632db
HC		 1778void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1779{
9977e886 1780 /* Save host register state */
d0164ee2 1781 save_fpu_regs();
9abc2a08
DH		 1782 vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
1783 vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
9977e886 1784
6fd8e67d
DH		 1785 if (MACHINE_HAS_VX)
1786 current->thread.fpu.regs = vcpu->run->s.regs.vrs;
1787 else
1788 current->thread.fpu.regs = vcpu->run->s.regs.fprs;
9abc2a08 1789 current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
9977e886 1790 if (test_fp_ctl(current->thread.fpu.fpc))
96b2d7a8 1791 /* User space provided an invalid FPC, let's clear it */
9977e886
HB		 1792 current->thread.fpu.fpc = 0;
1793
1794 save_access_regs(vcpu->arch.host_acrs);
59674c1a 1795 restore_access_regs(vcpu->run->s.regs.acrs);
37d9df98 1796 gmap_enable(vcpu->arch.enabled_gmap);
805de8f4 1797 atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
5ebda316 1798 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
db0758b2 1799 __start_cpu_timer_accounting(vcpu);
01a745ac 1800 vcpu->cpu = cpu;
b0c632db
HC		 1801}
1802
1803void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1804{
01a745ac 1805 vcpu->cpu = -1;
5ebda316 1806 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
db0758b2 1807 __stop_cpu_timer_accounting(vcpu);
805de8f4 1808 atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
37d9df98
DH		 1809 vcpu->arch.enabled_gmap = gmap_get_enabled();
1810 gmap_disable(vcpu->arch.enabled_gmap);
9977e886 1811
9abc2a08 1812 /* Save guest register state */
d0164ee2 1813 save_fpu_regs();
9abc2a08 1814 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
9977e886 1815
9abc2a08
DH		 1816 /* Restore host register state */
1817 current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
1818 current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
9977e886
HB		 1819
1820 save_access_regs(vcpu->run->s.regs.acrs);
b0c632db
HC		 1821 restore_access_regs(vcpu->arch.host_acrs);
1822}
1823
1824static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
1825{
1826 /* this equals initial cpu reset in pop, but we don't switch to ESA */
1827 vcpu->arch.sie_block->gpsw.mask = 0UL;
1828 vcpu->arch.sie_block->gpsw.addr = 0UL;
8d26cf7b 1829 kvm_s390_set_prefix(vcpu, 0);
4287f247 1830 kvm_s390_set_cpu_timer(vcpu, 0);
b0c632db
HC		 1831 vcpu->arch.sie_block->ckc = 0UL;
1832 vcpu->arch.sie_block->todpr = 0;
1833 memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
1834 vcpu->arch.sie_block->gcr[0] = 0xE0UL;
1835 vcpu->arch.sie_block->gcr[14] = 0xC2000000UL;
9abc2a08
DH		 1836 /* make sure the new fpc will be lazily loaded */
1837 save_fpu_regs();
1838 current->thread.fpu.fpc = 0;
b0c632db 1839 vcpu->arch.sie_block->gbea = 1;
672550fb 1840 vcpu->arch.sie_block->pp = 0;
3c038e6b
DD		 1841 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
1842 kvm_clear_async_pf_completion_queue(vcpu);
6352e4d2
DH		 1843 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
1844 kvm_s390_vcpu_stop(vcpu);
2ed10cc1 1845 kvm_s390_clear_local_irqs(vcpu);
b0c632db
HC		 1846}
1847
31928aa5 1848void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
42897d86 1849{
72f25020 1850 mutex_lock(&vcpu->kvm->lock);
fdf03650 1851 preempt_disable();
72f25020 1852 vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
fdf03650 1853 preempt_enable();
72f25020 1854 mutex_unlock(&vcpu->kvm->lock);
25508824 1855 if (!kvm_is_ucontrol(vcpu->kvm)) {
dafd032a 1856 vcpu->arch.gmap = vcpu->kvm->arch.gmap;
eaa78f34 1857 sca_add_vcpu(vcpu);
25508824 1858 }
6502a34c
DH		 1859 if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
1860 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
37d9df98
DH		 1861 /* make vcpu_load load the right gmap on the first trigger */
1862 vcpu->arch.enabled_gmap = vcpu->arch.gmap;
42897d86
MT		 1863}
1864
5102ee87
TK		 1865static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
1866{
9d8d5786 1867 if (!test_kvm_facility(vcpu->kvm, 76))
5102ee87
TK		 1868 return;
1869
a374e892
TK		 1870 vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);
1871
1872 if (vcpu->kvm->arch.crypto.aes_kw)
1873 vcpu->arch.sie_block->ecb3 |= ECB3_AES;
1874 if (vcpu->kvm->arch.crypto.dea_kw)
1875 vcpu->arch.sie_block->ecb3 |= ECB3_DEA;
1876
5102ee87
TK		 1877 vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
1878}
1879
b31605c1
DD		 1880void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
1881{
1882 free_page(vcpu->arch.sie_block->cbrlo);
1883 vcpu->arch.sie_block->cbrlo = 0;
1884}
1885
1886int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
1887{
1888 vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
1889 if (!vcpu->arch.sie_block->cbrlo)
1890 return -ENOMEM;
1891
1892 vcpu->arch.sie_block->ecb2 |= 0x80;
1893 vcpu->arch.sie_block->ecb2 &= ~0x08;
1894 return 0;
1895}
1896
91520f1a
MM		 1897static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
1898{
1899 struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
1900
91520f1a 1901 vcpu->arch.sie_block->ibc = model->ibc;
80bc79dc 1902 if (test_kvm_facility(vcpu->kvm, 7))
c54f0d6a 1903 vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
91520f1a
MM		 1904}
1905
b0c632db
HC		 1906int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1907{
b31605c1 1908 int rc = 0;
b31288fa 1909
9e6dabef
CH		 1910 atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
1911 CPUSTAT_SM |
a4a4f191
GH		 1912 CPUSTAT_STOPPED);
1913
53df84f8 1914 if (test_kvm_facility(vcpu->kvm, 78))
805de8f4 1915 atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags);
53df84f8 1916 else if (test_kvm_facility(vcpu->kvm, 8))
805de8f4 1917 atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);
a4a4f191 1918
91520f1a
MM		 1919 kvm_s390_vcpu_setup_model(vcpu);
1920
bdab09f3
DH		 1921 /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
1922 if (MACHINE_HAS_ESOP)
1923 vcpu->arch.sie_block->ecb |= 0x02;
bd50e8ec
DH		 1924 if (test_kvm_facility(vcpu->kvm, 9))
1925 vcpu->arch.sie_block->ecb |= 0x04;
f597d24e 1926 if (test_kvm_facility(vcpu->kvm, 73))
7feb6bb8
MM		 1927 vcpu->arch.sie_block->ecb |= 0x10;
1928
873b425e 1929 if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
d6af0b49 1930 vcpu->arch.sie_block->ecb2 |= 0x08;
48ee7d3a
DH		 1931 vcpu->arch.sie_block->eca = 0x1002000U;
1932 if (sclp.has_cei)
1933 vcpu->arch.sie_block->eca |= 0x80000000U;
11ad65b7
DH		 1934 if (sclp.has_ib)
1935 vcpu->arch.sie_block->eca |= 0x40000000U;
37c5f6c8 1936 if (sclp.has_siif)
217a4406 1937 vcpu->arch.sie_block->eca |= 1;
37c5f6c8 1938 if (sclp.has_sigpif)
ea5f4969 1939 vcpu->arch.sie_block->eca |= 0x10000000U;
c6e5f166
FZ		 1940 if (test_kvm_facility(vcpu->kvm, 64))
1941 vcpu->arch.sie_block->ecb3 |= 0x01;
18280d8b 1942 if (test_kvm_facility(vcpu->kvm, 129)) {
13211ea7
