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UBUNTU: Ubuntu-5.3.0-29.31
[mirror_ubuntu-eoan-kernel.git] / arch / s390 / kvm / kvm-s390.c
CommitLineData
d809aa23 1// SPDX-License-Identifier: GPL-2.0
b0c632db 2/*
bb64da9a 3 * hosting IBM Z kernel virtual machines (s390x)
b0c632db 4 *
a37cb07a 5 * Copyright IBM Corp. 2008, 2018
b0c632db
HC		 6 *
7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
9 * Heiko Carstens <heiko.carstens@de.ibm.com>
628eb9b8 10 * Christian Ehrhardt <ehrhardt@de.ibm.com>
15f36ebd 11 * Jason J. Herne <jjherne@us.ibm.com>
b0c632db
HC		 12 */
13
7aedd9d4
MM		 14#define KMSG_COMPONENT "kvm-s390"
15#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
16
b0c632db
HC		 17#include <linux/compiler.h>
18#include <linux/err.h>
19#include <linux/fs.h>
ca872302 20#include <linux/hrtimer.h>
b0c632db
HC		 21#include <linux/init.h>
22#include <linux/kvm.h>
23#include <linux/kvm_host.h>
b2d73b2a 24#include <linux/mman.h>
b0c632db 25#include <linux/module.h>
d3217967 26#include <linux/moduleparam.h>
a374e892 27#include <linux/random.h>
b0c632db 28#include <linux/slab.h>
ba5c1e9b 29#include <linux/timer.h>
41408c28 30#include <linux/vmalloc.h>
15c9705f 31#include <linux/bitmap.h>
174cd4b1 32#include <linux/sched/signal.h>
190df4a2 33#include <linux/string.h>
174cd4b1 34
cbb870c8 35#include <asm/asm-offsets.h>
b0c632db 36#include <asm/lowcore.h>
fd5ada04 37#include <asm/stp.h>
b0c632db 38#include <asm/pgtable.h>
1e133ab2 39#include <asm/gmap.h>
f5daba1d 40#include <asm/nmi.h>
a0616cde 41#include <asm/switch_to.h>
6d3da241 42#include <asm/isc.h>
1526bf9c 43#include <asm/sclp.h>
0a763c78 44#include <asm/cpacf.h>
221bb8a4 45#include <asm/timex.h>
e585b24a 46#include <asm/ap.h>
8f2abe6a 47#include "kvm-s390.h"
b0c632db
HC		 48#include "gaccess.h"
49
5786fffa
CH		 50#define CREATE_TRACE_POINTS
51#include "trace.h"
ade38c31 52#include "trace-s390.h"
5786fffa 53
41408c28 54#define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */
816c7667
JF		 55#define LOCAL_IRQS 32
56#define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
57 (KVM_MAX_VCPUS + LOCAL_IRQS))
41408c28 58
b0c632db 59#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
ccc40c53 60#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
b0c632db
HC		 61
62struct kvm_stats_debugfs_item debugfs_entries[] = {
63 { "userspace_handled", VCPU_STAT(exit_userspace) },
0eaeafa1 64 { "exit_null", VCPU_STAT(exit_null) },
8f2abe6a
CB		 65 { "exit_validity", VCPU_STAT(exit_validity) },
66 { "exit_stop_request", VCPU_STAT(exit_stop_request) },
67 { "exit_external_request", VCPU_STAT(exit_external_request) },
a5e0acea 68 { "exit_io_request", VCPU_STAT(exit_io_request) },
8f2abe6a 69 { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
ba5c1e9b 70 { "exit_instruction", VCPU_STAT(exit_instruction) },
9ec6de19 71 { "exit_pei", VCPU_STAT(exit_pei) },
ba5c1e9b
CO		 72 { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
73 { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
a011eeb2 74 { "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
f7819512 75 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
62bea5bf 76 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
3491caf2 77 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
8b905d28 78 { "halt_no_poll_steal", VCPU_STAT(halt_no_poll_steal) },
ce2e4f0b 79 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
f5e10b09 80 { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
ba5c1e9b 81 { "instruction_lctl", VCPU_STAT(instruction_lctl) },
aba07508
DH		 82 { "instruction_stctl", VCPU_STAT(instruction_stctl) },
83 { "instruction_stctg", VCPU_STAT(instruction_stctg) },
ccc40c53
CB		 84 { "deliver_ckc", VCPU_STAT(deliver_ckc) },
85 { "deliver_cputm", VCPU_STAT(deliver_cputm) },
ba5c1e9b 86 { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
7697e71f 87 { "deliver_external_call", VCPU_STAT(deliver_external_call) },
ba5c1e9b 88 { "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
ccc40c53 89 { "deliver_virtio", VCPU_STAT(deliver_virtio) },
ba5c1e9b
CO		 90 { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
91 { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
92 { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
ccc40c53
CB		 93 { "deliver_program", VCPU_STAT(deliver_program) },
94 { "deliver_io", VCPU_STAT(deliver_io) },
32de0749 95 { "deliver_machine_check", VCPU_STAT(deliver_machine_check) },
ba5c1e9b 96 { "exit_wait_state", VCPU_STAT(exit_wait_state) },
ccc40c53
CB		 97 { "inject_ckc", VCPU_STAT(inject_ckc) },
98 { "inject_cputm", VCPU_STAT(inject_cputm) },
99 { "inject_external_call", VCPU_STAT(inject_external_call) },
100 { "inject_float_mchk", VM_STAT(inject_float_mchk) },
101 { "inject_emergency_signal", VCPU_STAT(inject_emergency_signal) },
102 { "inject_io", VM_STAT(inject_io) },
103 { "inject_mchk", VCPU_STAT(inject_mchk) },
104 { "inject_pfault_done", VM_STAT(inject_pfault_done) },
105 { "inject_program", VCPU_STAT(inject_program) },
106 { "inject_restart", VCPU_STAT(inject_restart) },
107 { "inject_service_signal", VM_STAT(inject_service_signal) },
108 { "inject_set_prefix", VCPU_STAT(inject_set_prefix) },
109 { "inject_stop_signal", VCPU_STAT(inject_stop_signal) },
110 { "inject_pfault_init", VCPU_STAT(inject_pfault_init) },
111 { "inject_virtio", VM_STAT(inject_virtio) },
a37cb07a
CB		 112 { "instruction_epsw", VCPU_STAT(instruction_epsw) },
113 { "instruction_gs", VCPU_STAT(instruction_gs) },
114 { "instruction_io_other", VCPU_STAT(instruction_io_other) },
115 { "instruction_lpsw", VCPU_STAT(instruction_lpsw) },
116 { "instruction_lpswe", VCPU_STAT(instruction_lpswe) },
69d0d3a3 117 { "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
a37cb07a 118 { "instruction_ptff", VCPU_STAT(instruction_ptff) },
453423dc 119 { "instruction_stidp", VCPU_STAT(instruction_stidp) },
a37cb07a
CB		 120 { "instruction_sck", VCPU_STAT(instruction_sck) },
121 { "instruction_sckpf", VCPU_STAT(instruction_sckpf) },
453423dc
CB		 122 { "instruction_spx", VCPU_STAT(instruction_spx) },
123 { "instruction_stpx", VCPU_STAT(instruction_stpx) },
124 { "instruction_stap", VCPU_STAT(instruction_stap) },
a37cb07a
CB		 125 { "instruction_iske", VCPU_STAT(instruction_iske) },
126 { "instruction_ri", VCPU_STAT(instruction_ri) },
127 { "instruction_rrbe", VCPU_STAT(instruction_rrbe) },
128 { "instruction_sske", VCPU_STAT(instruction_sske) },
8a242234 129 { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
b31288fa 130 { "instruction_essa", VCPU_STAT(instruction_essa) },
453423dc
CB		 131 { "instruction_stsi", VCPU_STAT(instruction_stsi) },
132 { "instruction_stfl", VCPU_STAT(instruction_stfl) },
a37cb07a
CB		 133 { "instruction_tb", VCPU_STAT(instruction_tb) },
134 { "instruction_tpi", VCPU_STAT(instruction_tpi) },
bb25b9ba 135 { "instruction_tprot", VCPU_STAT(instruction_tprot) },
a37cb07a 136 { "instruction_tsch", VCPU_STAT(instruction_tsch) },
95ca2cb5 137 { "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
a3508fbe 138 { "instruction_sie", VCPU_STAT(instruction_sie) },
5288fbf0 139 { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
bd59d3a4 140 { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
7697e71f 141 { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
5288fbf0 142 { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
42cb0c9f
DH		 143 { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
144 { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
5288fbf0 145 { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
42cb0c9f
DH		 146 { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
147 { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
cd7b4b61 148 { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
5288fbf0
CB		 149 { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
150 { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
151 { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
42cb0c9f
DH		 152 { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) },
153 { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) },
154 { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) },
866c138c
CB		 155 { "instruction_diag_10", VCPU_STAT(diagnose_10) },
156 { "instruction_diag_44", VCPU_STAT(diagnose_44) },
157 { "instruction_diag_9c", VCPU_STAT(diagnose_9c) },
158 { "instruction_diag_258", VCPU_STAT(diagnose_258) },
159 { "instruction_diag_308", VCPU_STAT(diagnose_308) },
160 { "instruction_diag_500", VCPU_STAT(diagnose_500) },
a37cb07a 161 { "instruction_diag_other", VCPU_STAT(diagnose_other) },
b0c632db
HC		 162 { NULL }
163};
164
8fa1696e
CW		 165struct kvm_s390_tod_clock_ext {
166 __u8 epoch_idx;
167 __u64 tod;
168 __u8 reserved[7];
169} __packed;
170
a411edf1
DH		 171/* allow nested virtualization in KVM (if enabled by user space) */
172static int nested;
173module_param(nested, int, S_IRUGO);
174MODULE_PARM_DESC(nested, "Nested virtualization support");
175
a4499382
JF		 176/* allow 1m huge page guest backing, if !nested */
177static int hpage;
178module_param(hpage, int, 0444);
179MODULE_PARM_DESC(hpage, "1m huge page backing support");
b0c632db 180
8b905d28
CB		 181/* maximum percentage of steal time for polling. >100 is treated like 100 */
182static u8 halt_poll_max_steal = 10;
183module_param(halt_poll_max_steal, byte, 0644);
b41fb528 184MODULE_PARM_DESC(halt_poll_max_steal, "Maximum percentage of steal time to allow polling");
8b905d28 185
c3b9e3e1
CB		 186/*
187 * For now we handle at most 16 double words as this is what the s390 base
188 * kernel handles and stores in the prefix page. If we ever need to go beyond
189 * this, this requires changes to code, but the external uapi can stay.
190 */
191#define SIZE_INTERNAL 16
192
193/*
194 * Base feature mask that defines default mask for facilities. Consists of the
195 * defines in FACILITIES_KVM and the non-hypervisor managed bits.
196 */
197static unsigned long kvm_s390_fac_base[SIZE_INTERNAL] = { FACILITIES_KVM };
198/*
199 * Extended feature mask. Consists of the defines in FACILITIES_KVM_CPUMODEL
200 * and defines the facilities that can be enabled via a cpu model.
201 */
202static unsigned long kvm_s390_fac_ext[SIZE_INTERNAL] = { FACILITIES_KVM_CPUMODEL };
203
204static unsigned long kvm_s390_fac_size(void)
78c4b59f 205{
c3b9e3e1
CB		 206 BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_MASK_SIZE_U64);
207 BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_LIST_SIZE_U64);
208 BUILD_BUG_ON(SIZE_INTERNAL * sizeof(unsigned long) >
209 sizeof(S390_lowcore.stfle_fac_list));
210
211 return SIZE_INTERNAL;
78c4b59f
MM		 212}
213
15c9705f
DH		 214/* available cpu features supported by kvm */
215static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
0a763c78
DH		 216/* available subfunctions indicated via query / "test bit" */
217static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;
15c9705f 218
9d8d5786 219static struct gmap_notifier gmap_notifier;
a3508fbe 220static struct gmap_notifier vsie_gmap_notifier;
78f26131 221debug_info_t *kvm_s390_dbf;
9d8d5786 222
b0c632db 223/* Section: not file related */
13a34e06 224int kvm_arch_hardware_enable(void)
b0c632db
HC		 225{
226 /* every s390 is virtualization enabled ;-) */
10474ae8 227 return 0;
b0c632db
HC		 228}
229
f257d6dc
SC		 230int kvm_arch_check_processor_compat(void)
231{
232 return 0;
233}
234
414d3b07
MS		 235static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
236 unsigned long end);
2c70fe44 237
1575767e
DH		 238static void kvm_clock_sync_scb(struct kvm_s390_sie_block *scb, u64 delta)
239{
240 u8 delta_idx = 0;
241
242 /*
243 * The TOD jumps by delta, we have to compensate this by adding
244 * -delta to the epoch.
245 */
246 delta = -delta;
247
248 /* sign-extension - we're adding to signed values below */
249 if ((s64)delta < 0)
250 delta_idx = -1;
251
252 scb->epoch += delta;
253 if (scb->ecd & ECD_MEF) {
254 scb->epdx += delta_idx;
255 if (scb->epoch < delta)
256 scb->epdx += 1;
257 }
258}
259
fdf03650
FZ		 260/*
261 * This callback is executed during stop_machine(). All CPUs are therefore
262 * temporarily stopped. In order not to change guest behavior, we have to
263 * disable preemption whenever we touch the epoch of kvm and the VCPUs,
264 * so a CPU won't be stopped while calculating with the epoch.
265 */
266static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
267 void *v)
268{
269 struct kvm *kvm;
270 struct kvm_vcpu *vcpu;
271 int i;
272 unsigned long long *delta = v;
273
274 list_for_each_entry(kvm, &vm_list, vm_list) {
fdf03650 275 kvm_for_each_vcpu(i, vcpu, kvm) {
1575767e
DH		 276 kvm_clock_sync_scb(vcpu->arch.sie_block, *delta);
277 if (i == 0) {
278 kvm->arch.epoch = vcpu->arch.sie_block->epoch;
279 kvm->arch.epdx = vcpu->arch.sie_block->epdx;
280 }
db0758b2
DH		 281 if (vcpu->arch.cputm_enabled)
282 vcpu->arch.cputm_start += *delta;
91473b48 283 if (vcpu->arch.vsie_block)
1575767e
DH		 284 kvm_clock_sync_scb(vcpu->arch.vsie_block,
285 *delta);
fdf03650
FZ		 286 }
287 }
288 return NOTIFY_OK;
289}
290
291static struct notifier_block kvm_clock_notifier = {
292 .notifier_call = kvm_clock_sync,
293};
294
b0c632db
HC		 295int kvm_arch_hardware_setup(void)
296{
2c70fe44 297 gmap_notifier.notifier_call = kvm_gmap_notifier;
b2d73b2a 298 gmap_register_pte_notifier(&gmap_notifier);
a3508fbe
DH		 299 vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier;
300 gmap_register_pte_notifier(&vsie_gmap_notifier);
fdf03650
FZ		 301 atomic_notifier_chain_register(&s390_epoch_delta_notifier,
302 &kvm_clock_notifier);
b0c632db
HC		 303 return 0;
304}
305
306void kvm_arch_hardware_unsetup(void)
307{
b2d73b2a 308 gmap_unregister_pte_notifier(&gmap_notifier);
a3508fbe 309 gmap_unregister_pte_notifier(&vsie_gmap_notifier);
fdf03650
FZ		 310 atomic_notifier_chain_unregister(&s390_epoch_delta_notifier,
311 &kvm_clock_notifier);
b0c632db
HC		 312}
313
22be5a13
DH		 314static void allow_cpu_feat(unsigned long nr)
315{
316 set_bit_inv(nr, kvm_s390_available_cpu_feat);
317}
318
0a763c78
DH		 319static inline int plo_test_bit(unsigned char nr)
320{
321 register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
d051ae53 322 int cc;
0a763c78
DH		 323
324 asm volatile(
325 /* Parameter registers are ignored for "test bit" */
326 " plo 0,0,0,0(0)\n"
327 " ipm %0\n"
328 " srl %0,28\n"
329 : "=d" (cc)
330 : "d" (r0)
331 : "cc");
332 return cc == 0;
333}
334
8345f7c5 335static inline void __insn32_query(unsigned int opcode, u8 *query)
d6681397
CB		 336{
337 register unsigned long r0 asm("0") = 0; /* query function */
338 register unsigned long r1 asm("1") = (unsigned long) query;
339
340 asm volatile(
341 /* Parameter regs are ignored */
342 " .insn rrf,%[opc] << 16,2,4,6,0\n"
8345f7c5 343 :
d6681397 344 : "d" (r0), "a" (r1), [opc] "i" (opcode)
8345f7c5 345 : "cc", "memory");
d6681397
CB		 346}
347
173aec2d 348#define INSN_SORTL 0xb938
4f45b90e 349#define INSN_DFLTCC 0xb939
173aec2d 350
22be5a13
DH		 351static void kvm_s390_cpu_feat_init(void)
352{
0a763c78
DH		 353 int i;
354
355 for (i = 0; i < 256; ++i) {
356 if (plo_test_bit(i))
357 kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7);
358 }
359
360 if (test_facility(28)) /* TOD-clock steering */
221bb8a4
LT		 361 ptff(kvm_s390_available_subfunc.ptff,
362 sizeof(kvm_s390_available_subfunc.ptff),
363 PTFF_QAF);
0a763c78
DH		 364
365 if (test_facility(17)) { /* MSA */
69c0e360
MS		 366 __cpacf_query(CPACF_KMAC, (cpacf_mask_t *)
367 kvm_s390_available_subfunc.kmac);
368 __cpacf_query(CPACF_KMC, (cpacf_mask_t *)
369 kvm_s390_available_subfunc.kmc);
370 __cpacf_query(CPACF_KM, (cpacf_mask_t *)
371 kvm_s390_available_subfunc.km);
372 __cpacf_query(CPACF_KIMD, (cpacf_mask_t *)
373 kvm_s390_available_subfunc.kimd);
374 __cpacf_query(CPACF_KLMD, (cpacf_mask_t *)
375 kvm_s390_available_subfunc.klmd);
0a763c78
DH		 376 }
377 if (test_facility(76)) /* MSA3 */
69c0e360
MS		 378 __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *)
379 kvm_s390_available_subfunc.pckmo);
0a763c78 380 if (test_facility(77)) { /* MSA4 */
69c0e360
MS		 381 __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *)
382 kvm_s390_available_subfunc.kmctr);
383 __cpacf_query(CPACF_KMF, (cpacf_mask_t *)
384 kvm_s390_available_subfunc.kmf);
385 __cpacf_query(CPACF_KMO, (cpacf_mask_t *)
386 kvm_s390_available_subfunc.kmo);
387 __cpacf_query(CPACF_PCC, (cpacf_mask_t *)
388 kvm_s390_available_subfunc.pcc);
0a763c78
DH		 389 }
390 if (test_facility(57)) /* MSA5 */
985a9d20 391 __cpacf_query(CPACF_PRNO, (cpacf_mask_t *)
69c0e360 392 kvm_s390_available_subfunc.ppno);
0a763c78 393
e000b8e0
JH		 394 if (test_facility(146)) /* MSA8 */
395 __cpacf_query(CPACF_KMA, (cpacf_mask_t *)
396 kvm_s390_available_subfunc.kma);
397
13209ad0
CB		 398 if (test_facility(155)) /* MSA9 */
399 __cpacf_query(CPACF_KDSA, (cpacf_mask_t *)
400 kvm_s390_available_subfunc.kdsa);
401
173aec2d
CB		 402 if (test_facility(150)) /* SORTL */
403 __insn32_query(INSN_SORTL, kvm_s390_available_subfunc.sortl);
404
4f45b90e
CB		 405 if (test_facility(151)) /* DFLTCC */
406 __insn32_query(INSN_DFLTCC, kvm_s390_available_subfunc.dfltcc);
407
22be5a13
DH		 408 if (MACHINE_HAS_ESOP)
409 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
a3508fbe
DH		 410 /*
411 * We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
412 * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
413 */
414 if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
a411edf1 415 !test_facility(3) || !nested)
a3508fbe
DH		 416 return;
417 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
19c439b5
DH		 418 if (sclp.has_64bscao)
419 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
0615a326
DH		 420 if (sclp.has_siif)
421 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
77d18f6d
DH		 422 if (sclp.has_gpere)
423 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE);
a1b7b9b2
DH		 424 if (sclp.has_gsls)
425 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
5630a8e8
DH		 426 if (sclp.has_ib)
427 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
13ee3f67
DH		 428 if (sclp.has_cei)
429 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
7fd7f39d
DH		 430 if (sclp.has_ibs)
431 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
730cd632
FA		 432 if (sclp.has_kss)
433 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS);
5d3876a8
DH		 434 /*
435 * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
436 * all skey handling functions read/set the skey from the PGSTE
437 * instead of the real storage key.
438 *
439 * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make
440 * pages being detected as preserved although they are resident.
441 *
442 * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will
443 * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY.
444 *
445 * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and
446 * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be
447 * correctly shadowed. We can do that for the PGSTE but not for PTE.I.
448 *
449 * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We
450 * cannot easily shadow the SCA because of the ipte lock.
