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 unsigned long function = (unsigned long)nr | 0x100;
325 " lgr 0,%[function]\n"
326 /* Parameter registers are ignored for "test bit" */
331 : [function] "d" (function)
336 static __always_inline void __insn32_query(unsigned int opcode, u8 *query)
341 /* Parameter registers are ignored */
342 " .insn rrf,%[opc] << 16,2,4,6,0\n"
344 : [query] "d" ((unsigned long)query), [opc] "i" (opcode)
345 : "cc", "memory", "0", "1");
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 (start >= slots->used_slots)
1936 return slots->used_slots - 1;
1938 if (gfn >= memslots[start].base_gfn &&
1939 gfn < memslots[start].base_gfn + memslots[start].npages) {
1940 atomic_set(&slots->lru_slot, start);
1946 static int kvm_s390_peek_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1947 u8 *res, unsigned long bufsize)
1949 unsigned long pgstev, hva, cur_gfn = args->start_gfn;
1952 while (args->count < bufsize) {
1953 hva = gfn_to_hva(kvm, cur_gfn);
1955 * We return an error if the first value was invalid, but we
1956 * return successfully if at least one value was copied.
1958 if (kvm_is_error_hva(hva))
1959 return args->count ? 0 : -EFAULT;
1960 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
1962 res[args->count++] = (pgstev >> 24) & 0x43;
1969 static unsigned long kvm_s390_next_dirty_cmma(struct kvm_memslots *slots,
1970 unsigned long cur_gfn)
1972 int slotidx = gfn_to_memslot_approx(slots, cur_gfn);
1973 struct kvm_memory_slot *ms = slots->memslots + slotidx;
1974 unsigned long ofs = cur_gfn - ms->base_gfn;
1976 if (ms->base_gfn + ms->npages <= cur_gfn) {
1978 /* If we are above the highest slot, wrap around */
1980 slotidx = slots->used_slots - 1;
1982 ms = slots->memslots + slotidx;
1986 if (cur_gfn < ms->base_gfn)
1989 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, ofs);
1990 while ((slotidx > 0) && (ofs >= ms->npages)) {
1992 ms = slots->memslots + slotidx;
1993 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, 0);
1995 return ms->base_gfn + ofs;
1998 static int kvm_s390_get_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1999 u8 *res, unsigned long bufsize)
2001 unsigned long mem_end, cur_gfn, next_gfn, hva, pgstev;
2002 struct kvm_memslots *slots = kvm_memslots(kvm);
2003 struct kvm_memory_slot *ms;
2005 cur_gfn = kvm_s390_next_dirty_cmma(slots, args->start_gfn);
2006 ms = gfn_to_memslot(kvm, cur_gfn);
2008 args->start_gfn = cur_gfn;
2011 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2012 mem_end = slots->memslots[0].base_gfn + slots->memslots[0].npages;
2014 while (args->count < bufsize) {
2015 hva = gfn_to_hva(kvm, cur_gfn);
2016 if (kvm_is_error_hva(hva))
2018 /* Decrement only if we actually flipped the bit to 0 */
2019 if (test_and_clear_bit(cur_gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms)))
2020 atomic64_dec(&kvm->arch.cmma_dirty_pages);
2021 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
2023 /* Save the value */
2024 res[args->count++] = (pgstev >> 24) & 0x43;
2025 /* If the next bit is too far away, stop. */
2026 if (next_gfn > cur_gfn + KVM_S390_MAX_BIT_DISTANCE)
2028 /* If we reached the previous "next", find the next one */
2029 if (cur_gfn == next_gfn)
2030 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2031 /* Reached the end of memory or of the buffer, stop */
2032 if ((next_gfn >= mem_end) ||
2033 (next_gfn - args->start_gfn >= bufsize))
2036 /* Reached the end of the current memslot, take the next one. */
2037 if (cur_gfn - ms->base_gfn >= ms->npages) {
2038 ms = gfn_to_memslot(kvm, cur_gfn);
2047 * This function searches for the next page with dirty CMMA attributes, and
2048 * saves the attributes in the buffer up to either the end of the buffer or
2049 * until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found;
2050 * no trailing clean bytes are saved.
2051 * In case no dirty bits were found, or if CMMA was not enabled or used, the
2052 * output buffer will indicate 0 as length.
2054 static int kvm_s390_get_cmma_bits(struct kvm *kvm,
2055 struct kvm_s390_cmma_log *args)
2057 unsigned long bufsize;
2058 int srcu_idx, peek, ret;
2061 if (!kvm->arch.use_cmma)
2063 /* Invalid/unsupported flags were specified */
2064 if (args->flags & ~KVM_S390_CMMA_PEEK)
2066 /* Migration mode query, and we are not doing a migration */
2067 peek = !!(args->flags & KVM_S390_CMMA_PEEK);
2068 if (!peek && !kvm->arch.migration_mode)
2070 /* CMMA is disabled or was not used, or the buffer has length zero */
2071 bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX);
2072 if (!bufsize || !kvm->mm->context.uses_cmm) {
2073 memset(args, 0, sizeof(*args));
2076 /* We are not peeking, and there are no dirty pages */
2077 if (!peek && !atomic64_read(&kvm->arch.cmma_dirty_pages)) {
2078 memset(args, 0, sizeof(*args));
2082 values = vmalloc(bufsize);
2086 down_read(&kvm->mm->mmap_sem);
2087 srcu_idx = srcu_read_lock(&kvm->srcu);
2089 ret = kvm_s390_peek_cmma(kvm, args, values, bufsize);
2091 ret = kvm_s390_get_cmma(kvm, args, values, bufsize);
2092 srcu_read_unlock(&kvm->srcu, srcu_idx);
2093 up_read(&kvm->mm->mmap_sem);
2095 if (kvm->arch.migration_mode)
2096 args->remaining = atomic64_read(&kvm->arch.cmma_dirty_pages);
2098 args->remaining = 0;
2100 if (copy_to_user((void __user *)args->values, values, args->count))
2108 * This function sets the CMMA attributes for the given pages. If the input
2109 * buffer has zero length, no action is taken, otherwise the attributes are
2110 * set and the mm->context.uses_cmm flag is set.
2112 static int kvm_s390_set_cmma_bits(struct kvm *kvm,
2113 const struct kvm_s390_cmma_log *args)
2115 unsigned long hva, mask, pgstev, i;
2117 int srcu_idx, r = 0;
2121 if (!kvm->arch.use_cmma)
2123 /* invalid/unsupported flags */
2124 if (args->flags != 0)
2126 /* Enforce sane limit on memory allocation */
2127 if (args->count > KVM_S390_CMMA_SIZE_MAX)
2130 if (args->count == 0)
2133 bits = vmalloc(array_size(sizeof(*bits), args->count));
2137 r = copy_from_user(bits, (void __user *)args->values, args->count);
2143 down_read(&kvm->mm->mmap_sem);
2144 srcu_idx = srcu_read_lock(&kvm->srcu);
2145 for (i = 0; i < args->count; i++) {
2146 hva = gfn_to_hva(kvm, args->start_gfn + i);
2147 if (kvm_is_error_hva(hva)) {
2153 pgstev = pgstev << 24;
2154 mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT;
2155 set_pgste_bits(kvm->mm, hva, mask, pgstev);
2157 srcu_read_unlock(&kvm->srcu, srcu_idx);
2158 up_read(&kvm->mm->mmap_sem);
2160 if (!kvm->mm->context.uses_cmm) {
2161 down_write(&kvm->mm->mmap_sem);
2162 kvm->mm->context.uses_cmm = 1;
2163 up_write(&kvm->mm->mmap_sem);
2170 long kvm_arch_vm_ioctl(struct file *filp,
2171 unsigned int ioctl, unsigned long arg)
2173 struct kvm *kvm = filp->private_data;
2174 void __user *argp = (void __user *)arg;
2175 struct kvm_device_attr attr;
2179 case KVM_S390_INTERRUPT: {
2180 struct kvm_s390_interrupt s390int;
2183 if (copy_from_user(&s390int, argp, sizeof(s390int)))
2185 r = kvm_s390_inject_vm(kvm, &s390int);
2188 case KVM_CREATE_IRQCHIP: {
2189 struct kvm_irq_routing_entry routing;
2192 if (kvm->arch.use_irqchip) {
2193 /* Set up dummy routing. */
2194 memset(&routing, 0, sizeof(routing));
2195 r = kvm_set_irq_routing(kvm, &routing, 0, 0);
2199 case KVM_SET_DEVICE_ATTR: {
2201 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2203 r = kvm_s390_vm_set_attr(kvm, &attr);
2206 case KVM_GET_DEVICE_ATTR: {
2208 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2210 r = kvm_s390_vm_get_attr(kvm, &attr);
2213 case KVM_HAS_DEVICE_ATTR: {
2215 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2217 r = kvm_s390_vm_has_attr(kvm, &attr);
2220 case KVM_S390_GET_SKEYS: {
2221 struct kvm_s390_skeys args;
2224 if (copy_from_user(&args, argp,
2225 sizeof(struct kvm_s390_skeys)))
2227 r = kvm_s390_get_skeys(kvm, &args);
2230 case KVM_S390_SET_SKEYS: {
2231 struct kvm_s390_skeys args;
2234 if (copy_from_user(&args, argp,
2235 sizeof(struct kvm_s390_skeys)))
2237 r = kvm_s390_set_skeys(kvm, &args);
2240 case KVM_S390_GET_CMMA_BITS: {
2241 struct kvm_s390_cmma_log args;
2244 if (copy_from_user(&args, argp, sizeof(args)))
2246 mutex_lock(&kvm->slots_lock);
2247 r = kvm_s390_get_cmma_bits(kvm, &args);
2248 mutex_unlock(&kvm->slots_lock);
2250 r = copy_to_user(argp, &args, sizeof(args));
2256 case KVM_S390_SET_CMMA_BITS: {
2257 struct kvm_s390_cmma_log args;
2260 if (copy_from_user(&args, argp, sizeof(args)))
2262 mutex_lock(&kvm->slots_lock);
2263 r = kvm_s390_set_cmma_bits(kvm, &args);
2264 mutex_unlock(&kvm->slots_lock);
2274 static int kvm_s390_apxa_installed(void)
2276 struct ap_config_info info;
2278 if (ap_instructions_available()) {
2279 if (ap_qci(&info) == 0)
2287 * The format of the crypto control block (CRYCB) is specified in the 3 low
2288 * order bits of the CRYCB designation (CRYCBD) field as follows:
2289 * Format 0: Neither the message security assist extension 3 (MSAX3) nor the
2290 * AP extended addressing (APXA) facility are installed.
