1 // SPDX-License-Identifier: GPL-2.0
3 * hosting IBM Z kernel virtual machines (s390x)
5 * Copyright IBM Corp. 2008, 2018
7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 * Christian Borntraeger <borntraeger@de.ibm.com>
9 * Heiko Carstens <heiko.carstens@de.ibm.com>
10 * Christian Ehrhardt <ehrhardt@de.ibm.com>
11 * Jason J. Herne <jjherne@us.ibm.com>
14 #define KMSG_COMPONENT "kvm-s390"
15 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
17 #include <linux/compiler.h>
18 #include <linux/err.h>
20 #include <linux/hrtimer.h>
21 #include <linux/init.h>
22 #include <linux/kvm.h>
23 #include <linux/kvm_host.h>
24 #include <linux/mman.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/random.h>
28 #include <linux/slab.h>
29 #include <linux/timer.h>
30 #include <linux/vmalloc.h>
31 #include <linux/bitmap.h>
32 #include <linux/sched/signal.h>
33 #include <linux/string.h>
35 #include <asm/asm-offsets.h>
36 #include <asm/lowcore.h>
38 #include <asm/pgtable.h>
41 #include <asm/switch_to.h>
44 #include <asm/cpacf.h>
45 #include <asm/timex.h>
50 #define CREATE_TRACE_POINTS
52 #include "trace-s390.h"
54 #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */
56 #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
57 (KVM_MAX_VCPUS + LOCAL_IRQS))
59 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
60 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
62 struct kvm_stats_debugfs_item debugfs_entries[] = {
63 { "userspace_handled", VCPU_STAT(exit_userspace) },
64 { "exit_null", VCPU_STAT(exit_null) },
65 { "exit_validity", VCPU_STAT(exit_validity) },
66 { "exit_stop_request", VCPU_STAT(exit_stop_request) },
67 { "exit_external_request", VCPU_STAT(exit_external_request) },
68 { "exit_io_request", VCPU_STAT(exit_io_request) },
69 { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
70 { "exit_instruction", VCPU_STAT(exit_instruction) },
71 { "exit_pei", VCPU_STAT(exit_pei) },
72 { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
73 { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
74 { "exit_operation_exception", VCPU_STAT(exit_operation_exception) },
75 { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
76 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
77 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
78 { "halt_no_poll_steal", VCPU_STAT(halt_no_poll_steal) },
79 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
80 { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
81 { "instruction_lctl", VCPU_STAT(instruction_lctl) },
82 { "instruction_stctl", VCPU_STAT(instruction_stctl) },
83 { "instruction_stctg", VCPU_STAT(instruction_stctg) },
84 { "deliver_ckc", VCPU_STAT(deliver_ckc) },
85 { "deliver_cputm", VCPU_STAT(deliver_cputm) },
86 { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
87 { "deliver_external_call", VCPU_STAT(deliver_external_call) },
88 { "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
89 { "deliver_virtio", VCPU_STAT(deliver_virtio) },
90 { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
91 { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
92 { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
93 { "deliver_program", VCPU_STAT(deliver_program) },
94 { "deliver_io", VCPU_STAT(deliver_io) },
95 { "deliver_machine_check", VCPU_STAT(deliver_machine_check) },
96 { "exit_wait_state", VCPU_STAT(exit_wait_state) },
97 { "inject_ckc", VCPU_STAT(inject_ckc) },
98 { "inject_cputm", VCPU_STAT(inject_cputm) },
99 { "inject_external_call", VCPU_STAT(inject_external_call) },
100 { "inject_float_mchk", VM_STAT(inject_float_mchk) },
101 { "inject_emergency_signal", VCPU_STAT(inject_emergency_signal) },
102 { "inject_io", VM_STAT(inject_io) },
103 { "inject_mchk", VCPU_STAT(inject_mchk) },
104 { "inject_pfault_done", VM_STAT(inject_pfault_done) },
105 { "inject_program", VCPU_STAT(inject_program) },
106 { "inject_restart", VCPU_STAT(inject_restart) },
107 { "inject_service_signal", VM_STAT(inject_service_signal) },
108 { "inject_set_prefix", VCPU_STAT(inject_set_prefix) },
109 { "inject_stop_signal", VCPU_STAT(inject_stop_signal) },
110 { "inject_pfault_init", VCPU_STAT(inject_pfault_init) },
111 { "inject_virtio", VM_STAT(inject_virtio) },
112 { "instruction_epsw", VCPU_STAT(instruction_epsw) },
113 { "instruction_gs", VCPU_STAT(instruction_gs) },
114 { "instruction_io_other", VCPU_STAT(instruction_io_other) },
115 { "instruction_lpsw", VCPU_STAT(instruction_lpsw) },
116 { "instruction_lpswe", VCPU_STAT(instruction_lpswe) },
117 { "instruction_pfmf", VCPU_STAT(instruction_pfmf) },
118 { "instruction_ptff", VCPU_STAT(instruction_ptff) },
119 { "instruction_stidp", VCPU_STAT(instruction_stidp) },
120 { "instruction_sck", VCPU_STAT(instruction_sck) },
121 { "instruction_sckpf", VCPU_STAT(instruction_sckpf) },
122 { "instruction_spx", VCPU_STAT(instruction_spx) },
123 { "instruction_stpx", VCPU_STAT(instruction_stpx) },
124 { "instruction_stap", VCPU_STAT(instruction_stap) },
125 { "instruction_iske", VCPU_STAT(instruction_iske) },
126 { "instruction_ri", VCPU_STAT(instruction_ri) },
127 { "instruction_rrbe", VCPU_STAT(instruction_rrbe) },
128 { "instruction_sske", VCPU_STAT(instruction_sske) },
129 { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
130 { "instruction_essa", VCPU_STAT(instruction_essa) },
131 { "instruction_stsi", VCPU_STAT(instruction_stsi) },
132 { "instruction_stfl", VCPU_STAT(instruction_stfl) },
133 { "instruction_tb", VCPU_STAT(instruction_tb) },
134 { "instruction_tpi", VCPU_STAT(instruction_tpi) },
135 { "instruction_tprot", VCPU_STAT(instruction_tprot) },
136 { "instruction_tsch", VCPU_STAT(instruction_tsch) },
137 { "instruction_sthyi", VCPU_STAT(instruction_sthyi) },
138 { "instruction_sie", VCPU_STAT(instruction_sie) },
139 { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
140 { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) },
141 { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) },
142 { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
143 { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) },
144 { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) },
145 { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
146 { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) },
147 { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) },
148 { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) },
149 { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
150 { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
151 { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
152 { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) },
153 { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) },
154 { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) },
155 { "instruction_diag_10", VCPU_STAT(diagnose_10) },
156 { "instruction_diag_44", VCPU_STAT(diagnose_44) },
157 { "instruction_diag_9c", VCPU_STAT(diagnose_9c) },
158 { "instruction_diag_258", VCPU_STAT(diagnose_258) },
159 { "instruction_diag_308", VCPU_STAT(diagnose_308) },
160 { "instruction_diag_500", VCPU_STAT(diagnose_500) },
161 { "instruction_diag_other", VCPU_STAT(diagnose_other) },
165 struct kvm_s390_tod_clock_ext {
171 /* allow nested virtualization in KVM (if enabled by user space) */
173 module_param(nested, int, S_IRUGO);
174 MODULE_PARM_DESC(nested, "Nested virtualization support");
176 /* allow 1m huge page guest backing, if !nested */
178 module_param(hpage, int, 0444);
179 MODULE_PARM_DESC(hpage, "1m huge page backing support");
181 /* maximum percentage of steal time for polling. >100 is treated like 100 */
182 static u8 halt_poll_max_steal = 10;
183 module_param(halt_poll_max_steal, byte, 0644);
184 MODULE_PARM_DESC(halt_poll_max_steal, "Maximum percentage of steal time to allow polling");
187 * For now we handle at most 16 double words as this is what the s390 base
188 * kernel handles and stores in the prefix page. If we ever need to go beyond
189 * this, this requires changes to code, but the external uapi can stay.
191 #define SIZE_INTERNAL 16
194 * Base feature mask that defines default mask for facilities. Consists of the
195 * defines in FACILITIES_KVM and the non-hypervisor managed bits.
197 static unsigned long kvm_s390_fac_base[SIZE_INTERNAL] = { FACILITIES_KVM };
199 * Extended feature mask. Consists of the defines in FACILITIES_KVM_CPUMODEL
200 * and defines the facilities that can be enabled via a cpu model.
202 static unsigned long kvm_s390_fac_ext[SIZE_INTERNAL] = { FACILITIES_KVM_CPUMODEL };
204 static unsigned long kvm_s390_fac_size(void)
206 BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_MASK_SIZE_U64);
207 BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_LIST_SIZE_U64);
208 BUILD_BUG_ON(SIZE_INTERNAL * sizeof(unsigned long) >
209 sizeof(S390_lowcore.stfle_fac_list));
211 return SIZE_INTERNAL;
214 /* available cpu features supported by kvm */
215 static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
216 /* available subfunctions indicated via query / "test bit" */
217 static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;
219 static struct gmap_notifier gmap_notifier;
220 static struct gmap_notifier vsie_gmap_notifier;
221 debug_info_t *kvm_s390_dbf;
223 /* Section: not file related */
224 int kvm_arch_hardware_enable(void)
226 /* every s390 is virtualization enabled ;-) */
230 int kvm_arch_check_processor_compat(void)
235 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
238 static void kvm_clock_sync_scb(struct kvm_s390_sie_block *scb, u64 delta)
243 * The TOD jumps by delta, we have to compensate this by adding
244 * -delta to the epoch.
248 /* sign-extension - we're adding to signed values below */
253 if (scb->ecd & ECD_MEF) {
254 scb->epdx += delta_idx;
255 if (scb->epoch < delta)
261 * This callback is executed during stop_machine(). All CPUs are therefore
262 * temporarily stopped. In order not to change guest behavior, we have to
263 * disable preemption whenever we touch the epoch of kvm and the VCPUs,
264 * so a CPU won't be stopped while calculating with the epoch.
266 static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val,
270 struct kvm_vcpu *vcpu;
272 unsigned long long *delta = v;
274 list_for_each_entry(kvm, &vm_list, vm_list) {
275 kvm_for_each_vcpu(i, vcpu, kvm) {
276 kvm_clock_sync_scb(vcpu->arch.sie_block, *delta);
278 kvm->arch.epoch = vcpu->arch.sie_block->epoch;
279 kvm->arch.epdx = vcpu->arch.sie_block->epdx;
281 if (vcpu->arch.cputm_enabled)
282 vcpu->arch.cputm_start += *delta;
283 if (vcpu->arch.vsie_block)
284 kvm_clock_sync_scb(vcpu->arch.vsie_block,
291 static struct notifier_block kvm_clock_notifier = {
292 .notifier_call = kvm_clock_sync,
295 int kvm_arch_hardware_setup(void)
297 gmap_notifier.notifier_call = kvm_gmap_notifier;
298 gmap_register_pte_notifier(&gmap_notifier);
299 vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier;
300 gmap_register_pte_notifier(&vsie_gmap_notifier);
301 atomic_notifier_chain_register(&s390_epoch_delta_notifier,
302 &kvm_clock_notifier);
306 void kvm_arch_hardware_unsetup(void)
308 gmap_unregister_pte_notifier(&gmap_notifier);
309 gmap_unregister_pte_notifier(&vsie_gmap_notifier);
310 atomic_notifier_chain_unregister(&s390_epoch_delta_notifier,
311 &kvm_clock_notifier);
314 static void allow_cpu_feat(unsigned long nr)
316 set_bit_inv(nr, kvm_s390_available_cpu_feat);
319 static inline int plo_test_bit(unsigned char nr)
321 register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
325 /* Parameter registers are ignored for "test bit" */
335 static inline void __insn32_query(unsigned int opcode, u8 query[32])
337 register unsigned long r0 asm("0") = 0; /* query function */
338 register unsigned long r1 asm("1") = (unsigned long) query;
341 /* Parameter regs are ignored */
342 " .insn rrf,%[opc] << 16,2,4,6,0\n"
344 : "d" (r0), "a" (r1), [opc] "i" (opcode)
348 #define INSN_SORTL 0xb938
349 #define INSN_DFLTCC 0xb939
351 static void kvm_s390_cpu_feat_init(void)
355 for (i = 0; i < 256; ++i) {
357 kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7);
360 if (test_facility(28)) /* TOD-clock steering */
361 ptff(kvm_s390_available_subfunc.ptff,
362 sizeof(kvm_s390_available_subfunc.ptff),
365 if (test_facility(17)) { /* MSA */
366 __cpacf_query(CPACF_KMAC, (cpacf_mask_t *)
367 kvm_s390_available_subfunc.kmac);
368 __cpacf_query(CPACF_KMC, (cpacf_mask_t *)
369 kvm_s390_available_subfunc.kmc);
370 __cpacf_query(CPACF_KM, (cpacf_mask_t *)
371 kvm_s390_available_subfunc.km);
372 __cpacf_query(CPACF_KIMD, (cpacf_mask_t *)
373 kvm_s390_available_subfunc.kimd);
374 __cpacf_query(CPACF_KLMD, (cpacf_mask_t *)
375 kvm_s390_available_subfunc.klmd);
377 if (test_facility(76)) /* MSA3 */
378 __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *)
379 kvm_s390_available_subfunc.pckmo);
380 if (test_facility(77)) { /* MSA4 */
381 __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *)
382 kvm_s390_available_subfunc.kmctr);
383 __cpacf_query(CPACF_KMF, (cpacf_mask_t *)
384 kvm_s390_available_subfunc.kmf);
385 __cpacf_query(CPACF_KMO, (cpacf_mask_t *)
386 kvm_s390_available_subfunc.kmo);
387 __cpacf_query(CPACF_PCC, (cpacf_mask_t *)
388 kvm_s390_available_subfunc.pcc);
390 if (test_facility(57)) /* MSA5 */
391 __cpacf_query(CPACF_PRNO, (cpacf_mask_t *)
392 kvm_s390_available_subfunc.ppno);
394 if (test_facility(146)) /* MSA8 */
395 __cpacf_query(CPACF_KMA, (cpacf_mask_t *)
396 kvm_s390_available_subfunc.kma);
398 if (test_facility(155)) /* MSA9 */
399 __cpacf_query(CPACF_KDSA, (cpacf_mask_t *)
400 kvm_s390_available_subfunc.kdsa);
402 if (test_facility(150)) /* SORTL */
403 __insn32_query(INSN_SORTL, kvm_s390_available_subfunc.sortl);
405 if (test_facility(151)) /* DFLTCC */
406 __insn32_query(INSN_DFLTCC, kvm_s390_available_subfunc.dfltcc);
408 if (MACHINE_HAS_ESOP)
409 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
411 * We need SIE support, ESOP (PROT_READ protection for gmap_shadow),
412 * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing).