451 */
22be5a13
DH		 452}
453
b0c632db
HC		 454int kvm_arch_init(void *opaque)
455{
308c3e66
MM		 456 int rc;
457
78f26131
CB		 458 kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
459 if (!kvm_s390_dbf)
460 return -ENOMEM;
461
462 if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
308c3e66
MM		 463 rc = -ENOMEM;
464 goto out_debug_unreg;
78f26131
CB		 465 }
466
22be5a13
DH		 467 kvm_s390_cpu_feat_init();
468
84877d93 469 /* Register floating interrupt controller interface. */
308c3e66
MM		 470 rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
471 if (rc) {
8d43d570 472 pr_err("A FLIC registration call failed with rc=%d\n", rc);
308c3e66
MM		 473 goto out_debug_unreg;
474 }
b1d1e76e
MM		 475
476 rc = kvm_s390_gib_init(GAL_ISC);
477 if (rc)
478 goto out_gib_destroy;
479
308c3e66
MM		 480 return 0;
481
b1d1e76e
MM		 482out_gib_destroy:
483 kvm_s390_gib_destroy();
308c3e66
MM		 484out_debug_unreg:
485 debug_unregister(kvm_s390_dbf);
486 return rc;
b0c632db
HC		 487}
488
78f26131
CB		 489void kvm_arch_exit(void)
490{
1282c21e 491 kvm_s390_gib_destroy();
78f26131
CB		 492 debug_unregister(kvm_s390_dbf);
493}
494
b0c632db
HC		 495/* Section: device related */
496long kvm_arch_dev_ioctl(struct file *filp,
497 unsigned int ioctl, unsigned long arg)
498{
499 if (ioctl == KVM_S390_ENABLE_SIE)
500 return s390_enable_sie();
501 return -EINVAL;
502}
503
784aa3d7 504int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
b0c632db 505{
d7b0b5eb
CO		 506 int r;
507
2bd0ac4e 508 switch (ext) {
d7b0b5eb 509 case KVM_CAP_S390_PSW:
b6cf8788 510 case KVM_CAP_S390_GMAP:
52e16b18 511 case KVM_CAP_SYNC_MMU:
1efd0f59
CO		 512#ifdef CONFIG_KVM_S390_UCONTROL
513 case KVM_CAP_S390_UCONTROL:
514#endif
3c038e6b 515 case KVM_CAP_ASYNC_PF:
60b413c9 516 case KVM_CAP_SYNC_REGS:
14eebd91 517 case KVM_CAP_ONE_REG:
d6712df9 518 case KVM_CAP_ENABLE_CAP:
fa6b7fe9 519 case KVM_CAP_S390_CSS_SUPPORT:
10ccaa1e 520 case KVM_CAP_IOEVENTFD:
c05c4186 521 case KVM_CAP_DEVICE_CTRL:
78599d90 522 case KVM_CAP_S390_IRQCHIP:
f2061656 523 case KVM_CAP_VM_ATTRIBUTES:
6352e4d2 524 case KVM_CAP_MP_STATE:
460df4c1 525 case KVM_CAP_IMMEDIATE_EXIT:
47b43c52 526 case KVM_CAP_S390_INJECT_IRQ:
2444b352 527 case KVM_CAP_S390_USER_SIGP:
e44fc8c9 528 case KVM_CAP_S390_USER_STSI:
30ee2a98 529 case KVM_CAP_S390_SKEYS:
816c7667 530 case KVM_CAP_S390_IRQ_STATE:
6502a34c 531 case KVM_CAP_S390_USER_INSTR0:
4036e387 532 case KVM_CAP_S390_CMMA_MIGRATION:
47a4693e 533 case KVM_CAP_S390_AIS:
da9a1446 534 case KVM_CAP_S390_AIS_MIGRATION:
d7b0b5eb
CO		 535 r = 1;
536 break;
a4499382
JF		 537 case KVM_CAP_S390_HPAGE_1M:
538 r = 0;
40ebdb8e 539 if (hpage && !kvm_is_ucontrol(kvm))
a4499382
JF		 540 r = 1;
541 break;
41408c28
TH		 542 case KVM_CAP_S390_MEM_OP:
543 r = MEM_OP_MAX_SIZE;
544 break;
e726b1bd
CB		 545 case KVM_CAP_NR_VCPUS:
546 case KVM_CAP_MAX_VCPUS:
a86cb413 547 case KVM_CAP_MAX_VCPU_ID:
76a6dd72 548 r = KVM_S390_BSCA_CPU_SLOTS;
a6940674
DH		 549 if (!kvm_s390_use_sca_entries())
550 r = KVM_MAX_VCPUS;
551 else if (sclp.has_esca && sclp.has_64bscao)
76a6dd72 552 r = KVM_S390_ESCA_CPU_SLOTS;
e726b1bd 553 break;
1526bf9c 554 case KVM_CAP_S390_COW:
abf09bed 555 r = MACHINE_HAS_ESOP;
1526bf9c 556 break;
68c55750
EF		 557 case KVM_CAP_S390_VECTOR_REGISTERS:
558 r = MACHINE_HAS_VX;
559 break;
c6e5f166
FZ		 560 case KVM_CAP_S390_RI:
561 r = test_facility(64);
562 break;
4e0b1ab7
FZ		 563 case KVM_CAP_S390_GS:
564 r = test_facility(133);
565 break;
35b3fde6
CB		 566 case KVM_CAP_S390_BPB:
567 r = test_facility(82);
568 break;
2bd0ac4e 569 default:
d7b0b5eb 570 r = 0;
2bd0ac4e 571 }
d7b0b5eb 572 return r;
b0c632db
HC		 573}
574
15f36ebd 575static void kvm_s390_sync_dirty_log(struct kvm *kvm,
0959e168 576 struct kvm_memory_slot *memslot)
15f36ebd 577{
0959e168 578 int i;
15f36ebd 579 gfn_t cur_gfn, last_gfn;
0959e168 580 unsigned long gaddr, vmaddr;
15f36ebd 581 struct gmap *gmap = kvm->arch.gmap;
0959e168 582 DECLARE_BITMAP(bitmap, _PAGE_ENTRIES);
15f36ebd 583
0959e168
JF		 584 /* Loop over all guest segments */
585 cur_gfn = memslot->base_gfn;
15f36ebd 586 last_gfn = memslot->base_gfn + memslot->npages;
0959e168
JF		 587 for (; cur_gfn <= last_gfn; cur_gfn += _PAGE_ENTRIES) {
588 gaddr = gfn_to_gpa(cur_gfn);
589 vmaddr = gfn_to_hva_memslot(memslot, cur_gfn);
590 if (kvm_is_error_hva(vmaddr))
591 continue;
592
593 bitmap_zero(bitmap, _PAGE_ENTRIES);
594 gmap_sync_dirty_log_pmd(gmap, bitmap, gaddr, vmaddr);
595 for (i = 0; i < _PAGE_ENTRIES; i++) {
596 if (test_bit(i, bitmap))
597 mark_page_dirty(kvm, cur_gfn + i);
598 }
15f36ebd 599
1763f8d0
CB		 600 if (fatal_signal_pending(current))
601 return;
70c88a00 602 cond_resched();
15f36ebd 603 }
15f36ebd
JH		 604}
605
b0c632db 606/* Section: vm related */
a6e2f683
ED		 607static void sca_del_vcpu(struct kvm_vcpu *vcpu);
608
b0c632db
HC		 609/*
610 * Get (and clear) the dirty memory log for a memory slot.
611 */
612int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
613 struct kvm_dirty_log *log)
614{
15f36ebd
JH		 615 int r;
616 unsigned long n;
9f6b8029 617 struct kvm_memslots *slots;
15f36ebd
JH		 618 struct kvm_memory_slot *memslot;
619 int is_dirty = 0;
620
e1e8a962
JF		 621 if (kvm_is_ucontrol(kvm))
622 return -EINVAL;
623
15f36ebd
JH		 624 mutex_lock(&kvm->slots_lock);
625
626 r = -EINVAL;
627 if (log->slot >= KVM_USER_MEM_SLOTS)
628 goto out;
629
9f6b8029
PB		 630 slots = kvm_memslots(kvm);
631 memslot = id_to_memslot(slots, log->slot);
15f36ebd
JH		 632 r = -ENOENT;
633 if (!memslot->dirty_bitmap)
634 goto out;
635
636 kvm_s390_sync_dirty_log(kvm, memslot);
637 r = kvm_get_dirty_log(kvm, log, &is_dirty);
638 if (r)
639 goto out;
640
641 /* Clear the dirty log */
642 if (is_dirty) {
643 n = kvm_dirty_bitmap_bytes(memslot);
644 memset(memslot->dirty_bitmap, 0, n);
645 }
646 r = 0;
647out:
648 mutex_unlock(&kvm->slots_lock);
649 return r;
b0c632db
HC		 650}
651
6502a34c
DH		 652static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
653{
654 unsigned int i;
655 struct kvm_vcpu *vcpu;
656
657 kvm_for_each_vcpu(i, vcpu, kvm) {
658 kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu);
659 }
660}
661
e5d83c74 662int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
d938dc55
CH		 663{
664 int r;
665
666 if (cap->flags)
667 return -EINVAL;
668
669 switch (cap->cap) {
84223598 670 case KVM_CAP_S390_IRQCHIP:
c92ea7b9 671 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
84223598
CH		 672 kvm->arch.use_irqchip = 1;
673 r = 0;
674 break;
2444b352 675 case KVM_CAP_S390_USER_SIGP:
c92ea7b9 676 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
2444b352
DH		 677 kvm->arch.user_sigp = 1;
678 r = 0;
679 break;
68c55750 680 case KVM_CAP_S390_VECTOR_REGISTERS:
5967c17b 681 mutex_lock(&kvm->lock);
a03825bb 682 if (kvm->created_vcpus) {
5967c17b
DH		 683 r = -EBUSY;
684 } else if (MACHINE_HAS_VX) {
c54f0d6a
DH		 685 set_kvm_facility(kvm->arch.model.fac_mask, 129);
686 set_kvm_facility(kvm->arch.model.fac_list, 129);
2f87d942
GH		 687 if (test_facility(134)) {
688 set_kvm_facility(kvm->arch.model.fac_mask, 134);
689 set_kvm_facility(kvm->arch.model.fac_list, 134);
690 }
53743aa7
MS		 691 if (test_facility(135)) {
692 set_kvm_facility(kvm->arch.model.fac_mask, 135);
693 set_kvm_facility(kvm->arch.model.fac_list, 135);
694 }
7832e91c
CB		 695 if (test_facility(148)) {
696 set_kvm_facility(kvm->arch.model.fac_mask, 148);
697 set_kvm_facility(kvm->arch.model.fac_list, 148);
698 }
d5cb6ab1
CB		 699 if (test_facility(152)) {
700 set_kvm_facility(kvm->arch.model.fac_mask, 152);
701 set_kvm_facility(kvm->arch.model.fac_list, 152);
702 }
18280d8b
MM		 703 r = 0;
704 } else
705 r = -EINVAL;
5967c17b 706 mutex_unlock(&kvm->lock);
c92ea7b9
CB		 707 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
708 r ? "(not available)" : "(success)");
68c55750 709 break;
c6e5f166
FZ		 710 case KVM_CAP_S390_RI:
711 r = -EINVAL;
712 mutex_lock(&kvm->lock);
a03825bb 713 if (kvm->created_vcpus) {
c6e5f166
FZ		 714 r = -EBUSY;
715 } else if (test_facility(64)) {
c54f0d6a
DH		 716 set_kvm_facility(kvm->arch.model.fac_mask, 64);
717 set_kvm_facility(kvm->arch.model.fac_list, 64);
c6e5f166
FZ		 718 r = 0;
719 }
720 mutex_unlock(&kvm->lock);
721 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
722 r ? "(not available)" : "(success)");
723 break;
47a4693e
YMZ		 724 case KVM_CAP_S390_AIS:
725 mutex_lock(&kvm->lock);
726 if (kvm->created_vcpus) {
727 r = -EBUSY;
728 } else {
729 set_kvm_facility(kvm->arch.model.fac_mask, 72);
730 set_kvm_facility(kvm->arch.model.fac_list, 72);
47a4693e
YMZ		 731 r = 0;
732 }
733 mutex_unlock(&kvm->lock);
734 VM_EVENT(kvm, 3, "ENABLE: AIS %s",
735 r ? "(not available)" : "(success)");
736 break;
4e0b1ab7
FZ		 737 case KVM_CAP_S390_GS:
738 r = -EINVAL;
739 mutex_lock(&kvm->lock);
241e3ec0 740 if (kvm->created_vcpus) {
4e0b1ab7
FZ		 741 r = -EBUSY;
742 } else if (test_facility(133)) {
743 set_kvm_facility(kvm->arch.model.fac_mask, 133);
744 set_kvm_facility(kvm->arch.model.fac_list, 133);
745 r = 0;
746 }
747 mutex_unlock(&kvm->lock);
748 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s",
749 r ? "(not available)" : "(success)");
750 break;
a4499382
JF		 751 case KVM_CAP_S390_HPAGE_1M:
752 mutex_lock(&kvm->lock);
753 if (kvm->created_vcpus)
754 r = -EBUSY;
40ebdb8e 755 else if (!hpage || kvm->arch.use_cmma || kvm_is_ucontrol(kvm))
a4499382
JF		 756 r = -EINVAL;
757 else {
758 r = 0;
df88f318 759 down_write(&kvm->mm->mmap_sem);
a4499382 760 kvm->mm->context.allow_gmap_hpage_1m = 1;
df88f318 761 up_write(&kvm->mm->mmap_sem);
a4499382
JF		 762 /*
763 * We might have to create fake 4k page
764 * tables. To avoid that the hardware works on
765 * stale PGSTEs, we emulate these instructions.
766 */
767 kvm->arch.use_skf = 0;
768 kvm->arch.use_pfmfi = 0;
769 }
770 mutex_unlock(&kvm->lock);
771 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_HPAGE %s",
772 r ? "(not available)" : "(success)");
773 break;
e44fc8c9 774 case KVM_CAP_S390_USER_STSI:
c92ea7b9 775 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
e44fc8c9
ET		 776 kvm->arch.user_stsi = 1;
777 r = 0;
778 break;
6502a34c
DH		 779 case KVM_CAP_S390_USER_INSTR0:
780 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0");
781 kvm->arch.user_instr0 = 1;
782 icpt_operexc_on_all_vcpus(kvm);
783 r = 0;
784 break;
d938dc55
CH		 785 default:
786 r = -EINVAL;
787 break;
788 }
789 return r;
790}
791
8c0a7ce6
DD		 792static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
793{
794 int ret;
795
796 switch (attr->attr) {
797 case KVM_S390_VM_MEM_LIMIT_SIZE:
798 ret = 0;
c92ea7b9 799 VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
a3a92c31
DD		 800 kvm->arch.mem_limit);
801 if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
8c0a7ce6
DD		 802 ret = -EFAULT;
803 break;
804 default:
805 ret = -ENXIO;
806 break;
807 }
808 return ret;
809}
810
811static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
4f718eab
DD		 812{
813 int ret;
814 unsigned int idx;
815 switch (attr->attr) {
816 case KVM_S390_VM_MEM_ENABLE_CMMA:
f9cbd9b0 817 ret = -ENXIO;
c24cc9c8 818 if (!sclp.has_cmma)
e6db1d61
DD		 819 break;
820
c92ea7b9 821 VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
4f718eab 822 mutex_lock(&kvm->lock);
a4499382
JF		 823 if (kvm->created_vcpus)
824 ret = -EBUSY;
825 else if (kvm->mm->context.allow_gmap_hpage_1m)
826 ret = -EINVAL;
827 else {
4f718eab 828 kvm->arch.use_cmma = 1;
c9f0a2b8
JF		 829 /* Not compatible with cmma. */
830 kvm->arch.use_pfmfi = 0;
4f718eab
DD		 831 ret = 0;
832 }
833 mutex_unlock(&kvm->lock);
834 break;
835 case KVM_S390_VM_MEM_CLR_CMMA:
f9cbd9b0
DH		 836 ret = -ENXIO;
837 if (!sclp.has_cmma)
838 break;
c3489155
DD		 839 ret = -EINVAL;
840 if (!kvm->arch.use_cmma)
841 break;
842
c92ea7b9 843 VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
4f718eab
DD		 844 mutex_lock(&kvm->lock);
845 idx = srcu_read_lock(&kvm->srcu);
a13cff31 846 s390_reset_cmma(kvm->arch.gmap->mm);
4f718eab
DD		 847 srcu_read_unlock(&kvm->srcu, idx);
848 mutex_unlock(&kvm->lock);
849 ret = 0;
850 break;
8c0a7ce6
DD		 851 case KVM_S390_VM_MEM_LIMIT_SIZE: {
852 unsigned long new_limit;
853
854 if (kvm_is_ucontrol(kvm))
855 return -EINVAL;
856
857 if (get_user(new_limit, (u64 __user *)attr->addr))
858 return -EFAULT;
859
a3a92c31
DD		 860 if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
861 new_limit > kvm->arch.mem_limit)
8c0a7ce6
DD		 862 return -E2BIG;
863
a3a92c31
DD		 864 if (!new_limit)
865 return -EINVAL;
866
6ea427bb 867 /* gmap_create takes last usable address */
a3a92c31
DD		 868 if (new_limit != KVM_S390_NO_MEM_LIMIT)
869 new_limit -= 1;
870
8c0a7ce6
DD		 871 ret = -EBUSY;
872 mutex_lock(&kvm->lock);
a03825bb 873 if (!kvm->created_vcpus) {
6ea427bb
MS		 874 /* gmap_create will round the limit up */
875 struct gmap *new = gmap_create(current->mm, new_limit);
8c0a7ce6
DD		 876
877 if (!new) {
878 ret = -ENOMEM;
879 } else {
6ea427bb 880 gmap_remove(kvm->arch.gmap);
8c0a7ce6
DD		 881 new->private = kvm;
882 kvm->arch.gmap = new;
883 ret = 0;
884 }
885 }
886 mutex_unlock(&kvm->lock);
a3a92c31
DD		 887 VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit);
888 VM_EVENT(kvm, 3, "New guest asce: 0x%pK",
889 (void *) kvm->arch.gmap->asce);
8c0a7ce6
DD		 890 break;
891 }
4f718eab
DD		 892 default:
893 ret = -ENXIO;
894 break;
895 }
896 return ret;
897}
898
a374e892
TK		 899static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);
900
20c922f0 901void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm)
a374e892
TK		 902{
903 struct kvm_vcpu *vcpu;
904 int i;
905
20c922f0
TK		 906 kvm_s390_vcpu_block_all(kvm);
907
3194cdb7 908 kvm_for_each_vcpu(i, vcpu, kvm) {
20c922f0 909 kvm_s390_vcpu_crypto_setup(vcpu);
3194cdb7
DH		 910 /* recreate the shadow crycb by leaving the VSIE handler */
911 kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu);
912 }
20c922f0
TK		 913
914 kvm_s390_vcpu_unblock_all(kvm);
915}
916
917static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
918{
a374e892
TK		 919 mutex_lock(&kvm->lock);
920 switch (attr->attr) {
921 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
8e41bd54
CB		 922 if (!test_kvm_facility(kvm, 76)) {
923 mutex_unlock(&kvm->lock);
37940fb0 924 return -EINVAL;
8e41bd54 925 }
a374e892
TK		 926 get_random_bytes(
927 kvm->arch.crypto.crycb->aes_wrapping_key_mask,
928 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
929 kvm->arch.crypto.aes_kw = 1;
c92ea7b9 930 VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
a374e892
TK		 931 break;
932 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
8e41bd54
CB		 933 if (!test_kvm_facility(kvm, 76)) {
934 mutex_unlock(&kvm->lock);
37940fb0 935 return -EINVAL;
8e41bd54 936 }
a374e892
TK		 937 get_random_bytes(
938 kvm->arch.crypto.crycb->dea_wrapping_key_mask,
939 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
940 kvm->arch.crypto.dea_kw = 1;
c92ea7b9 941 VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
a374e892
TK		 942 break;
943 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
8e41bd54
CB		 944 if (!test_kvm_facility(kvm, 76)) {
945 mutex_unlock(&kvm->lock);
37940fb0 946 return -EINVAL;
8e41bd54 947 }
a374e892
TK		 948 kvm->arch.crypto.aes_kw = 0;
949 memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0,
950 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
c92ea7b9 951 VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
a374e892
TK		 952 break;
953 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
8e41bd54
CB		 954 if (!test_kvm_facility(kvm, 76)) {
955 mutex_unlock(&kvm->lock);
37940fb0 956 return -EINVAL;
8e41bd54 957 }
a374e892
TK		 958 kvm->arch.crypto.dea_kw = 0;
959 memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0,
960 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
c92ea7b9 961 VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
a374e892 962 break;
37940fb0
TK		 963 case KVM_S390_VM_CRYPTO_ENABLE_APIE:
964 if (!ap_instructions_available()) {
965 mutex_unlock(&kvm->lock);
966 return -EOPNOTSUPP;
967 }
968 kvm->arch.crypto.apie = 1;
969 break;
970 case KVM_S390_VM_CRYPTO_DISABLE_APIE:
971 if (!ap_instructions_available()) {
972 mutex_unlock(&kvm->lock);
973 return -EOPNOTSUPP;
974 }
975 kvm->arch.crypto.apie = 0;
976 break;
a374e892
TK		 977 default:
978 mutex_unlock(&kvm->lock);
979 return -ENXIO;
980 }
981
20c922f0 982 kvm_s390_vcpu_crypto_reset_all(kvm);
a374e892
TK		 983 mutex_unlock(&kvm->lock);
984 return 0;
985}
986
190df4a2
CI		 987static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req)
988{
989 int cx;
990 struct kvm_vcpu *vcpu;
991
992 kvm_for_each_vcpu(cx, vcpu, kvm)
993 kvm_s390_sync_request(req, vcpu);
994}
995
996/*
997 * Must be called with kvm->srcu held to avoid races on memslots, and with
1de1ea7e 998 * kvm->slots_lock to avoid races with ourselves and kvm_s390_vm_stop_migration.
190df4a2
CI		 999 */
1000static int kvm_s390_vm_start_migration(struct kvm *kvm)
1001{
190df4a2 1002 struct kvm_memory_slot *ms;
190df4a2 1003 struct kvm_memslots *slots;
afdad616 1004 unsigned long ram_pages = 0;
190df4a2
CI		 1005 int slotnr;
1006
1007 /* migration mode already enabled */
afdad616 1008 if (kvm->arch.migration_mode)
190df4a2 1009 return 0;
190df4a2
CI		 1010 slots = kvm_memslots(kvm);
1011 if (!slots || !slots->used_slots)
1012 return -EINVAL;
1013
afdad616
CI		 1014 if (!kvm->arch.use_cmma) {
1015 kvm->arch.migration_mode = 1;
1016 return 0;
1017 }
1018 /* mark all the pages in active slots as dirty */
1019 for (slotnr = 0; slotnr < slots->used_slots; slotnr++) {
1020 ms = slots->memslots + slotnr;
13a17cc0
IM		 1021 if (!ms->dirty_bitmap)
1022 return -EINVAL;
190df4a2 1023 /*
afdad616
CI		 1024 * The second half of the bitmap is only used on x86,
1025 * and would be wasted otherwise, so we put it to good
1026 * use here to keep track of the state of the storage
1027 * attributes.
190df4a2 1028 */
afdad616
CI		 1029 memset(kvm_second_dirty_bitmap(ms), 0xff, kvm_dirty_bitmap_bytes(ms));
1030 ram_pages += ms->npages;
190df4a2 1031 }
afdad616
CI		 1032 atomic64_set(&kvm->arch.cmma_dirty_pages, ram_pages);
1033 kvm->arch.migration_mode = 1;
1034 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_START_MIGRATION);
190df4a2
CI		 1035 return 0;
1036}
1037
1038/*
1de1ea7e 1039 * Must be called with kvm->slots_lock to avoid races with ourselves and
190df4a2
CI		 1040 * kvm_s390_vm_start_migration.
