1 // SPDX-License-Identifier: GPL-2.0
3 * hosting IBM Z kernel virtual machines (s390x)
5 * Copyright IBM Corp. 2008, 2018
7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
9 * Heiko Carstens <heiko.carstens@de.ibm.com>
10 * Christian Ehrhardt <ehrhardt@de.ibm.com>
11 * Jason J. Herne <jjherne@us.ibm.com>
14 #define KMSG_COMPONENT "kvm-s390"
15 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
17 #include <linux/compiler.h>
18 #include <linux/err.h>
20 #include <linux/hrtimer.h>
21 #include <linux/init.h>
22 #include <linux/kvm.h>
23 #include <linux/kvm_host.h>
24 #include <linux/mman.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/random.h>
28 #include <linux/slab.h>
29 #include <linux/timer.h>
30 #include <linux/vmalloc.h>
31 #include <linux/bitmap.h>
32 #include <linux/sched/signal.h>
33 #include <linux/string.h>
35 #include <asm/asm-offsets.h>
36 #include <asm/lowcore.h>
38 #include <asm/pgtable.h>
41 #include <asm/switch_to.h>
44 #include <asm/cpacf.h>
45 #include <asm/timex.h>
50 #define CREATE_TRACE_POINTS
52 #include "trace-s390.h"
54 #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */
56 #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
57 (KVM_MAX_VCPUS + LOCAL_IRQS))
59 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
60 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
62 struct kvm_stats_debugfs_item debugfs_entries[] = {
63 { "userspace_handled", VCPU_STAT(exit_userspace) },
64 { "exit_null", VCPU_STAT(exit_null) },
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) },
68 { "exit_io_request", VCPU_STAT(exit_io_request) },
69 { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
70 { "exit_instruction", VCPU_STAT(exit_instruction) },
71 { "exit_pei", VCPU_STAT(exit_pei) },
72 { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
73 { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
74 { "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
75 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
76 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
77 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
78 { "halt_no_poll_steal", VCPU_STAT(halt_no_poll_steal) },
79 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
80 { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
81 { "instruction_lctl", VCPU_STAT(instruction_lctl) },
82 { "instruction_stctl", VCPU_STAT(instruction_stctl) },
83 { "instruction_stctg", VCPU_STAT(instruction_stctg) },
84 { "deliver_ckc", VCPU_STAT(deliver_ckc) },
85 { "deliver_cputm", VCPU_STAT(deliver_cputm) },
86 { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
87 { "deliver_external_call", VCPU_STAT(deliver_external_call) },
88 { "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
89 { "deliver_virtio", VCPU_STAT(deliver_virtio) },
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) },
93 { "deliver_program", VCPU_STAT(deliver_program) },
94 { "deliver_io", VCPU_STAT(deliver_io) },
95 { "deliver_machine_check", VCPU_STAT(deliver_machine_check) },
96 { "exit_wait_state", VCPU_STAT(exit_wait_state) },
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) },
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) },
117 { "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
118 { "instruction_ptff", VCPU_STAT(instruction_ptff) },
119 { "instruction_stidp", VCPU_STAT(instruction_stidp) },
120 { "instruction_sck", VCPU_STAT(instruction_sck) },
121 { "instruction_sckpf", VCPU_STAT(instruction_sckpf) },
122 { "instruction_spx", VCPU_STAT(instruction_spx) },
123 { "instruction_stpx", VCPU_STAT(instruction_stpx) },
124 { "instruction_stap", VCPU_STAT(instruction_stap) },
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) },
129 { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
130 { "instruction_essa", VCPU_STAT(instruction_essa) },
131 { "instruction_stsi", VCPU_STAT(instruction_stsi) },
132 { "instruction_stfl", VCPU_STAT(instruction_stfl) },
133 { "instruction_tb", VCPU_STAT(instruction_tb) },
134 { "instruction_tpi", VCPU_STAT(instruction_tpi) },
135 { "instruction_tprot", VCPU_STAT(instruction_tprot) },
136 { "instruction_tsch", VCPU_STAT(instruction_tsch) },
137 { "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
138 { "instruction_sie", VCPU_STAT(instruction_sie) },
139 { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
140 { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
141 { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
142 { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
143 { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
144 { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
145 { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
146 { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
147 { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
148 { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
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) },
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) },
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) },
161 { "instruction_diag_other", VCPU_STAT(diagnose_other) },
165 struct kvm_s390_tod_clock_ext {
171 /* allow nested virtualization in KVM (if enabled by user space) */
173 module_param(nested, int, S_IRUGO);
174 MODULE_PARM_DESC(nested, "Nested virtualization support");
176 /* allow 1m huge page guest backing, if !nested */
178 module_param(hpage, int, 0444);
179 MODULE_PARM_DESC(hpage, "1m huge page backing support");
181 /* maximum percentage of steal time for polling. >100 is treated like 100 */
182 static u8 halt_poll_max_steal = 10;
183 module_param(halt_poll_max_steal, byte, 0644);
184 MODULE_PARM_DESC(halt_poll_max_steal, "Maximum percentage of steal time to allow polling");
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.
191 #define SIZE_INTERNAL 16
194 * Base feature mask that defines default mask for facilities. Consists of the
195 * defines in FACILITIES_KVM and the non-hypervisor managed bits.
197 static unsigned long kvm_s390_fac_base[SIZE_INTERNAL] = { FACILITIES_KVM };
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.
202 static unsigned long kvm_s390_fac_ext[SIZE_INTERNAL] = { FACILITIES_KVM_CPUMODEL };
204 static unsigned long kvm_s390_fac_size(void)
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));
211 return SIZE_INTERNAL;
214 /* available cpu features supported by kvm */
215 static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
216 /* available subfunctions indicated via query / "test bit" */
217 static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;
219 static struct gmap_notifier gmap_notifier;
220 static struct gmap_notifier vsie_gmap_notifier;
221 debug_info_t *kvm_s390_dbf;
223 /* Section: not file related */
224 int kvm_arch_hardware_enable(void)
226 /* every s390 is virtualization enabled ;-) */
230 int kvm_arch_check_processor_compat(void)
235 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
238 static void kvm_clock_sync_scb(struct kvm_s390_sie_block *scb, u64 delta)
243 * The TOD jumps by delta, we have to compensate this by adding
244 * -delta to the epoch.
248 /* sign-extension - we're adding to signed values below */
253 if (scb->ecd & ECD_MEF) {
254 scb->epdx += delta_idx;
255 if (scb->epoch < delta)
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.
266 static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
270 struct kvm_vcpu *vcpu;
272 unsigned long long *delta = v;
274 list_for_each_entry(kvm, &vm_list, vm_list) {
275 kvm_for_each_vcpu(i, vcpu, kvm) {
276 kvm_clock_sync_scb(vcpu->arch.sie_block, *delta);
278 kvm->arch.epoch = vcpu->arch.sie_block->epoch;
279 kvm->arch.epdx = vcpu->arch.sie_block->epdx;
281 if (vcpu->arch.cputm_enabled)
282 vcpu->arch.cputm_start += *delta;
283 if (vcpu->arch.vsie_block)
284 kvm_clock_sync_scb(vcpu->arch.vsie_block,
291 static struct notifier_block kvm_clock_notifier = {
292 .notifier_call = kvm_clock_sync,
295 int kvm_arch_hardware_setup(void)
297 gmap_notifier.notifier_call = kvm_gmap_notifier;
298 gmap_register_pte_notifier(&gmap_notifier);
299 vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier;
300 gmap_register_pte_notifier(&vsie_gmap_notifier);
301 atomic_notifier_chain_register(&s390_epoch_delta_notifier,
302 &kvm_clock_notifier);
306 void kvm_arch_hardware_unsetup(void)
308 gmap_unregister_pte_notifier(&gmap_notifier);
309 gmap_unregister_pte_notifier(&vsie_gmap_notifier);
310 atomic_notifier_chain_unregister(&s390_epoch_delta_notifier,
311 &kvm_clock_notifier);
314 static void allow_cpu_feat(unsigned long nr)
316 set_bit_inv(nr, kvm_s390_available_cpu_feat);
319 static inline int plo_test_bit(unsigned char nr)
321 register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
325 /* Parameter registers are ignored for "test bit" */
335 static __always_inline void __insn32_query(unsigned int opcode, u8 *query)
337 register unsigned long r0 asm("0") = 0; /* query function */
338 register unsigned long r1 asm("1") = (unsigned long) query;
341 /* Parameter regs are ignored */
342 " .insn rrf,%[opc] << 16,2,4,6,0\n"
344 : "d" (r0), "a" (r1), [opc] "i" (opcode)
348 #define INSN_SORTL 0xb938
349 #define INSN_DFLTCC 0xb939
351 static void kvm_s390_cpu_feat_init(void)
355 for (i = 0; i < 256; ++i) {
357 kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7);
360 if (test_facility(28)) /* TOD-clock steering */
361 ptff(kvm_s390_available_subfunc.ptff,
362 sizeof(kvm_s390_available_subfunc.ptff),
365 if (test_facility(17)) { /* MSA */
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);
377 if (test_facility(76)) /* MSA3 */
378 __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *)
379 kvm_s390_available_subfunc.pckmo);
380 if (test_facility(77)) { /* MSA4 */
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);
390 if (test_facility(57)) /* MSA5 */
391 __cpacf_query(CPACF_PRNO, (cpacf_mask_t *)
392 kvm_s390_available_subfunc.ppno);
394 if (test_facility(146)) /* MSA8 */
395 __cpacf_query(CPACF_KMA, (cpacf_mask_t *)
396 kvm_s390_available_subfunc.kma);
398 if (test_facility(155)) /* MSA9 */
399 __cpacf_query(CPACF_KDSA, (cpacf_mask_t *)
400 kvm_s390_available_subfunc.kdsa);
402 if (test_facility(150)) /* SORTL */
403 __insn32_query(INSN_SORTL, kvm_s390_available_subfunc.sortl);
405 if (test_facility(151)) /* DFLTCC */
406 __insn32_query(INSN_DFLTCC, kvm_s390_available_subfunc.dfltcc);
408 if (MACHINE_HAS_ESOP)
409 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
411 * We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
412 * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
414 if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
415 !test_facility(3) || !nested)
417 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
418 if (sclp.has_64bscao)
419 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
421 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
423 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE);
425 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
427 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
429 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
431 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
433 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS);
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.
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.
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.
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.
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.