EF		 1943 vcpu->arch.sie_block->eca |= 0x00020000;
1944 vcpu->arch.sie_block->ecd |= 0x20000000;
1945 }
c6e5f166 1946 vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
492d8642 1947 vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
5a5e6536 1948
e6db1d61 1949 if (vcpu->kvm->arch.use_cmma) {
b31605c1
DD		 1950 rc = kvm_s390_vcpu_setup_cmma(vcpu);
1951 if (rc)
1952 return rc;
b31288fa 1953 }
0ac96caf 1954 hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ca872302 1955 vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
9d8d5786 1956
5102ee87
TK		 1957 kvm_s390_vcpu_crypto_setup(vcpu);
1958
b31605c1 1959 return rc;
b0c632db
HC		 1960}
1961
1962struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1963 unsigned int id)
1964{
4d47555a 1965 struct kvm_vcpu *vcpu;
7feb6bb8 1966 struct sie_page *sie_page;
4d47555a
CO		 1967 int rc = -EINVAL;
1968
4215825e 1969 if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
4d47555a
CO		 1970 goto out;
1971
1972 rc = -ENOMEM;
b0c632db 1973
b110feaf 1974 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
b0c632db 1975 if (!vcpu)
4d47555a 1976 goto out;
b0c632db 1977
7feb6bb8
MM		 1978 sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
1979 if (!sie_page)
b0c632db
HC		 1980 goto out_free_cpu;
1981
7feb6bb8
MM		 1982 vcpu->arch.sie_block = &sie_page->sie_block;
1983 vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
1984
efed1104
DH		 1985 /* the real guest size will always be smaller than msl */
1986 vcpu->arch.sie_block->mso = 0;
1987 vcpu->arch.sie_block->msl = sclp.hamax;
1988
b0c632db 1989 vcpu->arch.sie_block->icpua = id;
ba5c1e9b 1990 spin_lock_init(&vcpu->arch.local_int.lock);
ba5c1e9b 1991 vcpu->arch.local_int.float_int = &kvm->arch.float_int;
d0321a24 1992 vcpu->arch.local_int.wq = &vcpu->wq;
5288fbf0 1993 vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags;
9c23a131 1994 seqcount_init(&vcpu->arch.cputm_seqcount);
ba5c1e9b 1995
b0c632db
HC		 1996 rc = kvm_vcpu_init(vcpu, kvm, id);
1997 if (rc)
9abc2a08 1998 goto out_free_sie_block;
8335713a 1999 VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu,
b0c632db 2000 vcpu->arch.sie_block);
ade38c31 2001 trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block);
b0c632db 2002
b0c632db 2003 return vcpu;
7b06bf2f
WY		 2004out_free_sie_block:
2005 free_page((unsigned long)(vcpu->arch.sie_block));
b0c632db 2006out_free_cpu:
b110feaf 2007 kmem_cache_free(kvm_vcpu_cache, vcpu);
4d47555a 2008out:
b0c632db
HC		 2009 return ERR_PTR(rc);
2010}
2011
b0c632db
HC		 2012int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
2013{
9a022067 2014 return kvm_s390_vcpu_has_irq(vcpu, 0);
b0c632db
HC		 2015}
2016
27406cd5 2017void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
49b99e1e 2018{
805de8f4 2019 atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
61a6df54 2020 exit_sie(vcpu);
49b99e1e
CB		 2021}
2022
27406cd5 2023void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
49b99e1e 2024{
805de8f4 2025 atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
49b99e1e
CB		 2026}
2027
8e236546
CB		 2028static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
2029{
805de8f4 2030 atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
61a6df54 2031 exit_sie(vcpu);
8e236546
CB		 2032}
2033
2034static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
2035{
9bf9fde2 2036 atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
8e236546
CB		 2037}
2038
49b99e1e
CB		 2039/*
2040 * Kick a guest cpu out of SIE and wait until SIE is not running.
2041 * If the CPU is not running (e.g. waiting as idle) the function will
2042 * return immediately. */
2043void exit_sie(struct kvm_vcpu *vcpu)
2044{
805de8f4 2045 atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
49b99e1e
CB		 2046 while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
2047 cpu_relax();
2048}
2049
8e236546
CB		 2050/* Kick a guest cpu out of SIE to process a request synchronously */
2051void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
49b99e1e 2052{
8e236546
CB		 2053 kvm_make_request(req, vcpu);
2054 kvm_s390_vcpu_request(vcpu);
49b99e1e
CB		 2055}
2056
414d3b07
MS		 2057static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
2058 unsigned long end)
2c70fe44 2059{
2c70fe44
CB		 2060 struct kvm *kvm = gmap->private;
2061 struct kvm_vcpu *vcpu;
414d3b07
MS		 2062 unsigned long prefix;
2063 int i;
2c70fe44 2064
65d0b0d4
DH		 2065 if (gmap_is_shadow(gmap))
2066 return;
414d3b07
MS		 2067 if (start >= 1UL << 31)
2068 /* We are only interested in prefix pages */
2069 return;
2c70fe44
CB		 2070 kvm_for_each_vcpu(i, vcpu, kvm) {
2071 /* match against both prefix pages */
414d3b07
MS		 2072 prefix = kvm_s390_get_prefix(vcpu);
2073 if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
2074 VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
2075 start, end);
8e236546 2076 kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
2c70fe44
CB		 2077 }
2078 }
2079}
2080
b6d33834
CD		 2081int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
2082{
2083 /* kvm common code refers to this, but never calls it */
2084 BUG();
2085 return 0;
2086}
2087
14eebd91
CO		 2088static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
2089 struct kvm_one_reg *reg)
2090{
2091 int r = -EINVAL;
2092
2093 switch (reg->id) {
29b7c71b
CO		 2094 case KVM_REG_S390_TODPR:
2095 r = put_user(vcpu->arch.sie_block->todpr,
2096 (u32 __user *)reg->addr);
2097 break;
2098 case KVM_REG_S390_EPOCHDIFF:
2099 r = put_user(vcpu->arch.sie_block->epoch,
2100 (u64 __user *)reg->addr);
2101 break;
46a6dd1c 2102 case KVM_REG_S390_CPU_TIMER:
4287f247 2103 r = put_user(kvm_s390_get_cpu_timer(vcpu),
46a6dd1c
J		 2104 (u64 __user *)reg->addr);
2105 break;
2106 case KVM_REG_S390_CLOCK_COMP:
2107 r = put_user(vcpu->arch.sie_block->ckc,
2108 (u64 __user *)reg->addr);
2109 break;
536336c2
DD		 2110 case KVM_REG_S390_PFTOKEN:
2111 r = put_user(vcpu->arch.pfault_token,
2112 (u64 __user *)reg->addr);
2113 break;
2114 case KVM_REG_S390_PFCOMPARE:
2115 r = put_user(vcpu->arch.pfault_compare,
2116 (u64 __user *)reg->addr);
2117 break;
2118 case KVM_REG_S390_PFSELECT:
2119 r = put_user(vcpu->arch.pfault_select,
2120 (u64 __user *)reg->addr);
2121 break;
672550fb
CB		 2122 case KVM_REG_S390_PP:
2123 r = put_user(vcpu->arch.sie_block->pp,
2124 (u64 __user *)reg->addr);
2125 break;
afa45ff5
CB		 2126 case KVM_REG_S390_GBEA:
2127 r = put_user(vcpu->arch.sie_block->gbea,
2128 (u64 __user *)reg->addr);
2129 break;
14eebd91
CO		 2130 default:
2131 break;
2132 }
2133
2134 return r;
2135}
2136
2137static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
2138 struct kvm_one_reg *reg)
2139{
2140 int r = -EINVAL;
4287f247 2141 __u64 val;
14eebd91
CO		 2142
2143 switch (reg->id) {
29b7c71b
CO		 2144 case KVM_REG_S390_TODPR:
2145 r = get_user(vcpu->arch.sie_block->todpr,