1041 */
1042static int kvm_s390_vm_stop_migration(struct kvm *kvm)
1043{
190df4a2 1044 /* migration mode already disabled */
afdad616 1045 if (!kvm->arch.migration_mode)
190df4a2 1046 return 0;
afdad616
CI		 1047 kvm->arch.migration_mode = 0;
1048 if (kvm->arch.use_cmma)
190df4a2 1049 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION);
190df4a2
CI		 1050 return 0;
1051}
1052
1053static int kvm_s390_vm_set_migration(struct kvm *kvm,
1054 struct kvm_device_attr *attr)
1055{
1de1ea7e 1056 int res = -ENXIO;
190df4a2 1057
1de1ea7e 1058 mutex_lock(&kvm->slots_lock);
190df4a2
CI		 1059 switch (attr->attr) {
1060 case KVM_S390_VM_MIGRATION_START:
190df4a2 1061 res = kvm_s390_vm_start_migration(kvm);
190df4a2
CI		 1062 break;
1063 case KVM_S390_VM_MIGRATION_STOP:
1064 res = kvm_s390_vm_stop_migration(kvm);
1065 break;
1066 default:
1067 break;
1068 }
1de1ea7e 1069 mutex_unlock(&kvm->slots_lock);
190df4a2
CI		 1070
1071 return res;
1072}
1073
1074static int kvm_s390_vm_get_migration(struct kvm *kvm,
1075 struct kvm_device_attr *attr)
1076{
afdad616 1077 u64 mig = kvm->arch.migration_mode;
190df4a2
CI		 1078
1079 if (attr->attr != KVM_S390_VM_MIGRATION_STATUS)
1080 return -ENXIO;
1081
1082 if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig)))
1083 return -EFAULT;
1084 return 0;
1085}
1086
8fa1696e
CW		 1087static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
1088{
1089 struct kvm_s390_vm_tod_clock gtod;
1090
1091 if (copy_from_user(&gtod, (void __user *)attr->addr, sizeof(gtod)))
1092 return -EFAULT;
1093
0e7def5f 1094 if (!test_kvm_facility(kvm, 139) && gtod.epoch_idx)
8fa1696e 1095 return -EINVAL;
0e7def5f 1096 kvm_s390_set_tod_clock(kvm, &gtod);
8fa1696e
CW		 1097
1098 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx",
1099 gtod.epoch_idx, gtod.tod);
1100
1101 return 0;
1102}
1103
72f25020
JH		 1104static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
1105{
1106 u8 gtod_high;
1107
1108 if (copy_from_user(&gtod_high, (void __user *)attr->addr,
1109 sizeof(gtod_high)))
1110 return -EFAULT;
1111
1112 if (gtod_high != 0)
1113 return -EINVAL;
58c383c6 1114 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
72f25020
JH		 1115
1116 return 0;
1117}
1118
1119static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
1120{
0e7def5f 1121 struct kvm_s390_vm_tod_clock gtod = { 0 };
72f25020 1122
0e7def5f
DH		 1123 if (copy_from_user(&gtod.tod, (void __user *)attr->addr,
1124 sizeof(gtod.tod)))
72f25020
JH		 1125 return -EFAULT;
1126
0e7def5f
DH		 1127 kvm_s390_set_tod_clock(kvm, &gtod);
1128 VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod.tod);
72f25020
JH		 1129 return 0;
1130}
1131
1132static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
1133{
1134 int ret;
1135
1136 if (attr->flags)
1137 return -EINVAL;
1138
1139 switch (attr->attr) {
8fa1696e
CW		 1140 case KVM_S390_VM_TOD_EXT:
1141 ret = kvm_s390_set_tod_ext(kvm, attr);
1142 break;
72f25020
JH		 1143 case KVM_S390_VM_TOD_HIGH:
1144 ret = kvm_s390_set_tod_high(kvm, attr);
1145 break;
1146 case KVM_S390_VM_TOD_LOW:
1147 ret = kvm_s390_set_tod_low(kvm, attr);
1148 break;
1149 default:
1150 ret = -ENXIO;
1151 break;
1152 }
1153 return ret;
1154}
1155
33d1b272
DH		 1156static void kvm_s390_get_tod_clock(struct kvm *kvm,
1157 struct kvm_s390_vm_tod_clock *gtod)
8fa1696e
CW		 1158{
1159 struct kvm_s390_tod_clock_ext htod;
1160
1161 preempt_disable();
1162
1163 get_tod_clock_ext((char *)&htod);
1164
1165 gtod->tod = htod.tod + kvm->arch.epoch;
33d1b272
DH		 1166 gtod->epoch_idx = 0;
1167 if (test_kvm_facility(kvm, 139)) {
1168 gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;
1169 if (gtod->tod < htod.tod)
1170 gtod->epoch_idx += 1;
1171 }
8fa1696e
CW		 1172
1173 preempt_enable();
1174}
1175
1176static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
1177{
1178 struct kvm_s390_vm_tod_clock gtod;
1179
1180 memset(&gtod, 0, sizeof(gtod));
33d1b272 1181 kvm_s390_get_tod_clock(kvm, &gtod);
8fa1696e
CW		 1182 if (copy_to_user((void __user *)attr->addr, &gtod, sizeof(gtod)))
1183 return -EFAULT;
1184
1185 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x, TOD base: 0x%llx",
1186 gtod.epoch_idx, gtod.tod);
1187 return 0;
1188}
1189
72f25020
JH		 1190static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
1191{
1192 u8 gtod_high = 0;
1193
1194 if (copy_to_user((void __user *)attr->addr, &gtod_high,
1195 sizeof(gtod_high)))
1196 return -EFAULT;
58c383c6 1197 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
72f25020
JH		 1198
1199 return 0;
1200}
1201
1202static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
1203{
5a3d883a 1204 u64 gtod;
72f25020 1205
60417fcc 1206 gtod = kvm_s390_get_tod_clock_fast(kvm);
72f25020
JH		 1207 if (copy_to_user((void __user *)attr->addr, &gtod, sizeof(gtod)))
1208 return -EFAULT;
58c383c6 1209 VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
72f25020
JH		 1210
1211 return 0;
1212}
1213
1214static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
1215{
1216 int ret;
1217
1218 if (attr->flags)
1219 return -EINVAL;
1220
1221 switch (attr->attr) {
8fa1696e
CW		 1222 case KVM_S390_VM_TOD_EXT:
1223 ret = kvm_s390_get_tod_ext(kvm, attr);
1224 break;
72f25020
JH		 1225 case KVM_S390_VM_TOD_HIGH:
1226 ret = kvm_s390_get_tod_high(kvm, attr);
1227 break;
1228 case KVM_S390_VM_TOD_LOW:
1229 ret = kvm_s390_get_tod_low(kvm, attr);
1230 break;
1231 default:
1232 ret = -ENXIO;
1233 break;
1234 }
1235 return ret;
1236}
1237
658b6eda
MM		 1238static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
1239{
1240 struct kvm_s390_vm_cpu_processor *proc;
053dd230 1241 u16 lowest_ibc, unblocked_ibc;
658b6eda
MM		 1242 int ret = 0;
1243
1244 mutex_lock(&kvm->lock);
a03825bb 1245 if (kvm->created_vcpus) {
658b6eda
MM		 1246 ret = -EBUSY;
1247 goto out;
1248 }
1249 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
1250 if (!proc) {
1251 ret = -ENOMEM;
1252 goto out;
1253 }
1254 if (!copy_from_user(proc, (void __user *)attr->addr,
1255 sizeof(*proc))) {
9bb0ec09 1256 kvm->arch.model.cpuid = proc->cpuid;
053dd230
DH		 1257 lowest_ibc = sclp.ibc >> 16 & 0xfff;
1258 unblocked_ibc = sclp.ibc & 0xfff;
0487c44d 1259 if (lowest_ibc && proc->ibc) {
053dd230
DH		 1260 if (proc->ibc > unblocked_ibc)
1261 kvm->arch.model.ibc = unblocked_ibc;
1262 else if (proc->ibc < lowest_ibc)
1263 kvm->arch.model.ibc = lowest_ibc;
1264 else
1265 kvm->arch.model.ibc = proc->ibc;
1266 }
c54f0d6a 1267 memcpy(kvm->arch.model.fac_list, proc->fac_list,
658b6eda 1268 S390_ARCH_FAC_LIST_SIZE_BYTE);
a8c39dd7
CB		 1269 VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
1270 kvm->arch.model.ibc,
1271 kvm->arch.model.cpuid);
1272 VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1273 kvm->arch.model.fac_list[0],
1274 kvm->arch.model.fac_list[1],
1275 kvm->arch.model.fac_list[2]);
658b6eda
MM		 1276 } else
1277 ret = -EFAULT;
1278 kfree(proc);
1279out:
1280 mutex_unlock(&kvm->lock);
1281 return ret;
1282}
1283
15c9705f
DH		 1284static int kvm_s390_set_processor_feat(struct kvm *kvm,
1285 struct kvm_device_attr *attr)
1286{
1287 struct kvm_s390_vm_cpu_feat data;
15c9705f
DH		 1288
1289 if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
1290 return -EFAULT;
1291 if (!bitmap_subset((unsigned long *) data.feat,
1292 kvm_s390_available_cpu_feat,
1293 KVM_S390_VM_CPU_FEAT_NR_BITS))
1294 return -EINVAL;
1295
1296 mutex_lock(&kvm->lock);
2f8311c9
CB		 1297 if (kvm->created_vcpus) {
1298 mutex_unlock(&kvm->lock);
1299 return -EBUSY;
15c9705f 1300 }
2f8311c9
CB		 1301 bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
1302 KVM_S390_VM_CPU_FEAT_NR_BITS);
15c9705f 1303 mutex_unlock(&kvm->lock);
2f8311c9
CB		 1304 VM_EVENT(kvm, 3, "SET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1305 data.feat[0],
1306 data.feat[1],
1307 data.feat[2]);
1308 return 0;
15c9705f
DH		 1309}
1310
0a763c78
DH		 1311static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
1312 struct kvm_device_attr *attr)
1313{
346fa2f8
CB		 1314 mutex_lock(&kvm->lock);
1315 if (kvm->created_vcpus) {
1316 mutex_unlock(&kvm->lock);
1317 return -EBUSY;
1318 }
1319
1320 if (copy_from_user(&kvm->arch.model.subfuncs, (void __user *)attr->addr,
1321 sizeof(struct kvm_s390_vm_cpu_subfunc))) {
1322 mutex_unlock(&kvm->lock);
1323 return -EFAULT;
1324 }
1325 mutex_unlock(&kvm->lock);
1326
11ba5961
CB		 1327 VM_EVENT(kvm, 3, "SET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1328 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
1329 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
1330 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
1331 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
1332 VM_EVENT(kvm, 3, "SET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
1333 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
1334 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
1335 VM_EVENT(kvm, 3, "SET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
1336 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
1337 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
1338 VM_EVENT(kvm, 3, "SET: guest KMC subfunc 0x%16.16lx.%16.16lx",
1339 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
1340 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
1341 VM_EVENT(kvm, 3, "SET: guest KM subfunc 0x%16.16lx.%16.16lx",
1342 ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
1343 ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
1344 VM_EVENT(kvm, 3, "SET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
1345 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
1346 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
1347 VM_EVENT(kvm, 3, "SET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
1348 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
1349 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
1350 VM_EVENT(kvm, 3, "SET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
1351 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
1352 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
1353 VM_EVENT(kvm, 3, "SET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
1354 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
1355 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
1356 VM_EVENT(kvm, 3, "SET: guest KMF subfunc 0x%16.16lx.%16.16lx",
1357 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
1358 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
1359 VM_EVENT(kvm, 3, "SET: guest KMO subfunc 0x%16.16lx.%16.16lx",
1360 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
1361 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
1362 VM_EVENT(kvm, 3, "SET: guest PCC subfunc 0x%16.16lx.%16.16lx",
1363 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
1364 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
1365 VM_EVENT(kvm, 3, "SET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
1366 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
1367 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
1368 VM_EVENT(kvm, 3, "SET: guest KMA subfunc 0x%16.16lx.%16.16lx",
1369 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
1370 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
13209ad0
CB		 1371 VM_EVENT(kvm, 3, "SET: guest KDSA subfunc 0x%16.16lx.%16.16lx",
1372 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0],
1373 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]);
173aec2d
CB		 1374 VM_EVENT(kvm, 3, "SET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1375 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0],
1376 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1],
1377 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2],
1378 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]);
4f45b90e
CB		 1379 VM_EVENT(kvm, 3, "SET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1380 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0],
1381 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1],
1382 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2],
1383 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]);
11ba5961 1384
346fa2f8 1385 return 0;
0a763c78
DH		 1386}
1387
658b6eda
MM		 1388static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1389{
1390 int ret = -ENXIO;
1391
1392 switch (attr->attr) {
1393 case KVM_S390_VM_CPU_PROCESSOR:
1394 ret = kvm_s390_set_processor(kvm, attr);
1395 break;
15c9705f
DH		 1396 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1397 ret = kvm_s390_set_processor_feat(kvm, attr);
1398 break;
0a763c78
DH		 1399 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1400 ret = kvm_s390_set_processor_subfunc(kvm, attr);
1401 break;
658b6eda
MM		 1402 }
1403 return ret;
1404}
1405
1406static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
1407{
1408 struct kvm_s390_vm_cpu_processor *proc;
1409 int ret = 0;
1410
1411 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
1412 if (!proc) {
1413 ret = -ENOMEM;
1414 goto out;
1415 }
9bb0ec09 1416 proc->cpuid = kvm->arch.model.cpuid;
658b6eda 1417 proc->ibc = kvm->arch.model.ibc;
c54f0d6a
DH		 1418 memcpy(&proc->fac_list, kvm->arch.model.fac_list,
1419 S390_ARCH_FAC_LIST_SIZE_BYTE);
a8c39dd7
CB		 1420 VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
1421 kvm->arch.model.ibc,
1422 kvm->arch.model.cpuid);
1423 VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1424 kvm->arch.model.fac_list[0],
1425 kvm->arch.model.fac_list[1],
1426 kvm->arch.model.fac_list[2]);
658b6eda
MM		 1427 if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
1428 ret = -EFAULT;
1429 kfree(proc);
1430out:
1431 return ret;
1432}
1433
1434static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
1435{
1436 struct kvm_s390_vm_cpu_machine *mach;
1437 int ret = 0;
1438
1439 mach = kzalloc(sizeof(*mach), GFP_KERNEL);
1440 if (!mach) {
1441 ret = -ENOMEM;
1442 goto out;
1443 }
1444 get_cpu_id((struct cpuid *) &mach->cpuid);
37c5f6c8 1445 mach->ibc = sclp.ibc;
c54f0d6a 1446 memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
981467c9 1447 S390_ARCH_FAC_LIST_SIZE_BYTE);
658b6eda 1448 memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
04478197 1449 sizeof(S390_lowcore.stfle_fac_list));
a8c39dd7
CB		 1450 VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx",
1451 kvm->arch.model.ibc,
1452 kvm->arch.model.cpuid);
1453 VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx",
1454 mach->fac_mask[0],
1455 mach->fac_mask[1],
1456 mach->fac_mask[2]);
1457 VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1458 mach->fac_list[0],
1459 mach->fac_list[1],
1460 mach->fac_list[2]);
658b6eda
MM		 1461 if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
1462 ret = -EFAULT;
1463 kfree(mach);
1464out:
1465 return ret;
1466}
1467
15c9705f
DH		 1468static int kvm_s390_get_processor_feat(struct kvm *kvm,
1469 struct kvm_device_attr *attr)
1470{
1471 struct kvm_s390_vm_cpu_feat data;
1472
1473 bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat,
1474 KVM_S390_VM_CPU_FEAT_NR_BITS);
1475 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
1476 return -EFAULT;
2f8311c9
CB		 1477 VM_EVENT(kvm, 3, "GET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1478 data.feat[0],
1479 data.feat[1],
1480 data.feat[2]);
15c9705f
DH		 1481 return 0;
1482}
1483
1484static int kvm_s390_get_machine_feat(struct kvm *kvm,
1485 struct kvm_device_attr *attr)
1486{
1487 struct kvm_s390_vm_cpu_feat data;
1488
1489 bitmap_copy((unsigned long *) data.feat,
1490 kvm_s390_available_cpu_feat,
1491 KVM_S390_VM_CPU_FEAT_NR_BITS);
1492 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
1493 return -EFAULT;
2f8311c9
CB		 1494 VM_EVENT(kvm, 3, "GET: host feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1495 data.feat[0],
1496 data.feat[1],
1497 data.feat[2]);
15c9705f
DH		 1498 return 0;
1499}
1500
0a763c78
DH		 1501static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
1502 struct kvm_device_attr *attr)
1503{
346fa2f8
CB		 1504 if (copy_to_user((void __user *)attr->addr, &kvm->arch.model.subfuncs,
1505 sizeof(struct kvm_s390_vm_cpu_subfunc)))
1506 return -EFAULT;
1507
11ba5961
CB		 1508 VM_EVENT(kvm, 3, "GET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1509 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
1510 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
1511 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
1512 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
1513 VM_EVENT(kvm, 3, "GET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
1514 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
1515 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
1516 VM_EVENT(kvm, 3, "GET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
1517 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
1518 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
1519 VM_EVENT(kvm, 3, "GET: guest KMC subfunc 0x%16.16lx.%16.16lx",
1520 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
1521 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
1522 VM_EVENT(kvm, 3, "GET: guest KM subfunc 0x%16.16lx.%16.16lx",
1523 ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
1524 ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
1525 VM_EVENT(kvm, 3, "GET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
1526 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
1527 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
1528 VM_EVENT(kvm, 3, "GET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
1529 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
1530 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
1531 VM_EVENT(kvm, 3, "GET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
1532 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
1533 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
1534 VM_EVENT(kvm, 3, "GET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
1535 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
1536 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
1537 VM_EVENT(kvm, 3, "GET: guest KMF subfunc 0x%16.16lx.%16.16lx",
1538 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
1539 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
1540 VM_EVENT(kvm, 3, "GET: guest KMO subfunc 0x%16.16lx.%16.16lx",
1541 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
1542 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
1543 VM_EVENT(kvm, 3, "GET: guest PCC subfunc 0x%16.16lx.%16.16lx",
1544 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
1545 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
1546 VM_EVENT(kvm, 3, "GET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
1547 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
1548 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
1549 VM_EVENT(kvm, 3, "GET: guest KMA subfunc 0x%16.16lx.%16.16lx",
1550 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
1551 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
13209ad0
CB		 1552 VM_EVENT(kvm, 3, "GET: guest KDSA subfunc 0x%16.16lx.%16.16lx",
1553 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0],
1554 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]);
173aec2d
CB		 1555 VM_EVENT(kvm, 3, "GET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1556 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0],
1557 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1],
1558 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2],
1559 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]);
4f45b90e
CB		 1560 VM_EVENT(kvm, 3, "GET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1561 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0],
1562 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1],
1563 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2],
1564 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]);
11ba5961 1565
346fa2f8 1566 return 0;
0a763c78
DH		 1567}
1568
1569static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
1570 struct kvm_device_attr *attr)
1571{
1572 if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
1573 sizeof(struct kvm_s390_vm_cpu_subfunc)))
1574 return -EFAULT;
11ba5961
CB		 1575
1576 VM_EVENT(kvm, 3, "GET: host PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1577 ((unsigned long *) &kvm_s390_available_subfunc.plo)[0],
1578 ((unsigned long *) &kvm_s390_available_subfunc.plo)[1],
1579 ((unsigned long *) &kvm_s390_available_subfunc.plo)[2],
1580 ((unsigned long *) &kvm_s390_available_subfunc.plo)[3]);
1581 VM_EVENT(kvm, 3, "GET: host PTFF subfunc 0x%16.16lx.%16.16lx",
1582 ((unsigned long *) &kvm_s390_available_subfunc.ptff)[0],
1583 ((unsigned long *) &kvm_s390_available_subfunc.ptff)[1]);
1584 VM_EVENT(kvm, 3, "GET: host KMAC subfunc 0x%16.16lx.%16.16lx",
1585 ((unsigned long *) &kvm_s390_available_subfunc.kmac)[0],
1586 ((unsigned long *) &kvm_s390_available_subfunc.kmac)[1]);
1587 VM_EVENT(kvm, 3, "GET: host KMC subfunc 0x%16.16lx.%16.16lx",
1588 ((unsigned long *) &kvm_s390_available_subfunc.kmc)[0],
1589 ((unsigned long *) &kvm_s390_available_subfunc.kmc)[1]);
1590 VM_EVENT(kvm, 3, "GET: host KM subfunc 0x%16.16lx.%16.16lx",
1591 ((unsigned long *) &kvm_s390_available_subfunc.km)[0],
1592 ((unsigned long *) &kvm_s390_available_subfunc.km)[1]);
1593 VM_EVENT(kvm, 3, "GET: host KIMD subfunc 0x%16.16lx.%16.16lx",
1594 ((unsigned long *) &kvm_s390_available_subfunc.kimd)[0],
1595 ((unsigned long *) &kvm_s390_available_subfunc.kimd)[1]);
1596 VM_EVENT(kvm, 3, "GET: host KLMD subfunc 0x%16.16lx.%16.16lx",
1597 ((unsigned long *) &kvm_s390_available_subfunc.klmd)[0],
1598 ((unsigned long *) &kvm_s390_available_subfunc.klmd)[1]);
1599 VM_EVENT(kvm, 3, "GET: host PCKMO subfunc 0x%16.16lx.%16.16lx",
1600 ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[0],