454 int kvm_arch_init(void *opaque)
458 kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
462 if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
464 goto out_debug_unreg;
467 kvm_s390_cpu_feat_init();
469 /* Register floating interrupt controller interface. */
470 rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
472 pr_err("A FLIC registration call failed with rc=%d\n", rc);
473 goto out_debug_unreg;
476 rc = kvm_s390_gib_init(GAL_ISC);
478 goto out_gib_destroy;
483 kvm_s390_gib_destroy();
485 debug_unregister(kvm_s390_dbf);
489 void kvm_arch_exit(void)
491 kvm_s390_gib_destroy();
492 debug_unregister(kvm_s390_dbf);
495 /* Section: device related */
496 long kvm_arch_dev_ioctl(struct file *filp,
497 unsigned int ioctl, unsigned long arg)
499 if (ioctl == KVM_S390_ENABLE_SIE)
500 return s390_enable_sie();
504 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
509 case KVM_CAP_S390_PSW:
510 case KVM_CAP_S390_GMAP:
511 case KVM_CAP_SYNC_MMU:
512 #ifdef CONFIG_KVM_S390_UCONTROL
513 case KVM_CAP_S390_UCONTROL:
515 case KVM_CAP_ASYNC_PF:
516 case KVM_CAP_SYNC_REGS:
517 case KVM_CAP_ONE_REG:
518 case KVM_CAP_ENABLE_CAP:
519 case KVM_CAP_S390_CSS_SUPPORT:
520 case KVM_CAP_IOEVENTFD:
521 case KVM_CAP_DEVICE_CTRL:
522 case KVM_CAP_S390_IRQCHIP:
523 case KVM_CAP_VM_ATTRIBUTES:
524 case KVM_CAP_MP_STATE:
525 case KVM_CAP_IMMEDIATE_EXIT:
526 case KVM_CAP_S390_INJECT_IRQ:
527 case KVM_CAP_S390_USER_SIGP:
528 case KVM_CAP_S390_USER_STSI:
529 case KVM_CAP_S390_SKEYS:
530 case KVM_CAP_S390_IRQ_STATE:
531 case KVM_CAP_S390_USER_INSTR0:
532 case KVM_CAP_S390_CMMA_MIGRATION:
533 case KVM_CAP_S390_AIS:
534 case KVM_CAP_S390_AIS_MIGRATION:
537 case KVM_CAP_S390_HPAGE_1M:
539 if (hpage && !kvm_is_ucontrol(kvm))
542 case KVM_CAP_S390_MEM_OP:
545 case KVM_CAP_NR_VCPUS:
546 case KVM_CAP_MAX_VCPUS:
547 case KVM_CAP_MAX_VCPU_ID:
548 r = KVM_S390_BSCA_CPU_SLOTS;
549 if (!kvm_s390_use_sca_entries())
551 else if (sclp.has_esca && sclp.has_64bscao)
552 r = KVM_S390_ESCA_CPU_SLOTS;
554 case KVM_CAP_S390_COW:
555 r = MACHINE_HAS_ESOP;
557 case KVM_CAP_S390_VECTOR_REGISTERS:
560 case KVM_CAP_S390_RI:
561 r = test_facility(64);
563 case KVM_CAP_S390_GS:
564 r = test_facility(133);
566 case KVM_CAP_S390_BPB:
567 r = test_facility(82);
575 static void kvm_s390_sync_dirty_log(struct kvm *kvm,
576 struct kvm_memory_slot *memslot)
579 gfn_t cur_gfn, last_gfn;
580 unsigned long gaddr, vmaddr;
581 struct gmap *gmap = kvm->arch.gmap;
582 DECLARE_BITMAP(bitmap, _PAGE_ENTRIES);
584 /* Loop over all guest segments */
585 cur_gfn = memslot->base_gfn;
586 last_gfn = memslot->base_gfn + memslot->npages;
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))
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);
600 if (fatal_signal_pending(current))
606 /* Section: vm related */
607 static void sca_del_vcpu(struct kvm_vcpu *vcpu);
610 * Get (and clear) the dirty memory log for a memory slot.
612 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
613 struct kvm_dirty_log *log)
617 struct kvm_memslots *slots;
618 struct kvm_memory_slot *memslot;
621 if (kvm_is_ucontrol(kvm))
624 mutex_lock(&kvm->slots_lock);
627 if (log->slot >= KVM_USER_MEM_SLOTS)
630 slots = kvm_memslots(kvm);
631 memslot = id_to_memslot(slots, log->slot);
633 if (!memslot->dirty_bitmap)
636 kvm_s390_sync_dirty_log(kvm, memslot);
637 r = kvm_get_dirty_log(kvm, log, &is_dirty);
641 /* Clear the dirty log */
643 n = kvm_dirty_bitmap_bytes(memslot);
644 memset(memslot->dirty_bitmap, 0, n);
648 mutex_unlock(&kvm->slots_lock);
652 static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
655 struct kvm_vcpu *vcpu;
657 kvm_for_each_vcpu(i, vcpu, kvm) {
658 kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu);
662 int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
670 case KVM_CAP_S390_IRQCHIP:
671 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
672 kvm->arch.use_irqchip = 1;
675 case KVM_CAP_S390_USER_SIGP:
676 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
677 kvm->arch.user_sigp = 1;
680 case KVM_CAP_S390_VECTOR_REGISTERS:
681 mutex_lock(&kvm->lock);
682 if (kvm->created_vcpus) {
684 } else if (MACHINE_HAS_VX) {
685 set_kvm_facility(kvm->arch.model.fac_mask, 129);
686 set_kvm_facility(kvm->arch.model.fac_list, 129);
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);
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);
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);
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);
706 mutex_unlock(&kvm->lock);
707 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
708 r ? "(not available)" : "(success)");
710 case KVM_CAP_S390_RI:
712 mutex_lock(&kvm->lock);
713 if (kvm->created_vcpus) {
715 } else if (test_facility(64)) {
716 set_kvm_facility(kvm->arch.model.fac_mask, 64);
717 set_kvm_facility(kvm->arch.model.fac_list, 64);
720 mutex_unlock(&kvm->lock);
721 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
722 r ? "(not available)" : "(success)");
724 case KVM_CAP_S390_AIS:
725 mutex_lock(&kvm->lock);
726 if (kvm->created_vcpus) {
729 set_kvm_facility(kvm->arch.model.fac_mask, 72);
730 set_kvm_facility(kvm->arch.model.fac_list, 72);
733 mutex_unlock(&kvm->lock);
734 VM_EVENT(kvm, 3, "ENABLE: AIS %s",
735 r ? "(not available)" : "(success)");
737 case KVM_CAP_S390_GS:
739 mutex_lock(&kvm->lock);
740 if (kvm->created_vcpus) {
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);
747 mutex_unlock(&kvm->lock);
748 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s",
749 r ? "(not available)" : "(success)");
751 case KVM_CAP_S390_HPAGE_1M:
752 mutex_lock(&kvm->lock);
753 if (kvm->created_vcpus)
755 else if (!hpage || kvm->arch.use_cmma || kvm_is_ucontrol(kvm))
759 down_write(&kvm->mm->mmap_sem);
760 kvm->mm->context.allow_gmap_hpage_1m = 1;
761 up_write(&kvm->mm->mmap_sem);
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.
767 kvm->arch.use_skf = 0;
768 kvm->arch.use_pfmfi = 0;
770 mutex_unlock(&kvm->lock);
771 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_HPAGE %s",
772 r ? "(not available)" : "(success)");
774 case KVM_CAP_S390_USER_STSI:
775 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
776 kvm->arch.user_stsi = 1;
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);
792 static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
796 switch (attr->attr) {
797 case KVM_S390_VM_MEM_LIMIT_SIZE:
799 VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
800 kvm->arch.mem_limit);
801 if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
811 static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
815 switch (attr->attr) {
816 case KVM_S390_VM_MEM_ENABLE_CMMA:
821 VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
822 mutex_lock(&kvm->lock);
823 if (kvm->created_vcpus)
825 else if (kvm->mm->context.allow_gmap_hpage_1m)
828 kvm->arch.use_cmma = 1;
829 /* Not compatible with cmma. */
830 kvm->arch.use_pfmfi = 0;
833 mutex_unlock(&kvm->lock);
835 case KVM_S390_VM_MEM_CLR_CMMA:
840 if (!kvm->arch.use_cmma)
843 VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
844 mutex_lock(&kvm->lock);
845 idx = srcu_read_lock(&kvm->srcu);
846 s390_reset_cmma(kvm->arch.gmap->mm);
847 srcu_read_unlock(&kvm->srcu, idx);
848 mutex_unlock(&kvm->lock);
851 case KVM_S390_VM_MEM_LIMIT_SIZE: {
852 unsigned long new_limit;
854 if (kvm_is_ucontrol(kvm))
857 if (get_user(new_limit, (u64 __user *)attr->addr))
860 if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
861 new_limit > kvm->arch.mem_limit)
867 /* gmap_create takes last usable address */
868 if (new_limit != KVM_S390_NO_MEM_LIMIT)
872 mutex_lock(&kvm->lock);
873 if (!kvm->created_vcpus) {
874 /* gmap_create will round the limit up */
875 struct gmap *new = gmap_create(current->mm, new_limit);
880 gmap_remove(kvm->arch.gmap);
882 kvm->arch.gmap = new;
886 mutex_unlock(&kvm->lock);
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);
899 static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);
901 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm)
903 struct kvm_vcpu *vcpu;
906 kvm_s390_vcpu_block_all(kvm);
908 kvm_for_each_vcpu(i, vcpu, kvm) {
909 kvm_s390_vcpu_crypto_setup(vcpu);
910 /* recreate the shadow crycb by leaving the VSIE handler */
911 kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu);
914 kvm_s390_vcpu_unblock_all(kvm);
917 static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
919 mutex_lock(&kvm->lock);
920 switch (attr->attr) {
921 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
922 if (!test_kvm_facility(kvm, 76)) {
923 mutex_unlock(&kvm->lock);
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;
930 VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
932 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
933 if (!test_kvm_facility(kvm, 76)) {
934 mutex_unlock(&kvm->lock);
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;
941 VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
943 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
944 if (!test_kvm_facility(kvm, 76)) {
945 mutex_unlock(&kvm->lock);
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));
951 VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
953 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
954 if (!test_kvm_facility(kvm, 76)) {
955 mutex_unlock(&kvm->lock);
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));
961 VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
963 case KVM_S390_VM_CRYPTO_ENABLE_APIE:
964 if (!ap_instructions_available()) {
965 mutex_unlock(&kvm->lock);
968 kvm->arch.crypto.apie = 1;
970 case KVM_S390_VM_CRYPTO_DISABLE_APIE:
971 if (!ap_instructions_available()) {
972 mutex_unlock(&kvm->lock);
975 kvm->arch.crypto.apie = 0;
978 mutex_unlock(&kvm->lock);
982 kvm_s390_vcpu_crypto_reset_all(kvm);
983 mutex_unlock(&kvm->lock);
987 static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req)
990 struct kvm_vcpu *vcpu;
992 kvm_for_each_vcpu(cx, vcpu, kvm)
993 kvm_s390_sync_request(req, vcpu);
997 * Must be called with kvm->srcu held to avoid races on memslots, and with
998 * kvm->slots_lock to avoid races with ourselves and kvm_s390_vm_stop_migration.
1000 static int kvm_s390_vm_start_migration(struct kvm *kvm)
1002 struct kvm_memory_slot *ms;
1003 struct kvm_memslots *slots;
1004 unsigned long ram_pages = 0;
1007 /* migration mode already enabled */
1008 if (kvm->arch.migration_mode)
1010 slots = kvm_memslots(kvm);
1011 if (!slots || !slots->used_slots)
1014 if (!kvm->arch.use_cmma) {
1015 kvm->arch.migration_mode = 1;
1018 /* mark all the pages in active slots as dirty */
1019 for (slotnr = 0; slotnr < slots->used_slots; slotnr++) {
1020 ms = slots->memslots + slotnr;
1021 if (!ms->dirty_bitmap)
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
1029 memset(kvm_second_dirty_bitmap(ms), 0xff, kvm_dirty_bitmap_bytes(ms));
1030 ram_pages += ms->npages;
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);
1039 * Must be called with kvm->slots_lock to avoid races with ourselves and
1040 * kvm_s390_vm_start_migration.