414 if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao ||
415 !test_facility(3) || !nested)
417 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2);
418 if (sclp.has_64bscao)
419 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO);
421 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF);
423 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE);
425 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
427 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
429 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
431 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
433 allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS);
435 * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make
436 * all skey handling functions read/set the skey from the PGSTE
437 * instead of the real storage key.
439 * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make
440 * pages being detected as preserved although they are resident.
442 * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will
443 * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY.
445 * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and
446 * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be
447 * correctly shadowed. We can do that for the PGSTE but not for PTE.I.
449 * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We
450 * cannot easily shadow the SCA because of the ipte lock.
454 int kvm_arch_init(void *opaque)
458 kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
462 if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
464 goto out_debug_unreg;
467 kvm_s390_cpu_feat_init();
469 /* Register floating interrupt controller interface. */
470 rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
472 pr_err("A FLIC registration call failed with rc=%d\n", rc);
473 goto out_debug_unreg;
476 rc = kvm_s390_gib_init(GAL_ISC);
478 goto out_gib_destroy;
483 kvm_s390_gib_destroy();
485 debug_unregister(kvm_s390_dbf);
489 void kvm_arch_exit(void)
491 kvm_s390_gib_destroy();
492 debug_unregister(kvm_s390_dbf);
495 /* Section: device related */
496 long kvm_arch_dev_ioctl(struct file *filp,
497 unsigned int ioctl, unsigned long arg)
499 if (ioctl == KVM_S390_ENABLE_SIE)
500 return s390_enable_sie();
504 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
509 case KVM_CAP_S390_PSW:
510 case KVM_CAP_S390_GMAP:
511 case KVM_CAP_SYNC_MMU:
512 #ifdef CONFIG_KVM_S390_UCONTROL
513 case KVM_CAP_S390_UCONTROL:
515 case KVM_CAP_ASYNC_PF:
516 case KVM_CAP_SYNC_REGS:
517 case KVM_CAP_ONE_REG:
518 case KVM_CAP_ENABLE_CAP:
519 case KVM_CAP_S390_CSS_SUPPORT:
520 case KVM_CAP_IOEVENTFD:
521 case KVM_CAP_DEVICE_CTRL:
522 case KVM_CAP_S390_IRQCHIP:
523 case KVM_CAP_VM_ATTRIBUTES:
524 case KVM_CAP_MP_STATE:
525 case KVM_CAP_IMMEDIATE_EXIT:
526 case KVM_CAP_S390_INJECT_IRQ:
527 case KVM_CAP_S390_USER_SIGP:
528 case KVM_CAP_S390_USER_STSI:
529 case KVM_CAP_S390_SKEYS:
530 case KVM_CAP_S390_IRQ_STATE:
531 case KVM_CAP_S390_USER_INSTR0:
532 case KVM_CAP_S390_CMMA_MIGRATION:
533 case KVM_CAP_S390_AIS:
534 case KVM_CAP_S390_AIS_MIGRATION:
537 case KVM_CAP_S390_HPAGE_1M:
539 if (hpage && !kvm_is_ucontrol(kvm))
542 case KVM_CAP_S390_MEM_OP:
545 case KVM_CAP_NR_VCPUS:
546 case KVM_CAP_MAX_VCPUS:
547 case KVM_CAP_MAX_VCPU_ID:
548 r = KVM_S390_BSCA_CPU_SLOTS;
549 if (!kvm_s390_use_sca_entries())
551 else if (sclp.has_esca && sclp.has_64bscao)
552 r = KVM_S390_ESCA_CPU_SLOTS;
554 case KVM_CAP_S390_COW:
555 r = MACHINE_HAS_ESOP;
557 case KVM_CAP_S390_VECTOR_REGISTERS:
560 case KVM_CAP_S390_RI:
561 r = test_facility(64);
563 case KVM_CAP_S390_GS:
564 r = test_facility(133);
566 case KVM_CAP_S390_BPB:
567 r = test_facility(82);
575 static void kvm_s390_sync_dirty_log(struct kvm *kvm,
576 struct kvm_memory_slot *memslot)
579 gfn_t cur_gfn, last_gfn;
580 unsigned long gaddr, vmaddr;
581 struct gmap *gmap = kvm->arch.gmap;
582 DECLARE_BITMAP(bitmap, _PAGE_ENTRIES);
584 /* Loop over all guest segments */
585 cur_gfn = memslot->base_gfn;
586 last_gfn = memslot->base_gfn + memslot->npages;
587 for (; cur_gfn <= last_gfn; cur_gfn += _PAGE_ENTRIES) {
588 gaddr = gfn_to_gpa(cur_gfn);
589 vmaddr = gfn_to_hva_memslot(memslot, cur_gfn);
590 if (kvm_is_error_hva(vmaddr))
593 bitmap_zero(bitmap, _PAGE_ENTRIES);
594 gmap_sync_dirty_log_pmd(gmap, bitmap, gaddr, vmaddr);
595 for (i = 0; i < _PAGE_ENTRIES; i++) {
596 if (test_bit(i, bitmap))
597 mark_page_dirty(kvm, cur_gfn + i);
600 if (fatal_signal_pending(current))
606 /* Section: vm related */
607 static void sca_del_vcpu(struct kvm_vcpu *vcpu);
610 * Get (and clear) the dirty memory log for a memory slot.
612 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
613 struct kvm_dirty_log *log)
617 struct kvm_memslots *slots;
618 struct kvm_memory_slot *memslot;
621 if (kvm_is_ucontrol(kvm))
624 mutex_lock(&kvm->slots_lock);
627 if (log->slot >= KVM_USER_MEM_SLOTS)
630 slots = kvm_memslots(kvm);
631 memslot = id_to_memslot(slots, log->slot);
633 if (!memslot->dirty_bitmap)
636 kvm_s390_sync_dirty_log(kvm, memslot);
637 r = kvm_get_dirty_log(kvm, log, &is_dirty);
641 /* Clear the dirty log */
643 n = kvm_dirty_bitmap_bytes(memslot);
644 memset(memslot->dirty_bitmap, 0, n);
648 mutex_unlock(&kvm->slots_lock);
652 static void icpt_operexc_on_all_vcpus(struct kvm *kvm)
655 struct kvm_vcpu *vcpu;
657 kvm_for_each_vcpu(i, vcpu, kvm) {
658 kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu);
662 int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
670 case KVM_CAP_S390_IRQCHIP:
671 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP");
672 kvm->arch.use_irqchip = 1;
675 case KVM_CAP_S390_USER_SIGP:
676 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP");
677 kvm->arch.user_sigp = 1;
680 case KVM_CAP_S390_VECTOR_REGISTERS:
681 mutex_lock(&kvm->lock);
682 if (kvm->created_vcpus) {
684 } else if (MACHINE_HAS_VX) {
685 set_kvm_facility(kvm->arch.model.fac_mask, 129);
686 set_kvm_facility(kvm->arch.model.fac_list, 129);
687 if (test_facility(134)) {
688 set_kvm_facility(kvm->arch.model.fac_mask, 134);
689 set_kvm_facility(kvm->arch.model.fac_list, 134);
691 if (test_facility(135)) {
692 set_kvm_facility(kvm->arch.model.fac_mask, 135);
693 set_kvm_facility(kvm->arch.model.fac_list, 135);
695 if (test_facility(148)) {
696 set_kvm_facility(kvm->arch.model.fac_mask, 148);
697 set_kvm_facility(kvm->arch.model.fac_list, 148);
699 if (test_facility(152)) {
700 set_kvm_facility(kvm->arch.model.fac_mask, 152);
701 set_kvm_facility(kvm->arch.model.fac_list, 152);
706 mutex_unlock(&kvm->lock);
707 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s",
708 r ? "(not available)" : "(success)");
710 case KVM_CAP_S390_RI:
712 mutex_lock(&kvm->lock);
713 if (kvm->created_vcpus) {
715 } else if (test_facility(64)) {
716 set_kvm_facility(kvm->arch.model.fac_mask, 64);
717 set_kvm_facility(kvm->arch.model.fac_list, 64);
720 mutex_unlock(&kvm->lock);
721 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
722 r ? "(not available)" : "(success)");
724 case KVM_CAP_S390_AIS:
725 mutex_lock(&kvm->lock);
726 if (kvm->created_vcpus) {
729 set_kvm_facility(kvm->arch.model.fac_mask, 72);
730 set_kvm_facility(kvm->arch.model.fac_list, 72);
733 mutex_unlock(&kvm->lock);
734 VM_EVENT(kvm, 3, "ENABLE: AIS %s",
735 r ? "(not available)" : "(success)");
737 case KVM_CAP_S390_GS:
739 mutex_lock(&kvm->lock);
740 if (kvm->created_vcpus) {
742 } else if (test_facility(133)) {
743 set_kvm_facility(kvm->arch.model.fac_mask, 133);
744 set_kvm_facility(kvm->arch.model.fac_list, 133);
747 mutex_unlock(&kvm->lock);
748 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s",
749 r ? "(not available)" : "(success)");
751 case KVM_CAP_S390_HPAGE_1M:
752 mutex_lock(&kvm->lock);
753 if (kvm->created_vcpus)
755 else if (!hpage || kvm->arch.use_cmma || kvm_is_ucontrol(kvm))
759 down_write(&kvm->mm->mmap_sem);
760 kvm->mm->context.allow_gmap_hpage_1m = 1;
761 up_write(&kvm->mm->mmap_sem);
763 * We might have to create fake 4k page
764 * tables. To avoid that the hardware works on
765 * stale PGSTEs, we emulate these instructions.
767 kvm->arch.use_skf = 0;
768 kvm->arch.use_pfmfi = 0;
770 mutex_unlock(&kvm->lock);
771 VM_EVENT(kvm, 3, "ENABLE: CAP_S390_HPAGE %s",
772 r ? "(not available)" : "(success)");
774 case KVM_CAP_S390_USER_STSI:
775 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
776 kvm->arch.user_stsi = 1;
779 case KVM_CAP_S390_USER_INSTR0:
780 VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0");
781 kvm->arch.user_instr0 = 1;
782 icpt_operexc_on_all_vcpus(kvm);
792 static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
796 switch (attr->attr) {
797 case KVM_S390_VM_MEM_LIMIT_SIZE:
799 VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes",
800 kvm->arch.mem_limit);
801 if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr))
811 static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
815 switch (attr->attr) {
816 case KVM_S390_VM_MEM_ENABLE_CMMA:
821 VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
822 mutex_lock(&kvm->lock);
823 if (kvm->created_vcpus)
825 else if (kvm->mm->context.allow_gmap_hpage_1m)
828 kvm->arch.use_cmma = 1;
829 /* Not compatible with cmma. */
830 kvm->arch.use_pfmfi = 0;
833 mutex_unlock(&kvm->lock);
835 case KVM_S390_VM_MEM_CLR_CMMA:
840 if (!kvm->arch.use_cmma)
843 VM_EVENT(kvm, 3, "%s", "RESET: CMMA states");
844 mutex_lock(&kvm->lock);
845 idx = srcu_read_lock(&kvm->srcu);
846 s390_reset_cmma(kvm->arch.gmap->mm);
847 srcu_read_unlock(&kvm->srcu, idx);
848 mutex_unlock(&kvm->lock);
851 case KVM_S390_VM_MEM_LIMIT_SIZE: {
852 unsigned long new_limit;
854 if (kvm_is_ucontrol(kvm))
857 if (get_user(new_limit, (u64 __user *)attr->addr))
860 if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT &&
861 new_limit > kvm->arch.mem_limit)
867 /* gmap_create takes last usable address */
868 if (new_limit != KVM_S390_NO_MEM_LIMIT)
872 mutex_lock(&kvm->lock);
873 if (!kvm->created_vcpus) {
874 /* gmap_create will round the limit up */
875 struct gmap *new = gmap_create(current->mm, new_limit);
880 gmap_remove(kvm->arch.gmap);
882 kvm->arch.gmap = new;
886 mutex_unlock(&kvm->lock);
887 VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit);
888 VM_EVENT(kvm, 3, "New guest asce: 0x%pK",
889 (void *) kvm->arch.gmap->asce);
899 static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu);
901 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm)
903 struct kvm_vcpu *vcpu;
906 kvm_s390_vcpu_block_all(kvm);
908 kvm_for_each_vcpu(i, vcpu, kvm) {
909 kvm_s390_vcpu_crypto_setup(vcpu);
910 /* recreate the shadow crycb by leaving the VSIE handler */
911 kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu);
914 kvm_s390_vcpu_unblock_all(kvm);
917 static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
919 mutex_lock(&kvm->lock);
920 switch (attr->attr) {
921 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
922 if (!test_kvm_facility(kvm, 76)) {
923 mutex_unlock(&kvm->lock);
927 kvm->arch.crypto.crycb->aes_wrapping_key_mask,
928 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
929 kvm->arch.crypto.aes_kw = 1;
930 VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support");
932 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
933 if (!test_kvm_facility(kvm, 76)) {
934 mutex_unlock(&kvm->lock);
938 kvm->arch.crypto.crycb->dea_wrapping_key_mask,
939 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
940 kvm->arch.crypto.dea_kw = 1;
941 VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support");
943 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
944 if (!test_kvm_facility(kvm, 76)) {
945 mutex_unlock(&kvm->lock);
948 kvm->arch.crypto.aes_kw = 0;
949 memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0,
950 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
951 VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support");
953 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
954 if (!test_kvm_facility(kvm, 76)) {
955 mutex_unlock(&kvm->lock);
958 kvm->arch.crypto.dea_kw = 0;
959 memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0,
960 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
961 VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support");
963 case KVM_S390_VM_CRYPTO_ENABLE_APIE:
964 if (!ap_instructions_available()) {
965 mutex_unlock(&kvm->lock);
968 kvm->arch.crypto.apie = 1;
970 case KVM_S390_VM_CRYPTO_DISABLE_APIE:
971 if (!ap_instructions_available()) {
972 mutex_unlock(&kvm->lock);
975 kvm->arch.crypto.apie = 0;
978 mutex_unlock(&kvm->lock);
982 kvm_s390_vcpu_crypto_reset_all(kvm);
983 mutex_unlock(&kvm->lock);
987 static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req)
990 struct kvm_vcpu *vcpu;
992 kvm_for_each_vcpu(cx, vcpu, kvm)
993 kvm_s390_sync_request(req, vcpu);
997 * Must be called with kvm->srcu held to avoid races on memslots, and with
998 * kvm->slots_lock to avoid races with ourselves and kvm_s390_vm_stop_migration.