2291 * Format 1: The APXA facility is not installed but the MSAX3 facility is.
2292 * Format 2: Both the APXA and MSAX3 facilities are installed
2294 static void kvm_s390_set_crycb_format(struct kvm *kvm)
2296 kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
2298 /* Clear the CRYCB format bits - i.e., set format 0 by default */
2299 kvm->arch.crypto.crycbd &= ~(CRYCB_FORMAT_MASK);
2301 /* Check whether MSAX3 is installed */
2302 if (!test_kvm_facility(kvm, 76))
2305 if (kvm_s390_apxa_installed())
2306 kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
2308 kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
2311 void kvm_arch_crypto_set_masks(struct kvm *kvm, unsigned long *apm,
2312 unsigned long *aqm, unsigned long *adm)
2314 struct kvm_s390_crypto_cb *crycb = kvm->arch.crypto.crycb;
2316 mutex_lock(&kvm->lock);
2317 kvm_s390_vcpu_block_all(kvm);
2319 switch (kvm->arch.crypto.crycbd & CRYCB_FORMAT_MASK) {
2320 case CRYCB_FORMAT2: /* APCB1 use 256 bits */
2321 memcpy(crycb->apcb1.apm, apm, 32);
2322 VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx %016lx %016lx %016lx",
2323 apm[0], apm[1], apm[2], apm[3]);
2324 memcpy(crycb->apcb1.aqm, aqm, 32);
2325 VM_EVENT(kvm, 3, "SET CRYCB: aqm %016lx %016lx %016lx %016lx",
2326 aqm[0], aqm[1], aqm[2], aqm[3]);
2327 memcpy(crycb->apcb1.adm, adm, 32);
2328 VM_EVENT(kvm, 3, "SET CRYCB: adm %016lx %016lx %016lx %016lx",
2329 adm[0], adm[1], adm[2], adm[3]);
2332 case CRYCB_FORMAT0: /* Fall through both use APCB0 */
2333 memcpy(crycb->apcb0.apm, apm, 8);
2334 memcpy(crycb->apcb0.aqm, aqm, 2);
2335 memcpy(crycb->apcb0.adm, adm, 2);
2336 VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx aqm %04x adm %04x",
2337 apm[0], *((unsigned short *)aqm),
2338 *((unsigned short *)adm));
2340 default: /* Can not happen */
2344 /* recreate the shadow crycb for each vcpu */
2345 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
2346 kvm_s390_vcpu_unblock_all(kvm);
2347 mutex_unlock(&kvm->lock);
2349 EXPORT_SYMBOL_GPL(kvm_arch_crypto_set_masks);
2351 void kvm_arch_crypto_clear_masks(struct kvm *kvm)
2353 mutex_lock(&kvm->lock);
2354 kvm_s390_vcpu_block_all(kvm);
2356 memset(&kvm->arch.crypto.crycb->apcb0, 0,
2357 sizeof(kvm->arch.crypto.crycb->apcb0));
2358 memset(&kvm->arch.crypto.crycb->apcb1, 0,
2359 sizeof(kvm->arch.crypto.crycb->apcb1));
2361 VM_EVENT(kvm, 3, "%s", "CLR CRYCB:");
2362 /* recreate the shadow crycb for each vcpu */
2363 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
2364 kvm_s390_vcpu_unblock_all(kvm);
2365 mutex_unlock(&kvm->lock);
2367 EXPORT_SYMBOL_GPL(kvm_arch_crypto_clear_masks);
2369 static u64 kvm_s390_get_initial_cpuid(void)
2374 cpuid.version = 0xff;
2375 return *((u64 *) &cpuid);
2378 static void kvm_s390_crypto_init(struct kvm *kvm)
2380 kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
2381 kvm_s390_set_crycb_format(kvm);
2383 if (!test_kvm_facility(kvm, 76))
2386 /* Enable AES/DEA protected key functions by default */
2387 kvm->arch.crypto.aes_kw = 1;
2388 kvm->arch.crypto.dea_kw = 1;
2389 get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
2390 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
2391 get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
2392 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
2395 static void sca_dispose(struct kvm *kvm)
2397 if (kvm->arch.use_esca)
2398 free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
2400 free_page((unsigned long)(kvm->arch.sca));
2401 kvm->arch.sca = NULL;
2404 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
2406 gfp_t alloc_flags = GFP_KERNEL;
2408 char debug_name[16];
2409 static unsigned long sca_offset;
2412 #ifdef CONFIG_KVM_S390_UCONTROL
2413 if (type & ~KVM_VM_S390_UCONTROL)
2415 if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
2422 rc = s390_enable_sie();
2428 if (!sclp.has_64bscao)
2429 alloc_flags |= GFP_DMA;
2430 rwlock_init(&kvm->arch.sca_lock);
2431 /* start with basic SCA */
2432 kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
2435 mutex_lock(&kvm_lock);
2437 if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
2439 kvm->arch.sca = (struct bsca_block *)
2440 ((char *) kvm->arch.sca + sca_offset);
2441 mutex_unlock(&kvm_lock);
2443 sprintf(debug_name, "kvm-%u", current->pid);
2445 kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
2449 BUILD_BUG_ON(sizeof(struct sie_page2) != 4096);
2450 kvm->arch.sie_page2 =
2451 (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2452 if (!kvm->arch.sie_page2)
2455 kvm->arch.sie_page2->kvm = kvm;
2456 kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
2458 for (i = 0; i < kvm_s390_fac_size(); i++) {
2459 kvm->arch.model.fac_mask[i] = S390_lowcore.stfle_fac_list[i] &
2460 (kvm_s390_fac_base[i] |
2461 kvm_s390_fac_ext[i]);
2462 kvm->arch.model.fac_list[i] = S390_lowcore.stfle_fac_list[i] &
2463 kvm_s390_fac_base[i];
2465 kvm->arch.model.subfuncs = kvm_s390_available_subfunc;
2467 /* we are always in czam mode - even on pre z14 machines */
2468 set_kvm_facility(kvm->arch.model.fac_mask, 138);
2469 set_kvm_facility(kvm->arch.model.fac_list, 138);
2470 /* we emulate STHYI in kvm */
2471 set_kvm_facility(kvm->arch.model.fac_mask, 74);
2472 set_kvm_facility(kvm->arch.model.fac_list, 74);
2473 if (MACHINE_HAS_TLB_GUEST) {
2474 set_kvm_facility(kvm->arch.model.fac_mask, 147);
2475 set_kvm_facility(kvm->arch.model.fac_list, 147);
2478 if (css_general_characteristics.aiv && test_facility(65))
2479 set_kvm_facility(kvm->arch.model.fac_mask, 65);
2481 kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
2482 kvm->arch.model.ibc = sclp.ibc & 0x0fff;
2484 kvm_s390_crypto_init(kvm);
2486 mutex_init(&kvm->arch.float_int.ais_lock);
2487 spin_lock_init(&kvm->arch.float_int.lock);
2488 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2489 INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
2490 init_waitqueue_head(&kvm->arch.ipte_wq);
2491 mutex_init(&kvm->arch.ipte_mutex);
2493 debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
2494 VM_EVENT(kvm, 3, "vm created with type %lu", type);
2496 if (type & KVM_VM_S390_UCONTROL) {
2497 kvm->arch.gmap = NULL;
2498 kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
2500 if (sclp.hamax == U64_MAX)
2501 kvm->arch.mem_limit = TASK_SIZE_MAX;
2503 kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX,
2505 kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
2506 if (!kvm->arch.gmap)
2508 kvm->arch.gmap->private = kvm;
2509 kvm->arch.gmap->pfault_enabled = 0;
2512 kvm->arch.use_pfmfi = sclp.has_pfmfi;
2513 kvm->arch.use_skf = sclp.has_skey;
2514 spin_lock_init(&kvm->arch.start_stop_lock);
2515 kvm_s390_vsie_init(kvm);
2516 kvm_s390_gisa_init(kvm);
2517 KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
2521 free_page((unsigned long)kvm->arch.sie_page2);
2522 debug_unregister(kvm->arch.dbf);
2524 KVM_EVENT(3, "creation of vm failed: %d", rc);
2528 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
2530 VCPU_EVENT(vcpu, 3, "%s", "free cpu");
2531 trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
2532 kvm_s390_clear_local_irqs(vcpu);
2533 kvm_clear_async_pf_completion_queue(vcpu);
2534 if (!kvm_is_ucontrol(vcpu->kvm))
2537 if (kvm_is_ucontrol(vcpu->kvm))
2538 gmap_remove(vcpu->arch.gmap);
2540 if (vcpu->kvm->arch.use_cmma)
2541 kvm_s390_vcpu_unsetup_cmma(vcpu);
2542 free_page((unsigned long)(vcpu->arch.sie_block));
2544 kvm_vcpu_uninit(vcpu);
2545 kmem_cache_free(kvm_vcpu_cache, vcpu);
2548 static void kvm_free_vcpus(struct kvm *kvm)
2551 struct kvm_vcpu *vcpu;
2553 kvm_for_each_vcpu(i, vcpu, kvm)
2554 kvm_arch_vcpu_destroy(vcpu);
2556 mutex_lock(&kvm->lock);