1042 static int kvm_s390_vm_stop_migration(struct kvm *kvm)
1044 /* migration mode already disabled */
1045 if (!kvm->arch.migration_mode)
1047 kvm->arch.migration_mode = 0;
1048 if (kvm->arch.use_cmma)
1049 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION);
1053 static int kvm_s390_vm_set_migration(struct kvm *kvm,
1054 struct kvm_device_attr *attr)
1058 mutex_lock(&kvm->slots_lock);
1059 switch (attr->attr) {
1060 case KVM_S390_VM_MIGRATION_START:
1061 res = kvm_s390_vm_start_migration(kvm);
1063 case KVM_S390_VM_MIGRATION_STOP:
1064 res = kvm_s390_vm_stop_migration(kvm);
1069 mutex_unlock(&kvm->slots_lock);
1074 static int kvm_s390_vm_get_migration(struct kvm *kvm,
1075 struct kvm_device_attr *attr)
1077 u64 mig = kvm->arch.migration_mode;
1079 if (attr->attr != KVM_S390_VM_MIGRATION_STATUS)
1082 if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig)))
1087 static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
1089 struct kvm_s390_vm_tod_clock gtod;
1091 if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod)))
1094 if (!test_kvm_facility(kvm, 139) && gtod.epoch_idx)
1096 kvm_s390_set_tod_clock(kvm, >od);
1098 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx",
1099 gtod.epoch_idx, gtod.tod);
1104 static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
1108 if (copy_from_user(>od_high, (void __user *)attr->addr,
1114 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
1119 static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
1121 struct kvm_s390_vm_tod_clock gtod = { 0 };
1123 if (copy_from_user(>od.tod, (void __user *)attr->addr,
1127 kvm_s390_set_tod_clock(kvm, >od);
1128 VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod.tod);
1132 static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
1139 switch (attr->attr) {
1140 case KVM_S390_VM_TOD_EXT:
1141 ret = kvm_s390_set_tod_ext(kvm, attr);
1143 case KVM_S390_VM_TOD_HIGH:
1144 ret = kvm_s390_set_tod_high(kvm, attr);
1146 case KVM_S390_VM_TOD_LOW:
1147 ret = kvm_s390_set_tod_low(kvm, attr);
1156 static void kvm_s390_get_tod_clock(struct kvm *kvm,
1157 struct kvm_s390_vm_tod_clock *gtod)
1159 struct kvm_s390_tod_clock_ext htod;
1163 get_tod_clock_ext((char *)&htod);
1165 gtod->tod = htod.tod + kvm->arch.epoch;
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;
1176 static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
1178 struct kvm_s390_vm_tod_clock gtod;
1180 memset(>od, 0, sizeof(gtod));
1181 kvm_s390_get_tod_clock(kvm, >od);
1182 if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
1185 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x, TOD base: 0x%llx",
1186 gtod.epoch_idx, gtod.tod);
1190 static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
1194 if (copy_to_user((void __user *)attr->addr, >od_high,
1197 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
1202 static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
1206 gtod = kvm_s390_get_tod_clock_fast(kvm);
1207 if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
1209 VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
1214 static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
1221 switch (attr->attr) {
1222 case KVM_S390_VM_TOD_EXT:
1223 ret = kvm_s390_get_tod_ext(kvm, attr);
1225 case KVM_S390_VM_TOD_HIGH:
1226 ret = kvm_s390_get_tod_high(kvm, attr);
1228 case KVM_S390_VM_TOD_LOW:
1229 ret = kvm_s390_get_tod_low(kvm, attr);
1238 static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
1240 struct kvm_s390_vm_cpu_processor *proc;
1241 u16 lowest_ibc, unblocked_ibc;
1244 mutex_lock(&kvm->lock);
1245 if (kvm->created_vcpus) {
1249 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
1254 if (!copy_from_user(proc, (void __user *)attr->addr,
1256 kvm->arch.model.cpuid = proc->cpuid;
1257 lowest_ibc = sclp.ibc >> 16 & 0xfff;
1258 unblocked_ibc = sclp.ibc & 0xfff;
1259 if (lowest_ibc && proc->ibc) {
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;
1265 kvm->arch.model.ibc = proc->ibc;
1267 memcpy(kvm->arch.model.fac_list, proc->fac_list,
1268 S390_ARCH_FAC_LIST_SIZE_BYTE);
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]);
1280 mutex_unlock(&kvm->lock);
1284 static int kvm_s390_set_processor_feat(struct kvm *kvm,
1285 struct kvm_device_attr *attr)
1287 struct kvm_s390_vm_cpu_feat data;
1289 if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
1291 if (!bitmap_subset((unsigned long *) data.feat,
1292 kvm_s390_available_cpu_feat,
1293 KVM_S390_VM_CPU_FEAT_NR_BITS))
1296 mutex_lock(&kvm->lock);
1297 if (kvm->created_vcpus) {
1298 mutex_unlock(&kvm->lock);
1301 bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
1302 KVM_S390_VM_CPU_FEAT_NR_BITS);
1303 mutex_unlock(&kvm->lock);
1304 VM_EVENT(kvm, 3, "SET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1311 static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
1312 struct kvm_device_attr *attr)
1314 mutex_lock(&kvm->lock);
1315 if (kvm->created_vcpus) {
1316 mutex_unlock(&kvm->lock);
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);
1325 mutex_unlock(&kvm->lock);
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]);
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]);
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]);
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]);
1388 static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1392 switch (attr->attr) {
1393 case KVM_S390_VM_CPU_PROCESSOR:
1394 ret = kvm_s390_set_processor(kvm, attr);
1396 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1397 ret = kvm_s390_set_processor_feat(kvm, attr);
1399 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1400 ret = kvm_s390_set_processor_subfunc(kvm, attr);
1406 static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
1408 struct kvm_s390_vm_cpu_processor *proc;
1411 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
1416 proc->cpuid = kvm->arch.model.cpuid;
1417 proc->ibc = kvm->arch.model.ibc;
1418 memcpy(&proc->fac_list, kvm->arch.model.fac_list,
1419 S390_ARCH_FAC_LIST_SIZE_BYTE);
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]);
1427 if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
1434 static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
1436 struct kvm_s390_vm_cpu_machine *mach;
1439 mach = kzalloc(sizeof(*mach), GFP_KERNEL);
1444 get_cpu_id((struct cpuid *) &mach->cpuid);
1445 mach->ibc = sclp.ibc;
1446 memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
1447 S390_ARCH_FAC_LIST_SIZE_BYTE);
1448 memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
1449 sizeof(S390_lowcore.stfle_fac_list));
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",
1457 VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1461 if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
1468 static int kvm_s390_get_processor_feat(struct kvm *kvm,
1469 struct kvm_device_attr *attr)
1471 struct kvm_s390_vm_cpu_feat data;
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)))
1477 VM_EVENT(kvm, 3, "GET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1484 static int kvm_s390_get_machine_feat(struct kvm *kvm,
1485 struct kvm_device_attr *attr)
1487 struct kvm_s390_vm_cpu_feat data;
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)))
1494 VM_EVENT(kvm, 3, "GET: host feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1501 static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
1502 struct kvm_device_attr *attr)
1504 if (copy_to_user((void __user *)attr->addr, &kvm->arch.model.subfuncs,
1505 sizeof(struct kvm_s390_vm_cpu_subfunc)))
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]);
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]);
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]);
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]);
1569 static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
1570 struct kvm_device_attr *attr)
1572 if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
1573 sizeof(struct kvm_s390_vm_cpu_subfunc)))
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]);
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]);
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]);
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]);
1637 static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1641 switch (attr->attr) {
1642 case KVM_S390_VM_CPU_PROCESSOR:
1643 ret = kvm_s390_get_processor(kvm, attr);
1645 case KVM_S390_VM_CPU_MACHINE:
1646 ret = kvm_s390_get_machine(kvm, attr);
1648 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1649 ret = kvm_s390_get_processor_feat(kvm, attr);
1651 case KVM_S390_VM_CPU_MACHINE_FEAT:
1652 ret = kvm_s390_get_machine_feat(kvm, attr);
1654 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1655 ret = kvm_s390_get_processor_subfunc(kvm, attr);
1657 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
1658 ret = kvm_s390_get_machine_subfunc(kvm, attr);
1664 static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1668 switch (attr->group) {
1669 case KVM_S390_VM_MEM_CTRL:
1670 ret = kvm_s390_set_mem_control(kvm, attr);
1672 case KVM_S390_VM_TOD:
1673 ret = kvm_s390_set_tod(kvm, attr);
1675 case KVM_S390_VM_CPU_MODEL:
1676 ret = kvm_s390_set_cpu_model(kvm, attr);
1678 case KVM_S390_VM_CRYPTO:
1679 ret = kvm_s390_vm_set_crypto(kvm, attr);
1681 case KVM_S390_VM_MIGRATION:
1682 ret = kvm_s390_vm_set_migration(kvm, attr);
1692 static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1696 switch (attr->group) {
1697 case KVM_S390_VM_MEM_CTRL:
1698 ret = kvm_s390_get_mem_control(kvm, attr);
1700 case KVM_S390_VM_TOD:
1701 ret = kvm_s390_get_tod(kvm, attr);
1703 case KVM_S390_VM_CPU_MODEL:
1704 ret = kvm_s390_get_cpu_model(kvm, attr);
1706 case KVM_S390_VM_MIGRATION:
1707 ret = kvm_s390_vm_get_migration(kvm, attr);
1717 static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1721 switch (attr->group) {
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:
1726 ret = sclp.has_cmma ? 0 : -ENXIO;
1728 case KVM_S390_VM_MEM_LIMIT_SIZE:
1736 case KVM_S390_VM_TOD:
1737 switch (attr->attr) {
1738 case KVM_S390_VM_TOD_LOW:
1739 case KVM_S390_VM_TOD_HIGH:
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:
1751 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1752 case KVM_S390_VM_CPU_MACHINE_FEAT:
1753 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
1754 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
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:
1770 case KVM_S390_VM_CRYPTO_ENABLE_APIE:
1771 case KVM_S390_VM_CRYPTO_DISABLE_APIE:
1772 ret = ap_instructions_available() ? 0 : -ENXIO;
1779 case KVM_S390_VM_MIGRATION:
1790 static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1794 int srcu_idx, i, r = 0;
1796 if (args->flags != 0)
1799 /* Is this guest using storage keys? */
1800 if (!mm_uses_skeys(current->mm))
1801 return KVM_S390_GET_SKEYS_NONE;
1803 /* Enforce sane limit on memory allocation */
1804 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1807 keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
1811 down_read(¤t->mm->mmap_sem);
1812 srcu_idx = srcu_read_lock(&kvm->srcu);
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)) {
1820 r = get_guest_storage_key(current->mm, hva, &keys[i]);
1824 srcu_read_unlock(&kvm->srcu, srcu_idx);
1825 up_read(¤t->mm->mmap_sem);
1828 r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
1829 sizeof(uint8_t) * args->count);
1838 static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1842 int srcu_idx, i, r = 0;
1845 if (args->flags != 0)
1848 /* Enforce sane limit on memory allocation */
1849 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1852 keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
1856 r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
1857 sizeof(uint8_t) * args->count);
1863 /* Enable storage key handling for the guest */
1864 r = s390_enable_skey();
1869 down_read(¤t->mm->mmap_sem);
1870 srcu_idx = srcu_read_lock(&kvm->srcu);
1871 while (i < args->count) {
1873 hva = gfn_to_hva(kvm, args->start_gfn + i);
1874 if (kvm_is_error_hva(hva)) {
1879 /* Lowest order bit is reserved */
1880 if (keys[i] & 0x01) {
1885 r = set_guest_storage_key(current->mm, hva, keys[i], 0);
1887 r = fixup_user_fault(current, current->mm, hva,
1888 FAULT_FLAG_WRITE, &unlocked);
1895 srcu_read_unlock(&kvm->srcu, srcu_idx);
1896 up_read(¤t->mm->mmap_sem);
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
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)
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.