2146 (u32 __user *)reg->addr);
2147 break;
2148 case KVM_REG_S390_EPOCHDIFF:
2149 r = get_user(vcpu->arch.sie_block->epoch,
2150 (u64 __user *)reg->addr);
2151 break;
46a6dd1c 2152 case KVM_REG_S390_CPU_TIMER:
4287f247
DH		 2153 r = get_user(val, (u64 __user *)reg->addr);
2154 if (!r)
2155 kvm_s390_set_cpu_timer(vcpu, val);
46a6dd1c
J		 2156 break;
2157 case KVM_REG_S390_CLOCK_COMP:
2158 r = get_user(vcpu->arch.sie_block->ckc,
2159 (u64 __user *)reg->addr);
2160 break;
536336c2
DD		 2161 case KVM_REG_S390_PFTOKEN:
2162 r = get_user(vcpu->arch.pfault_token,
2163 (u64 __user *)reg->addr);
9fbd8082
DH		 2164 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
2165 kvm_clear_async_pf_completion_queue(vcpu);
536336c2
DD		 2166 break;
2167 case KVM_REG_S390_PFCOMPARE:
2168 r = get_user(vcpu->arch.pfault_compare,
2169 (u64 __user *)reg->addr);
2170 break;
2171 case KVM_REG_S390_PFSELECT:
2172 r = get_user(vcpu->arch.pfault_select,
2173 (u64 __user *)reg->addr);
2174 break;
672550fb
CB		 2175 case KVM_REG_S390_PP:
2176 r = get_user(vcpu->arch.sie_block->pp,
2177 (u64 __user *)reg->addr);
2178 break;
afa45ff5
CB		 2179 case KVM_REG_S390_GBEA:
2180 r = get_user(vcpu->arch.sie_block->gbea,
2181 (u64 __user *)reg->addr);
2182 break;
14eebd91
CO		 2183 default:
2184 break;
2185 }
2186
2187 return r;
2188}
b6d33834 2189
b0c632db
HC		 2190static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
2191{
b0c632db 2192 kvm_s390_vcpu_initial_reset(vcpu);
b0c632db
HC		 2193 return 0;
2194}
2195
2196int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2197{
5a32c1af 2198 memcpy(&vcpu->run->s.regs.gprs, &regs->gprs, sizeof(regs->gprs));
b0c632db
HC		 2199 return 0;
2200}
2201
2202int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2203{
5a32c1af 2204 memcpy(&regs->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
b0c632db
HC		 2205 return 0;
2206}
2207
2208int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2209 struct kvm_sregs *sregs)
2210{
59674c1a 2211 memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
b0c632db 2212 memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
59674c1a 2213 restore_access_regs(vcpu->run->s.regs.acrs);
b0c632db
HC		 2214 return 0;
2215}
2216
2217int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2218 struct kvm_sregs *sregs)
2219{
59674c1a 2220 memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
b0c632db 2221 memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
b0c632db
HC		 2222 return 0;
2223}
2224
2225int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2226{
9abc2a08
DH		 2227 /* make sure the new values will be lazily loaded */
2228 save_fpu_regs();
4725c860
MS		 2229 if (test_fp_ctl(fpu->fpc))
2230 return -EINVAL;
9abc2a08
DH		 2231 current->thread.fpu.fpc = fpu->fpc;
2232 if (MACHINE_HAS_VX)
2233 convert_fp_to_vx(current->thread.fpu.vxrs, (freg_t *)fpu->fprs);
2234 else
2235 memcpy(current->thread.fpu.fprs, &fpu->fprs, sizeof(fpu->fprs));
b0c632db
HC		 2236 return 0;
2237}
2238
2239int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2240{
9abc2a08
DH		 2241 /* make sure we have the latest values */
2242 save_fpu_regs();
2243 if (MACHINE_HAS_VX)
2244 convert_vx_to_fp((freg_t *)fpu->fprs, current->thread.fpu.vxrs);
2245 else
2246 memcpy(fpu->fprs, current->thread.fpu.fprs, sizeof(fpu->fprs));
2247 fpu->fpc = current->thread.fpu.fpc;
b0c632db
HC		 2248 return 0;
2249}
2250
2251static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
2252{
2253 int rc = 0;
2254
7a42fdc2 2255 if (!is_vcpu_stopped(vcpu))
b0c632db 2256 rc = -EBUSY;
d7b0b5eb
CO		 2257 else {
2258 vcpu->run->psw_mask = psw.mask;
2259 vcpu->run->psw_addr = psw.addr;
2260 }
b0c632db
HC		 2261 return rc;
2262}
2263
2264int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2265 struct kvm_translation *tr)
2266{
2267 return -EINVAL; /* not implemented yet */
2268}
2269
27291e21
DH		 2270#define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
2271 KVM_GUESTDBG_USE_HW_BP | \
2272 KVM_GUESTDBG_ENABLE)
2273
d0bfb940
JK		 2274int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
2275 struct kvm_guest_debug *dbg)
b0c632db 2276{
27291e21
DH		 2277 int rc = 0;
2278
2279 vcpu->guest_debug = 0;
2280 kvm_s390_clear_bp_data(vcpu);
2281
2de3bfc2 2282 if (dbg->control & ~VALID_GUESTDBG_FLAGS)
27291e21 2283 return -EINVAL;
89b5b4de
DH		 2284 if (!sclp.has_gpere)
2285 return -EINVAL;
27291e21
DH		 2286
2287 if (dbg->control & KVM_GUESTDBG_ENABLE) {
2288 vcpu->guest_debug = dbg->control;
2289 /* enforce guest PER */
805de8f4 2290 atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
27291e21
DH		 2291
2292 if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
2293 rc = kvm_s390_import_bp_data(vcpu, dbg);
2294 } else {
805de8f4 2295 atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
27291e21
DH		 2296 vcpu->arch.guestdbg.last_bp = 0;
2297 }
2298
2299 if (rc) {
2300 vcpu->guest_debug = 0;
2301 kvm_s390_clear_bp_data(vcpu);
805de8f4 2302 atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
27291e21
DH		 2303 }
2304
2305 return rc;
b0c632db
HC		 2306}
2307
62d9f0db
MT		 2308int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2309 struct kvm_mp_state *mp_state)
2310{
6352e4d2
DH		 2311 /* CHECK_STOP and LOAD are not supported yet */
2312 return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
2313 KVM_MP_STATE_OPERATING;
62d9f0db
MT		 2314}
2315
2316int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2317 struct kvm_mp_state *mp_state)
2318{
6352e4d2
DH		 2319 int rc = 0;
2320
2321 /* user space knows about this interface - let it control the state */
2322 vcpu->kvm->arch.user_cpu_state_ctrl = 1;
2323
2324 switch (mp_state->mp_state) {
2325 case KVM_MP_STATE_STOPPED:
2326 kvm_s390_vcpu_stop(vcpu);
2327 break;
2328 case KVM_MP_STATE_OPERATING:
2329 kvm_s390_vcpu_start(vcpu);
2330 break;
2331 case KVM_MP_STATE_LOAD:
2332 case KVM_MP_STATE_CHECK_STOP:
2333 /* fall through - CHECK_STOP and LOAD are not supported yet */
2334 default:
2335 rc = -ENXIO;
2336 }
2337
2338 return rc;
62d9f0db
MT		 2339}
2340
8ad35755
DH		 2341static bool ibs_enabled(struct kvm_vcpu *vcpu)
2342{
2343 return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS;
2344}
2345
2c70fe44
CB		 2346static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
2347{
8ad35755 2348retry:
8e236546 2349 kvm_s390_vcpu_request_handled(vcpu);
586b7ccd
CB		 2350 if (!vcpu->requests)
2351 return 0;
2c70fe44
CB		 2352 /*
2353 * We use MMU_RELOAD just to re-arm the ipte notifier for the
b2d73b2a 2354 * guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
2c70fe44
CB		 2355 * This ensures that the ipte instruction for this request has
2356 * already finished. We might race against a second unmapper that
2357 * wants to set the blocking bit. Lets just retry the request loop.