1000 static int kvm_s390_vm_start_migration(struct kvm *kvm)
1002 struct kvm_memory_slot *ms;
1003 struct kvm_memslots *slots;
1004 unsigned long ram_pages = 0;
1007 /* migration mode already enabled */
1008 if (kvm->arch.migration_mode)
1010 slots = kvm_memslots(kvm);
1011 if (!slots || !slots->used_slots)
1014 if (!kvm->arch.use_cmma) {
1015 kvm->arch.migration_mode = 1;
1018 /* mark all the pages in active slots as dirty */
1019 for (slotnr = 0; slotnr < slots->used_slots; slotnr++) {
1020 ms = slots->memslots + slotnr;
1022 * The second half of the bitmap is only used on x86,
1023 * and would be wasted otherwise, so we put it to good
1024 * use here to keep track of the state of the storage
1027 memset(kvm_second_dirty_bitmap(ms), 0xff, kvm_dirty_bitmap_bytes(ms));
1028 ram_pages += ms->npages;
1030 atomic64_set(&kvm->arch.cmma_dirty_pages, ram_pages);
1031 kvm->arch.migration_mode = 1;
1032 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_START_MIGRATION);
1037 * Must be called with kvm->slots_lock to avoid races with ourselves and
1038 * kvm_s390_vm_start_migration.
1040 static int kvm_s390_vm_stop_migration(struct kvm *kvm)
1042 /* migration mode already disabled */
1043 if (!kvm->arch.migration_mode)
1045 kvm->arch.migration_mode = 0;
1046 if (kvm->arch.use_cmma)
1047 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION);
1051 static int kvm_s390_vm_set_migration(struct kvm *kvm,
1052 struct kvm_device_attr *attr)
1056 mutex_lock(&kvm->slots_lock);
1057 switch (attr->attr) {
1058 case KVM_S390_VM_MIGRATION_START:
1059 res = kvm_s390_vm_start_migration(kvm);
1061 case KVM_S390_VM_MIGRATION_STOP:
1062 res = kvm_s390_vm_stop_migration(kvm);
1067 mutex_unlock(&kvm->slots_lock);
1072 static int kvm_s390_vm_get_migration(struct kvm *kvm,
1073 struct kvm_device_attr *attr)
1075 u64 mig = kvm->arch.migration_mode;
1077 if (attr->attr != KVM_S390_VM_MIGRATION_STATUS)
1080 if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig)))
1085 static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
1087 struct kvm_s390_vm_tod_clock gtod;
1089 if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod)))
1092 if (!test_kvm_facility(kvm, 139) && gtod.epoch_idx)
1094 kvm_s390_set_tod_clock(kvm, >od);
1096 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx",
1097 gtod.epoch_idx, gtod.tod);
1102 static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
1106 if (copy_from_user(>od_high, (void __user *)attr->addr,
1112 VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
1117 static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
1119 struct kvm_s390_vm_tod_clock gtod = { 0 };
1121 if (copy_from_user(>od.tod, (void __user *)attr->addr,
1125 kvm_s390_set_tod_clock(kvm, >od);
1126 VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod.tod);
1130 static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
1137 switch (attr->attr) {
1138 case KVM_S390_VM_TOD_EXT:
1139 ret = kvm_s390_set_tod_ext(kvm, attr);
1141 case KVM_S390_VM_TOD_HIGH:
1142 ret = kvm_s390_set_tod_high(kvm, attr);
1144 case KVM_S390_VM_TOD_LOW:
1145 ret = kvm_s390_set_tod_low(kvm, attr);
1154 static void kvm_s390_get_tod_clock(struct kvm *kvm,
1155 struct kvm_s390_vm_tod_clock *gtod)
1157 struct kvm_s390_tod_clock_ext htod;
1161 get_tod_clock_ext((char *)&htod);
1163 gtod->tod = htod.tod + kvm->arch.epoch;
1164 gtod->epoch_idx = 0;
1165 if (test_kvm_facility(kvm, 139)) {
1166 gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;
1167 if (gtod->tod < htod.tod)
1168 gtod->epoch_idx += 1;
1174 static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
1176 struct kvm_s390_vm_tod_clock gtod;
1178 memset(>od, 0, sizeof(gtod));
1179 kvm_s390_get_tod_clock(kvm, >od);
1180 if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
1183 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x, TOD base: 0x%llx",
1184 gtod.epoch_idx, gtod.tod);
1188 static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr)
1192 if (copy_to_user((void __user *)attr->addr, >od_high,
1195 VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
1200 static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
1204 gtod = kvm_s390_get_tod_clock_fast(kvm);
1205 if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
1207 VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
1212 static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr)
1219 switch (attr->attr) {
1220 case KVM_S390_VM_TOD_EXT:
1221 ret = kvm_s390_get_tod_ext(kvm, attr);
1223 case KVM_S390_VM_TOD_HIGH:
1224 ret = kvm_s390_get_tod_high(kvm, attr);
1226 case KVM_S390_VM_TOD_LOW:
1227 ret = kvm_s390_get_tod_low(kvm, attr);
1236 static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr)
1238 struct kvm_s390_vm_cpu_processor *proc;
1239 u16 lowest_ibc, unblocked_ibc;
1242 mutex_lock(&kvm->lock);
1243 if (kvm->created_vcpus) {
1247 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
1252 if (!copy_from_user(proc, (void __user *)attr->addr,
1254 kvm->arch.model.cpuid = proc->cpuid;
1255 lowest_ibc = sclp.ibc >> 16 & 0xfff;
1256 unblocked_ibc = sclp.ibc & 0xfff;
1257 if (lowest_ibc && proc->ibc) {
1258 if (proc->ibc > unblocked_ibc)
1259 kvm->arch.model.ibc = unblocked_ibc;
1260 else if (proc->ibc < lowest_ibc)
1261 kvm->arch.model.ibc = lowest_ibc;
1263 kvm->arch.model.ibc = proc->ibc;
1265 memcpy(kvm->arch.model.fac_list, proc->fac_list,
1266 S390_ARCH_FAC_LIST_SIZE_BYTE);
1267 VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
1268 kvm->arch.model.ibc,
1269 kvm->arch.model.cpuid);
1270 VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1271 kvm->arch.model.fac_list[0],
1272 kvm->arch.model.fac_list[1],
1273 kvm->arch.model.fac_list[2]);
1278 mutex_unlock(&kvm->lock);
1282 static int kvm_s390_set_processor_feat(struct kvm *kvm,
1283 struct kvm_device_attr *attr)
1285 struct kvm_s390_vm_cpu_feat data;
1287 if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
1289 if (!bitmap_subset((unsigned long *) data.feat,
1290 kvm_s390_available_cpu_feat,
1291 KVM_S390_VM_CPU_FEAT_NR_BITS))
1294 mutex_lock(&kvm->lock);
1295 if (kvm->created_vcpus) {
1296 mutex_unlock(&kvm->lock);
1299 bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
1300 KVM_S390_VM_CPU_FEAT_NR_BITS);
1301 mutex_unlock(&kvm->lock);
1302 VM_EVENT(kvm, 3, "SET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1309 static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
1310 struct kvm_device_attr *attr)
1312 mutex_lock(&kvm->lock);
1313 if (kvm->created_vcpus) {
1314 mutex_unlock(&kvm->lock);
1318 if (copy_from_user(&kvm->arch.model.subfuncs, (void __user *)attr->addr,
1319 sizeof(struct kvm_s390_vm_cpu_subfunc))) {
1320 mutex_unlock(&kvm->lock);
1323 mutex_unlock(&kvm->lock);
1325 VM_EVENT(kvm, 3, "SET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1326 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
1327 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
1328 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
1329 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
1330 VM_EVENT(kvm, 3, "SET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
1331 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
1332 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
1333 VM_EVENT(kvm, 3, "SET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
1334 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
1335 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
1336 VM_EVENT(kvm, 3, "SET: guest KMC subfunc 0x%16.16lx.%16.16lx",
1337 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
1338 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
1339 VM_EVENT(kvm, 3, "SET: guest KM subfunc 0x%16.16lx.%16.16lx",
1340 ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
1341 ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
1342 VM_EVENT(kvm, 3, "SET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
1343 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
1344 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
1345 VM_EVENT(kvm, 3, "SET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
1346 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
1347 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
1348 VM_EVENT(kvm, 3, "SET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
1349 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
1350 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
1351 VM_EVENT(kvm, 3, "SET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
1352 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
1353 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
1354 VM_EVENT(kvm, 3, "SET: guest KMF subfunc 0x%16.16lx.%16.16lx",
1355 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
1356 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
1357 VM_EVENT(kvm, 3, "SET: guest KMO subfunc 0x%16.16lx.%16.16lx",
1358 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
1359 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
1360 VM_EVENT(kvm, 3, "SET: guest PCC subfunc 0x%16.16lx.%16.16lx",
1361 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
1362 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
1363 VM_EVENT(kvm, 3, "SET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
1364 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
1365 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
1366 VM_EVENT(kvm, 3, "SET: guest KMA subfunc 0x%16.16lx.%16.16lx",
1367 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
1368 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
1369 VM_EVENT(kvm, 3, "SET: guest KDSA subfunc 0x%16.16lx.%16.16lx",
1370 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0],
1371 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]);
1372 VM_EVENT(kvm, 3, "SET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1373 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0],
1374 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1],
1375 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2],
1376 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]);
1377 VM_EVENT(kvm, 3, "SET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1378 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0],
1379 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1],
1380 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2],
1381 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]);
1386 static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1390 switch (attr->attr) {
1391 case KVM_S390_VM_CPU_PROCESSOR:
1392 ret = kvm_s390_set_processor(kvm, attr);
1394 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1395 ret = kvm_s390_set_processor_feat(kvm, attr);
1397 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1398 ret = kvm_s390_set_processor_subfunc(kvm, attr);
1404 static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr)
1406 struct kvm_s390_vm_cpu_processor *proc;
1409 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
1414 proc->cpuid = kvm->arch.model.cpuid;
1415 proc->ibc = kvm->arch.model.ibc;
1416 memcpy(&proc->fac_list, kvm->arch.model.fac_list,
1417 S390_ARCH_FAC_LIST_SIZE_BYTE);
1418 VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx",
1419 kvm->arch.model.ibc,
1420 kvm->arch.model.cpuid);
1421 VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1422 kvm->arch.model.fac_list[0],
1423 kvm->arch.model.fac_list[1],
1424 kvm->arch.model.fac_list[2]);
1425 if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc)))
1432 static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
1434 struct kvm_s390_vm_cpu_machine *mach;
1437 mach = kzalloc(sizeof(*mach), GFP_KERNEL);
1442 get_cpu_id((struct cpuid *) &mach->cpuid);
1443 mach->ibc = sclp.ibc;
1444 memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
1445 S390_ARCH_FAC_LIST_SIZE_BYTE);
1446 memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
1447 sizeof(S390_lowcore.stfle_fac_list));
1448 VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx",
1449 kvm->arch.model.ibc,
1450 kvm->arch.model.cpuid);
1451 VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx",
1455 VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx",
1459 if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
1466 static int kvm_s390_get_processor_feat(struct kvm *kvm,
1467 struct kvm_device_attr *attr)
1469 struct kvm_s390_vm_cpu_feat data;
1471 bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat,
1472 KVM_S390_VM_CPU_FEAT_NR_BITS);
1473 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
1475 VM_EVENT(kvm, 3, "GET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1482 static int kvm_s390_get_machine_feat(struct kvm *kvm,
1483 struct kvm_device_attr *attr)
1485 struct kvm_s390_vm_cpu_feat data;
1487 bitmap_copy((unsigned long *) data.feat,
1488 kvm_s390_available_cpu_feat,
1489 KVM_S390_VM_CPU_FEAT_NR_BITS);
1490 if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
1492 VM_EVENT(kvm, 3, "GET: host feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
1499 static int kvm_s390_get_processor_subfunc(struct kvm *kvm,
1500 struct kvm_device_attr *attr)
1502 if (copy_to_user((void __user *)attr->addr, &kvm->arch.model.subfuncs,
1503 sizeof(struct kvm_s390_vm_cpu_subfunc)))
1506 VM_EVENT(kvm, 3, "GET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1507 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0],
1508 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1],