1601 ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[1]);
1602 VM_EVENT(kvm, 3, "GET: host KMCTR subfunc 0x%16.16lx.%16.16lx",
1603 ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[0],
1604 ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[1]);
1605 VM_EVENT(kvm, 3, "GET: host KMF subfunc 0x%16.16lx.%16.16lx",
1606 ((unsigned long *) &kvm_s390_available_subfunc.kmf)[0],
1607 ((unsigned long *) &kvm_s390_available_subfunc.kmf)[1]);
1608 VM_EVENT(kvm, 3, "GET: host KMO subfunc 0x%16.16lx.%16.16lx",
1609 ((unsigned long *) &kvm_s390_available_subfunc.kmo)[0],
1610 ((unsigned long *) &kvm_s390_available_subfunc.kmo)[1]);
1611 VM_EVENT(kvm, 3, "GET: host PCC subfunc 0x%16.16lx.%16.16lx",
1612 ((unsigned long *) &kvm_s390_available_subfunc.pcc)[0],
1613 ((unsigned long *) &kvm_s390_available_subfunc.pcc)[1]);
1614 VM_EVENT(kvm, 3, "GET: host PPNO subfunc 0x%16.16lx.%16.16lx",
1615 ((unsigned long *) &kvm_s390_available_subfunc.ppno)[0],
1616 ((unsigned long *) &kvm_s390_available_subfunc.ppno)[1]);
1617 VM_EVENT(kvm, 3, "GET: host KMA subfunc 0x%16.16lx.%16.16lx",
1618 ((unsigned long *) &kvm_s390_available_subfunc.kma)[0],
1619 ((unsigned long *) &kvm_s390_available_subfunc.kma)[1]);
13209ad0
CB		 1620 VM_EVENT(kvm, 3, "GET: host KDSA subfunc 0x%16.16lx.%16.16lx",
1621 ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[0],
1622 ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[1]);
173aec2d
CB		 1623 VM_EVENT(kvm, 3, "GET: host SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1624 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[0],
1625 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[1],
1626 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[2],
1627 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[3]);
4f45b90e
CB		 1628 VM_EVENT(kvm, 3, "GET: host DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1629 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[0],
1630 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[1],
1631 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[2],
1632 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[3]);
11ba5961 1633
0a763c78
DH		 1634 return 0;
1635}
346fa2f8 1636
658b6eda
MM		 1637static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1638{
1639 int ret = -ENXIO;
1640
1641 switch (attr->attr) {
1642 case KVM_S390_VM_CPU_PROCESSOR:
1643 ret = kvm_s390_get_processor(kvm, attr);
1644 break;
1645 case KVM_S390_VM_CPU_MACHINE:
1646 ret = kvm_s390_get_machine(kvm, attr);
1647 break;
15c9705f
DH		 1648 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1649 ret = kvm_s390_get_processor_feat(kvm, attr);
1650 break;
1651 case KVM_S390_VM_CPU_MACHINE_FEAT:
1652 ret = kvm_s390_get_machine_feat(kvm, attr);
1653 break;
0a763c78
DH		 1654 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1655 ret = kvm_s390_get_processor_subfunc(kvm, attr);
1656 break;
1657 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
1658 ret = kvm_s390_get_machine_subfunc(kvm, attr);
1659 break;
658b6eda
MM		 1660 }
1661 return ret;
1662}
1663
f2061656
DD		 1664static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1665{
1666 int ret;
1667
1668 switch (attr->group) {
4f718eab 1669 case KVM_S390_VM_MEM_CTRL:
8c0a7ce6 1670 ret = kvm_s390_set_mem_control(kvm, attr);
4f718eab 1671 break;
72f25020
JH		 1672 case KVM_S390_VM_TOD:
1673 ret = kvm_s390_set_tod(kvm, attr);
1674 break;
658b6eda
MM		 1675 case KVM_S390_VM_CPU_MODEL:
1676 ret = kvm_s390_set_cpu_model(kvm, attr);
1677 break;
a374e892
TK		 1678 case KVM_S390_VM_CRYPTO:
1679 ret = kvm_s390_vm_set_crypto(kvm, attr);
1680 break;
190df4a2
CI		 1681 case KVM_S390_VM_MIGRATION:
1682 ret = kvm_s390_vm_set_migration(kvm, attr);
1683 break;
f2061656
DD		 1684 default:
1685 ret = -ENXIO;
1686 break;
1687 }
1688
1689 return ret;
1690}
1691
1692static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1693{
8c0a7ce6
DD		 1694 int ret;
1695
1696 switch (attr->group) {
1697 case KVM_S390_VM_MEM_CTRL:
1698 ret = kvm_s390_get_mem_control(kvm, attr);
1699 break;
72f25020
JH		 1700 case KVM_S390_VM_TOD:
1701 ret = kvm_s390_get_tod(kvm, attr);
1702 break;
658b6eda
MM		 1703 case KVM_S390_VM_CPU_MODEL:
1704 ret = kvm_s390_get_cpu_model(kvm, attr);
1705 break;
190df4a2
CI		 1706 case KVM_S390_VM_MIGRATION:
1707 ret = kvm_s390_vm_get_migration(kvm, attr);
1708 break;
8c0a7ce6
DD		 1709 default:
1710 ret = -ENXIO;
1711 break;
1712 }
1713
1714 return ret;
f2061656
DD		 1715}
1716
1717static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1718{
1719 int ret;
1720
1721 switch (attr->group) {
4f718eab
DD		 1722 case KVM_S390_VM_MEM_CTRL:
1723 switch (attr->attr) {
1724 case KVM_S390_VM_MEM_ENABLE_CMMA:
1725 case KVM_S390_VM_MEM_CLR_CMMA:
f9cbd9b0
DH		 1726 ret = sclp.has_cmma ? 0 : -ENXIO;
1727 break;
8c0a7ce6 1728 case KVM_S390_VM_MEM_LIMIT_SIZE:
4f718eab
DD		 1729 ret = 0;
1730 break;
1731 default:
1732 ret = -ENXIO;
1733 break;
1734 }
1735 break;
72f25020
JH		 1736 case KVM_S390_VM_TOD:
1737 switch (attr->attr) {
1738 case KVM_S390_VM_TOD_LOW:
1739 case KVM_S390_VM_TOD_HIGH:
1740 ret = 0;
1741 break;
1742 default:
1743 ret = -ENXIO;
1744 break;
1745 }
1746 break;
658b6eda
MM		 1747 case KVM_S390_VM_CPU_MODEL:
1748 switch (attr->attr) {
1749 case KVM_S390_VM_CPU_PROCESSOR:
1750 case KVM_S390_VM_CPU_MACHINE:
15c9705f
DH		 1751 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1752 case KVM_S390_VM_CPU_MACHINE_FEAT:
0a763c78 1753 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
346fa2f8 1754 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
658b6eda
MM		 1755 ret = 0;
1756 break;
1757 default:
1758 ret = -ENXIO;
1759 break;
1760 }
1761 break;
a374e892
TK		 1762 case KVM_S390_VM_CRYPTO:
1763 switch (attr->attr) {
1764 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
1765 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
1766 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
1767 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
1768 ret = 0;
1769 break;
37940fb0
TK		 1770 case KVM_S390_VM_CRYPTO_ENABLE_APIE:
1771 case KVM_S390_VM_CRYPTO_DISABLE_APIE:
1772 ret = ap_instructions_available() ? 0 : -ENXIO;
1773 break;
a374e892
TK		 1774 default:
1775 ret = -ENXIO;
1776 break;
1777 }
1778 break;
190df4a2
CI		 1779 case KVM_S390_VM_MIGRATION:
1780 ret = 0;
1781 break;
f2061656
DD		 1782 default:
1783 ret = -ENXIO;
1784 break;
1785 }
1786
1787 return ret;
1788}
1789
30ee2a98
JH		 1790static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1791{
1792 uint8_t *keys;
1793 uint64_t hva;
4f899147 1794 int srcu_idx, i, r = 0;
30ee2a98
JH		 1795
1796 if (args->flags != 0)
1797 return -EINVAL;
1798
1799 /* Is this guest using storage keys? */
55531b74 1800 if (!mm_uses_skeys(current->mm))
30ee2a98
JH		 1801 return KVM_S390_GET_SKEYS_NONE;
1802
1803 /* Enforce sane limit on memory allocation */
1804 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1805 return -EINVAL;
1806
752ade68 1807 keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
30ee2a98
JH		 1808 if (!keys)
1809 return -ENOMEM;
1810
d3ed1cee 1811 down_read(&current->mm->mmap_sem);
4f899147 1812 srcu_idx = srcu_read_lock(&kvm->srcu);
30ee2a98
JH		 1813 for (i = 0; i < args->count; i++) {
1814 hva = gfn_to_hva(kvm, args->start_gfn + i);
1815 if (kvm_is_error_hva(hva)) {
1816 r = -EFAULT;
d3ed1cee 1817 break;
30ee2a98
JH		 1818 }
1819
154c8c19
DH		 1820 r = get_guest_storage_key(current->mm, hva, &keys[i]);
1821 if (r)
d3ed1cee 1822 break;
30ee2a98 1823 }
4f899147 1824 srcu_read_unlock(&kvm->srcu, srcu_idx);
d3ed1cee
MS		 1825 up_read(&current->mm->mmap_sem);
1826
1827 if (!r) {
1828 r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
1829 sizeof(uint8_t) * args->count);
1830 if (r)
1831 r = -EFAULT;
30ee2a98
JH		 1832 }
1833
30ee2a98
JH		 1834 kvfree(keys);
1835 return r;
1836}
1837
1838static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1839{
1840 uint8_t *keys;
1841 uint64_t hva;
4f899147 1842 int srcu_idx, i, r = 0;
bd096f64 1843 bool unlocked;
30ee2a98
JH		 1844
1845 if (args->flags != 0)
1846 return -EINVAL;
1847
1848 /* Enforce sane limit on memory allocation */
1849 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1850 return -EINVAL;
1851
752ade68 1852 keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
30ee2a98
JH		 1853 if (!keys)
1854 return -ENOMEM;
1855
1856 r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
1857 sizeof(uint8_t) * args->count);
1858 if (r) {
1859 r = -EFAULT;
1860 goto out;
1861 }
1862
1863 /* Enable storage key handling for the guest */
14d4a425
DD		 1864 r = s390_enable_skey();
1865 if (r)
1866 goto out;
30ee2a98 1867
bd096f64 1868 i = 0;
d3ed1cee 1869 down_read(&current->mm->mmap_sem);
4f899147 1870 srcu_idx = srcu_read_lock(&kvm->srcu);
bd096f64
JF		 1871 while (i < args->count) {
1872 unlocked = false;
30ee2a98
JH		 1873 hva = gfn_to_hva(kvm, args->start_gfn + i);
1874 if (kvm_is_error_hva(hva)) {
1875 r = -EFAULT;
d3ed1cee 1876 break;
30ee2a98
JH		 1877 }
1878
1879 /* Lowest order bit is reserved */
1880 if (keys[i] & 0x01) {
1881 r = -EINVAL;
d3ed1cee 1882 break;
30ee2a98
JH		 1883 }
1884
fe69eabf 1885 r = set_guest_storage_key(current->mm, hva, keys[i], 0);
bd096f64
JF		 1886 if (r) {
1887 r = fixup_user_fault(current, current->mm, hva,
1888 FAULT_FLAG_WRITE, &unlocked);
1889 if (r)
1890 break;
1891 }
1892 if (!r)
1893 i++;
30ee2a98 1894 }
4f899147 1895 srcu_read_unlock(&kvm->srcu, srcu_idx);
d3ed1cee 1896 up_read(&current->mm->mmap_sem);
30ee2a98
JH		 1897out:
1898 kvfree(keys);
1899 return r;
1900}
1901
4036e387
CI		 1902/*
1903 * Base address and length must be sent at the start of each block, therefore
1904 * it's cheaper to send some clean data, as long as it's less than the size of
1905 * two longs.
1906 */
1907#define KVM_S390_MAX_BIT_DISTANCE (2 * sizeof(void *))
1908/* for consistency */
1909#define KVM_S390_CMMA_SIZE_MAX ((u32)KVM_S390_SKEYS_MAX)
1910
afdad616
CI		 1911/*
1912 * Similar to gfn_to_memslot, but returns the index of a memslot also when the
1913 * address falls in a hole. In that case the index of one of the memslots
1914 * bordering the hole is returned.
1915 */
1916static int gfn_to_memslot_approx(struct kvm_memslots *slots, gfn_t gfn)
1917{
1918 int start = 0, end = slots->used_slots;
1919 int slot = atomic_read(&slots->lru_slot);
1920 struct kvm_memory_slot *memslots = slots->memslots;
1921
1922 if (gfn >= memslots[slot].base_gfn &&
1923 gfn < memslots[slot].base_gfn + memslots[slot].npages)
1924 return slot;
1925
1926 while (start < end) {
1927 slot = start + (end - start) / 2;
1928
1929 if (gfn >= memslots[slot].base_gfn)
1930 end = slot;
1931 else
1932 start = slot + 1;
1933 }
1934
1935 if (gfn >= memslots[start].base_gfn &&
1936 gfn < memslots[start].base_gfn + memslots[start].npages) {
1937 atomic_set(&slots->lru_slot, start);
1938 }
1939
1940 return start;
1941}
1942
1943static int kvm_s390_peek_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1944 u8 *res, unsigned long bufsize)
1945{
1946 unsigned long pgstev, hva, cur_gfn = args->start_gfn;
1947
1948 args->count = 0;
1949 while (args->count < bufsize) {
1950 hva = gfn_to_hva(kvm, cur_gfn);
1951 /*
1952 * We return an error if the first value was invalid, but we
1953 * return successfully if at least one value was copied.
1954 */
1955 if (kvm_is_error_hva(hva))
1956 return args->count ? 0 : -EFAULT;
1957 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
1958 pgstev = 0;
1959 res[args->count++] = (pgstev >> 24) & 0x43;
1960 cur_gfn++;
1961 }
1962
1963 return 0;
1964}
1965
1966static unsigned long kvm_s390_next_dirty_cmma(struct kvm_memslots *slots,
1967 unsigned long cur_gfn)
1968{
1969 int slotidx = gfn_to_memslot_approx(slots, cur_gfn);
1970 struct kvm_memory_slot *ms = slots->memslots + slotidx;
1971 unsigned long ofs = cur_gfn - ms->base_gfn;
1972
1973 if (ms->base_gfn + ms->npages <= cur_gfn) {
1974 slotidx--;
1975 /* If we are above the highest slot, wrap around */
1976 if (slotidx < 0)
1977 slotidx = slots->used_slots - 1;
1978
1979 ms = slots->memslots + slotidx;
1980 ofs = 0;
1981 }
1982 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, ofs);
1983 while ((slotidx > 0) && (ofs >= ms->npages)) {
1984 slotidx--;
1985 ms = slots->memslots + slotidx;
1986 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, 0);
1987 }
1988 return ms->base_gfn + ofs;
1989}
1990
1991static int kvm_s390_get_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1992 u8 *res, unsigned long bufsize)
1993{
1994 unsigned long mem_end, cur_gfn, next_gfn, hva, pgstev;
1995 struct kvm_memslots *slots = kvm_memslots(kvm);
1996 struct kvm_memory_slot *ms;
1997
1998 cur_gfn = kvm_s390_next_dirty_cmma(slots, args->start_gfn);
1999 ms = gfn_to_memslot(kvm, cur_gfn);
2000 args->count = 0;
2001 args->start_gfn = cur_gfn;
2002 if (!ms)
2003 return 0;
2004 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2005 mem_end = slots->memslots[0].base_gfn + slots->memslots[0].npages;
2006
2007 while (args->count < bufsize) {
2008 hva = gfn_to_hva(kvm, cur_gfn);
2009 if (kvm_is_error_hva(hva))
2010 return 0;
2011 /* Decrement only if we actually flipped the bit to 0 */
2012 if (test_and_clear_bit(cur_gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms)))
2013 atomic64_dec(&kvm->arch.cmma_dirty_pages);
2014 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
2015 pgstev = 0;
2016 /* Save the value */
2017 res[args->count++] = (pgstev >> 24) & 0x43;
2018 /* If the next bit is too far away, stop. */
2019 if (next_gfn > cur_gfn + KVM_S390_MAX_BIT_DISTANCE)
2020 return 0;
2021 /* If we reached the previous "next", find the next one */
2022 if (cur_gfn == next_gfn)
2023 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2024 /* Reached the end of memory or of the buffer, stop */
2025 if ((next_gfn >= mem_end) ||
2026 (next_gfn - args->start_gfn >= bufsize))
2027 return 0;
2028 cur_gfn++;
2029 /* Reached the end of the current memslot, take the next one. */
2030 if (cur_gfn - ms->base_gfn >= ms->npages) {
2031 ms = gfn_to_memslot(kvm, cur_gfn);
2032 if (!ms)
2033 return 0;
2034 }
2035 }
2036 return 0;
2037}
2038
4036e387
CI		 2039/*
2040 * This function searches for the next page with dirty CMMA attributes, and
2041 * saves the attributes in the buffer up to either the end of the buffer or
2042 * until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found;
2043 * no trailing clean bytes are saved.
2044 * In case no dirty bits were found, or if CMMA was not enabled or used, the
2045 * output buffer will indicate 0 as length.
2046 */
2047static int kvm_s390_get_cmma_bits(struct kvm *kvm,
2048 struct kvm_s390_cmma_log *args)
2049{
afdad616
CI		 2050 unsigned long bufsize;
2051 int srcu_idx, peek, ret;
2052 u8 *values;
4036e387 2053
afdad616 2054 if (!kvm->arch.use_cmma)
4036e387
CI		 2055 return -ENXIO;
2056 /* Invalid/unsupported flags were specified */
2057 if (args->flags & ~KVM_S390_CMMA_PEEK)
2058 return -EINVAL;
2059 /* Migration mode query, and we are not doing a migration */
2060 peek = !!(args->flags & KVM_S390_CMMA_PEEK);
afdad616 2061 if (!peek && !kvm->arch.migration_mode)
4036e387
CI		 2062 return -EINVAL;
2063 /* CMMA is disabled or was not used, or the buffer has length zero */
2064 bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX);
c9f0a2b8 2065 if (!bufsize || !kvm->mm->context.uses_cmm) {
4036e387
CI		 2066 memset(args, 0, sizeof(*args));
2067 return 0;
2068 }
afdad616
CI		 2069 /* We are not peeking, and there are no dirty pages */
2070 if (!peek && !atomic64_read(&kvm->arch.cmma_dirty_pages)) {
2071 memset(args, 0, sizeof(*args));
2072 return 0;
4036e387
CI		 2073 }
2074
afdad616
CI		 2075 values = vmalloc(bufsize);
2076 if (!values)
4036e387
CI		 2077 return -ENOMEM;
2078
4036e387
CI		 2079 down_read(&kvm->mm->mmap_sem);
2080 srcu_idx = srcu_read_lock(&kvm->srcu);
afdad616
CI		 2081 if (peek)
2082 ret = kvm_s390_peek_cmma(kvm, args, values, bufsize);
2083 else
2084 ret = kvm_s390_get_cmma(kvm, args, values, bufsize);
4036e387
CI		 2085 srcu_read_unlock(&kvm->srcu, srcu_idx);
2086 up_read(&kvm->mm->mmap_sem);
4036e387 2087
afdad616
CI		 2088 if (kvm->arch.migration_mode)
2089 args->remaining = atomic64_read(&kvm->arch.cmma_dirty_pages);
2090 else
2091 args->remaining = 0;
4036e387 2092
afdad616
CI		 2093 if (copy_to_user((void __user *)args->values, values, args->count))
2094 ret = -EFAULT;
2095
2096 vfree(values);
2097 return ret;
4036e387
CI		 2098}
2099
2100/*
2101 * This function sets the CMMA attributes for the given pages. If the input
2102 * buffer has zero length, no action is taken, otherwise the attributes are
c9f0a2b8 2103 * set and the mm->context.uses_cmm flag is set.
4036e387
CI		 2104 */
2105static int kvm_s390_set_cmma_bits(struct kvm *kvm,
2106 const struct kvm_s390_cmma_log *args)
2107{
2108 unsigned long hva, mask, pgstev, i;
2109 uint8_t *bits;
2110 int srcu_idx, r = 0;
2111
2112 mask = args->mask;
2113
2114 if (!kvm->arch.use_cmma)
2115 return -ENXIO;
2116 /* invalid/unsupported flags */
2117 if (args->flags != 0)
2118 return -EINVAL;
2119 /* Enforce sane limit on memory allocation */
2120 if (args->count > KVM_S390_CMMA_SIZE_MAX)
2121 return -EINVAL;
2122 /* Nothing to do */
2123 if (args->count == 0)
2124 return 0;
2125
42bc47b3 2126 bits = vmalloc(array_size(sizeof(*bits), args->count));
4036e387
CI		 2127 if (!bits)
2128 return -ENOMEM;
2129
2130 r = copy_from_user(bits, (void __user *)args->values, args->count);
2131 if (r) {
2132 r = -EFAULT;
2133 goto out;
2134 }
2135
2136 down_read(&kvm->mm->mmap_sem);
2137 srcu_idx = srcu_read_lock(&kvm->srcu);
2138 for (i = 0; i < args->count; i++) {
2139 hva = gfn_to_hva(kvm, args->start_gfn + i);
2140 if (kvm_is_error_hva(hva)) {
2141 r = -EFAULT;
2142 break;
2143 }
2144
2145 pgstev = bits[i];
2146 pgstev = pgstev << 24;
1bab1c02 2147 mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT;
4036e387
CI		 2148 set_pgste_bits(kvm->mm, hva, mask, pgstev);
2149 }
2150 srcu_read_unlock(&kvm->srcu, srcu_idx);
2151 up_read(&kvm->mm->mmap_sem);
2152
c9f0a2b8 2153 if (!kvm->mm->context.uses_cmm) {
4036e387 2154 down_write(&kvm->mm->mmap_sem);
c9f0a2b8 2155 kvm->mm->context.uses_cmm = 1;
4036e387
CI		 2156 up_write(&kvm->mm->mmap_sem);
2157 }
2158out:
2159 vfree(bits);
2160 return r;
2161}
2162
b0c632db
HC		 2163long kvm_arch_vm_ioctl(struct file *filp,
2164 unsigned int ioctl, unsigned long arg)
2165{
2166 struct kvm *kvm = filp->private_data;
2167 void __user *argp = (void __user *)arg;
f2061656 2168 struct kvm_device_attr attr;
b0c632db
HC		 2169 int r;
2170
2171 switch (ioctl) {
ba5c1e9b
CO		 2172 case KVM_S390_INTERRUPT: {
2173 struct kvm_s390_interrupt s390int;
2174
2175 r = -EFAULT;
2176 if (copy_from_user(&s390int, argp, sizeof(s390int)))
2177 break;
2178 r = kvm_s390_inject_vm(kvm, &s390int);
2179 break;
2180 }
84223598
CH		 2181 case KVM_CREATE_IRQCHIP: {
2182 struct kvm_irq_routing_entry routing;
2183
2184 r = -EINVAL;
2185 if (kvm->arch.use_irqchip) {
2186 /* Set up dummy routing. */
2187 memset(&routing, 0, sizeof(routing));
152b2839 2188 r = kvm_set_irq_routing(kvm, &routing, 0, 0);
84223598
CH		 2189 }
2190 break;
2191 }
f2061656
DD		 2192 case KVM_SET_DEVICE_ATTR: {
2193 r = -EFAULT;
2194 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2195 break;
2196 r = kvm_s390_vm_set_attr(kvm, &attr);
2197 break;
2198 }
2199 case KVM_GET_DEVICE_ATTR: {
2200 r = -EFAULT;
2201 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2202 break;
2203 r = kvm_s390_vm_get_attr(kvm, &attr);
2204 break;
2205 }
2206 case KVM_HAS_DEVICE_ATTR: {
2207 r = -EFAULT;
2208 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2209 break;
2210 r = kvm_s390_vm_has_attr(kvm, &attr);
2211 break;
2212 }
30ee2a98
JH		 2213 case KVM_S390_GET_SKEYS: {
2214 struct kvm_s390_skeys args;
2215
2216 r = -EFAULT;
2217 if (copy_from_user(&args, argp,
2218 sizeof(struct kvm_s390_skeys)))
2219 break;
2220 r = kvm_s390_get_skeys(kvm, &args);
2221 break;
2222 }
2223 case KVM_S390_SET_SKEYS: {
2224 struct kvm_s390_skeys args;
2225
2226 r = -EFAULT;
2227 if (copy_from_user(&args, argp,
2228 sizeof(struct kvm_s390_skeys)))
2229 break;
2230 r = kvm_s390_set_skeys(kvm, &args);
2231 break;
2232 }
4036e387
CI		 2233 case KVM_S390_GET_CMMA_BITS: {
2234 struct kvm_s390_cmma_log args;
2235
2236 r = -EFAULT;
2237 if (copy_from_user(&args, argp, sizeof(args)))
2238 break;
1de1ea7e 2239 mutex_lock(&kvm->slots_lock);
4036e387 2240 r = kvm_s390_get_cmma_bits(kvm, &args);
1de1ea7e 2241 mutex_unlock(&kvm->slots_lock);
4036e387
CI		 2242 if (!r) {
2243 r = copy_to_user(argp, &args, sizeof(args));
2244 if (r)
2245 r = -EFAULT;
2246 }
2247 break;
2248 }
2249 case KVM_S390_SET_CMMA_BITS: {
2250 struct kvm_s390_cmma_log args;
2251
2252 r = -EFAULT;
2253 if (copy_from_user(&args, argp, sizeof(args)))
2254 break;
1de1ea7e 2255 mutex_lock(&kvm->slots_lock);
4036e387 2256 r = kvm_s390_set_cmma_bits(kvm, &args);
1de1ea7e 2257 mutex_unlock(&kvm->slots_lock);
4036e387
CI		 2258 break;
2259 }
b0c632db 2260 default:
367e1319 2261 r = -ENOTTY;
b0c632db
HC		 2262 }
2263
2264 return r;
2265}
2266
45c9b47c
TK		 2267static int kvm_s390_apxa_installed(void)
2268{
e585b24a 2269 struct ap_config_info info;
45c9b47c 2270
e585b24a
TK		 2271 if (ap_instructions_available()) {
2272 if (ap_qci(&info) == 0)
2273 return info.apxa;
45c9b47c
TK		 2274 }
2275
2276 return 0;
2277}
2278
e585b24a
TK		 2279/*
2280 * The format of the crypto control block (CRYCB) is specified in the 3 low
2281 * order bits of the CRYCB designation (CRYCBD) field as follows:
2282 * Format 0: Neither the message security assist extension 3 (MSAX3) nor the
2283 * AP extended addressing (APXA) facility are installed.