2358 */
8ad35755 2359 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
2c70fe44 2360 int rc;
b2d73b2a
MS		 2361 rc = gmap_mprotect_notify(vcpu->arch.gmap,
2362 kvm_s390_get_prefix(vcpu),
2363 PAGE_SIZE * 2, PROT_WRITE);
2c70fe44
CB		 2364 if (rc)
2365 return rc;
8ad35755 2366 goto retry;
2c70fe44 2367 }
8ad35755 2368
d3d692c8
DH		 2369 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
2370 vcpu->arch.sie_block->ihcpu = 0xffff;
2371 goto retry;
2372 }
2373
8ad35755
DH		 2374 if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
2375 if (!ibs_enabled(vcpu)) {
2376 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
805de8f4 2377 atomic_or(CPUSTAT_IBS,
8ad35755
DH		 2378 &vcpu->arch.sie_block->cpuflags);
2379 }
2380 goto retry;
2c70fe44 2381 }
8ad35755
DH		 2382
2383 if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
2384 if (ibs_enabled(vcpu)) {
2385 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
805de8f4 2386 atomic_andnot(CPUSTAT_IBS,
8ad35755
DH		 2387 &vcpu->arch.sie_block->cpuflags);
2388 }
2389 goto retry;
2390 }
2391
6502a34c
DH		 2392 if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
2393 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
2394 goto retry;
2395 }
2396
0759d068
DH		 2397 /* nothing to do, just clear the request */
2398 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
2399
2c70fe44
CB		 2400 return 0;
2401}
2402
25ed1675
DH		 2403void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod)
2404{
2405 struct kvm_vcpu *vcpu;
2406 int i;
2407
2408 mutex_lock(&kvm->lock);
2409 preempt_disable();
2410 kvm->arch.epoch = tod - get_tod_clock();
2411 kvm_s390_vcpu_block_all(kvm);
2412 kvm_for_each_vcpu(i, vcpu, kvm)
2413 vcpu->arch.sie_block->epoch = kvm->arch.epoch;
2414 kvm_s390_vcpu_unblock_all(kvm);
2415 preempt_enable();
2416 mutex_unlock(&kvm->lock);
2417}
2418
fa576c58
TH		 2419/**
2420 * kvm_arch_fault_in_page - fault-in guest page if necessary
2421 * @vcpu: The corresponding virtual cpu
2422 * @gpa: Guest physical address
2423 * @writable: Whether the page should be writable or not
2424 *
2425 * Make sure that a guest page has been faulted-in on the host.
2426 *
2427 * Return: Zero on success, negative error code otherwise.
2428 */
2429long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
24eb3a82 2430{
527e30b4
MS		 2431 return gmap_fault(vcpu->arch.gmap, gpa,
2432 writable ? FAULT_FLAG_WRITE : 0);
24eb3a82
DD		 2433}
2434
3c038e6b
DD		 2435static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
2436 unsigned long token)
2437{
2438 struct kvm_s390_interrupt inti;
383d0b05 2439 struct kvm_s390_irq irq;
3c038e6b
DD		 2440
2441 if (start_token) {
383d0b05
JF		 2442 irq.u.ext.ext_params2 = token;
2443 irq.type = KVM_S390_INT_PFAULT_INIT;
2444 WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
3c038e6b
DD		 2445 } else {
2446 inti.type = KVM_S390_INT_PFAULT_DONE;
383d0b05 2447 inti.parm64 = token;
3c038e6b
DD		 2448 WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
2449 }
2450}
2451
2452void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
2453 struct kvm_async_pf *work)
2454{
2455 trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
2456 __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
2457}
2458
2459void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
2460 struct kvm_async_pf *work)
2461{
2462 trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
2463 __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
2464}
2465
2466void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
2467 struct kvm_async_pf *work)
2468{
2469 /* s390 will always inject the page directly */
2470}
2471
2472bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
2473{
2474 /*
2475 * s390 will always inject the page directly,
2476 * but we still want check_async_completion to cleanup
2477 */
2478 return true;
2479}
2480
2481static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
2482{
2483 hva_t hva;
2484 struct kvm_arch_async_pf arch;
2485 int rc;
2486
2487 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
2488 return 0;
2489 if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
2490 vcpu->arch.pfault_compare)
2491 return 0;
2492 if (psw_extint_disabled(vcpu))
2493 return 0;
9a022067 2494 if (kvm_s390_vcpu_has_irq(vcpu, 0))
3c038e6b
DD		 2495 return 0;
2496 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
2497 return 0;
2498 if (!vcpu->arch.gmap->pfault_enabled)
2499 return 0;
2500
81480cc1
HC		 2501 hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
2502 hva += current->thread.gmap_addr & ~PAGE_MASK;
2503 if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
3c038e6b
DD		 2504 return 0;
2505
2506 rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
2507 return rc;
2508}
2509
3fb4c40f 2510static int vcpu_pre_run(struct kvm_vcpu *vcpu)
b0c632db 2511{
3fb4c40f 2512 int rc, cpuflags;
e168bf8d 2513
3c038e6b
DD		 2514 /*
2515 * On s390 notifications for arriving pages will be delivered directly
2516 * to the guest but the house keeping for completed pfaults is
2517 * handled outside the worker.