1509 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2],
1510 ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]);
1511 VM_EVENT(kvm, 3, "GET: guest PTFF subfunc 0x%16.16lx.%16.16lx",
1512 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0],
1513 ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]);
1514 VM_EVENT(kvm, 3, "GET: guest KMAC subfunc 0x%16.16lx.%16.16lx",
1515 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0],
1516 ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]);
1517 VM_EVENT(kvm, 3, "GET: guest KMC subfunc 0x%16.16lx.%16.16lx",
1518 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0],
1519 ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]);
1520 VM_EVENT(kvm, 3, "GET: guest KM subfunc 0x%16.16lx.%16.16lx",
1521 ((unsigned long *) &kvm->arch.model.subfuncs.km)[0],
1522 ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]);
1523 VM_EVENT(kvm, 3, "GET: guest KIMD subfunc 0x%16.16lx.%16.16lx",
1524 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0],
1525 ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]);
1526 VM_EVENT(kvm, 3, "GET: guest KLMD subfunc 0x%16.16lx.%16.16lx",
1527 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0],
1528 ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]);
1529 VM_EVENT(kvm, 3, "GET: guest PCKMO subfunc 0x%16.16lx.%16.16lx",
1530 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0],
1531 ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]);
1532 VM_EVENT(kvm, 3, "GET: guest KMCTR subfunc 0x%16.16lx.%16.16lx",
1533 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0],
1534 ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]);
1535 VM_EVENT(kvm, 3, "GET: guest KMF subfunc 0x%16.16lx.%16.16lx",
1536 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0],
1537 ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]);
1538 VM_EVENT(kvm, 3, "GET: guest KMO subfunc 0x%16.16lx.%16.16lx",
1539 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0],
1540 ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]);
1541 VM_EVENT(kvm, 3, "GET: guest PCC subfunc 0x%16.16lx.%16.16lx",
1542 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0],
1543 ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]);
1544 VM_EVENT(kvm, 3, "GET: guest PPNO subfunc 0x%16.16lx.%16.16lx",
1545 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0],
1546 ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]);
1547 VM_EVENT(kvm, 3, "GET: guest KMA subfunc 0x%16.16lx.%16.16lx",
1548 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0],
1549 ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]);
1550 VM_EVENT(kvm, 3, "GET: guest KDSA subfunc 0x%16.16lx.%16.16lx",
1551 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0],
1552 ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]);
1553 VM_EVENT(kvm, 3, "GET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1554 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0],
1555 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1],
1556 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2],
1557 ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]);
1558 VM_EVENT(kvm, 3, "GET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1559 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0],
1560 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1],
1561 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2],
1562 ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]);
1567 static int kvm_s390_get_machine_subfunc(struct kvm *kvm,
1568 struct kvm_device_attr *attr)
1570 if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc,
1571 sizeof(struct kvm_s390_vm_cpu_subfunc)))
1574 VM_EVENT(kvm, 3, "GET: host PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1575 ((unsigned long *) &kvm_s390_available_subfunc.plo)[0],
1576 ((unsigned long *) &kvm_s390_available_subfunc.plo)[1],
1577 ((unsigned long *) &kvm_s390_available_subfunc.plo)[2],
1578 ((unsigned long *) &kvm_s390_available_subfunc.plo)[3]);
1579 VM_EVENT(kvm, 3, "GET: host PTFF subfunc 0x%16.16lx.%16.16lx",
1580 ((unsigned long *) &kvm_s390_available_subfunc.ptff)[0],
1581 ((unsigned long *) &kvm_s390_available_subfunc.ptff)[1]);
1582 VM_EVENT(kvm, 3, "GET: host KMAC subfunc 0x%16.16lx.%16.16lx",
1583 ((unsigned long *) &kvm_s390_available_subfunc.kmac)[0],
1584 ((unsigned long *) &kvm_s390_available_subfunc.kmac)[1]);
1585 VM_EVENT(kvm, 3, "GET: host KMC subfunc 0x%16.16lx.%16.16lx",
1586 ((unsigned long *) &kvm_s390_available_subfunc.kmc)[0],
1587 ((unsigned long *) &kvm_s390_available_subfunc.kmc)[1]);
1588 VM_EVENT(kvm, 3, "GET: host KM subfunc 0x%16.16lx.%16.16lx",
1589 ((unsigned long *) &kvm_s390_available_subfunc.km)[0],
1590 ((unsigned long *) &kvm_s390_available_subfunc.km)[1]);
1591 VM_EVENT(kvm, 3, "GET: host KIMD subfunc 0x%16.16lx.%16.16lx",
1592 ((unsigned long *) &kvm_s390_available_subfunc.kimd)[0],
1593 ((unsigned long *) &kvm_s390_available_subfunc.kimd)[1]);
1594 VM_EVENT(kvm, 3, "GET: host KLMD subfunc 0x%16.16lx.%16.16lx",
1595 ((unsigned long *) &kvm_s390_available_subfunc.klmd)[0],
1596 ((unsigned long *) &kvm_s390_available_subfunc.klmd)[1]);
1597 VM_EVENT(kvm, 3, "GET: host PCKMO subfunc 0x%16.16lx.%16.16lx",
1598 ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[0],
1599 ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[1]);
1600 VM_EVENT(kvm, 3, "GET: host KMCTR subfunc 0x%16.16lx.%16.16lx",
1601 ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[0],
1602 ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[1]);
1603 VM_EVENT(kvm, 3, "GET: host KMF subfunc 0x%16.16lx.%16.16lx",
1604 ((unsigned long *) &kvm_s390_available_subfunc.kmf)[0],
1605 ((unsigned long *) &kvm_s390_available_subfunc.kmf)[1]);
1606 VM_EVENT(kvm, 3, "GET: host KMO subfunc 0x%16.16lx.%16.16lx",
1607 ((unsigned long *) &kvm_s390_available_subfunc.kmo)[0],
1608 ((unsigned long *) &kvm_s390_available_subfunc.kmo)[1]);
1609 VM_EVENT(kvm, 3, "GET: host PCC subfunc 0x%16.16lx.%16.16lx",
1610 ((unsigned long *) &kvm_s390_available_subfunc.pcc)[0],
1611 ((unsigned long *) &kvm_s390_available_subfunc.pcc)[1]);
1612 VM_EVENT(kvm, 3, "GET: host PPNO subfunc 0x%16.16lx.%16.16lx",
1613 ((unsigned long *) &kvm_s390_available_subfunc.ppno)[0],
1614 ((unsigned long *) &kvm_s390_available_subfunc.ppno)[1]);
1615 VM_EVENT(kvm, 3, "GET: host KMA subfunc 0x%16.16lx.%16.16lx",
1616 ((unsigned long *) &kvm_s390_available_subfunc.kma)[0],
1617 ((unsigned long *) &kvm_s390_available_subfunc.kma)[1]);
1618 VM_EVENT(kvm, 3, "GET: host KDSA subfunc 0x%16.16lx.%16.16lx",
1619 ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[0],
1620 ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[1]);
1621 VM_EVENT(kvm, 3, "GET: host SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1622 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[0],
1623 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[1],
1624 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[2],
1625 ((unsigned long *) &kvm_s390_available_subfunc.sortl)[3]);
1626 VM_EVENT(kvm, 3, "GET: host DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx",
1627 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[0],
1628 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[1],
1629 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[2],
1630 ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[3]);
1635 static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr)
1639 switch (attr->attr) {
1640 case KVM_S390_VM_CPU_PROCESSOR:
1641 ret = kvm_s390_get_processor(kvm, attr);
1643 case KVM_S390_VM_CPU_MACHINE:
1644 ret = kvm_s390_get_machine(kvm, attr);
1646 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1647 ret = kvm_s390_get_processor_feat(kvm, attr);
1649 case KVM_S390_VM_CPU_MACHINE_FEAT:
1650 ret = kvm_s390_get_machine_feat(kvm, attr);
1652 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1653 ret = kvm_s390_get_processor_subfunc(kvm, attr);
1655 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
1656 ret = kvm_s390_get_machine_subfunc(kvm, attr);
1662 static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1666 switch (attr->group) {
1667 case KVM_S390_VM_MEM_CTRL:
1668 ret = kvm_s390_set_mem_control(kvm, attr);
1670 case KVM_S390_VM_TOD:
1671 ret = kvm_s390_set_tod(kvm, attr);
1673 case KVM_S390_VM_CPU_MODEL:
1674 ret = kvm_s390_set_cpu_model(kvm, attr);
1676 case KVM_S390_VM_CRYPTO:
1677 ret = kvm_s390_vm_set_crypto(kvm, attr);
1679 case KVM_S390_VM_MIGRATION:
1680 ret = kvm_s390_vm_set_migration(kvm, attr);
1690 static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1694 switch (attr->group) {
1695 case KVM_S390_VM_MEM_CTRL:
1696 ret = kvm_s390_get_mem_control(kvm, attr);
1698 case KVM_S390_VM_TOD:
1699 ret = kvm_s390_get_tod(kvm, attr);
1701 case KVM_S390_VM_CPU_MODEL:
1702 ret = kvm_s390_get_cpu_model(kvm, attr);
1704 case KVM_S390_VM_MIGRATION:
1705 ret = kvm_s390_vm_get_migration(kvm, attr);
1715 static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1719 switch (attr->group) {
1720 case KVM_S390_VM_MEM_CTRL:
1721 switch (attr->attr) {
1722 case KVM_S390_VM_MEM_ENABLE_CMMA:
1723 case KVM_S390_VM_MEM_CLR_CMMA:
1724 ret = sclp.has_cmma ? 0 : -ENXIO;
1726 case KVM_S390_VM_MEM_LIMIT_SIZE:
1734 case KVM_S390_VM_TOD:
1735 switch (attr->attr) {
1736 case KVM_S390_VM_TOD_LOW:
1737 case KVM_S390_VM_TOD_HIGH:
1745 case KVM_S390_VM_CPU_MODEL:
1746 switch (attr->attr) {
1747 case KVM_S390_VM_CPU_PROCESSOR:
1748 case KVM_S390_VM_CPU_MACHINE:
1749 case KVM_S390_VM_CPU_PROCESSOR_FEAT:
1750 case KVM_S390_VM_CPU_MACHINE_FEAT:
1751 case KVM_S390_VM_CPU_MACHINE_SUBFUNC:
1752 case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC:
1760 case KVM_S390_VM_CRYPTO:
1761 switch (attr->attr) {
1762 case KVM_S390_VM_CRYPTO_ENABLE_AES_KW:
1763 case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW:
1764 case KVM_S390_VM_CRYPTO_DISABLE_AES_KW:
1765 case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW:
1768 case KVM_S390_VM_CRYPTO_ENABLE_APIE:
1769 case KVM_S390_VM_CRYPTO_DISABLE_APIE:
1770 ret = ap_instructions_available() ? 0 : -ENXIO;
1777 case KVM_S390_VM_MIGRATION:
1788 static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1792 int srcu_idx, i, r = 0;
1794 if (args->flags != 0)
1797 /* Is this guest using storage keys? */
1798 if (!mm_uses_skeys(current->mm))
1799 return KVM_S390_GET_SKEYS_NONE;
1801 /* Enforce sane limit on memory allocation */
1802 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1805 keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
1809 down_read(¤t->mm->mmap_sem);
1810 srcu_idx = srcu_read_lock(&kvm->srcu);
1811 for (i = 0; i < args->count; i++) {
1812 hva = gfn_to_hva(kvm, args->start_gfn + i);
1813 if (kvm_is_error_hva(hva)) {
1818 r = get_guest_storage_key(current->mm, hva, &keys[i]);
1822 srcu_read_unlock(&kvm->srcu, srcu_idx);
1823 up_read(¤t->mm->mmap_sem);
1826 r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys,
1827 sizeof(uint8_t) * args->count);
1836 static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
1840 int srcu_idx, i, r = 0;
1843 if (args->flags != 0)
1846 /* Enforce sane limit on memory allocation */
1847 if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
1850 keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL);
1854 r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr,
1855 sizeof(uint8_t) * args->count);
1861 /* Enable storage key handling for the guest */
1862 r = s390_enable_skey();
1867 down_read(¤t->mm->mmap_sem);
1868 srcu_idx = srcu_read_lock(&kvm->srcu);
1869 while (i < args->count) {
1871 hva = gfn_to_hva(kvm, args->start_gfn + i);
1872 if (kvm_is_error_hva(hva)) {
1877 /* Lowest order bit is reserved */
1878 if (keys[i] & 0x01) {
1883 r = set_guest_storage_key(current->mm, hva, keys[i], 0);
1885 r = fixup_user_fault(current, current->mm, hva,
1886 FAULT_FLAG_WRITE, &unlocked);
1893 srcu_read_unlock(&kvm->srcu, srcu_idx);
1894 up_read(¤t->mm->mmap_sem);
1901 * Base address and length must be sent at the start of each block, therefore
1902 * it's cheaper to send some clean data, as long as it's less than the size of
1905 #define KVM_S390_MAX_BIT_DISTANCE (2 * sizeof(void *))
1906 /* for consistency */
1907 #define KVM_S390_CMMA_SIZE_MAX ((u32)KVM_S390_SKEYS_MAX)
1910 * Similar to gfn_to_memslot, but returns the index of a memslot also when the
1911 * address falls in a hole. In that case the index of one of the memslots
1912 * bordering the hole is returned.
1914 static int gfn_to_memslot_approx(struct kvm_memslots *slots, gfn_t gfn)
1916 int start = 0, end = slots->used_slots;
1917 int slot = atomic_read(&slots->lru_slot);
1918 struct kvm_memory_slot *memslots = slots->memslots;
1920 if (gfn >= memslots[slot].base_gfn &&
1921 gfn < memslots[slot].base_gfn + memslots[slot].npages)
1924 while (start < end) {
1925 slot = start + (end - start) / 2;
1927 if (gfn >= memslots[slot].base_gfn)
1933 if (gfn >= memslots[start].base_gfn &&
1934 gfn < memslots[start].base_gfn + memslots[start].npages) {
1935 atomic_set(&slots->lru_slot, start);
1941 static int kvm_s390_peek_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1942 u8 *res, unsigned long bufsize)
1944 unsigned long pgstev, hva, cur_gfn = args->start_gfn;
1947 while (args->count < bufsize) {
1948 hva = gfn_to_hva(kvm, cur_gfn);
1950 * We return an error if the first value was invalid, but we
1951 * return successfully if at least one value was copied.