1916 static int gfn_to_memslot_approx(struct kvm_memslots *slots, gfn_t gfn)
1918 int start = 0, end = slots->used_slots;
1919 int slot = atomic_read(&slots->lru_slot);
1920 struct kvm_memory_slot *memslots = slots->memslots;
1922 if (gfn >= memslots[slot].base_gfn &&
1923 gfn < memslots[slot].base_gfn + memslots[slot].npages)
1926 while (start < end) {
1927 slot = start + (end - start) / 2;
1929 if (gfn >= memslots[slot].base_gfn)
1935 if (gfn >= memslots[start].base_gfn &&
1936 gfn < memslots[start].base_gfn + memslots[start].npages) {
1937 atomic_set(&slots->lru_slot, start);
1943 static int kvm_s390_peek_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1944 u8 *res, unsigned long bufsize)
1946 unsigned long pgstev, hva, cur_gfn = args->start_gfn;
1949 while (args->count < bufsize) {
1950 hva = gfn_to_hva(kvm, cur_gfn);
1952 * We return an error if the first value was invalid, but we
1953 * return successfully if at least one value was copied.
1955 if (kvm_is_error_hva(hva))
1956 return args->count ? 0 : -EFAULT;
1957 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
1959 res[args->count++] = (pgstev >> 24) & 0x43;
1966 static unsigned long kvm_s390_next_dirty_cmma(struct kvm_memslots *slots,
1967 unsigned long cur_gfn)
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;
1973 if (ms->base_gfn + ms->npages <= cur_gfn) {
1975 /* If we are above the highest slot, wrap around */
1977 slotidx = slots->used_slots - 1;
1979 ms = slots->memslots + slotidx;
1982 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, ofs);
1983 while ((slotidx > 0) && (ofs >= ms->npages)) {
1985 ms = slots->memslots + slotidx;
1986 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, 0);
1988 return ms->base_gfn + ofs;
1991 static int kvm_s390_get_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1992 u8 *res, unsigned long bufsize)
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;
1998 cur_gfn = kvm_s390_next_dirty_cmma(slots, args->start_gfn);
1999 ms = gfn_to_memslot(kvm, cur_gfn);
2001 args->start_gfn = cur_gfn;
2004 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2005 mem_end = slots->memslots[0].base_gfn + slots->memslots[0].npages;
2007 while (args->count < bufsize) {
2008 hva = gfn_to_hva(kvm, cur_gfn);
2009 if (kvm_is_error_hva(hva))
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)
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)
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))
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);
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.
2047 static int kvm_s390_get_cmma_bits(struct kvm *kvm,
2048 struct kvm_s390_cmma_log *args)
2050 unsigned long bufsize;
2051 int srcu_idx, peek, ret;
2054 if (!kvm->arch.use_cmma)
2056 /* Invalid/unsupported flags were specified */
2057 if (args->flags & ~KVM_S390_CMMA_PEEK)
2059 /* Migration mode query, and we are not doing a migration */
2060 peek = !!(args->flags & KVM_S390_CMMA_PEEK);
2061 if (!peek && !kvm->arch.migration_mode)
2063 /* CMMA is disabled or was not used, or the buffer has length zero */
2064 bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX);
2065 if (!bufsize || !kvm->mm->context.uses_cmm) {
2066 memset(args, 0, sizeof(*args));
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));
2075 values = vmalloc(bufsize);
2079 down_read(&kvm->mm->mmap_sem);
2080 srcu_idx = srcu_read_lock(&kvm->srcu);
2082 ret = kvm_s390_peek_cmma(kvm, args, values, bufsize);
2084 ret = kvm_s390_get_cmma(kvm, args, values, bufsize);
2085 srcu_read_unlock(&kvm->srcu, srcu_idx);
2086 up_read(&kvm->mm->mmap_sem);
2088 if (kvm->arch.migration_mode)
2089 args->remaining = atomic64_read(&kvm->arch.cmma_dirty_pages);
2091 args->remaining = 0;
2093 if (copy_to_user((void __user *)args->values, values, args->count))
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
2103 * set and the mm->context.uses_cmm flag is set.
2105 static int kvm_s390_set_cmma_bits(struct kvm *kvm,
2106 const struct kvm_s390_cmma_log *args)
2108 unsigned long hva, mask, pgstev, i;
2110 int srcu_idx, r = 0;
2114 if (!kvm->arch.use_cmma)
2116 /* invalid/unsupported flags */
2117 if (args->flags != 0)
2119 /* Enforce sane limit on memory allocation */
2120 if (args->count > KVM_S390_CMMA_SIZE_MAX)
2123 if (args->count == 0)
2126 bits = vmalloc(array_size(sizeof(*bits), args->count));
2130 r = copy_from_user(bits, (void __user *)args->values, args->count);
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)) {
2146 pgstev = pgstev << 24;
2147 mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT;
2148 set_pgste_bits(kvm->mm, hva, mask, pgstev);
2150 srcu_read_unlock(&kvm->srcu, srcu_idx);
2151 up_read(&kvm->mm->mmap_sem);
2153 if (!kvm->mm->context.uses_cmm) {
2154 down_write(&kvm->mm->mmap_sem);
2155 kvm->mm->context.uses_cmm = 1;
2156 up_write(&kvm->mm->mmap_sem);
2163 long kvm_arch_vm_ioctl(struct file *filp,
2164 unsigned int ioctl, unsigned long arg)
2166 struct kvm *kvm = filp->private_data;
2167 void __user *argp = (void __user *)arg;
2168 struct kvm_device_attr attr;
2172 case KVM_S390_INTERRUPT: {
2173 struct kvm_s390_interrupt s390int;
2176 if (copy_from_user(&s390int, argp, sizeof(s390int)))
2178 r = kvm_s390_inject_vm(kvm, &s390int);
2181 case KVM_CREATE_IRQCHIP: {
2182 struct kvm_irq_routing_entry routing;
2185 if (kvm->arch.use_irqchip) {
2186 /* Set up dummy routing. */
2187 memset(&routing, 0, sizeof(routing));
2188 r = kvm_set_irq_routing(kvm, &routing, 0, 0);
2192 case KVM_SET_DEVICE_ATTR: {
2194 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2196 r = kvm_s390_vm_set_attr(kvm, &attr);
2199 case KVM_GET_DEVICE_ATTR: {
2201 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2203 r = kvm_s390_vm_get_attr(kvm, &attr);
2206 case KVM_HAS_DEVICE_ATTR: {
2208 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2210 r = kvm_s390_vm_has_attr(kvm, &attr);
2213 case KVM_S390_GET_SKEYS: {
2214 struct kvm_s390_skeys args;
2217 if (copy_from_user(&args, argp,
2218 sizeof(struct kvm_s390_skeys)))
2220 r = kvm_s390_get_skeys(kvm, &args);
2223 case KVM_S390_SET_SKEYS: {
2224 struct kvm_s390_skeys args;
2227 if (copy_from_user(&args, argp,
2228 sizeof(struct kvm_s390_skeys)))
2230 r = kvm_s390_set_skeys(kvm, &args);
2233 case KVM_S390_GET_CMMA_BITS: {
2234 struct kvm_s390_cmma_log args;
2237 if (copy_from_user(&args, argp, sizeof(args)))
2239 mutex_lock(&kvm->slots_lock);
2240 r = kvm_s390_get_cmma_bits(kvm, &args);
2241 mutex_unlock(&kvm->slots_lock);
2243 r = copy_to_user(argp, &args, sizeof(args));
2249 case KVM_S390_SET_CMMA_BITS: {
2250 struct kvm_s390_cmma_log args;
2253 if (copy_from_user(&args, argp, sizeof(args)))
2255 mutex_lock(&kvm->slots_lock);
2256 r = kvm_s390_set_cmma_bits(kvm, &args);
2257 mutex_unlock(&kvm->slots_lock);
2267 static int kvm_s390_apxa_installed(void)
2269 struct ap_config_info info;
2271 if (ap_instructions_available()) {
2272 if (ap_qci(&info) == 0)
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
2287 static void kvm_s390_set_crycb_format(struct kvm *kvm)
2289 kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
2291 /* Clear the CRYCB format bits - i.e., set format 0 by default */
2292 kvm->arch.crypto.crycbd &= ~(CRYCB_FORMAT_MASK);
2294 /* Check whether MSAX3 is installed */
2295 if (!test_kvm_facility(kvm, 76))
2298 if (kvm_s390_apxa_installed())
2299 kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
2301 kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
2304 void kvm_arch_crypto_set_masks(struct kvm *kvm, unsigned long *apm,
2305 unsigned long *aqm, unsigned long *adm)
2307 struct kvm_s390_crypto_cb *crycb = kvm->arch.crypto.crycb;
2309 mutex_lock(&kvm->lock);
2310 kvm_s390_vcpu_block_all(kvm);
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]);
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));
2333 default: /* Can not happen */
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);
2342 EXPORT_SYMBOL_GPL(kvm_arch_crypto_set_masks);
2344 void kvm_arch_crypto_clear_masks(struct kvm *kvm)
2346 mutex_lock(&kvm->lock);
2347 kvm_s390_vcpu_block_all(kvm);
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));
2354 VM_EVENT(kvm, 3, "%s", "CLR CRYCB:");
2355 /* recreate the shadow crycb for each vcpu */
2356 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
2357 kvm_s390_vcpu_unblock_all(kvm);
2358 mutex_unlock(&kvm->lock);
2360 EXPORT_SYMBOL_GPL(kvm_arch_crypto_clear_masks);
2362 static u64 kvm_s390_get_initial_cpuid(void)
2367 cpuid.version = 0xff;
2368 return *((u64 *) &cpuid);
2371 static void kvm_s390_crypto_init(struct kvm *kvm)
2373 kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
2374 kvm_s390_set_crycb_format(kvm);
2376 if (!test_kvm_facility(kvm, 76))
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));
2388 static void sca_dispose(struct kvm *kvm)
2390 if (kvm->arch.use_esca)
2391 free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
2393 free_page((unsigned long)(kvm->arch.sca));
2394 kvm->arch.sca = NULL;
2397 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
2399 gfp_t alloc_flags = GFP_KERNEL;
2401 char debug_name[16];
2402 static unsigned long sca_offset;
2405 #ifdef CONFIG_KVM_S390_UCONTROL
2406 if (type & ~KVM_VM_S390_UCONTROL)
2408 if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
2415 rc = s390_enable_sie();
2421 if (!sclp.has_64bscao)
2422 alloc_flags |= GFP_DMA;
2423 rwlock_init(&kvm->arch.sca_lock);
2424 /* start with basic SCA */
2425 kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
2428 mutex_lock(&kvm_lock);
2430 if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
2432 kvm->arch.sca = (struct bsca_block *)
2433 ((char *) kvm->arch.sca + sca_offset);
2434 mutex_unlock(&kvm_lock);
2436 sprintf(debug_name, "kvm-%u", current->pid);
2438 kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
2442 BUILD_BUG_ON(sizeof(struct sie_page2) != 4096);
2443 kvm->arch.sie_page2 =
2444 (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2445 if (!kvm->arch.sie_page2)
2448 kvm->arch.sie_page2->kvm = kvm;
2449 kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
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];
2458 kvm->arch.model.subfuncs = kvm_s390_available_subfunc;
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 */
2464 set_kvm_facility(kvm->arch.model.fac_mask, 74);
2465 set_kvm_facility(kvm->arch.model.fac_list, 74);
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);
2471 if (css_general_characteristics.aiv && test_facility(65))
2472 set_kvm_facility(kvm->arch.model.fac_mask, 65);
2474 kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
2475 kvm->arch.model.ibc = sclp.ibc & 0x0fff;
2477 kvm_s390_crypto_init(kvm);
2479 mutex_init(&kvm->arch.float_int.ais_lock);
2480 spin_lock_init(&kvm->arch.float_int.lock);
2481 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2482 INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
2483 init_waitqueue_head(&kvm->arch.ipte_wq);
2484 mutex_init(&kvm->arch.ipte_mutex);
2486 debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
2487 VM_EVENT(kvm, 3, "vm created with type %lu", type);
2489 if (type & KVM_VM_S390_UCONTROL) {
2490 kvm->arch.gmap = NULL;