2518 */
2519 kvm_check_async_pf_completion(vcpu);
2520
7ec7c8c7
CB		 2521 vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
2522 vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
b0c632db
HC		 2523
2524 if (need_resched())
2525 schedule();
2526
d3a73acb 2527 if (test_cpu_flag(CIF_MCCK_PENDING))
71cde587
CB		 2528 s390_handle_mcck();
2529
79395031
JF		 2530 if (!kvm_is_ucontrol(vcpu->kvm)) {
2531 rc = kvm_s390_deliver_pending_interrupts(vcpu);
2532 if (rc)
2533 return rc;
2534 }
0ff31867 2535
2c70fe44
CB		 2536 rc = kvm_s390_handle_requests(vcpu);
2537 if (rc)
2538 return rc;
2539
27291e21
DH		 2540 if (guestdbg_enabled(vcpu)) {
2541 kvm_s390_backup_guest_per_regs(vcpu);
2542 kvm_s390_patch_guest_per_regs(vcpu);
2543 }
2544
b0c632db 2545 vcpu->arch.sie_block->icptcode = 0;
3fb4c40f
TH		 2546 cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
2547 VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
2548 trace_kvm_s390_sie_enter(vcpu, cpuflags);
2b29a9fd 2549
3fb4c40f
TH		 2550 return 0;
2551}
2552
492d8642
TH		 2553static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
2554{
56317920
DH		 2555 struct kvm_s390_pgm_info pgm_info = {
2556 .code = PGM_ADDRESSING,
2557 };
2558 u8 opcode, ilen;
492d8642
TH		 2559 int rc;
2560
2561 VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
2562 trace_kvm_s390_sie_fault(vcpu);
2563
2564 /*
2565 * We want to inject an addressing exception, which is defined as a
2566 * suppressing or terminating exception. However, since we came here
2567 * by a DAT access exception, the PSW still points to the faulting
2568 * instruction since DAT exceptions are nullifying. So we've got
2569 * to look up the current opcode to get the length of the instruction
2570 * to be able to forward the PSW.
2571 */
65977322 2572 rc = read_guest_instr(vcpu, &opcode, 1);
56317920 2573 ilen = insn_length(opcode);
9b0d721a
DH		 2574 if (rc < 0) {
2575 return rc;
2576 } else if (rc) {
2577 /* Instruction-Fetching Exceptions - we can't detect the ilen.
2578 * Forward by arbitrary ilc, injection will take care of
2579 * nullification if necessary.
2580 */
2581 pgm_info = vcpu->arch.pgm;
2582 ilen = 4;
2583 }
56317920
DH		 2584 pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
2585 kvm_s390_forward_psw(vcpu, ilen);
2586 return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
492d8642
TH		 2587}
2588
3fb4c40f
TH		 2589static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
2590{
2b29a9fd
DD		 2591 VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
2592 vcpu->arch.sie_block->icptcode);
2593 trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
2594
27291e21
DH		 2595 if (guestdbg_enabled(vcpu))
2596 kvm_s390_restore_guest_per_regs(vcpu);
2597
7ec7c8c7
CB		 2598 vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
2599 vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
71f116bf
DH		 2600
2601 if (vcpu->arch.sie_block->icptcode > 0) {
2602 int rc = kvm_handle_sie_intercept(vcpu);
2603
2604 if (rc != -EOPNOTSUPP)
2605 return rc;
2606 vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
2607 vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
2608 vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
2609 vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
2610 return -EREMOTE;
2611 } else if (exit_reason != -EFAULT) {
2612 vcpu->stat.exit_null++;
2613 return 0;
210b1607
TH		 2614 } else if (kvm_is_ucontrol(vcpu->kvm)) {
2615 vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
2616 vcpu->run->s390_ucontrol.trans_exc_code =
2617 current->thread.gmap_addr;
2618 vcpu->run->s390_ucontrol.pgm_code = 0x10;
71f116bf 2619 return -EREMOTE;
24eb3a82 2620 } else if (current->thread.gmap_pfault) {
3c038e6b 2621 trace_kvm_s390_major_guest_pfault(vcpu);
24eb3a82 2622 current->thread.gmap_pfault = 0;
71f116bf
DH		 2623 if (kvm_arch_setup_async_pf(vcpu))
2624 return 0;
2625 return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
a76ccff6 2626 }
71f116bf 2627 return vcpu_post_run_fault_in_sie(vcpu);
3fb4c40f
TH		 2628}
2629
2630static int __vcpu_run(struct kvm_vcpu *vcpu)
2631{
2632 int rc, exit_reason;
2633
800c1065
TH		 2634 /*
2635 * We try to hold kvm->srcu during most of vcpu_run (except when run-
2636 * ning the guest), so that memslots (and other stuff) are protected
2637 */
2638 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2639
a76ccff6
TH		 2640 do {
2641 rc = vcpu_pre_run(vcpu);
2642 if (rc)
2643 break;
3fb4c40f 2644
800c1065 2645 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
a76ccff6
TH		 2646 /*
2647 * As PF_VCPU will be used in fault handler, between
2648 * guest_enter and guest_exit should be no uaccess.