1953 if (kvm_is_error_hva(hva))
1954 return args->count ? 0 : -EFAULT;
1955 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
1957 res[args->count++] = (pgstev >> 24) & 0x43;
1964 static unsigned long kvm_s390_next_dirty_cmma(struct kvm_memslots *slots,
1965 unsigned long cur_gfn)
1967 int slotidx = gfn_to_memslot_approx(slots, cur_gfn);
1968 struct kvm_memory_slot *ms = slots->memslots + slotidx;
1969 unsigned long ofs = cur_gfn - ms->base_gfn;
1971 if (ms->base_gfn + ms->npages <= cur_gfn) {
1973 /* If we are above the highest slot, wrap around */
1975 slotidx = slots->used_slots - 1;
1977 ms = slots->memslots + slotidx;
1980 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, ofs);
1981 while ((slotidx > 0) && (ofs >= ms->npages)) {
1983 ms = slots->memslots + slotidx;
1984 ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, 0);
1986 return ms->base_gfn + ofs;
1989 static int kvm_s390_get_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args,
1990 u8 *res, unsigned long bufsize)
1992 unsigned long mem_end, cur_gfn, next_gfn, hva, pgstev;
1993 struct kvm_memslots *slots = kvm_memslots(kvm);
1994 struct kvm_memory_slot *ms;
1996 cur_gfn = kvm_s390_next_dirty_cmma(slots, args->start_gfn);
1997 ms = gfn_to_memslot(kvm, cur_gfn);
1999 args->start_gfn = cur_gfn;
2002 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2003 mem_end = slots->memslots[0].base_gfn + slots->memslots[0].npages;
2005 while (args->count < bufsize) {
2006 hva = gfn_to_hva(kvm, cur_gfn);
2007 if (kvm_is_error_hva(hva))
2009 /* Decrement only if we actually flipped the bit to 0 */
2010 if (test_and_clear_bit(cur_gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms)))
2011 atomic64_dec(&kvm->arch.cmma_dirty_pages);
2012 if (get_pgste(kvm->mm, hva, &pgstev) < 0)
2014 /* Save the value */
2015 res[args->count++] = (pgstev >> 24) & 0x43;
2016 /* If the next bit is too far away, stop. */
2017 if (next_gfn > cur_gfn + KVM_S390_MAX_BIT_DISTANCE)
2019 /* If we reached the previous "next", find the next one */
2020 if (cur_gfn == next_gfn)
2021 next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1);
2022 /* Reached the end of memory or of the buffer, stop */
2023 if ((next_gfn >= mem_end) ||
2024 (next_gfn - args->start_gfn >= bufsize))
2027 /* Reached the end of the current memslot, take the next one. */
2028 if (cur_gfn - ms->base_gfn >= ms->npages) {
2029 ms = gfn_to_memslot(kvm, cur_gfn);
2038 * This function searches for the next page with dirty CMMA attributes, and
2039 * saves the attributes in the buffer up to either the end of the buffer or
2040 * until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found;
2041 * no trailing clean bytes are saved.
2042 * In case no dirty bits were found, or if CMMA was not enabled or used, the
2043 * output buffer will indicate 0 as length.
2045 static int kvm_s390_get_cmma_bits(struct kvm *kvm,
2046 struct kvm_s390_cmma_log *args)
2048 unsigned long bufsize;
2049 int srcu_idx, peek, ret;
2052 if (!kvm->arch.use_cmma)
2054 /* Invalid/unsupported flags were specified */
2055 if (args->flags & ~KVM_S390_CMMA_PEEK)
2057 /* Migration mode query, and we are not doing a migration */
2058 peek = !!(args->flags & KVM_S390_CMMA_PEEK);
2059 if (!peek && !kvm->arch.migration_mode)
2061 /* CMMA is disabled or was not used, or the buffer has length zero */
2062 bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX);
2063 if (!bufsize || !kvm->mm->context.uses_cmm) {
2064 memset(args, 0, sizeof(*args));
2067 /* We are not peeking, and there are no dirty pages */
2068 if (!peek && !atomic64_read(&kvm->arch.cmma_dirty_pages)) {
2069 memset(args, 0, sizeof(*args));
2073 values = vmalloc(bufsize);
2077 down_read(&kvm->mm->mmap_sem);
2078 srcu_idx = srcu_read_lock(&kvm->srcu);
2080 ret = kvm_s390_peek_cmma(kvm, args, values, bufsize);
2082 ret = kvm_s390_get_cmma(kvm, args, values, bufsize);
2083 srcu_read_unlock(&kvm->srcu, srcu_idx);
2084 up_read(&kvm->mm->mmap_sem);
2086 if (kvm->arch.migration_mode)
2087 args->remaining = atomic64_read(&kvm->arch.cmma_dirty_pages);
2089 args->remaining = 0;
2091 if (copy_to_user((void __user *)args->values, values, args->count))
2099 * This function sets the CMMA attributes for the given pages. If the input
2100 * buffer has zero length, no action is taken, otherwise the attributes are
2101 * set and the mm->context.uses_cmm flag is set.
2103 static int kvm_s390_set_cmma_bits(struct kvm *kvm,
2104 const struct kvm_s390_cmma_log *args)
2106 unsigned long hva, mask, pgstev, i;
2108 int srcu_idx, r = 0;
2112 if (!kvm->arch.use_cmma)
2114 /* invalid/unsupported flags */
2115 if (args->flags != 0)
2117 /* Enforce sane limit on memory allocation */
2118 if (args->count > KVM_S390_CMMA_SIZE_MAX)
2121 if (args->count == 0)
2124 bits = vmalloc(array_size(sizeof(*bits), args->count));
2128 r = copy_from_user(bits, (void __user *)args->values, args->count);
2134 down_read(&kvm->mm->mmap_sem);
2135 srcu_idx = srcu_read_lock(&kvm->srcu);
2136 for (i = 0; i < args->count; i++) {
2137 hva = gfn_to_hva(kvm, args->start_gfn + i);
2138 if (kvm_is_error_hva(hva)) {
2144 pgstev = pgstev << 24;
2145 mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT;
2146 set_pgste_bits(kvm->mm, hva, mask, pgstev);
2148 srcu_read_unlock(&kvm->srcu, srcu_idx);
2149 up_read(&kvm->mm->mmap_sem);
2151 if (!kvm->mm->context.uses_cmm) {
2152 down_write(&kvm->mm->mmap_sem);
2153 kvm->mm->context.uses_cmm = 1;
2154 up_write(&kvm->mm->mmap_sem);
2161 long kvm_arch_vm_ioctl(struct file *filp,
2162 unsigned int ioctl, unsigned long arg)
2164 struct kvm *kvm = filp->private_data;
2165 void __user *argp = (void __user *)arg;
2166 struct kvm_device_attr attr;
2170 case KVM_S390_INTERRUPT: {
2171 struct kvm_s390_interrupt s390int;
2174 if (copy_from_user(&s390int, argp, sizeof(s390int)))
2176 r = kvm_s390_inject_vm(kvm, &s390int);
2179 case KVM_CREATE_IRQCHIP: {
2180 struct kvm_irq_routing_entry routing;
2183 if (kvm->arch.use_irqchip) {
2184 /* Set up dummy routing. */
2185 memset(&routing, 0, sizeof(routing));
2186 r = kvm_set_irq_routing(kvm, &routing, 0, 0);
2190 case KVM_SET_DEVICE_ATTR: {
2192 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2194 r = kvm_s390_vm_set_attr(kvm, &attr);
2197 case KVM_GET_DEVICE_ATTR: {
2199 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2201 r = kvm_s390_vm_get_attr(kvm, &attr);
2204 case KVM_HAS_DEVICE_ATTR: {
2206 if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
2208 r = kvm_s390_vm_has_attr(kvm, &attr);
2211 case KVM_S390_GET_SKEYS: {
2212 struct kvm_s390_skeys args;
2215 if (copy_from_user(&args, argp,
2216 sizeof(struct kvm_s390_skeys)))
2218 r = kvm_s390_get_skeys(kvm, &args);
2221 case KVM_S390_SET_SKEYS: {
2222 struct kvm_s390_skeys args;
2225 if (copy_from_user(&args, argp,
2226 sizeof(struct kvm_s390_skeys)))
2228 r = kvm_s390_set_skeys(kvm, &args);
2231 case KVM_S390_GET_CMMA_BITS: {
2232 struct kvm_s390_cmma_log args;
2235 if (copy_from_user(&args, argp, sizeof(args)))
2237 mutex_lock(&kvm->slots_lock);
2238 r = kvm_s390_get_cmma_bits(kvm, &args);
2239 mutex_unlock(&kvm->slots_lock);
2241 r = copy_to_user(argp, &args, sizeof(args));
2247 case KVM_S390_SET_CMMA_BITS: {
2248 struct kvm_s390_cmma_log args;
2251 if (copy_from_user(&args, argp, sizeof(args)))
2253 mutex_lock(&kvm->slots_lock);
2254 r = kvm_s390_set_cmma_bits(kvm, &args);
2255 mutex_unlock(&kvm->slots_lock);
2265 static int kvm_s390_apxa_installed(void)
2267 struct ap_config_info info;
2269 if (ap_instructions_available()) {
2270 if (ap_qci(&info) == 0)
2278 * The format of the crypto control block (CRYCB) is specified in the 3 low
2279 * order bits of the CRYCB designation (CRYCBD) field as follows:
2280 * Format 0: Neither the message security assist extension 3 (MSAX3) nor the
2281 * AP extended addressing (APXA) facility are installed.
2282 * Format 1: The APXA facility is not installed but the MSAX3 facility is.
2283 * Format 2: Both the APXA and MSAX3 facilities are installed
2285 static void kvm_s390_set_crycb_format(struct kvm *kvm)
2287 kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb;
2289 /* Clear the CRYCB format bits - i.e., set format 0 by default */
2290 kvm->arch.crypto.crycbd &= ~(CRYCB_FORMAT_MASK);
2292 /* Check whether MSAX3 is installed */
2293 if (!test_kvm_facility(kvm, 76))
2296 if (kvm_s390_apxa_installed())
2297 kvm->arch.crypto.crycbd |= CRYCB_FORMAT2;
2299 kvm->arch.crypto.crycbd |= CRYCB_FORMAT1;
2302 void kvm_arch_crypto_set_masks(struct kvm *kvm, unsigned long *apm,
2303 unsigned long *aqm, unsigned long *adm)
2305 struct kvm_s390_crypto_cb *crycb = kvm->arch.crypto.crycb;
2307 mutex_lock(&kvm->lock);
2308 kvm_s390_vcpu_block_all(kvm);
2310 switch (kvm->arch.crypto.crycbd & CRYCB_FORMAT_MASK) {
2311 case CRYCB_FORMAT2: /* APCB1 use 256 bits */
2312 memcpy(crycb->apcb1.apm, apm, 32);
2313 VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx %016lx %016lx %016lx",
2314 apm[0], apm[1], apm[2], apm[3]);
2315 memcpy(crycb->apcb1.aqm, aqm, 32);
2316 VM_EVENT(kvm, 3, "SET CRYCB: aqm %016lx %016lx %016lx %016lx",
2317 aqm[0], aqm[1], aqm[2], aqm[3]);
2318 memcpy(crycb->apcb1.adm, adm, 32);
2319 VM_EVENT(kvm, 3, "SET CRYCB: adm %016lx %016lx %016lx %016lx",
2320 adm[0], adm[1], adm[2], adm[3]);
2323 case CRYCB_FORMAT0: /* Fall through both use APCB0 */
2324 memcpy(crycb->apcb0.apm, apm, 8);
2325 memcpy(crycb->apcb0.aqm, aqm, 2);
2326 memcpy(crycb->apcb0.adm, adm, 2);
2327 VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx aqm %04x adm %04x",
2328 apm[0], *((unsigned short *)aqm),
2329 *((unsigned short *)adm));
2331 default: /* Can not happen */
2335 /* recreate the shadow crycb for each vcpu */
2336 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
2337 kvm_s390_vcpu_unblock_all(kvm);
2338 mutex_unlock(&kvm->lock);
2340 EXPORT_SYMBOL_GPL(kvm_arch_crypto_set_masks);
2342 void kvm_arch_crypto_clear_masks(struct kvm *kvm)
2344 mutex_lock(&kvm->lock);
2345 kvm_s390_vcpu_block_all(kvm);
2347 memset(&kvm->arch.crypto.crycb->apcb0, 0,
2348 sizeof(kvm->arch.crypto.crycb->apcb0));
2349 memset(&kvm->arch.crypto.crycb->apcb1, 0,
2350 sizeof(kvm->arch.crypto.crycb->apcb1));
2352 VM_EVENT(kvm, 3, "%s", "CLR CRYCB:");
2353 /* recreate the shadow crycb for each vcpu */
2354 kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART);
2355 kvm_s390_vcpu_unblock_all(kvm);
2356 mutex_unlock(&kvm->lock);
2358 EXPORT_SYMBOL_GPL(kvm_arch_crypto_clear_masks);
2360 static u64 kvm_s390_get_initial_cpuid(void)
2365 cpuid.version = 0xff;
2366 return *((u64 *) &cpuid);
2369 static void kvm_s390_crypto_init(struct kvm *kvm)
2371 kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb;
2372 kvm_s390_set_crycb_format(kvm);
2374 if (!test_kvm_facility(kvm, 76))
2377 /* Enable AES/DEA protected key functions by default */
2378 kvm->arch.crypto.aes_kw = 1;
2379 kvm->arch.crypto.dea_kw = 1;
2380 get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask,
2381 sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask));
2382 get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask,
2383 sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask));
2386 static void sca_dispose(struct kvm *kvm)
2388 if (kvm->arch.use_esca)
2389 free_pages_exact(kvm->arch.sca, sizeof(struct esca_block));
2391 free_page((unsigned long)(kvm->arch.sca));
2392 kvm->arch.sca = NULL;
2395 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
2397 gfp_t alloc_flags = GFP_KERNEL;
2399 char debug_name[16];
2400 static unsigned long sca_offset;
2403 #ifdef CONFIG_KVM_S390_UCONTROL
2404 if (type & ~KVM_VM_S390_UCONTROL)
2406 if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
2413 rc = s390_enable_sie();
2419 if (!sclp.has_64bscao)
2420 alloc_flags |= GFP_DMA;
2421 rwlock_init(&kvm->arch.sca_lock);
2422 /* start with basic SCA */
2423 kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags);
2426 spin_lock(&kvm_lock);
2428 if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE)
2430 kvm->arch.sca = (struct bsca_block *)
2431 ((char *) kvm->arch.sca + sca_offset);
2432 spin_unlock(&kvm_lock);
2434 sprintf(debug_name, "kvm-%u", current->pid);
2436 kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
2440 BUILD_BUG_ON(sizeof(struct sie_page2) != 4096);
2441 kvm->arch.sie_page2 =
2442 (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2443 if (!kvm->arch.sie_page2)
2446 kvm->arch.sie_page2->kvm = kvm;
2447 kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
2449 for (i = 0; i < kvm_s390_fac_size(); i++) {
2450 kvm->arch.model.fac_mask[i] = S390_lowcore.stfle_fac_list[i] &
2451 (kvm_s390_fac_base[i] |
2452 kvm_s390_fac_ext[i]);
2453 kvm->arch.model.fac_list[i] = S390_lowcore.stfle_fac_list[i] &
2454 kvm_s390_fac_base[i];
2456 kvm->arch.model.subfuncs = kvm_s390_available_subfunc;
2458 /* we are always in czam mode - even on pre z14 machines */
2459 set_kvm_facility(kvm->arch.model.fac_mask, 138);