2491 kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
2493 if (sclp.hamax == U64_MAX)
2494 kvm->arch.mem_limit = TASK_SIZE_MAX;
2496 kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX,
2498 kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
2499 if (!kvm->arch.gmap)
2501 kvm->arch.gmap->private = kvm;
2502 kvm->arch.gmap->pfault_enabled = 0;
2505 kvm->arch.use_pfmfi = sclp.has_pfmfi;
2506 kvm->arch.use_skf = sclp.has_skey;
2507 spin_lock_init(&kvm->arch.start_stop_lock);
2508 kvm_s390_vsie_init(kvm);
2509 kvm_s390_gisa_init(kvm);
2510 KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
2514 free_page((unsigned long)kvm->arch.sie_page2);
2515 debug_unregister(kvm->arch.dbf);
2517 KVM_EVENT(3, "creation of vm failed: %d", rc);
2521 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
2523 VCPU_EVENT(vcpu, 3, "%s", "free cpu");
2524 trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
2525 kvm_s390_clear_local_irqs(vcpu);
2526 kvm_clear_async_pf_completion_queue(vcpu);
2527 if (!kvm_is_ucontrol(vcpu->kvm))
2530 if (kvm_is_ucontrol(vcpu->kvm))
2531 gmap_remove(vcpu->arch.gmap);
2533 if (vcpu->kvm->arch.use_cmma)
2534 kvm_s390_vcpu_unsetup_cmma(vcpu);
2535 free_page((unsigned long)(vcpu->arch.sie_block));
2537 kvm_vcpu_uninit(vcpu);
2538 kmem_cache_free(kvm_vcpu_cache, vcpu);
2541 static void kvm_free_vcpus(struct kvm *kvm)
2544 struct kvm_vcpu *vcpu;
2546 kvm_for_each_vcpu(i, vcpu, kvm)
2547 kvm_arch_vcpu_destroy(vcpu);
2549 mutex_lock(&kvm->lock);
2550 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
2551 kvm->vcpus[i] = NULL;
2553 atomic_set(&kvm->online_vcpus, 0);
2554 mutex_unlock(&kvm->lock);
2557 void kvm_arch_destroy_vm(struct kvm *kvm)
2559 kvm_free_vcpus(kvm);
2561 debug_unregister(kvm->arch.dbf);
2562 kvm_s390_gisa_destroy(kvm);
2563 free_page((unsigned long)kvm->arch.sie_page2);
2564 if (!kvm_is_ucontrol(kvm))
2565 gmap_remove(kvm->arch.gmap);
2566 kvm_s390_destroy_adapters(kvm);
2567 kvm_s390_clear_float_irqs(kvm);
2568 kvm_s390_vsie_destroy(kvm);
2569 KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
2572 /* Section: vcpu related */
2573 static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
2575 vcpu->arch.gmap = gmap_create(current->mm, -1UL);
2576 if (!vcpu->arch.gmap)
2578 vcpu->arch.gmap->private = vcpu->kvm;
2583 static void sca_del_vcpu(struct kvm_vcpu *vcpu)
2585 if (!kvm_s390_use_sca_entries())
2587 read_lock(&vcpu->kvm->arch.sca_lock);
2588 if (vcpu->kvm->arch.use_esca) {
2589 struct esca_block *sca = vcpu->kvm->arch.sca;
2591 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
2592 sca->cpu[vcpu->vcpu_id].sda = 0;
2594 struct bsca_block *sca = vcpu->kvm->arch.sca;
2596 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
2597 sca->cpu[vcpu->vcpu_id].sda = 0;
2599 read_unlock(&vcpu->kvm->arch.sca_lock);
2602 static void sca_add_vcpu(struct kvm_vcpu *vcpu)
2604 if (!kvm_s390_use_sca_entries()) {
2605 struct bsca_block *sca = vcpu->kvm->arch.sca;
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;
2612 read_lock(&vcpu->kvm->arch.sca_lock);
2613 if (vcpu->kvm->arch.use_esca) {
2614 struct esca_block *sca = vcpu->kvm->arch.sca;
2616 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
2617 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2618 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
2619 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
2620 set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
2622 struct bsca_block *sca = vcpu->kvm->arch.sca;
2624 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
2625 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2626 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
2627 set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
2629 read_unlock(&vcpu->kvm->arch.sca_lock);
2632 /* Basic SCA to Extended SCA data copy routines */
2633 static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
2636 d->sigp_ctrl.c = s->sigp_ctrl.c;
2637 d->sigp_ctrl.scn = s->sigp_ctrl.scn;
2640 static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
2644 d->ipte_control = s->ipte_control;
2646 for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
2647 sca_copy_entry(&d->cpu[i], &s->cpu[i]);
2650 static int sca_switch_to_extended(struct kvm *kvm)
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;
2658 new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
2662 scaoh = (u32)((u64)(new_sca) >> 32);
2663 scaol = (u32)(u64)(new_sca) & ~0x3fU;
2665 kvm_s390_vcpu_block_all(kvm);
2666 write_lock(&kvm->arch.sca_lock);
2668 sca_copy_b_to_e(new_sca, old_sca);
2670 kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
2671 vcpu->arch.sie_block->scaoh = scaoh;
2672 vcpu->arch.sie_block->scaol = scaol;
2673 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
2675 kvm->arch.sca = new_sca;
2676 kvm->arch.use_esca = 1;
2678 write_unlock(&kvm->arch.sca_lock);
2679 kvm_s390_vcpu_unblock_all(kvm);
2681 free_page((unsigned long)old_sca);
2683 VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
2684 old_sca, kvm->arch.sca);
2688 static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
2692 if (!kvm_s390_use_sca_entries()) {
2693 if (id < KVM_MAX_VCPUS)
2697 if (id < KVM_S390_BSCA_CPU_SLOTS)
2699 if (!sclp.has_esca || !sclp.has_64bscao)
2702 mutex_lock(&kvm->lock);
2703 rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
2704 mutex_unlock(&kvm->lock);
2706 return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
2709 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
2711 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
2712 kvm_clear_async_pf_completion_queue(vcpu);
2713 vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
2719 kvm_s390_set_prefix(vcpu, 0);
2720 if (test_kvm_facility(vcpu->kvm, 64))
2721 vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
2722 if (test_kvm_facility(vcpu->kvm, 82))
2723 vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC;
2724 if (test_kvm_facility(vcpu->kvm, 133))
2725 vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
2726 if (test_kvm_facility(vcpu->kvm, 156))
2727 vcpu->run->kvm_valid_regs |= KVM_SYNC_ETOKEN;
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.
2732 vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
2734 vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
2736 if (kvm_is_ucontrol(vcpu->kvm))
2737 return __kvm_ucontrol_vcpu_init(vcpu);
2742 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2743 static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2745 WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
2746 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2747 vcpu->arch.cputm_start = get_tod_clock_fast();
2748 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2751 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2752 static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2754 WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
2755 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2756 vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
2757 vcpu->arch.cputm_start = 0;
2758 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2761 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2762 static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2764 WARN_ON_ONCE(vcpu->arch.cputm_enabled);
2765 vcpu->arch.cputm_enabled = true;
2766 __start_cpu_timer_accounting(vcpu);
2769 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2770 static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2772 WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
2773 __stop_cpu_timer_accounting(vcpu);
2774 vcpu->arch.cputm_enabled = false;
2777 static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2779 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2780 __enable_cpu_timer_accounting(vcpu);
2784 static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2786 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2787 __disable_cpu_timer_accounting(vcpu);
2791 /* set the cpu timer - may only be called from the VCPU thread itself */
2792 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
2794 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2795 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2796 if (vcpu->arch.cputm_enabled)
2797 vcpu->arch.cputm_start = get_tod_clock_fast();
2798 vcpu->arch.sie_block->cputm = cputm;
2799 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2803 /* update and get the cpu timer - can also be called from other VCPU threads */
2804 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
2809 if (unlikely(!vcpu->arch.cputm_enabled))
2810 return vcpu->arch.sie_block->cputm;
2812 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2814 seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
2816 * If the writer would ever execute a read in the critical
2817 * section, e.g. in irq context, we have a deadlock.
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));
2829 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2832 gmap_enable(vcpu->arch.enabled_gmap);
2833 kvm_s390_set_cpuflags(vcpu, CPUSTAT_RUNNING);
2834 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
2835 __start_cpu_timer_accounting(vcpu);
2839 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
2842 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
2843 __stop_cpu_timer_accounting(vcpu);
2844 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING);
2845 vcpu->arch.enabled_gmap = gmap_get_enabled();
2846 gmap_disable(vcpu->arch.enabled_gmap);
2850 static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
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;
2855 kvm_s390_set_prefix(vcpu, 0);
2856 kvm_s390_set_cpu_timer(vcpu, 0);
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));
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 |
2865 CR14_EXTERNAL_DAMAGE_SUBMASK;
2866 /* make sure the new fpc will be lazily loaded */
2868 current->thread.fpu.fpc = 0;
2869 vcpu->arch.sie_block->gbea = 1;
2870 vcpu->arch.sie_block->pp = 0;
2871 vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
2872 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
2873 kvm_clear_async_pf_completion_queue(vcpu);
2874 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
2875 kvm_s390_vcpu_stop(vcpu);
2876 kvm_s390_clear_local_irqs(vcpu);
2879 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
2881 mutex_lock(&vcpu->kvm->lock);
2883 vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
2884 vcpu->arch.sie_block->epdx = vcpu->kvm->arch.epdx;
2886 mutex_unlock(&vcpu->kvm->lock);
2887 if (!kvm_is_ucontrol(vcpu->kvm)) {
2888 vcpu->arch.gmap = vcpu->kvm->arch.gmap;
2891 if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
2892 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
2893 /* make vcpu_load load the right gmap on the first trigger */
2894 vcpu->arch.enabled_gmap = vcpu->arch.gmap;
2897 static bool kvm_has_pckmo_subfunc(struct kvm *kvm, unsigned long nr)
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))
2905 static bool kvm_has_pckmo_ecc(struct kvm *kvm)
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);
2916 static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
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.