2557 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
2558 kvm->vcpus[i] = NULL;
2560 atomic_set(&kvm->online_vcpus, 0);
2561 mutex_unlock(&kvm->lock);
2564 void kvm_arch_destroy_vm(struct kvm *kvm)
2566 kvm_free_vcpus(kvm);
2568 debug_unregister(kvm->arch.dbf);
2569 kvm_s390_gisa_destroy(kvm);
2570 free_page((unsigned long)kvm->arch.sie_page2);
2571 if (!kvm_is_ucontrol(kvm))
2572 gmap_remove(kvm->arch.gmap);
2573 kvm_s390_destroy_adapters(kvm);
2574 kvm_s390_clear_float_irqs(kvm);
2575 kvm_s390_vsie_destroy(kvm);
2576 KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
2579 /* Section: vcpu related */
2580 static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
2582 vcpu->arch.gmap = gmap_create(current->mm, -1UL);
2583 if (!vcpu->arch.gmap)
2585 vcpu->arch.gmap->private = vcpu->kvm;
2590 static void sca_del_vcpu(struct kvm_vcpu *vcpu)
2592 if (!kvm_s390_use_sca_entries())
2594 read_lock(&vcpu->kvm->arch.sca_lock);
2595 if (vcpu->kvm->arch.use_esca) {
2596 struct esca_block *sca = vcpu->kvm->arch.sca;
2598 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
2599 sca->cpu[vcpu->vcpu_id].sda = 0;
2601 struct bsca_block *sca = vcpu->kvm->arch.sca;
2603 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
2604 sca->cpu[vcpu->vcpu_id].sda = 0;
2606 read_unlock(&vcpu->kvm->arch.sca_lock);
2609 static void sca_add_vcpu(struct kvm_vcpu *vcpu)
2611 if (!kvm_s390_use_sca_entries()) {
2612 struct bsca_block *sca = vcpu->kvm->arch.sca;
2614 /* we still need the basic sca for the ipte control */
2615 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2616 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
2619 read_lock(&vcpu->kvm->arch.sca_lock);
2620 if (vcpu->kvm->arch.use_esca) {
2621 struct esca_block *sca = vcpu->kvm->arch.sca;
2623 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
2624 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2625 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
2626 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
2627 set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
2629 struct bsca_block *sca = vcpu->kvm->arch.sca;
2631 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
2632 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2633 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
2634 set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
2636 read_unlock(&vcpu->kvm->arch.sca_lock);
2639 /* Basic SCA to Extended SCA data copy routines */
2640 static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
2643 d->sigp_ctrl.c = s->sigp_ctrl.c;
2644 d->sigp_ctrl.scn = s->sigp_ctrl.scn;
2647 static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
2651 d->ipte_control = s->ipte_control;
2653 for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
2654 sca_copy_entry(&d->cpu[i], &s->cpu[i]);
2657 static int sca_switch_to_extended(struct kvm *kvm)
2659 struct bsca_block *old_sca = kvm->arch.sca;
2660 struct esca_block *new_sca;
2661 struct kvm_vcpu *vcpu;
2662 unsigned int vcpu_idx;
2665 new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
2669 scaoh = (u32)((u64)(new_sca) >> 32);
2670 scaol = (u32)(u64)(new_sca) & ~0x3fU;
2672 kvm_s390_vcpu_block_all(kvm);
2673 write_lock(&kvm->arch.sca_lock);
2675 sca_copy_b_to_e(new_sca, old_sca);
2677 kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
2678 vcpu->arch.sie_block->scaoh = scaoh;
2679 vcpu->arch.sie_block->scaol = scaol;
2680 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
2682 kvm->arch.sca = new_sca;
2683 kvm->arch.use_esca = 1;
2685 write_unlock(&kvm->arch.sca_lock);
2686 kvm_s390_vcpu_unblock_all(kvm);
2688 free_page((unsigned long)old_sca);
2690 VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
2691 old_sca, kvm->arch.sca);
2695 static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
2699 if (!kvm_s390_use_sca_entries()) {
2700 if (id < KVM_MAX_VCPUS)
2704 if (id < KVM_S390_BSCA_CPU_SLOTS)
2706 if (!sclp.has_esca || !sclp.has_64bscao)
2709 mutex_lock(&kvm->lock);
2710 rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
2711 mutex_unlock(&kvm->lock);
2713 return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
2716 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
2718 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
2719 kvm_clear_async_pf_completion_queue(vcpu);
2720 vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
2726 kvm_s390_set_prefix(vcpu, 0);
2727 if (test_kvm_facility(vcpu->kvm, 64))
2728 vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
2729 if (test_kvm_facility(vcpu->kvm, 82))
2730 vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC;
2731 if (test_kvm_facility(vcpu->kvm, 133))
2732 vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
2733 if (test_kvm_facility(vcpu->kvm, 156))
2734 vcpu->run->kvm_valid_regs |= KVM_SYNC_ETOKEN;
2735 /* fprs can be synchronized via vrs, even if the guest has no vx. With
2736 * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
2739 vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
2741 vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
2743 if (kvm_is_ucontrol(vcpu->kvm))
2744 return __kvm_ucontrol_vcpu_init(vcpu);
2749 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2750 static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2752 WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
2753 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2754 vcpu->arch.cputm_start = get_tod_clock_fast();
2755 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2758 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2759 static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2761 WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
2762 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2763 vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
2764 vcpu->arch.cputm_start = 0;
2765 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2768 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2769 static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2771 WARN_ON_ONCE(vcpu->arch.cputm_enabled);
2772 vcpu->arch.cputm_enabled = true;
2773 __start_cpu_timer_accounting(vcpu);
2776 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2777 static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2779 WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
2780 __stop_cpu_timer_accounting(vcpu);
2781 vcpu->arch.cputm_enabled = false;
2784 static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2786 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2787 __enable_cpu_timer_accounting(vcpu);
2791 static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2793 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2794 __disable_cpu_timer_accounting(vcpu);
2798 /* set the cpu timer - may only be called from the VCPU thread itself */
2799 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
2801 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2802 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2803 if (vcpu->arch.cputm_enabled)
2804 vcpu->arch.cputm_start = get_tod_clock_fast();
2805 vcpu->arch.sie_block->cputm = cputm;
2806 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2810 /* update and get the cpu timer - can also be called from other VCPU threads */
2811 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
2816 if (unlikely(!vcpu->arch.cputm_enabled))
2817 return vcpu->arch.sie_block->cputm;
2819 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2821 seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
2823 * If the writer would ever execute a read in the critical
2824 * section, e.g. in irq context, we have a deadlock.