2460 set_kvm_facility(kvm->arch.model.fac_list, 138);
2461 /* we emulate STHYI in kvm */
2462 set_kvm_facility(kvm->arch.model.fac_mask, 74);
2463 set_kvm_facility(kvm->arch.model.fac_list, 74);
2464 if (MACHINE_HAS_TLB_GUEST) {
2465 set_kvm_facility(kvm->arch.model.fac_mask, 147);
2466 set_kvm_facility(kvm->arch.model.fac_list, 147);
2469 kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid();
2470 kvm->arch.model.ibc = sclp.ibc & 0x0fff;
2472 kvm_s390_crypto_init(kvm);
2474 mutex_init(&kvm->arch.float_int.ais_lock);
2475 spin_lock_init(&kvm->arch.float_int.lock);
2476 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2477 INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]);
2478 init_waitqueue_head(&kvm->arch.ipte_wq);
2479 mutex_init(&kvm->arch.ipte_mutex);
2481 debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
2482 VM_EVENT(kvm, 3, "vm created with type %lu", type);
2484 if (type & KVM_VM_S390_UCONTROL) {
2485 kvm->arch.gmap = NULL;
2486 kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT;
2488 if (sclp.hamax == U64_MAX)
2489 kvm->arch.mem_limit = TASK_SIZE_MAX;
2491 kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX,
2493 kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1);
2494 if (!kvm->arch.gmap)
2496 kvm->arch.gmap->private = kvm;
2497 kvm->arch.gmap->pfault_enabled = 0;
2500 kvm->arch.use_pfmfi = sclp.has_pfmfi;
2501 kvm->arch.use_skf = sclp.has_skey;
2502 spin_lock_init(&kvm->arch.start_stop_lock);
2503 kvm_s390_vsie_init(kvm);
2504 kvm_s390_gisa_init(kvm);
2505 KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid);
2509 free_page((unsigned long)kvm->arch.sie_page2);
2510 debug_unregister(kvm->arch.dbf);
2512 KVM_EVENT(3, "creation of vm failed: %d", rc);
2516 bool kvm_arch_has_vcpu_debugfs(void)
2521 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
2526 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
2528 VCPU_EVENT(vcpu, 3, "%s", "free cpu");
2529 trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
2530 kvm_s390_clear_local_irqs(vcpu);
2531 kvm_clear_async_pf_completion_queue(vcpu);
2532 if (!kvm_is_ucontrol(vcpu->kvm))
2535 if (kvm_is_ucontrol(vcpu->kvm))
2536 gmap_remove(vcpu->arch.gmap);
2538 if (vcpu->kvm->arch.use_cmma)
2539 kvm_s390_vcpu_unsetup_cmma(vcpu);
2540 free_page((unsigned long)(vcpu->arch.sie_block));
2542 kvm_vcpu_uninit(vcpu);
2543 kmem_cache_free(kvm_vcpu_cache, vcpu);
2546 static void kvm_free_vcpus(struct kvm *kvm)
2549 struct kvm_vcpu *vcpu;
2551 kvm_for_each_vcpu(i, vcpu, kvm)
2552 kvm_arch_vcpu_destroy(vcpu);
2554 mutex_lock(&kvm->lock);
2555 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
2556 kvm->vcpus[i] = NULL;
2558 atomic_set(&kvm->online_vcpus, 0);
2559 mutex_unlock(&kvm->lock);
2562 void kvm_arch_destroy_vm(struct kvm *kvm)
2564 kvm_free_vcpus(kvm);
2566 debug_unregister(kvm->arch.dbf);
2567 kvm_s390_gisa_destroy(kvm);
2568 free_page((unsigned long)kvm->arch.sie_page2);
2569 if (!kvm_is_ucontrol(kvm))
2570 gmap_remove(kvm->arch.gmap);
2571 kvm_s390_destroy_adapters(kvm);
2572 kvm_s390_clear_float_irqs(kvm);
2573 kvm_s390_vsie_destroy(kvm);
2574 KVM_EVENT(3, "vm 0x%pK destroyed", kvm);
2577 /* Section: vcpu related */
2578 static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu)
2580 vcpu->arch.gmap = gmap_create(current->mm, -1UL);
2581 if (!vcpu->arch.gmap)
2583 vcpu->arch.gmap->private = vcpu->kvm;
2588 static void sca_del_vcpu(struct kvm_vcpu *vcpu)
2590 if (!kvm_s390_use_sca_entries())
2592 read_lock(&vcpu->kvm->arch.sca_lock);
2593 if (vcpu->kvm->arch.use_esca) {
2594 struct esca_block *sca = vcpu->kvm->arch.sca;
2596 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
2597 sca->cpu[vcpu->vcpu_id].sda = 0;
2599 struct bsca_block *sca = vcpu->kvm->arch.sca;
2601 clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
2602 sca->cpu[vcpu->vcpu_id].sda = 0;
2604 read_unlock(&vcpu->kvm->arch.sca_lock);
2607 static void sca_add_vcpu(struct kvm_vcpu *vcpu)
2609 if (!kvm_s390_use_sca_entries()) {
2610 struct bsca_block *sca = vcpu->kvm->arch.sca;
2612 /* we still need the basic sca for the ipte control */
2613 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2614 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
2617 read_lock(&vcpu->kvm->arch.sca_lock);
2618 if (vcpu->kvm->arch.use_esca) {
2619 struct esca_block *sca = vcpu->kvm->arch.sca;
2621 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
2622 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2623 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU;
2624 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
2625 set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn);
2627 struct bsca_block *sca = vcpu->kvm->arch.sca;
2629 sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block;
2630 vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
2631 vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
2632 set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn);
2634 read_unlock(&vcpu->kvm->arch.sca_lock);
2637 /* Basic SCA to Extended SCA data copy routines */
2638 static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s)
2641 d->sigp_ctrl.c = s->sigp_ctrl.c;
2642 d->sigp_ctrl.scn = s->sigp_ctrl.scn;
2645 static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s)
2649 d->ipte_control = s->ipte_control;
2651 for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++)
2652 sca_copy_entry(&d->cpu[i], &s->cpu[i]);
2655 static int sca_switch_to_extended(struct kvm *kvm)
2657 struct bsca_block *old_sca = kvm->arch.sca;
2658 struct esca_block *new_sca;
2659 struct kvm_vcpu *vcpu;
2660 unsigned int vcpu_idx;
2663 new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO);
2667 scaoh = (u32)((u64)(new_sca) >> 32);
2668 scaol = (u32)(u64)(new_sca) & ~0x3fU;
2670 kvm_s390_vcpu_block_all(kvm);
2671 write_lock(&kvm->arch.sca_lock);
2673 sca_copy_b_to_e(new_sca, old_sca);
2675 kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) {
2676 vcpu->arch.sie_block->scaoh = scaoh;
2677 vcpu->arch.sie_block->scaol = scaol;
2678 vcpu->arch.sie_block->ecb2 |= ECB2_ESCA;
2680 kvm->arch.sca = new_sca;
2681 kvm->arch.use_esca = 1;
2683 write_unlock(&kvm->arch.sca_lock);
2684 kvm_s390_vcpu_unblock_all(kvm);
2686 free_page((unsigned long)old_sca);
2688 VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)",
2689 old_sca, kvm->arch.sca);
2693 static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id)
2697 if (!kvm_s390_use_sca_entries()) {
2698 if (id < KVM_MAX_VCPUS)
2702 if (id < KVM_S390_BSCA_CPU_SLOTS)
2704 if (!sclp.has_esca || !sclp.has_64bscao)
2707 mutex_lock(&kvm->lock);
2708 rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm);
2709 mutex_unlock(&kvm->lock);
2711 return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS;
2714 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
2716 vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
2717 kvm_clear_async_pf_completion_queue(vcpu);
2718 vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX |
2724 kvm_s390_set_prefix(vcpu, 0);
2725 if (test_kvm_facility(vcpu->kvm, 64))
2726 vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
2727 if (test_kvm_facility(vcpu->kvm, 82))
2728 vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC;
2729 if (test_kvm_facility(vcpu->kvm, 133))
2730 vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
2731 if (test_kvm_facility(vcpu->kvm, 156))
2732 vcpu->run->kvm_valid_regs |= KVM_SYNC_ETOKEN;
2733 /* fprs can be synchronized via vrs, even if the guest has no vx. With
2734 * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
2737 vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
2739 vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
2741 if (kvm_is_ucontrol(vcpu->kvm))
2742 return __kvm_ucontrol_vcpu_init(vcpu);
2747 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2748 static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2750 WARN_ON_ONCE(vcpu->arch.cputm_start != 0);
2751 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2752 vcpu->arch.cputm_start = get_tod_clock_fast();
2753 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2756 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2757 static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2759 WARN_ON_ONCE(vcpu->arch.cputm_start == 0);
2760 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2761 vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start;
2762 vcpu->arch.cputm_start = 0;
2763 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2766 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2767 static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2769 WARN_ON_ONCE(vcpu->arch.cputm_enabled);
2770 vcpu->arch.cputm_enabled = true;
2771 __start_cpu_timer_accounting(vcpu);
2774 /* needs disabled preemption to protect from TOD sync and vcpu_load/put */
2775 static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2777 WARN_ON_ONCE(!vcpu->arch.cputm_enabled);
2778 __stop_cpu_timer_accounting(vcpu);
2779 vcpu->arch.cputm_enabled = false;
2782 static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2784 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2785 __enable_cpu_timer_accounting(vcpu);
2789 static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu)
2791 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2792 __disable_cpu_timer_accounting(vcpu);
2796 /* set the cpu timer - may only be called from the VCPU thread itself */
2797 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm)
2799 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2800 raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount);
2801 if (vcpu->arch.cputm_enabled)
2802 vcpu->arch.cputm_start = get_tod_clock_fast();
2803 vcpu->arch.sie_block->cputm = cputm;
2804 raw_write_seqcount_end(&vcpu->arch.cputm_seqcount);
2808 /* update and get the cpu timer - can also be called from other VCPU threads */
2809 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu)
2814 if (unlikely(!vcpu->arch.cputm_enabled))
2815 return vcpu->arch.sie_block->cputm;
2817 preempt_disable(); /* protect from TOD sync and vcpu_load/put */
2819 seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount);
2821 * If the writer would ever execute a read in the critical
2822 * section, e.g. in irq context, we have a deadlock.
2824 WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu);
2825 value = vcpu->arch.sie_block->cputm;
2826 /* if cputm_start is 0, accounting is being started/stopped */
2827 if (likely(vcpu->arch.cputm_start))
2828 value -= get_tod_clock_fast() - vcpu->arch.cputm_start;
2829 } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1));
2834 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2837 gmap_enable(vcpu->arch.enabled_gmap);
2838 kvm_s390_set_cpuflags(vcpu, CPUSTAT_RUNNING);
2839 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
2840 __start_cpu_timer_accounting(vcpu);
2844 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
2847 if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
2848 __stop_cpu_timer_accounting(vcpu);
2849 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING);
2850 vcpu->arch.enabled_gmap = gmap_get_enabled();
2851 gmap_disable(vcpu->arch.enabled_gmap);
2855 static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
2857 /* this equals initial cpu reset in pop, but we don't switch to ESA */
2858 vcpu->arch.sie_block->gpsw.mask = 0UL;
2859 vcpu->arch.sie_block->gpsw.addr = 0UL;
2860 kvm_s390_set_prefix(vcpu, 0);
2861 kvm_s390_set_cpu_timer(vcpu, 0);
2862 vcpu->arch.sie_block->ckc = 0UL;
2863 vcpu->arch.sie_block->todpr = 0;
2864 memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
2865 vcpu->arch.sie_block->gcr[0] = CR0_UNUSED_56 |
2866 CR0_INTERRUPT_KEY_SUBMASK |
2867 CR0_MEASUREMENT_ALERT_SUBMASK;
2868 vcpu->arch.sie_block->gcr[14] = CR14_UNUSED_32 |
2870 CR14_EXTERNAL_DAMAGE_SUBMASK;
2871 /* make sure the new fpc will be lazily loaded */
2873 current->thread.fpu.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 return kvm_s390_vcpu_has_irq(vcpu, 0);
3102 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
3104 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
3107 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
3109 atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
3113 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu)
3115 atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20);
3118 static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
3120 atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
3124 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu)
3126 return atomic_read(&vcpu->arch.sie_block->prog20) &
3127 (PROG_BLOCK_SIE | PROG_REQUEST);
3130 static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
3132 atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
3136 * Kick a guest cpu out of (v)SIE and wait until (v)SIE is not running.