2922 if (!vcpu->kvm->arch.crypto.apie && !test_kvm_facility(vcpu->kvm, 76))
2925 vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
2926 vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);
2927 vcpu->arch.sie_block->eca &= ~ECA_APIE;
2928 vcpu->arch.sie_block->ecd &= ~ECD_ECC;
2930 if (vcpu->kvm->arch.crypto.apie)
2931 vcpu->arch.sie_block->eca |= ECA_APIE;
2933 /* Set up protected key support */
2934 if (vcpu->kvm->arch.crypto.aes_kw) {
2935 vcpu->arch.sie_block->ecb3 |= ECB3_AES;
2936 /* ecc is also wrapped with AES key */
2937 if (kvm_has_pckmo_ecc(vcpu->kvm))
2938 vcpu->arch.sie_block->ecd |= ECD_ECC;
2941 if (vcpu->kvm->arch.crypto.dea_kw)
2942 vcpu->arch.sie_block->ecb3 |= ECB3_DEA;
2945 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
2947 free_page(vcpu->arch.sie_block->cbrlo);
2948 vcpu->arch.sie_block->cbrlo = 0;
2951 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
2953 vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
2954 if (!vcpu->arch.sie_block->cbrlo)
2959 static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
2961 struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
2963 vcpu->arch.sie_block->ibc = model->ibc;
2964 if (test_kvm_facility(vcpu->kvm, 7))
2965 vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
2968 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
2972 atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
2976 if (test_kvm_facility(vcpu->kvm, 78))
2977 kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED2);
2978 else if (test_kvm_facility(vcpu->kvm, 8))
2979 kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED);
2981 kvm_s390_vcpu_setup_model(vcpu);
2983 /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
2984 if (MACHINE_HAS_ESOP)
2985 vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT;
2986 if (test_kvm_facility(vcpu->kvm, 9))
2987 vcpu->arch.sie_block->ecb |= ECB_SRSI;
2988 if (test_kvm_facility(vcpu->kvm, 73))
2989 vcpu->arch.sie_block->ecb |= ECB_TE;
2991 if (test_kvm_facility(vcpu->kvm, 8) && vcpu->kvm->arch.use_pfmfi)
2992 vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI;
2993 if (test_kvm_facility(vcpu->kvm, 130))
2994 vcpu->arch.sie_block->ecb2 |= ECB2_IEP;
2995 vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI;
2997 vcpu->arch.sie_block->eca |= ECA_CEI;
2999 vcpu->arch.sie_block->eca |= ECA_IB;
3001 vcpu->arch.sie_block->eca |= ECA_SII;
3002 if (sclp.has_sigpif)
3003 vcpu->arch.sie_block->eca |= ECA_SIGPI;
3004 if (test_kvm_facility(vcpu->kvm, 129)) {
3005 vcpu->arch.sie_block->eca |= ECA_VX;
3006 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
3008 if (test_kvm_facility(vcpu->kvm, 139))
3009 vcpu->arch.sie_block->ecd |= ECD_MEF;
3010 if (test_kvm_facility(vcpu->kvm, 156))
3011 vcpu->arch.sie_block->ecd |= ECD_ETOKENF;
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);
3017 vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
3019 vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
3022 kvm_s390_set_cpuflags(vcpu, CPUSTAT_KSS);
3024 vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
3026 if (vcpu->kvm->arch.use_cmma) {
3027 rc = kvm_s390_vcpu_setup_cmma(vcpu);
3031 hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
3032 vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
3034 vcpu->arch.sie_block->hpid = HPID_KVM;
3036 kvm_s390_vcpu_crypto_setup(vcpu);
3041 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
3044 struct kvm_vcpu *vcpu;
3045 struct sie_page *sie_page;
3048 if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
3053 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
3057 BUILD_BUG_ON(sizeof(struct sie_page) != 4096);
3058 sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
3062 vcpu->arch.sie_block = &sie_page->sie_block;
3063 vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
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;
3069 vcpu->arch.sie_block->icpua = id;
3070 spin_lock_init(&vcpu->arch.local_int.lock);
3071 vcpu->arch.sie_block->gd = (u32)(u64)kvm->arch.gisa_int.origin;
3072 if (vcpu->arch.sie_block->gd && sclp.has_gisaf)
3073 vcpu->arch.sie_block->gd |= GISA_FORMAT1;
3074 seqcount_init(&vcpu->arch.cputm_seqcount);
3076 rc = kvm_vcpu_init(vcpu, kvm, id);
3078 goto out_free_sie_block;
3079 VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu,
3080 vcpu->arch.sie_block);
3081 trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block);
3085 free_page((unsigned long)(vcpu->arch.sie_block));
3087 kmem_cache_free(kvm_vcpu_cache, vcpu);
3092 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
3094 return kvm_s390_vcpu_has_irq(vcpu, 0);
3097 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
3099 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
3102 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
3104 atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
3108 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
3110 atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
3113 static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
3115 atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
3119 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu)
3121 return atomic_read(&vcpu->arch.sie_block->prog20) &
3122 (PROG_BLOCK_SIE | PROG_REQUEST);
3125 static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
3127 atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
3131 * Kick a guest cpu out of (v)SIE and wait until (v)SIE is not running.
3132 * If the CPU is not running (e.g. waiting as idle) the function will
3133 * return immediately. */
3134 void exit_sie(struct kvm_vcpu *vcpu)
3136 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
3137 kvm_s390_vsie_kick(vcpu);
3138 while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
3142 /* Kick a guest cpu out of SIE to process a request synchronously */
3143 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
3145 kvm_make_request(req, vcpu);
3146 kvm_s390_vcpu_request(vcpu);
3149 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
3152 struct kvm *kvm = gmap->private;
3153 struct kvm_vcpu *vcpu;
3154 unsigned long prefix;
3157 if (gmap_is_shadow(gmap))
3159 if (start >= 1UL << 31)
3160 /* We are only interested in prefix pages */
3162 kvm_for_each_vcpu(i, vcpu, kvm) {
3163 /* match against both prefix pages */
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",
3168 kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
3173 bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
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++;
3184 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
3186 /* kvm common code refers to this, but never calls it */
3191 static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
3192 struct kvm_one_reg *reg)
3197 case KVM_REG_S390_TODPR:
3198 r = put_user(vcpu->arch.sie_block->todpr,
3199 (u32 __user *)reg->addr);
3201 case KVM_REG_S390_EPOCHDIFF:
3202 r = put_user(vcpu->arch.sie_block->epoch,
3203 (u64 __user *)reg->addr);
3205 case KVM_REG_S390_CPU_TIMER:
3206 r = put_user(kvm_s390_get_cpu_timer(vcpu),
3207 (u64 __user *)reg->addr);
3209 case KVM_REG_S390_CLOCK_COMP:
3210 r = put_user(vcpu->arch.sie_block->ckc,
3211 (u64 __user *)reg->addr);
3213 case KVM_REG_S390_PFTOKEN:
3214 r = put_user(vcpu->arch.pfault_token,
3215 (u64 __user *)reg->addr);
3217 case KVM_REG_S390_PFCOMPARE:
3218 r = put_user(vcpu->arch.pfault_compare,
3219 (u64 __user *)reg->addr);
3221 case KVM_REG_S390_PFSELECT:
3222 r = put_user(vcpu->arch.pfault_select,
3223 (u64 __user *)reg->addr);
3225 case KVM_REG_S390_PP:
3226 r = put_user(vcpu->arch.sie_block->pp,
3227 (u64 __user *)reg->addr);
3229 case KVM_REG_S390_GBEA:
3230 r = put_user(vcpu->arch.sie_block->gbea,
3231 (u64 __user *)reg->addr);
3240 static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
3241 struct kvm_one_reg *reg)
3247 case KVM_REG_S390_TODPR:
3248 r = get_user(vcpu->arch.sie_block->todpr,
3249 (u32 __user *)reg->addr);
3251 case KVM_REG_S390_EPOCHDIFF:
3252 r = get_user(vcpu->arch.sie_block->epoch,
3253 (u64 __user *)reg->addr);
3255 case KVM_REG_S390_CPU_TIMER:
3256 r = get_user(val, (u64 __user *)reg->addr);
3258 kvm_s390_set_cpu_timer(vcpu, val);
3260 case KVM_REG_S390_CLOCK_COMP:
3261 r = get_user(vcpu->arch.sie_block->ckc,
3262 (u64 __user *)reg->addr);
3264 case KVM_REG_S390_PFTOKEN:
3265 r = get_user(vcpu->arch.pfault_token,
3266 (u64 __user *)reg->addr);
3267 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3268 kvm_clear_async_pf_completion_queue(vcpu);
3270 case KVM_REG_S390_PFCOMPARE:
3271 r = get_user(vcpu->arch.pfault_compare,
3272 (u64 __user *)reg->addr);
3274 case KVM_REG_S390_PFSELECT:
3275 r = get_user(vcpu->arch.pfault_select,
3276 (u64 __user *)reg->addr);
3278 case KVM_REG_S390_PP:
3279 r = get_user(vcpu->arch.sie_block->pp,
3280 (u64 __user *)reg->addr);
3282 case KVM_REG_S390_GBEA:
3283 r = get_user(vcpu->arch.sie_block->gbea,
3284 (u64 __user *)reg->addr);
3293 static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
3295 kvm_s390_vcpu_initial_reset(vcpu);
3299 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3302 memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs));
3307 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3310 memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
3315 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
3316 struct kvm_sregs *sregs)
3320 memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
3321 memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
3327 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
3328 struct kvm_sregs *sregs)
3332 memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
3333 memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
3339 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3345 if (test_fp_ctl(fpu->fpc)) {
3349 vcpu->run->s.regs.fpc = fpu->fpc;
3351 convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
3352 (freg_t *) fpu->fprs);
3354 memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
3361 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3365 /* make sure we have the latest values */
3368 convert_vx_to_fp((freg_t *) fpu->fprs,
3369 (__vector128 *) vcpu->run->s.regs.vrs);
3371 memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
3372 fpu->fpc = vcpu->run->s.regs.fpc;
3378 static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
3382 if (!is_vcpu_stopped(vcpu))
3385 vcpu->run->psw_mask = psw.mask;
3386 vcpu->run->psw_addr = psw.addr;
3391 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
3392 struct kvm_translation *tr)
3394 return -EINVAL; /* not implemented yet */
3397 #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
3398 KVM_GUESTDBG_USE_HW_BP | \
3399 KVM_GUESTDBG_ENABLE)
3401 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
3402 struct kvm_guest_debug *dbg)
3408 vcpu->guest_debug = 0;
3409 kvm_s390_clear_bp_data(vcpu);
3411 if (dbg->control & ~VALID_GUESTDBG_FLAGS) {
3415 if (!sclp.has_gpere) {
3420 if (dbg->control & KVM_GUESTDBG_ENABLE) {
3421 vcpu->guest_debug = dbg->control;
3422 /* enforce guest PER */
3423 kvm_s390_set_cpuflags(vcpu, CPUSTAT_P);
3425 if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
3426 rc = kvm_s390_import_bp_data(vcpu, dbg);
3428 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
3429 vcpu->arch.guestdbg.last_bp = 0;
3433 vcpu->guest_debug = 0;
3434 kvm_s390_clear_bp_data(vcpu);
3435 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
3443 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
3444 struct kvm_mp_state *mp_state)
3450 /* CHECK_STOP and LOAD are not supported yet */
3451 ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
3452 KVM_MP_STATE_OPERATING;
3458 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
3459 struct kvm_mp_state *mp_state)
3465 /* user space knows about this interface - let it control the state */
3466 vcpu->kvm->arch.user_cpu_state_ctrl = 1;
3468 switch (mp_state->mp_state) {
3469 case KVM_MP_STATE_STOPPED:
3470 kvm_s390_vcpu_stop(vcpu);
3472 case KVM_MP_STATE_OPERATING:
3473 kvm_s390_vcpu_start(vcpu);
3475 case KVM_MP_STATE_LOAD:
3476 case KVM_MP_STATE_CHECK_STOP:
3477 /* fall through - CHECK_STOP and LOAD are not supported yet */
3486 static bool ibs_enabled(struct kvm_vcpu *vcpu)
3488 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_IBS);
3491 static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
3494 kvm_s390_vcpu_request_handled(vcpu);
3495 if (!kvm_request_pending(vcpu))
3498 * We use MMU_RELOAD just to re-arm the ipte notifier for the
3499 * guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
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.