2826 WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu);
2827 value = vcpu->arch.sie_block->cputm;
2828 /* if cputm_start is 0, accounting is being started/stopped */
2829 if (likely(vcpu->arch.cputm_start))
2830 value -= get_tod_clock_fast() - vcpu->arch.cputm_start;
2831 } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1));
2836 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2839 gmap_enable(vcpu->arch.enabled_gmap);
2840 kvm_s390_set_cpuflags(vcpu, CPUSTAT_RUNNING);
2841 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
2842 __start_cpu_timer_accounting(vcpu);
2846 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
2849 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
2850 __stop_cpu_timer_accounting(vcpu);
2851 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING);
2852 vcpu->arch.enabled_gmap = gmap_get_enabled();
2853 gmap_disable(vcpu->arch.enabled_gmap);
2857 static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
2859 /* this equals initial cpu reset in pop, but we don't switch to ESA */
2860 vcpu->arch.sie_block->gpsw.mask = 0UL;
2861 vcpu->arch.sie_block->gpsw.addr = 0UL;
2862 kvm_s390_set_prefix(vcpu, 0);
2863 kvm_s390_set_cpu_timer(vcpu, 0);
2864 vcpu->arch.sie_block->ckc = 0UL;
2865 vcpu->arch.sie_block->todpr = 0;
2866 memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
2867 vcpu->arch.sie_block->gcr[0] = CR0_UNUSED_56 |
2868 CR0_INTERRUPT_KEY_SUBMASK |
2869 CR0_MEASUREMENT_ALERT_SUBMASK;
2870 vcpu->arch.sie_block->gcr[14] = CR14_UNUSED_32 |
2872 CR14_EXTERNAL_DAMAGE_SUBMASK;
2873 vcpu->run->s.regs.fpc = 0;
2874 vcpu->arch.sie_block->gbea = 1;
2875 vcpu->arch.sie_block->pp = 0;
2876 vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
2877 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
2878 kvm_clear_async_pf_completion_queue(vcpu);
2879 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
2880 kvm_s390_vcpu_stop(vcpu);
2881 kvm_s390_clear_local_irqs(vcpu);
2884 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
2886 mutex_lock(&vcpu->kvm->lock);
2888 vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch;
2889 vcpu->arch.sie_block->epdx = vcpu->kvm->arch.epdx;
2891 mutex_unlock(&vcpu->kvm->lock);
2892 if (!kvm_is_ucontrol(vcpu->kvm)) {
2893 vcpu->arch.gmap = vcpu->kvm->arch.gmap;
2896 if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0)
2897 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
2898 /* make vcpu_load load the right gmap on the first trigger */
2899 vcpu->arch.enabled_gmap = vcpu->arch.gmap;
2902 static bool kvm_has_pckmo_subfunc(struct kvm *kvm, unsigned long nr)
2904 if (test_bit_inv(nr, (unsigned long *)&kvm->arch.model.subfuncs.pckmo) &&
2905 test_bit_inv(nr, (unsigned long *)&kvm_s390_available_subfunc.pckmo))
2910 static bool kvm_has_pckmo_ecc(struct kvm *kvm)
2912 /* At least one ECC subfunction must be present */
2913 return kvm_has_pckmo_subfunc(kvm, 32) ||
2914 kvm_has_pckmo_subfunc(kvm, 33) ||
2915 kvm_has_pckmo_subfunc(kvm, 34) ||
2916 kvm_has_pckmo_subfunc(kvm, 40) ||
2917 kvm_has_pckmo_subfunc(kvm, 41);
2921 static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu)
2924 * If the AP instructions are not being interpreted and the MSAX3
2925 * facility is not configured for the guest, there is nothing to set up.
2927 if (!vcpu->kvm->arch.crypto.apie && !test_kvm_facility(vcpu->kvm, 76))
2930 vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd;
2931 vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA);
2932 vcpu->arch.sie_block->eca &= ~ECA_APIE;
2933 vcpu->arch.sie_block->ecd &= ~ECD_ECC;
2935 if (vcpu->kvm->arch.crypto.apie)
2936 vcpu->arch.sie_block->eca |= ECA_APIE;
2938 /* Set up protected key support */
2939 if (vcpu->kvm->arch.crypto.aes_kw) {
2940 vcpu->arch.sie_block->ecb3 |= ECB3_AES;
2941 /* ecc is also wrapped with AES key */
2942 if (kvm_has_pckmo_ecc(vcpu->kvm))
2943 vcpu->arch.sie_block->ecd |= ECD_ECC;
2946 if (vcpu->kvm->arch.crypto.dea_kw)
2947 vcpu->arch.sie_block->ecb3 |= ECB3_DEA;
2950 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
2952 free_page(vcpu->arch.sie_block->cbrlo);
2953 vcpu->arch.sie_block->cbrlo = 0;
2956 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
2958 vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
2959 if (!vcpu->arch.sie_block->cbrlo)
2964 static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu)
2966 struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model;
2968 vcpu->arch.sie_block->ibc = model->ibc;
2969 if (test_kvm_facility(vcpu->kvm, 7))
2970 vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list;
2973 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
2977 atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
2981 if (test_kvm_facility(vcpu->kvm, 78))
2982 kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED2);
2983 else if (test_kvm_facility(vcpu->kvm, 8))
2984 kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED);
2986 kvm_s390_vcpu_setup_model(vcpu);
2988 /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */
2989 if (MACHINE_HAS_ESOP)
2990 vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT;
2991 if (test_kvm_facility(vcpu->kvm, 9))
2992 vcpu->arch.sie_block->ecb |= ECB_SRSI;
2993 if (test_kvm_facility(vcpu->kvm, 73))
2994 vcpu->arch.sie_block->ecb |= ECB_TE;
2996 if (test_kvm_facility(vcpu->kvm, 8) && vcpu->kvm->arch.use_pfmfi)
2997 vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI;
2998 if (test_kvm_facility(vcpu->kvm, 130))
2999 vcpu->arch.sie_block->ecb2 |= ECB2_IEP;
3000 vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI;
3002 vcpu->arch.sie_block->eca |= ECA_CEI;
3004 vcpu->arch.sie_block->eca |= ECA_IB;
3006 vcpu->arch.sie_block->eca |= ECA_SII;
3007 if (sclp.has_sigpif)
3008 vcpu->arch.sie_block->eca |= ECA_SIGPI;
3009 if (test_kvm_facility(vcpu->kvm, 129)) {
3010 vcpu->arch.sie_block->eca |= ECA_VX;
3011 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
3013 if (test_kvm_facility(vcpu->kvm, 139))
3014 vcpu->arch.sie_block->ecd |= ECD_MEF;
3015 if (test_kvm_facility(vcpu->kvm, 156))
3016 vcpu->arch.sie_block->ecd |= ECD_ETOKENF;
3017 if (vcpu->arch.sie_block->gd) {
3018 vcpu->arch.sie_block->eca |= ECA_AIV;
3019 VCPU_EVENT(vcpu, 3, "AIV gisa format-%u enabled for cpu %03u",
3020 vcpu->arch.sie_block->gd & 0x3, vcpu->vcpu_id);
3022 vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
3024 vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
3027 kvm_s390_set_cpuflags(vcpu, CPUSTAT_KSS);
3029 vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
3031 if (vcpu->kvm->arch.use_cmma) {
3032 rc = kvm_s390_vcpu_setup_cmma(vcpu);
3036 hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
3037 vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
3039 vcpu->arch.sie_block->hpid = HPID_KVM;
3041 kvm_s390_vcpu_crypto_setup(vcpu);
3046 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
3049 struct kvm_vcpu *vcpu;
3050 struct sie_page *sie_page;
3053 if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id))
3058 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
3062 BUILD_BUG_ON(sizeof(struct sie_page) != 4096);
3063 sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
3067 vcpu->arch.sie_block = &sie_page->sie_block;
3068 vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb;
3070 /* the real guest size will always be smaller than msl */
3071 vcpu->arch.sie_block->mso = 0;
3072 vcpu->arch.sie_block->msl = sclp.hamax;
3074 vcpu->arch.sie_block->icpua = id;
3075 spin_lock_init(&vcpu->arch.local_int.lock);
3076 vcpu->arch.sie_block->gd = (u32)(u64)kvm->arch.gisa_int.origin;
3077 if (vcpu->arch.sie_block->gd && sclp.has_gisaf)
3078 vcpu->arch.sie_block->gd |= GISA_FORMAT1;
3079 seqcount_init(&vcpu->arch.cputm_seqcount);
3081 rc = kvm_vcpu_init(vcpu, kvm, id);
3083 goto out_free_sie_block;
3084 VM_EVENT(kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", id, vcpu,
3085 vcpu->arch.sie_block);
3086 trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block);
3090 free_page((unsigned long)(vcpu->arch.sie_block));
3092 kmem_cache_free(kvm_vcpu_cache, vcpu);
3097 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
3099 clear_bit(vcpu->vcpu_idx, vcpu->kvm->arch.gisa_int.kicked_mask);
3100 return kvm_s390_vcpu_has_irq(vcpu, 0);
3103 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
3105 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
3108 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
3110 atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
3114 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
3116 atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
3119 static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
3121 atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
3125 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu)
3127 return atomic_read(&vcpu->arch.sie_block->prog20) &
3128 (PROG_BLOCK_SIE | PROG_REQUEST);
3131 static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
3133 atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
3137 * Kick a guest cpu out of (v)SIE and wait until (v)SIE is not running.