3137 * If the CPU is not running (e.g. waiting as idle) the function will
3138 * return immediately. */
3139 void exit_sie(struct kvm_vcpu *vcpu)
3141 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
3142 kvm_s390_vsie_kick(vcpu);
3143 while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE)
3147 /* Kick a guest cpu out of SIE to process a request synchronously */
3148 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu)
3150 kvm_make_request(req, vcpu);
3151 kvm_s390_vcpu_request(vcpu);
3154 static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start,
3157 struct kvm *kvm = gmap->private;
3158 struct kvm_vcpu *vcpu;
3159 unsigned long prefix;
3162 if (gmap_is_shadow(gmap))
3164 if (start >= 1UL << 31)
3165 /* We are only interested in prefix pages */
3167 kvm_for_each_vcpu(i, vcpu, kvm) {
3168 /* match against both prefix pages */
3169 prefix = kvm_s390_get_prefix(vcpu);
3170 if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) {
3171 VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx",
3173 kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu);
3178 bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
3180 /* do not poll with more than halt_poll_max_steal percent of steal time */
3181 if (S390_lowcore.avg_steal_timer * 100 / (TICK_USEC << 12) >=
3182 halt_poll_max_steal) {
3183 vcpu->stat.halt_no_poll_steal++;
3189 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
3191 /* kvm common code refers to this, but never calls it */
3196 static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
3197 struct kvm_one_reg *reg)
3202 case KVM_REG_S390_TODPR:
3203 r = put_user(vcpu->arch.sie_block->todpr,
3204 (u32 __user *)reg->addr);
3206 case KVM_REG_S390_EPOCHDIFF:
3207 r = put_user(vcpu->arch.sie_block->epoch,
3208 (u64 __user *)reg->addr);
3210 case KVM_REG_S390_CPU_TIMER:
3211 r = put_user(kvm_s390_get_cpu_timer(vcpu),
3212 (u64 __user *)reg->addr);
3214 case KVM_REG_S390_CLOCK_COMP:
3215 r = put_user(vcpu->arch.sie_block->ckc,
3216 (u64 __user *)reg->addr);
3218 case KVM_REG_S390_PFTOKEN:
3219 r = put_user(vcpu->arch.pfault_token,
3220 (u64 __user *)reg->addr);
3222 case KVM_REG_S390_PFCOMPARE:
3223 r = put_user(vcpu->arch.pfault_compare,
3224 (u64 __user *)reg->addr);
3226 case KVM_REG_S390_PFSELECT:
3227 r = put_user(vcpu->arch.pfault_select,
3228 (u64 __user *)reg->addr);
3230 case KVM_REG_S390_PP:
3231 r = put_user(vcpu->arch.sie_block->pp,
3232 (u64 __user *)reg->addr);
3234 case KVM_REG_S390_GBEA:
3235 r = put_user(vcpu->arch.sie_block->gbea,
3236 (u64 __user *)reg->addr);
3245 static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
3246 struct kvm_one_reg *reg)
3252 case KVM_REG_S390_TODPR:
3253 r = get_user(vcpu->arch.sie_block->todpr,
3254 (u32 __user *)reg->addr);
3256 case KVM_REG_S390_EPOCHDIFF:
3257 r = get_user(vcpu->arch.sie_block->epoch,
3258 (u64 __user *)reg->addr);
3260 case KVM_REG_S390_CPU_TIMER:
3261 r = get_user(val, (u64 __user *)reg->addr);
3263 kvm_s390_set_cpu_timer(vcpu, val);
3265 case KVM_REG_S390_CLOCK_COMP:
3266 r = get_user(vcpu->arch.sie_block->ckc,
3267 (u64 __user *)reg->addr);
3269 case KVM_REG_S390_PFTOKEN:
3270 r = get_user(vcpu->arch.pfault_token,
3271 (u64 __user *)reg->addr);
3272 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3273 kvm_clear_async_pf_completion_queue(vcpu);
3275 case KVM_REG_S390_PFCOMPARE:
3276 r = get_user(vcpu->arch.pfault_compare,
3277 (u64 __user *)reg->addr);
3279 case KVM_REG_S390_PFSELECT:
3280 r = get_user(vcpu->arch.pfault_select,
3281 (u64 __user *)reg->addr);
3283 case KVM_REG_S390_PP:
3284 r = get_user(vcpu->arch.sie_block->pp,
3285 (u64 __user *)reg->addr);
3287 case KVM_REG_S390_GBEA:
3288 r = get_user(vcpu->arch.sie_block->gbea,
3289 (u64 __user *)reg->addr);
3298 static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
3300 kvm_s390_vcpu_initial_reset(vcpu);
3304 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3307 memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs));
3312 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
3315 memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs));
3320 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
3321 struct kvm_sregs *sregs)
3325 memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs));
3326 memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
3332 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
3333 struct kvm_sregs *sregs)
3337 memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs));
3338 memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
3344 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3350 if (test_fp_ctl(fpu->fpc)) {
3354 vcpu->run->s.regs.fpc = fpu->fpc;
3356 convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
3357 (freg_t *) fpu->fprs);
3359 memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
3366 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3370 /* make sure we have the latest values */
3373 convert_vx_to_fp((freg_t *) fpu->fprs,
3374 (__vector128 *) vcpu->run->s.regs.vrs);
3376 memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs));
3377 fpu->fpc = vcpu->run->s.regs.fpc;
3383 static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
3387 if (!is_vcpu_stopped(vcpu))
3390 vcpu->run->psw_mask = psw.mask;
3391 vcpu->run->psw_addr = psw.addr;
3396 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
3397 struct kvm_translation *tr)
3399 return -EINVAL; /* not implemented yet */
3402 #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
3403 KVM_GUESTDBG_USE_HW_BP | \
3404 KVM_GUESTDBG_ENABLE)
3406 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
3407 struct kvm_guest_debug *dbg)
3413 vcpu->guest_debug = 0;
3414 kvm_s390_clear_bp_data(vcpu);
3416 if (dbg->control & ~VALID_GUESTDBG_FLAGS) {
3420 if (!sclp.has_gpere) {
3425 if (dbg->control & KVM_GUESTDBG_ENABLE) {
3426 vcpu->guest_debug = dbg->control;
3427 /* enforce guest PER */
3428 kvm_s390_set_cpuflags(vcpu, CPUSTAT_P);
3430 if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
3431 rc = kvm_s390_import_bp_data(vcpu, dbg);
3433 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
3434 vcpu->arch.guestdbg.last_bp = 0;
3438 vcpu->guest_debug = 0;
3439 kvm_s390_clear_bp_data(vcpu);
3440 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
3448 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
3449 struct kvm_mp_state *mp_state)
3455 /* CHECK_STOP and LOAD are not supported yet */
3456 ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
3457 KVM_MP_STATE_OPERATING;
3463 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
3464 struct kvm_mp_state *mp_state)
3470 /* user space knows about this interface - let it control the state */
3471 vcpu->kvm->arch.user_cpu_state_ctrl = 1;
3473 switch (mp_state->mp_state) {
3474 case KVM_MP_STATE_STOPPED:
3475 kvm_s390_vcpu_stop(vcpu);
3477 case KVM_MP_STATE_OPERATING:
3478 kvm_s390_vcpu_start(vcpu);
3480 case KVM_MP_STATE_LOAD:
3481 case KVM_MP_STATE_CHECK_STOP:
3482 /* fall through - CHECK_STOP and LOAD are not supported yet */
3491 static bool ibs_enabled(struct kvm_vcpu *vcpu)
3493 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_IBS);
3496 static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
3499 kvm_s390_vcpu_request_handled(vcpu);
3500 if (!kvm_request_pending(vcpu))
3503 * We use MMU_RELOAD just to re-arm the ipte notifier for the
3504 * guest prefix page. gmap_mprotect_notify will wait on the ptl lock.
3505 * This ensures that the ipte instruction for this request has
3506 * already finished. We might race against a second unmapper that
3507 * wants to set the blocking bit. Lets just retry the request loop.
3509 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
3511 rc = gmap_mprotect_notify(vcpu->arch.gmap,
3512 kvm_s390_get_prefix(vcpu),
3513 PAGE_SIZE * 2, PROT_WRITE);
3515 kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
3521 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {
3522 vcpu->arch.sie_block->ihcpu = 0xffff;
3526 if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
3527 if (!ibs_enabled(vcpu)) {
3528 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
3529 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IBS);
3534 if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
3535 if (ibs_enabled(vcpu)) {
3536 trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
3537 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IBS);
3542 if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) {
3543 vcpu->arch.sie_block->ictl |= ICTL_OPEREXC;
3547 if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) {
3549 * Disable CMM virtualization; we will emulate the ESSA
3550 * instruction manually, in order to provide additional
3551 * functionalities needed for live migration.
3553 vcpu->arch.sie_block->ecb2 &= ~ECB2_CMMA;
3557 if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) {
3559 * Re-enable CMM virtualization if CMMA is available and
3560 * CMM has been used.
3562 if ((vcpu->kvm->arch.use_cmma) &&
3563 (vcpu->kvm->mm->context.uses_cmm))
3564 vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
3568 /* nothing to do, just clear the request */
3569 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
3570 /* we left the vsie handler, nothing to do, just clear the request */
3571 kvm_clear_request(KVM_REQ_VSIE_RESTART, vcpu);
3576 void kvm_s390_set_tod_clock(struct kvm *kvm,
3577 const struct kvm_s390_vm_tod_clock *gtod)
3579 struct kvm_vcpu *vcpu;
3580 struct kvm_s390_tod_clock_ext htod;
3583 mutex_lock(&kvm->lock);
3586 get_tod_clock_ext((char *)&htod);
3588 kvm->arch.epoch = gtod->tod - htod.tod;
3590 if (test_kvm_facility(kvm, 139)) {
3591 kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
3592 if (kvm->arch.epoch > gtod->tod)
3593 kvm->arch.epdx -= 1;
3596 kvm_s390_vcpu_block_all(kvm);
3597 kvm_for_each_vcpu(i, vcpu, kvm) {
3598 vcpu->arch.sie_block->epoch = kvm->arch.epoch;
3599 vcpu->arch.sie_block->epdx = kvm->arch.epdx;
3602 kvm_s390_vcpu_unblock_all(kvm);
3604 mutex_unlock(&kvm->lock);
3608 * kvm_arch_fault_in_page - fault-in guest page if necessary
3609 * @vcpu: The corresponding virtual cpu
3610 * @gpa: Guest physical address
3611 * @writable: Whether the page should be writable or not
3613 * Make sure that a guest page has been faulted-in on the host.
3615 * Return: Zero on success, negative error code otherwise.
3617 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
3619 return gmap_fault(vcpu->arch.gmap, gpa,
3620 writable ? FAULT_FLAG_WRITE : 0);
3623 static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
3624 unsigned long token)
3626 struct kvm_s390_interrupt inti;
3627 struct kvm_s390_irq irq;
3630 irq.u.ext.ext_params2 = token;
3631 irq.type = KVM_S390_INT_PFAULT_INIT;
3632 WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq));
3634 inti.type = KVM_S390_INT_PFAULT_DONE;
3635 inti.parm64 = token;
3636 WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti));
3640 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
3641 struct kvm_async_pf *work)
3643 trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token);
3644 __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token);
3647 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
3648 struct kvm_async_pf *work)
3650 trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token);
3651 __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token);
3654 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
3655 struct kvm_async_pf *work)
3657 /* s390 will always inject the page directly */
3660 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
3663 * s390 will always inject the page directly,
3664 * but we still want check_async_completion to cleanup
3669 static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
3672 struct kvm_arch_async_pf arch;
3675 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3677 if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) !=
3678 vcpu->arch.pfault_compare)
3680 if (psw_extint_disabled(vcpu))
3682 if (kvm_s390_vcpu_has_irq(vcpu, 0))
3684 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK))
3686 if (!vcpu->arch.gmap->pfault_enabled)
3689 hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
3690 hva += current->thread.gmap_addr & ~PAGE_MASK;
3691 if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
3694 rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
3698 static int vcpu_pre_run(struct kvm_vcpu *vcpu)
3703 * On s390 notifications for arriving pages will be delivered directly
3704 * to the guest but the house keeping for completed pfaults is
3705 * handled outside the worker.
3707 kvm_check_async_pf_completion(vcpu);
3709 vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14];
3710 vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15];
3715 if (test_cpu_flag(CIF_MCCK_PENDING))
3718 if (!kvm_is_ucontrol(vcpu->kvm)) {
3719 rc = kvm_s390_deliver_pending_interrupts(vcpu);
3724 rc = kvm_s390_handle_requests(vcpu);
3728 if (guestdbg_enabled(vcpu)) {
3729 kvm_s390_backup_guest_per_regs(vcpu);
3730 kvm_s390_patch_guest_per_regs(vcpu);
3733 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.gisa_int.kicked_mask);
3735 vcpu->arch.sie_block->icptcode = 0;
3736 cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
3737 VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
3738 trace_kvm_s390_sie_enter(vcpu, cpuflags);
3743 static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
3745 struct kvm_s390_pgm_info pgm_info = {
3746 .code = PGM_ADDRESSING,
3751 VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
3752 trace_kvm_s390_sie_fault(vcpu);
3755 * We want to inject an addressing exception, which is defined as a
3756 * suppressing or terminating exception. However, since we came here
3757 * by a DAT access exception, the PSW still points to the faulting
3758 * instruction since DAT exceptions are nullifying. So we've got
3759 * to look up the current opcode to get the length of the instruction
3760 * to be able to forward the PSW.
3762 rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1);
3763 ilen = insn_length(opcode);
3767 /* Instruction-Fetching Exceptions - we can't detect the ilen.
3768 * Forward by arbitrary ilc, injection will take care of
3769 * nullification if necessary.
3771 pgm_info = vcpu->arch.pgm;
3774 pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
3775 kvm_s390_forward_psw(vcpu, ilen);
3776 return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
3779 static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
3781 struct mcck_volatile_info *mcck_info;
3782 struct sie_page *sie_page;
3784 VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
3785 vcpu->arch.sie_block->icptcode);
3786 trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
3788 if (guestdbg_enabled(vcpu))
3789 kvm_s390_restore_guest_per_regs(vcpu);
3791 vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14;
3792 vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15;
3794 if (exit_reason == -EINTR) {
3795 VCPU_EVENT(vcpu, 3, "%s", "machine check");
3796 sie_page = container_of(vcpu->arch.sie_block,
3797 struct sie_page, sie_block);
3798 mcck_info = &sie_page->mcck_info;
3799 kvm_s390_reinject_machine_check(vcpu, mcck_info);
3803 if (vcpu->arch.sie_block->icptcode > 0) {
3804 int rc = kvm_handle_sie_intercept(vcpu);
3806 if (rc != -EOPNOTSUPP)
3808 vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC;
3809 vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
3810 vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
3811 vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
3813 } else if (exit_reason != -EFAULT) {
3814 vcpu->stat.exit_null++;
3816 } else if (kvm_is_ucontrol(vcpu->kvm)) {
3817 vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL;
3818 vcpu->run->s390_ucontrol.trans_exc_code =
3819 current->thread.gmap_addr;
3820 vcpu->run->s390_ucontrol.pgm_code = 0x10;
3822 } else if (current->thread.gmap_pfault) {
3823 trace_kvm_s390_major_guest_pfault(vcpu);
3824 current->thread.gmap_pfault = 0;
3825 if (kvm_arch_setup_async_pf(vcpu))
3827 return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1);
3829 return vcpu_post_run_fault_in_sie(vcpu);
3832 static int __vcpu_run(struct kvm_vcpu *vcpu)
3834 int rc, exit_reason;
3837 * We try to hold kvm->srcu during most of vcpu_run (except when run-
3838 * ning the guest), so that memslots (and other stuff) are protected
3840 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3843 rc = vcpu_pre_run(vcpu);
3847 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
3849 * As PF_VCPU will be used in fault handler, between
3850 * guest_enter and guest_exit should be no uaccess.