3504 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
3506 rc = gmap_mprotect_notify(vcpu->arch.gmap,
3507 kvm_s390_get_prefix(vcpu),
3508 PAGE_SIZE * 2, PROT_WRITE);
3510 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
3516 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
3517 vcpu->arch.sie_block->ihcpu = 0xffff;
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);
3524 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IBS);
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);
3532 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IBS);
3537 if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
3538 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
3542 if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) {
3544 * Disable CMM virtualization; we will emulate the ESSA
3545 * instruction manually, in order to provide additional
3546 * functionalities needed for live migration.
3548 vcpu->arch.sie_block->ecb2 &= ~ECB2_CMMA;
3552 if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) {
3554 * Re-enable CMM virtualization if CMMA is available and
3555 * CMM has been used.
3557 if ((vcpu->kvm->arch.use_cmma) &&
3558 (vcpu->kvm->mm->context.uses_cmm))
3559 vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
3563 /* nothing to do, just clear the request */
3564 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
3565 /* we left the vsie handler, nothing to do, just clear the request */
3566 kvm_clear_request(KVM_REQ_VSIE_RESTART, vcpu);
3571 void kvm_s390_set_tod_clock(struct kvm *kvm,
3572 const struct kvm_s390_vm_tod_clock *gtod)
3574 struct kvm_vcpu *vcpu;
3575 struct kvm_s390_tod_clock_ext htod;
3578 mutex_lock(&kvm->lock);
3581 get_tod_clock_ext((char *)&htod);
3583 kvm->arch.epoch = gtod->tod - htod.tod;
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;
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;
3597 kvm_s390_vcpu_unblock_all(kvm);
3599 mutex_unlock(&kvm->lock);
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
3608 * Make sure that a guest page has been faulted-in on the host.
3610 * Return: Zero on success, negative error code otherwise.
3612 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
3614 return gmap_fault(vcpu->arch.gmap, gpa,
3615 writable ? FAULT_FLAG_WRITE : 0);
3618 static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
3619 unsigned long token)
3621 struct kvm_s390_interrupt inti;
3622 struct kvm_s390_irq irq;
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));
3629 inti.type = KVM_S390_INT_PFAULT_DONE;
3630 inti.parm64 = token;
3631 WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
3635 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
3636 struct kvm_async_pf *work)
3638 trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
3639 __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
3642 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
3643 struct kvm_async_pf *work)
3645 trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
3646 __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
3649 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
3650 struct kvm_async_pf *work)
3652 /* s390 will always inject the page directly */
3655 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
3658 * s390 will always inject the page directly,
3659 * but we still want check_async_completion to cleanup
3664 static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
3667 struct kvm_arch_async_pf arch;
3670 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3672 if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
3673 vcpu->arch.pfault_compare)
3675 if (psw_extint_disabled(vcpu))
3677 if (kvm_s390_vcpu_has_irq(vcpu, 0))
3679 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK))
3681 if (!vcpu->arch.gmap->pfault_enabled)
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))
3689 rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
3693 static int vcpu_pre_run(struct kvm_vcpu *vcpu)
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.
3702 kvm_check_async_pf_completion(vcpu);
3704 vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
3705 vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
3710 if (test_cpu_flag(CIF_MCCK_PENDING))
3713 if (!kvm_is_ucontrol(vcpu->kvm)) {
3714 rc = kvm_s390_deliver_pending_interrupts(vcpu);
3719 rc = kvm_s390_handle_requests(vcpu);
3723 if (guestdbg_enabled(vcpu)) {
3724 kvm_s390_backup_guest_per_regs(vcpu);
3725 kvm_s390_patch_guest_per_regs(vcpu);
3728 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.gisa_int.kicked_mask);
3730 vcpu->arch.sie_block->icptcode = 0;
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);
3738 static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
3740 struct kvm_s390_pgm_info pgm_info = {
3741 .code = PGM_ADDRESSING,
3746 VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
3747 trace_kvm_s390_sie_fault(vcpu);
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.
3757 rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
3758 ilen = insn_length(opcode);
3762 /* Instruction-Fetching Exceptions - we can't detect the ilen.
3763 * Forward by arbitrary ilc, injection will take care of
3764 * nullification if necessary.
3766 pgm_info = vcpu->arch.pgm;
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);
3774 static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
3776 struct mcck_volatile_info *mcck_info;
3777 struct sie_page *sie_page;
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);
3783 if (guestdbg_enabled(vcpu))
3784 kvm_s390_restore_guest_per_regs(vcpu);
3786 vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
3787 vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
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);
3798 if (vcpu->arch.sie_block->icptcode > 0) {
3799 int rc = kvm_handle_sie_intercept(vcpu);
3801 if (rc != -EOPNOTSUPP)
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;
3808 } else if (exit_reason != -EFAULT) {
3809 vcpu->stat.exit_null++;
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;
3817 } else if (current->thread.gmap_pfault) {
3818 trace_kvm_s390_major_guest_pfault(vcpu);
3819 current->thread.gmap_pfault = 0;
3820 if (kvm_arch_setup_async_pf(vcpu))
3822 return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
3824 return vcpu_post_run_fault_in_sie(vcpu);
3827 static int __vcpu_run(struct kvm_vcpu *vcpu)
3829 int rc, exit_reason;
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
3835 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3838 rc = vcpu_pre_run(vcpu);
3842 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
3844 * As PF_VCPU will be used in fault handler, between
3845 * guest_enter and guest_exit should be no uaccess.
3847 local_irq_disable();
3848 guest_enter_irqoff();
3849 __disable_cpu_timer_accounting(vcpu);
3851 exit_reason = sie64a(vcpu->arch.sie_block,
3852 vcpu->run->s.regs.gprs);
3853 local_irq_disable();
3854 __enable_cpu_timer_accounting(vcpu);
3855 guest_exit_irqoff();
3857 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3859 rc = vcpu_post_run(vcpu, exit_reason);
3860 } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
3862 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
3866 static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
3868 struct runtime_instr_cb *riccb;
3871 riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
3872 gscb = (struct gs_cb *) &kvm_run->s.regs.gscb;
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);
3879 /* some control register changes require a tlb flush */
3880 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
3882 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
3883 kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
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;
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;
3893 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3894 kvm_clear_async_pf_completion_queue(vcpu);
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.
3900 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
3901 test_kvm_facility(vcpu->kvm, 64) &&
3903 !(vcpu->arch.sie_block->ecb3 & ECB3_RI)) {
3904 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
3905 vcpu->arch.sie_block->ecb3 |= ECB3_RI;
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.
3911 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) &&
3912 test_kvm_facility(vcpu->kvm, 133) &&
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;
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;
3925 save_access_regs(vcpu->arch.host_acrs);
3926 restore_access_regs(vcpu->run->s.regs.acrs);
3927 /* save host (userspace) fprs/vrs */
3929 vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
3930 vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
3932 current->thread.fpu.regs = vcpu->run->s.regs.vrs;
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;
3939 if (MACHINE_HAS_GS) {
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);
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);
3953 /* SIE will load etoken directly from SDNX and therefore kvm_run */
3955 kvm_run->kvm_dirty_regs = 0;
3958 static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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);
3964 kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
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;
3972 kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC;
3973 save_access_regs(vcpu->run->s.regs.acrs);
3974 restore_access_regs(vcpu->arch.host_acrs);
3975 /* Save guest register state */
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;
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);
3986 current->thread.gs_cb = vcpu->arch.host_gscb;
3987 restore_gs_cb(vcpu->arch.host_gscb);
3989 if (!vcpu->arch.host_gscb)
3990 __ctl_clear_bit(2, 4);
3991 vcpu->arch.host_gscb = NULL;
3993 /* SIE will save etoken directly into SDNX and therefore kvm_run */
3996 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4000 if (kvm_run->immediate_exit)
4003 if (kvm_run->kvm_valid_regs & ~KVM_SYNC_S390_VALID_FIELDS ||
4004 kvm_run->kvm_dirty_regs & ~KVM_SYNC_S390_VALID_FIELDS)
4009 if (guestdbg_exit_pending(vcpu)) {
4010 kvm_s390_prepare_debug_exit(vcpu);
4015 kvm_sigset_activate(vcpu);
4017 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
4018 kvm_s390_vcpu_start(vcpu);
4019 } else if (is_vcpu_stopped(vcpu)) {
4020 pr_err_ratelimited("can't run stopped vcpu %d\n",
4026 sync_regs(vcpu, kvm_run);
4027 enable_cpu_timer_accounting(vcpu);
4030 rc = __vcpu_run(vcpu);
4032 if (signal_pending(current) && !rc) {
4033 kvm_run->exit_reason = KVM_EXIT_INTR;
4037 if (guestdbg_exit_pending(vcpu) && !rc) {
4038 kvm_s390_prepare_debug_exit(vcpu);
4042 if (rc == -EREMOTE) {
4043 /* userspace support is needed, kvm_run has been prepared */
4047 disable_cpu_timer_accounting(vcpu);
4048 store_regs(vcpu, kvm_run);
4050 kvm_sigset_deactivate(vcpu);
4052 vcpu->stat.exit_userspace++;
4059 * store status at address
4060 * we use have two special cases:
4061 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
4062 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
4064 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
4066 unsigned char archmode = 1;
4067 freg_t fprs[NUM_FPRS];
4072 px = kvm_s390_get_prefix(vcpu);
4073 if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
4074 if (write_guest_abs(vcpu, 163, &archmode, 1))
4077 } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
4078 if (write_guest_real(vcpu, 163, &archmode, 1))
4082 gpa -= __LC_FPREGS_SAVE_AREA;
4084 /* manually convert vector registers if necessary */
4085 if (MACHINE_HAS_VX) {
4086 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
4087 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
4090 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
4091 vcpu->run->s.regs.fprs, 128);
4093 rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
4094 vcpu->run->s.regs.gprs, 128);
4095 rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
4096 &vcpu->arch.sie_block->gpsw, 16);
4097 rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
4099 rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
4100 &vcpu->run->s.regs.fpc, 4);
4101 rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
4102 &vcpu->arch.sie_block->todpr, 4);
4103 cputm = kvm_s390_get_cpu_timer(vcpu);
4104 rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
4106 clkcomp = vcpu->arch.sie_block->ckc >> 8;
4107 rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
4109 rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
4110 &vcpu->run->s.regs.acrs, 64);
4111 rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
4112 &vcpu->arch.sie_block->gcr, 128);
4113 return rc ? -EFAULT : 0;
4116 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
4119 * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
4120 * switch in the run ioctl. Let's update our copies before we save
4121 * it into the save area
4124 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
4125 save_access_regs(vcpu->run->s.regs.acrs);
4127 return kvm_s390_store_status_unloaded(vcpu, addr);
4130 static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
4132 kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
4133 kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
4136 static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
4139 struct kvm_vcpu *vcpu;
4141 kvm_for_each_vcpu(i, vcpu, kvm) {
4142 __disable_ibs_on_vcpu(vcpu);
4146 static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
4150 kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
4151 kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
4154 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
4156 int i, online_vcpus, started_vcpus = 0;
4158 if (!is_vcpu_stopped(vcpu))
4161 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
4162 /* Only one cpu at a time may enter/leave the STOPPED state. */
4163 spin_lock(&vcpu->kvm->arch.start_stop_lock);
4164 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
4166 for (i = 0; i < online_vcpus; i++) {
4167 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
4171 if (started_vcpus == 0) {
4172 /* we're the only active VCPU -> speed it up */
4173 __enable_ibs_on_vcpu(vcpu);
4174 } else if (started_vcpus == 1) {
4176 * As we are starting a second VCPU, we have to disable
4177 * the IBS facility on all VCPUs to remove potentially
4178 * oustanding ENABLE requests.