3138 * If the CPU is not running (e.g. waiting as idle) the function will
3139 * return immediately. */
3140 void exit_sie(struct kvm_vcpu *vcpu)
3142 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
3143 kvm_s390_vsie_kick(vcpu);
3144 while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
3148 /* Kick a guest cpu out of SIE to process a request synchronously */
3149 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
3151 kvm_make_request(req, vcpu);
3152 kvm_s390_vcpu_request(vcpu);
3155 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
3158 struct kvm *kvm = gmap->private;
3159 struct kvm_vcpu *vcpu;
3160 unsigned long prefix;
3163 if (gmap_is_shadow(gmap))
3165 if (start >= 1UL << 31)
3166 /* We are only interested in prefix pages */
3168 kvm_for_each_vcpu(i, vcpu, kvm) {
3169 /* match against both prefix pages */
3170 prefix = kvm_s390_get_prefix(vcpu);
3171 if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
3172 VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
3174 kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
3179 bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
3181 /* do not poll with more than halt_poll_max_steal percent of steal time */
3182 if (S390_lowcore.avg_steal_timer * 100 / (TICK_USEC << 12) >=
3183 halt_poll_max_steal) {
3184 vcpu->stat.halt_no_poll_steal++;
3190 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
3192 /* kvm common code refers to this, but never calls it */
3197 static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
3198 struct kvm_one_reg *reg)
3203 case KVM_REG_S390_TODPR:
3204 r = put_user(vcpu->arch.sie_block->todpr,
3205 (u32 __user *)reg->addr);
3207 case KVM_REG_S390_EPOCHDIFF:
3208 r = put_user(vcpu->arch.sie_block->epoch,
3209 (u64 __user *)reg->addr);
3211 case KVM_REG_S390_CPU_TIMER:
3212 r = put_user(kvm_s390_get_cpu_timer(vcpu),
3213 (u64 __user *)reg->addr);
3215 case KVM_REG_S390_CLOCK_COMP:
3216 r = put_user(vcpu->arch.sie_block->ckc,
3217 (u64 __user *)reg->addr);
3219 case KVM_REG_S390_PFTOKEN:
3220 r = put_user(vcpu->arch.pfault_token,
3221 (u64 __user *)reg->addr);
3223 case KVM_REG_S390_PFCOMPARE:
3224 r = put_user(vcpu->arch.pfault_compare,
3225 (u64 __user *)reg->addr);
3227 case KVM_REG_S390_PFSELECT:
3228 r = put_user(vcpu->arch.pfault_select,
3229 (u64 __user *)reg->addr);
3231 case KVM_REG_S390_PP:
3232 r = put_user(vcpu->arch.sie_block->pp,
3233 (u64 __user *)reg->addr);
3235 case KVM_REG_S390_GBEA:
3236 r = put_user(vcpu->arch.sie_block->gbea,
3237 (u64 __user *)reg->addr);
3246 static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
3247 struct kvm_one_reg *reg)
3253 case KVM_REG_S390_TODPR:
3254 r = get_user(vcpu->arch.sie_block->todpr,
3255 (u32 __user *)reg->addr);
3257 case KVM_REG_S390_EPOCHDIFF:
3258 r = get_user(vcpu->arch.sie_block->epoch,
3259 (u64 __user *)reg->addr);
3261 case KVM_REG_S390_CPU_TIMER:
3262 r = get_user(val, (u64 __user *)reg->addr);
3264 kvm_s390_set_cpu_timer(vcpu, val);
3266 case KVM_REG_S390_CLOCK_COMP:
3267 r = get_user(vcpu->arch.sie_block->ckc,
3268 (u64 __user *)reg->addr);
3270 case KVM_REG_S390_PFTOKEN:
3271 r = get_user(vcpu->arch.pfault_token,
3272 (u64 __user *)reg->addr);
3273 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3274 kvm_clear_async_pf_completion_queue(vcpu);
3276 case KVM_REG_S390_PFCOMPARE:
3277 r = get_user(vcpu->arch.pfault_compare,
3278 (u64 __user *)reg->addr);
3280 case KVM_REG_S390_PFSELECT:
3281 r = get_user(vcpu->arch.pfault_select,
3282 (u64 __user *)reg->addr);
3284 case KVM_REG_S390_PP:
3285 r = get_user(vcpu->arch.sie_block->pp,
3286 (u64 __user *)reg->addr);
3288 case KVM_REG_S390_GBEA:
3289 r = get_user(vcpu->arch.sie_block->gbea,
3290 (u64 __user *)reg->addr);
3299 static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
3301 kvm_s390_vcpu_initial_reset(vcpu);
3305 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3308 memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs));
3313 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3316 memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
3321 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
3322 struct kvm_sregs *sregs)
3326 memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
3327 memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
3333 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
3334 struct kvm_sregs *sregs)
3338 memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
3339 memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
3345 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3351 vcpu->run->s.regs.fpc = fpu->fpc;
3353 convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
3354 (freg_t *) fpu->fprs);
3356 memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
3362 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3366 /* make sure we have the latest values */
3369 convert_vx_to_fp((freg_t *) fpu->fprs,
3370 (__vector128 *) vcpu->run->s.regs.vrs);
3372 memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
3373 fpu->fpc = vcpu->run->s.regs.fpc;
3379 static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
3383 if (!is_vcpu_stopped(vcpu))
3386 vcpu->run->psw_mask = psw.mask;
3387 vcpu->run->psw_addr = psw.addr;
3392 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
3393 struct kvm_translation *tr)
3395 return -EINVAL; /* not implemented yet */
3398 #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
3399 KVM_GUESTDBG_USE_HW_BP | \
3400 KVM_GUESTDBG_ENABLE)
3402 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
3403 struct kvm_guest_debug *dbg)
3409 vcpu->guest_debug = 0;
3410 kvm_s390_clear_bp_data(vcpu);
3412 if (dbg->control & ~VALID_GUESTDBG_FLAGS) {
3416 if (!sclp.has_gpere) {
3421 if (dbg->control & KVM_GUESTDBG_ENABLE) {
3422 vcpu->guest_debug = dbg->control;
3423 /* enforce guest PER */
3424 kvm_s390_set_cpuflags(vcpu, CPUSTAT_P);
3426 if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
3427 rc = kvm_s390_import_bp_data(vcpu, dbg);
3429 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
3430 vcpu->arch.guestdbg.last_bp = 0;
3434 vcpu->guest_debug = 0;
3435 kvm_s390_clear_bp_data(vcpu);
3436 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
3444 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
3445 struct kvm_mp_state *mp_state)
3451 /* CHECK_STOP and LOAD are not supported yet */
3452 ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
3453 KVM_MP_STATE_OPERATING;
3459 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
3460 struct kvm_mp_state *mp_state)
3466 /* user space knows about this interface - let it control the state */
3467 vcpu->kvm->arch.user_cpu_state_ctrl = 1;
3469 switch (mp_state->mp_state) {
3470 case KVM_MP_STATE_STOPPED:
3471 kvm_s390_vcpu_stop(vcpu);
3473 case KVM_MP_STATE_OPERATING:
3474 kvm_s390_vcpu_start(vcpu);
3476 case KVM_MP_STATE_LOAD:
3477 case KVM_MP_STATE_CHECK_STOP:
3478 /* fall through - CHECK_STOP and LOAD are not supported yet */
3487 static bool ibs_enabled(struct kvm_vcpu *vcpu)
3489 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_IBS);
3492 static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
3495 kvm_s390_vcpu_request_handled(vcpu);
3496 if (!kvm_request_pending(vcpu))
3499 * We use MMU_RELOAD just to re-arm the ipte notifier for the
3500 * guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
3501 * This ensures that the ipte instruction for this request has
3502 * already finished. We might race against a second unmapper that
3503 * wants to set the blocking bit. Lets just retry the request loop.