2649 */
0097d12e 2650 local_irq_disable();
6edaa530 2651 guest_enter_irqoff();
db0758b2 2652 __disable_cpu_timer_accounting(vcpu);
0097d12e 2653 local_irq_enable();
a76ccff6
TH		 2654 exit_reason = sie64a(vcpu->arch.sie_block,
2655 vcpu->run->s.regs.gprs);
0097d12e 2656 local_irq_disable();
db0758b2 2657 __enable_cpu_timer_accounting(vcpu);
6edaa530 2658 guest_exit_irqoff();
0097d12e 2659 local_irq_enable();
800c1065 2660 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
a76ccff6
TH		 2661
2662 rc = vcpu_post_run(vcpu, exit_reason);
27291e21 2663 } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
3fb4c40f 2664
800c1065 2665 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
e168bf8d 2666 return rc;
b0c632db
HC		 2667}
2668
b028ee3e
DH		 2669static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2670{
2671 vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
2672 vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
2673 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
2674 kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
2675 if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
2676 memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
d3d692c8
DH		 2677 /* some control register changes require a tlb flush */
2678 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
b028ee3e
DH		 2679 }
2680 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
4287f247 2681 kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
b028ee3e
DH		 2682 vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
2683 vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
2684 vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
2685 vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
2686 }
2687 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
2688 vcpu->arch.pfault_token = kvm_run->s.regs.pft;
2689 vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
2690 vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
9fbd8082
DH		 2691 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
2692 kvm_clear_async_pf_completion_queue(vcpu);
b028ee3e
DH		 2693 }
2694 kvm_run->kvm_dirty_regs = 0;
2695}
2696
2697static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2698{
2699 kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
2700 kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
2701 kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
2702 memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
4287f247 2703 kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
b028ee3e
DH		 2704 kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
2705 kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
2706 kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
2707 kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
2708 kvm_run->s.regs.pft = vcpu->arch.pfault_token;
2709 kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
2710 kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
2711}
2712
b0c632db
HC		 2713int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2714{
8f2abe6a 2715 int rc;
b0c632db
HC		 2716 sigset_t sigsaved;
2717
27291e21
DH		 2718 if (guestdbg_exit_pending(vcpu)) {
2719 kvm_s390_prepare_debug_exit(vcpu);
2720 return 0;
2721 }
2722
b0c632db
HC		 2723 if (vcpu->sigset_active)
2724 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2725
6352e4d2
DH		 2726 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
2727 kvm_s390_vcpu_start(vcpu);
2728 } else if (is_vcpu_stopped(vcpu)) {
ea2cdd27 2729 pr_err_ratelimited("can't run stopped vcpu %d\n",
6352e4d2
DH		 2730 vcpu->vcpu_id);
2731 return -EINVAL;
2732 }
b0c632db 2733
b028ee3e 2734 sync_regs(vcpu, kvm_run);
db0758b2 2735 enable_cpu_timer_accounting(vcpu);
d7b0b5eb 2736
dab4079d 2737 might_fault();
a76ccff6 2738 rc = __vcpu_run(vcpu);
9ace903d 2739
b1d16c49
CE		 2740 if (signal_pending(current) && !rc) {
2741 kvm_run->exit_reason = KVM_EXIT_INTR;
8f2abe6a 2742 rc = -EINTR;
b1d16c49 2743 }
8f2abe6a 2744
27291e21
DH		 2745 if (guestdbg_exit_pending(vcpu) && !rc) {
2746 kvm_s390_prepare_debug_exit(vcpu);
2747 rc = 0;
2748 }
2749
8f2abe6a 2750 if (rc == -EREMOTE) {
71f116bf 2751 /* userspace support is needed, kvm_run has been prepared */
8f2abe6a
CB		 2752 rc = 0;
2753 }
b0c632db 2754
db0758b2 2755 disable_cpu_timer_accounting(vcpu);
b028ee3e 2756 store_regs(vcpu, kvm_run);
d7b0b5eb 2757
b0c632db
HC		 2758 if (vcpu->sigset_active)
2759 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2760
b0c632db 2761 vcpu->stat.exit_userspace++;
7e8e6ab4 2762 return rc;
b0c632db
HC		 2763}
2764
b0c632db
HC		 2765/*
2766 * store status at address
2767 * we use have two special cases:
2768 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
2769 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
2770 */
d0bce605 2771int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
b0c632db 2772{
092670cd 2773 unsigned char archmode = 1;
9abc2a08 2774 freg_t fprs[NUM_FPRS];
fda902cb 2775 unsigned int px;
4287f247 2776 u64 clkcomp, cputm;
d0bce605 2777 int rc;
b0c632db 2778
d9a3a09a 2779 px = kvm_s390_get_prefix(vcpu);
d0bce605
HC		 2780 if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
2781 if (write_guest_abs(vcpu, 163, &archmode, 1))
b0c632db 2782 return -EFAULT;
d9a3a09a 2783 gpa = 0;
d0bce605
HC		 2784 } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
2785 if (write_guest_real(vcpu, 163, &archmode, 1))
b0c632db 2786 return -EFAULT;
d9a3a09a
MS		 2787 gpa = px;
2788 } else
2789 gpa -= __LC_FPREGS_SAVE_AREA;
9abc2a08
DH		 2790
2791 /* manually convert vector registers if necessary */
2792 if (MACHINE_HAS_VX) {
9522b37f 2793 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
9abc2a08
DH		 2794 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
2795 fprs, 128);
2796 } else {
2797 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
6fd8e67d 2798 vcpu->run->s.regs.fprs, 128);
9abc2a08 2799 }
d9a3a09a 2800 rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
d0bce605 2801 vcpu->run->s.regs.gprs, 128);
d9a3a09a 2802 rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
d0bce605 2803 &vcpu->arch.sie_block->gpsw, 16);
d9a3a09a 2804 rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
fda902cb 2805 &px, 4);
d9a3a09a 2806 rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
9abc2a08 2807 &vcpu->run->s.regs.fpc, 4);
d9a3a09a 2808 rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
d0bce605 2809 &vcpu->arch.sie_block->todpr, 4);
4287f247 2810 cputm = kvm_s390_get_cpu_timer(vcpu);
d9a3a09a 2811 rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
4287f247 2812 &cputm, 8);
178bd789 2813 clkcomp = vcpu->arch.sie_block->ckc >> 8;
d9a3a09a 2814 rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
d0bce605 2815 &clkcomp, 8);
d9a3a09a 2816 rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
d0bce605 2817 &vcpu->run->s.regs.acrs, 64);
d9a3a09a 2818 rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
d0bce605
HC		 2819 &vcpu->arch.sie_block->gcr, 128);
2820 return rc ? -EFAULT : 0;
b0c632db
HC		 2821}
2822
e879892c
TH		 2823int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
2824{
2825 /*
2826 * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
2827 * copying in vcpu load/put. Lets update our copies before we save
2828 * it into the save area
2829 */
d0164ee2 2830 save_fpu_regs();
9abc2a08 2831 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
e879892c
TH		 2832 save_access_regs(vcpu->run->s.regs.acrs);
2833
2834 return kvm_s390_store_status_unloaded(vcpu, addr);
2835}
2836
bc17de7c
EF		 2837/*
2838 * store additional status at address
2839 */
2840int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
2841 unsigned long gpa)
2842{
2843 /* Only bits 0-53 are used for address formation */
2844 if (!(gpa & ~0x3ff))
2845 return 0;
2846
2847 return write_guest_abs(vcpu, gpa & ~0x3ff,
2848 (void *)&vcpu->run->s.regs.vrs, 512);
2849}
2850
2851int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr)
2852{
2853 if (!test_kvm_facility(vcpu->kvm, 129))
2854 return 0;
2855
2856 /*
2857 * The guest VXRS are in the host VXRs due to the lazy
9977e886
HB		 2858 * copying in vcpu load/put. We can simply call save_fpu_regs()
2859 * to save the current register state because we are in the
2860 * middle of a load/put cycle.
2861 *
2862 * Let's update our copies before we save it into the save area.
bc17de7c 2863 */
d0164ee2 2864 save_fpu_regs();
bc17de7c
EF		 2865
2866 return kvm_s390_store_adtl_status_unloaded(vcpu, addr);
2867}
2868
8ad35755
DH		 2869static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
2870{
2871 kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
8e236546 2872 kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
8ad35755
DH		 2873}
2874
2875static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
2876{
2877 unsigned int i;
2878 struct kvm_vcpu *vcpu;
2879
2880 kvm_for_each_vcpu(i, vcpu, kvm) {
2881 __disable_ibs_on_vcpu(vcpu);
2882 }
2883}
2884
2885static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
2886{
09a400e7
DH		 2887 if (!sclp.has_ibs)
2888 return;
8ad35755 2889 kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
8e236546 2890 kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
8ad35755
DH		 2891}
2892
6852d7b6
DH		 2893void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
2894{
8ad35755
DH		 2895 int i, online_vcpus, started_vcpus = 0;
2896
2897 if (!is_vcpu_stopped(vcpu))
2898 return;
2899
6852d7b6 2900 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
8ad35755 2901 /* Only one cpu at a time may enter/leave the STOPPED state. */
433b9ee4 2902 spin_lock(&vcpu->kvm->arch.start_stop_lock);
8ad35755
DH		 2903 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
2904
2905 for (i = 0; i < online_vcpus; i++) {
2906 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
2907 started_vcpus++;
2908 }
2909
2910 if (started_vcpus == 0) {
2911 /* we're the only active VCPU -> speed it up */
2912 __enable_ibs_on_vcpu(vcpu);
2913 } else if (started_vcpus == 1) {
2914 /*
2915 * As we are starting a second VCPU, we have to disable
2916 * the IBS facility on all VCPUs to remove potentially
2917 * oustanding ENABLE requests.