2284 * Format 1: The APXA facility is not installed but the MSAX3 facility is.
2285 * Format 2: Both the APXA and MSAX3 facilities are installed
2286 */
45c9b47c
TK		 2287static void kvm_s390_set_crycb_format(struct kvm *kvm)
2288{
2289 kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
2290
e585b24a
TK		 2291 /* Clear the CRYCB format bits - i.e., set format 0 by default */
2292 kvm->arch.crypto.crycbd &= ~(CRYCB_FORMAT_MASK);
2293
2294 /* Check whether MSAX3 is installed */
2295 if (!test_kvm_facility(kvm, 76))
2296 return;
2297
45c9b47c
TK		 2298 if (kvm_s390_apxa_installed())
2299 kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
2300 else
2301 kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
2302}
2303
0e237e44
PM		 2304void kvm_arch_crypto_set_masks(struct kvm *kvm, unsigned long *apm,
2305 unsigned long *aqm, unsigned long *adm)
2306{
2307 struct kvm_s390_crypto_cb *crycb = kvm->arch.crypto.crycb;
2308
2309 mutex_lock(&kvm->lock);
2310 kvm_s390_vcpu_block_all(kvm);
2311
2312 switch (kvm->arch.crypto.crycbd & CRYCB_FORMAT_MASK) {
2313 case CRYCB_FORMAT2: /* APCB1 use 256 bits */
2314 memcpy(crycb->apcb1.apm, apm, 32);
2315 VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx %016lx %016lx %016lx",
2316 apm[0], apm[1], apm[2], apm[3]);
2317 memcpy(crycb->apcb1.aqm, aqm, 32);
2318 VM_EVENT(kvm, 3, "SET CRYCB: aqm %016lx %016lx %016lx %016lx",
2319 aqm[0], aqm[1], aqm[2], aqm[3]);
2320 memcpy(crycb->apcb1.adm, adm, 32);
2321 VM_EVENT(kvm, 3, "SET CRYCB: adm %016lx %016lx %016lx %016lx",
2322 adm[0], adm[1], adm[2], adm[3]);
2323 break;
2324 case CRYCB_FORMAT1:
2325 case CRYCB_FORMAT0: /* Fall through both use APCB0 */
2326 memcpy(crycb->apcb0.apm, apm, 8);
2327 memcpy(crycb->apcb0.aqm, aqm, 2);
2328 memcpy(crycb->apcb0.adm, adm, 2);
2329 VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx aqm %04x adm %04x",
2330 apm[0], *((unsigned short *)aqm),
2331 *((unsigned short *)adm));
2332 break;
2333 default: /* Can not happen */
2334 break;
2335 }
2336
2337 /* recreate the shadow crycb for each vcpu */
2338 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
2339 kvm_s390_vcpu_unblock_all(kvm);
2340 mutex_unlock(&kvm->lock);
2341}
2342EXPORT_SYMBOL_GPL(kvm_arch_crypto_set_masks);
2343
42104598
TK		 2344void kvm_arch_crypto_clear_masks(struct kvm *kvm)
2345{
2346 mutex_lock(&kvm->lock);
2347 kvm_s390_vcpu_block_all(kvm);
2348
2349 memset(&kvm->arch.crypto.crycb->apcb0, 0,
2350 sizeof(kvm->arch.crypto.crycb->apcb0));
2351 memset(&kvm->arch.crypto.crycb->apcb1, 0,
2352 sizeof(kvm->arch.crypto.crycb->apcb1));
2353
0e237e44 2354 VM_EVENT(kvm, 3, "%s", "CLR CRYCB:");
6cc571b1
PM		 2355 /* recreate the shadow crycb for each vcpu */
2356 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
42104598
TK		 2357 kvm_s390_vcpu_unblock_all(kvm);
2358 mutex_unlock(&kvm->lock);
2359}
2360EXPORT_SYMBOL_GPL(kvm_arch_crypto_clear_masks);
2361
9bb0ec09 2362static u64 kvm_s390_get_initial_cpuid(void)
9d8d5786 2363{
9bb0ec09
DH		 2364 struct cpuid cpuid;
2365
2366 get_cpu_id(&cpuid);
2367 cpuid.version = 0xff;
2368 return *((u64 *) &cpuid);
9d8d5786
MM		 2369}
2370
c54f0d6a 2371static void kvm_s390_crypto_init(struct kvm *kvm)
5102ee87 2372{
c54f0d6a 2373 kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
45c9b47c 2374 kvm_s390_set_crycb_format(kvm);
5102ee87 2375
e585b24a
TK		 2376 if (!test_kvm_facility(kvm, 76))
2377 return;
2378
ed6f76b4
TK		 2379 /* Enable AES/DEA protected key functions by default */
2380 kvm->arch.crypto.aes_kw = 1;
2381 kvm->arch.crypto.dea_kw = 1;
2382 get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
2383 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
2384 get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
2385 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
5102ee87
TK		 2386}
2387
7d43bafc
ED		 2388static void sca_dispose(struct kvm *kvm)
2389{
2390 if (kvm->arch.use_esca)
5e044315 2391 free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
7d43bafc
ED		 2392 else
2393 free_page((unsigned long)(kvm->arch.sca));
2394 kvm->arch.sca = NULL;
2395}
2396
e08b9637 2397int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
b0c632db 2398{
76a6dd72 2399 gfp_t alloc_flags = GFP_KERNEL;
9d8d5786 2400 int i, rc;
b0c632db 2401 char debug_name[16];
f6c137ff 2402 static unsigned long sca_offset;
b0c632db 2403
e08b9637
CO		 2404 rc = -EINVAL;
2405#ifdef CONFIG_KVM_S390_UCONTROL
2406 if (type & ~KVM_VM_S390_UCONTROL)
2407 goto out_err;
2408 if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
2409 goto out_err;
2410#else
2411 if (type)
2412 goto out_err;
2413#endif
2414
b0c632db
HC		 2415 rc = s390_enable_sie();
2416 if (rc)
d89f5eff 2417 goto out_err;
b0c632db 2418
b290411a
CO		 2419 rc = -ENOMEM;
2420
76a6dd72
DH		 2421 if (!sclp.has_64bscao)
2422 alloc_flags |= GFP_DMA;
5e044315 2423 rwlock_init(&kvm->arch.sca_lock);
9ac96d75 2424 /* start with basic SCA */
76a6dd72 2425 kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
b0c632db 2426 if (!kvm->arch.sca)
d89f5eff 2427 goto out_err;
0d9ce162 2428 mutex_lock(&kvm_lock);
c5c2c393 2429 sca_offset += 16;
bc784cce 2430 if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
c5c2c393 2431 sca_offset = 0;
bc784cce
ED		 2432 kvm->arch.sca = (struct bsca_block *)
2433 ((char *) kvm->arch.sca + sca_offset);
0d9ce162 2434 mutex_unlock(&kvm_lock);
b0c632db
HC		 2435
2436 sprintf(debug_name, "kvm-%u", current->pid);
2437
1cb9cf72 2438 kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
b0c632db 2439 if (!kvm->arch.dbf)
40f5b735 2440 goto out_err;
b0c632db 2441
19114beb 2442 BUILD_BUG_ON(sizeof(struct sie_page2) != 4096);
c54f0d6a
DH		 2443 kvm->arch.sie_page2 =
2444 (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2445 if (!kvm->arch.sie_page2)
40f5b735 2446 goto out_err;
9d8d5786 2447
25c84dba 2448 kvm->arch.sie_page2->kvm = kvm;
c54f0d6a 2449 kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
c3b9e3e1
CB		 2450
2451 for (i = 0; i < kvm_s390_fac_size(); i++) {
2452 kvm->arch.model.fac_mask[i] = S390_lowcore.stfle_fac_list[i] &
2453 (kvm_s390_fac_base[i] |
2454 kvm_s390_fac_ext[i]);
2455 kvm->arch.model.fac_list[i] = S390_lowcore.stfle_fac_list[i] &
2456 kvm_s390_fac_base[i];
2457 }
346fa2f8 2458 kvm->arch.model.subfuncs = kvm_s390_available_subfunc;
981467c9 2459
1935222d
DH		 2460 /* we are always in czam mode - even on pre z14 machines */
2461 set_kvm_facility(kvm->arch.model.fac_mask, 138);
2462 set_kvm_facility(kvm->arch.model.fac_list, 138);
2463 /* we emulate STHYI in kvm */
95ca2cb5
JF		 2464 set_kvm_facility(kvm->arch.model.fac_mask, 74);
2465 set_kvm_facility(kvm->arch.model.fac_list, 74);
1bab1c02
CI		 2466 if (MACHINE_HAS_TLB_GUEST) {
2467 set_kvm_facility(kvm->arch.model.fac_mask, 147);
2468 set_kvm_facility(kvm->arch.model.fac_list, 147);
2469 }
95ca2cb5 2470
05f31e3b
PM		 2471 if (css_general_characteristics.aiv && test_facility(65))
2472 set_kvm_facility(kvm->arch.model.fac_mask, 65);
2473
9bb0ec09 2474 kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
37c5f6c8 2475 kvm->arch.model.ibc = sclp.ibc & 0x0fff;
9d8d5786 2476
c54f0d6a 2477 kvm_s390_crypto_init(kvm);
5102ee87 2478
51978393 2479 mutex_init(&kvm->arch.float_int.ais_lock);
ba5c1e9b 2480 spin_lock_init(&kvm->arch.float_int.lock);
6d3da241
JF		 2481 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2482 INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
8a242234 2483 init_waitqueue_head(&kvm->arch.ipte_wq);
a6b7e459 2484 mutex_init(&kvm->arch.ipte_mutex);
ba5c1e9b 2485
b0c632db 2486 debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
78f26131 2487 VM_EVENT(kvm, 3, "vm created with type %lu", type);
b0c632db 2488
e08b9637
CO		 2489 if (type & KVM_VM_S390_UCONTROL) {
2490 kvm->arch.gmap = NULL;
a3a92c31 2491 kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
e08b9637 2492 } else {
32e6b236 2493 if (sclp.hamax == U64_MAX)
ee71d16d 2494 kvm->arch.mem_limit = TASK_SIZE_MAX;
32e6b236 2495 else
ee71d16d 2496 kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX,
32e6b236 2497 sclp.hamax + 1);
6ea427bb 2498 kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
e08b9637 2499 if (!kvm->arch.gmap)
40f5b735 2500 goto out_err;
2c70fe44 2501 kvm->arch.gmap->private = kvm;
24eb3a82 2502 kvm->arch.gmap->pfault_enabled = 0;
e08b9637 2503 }
fa6b7fe9 2504
c9f0a2b8 2505 kvm->arch.use_pfmfi = sclp.has_pfmfi;
55531b74 2506 kvm->arch.use_skf = sclp.has_skey;
8ad35755 2507 spin_lock_init(&kvm->arch.start_stop_lock);
a3508fbe 2508 kvm_s390_vsie_init(kvm);
d7c5cb01 2509 kvm_s390_gisa_init(kvm);
8335713a 2510 KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
8ad35755 2511
d89f5eff 2512 return 0;
40f5b735 2513out_err:
c54f0d6a 2514 free_page((unsigned long)kvm->arch.sie_page2);
598841ca 2515 debug_unregister(kvm->arch.dbf);
7d43bafc 2516 sca_dispose(kvm);
78f26131 2517 KVM_EVENT(3, "creation of vm failed: %d", rc);
d89f5eff 2518 return rc;
b0c632db
HC		 2519}
2520
d329c035
CB		 2521void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
2522{
2523 VCPU_EVENT(vcpu, 3, "%s", "free cpu");
ade38c31 2524 trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
67335e63 2525 kvm_s390_clear_local_irqs(vcpu);
3c038e6b 2526 kvm_clear_async_pf_completion_queue(vcpu);
bc784cce 2527 if (!kvm_is_ucontrol(vcpu->kvm))
a6e2f683 2528 sca_del_vcpu(vcpu);
27e0393f
CO		 2529
2530 if (kvm_is_ucontrol(vcpu->kvm))
6ea427bb 2531 gmap_remove(vcpu->arch.gmap);
27e0393f 2532
e6db1d61 2533 if (vcpu->kvm->arch.use_cmma)
b31605c1 2534 kvm_s390_vcpu_unsetup_cmma(vcpu);
d329c035 2535 free_page((unsigned long)(vcpu->arch.sie_block));
b31288fa 2536
6692cef3 2537 kvm_vcpu_uninit(vcpu);
b110feaf 2538 kmem_cache_free(kvm_vcpu_cache, vcpu);
d329c035
CB		 2539}
2540
2541static void kvm_free_vcpus(struct kvm *kvm)
2542{
2543 unsigned int i;
988a2cae 2544 struct kvm_vcpu *vcpu;
d329c035 2545
988a2cae
GN		 2546 kvm_for_each_vcpu(i, vcpu, kvm)
2547 kvm_arch_vcpu_destroy(vcpu);
2548
2549 mutex_lock(&kvm->lock);
2550 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
2551 kvm->vcpus[i] = NULL;
2552
2553 atomic_set(&kvm->online_vcpus, 0);
2554 mutex_unlock(&kvm->lock);
d329c035
CB		 2555}
2556
b0c632db
HC		 2557void kvm_arch_destroy_vm(struct kvm *kvm)
2558{
d329c035 2559 kvm_free_vcpus(kvm);
7d43bafc 2560 sca_dispose(kvm);
d329c035 2561 debug_unregister(kvm->arch.dbf);
d7c5cb01 2562 kvm_s390_gisa_destroy(kvm);
c54f0d6a 2563 free_page((unsigned long)kvm->arch.sie_page2);
27e0393f 2564 if (!kvm_is_ucontrol(kvm))
6ea427bb 2565 gmap_remove(kvm->arch.gmap);
841b91c5 2566 kvm_s390_destroy_adapters(kvm);
67335e63 2567 kvm_s390_clear_float_irqs(kvm);
a3508fbe 2568 kvm_s390_vsie_destroy(kvm);
8335713a 2569 KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
b0c632db
HC		 2570}
2571
2572/* Section: vcpu related */
dafd032a
DD		 2573static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
2574{
6ea427bb 2575 vcpu->arch.gmap = gmap_create(current->mm, -1UL);
dafd032a
DD		 2576 if (!vcpu->arch.gmap)
2577 return -ENOMEM;
2578 vcpu->arch.gmap->private = vcpu->kvm;
2579
2580 return 0;
2581}
2582
a6e2f683
ED		 2583static void sca_del_vcpu(struct kvm_vcpu *vcpu)
2584{
a6940674
DH		 2585 if (!kvm_s390_use_sca_entries())
2586 return;
5e044315 2587 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 2588 if (vcpu->kvm->arch.use_esca) {
2589 struct esca_block *sca = vcpu->kvm->arch.sca;
a6e2f683 2590
7d43bafc 2591 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
10ce32d5 2592 sca->cpu[vcpu->vcpu_id].sda = 0;
7d43bafc
ED		 2593 } else {
2594 struct bsca_block *sca = vcpu->kvm->arch.sca;
2595
2596 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
10ce32d5 2597 sca->cpu[vcpu->vcpu_id].sda = 0;
7d43bafc 2598 }
5e044315 2599 read_unlock(&vcpu->kvm->arch.sca_lock);
a6e2f683
ED		 2600}
2601
eaa78f34 2602static void sca_add_vcpu(struct kvm_vcpu *vcpu)
a6e2f683 2603{
a6940674
DH		 2604 if (!kvm_s390_use_sca_entries()) {
2605 struct bsca_block *sca = vcpu->kvm->arch.sca;
2606
2607 /* we still need the basic sca for the ipte control */
2608 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2609 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
f07afa04 2610 return;
a6940674 2611 }
eaa78f34
DH		 2612 read_lock(&vcpu->kvm->arch.sca_lock);
2613 if (vcpu->kvm->arch.use_esca) {
2614 struct esca_block *sca = vcpu->kvm->arch.sca;
7d43bafc 2615
eaa78f34 2616 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
7d43bafc
ED		 2617 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2618 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
0c9d8683 2619 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
eaa78f34 2620 set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
7d43bafc 2621 } else {
eaa78f34 2622 struct bsca_block *sca = vcpu->kvm->arch.sca;
a6e2f683 2623
eaa78f34 2624 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
7d43bafc
ED		 2625 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2626 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
eaa78f34 2627 set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
7d43bafc 2628 }
eaa78f34 2629 read_unlock(&vcpu->kvm->arch.sca_lock);
5e044315
ED		 2630}
2631
2632/* Basic SCA to Extended SCA data copy routines */
2633static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
2634{
2635 d->sda = s->sda;
2636 d->sigp_ctrl.c = s->sigp_ctrl.c;
2637 d->sigp_ctrl.scn = s->sigp_ctrl.scn;
2638}
2639
2640static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
2641{
2642 int i;
2643
2644 d->ipte_control = s->ipte_control;
2645 d->mcn[0] = s->mcn;
2646 for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
2647 sca_copy_entry(&d->cpu[i], &s->cpu[i]);
2648}
2649
2650static int sca_switch_to_extended(struct kvm *kvm)
2651{
2652 struct bsca_block *old_sca = kvm->arch.sca;
2653 struct esca_block *new_sca;
2654 struct kvm_vcpu *vcpu;
2655 unsigned int vcpu_idx;
2656 u32 scaol, scaoh;
2657
2658 new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
2659 if (!new_sca)
2660 return -ENOMEM;
2661
2662 scaoh = (u32)((u64)(new_sca) >> 32);
2663 scaol = (u32)(u64)(new_sca) & ~0x3fU;
2664
2665 kvm_s390_vcpu_block_all(kvm);
2666 write_lock(&kvm->arch.sca_lock);
2667
2668 sca_copy_b_to_e(new_sca, old_sca);
2669
2670 kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
2671 vcpu->arch.sie_block->scaoh = scaoh;
2672 vcpu->arch.sie_block->scaol = scaol;
0c9d8683 2673 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
5e044315
ED		 2674 }
2675 kvm->arch.sca = new_sca;
2676 kvm->arch.use_esca = 1;
2677
2678 write_unlock(&kvm->arch.sca_lock);
2679 kvm_s390_vcpu_unblock_all(kvm);
2680
2681 free_page((unsigned long)old_sca);
2682
8335713a
CB		 2683 VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
2684 old_sca, kvm->arch.sca);
5e044315 2685 return 0;
a6e2f683
ED		 2686}
2687
2688static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
2689{
5e044315
ED		 2690 int rc;
2691
a6940674
DH		 2692 if (!kvm_s390_use_sca_entries()) {
2693 if (id < KVM_MAX_VCPUS)
2694 return true;
2695 return false;
2696 }
5e044315
ED		 2697 if (id < KVM_S390_BSCA_CPU_SLOTS)
2698 return true;
76a6dd72 2699 if (!sclp.has_esca || !sclp.has_64bscao)
5e044315
ED		 2700 return false;
2701
2702 mutex_lock(&kvm->lock);
2703 rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
2704 mutex_unlock(&kvm->lock);
2705
2706 return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
a6e2f683
ED		 2707}
2708
b0c632db
HC		 2709int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
2710{
3c038e6b
DD		 2711 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
2712 kvm_clear_async_pf_completion_queue(vcpu);
59674c1a
CB		 2713 vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
2714 KVM_SYNC_GPRS |
9eed0735 2715 KVM_SYNC_ACRS |
b028ee3e
DH		 2716 KVM_SYNC_CRS |
2717 KVM_SYNC_ARCH0 |
2718 KVM_SYNC_PFAULT;
75a4615c 2719 kvm_s390_set_prefix(vcpu, 0);
c6e5f166
FZ		 2720 if (test_kvm_facility(vcpu->kvm, 64))
2721 vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
35b3fde6
CB		 2722 if (test_kvm_facility(vcpu->kvm, 82))
2723 vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC;
4e0b1ab7
FZ		 2724 if (test_kvm_facility(vcpu->kvm, 133))
2725 vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
a3da7b4a
CB		 2726 if (test_kvm_facility(vcpu->kvm, 156))
2727 vcpu->run->kvm_valid_regs |= KVM_SYNC_ETOKEN;
f6aa6dc4
DH		 2728 /* fprs can be synchronized via vrs, even if the guest has no vx. With
2729 * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
2730 */
2731 if (MACHINE_HAS_VX)
68c55750 2732 vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
6fd8e67d
DH		 2733 else
2734 vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
dafd032a
DD		 2735
2736 if (kvm_is_ucontrol(vcpu->kvm))
2737 return __kvm_ucontrol_vcpu_init(vcpu);
2738
b0c632db
HC		 2739 return 0;
2740}
2741
db0758b2
DH		 2742/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2743static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2744{
2745 WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
9c23a131 2746 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2 2747 vcpu->arch.cputm_start = get_tod_clock_fast();
9c23a131 2748 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 2749}
2750
2751/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2752static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2753{
2754 WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
9c23a131 2755 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 2756 vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
2757 vcpu->arch.cputm_start = 0;
9c23a131 2758 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 2759}
2760
2761/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2762static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2763{
2764 WARN_ON_ONCE(vcpu->arch.cputm_enabled);
2765 vcpu->arch.cputm_enabled = true;
2766 __start_cpu_timer_accounting(vcpu);
2767}
2768
2769/* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2770static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2771{
2772 WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
2773 __stop_cpu_timer_accounting(vcpu);
2774 vcpu->arch.cputm_enabled = false;
2775}
2776
2777static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2778{
2779 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2780 __enable_cpu_timer_accounting(vcpu);
2781 preempt_enable();
2782}
2783
2784static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2785{
2786 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2787 __disable_cpu_timer_accounting(vcpu);
2788 preempt_enable();
2789}
2790
4287f247
DH		 2791/* set the cpu timer - may only be called from the VCPU thread itself */
2792void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
2793{
db0758b2 2794 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
9c23a131 2795 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
db0758b2
DH		 2796 if (vcpu->arch.cputm_enabled)
2797 vcpu->arch.cputm_start = get_tod_clock_fast();
4287f247 2798 vcpu->arch.sie_block->cputm = cputm;
9c23a131 2799 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
db0758b2 2800 preempt_enable();
4287f247
DH		 2801}
2802
db0758b2 2803/* update and get the cpu timer - can also be called from other VCPU threads */
4287f247
DH		 2804__u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
2805{
9c23a131 2806 unsigned int seq;
db0758b2 2807 __u64 value;
db0758b2
DH		 2808
2809 if (unlikely(!vcpu->arch.cputm_enabled))
2810 return vcpu->arch.sie_block->cputm;
2811
9c23a131
DH		 2812 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2813 do {
2814 seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
2815 /*
2816 * If the writer would ever execute a read in the critical
2817 * section, e.g. in irq context, we have a deadlock.