3505 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
3507 rc = gmap_mprotect_notify(vcpu->arch.gmap,
3508 kvm_s390_get_prefix(vcpu),
3509 PAGE_SIZE * 2, PROT_WRITE);
3511 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
3517 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
3518 vcpu->arch.sie_block->ihcpu = 0xffff;
3522 if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
3523 if (!ibs_enabled(vcpu)) {
3524 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
3525 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IBS);
3530 if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
3531 if (ibs_enabled(vcpu)) {
3532 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
3533 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IBS);
3538 if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
3539 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
3543 if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) {
3545 * Disable CMM virtualization; we will emulate the ESSA
3546 * instruction manually, in order to provide additional
3547 * functionalities needed for live migration.
3549 vcpu->arch.sie_block->ecb2 &= ~ECB2_CMMA;
3553 if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) {
3555 * Re-enable CMM virtualization if CMMA is available and
3556 * CMM has been used.
3558 if ((vcpu->kvm->arch.use_cmma) &&
3559 (vcpu->kvm->mm->context.uses_cmm))
3560 vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
3564 /* nothing to do, just clear the request */
3565 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
3566 /* we left the vsie handler, nothing to do, just clear the request */
3567 kvm_clear_request(KVM_REQ_VSIE_RESTART, vcpu);
3572 void kvm_s390_set_tod_clock(struct kvm *kvm,
3573 const struct kvm_s390_vm_tod_clock *gtod)
3575 struct kvm_vcpu *vcpu;
3576 struct kvm_s390_tod_clock_ext htod;
3579 mutex_lock(&kvm->lock);
3582 get_tod_clock_ext((char *)&htod);
3584 kvm->arch.epoch = gtod->tod - htod.tod;
3586 if (test_kvm_facility(kvm, 139)) {
3587 kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
3588 if (kvm->arch.epoch > gtod->tod)
3589 kvm->arch.epdx -= 1;
3592 kvm_s390_vcpu_block_all(kvm);
3593 kvm_for_each_vcpu(i, vcpu, kvm) {
3594 vcpu->arch.sie_block->epoch = kvm->arch.epoch;
3595 vcpu->arch.sie_block->epdx = kvm->arch.epdx;
3598 kvm_s390_vcpu_unblock_all(kvm);
3600 mutex_unlock(&kvm->lock);
3604 * kvm_arch_fault_in_page - fault-in guest page if necessary
3605 * @vcpu: The corresponding virtual cpu
3606 * @gpa: Guest physical address
3607 * @writable: Whether the page should be writable or not
3609 * Make sure that a guest page has been faulted-in on the host.
3611 * Return: Zero on success, negative error code otherwise.
3613 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
3615 return gmap_fault(vcpu->arch.gmap, gpa,
3616 writable ? FAULT_FLAG_WRITE : 0);
3619 static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
3620 unsigned long token)
3622 struct kvm_s390_interrupt inti;
3623 struct kvm_s390_irq irq;
3626 irq.u.ext.ext_params2 = token;
3627 irq.type = KVM_S390_INT_PFAULT_INIT;
3628 WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
3630 inti.type = KVM_S390_INT_PFAULT_DONE;
3631 inti.parm64 = token;
3632 WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
3636 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
3637 struct kvm_async_pf *work)
3639 trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
3640 __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
3643 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
3644 struct kvm_async_pf *work)
3646 trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
3647 __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
3650 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
3651 struct kvm_async_pf *work)
3653 /* s390 will always inject the page directly */
3656 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
3659 * s390 will always inject the page directly,
3660 * but we still want check_async_completion to cleanup
3665 static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
3668 struct kvm_arch_async_pf arch;
3671 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3673 if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
3674 vcpu->arch.pfault_compare)
3676 if (psw_extint_disabled(vcpu))
3678 if (kvm_s390_vcpu_has_irq(vcpu, 0))
3680 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK))
3682 if (!vcpu->arch.gmap->pfault_enabled)
3685 hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
3686 hva += current->thread.gmap_addr & ~PAGE_MASK;
3687 if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
3690 rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
3694 static int vcpu_pre_run(struct kvm_vcpu *vcpu)
3699 * On s390 notifications for arriving pages will be delivered directly
3700 * to the guest but the house keeping for completed pfaults is
3701 * handled outside the worker.
3703 kvm_check_async_pf_completion(vcpu);
3705 vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
3706 vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
3711 if (test_cpu_flag(CIF_MCCK_PENDING))
3714 if (!kvm_is_ucontrol(vcpu->kvm)) {
3715 rc = kvm_s390_deliver_pending_interrupts(vcpu);
3720 rc = kvm_s390_handle_requests(vcpu);
3724 if (guestdbg_enabled(vcpu)) {
3725 kvm_s390_backup_guest_per_regs(vcpu);
3726 kvm_s390_patch_guest_per_regs(vcpu);
3729 clear_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.gisa_int.kicked_mask);
3731 vcpu->arch.sie_block->icptcode = 0;
3732 cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
3733 VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
3734 trace_kvm_s390_sie_enter(vcpu, cpuflags);
3739 static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
3741 struct kvm_s390_pgm_info pgm_info = {
3742 .code = PGM_ADDRESSING,
3747 VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
3748 trace_kvm_s390_sie_fault(vcpu);
3751 * We want to inject an addressing exception, which is defined as a
3752 * suppressing or terminating exception. However, since we came here
3753 * by a DAT access exception, the PSW still points to the faulting
3754 * instruction since DAT exceptions are nullifying. So we've got
3755 * to look up the current opcode to get the length of the instruction
3756 * to be able to forward the PSW.
3758 rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
3759 ilen = insn_length(opcode);
3763 /* Instruction-Fetching Exceptions - we can't detect the ilen.
3764 * Forward by arbitrary ilc, injection will take care of
3765 * nullification if necessary.
3767 pgm_info = vcpu->arch.pgm;
3770 pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
3771 kvm_s390_forward_psw(vcpu, ilen);
3772 return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
3775 static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
3777 struct mcck_volatile_info *mcck_info;
3778 struct sie_page *sie_page;
3780 VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
3781 vcpu->arch.sie_block->icptcode);
3782 trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
3784 if (guestdbg_enabled(vcpu))
3785 kvm_s390_restore_guest_per_regs(vcpu);
3787 vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
3788 vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
3790 if (exit_reason == -EINTR) {
3791 VCPU_EVENT(vcpu, 3, "%s", "machine check");
3792 sie_page = container_of(vcpu->arch.sie_block,
3793 struct sie_page, sie_block);
3794 mcck_info = &sie_page->mcck_info;
3795 kvm_s390_reinject_machine_check(vcpu, mcck_info);
3799 if (vcpu->arch.sie_block->icptcode > 0) {
3800 int rc = kvm_handle_sie_intercept(vcpu);
3802 if (rc != -EOPNOTSUPP)
3804 vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
3805 vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
3806 vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
3807 vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
3809 } else if (exit_reason != -EFAULT) {
3810 vcpu->stat.exit_null++;
3812 } else if (kvm_is_ucontrol(vcpu->kvm)) {
3813 vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
3814 vcpu->run->s390_ucontrol.trans_exc_code =
3815 current->thread.gmap_addr;
3816 vcpu->run->s390_ucontrol.pgm_code = 0x10;
3818 } else if (current->thread.gmap_pfault) {
3819 trace_kvm_s390_major_guest_pfault(vcpu);
3820 current->thread.gmap_pfault = 0;
3821 if (kvm_arch_setup_async_pf(vcpu))
3823 return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
3825 return vcpu_post_run_fault_in_sie(vcpu);
3828 static int __vcpu_run(struct kvm_vcpu *vcpu)
3830 int rc, exit_reason;
3833 * We try to hold kvm->srcu during most of vcpu_run (except when run-
3834 * ning the guest), so that memslots (and other stuff) are protected
3836 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3839 rc = vcpu_pre_run(vcpu);
3843 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
3845 * As PF_VCPU will be used in fault handler, between
3846 * guest_enter and guest_exit should be no uaccess.