2918 */
2919 __disable_ibs_on_all_vcpus(vcpu->kvm);
2920 }
2921
805de8f4 2922 atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
8ad35755
DH		 2923 /*
2924 * Another VCPU might have used IBS while we were offline.
2925 * Let's play safe and flush the VCPU at startup.
2926 */
d3d692c8 2927 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
433b9ee4 2928 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
8ad35755 2929 return;
6852d7b6
DH		 2930}
2931
2932void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
2933{
8ad35755
DH		 2934 int i, online_vcpus, started_vcpus = 0;
2935 struct kvm_vcpu *started_vcpu = NULL;
2936
2937 if (is_vcpu_stopped(vcpu))
2938 return;
2939
6852d7b6 2940 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
8ad35755 2941 /* Only one cpu at a time may enter/leave the STOPPED state. */
433b9ee4 2942 spin_lock(&vcpu->kvm->arch.start_stop_lock);
8ad35755
DH		 2943 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
2944
32f5ff63 2945 /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
6cddd432 2946 kvm_s390_clear_stop_irq(vcpu);
32f5ff63 2947
805de8f4 2948 atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
8ad35755
DH		 2949 __disable_ibs_on_vcpu(vcpu);
2950
2951 for (i = 0; i < online_vcpus; i++) {
2952 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
2953 started_vcpus++;
2954 started_vcpu = vcpu->kvm->vcpus[i];
2955 }
2956 }
2957
2958 if (started_vcpus == 1) {
2959 /*
2960 * As we only have one VCPU left, we want to enable the
2961 * IBS facility for that VCPU to speed it up.
2962 */
2963 __enable_ibs_on_vcpu(started_vcpu);
2964 }
2965
433b9ee4 2966 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
8ad35755 2967 return;
6852d7b6
DH		 2968}
2969
d6712df9
CH		 2970static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
2971 struct kvm_enable_cap *cap)
2972{
2973 int r;
2974
2975 if (cap->flags)
2976 return -EINVAL;
2977
2978 switch (cap->cap) {
fa6b7fe9
CH		 2979 case KVM_CAP_S390_CSS_SUPPORT:
2980 if (!vcpu->kvm->arch.css_support) {
2981 vcpu->kvm->arch.css_support = 1;
c92ea7b9 2982 VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
fa6b7fe9
CH		 2983 trace_kvm_s390_enable_css(vcpu->kvm);
2984 }
2985 r = 0;
2986 break;
d6712df9
CH		 2987 default:
2988 r = -EINVAL;
2989 break;
2990 }
2991 return r;
2992}
2993
41408c28
TH		 2994static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
2995 struct kvm_s390_mem_op *mop)
2996{
2997 void __user *uaddr = (void __user *)mop->buf;
2998 void *tmpbuf = NULL;
2999 int r, srcu_idx;
3000 const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
3001 | KVM_S390_MEMOP_F_CHECK_ONLY;
3002
3003 if (mop->flags & ~supported_flags)
3004 return -EINVAL;
3005
3006 if (mop->size > MEM_OP_MAX_SIZE)
3007 return -E2BIG;
3008
3009 if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
3010 tmpbuf = vmalloc(mop->size);
3011 if (!tmpbuf)
3012 return -ENOMEM;
3013 }
3014
3015 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3016
3017 switch (mop->op) {
3018 case KVM_S390_MEMOP_LOGICAL_READ:
3019 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
92c96321
DH		 3020 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
3021 mop->size, GACC_FETCH);
41408c28
TH		 3022 break;
3023 }
3024 r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
3025 if (r == 0) {
3026 if (copy_to_user(uaddr, tmpbuf, mop->size))
3027 r = -EFAULT;
3028 }
3029 break;
3030 case KVM_S390_MEMOP_LOGICAL_WRITE:
3031 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
92c96321
DH		 3032 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
3033 mop->size, GACC_STORE);
41408c28
TH		 3034 break;
3035 }
3036 if (copy_from_user(tmpbuf, uaddr, mop->size)) {
3037 r = -EFAULT;
3038 break;
3039 }
3040 r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
3041 break;
3042 default:
3043 r = -EINVAL;
3044 }
3045
3046 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
3047
3048 if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
3049 kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
3050
3051 vfree(tmpbuf);
3052 return r;
3053}
3054
b0c632db
HC		 3055long kvm_arch_vcpu_ioctl(struct file *filp,
3056 unsigned int ioctl, unsigned long arg)
3057{
3058 struct kvm_vcpu *vcpu = filp->private_data;
3059 void __user *argp = (void __user *)arg;
800c1065 3060 int idx;
bc923cc9 3061 long r;
b0c632db 3062
93736624 3063 switch (ioctl) {
47b43c52
JF		 3064 case KVM_S390_IRQ: {
3065 struct kvm_s390_irq s390irq;
3066
3067 r = -EFAULT;
3068 if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
3069 break;
3070 r = kvm_s390_inject_vcpu(vcpu, &s390irq);
3071 break;
3072 }
93736624 3073 case KVM_S390_INTERRUPT: {
ba5c1e9b 3074 struct kvm_s390_interrupt s390int;
383d0b05 3075 struct kvm_s390_irq s390irq;
ba5c1e9b 3076
93736624 3077 r = -EFAULT;
ba5c1e9b 3078 if (copy_from_user(&s390int, argp, sizeof(s390int)))
93736624 3079 break;
383d0b05
JF		 3080 if (s390int_to_s390irq(&s390int, &s390irq))
3081 return -EINVAL;
3082 r = kvm_s390_inject_vcpu(vcpu, &s390irq);
93736624 3083 break;
ba5c1e9b 3084 }
b0c632db 3085 case KVM_S390_STORE_STATUS:
800c1065 3086 idx = srcu_read_lock(&vcpu->kvm->srcu);
bc923cc9 3087 r = kvm_s390_vcpu_store_status(vcpu, arg);
800c1065 3088 srcu_read_unlock(&vcpu->kvm->srcu, idx);
bc923cc9 3089 break;
b0c632db
HC		 3090 case KVM_S390_SET_INITIAL_PSW: {
3091 psw_t psw;
3092
bc923cc9 3093 r = -EFAULT;
b0c632db 3094 if (copy_from_user(&psw, argp, sizeof(psw)))
bc923cc9
AK		 3095 break;
3096 r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
3097 break;
b0c632db
HC		 3098 }
3099 case KVM_S390_INITIAL_RESET:
bc923cc9
AK		 3100 r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
3101 break;
14eebd91
CO		 3102 case KVM_SET_ONE_REG:
3103 case KVM_GET_ONE_REG: {
3104 struct kvm_one_reg reg;
3105 r = -EFAULT;
3106 if (copy_from_user(&reg, argp, sizeof(reg)))
3107 break;
3108 if (ioctl == KVM_SET_ONE_REG)
3109 r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, &reg);
3110 else
3111 r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, &reg);
3112 break;
3113 }
27e0393f
CO		 3114#ifdef CONFIG_KVM_S390_UCONTROL