3852 local_irq_disable();
3853 guest_enter_irqoff();
3854 __disable_cpu_timer_accounting(vcpu);
3856 exit_reason = sie64a(vcpu->arch.sie_block,
3857 vcpu->run->s.regs.gprs);
3858 local_irq_disable();
3859 __enable_cpu_timer_accounting(vcpu);
3860 guest_exit_irqoff();
3862 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3864 rc = vcpu_post_run(vcpu, exit_reason);
3865 } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
3867 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
3871 static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
3873 struct runtime_instr_cb *riccb;
3876 riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
3877 gscb = (struct gs_cb *) &kvm_run->s.regs.gscb;
3878 vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
3879 vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
3880 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
3881 kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix);
3882 if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) {
3883 memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128);
3884 /* some control register changes require a tlb flush */
3885 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
3887 if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) {
3888 kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm);
3889 vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc;
3890 vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr;
3891 vcpu->arch.sie_block->pp = kvm_run->s.regs.pp;
3892 vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea;
3894 if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) {
3895 vcpu->arch.pfault_token = kvm_run->s.regs.pft;
3896 vcpu->arch.pfault_select = kvm_run->s.regs.pfs;
3897 vcpu->arch.pfault_compare = kvm_run->s.regs.pfc;
3898 if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)
3899 kvm_clear_async_pf_completion_queue(vcpu);
3902 * If userspace sets the riccb (e.g. after migration) to a valid state,
3903 * we should enable RI here instead of doing the lazy enablement.
3905 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
3906 test_kvm_facility(vcpu->kvm, 64) &&
3908 !(vcpu->arch.sie_block->ecb3 & ECB3_RI)) {
3909 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
3910 vcpu->arch.sie_block->ecb3 |= ECB3_RI;
3913 * If userspace sets the gscb (e.g. after migration) to non-zero,
3914 * we should enable GS here instead of doing the lazy enablement.
3916 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) &&
3917 test_kvm_facility(vcpu->kvm, 133) &&
3919 !vcpu->arch.gs_enabled) {
3920 VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)");
3921 vcpu->arch.sie_block->ecb |= ECB_GS;
3922 vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
3923 vcpu->arch.gs_enabled = 1;
3925 if ((kvm_run->kvm_dirty_regs & KVM_SYNC_BPBC) &&
3926 test_kvm_facility(vcpu->kvm, 82)) {
3927 vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
3928 vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0;
3930 save_access_regs(vcpu->arch.host_acrs);
3931 restore_access_regs(vcpu->run->s.regs.acrs);
3932 /* save host (userspace) fprs/vrs */
3934 vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
3935 vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
3937 current->thread.fpu.regs = vcpu->run->s.regs.vrs;
3939 current->thread.fpu.regs = vcpu->run->s.regs.fprs;
3940 current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
3941 if (test_fp_ctl(current->thread.fpu.fpc))
3942 /* User space provided an invalid FPC, let's clear it */
3943 current->thread.fpu.fpc = 0;
3944 if (MACHINE_HAS_GS) {
3946 __ctl_set_bit(2, 4);
3947 if (current->thread.gs_cb) {
3948 vcpu->arch.host_gscb = current->thread.gs_cb;
3949 save_gs_cb(vcpu->arch.host_gscb);
3951 if (vcpu->arch.gs_enabled) {
3952 current->thread.gs_cb = (struct gs_cb *)
3953 &vcpu->run->s.regs.gscb;
3954 restore_gs_cb(current->thread.gs_cb);
3958 /* SIE will load etoken directly from SDNX and therefore kvm_run */
3960 kvm_run->kvm_dirty_regs = 0;
3963 static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
3965 kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
3966 kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
3967 kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
3968 memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
3969 kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu);
3970 kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc;
3971 kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr;
3972 kvm_run->s.regs.pp = vcpu->arch.sie_block->pp;
3973 kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea;
3974 kvm_run->s.regs.pft = vcpu->arch.pfault_token;
3975 kvm_run->s.regs.pfs = vcpu->arch.pfault_select;
3976 kvm_run->s.regs.pfc = vcpu->arch.pfault_compare;
3977 kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC;
3978 save_access_regs(vcpu->run->s.regs.acrs);
3979 restore_access_regs(vcpu->arch.host_acrs);
3980 /* Save guest register state */
3982 vcpu->run->s.regs.fpc = current->thread.fpu.fpc;
3983 /* Restore will be done lazily at return */
3984 current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
3985 current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
3986 if (MACHINE_HAS_GS) {
3987 __ctl_set_bit(2, 4);
3988 if (vcpu->arch.gs_enabled)
3989 save_gs_cb(current->thread.gs_cb);
3991 current->thread.gs_cb = vcpu->arch.host_gscb;
3992 restore_gs_cb(vcpu->arch.host_gscb);
3994 if (!vcpu->arch.host_gscb)
3995 __ctl_clear_bit(2, 4);
3996 vcpu->arch.host_gscb = NULL;
3998 /* SIE will save etoken directly into SDNX and therefore kvm_run */
4001 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4005 if (kvm_run->immediate_exit)
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);
4207 /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */
4208 kvm_s390_clear_stop_irq(vcpu);
4210 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOPPED);
4211 __disable_ibs_on_vcpu(vcpu);
4213 for (i = 0; i < online_vcpus; i++) {
4214 if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
4216 started_vcpu = vcpu->kvm->vcpus[i];
4220 if (started_vcpus == 1) {
4222 * As we only have one VCPU left, we want to enable the
4223 * IBS facility for that VCPU to speed it up.
4225 __enable_ibs_on_vcpu(started_vcpu);
4228 spin_unlock(&vcpu->kvm->arch.start_stop_lock);
4232 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
4233 struct kvm_enable_cap *cap)
4241 case KVM_CAP_S390_CSS_SUPPORT:
4242 if (!vcpu->kvm->arch.css_support) {
4243 vcpu->kvm->arch.css_support = 1;
4244 VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support");
4245 trace_kvm_s390_enable_css(vcpu->kvm);
4256 static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
4257 struct kvm_s390_mem_op *mop)
4259 void __user *uaddr = (void __user *)mop->buf;
4260 void *tmpbuf = NULL;
4262 const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION
4263 | KVM_S390_MEMOP_F_CHECK_ONLY;
4265 if (mop->flags & ~supported_flags)
4268 if (mop->size > MEM_OP_MAX_SIZE)
4271 if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) {
4272 tmpbuf = vmalloc(mop->size);
4277 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4280 case KVM_S390_MEMOP_LOGICAL_READ:
4281 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
4282 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4283 mop->size, GACC_FETCH);
4286 r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4288 if (copy_to_user(uaddr, tmpbuf, mop->size))
4292 case KVM_S390_MEMOP_LOGICAL_WRITE:
4293 if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) {
4294 r = check_gva_range(vcpu, mop->gaddr, mop->ar,
4295 mop->size, GACC_STORE);
4298 if (copy_from_user(tmpbuf, uaddr, mop->size)) {
4302 r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size);
4308 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
4310 if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0)
4311 kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
4317 long kvm_arch_vcpu_async_ioctl(struct file *filp,
4318 unsigned int ioctl, unsigned long arg)
4320 struct kvm_vcpu *vcpu = filp->private_data;
4321 void __user *argp = (void __user *)arg;
4324 case KVM_S390_IRQ: {
4325 struct kvm_s390_irq s390irq;
4327 if (copy_from_user(&s390irq, argp, sizeof(s390irq)))
4329 return kvm_s390_inject_vcpu(vcpu, &s390irq);
4331 case KVM_S390_INTERRUPT: {
4332 struct kvm_s390_interrupt s390int;
4333 struct kvm_s390_irq s390irq;
4335 if (copy_from_user(&s390int, argp, sizeof(s390int)))
4337 if (s390int_to_s390irq(&s390int, &s390irq))
4339 return kvm_s390_inject_vcpu(vcpu, &s390irq);
4342 return -ENOIOCTLCMD;
4345 long kvm_arch_vcpu_ioctl(struct file *filp,
4346 unsigned int ioctl, unsigned long arg)
4348 struct kvm_vcpu *vcpu = filp->private_data;
4349 void __user *argp = (void __user *)arg;
4356 case KVM_S390_STORE_STATUS:
4357 idx = srcu_read_lock(&vcpu->kvm->srcu);
4358 r = kvm_s390_vcpu_store_status(vcpu, arg);
4359 srcu_read_unlock(&vcpu->kvm->srcu, idx);
4361 case KVM_S390_SET_INITIAL_PSW: {
4365 if (copy_from_user(&psw, argp, sizeof(psw)))
4367 r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
4370 case KVM_S390_INITIAL_RESET:
4371 r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
4373 case KVM_SET_ONE_REG:
4374 case KVM_GET_ONE_REG: {
4375 struct kvm_one_reg reg;
4377 if (copy_from_user(®, argp, sizeof(reg)))
4379 if (ioctl == KVM_SET_ONE_REG)
4380 r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®);
4382 r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®);
4385 #ifdef CONFIG_KVM_S390_UCONTROL
4386 case KVM_S390_UCAS_MAP: {
4387 struct kvm_s390_ucas_mapping ucasmap;
4389 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4394 if (!kvm_is_ucontrol(vcpu->kvm)) {
4399 r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr,
4400 ucasmap.vcpu_addr, ucasmap.length);
4403 case KVM_S390_UCAS_UNMAP: {
4404 struct kvm_s390_ucas_mapping ucasmap;
4406 if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) {
4411 if (!kvm_is_ucontrol(vcpu->kvm)) {
4416 r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr,
4421 case KVM_S390_VCPU_FAULT: {
4422 r = gmap_fault(vcpu->arch.gmap, arg, 0);
4425 case KVM_ENABLE_CAP:
4427 struct kvm_enable_cap cap;
4429 if (copy_from_user(&cap, argp, sizeof(cap)))
4431 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
4434 case KVM_S390_MEM_OP: {
4435 struct kvm_s390_mem_op mem_op;
4437 if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0)
4438 r = kvm_s390_guest_mem_op(vcpu, &mem_op);
4443 case KVM_S390_SET_IRQ_STATE: {
4444 struct kvm_s390_irq_state irq_state;
4447 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4449 if (irq_state.len > VCPU_IRQS_MAX_BUF ||
4450 irq_state.len == 0 ||
4451 irq_state.len % sizeof(struct kvm_s390_irq) > 0) {
4455 /* do not use irq_state.flags, it will break old QEMUs */
4456 r = kvm_s390_set_irq_state(vcpu,
4457 (void __user *) irq_state.buf,
4461 case KVM_S390_GET_IRQ_STATE: {
4462 struct kvm_s390_irq_state irq_state;
4465 if (copy_from_user(&irq_state, argp, sizeof(irq_state)))
4467 if (irq_state.len == 0) {
4471 /* do not use irq_state.flags, it will break old QEMUs */
4472 r = kvm_s390_get_irq_state(vcpu,
4473 (__u8 __user *) irq_state.buf,
4485 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
4487 #ifdef CONFIG_KVM_S390_UCONTROL
4488 if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET)
4489 && (kvm_is_ucontrol(vcpu->kvm))) {
4490 vmf->page = virt_to_page(vcpu->arch.sie_block);
4491 get_page(vmf->page);
4495 return VM_FAULT_SIGBUS;
4498 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
4499 unsigned long npages)
4504 /* Section: memory related */
4505 int kvm_arch_prepare_memory_region(struct kvm *kvm,
4506 struct kvm_memory_slot *memslot,
4507 const struct kvm_userspace_memory_region *mem,
4508 enum kvm_mr_change change)
4510 /* A few sanity checks. We can have memory slots which have to be
4511 located/ended at a segment boundary (1MB). The memory in userland is
4512 ok to be fragmented into various different vmas. It is okay to mmap()
4513 and munmap() stuff in this slot after doing this call at any time */
4515 if (mem->userspace_addr & 0xffffful)
4518 if (mem->memory_size & 0xffffful)
4521 if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit)
4527 void kvm_arch_commit_memory_region(struct kvm *kvm,
4528 const struct kvm_userspace_memory_region *mem,
4529 const struct kvm_memory_slot *old,
4530 const struct kvm_memory_slot *new,
4531 enum kvm_mr_change change)
4537 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4538 old->npages * PAGE_SIZE);
4541 rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE,
4542 old->npages * PAGE_SIZE);
4547 rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr,
4548 mem->guest_phys_addr, mem->memory_size);
4550 case KVM_MR_FLAGS_ONLY:
4553 WARN(1, "Unknown KVM MR CHANGE: %d\n", change);
4556 pr_warn("failed to commit memory region\n");
4560 static inline unsigned long nonhyp_mask(int i)
4562 unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30;
4564 return 0x0000ffffffffffffUL >> (nonhyp_fai << 4);
4567 void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu)
4569 vcpu->valid_wakeup = false;
4572 static int __init kvm_s390_init(void)
4576 if (!sclp.has_sief2) {
4577 pr_info("SIE is not available\n");
4581 if (nested && hpage) {
4582 pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n");
4586 for (i = 0; i < 16; i++)
4587 kvm_s390_fac_base[i] |=
4588 S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
4590 return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
4593 static void __exit kvm_s390_exit(void)
4598 module_init(kvm_s390_init);
4599 module_exit(kvm_s390_exit);
4602 * Enable autoloading of the kvm module.
4603 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
4604 * since x86 takes a different approach.
4606 #include <linux/miscdevice.h>
4607 MODULE_ALIAS_MISCDEV(KVM_MINOR);
4608 MODULE_ALIAS("devname:kvm");