3848 local_irq_disable();
3849 guest_enter_irqoff();
3850 __disable_cpu_timer_accounting(vcpu);
3852 exit_reason = sie64a(vcpu->arch.sie_block,
3853 vcpu->run->s.regs.gprs);
3854 local_irq_disable();
3855 __enable_cpu_timer_accounting(vcpu);
3856 guest_exit_irqoff();
3858 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3860 rc = vcpu_post_run(vcpu, exit_reason);
3861 } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
3863 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
3867 static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
3869 struct runtime_instr_cb *riccb;
3872 riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
3873 gscb = (struct gs_cb *) &kvm_run->s.regs.gscb;
3874 vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
3875 vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
3876 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
3877 kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
3878 if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
3879 memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
3880 /* some control register changes require a tlb flush */
3881 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
3883 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
3884 kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
3885 vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
3886 vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
3887 vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
3888 vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
3890 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
3891 vcpu->arch.pfault_token = kvm_run->s.regs.pft;
3892 vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
3893 vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
3894 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3895 kvm_clear_async_pf_completion_queue(vcpu);
3898 * If userspace sets the riccb (e.g. after migration) to a valid state,
3899 * we should enable RI here instead of doing the lazy enablement.
3901 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
3902 test_kvm_facility(vcpu->kvm, 64) &&
3904 !(vcpu->arch.sie_block->ecb3 & ECB3_RI)) {
3905 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
3906 vcpu->arch.sie_block->ecb3 |= ECB3_RI;
3909 * If userspace sets the gscb (e.g. after migration) to non-zero,
3910 * we should enable GS here instead of doing the lazy enablement.
3912 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) &&
3913 test_kvm_facility(vcpu->kvm, 133) &&
3915 !vcpu->arch.gs_enabled) {
3916 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)");
3917 vcpu->arch.sie_block->ecb |= ECB_GS;
3918 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
3919 vcpu->arch.gs_enabled = 1;
3921 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_BPBC) &&
3922 test_kvm_facility(vcpu->kvm, 82)) {
3923 vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
3924 vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0;
3926 save_access_regs(vcpu->arch.host_acrs);
3927 restore_access_regs(vcpu->run->s.regs.acrs);
3928 /* save host (userspace) fprs/vrs */
3930 vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
3931 vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
3933 current->thread.fpu.regs = vcpu->run->s.regs.vrs;
3935 current->thread.fpu.regs = vcpu->run->s.regs.fprs;
3936 current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
3937 if (test_fp_ctl(current->thread.fpu.fpc))
3938 /* User space provided an invalid FPC, let's clear it */
3939 current->thread.fpu.fpc = 0;
3940 if (MACHINE_HAS_GS) {
3942 __ctl_set_bit(2, 4);
3943 if (current->thread.gs_cb) {
3944 vcpu->arch.host_gscb = current->thread.gs_cb;
3945 save_gs_cb(vcpu->arch.host_gscb);
3947 if (vcpu->arch.gs_enabled) {
3948 current->thread.gs_cb = (struct gs_cb *)
3949 &vcpu->run->s.regs.gscb;
3950 restore_gs_cb(current->thread.gs_cb);
3954 /* SIE will load etoken directly from SDNX and therefore kvm_run */
3956 kvm_run->kvm_dirty_regs = 0;
3959 static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
3961 kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
3962 kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
3963 kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
3964 memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
3965 kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
3966 kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
3967 kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
3968 kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
3969 kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
3970 kvm_run->s.regs.pft = vcpu->arch.pfault_token;
3971 kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
3972 kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
3973 kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC;
3974 save_access_regs(vcpu->run->s.regs.acrs);
3975 restore_access_regs(vcpu->arch.host_acrs);
3976 /* Save guest register state */
3978 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
3979 /* Restore will be done lazily at return */
3980 current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
3981 current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
3982 if (MACHINE_HAS_GS) {
3984 __ctl_set_bit(2, 4);
3985 if (vcpu->arch.gs_enabled)
3986 save_gs_cb(current->thread.gs_cb);
3987 current->thread.gs_cb = vcpu->arch.host_gscb;
3988 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;
3994 /* SIE will save etoken directly into SDNX and therefore kvm_run */
3997 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4001 if (kvm_run->immediate_exit)
4004 if (kvm_run->kvm_valid_regs & ~KVM_SYNC_S390_VALID_FIELDS ||
4005 kvm_run->kvm_dirty_regs & ~KVM_SYNC_S390_VALID_FIELDS)
4010 if (guestdbg_exit_pending(vcpu)) {
4011 kvm_s390_prepare_debug_exit(vcpu);
4016 kvm_sigset_activate(vcpu);
4018 if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) {
4019 kvm_s390_vcpu_start(vcpu);
4020 } else if (is_vcpu_stopped(vcpu)) {
4021 pr_err_ratelimited("can't run stopped vcpu %d\n",
4027 sync_regs(vcpu, kvm_run);
4028 enable_cpu_timer_accounting(vcpu);
4031 rc = __vcpu_run(vcpu);
4033 if (signal_pending(current) && !rc) {
4034 kvm_run->exit_reason = KVM_EXIT_INTR;
4038 if (guestdbg_exit_pending(vcpu) && !rc) {
4039 kvm_s390_prepare_debug_exit(vcpu);
4043 if (rc == -EREMOTE) {
4044 /* userspace support is needed, kvm_run has been prepared */
4048 disable_cpu_timer_accounting(vcpu);
4049 store_regs(vcpu, kvm_run);
4051 kvm_sigset_deactivate(vcpu);
4053 vcpu->stat.exit_userspace++;
4060 * store status at address
4061 * we use have two special cases:
4062 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
4063 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
4065 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
4067 unsigned char archmode = 1;
4068 freg_t fprs[NUM_FPRS];
4073 px = kvm_s390_get_prefix(vcpu);
4074 if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
4075 if (write_guest_abs(vcpu, 163, &archmode, 1))
4078 } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
4079 if (write_guest_real(vcpu, 163, &archmode, 1))
4083 gpa -= __LC_FPREGS_SAVE_AREA;
4085 /* manually convert vector registers if necessary */
4086 if (MACHINE_HAS_VX) {
4087 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
4088 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
4091 rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
4092 vcpu->run->s.regs.fprs, 128);
4094 rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA,
4095 vcpu->run->s.regs.gprs, 128);
4096 rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA,
4097 &vcpu->arch.sie_block->gpsw, 16);
4098 rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA,
4100 rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA,
4101 &vcpu->run->s.regs.fpc, 4);
4102 rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA,
4103 &vcpu->arch.sie_block->todpr, 4);
4104 cputm = kvm_s390_get_cpu_timer(vcpu);
4105 rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA,
4107 clkcomp = vcpu->arch.sie_block->ckc >> 8;
4108 rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA,
4110 rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA,
4111 &vcpu->run->s.regs.acrs, 64);
4112 rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA,
4113 &vcpu->arch.sie_block->gcr, 128);
4114 return rc ? -EFAULT : 0;
4117 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
4120 * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
4121 * switch in the run ioctl. Let's update our copies before we save
4122 * it into the save area
4125 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
4126 save_access_regs(vcpu->run->s.regs.acrs);
4128 return kvm_s390_store_status_unloaded(vcpu, addr);
4131 static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
4133 kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
4134 kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu);
4137 static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
4140 struct kvm_vcpu *vcpu;
4142 kvm_for_each_vcpu(i, vcpu, kvm) {
4143 __disable_ibs_on_vcpu(vcpu);
4147 static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
4151 kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
4152 kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu);
4155 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
4157 int i, online_vcpus, started_vcpus = 0;
4159 if (!is_vcpu_stopped(vcpu))
4162 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
4163 /* Only one cpu at a time may enter/leave the STOPPED state. */
4164 spin_lock(&vcpu->kvm->arch.start_stop_lock);
4165 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
4167 for (i = 0; i < online_vcpus; i++) {
4168 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
4172 if (started_vcpus == 0) {
4173 /* we're the only active VCPU -> speed it up */
4174 __enable_ibs_on_vcpu(vcpu);
4175 } else if (started_vcpus == 1) {
4177 * As we are starting a second VCPU, we have to disable
4178 * the IBS facility on all VCPUs to remove potentially
4179 * oustanding ENABLE requests.
4181 __disable_ibs_on_all_vcpus(vcpu->kvm);
4184 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_STOPPED);
4186 * Another VCPU might have used IBS while we were offline.
4187 * Let's play safe and flush the VCPU at startup.
4189 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
4190 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4194 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
4196 int i, online_vcpus, started_vcpus = 0;
4197 struct kvm_vcpu *started_vcpu = NULL;
4199 if (is_vcpu_stopped(vcpu))
4202 trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
4203 /* Only one cpu at a time may enter/leave the STOPPED state. */
4204 spin_lock(&vcpu->kvm->arch.start_stop_lock);
4205 online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
4208 * Set the VCPU to STOPPED and THEN clear the interrupt flag,
4209 * now that the SIGP STOP and SIGP STOP AND STORE STATUS orders
4210 * have been fully processed. This will ensure that the VCPU
4211 * is kept BUSY if another VCPU is inquiring with SIGP SENSE.