4180 __disable_ibs_on_all_vcpus(vcpu->kvm);
4183 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_STOPPED);
4185 * Another VCPU might have used IBS while we were offline.
4186 * Let's play safe and flush the VCPU at startup.
4188 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
4189 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4193 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
4195 int i, online_vcpus, started_vcpus = 0;
4196 struct kvm_vcpu *started_vcpu = NULL;
4198 if (is_vcpu_stopped(vcpu))
4201 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
4202 /* Only one cpu at a time may enter/leave the STOPPED state. */
4203 spin_lock(&vcpu->kvm->arch.start_stop_lock);
4204 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
4206 /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
4207 kvm_s390_clear_stop_irq(vcpu);
4209 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOPPED);
4210 __disable_ibs_on_vcpu(vcpu);
4212 for (i = 0; i < online_vcpus; i++) {
4213 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
4215 started_vcpu = vcpu->kvm->vcpus[i];
4219 if (started_vcpus == 1) {
4221 * As we only have one VCPU left, we want to enable the
4222 * IBS facility for that VCPU to speed it up.
4224 __enable_ibs_on_vcpu(started_vcpu);
4227 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4231 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
4232 struct kvm_enable_cap *cap)
4240 case KVM_CAP_S390_CSS_SUPPORT:
4241 if (!vcpu->kvm->arch.css_support) {
4242 vcpu->kvm->arch.css_support = 1;
4243 VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
4244 trace_kvm_s390_enable_css(vcpu->kvm);
4255 static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
4256 struct kvm_s390_mem_op *mop)
4258 void __user *uaddr = (void __user *)mop->buf;
4259 void *tmpbuf = NULL;
4261 const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
4262 | KVM_S390_MEMOP_F_CHECK_ONLY;
4264 if (mop->flags & ~supported_flags || mop->ar >= NUM_ACRS || !mop->size)
4267 if (mop->size > MEM_OP_MAX_SIZE)
4270 if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
4271 tmpbuf = vmalloc(mop->size);
4276 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4279 case KVM_S390_MEMOP_LOGICAL_READ:
4280 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
4281 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4282 mop->size, GACC_FETCH);
4285 r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4287 if (copy_to_user(uaddr, tmpbuf, mop->size))
4291 case KVM_S390_MEMOP_LOGICAL_WRITE:
4292 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
4293 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4294 mop->size, GACC_STORE);
4297 if (copy_from_user(tmpbuf, uaddr, mop->size)) {
4301 r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4307 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
4309 if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
4310 kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
4316 long kvm_arch_vcpu_async_ioctl(struct file *filp,
4317 unsigned int ioctl, unsigned long arg)
4319 struct kvm_vcpu *vcpu = filp->private_data;
4320 void __user *argp = (void __user *)arg;
4323 case KVM_S390_IRQ: {
4324 struct kvm_s390_irq s390irq;
4326 if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
4328 return kvm_s390_inject_vcpu(vcpu, &s390irq);
4330 case KVM_S390_INTERRUPT: {
4331 struct kvm_s390_interrupt s390int;
4332 struct kvm_s390_irq s390irq = {};
4334 if (copy_from_user(&s390int, argp, sizeof(s390int)))
4336 if (s390int_to_s390irq(&s390int, &s390irq))
4338 return kvm_s390_inject_vcpu(vcpu, &s390irq);
4341 return -ENOIOCTLCMD;
4344 long kvm_arch_vcpu_ioctl(struct file *filp,
4345 unsigned int ioctl, unsigned long arg)
4347 struct kvm_vcpu *vcpu = filp->private_data;
4348 void __user *argp = (void __user *)arg;
4355 case KVM_S390_STORE_STATUS:
4356 idx = srcu_read_lock(&vcpu->kvm->srcu);
4357 r = kvm_s390_vcpu_store_status(vcpu, arg);
4358 srcu_read_unlock(&vcpu->kvm->srcu, idx);
4360 case KVM_S390_SET_INITIAL_PSW: {
4364 if (copy_from_user(&psw, argp, sizeof(psw)))
4366 r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
4369 case KVM_S390_INITIAL_RESET:
4370 r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
4372 case KVM_SET_ONE_REG:
4373 case KVM_GET_ONE_REG: {
4374 struct kvm_one_reg reg;
4376 if (copy_from_user(®, argp, sizeof(reg)))
4378 if (ioctl == KVM_SET_ONE_REG)
4379 r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®);
4381 r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®);
4384 #ifdef CONFIG_KVM_S390_UCONTROL
4385 case KVM_S390_UCAS_MAP: {
4386 struct kvm_s390_ucas_mapping ucasmap;
4388 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4393 if (!kvm_is_ucontrol(vcpu->kvm)) {
4398 r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
4399 ucasmap.vcpu_addr, ucasmap.length);
4402 case KVM_S390_UCAS_UNMAP: {
4403 struct kvm_s390_ucas_mapping ucasmap;
4405 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4410 if (!kvm_is_ucontrol(vcpu->kvm)) {
4415 r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
4420 case KVM_S390_VCPU_FAULT: {
4421 r = gmap_fault(vcpu->arch.gmap, arg, 0);
4424 case KVM_ENABLE_CAP:
4426 struct kvm_enable_cap cap;
4428 if (copy_from_user(&cap, argp, sizeof(cap)))
4430 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
4433 case KVM_S390_MEM_OP: {
4434 struct kvm_s390_mem_op mem_op;
4436 if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
4437 r = kvm_s390_guest_mem_op(vcpu, &mem_op);
4442 case KVM_S390_SET_IRQ_STATE: {
4443 struct kvm_s390_irq_state irq_state;
4446 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4448 if (irq_state.len > VCPU_IRQS_MAX_BUF ||
4449 irq_state.len == 0 ||
4450 irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
4454 /* do not use irq_state.flags, it will break old QEMUs */
4455 r = kvm_s390_set_irq_state(vcpu,
4456 (void __user *) irq_state.buf,
4460 case KVM_S390_GET_IRQ_STATE: {
4461 struct kvm_s390_irq_state irq_state;
4464 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4466 if (irq_state.len == 0) {
4470 /* do not use irq_state.flags, it will break old QEMUs */
4471 r = kvm_s390_get_irq_state(vcpu,
4472 (__u8 __user *) irq_state.buf,
4484 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
4486 #ifdef CONFIG_KVM_S390_UCONTROL
4487 if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
4488 && (kvm_is_ucontrol(vcpu->kvm))) {
4489 vmf->page = virt_to_page(vcpu->arch.sie_block);
4490 get_page(vmf->page);
4494 return VM_FAULT_SIGBUS;
4497 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
4498 unsigned long npages)
4503 /* Section: memory related */
4504 int kvm_arch_prepare_memory_region(struct kvm *kvm,
4505 struct kvm_memory_slot *memslot,
4506 const struct kvm_userspace_memory_region *mem,
4507 enum kvm_mr_change change)
4509 /* A few sanity checks. We can have memory slots which have to be
4510 located/ended at a segment boundary (1MB). The memory in userland is
4511 ok to be fragmented into various different vmas. It is okay to mmap()
4512 and munmap() stuff in this slot after doing this call at any time */
4514 if (mem->userspace_addr & 0xffffful)
4517 if (mem->memory_size & 0xffffful)
4520 if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
4526 void kvm_arch_commit_memory_region(struct kvm *kvm,
4527 const struct kvm_userspace_memory_region *mem,
4528 const struct kvm_memory_slot *old,
4529 const struct kvm_memory_slot *new,
4530 enum kvm_mr_change change)
4536 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4537 old->npages * PAGE_SIZE);
4540 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4541 old->npages * PAGE_SIZE);
4546 rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
4547 mem->guest_phys_addr, mem->memory_size);
4549 case KVM_MR_FLAGS_ONLY:
4552 WARN(1, "Unknown KVM MR CHANGE: %d\n", change);
4555 pr_warn("failed to commit memory region\n");
4559 static inline unsigned long nonhyp_mask(int i)
4561 unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
4563 return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
4566 void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
4568 vcpu->valid_wakeup = false;
4571 static int __init kvm_s390_init(void)
4575 if (!sclp.has_sief2) {
4576 pr_info("SIE is not available\n");
4580 if (nested && hpage) {
4581 pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n");
4585 for (i = 0; i < 16; i++)
4586 kvm_s390_fac_base[i] |=
4587 S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
4589 return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
4592 static void __exit kvm_s390_exit(void)
4597 module_init(kvm_s390_init);
4598 module_exit(kvm_s390_exit);
4601 * Enable autoloading of the kvm module.
4602 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
4603 * since x86 takes a different approach.
4605 #include <linux/miscdevice.h>
4606 MODULE_ALIAS_MISCDEV(KVM_MINOR);
4607 MODULE_ALIAS("devname:kvm");