2818 */
2819 WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu);
2820 value = vcpu->arch.sie_block->cputm;
2821 /* if cputm_start is 0, accounting is being started/stopped */
2822 if (likely(vcpu->arch.cputm_start))
2823 value -= get_tod_clock_fast() - vcpu->arch.cputm_start;
2824 } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1));
2825 preempt_enable();
db0758b2 2826 return value;
4287f247
DH		 2827}
2828
b0c632db
HC		 2829void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2830{
9977e886 2831
37d9df98 2832 gmap_enable(vcpu->arch.enabled_gmap);
ef8f4f49 2833 kvm_s390_set_cpuflags(vcpu, CPUSTAT_RUNNING);
5ebda316 2834 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
db0758b2 2835 __start_cpu_timer_accounting(vcpu);
01a745ac 2836 vcpu->cpu = cpu;
b0c632db
HC		 2837}
2838
2839void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
2840{
01a745ac 2841 vcpu->cpu = -1;
5ebda316 2842 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
db0758b2 2843 __stop_cpu_timer_accounting(vcpu);
9daecfc6 2844 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING);
37d9df98
DH		 2845 vcpu->arch.enabled_gmap = gmap_get_enabled();
2846 gmap_disable(vcpu->arch.enabled_gmap);
9977e886 2847
b0c632db
HC		 2848}
2849
2850static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
2851{
2852 /* this equals initial cpu reset in pop, but we don't switch to ESA */
2853 vcpu->arch.sie_block->gpsw.mask = 0UL;
2854 vcpu->arch.sie_block->gpsw.addr = 0UL;
8d26cf7b 2855 kvm_s390_set_prefix(vcpu, 0);
4287f247 2856 kvm_s390_set_cpu_timer(vcpu, 0);
b0c632db
HC		 2857 vcpu->arch.sie_block->ckc = 0UL;
2858 vcpu->arch.sie_block->todpr = 0;
2859 memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
b9224cd7
DH		 2860 vcpu->arch.sie_block->gcr[0] = CR0_UNUSED_56 |
2861 CR0_INTERRUPT_KEY_SUBMASK |
2862 CR0_MEASUREMENT_ALERT_SUBMASK;
2863 vcpu->arch.sie_block->gcr[14] = CR14_UNUSED_32 |
2864 CR14_UNUSED_33 |
2865 CR14_EXTERNAL_DAMAGE_SUBMASK;
9abc2a08
DH		 2866 /* make sure the new fpc will be lazily loaded */
2867 save_fpu_regs();
2868 current->thread.fpu.fpc = 0;
b0c632db 2869 vcpu->arch.sie_block->gbea = 1;
672550fb 2870 vcpu->arch.sie_block->pp = 0;
35b3fde6 2871 vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
3c038e6b
DD		 2872 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
2873 kvm_clear_async_pf_completion_queue(vcpu);
6352e4d2
DH		 2874 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
2875 kvm_s390_vcpu_stop(vcpu);
2ed10cc1 2876 kvm_s390_clear_local_irqs(vcpu);
b0c632db
HC		 2877}
2878
31928aa5 2879void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
42897d86 2880{
72f25020 2881 mutex_lock(&vcpu->kvm->lock);
fdf03650 2882 preempt_disable();
72f25020 2883 vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
d16b52cb 2884 vcpu->arch.sie_block->epdx = vcpu->kvm->arch.epdx;
fdf03650 2885 preempt_enable();
72f25020 2886 mutex_unlock(&vcpu->kvm->lock);
25508824 2887 if (!kvm_is_ucontrol(vcpu->kvm)) {
dafd032a 2888 vcpu->arch.gmap = vcpu->kvm->arch.gmap;
eaa78f34 2889 sca_add_vcpu(vcpu);
25508824 2890 }
6502a34c
DH		 2891 if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
2892 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
37d9df98
DH		 2893 /* make vcpu_load load the right gmap on the first trigger */
2894 vcpu->arch.enabled_gmap = vcpu->arch.gmap;
42897d86
MT		 2895}
2896
8ec2fa52
CB		 2897static bool kvm_has_pckmo_subfunc(struct kvm *kvm, unsigned long nr)
2898{
2899 if (test_bit_inv(nr, (unsigned long *)&kvm->arch.model.subfuncs.pckmo) &&
2900 test_bit_inv(nr, (unsigned long *)&kvm_s390_available_subfunc.pckmo))
2901 return true;
2902 return false;
2903}
2904
2905static bool kvm_has_pckmo_ecc(struct kvm *kvm)
2906{
2907 /* At least one ECC subfunction must be present */
2908 return kvm_has_pckmo_subfunc(kvm, 32) ||
2909 kvm_has_pckmo_subfunc(kvm, 33) ||
2910 kvm_has_pckmo_subfunc(kvm, 34) ||
2911 kvm_has_pckmo_subfunc(kvm, 40) ||
2912 kvm_has_pckmo_subfunc(kvm, 41);
2913
2914}
2915
5102ee87
TK		 2916static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
2917{
e585b24a
TK		 2918 /*
2919 * If the AP instructions are not being interpreted and the MSAX3
2920 * facility is not configured for the guest, there is nothing to set up.
2921 */
2922 if (!vcpu->kvm->arch.crypto.apie && !test_kvm_facility(vcpu->kvm, 76))
5102ee87
TK		 2923 return;
2924
e585b24a 2925 vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
a374e892 2926 vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);
37940fb0 2927 vcpu->arch.sie_block->eca &= ~ECA_APIE;
8ec2fa52 2928 vcpu->arch.sie_block->ecd &= ~ECD_ECC;
a374e892 2929
e585b24a
TK		 2930 if (vcpu->kvm->arch.crypto.apie)
2931 vcpu->arch.sie_block->eca |= ECA_APIE;
a374e892 2932
e585b24a 2933 /* Set up protected key support */
8ec2fa52 2934 if (vcpu->kvm->arch.crypto.aes_kw) {
a374e892 2935 vcpu->arch.sie_block->ecb3 |= ECB3_AES;
8ec2fa52
CB		 2936 /* ecc is also wrapped with AES key */
2937 if (kvm_has_pckmo_ecc(vcpu->kvm))
2938 vcpu->arch.sie_block->ecd |= ECD_ECC;
2939 }
2940
a374e892
TK		 2941 if (vcpu->kvm->arch.crypto.dea_kw)
2942 vcpu->arch.sie_block->ecb3 |= ECB3_DEA;
5102ee87
TK		 2943}
2944
b31605c1
DD		 2945void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
2946{
2947 free_page(vcpu->arch.sie_block->cbrlo);
2948 vcpu->arch.sie_block->cbrlo = 0;
2949}
2950
2951int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
2952{
2953 vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
2954 if (!vcpu->arch.sie_block->cbrlo)
2955 return -ENOMEM;
b31605c1
DD		 2956 return 0;
2957}
2958
91520f1a
MM		 2959static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
2960{
2961 struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
2962
91520f1a 2963 vcpu->arch.sie_block->ibc = model->ibc;
80bc79dc 2964 if (test_kvm_facility(vcpu->kvm, 7))
c54f0d6a 2965 vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
91520f1a
MM		 2966}
2967
b0c632db
HC		 2968int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
2969{
b31605c1 2970 int rc = 0;
b31288fa 2971
9e6dabef
CH		 2972 atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
2973 CPUSTAT_SM |
a4a4f191
GH		 2974 CPUSTAT_STOPPED);
2975
53df84f8 2976 if (test_kvm_facility(vcpu->kvm, 78))
ef8f4f49 2977 kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED2);
53df84f8 2978 else if (test_kvm_facility(vcpu->kvm, 8))
ef8f4f49 2979 kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED);
a4a4f191 2980
91520f1a
MM		 2981 kvm_s390_vcpu_setup_model(vcpu);
2982
bdab09f3
DH		 2983 /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
2984 if (MACHINE_HAS_ESOP)
0c9d8683 2985 vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT;
bd50e8ec 2986 if (test_kvm_facility(vcpu->kvm, 9))
0c9d8683 2987 vcpu->arch.sie_block->ecb |= ECB_SRSI;
f597d24e 2988 if (test_kvm_facility(vcpu->kvm, 73))
0c9d8683 2989 vcpu->arch.sie_block->ecb |= ECB_TE;
7feb6bb8 2990
c9f0a2b8 2991 if (test_kvm_facility(vcpu->kvm, 8) && vcpu->kvm->arch.use_pfmfi)
0c9d8683 2992 vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI;
cd1836f5 2993 if (test_kvm_facility(vcpu->kvm, 130))
0c9d8683
DH		 2994 vcpu->arch.sie_block->ecb2 |= ECB2_IEP;
2995 vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI;
48ee7d3a 2996 if (sclp.has_cei)
0c9d8683 2997 vcpu->arch.sie_block->eca |= ECA_CEI;
11ad65b7 2998 if (sclp.has_ib)
0c9d8683 2999 vcpu->arch.sie_block->eca |= ECA_IB;
37c5f6c8 3000 if (sclp.has_siif)
0c9d8683 3001 vcpu->arch.sie_block->eca |= ECA_SII;
37c5f6c8 3002 if (sclp.has_sigpif)
0c9d8683 3003 vcpu->arch.sie_block->eca |= ECA_SIGPI;
18280d8b 3004 if (test_kvm_facility(vcpu->kvm, 129)) {
0c9d8683
DH		 3005 vcpu->arch.sie_block->eca |= ECA_VX;
3006 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
13211ea7 3007 }
8fa1696e
CW		 3008 if (test_kvm_facility(vcpu->kvm, 139))
3009 vcpu->arch.sie_block->ecd |= ECD_MEF;
a3da7b4a
CB		 3010 if (test_kvm_facility(vcpu->kvm, 156))
3011 vcpu->arch.sie_block->ecd |= ECD_ETOKENF;
d7c5cb01
MM		 3012 if (vcpu->arch.sie_block->gd) {
3013 vcpu->arch.sie_block->eca |= ECA_AIV;
3014 VCPU_EVENT(vcpu, 3, "AIV gisa format-%u enabled for cpu %03u",
3015 vcpu->arch.sie_block->gd & 0x3, vcpu->vcpu_id);
3016 }
4e0b1ab7
FZ		 3017 vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
3018 | SDNXC;
c6e5f166 3019 vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
730cd632
FA		 3020
3021 if (sclp.has_kss)
ef8f4f49 3022 kvm_s390_set_cpuflags(vcpu, CPUSTAT_KSS);
730cd632
FA		 3023 else
3024 vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
5a5e6536 3025
e6db1d61 3026 if (vcpu->kvm->arch.use_cmma) {
b31605c1
DD		 3027 rc = kvm_s390_vcpu_setup_cmma(vcpu);
3028 if (rc)
3029 return rc;
b31288fa 3030 }
0ac96caf 3031 hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ca872302 3032 vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
9d8d5786 3033
67d49d52
CW		 3034 vcpu->arch.sie_block->hpid = HPID_KVM;
3035
5102ee87
TK		 3036 kvm_s390_vcpu_crypto_setup(vcpu);
3037
b31605c1 3038 return rc;
b0c632db
HC		 3039}
3040
3041struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
3042 unsigned int id)
3043{
4d47555a 3044 struct kvm_vcpu *vcpu;
7feb6bb8 3045 struct sie_page *sie_page;
4d47555a
CO		 3046 int rc = -EINVAL;
3047
4215825e 3048 if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
4d47555a
CO		 3049 goto out;
3050
3051 rc = -ENOMEM;
b0c632db 3052
b110feaf 3053 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
b0c632db 3054 if (!vcpu)
4d47555a 3055 goto out;
b0c632db 3056
da72ca4d 3057 BUILD_BUG_ON(sizeof(struct sie_page) != 4096);
7feb6bb8
MM		 3058 sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
3059 if (!sie_page)
b0c632db
HC		 3060 goto out_free_cpu;
3061
7feb6bb8
MM		 3062 vcpu->arch.sie_block = &sie_page->sie_block;
3063 vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
3064
efed1104
DH		 3065 /* the real guest size will always be smaller than msl */
3066 vcpu->arch.sie_block->mso = 0;
3067 vcpu->arch.sie_block->msl = sclp.hamax;
3068
b0c632db 3069 vcpu->arch.sie_block->icpua = id;
ba5c1e9b 3070 spin_lock_init(&vcpu->arch.local_int.lock);
982cff42 3071 vcpu->arch.sie_block->gd = (u32)(u64)kvm->arch.gisa_int.origin;
4b9f9525
MM		 3072 if (vcpu->arch.sie_block->gd && sclp.has_gisaf)
3073 vcpu->arch.sie_block->gd |= GISA_FORMAT1;
9c23a131 3074 seqcount_init(&vcpu->arch.cputm_seqcount);
ba5c1e9b 3075
b0c632db
HC		 3076 rc = kvm_vcpu_init(vcpu, kvm, id);
3077 if (rc)
9abc2a08 3078 goto out_free_sie_block;
8335713a 3079 VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu,
b0c632db 3080 vcpu->arch.sie_block);
ade38c31 3081 trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block);
b0c632db 3082
b0c632db 3083 return vcpu;
7b06bf2f
WY		 3084out_free_sie_block:
3085 free_page((unsigned long)(vcpu->arch.sie_block));
b0c632db 3086out_free_cpu:
b110feaf 3087 kmem_cache_free(kvm_vcpu_cache, vcpu);
4d47555a 3088out:
b0c632db
HC		 3089 return ERR_PTR(rc);
3090}
3091
b0c632db
HC		 3092int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
3093{
9a022067 3094 return kvm_s390_vcpu_has_irq(vcpu, 0);
b0c632db
HC		 3095}
3096
199b5763
LM		 3097bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
3098{
0546c63d 3099 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
199b5763
LM		 3100}
3101
27406cd5 3102void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
49b99e1e 3103{
805de8f4 3104 atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
61a6df54 3105 exit_sie(vcpu);
49b99e1e
CB		 3106}
3107
27406cd5 3108void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
49b99e1e 3109{
805de8f4 3110 atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
49b99e1e
CB		 3111}
3112
8e236546
CB		 3113static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
3114{
805de8f4 3115 atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
61a6df54 3116 exit_sie(vcpu);
8e236546
CB		 3117}
3118
9ea59728
DH		 3119bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu)
3120{
3121 return atomic_read(&vcpu->arch.sie_block->prog20) &
3122 (PROG_BLOCK_SIE | PROG_REQUEST);
3123}
3124
8e236546
CB		 3125static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
3126{
9bf9fde2 3127 atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
8e236546
CB		 3128}
3129
49b99e1e 3130/*
9ea59728 3131 * Kick a guest cpu out of (v)SIE and wait until (v)SIE is not running.
49b99e1e
CB		 3132 * If the CPU is not running (e.g. waiting as idle) the function will
3133 * return immediately. */
3134void exit_sie(struct kvm_vcpu *vcpu)
3135{
ef8f4f49 3136 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
9ea59728 3137 kvm_s390_vsie_kick(vcpu);
49b99e1e
CB		 3138 while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
3139 cpu_relax();
3140}
3141
8e236546
CB		 3142/* Kick a guest cpu out of SIE to process a request synchronously */
3143void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
49b99e1e 3144{
8e236546
CB		 3145 kvm_make_request(req, vcpu);
3146 kvm_s390_vcpu_request(vcpu);
49b99e1e
CB		 3147}
3148
414d3b07
MS		 3149static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
3150 unsigned long end)
2c70fe44 3151{
2c70fe44
CB		 3152 struct kvm *kvm = gmap->private;
3153 struct kvm_vcpu *vcpu;
414d3b07
MS		 3154 unsigned long prefix;
3155 int i;
2c70fe44 3156
65d0b0d4
DH		 3157 if (gmap_is_shadow(gmap))
3158 return;
414d3b07
MS		 3159 if (start >= 1UL << 31)
3160 /* We are only interested in prefix pages */
3161 return;
2c70fe44
CB		 3162 kvm_for_each_vcpu(i, vcpu, kvm) {
3163 /* match against both prefix pages */
414d3b07
MS		 3164 prefix = kvm_s390_get_prefix(vcpu);
3165 if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
3166 VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
3167 start, end);
8e236546 3168 kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
2c70fe44
CB		 3169 }
3170 }
3171}
3172
8b905d28
CB		 3173bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
3174{
3175 /* do not poll with more than halt_poll_max_steal percent of steal time */
3176 if (S390_lowcore.avg_steal_timer * 100 / (TICK_USEC << 12) >=
3177 halt_poll_max_steal) {
3178 vcpu->stat.halt_no_poll_steal++;
3179 return true;
3180 }
3181 return false;
3182}
3183
b6d33834
CD		 3184int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
3185{
3186 /* kvm common code refers to this, but never calls it */
3187 BUG();
3188 return 0;
3189}
3190
14eebd91
CO		 3191static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
3192 struct kvm_one_reg *reg)
3193{
3194 int r = -EINVAL;
3195
3196 switch (reg->id) {
29b7c71b
CO		 3197 case KVM_REG_S390_TODPR:
3198 r = put_user(vcpu->arch.sie_block->todpr,
3199 (u32 __user *)reg->addr);
3200 break;
3201 case KVM_REG_S390_EPOCHDIFF:
3202 r = put_user(vcpu->arch.sie_block->epoch,
3203 (u64 __user *)reg->addr);
3204 break;
46a6dd1c 3205 case KVM_REG_S390_CPU_TIMER:
4287f247 3206 r = put_user(kvm_s390_get_cpu_timer(vcpu),
46a6dd1c
J		 3207 (u64 __user *)reg->addr);
3208 break;
3209 case KVM_REG_S390_CLOCK_COMP:
3210 r = put_user(vcpu->arch.sie_block->ckc,
3211 (u64 __user *)reg->addr);
3212 break;
536336c2
DD		 3213 case KVM_REG_S390_PFTOKEN:
3214 r = put_user(vcpu->arch.pfault_token,
3215 (u64 __user *)reg->addr);
3216 break;
3217 case KVM_REG_S390_PFCOMPARE:
3218 r = put_user(vcpu->arch.pfault_compare,
3219 (u64 __user *)reg->addr);
3220 break;
3221 case KVM_REG_S390_PFSELECT:
3222 r = put_user(vcpu->arch.pfault_select,
3223 (u64 __user *)reg->addr);
3224 break;
672550fb
CB		 3225 case KVM_REG_S390_PP:
3226 r = put_user(vcpu->arch.sie_block->pp,
3227 (u64 __user *)reg->addr);
3228 break;
afa45ff5
CB		 3229 case KVM_REG_S390_GBEA:
3230 r = put_user(vcpu->arch.sie_block->gbea,
3231 (u64 __user *)reg->addr);
3232 break;
14eebd91
CO		 3233 default:
3234 break;
3235 }
3236
3237 return r;
3238}
3239
3240static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
3241 struct kvm_one_reg *reg)
3242{
3243 int r = -EINVAL;
4287f247 3244 __u64 val;
14eebd91
CO		 3245
3246 switch (reg->id) {
29b7c71b
CO		 3247 case KVM_REG_S390_TODPR:
3248 r = get_user(vcpu->arch.sie_block->todpr,
3249 (u32 __user *)reg->addr);
3250 break;
3251 case KVM_REG_S390_EPOCHDIFF:
3252 r = get_user(vcpu->arch.sie_block->epoch,
3253 (u64 __user *)reg->addr);
3254 break;
46a6dd1c 3255 case KVM_REG_S390_CPU_TIMER:
4287f247
DH		 3256 r = get_user(val, (u64 __user *)reg->addr);
3257 if (!r)
3258 kvm_s390_set_cpu_timer(vcpu, val);
46a6dd1c
J		 3259 break;
3260 case KVM_REG_S390_CLOCK_COMP:
3261 r = get_user(vcpu->arch.sie_block->ckc,
3262 (u64 __user *)reg->addr);
3263 break;
536336c2
DD		 3264 case KVM_REG_S390_PFTOKEN:
3265 r = get_user(vcpu->arch.pfault_token,
3266 (u64 __user *)reg->addr);
9fbd8082
DH		 3267 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3268 kvm_clear_async_pf_completion_queue(vcpu);
536336c2
DD		 3269 break;
3270 case KVM_REG_S390_PFCOMPARE:
3271 r = get_user(vcpu->arch.pfault_compare,
3272 (u64 __user *)reg->addr);
3273 break;
3274 case KVM_REG_S390_PFSELECT:
3275 r = get_user(vcpu->arch.pfault_select,
3276 (u64 __user *)reg->addr);
3277 break;
672550fb
CB		 3278 case KVM_REG_S390_PP:
3279 r = get_user(vcpu->arch.sie_block->pp,
3280 (u64 __user *)reg->addr);
3281 break;
afa45ff5
CB		 3282 case KVM_REG_S390_GBEA:
3283 r = get_user(vcpu->arch.sie_block->gbea,
3284 (u64 __user *)reg->addr);
3285 break;
14eebd91
CO		 3286 default:
3287 break;
3288 }
3289
3290 return r;
3291}
b6d33834 3292
b0c632db
HC		 3293static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
3294{
b0c632db 3295 kvm_s390_vcpu_initial_reset(vcpu);
b0c632db
HC		 3296 return 0;
3297}
3298
3299int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3300{
875656fe 3301 vcpu_load(vcpu);
5a32c1af 3302 memcpy(&vcpu->run->s.regs.gprs, &regs->gprs, sizeof(regs->gprs));
875656fe 3303 vcpu_put(vcpu);
b0c632db
HC		 3304 return 0;
3305}
3306
3307int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3308{
1fc9b76b 3309 vcpu_load(vcpu);
5a32c1af 3310 memcpy(&regs->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
1fc9b76b 3311 vcpu_put(vcpu);
b0c632db
HC		 3312 return 0;
3313}
3314
3315int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
3316 struct kvm_sregs *sregs)
3317{
b4ef9d4e
CD		 3318 vcpu_load(vcpu);
3319
59674c1a 3320 memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
b0c632db 3321 memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
b4ef9d4e
CD		 3322
3323 vcpu_put(vcpu);
b0c632db
HC		 3324 return 0;
3325}
3326
3327int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
3328 struct kvm_sregs *sregs)
3329{
bcdec41c
CD		 3330 vcpu_load(vcpu);
3331
59674c1a 3332 memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
b0c632db 3333 memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
bcdec41c
CD		 3334
3335 vcpu_put(vcpu);
b0c632db
HC		 3336 return 0;
3337}
3338
3339int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3340{
6a96bc7f
CD		 3341 int ret = 0;
3342
3343 vcpu_load(vcpu);
3344
3345 if (test_fp_ctl(fpu->fpc)) {
3346 ret = -EINVAL;
3347 goto out;
3348 }
e1788bb9 3349 vcpu->run->s.regs.fpc = fpu->fpc;
9abc2a08 3350 if (MACHINE_HAS_VX)
a7d4b8f2
DH		 3351 convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
3352 (freg_t *) fpu->fprs);
9abc2a08 3353 else
a7d4b8f2 3354 memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
6a96bc7f
CD		 3355
3356out:
3357 vcpu_put(vcpu);
3358 return ret;
b0c632db
HC		 3359}
3360
3361int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3362{
1393123e
CD		 3363 vcpu_load(vcpu);
3364
9abc2a08
DH		 3365 /* make sure we have the latest values */
3366 save_fpu_regs();
3367 if (MACHINE_HAS_VX)
a7d4b8f2
DH		 3368 convert_vx_to_fp((freg_t *) fpu->fprs,
3369 (__vector128 *) vcpu->run->s.regs.vrs);
9abc2a08 3370 else
a7d4b8f2 3371 memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
e1788bb9 3372 fpu->fpc = vcpu->run->s.regs.fpc;
1393123e
CD		 3373
3374 vcpu_put(vcpu);
b0c632db
HC		 3375 return 0;
3376}
3377
3378static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
3379{
3380 int rc = 0;
3381
7a42fdc2 3382 if (!is_vcpu_stopped(vcpu))
b0c632db 3383 rc = -EBUSY;
d7b0b5eb
CO		 3384 else {
3385 vcpu->run->psw_mask = psw.mask;
3386 vcpu->run->psw_addr = psw.addr;
3387 }
b0c632db
HC		 3388 return rc;
3389}
3390
3391int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
3392 struct kvm_translation *tr)
3393{
3394 return -EINVAL; /* not implemented yet */
3395}
3396
27291e21
DH		 3397#define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
3398 KVM_GUESTDBG_USE_HW_BP | \
3399 KVM_GUESTDBG_ENABLE)
3400
d0bfb940
JK		 3401int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
3402 struct kvm_guest_debug *dbg)
b0c632db 3403{
27291e21
DH		 3404 int rc = 0;
3405
66b56562
CD		 3406 vcpu_load(vcpu);
3407
27291e21
DH		 3408 vcpu->guest_debug = 0;
3409 kvm_s390_clear_bp_data(vcpu);
3410
66b56562
CD		 3411 if (dbg->control & ~VALID_GUESTDBG_FLAGS) {
3412 rc = -EINVAL;
3413 goto out;
3414 }
3415 if (!sclp.has_gpere) {
3416 rc = -EINVAL;
3417 goto out;
3418 }
27291e21
DH		 3419
3420 if (dbg->control & KVM_GUESTDBG_ENABLE) {
3421 vcpu->guest_debug = dbg->control;
3422 /* enforce guest PER */
ef8f4f49 3423 kvm_s390_set_cpuflags(vcpu, CPUSTAT_P);
27291e21
DH		 3424
3425 if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
3426 rc = kvm_s390_import_bp_data(vcpu, dbg);
3427 } else {
9daecfc6 3428 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
27291e21
DH		 3429 vcpu->arch.guestdbg.last_bp = 0;
3430 }
3431
3432 if (rc) {
3433 vcpu->guest_debug = 0;
3434 kvm_s390_clear_bp_data(vcpu);
9daecfc6 3435 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
27291e21
DH		 3436 }
3437
66b56562
CD		 3438out:
3439 vcpu_put(vcpu);
27291e21 3440 return rc;
b0c632db
HC		 3441}
3442
62d9f0db
MT		 3443int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
3444 struct kvm_mp_state *mp_state)
3445{
fd232561
CD		 3446 int ret;
3447
3448 vcpu_load(vcpu);
3449
6352e4d2 3450 /* CHECK_STOP and LOAD are not supported yet */
fd232561
CD		 3451 ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
3452 KVM_MP_STATE_OPERATING;
3453
3454 vcpu_put(vcpu);
3455 return ret;
62d9f0db
MT		 3456}
3457
3458int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
3459 struct kvm_mp_state *mp_state)
3460{
6352e4d2
DH		 3461 int rc = 0;
3462
e83dff5e
CD		 3463 vcpu_load(vcpu);
3464
6352e4d2
DH		 3465 /* user space knows about this interface - let it control the state */
3466 vcpu->kvm->arch.user_cpu_state_ctrl = 1;
3467
3468 switch (mp_state->mp_state) {
3469 case KVM_MP_STATE_STOPPED:
3470 kvm_s390_vcpu_stop(vcpu);
3471 break;
3472 case KVM_MP_STATE_OPERATING:
3473 kvm_s390_vcpu_start(vcpu);
3474 break;
3475 case KVM_MP_STATE_LOAD:
3476 case KVM_MP_STATE_CHECK_STOP:
3477 /* fall through - CHECK_STOP and LOAD are not supported yet */
3478 default:
3479 rc = -ENXIO;
3480 }
3481
e83dff5e 3482 vcpu_put(vcpu);
6352e4d2 3483 return rc;
62d9f0db
MT		 3484}
3485
8ad35755
DH		 3486static bool ibs_enabled(struct kvm_vcpu *vcpu)
3487{
8d5fb0dc 3488 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_IBS);
8ad35755
DH		 3489}
3490
2c70fe44
CB		 3491static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
3492{
8ad35755 3493retry:
8e236546 3494 kvm_s390_vcpu_request_handled(vcpu);
2fa6e1e1 3495 if (!kvm_request_pending(vcpu))
586b7ccd 3496 return 0;
2c70fe44
CB		 3497 /*
3498 * We use MMU_RELOAD just to re-arm the ipte notifier for the
b2d73b2a 3499 * guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
2c70fe44
CB		 3500 * This ensures that the ipte instruction for this request has
3501 * already finished. We might race against a second unmapper that
3502 * wants to set the blocking bit. Lets just retry the request loop.