4213 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOPPED);
4214 kvm_s390_clear_stop_irq(vcpu);
4216 __disable_ibs_on_vcpu(vcpu);
4218 for (i = 0; i < online_vcpus; i++) {
4219 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
4221 started_vcpu = vcpu->kvm->vcpus[i];
4225 if (started_vcpus == 1) {
4227 * As we only have one VCPU left, we want to enable the
4228 * IBS facility for that VCPU to speed it up.
4230 __enable_ibs_on_vcpu(started_vcpu);
4233 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4237 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
4238 struct kvm_enable_cap *cap)
4246 case KVM_CAP_S390_CSS_SUPPORT:
4247 if (!vcpu->kvm->arch.css_support) {
4248 vcpu->kvm->arch.css_support = 1;
4249 VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
4250 trace_kvm_s390_enable_css(vcpu->kvm);
4261 static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
4262 struct kvm_s390_mem_op *mop)
4264 void __user *uaddr = (void __user *)mop->buf;
4265 void *tmpbuf = NULL;
4267 const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
4268 | KVM_S390_MEMOP_F_CHECK_ONLY;
4270 if (mop->flags & ~supported_flags || mop->ar >= NUM_ACRS || !mop->size)
4273 if (mop->size > MEM_OP_MAX_SIZE)
4276 if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
4277 tmpbuf = vmalloc(mop->size);
4282 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4285 case KVM_S390_MEMOP_LOGICAL_READ:
4286 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
4287 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4288 mop->size, GACC_FETCH);
4291 r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4293 if (copy_to_user(uaddr, tmpbuf, mop->size))
4297 case KVM_S390_MEMOP_LOGICAL_WRITE:
4298 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
4299 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4300 mop->size, GACC_STORE);
4303 if (copy_from_user(tmpbuf, uaddr, mop->size)) {
4307 r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4313 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
4315 if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
4316 kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
4322 long kvm_arch_vcpu_async_ioctl(struct file *filp,
4323 unsigned int ioctl, unsigned long arg)
4325 struct kvm_vcpu *vcpu = filp->private_data;
4326 void __user *argp = (void __user *)arg;
4329 case KVM_S390_IRQ: {
4330 struct kvm_s390_irq s390irq;
4332 if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
4334 return kvm_s390_inject_vcpu(vcpu, &s390irq);
4336 case KVM_S390_INTERRUPT: {
4337 struct kvm_s390_interrupt s390int;
4338 struct kvm_s390_irq s390irq = {};
4340 if (copy_from_user(&s390int, argp, sizeof(s390int)))
4342 if (s390int_to_s390irq(&s390int, &s390irq))
4344 return kvm_s390_inject_vcpu(vcpu, &s390irq);
4347 return -ENOIOCTLCMD;
4350 long kvm_arch_vcpu_ioctl(struct file *filp,
4351 unsigned int ioctl, unsigned long arg)
4353 struct kvm_vcpu *vcpu = filp->private_data;
4354 void __user *argp = (void __user *)arg;
4361 case KVM_S390_STORE_STATUS:
4362 idx = srcu_read_lock(&vcpu->kvm->srcu);
4363 r = kvm_s390_store_status_unloaded(vcpu, arg);
4364 srcu_read_unlock(&vcpu->kvm->srcu, idx);
4366 case KVM_S390_SET_INITIAL_PSW: {
4370 if (copy_from_user(&psw, argp, sizeof(psw)))
4372 r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
4375 case KVM_S390_INITIAL_RESET:
4376 r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
4378 case KVM_SET_ONE_REG:
4379 case KVM_GET_ONE_REG: {
4380 struct kvm_one_reg reg;
4382 if (copy_from_user(®, argp, sizeof(reg)))
4384 if (ioctl == KVM_SET_ONE_REG)
4385 r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®);
4387 r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®);
4390 #ifdef CONFIG_KVM_S390_UCONTROL
4391 case KVM_S390_UCAS_MAP: {
4392 struct kvm_s390_ucas_mapping ucasmap;
4394 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4399 if (!kvm_is_ucontrol(vcpu->kvm)) {
4404 r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
4405 ucasmap.vcpu_addr, ucasmap.length);
4408 case KVM_S390_UCAS_UNMAP: {
4409 struct kvm_s390_ucas_mapping ucasmap;
4411 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4416 if (!kvm_is_ucontrol(vcpu->kvm)) {
4421 r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
4426 case KVM_S390_VCPU_FAULT: {
4427 r = gmap_fault(vcpu->arch.gmap, arg, 0);
4430 case KVM_ENABLE_CAP:
4432 struct kvm_enable_cap cap;
4434 if (copy_from_user(&cap, argp, sizeof(cap)))
4436 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
4439 case KVM_S390_MEM_OP: {
4440 struct kvm_s390_mem_op mem_op;
4442 if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
4443 r = kvm_s390_guest_mem_op(vcpu, &mem_op);
4448 case KVM_S390_SET_IRQ_STATE: {
4449 struct kvm_s390_irq_state irq_state;
4452 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4454 if (irq_state.len > VCPU_IRQS_MAX_BUF ||
4455 irq_state.len == 0 ||
4456 irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
4460 /* do not use irq_state.flags, it will break old QEMUs */
4461 r = kvm_s390_set_irq_state(vcpu,
4462 (void __user *) irq_state.buf,
4466 case KVM_S390_GET_IRQ_STATE: {
4467 struct kvm_s390_irq_state irq_state;
4470 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4472 if (irq_state.len == 0) {
4476 /* do not use irq_state.flags, it will break old QEMUs */
4477 r = kvm_s390_get_irq_state(vcpu,
4478 (__u8 __user *) irq_state.buf,
4490 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
4492 #ifdef CONFIG_KVM_S390_UCONTROL
4493 if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
4494 && (kvm_is_ucontrol(vcpu->kvm))) {
4495 vmf->page = virt_to_page(vcpu->arch.sie_block);
4496 get_page(vmf->page);
4500 return VM_FAULT_SIGBUS;
4503 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
4504 unsigned long npages)
4509 /* Section: memory related */
4510 int kvm_arch_prepare_memory_region(struct kvm *kvm,
4511 struct kvm_memory_slot *memslot,
4512 const struct kvm_userspace_memory_region *mem,
4513 enum kvm_mr_change change)
4515 /* A few sanity checks. We can have memory slots which have to be
4516 located/ended at a segment boundary (1MB). The memory in userland is
4517 ok to be fragmented into various different vmas. It is okay to mmap()
4518 and munmap() stuff in this slot after doing this call at any time */
4520 if (mem->userspace_addr & 0xffffful)
4523 if (mem->memory_size & 0xffffful)
4526 if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
4529 if (!kvm->arch.migration_mode)
4533 * Turn off migration mode when:
4534 * - userspace creates a new memslot with dirty logging off,
4535 * - userspace modifies an existing memslot (MOVE or FLAGS_ONLY) and
4536 * dirty logging is turned off.
4537 * Migration mode expects dirty page logging being enabled to store
4540 if (change != KVM_MR_DELETE &&
4541 !(mem->flags & KVM_MEM_LOG_DIRTY_PAGES))
4542 WARN(kvm_s390_vm_stop_migration(kvm),
4543 "Failed to stop migration mode");
4548 void kvm_arch_commit_memory_region(struct kvm *kvm,
4549 const struct kvm_userspace_memory_region *mem,
4550 const struct kvm_memory_slot *old,
4551 const struct kvm_memory_slot *new,
4552 enum kvm_mr_change change)
4558 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4559 old->npages * PAGE_SIZE);
4562 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4563 old->npages * PAGE_SIZE);
4568 rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
4569 mem->guest_phys_addr, mem->memory_size);
4571 case KVM_MR_FLAGS_ONLY:
4574 WARN(1, "Unknown KVM MR CHANGE: %d\n", change);
4577 pr_warn("failed to commit memory region\n");
4581 static inline unsigned long nonhyp_mask(int i)
4583 unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
4585 return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
4588 void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
4590 vcpu->valid_wakeup = false;
4593 static int __init kvm_s390_init(void)
4597 if (!sclp.has_sief2) {
4598 pr_info("SIE is not available\n");
4602 if (nested && hpage) {
4603 pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n");
4607 for (i = 0; i < 16; i++)
4608 kvm_s390_fac_base[i] |=
4609 S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
4611 return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
4614 static void __exit kvm_s390_exit(void)
4619 module_init(kvm_s390_init);
4620 module_exit(kvm_s390_exit);
4623 * Enable autoloading of the kvm module.
4624 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
4625 * since x86 takes a different approach.
4627 #include <linux/miscdevice.h>
4628 MODULE_ALIAS_MISCDEV(KVM_MINOR);
4629 MODULE_ALIAS("devname:kvm");