3115 case KVM_S390_UCAS_MAP: {
3116 struct kvm_s390_ucas_mapping ucasmap;
3117
3118 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
3119 r = -EFAULT;
3120 break;
3121 }
3122
3123 if (!kvm_is_ucontrol(vcpu->kvm)) {
3124 r = -EINVAL;
3125 break;
3126 }
3127
3128 r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
3129 ucasmap.vcpu_addr, ucasmap.length);
3130 break;
3131 }
3132 case KVM_S390_UCAS_UNMAP: {
3133 struct kvm_s390_ucas_mapping ucasmap;
3134
3135 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
3136 r = -EFAULT;
3137 break;
3138 }
3139
3140 if (!kvm_is_ucontrol(vcpu->kvm)) {
3141 r = -EINVAL;
3142 break;
3143 }
3144
3145 r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
3146 ucasmap.length);
3147 break;
3148 }
3149#endif
ccc7910f 3150 case KVM_S390_VCPU_FAULT: {
527e30b4 3151 r = gmap_fault(vcpu->arch.gmap, arg, 0);
ccc7910f
CO		 3152 break;
3153 }
d6712df9
CH		 3154 case KVM_ENABLE_CAP:
3155 {
3156 struct kvm_enable_cap cap;
3157 r = -EFAULT;
3158 if (copy_from_user(&cap, argp, sizeof(cap)))
3159 break;
3160 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
3161 break;
3162 }
41408c28
TH		 3163 case KVM_S390_MEM_OP: {
3164 struct kvm_s390_mem_op mem_op;
3165
3166 if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
3167 r = kvm_s390_guest_mem_op(vcpu, &mem_op);
3168 else
3169 r = -EFAULT;
3170 break;
3171 }
816c7667
JF		 3172 case KVM_S390_SET_IRQ_STATE: {
3173 struct kvm_s390_irq_state irq_state;
3174
3175 r = -EFAULT;
3176 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
3177 break;
3178 if (irq_state.len > VCPU_IRQS_MAX_BUF ||
3179 irq_state.len == 0 ||
3180 irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
3181 r = -EINVAL;
3182 break;
3183 }
3184 r = kvm_s390_set_irq_state(vcpu,
3185 (void __user *) irq_state.buf,
3186 irq_state.len);
3187 break;
3188 }
3189 case KVM_S390_GET_IRQ_STATE: {
3190 struct kvm_s390_irq_state irq_state;
3191
3192 r = -EFAULT;
3193 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
3194 break;
3195 if (irq_state.len == 0) {
3196 r = -EINVAL;
3197 break;
3198 }
3199 r = kvm_s390_get_irq_state(vcpu,
3200 (__u8 __user *) irq_state.buf,
3201 irq_state.len);
3202 break;
3203 }
b0c632db 3204 default:
3e6afcf1 3205 r = -ENOTTY;
b0c632db 3206 }
bc923cc9 3207 return r;
b0c632db
HC		 3208}
3209
5b1c1493
CO		 3210int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
3211{
3212#ifdef CONFIG_KVM_S390_UCONTROL
3213 if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
3214 && (kvm_is_ucontrol(vcpu->kvm))) {
3215 vmf->page = virt_to_page(vcpu->arch.sie_block);
3216 get_page(vmf->page);
3217 return 0;
3218 }
3219#endif
3220 return VM_FAULT_SIGBUS;
3221}
3222
5587027c
AK		 3223int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
3224 unsigned long npages)
db3fe4eb
TY		 3225{
3226 return 0;
3227}
3228
b0c632db 3229/* Section: memory related */
f7784b8e
MT		 3230int kvm_arch_prepare_memory_region(struct kvm *kvm,
3231 struct kvm_memory_slot *memslot,
09170a49 3232 const struct kvm_userspace_memory_region *mem,
7b6195a9 3233 enum kvm_mr_change change)
b0c632db 3234{
dd2887e7
NW		 3235 /* A few sanity checks. We can have memory slots which have to be
3236 located/ended at a segment boundary (1MB). The memory in userland is
3237 ok to be fragmented into various different vmas. It is okay to mmap()
3238 and munmap() stuff in this slot after doing this call at any time */
b0c632db 3239
598841ca 3240 if (mem->userspace_addr & 0xffffful)
b0c632db
HC		 3241 return -EINVAL;
3242
598841ca 3243 if (mem->memory_size & 0xffffful)
b0c632db
HC		 3244 return -EINVAL;
3245
a3a92c31
DD		 3246 if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
3247 return -EINVAL;
3248
f7784b8e
MT		 3249 return 0;
3250}
3251
3252void kvm_arch_commit_memory_region(struct kvm *kvm,
09170a49 3253 const struct kvm_userspace_memory_region *mem,
8482644a 3254 const struct kvm_memory_slot *old,
f36f3f28 3255 const struct kvm_memory_slot *new,
8482644a 3256 enum kvm_mr_change change)
f7784b8e 3257{
f7850c92 3258 int rc;
f7784b8e 3259
2cef4deb
CB		 3260 /* If the basics of the memslot do not change, we do not want
3261 * to update the gmap. Every update causes several unnecessary
3262 * segment translation exceptions. This is usually handled just
3263 * fine by the normal fault handler + gmap, but it will also
3264 * cause faults on the prefix page of running guest CPUs.
3265 */
3266 if (old->userspace_addr == mem->userspace_addr &&
3267 old->base_gfn * PAGE_SIZE == mem->guest_phys_addr &&
3268 old->npages * PAGE_SIZE == mem->memory_size)
3269 return;
598841ca
CO		 3270
3271 rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
3272 mem->guest_phys_addr, mem->memory_size);
3273 if (rc)
ea2cdd27 3274 pr_warn("failed to commit memory region\n");
598841ca 3275 return;
b0c632db
HC		 3276}
3277
60a37709
AY		 3278static inline unsigned long nonhyp_mask(int i)
3279{
3280 unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
3281
3282 return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
3283}
3284
3491caf2
CB		 3285void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
3286{
3287 vcpu->valid_wakeup = false;
3288}
3289
b0c632db
HC		 3290static int __init kvm_s390_init(void)
3291{
60a37709
AY		 3292 int i;
3293
07197fd0
DH		 3294 if (!sclp.has_sief2) {
3295 pr_info("SIE not available\n");
3296 return -ENODEV;
3297 }
3298
60a37709
AY		 3299 for (i = 0; i < 16; i++)
3300 kvm_s390_fac_list_mask[i] |=
3301 S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
3302
9d8d5786 3303 return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
b0c632db
HC		 3304}
3305
3306static void __exit kvm_s390_exit(void)
3307{
3308 kvm_exit();
3309}
3310
3311module_init(kvm_s390_init);
3312module_exit(kvm_s390_exit);
566af940
CH		 3313
3314/*
3315 * Enable autoloading of the kvm module.
3316 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
3317 * since x86 takes a different approach.
3318 */
3319#include <linux/miscdevice.h>
3320MODULE_ALIAS_MISCDEV(KVM_MINOR);
3321MODULE_ALIAS("devname:kvm");
Linux kernel - Deliverables
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