3503 */
8ad35755 3504 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
2c70fe44 3505 int rc;
b2d73b2a
MS		 3506 rc = gmap_mprotect_notify(vcpu->arch.gmap,
3507 kvm_s390_get_prefix(vcpu),
3508 PAGE_SIZE * 2, PROT_WRITE);
aca411a4
JN		 3509 if (rc) {
3510 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
2c70fe44 3511 return rc;
aca411a4 3512 }
8ad35755 3513 goto retry;
2c70fe44 3514 }
8ad35755 3515
d3d692c8
DH		 3516 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
3517 vcpu->arch.sie_block->ihcpu = 0xffff;
3518 goto retry;
3519 }
3520
8ad35755
DH		 3521 if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
3522 if (!ibs_enabled(vcpu)) {
3523 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
ef8f4f49 3524 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IBS);
8ad35755
DH		 3525 }
3526 goto retry;
2c70fe44 3527 }
8ad35755
DH		 3528
3529 if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
3530 if (ibs_enabled(vcpu)) {
3531 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
9daecfc6 3532 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IBS);
8ad35755
DH		 3533 }
3534 goto retry;
3535 }
3536
6502a34c
DH		 3537 if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
3538 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
3539 goto retry;
3540 }
3541
190df4a2
CI		 3542 if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) {
3543 /*
c9f0a2b8 3544 * Disable CMM virtualization; we will emulate the ESSA
190df4a2
CI		 3545 * instruction manually, in order to provide additional
3546 * functionalities needed for live migration.
3547 */
3548 vcpu->arch.sie_block->ecb2 &= ~ECB2_CMMA;
3549 goto retry;
3550 }
3551
3552 if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) {
3553 /*
c9f0a2b8
JF		 3554 * Re-enable CMM virtualization if CMMA is available and
3555 * CMM has been used.
190df4a2
CI		 3556 */
3557 if ((vcpu->kvm->arch.use_cmma) &&
c9f0a2b8 3558 (vcpu->kvm->mm->context.uses_cmm))
190df4a2
CI		 3559 vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
3560 goto retry;
3561 }
3562
0759d068 3563 /* nothing to do, just clear the request */
72875d8a 3564 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
3194cdb7
DH		 3565 /* we left the vsie handler, nothing to do, just clear the request */
3566 kvm_clear_request(KVM_REQ_VSIE_RESTART, vcpu);
0759d068 3567
2c70fe44
CB		 3568 return 0;
3569}
3570
0e7def5f
DH		 3571void kvm_s390_set_tod_clock(struct kvm *kvm,
3572 const struct kvm_s390_vm_tod_clock *gtod)
8fa1696e
CW		 3573{
3574 struct kvm_vcpu *vcpu;
3575 struct kvm_s390_tod_clock_ext htod;
3576 int i;
3577
3578 mutex_lock(&kvm->lock);
3579 preempt_disable();
3580
3581 get_tod_clock_ext((char *)&htod);
3582
3583 kvm->arch.epoch = gtod->tod - htod.tod;
0e7def5f
DH		 3584 kvm->arch.epdx = 0;
3585 if (test_kvm_facility(kvm, 139)) {
3586 kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
3587 if (kvm->arch.epoch > gtod->tod)
3588 kvm->arch.epdx -= 1;
3589 }
8fa1696e
CW		 3590
3591 kvm_s390_vcpu_block_all(kvm);
3592 kvm_for_each_vcpu(i, vcpu, kvm) {
3593 vcpu->arch.sie_block->epoch = kvm->arch.epoch;
3594 vcpu->arch.sie_block->epdx = kvm->arch.epdx;
3595 }
3596
3597 kvm_s390_vcpu_unblock_all(kvm);
3598 preempt_enable();
3599 mutex_unlock(&kvm->lock);
3600}
3601
fa576c58
TH		 3602/**
3603 * kvm_arch_fault_in_page - fault-in guest page if necessary
3604 * @vcpu: The corresponding virtual cpu
3605 * @gpa: Guest physical address
3606 * @writable: Whether the page should be writable or not
3607 *
3608 * Make sure that a guest page has been faulted-in on the host.
3609 *
3610 * Return: Zero on success, negative error code otherwise.
3611 */
3612long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
24eb3a82 3613{
527e30b4
MS		 3614 return gmap_fault(vcpu->arch.gmap, gpa,
3615 writable ? FAULT_FLAG_WRITE : 0);
24eb3a82
DD		 3616}
3617
3c038e6b
DD		 3618static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
3619 unsigned long token)
3620{
3621 struct kvm_s390_interrupt inti;
383d0b05 3622 struct kvm_s390_irq irq;
3c038e6b
DD		 3623
3624 if (start_token) {
383d0b05
JF		 3625 irq.u.ext.ext_params2 = token;
3626 irq.type = KVM_S390_INT_PFAULT_INIT;
3627 WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
3c038e6b
DD		 3628 } else {
3629 inti.type = KVM_S390_INT_PFAULT_DONE;
383d0b05 3630 inti.parm64 = token;
3c038e6b
DD		 3631 WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
3632 }
3633}
3634
3635void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
3636 struct kvm_async_pf *work)
3637{
3638 trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
3639 __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
3640}
3641
3642void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
3643 struct kvm_async_pf *work)
3644{
3645 trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
3646 __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
3647}
3648
3649void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
3650 struct kvm_async_pf *work)
3651{
3652 /* s390 will always inject the page directly */
3653}
3654
3655bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
3656{
3657 /*
3658 * s390 will always inject the page directly,
3659 * but we still want check_async_completion to cleanup
3660 */
3661 return true;
3662}
3663
3664static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
3665{
3666 hva_t hva;
3667 struct kvm_arch_async_pf arch;
3668 int rc;
3669
3670 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3671 return 0;
3672 if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
3673 vcpu->arch.pfault_compare)
3674 return 0;
3675 if (psw_extint_disabled(vcpu))
3676 return 0;
9a022067 3677 if (kvm_s390_vcpu_has_irq(vcpu, 0))
3c038e6b 3678 return 0;
b9224cd7 3679 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK))
3c038e6b
DD		 3680 return 0;
3681 if (!vcpu->arch.gmap->pfault_enabled)
3682 return 0;
3683
81480cc1
HC		 3684 hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
3685 hva += current->thread.gmap_addr & ~PAGE_MASK;
3686 if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
3c038e6b
DD		 3687 return 0;
3688
3689 rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
3690 return rc;
3691}
3692
3fb4c40f 3693static int vcpu_pre_run(struct kvm_vcpu *vcpu)
b0c632db 3694{
3fb4c40f 3695 int rc, cpuflags;
e168bf8d 3696
3c038e6b
DD		 3697 /*
3698 * On s390 notifications for arriving pages will be delivered directly
3699 * to the guest but the house keeping for completed pfaults is
3700 * handled outside the worker.
3701 */
3702 kvm_check_async_pf_completion(vcpu);
3703
7ec7c8c7
CB		 3704 vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
3705 vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
b0c632db
HC		 3706
3707 if (need_resched())
3708 schedule();
3709
d3a73acb 3710 if (test_cpu_flag(CIF_MCCK_PENDING))
71cde587
CB		 3711 s390_handle_mcck();
3712
79395031
JF		 3713 if (!kvm_is_ucontrol(vcpu->kvm)) {
3714 rc = kvm_s390_deliver_pending_interrupts(vcpu);
3715 if (rc)
3716 return rc;
3717 }
0ff31867 3718
2c70fe44
CB		 3719 rc = kvm_s390_handle_requests(vcpu);
3720 if (rc)
3721 return rc;
3722
27291e21
DH		 3723 if (guestdbg_enabled(vcpu)) {
3724 kvm_s390_backup_guest_per_regs(vcpu);
3725 kvm_s390_patch_guest_per_regs(vcpu);
3726 }
3727
9f30f621
MM		 3728 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.gisa_int.kicked_mask);
3729
b0c632db 3730 vcpu->arch.sie_block->icptcode = 0;
3fb4c40f
TH		 3731 cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
3732 VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
3733 trace_kvm_s390_sie_enter(vcpu, cpuflags);
2b29a9fd 3734
3fb4c40f
TH		 3735 return 0;
3736}
3737
492d8642
TH		 3738static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
3739{
56317920
DH		 3740 struct kvm_s390_pgm_info pgm_info = {
3741 .code = PGM_ADDRESSING,
3742 };
3743 u8 opcode, ilen;
492d8642
TH		 3744 int rc;
3745
3746 VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
3747 trace_kvm_s390_sie_fault(vcpu);
3748
3749 /*
3750 * We want to inject an addressing exception, which is defined as a
3751 * suppressing or terminating exception. However, since we came here
3752 * by a DAT access exception, the PSW still points to the faulting
3753 * instruction since DAT exceptions are nullifying. So we've got
3754 * to look up the current opcode to get the length of the instruction
3755 * to be able to forward the PSW.
3756 */
3fa8cad7 3757 rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
56317920 3758 ilen = insn_length(opcode);
9b0d721a
DH		 3759 if (rc < 0) {
3760 return rc;
3761 } else if (rc) {
3762 /* Instruction-Fetching Exceptions - we can't detect the ilen.
3763 * Forward by arbitrary ilc, injection will take care of
3764 * nullification if necessary.
3765 */
3766 pgm_info = vcpu->arch.pgm;
3767 ilen = 4;
3768 }
56317920
DH		 3769 pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
3770 kvm_s390_forward_psw(vcpu, ilen);
3771 return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
492d8642
TH		 3772}
3773
3fb4c40f
TH		 3774static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
3775{
4d62fcc0
QH		 3776 struct mcck_volatile_info *mcck_info;
3777 struct sie_page *sie_page;
3778
2b29a9fd
DD		 3779 VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
3780 vcpu->arch.sie_block->icptcode);
3781 trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
3782
27291e21
DH		 3783 if (guestdbg_enabled(vcpu))
3784 kvm_s390_restore_guest_per_regs(vcpu);
3785
7ec7c8c7
CB		 3786 vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
3787 vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
71f116bf 3788
4d62fcc0
QH		 3789 if (exit_reason == -EINTR) {
3790 VCPU_EVENT(vcpu, 3, "%s", "machine check");
3791 sie_page = container_of(vcpu->arch.sie_block,
3792 struct sie_page, sie_block);
3793 mcck_info = &sie_page->mcck_info;
3794 kvm_s390_reinject_machine_check(vcpu, mcck_info);
3795 return 0;
3796 }
3797
71f116bf
DH		 3798 if (vcpu->arch.sie_block->icptcode > 0) {
3799 int rc = kvm_handle_sie_intercept(vcpu);
3800
3801 if (rc != -EOPNOTSUPP)
3802 return rc;
3803 vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
3804 vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
3805 vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
3806 vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
3807 return -EREMOTE;
3808 } else if (exit_reason != -EFAULT) {
3809 vcpu->stat.exit_null++;
3810 return 0;
210b1607
TH		 3811 } else if (kvm_is_ucontrol(vcpu->kvm)) {
3812 vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
3813 vcpu->run->s390_ucontrol.trans_exc_code =
3814 current->thread.gmap_addr;
3815 vcpu->run->s390_ucontrol.pgm_code = 0x10;
71f116bf 3816 return -EREMOTE;
24eb3a82 3817 } else if (current->thread.gmap_pfault) {
3c038e6b 3818 trace_kvm_s390_major_guest_pfault(vcpu);
24eb3a82 3819 current->thread.gmap_pfault = 0;
71f116bf
DH		 3820 if (kvm_arch_setup_async_pf(vcpu))
3821 return 0;
3822 return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
a76ccff6 3823 }
71f116bf 3824 return vcpu_post_run_fault_in_sie(vcpu);
3fb4c40f
TH		 3825}
3826
3827static int __vcpu_run(struct kvm_vcpu *vcpu)
3828{
3829 int rc, exit_reason;
3830
800c1065
TH		 3831 /*
3832 * We try to hold kvm->srcu during most of vcpu_run (except when run-
3833 * ning the guest), so that memslots (and other stuff) are protected
3834 */
3835 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3836
a76ccff6
TH		 3837 do {
3838 rc = vcpu_pre_run(vcpu);
3839 if (rc)
3840 break;
3fb4c40f 3841
800c1065 3842 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
a76ccff6
TH		 3843 /*
3844 * As PF_VCPU will be used in fault handler, between
3845 * guest_enter and guest_exit should be no uaccess.
3846 */
0097d12e 3847 local_irq_disable();
6edaa530 3848 guest_enter_irqoff();
db0758b2 3849 __disable_cpu_timer_accounting(vcpu);
0097d12e 3850 local_irq_enable();
a76ccff6
TH		 3851 exit_reason = sie64a(vcpu->arch.sie_block,
3852 vcpu->run->s.regs.gprs);
0097d12e 3853 local_irq_disable();
db0758b2 3854 __enable_cpu_timer_accounting(vcpu);
6edaa530 3855 guest_exit_irqoff();
0097d12e 3856 local_irq_enable();
800c1065 3857 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
a76ccff6
TH		 3858
3859 rc = vcpu_post_run(vcpu, exit_reason);
27291e21 3860 } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
3fb4c40f 3861
800c1065 3862 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
e168bf8d 3863 return rc;
b0c632db
HC		 3864}
3865
b028ee3e
DH		 3866static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
3867{
4d5f2c04 3868 struct runtime_instr_cb *riccb;
4e0b1ab7 3869 struct gs_cb *gscb;
4d5f2c04
CB		 3870
3871 riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
4e0b1ab7 3872 gscb = (struct gs_cb *) &kvm_run->s.regs.gscb;
b028ee3e
DH		 3873 vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
3874 vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
3875 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
3876 kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
3877 if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
3878 memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
d3d692c8
DH		 3879 /* some control register changes require a tlb flush */
3880 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
b028ee3e
DH		 3881 }
3882 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
4287f247 3883 kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
b028ee3e
DH		 3884 vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
3885 vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
3886 vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
3887 vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
3888 }
3889 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
3890 vcpu->arch.pfault_token = kvm_run->s.regs.pft;
3891 vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
3892 vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
9fbd8082
DH		 3893 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3894 kvm_clear_async_pf_completion_queue(vcpu);
b028ee3e 3895 }
80cd8763
FZ		 3896 /*
3897 * If userspace sets the riccb (e.g. after migration) to a valid state,
3898 * we should enable RI here instead of doing the lazy enablement.
3899 */
3900 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
4d5f2c04 3901 test_kvm_facility(vcpu->kvm, 64) &&
bb59c2da 3902 riccb->v &&
0c9d8683 3903 !(vcpu->arch.sie_block->ecb3 & ECB3_RI)) {
4d5f2c04 3904 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
0c9d8683 3905 vcpu->arch.sie_block->ecb3 |= ECB3_RI;
80cd8763 3906 }
4e0b1ab7
FZ		 3907 /*
3908 * If userspace sets the gscb (e.g. after migration) to non-zero,
3909 * we should enable GS here instead of doing the lazy enablement.
3910 */
3911 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) &&
3912 test_kvm_facility(vcpu->kvm, 133) &&
3913 gscb->gssm &&
3914 !vcpu->arch.gs_enabled) {
3915 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)");
3916 vcpu->arch.sie_block->ecb |= ECB_GS;
3917 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
3918 vcpu->arch.gs_enabled = 1;
80cd8763 3919 }
35b3fde6
CB		 3920 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_BPBC) &&
3921 test_kvm_facility(vcpu->kvm, 82)) {
3922 vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
3923 vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0;
3924 }
31d8b8d4
CB		 3925 save_access_regs(vcpu->arch.host_acrs);
3926 restore_access_regs(vcpu->run->s.regs.acrs);
e1788bb9
CB		 3927 /* save host (userspace) fprs/vrs */
3928 save_fpu_regs();
3929 vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
3930 vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
3931 if (MACHINE_HAS_VX)
3932 current->thread.fpu.regs = vcpu->run->s.regs.vrs;
3933 else
3934 current->thread.fpu.regs = vcpu->run->s.regs.fprs;
3935 current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
3936 if (test_fp_ctl(current->thread.fpu.fpc))
3937 /* User space provided an invalid FPC, let's clear it */
3938 current->thread.fpu.fpc = 0;
4e0b1ab7
FZ		 3939 if (MACHINE_HAS_GS) {
3940 preempt_disable();
3941 __ctl_set_bit(2, 4);
3942 if (current->thread.gs_cb) {
3943 vcpu->arch.host_gscb = current->thread.gs_cb;
3944 save_gs_cb(vcpu->arch.host_gscb);
3945 }
3946 if (vcpu->arch.gs_enabled) {
3947 current->thread.gs_cb = (struct gs_cb *)
3948 &vcpu->run->s.regs.gscb;
3949 restore_gs_cb(current->thread.gs_cb);
3950 }
3951 preempt_enable();
3952 }
a3da7b4a 3953 /* SIE will load etoken directly from SDNX and therefore kvm_run */
80cd8763 3954
b028ee3e
DH		 3955 kvm_run->kvm_dirty_regs = 0;
3956}
3957
3958static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
3959{
3960 kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
3961 kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
3962 kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
3963 memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
4287f247 3964 kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
b028ee3e
DH		 3965 kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
3966 kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
3967 kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
3968 kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
3969 kvm_run->s.regs.pft = vcpu->arch.pfault_token;
3970 kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
3971 kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
35b3fde6 3972 kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC;
31d8b8d4
CB		 3973 save_access_regs(vcpu->run->s.regs.acrs);
3974 restore_access_regs(vcpu->arch.host_acrs);
e1788bb9
CB		 3975 /* Save guest register state */
3976 save_fpu_regs();
3977 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
3978 /* Restore will be done lazily at return */
3979 current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
3980 current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
4e0b1ab7
FZ		 3981 if (MACHINE_HAS_GS) {
3982 __ctl_set_bit(2, 4);
3983 if (vcpu->arch.gs_enabled)
3984 save_gs_cb(current->thread.gs_cb);
3985 preempt_disable();
3986 current->thread.gs_cb = vcpu->arch.host_gscb;
3987 restore_gs_cb(vcpu->arch.host_gscb);
3988 preempt_enable();
3989 if (!vcpu->arch.host_gscb)
3990 __ctl_clear_bit(2, 4);
3991 vcpu->arch.host_gscb = NULL;
3992 }
a3da7b4a 3993 /* SIE will save etoken directly into SDNX and therefore kvm_run */
b028ee3e
DH		 3994}
3995
b0c632db
HC		 3996int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
3997{
8f2abe6a 3998 int rc;
b0c632db 3999
460df4c1
PB		 4000 if (kvm_run->immediate_exit)
4001 return -EINTR;
4002
accb757d
CD		 4003 vcpu_load(vcpu);
4004
27291e21
DH		 4005 if (guestdbg_exit_pending(vcpu)) {
4006 kvm_s390_prepare_debug_exit(vcpu);
accb757d
CD		 4007 rc = 0;
4008 goto out;
27291e21
DH		 4009 }
4010
20b7035c 4011 kvm_sigset_activate(vcpu);
b0c632db 4012
6352e4d2
DH		 4013 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
4014 kvm_s390_vcpu_start(vcpu);
4015 } else if (is_vcpu_stopped(vcpu)) {
ea2cdd27 4016 pr_err_ratelimited("can't run stopped vcpu %d\n",
6352e4d2 4017 vcpu->vcpu_id);
accb757d
CD		 4018 rc = -EINVAL;
4019 goto out;
6352e4d2 4020 }
b0c632db 4021
b028ee3e 4022 sync_regs(vcpu, kvm_run);
db0758b2 4023 enable_cpu_timer_accounting(vcpu);
d7b0b5eb 4024
dab4079d 4025 might_fault();
a76ccff6 4026 rc = __vcpu_run(vcpu);
9ace903d 4027
b1d16c49
CE		 4028 if (signal_pending(current) && !rc) {
4029 kvm_run->exit_reason = KVM_EXIT_INTR;
8f2abe6a 4030 rc = -EINTR;
b1d16c49 4031 }
8f2abe6a 4032
27291e21
DH		 4033 if (guestdbg_exit_pending(vcpu) && !rc) {
4034 kvm_s390_prepare_debug_exit(vcpu);
4035 rc = 0;
4036 }
4037
8f2abe6a 4038 if (rc == -EREMOTE) {
71f116bf 4039 /* userspace support is needed, kvm_run has been prepared */
8f2abe6a
CB		 4040 rc = 0;
4041 }
b0c632db 4042
db0758b2 4043 disable_cpu_timer_accounting(vcpu);
b028ee3e 4044 store_regs(vcpu, kvm_run);
d7b0b5eb 4045
20b7035c 4046 kvm_sigset_deactivate(vcpu);
b0c632db 4047
b0c632db 4048 vcpu->stat.exit_userspace++;
accb757d
CD		 4049out:
4050 vcpu_put(vcpu);
7e8e6ab4 4051 return rc;
b0c632db
HC		 4052}
4053
b0c632db
HC		 4054/*
4055 * store status at address
4056 * we use have two special cases:
4057 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
4058 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
4059 */
d0bce605 4060int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
b0c632db 4061{
092670cd 4062 unsigned char archmode = 1;
9abc2a08 4063 freg_t fprs[NUM_FPRS];
fda902cb 4064 unsigned int px;
4287f247 4065 u64 clkcomp, cputm;
d0bce605 4066 int rc;
b0c632db 4067
d9a3a09a 4068 px = kvm_s390_get_prefix(vcpu);
d0bce605
HC		 4069 if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
4070 if (write_guest_abs(vcpu, 163, &archmode, 1))
b0c632db 4071 return -EFAULT;
d9a3a09a 4072 gpa = 0;
d0bce605
HC		 4073 } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
4074 if (write_guest_real(vcpu, 163, &archmode, 1))
b0c632db 4075 return -EFAULT;
d9a3a09a
MS		 4076 gpa = px;
4077 } else
4078 gpa -= __LC_FPREGS_SAVE_AREA;
9abc2a08
DH		 4079
4080 /* manually convert vector registers if necessary */
4081 if (MACHINE_HAS_VX) {
9522b37f 4082 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
9abc2a08
DH		 4083 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
4084 fprs, 128);
4085 } else {
4086 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
6fd8e67d 4087 vcpu->run->s.regs.fprs, 128);
9abc2a08 4088 }
d9a3a09a 4089 rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
d0bce605 4090 vcpu->run->s.regs.gprs, 128);
d9a3a09a 4091 rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
d0bce605 4092 &vcpu->arch.sie_block->gpsw, 16);
d9a3a09a 4093 rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
fda902cb 4094 &px, 4);
d9a3a09a 4095 rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
9abc2a08 4096 &vcpu->run->s.regs.fpc, 4);
d9a3a09a 4097 rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
d0bce605 4098 &vcpu->arch.sie_block->todpr, 4);
4287f247 4099 cputm = kvm_s390_get_cpu_timer(vcpu);
d9a3a09a 4100 rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
4287f247 4101 &cputm, 8);
178bd789 4102 clkcomp = vcpu->arch.sie_block->ckc >> 8;
d9a3a09a 4103 rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
d0bce605 4104 &clkcomp, 8);
d9a3a09a 4105 rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
d0bce605 4106 &vcpu->run->s.regs.acrs, 64);
d9a3a09a 4107 rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
d0bce605
HC		 4108 &vcpu->arch.sie_block->gcr, 128);
4109 return rc ? -EFAULT : 0;
b0c632db
HC		 4110}
4111
e879892c
TH		 4112int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
4113{
4114 /*
4115 * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
31d8b8d4 4116 * switch in the run ioctl. Let's update our copies before we save
e879892c
TH		 4117 * it into the save area
4118 */
d0164ee2 4119 save_fpu_regs();
9abc2a08 4120 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
e879892c
TH		 4121 save_access_regs(vcpu->run->s.regs.acrs);
4122
4123 return kvm_s390_store_status_unloaded(vcpu, addr);
4124}
4125
8ad35755
DH		 4126static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
4127{
4128 kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
8e236546 4129 kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
8ad35755
DH		 4130}
4131
4132static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
4133{
4134 unsigned int i;
4135 struct kvm_vcpu *vcpu;
4136
4137 kvm_for_each_vcpu(i, vcpu, kvm) {
4138 __disable_ibs_on_vcpu(vcpu);
4139 }
4140}
4141
4142static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
4143{
09a400e7
DH		 4144 if (!sclp.has_ibs)
4145 return;
8ad35755 4146 kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
8e236546 4147 kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
8ad35755
DH		 4148}
4149
6852d7b6
DH		 4150void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
4151{
8ad35755
DH		 4152 int i, online_vcpus, started_vcpus = 0;
4153
4154 if (!is_vcpu_stopped(vcpu))
4155 return;
4156
6852d7b6 4157 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
8ad35755 4158 /* Only one cpu at a time may enter/leave the STOPPED state. */
433b9ee4 4159 spin_lock(&vcpu->kvm->arch.start_stop_lock);
8ad35755
DH		 4160 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
4161
4162 for (i = 0; i < online_vcpus; i++) {
4163 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
4164 started_vcpus++;
4165 }
4166
4167 if (started_vcpus == 0) {
4168 /* we're the only active VCPU -> speed it up */
4169 __enable_ibs_on_vcpu(vcpu);
4170 } else if (started_vcpus == 1) {
4171 /*
4172 * As we are starting a second VCPU, we have to disable
4173 * the IBS facility on all VCPUs to remove potentially
4174 * oustanding ENABLE requests.
4175 */
4176 __disable_ibs_on_all_vcpus(vcpu->kvm);
4177 }
4178
9daecfc6 4179 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_STOPPED);
8ad35755
DH		 4180 /*
4181 * Another VCPU might have used IBS while we were offline.
4182 * Let's play safe and flush the VCPU at startup.
4183 */
d3d692c8 4184 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
433b9ee4 4185 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
8ad35755 4186 return;
6852d7b6
DH		 4187}
4188
4189void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
4190{
8ad35755
DH		 4191 int i, online_vcpus, started_vcpus = 0;
4192 struct kvm_vcpu *started_vcpu = NULL;
4193
4194 if (is_vcpu_stopped(vcpu))
4195 return;
4196
6852d7b6 4197 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
8ad35755 4198 /* Only one cpu at a time may enter/leave the STOPPED state. */
433b9ee4 4199 spin_lock(&vcpu->kvm->arch.start_stop_lock);
8ad35755
DH		 4200 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
4201
32f5ff63 4202 /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
6cddd432 4203 kvm_s390_clear_stop_irq(vcpu);
32f5ff63 4204
ef8f4f49 4205 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOPPED);
8ad35755
DH		 4206 __disable_ibs_on_vcpu(vcpu);
4207
4208 for (i = 0; i < online_vcpus; i++) {
4209 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
4210 started_vcpus++;
4211 started_vcpu = vcpu->kvm->vcpus[i];
4212 }
4213 }
4214
4215 if (started_vcpus == 1) {
4216 /*
4217 * As we only have one VCPU left, we want to enable the
4218 * IBS facility for that VCPU to speed it up.
4219 */
4220 __enable_ibs_on_vcpu(started_vcpu);
4221 }
4222
433b9ee4 4223 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
8ad35755 4224 return;
6852d7b6
DH		 4225}
4226
d6712df9
CH		 4227static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
4228 struct kvm_enable_cap *cap)
4229{
4230 int r;
4231
4232 if (cap->flags)
4233 return -EINVAL;
4234
4235 switch (cap->cap) {
fa6b7fe9
CH		 4236 case KVM_CAP_S390_CSS_SUPPORT:
4237 if (!vcpu->kvm->arch.css_support) {
4238 vcpu->kvm->arch.css_support = 1;
c92ea7b9 4239 VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
fa6b7fe9
CH		 4240 trace_kvm_s390_enable_css(vcpu->kvm);
4241 }
4242 r = 0;
4243 break;
d6712df9
CH		 4244 default:
4245 r = -EINVAL;
4246 break;
4247 }
4248 return r;
4249}
4250
41408c28
TH		 4251static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
4252 struct kvm_s390_mem_op *mop)
4253{
4254 void __user *uaddr = (void __user *)mop->buf;
4255 void *tmpbuf = NULL;
4256 int r, srcu_idx;
4257 const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
4258 | KVM_S390_MEMOP_F_CHECK_ONLY;
4259
10607e60 4260 if (mop->flags & ~supported_flags || mop->ar >= NUM_ACRS || !mop->size)
41408c28
TH		 4261 return -EINVAL;
4262
4263 if (mop->size > MEM_OP_MAX_SIZE)
4264 return -E2BIG;
4265
4266 if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
4267 tmpbuf = vmalloc(mop->size);
4268 if (!tmpbuf)
4269 return -ENOMEM;
4270 }
4271
4272 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4273
4274 switch (mop->op) {
4275 case KVM_S390_MEMOP_LOGICAL_READ:
4276 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
92c96321
DH		 4277 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4278 mop->size, GACC_FETCH);
41408c28
TH		 4279 break;
4280 }
4281 r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4282 if (r == 0) {
4283 if (copy_to_user(uaddr, tmpbuf, mop->size))
4284 r = -EFAULT;
4285 }
4286 break;
4287 case KVM_S390_MEMOP_LOGICAL_WRITE:
4288 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
92c96321
DH		 4289 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4290 mop->size, GACC_STORE);
41408c28
TH		 4291 break;
4292 }
4293 if (copy_from_user(tmpbuf, uaddr, mop->size)) {
4294 r = -EFAULT;
4295 break;
4296 }
4297 r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4298 break;
4299 default:
4300 r = -EINVAL;
4301 }
4302
4303 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
4304
4305 if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
4306 kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
4307
4308 vfree(tmpbuf);
4309 return r;
4310}
4311
5cb0944c
PB		 4312long kvm_arch_vcpu_async_ioctl(struct file *filp,
4313 unsigned int ioctl, unsigned long arg)
b0c632db
HC		 4314{
4315 struct kvm_vcpu *vcpu = filp->private_data;
4316 void __user *argp = (void __user *)arg;
4317
93736624 4318 switch (ioctl) {
47b43c52
JF		 4319 case KVM_S390_IRQ: {
4320 struct kvm_s390_irq s390irq;
4321
47b43c52 4322 if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
9b062471
CD		 4323 return -EFAULT;
4324 return kvm_s390_inject_vcpu(vcpu, &s390irq);
47b43c52 4325 }
93736624 4326 case KVM_S390_INTERRUPT: {
ba5c1e9b 4327 struct kvm_s390_interrupt s390int;
53936b5b 4328 struct kvm_s390_irq s390irq = {};
ba5c1e9b
CO		 4329
4330 if (copy_from_user(&s390int, argp, sizeof(s390int)))
9b062471 4331 return -EFAULT;
383d0b05
JF		 4332 if (s390int_to_s390irq(&s390int, &s390irq))
4333 return -EINVAL;
9b062471 4334 return kvm_s390_inject_vcpu(vcpu, &s390irq);
ba5c1e9b 4335 }
9b062471 4336 }
5cb0944c
PB		 4337 return -ENOIOCTLCMD;
4338}
4339
4340long kvm_arch_vcpu_ioctl(struct file *filp,
4341 unsigned int ioctl, unsigned long arg)
4342{
4343 struct kvm_vcpu *vcpu = filp->private_data;
4344 void __user *argp = (void __user *)arg;
4345 int idx;
4346 long r;
9b062471
CD		 4347
4348 vcpu_load(vcpu);
4349
4350 switch (ioctl) {
b0c632db 4351 case KVM_S390_STORE_STATUS:
800c1065 4352 idx = srcu_read_lock(&vcpu->kvm->srcu);
bc923cc9 4353 r = kvm_s390_vcpu_store_status(vcpu, arg);
800c1065 4354 srcu_read_unlock(&vcpu->kvm->srcu, idx);
bc923cc9 4355 break;
b0c632db
HC		 4356 case KVM_S390_SET_INITIAL_PSW: {
4357 psw_t psw;
4358
bc923cc9 4359 r = -EFAULT;
b0c632db 4360 if (copy_from_user(&psw, argp, sizeof(psw)))
bc923cc9
AK		 4361 break;
4362 r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
4363 break;
b0c632db
HC		 4364 }
4365 case KVM_S390_INITIAL_RESET:
bc923cc9
AK		 4366 r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
4367 break;
14eebd91
CO		 4368 case KVM_SET_ONE_REG:
4369 case KVM_GET_ONE_REG: {
4370 struct kvm_one_reg reg;
4371 r = -EFAULT;
4372 if (copy_from_user(&reg, argp, sizeof(reg)))
4373 break;
4374 if (ioctl == KVM_SET_ONE_REG)
4375 r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, &reg);
4376 else
4377 r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, &reg);
4378 break;
4379 }
27e0393f
CO		 4380#ifdef CONFIG_KVM_S390_UCONTROL
4381 case KVM_S390_UCAS_MAP: {
4382 struct kvm_s390_ucas_mapping ucasmap;
4383
4384 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4385 r = -EFAULT;
4386 break;
4387 }
4388
4389 if (!kvm_is_ucontrol(vcpu->kvm)) {
4390 r = -EINVAL;
4391 break;
4392 }
4393
4394 r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
4395 ucasmap.vcpu_addr, ucasmap.length);
4396 break;
4397 }
4398 case KVM_S390_UCAS_UNMAP: {
4399 struct kvm_s390_ucas_mapping ucasmap;
4400
4401 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4402 r = -EFAULT;
4403 break;
4404 }
4405
4406 if (!kvm_is_ucontrol(vcpu->kvm)) {
4407 r = -EINVAL;
4408 break;
4409 }
4410
4411 r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
4412 ucasmap.length);
4413 break;
4414 }
4415#endif
ccc7910f 4416 case KVM_S390_VCPU_FAULT: {
527e30b4 4417 r = gmap_fault(vcpu->arch.gmap, arg, 0);
ccc7910f
CO		 4418 break;
4419 }
d6712df9
CH		 4420 case KVM_ENABLE_CAP:
4421 {
4422 struct kvm_enable_cap cap;
4423 r = -EFAULT;
4424 if (copy_from_user(&cap, argp, sizeof(cap)))
4425 break;
4426 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
4427 break;
4428 }
41408c28
TH		 4429 case KVM_S390_MEM_OP: {
4430 struct kvm_s390_mem_op mem_op;
4431
4432 if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
4433 r = kvm_s390_guest_mem_op(vcpu, &mem_op);
4434 else
4435 r = -EFAULT;
4436 break;
4437 }
816c7667
JF		 4438 case KVM_S390_SET_IRQ_STATE: {
4439 struct kvm_s390_irq_state irq_state;
4440
4441 r = -EFAULT;
4442 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4443 break;
4444 if (irq_state.len > VCPU_IRQS_MAX_BUF ||
4445 irq_state.len == 0 ||
4446 irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
4447 r = -EINVAL;
4448 break;
4449 }
bb64da9a 4450 /* do not use irq_state.flags, it will break old QEMUs */
816c7667
JF		 4451 r = kvm_s390_set_irq_state(vcpu,
4452 (void __user *) irq_state.buf,
4453 irq_state.len);
4454 break;
4455 }
4456 case KVM_S390_GET_IRQ_STATE: {
4457 struct kvm_s390_irq_state irq_state;
4458
4459 r = -EFAULT;
4460 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4461 break;
4462 if (irq_state.len == 0) {
4463 r = -EINVAL;
4464 break;
4465 }
bb64da9a 4466 /* do not use irq_state.flags, it will break old QEMUs */
816c7667
JF		 4467 r = kvm_s390_get_irq_state(vcpu,
4468 (__u8 __user *) irq_state.buf,
4469 irq_state.len);
4470 break;
4471 }
b0c632db 4472 default:
3e6afcf1 4473 r = -ENOTTY;
b0c632db 4474 }
9b062471
CD		 4475
4476 vcpu_put(vcpu);
bc923cc9 4477 return r;
b0c632db
HC		 4478}
4479
1499fa80 4480vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
5b1c1493
CO		 4481{
4482#ifdef CONFIG_KVM_S390_UCONTROL
4483 if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
4484 && (kvm_is_ucontrol(vcpu->kvm))) {
4485 vmf->page = virt_to_page(vcpu->arch.sie_block);
4486 get_page(vmf->page);
4487 return 0;
4488 }
4489#endif
4490 return VM_FAULT_SIGBUS;
4491}
4492
5587027c
AK		 4493int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
4494 unsigned long npages)
db3fe4eb
TY		 4495{
4496 return 0;
4497}
4498
b0c632db 4499/* Section: memory related */
f7784b8e
MT		 4500int kvm_arch_prepare_memory_region(struct kvm *kvm,
4501 struct kvm_memory_slot *memslot,
09170a49 4502 const struct kvm_userspace_memory_region *mem,
7b6195a9 4503 enum kvm_mr_change change)
b0c632db 4504{
dd2887e7
NW		 4505 /* A few sanity checks. We can have memory slots which have to be
4506 located/ended at a segment boundary (1MB). The memory in userland is
4507 ok to be fragmented into various different vmas. It is okay to mmap()
4508 and munmap() stuff in this slot after doing this call at any time */
b0c632db 4509
598841ca 4510 if (mem->userspace_addr & 0xffffful)
b0c632db
HC		 4511 return -EINVAL;
4512
598841ca 4513 if (mem->memory_size & 0xffffful)
b0c632db
HC		 4514 return -EINVAL;
4515
a3a92c31
DD		 4516 if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
4517 return -EINVAL;
4518
f7784b8e
MT		 4519 return 0;
4520}
4521
4522void kvm_arch_commit_memory_region(struct kvm *kvm,
09170a49 4523 const struct kvm_userspace_memory_region *mem,
8482644a 4524 const struct kvm_memory_slot *old,
f36f3f28 4525 const struct kvm_memory_slot *new,
8482644a 4526 enum kvm_mr_change change)
f7784b8e 4527{
19ec166c 4528 int rc = 0;
598841ca 4529
19ec166c
CB		 4530 switch (change) {
4531 case KVM_MR_DELETE:
4532 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4533 old->npages * PAGE_SIZE);
4534 break;
4535 case KVM_MR_MOVE:
4536 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4537 old->npages * PAGE_SIZE);
4538 if (rc)
4539 break;
4540 /* FALLTHROUGH */
4541 case KVM_MR_CREATE:
4542 rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
4543 mem->guest_phys_addr, mem->memory_size);
4544 break;
4545 case KVM_MR_FLAGS_ONLY:
4546 break;
4547 default:
4548 WARN(1, "Unknown KVM MR CHANGE: %d\n", change);
4549 }
598841ca 4550 if (rc)
ea2cdd27 4551 pr_warn("failed to commit memory region\n");
598841ca 4552 return;
b0c632db
HC		 4553}
4554
60a37709
AY		 4555static inline unsigned long nonhyp_mask(int i)
4556{
4557 unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
4558
4559 return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
4560}
4561
3491caf2
CB		 4562void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
4563{
4564 vcpu->valid_wakeup = false;
4565}
4566
b0c632db
HC		 4567static int __init kvm_s390_init(void)
4568{
60a37709
AY		 4569 int i;
4570
07197fd0 4571 if (!sclp.has_sief2) {
8d43d570 4572 pr_info("SIE is not available\n");
07197fd0
DH		 4573 return -ENODEV;
4574 }
4575
a4499382 4576 if (nested && hpage) {
8d43d570 4577 pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n");
a4499382
JF		 4578 return -EINVAL;
4579 }
4580
60a37709 4581 for (i = 0; i < 16; i++)
c3b9e3e1 4582 kvm_s390_fac_base[i] |=
60a37709
AY		 4583 S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
4584
9d8d5786 4585 return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
b0c632db
HC		 4586}
4587
4588static void __exit kvm_s390_exit(void)
4589{
4590 kvm_exit();
4591}
4592
4593module_init(kvm_s390_init);
4594module_exit(kvm_s390_exit);
566af940
CH		 4595
4596/*
4597 * Enable autoloading of the kvm module.
4598 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
4599 * since x86 takes a different approach.
4600 */
4601#include <linux/miscdevice.h>
4602MODULE_ALIAS_MISCDEV(KVM_MINOR);
4603MODULE_ALIAS("devname:kvm");
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